JP2021055929A - Combustion device for water heater and water heater - Google Patents

Abstract

To provide a configuration to accurately, efficiently and easily attach a partition section in a body constituting a combustion device.SOLUTION: A combustion device includes: a burner group; a body 330 which stores the burner group; and a partition section 350 which partitions an inside of the body 330. An insertion section which is configured to project to a front side and extend along a right and left direction is provided in a front surface section on an inner side of the body 330 on a back plate 344 of the body 330. The partition section 350 is configured to have a planar shape including a first plate surface section 351 facing a first burner group side, a second plate surface section facing a second burner group side, a rear end 353 opposed to the front surface section of the back plate 344, and a front end 355 opposed to a lid section. A slit which extends along a vertical direction and is recessed to a front side is formed in a part at a rear end 353 of the partition section 350. The partition section 350 is fixed to the back plate 344 in a configuration in which the insertion section is inserted into the slit.SELECTED DRAWING: Figure 7

Description

The present disclosure relates to a water heater.

Conventionally, there is known a combustion device for a water heater in which a partition wall is provided in a common housing and a group of burners for hot water supply and a group of burners for circulation heating are arranged on the left and right sides of the partition wall. An example of this type of combustion device is the one disclosed in Patent Document 1.

Japanese Unexamined Patent Publication No. 2014-169847

It is desirable that this type of combustion device has a configuration in which the partition wall can be fixed to the housing at an accurate position with good workability during manufacturing or maintenance. However, in the conventional combustion device as disclosed in Patent Document 1, there is no means for temporarily fixing the partition wall when it is attached, and the position shift is likely to occur during the fixing work (for example, screwing), and the work efficiency is improved. There is a problem that it is bad.

Therefore, in order to solve at least one of the above-mentioned problems, a configuration is provided in which the partition portion can be easily and accurately and efficiently mounted in the housing constituting the combustion device.

The combustion device for a water heater according to one aspect of the present disclosure is
A group of burners with multiple burners and
A housing for accommodating the burner group and
A partition that partitions the inside of the housing and
With
The burner group includes a first burner group including a plurality of first burners and a second burner group including a plurality of second burners, and the first burner group is the second burner group in the housing. Located on one side of the burner group in the left-right direction,
The housing has a back plate arranged on the rear side of the burner group, a pair of side plates arranged on both left and right sides of the burner group, and a lid portion arranged on the front side of the burner group. And
The front portion of the back plate on the inner side of the housing is provided with an insertion portion that projects forward and extends in the left-right direction.
The partition portion includes a first plate surface portion facing the first burner group side, a second plate surface portion facing the second burner group side, a rear end portion facing the front surface portion of the back plate, and the above. It has a plate-like structure with a front end facing the lid.
The rear end of the partition is partially formed with a slit recessed on the front side.
The partition portion is fixed to the back plate in a configuration in which the insertion portion is inserted into the slit.

The water heater of one aspect of the present disclosure is
A combustion device for the above water heater is provided.

According to the configuration of the present disclosure, it becomes easy to install the partition portion accurately and efficiently in the housing constituting the combustion device.

FIG. 1 is a front view schematically illustrating the internal structure of the water heater according to the first embodiment. FIG. 2 is an explanatory diagram that conceptually illustrates the configuration of the water heater. FIG. 3 is a partially enlarged cross-sectional view taken along the line AA (cutting position AA) of FIG. FIG. 4 is a partially enlarged cross-sectional view taken along the line BB (cutting position BB) of FIG. FIG. 5 is a perspective view showing a state in which the front lid portion of the combustion device according to the first embodiment is removed. FIG. 6 is a perspective view showing a state in which the frame portion (cover portion) is removed from the state of FIG. FIG. 7 is a perspective view showing a state in which the burner group is removed from the state of FIG. FIG. 8 is a perspective view showing a state in which the partition portion is removed from the state of FIG. 7. FIG. 9 is a perspective view showing a state in which the partition portion is disassembled from the state of FIG. FIG. 10 is a perspective view showing a state in which the partition portion is disassembled from the state of FIG. 8 from a direction different from that of FIG. FIG. 11 is a perspective view illustrating a partition portion used in the combustion device according to the first embodiment. FIG. 12 is a plan view of the state of FIG. 7. FIG. 13 is a plan view of the state of FIG. FIG. 14 is a front view of the state of FIG. 7. FIG. 15 is a front view of the state of FIG. FIG. 16 is a cross-sectional view showing a CC cross section of FIG. FIG. 17 is a cross-sectional view showing a DD cross section of FIG. FIG. 18 is a cross-sectional view showing an EE cross section of FIG.

Hereinafter, embodiments of the present disclosure will be listed and illustrated.

In the combustion device of the present disclosure, when the partition portion is attached to the inside of the housing constituting the combustion device, the insertion portion provided on the front surface portion of the back plate is inserted into the slit formed at the rear end portion of the partition portion. It can be temporarily fixed as follows. With such a configuration, when installing the partition portion in the housing, it becomes easier for the operator to perform the work of aligning and holding the partition portion in the vicinity of an accurate position. Then, in the state of being stably temporarily fixed in this way, the fixing work can be performed so as to fix the partition portion to the back plate, so that the partition portion can be easily attached to an accurate position in the housing.

In the combustion apparatus of the present disclosure, the partition portion is a plate-shaped partition wall in which one plate surface is arranged so as to face the first burner group side and the other plate surface is arranged so as to face the second burner group side. And a plate-shaped bent piece that is bent from the partition wall and is arranged so as to face the front surface portion of the back plate. Then, in the combustion device, the bent piece and the back plate may be fixed so that the screw member is inserted from the front side into the overlapping portion where the bent piece and the back plate overlap.

Since this combustion device can be temporarily fixed so that the plate-shaped bent piece and the back plate are overlapped with each other, the stability of the temporary fixing can be further improved. Further, since the screw member can be fixed (mainly fixed) by inserting the screw member from the front side to the overlapping portion overlapped by the temporary fixing, the workability at the time of the main fixing is further improved.

In the combustion apparatus of the present disclosure, slits may be formed in a bent piece so as to extend in the left-right direction. The bent piece may include a first bent piece arranged on the upper side of the slit and a second bent piece arranged on the lower side of the slit.

Since this combustion device can be temporarily fixed so as to insert the insertion portion into the slit formed so as to extend in the left-right direction, wobbling at the time of temporary fixing can be reduced. Therefore, this combustion device can further improve the stability at the time of temporary fixing.

In the combustion apparatus of the present disclosure, the partition portion includes a first plate portion and a second plate portion, and even if the first plate portion and the second plate portion are integrally connected to each other. Good. A first slit forming one of the slits may be formed at the rear end portion of the first plate portion. A second slit forming one of the slits may be formed at the rear end portion of the second plate portion. The first slit and the second slit may be provided at intervals in the left-right direction.

Since this combustion device can be temporarily fixed so that the insertion portion is inserted into a plurality of slits formed at positions separated from each other in the partition portion, the combustion device is temporarily fixed as compared with the configuration in which the insertion portion is inserted only at one position. Wobble etc. are further suppressed. Therefore, this combustion device can further improve the stability at the time of temporary fixing.

<First Embodiment>
Hereinafter, the first embodiment will be described with reference to the drawings.
1. 1. Outline of the water heater As shown in FIGS. 1 to 4, the water heater 1 includes a primary heat exchange device 100, a secondary heat exchange device 200, a combustion device 300, and an exhaust hood 400.

As shown in FIGS. 2 and 4, the primary heat exchanger 100 includes two heat exchangers, a primary heat exchanger 110 for hot water supply and a primary heat exchanger 120 for bath.

As shown in FIG. 4, the secondary heat exchange device 200 is arranged above the primary heat exchange device 100. The secondary heat exchanger 200 includes a hot water supply secondary heat exchanger 210 connected to the upstream side of the hot water supply primary heat exchanger 110 and a bath secondary heat exchanger 220 connected to the upstream side of the bath primary heat exchanger 120. It is equipped with two heat exchangers.

As shown in FIG. 4, the combustion device 300 is connected below the primary heat exchange device 100. As shown in FIG. 5, the combustion device 300 includes a burner group 308 and a housing 330 for accommodating the burner group 308 and the like. The burner group 308 includes a hot water supply burner group 310 that generates combustion exhaust to be sent to the hot water supply primary heat exchanger 110 and the hot water supply secondary heat exchanger 210, a bath primary heat exchanger 120, and a bath secondary heat exchanger. It is provided with two burner groups, a bath burner group 320 for generating combustion exhaust to be sent to 220.

As shown in FIG. 3, the lower end of the exhaust hood 400 is connected to the primary heat exchange device 100, and the upper end is connected to the secondary heat exchange device 200. The lower end of the exhaust hood 400 opens downward and communicates with the space inside the primary heat exchange device 100. Further, the exhaust hood 400 has an upper end portion that opens toward the front and communicates with the space inside the secondary heat exchange device 200.

In the combustion apparatus 300 shown in FIGS. 5 and 6, the hot water supply burner group 310 corresponds to an example of the first burner group. In FIG. 6, the plurality of burners 310A constituting the hot water supply burner group 310 correspond to an example of the first burner. The bath burner group 320 corresponds to an example of the second burner group. The plurality of burners 320A constituting the bath burner group 320 correspond to an example of the second burner.

The water heater 1 distributes the combustion exhaust generated by the burner groups 310 and 320 of the combustion device 300 to the primary heat exchange device 100 above the combustion device 300. Further, in the water heater 1, the combustion exhaust of the combustion device 300 is guided from the primary heat exchange device 100 to the secondary heat exchange device 200 via the exhaust hood 400.

The primary heat exchanger 100 exchanges heat between the water flow in the hot water supply primary heat exchanger 110 and the bath primary heat exchanger 120 and the combustion exhaust. The primary heat exchange device 100 recovers the sensible heat of the combustion exhaust. The combustion exhaust gas that has passed through the primary heat exchange device 100 enters the secondary heat exchange device 200 from behind via the exhaust hood 400.

The secondary heat exchanger 200 exchanges heat between the water flow of the secondary heat exchanger 210 for hot water supply and the secondary heat exchanger 220 for bath and the combustion exhaust. The secondary heat exchanger 200 recovers the latent heat of the combustion exhaust.

As shown in FIG. 2, the water heater 1 is configured to include two circuits, a hot water supply circuit 10 and a bath circuit 20, in terms of circuit configuration.

The hot water supply circuit 10 is a circuit that heats water from a tap or the like and causes it to flow out as hot water. In the hot water supply circuit 10, water flows into the water inlet pipe 12 from the water inlet 11 connected to a water supply source such as a water heater, and the secondary heat exchanger 210 for hot water supply (specifically, the secondary heat exchanger 210 for hot water supply). Water is exchanged with the combustion exhaust of the hot water supply burner group 310 while passing water in the order of the heat transfer tube 211) and the hot water supply primary heat exchanger 110 (specifically, the heat transfer tube 111 of the hot water supply primary heat exchanger 110). Is heated, the hot water pipe 13 is circulated, and hot water flows out from the hot water outlet 14. The pipeline 15 is a pipe between the hot water supply secondary heat exchanger 210 and the hot water supply secondary heat exchanger 210.

The bath circuit 20 is a circuit that circulates and heats the hot water in the bathtub B. In the bath circuit 20, the hot water in the bath B is sucked into the return pipe 22 by the circulation pump P from the hot water inlet 21 communicating with the opening in the bath B, and the secondary heat exchanger 220 for the bath (specifically, the second for the bath). The combustion exhaust of the bath burner group 320 while passing water in the order of the heat transfer tube 221) of the secondary heat exchanger 220) and the primary heat exchanger 120 for bath (specifically, the heat transfer tube 121 of the primary heat exchanger 120 for bath). The hot water is reheated by exchanging heat with the hot water, and the hot water having a higher temperature is discharged from the hot water outlet 24 to the bath B via the outgoing pipe 23. The pipeline 40 is a pipe between the secondary heat exchanger 220 for bath and the primary heat exchanger 120 for bath.

As shown in FIGS. 1 and 2, the water heater 1 includes a drain hose 31 and a neutralizer 32. The upstream side of the drain hose 31 is connected to a drain discharge port provided in the secondary heat exchange device 200, and the downstream side is connected to the neutralizer 32.

As shown in FIG. 1, the water heater 1 includes a controller 33 as a control device. The controller 33 is configured to have, for example, a known microcomputer, and is configured to be able to acquire signals from various sensors provided in the water heater 1, and various actuators provided in the water heater 1 are used. It has a controllable configuration. For example, the water heater 1 can operate the hot water supply burner group 310 to generate hot water when the water flow sensor (not shown in FIG. 1) detects the water flow in the water inlet pipe 12. As another example, when the water heater 1 detects the water flow in the return pipe 22 by the water flow sensor (not shown in FIG. 1), the water heater group 320 operates the bath burner group 320 to re-cook the bath. obtain.

The primary heat exchange device 100 is a sensible heat recovery type heat exchange device. As shown in FIG. 4 and the like, the primary heat exchanger 100 includes a can body 130, a primary heat exchanger 110 for hot water supply, and a primary heat exchanger 120 for a bath. As the can body 130, the primary heat exchanger 110 for hot water supply, and the primary heat exchanger 120 for bath, for example, copper having excellent thermal conductivity can be adopted.

The can body 130 has a substantially rectangular shape in a plan view that is long in the left-right direction, and is formed in a tubular shape that penetrates vertically. The inside of the can body 130 is partitioned to the left and right by a partition portion 131. The primary heat exchanger 110 for hot water supply and the primary heat exchanger 120 for bath are arranged side by side in the can body 130 in the left-right direction via the partition portion 131. In other words, the primary heat exchanger 110 for hot water supply is housed in the space on the right side partitioned by the partition 131 in the can body 130, and the primary heat exchanger 120 for bath is the partition 131 in the can body 130. It is stored in the space on the left side partitioned by.

The secondary heat exchange device 200 is a latent heat recovery type heat exchange device. As shown in FIG. 4 and the like, the secondary heat exchange device 200 is arranged above the primary heat exchange device 100. The secondary heat exchange device 200 and the primary heat exchange device 100 are connected by an exhaust hood 400. The secondary heat exchanger 200 includes a housing 230, a secondary heat exchanger 210 for hot water supply, and a secondary heat exchanger 220 for a bath. The secondary heat exchanger 210 for hot water supply is housed in the space on the right side partitioned by the partition portion 231 in the housing 230, and the secondary heat exchanger 220 for bath is partitioned by the partition portion 231 in the housing 230. It is stored in the space on the left side.

As shown in FIG. 3, the exhaust hood 400 is arranged between the primary heat exchange device 100 and the secondary heat exchange device 200. The exhaust hood 400 is a hood for introducing the combustion exhaust gas that has passed through the primary heat exchange device 100 into the secondary heat exchange device 200, and forms a gas flow path. The exhaust hood 400 communicates with the upper end opening of the can body 130 of the primary heat exchange device 100 and the inflow port 232 of the rear wall of the housing 230 of the secondary heat exchange device 200 to form a passage for combustion exhaust. .. The inside of the exhaust hood 400 is partitioned to the left and right by a partition portion 401. The partition portion 401 corresponds to each of the hot water supply circuit 10 and the bath circuit 20 in a form of connecting the upper end of the partition portion 131 of the primary heat exchange device 100 and the rear end of the partition portion 231 of the secondary heat exchange device 200. It forms a space.

2. Details of Combustion Device The combustion device 300 shown in FIGS. 2 and 5 burns combustion gas to generate combustion exhaust. As shown in FIG. 5, the combustion device 300 includes a housing 330, a hot water supply burner group 310 (first burner group), a bath burner group 320 (second burner group), and a partition portion 350.

The housing 330 is provided below the can body 130 of the primary heat exchange device 100. The hot water supply burner group 310 (first burner group) is arranged in the housing 330 on one side in the left-right direction (right side when the combustion device 300 is viewed from the front) with respect to the bath burner group 320 (second burner group). ing.

As shown in FIG. 5, the housing 330 has a substantially rectangular shape in a plan view that is long in the left-right direction, and the housing 330 is provided with an opening at the upper end. The housing 330 has a square tubular shape similar to that of the can body 130. The inside of the housing 330 is partitioned to the left and right by a partition portion 350. The housing 330 includes a back plate 344 arranged on the rear side of the burner group 308, a pair of side plates 341 and 342 arranged on the left and right sides of the burner group 308, and a lid portion arranged on the front side of the burner group 308. It has 346 and. Further, the pair of side plates 341 and 342 extend forward from the left and right ends of the back plate 344, and the lid portion 346 is fixed to the front ends of the pair of side plates 341 and 342. In this way, the back plate 344, the pair of side plates 341, 342, and the lid portion 346 are formed in a frame shape and surround the burner group 308 on all sides. In FIG. 5, the lid portion 346 is conceptually shown by a chain double-dashed line. A bottom plate 347 is fixed to the back plate 344, a pair of side plates 341, 342, and the lower end side of the lid portion 346, and the housing 330 has a box-like shape as a whole. The upper end portion of the housing 330 is connected and fixed to the lower end portion of the can body 130 of the primary heat exchange device 100 by caulking, and the internal space of the housing 330 and the internal space of the can body 130 communicate with each other. As shown in FIG. 5, a frame portion 349 (cover portion) that covers the burner group 308 from the front side and is fixed to the front end portion of the partition portion 350 is fixed at a position near the front end in the housing 330.

The hot water supply burner group 310 and the bath burner group 320 are arranged side by side in the housing 330 in the left-right direction via the partition portion 350. Specifically, the inside of the housing 330 is partitioned by the partition portion 350, so that the space on one side in the left-right direction (the space on one side in the left-right direction with respect to the partition portion 350) and the space on the other side in the left-right direction (the space on the other side in the left-right direction) in the housing 330. The space on the other side in the left-right direction from the partition portion 350) is configured. The hot water supply burner group 310 is arranged in the space on one side in the left-right direction in the housing 330, and the bath burner group 320 is arranged in the space on the other side in the left-right direction in the housing 330. More specifically, the hot water supply burner group 310 is housed in the space on the right side partitioned by the partition portion 350 in the housing 330, and the bath burner group 320 is partitioned by the partition portion 350 in the housing 330. It is stored in the space on the left side. The plurality of burners 310A constituting the hot water supply burner group 310 are arranged side by side in the left-right direction in the space on one side in the left-right direction in the housing 330. The plurality of burners 320A constituting the bath burner group 320 are arranged side by side in the left-right direction in the space on the other side in the left-right direction in the housing 330. With such a configuration, the hot water supply burner group 310 is arranged below the hot water supply primary heat exchanger 110 to supply combustion exhaust to the hot water supply circuit 10. The bath burner group 320 is arranged below the bath primary heat exchanger 120 to supply combustion exhaust to the bath circuit 20.

As shown in FIGS. 1 and 2, the spark plug 311 and the frame rod 312 are arranged in the space above the hot water supply burner group 310. Similarly, a spark plug 321 and a frame rod 322 are arranged above the bath burner group 320. These spark plugs 311, 321 and frame rods 312 and 322 are inserted into the housing 330 from the front surface of the housing 330.

As shown in FIGS. 5 to 7, the partition portion 350 is a plate-shaped portion that partitions the inside of the housing 330. As shown in FIGS. 7 to 10, the partition portion 350 has a configuration in which the first plate portion 360, the second plate portion 370, and the third plate portion 380 are overlapped in the left-right direction, and as shown in FIG. , It has a plate-like shape as a whole, and is arranged in the housing 330 in a configuration in which the left-right direction is the thickness direction. The first plate portion 360, the second plate portion 370, and the third plate portion 380 are all made of a metal plate, and are partially processed such as unevenness and bending. The partition portion 350 includes a first plate surface portion 351 facing the hot water supply burner group 310 (first burner group) side, a second plate surface portion 352 facing the bath burner group 320 (second burner group) side, and a back. It has a plate-like structure including a rear end portion 353 facing the front surface portion of the face plate 344 and a front end portion 355 facing the lid portion 346.

As shown in FIGS. 6, 11, and 12, the first plate surface portion 351 is a portion of the first plate portion 360 that constitutes a surface on the hot water supply burner group 310 (first burner group) side. The second plate surface portion 352 is a portion of the second plate portion 370 that constitutes a surface on the bath burner group 320 (second burner group) side. The rear end portion 353 is a portion constituting the rear end of the partition portion 350 formed in a plate shape, and is a portion facing the front portion of the back plate 344. Specifically, the rear end portion 353 is composed of the rear end portions of the first plate portion 360, the second plate portion 370, and the third plate portion 380. The front end portion 355 is a portion constituting the front end of the partition portion 350 formed in a plate shape, and specifically, the front end portion is provided by the front end portions of the first plate portion 360, the second plate portion 370, and the third plate portion 380. The portion 355 is configured and is arranged so as to face the lid portion 346.

The first plate portion 360 includes a plate-shaped first wall portion 362 and a bent piece 364 that bends from the first wall portion 362. The second plate portion 370 includes a plate-shaped second wall portion 372 and a bent piece 374 that bends from the second wall portion 372. The third plate portion 380 includes a third wall portion 382 interposed between the first wall portion 362 and the second wall portion 372. The first wall portion 362, the second wall portion 372, and the third wall portion 382 correspond to an example of the partition wall, and one plate surface is arranged so as to face the first burner group side, and the other plate surface is It has a plate-like shape that is arranged so as to face the second burner group side.

As shown in FIGS. 14 and 16 to 18, the bent piece 364 and the bent piece 374 form a plate-like structure (plate piece structure) that is bent from the partition wall and is arranged so as to face the front surface portion of the back plate 344. .. In the combustion device 300, the bent pieces 364, 374 and the back plate 344 are fixed by inserting the screw member 358 from the front side into the overlapping portion 356 in which the bent pieces 364 and 374 and the back plate 344 overlap. ..

The front portion of the back plate 344 on the inner side of the housing 330 is provided with an insertion portion 348 that projects forward and extends in the left-right direction. The insertion portion 348 has a plate-like shape (plate piece form) protruding forward, has a thickness direction in the vertical direction, and is provided in a form extending linearly along the left-right direction.

The rear end portion 353 of the partition portion 350 is partially formed with a slit 354 extending in the left-right direction and recessed in the front side. At the rear end of the first plate portion 360, a first slit 366 forming one of the slits 354 is formed. At the rear end of the second plate portion 370, a second slit 376 forming one of the slits 354 is formed. At the rear end of the third plate portion 380, a third slit 386 forming one of the slits 354 is formed.

Specifically, the first slit 366 is formed in the bent piece 364 so as to extend in the left-right direction. Further, the second slit 376 is formed in the bent piece 374 so as to extend in the left-right direction. The bent piece 364 is a first bent piece 364A arranged above the slit 354 (specifically, the first slit 366) and a second arranged below the slit 354 (specifically, the first slit 366). It is provided with two bent pieces 364B. Further, the bent piece 374 is arranged below the first bent piece 374A arranged above the slit 354 (specifically, the second slit 376) and below the slit 354 (specifically, the second slit 376). The second bent piece 374B and the like are provided. Further, a third slit 386 forming one of the slits 354 is formed at the rear end portion of the third plate portion 380.

In such a configuration, as shown in FIGS. 16 to 18, the partition portion 350 is fixed to the back plate 344 in a configuration in which the insertion portion 348 is inserted into the slit 354. Specifically, the insertion portion 348 is positioned and fixed so as to be inserted into any of the first slit 366, the second slit 376, and the third slit 386.

3. 3. Examples of action and effect Next, the action and effect of the water heater 1 and the combustion device 300 described above will be illustrated.
The combustion device 300 includes a burner group 308 having a plurality of burners, a housing 330 for accommodating the burner group 308, and a partition portion 350 for partitioning the inside of the housing 330. The burner group 308 includes a first burner group having a plurality of first burners and a second burner group having a plurality of second burners. The first burner group is arranged in the housing 330 on one side in the left-right direction with respect to the second burner group. The housing 330 includes a back plate 344 arranged on the rear side of the burner group 308, a pair of side plates 341 and 342 arranged on the left and right sides of the burner group 308, and a lid portion arranged on the front side of the burner group 308. It has 346 and. The front portion of the back plate 344 on the inner side of the housing is provided with an insertion portion 348 extending in the left-right direction while having a configuration of projecting to the front side. The partition portion 350 includes a first plate surface portion 351 facing the first burner group side, a second plate surface portion 352 facing the second burner group side, and a rear end portion 353 facing the front surface portion of the back plate 344. It has a plate-like structure including a front end portion 355 facing the lid portion 346. The rear end portion of the partition portion 350 is partially formed with a slit 354 recessed on the front side, and the partition portion 350 is fixed to the back plate 344 in a configuration in which the insertion portion 348 is inserted into the slit 354. ..

When the partition portion 350 is attached to the inside of the housing 330 constituting the combustion device 300, the combustion device 300 configured in this way inserts the insertion portion 348 provided in the front portion of the back plate 344 after the partition portion 350. It can be temporarily fixed so as to be inserted into the slit 354 formed in the end portion 353. With such a configuration, when the partition portion 350 is installed in the housing 330 (during maintenance, manufacturing, etc.), the operator keeps the partition portion 350 aligned and held near an accurate position. It makes the work easier and easier. Then, in the state of being stably temporarily fixed in this way, the fixing work can be performed so as to fix the partition portion 350 to the back plate 344, so that the partition portion 350 can be easily attached to an accurate position in the housing 330. Become.

In the combustion device 300, the partition portion 350 is a plate-shaped first wall in which one plate surface is arranged so as to face the first burner group side and the other plate surface is arranged so as to face the second burner group side. It has a portion 362 (partition wall) and a second wall portion 372 (partition wall), and a plate-shaped bent piece 364, 374 that is bent from the partition wall and is arranged so as to face the front surface portion of the back plate 344. Then, in the combustion device 300, the bent piece 364 and the back plate 344 are fixed so that the screw member 358 is inserted from the front side into the overlapping portion 356 in which the bent piece 364 and the back plate 344 overlap. Since the combustion device 300 can be temporarily fixed so that the plate-shaped bent piece 364 and the back plate 344 are overlapped with each other, the stability of the temporary fixing can be further improved. Further, since the screw member 358 can be fixed (mainly fixed) so as to be inserted from the front side to the overlapping portion 356 overlapped by the temporary fixing, the workability at the time of the main fixing is further improved.

In the combustion device 300, slits (first slit 366, second slit 376) are formed in the bent pieces 364 and 374 so as to extend in the left-right direction. The bent pieces 364 are the first bent piece 364A arranged on the upper side of the slit 354 (upper side of the first slit 366) and the second bent piece 364 arranged on the lower side of the slit 354 (lower side of the first slit 366). 364B and. The bent pieces 374 are the first bent piece 367A arranged on the upper side of the slit 354 (upper side of the second slit 376) and the second bent piece 367A arranged on the lower side of the slit 354 (lower side of the second slit 376). 374B and. Since the combustion device 300 can be temporarily fixed so that the insertion portion 348 is inserted into the slits (specifically, the first slit 366 and the second slit 376) formed so as to extend in the left-right direction, the combustion device 300 is temporarily fixed. It is possible to reduce the wobbling at the time of. Therefore, the combustion device 300 can further improve the stability at the time of temporary fixing.

In the combustion device 300, the partition portion 350 includes a first plate portion 360 and a second plate portion 370, and the first plate portion 360 and the second plate portion 370 are integrally connected to each other. A first slit 366 forming one of the slits 354 is formed at the rear end portion of the first plate portion 360, and a second slit 376 forming one of the slits 354 is formed at the rear end portion of the second plate portion 370. Is formed. Since the combustion device 300 can be temporarily fixed so as to insert the insertion portion 348 extending in the left-right direction into a plurality of slits formed apart from each other in the left-right direction in the partition portion 350, the combustion device 300 is inserted only at one position. Compared with, wobbling at the time of temporary fixing is further suppressed. Therefore, the combustion device 300 can further improve the stability at the time of temporary fixing.

<Other Embodiments>
The present invention is not limited to the embodiments described above and in the drawings. For example, the features of the embodiments described above or below can be combined in any combination within a consistent range. Further, any of the features of the above-mentioned or later-described embodiments may be omitted unless it is clearly stated as essential. Further, the above-described embodiment may be modified as follows.

In the above-described embodiment, the partition portion 350 is configured to include three partition plates, but the number of partition plates may be two or less, or four or more.

It should be noted that the embodiments disclosed this time are exemplary in all respects and are not considered to be restrictive. The scope of the present invention is not limited to the embodiments disclosed here, but includes all modifications within the scope indicated by the claims or within the scope equivalent to the claims. Is intended.

1 ... Water heater 300 ... Combustion device 308 ... Burner group 310 ... Hot water supply burner group (1st burner group)
310A ... Burner (1st burner)
320 ... Bath burner group (second burner group)
320A ... Burner (2nd burner)
330 ... Housing 341, 342 ... Side plate 344 ... Back plate 346 ... Lid 348 ... Insertion 350 ... Partition 351 ... First plate surface 352 ... Second plate surface 353 ... Rear end 354 ... Slit 355 ... Front end 356 ... Overlapping part 358 ... Screw member 360 ... First plate part 362 ... First wall part (partition wall)
364 ... Bent piece 364A ... 1st bent piece 364B ... 2nd bent piece 366 ... 1st slit 370 ... 2nd plate part 372 ... 2nd wall part (partition wall)
374 ... Bent piece 374A ... 1st bent piece 374B ... 2nd bent piece 376 ... 2nd slit 382 ... 3rd wall part (partition wall)

Claims (5)

A group of burners with multiple burners and
A housing for accommodating the burner group and
A partition that partitions the inside of the housing and
With
The burner group includes a first burner group including a plurality of first burners and a second burner group including a plurality of second burners, and the first burner group is the second burner group in the housing. Located on one side of the burner group in the left-right direction,
The housing has a back plate arranged on the rear side of the burner group, a pair of side plates arranged on both left and right sides of the burner group, and a lid portion arranged on the front side of the burner group. And
The front portion of the back plate on the inner side of the housing is provided with an insertion portion that projects forward and extends in the left-right direction.
The partition portion includes a first plate surface portion facing the first burner group side, a second plate surface portion facing the second burner group side, a rear end portion facing the front surface portion of the back plate, and the above. It has a plate-like structure with a front end facing the lid.
The rear end of the partition is partially formed with a slit recessed on the front side.
The partition portion is a combustion device for a water heater in which the insertion portion is inserted into the slit and is fixed to the back plate. The partition is
A plate-shaped partition wall in which one plate surface is arranged so as to face the first burner group side and the other plate surface faces the second burner group side.
A plate-shaped bent piece that is bent from the partition wall and is arranged so as to face the front surface portion of the back plate.
Have,
The combustion device for a water heater according to claim 1, wherein the bent piece and the back plate are fixed by inserting a screw member from the front side into an overlapping portion where the bent piece and the back plate overlap. The slit is formed in the bent piece so as to extend in the left-right direction.
The combustion device for a water heater according to claim 2, wherein the bent piece includes a first bent piece arranged on the upper side of the slit and a second bent piece arranged on the lower side of the slit. The partition portion includes a first plate portion and a second plate portion, and has a configuration in which the first plate portion and the second plate portion are integrally connected.
A first slit forming one of the slits is formed at the rear end portion of the first plate portion.
A second slit forming one of the slits is formed at the rear end of the second plate portion.
The combustion device for a water heater according to any one of claims 1 to 3, wherein the first slit and the second slit are provided at intervals in the left-right direction. A water heater provided with a combustion device for the water heater according to any one of claims 1 to 4.

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