JP7507079B2 - Combustion equipment - Google Patents

Description

The present invention relates to a combustion device. In particular, the present invention relates to a combustion device in which an exhaust pipe is inserted into a slit formed on the protruding surface of the exhaust pipe of the casing body.

Generally, a combustion device such as a water heater has a combustion device main body, a casing main body that has a front opening that opens forward and houses the combustion device main body, and a front cover that covers the front opening of the casing main body. In this type of combustion device, a U-shaped slit that opens forward is provided on the top surface of the casing main body to connect the exhaust pipe to an exhaust tube that protrudes upward from the top surface of the casing main body and discharge the combustion exhaust to the outside, and the exhaust tube is inserted into the slit (for example, Patent Document 1).

JP 2010-38506 A

However, providing a notch on the top surface of the casing body reduces the strength of the top surface around the periphery of the notch. This creates the problem that the casing body may deform if pressure is applied to the casing body from outside the packaging during transport. In particular, the front end of the top surface of the casing body is prone to deformation because it is divided into left and right parts by the notch.

In addition, in Patent Document 1, an exhaust pipe cover is screwed from above to the top surface of the casing body around the slit in order to cover the gap between the exhaust pipe and the front opening. However, because the strength of the top surface around the slit is reduced, when the exhaust pipe cover is screwed to the top surface from above, the top surface bends downward, which reduces workability. Furthermore, if the exhaust pipe cover protrudes outward from the top surface of the casing body as in Patent Document 1, there is also the problem of poor aesthetics.

The present invention was made to solve the above problems, and the object of the present invention is to improve the strength of the casing body against external pressure, and to improve the workability and aesthetics in a combustion device in which an exhaust pipe is inserted into a slit formed in the protruding surface of the exhaust pipe of the casing body.

According to the present invention,
A combustion device body;
a casing body having a front opening that opens forward and that houses the combustion device body;
A front cover that covers the front opening from the front;
an exhaust pipe for discharging combustion exhaust gas from the combustion device body to the outside,
A combustion apparatus in which a slit opening forward is formed on an exhaust pipe protruding surface of the casing body, and the exhaust pipe is inserted into the slit,
a first inner peripheral flange portion and a second inner peripheral flange portion are formed on an inner peripheral edge of the front opening on the exhaust pipe protruding surface side of the casing body, the first inner peripheral flange portion and the second inner peripheral flange portion extending from a front end portion of the exhaust pipe protruding surface toward an inward side of the front opening, with an opening portion of the notch portion sandwiched therebetween;
A combustion device is provided in which a bridging member is fixed to the first and second inner peripheral flange portions so as to straddle the open portion of the notch portion.

According to the above combustion device, the first and second inner flanges sandwiching the opening of the notch are bridged by an installation member that straddles the opening of the notch, improving the strength of the casing body against external pressure. Also, according to the above combustion device, the installation member is fixed to the first and second inner flanges, which have less deflection than the exhaust pipe protruding surface, improving workability. Furthermore, according to the above combustion device, the installation member is fixed to the first and second inner flanges, and by covering the front opening with a front cover, the installation member is positioned between the casing body and the front cover and is not exposed to the outside, improving the aesthetic appearance.

Preferably, in the combustion device,
The bridging member is fixed to the first and second inner peripheral flange portions near a side surface of the casing body away from the open portion of the notch.

According to the above combustion device, the installation member is fixed to the first and second inner flange portions at a position close to the side surface of the casing body, which further improves the strength of the casing body against external pressure. In addition, the first and second inner flange portions at a position close to the side surface of the casing body have less deflection, which further improves workability.

Preferably, in the combustion device,
The installation member and the front cover are formed so that when the front opening is covered with the front cover, the installation member and the front cover are engaged with each other.

According to the above combustion device, the installation member fixed to the first and second inner flange portions engages with the front cover, so that when external pressure is applied to the exhaust pipe protruding surface, the installation member and the first and second inner flange portions are supported by the front cover. This further improves the strength of the casing body against external pressure.

Preferably, in the combustion device,
the installation member has a fixed piece fixed to a front surface of the first and second inner circumferential flange portions, and a bent piece bent from an end of the fixed piece on the inner side of the front opening toward the first and second inner circumferential flange portions,
The bent piece is configured to support the first and second inner circumferential flange portions when the exhaust pipe protruding surface is pressed from the outside.

The above combustion device can improve the strength of the installation member. Furthermore, with the above combustion device, even if external pressure is applied to the exhaust pipe protruding surface, the bent pieces of the installation member support the first and second inner flange portions, so the strength of the casing body against external pressure can be further improved.

Preferably, in the combustion device,
the exhaust pipe protruding surface has a first step portion and a second step portion recessed toward an inner side of the casing body on opposing side edges of the cutout portion,
the installation member has a cover portion extending rearward from a rear surface of the fixing piece so as to cover a gap between the exhaust pipe and the opening of the notch,
The first and second step portions and the cover portion are formed such that a portion of a periphery of the cover portion fits into the first and second step portions.

According to the above combustion device, the first and second step portions are provided on the opposing side edges of the notch portion, which improves the strength of the casing body against external pressure. In addition, according to the above combustion device, a part of the periphery of the cover portion extending rearward from the rear surface of the fixing piece of the installation member fits into the first and second step portions, so that the exhaust pipe protruding surface and the cover portion can be formed approximately flush, improving the aesthetic appearance.

As described above, the present invention provides a combustion device that has high strength against external pressure, and is easy to use and has a good appearance.

FIG. 1 is a schematic diagram showing a combustion apparatus according to an embodiment of the present invention. FIG. 2 is a schematic perspective view showing a state in which a front cover of the combustion apparatus according to the embodiment of the present invention is removed. FIG. 3 is a schematic perspective view showing a state before the installation members of the combustion apparatus according to the embodiment of the present invention are mounted on the casing body. FIG. 4 is a schematic perspective view showing a state after the installation members of the combustion apparatus according to the embodiment of the present invention have been mounted on the casing body. FIG. 5 is a schematic cross-sectional perspective view showing a main portion of a combustion apparatus according to an embodiment of the present invention. FIG. 6 is a schematic perspective view showing an installation member of a combustion apparatus according to an embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE DISCLOSURE Hereinafter, a combustion apparatus according to an embodiment of the present invention will be specifically described with reference to the accompanying drawings.
1 and 2, the combustion device according to this embodiment is a water heater 1 that heats water supplied from a water supply pipe 71 to a heat transfer pipe 23 of a heat exchanger 21 with the combustion exhaust gas from a burner 11, and supplies the water to a hot water supply terminal such as a shower or a faucet (not shown) through a hot water outlet pipe 72. Note that the combustion device main body 100 is omitted in Figs. 2 to 5 to avoid complication.

The water heater 1 has an exterior casing 200, which includes a casing body 2 having a front opening 210 that opens forward, and a front cover 3 that closes the front opening 210 of the casing body 2. In this specification, the front opening side of the casing body 2 is referred to as the front side, and the depth direction of the casing body 2 when viewed from the front side is referred to as the front-rear direction, the direction that intersects the front-rear direction and the horizontal direction is referred to as the left-right direction, and the direction that intersects the front-rear direction and the height direction is referred to as the up-down direction.

The combustion device body 100 is housed within the casing body 2. The combustion device body 100 has, arranged from the bottom, a combustion chamber 10, a heat exchange chamber 20, an exhaust chamber 30, and a blower 50 attached to the left side of the exhaust chamber 30. An exhaust pipe 80 that discharges combustion exhaust gas to the outside of the water heater 1 is connected above the blower 50, and the exhaust pipe 80 is connected to an exhaust pipe (not shown).

A burner 11 is disposed at the bottom of the combustion chamber 10. A gas supply pipe 70 that supplies fuel gas is connected to the burner 11. An ignition electrode 12 and a flame rod 13 are disposed above the burner 11, and a distribution plate (not shown) is disposed below the burner 11. When the blower 50 is operated, air in the exterior casing 200 is supplied to the burner 11 as combustion air through the distribution plate. Then, the ignition electrode 12 is operated to ignite the fuel gas, generating combustion exhaust. The combustion exhaust gas ejected from the burner 11 is supplied to the heat exchange chamber 20, passes through the exhaust chamber 30 and the blower 50, and is discharged to the outside of the water heater 1 from the exhaust pipe 80.

The heat exchange chamber 20 has a generally rectangular box-shaped housing that is open at the top and bottom. The bottom end of the heat exchange chamber 20 is connected to the top end of the combustion chamber 10, and the top end of the heat exchange chamber 20 is connected to the bottom end of the exhaust chamber 30. The heat exchange chamber 20 incorporates a heat exchanger 21 that recovers heat from the combustion exhaust gas generated by the burner 11 and heats water supplied from the water supply pipe 71. The heat exchanger 21 has a plurality of heat transfer fins 22 and a heat transfer tube 23 that is inserted into each heat transfer fin 22. The heat transfer tube 23 is extended in a serpentine or spiral shape within the heat exchange chamber 20, and one end of the heat transfer tube 23 is connected to the water supply pipe 71, and the other end of the heat transfer tube 23 is connected to the hot water outlet pipe 72. Note that other heat transfer media may be used instead of water.

The blower 50 has a fan casing 53 that houses the impeller 51, and an electric motor 52 that drives the impeller 51 to rotate. The fan casing 53 has an intake port 54 opening to the side. When the blower 50 is attached to the exhaust chamber 30, the intake port 54 communicates with the outlet port 33 that opens into the left side wall of the exhaust chamber 30. An exhaust port (not shown) opens upward at the upper end of the fan casing 53. When the exhaust tube 80 is connected to the top of the fan casing 53, the exhaust port communicates with the exhaust tube 80.

The casing body 2 is a rectangular box formed from sheet metal. The casing body 2 has a top surface 201 which is the exhaust pipe protruding surface, a rear surface 202 which extends downward from the rear end of the top surface 201, left and right side surfaces 203, 204 which extend downward from both the left and right ends of the top surface 201, and a bottom surface 205 which connects the bottom ends of the rear surface 202 and the left and right side surfaces 203, 204.

A U-shaped notch 220 that opens forward is formed in the left-right center of the top surface 201 of the casing body 2. When the combustion device body 100 is housed in the casing body 2, the exhaust tube 80 is inserted from the front into this notch 220, and the exhaust tube 80 protrudes upward from the top surface 201. At the inner peripheral edge of the front opening 210, except for the open portion 221 of the notch 220, upper, lower, left, and right inner peripheral flange portions 230 are formed by folding back the front ends of the top surface 201, left and right side surfaces 203, 204, and bottom surface 205 toward the inside of the front opening 210, almost all around.

As shown in FIG. 3, a first step portion 223 and a second step portion 224 are formed on the opposing left and right side edges of the notch portion 220 of the top surface 201, respectively, and are recessed downward from the front end portion of the top surface 201 to approximately the center of the notch portion 220 in the front-to-rear direction. In addition, a first slit hole 225 and a second slit hole 226 that are elongated in the front-to-rear direction and penetrate the first and second step portions 223 and 224 are formed in the middle portions in the front-to-rear direction of the first and second step portions 223 and 224, respectively.

Although not shown, the underside 205 of the casing body 2 has screw holes for screwing the lower edge portion 305 of the outer peripheral side plate 300 of the front cover 3 (described later) when the front opening 210 is closed by the front cover 3.

The inner flange portion 230, which is connected downward from the front end of the top surface 201, is divided into an upper left inner flange portion 231 (hereinafter referred to as the "first inner flange portion 231") located on the left side and an upper right inner flange portion 232 (hereinafter referred to as the "second inner flange portion 232") located on the right side, with the opening portion 221 of the notch portion 220 in between. A first screw hole 241 and a second screw hole 242 for fixing the installation member 400 described later are opened near the left and right side surfaces 203, 204 of the casing body 2 away from the opening portion 221 of the notch portion 220 in the first and second inner flange portions 231, 232. In addition, a first notch portion 243 and a second notch portion 244 that are shallowly notched upward are formed on the left-right inward side of the first and second screw holes 241, 242.

2 to 6, the installation member 400 is detachably attached to the front surface of the first and second inner flange portions 231, 232. The installation member 400 has a fixing piece 410 long in the left-right direction formed by forming a metal plate, a holding piece 440 long in the left-right direction extending diagonally upward and forward from a lower end slightly inward from both left-right ends of the fixing piece 410, and a cover portion 470 extending approximately horizontally from an upper end of the center of the left-right direction of the fixing piece 410 toward the rear. A first screw insertion hole 411 and a second screw insertion hole 412 are opened at positions corresponding to the first and second screw holes 241, 242 of the first and second inner flange portions 231, 232 at both left-right ends of the fixing piece 410, respectively. The length of the fixing piece 410 in the left-right direction is set to be approximately the same as the distance from the left end of the first inner flange portion 231 to the right end of the second inner flange portion 232. In addition, the height of the fixing piece 410 is set to be approximately the same as the height of the first and second inner flange portions 231, 232. Therefore, when the fixing piece 410 is fixed to the first and second inner flange portions 231, 232, the fixing piece 410 is attached to approximately the entire front surface of the first and second inner flange portions 231, 232 so as to straddle the opening portion 221 of the notch portion 220.

A first locking hole 413 and a second locking hole 414 are provided near both left and right ends of the connection between the fixed piece 410 and the retaining piece 440, and are provided on the left and right inner side of the first and second screw insertion holes 411, 412. A first bent piece 415 and a second bent piece 416 are provided on the left and right inner side of the first and second locking holes 413, 414, respectively, which are formed by cutting a part of the retaining piece 440 from the lower end of the fixed piece 410 toward the rear. Therefore, a first machining hole 441 and a second machining hole 442 are provided in the retaining piece 440 from the lower ends of the first and second bent pieces 415, 416 to the center of the retaining piece 440 in the vertical direction. The first and second bent pieces 415, 416 are formed so that when the fixed piece 410 is fixed to the first and second inner flange portions 231, 232, the upper surfaces of the first and second bent pieces 415, 416 substantially abut from below against the lower ends of the first and second inner flange portions 231, 232 near the front edge of the notch portion 220.

The cover portion 470 is formed so that when the cover portion 470 is inserted into the notch portion 220, a part of the periphery of the cover portion 470 fits inside the first and second step portions 223, 224. The rear end of the cover portion 470 is cut out in an approximately semicircular shape. In addition, a pair of first insertion pieces 471 and second insertion pieces 472 that are inserted into the first and second slit holes 225, 226 of the first and second step portions 223, 224 described above are formed on the left and right rear ends of the cover portion 470. In addition, the fixing piece 410 and the cover portion 470 are formed so that when the first and second insertion pieces 471, 472 are inserted into the first and second slit holes 225, 226, respectively, the rear surface of the fixing piece 410 approximately abuts against the front surface of the first and second inner flange portions 231, 232.

The front cover 3 is made of a shallow dish formed from sheet metal and is open to the rear. The front cover 3 has a roughly rectangular cover body 300 and an outer peripheral side plate 310 that extends rearward from the entire circumference of the cover body 300. The outer peripheral side plate 310 of the front cover 3 is fitted onto the outer periphery of the front end of the casing body 2, and the front opening 210 is closed by the front cover 3.

The upper edge portion 301 of the outer peripheral side plate 310 of the front cover 3 is cut out slightly inward toward the front from both left and right ends. A long mounting piece 330 extends downward in the left and right direction from the rear end of the cut-out portion of the upper edge portion 301. A pair of first and second locking pieces 331 and 332 are formed near both left and right ends of the mounting piece 330, respectively, which extend diagonally downward and rearward from the lower end of the mounting piece 330. When the front cover 3 is attached to the casing main body 2, the first and second locking pieces 331 and 332 are inserted from the front into the first and second locking holes 413 and 414 near both left and right ends of the installation member 400 described above. The front cover 3 is formed so that when the first and second locking pieces 331, 332 are inserted into the first and second locking holes 413, 414, the rear surface of the mounting piece 330 approximately abuts against the front surface of the fixed piece 410 of the installation member 400, and the first and second locking pieces 331, 332 are positioned below the first and second cutout portions 243, 244 of the first and second inner flange portions 231, 232.

Although not shown, lower screw insertion holes are provided near both left and right ends of the lower edge 305 of the outer peripheral side plate 310 of the front cover 3. These lower screw insertion holes are formed at positions corresponding to the screw holes in the lower surface 205 of the casing body 2 described above.

Next, a method of mounting the installation member 400 and the front cover 3 in the water heater 1 of this embodiment will be described. As shown in Figures 2 and 3, the combustion device main body 100 is accommodated in the casing main body 2 from the front opening 210, and with the exhaust pipe 80 protruding upward from the notch 220 in the top surface 201, the cover part 470 of the installation member 400 is inserted into the notch 220 from the front, and the first and second insertion pieces 471, 472 provided at the left and right rear ends of the cover part 470 are inserted into the first and second slit holes 225, 226 provided in the first and second step parts 223, 224. As a result, as shown in Figure 4, a part of the periphery of the cover part 470 is fitted into the first and second step parts 223, 224. In addition, the first and second insertion pieces 471, 472 abut against the inner surface of the top surface 201, and the installation member 400 is temporarily fixed to the top surface 201. In addition, the rear surface of the fixing piece 410 of the installation member 400 approximately abuts against the front surfaces of the first and second inner flange portions 231, 232.

Next, the fixing screws S1 and S2 are inserted from the front into the first and second screw insertion holes 411 and 412 provided near both left and right ends of the fixing piece 410, and the fixing screws S1 and S2 are screwed into the first and second screw holes 241 and 242 provided near both left and right ends of the first and second inner flange parts 231 and 232. As a result, the installation member 400 spanning the open part 221 of the notch 220 is fixed to the first and second inner flange parts 231 and 232. At this time, the first and second bent pieces 415 and 416 that bend and extend from the lower end of the fixing piece 410 described above toward the first and second inner flange parts 231 and 232 side approximately abut from below against the lower ends of the first and second inner flange parts 231 and 232 near the left and right front edges of the notch 220 (see FIG. 5).

With the installation member 400 fixed to the first and second inner flange portions 231, 232 as described above, the first and second locking pieces 331, 332 formed on the mounting piece 330 extending downward from the upper edge portion 301 of the outer peripheral side plate 310 of the front cover 3 are inserted from the diagonally upward front into the first and second locking holes 413, 414 of the installation member 400, respectively, and engaged with the first and second locking holes 413, 414. As a result, the first and second locking pieces 331, 332 extending rearward through the first and second locking holes 413, 414 are positioned below the first and second cutout portions 243, 244, respectively (see FIG. 5).

Next, the outer peripheral side plate 310 of the front cover 3 is fitted onto the outer periphery of the front end of the casing body 2. Then, although not shown, a fixing screw is inserted from below into the lower screw insertion hole opened in the lower edge portion 305 of the outer peripheral side plate 310 of the front cover 3, and the fixing screw is further screwed into the screw hole opened in the lower surface 205 of the casing body 2 to fix the front cover 3 to the casing body 2.

According to this embodiment, the installation member 400 is bridged across the first and second inner flanges 231, 232 that sandwich the open portion 221 of the notch 220, so that the top surface 201 near the front edge of the notch 220 is reinforced by the installation member 400, and strength against pressure from above can be improved. In addition, the fixing piece 410 of the installation member 400 is fixed to the front surface of the first and second inner flanges 231, 232 near the left and right side surfaces 203, 204 of the casing body 2 that are away from the open portion 221 of the notch 220, and these left and right side surfaces 203, 204 have high strength against pressure from above, so that even if the top surface 201 is pressed downward, the downward movement of the installation member 400 is suppressed, and strength against pressure from above can be further improved. In addition, the installation member 400 is placed in front of the opening 221 of the notch 220, and the mounting piece 330 of the front cover 3 is placed on the front surface of the fixing piece 410, so the strength against pressure from the front can be improved. This makes it possible to prevent deformation of the casing body 2.

In addition, according to this embodiment, the installation member 400 is fixed from the front to the first and second inner flange portions 231, 232, which have less deflection in the front-rear direction, compared to when the exhaust pipe cover is fixed from above to the top surface 201, which has a large deflection in the up-down direction, improving workability.

In addition, according to this embodiment, with the installation member 400 fixed to the front of the first and second inner flange portions 231, 232, the front opening 210 is covered with the front cover 3, so that the installation member 400 is interposed between the casing body 2 and the front cover 3 and is not exposed to the outside, improving the aesthetic appearance. In addition, a portion of the periphery of the cover portion 470 of the installation member 400 fits into the first and second step portions 223, 224 formed on the side edges of the notch portion 220, so that the top surface 201 and the outer surface of the cover portion 470 form a substantially flush surface. This improves the aesthetic appearance.

In addition, according to this embodiment, when the front cover 3 closes the front opening 210 of the casing body 2, the first and second locking pieces 331, 332 extending rearward from the mounting piece 330 formed at the upper end of the front cover 3 are engaged with the first and second locking holes 413, 414 of the installation member 400 fixed to the first and second inner flange portions 231, 232. Therefore, even if pressure is applied to the top surface 201 from above, the fixed piece 410 of the installation member 400 is supported from below by the first and second locking pieces 331, 332 of the front cover 3. In addition, since the fixed piece 410 is supported by the front cover 3, the first and second inner flange portions 231, 232 to which the fixed piece 410 is fixed are also supported from below by the first and second locking pieces 331, 332 of the front cover 3. This further improves the strength against pressure from above. In addition, when the front cover 3 is engaged with the installation member 400, the holding piece 440 of the installation member 400 is positioned forward of the mounting piece 330 of the front cover 3, so the strength against pressure from the front can be further improved. This further prevents deformation of the casing body 2.

In addition, according to this embodiment, the installation member 400 has a fixed piece 410, a holding piece 440 that extends diagonally upward and forward from the lower end of the fixed piece 410, and first and second bent pieces 415, 416 that are bent backward from the connection between the fixed piece 410 and the holding piece 440, so that it has high strength. The first and second bent pieces 415, 416 of the installation member 400 support the lower ends of the first and second inner flange parts 231, 232 near the front end edge of the notch part 220 from below, so that even if pressure is applied to the top surface 201 from above, the downward movement of the first and second inner flange parts 231, 232 is suppressed by the first and second bent pieces 415, 416. This further improves the strength against pressure from above, and prevents deformation of the casing body 2.

In addition, according to this embodiment, the top surface 201 of the casing body 2 has first and second step portions 223, 224 formed on the side edges of the notch portion 220 that are recessed downward, thereby improving the strength of the top surface 201. In addition, according to this embodiment, when the fixing piece 410 of the installation member 400 is fixed to the front surface of the first and second inner flange portions 231, 232, the first and second insertion pieces 471, 472 at the rear end of the cover portion 470 abut against the inner surface of the top surface 201. This further prevents deformation of the casing body 2.

As described above, this embodiment can provide a combustion device that has high strength against external pressure, and is easy to use and has a good appearance.

(Other embodiments)
(1) In the above embodiment, the installation member is fixed to the front surface of the first and second inner flange portions. However, in the present invention, the fixing piece of the installation member may be fixed to the rear surface of the first and second inner flange portions. In this case, the cover portion extending rearward from the fixing piece is disposed below the notch, and the lower ends of the first and second inner flange portions are supported from below by the connecting portion between the fixing piece and the holding piece.

(2) In the above embodiment, the front cover is provided with a locking piece, and the installation member is provided with a locking hole. However, in the present invention, the engagement structure is not particularly limited as long as the front cover and the installation member can be engaged with each other. For example, the front cover may have a locking hole, and the installation member may have a locking piece.

REFERENCE SIGNS LIST 1 water heater 2 casing body 3 front cover 100 combustion device body 201 top surface 210 front opening 220 notch portion 221 open portion 231 first inner peripheral flange portion 232 second inner peripheral flange portion 400 installation member 410 fixing piece 415 first bent piece 416 second bent piece 440 holding piece 470 cover portion

Claims (5)

A combustion device body;
a casing body having a front opening that opens forward and that houses the combustion device body;
A front cover that covers the front opening from the front;
an exhaust pipe for discharging combustion exhaust gas from the combustion device body to the outside,
A combustion apparatus in which a slit opening forward is formed on an exhaust pipe protruding surface of the casing body, and the exhaust pipe is inserted into the slit,
a first inner peripheral flange portion and a second inner peripheral flange portion are formed on an inner peripheral edge of the front opening on the exhaust pipe protruding surface side of the casing body, the first inner peripheral flange portion and the second inner peripheral flange portion extending from a front end portion of the exhaust pipe protruding surface toward an inward side of the front opening, with an opening portion of the notch portion sandwiched therebetween;
A combustion device, wherein a bridging member is fixed to the first and second inner peripheral flange portions so as to straddle the open portion of the notch portion. 2. The combustion apparatus according to claim 1,
The combustion device, wherein the installation member is fixed to the first and second inner circumferential flange portions near a side surface of the casing body away from the opening of the notch. The combustion apparatus according to claim 1 or 2,
The installation member and the front cover are formed so as to engage with each other when the front opening is covered with the front cover. The combustion apparatus according to any one of claims 1 to 3,
the installation member has a fixed piece fixed to a front surface of the first and second inner circumferential flange portions, and a bent piece bent from an end of the fixed piece on the inner side of the front opening toward the first and second inner circumferential flange portions,
The bent piece is configured to support the first and second inner circumferential flange portions when the exhaust pipe protruding surface is pressed from the outside. The combustion apparatus according to claim 4,
the exhaust pipe protruding surface has a first step portion and a second step portion recessed toward an inner side of the casing body on opposing side edges of the cutout portion,
the installation member has a cover portion extending rearward from a rear surface of the fixing piece so as to cover a gap between the exhaust pipe and the opening of the notch,
The first and second step portions and the cover portion are formed such that a portion of a periphery of the cover portion fits into the first and second step portions.

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