DE2227392A1 - FLOW HEATER - Google Patents

Description

Patent attorney Dipl.-Ing. Walter JackiseK OOO7QQ9 ZSluttflartN.Menzefctreße « Li-L · I OOC.

Heimo-Gerätebau A ^ 2 9θ \ - sü

Limited liability company 7972 ISNY / Allgäu

Max-Eyth-Weg H2. The | 5 yrs _{and h972}

Water heater

The invention relates to water heater for water or the like. J particular for the hot water and / or hot water supply of households with a arranged in a combustion chamber Benner, for example a gas burner and a angefjchlossenen at its exhaust system heat exchanger, and with a combustion air supply from outside of the burner in the Combustion chamber.

The invention is based on the object of a water heater to train this type so that with simple space-saving on construction and easier assembly or maintenance high performance is guaranteed.

This is achieved in a water heater of the type described above according to the invention in that the heat exchanger is provided at the end of the combustion chamber opposite the burner and that of the Eeizkammer of the heat exchanger at its facing away from the combustion chamber Side an exhaust collector is connected ', wherein in the area of the combustion air supply and the exhaust gas duct Sound attenuators are provided. This will also achieves the essential advantage that the rotation -

309881/0026 _{or similar}

- BAD ORIGINAL

heater works very quietly, so that it is directly in a room of the household to be supplied can be arranged and does not have to be housed in the basement or another separate room.

A particularly compact structure and easy accommodation of the flow heater at the place of use will be achieved when the combustion chamber with the heat exchanger and / or the exhaust gas amriler / lies in a common axis. The combustion chamber and / or the heating gas chamber of the heat exchanger and / or the exhaust gas collector can essentially be cylindrical. To further improve the compact structure, a housing surrounding the combustion chamber has, for example same external cross-section as the exhaust manifold.

In order to have a particularly favorable Heizbzw. To achieve exhaust gas routing is the heating gas chamber the cross section of the heat exchanger is reduced compared to the housing surrounding the combustion chamber and / or the exhaust gas collector, where they are preferably via funnel-like widened end sections in the housing of the Bimnkammer and / or passes over the exhaust manifold.

Maintenance, for example cleaning the water heater, can be made much easier in that the heating gas chamber of the heat exchanger is detachable with the housing surrounding the combustion chamber and / or the exhaust manifold is connected, preferably the respective end section on the G-ehäuses of the combustion chamber or on the exhaust manifold is attached. To secure the Heizkamrner with a strap or the like. On which the. Surrounding combustion chamber Housing and / or attached to the exhaust manifold.

BATH ORIGINAL

3098 8 1/0026

A particularly quiet forwarding of the exhaust gases is achieved if the exhaust gas collector is responsible for the exhaust gas routing has an annular channel, which is preferably provided with a lining on the inside and / or outside is made of sound-absorbing material. A very favorable heating gas guidance in the heat exchanger is included guaranteed if the diameter of the ring channel is smaller than the smallest diameter of the heating gas chamber of the heat exchanger. For easy removal of exhaust gases the annular channel opens into an annular space surrounding it in the region of its end facing away from the heat exchanger, from from which an exhaust pipe is led away. Expedient the lining of sound-absorbing material located on the inside of the ring channel approximately over the entire axial extension of the annular space, preferably one end of which is formed by the lining surrounding the annular channel, so that an optimal gives a sound-absorbing effect. The walls of the annular channel are advantageously gas-permeable, preferably as Perforated plates formed so that the exhaust gases come into direct contact with the lining. To this end can the lining also on the end face facing the heat exchanger on a gas-permeable, preferably through an end wall formed by a perforated plate.

So that the burner to achieve the best possible Brandes can easily be set to four, it is axially adjustable and mounted so that it can be fixed, it being expediently located in the axis of the combustion chamber. . ■

BATH ORIGINAL 3098 81/0026

To further facilitate the cleaning and maintenance of the flow heater, the combustion chamber and the one surrounding it Housing releasably connected to one another, and preferably releasably attached to a transition piece. Furthermore can the end wall, preferably forming the bottom, of the housing surrounding the combustion chamber releasably on the housing jacket, in particular be attached by clipping.

A particularly advantageous development, in particular a water heater of the type described is achieved in that a fan in the combustion air supply is arranged and that the combustion air supply on the outside / over the combustion chamber and adjacent to this at least is deflected once. As a result, a significant increase in performance can be achieved with small dimensions will; furthermore, there is only a relatively low level of sound radiation.

To further reduce the dimensions, the combustion air supply at least one the. Ring channel surrounding the combustion chamber, preferably two coaxial to the combustion chamber Annular channels through which the diameter of the water heater is only slightly increased. For one favorable fire, it is useful if the largest air or Gas pressure in the inner ring channel is greatest, what, for example can be achieved in that the flow cross-section of the innermost annular channel is smallest.

The respective annular channel is advantageous as an axial flow channel formed, wherein preferably adjacent annular channels have opposite flow directions, so that there are relatively long lines for the air of renunciation result.

BAD ORfGJNAL

~ 5 3098 81/0026

To further reduce the development of odors, the fan is connected to the suction side and the pressure side connected to the combustion air supply, so that the intake and exhaust area of the fan can be completely closed to the outside, and therefore only an extremely small amount of sound radiation he follows.

For the entry of the air into the combustion air supply expediently has an annular channel, preferably in the end wall of the facing away from the heat exchanger the housing surrounding the burner at least / into the open air intake opening, in particular several Air intake openings provided on a ring around the duct axis. To achieve a simple air flow v / eist an outer, in particular the outermost ring channel, the air intake openings, so that the Air passes from the outer ring channel to the adjacent inner ring channel.

Eire results in a further reduction in noise generation if the housing surrounding the combustion chamber has an air calming space in connection with the air intake opening forms, which is preferably provided between the end wall of the housing and that of the combustion chamber.

The suction side of the fan can easily be connected to an annular channel, preferably to the Air intake openings having Rirg canal, preferably be connected in the area of the end facing away from the air intake openings, so that an annular channel is a Forms intake duct for the fan. Furthermore, the fan can be easily accessed on the outside of the combustion chamber surrounding housing is provided and preferably via at least one connection piece that is radial to the combustion chamber Combustion air supply must be connected.

3098 81/0026

In order to be able to safely supply the combustion air to the combustion chamber, the air immediately surrounding the combustion chamber is used Annular channel into a space located on the end face of the combustion chamber having the burner, with in this end face of the combustion chamber air inlet openings are provided .. The air inlet openings can be used for Achieve a uniform supply of air surround the burner " To make the combustion air good with the fuel to be able to mix are in the area of the air inlet openings Dralleitglicder, in particular inclined sheet metal tabs provided.

The fan could also be installed directly in the reservoir or Air calming space can be provided between the end wall of the combustion chamber and that of the housing surrounding it. The ring channel or the ring channels could also be inserted or meh.c & ch in Individual channels can be subdivided so that the air could be guided back and forth in one and the same ring channel.

A further substantial reduction in the development of noise or sound radiation can thereby be achieved that the combustion air supply is at least partially covered with a sound-absorbing material is provided, preferably at least one ring channel, in particular all ring channels with a cladding sound-absorbing material are provided. For example, a cladding jacket can be provided between adjacent ring channels, which is preferably on the burner having end face of the combustion chamber forms an end wall, so that the combustion chamber completely from a cup-shaped Disguise mantsl surround i '- "t and thus also them Burner noises are strongly attenuated. Furthermore, the housing surrounding the combustion chamber, preferably on the inside with a cladding made of sound-absorbing material provided sän, in particular directly the outer wall

S09881 / ÖO2S

of the outermost ring channel and thus another Represents silencer jacket.

To preheat the combustion air, is the inner wall of the innermost ring channel is formed directly by the metallic combustion chamber wall.

A further simplification in the structure of the water heater is achieved in that the connections of the fan to the combustion air supply approximately in the same way in the axial area of the combustion chamber, preferably with the pressure connection slightly offset towards the burner is provided.

According to a further feature of the invention are in the combustion chamber jacket, preferably approximately in the axial area in which the pressure connection of the fan is in the innermost - Annular duct opens, air inlet openings for secondary air provided, whereby an even better fire can be achieved.

The invention is explained in more detail below with further details] the drawings approximate an exemplary embodiment with the parts essential for the invention to scale again. These parts are, insofar as they cannot be readily taken from the drawings, explained on the basis of the drawings »They are shown in

Fig. 1 · a flow heater according to the invention in axial section;

FIG. 2 is a section along the line II-II in FIG. 1 in a representation rotated by 90 °.

- 8 309881/0026

As FIGS. 1 and 2 show, an inventive Water heater a burner part 1, one on the same axis overlying heat exchanger 2 and one again on the same axis overlying exhaust manifold 3, these three parts 1 to 3 being detachably connected to one another.

The burner part 1 has a cylindrical housing 4 provided, which is formed substantially open at the top, this housing 4 at the top of overlapped a heating gas chamber housing 5 of the heat exchanger 2 is, which has a funnel-like widened section 6 at the lower end, with its cylindrical The end part engages over the housing 4. At the upper end, the heating gas chamber 5 is likewise enlarged in the manner of a funnel Part 7, which with a cylindrical end portion, the cylindrical housing 8 of the exhaust manifold 3 at its lower Encompassing the end. To the cylindrical end parts of the heating gas chamber 5, tightening straps, not shown in detail, can be used be arranged, through which the parts 1 to 3 of the water heater are secured against each other.

The combustion chamber part 1 has a lying in the housing cylindrical, pot-shaped combustion chamber 9 made of sheet metal or the like. on, the bottom wall 10 is below and at their oteren End angled tabs 11 are provided, with which the combustion chamber 9 with screws 12 is detachable on a transition piece 13 is attached, which in turn serves to attach the burner part 1 to the heating gas chamber 5. Coaxial around the combustion chamber 9, a further, cylindrical jacket 14 made of perforated sheet is arranged at a slight distance, which has a spherically downwardly curved bottom I5 at the bottom, such that between the Floor 10 of the combustion chamber 9 and this floor I5 a space between the combustion chamber 9 and the jacket 14 an annular channel 17 is formed which extends approximately over the entire height of the combustion chamber 9. The coat 14 is in the upper one Area with outwardly angled tabs 17 with the help

309881 / (^ 026

of the screws 12 also attached to the transition piece XJ> , so that the combustion chamber 9 and the jacket 14 can easily be detached from one another as well as from the transition piece 15. The jacket 14 can also be formed by a gas-impermeable jacket, for example made of sheet metal, instead of a perforated plate.

The jacket 14 is rat radial distance from a gas-permeable cylindrical perforated sheet metal jacket 19 lying on the same axis as the combustion chamber 9, the bottom wall 20 is formed by a gas-impermeable disk-shaped flat sheet. The space between the jackets 14 and 19 is Completely filled with a cladding made of sound-absorbing material, which extends up between the floor walls 15, 20 is enough and forms an end wall 22 there. Between the perforated sheet metal jacket 39 and the jacket 25 of the housing 4 a further ring channel 24 is formed, the jacket 2 ^ of the housing 4 is provided on the inside with a cladding 25 made of scha11dämmendem material, which directly the outer wall of the annular channel 24 forms.

The bottom 26 of the housing 4 is secured by a removable * downward or outwardly curved lid formed on the the jacket 23 of the housing 4 is easily detachably attached from below is and also has a cladding 27 made of sound-absorbing material on the inside. In this Bottom covers 26 are on a ring around the axis of the burner part 1, several axially parallel air intake openings 28 provided, the diameter of the rim being flat these openings 28 are smaller than the diameter of the annular channel 24 and larger than that of the annular channel 18.

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309881/0026

In the upper area let on the housing shell 23 a radial Fastened nozzle 29, which opens into the upper end of the outer annular channel 24 and to which directly an electrical Motor & blower 30 to be operated is attached. Urn 90 ° to Stub 29 offset and compared to this slightly lower, another radial stub 31 is provided, which the Housing jacket 23 and the insulating jacket 21 penetrated and opens into the inner annular channel 18, with this nozzle

31 the pressure side of the fan 30 is connected.

Through the bottom 10 of the combustion chamber 9 below a lying in the axis of the "burner part 1 burner 32 i with a rubber-elastic sleeve 33 ⁿ protrudes from the bottom I5, the casing 14, is suspended 19 and is adjustable with a thread 34 in the axial direction The lower part of the burner

32 lies in your downwardly closed by the housing cover 26 Space 35 of the housing 4j leading to the burner 32 Fuel line 36 penetrates the housing shell 22 in the lower area. To the burner 32 are in the bottom 10 of the Combustion chamber 9 provided air inlet openings, not shown, above which on the bottom 10 inclined swirl baffles 37 are provided, through which the entering air is imparted a swirl around the combustion chamber axis.

The air sucked in by the fan 30 flows through the air intake openings 28 into the calming chamber 35 of the housing 4, from there into the outer annular channel 24, then through the fan and through the connecting piece 3I into the inner ring channel 18, internally it flows back down into space 16, from which it flows through the air inlet openings enter the combustion chamber 9. in the In the upper region of the combustion chamber 9, inlet openings 38 for secondary air can be distributed over the circumference in its jacket be provided through which your inner annular channel 18 air enters the combustion chamber 9. With the I & r ^ ieb the pressure is im

- "1 -309 * 81/002 6"

outer ring channel 24 smaller than the atmospheric pressure and in the inner ring channel 18 gitßer than atmospheric pressure. The burner J> 2 can be operated with either liquid or gaseous fuels.

In the middle., Cylindrical and opposite in diameter the housing 4 of the combustion chamber part 1 reduced section of the heating gas chamber 5 of the heat exchanger 2 .is a Viasser pipe coil; 59 arranged, the supply line 40 and their derivation 4l from the .Heizgaskanimer 5 for connection are led out to appropriate pipelines,

The housing 8 of the exhaust gas collector 3 has the same diameter as the housing 4 of the burner part 1. In the exhaust manifold · j; there is provided a water heater axis lying in the annular channel 42, coaxially located by two Lochblechmänt ^ l $ K is formed 44th The space between the outer perforated sheet metal jacket 4j and the housing jacket 8 is largely filled with sound-absorbing material -4-5, which is arranged in the form of a sleeve and with the inner circumference the outer perforated sheet metal jacket 43 and with the outer circumference the housing jacket. 8 touched. In the inner perforated sheet metal jacket 44 a complete filling 46 with sound-absorbing material is also provided, which extends as far as the cover 47 of the housing 8 of the exhaust gas collector 3, which is located at the top. Immediately below the sound-insulating material parts 45, 46, a flat end wall 48 made of perforated sheet metal is provided, which forms the lower part of the housing 8. The sleeve-shaped sound-absorbing part 45 does not extend all the way to the housing cover 47, so that an annular space 49 is formed around the annular duct 42 in the upper region of the housing 8, into which the exhaust gas can enter from the annular duct 42. An exhaust gas nozzle 50 is connected to this annular space 49, which is fastened to the cover 47 and protrudes upwards parallel to the axis.

309881/08 2 ¹ S -

BATH ORIGINAL

The fuel gases flow when the water heater is in operation from the combustion chamber 9 upwards on the pipe coils 29 over and then into the annular channel 42, from where they come over the annular space 49 through the exhaust port 50, for example get into a chimney.

- 15 - (patent claims) 309881/0026

Claims (5)

A 32,964 - sweet ^the I 5 June 1972 Claims ~ 1Λ instantaneous water heater for V / ater or dJU, especially for the hot water and / or heating water supply of households, with a burner arranged in a combustion chamber, for example a gas burner and a heat exchanger connected to its exhaust gas duct, as well as with a combustion air supply from outside the burner into the combustion chamber, characterized in that that the heat exchanger (2) is provided at the end of the combustion chamber (9) opposite the burner (32) and that to the heating gas chamber (5) of the warning device (2) to its an exhaust gas collector (3) is connected from the side facing away from the combustion chamber, wherein in the area of the combustion air supply (28, 24, 18, 16) and the exhaust gas duct (42) silencer members (21, 25, 27, 45, 46) are provided. 2. Water heater according to claim 1, characterized in that the combustion chamber (9) with the heat exchanger (2) and / or the exhaust manifold (3) lies in a common axis. 3 · heater according to claim 1 or 2, characterized in that the combustion chamber (9) and / 8If ^r heating gas chamber (5) of the heat exchanger (2) and / or the exhaust gas collector (3) are substantially cylindrical (is). 4. Heater according to one of the preceding claims, characterized in that a combustion chamber (9) surrounding it Housing (4) has approximately the same external cross-section as the exhaust manifold (3). - 14 -309881/00 2 6 bad original 5. Heater according to one of the preceding claims, characterized in that the Heizgaskammur (5) des Heat exchanger (2) in cross section compared to the housing (4) surrounding the combustion chamber (9) and / or the Exhaust manifold (3) is reduced, preferably each having a funnel-like widened end section (6 or 7) in the housing (4) of the combustion chamber (9) and / or merges into the exhaust manifold (J). 6. Heater according to one of the preceding claims, characterized in that the heating gas chamber (5) of the Heat exchanger (2) detachable with the housing (4) surrounding the combustion chamber (9) and / or the exhaust gas collector (3) is verbtmden, preferably the respective end section (6 or 7) is slipped onto the housing (4) of the combustion chamber (9) or onto the exhaust manifold (3). 7. Heater according to one of the preceding claims, characterized in that the Keizgaska ^ mer (5) with a tension band or the like. Ηώ. to which the combustion chamber / emitting housing and / or to the exhaust manifold (3) is attached, 8. Heater according to one of the preceding claims, characterized in that the exhaust manifold (3) for the exhaust gas duct has an annular channel (42), which is preferably on the inside and / or outside with a lining (4β or 45) made of sound-absorbing Material is provided. 9 · Heater according to claim 8, characterized in that that the diameter of the hanging canal (■ '!?) is smaller than the smallest diameter of the core gas ducts (5) of the heat exchanger (2) is BATH ORIGINAL 10. Heater according to claim 8 or 9 ₃ characterized in that the annular channel (42) in the region of its end facing away from the heat exchanger (2) opens into a surrounding annular space (49) from which an exhaust gas nozzle (50) is led away. 11. Heater according to one of claims 8 to 10, characterized in that the lining (k6) located on the inner side of the annular channel (42) of sound-absorbing material extends approximately over the entire axial extension of the annular space (49) and vorzugswdse one end of the the lining (45) surrounding the annular channel (42) is formed. 12. Heater according to one of claims 8 to 11, characterized in that that at least one "wall, in particular both walls of the annular channel (42), is gas-permeable, preferably are designed as perforated plates (4 ^, 44). 15. Heater according to one of claims 8 to 12, characterized in that that the lining (45 or 46) on the dem Heat exchanger (2) facing end face on a gas-permeable, preferably formed by a perforated plate (48) Front wall rests. 14. Heater according to one of the preceding claims, characterized characterized in that the fuel nozzle (32), preferably in the axis of the combustion chamber (9), is axially adjustable and is mounted fixable. 15. Heater 'according to one of the preceding claims, characterized in that the combustion chamber (9) and that surrounding it Housing (4) are releasably connected to one another and preferably releasably attached to a transition piece (Ij). _X 5 BATH ORIGINAL 309881/0026 16. A heater as in any one of the preceding claims, characterized in that the, preferably forming the bottom end wall (26) of the combustion chamber (9) surrounding ^ü ehäuses (4) is detachably * attached to the casing (23), in particular by plugging. 17 · Heater, especially after one of the previous ones Claims, characterized in that a fan (j5) is arranged in the combustion air supply and that the combustion air supply on the outside sowing the combustion chamber (9) and adjacent to this is deflected at least once. 18. Heater according to one of the preceding claims, characterized in that the combustion air supply at least one ring channel surrounding the combustion chamber, preferably two to the combustion chamber (9) having coaxial annular channels (18, 24). 19. Heater according to one of the preceding claims, characterized in that the flow cross section the combustion air supply to the combustion chamber (9) decreases, the innermost annular channel (18) preferably having the smallest flow cross section. 20. Heater according to claim 18 or I9 * characterized in that that the respective annular channel (18 or 24) as an axial flow channel is formed, wherein preferably adjacent annular channels have opposite flow directions. 21. Heater according to one of claims 17 to 20, characterized characterized in that the fan (30) with the suction side and the pressure side is connected to the combustion air supply. 309881/0026 bath - 17 - 22. Heater according to one of claims 18 to 21, characterized in that an annular channel (24), preferably in the end wall (26) of the housing (4) surrounding the combustion chamber (9) facing away from the heat exchanger (2) at least one air intake opening leading to the outside, in particular several on a ring around the duct axis has provided air intake openings (28). 23. Heater according to one of claims 38 to 22, characterized characterized in that an outer, in particular the outermost, annular channel (24) has the air intake opening (28). 24. Heater according to claim 22 or 23, characterized in that that the housing (4) surrounding the combustion chamber (9) has an air calming space following the air intake opening (28) (35) forms, which is preferably between the End wall (26) of the housing (4) and that of the combustion chamber (9) is provided. 25. Heater according to one of claims 18 to 24, characterized in that the fan (jJO) with its suction side to an annular channel, in particular to the annular channel (24) having the air intake opening (28), preferably is connected in the area of the end facing away from the air intake openings (28). 26. Heater according to one of claims 1? to 25, thereby marked that the fan (jJO) is on the outside of the housing (4) surrounding the combustion chamber (9) and preferably via at least one to the combustion chamber (9) radial connector (29) connected to the combustion air supply 1st. , BAD ORIGINAL 27 · Heater according to one of claims 18 to 26, characterized characterized in that the immediately surrounding the combustion chamber (9) annular channel (18) in one of the Burner (32) having end face of the combustion chamber (9) lying space (16) and that in this Front side (10) of the combustion chamber / air inlet openings are provided. 28. Heater according to claim 27, characterized in that the air inlet openings surround the burner (32). 29 · Heater according to claim 27 or 28, characterized in that that in the area of the air inlet openings twist guide members, in particular inclined sheet metal tabs (37) are provided. 30. Heater according to one of the preceding claims, characterized in that the combustion air supply is at least partially covered with a lining (21 or 25 or 27) is made of sound-absorbing material, preferably at least one ring channel, in particular all ring channels (18, 24) are provided with a cladding made of sound-absorbing material. 31. Heater according to claim 30, characterized in that that between adjacent annular channels (18, 24) a cladding jacket (21) is provided, which is preferably forms an end wall (22) on the end face of the combustion chamber (9) having the burner (32). 32. Heater according to claim 30 or 3I, characterized in that the housing (4) surrounding the combustion chamber (9), preferably on the inside ti, is provided with a cladding (25) made of sound-absorbing material , which in particular directly covers the outer wall of the outermost ring channel (24) forms. 309B81 / 0026 , «BAD ORIGINAL 33 · Heater according to one of claims 18 to 32, characterized characterized in that the inner wall of the innermost annular channel (18) passes directly through the metallic combustion chamber wall formed .1st. 34. Heater according to one of claims I7 to 33 * thereby characterized in that the connections of the fan (30) to the combustion air supply / i in the same axial direction Area of the combustion chamber (9), the pressure connection preferably being offset slightly towards the burner (32) is provided. 35. Heater according to one of the preceding claims, characterized in that air inlet openings (38) for secondary air are provided in the combustion chamber jacket, preferably approximately in the axial area in which the pressure connection of the fan (JO) opens into the innermost annular channel (18). 309881/0026 BATH ORIGINAL