JP2001140709A - Catalyst combustion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a catalyst combustion device which has a catalyst combustion plate on the front side of a vaporization chamber, can seal a heat expanding catalyst combustion plate without generating a clearance, and can be attached to a main body while hardly disturbing heat expansion. SOLUTION: An opening 9 on a front side of a housing (main body) 10 composing a vaporization chamber 12 is composed of a stepped frame part 30. A support surface 31 is formed or supporting a back surface 20b of a catalyst combustion plate 20 along an edge 28. A heat expanding 52 is arranged between the back surface 20b and the support surface 31. The heat expanding gasket 52, being expanded by exposure to high temperature due to combustion test, can prevent occurrence of clearance between the catalyst combustion plate 20 and the support surface 31. Since the heat expanding gasket 52 is arranged along the expanding/contracting surface of the catalyst combustion plate 20, the catalyst combustion plate 20 expands and contracts while keeping sealability hardly causing thermal stress. It is thus possible to provide a catalyst combustion device of a large output causing little leakage of the unturned component and taking advantages catalyst combustion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a catalytic combustion device for catalytically burning a vaporized liquid fuel, and more particularly to a structure for mounting a catalyst plate.

[0002]

2. Description of the Related Art Catalytic combustion, which has a lower combustion temperature than flame combustion and can burn gasified fuel without flame, is known. Catalytic combustion also has various advantages, such as less generation of harmful exhaust gas such as NOx, combustion of a lean mixture, a wide adjustment range of combustion amount, and a large amount of radiant heat. For this reason, the use of catalytic combustion in heating equipment that emits warm air or infrared rays has been studied.

[0003]

In the catalytic combustion device 90 shown in FIG. 6, a catalytic combustion plate 20 is provided at the front 10a of the housing 10, and behind the catalytic combustion plate 20,
A vaporization chamber 12 for vaporizing the sprayed fuel is disposed. In this catalytic combustion device, when catalytic combustion is started, the vaporization chamber 12 is heated by the heat (radiant heat) of the catalytic combustion plate 20, and the liquid fuel is vaporized. Then, the vaporized liquid fuel 71 and the air are supplied to the catalytic combustion plate 20 in a mixed state, and the catalytic combustion is continued. Therefore, the infrared rays 73 can be output stably toward the front 10a of the catalytic combustion device 90. The vaporization chamber 12 has a fuel spray unit 13 for spraying the liquid fuel 70 supplied through the fuel pipe 8,
A blower 15 for sending air for combustion to the vaporization chamber 12 is provided. Prior to catalytic combustion, preliminary combustion is performed using the fuel spray unit 13 as a burner so that the vaporization chamber 12 and the catalytic combustion plate 20 can be heated. It has become. After the temperature of the catalytic combustion plate 20 is raised to the activation temperature, the fuel 71 vaporized by the heat of the catalytic combustion plate 20 can be supplied as described above.

The catalytic combustion plate 20 is a porous plate or an aggregate of a plurality of plates in which a catalyst such as platinum is supported on a carrier (for example, lime aluminate-dissolved silica-ceramics such as titanium oxide). On the other hand, the vaporization chamber 12 is a hollow space formed by a heat-resistant housing (main body or outer shell of the vaporization chamber) 10 made of SUS430 or an aluminum-containing ferrite. Therefore, it is necessary to attach these members having different materials and purposes, that is, the catalytic combustion plate 20 to the housing 10 by any method.

The structure shown in FIG. 7 is one of the constructions in which a ceramic plate is attached to a metal housing, and an L-shaped frame 93 supported from the front 10a along the edge 28 of the catalytic combustion plate 20; A frame portion 30 is provided in a stepped shape so as to support the front portion 10a of the housing 10 along the edge 28 of the catalytic combustion plate 20 from the rear portion 10b. Then, the L-shaped frame 93
Are fixed to the stepped frame portion 30 with bolts and nuts 95, so that the L-shaped frame 93 and the outer frame portion 30 are fixed.
Thus, the catalytic combustion plate 20 can be attached to the housing 10 by supporting the catalytic combustion plate 20 from front and rear.

According to such an attaching method, the catalytic combustion plate 20 can be attached with an appropriate gap C between the catalytic combustion plate 20 and the outer frame portion 30 made of metal. There is an advantage that no stress is generated even if the expansion or contraction occurs and damage to the catalytic combustion plate 20 can be prevented. On the other hand, if the gap C is open during combustion, unburned fuel leaks from this gap, lowering the combustion efficiency, causing flaming combustion at the front of the catalytic combustion plate, causing odor, etc. Problems can occur. Further, in assembling, it is necessary to secure the L-shaped plate 93 to the housing 10 with bolts and nuts 95 with an appropriate gap so as to sandwich the catalytic combustion plate 20, which is laborious and requires skill. .

On the other hand, if the catalytic combustion plate 20 is mounted so that no gap is formed between the catalytic combustion plate 20 and the frame portion 30, the thermal expansion of the catalytic combustion plate 20 is not absorbed, which may cause the catalytic combustion plate 20 to crack. In particular, in a catalytic combustion device that generates a large amount of heat, the area of the catalytic combustion plate 20 is large, so that the amount of thermal expansion is large and the force generated thereby is large. Therefore, it is necessary to be able to absorb the thermal expansion and not to create a gap. For this reason, it is conceivable to put an elastic gasket in the gap between the catalytic combustion plate 20 and the frame portion 30, but glass wool, ceramic wool, and the like tend to be thinned (deformed) by being exposed to high temperatures due to combustion heat. There is.
Therefore, a gap is generated.

Accordingly, an object of the present invention is to provide a catalytic combustion device which can absorb the thermal expansion of a catalytic combustion plate and securely seal it when a catalytic combustion plate is mounted on a catalytic combustion device main body (housing). I have. Further, it is another object of the present invention to improve workability in attaching a catalytic combustion plate to a catalytic combustion device main body. It is another object of the present invention to provide a catalytic combustion device that can stably and efficiently perform catalytic combustion without leakage of unburned components even in a high-power catalytic combustion device.

[0009]

Therefore, in the present invention, a heat-expandable gasket is employed, and the heat-expandable gasket is arranged so as to be parallel to the direction in which the catalytic combustion plate mainly expands and contracts. By doing so, the gap in the catalytic combustion device main body is sealed, and expansion and contraction can be absorbed. That is, the catalytic combustion device of the present invention, a catalytic combustion plate for catalytic combustion of the vaporized fuel,
The catalytic combustion plate has a body attached to a front opening, the opening of the body having a support surface for supporting along a rear edge of the catalytic combustion plate, the support surface and the catalyst. A heat-expandable gasket is interposed between the combustion plate and the combustion plate.

A heat-expandable gasket is a gasket having a characteristic of expanding about 3 to 5 times in the thickness direction when heated (about 400 ° C.), and once expanded, tends to expand when the temperature is increased. It is a gasket with. Therefore, a gap does not occur as the gasket becomes thinner as the conventional gasket burns. Conversely, the gap expands when the temperature rises due to catalytic combustion, so that the gap can be eliminated.

Further, since the catalytic combustion plate is flat, the dimensional change due to thermal expansion is mainly in the plane direction. Therefore, in the present invention, instead of inserting a gasket between the outer frame of the apparatus main body and the catalyst plate, which is directly affected by the dimensional change in the surface direction, a support surface is provided for the rear surface, and the heat-expandable portion is provided here. By sandwiching the gasket, the sealing performance can be ensured without affecting the thermal expansion (expansion and shrinkage due to temperature change) of the catalytic combustion plate. In other words, by arranging the heat-expandable gasket so as to be in contact with the back of the catalytic combustion plate, the gasket is arranged in parallel to the dimensional change in the surface direction due to thermal expansion. Can be demonstrated.

Therefore, in the catalytic combustion device of the present invention, since the thermal expansion of the catalytic combustion plate can be absorbed, there is no damage to the catalytic combustion plate, and there is no gap for the vaporized fuel to leak. The catalytic combustion plate can be attached to the catalytic combustion device body. Therefore, it is possible to actually provide a high-power catalytic combustion device utilizing the advantages of catalytic combustion, such as high combustion efficiency, no generation of harmful substances such as odor, and low noise. .

Further, in addition to the support surface, an outer frame portion covering the periphery (side surface) of the catalytic combustion plate is provided on the main body of the catalytic combustion device, and a fixing bracket for intermittently supporting the front surface of the catalytic combustion plate on the outer frame portion. It is desirable to make a hole for passing through.
Thus, the front surface of the catalytic combustion plate can be supported by merely inserting the fixing metal through the hole from the outside of the outer frame portion, so that the catalytic combustion plate can be attached to the catalytic combustion device main body by the fixing metal and the supporting surface. Therefore, the mounting of the catalytic combustion plate becomes very simple. Further, since the catalytic combustion plate is positioned with the hole as a guide, there is no need to adjust the backlash or the like. Therefore, mounting work can be easily performed without skill. Further, since it is only necessary to insert the fixing metal intermittently, the area for covering the front surface of the catalytic combustion plate with the metal fitting can be small. For this reason, there is a merit that a larger area for outputting infrared rays can be secured.

Further, in the present invention, since the heat-expandable gasket is employed, the heat-expandable gasket expands when a test combustion is performed in a factory or the like before shipment. As a result, the catalyst plate is sandwiched between the heat-expandable gasket and the fixture, so that the gap is filled and rattling is eliminated. Therefore, the catalytic combustion plate is not damaged due to rattling or the like in a distribution process.

It is desirable that a bolt or a nut, for example, a projection bolt or a stud bolt, for screwing a fixing bracket, be attached in advance to an outer frame portion of the catalytic combustion device main body. If bolts have been attached in advance, it is only necessary to insert holes in the fixture and tighten the nuts, so that attachment can be made even easier.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view showing a schematic configuration of a catalytic combustion device according to the present invention. The catalytic combustion device 5 of the present example is a cylindrical housing (main body) extending in the horizontal direction.
A front side 10a of the housing 10 becomes an opening 9 and has a substantially rectangular catalytic combustion plate 2 facing the outside.
0 is attached. The catalytic combustion plate 20 is an aggregate of catalytic plates in which a catalyst such as platinum is supported on a carrier (for example, lime aluminate-dissolved silica-ceramics such as titanium oxide), and the liquid vaporized in the rear vaporization chamber 12 is provided. The fuel can be catalytically burned. Therefore, the catalytic combustion plate 20 shown on the front surface 10a of the housing 10
Is a radiation surface of the infrared ray 73.

Behind the catalytic combustion plate 20, there is provided a vaporization chamber 12 for vaporizing the liquid fuel 70 by the radiant heat of the catalytic combustion plate 20, similarly to the catalytic combustion device 90 described with reference to FIG. The vaporization chamber 12 is made of SUS
This is a hollow space covered by a member corresponding to the main body of the catalytic combustion device 5 such as a heat-resistant housing 10 or an outer shell (shell) such as 430 or an aluminum-containing ferrite. A fuel tank (not shown) is connected to a fuel pipe 8 and a fuel pump 7 behind the vaporization chamber 12.
Spraying unit 1 for spraying liquid fuel 70 supplied by fuel
3. A blower 15 for sending combustion air to the vaporization chamber 12 is provided. Further, in the vaporization chamber 12 of the present embodiment, the porous radiating plate 19 faces the rear surface 20b of the catalytic combustion plate 20.
Are arranged substantially parallel to each other, directly receive the radiant heat of the catalytic combustion plate 20, and the temperature rises due to catalytic combustion. For this reason,
Vaporization of the fuel supplied to the vaporization chamber 12 is promoted, and the configuration is such that catalytic combustion is easily maintained stably.

FIG. 2 shows the housing (catalyst combustion device main body).
FIG. 10 is an enlarged cross-sectional view of a portion where the catalytic combustion plate 20 is attached to 10. The periphery of the opening 9 in the front 10a of the housing 10 is a frame (frame structure) 30 which is processed in a stepwise manner in a direction expanding toward the front 10a. The frame portion 30 has a support surface 31 facing the edge 28 of the back surface 20 b of the catalytic combustion plate 20, and an inverted L-shape extending from the support surface 31, and a surface (side surface) around the catalytic combustion plate 20.
An outer frame portion 32 that covers the outer frame portion 20c and an overhang portion 33 that opens outward from the outer frame portion 32 are further provided, and a fixing bracket 60 is passed through a boundary portion between the outer frame portion 32 and the overhang portion 33. Hole 35 is open intermittently. Then, between the support surface 31 and the back surface 20b of the catalytic combustion plate 20,
A heat-expandable gasket 52 such as an Intram mat of Sumitomo 3M is sandwiched. The heat-expandable gasket 52 is a heat-expandable ceramic material, and when heated to about 400 ° C., expands in thickness about 3 to 5 times.

On the other hand, the front surface 20a of the rim 28 of the catalytic combustion plate 20 is held down by a substantially L-shaped fixture 60 inserted through the mounting hole 35 of the frame portion 30. Therefore, in the catalytic combustion device 5 of the present embodiment, the catalytic combustion plate 20 is supported by the support surface 31 of the frame 30 from the rear via the thermal expansion gasket 52, and is inserted into the mounting hole 35 of the frame 30 from the front. It is supported by the fixed metal fitting 60. An appropriate gap (clearance) C is secured between a peripheral surface (side surface) 20 c of the catalytic combustion plate 20 and the outer frame portion 32 so that the thermal expansion of the catalytic combustion plate 20 can be absorbed. Has become. In addition, since the back surface 20b of the catalytic combustion plate 20 is supported by the support surface 31 via the thermally expandable gasket 52 arranged along the surface, there is no gap leading to the vaporization chamber 12. Further, the catalytic combustion plate 20
Expands and contracts in the plane direction, that is, the direction along the support surface 31, depending on the temperature. The thermally expandable gasket 52 is arranged along the expanding and contracting direction. Therefore, the expansion of the catalytic combustion plate 20 is not significantly hindered, and the catalytic combustion plate 20 is not damaged by the stress of thermal expansion.

As shown in FIG. 2, the catalytic combustion plate 20 of this embodiment has a configuration in which a plurality of catalytic plates 22 are combined in a plane. Since the individual catalyst plates 22 are made of ceramic as described above, each of the catalyst plates 22 is housed in a frame 25, and the frame 25 is connected by spot welding to form a large-area catalytic combustion plate 20. The thermally expandable gasket 50 is also sandwiched between the frames and between the frame and the catalyst plate 22, so that the gasket 50 expands when exposed to a high temperature such as a combustion test so that no gap is generated. .

The mounting structure of the catalytic combustion plate 20 of the catalytic combustion device 5 of the present embodiment will be described in more detail with reference to FIGS. FIG. 3 is an exploded view showing how the catalytic combustion plate 20 is attached to the frame portion 30.
First, the thermally expandable gasket 52 and the catalytic combustion plate 20 are attached to the frame 30 so that the thermally expandable gasket 52 is sandwiched between the support surface 31 of the frame 30 and the back surface 20b of the edge portion 28 of the catalytic combustion plate 20. Attach. Next, the frame 3
The claw 62 of the L-shaped fixing bracket 60 is inserted through the mounting hole 35 provided in the outer frame 32 of No. 0. In the vicinity of the mounting hole 35 of the outer frame portion 31, a projection bolt 68 for screwing the fixing bracket 60 is mounted in advance along with the mounting hole 35 by welding or the like. Therefore,
The forked part 61 of the fixing bracket 60 is set on the frame 30 so that the projection bolt 68 passes therethrough, and the fixing bracket 60 is fixed to a predetermined position of the frame 30 simply by attaching a nut 69 to the projection bolt 68. Can be.

FIG. 4 shows an outline of an L-shaped fixture 60. The fixing bracket 60 of the present embodiment has a flat plate-shaped portion 63 that is divided into two branches and serves as a mounting portion 61 through which a bolt passes.
And L from the bifurcated portion of the flat portion 63
The whole is an L-shaped fitting including a claw 62 projecting in a letter shape and being inserted into the mounting hole 35 of the frame portion 30. Frame part 3 of this example
At 0, the mounting holes 35 and the stud bolts 68 are prepared so that the claws 62 of the fixing bracket 60 hang on the boundary portions of the catalyst plates 22 constituting the catalytic combustion plate 20. Therefore, when the claw 62 is inserted into the mounting hole 35 and the nut 69 is fitted and fixed to the stud bolt 68, one claw 62 is engaged with the frame 25 of the adjacent catalyst plate 22, and the other claw 62 is connected to the other catalyst which is adjacent. It is related to the frame 25 of the plate 22. Therefore, since the plurality of catalyst plates 22 constituting the catalytic combustion plate 20 are individually supported by the fixing bracket 60, the catalytic combustion plate 20 can be supported without imposing a large burden on a portion where the catalytic plate 22 is connected.

FIG. 5 shows a state in which the catalytic combustion plate 20 is attached to the frame portion 30 by the fixture 60 when viewed from the front 10a. In the frame portion 30, mounting holes 35 are formed at positions where the catalyst plates are intermittently connected.
Are opened, and the claws 62 of the fixture 60 are inserted into the holes 35 so that each of the claws 62 is
0 is applied to each of the catalyst plates 22. Therefore, it is possible to support the individual catalyst plates 22 without fail in the portion along the frame portion 30 by a very simple operation, and a large load is imposed on the spot welding 29 connecting the catalyst plates 22 and the like. Instead, the catalytic combustion plate 20 can be attached to the frame 30. Further, the fixing bracket 60 intermittently contacts the catalytic combustion plate 20, and of the surface of the catalytic plate 22,
The portion covered by the claws 62 is very small and almost only contacts the frame 25. Therefore, there is hardly any catalyst covered by the fixture 60, and by attaching the fixture 60, the area for generating infrared rays is reduced, and there is little area or space that is wasted in performing catalytic combustion. Therefore, the catalytic combustion plate 20 can be attached without affecting the combustion efficiency or in a state where the combustion efficiency is high.

As described above, in the combustion device 5 of the present embodiment, the heat-expandable gasket 5
The catalytic combustion plate 20 is attached between the metal fitting 2 and the fixture 60. Then, a series of combustion tests are performed before shipment from the factory. That is, prior to catalytic combustion, preliminary combustion is performed using the fuel spray unit 13 as a burner, and the vaporization chamber 12, the radiation plate 19, and the catalytic combustion plate 20 are heated, and the temperature of the catalytic combustion plate 20 is set to about 300 to 400 ° C. To the activation temperature. Next, once the supply of fuel is stopped to stop the combustion, the fuel is again supplied to the fuel spray unit 13 and the liquid fuel vaporized in the vaporization chamber 12 by the heat of the catalytic combustion plate 20 or the radiation plate 19 is subjected to catalytic combustion. The catalyst is sent to the plate 20 to perform catalytic combustion. Therefore, in the course of this combustion test, the heat-expandable gasket 52 is heated,
Swell 5 times. For this reason, as shown in FIG. 2, the catalytic combustion plate 20 and the support surface 31 or the claw 6
Even if there is a gap between the gasket 52 and the
Is expanded, so that the space between the back surface 20b of the catalytic combustion plate 20 and the support surface 31 of the frame 30 is securely sealed. Further, since the thermally expandable gasket 52 expands, the catalytic combustion plate 20 is pressed against the claws 62 of the fixing bracket, and the rattling is eliminated. Therefore, in the catalytic combustion device 5 of the present example, the sealing operation of the catalytic combustion plate 20 is completed by conducting a combustion test before shipment, and the catalytic combustion device 5 can be shipped with little rattling. Further, when the heat-expandable gasket 52 first expands, it may generate an unpleasant odor, and this odor can be removed at the stage of a manufacturer's combustion test. Therefore, there is no effect when actually used by the user. As described above, the catalytic combustion device 5 of this example is a stage where the performance is confirmed by the combustion test and also a final stage of the assembling process.

Further, when the user uses the catalytic combustion device 5, the catalytic combustion plate 20 is repeatedly heated. However, the heat-expandable gasket 52 has a characteristic of repeatedly expanding and does not become thin by heating. Therefore,
Even when the catalytic combustion is repeatedly performed, no gap is formed between the catalytic combustion plate 20 and the frame portion 30 or the housing 10, and unburned components are not released from the gap. Therefore, it is possible to provide a catalytic combustion device that sufficiently utilizes the merit of catalytic combustion, in which combustion efficiency is good and clean and quiet combustion is obtained.

The heat-expandable gasket 52 includes a back surface 20b of the catalytic combustion plate 20 and a support surface 3 along the back surface 20b.
It is installed so as to be sandwiched between the two. Accordingly, the catalytic combustion plate 20 thermally expands in the surface direction, but expands and contracts in the direction along the thermally expandable gasket 52, so that the presence of the thermally expandable gasket 52 does not hinder so much, and the sealability is maintained. It moves in the plane direction along the support surface 31. For this reason, stress due to thermal expansion hardly occurs. Therefore, it is possible to prevent the catalytic combustion plate 20 from being damaged by thermal expansion. In particular, in the case of the catalytic combustion plate 20 having a large area in which the plurality of catalyst plates 22 are combined in a plane and having a large heat output as in the present embodiment, the thermal expansion also increases. ,
Even if the thermal expansion becomes a large value, it can be attached to the housing 10 without damaging the catalytic combustion plate 20.
As described above, it is possible to prevent a gap from being generated between the housing 10 and the housing 10. Therefore, it is possible to provide a high-power catalytic combustion device 5 having high combustion efficiency and obtaining clean combustion gas.

Further, in the catalytic combustion device 5 of the present embodiment, the catalytic combustion plate 20 can be mounted on the housing 10 only by inserting the fixing bracket 60 from the outside of the frame 30 and screwing it.
No troublesome work such as turning a screw from the inside as shown in FIG. 7 is required. Therefore, there is no danger of damaging the catalyst surface during assembly work,
Work efficiency is improved. In addition, the portion that blocks the front surface of the catalytic combustion plate 20 by the fixing bracket 60 can be minimized, and the portion that is difficult to move due to the fixing bracket 60 can be minimized. For this reason, it is possible to fix the catalytic combustion plate 20 so as to minimize the thermal stress without hindering the irradiation of infrared rays. Further, since the mounting hole 35 for inserting the fixing bracket 60 is opened in the frame 30 in advance, it is not necessary to adjust the position of the fixing bracket 60. On the other hand, when heated, the heat-expandable gasket 52 expands, so that the catalytic combustion plate 20 can be mounted at a predetermined position without play.
Therefore, such adjustment is not required. Therefore, the assembly can be performed easily and in a short time without skill, and a low-cost catalytic combustion device with a short delivery time can be provided.

[0028]

As described above, in the catalytic combustion device according to the present invention, the catalytic combustion plate is mounted with the thermally expandable gasket interposed between the back surface of the catalytic combustion plate and the support surface of the body frame. ing. Therefore, when exposed to a high temperature in a combustion test before shipping, the thermally expandable gasket expands, and it is possible to prevent a gap from being generated between the catalytic combustion plate and the housing. On the other hand, since the heat-expandable gasket is arranged in the surface direction where the catalytic combustion plate thermally expands, the catalytic combustion plate can easily repeat expansion and contraction due to a temperature change, and also maintains the sealing property. be able to. Therefore, in the catalytic combustion device of the present invention, the catalytic combustion plate can be thermally expanded without stress, and the catalytic combustion plate can be attached to the housing in a state where no gap is generated. Therefore, according to the present invention, the advantages of catalytic combustion, which is high in combustion efficiency, low in noise, safe with no generation of flame, and hard to generate harmful unburned components such as odors, are maximized. Thus, it is possible to provide a catalytic combustion device having a large heat output.

Further, in the present invention, a configuration is disclosed in which the catalytic combustion plate can be fixed simply by inserting a fixing bracket from the outside of the frame supporting the catalytic combustion plate, whereby the catalytic combustion plate can be easily attached. Thus, it is possible to provide a catalytic combustion device with good assembling workability.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a schematic configuration of a catalytic combustion device according to the present invention.

FIG. 2 is an enlarged sectional view showing a portion where a catalytic combustion plate is attached to a catalytic combustion device main body (housing) via a fixing bracket.

FIG. 3 is an expanded view showing a state where a catalytic combustion plate is mounted on a housing via a fixture.

FIG. 4 is a view showing a schematic configuration of a fixing bracket, and FIG.
4A is a perspective view, FIG. 4B is a front view as viewed from the direction of the nail, and FIG. 4C is a plan view as viewed from above.

FIG. 5 is a front view showing a state in which the catalytic combustion plate is supported by a fixture.

FIG. 6 is a diagram showing a schematic configuration of a catalytic combustion device.

FIG. 7 is a diagram illustrating an example of a structure in which a catalytic combustion plate is attached to a main body of the catalytic combustion device.

[Explanation of symbols]

5, 90 Catalyst combustion device 9 Opening 10 Housing (main body) 10a Housing front 12 Vaporization chamber 13 Fuel spray unit 15 Blower 19 Radiation plate 20 Catalyst combustion plate 20a Front surface (radiation surface) of catalyst combustion plate 20b Back surface 20c Side surface 22 Catalyst plate Reference Signs List 25 frame of catalyst plate 28 edge portion of catalyst combustion plate 29 spot welding connecting frame of catalyst plate 30 frame portion of housing 31 support surface 32 outer frame portion 33 overhanging portion 35 mounting hole 50, 52 thermal expansion Gasket 60 Fixing bracket 61 Bifurcated part through which bolt passes 62 Claw 63 Part supporting claw 68 Projection bolt 69 Nut

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shoichi Muraoka 246 Sachitaka, Oaza, Suzaka City, Nagano Prefecture Inside Orion Machinery Co., Ltd. (72) Inventor Satoshi 246 Sachika, Sazaka, Suzaka City, Nagano Prefecture Inside Orion Machine Co., Ltd. (72) Inventor Atsushi Nishino 246 Koyuki, Sazaka, Nagano Prefecture Inside Orion Machinery Co., Ltd.

Claims (4)

[Claims] 1. A catalytic combustion plate for catalytically combusting vaporized fuel, and a main body having the catalytic combustion plate attached to a front opening, the opening of the main body being provided on a rear surface of the catalytic combustion plate. A catalytic combustion device, comprising: a support surface for supporting along an edge; and a thermally expandable gasket sandwiched between the support surface and the catalytic combustion plate. 2. The apparatus according to claim 1, wherein the main body includes an outer frame portion that covers a periphery of the catalytic combustion plate, and a fixing metal that supports the front surface of the catalytic combustion plate intermittently is passed through the outer frame portion. A catalytic combustion device characterized by having holes. 3. The catalytic combustion apparatus according to claim 2, wherein a bolt or a nut for screwing the fixing bracket is attached to an outer frame portion of the main body in advance. 4. The method according to claim 1, wherein
A catalytic combustion device, wherein a vaporization chamber for vaporizing liquid fuel is provided behind the opening of the main body.