CA2153929A1 - Air ionization system - Google Patents
Air ionization systemInfo
- Publication number
- CA2153929A1 CA2153929A1 CA002153929A CA2153929A CA2153929A1 CA 2153929 A1 CA2153929 A1 CA 2153929A1 CA 002153929 A CA002153929 A CA 002153929A CA 2153929 A CA2153929 A CA 2153929A CA 2153929 A1 CA2153929 A1 CA 2153929A1
- Authority
- CA
- Canada
- Prior art keywords
- ionization
- air
- core
- ozone
- ozone generation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T23/00—Apparatus for generating ions to be introduced into non-enclosed gases, e.g. into the atmosphere
Landscapes
- Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
Abstract
An air ionization device for use in industrial, commercial or residential settings which includes a core section shaped to provide internal venturi action in order to force air outwardly from an ozone manifold. Air fins are provided at the front of the cabinet to prevent turbulence of air as it exits the cabinet. The device further includes electronics for providing controlled negative ozone and ionization output, and a 12VDC power supply for operating system fans and relays. The device can operate as a master unit to control up to four slave units (i.e. up to five units on one system) for providing even distribution of ions and ozone over large industrial areas. In addition, various features are provided to allow for facile servicing of the device, including a purging hose mounted inside the core, removably replaceable ionization needles, and ozone relief holes positioned directly behind the ionization needles for constantly purging the needles and keeping them clean.
Description
3 Field of the Invention:
4 The present invention relates to an air ionization ~ystem for purifying air in a closed area.
7 Bachyloulld of the Invention:
8 The presence of odors, dust, and other cont~m'n~nts in some 9 industrial settings has long been a concern to business owners.
In certain industries where various odors and airborne particles 11 are constantly generated, workers are constantly exposed to an 12 unhealthy environment and products and equipment are constantly 13 exposed to the damaging effects of these contaminants. To address 14 these concerns, these industries have turned to various air purification systems. The main type of industrial air purification 16 system currently in use is an air filtration system. Air 17 filtration systems transport contaminated air through specially 18 designed filters to trap the undesirable particles.
19 To date, however, air filtration systems have proven to be highly ineffective. This is primarily due to the fac~ that in 21 order to filter contaminated air, the air must be physically 22 transported from the area where the contamination is generated to 23 the filtration device. During this process, contaminated air is 24 inevitably drawn directly through areas where it causes the most damage. In addition, air purification systems have no real effect 26 on the contaminated air as it is immediately generated. Thus, a 27 worker using a grinding tool or the like, is immediately subjected 28 to the airborne particles which may be breathed in, or which may 29 settle on clothing, or in hair. Accordingly, these workers are 1 commonly required to wear various filtering masks and protective 2 clothing.
4 The present invention relates to an air ionization ~ystem for purifying air in a closed area.
7 Bachyloulld of the Invention:
8 The presence of odors, dust, and other cont~m'n~nts in some 9 industrial settings has long been a concern to business owners.
In certain industries where various odors and airborne particles 11 are constantly generated, workers are constantly exposed to an 12 unhealthy environment and products and equipment are constantly 13 exposed to the damaging effects of these contaminants. To address 14 these concerns, these industries have turned to various air purification systems. The main type of industrial air purification 16 system currently in use is an air filtration system. Air 17 filtration systems transport contaminated air through specially 18 designed filters to trap the undesirable particles.
19 To date, however, air filtration systems have proven to be highly ineffective. This is primarily due to the fac~ that in 21 order to filter contaminated air, the air must be physically 22 transported from the area where the contamination is generated to 23 the filtration device. During this process, contaminated air is 24 inevitably drawn directly through areas where it causes the most damage. In addition, air purification systems have no real effect 26 on the contaminated air as it is immediately generated. Thus, a 27 worker using a grinding tool or the like, is immediately subjected 28 to the airborne particles which may be breathed in, or which may 29 settle on clothing, or in hair. Accordingly, these workers are 1 commonly required to wear various filtering masks and protective 2 clothing.
3 Moreover, typical air filtration systems require regular and 4 extensive maintenance. The filters must be constantly ~hanged in order to ensure proper operation of the system, and the used 6 filters must be treated as contaminated waste. Accordingly, 7 considerable expense is required for the services of maintenance 8 personal, the cost of new filters, and the disposal of used 9 filters. Also, since the contaminated air is transported through the filtration system, cont~m'n~nts can build up on sensitive areas 11 of the system thereby causing system failure.
12 In other commercial settings such as restaurants, hotels, 13 gymnasiums, etc., the prime concern is with the odors resulting 14 from various activities and from the release of various sprays, chemicals, weldings, or burnings in an enclosed area. Unpleasant 16 odors are, obviously, not conducive to promoting customer 17 satisfaction or employee well-being. For the same reasons 18 discussed above, air filtration systems have not produced 19 satisfactory results in eliminating odors in these settings. Thus, there has long been a need in industrial and commercial settings 21 for an air purification system which would eliminate particles and 22 odors without transporting them through sensitive areas to be 23 filtered.
24 Residential air filtration systems naturally suffer from the same disadvantages. Accordingly, in recent years various air 26 ionization devices have been developed for residential use. Air 27 purification by ionization is an old concept which has only 28 recently gained deserved attention. Residential air ionization 29 systems are designed to negatively ionize contaminated air so that 1 __it will attract electrically positively charged cont~min~nts 2 thereby causing these cont~min~nts attach to each other in mid-air 3 and drop to the floor. In theory, by spreading a constant stream 4 of negatively ionized air combined with a smaller per~entage of positively ionized air over a room, undesirable particles are 6 effectively prevented from becoming airborne at their source.
7 Thus, these particles are never transported into areas where they 8 can cause damage or discomfort.
9 In addition, recent studies indicate that air ionization devices can actually have a beneficial effect even in the total 11 absence of air contamination. These findings stem from a 12 recognition that the normal outside ion concentration of the 13 atmosphere is approximately five positive ions to four negative 14 ions. When this normal concentration is upset to contain an excess of positive ions, e.g. inside a building where the negative ions 16 are attracted by ground thereby depleting them or by atmospheric 17 conditions, living organisms experience an overall negative health 18 effect. Under these conditions, people tend to become lethargic 19 and complacent. However, an overdose of negative ions in the atmosphere tends to have the opposite effect on people-, raising 21 attentiveness and providing a general feeling of well-being.
22 Despite this, the prior art has not been successful in 23 providing a device which takes advantage of all of the benefits of 24 air ionization. Known air ionization systems are only capable of handling relatively small enclosed areas. Widespread industrial 26 use of such systems has not been achieved. In addition, prior art 27 devices have yet to reap the health benefits of generating high 28 concentrations of negative ions.
215392~
1 ~ Accordingly, there is a need in the art for an air ionization 2 device that is suitable for industrial uses. Such a device must 3 effectively prevent airborne particles from spreading about a 4 closed area, and at the same time require facile and ~nfrequent service. In addition, there is a need in the art for an air 6 ionization device which recognizes and reaps the benefits of 7 creating excess concentrations of negative ions without suffering 8 performance deviations as a result of contamination.
Objects of the Invention 11 Thus, it is an object of the present invention to provide a 12 air ionization device which is suitable for industrial use.
13 Another object of the present invention to provide a air 14 ionization device which meets the needs of large industrial areas.
Yet another object of the present invention is to provide an 16 air ionization device which prevents air cont~min~nts from becoming 17 airborne and spreading into sensitive areas of the system 18 electronics.
19 Still another object of the present invention is to provide an air ionization device which requires facile and i~frequent 21 service.
22 Still another object of the present invention is to provide 23 an air ionization device which generates an adjustable excess of 24 negative ions compared to positive ions thereby taking advantage of the health benefits associated with high negative ion 26 concentrations.
27 Still another object of the present invention is to provide 28 an air ionization device which generates a controlled amount of 21~3929 1 ~ ozone thereby taking advantage of the purifying qualities of 2 ozone.
3 These and other objects of the present invention will become 4 apparent from a review of the description provided below.
6 Summary of the Invention:
7 The present invention involves an air ionization system for 8 use in industrial, commercial or residential settings. In a 9 preferred embodiment, the system includes an ionization unit for providing positive and negative high voltage direct current output 11 to a plurality opposed pairs of ionization needle assemblies. The 12 positive high voltage direct current output of the ionization unit 13 is connected to a first number the opposed pairs ionization needle 14 assemblies, and the negative high voltage direct current output is connected to a second number of the opposed pairs of ionization 16 needle assemblies. Advantageously, the negative output of the unit 17 is connected to more pairs of ionization needle assemblies than the 18 positive output. In a preferred embodiment, the negative output 19 is connected to 80~ of the pairs of needles. This arrangement provides for an overall negative ionization effect. --21 The ionization needle assemblies preferably include an 22 insulating base section, a wire inserted into a bottom of the base 23 section, and a connector clip electrically fastened to a conductor 24 of the wire. The ionization needle is removably inserted into the connector clip and extends axially outward from the base section.
26 In addition, the system preferably includes said ozone 27 generation unit which includes a rectifier, e.g. a half-wave bridge 28 rectifier, for creating a high voltage negative direct current 29 output from an alternating current input. Ozone generation plates 215~929 1 are connected between the high voltage direct current output and 2 ground, and create negative ozone from air passing by the ozone 3 generation plates. This arrangement allows for the generation of 4 controlled negative ozone in addition the negative ~onization provided by the ionization unit.
6 In one embodiment, the ozone generation unit may include an 7 ozone cartridge adapted to receive the ozone generation plates.
8 The ozone cartridge includes at least one set of opposed slots for 9 removably receiving the ozone generation plate, and a terminal for electrically connecting the ozone generation plate with an output 11 of the ozone generation unit. A projection is preferably formed 12 on the ozone cartridge for receiving a connector attached to the 13 ozone generation plate to thereby removably fix the ozone 14 generation plate within the cartridge.
Another aspect of the invention involves a unique low voltage 16 control unit. The low voltage control unit includes a transformer 17 for creating a 12VDC output from an alternating current input. The 18 12VDC output is provided as an input to operate at least one 19 component of the system, e.g. a fan, through at least one 12VDC
relay. This allows for use of reliable, inexpensive, and generally 21 available automotive fans and relays in the system.
22 The system may also include a core designed to create a 23 Venturi effect for urging air outwardly from a middle section. The 24 core has an interior surface defining a first wide opening adjacent the front of the core, a narrow middle opening at a middle of the 26 core, and a second wide opening adjacent a back of the core. The 27 middle section provides a region of air pressure differential 28 compared to the first and second wide openings to thereby urge air 29 outwardly from the middle section. In a preferred embodiment, the 21a3329 1 core includes holes adjacent at least one of the ionization 2 needles. This allows the negative ozone to pass directly over at 3 least one ionization needle immediately as it enters the core 4 thereby cleaning cont~min~nts from the needles. -~
The core may also include at least one pair of opposed slots 6 formed in the core between the opposed pairs of ionization needle 7 assemblies. At least one percentage divider plate is adapted to 8 be removably received by the opposed slots for isolating a first 9 set of the opposed pairs of ionization needle asse~m~blies from a second set of the opposed pairs of ionization needle assemblies.
11 Preferably, the core also includes at least one set aligned 12 angled slots formed in a top and bottom of said core adjacent a 13 front of said core. The slots are adapted to receive an air 14 distribution fin for reducing turbulence created by air exiting the system from the front of the core.
16 The system also preferably includes a terminal strip for 17 connecting the 12VDC output of the low voltage control unit to at 18 least one additional air ionization system for operating at least 19 one component of said additional air ionization system. This allows for operation of the unit as a master unit to run additional 21 slave units. Preferably the master unit and the slave units share 22 a common control panel for controlling operation from a common 23 control.
24 Finally, a the system includes a purging system on the interior of the core for cleaning cont~min~nts from the interior 26 surfaces. The purging system includes at least one purging hose 27 connected to a compressed air source. The purging hose extends 28 into the core and is adapted to move within the core when 21a3~29 1 compressed air is forced through the purging hose to thereby clean 2 cont~min~nts from an interior surface of the core.
1 Brief Description of the Drawing:
2 A preferred embodiment of the invention is described below 3 with reference to the following figures wherein like numerals 4 represent like parts: ~
6FIG. 1: is a side sectional view of a preferred embodiment of an 7air ionization device according to the present invention.
9 FIG. 2: is a front partial sectional view of a preferred embodiment of an air ionization device according to the 11 present invention.
13 FIG. 3: is a block diagram of the system electronics for and 14 optional connections for additional slave devices for ionization device according to the present invention.
17 FIG. 4: is a block diagram of the main components of an ozone 18 generation unit for an ionization device according to the 19 present invention.
21 FIG. 5: is a front view of an ozone cartridge according to the 22 present invention.
24 FIG. 6: is a front view of an ozone generation plate for use in connection with an ozone cartridge according to the 26 present invention.
21~392~
1 _~FIG. 7: is a block diagram of the main components of an 2 ionization unit for an ionization device according to the 3 present invention.
4 ~
FIG. 8: is a front sectional view of an ionization needle 6 assembly for an air ionization device according to the 7 present invention.
21a3g~!~
1 Detailed Description of the Invention:
2 To facilitate detailed description of the invention, the 3 general operation of an air ionization device according to the 4 invention will first be described broadly with referen~e to its main constituent parts. A detailed explanation of the various 6 aspects of the invention will follow the broad operational 7 description.
8 Referring to FIGS. 1 and 2, a preferred air ionization device 9 according to the present invention comprises a core assembly 1 having a substantially rectangular exterior surface 2 and a 11 contoured interior surface 3. Mounted onto the core assembly are 12 electronics 4 for generating controlled negative ozone and for 13 ionizing air, negatively and positively, as it passes through the 14 core. Air is obtained from outside of the building through appropriate duct work 5 into the top of the device by action of a 16 fan 6 which also acts to cool the system electronics 4. Before 17 entering the core assembly, the outside air passes through a 18 washable filter 7 and into chamber 8 formed to the exterior surface 19 of the core and the device housing 25. The outside air enters the interior of the core assembly only after passing through and 21 between several ozone generation plates 9. These ozone generation 22 plates are charged at high voltages, e.g. -5000 VDC, by the ozone 23 generation electronics to modify the ion concentration of the 24 incoming outside air. Thus, a controlled negative ozone concentration is passed into the interior of the core assembly 26 through a distribution manifold 10 and exits through holes 11, 12 27 in the relatively low pressure narrow middle Venturi section 13 of 28 the core assembly.
1 ~ At the same time, inside air is drawn through the back of the 2 assembly 14 by preferably two fans 15. The inside air is forced 3 through the middle section 13 creating a Venturi action created by 4 the interior shape of the core and the force provided by-the fans.
As it passes through the middle section, the air moves between 6 several ion needle assemblies 16 mounted along the core at the top 7 and bottom of the middle section 13. These needle asse-m-blies 8 comprise a relatively fine needle conductor 17 mounted within an 9 insulated base. The needle conductors are charged at high voltages to controllably ionize air as it passes through the middle section.
11 After passing by the ionization needle assemblies 16, the 12 inside air is forced out of the device along with the controlled 13 ozone into the area to be treated by the system. As it passes out 14 of the cabinet, however, the ionized inside air and the controlled ozone is directed outwardly away from the cabinet by a section of 16 removable fanned fins 18. These fins are preferably of a solid 17 construction arranged in slots 19 defined on the surface 88 of the 18 core. By directing the air as it exits the cabinets, these fins 19 provide the valuable function of reducing air turbulence at the exterior of the cabinet. This prevents the possibi~ity that 21 particles or cont~min~nts which have settled near the front of the 22 cabinet will be stirred up by the exiting air and caused to settle 23 in another position.
24 Referring still to FIGS. 1 and 2, the design of the core assembly will now be discussed in further detail. The interior 26 surface 3 of the core assembly is designed to provide a Venturi 27 effect and defines a first relatively wide section 20 adjacent the 28 front 21 of the device which converges, preferably uniformly, to 29 a relatively narrow middle section 13. A second relatively wide 21~3929 1 _ section 22 adjacent the back 14 of the device also converges, 2 preferably uniformly, to the relatively narrow middle section 13.
3 The relatively narrow middle section 13 provides a region of 4 low air pressure compared to the relatively wide section~ 20,22 at the front and back of the device. In view of low air pressure 6 present in the middle section 13, air which is present inside the 7 device is urged outwardly toward regions of higher pressure at the 8 exterior of the device. Accordingly, there is a beneficial Venturi 9 effect creating a tendency for any air which enters the cabinet through the top to exit the cabinet and combine with the air in the 11 room.
12 The core assembly is preferably molded using fiberglass and 13 is of unitary construction. In the preferred embodiment, the core 14 assembly has a rectangular exterior shape with solid ends 23,24 for supporting a stainless steel housing 25. In addition, an undercut 16 26 is formed at the top sides and bottom of the core front for 17 mounting a grill 27. The grill 27 is provided for preventing 18 foreign objects from entering the interior of the device while 19 allowing free passage of air, and for preventing inadvertent contact with the high voltage needle assemblies which could cause 21 injury.
22 Various holes are formed on the interior surface of the core 23 to allow for appropriate air flow. Referring to FIG. 1., holes 11, 24 12 are located on either side of each ionization needle at the top of the middle section. The holes 11,12 allow for the controlled 26 ozone to pass from the ozone distribution manifold 10 into the 27 interior of the core. Advantageously, one of the holes 11 is 28 located directly behind each ionization needle assembly 16. This 1 _ configuration allows for constant purging of the ion needle 2 assemblies 16.
3 Another set of holes 28, 29 are at the bottom of the interior 4 surface of the core. These holes are preferably space~ from the ionization needles and are provided to allow air flow out of the 6 bottom chamber 30 defined by the core and the housing 25. This 7 allows for cooling of the system electronics by dissipation of 8 generated heat, and constant purging of the bottom ion needle 9 assemblies 16.
Another feature of the core assembly is the incorporation of 11 a purging system 31. The purging system is defined by preferably 12 two dimples 32, 33 formed on the sides of the core, one on each 13 side. Each dimple has a center bore (not shown) to the exterior 14 of the housing through which a small purging hose 34 is inserted.
Preferably, the purging hose extends about 4" into the interior of 16 the core and is about 0.25" in diameter. Periodic cleaning of 17 cont~m;n~nts from the interior surface of the device is achieved 18 by forcing compressed air through the purging hoses 34. The 19 compressed air can be derived from an external commercial compressor or through a bottled air source (not shown).-21 As the compressed air is forced through the hoses, the 22 flexible purging hoses 34 are forced into rapid random movement 23 against the interior of the core. This action, combined with the 24 compressed air exiting from the ends of the purging hoses, causes the hoses to strike against the interior of the core thereby 26 loosening cont~m;n~nts and blowing them from the interior surface 27 of the core. Once the cont~m;n~nts are loosened from the core 28 surfaces, they are blown out of the assembly by the system fans and 29 ultimately settle on the floor.
21a3929 1 _ Turning now to FIG. 3, the major components of the system2 electronics 4 will now be discussed in general terms with a more 3 detailed description to follow. Generally, the device utilizes a 4 110 VAC input for operating three main units; an ionization unit 36, an ozone generation unit 37, and a low voltage control unit 38.
6 The heart of the electronics comprises a low voltage control unit 7 38.
8 Through the operation of appropriate transformers, the 110 VAC
9 input 35 iS rectified in the low voltage unit to provide a +/- 12 10 VDC output. The 12VDC output is used to operate the system fans 11 6, 15 as well as the purging systems 31. This provides the 12 significant advantage of making possible the use of generally 13 available reliable automotive fans and relays. Since automotive 14 equipment is made to withstand severe conditions and is readily 15 available at relatively low prices, provision of 12 VDC in the low 16 voltage control unit makes the overall system more reliable at a 17 reduced expense. In addition, other advantages are achieved which 18 are directly related to the capacity to use automotive products, 19 e.g. replacement parts are readily available, and fan speed can be 2 0 easily adjusted. --21 In addition to generating a 12VDC power source, the low 22 voltage control unit routes the 110 VAC input to the other main 23 system components, the ozone generation unit 37 and the ionization 24 unit 36, the system fans 15,16, the purging systems 31. This routing is accomplished using 12VDC relays within the low voltage 26 control unit. These relays are connected to a system control panel 27 44 which allows for selective control of power to the system 2 8 components.
1 _ Advantageously, the a twelve pole terminal strip 43 is also 2 provided which facilitates connection of up to four additional 3 ionization systems 49,50,51,52. Thus, the system has the 4 capability for accommodating large industrial areas since up to five air ionization units according to the invention may be 6 operated in simultaneous fashion. To accomplish this, the 7 appropriate control panel switches are connected, through the 8 terminal strip 43, to unit control modules 45,46,47,48 in each of 9 the four additional units 49,50,51,52. Each unit control module contains six 12VDC relays for selectively operating the system 11 components of the ionization system in which it resides through the 12 control panel 44.
13 A complete five unit system can operate on a single 20 amp 14 service as each unit only requires about 2.75 amps to operate. The relays of low voltage control system are preferably wired to a the 16 control panel by simple multi-wire telephone cables 53,54. The 17 control panel controls ion and ozone generation, fan speed, the 18 purging unit, the ion output, and the power to all of the connected 19 units. Thus, when an adjustment is made on this control panel, all units on the system meet to that adjustment.
21 Turning now to FIG. 4, the main components of a preferred 22 ozone generation unit 37 according to the invention includes high 23 voltage transformers 55, 56 and two half-wave bridge rectifiers 57, 24 58. The llOVAC input from the low voltage control module transformed via transformers to 5000 VAC and then rectified by half 26 wave rectifiers 57,58 to provide a -5000 VDC output. The -5000 VDC
27 output of each rectifier 57,58 is provided as an input to the ozone 28 generation cartridges 59,60 which each contain preferably 3 ozone 29 generation plates 9 for generating negative ozone.
2153~29 1 As discussed above, ozone generation has been known for 2 decades, yet no ozone generation system has yet been designed for 3 taking advantage of the beneficial effects of outside filtered air, 4 negative ions and negative ozone. By providing aerectified negative high voltage to the ozone generation plates, however, an 6 ionization system according to the present invention reaps these 7 benefits.
8 Another advantage of the present invention can be seen clearly 9 with reference to FIG. 5 which shows the construction of an ozone cartridge 59 according to the present invention. Each ozone 11 cartridge 59 is preferably unitary construction formed from an 12 insulating material such as Lexan. The cartridge is preferably 13 square including two walls 60,61, and a top 62 and bottom and 63.
14 The inner surfaces of the top 62 and bottom 63 of the cartridges have three sets of opposing grooves 64,65 formed therein for 16 receiving up to three ozone generation plates 9.
17 Referring also to FIG. 6, the ozone generation plates are 18 inserted into the grooves 64,65. Each plate 9 comprises a .030"
19 ceramic plate onto which a 10-mesh, .025" wire stainless steel mesh 67 is fixed using an epoxy. Attached to the top and bottom of each 21 plate are spot welded connectors 68, 69 which serve to fix the 22 plate within the ozone cartridge 59 and also serve to provide 23 communication between the terminal strips on the top 71 and bottom 24 (bottom strip not shown) of ozone cartridge 59 and the stainless steel mesh 67 of each ozone plate 9. The connector 68 at the top 26 of the cartridge is fixed to a steel band 70 which is in direct 27 electrical communication with the steel mesh 67. The connector 69 28 at the bottom of each ozone plate is ultimately connected to a 29 system ground 72 as is shown in FIG. 4.
1 As the ozone plates 9 are slid into the opposing grooves 64, 2 65 of the ozone cartridge, the connectors 68,69 engage inward 3 projections 73 formed into the top and bottom of the cartridge.
4 Once fully inserted, the plates are in direct ~lectrical communication with the terminal strips 71 to thereby facilitate 6 connection of the -5000 VDC to the top of the plate through 7 connector 68, and a ground connection to the bottom of the plate 8 through connector 69.
9 This ozone cartridge construction provides a significant advantage in terms of servicing the overall ionization system. It 11 is commonly known that the high voltages at which the ozone 12 generation unit operates tend to cause deterioration of the plates 13 and associated components. In conventional designs the plates 14 were difficult to remove and the process was time consuming.
However, according to the present invention, the plates may be 16 easily inserted and removed from the cartridges for servicing or 17 replacement.
18 Referring now to FIG. 7, the main components of an ionization 19 unit 36 according to the present invention will now be discussed.
The 110 VAC input 35 provided to the ionization unit through the 21 low voltage control module 38 (FIG. 3) is connected to a 10,000 VAC
22 transformer 74 through a 500 ohm/100 watt resistor 75. The output 23 of the transformer 74 preferably at 5000 VAC and is provided as the 24 input to a common multiplier/rectifier circuit 76 across a spark gap 77. The spark gap is provided instead of a direct connection 26 to allow for visual verification that the high voltage output is 27 present and to prevent the multiplier 76 from feeding back into the 28 transformer 74 and burning it out.
1 ~_ The multiplier 76 provides a DC output in the range from about 2 +/- 50,000-80,000 VDC. The high voltage DC output of the 3 multiplier is connected directly to the opposing pairs ionization 4 needle assemblies 16 for ionizing air as it passes throug~ the core of the device. In order to take advantage of the health benefits 6 of providing an excess of negative ions for air purification, the 7 positive output 78 of the multiplier is preferably connected to 8 fewer needle assemblies 9 than is the negative output 79. In the 9 preferred embodiment the negative output 79 is connected to 80~ of the needle assemblies while the positive output is connected to 20~
11 of the needle assemblies. This distribution, however, can be 12 modified to provide any proportion of positively to negatively 13 charged needle assemblies.
14 Turning again to FIG. 2, the core assembly includes divider plate slots 80 spaced between opposing pairs of needle assemblies 16 16. These slots 80 are adapted to receive a percentage divider 17 plate 81 which is inserted into the core for purposes of separating 18 the negatively charged needle assemblies from the positively 19 charged needle assemblies. In the arrangement of FIG. 2, the divider plate separates four opposing pairs of needle assemblies 21 which are preferably negatively charged from one opposing pair of 22 needle assemblies which are preferably positively charged.
23 By separating the needle assemblies in this fashion, 24 negatively ionized air is prevented from combining with positively ionized air within the core assembly. Instead, the negative and 26 positive ions are forced out of the device and fanned out into the 27 room by the fins 18. Thus, the ionized air is allowed to combine 28 with cont~min~nts in the room thereby purifying the air within the 29 room.
1 _A preferred embodiment of an ionization needle assembly 16 is 2shown in FIG. 8. The assembly 16 preferably includes a cylindrical 3ceramic base section 82 into which an insulator sleeve is inserted 483. A high voltage wire 84, e.g. copper core spark pl~g wire is 5inserted into one end of the assembly and connects the assembly to 6an output 78, 79 of the multiplier 76. A stainless steel connector 7clip 85 is electrically connected to the conductor of the wire 84 8and a stainless steel ionization needle 17 is inserted into the 9connector clip 85 thereby electrically connecting the needle 17 to 10an output 78, 79 of the multiplier. Finally an insulating layer 1186 of silicon rubber is inserted over the needle and connector clip 12to maintain the needle concentric with the ceramic base section 82.
13Advantageously, the arrangement of FIG. 8 allows for facile 14servicing of the ionization needles which tend to require periodic 15replacement. With this arrangement, then ionization needle 17 can 16 be removed from the assembly by simply pulling it loose from the 17 connector clip 86. A new needle 17 can then be inserted into the 18 connector clip 86 by inserting it through a hole left by the 19 previous needle in the silicon layer 86.
Thus, according to the present invention there is pEovided an 21 air ionization system which is adapted to reap the benefits of 22 providing controlled ionization and controlled negative ozone for 23 purifying the air within a large industrial space. The device 24 according to the invention contains several features which allow for the facile servicing and reliable operation required of 26 industrial use. The embodiments which have been described herein, 27 however, are but some of the several which utilize this invention 28 and are set forth here by way of illustration but not of 29 limitation. It is obvious that many other embodiments which will 215392~
1 ~e readily apparent to those skilled in the art may be made without 2 departing materially from the spirit and scope of this invention.
12 In other commercial settings such as restaurants, hotels, 13 gymnasiums, etc., the prime concern is with the odors resulting 14 from various activities and from the release of various sprays, chemicals, weldings, or burnings in an enclosed area. Unpleasant 16 odors are, obviously, not conducive to promoting customer 17 satisfaction or employee well-being. For the same reasons 18 discussed above, air filtration systems have not produced 19 satisfactory results in eliminating odors in these settings. Thus, there has long been a need in industrial and commercial settings 21 for an air purification system which would eliminate particles and 22 odors without transporting them through sensitive areas to be 23 filtered.
24 Residential air filtration systems naturally suffer from the same disadvantages. Accordingly, in recent years various air 26 ionization devices have been developed for residential use. Air 27 purification by ionization is an old concept which has only 28 recently gained deserved attention. Residential air ionization 29 systems are designed to negatively ionize contaminated air so that 1 __it will attract electrically positively charged cont~min~nts 2 thereby causing these cont~min~nts attach to each other in mid-air 3 and drop to the floor. In theory, by spreading a constant stream 4 of negatively ionized air combined with a smaller per~entage of positively ionized air over a room, undesirable particles are 6 effectively prevented from becoming airborne at their source.
7 Thus, these particles are never transported into areas where they 8 can cause damage or discomfort.
9 In addition, recent studies indicate that air ionization devices can actually have a beneficial effect even in the total 11 absence of air contamination. These findings stem from a 12 recognition that the normal outside ion concentration of the 13 atmosphere is approximately five positive ions to four negative 14 ions. When this normal concentration is upset to contain an excess of positive ions, e.g. inside a building where the negative ions 16 are attracted by ground thereby depleting them or by atmospheric 17 conditions, living organisms experience an overall negative health 18 effect. Under these conditions, people tend to become lethargic 19 and complacent. However, an overdose of negative ions in the atmosphere tends to have the opposite effect on people-, raising 21 attentiveness and providing a general feeling of well-being.
22 Despite this, the prior art has not been successful in 23 providing a device which takes advantage of all of the benefits of 24 air ionization. Known air ionization systems are only capable of handling relatively small enclosed areas. Widespread industrial 26 use of such systems has not been achieved. In addition, prior art 27 devices have yet to reap the health benefits of generating high 28 concentrations of negative ions.
215392~
1 ~ Accordingly, there is a need in the art for an air ionization 2 device that is suitable for industrial uses. Such a device must 3 effectively prevent airborne particles from spreading about a 4 closed area, and at the same time require facile and ~nfrequent service. In addition, there is a need in the art for an air 6 ionization device which recognizes and reaps the benefits of 7 creating excess concentrations of negative ions without suffering 8 performance deviations as a result of contamination.
Objects of the Invention 11 Thus, it is an object of the present invention to provide a 12 air ionization device which is suitable for industrial use.
13 Another object of the present invention to provide a air 14 ionization device which meets the needs of large industrial areas.
Yet another object of the present invention is to provide an 16 air ionization device which prevents air cont~min~nts from becoming 17 airborne and spreading into sensitive areas of the system 18 electronics.
19 Still another object of the present invention is to provide an air ionization device which requires facile and i~frequent 21 service.
22 Still another object of the present invention is to provide 23 an air ionization device which generates an adjustable excess of 24 negative ions compared to positive ions thereby taking advantage of the health benefits associated with high negative ion 26 concentrations.
27 Still another object of the present invention is to provide 28 an air ionization device which generates a controlled amount of 21~3929 1 ~ ozone thereby taking advantage of the purifying qualities of 2 ozone.
3 These and other objects of the present invention will become 4 apparent from a review of the description provided below.
6 Summary of the Invention:
7 The present invention involves an air ionization system for 8 use in industrial, commercial or residential settings. In a 9 preferred embodiment, the system includes an ionization unit for providing positive and negative high voltage direct current output 11 to a plurality opposed pairs of ionization needle assemblies. The 12 positive high voltage direct current output of the ionization unit 13 is connected to a first number the opposed pairs ionization needle 14 assemblies, and the negative high voltage direct current output is connected to a second number of the opposed pairs of ionization 16 needle assemblies. Advantageously, the negative output of the unit 17 is connected to more pairs of ionization needle assemblies than the 18 positive output. In a preferred embodiment, the negative output 19 is connected to 80~ of the pairs of needles. This arrangement provides for an overall negative ionization effect. --21 The ionization needle assemblies preferably include an 22 insulating base section, a wire inserted into a bottom of the base 23 section, and a connector clip electrically fastened to a conductor 24 of the wire. The ionization needle is removably inserted into the connector clip and extends axially outward from the base section.
26 In addition, the system preferably includes said ozone 27 generation unit which includes a rectifier, e.g. a half-wave bridge 28 rectifier, for creating a high voltage negative direct current 29 output from an alternating current input. Ozone generation plates 215~929 1 are connected between the high voltage direct current output and 2 ground, and create negative ozone from air passing by the ozone 3 generation plates. This arrangement allows for the generation of 4 controlled negative ozone in addition the negative ~onization provided by the ionization unit.
6 In one embodiment, the ozone generation unit may include an 7 ozone cartridge adapted to receive the ozone generation plates.
8 The ozone cartridge includes at least one set of opposed slots for 9 removably receiving the ozone generation plate, and a terminal for electrically connecting the ozone generation plate with an output 11 of the ozone generation unit. A projection is preferably formed 12 on the ozone cartridge for receiving a connector attached to the 13 ozone generation plate to thereby removably fix the ozone 14 generation plate within the cartridge.
Another aspect of the invention involves a unique low voltage 16 control unit. The low voltage control unit includes a transformer 17 for creating a 12VDC output from an alternating current input. The 18 12VDC output is provided as an input to operate at least one 19 component of the system, e.g. a fan, through at least one 12VDC
relay. This allows for use of reliable, inexpensive, and generally 21 available automotive fans and relays in the system.
22 The system may also include a core designed to create a 23 Venturi effect for urging air outwardly from a middle section. The 24 core has an interior surface defining a first wide opening adjacent the front of the core, a narrow middle opening at a middle of the 26 core, and a second wide opening adjacent a back of the core. The 27 middle section provides a region of air pressure differential 28 compared to the first and second wide openings to thereby urge air 29 outwardly from the middle section. In a preferred embodiment, the 21a3329 1 core includes holes adjacent at least one of the ionization 2 needles. This allows the negative ozone to pass directly over at 3 least one ionization needle immediately as it enters the core 4 thereby cleaning cont~min~nts from the needles. -~
The core may also include at least one pair of opposed slots 6 formed in the core between the opposed pairs of ionization needle 7 assemblies. At least one percentage divider plate is adapted to 8 be removably received by the opposed slots for isolating a first 9 set of the opposed pairs of ionization needle asse~m~blies from a second set of the opposed pairs of ionization needle assemblies.
11 Preferably, the core also includes at least one set aligned 12 angled slots formed in a top and bottom of said core adjacent a 13 front of said core. The slots are adapted to receive an air 14 distribution fin for reducing turbulence created by air exiting the system from the front of the core.
16 The system also preferably includes a terminal strip for 17 connecting the 12VDC output of the low voltage control unit to at 18 least one additional air ionization system for operating at least 19 one component of said additional air ionization system. This allows for operation of the unit as a master unit to run additional 21 slave units. Preferably the master unit and the slave units share 22 a common control panel for controlling operation from a common 23 control.
24 Finally, a the system includes a purging system on the interior of the core for cleaning cont~min~nts from the interior 26 surfaces. The purging system includes at least one purging hose 27 connected to a compressed air source. The purging hose extends 28 into the core and is adapted to move within the core when 21a3~29 1 compressed air is forced through the purging hose to thereby clean 2 cont~min~nts from an interior surface of the core.
1 Brief Description of the Drawing:
2 A preferred embodiment of the invention is described below 3 with reference to the following figures wherein like numerals 4 represent like parts: ~
6FIG. 1: is a side sectional view of a preferred embodiment of an 7air ionization device according to the present invention.
9 FIG. 2: is a front partial sectional view of a preferred embodiment of an air ionization device according to the 11 present invention.
13 FIG. 3: is a block diagram of the system electronics for and 14 optional connections for additional slave devices for ionization device according to the present invention.
17 FIG. 4: is a block diagram of the main components of an ozone 18 generation unit for an ionization device according to the 19 present invention.
21 FIG. 5: is a front view of an ozone cartridge according to the 22 present invention.
24 FIG. 6: is a front view of an ozone generation plate for use in connection with an ozone cartridge according to the 26 present invention.
21~392~
1 _~FIG. 7: is a block diagram of the main components of an 2 ionization unit for an ionization device according to the 3 present invention.
4 ~
FIG. 8: is a front sectional view of an ionization needle 6 assembly for an air ionization device according to the 7 present invention.
21a3g~!~
1 Detailed Description of the Invention:
2 To facilitate detailed description of the invention, the 3 general operation of an air ionization device according to the 4 invention will first be described broadly with referen~e to its main constituent parts. A detailed explanation of the various 6 aspects of the invention will follow the broad operational 7 description.
8 Referring to FIGS. 1 and 2, a preferred air ionization device 9 according to the present invention comprises a core assembly 1 having a substantially rectangular exterior surface 2 and a 11 contoured interior surface 3. Mounted onto the core assembly are 12 electronics 4 for generating controlled negative ozone and for 13 ionizing air, negatively and positively, as it passes through the 14 core. Air is obtained from outside of the building through appropriate duct work 5 into the top of the device by action of a 16 fan 6 which also acts to cool the system electronics 4. Before 17 entering the core assembly, the outside air passes through a 18 washable filter 7 and into chamber 8 formed to the exterior surface 19 of the core and the device housing 25. The outside air enters the interior of the core assembly only after passing through and 21 between several ozone generation plates 9. These ozone generation 22 plates are charged at high voltages, e.g. -5000 VDC, by the ozone 23 generation electronics to modify the ion concentration of the 24 incoming outside air. Thus, a controlled negative ozone concentration is passed into the interior of the core assembly 26 through a distribution manifold 10 and exits through holes 11, 12 27 in the relatively low pressure narrow middle Venturi section 13 of 28 the core assembly.
1 ~ At the same time, inside air is drawn through the back of the 2 assembly 14 by preferably two fans 15. The inside air is forced 3 through the middle section 13 creating a Venturi action created by 4 the interior shape of the core and the force provided by-the fans.
As it passes through the middle section, the air moves between 6 several ion needle assemblies 16 mounted along the core at the top 7 and bottom of the middle section 13. These needle asse-m-blies 8 comprise a relatively fine needle conductor 17 mounted within an 9 insulated base. The needle conductors are charged at high voltages to controllably ionize air as it passes through the middle section.
11 After passing by the ionization needle assemblies 16, the 12 inside air is forced out of the device along with the controlled 13 ozone into the area to be treated by the system. As it passes out 14 of the cabinet, however, the ionized inside air and the controlled ozone is directed outwardly away from the cabinet by a section of 16 removable fanned fins 18. These fins are preferably of a solid 17 construction arranged in slots 19 defined on the surface 88 of the 18 core. By directing the air as it exits the cabinets, these fins 19 provide the valuable function of reducing air turbulence at the exterior of the cabinet. This prevents the possibi~ity that 21 particles or cont~min~nts which have settled near the front of the 22 cabinet will be stirred up by the exiting air and caused to settle 23 in another position.
24 Referring still to FIGS. 1 and 2, the design of the core assembly will now be discussed in further detail. The interior 26 surface 3 of the core assembly is designed to provide a Venturi 27 effect and defines a first relatively wide section 20 adjacent the 28 front 21 of the device which converges, preferably uniformly, to 29 a relatively narrow middle section 13. A second relatively wide 21~3929 1 _ section 22 adjacent the back 14 of the device also converges, 2 preferably uniformly, to the relatively narrow middle section 13.
3 The relatively narrow middle section 13 provides a region of 4 low air pressure compared to the relatively wide section~ 20,22 at the front and back of the device. In view of low air pressure 6 present in the middle section 13, air which is present inside the 7 device is urged outwardly toward regions of higher pressure at the 8 exterior of the device. Accordingly, there is a beneficial Venturi 9 effect creating a tendency for any air which enters the cabinet through the top to exit the cabinet and combine with the air in the 11 room.
12 The core assembly is preferably molded using fiberglass and 13 is of unitary construction. In the preferred embodiment, the core 14 assembly has a rectangular exterior shape with solid ends 23,24 for supporting a stainless steel housing 25. In addition, an undercut 16 26 is formed at the top sides and bottom of the core front for 17 mounting a grill 27. The grill 27 is provided for preventing 18 foreign objects from entering the interior of the device while 19 allowing free passage of air, and for preventing inadvertent contact with the high voltage needle assemblies which could cause 21 injury.
22 Various holes are formed on the interior surface of the core 23 to allow for appropriate air flow. Referring to FIG. 1., holes 11, 24 12 are located on either side of each ionization needle at the top of the middle section. The holes 11,12 allow for the controlled 26 ozone to pass from the ozone distribution manifold 10 into the 27 interior of the core. Advantageously, one of the holes 11 is 28 located directly behind each ionization needle assembly 16. This 1 _ configuration allows for constant purging of the ion needle 2 assemblies 16.
3 Another set of holes 28, 29 are at the bottom of the interior 4 surface of the core. These holes are preferably space~ from the ionization needles and are provided to allow air flow out of the 6 bottom chamber 30 defined by the core and the housing 25. This 7 allows for cooling of the system electronics by dissipation of 8 generated heat, and constant purging of the bottom ion needle 9 assemblies 16.
Another feature of the core assembly is the incorporation of 11 a purging system 31. The purging system is defined by preferably 12 two dimples 32, 33 formed on the sides of the core, one on each 13 side. Each dimple has a center bore (not shown) to the exterior 14 of the housing through which a small purging hose 34 is inserted.
Preferably, the purging hose extends about 4" into the interior of 16 the core and is about 0.25" in diameter. Periodic cleaning of 17 cont~m;n~nts from the interior surface of the device is achieved 18 by forcing compressed air through the purging hoses 34. The 19 compressed air can be derived from an external commercial compressor or through a bottled air source (not shown).-21 As the compressed air is forced through the hoses, the 22 flexible purging hoses 34 are forced into rapid random movement 23 against the interior of the core. This action, combined with the 24 compressed air exiting from the ends of the purging hoses, causes the hoses to strike against the interior of the core thereby 26 loosening cont~m;n~nts and blowing them from the interior surface 27 of the core. Once the cont~m;n~nts are loosened from the core 28 surfaces, they are blown out of the assembly by the system fans and 29 ultimately settle on the floor.
21a3929 1 _ Turning now to FIG. 3, the major components of the system2 electronics 4 will now be discussed in general terms with a more 3 detailed description to follow. Generally, the device utilizes a 4 110 VAC input for operating three main units; an ionization unit 36, an ozone generation unit 37, and a low voltage control unit 38.
6 The heart of the electronics comprises a low voltage control unit 7 38.
8 Through the operation of appropriate transformers, the 110 VAC
9 input 35 iS rectified in the low voltage unit to provide a +/- 12 10 VDC output. The 12VDC output is used to operate the system fans 11 6, 15 as well as the purging systems 31. This provides the 12 significant advantage of making possible the use of generally 13 available reliable automotive fans and relays. Since automotive 14 equipment is made to withstand severe conditions and is readily 15 available at relatively low prices, provision of 12 VDC in the low 16 voltage control unit makes the overall system more reliable at a 17 reduced expense. In addition, other advantages are achieved which 18 are directly related to the capacity to use automotive products, 19 e.g. replacement parts are readily available, and fan speed can be 2 0 easily adjusted. --21 In addition to generating a 12VDC power source, the low 22 voltage control unit routes the 110 VAC input to the other main 23 system components, the ozone generation unit 37 and the ionization 24 unit 36, the system fans 15,16, the purging systems 31. This routing is accomplished using 12VDC relays within the low voltage 26 control unit. These relays are connected to a system control panel 27 44 which allows for selective control of power to the system 2 8 components.
1 _ Advantageously, the a twelve pole terminal strip 43 is also 2 provided which facilitates connection of up to four additional 3 ionization systems 49,50,51,52. Thus, the system has the 4 capability for accommodating large industrial areas since up to five air ionization units according to the invention may be 6 operated in simultaneous fashion. To accomplish this, the 7 appropriate control panel switches are connected, through the 8 terminal strip 43, to unit control modules 45,46,47,48 in each of 9 the four additional units 49,50,51,52. Each unit control module contains six 12VDC relays for selectively operating the system 11 components of the ionization system in which it resides through the 12 control panel 44.
13 A complete five unit system can operate on a single 20 amp 14 service as each unit only requires about 2.75 amps to operate. The relays of low voltage control system are preferably wired to a the 16 control panel by simple multi-wire telephone cables 53,54. The 17 control panel controls ion and ozone generation, fan speed, the 18 purging unit, the ion output, and the power to all of the connected 19 units. Thus, when an adjustment is made on this control panel, all units on the system meet to that adjustment.
21 Turning now to FIG. 4, the main components of a preferred 22 ozone generation unit 37 according to the invention includes high 23 voltage transformers 55, 56 and two half-wave bridge rectifiers 57, 24 58. The llOVAC input from the low voltage control module transformed via transformers to 5000 VAC and then rectified by half 26 wave rectifiers 57,58 to provide a -5000 VDC output. The -5000 VDC
27 output of each rectifier 57,58 is provided as an input to the ozone 28 generation cartridges 59,60 which each contain preferably 3 ozone 29 generation plates 9 for generating negative ozone.
2153~29 1 As discussed above, ozone generation has been known for 2 decades, yet no ozone generation system has yet been designed for 3 taking advantage of the beneficial effects of outside filtered air, 4 negative ions and negative ozone. By providing aerectified negative high voltage to the ozone generation plates, however, an 6 ionization system according to the present invention reaps these 7 benefits.
8 Another advantage of the present invention can be seen clearly 9 with reference to FIG. 5 which shows the construction of an ozone cartridge 59 according to the present invention. Each ozone 11 cartridge 59 is preferably unitary construction formed from an 12 insulating material such as Lexan. The cartridge is preferably 13 square including two walls 60,61, and a top 62 and bottom and 63.
14 The inner surfaces of the top 62 and bottom 63 of the cartridges have three sets of opposing grooves 64,65 formed therein for 16 receiving up to three ozone generation plates 9.
17 Referring also to FIG. 6, the ozone generation plates are 18 inserted into the grooves 64,65. Each plate 9 comprises a .030"
19 ceramic plate onto which a 10-mesh, .025" wire stainless steel mesh 67 is fixed using an epoxy. Attached to the top and bottom of each 21 plate are spot welded connectors 68, 69 which serve to fix the 22 plate within the ozone cartridge 59 and also serve to provide 23 communication between the terminal strips on the top 71 and bottom 24 (bottom strip not shown) of ozone cartridge 59 and the stainless steel mesh 67 of each ozone plate 9. The connector 68 at the top 26 of the cartridge is fixed to a steel band 70 which is in direct 27 electrical communication with the steel mesh 67. The connector 69 28 at the bottom of each ozone plate is ultimately connected to a 29 system ground 72 as is shown in FIG. 4.
1 As the ozone plates 9 are slid into the opposing grooves 64, 2 65 of the ozone cartridge, the connectors 68,69 engage inward 3 projections 73 formed into the top and bottom of the cartridge.
4 Once fully inserted, the plates are in direct ~lectrical communication with the terminal strips 71 to thereby facilitate 6 connection of the -5000 VDC to the top of the plate through 7 connector 68, and a ground connection to the bottom of the plate 8 through connector 69.
9 This ozone cartridge construction provides a significant advantage in terms of servicing the overall ionization system. It 11 is commonly known that the high voltages at which the ozone 12 generation unit operates tend to cause deterioration of the plates 13 and associated components. In conventional designs the plates 14 were difficult to remove and the process was time consuming.
However, according to the present invention, the plates may be 16 easily inserted and removed from the cartridges for servicing or 17 replacement.
18 Referring now to FIG. 7, the main components of an ionization 19 unit 36 according to the present invention will now be discussed.
The 110 VAC input 35 provided to the ionization unit through the 21 low voltage control module 38 (FIG. 3) is connected to a 10,000 VAC
22 transformer 74 through a 500 ohm/100 watt resistor 75. The output 23 of the transformer 74 preferably at 5000 VAC and is provided as the 24 input to a common multiplier/rectifier circuit 76 across a spark gap 77. The spark gap is provided instead of a direct connection 26 to allow for visual verification that the high voltage output is 27 present and to prevent the multiplier 76 from feeding back into the 28 transformer 74 and burning it out.
1 ~_ The multiplier 76 provides a DC output in the range from about 2 +/- 50,000-80,000 VDC. The high voltage DC output of the 3 multiplier is connected directly to the opposing pairs ionization 4 needle assemblies 16 for ionizing air as it passes throug~ the core of the device. In order to take advantage of the health benefits 6 of providing an excess of negative ions for air purification, the 7 positive output 78 of the multiplier is preferably connected to 8 fewer needle assemblies 9 than is the negative output 79. In the 9 preferred embodiment the negative output 79 is connected to 80~ of the needle assemblies while the positive output is connected to 20~
11 of the needle assemblies. This distribution, however, can be 12 modified to provide any proportion of positively to negatively 13 charged needle assemblies.
14 Turning again to FIG. 2, the core assembly includes divider plate slots 80 spaced between opposing pairs of needle assemblies 16 16. These slots 80 are adapted to receive a percentage divider 17 plate 81 which is inserted into the core for purposes of separating 18 the negatively charged needle assemblies from the positively 19 charged needle assemblies. In the arrangement of FIG. 2, the divider plate separates four opposing pairs of needle assemblies 21 which are preferably negatively charged from one opposing pair of 22 needle assemblies which are preferably positively charged.
23 By separating the needle assemblies in this fashion, 24 negatively ionized air is prevented from combining with positively ionized air within the core assembly. Instead, the negative and 26 positive ions are forced out of the device and fanned out into the 27 room by the fins 18. Thus, the ionized air is allowed to combine 28 with cont~min~nts in the room thereby purifying the air within the 29 room.
1 _A preferred embodiment of an ionization needle assembly 16 is 2shown in FIG. 8. The assembly 16 preferably includes a cylindrical 3ceramic base section 82 into which an insulator sleeve is inserted 483. A high voltage wire 84, e.g. copper core spark pl~g wire is 5inserted into one end of the assembly and connects the assembly to 6an output 78, 79 of the multiplier 76. A stainless steel connector 7clip 85 is electrically connected to the conductor of the wire 84 8and a stainless steel ionization needle 17 is inserted into the 9connector clip 85 thereby electrically connecting the needle 17 to 10an output 78, 79 of the multiplier. Finally an insulating layer 1186 of silicon rubber is inserted over the needle and connector clip 12to maintain the needle concentric with the ceramic base section 82.
13Advantageously, the arrangement of FIG. 8 allows for facile 14servicing of the ionization needles which tend to require periodic 15replacement. With this arrangement, then ionization needle 17 can 16 be removed from the assembly by simply pulling it loose from the 17 connector clip 86. A new needle 17 can then be inserted into the 18 connector clip 86 by inserting it through a hole left by the 19 previous needle in the silicon layer 86.
Thus, according to the present invention there is pEovided an 21 air ionization system which is adapted to reap the benefits of 22 providing controlled ionization and controlled negative ozone for 23 purifying the air within a large industrial space. The device 24 according to the invention contains several features which allow for the facile servicing and reliable operation required of 26 industrial use. The embodiments which have been described herein, 27 however, are but some of the several which utilize this invention 28 and are set forth here by way of illustration but not of 29 limitation. It is obvious that many other embodiments which will 215392~
1 ~e readily apparent to those skilled in the art may be made without 2 departing materially from the spirit and scope of this invention.
Claims (25)
1. An air ionization system comprising:
an ionization unit, said ionization unit providing positive and negative high voltage direct current output to a plurality opposed pairs of ionization needle assemblies, said positive high voltage direct current output being connected to a first number said opposed pairs ionization needle assemblies, and said negative high voltage direct current output being connected to a second number of said opposed pairs of ionization needle assemblies, said second number being greater than said first number; and an ozone generation unit, said ozone generation unit comprising a rectifier for creating a high voltage negative direct current output from an alternating current input; and at least one ozone generation plate connected between said high voltage direct current output and ground, said ozone generation plate creating negative ozone from air passing by said ozone generation plate.
an ionization unit, said ionization unit providing positive and negative high voltage direct current output to a plurality opposed pairs of ionization needle assemblies, said positive high voltage direct current output being connected to a first number said opposed pairs ionization needle assemblies, and said negative high voltage direct current output being connected to a second number of said opposed pairs of ionization needle assemblies, said second number being greater than said first number; and an ozone generation unit, said ozone generation unit comprising a rectifier for creating a high voltage negative direct current output from an alternating current input; and at least one ozone generation plate connected between said high voltage direct current output and ground, said ozone generation plate creating negative ozone from air passing by said ozone generation plate.
2. An air ionization according to claim 1, said system further comprising:
a low voltage control unit, said low voltage control unit comprising a transformer for creating a 12VDC output from an alternating current input, said 12VDC output being provided as an input to operate at least one component of said air ionization system.
a low voltage control unit, said low voltage control unit comprising a transformer for creating a 12VDC output from an alternating current input, said 12VDC output being provided as an input to operate at least one component of said air ionization system.
3. An air ionization system according to claim 1, said system further comprising:
a core, said core having an interior surface defining a first wide opening adjacent the front of said core, a narrow middle opening at a middle of said core, and a second wide opening adjacent a back of said core, said middle section providing a region of air pressure differential compared to said first and second wide openings to thereby urge air outwardly from said middle section.
a core, said core having an interior surface defining a first wide opening adjacent the front of said core, a narrow middle opening at a middle of said core, and a second wide opening adjacent a back of said core, said middle section providing a region of air pressure differential compared to said first and second wide openings to thereby urge air outwardly from said middle section.
4. An air ionization system according to claim 1, said system further comprising a core upon which said ionization needles are mounted, said core comprising a hole adjacent at least one of said ionization needles, said hole allowing said negative ozone to pass directly over said at least one ionization needle immediately as said negative ozone enters said core thereby cleaning contaminants from said needles.
5. An air ionization system comprising:
an ozone generation unit, said ozone generation unit comprising a rectifier for creating a high voltage negative direct current output from an alternating current input; and at least one ozone generation plate connected between said high voltage direct current output and ground, said ozone generation plate creating negative ozone from air passing by said ozone generation plate.
an ozone generation unit, said ozone generation unit comprising a rectifier for creating a high voltage negative direct current output from an alternating current input; and at least one ozone generation plate connected between said high voltage direct current output and ground, said ozone generation plate creating negative ozone from air passing by said ozone generation plate.
6. An air ionization system according to claim 5 wherein said rectifier comprises a half-wave bridge rectifier.
7. An air ionization system according to claim 5 wherein said ozone generation unit further comprises an ozone cartridge adapted to receive said ozone generation plate for creating negative ozone from air passing by said ozone generation plate, said ozone cartridge comprising at least one set of opposed slots for removably receiving said ozone generation plate.
8. An air ionization system according to claim 7 wherein said ozone generation cartridge further comprises a terminal for electrically connecting said ozone generation plate with an output of said ozone generation unit.
9. An air ionization system comprising:
an ozone generation unit, said ozone generation unit comprising an ozone cartridge adapted to receive an ozone generation plate for creating negative ozone from air passing by said ozone generation plate, said ozone cartridge comprising at least one set of opposed slots for removably receiving said ozone generation plate.
an ozone generation unit, said ozone generation unit comprising an ozone cartridge adapted to receive an ozone generation plate for creating negative ozone from air passing by said ozone generation plate, said ozone cartridge comprising at least one set of opposed slots for removably receiving said ozone generation plate.
10. An air ionization system according to claim 9 wherein said ozone generation cartridge further comprises a terminal for electrically connecting said ozone generation plate with an output of said ozone generation unit.
11. An air ionization system according to claim 9 wherein said ozone generation cartridge further comprises a projection for receiving a connector attached to said ozone generation plate to thereby removably fix said ozone generation plate within said cartridge.
12. An air ionization system comprising:
an ionization unit, said ionization unit providing positive and negative high voltage direct current output to a plurality opposed pairs of ionization needle assemblies, said positive high voltage direct current output being connected to a first number said opposed pairs ionization needle assemblies, and said negative high voltage direct current output being connected to a second number of said opposed pairs of ionization needle assemblies, said second number being greater than said first number.
an ionization unit, said ionization unit providing positive and negative high voltage direct current output to a plurality opposed pairs of ionization needle assemblies, said positive high voltage direct current output being connected to a first number said opposed pairs ionization needle assemblies, and said negative high voltage direct current output being connected to a second number of said opposed pairs of ionization needle assemblies, said second number being greater than said first number.
13. An air ionization system according to claim 12 wherein said second number comprises 80% of said plurality of opposed pairs of ionization needle assemblies.
14. An air ionization system according to claim 12 wherein said second number comprises between 50% and 100% of said plurality of opposed pairs of ionization needle assemblies.
15. An air ionization system comprising:
a core;
a plurality of opposed pairs of ionization needle assemblies are mounted on said core;
at least one pair of opposed slots formed in said core between said opposed pairs of ionization needle assemblies; and at least one percentage divider plate adapted to be removably received by said at least one pair of opposed slots for isolating a first set of said plurality of opposed pairs of ionization needle assemblies from a second set of said plurality of opposed pairs of ionization needle assemblies.
a core;
a plurality of opposed pairs of ionization needle assemblies are mounted on said core;
at least one pair of opposed slots formed in said core between said opposed pairs of ionization needle assemblies; and at least one percentage divider plate adapted to be removably received by said at least one pair of opposed slots for isolating a first set of said plurality of opposed pairs of ionization needle assemblies from a second set of said plurality of opposed pairs of ionization needle assemblies.
16. An air ionization system comprising:
at least one ionization needle assembly connected to an output of an ionization unit, said at least one ionization needle assembly comprising at least one removably replaceable ionization needle in electrical connection with said output.
at least one ionization needle assembly connected to an output of an ionization unit, said at least one ionization needle assembly comprising at least one removably replaceable ionization needle in electrical connection with said output.
17. An air ionization system according to claim 16 wherein said ionization needle assembly comprises:
an insulating base section;
a wire inserted into a bottom of said base section; and a connector clip electrically fastened to a conductor of said wire, said at least ionization needle being removably inserted into said connector clip and extending axially outward from said base section.
an insulating base section;
a wire inserted into a bottom of said base section; and a connector clip electrically fastened to a conductor of said wire, said at least ionization needle being removably inserted into said connector clip and extending axially outward from said base section.
18. An air ionization system comprising:
a low voltage control unit, said low voltage control unit comprising a transformer for creating a 12VDC output from an alternating current input; said 12VDC output being provided as an input to operate at least one component of said air ionization system.
a low voltage control unit, said low voltage control unit comprising a transformer for creating a 12VDC output from an alternating current input; said 12VDC output being provided as an input to operate at least one component of said air ionization system.
19. An air ionization system according to claim 18 wherein said at least one component is a fan.
20. An air ionization system according to claim 18 wherein said low voltage control unit further comprises at least one 12VDC
relay for controlling said input to operate said at least one component.
relay for controlling said input to operate said at least one component.
21. An air ionization system according to claim 18 wherein said at said 12VDC output is provided to a terminal strip, said terminal strip connecting said 12VDC output as an input to at least one additional air ionization system for operating at least one component of said additional air ionization system.
22. An air ionization system according to claim 21 wherein said system and said at least one additional system share a common control panel for controlling operation said system and said at least one additional system.
23. An air ionization system comprising:
a core, said core having an interior surface defining a first wide opening adjacent the front said of said core, a narrow middle opening at a middle of said core, and a second wide opening adjacent a back of said core, said middle section providing a region of air pressure differential compared to said first and second wide openings to thereby urge air outwardly from said middle section.
a core, said core having an interior surface defining a first wide opening adjacent the front said of said core, a narrow middle opening at a middle of said core, and a second wide opening adjacent a back of said core, said middle section providing a region of air pressure differential compared to said first and second wide openings to thereby urge air outwardly from said middle section.
24. An air ionization system comprising:
a core comprising at least one set aligned angled slots formed in a top and bottom of said core adjacent a front of said core, said at least one set of aligned slots being adapted to receive an air distribution fin for reducing turbulence created by air exiting the system from the front of said core.
a core comprising at least one set aligned angled slots formed in a top and bottom of said core adjacent a front of said core, said at least one set of aligned slots being adapted to receive an air distribution fin for reducing turbulence created by air exiting the system from the front of said core.
25. An air ionization system comprising:
a core;
at least one purging hose connected to a compressed air source, said purging hose extending into said core and being adapted to move within said core when compressed air is forced through said purging hose to thereby clean contaminants from an interior surface of said core.
a core;
at least one purging hose connected to a compressed air source, said purging hose extending into said core and being adapted to move within said core when compressed air is forced through said purging hose to thereby clean contaminants from an interior surface of said core.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/501,892 US5667563A (en) | 1995-07-13 | 1995-07-13 | Air ionization system |
| US08/501,892 | 1995-07-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2153929A1 true CA2153929A1 (en) | 1997-01-14 |
Family
ID=23995447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002153929A Abandoned CA2153929A1 (en) | 1995-07-13 | 1995-07-14 | Air ionization system |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US5667563A (en) |
| CA (1) | CA2153929A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1980520B (en) * | 2005-12-05 | 2012-04-18 | Smc株式会社 | Ionizer with parts-extension unit |
| CN1980521B (en) * | 2005-12-05 | 2012-05-30 | Smc株式会社 | Electrostatic eliminator with drop-off prevention device for electrode |
| CN108266882A (en) * | 2017-12-18 | 2018-07-10 | 四会市华通金属筛网制品有限公司 | Effectively slow down the filter screen device of air cleaning facility |
Families Citing this family (43)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2750622B1 (en) * | 1996-07-02 | 1998-09-25 | Air Liquide | DRY SURFACE TREATMENT METHOD AND DEVICE FOR CARRYING OUT SUCH A METHOD |
| JP3004938B2 (en) * | 1997-03-07 | 2000-01-31 | 株式会社オーデン | Electric dust collector and method of manufacturing the same |
| US5919417A (en) * | 1997-07-15 | 1999-07-06 | Rutland; Earl E. | Duct cleaning method |
| US6176977B1 (en) | 1998-11-05 | 2001-01-23 | Sharper Image Corporation | Electro-kinetic air transporter-conditioner |
| US20030206837A1 (en) | 1998-11-05 | 2003-11-06 | Taylor Charles E. | Electro-kinetic air transporter and conditioner device with enhanced maintenance features and enhanced anti-microorganism capability |
| US7695690B2 (en) | 1998-11-05 | 2010-04-13 | Tessera, Inc. | Air treatment apparatus having multiple downstream electrodes |
| US20050210902A1 (en) | 2004-02-18 | 2005-09-29 | Sharper Image Corporation | Electro-kinetic air transporter and/or conditioner devices with features for cleaning emitter electrodes |
| JP3059438B1 (en) * | 1999-05-31 | 2000-07-04 | 株式会社オーデン | Electric dust collection unit |
| US6482253B1 (en) * | 1999-09-29 | 2002-11-19 | John P. Dunn | Powder charging apparatus |
| RU2182523C1 (en) * | 2001-02-08 | 2002-05-20 | Общество с ограниченной ответственностью "ВИНТЕЛ" | Device for accumulating of aerosols from gases |
| US6506232B2 (en) * | 2001-03-13 | 2003-01-14 | Ion Systems, Inc. | Air ionization apparatus and method for efficient generation and cleaning |
| US6589314B1 (en) | 2001-12-06 | 2003-07-08 | Midwest Research Institute | Method and apparatus for agglomeration |
| US6758884B2 (en) * | 2002-08-07 | 2004-07-06 | 3M Innovative Properties Company | Air filtration system using point ionization sources |
| US6620224B1 (en) * | 2002-08-12 | 2003-09-16 | Kabushiki Kaisha Circland | Air purification device with a needle-shaped electrode having a protective cover thereon |
| ES2331794T3 (en) * | 2003-01-21 | 2010-01-15 | Helmut Dipl.-Ing. Siegmund | DEVICE FOR OXYGEN ACTIVATION OF THE AIR FOR DEGRADATION OF CHARGES OF VOLATILE ORGANIC COMPOUNDS (VOC) AND GERMANS IN CLOSED ENVIRONMENTS AS WELL AS FOR MAINTENANCE OF OXYGEN ION CONCENTRATION AND OZONE CONCENTRATION EQUAL TO THE NATURE. |
| US6807044B1 (en) | 2003-05-01 | 2004-10-19 | Ion Systems, Inc. | Corona discharge apparatus and method of manufacture |
| ATE530242T1 (en) * | 2003-07-18 | 2011-11-15 | David Richard Hallam | AIR TREATMENT DEVICE |
| JP3979652B2 (en) * | 2003-08-21 | 2007-09-19 | 株式会社相羽 | Air cleaning apparatus and air cleaning method |
| US7724492B2 (en) | 2003-09-05 | 2010-05-25 | Tessera, Inc. | Emitter electrode having a strip shape |
| US7906080B1 (en) | 2003-09-05 | 2011-03-15 | Sharper Image Acquisition Llc | Air treatment apparatus having a liquid holder and a bipolar ionization device |
| US7767169B2 (en) | 2003-12-11 | 2010-08-03 | Sharper Image Acquisition Llc | Electro-kinetic air transporter-conditioner system and method to oxidize volatile organic compounds |
| KR100535123B1 (en) * | 2003-12-31 | 2005-12-07 | 현대자동차주식회사 | Hybrid type air cleaner for automobile |
| US7141098B2 (en) * | 2004-01-22 | 2006-11-28 | 3M Innovative Properties Company | Air filtration system using point ionization sources |
| US20060016333A1 (en) | 2004-07-23 | 2006-01-26 | Sharper Image Corporation | Air conditioner device with removable driver electrodes |
| US20060096331A1 (en) * | 2004-11-05 | 2006-05-11 | Kim Sookil | Cleaning device for clothes |
| JP4239992B2 (en) * | 2005-03-16 | 2009-03-18 | トヨタ自動車株式会社 | Gas purification device |
| US8043412B2 (en) * | 2005-06-16 | 2011-10-25 | Savannah River Nuclear Solutions, Llc | High volume, multiple use, portable precipitator |
| JP3949146B2 (en) * | 2005-07-22 | 2007-07-25 | シャープ株式会社 | Air conditioner |
| US7537647B2 (en) * | 2005-08-10 | 2009-05-26 | S.C. Johnson & Son, Inc. | Air purifier |
| WO2007038778A2 (en) * | 2005-09-29 | 2007-04-05 | Sarnoff Corporation | Ballast circuit for electrostastic particle collection systems |
| CH698694B1 (en) * | 2006-01-25 | 2009-10-15 | Lufttechnik & Metallbau Ag | Air cleaning apparatus, in particular for ventilation and air conditioning. |
| US7833322B2 (en) | 2006-02-28 | 2010-11-16 | Sharper Image Acquisition Llc | Air treatment apparatus having a voltage control device responsive to current sensing |
| US7497898B2 (en) * | 2006-10-31 | 2009-03-03 | Smc Corporation | Ionizer |
| US8845782B2 (en) | 2007-01-22 | 2014-09-30 | Karen Metteer | Modular ductwork decontamination assembly |
| US7740686B2 (en) * | 2007-01-22 | 2010-06-22 | Karen Metteer | Modular ductwork decontamination assembly |
| US8388731B2 (en) * | 2007-01-22 | 2013-03-05 | Karen Metteer | Modular ductwork decontamination assembly |
| JP4811731B2 (en) * | 2007-02-14 | 2011-11-09 | Ｓｍｃ株式会社 | Ionizer |
| WO2008116191A1 (en) * | 2007-03-21 | 2008-09-25 | Ronald Bruce Long | Maintenance free oxidizer generation and application apparatus for environmental microbiological control |
| US8080085B2 (en) * | 2008-06-03 | 2011-12-20 | Raytheon Company | Methods and apparatus for an ionizer |
| CN101703874B (en) * | 2009-11-16 | 2011-09-28 | 浙江大学 | Separate-type nozzle electrode system for governing direct-current corona discharge smoke |
| US9388717B2 (en) * | 2010-03-31 | 2016-07-12 | Global Solutions Technology, Inc. | Apparatuses and methods for reducing pollutants in gas streams |
| US8951360B2 (en) | 2010-12-14 | 2015-02-10 | Whirlpool Corporation | Ozone generation module |
| CN108571776A (en) * | 2018-06-22 | 2018-09-25 | 合肥德捷节能环保科技有限公司 | A kind of air cleaning facility being conveniently replaceable ozone bacterium |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2195431A (en) * | 1935-10-09 | 1940-04-02 | Koppers Co Inc | Gas treating apparatus |
| US2639781A (en) * | 1948-12-10 | 1953-05-26 | Air Maze Corp | Electrostatic filter |
| US2841242A (en) * | 1956-08-13 | 1958-07-01 | Cottrell Res Inc | Method for electrostatically treating gases |
| US4449159A (en) * | 1977-04-07 | 1984-05-15 | Electric Power Research Institute, Inc. | Focusing electrodes for high-intensity ionizer stage of electrostatic precipitator |
| DK141541B (en) * | 1977-08-04 | 1980-04-14 | Niels Brundbjerg | Regeneration-type air purifier comprising an ozone lamp. |
| SU668707A2 (en) * | 1978-02-22 | 1979-06-25 | Центральный научно-исследовательский и проектно-конструкторский институт профилактики пневмокониозов и техники безопасности | Electrostatic coagulator of aerosols |
| US4551304A (en) * | 1980-10-17 | 1985-11-05 | Heinz Holter | Method of cleaning air loaded with pollutants |
| US4477263A (en) * | 1982-06-28 | 1984-10-16 | Shaver John D | Apparatus and method for neutralizing static electric charges in sensitive manufacturing areas |
| ATE40302T1 (en) * | 1984-12-21 | 1989-02-15 | Bbc Brown Boveri & Cie | METHOD AND DEVICE FOR DUST REMOVAL FROM A GAS STREAM CONTAINING SOLID OR LIQUID PARTICLES IN SUSPENSION USING AN ELECTRIC FIELD. |
| US4842829A (en) * | 1985-11-19 | 1989-06-27 | Tohkai Kogyo Co., Ltd. | Deodorizing apparatus |
| US5334238A (en) * | 1990-11-27 | 1994-08-02 | United Technologies Corporation | Cleaner method for electrostatic precipitator |
| TW332802B (en) * | 1992-06-04 | 1998-06-01 | Nippon Denso Co | The air purifier |
-
1995
- 1995-07-13 US US08/501,892 patent/US5667563A/en not_active Expired - Fee Related
- 1995-07-14 CA CA002153929A patent/CA2153929A1/en not_active Abandoned
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1980520B (en) * | 2005-12-05 | 2012-04-18 | Smc株式会社 | Ionizer with parts-extension unit |
| CN1980521B (en) * | 2005-12-05 | 2012-05-30 | Smc株式会社 | Electrostatic eliminator with drop-off prevention device for electrode |
| CN108266882A (en) * | 2017-12-18 | 2018-07-10 | 四会市华通金属筛网制品有限公司 | Effectively slow down the filter screen device of air cleaning facility |
Also Published As
| Publication number | Publication date |
|---|---|
| US5667563A (en) | 1997-09-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5667563A (en) | Air ionization system | |
| CN110958891A (en) | Electric filter device | |
| US5942017A (en) | Electronic equipment air conditioner and purifier | |
| JP5546630B2 (en) | Microbe / virus capture / inactivation equipment | |
| US3191362A (en) | Electrostatic air purifier | |
| SE9400110D0 (en) | air cleaning apparatus | |
| JPH038831B2 (en) | ||
| KR100606828B1 (en) | Device for air-purifying in air conditioner | |
| GB2412727A (en) | An air purifying and disinfecting device | |
| KR20140134167A (en) | Ionizer and Air conditioner having the same | |
| US6092387A (en) | Air conditioner with electric dust collector | |
| JPWO2013065205A1 (en) | Methods for capturing and inactivating microorganisms and viruses | |
| GB2301179A (en) | Air purifier | |
| KR20020026252A (en) | Indoor unit for air conditioner | |
| JP2003090554A (en) | Air conditioner | |
| WO2021205952A1 (en) | Air-conditioning apparatus | |
| US20060005705A1 (en) | Electro-optical air sterilizer with ionizer | |
| JP2001338744A (en) | Negative ion generator | |
| JP2003227637A (en) | Oil mist removing air conditioner | |
| US7824475B2 (en) | Air cleaning device | |
| KR100192438B1 (en) | Airconditioning apparatus of room airconditioner | |
| US20230151987A1 (en) | Chilled Beam with Ion Generator | |
| KR950009286Y1 (en) | Vacuum cleaner with air cleaning function | |
| KR0116219Y1 (en) | Air-purification device of welding place | |
| JPH1094739A (en) | Air purifier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |
Effective date: 20000714 |