CN100474470C - Electrical equipment - Google Patents

Electrical equipment Download PDF

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Publication number
CN100474470C
CN100474470C CNB2004100769570A CN200410076957A CN100474470C CN 100474470 C CN100474470 C CN 100474470C CN B2004100769570 A CNB2004100769570 A CN B2004100769570A CN 200410076957 A CN200410076957 A CN 200410076957A CN 100474470 C CN100474470 C CN 100474470C
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CN
China
Prior art keywords
electrolytic capacitor
electric equipment
electronic component
circuit substrate
scheme
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Expired - Fee Related
Application number
CNB2004100769570A
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Chinese (zh)
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CN1576691A (en
Inventor
大崎肇
阿部勋
浅见健一
松永启之
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Toshiba Lighting and Technology Corp
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Toshiba Lighting and Technology Corp
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Publication of CN1576691A publication Critical patent/CN1576691A/en
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/18—Printed circuits structurally associated with non-printed electric components
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004—Details
    • H01G9/08—Housing; Encapsulation
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/02—Details
    • H05K5/03—Covers
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007—Types of components
    • H05K2201/10015—Non-printed capacitor
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
    • H05K2203/30—Details of processes not otherwise provided for in H05K2203/01 - H05K2203/17
    • H05K2203/304—Protecting a component during manufacturing

Abstract

Provided is an electric device with long life of which, an electrolytic capacitor is restrained from explosion, even if the electrolyte capacitor is mounted inside a case. The electric device 7 comprises a circuit board 30 on which, electrolytic capacitors 34, and electronic components 32 using resin material containing halide by 1.0 mass% or less at bromine conversion, are mounted; and a case 4 covering the circuit board 30. As the content of halide contained in the resin used for the electronic components 32 is made 1.0 mass% or less, the electrolyte capacitors 34 are protected form the loss of function at early stage caused by erosion, and the electronic device 7 is prevented from having a short life.

Description

Electric equipment
The application be on March 29th, 2002 application, title for the application number of " electric equipment " be dividing an application of 02108513.7 application for a patent for invention.
Technical field
The present invention relates in housing, contain the electric equipment that the electronic component of electrolytic capacitor and use synthetic resin has been carried out the circuit substrate of assembling.
Background technology
The electric equipment of the discharge lamp ignition device that lighting device is used etc. is because of having adopted the structure of carrying out the electric component group dress on the circuit substrate that is printed with wiring graph on the substrate, so tending to lightweight and miniaturization.Particularly discharge lamp ignition device with traditional ironcore choke is compared as the electric equipment that current limiting element uses, can be realized by a larger margin lightweight and miniaturization along with the inverterization of having used electronic component.
Open the record that flat 8-No. 329731 communiques are done as Japanese patent of invention spy; the common structure of electric equipment of having used electronic component be with from the outside in order to protect and to insulate and the circuit substrate that is assembled with electronic component is housed in the housing, in the housing sometimes the heating because of electronic component make temperature surpass 70 ℃.For this reason, the electric equipment of above-mentioned conventional art is to adopt covering heat shading apparatus with the assembling area region of circuit substrate separately, the heater element in the electronic component and non-heater element is assembled in separately the zone, with the influence of the heat that reduces electronic component.
This electric equipment exists the tendency that the temperature in the housing rises significantly along with miniaturization, although adopt covering heat shading apparatus to distinguish in the housing as above-mentioned conventional art, also is difficult to prevent the thermal impact of electric equipment.
Therefore, electronic component is necessary the electronic component that uses heat resisting temperature high.Particularly unusual the grade when making that excessive temperature rises in the housing occur because of electric equipment,, normally in the synthetic resin material that electronic component uses, add the incombustible agent of forming by halide etc. for making electronic component that burning not take place and smoldering.
Yet because of excessive temperature in the housing of electric equipment rises, the electronic component of long-term use is destroyed, and tends to make the life termination of electric equipment, but owing to the parts that destroyed and thermal impact is irrelevant, can make electric equipment sometimes again than doing sth. in advance end-of-life usually.That is, in electronic component, electrolytic capacitor is because of being other the former thereby reduction charge characteristic that causes with thermal impact fully sometimes, and forfeiture is as the function of capacity cell.
Summary of the invention
The present invention in view of the above problems, its purpose is, even provide a kind of electrolytic capacitor that is equipped with in housing also can restrain long-life electric equipment that electrolytic capacitor is destroyed.
According to the present invention, the feature of the 1st technical scheme is, possess: circuit substrate, this circuit substrate are equipped with by body, to be located at intrinsic ethylene glycol be that electrolyte, electrode and the envelope that mainly is shaped by butyl rubber end the electrolytic capacitor that rubber constitutes and use the halogen of polymer-type is the electronic component of incombustible agent; And the housing of coating circuit substrate.For example, when the ignition device of the discharge lamp lighting that this electric equipment is used for fluorescent lamp etc., in order again discharge lamp to be replaced by in about 10000 hours and also can to use after new surpassing described discharge lamp, need to use the electrolytic capacitor of longer life, general consideration is used and is filled with the electrolytic capacitor that ethylene glycol is electrolyte.And,,, must restrain the electrode of the halogenation ion etching electrolytic capacitor of invading electrolyte and shorten life-span of electrolytic capacitor as the explanation that the invention of technical scheme 1 has been done in this occasion.
For this reason, even it is the electronic component of incombustible agent that the present invention adopts the halogen that has used in higher environment temperature halogenation gas also to be difficult to the polymer-type of emitting in housing, emit the envelope that also is difficult to invade electrolytic capacitor inside to end rubber be butyl rubber even also adopt simultaneously, promptly, its reason is that butyl rubber is not easy to see through owing to halogenation gas, so halogenation gas is few through sealing the phenomenon of ending the electrode corrosion that causes capacitor in the rubber intrusion electrolytic capacitor.Thus, can prolong the life-span of electrolytic capacitor, and then prolong the life-span of electric equipment.
The feature of the 2nd technical scheme is that in technical scheme 1 described electric equipment, the halogen of polymer-type is that incombustible agent is brominated polycarbonate, bromination epoxy or brominated styrene.These organic system bromine compoundss are owing to normally be not easy to emit to the outside under conventional environment, therefore, as long as the root a tree name need have been improved the environment for use of environment temperature etc., just can prolong actual life widely.
The feature of the 3rd technical scheme is that in technical scheme 1 described electric equipment, electronic component is a film capacitor.The halogen that has used polymer-type is that the film capacitor of incombustible agent is difficult to emit halogenation gas.
The feature of the 4th technical scheme is that in technical scheme 1 described electric equipment, electronic component temperature around uses below 120 ℃.
The feature of the 5th technical scheme is that in technical scheme 1 described electric equipment, circuit substrate is the high frequency inverter of discharge lamp lighting.By using inverter, can on the basis of technical scheme 1 effect, carry out the discharge lamp lighting in the housing effectively.
The feature of the 6th technical scheme is that in technical scheme 2 described electric equipments, the bromide ion concentration in the electrolyte when electric equipment uses is as below the 2PPM.When using bromide ion,, just can prevent the electrolytic capacitor deterioration if be in below the above-mentioned concentration.In addition, when the halogenation gas of invading electrolytic capacitor was chlorine, the limit of chlorine ion concentration was 10PPM.In case surpass this limit, chloride ion just might corrode the electrode of electrolytic capacitor.
The feature of the 7th technical scheme is that in technical scheme 1 described electric equipment, electrolytic capacitor uses under the voltage below the 200V.It is that butyl rubber is invaded that halogenation gas ends rubber as organic substance from the envelope of electrolytic capacitor.This organic substance and ethylene glycol are to carry out ion dissociation after the reaction of moisture of electrolyte, though its result is the electrode of electrolytic capacitor inside is that aluminium foil is corroded, but as can be seen: in order to postpone this decomposition, needing only resolution is that voltage drop is low to moderate about 200V.In addition, if strengthen the capacity of electrolytic capacitor,, also just can postpone above-mentioned decomposition rate because of the amount of electrolyte also increases.
According to other aspects of the invention, the feature of the electric equipment of the 8th technical scheme is to possess: with electrolytic capacitor and use halid amount to be scaled the circuit substrate that the electronic component of the following resin material of 1.0% (quality percentage) has carried out assembling with bromine; And the housing that coats this circuit substrate.
Present inventors etc. see the electrode foil or the terminal corrosion of electrolytic capacitor inside when analyzing the electrolytic capacitor that is destroyed in early days, spill the outside because of this corrosion makes electrolyte, cause the function stop of electrolytic capacitor.
Why can to cause electrolyte to spill in order investigating thoroughly, when analyzing, to detect with the concentration of bromine (Br) 3PPM from electrolyte that this electrolytic capacitor spills.It is generally acknowledged: this bromine is invaded from the envelope not-go-end of electrolytic capacitor, bromide ionization in the electrolyte that produces current potential, and the electrode of aluminum is corroded because of following chemical reaction.
2Al+6HBr→2AlBr 3+3H 2
Can be estimated as: rise because of this corrosion makes the electrolytic capacitor pressure inside, the explosion-proof valve start of electrolytic capacitor causes electrolyte to spill.
This corrosion phenomenon ends the rubber occasion in the lower envelope of envelope not-go-end use cost of electrolytic capacitor and produces.When the analysis envelope is ended rubber, also end the rubber and detect bromine from envelope, because detectable concentration increases gradually from the outside along the direction of electrolytic capacitor private side, therefore, it is generally acknowledged: the bromine that is present in the electrolytic capacitor outside ends diffusion in the rubber, moves to electrolytic capacitor inside in envelope.
Secondly, when the generation source of this bromine of investigation, can be confirmed to be the electronic component that is assembled in the circuit substrate.That is, can be estimated as: at electronic component is in the epoxy resin of film capacitor use, contains the halide as incombustible agent, and this halide is HBB (C 6Br 6) distilling gradually under the heating condition for a long time, emit (perhaps resolve into low-molecular-weight bromine compounds, emit to the outside as gas componant) as gas componant to the outside of epoxy resin, the envelope not-go-end of emitting to electrolytic capacitor from electronic component because of this bromine compounds moves.
Infer in order to confirm this, adopt and a kind ofly have only that to have used incombustible agent be halid amount and be scaled the electronic component of the following synthetic resin of 1.0% (quality percentage) (so-called non-halogenated be resin) and the circuit board structure of electrolytic capacitor combination thereof with bromine, be housed in the housing of air-tight state roughly and make its action, do not cause that the electrolyte that causes because of the electrolytic capacitor corrosion spills this moment.End in the rubber in the electrolyte of the electrolytic capacitor inside of whole life period and envelope and do not see bromine again.
Again, because of incombustible agent is that halid amount is few more, the corrosion damping effect is just good more, so if prefer to be in the extremely occasion of high temperature at electronic component, then incombustible agent is that halid amount preferably converts below 1.0% (quality percentage) with bromine.
Yet, so-called " halid amount converts 1.0% (quality percentage) below with bromine " is meant following implication: promptly, the synthetic resin burning of determined test portion formed gasify, this gas dissolving in water, is measured whole bromide ion molal quantitys that contain of per unit volume then with ion chromatography analysis.Secondly, the atomic weight that multiply by bromine is calculated its weight, and obtaining the weight of test portion is below 1.0% as the percentile value of denominator number.
As the resin material that electronic component is used, except epoxy resin, also can list phenol is resin, polybutylene terephthalate (PBT) (PBT), PETG (PET), polycarbonate (PC) etc.
Again, the sheathing material of coating circuit also is the nonflammable resin that adopts PBT, PET, PC, acrylonitrile-butadiene-styrene copolymerized body (ABS), polystyrene (PS) etc. mostly.
Again, aspect the incombustible agent that in this resin material, contains,, for example, be incombustible agent as the halogen of addition type as the halide that might in electrolytic capacitor, cause corrosion, can adopt HBB (C 6Br 6), phenyl-pentabromide, tetrabromo chlorobenzene or tribromo bis-phenol (TBA), perhaps, as polymer-type halogen be incombustible agent, can adopt bigger polymer-type such as the molecular weight of brominated polycarbonate, bromination epoxy, brominated styrene etc. bromine compounds.Under common environment, this organic system bromine compounds normally is not easy to emit to the outside, but under high temperature and high humidity environment, finally be decomposed into low-molecular-weight bromine compoundss such as tribromphenol and dibromophenol lentamente, the same with HBB, the distillation back emits to the outside easily, in this occasion, it is generally acknowledged if improve environment for use, just can prolong time used greatly.
If adopt the invention of technical scheme 8,, therefore, can restrain electrolytic capacitor and disappear because of the early function that corrosion causes because the halid amount that contains in the synthetic resin with the electronic component use is decided to be below 1.0% (quality percentage).Prevent the short life of electric equipment.
The feature of the electric equipment of the 9th technical scheme is to possess: have the electronic component that electrolytic capacitor and use contain halid resin material, electrolytic capacitor have be mounted to by electronic component cover out circuit substrate; And the housing that coats this circuit substrate.Used surpass incombustible agent be halid amount be scaled with bromine 1.0% (quality percentage) synthetic resin (so-called difficult combustion resin) electronic component as mentioned above, though might destroy electrolytic capacitor, but it is generally acknowledged: using non-halogenated is that the electronic component of resin is not general material, cost is risen, and electronic component does not reach the difficulty combustion degree in the electric equipment service condition sometimes yet.Therefore, even after will having used the electronic component and electrolytic capacitor combination of difficult combustion resin, also must take to prevent to destroy the measure of electrolytic capacitor.
The destructive process of electrolytic capacitor can be inferred from above-mentioned, can confirm: only otherwise make halide or the low molecular weight brominated compound that decomposes from halide diffuses in the electrolytic capacitor, electrolytic capacitor just can not cause early damage because of the electrolysis leakage.That is, as if the device that covers electrolytic capacitor and electronic component by setting, supression halide or the low molecular weight compound that decomposes from halide constantly spread in electrolytic capacitor, just can prevent the electrolytic capacitor early damage.
If adopt the invention of technical scheme 9, because the form of covering out with electrolytic capacitor and electronic component is assembled on the circuit substrate, therefore, can restrain the early damage of electrolytic capacitor, prevent the short life of electric equipment.
The feature of the 10th technical scheme is that in the electric equipment of technical scheme 9, the envelope not-go-end of electrolytic capacitor is coated by masking device, covers out with electronic component.As masking device, so long as low molecular weight compound is difficult to spread and the insulator of electrolytic capacitor insulation is got final product, for example, except the synthetic resin material of silicones, urethane, vinylidene chloride etc., also can list metal, glass, pottery of aluminium etc. etc.
If adopt the invention of technical scheme 10, because envelope not-go-end crested device coats, therefore, can restrain the low molecular weight compound that decomposes from halide and in electrolytic capacitor, spread, prevent the short life of electric equipment.
The feature of the 11st technical scheme is that in the electric equipment of technical scheme 9, electrolytic capacitor covers out with electronic component by making the approaching or butt of its envelope not-go-end and circuit substrate.The envelope not-go-end of electrolytic capacitor if with the circuit substrate butt, then low molecular weight compound is difficult to invade, with regard to the unnecessary masking device that is provided with in addition again.In addition, can confirm: though not approaching with the distance below the 1.0mm with it with the circuit substrate butt, because of lower low molecular weight compound also is difficult to invade, so have the effect that supression is spread in electrolytic capacitor.
If adopt the invention of technical scheme 11, because envelope not-go-end and circuit substrate are approaching or butt, therefore, the unnecessary masking device that is provided with in addition again can be restrained the low molecular weight compound that decomposes from halide and spread in electrolytic capacitor, prevents the short life of electric equipment.
The feature of the 12nd technical scheme is that the electrolytic capacitor of technical scheme 9 covers out with electronic component by dispose baffle around it.Baffle both can coat the entire circumference of electrolytic capacitor, also can coat by an envelope not-go-end with electrolytic capacitor.Baffle must be that the material that adopts the low molecular weight compound that decomposes from halide to be difficult to spread constitutes, and for example, except the synthetic resin material of silicones, urethane, vinylidene chloride etc., can be made of the metal of aluminium etc., glass, pottery etc.This baffle both can be integrated with circuit substrate, also can be integrated with lid.Can cover electrolytic capacitor by being installed on circuit substrate or the lid again.
If adopt the invention of technical scheme 12, because electrolytic capacitor is covered by baffle, therefore, can restrain the low molecular weight compound that decomposes from halide definitely and in electrolytic capacitor, spread, prevent the short life of electric equipment.
The feature of the electric equipment of the 13rd technical scheme is to possess: electrolytic capacitor and use are contained the circuit substrate that the electronic component of halid resin material has carried out assembling; And will be configured in around the electrolytic capacitor and be provided with the housing that the circuit substrate of air vent hole is coated.This air vent hole is to be used for the low molecular weight compound that decomposes from halide was emitted to the outside before diffusing to electrolytic capacitor.Therefore, air vent hole must be configured in electrolytic capacitor around, except near electrolytic capacitor, also configurable centre position at electrolytic capacitor and electronic component.
Again, can adopt the forced-ventilation device, also can take to utilize the mode of emitting naturally of free convection etc. from both emitting of air vent hole.But in the occasion of emitting naturally, because of the method difference of arrangements of components, ventilation path and convection current path are different, so consider the factor such as structure of circuit substrate and be provided with in position, just can obtain better effect.
If adopt the invention of technical scheme 13, owing to around electrolytic capacitor, air vent hole is set, therefore, can will emits to the outside from the low molecular weight compound that halide decomposes effectively, restrain low molecular weight compound and spread, prevent the short life of electric equipment to electrolytic capacitor.
The feature of the electric equipment of the 14th technical scheme is, possess: have the electronic component that electrolytic capacitor and use contain halid resin material, the circuit substrate of element separately is installed for the envelope not-go-end direction that makes electrolytic capacitor becomes the direction that does not dispose electronic component; And the housing of coating circuit substrate.Can confirm: though halide or in housing, spread from the low molecular weight compound that halide decomposes, but, will produce tangible electrolytic capacitor corrosion if the envelope not-go-end of electrolytic capacitor is assembled on promptly relative with the electronic component direction in the source that emits of this low molecular weight compound.Thus, can confirm from experiment: by the envelope not-go-end direction dictates with electrolytic capacitor is not dispose the direction of electronic component, even halide or low molecular weight compound spread in housing, also can restrain in electrolytic capacitor and spread.
If adopt the invention of technical scheme 14, be not dispose the form of electronic component direction owing to be assembled into the envelope not-go-end direction of electrolytic capacitor, therefore, low molecular weight compound is difficult to can prevent the short life of electric equipment to the electrolytic capacitor diffusion.
The feature of the electric equipment of the 15th technical scheme is, possess: have the electronic component that electrolytic capacitor and use contain halid resin material, the circuit substrate of element assembling separately is installed between electrolytic capacitor and the electronic component for low-temperature device is configured in; And the housing of coating circuit substrate.Halide or have the characteristic that obtains supplying on the surface of low temperature part easily from the low molecular weight compound that halide decomposes by obtaining supplying of this low temperature part, can be restrained the diffusion to electrolytic capacitor.
In addition, the low temperature part can list the endothermic section etc. of the heat abstractor of fin and radiator etc.
If adopt the invention of technical scheme 15, because low molecular weight compound obtains supplying of low temperature part, therefore, low molecular weight compound is difficult to can prevent the short life of electric equipment to the electrolytic capacitor diffusion.
The feature of the 16th technical scheme is that in the described electric equipment of the 8th technical scheme, halide is HBB (C 6Br 6).As can be seen: the bromide ion that causes the electrolytic capacitor corrosion radiates as low molecular bromine compound in a large number from HBB.When the present invention contains synthetic resin as the HBB of incombustible agent in use, can obtain significant effect.
When using HBB, owing to directly emit, needn't under the state that lower temperature decomposes, in atmosphere, emit to the outside by original shape, therefore, in the used incombustible agent of circuit block, to the harmful effect maximum of electrolytic capacitor.However, the incombustible agent cost that contains HBB is lower, because of reducing the cost of electric equipment integral body, so use more.
If adopt the invention of technical scheme 16,, therefore, can make the invention effect of technical scheme 1 to 8 obvious because halide is HBB.
The feature of the 17th technical scheme is that in technical scheme 8 to 16 each described electric equipments, the temperature of the circuit substrate during the electric equipment action is more than 70 ℃.Can confirm: the halid low molecular weight compound temperature that is added in the resin material as incombustible agent is high more, and then discharging amount is just many more, in case the temperature of circuit substrate more than 70 ℃, discharging amount will be a lot, cause the corrosion of electrolysis transistor.
If adopt the invention of technical scheme 17,, therefore, can make aforementioned techniques scheme invention effect obvious because the temperature of circuit substrate is more than 70 ℃.
The feature of the 18th technical scheme is that the internal volume of technical scheme 8 to 17 each described electrical equipment shells is 1000cm 3Below.Halid low molecular weight compound spreads in housing, owing to also be that the more little then concentration of housing internal volume is high more under the certain state of discharging amount, therefore, the probability that the more little electrolytic capacitor of housing internal volume is corroded is high more.Can confirm: this phenomenon is 1000cm at the internal volume of housing 3Especially remarkable during following occasion.
If adopt the invention of technical scheme 18, because the internal volume of housing is 1000cm 3Below, therefore, can make the invention effect of aforementioned techniques scheme obvious.
The feature of the 19th technical scheme is that in technical scheme 8 to 18 each described electric equipments, circuit substrate is the high frequency inverter of discharge lamp lighting.
If adopt the invention of technical scheme 19, can provide the electric equipment of the high frequency inverter of using as discharge lamp lighting with the effect of aforementioned techniques scheme.
The feature of the 20th technical scheme is to possess: will be by body, to be located at intrinsic ethylene glycol be that to end the electrolytic capacitor that rubber constitutes and the halogen that uses addition type be the circuit substrate that the electronic component of incombustible agent has carried out assembling for electrolyte, electrode and the envelope that mainly is shaped by butyl rubber; And the housing of coating circuit substrate.As mentioned above, be incombustible agent as the halogen of addition type, generally consider to adopt HBB (C 6Br 6), phenyl-pentabromide, tetrabromo chlorobenzene or tribromphenol (TBA) etc.It is generally acknowledged: the halogen of this addition type is incombustible agent owing to decompose in lower temperature, directly emit by original shape to the outside, therefore, be used for the incombustible agent of circuit element, easily electrolytic capacitor is caused harmful effect, but adopt the envelope that is shaped by butyl rubber to end rubber, just can restrain the halogenation gas of generation and invade electrolytic capacitor inside.
The feature of the 21st technical scheme is that in technical scheme 20 described electric equipments, the halogen of addition type is that incombustible agent is HBB, phenyl-pentabromide or tetrabromo chlorobenzene.
The feature of the 22nd technical scheme is, the envelope of technical scheme 20 described electric equipments is ended rubber by butyl rubber and second propylparaben diacid salt rubber mix and be shaped, the electronic component utilization be located on the housing air vent hole and around temperature use below 50 ℃.What the present invention used is the synthetic rubber of butyl rubber and second propylparaben diacid salt rubber, compare with butyl rubber, though halogenation gas is invaded electrolytic capacitor inside easily, but by the environment temperature of inside electric appliance is restrained below 50 ℃, just can restrain the halogen quantity of in housing, emitting, to reduce the halogenation gas amount of invading electrolytic capacitor, prevent the electrolytic capacitor short life.
Description of drawings
Fig. 1 is the cutaway view of expression electric equipment the 1st example of the present invention.
Fig. 2 is the vertical view that is housed in the circuit substrate in the same electric equipment.
Fig. 3 is the enlarged front view that is housed in the electrolytic capacitor in the same electric equipment.
Fig. 4 is the enlarged front view that is housed in the resonance usefulness film capacitor in the same electric equipment.
Fig. 5 is the electrolytic capacitor front view in the electric equipment of being housed in of the present invention's the 2nd example.
Fig. 6 is the electrolytic capacitor front view in the electric equipment of being housed in of the present invention's the 3rd example.
Fig. 7 is the local cutaway view that amplifies expression of the electric equipment of the present invention's the 4th example.
Fig. 8 is the local cutaway view that amplifies expression of the electric equipment of the present invention's the 5th example.
Fig. 9 is the local cutaway view that amplifies expression of the electric equipment of the present invention's the 6th example.
Figure 10 is the local cutaway view that amplifies expression of the electric equipment of the present invention's the 7th example.
Embodiment
Below, an example of electric equipment of the present invention is described referring to figs. 1 through Fig. 4.
Fig. 1 is the cutaway view of expression electric equipment the 1st example of the present invention, and Fig. 2 is the vertical view that is housed in the circuit substrate in the same electric equipment.As shown in Figure 1, electric equipment 7 is made of the housing 4 of taking in the circuit substrate 30 that is assembled with electronic component.
Housing 4 is for example made by aluminium plate, is rectangle, and is made of the lid 5 of the basket shape of an opening and the basket shape drain pan 6 of a rectangular opening, and lid 5 engages with the side 6a of drain pan 6 respectively.In addition, on this housing 4, be not formed with substantial air vent hole.
As shown in Figure 2.Circuit substrate 30 is a kind of discharge lamp ignition device structures that adopt inverter circuit, and it is the transistor 33 of heat release member and the electrolytic capacitor 34 of level and smooth usefulness etc. with film capacitor 32, switch element that converter is housed that resonance transformer 31, resonance are installed.The 35th, hybrid integrated circuit is installed on the direct substrate 16 after for example mixing such as capacitor, resistance and transistor are formed with different types of element more than 2, with having stable on heating epoxy resin it is insulated.
Fig. 3 is the enlarged front view of electrolytic capacitor 34.Electrolytic capacitor 34 is derived couple of conductor 34b, 34b from body 34a, and the lower end of body 34a sets the envelope of butyl rubber system and ends rubber 34c, utilizes this envelope to end rubber 34c the envelopes such as electrolyte of electrolytic capacitor 34 inside are ended.
Fig. 4 is the enlarged front view of resonance with film capacitor 32.This film capacitor 32 has thin dielectric film in inside, and the mold portion 32a that is made of epoxy resin coats.Derive couple of conductor 32b, 32b from this mold portion 32a.The epoxy resin of mold portion 32a is a kind of HBB (C that do not contain 6Br 6) halide that waits be so-called non-halogenated be resin.Again, in the synthetic resin that other electron component uses, also halide not.
In case electric equipment 7 energized of this example, the electronic component that then is assembled on the circuit substrate 30 begins the action of switch etc., electronic component self-heating.And the temperature in the housing 4 rises, and the temperature that makes circuit substrate 30 is above 100 ℃.But even continue the action of electric equipment for a long time, electrolytic capacitor 34 can not cause destruction because of reasons such as electrolyte spill yet.
Otherwise, it then is from action that resonance has used with the convert electric equipment of comparative example of the so-called difficult combustion epoxy resin that contains HBB 2.0% (quality percentage) of bromine with the mold portion 32a of film capacitor 32, after 1000 hours, can destroy electrolytic capacitor 34, cause the electric equipment action to stop because of electrolyte spills.When the electrolyte of the used electrolytic capacitor of the electric equipment of analyzing this comparative example, as can be seen: though detect the extremely HBB of trace of bromine (Br) concentration 10PPM, but even so Wei Liang HBB is diffusing to electrolytic capacitor 34 when inner, also can reduce the characteristic of electrolytic capacitor and damages function.
In addition, can adopt gas chromatograph or thermal decomposition type mass-synchrometer to judge the HBB that in resin material, contains.Though HBB evaporates because of distillation waits easily,, just damage not too easily as long as molecular structure is not the situation of auxiliary voltage etc.
The following describes the 2nd example.Fig. 5 is the electrolytic capacitor front view in the electric equipment of being housed in of the 2nd example.
In this example, the same with the comparative example of the 1st example, employing be to have used with the convert film capacitor 32 of the so-called difficult combustion epoxy resin contain HBB 2.0% (quality percentage) of bromine at mold portion 32a.
Again, the envelope that comprises of electrolytic capacitor 34 is ended the urethane resin that the envelope not-go-end of the electrolytic capacitor body 34a of rubber 34c is used as masking device 34d and is coated.Thus,, also can restrain these materials and in electrolytic capacitor 34, spread, prevent the short life of electric equipment 7 even HBB or the bromine compounds that decomposes from HBB are emitted from the mold portion 32a of film capacitor 32.
The following describes the 3rd example.Fig. 6 is the electrolytic capacitor front view in the electric equipment of being housed in of the present invention's the 3rd example.
In this example, i.e. the envelope not-go-end of electrolytic capacitor 34 and circuit substrate 30 butts thus, even HBB or emit from the bromine compounds that HBB decomposes also can be restrained these materials and spread, prevent the short life of electric equipment 7 in electrolytic capacitor 34.
The following describes the 4th example.Fig. 7 is the local cutaway view that amplifies expression of the electric equipment of the present invention's the 4th example.
In this example,, on lid 5, drain pan 6 and the circuit substrate 30 of housing 4, air vent hole 5a, 6a and 30a are set separately for the periphery at electrolytic capacitor 34 forms air vent hole.This air vent hole 5a, 6a, 30a have the position relation of vertical communication separately, and electrolytic capacitor 34 and film capacitor 32 are assembled on the circuit substrate 30, and formation is with the arranged spaced state of this air vent hole 5a, 6a, 30a clamping shape.Like this, owing between electrolytic capacitor 34 and film capacitor 32, be provided with air vent hole 5a, 6a, 30a, therefore, even the bromine compounds of emitting HBB or decomposing from HBB, these materials also can be emitted to the outside from air vent hole 5a, 6a, 30a, can restrain diffusion in electrolytic capacitor 34, prevent the short life of electric equipment 7.
The following describes the 5th example.Fig. 8 is the local cutaway view that amplifies expression of the electric equipment of the present invention's the 5th example.
In this example, be provided with the tubular baffle 5b of one at the inner face of the lid 5 of housing 4.In case this lid 5 is chimeric with drain pan 6, the then lower end of baffle 5b and circuit substrate 30 butts are with electrolytic capacitor 34 integral coating.Thus, even the bromine compounds of emitting HBB or decomposing from HBB also can be restrained electrolytic capacitor 34 diffusions of these materials in baffle 5b, prevent the short life of electric equipment 7.
The following describes the 6th example.Fig. 9 is the local cutaway view that amplifies expression of the electric equipment of the present invention's the 6th example.
In this example, electrolytic capacitor 34 is to be decided to be the form of the direction that does not dispose film capacitor 32 with its envelope not-go-end direction and to be assembled on the circuit substrate 30.At this moment, the envelope not-go-end of electrolytic capacitor 34 and the interval of film capacitor 32 are to be advisable more than the 5cm, preferably at interval more than the 10cm.Thus, the low molecular weight compound that halide or halide decompose is difficult to can prevent the short life of electric equipment 7 to electrolytic capacitor 34 diffusions.
The following describes the 7th example.Figure 10 is the local cutaway view that amplifies expression of the electric equipment of the present invention's the 7th example.
In this example, between electrolytic capacitor 34 and film capacitor 32, be provided with cooling device 38 as the low temperature part.Cooling device 38 is made of aluminum, the distolateral fin 39 that is provided with of one.Again, fin 39 is provided in the foreign side of lid 5.Like this, by between electrolytic capacitor 34 and film capacitor 32, being provided with cooling device 38, HBB or supplied by cooling device 38 from the bromine compounds that HBB decomposes can be restrained these materials to electrolytic capacitor 34 diffusions, prevents the short life of electric equipment 7.In addition, described example is the explanation that the electronic component that has used the resin material that contains HBB is done as film capacitor, but the present invention is not limited thereto, can will be configured in the resin material of all electronic components in the housing 4 as object.
The following describes the 8th example.The electric equipment of this example has Fig. 1 of basic and the 1st example to the identical structure of discharge lamp ignition device shown in Figure 4, at this, referring to figs. 1 through Fig. 4 different structures is done one and illustrates that other parts are omitted its detailed description.
This electric equipment for example is a discharge lamp ignition device, by with electrolytic capacitor 34, to use the halogen of polymer-type be that to be resonance carried out the circuit substrate of assembling 30 and the housing of accommodating these parts constituted with film capacitor 32 and the inverter circuit portion etc. that comprises transistor 33 for the electronic component of incombustible agent.And, electrolytic capacitor 34 by body 34a, to be located at intrinsic ethylene glycol be that electrolyte (not shown) and electrode (not shown) and the envelope that mainly is shaped by butyl rubber are ended institute such as rubber 34c and constituted.
By this discharge lamp ignition device during,, be the electrolytic capacitor of electrolyte so used the ethylene glycol that is filled with longer life because of life-span of discharge lamp surpasses about 10000 hours or still can use behind the discharge lamp that more renews with the discharge lamp lighting of fluorescent lamp etc.And,, be necessary to restrain the electrode of the halogen ion etching electrolytic capacitor of invading electrolyte and make the electrolytic capacitor lost of life in this occasion.
The halogen of polymer-type is that incombustible agent is brominated polycarbonate, bromination epoxy or brominated styrene, cause is not to emit to the outside easily usually under conventional environment, so, just can restrain emitting of halogenation gas fully if in the environment temperature below 120 ℃, use etc. by environment for use is improved.
As mentioned above, even this example is that a kind of halogen used the polymer-type that halogenation gas is difficult to emit in housing that also adopts in higher environment temperature is even that the electronic component of incombustible agent and use are emitted the envelope that also is difficult to invade electrolytic capacitor inside and ended the structure that rubber is butyl rubber, thus, can prolong the life-span of electrolytic capacitor, and then prolong the life-span of discharge lamp ignition device.
The following describes the 9th example.The electric equipment of this example is that the halogen with the polymer-type in the electronic component of the 8th example is that the halogen that incombustible agent changes to addition type is incombustible agent, because of other structure basic identical, its detailed description of Therefore, omited.
This electric equipment for example is a discharge lamp ignition device, has electrolytic capacitor 34 and to use the halogen of addition type be the circuit substrate that the electronic component etc. of incombustible agent has carried out assembling.As mentioned above, be incombustible agent as the halogen of addition type, comprise HBB (C 6Br 6), phenyl-pentabromide, tetrabromo chlorobenzene or tribromphenol (TBA) etc.It is generally acknowledged: the halogen of this addition type is that incombustible agent decomposes in lower temperature, because of directly emitting to the outside by original shape, so in the used incombustible agent of circuit block, easily electrolytic capacitor is caused harmful effect, but adopt the envelope that is shaped by butyl rubber to end rubber, can restrain the halogenation gas of generation and invade electrolytic capacitor inside.
Again, when the rubber that uses than low butyl rubber of butyl rubber cost and second propylparaben diacid salt rubber mix, described electronic component preferably uses in the environment temperature that forms by the air vent hole of being located at housing 4 below 50 ℃.Promptly, do one relatively with butyl rubber, though halogenation gas is invaded electrolytic capacitor inside easily, but because of the environment temperature of inside electric appliance is restrained below 50 ℃, so can restrain the halogen quantity of in housing, emitting, reduce the halogenation gas amount of invading electrolytic capacitor, prevent the electrolytic capacitor short life.
Ethylene glycol when using discharge lamp ignition device again, is that bromide ion concentration in the electrolyte is preferably below the 2PPM.That is, when producing bromide ion,, then can prevent the deterioration of electrolytic capacitor if be in below the above-mentioned concentration.
Again, during the voltage of electrolytic capacitor below using 200V, owing to can postpone the ion dissociation speed that ethylene glycol is the halogenation gas in the electrolyte, therefore, the electrode that can restrain electrolytic capacitor inside is the corrosion of aluminium foil.Thus, can prolong the life-span of electrolytic capacitor, prolong the life-span of discharge lamp ignition device.

Claims (7)

1, a kind of electric equipment is characterized in that, possesses:
Circuit substrate, described circuit substrate be equipped with by body, to be located at intrinsic ethylene glycol be that electrolyte, electrode and the envelope that mainly is shaped by butyl rubber end the electrolytic capacitor that rubber constitutes and use the halogen of polymer-type is the electronic component of incombustible agent;
And the housing of coating circuit substrate.
2, electric equipment as claimed in claim 1 is characterized in that, the halogen of described polymer-type is that incombustible agent is brominated polycarbonate, bromination epoxy or brominated styrene.
3, electric equipment as claimed in claim 1 is characterized in that, described electronic component is a film capacitor.
4, electric equipment as claimed in claim 1 is characterized in that, described electronic component temperature around uses below 120 ℃.
5, electric equipment as claimed in claim 1 is characterized in that, circuit substrate is the high frequency inverter of discharge lamp lighting.
6, electric equipment as claimed in claim 2 is characterized in that, the bromide ion concentration in the electrolyte when electric equipment uses is as below the 2PPM.
7, electric equipment as claimed in claim 1 is characterized in that, described electrolytic capacitor uses under the voltage below the 200V.
CNB2004100769570A 2001-03-30 2002-03-29 Electrical equipment Expired - Fee Related CN100474470C (en)

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JP2007200950A (en) * 2006-01-23 2007-08-09 Fujitsu Media Device Kk Multilayer solid-state electrolytic capacitor
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DE3915455A1 (en) * 1989-05-11 1990-11-15 Roederstein Kondensatoren Aluminium electrolytic capacitor - in which ion exchanger as filler in end cap material prevents catalytic corrosion and increases resistance against halogenated detergent
JPH0763882B2 (en) * 1989-06-26 1995-07-12 株式会社新潟鐵工所 Tool attachment / detachment mechanism
JPH0646012Y2 (en) * 1989-12-12 1994-11-24 東京電気株式会社 Discharge lamp lighting device
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KR100457490B1 (en) 2004-11-17
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CN100484376C (en) 2009-04-29
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CN1576691A (en) 2005-02-09
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HK1049365A1 (en) 2003-05-09
KR100480672B1 (en) 2005-03-31

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