JP7327794B2 - Combustion device for water heater and water heater - Google Patents

Description

The present disclosure relates to water heaters.

2. Description of the Related Art Conventionally, there has been known a combustion apparatus for a water heater in which a partition wall is provided in a common housing, and a group of burners for supplying hot water and a group of burners for circulating heating are arranged on the left and right sides of the partition wall. An example of this type of combustion device is disclosed in US Pat.

JP 2014-169847 A

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

Therefore, in order to solve at least one of the above-described problems, a configuration is provided in which the partition can be easily and accurately and efficiently installed in the housing that constitutes the combustion apparatus.

A combustion device for a water heater according to one aspect of the present disclosure includes:
a burner group comprising a plurality of burners;
a housing that accommodates the burner group;
a partition that partitions the inside of the housing;
with
The burner group includes a first burner group having a plurality of first burners and a second burner group having a plurality of second burners, and the first burner group is positioned within the housing to accommodate the second burner group. It is arranged on one side in the left-right direction from the burner group,
The housing has a rear plate arranged behind the burner group, a pair of side plates arranged on both left and right sides of the burner group, and a lid portion arranged in front of the burner group. death,
An insertion part that protrudes forward and extends in the left-right direction is provided on the front part of the back plate on the inner side of the housing,
The partition portion includes a first plate surface facing the first burner group, a second plate surface facing the second burner group, a rear end facing the front surface of the back plate, and the a plate-shaped configuration including a front end portion facing the lid portion;
The rear end of the partition part is partially formed with a slit recessed forward,
The partition part is fixed to the back plate with the insertion part inserted into the slit.

A water heater according to one aspect of the present disclosure includes
A combustion device for the water heater is provided.

According to the configuration of the present disclosure, it becomes easier to accurately and efficiently mount the partition in the housing that constitutes 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 conceptually illustrating the configuration of the water heater. FIG. 3 is a partially enlarged cross-sectional view taken along line AA (cutting position along line AA) in FIG. 4 is a partially enlarged cross-sectional view taken along line BB (cutting position BB) of FIG. 3. FIG. FIG. 5 is a perspective view of the combustion apparatus according to the first embodiment, showing a state in which a front lid is removed. 6 is a perspective view showing a state in which the frame portion (cover portion) is removed from the state shown in FIG. 5. FIG. 7 is a perspective view showing a state in which the burner group is removed from the state shown in FIG. 6. FIG. 8 is a perspective view showing a state in which the partition is removed from the state shown in FIG. 7. FIG. 9 is a perspective view showing a state in which the partition is disassembled from the state shown in FIG. 8. FIG. 10 is a perspective view showing a state in which the partition is disassembled from the state of FIG. 8 from a direction different from that of FIG. 9. FIG. 11 is a perspective view illustrating a partition used in the combustion apparatus 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. 8. FIG. 14 is a front view of the state of FIG. 7. FIG. 15 is a front view of the state of FIG. 8. FIG. FIG. 16 is a sectional view showing a CC section of FIG. 12. FIG. 17 is a cross-sectional view showing a DD cross section of FIG. 12. FIG. 18 is a cross-sectional view showing the EE cross section of FIG. 12. FIG.

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

In the combustion device of the present disclosure, when attaching the partition to the inside of the housing that constitutes the combustion device, the insertion portion provided on the front surface of the back plate is inserted into the slit formed at the rear end of the partition. It can be temporarily fixed as follows. Such a configuration makes it easier for the operator to align and hold the partition in the vicinity of the correct position when installing the partition in the housing. Then, in such a stably temporarily fixed state, the partition can be fixed to the back plate, so that the partition can be easily mounted at an accurate position in the housing.

In the combustion apparatus of the present disclosure, the partition is a plate-shaped partition wall arranged so that one plate surface faces the first burner group side and the other plate surface faces the second burner group side. and a plate-like bent piece that is bent from the partition wall and arranged to face the front surface of the back plate. In the combustion device, the bent piece and the back plate may be fixed by inserting a screw member 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-like bent piece and the back plate are overlapped, the stability of the temporary fixing can be further enhanced. In addition, since it is possible to fix (permanently fix) by inserting the screw member from the front side into the overlapped portion that has been superimposed by temporary fixation, the workability at the time of final fixation is further improved.

In the combustion device of the present disclosure, slits may be formed in the bent pieces so as to extend in the left-right direction. The bent piece may comprise a first bent piece arranged above the slit and a second bent piece arranged below the slit.

Since this combustion device can be temporarily fixed by inserting the insertion portion into the slit formed extending in the left-right direction, it is possible to reduce wobble at the time of temporary fixing. Therefore, this combustion device can further enhance the stability during temporary fixation.

In the combustion device of the present disclosure, the partition includes a first plate portion and a second plate portion, and the first plate portion and the second plate portion are integrally connected. good. A first slit, which is one of the slits, may be formed in the rear end portion of the first plate portion. A second slit, which is one of the slits, may be formed in the rear end portion of the second plate portion. The first slit and the second slit may be provided with an interval in the left-right direction.

This combustion device can be temporarily fixed by inserting the insertion part into a plurality of slits formed at positions apart from each other in the partition part, so compared to a configuration in which the insertion part is inserted only at one position Wobble and the like are further suppressed. Therefore, this combustion device can further enhance the stability during temporary fixation.

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

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

As shown in FIG. 4 , the secondary heat exchange device 200 is arranged above the primary heat exchange device 100 . The secondary heat exchange device 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. and 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 that houses the burner group 308 and the like. The burner group 308 includes a hot water supply burner group 310 that generates combustion exhaust gas to be sent to the hot water supply primary heat exchanger 110 and the hot water supply secondary heat exchanger 210, the bath primary heat exchanger 120, and the bath secondary heat exchanger. There are two burner groups, a bath burner group 320 that generates the combustion exhaust that is sent to 220 .

As shown in FIG. 3 , the exhaust hood 400 has a lower end connected to the primary heat exchange device 100 and an upper end connected to the secondary heat exchange device 200 . The exhaust hood 400 opens downward at its lower end and communicates with the space inside the primary heat exchange device 100 . In addition, the exhaust hood 400 is open forward at its upper end and communicates with the space inside the secondary heat exchange device 200 .

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

Water heater 1 circulates combustion exhaust gas generated by burner groups 310 and 320 of combustion device 300 to primary heat exchange device 100 above combustion device 300 . Furthermore, in the water heater 1 , combustion exhaust gas from 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 exchange device 100 exchanges heat between the water passing through the hot water supply primary heat exchanger 110 and the bath primary heat exchanger 120 and the combustion exhaust gas. The primary heat exchange device 100 recovers sensible heat of combustion exhaust. The combustion exhaust that has passed through the primary heat exchange device 100 enters the secondary heat exchange device 200 from behind through the exhaust hood 400 .

The secondary heat exchange device 200 exchanges heat between the water flowing through the hot water supply secondary heat exchanger 210 and the bath secondary heat exchanger 220 and the combustion exhaust gas. The secondary heat exchange device 200 recovers the latent heat of the combustion exhaust.

As shown in FIG. 2, the water heater 1 is configured with 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 for heating water from a tap or the like and causing it to flow out as hot water. In the hot water supply circuit 10, water flows into the water inlet pipe 12 from a water inlet 11 connected to a water supply source such as tap water, and flows into a hot water supply secondary heat exchanger 210 (specifically, the hot water supply secondary heat exchanger 210 Heat transfer pipe 211) and hot water supply primary heat exchanger 110 (specifically, heat transfer pipe 111 of hot water supply primary heat exchanger 110) are passed through in order, and heat is exchanged with the combustion exhaust of hot water supply burner group 310 to produce water. is heated, hot water is circulated through the hot water outlet pipe 13, and hot water is discharged from the hot water outlet 14. - 特許庁Pipe line 15 is a pipe between hot water supply secondary heat exchanger 210 and hot water supply secondary heat exchanger 210 .

The bath circuit 20 is a circuit for circulating and heating the hot water in the bathtub B. The bath circuit 20 sucks the hot water in the bathtub B from the hot water inlet 21 communicating with the opening in the bathtub B into the return pipe 22 by the circulation pump P, and the secondary heat exchanger 220 for the bath (specifically, the second heat exchanger for the bath). Heat transfer tube 221 of secondary heat exchanger 220), and primary heat exchanger 120 for bath (specifically, heat transfer tube 121 of primary heat exchanger 120 for bath), while water is passed in order, and combustion exhaust of burner group 320 for bath is 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 bathtub B through the going pipe 23. - 特許庁In addition, the pipe line 40 is a pipe between the bath secondary heat exchanger 220 and the bath primary heat exchanger 120 .

As shown in FIGS. 1 and 2, the water heater 1 includes a drain hose 31 and a neutralizer 32. As shown in FIG. The drain hose 31 has an upstream side connected to a drain outlet provided in the secondary heat exchange device 200 and a downstream side 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 includes, for example, a known microcomputer, is configured to be able to acquire signals from various sensors provided in the water heater 1, and operates various actuators provided in the water heater 1. 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 water flow in the water inlet pipe 12 . As another example, when the water flow sensor (not shown in FIG. 1) detects water flow through the return pipe 22, the water heater 1 operates the bath burner group 320 to reheat the bath. obtain.

The primary heat exchange device 100 is a sensible heat recovery type heat exchange device. The primary heat exchange device 100 includes a can body 130, a hot water supply primary heat exchanger 110, and a bath primary heat exchanger 120, as shown in FIG. The can body 130, the hot water supply primary heat exchanger 110, and the bath primary heat exchanger 120 may be made of, for example, copper, which has excellent thermal conductivity.

The can body 130 has a substantially rectangular shape in plan view that is elongated in the left-right direction, and is formed in a cylindrical shape penetrating vertically. The interior of the can body 130 is partitioned left and right by a partition portion 131 . The hot water supply primary heat exchanger 110 and the bath primary heat exchanger 120 are arranged side by side in the horizontal direction in the can body 130 via the partition portion 131 . In other words, the hot water supply primary heat exchanger 110 is housed in the right space partitioned by the partition portion 131 inside the can body 130 , and the bath primary heat exchanger 120 is housed in the partition portion 131 inside 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 . Secondary heat exchange device 200 and primary heat exchange device 100 are connected by exhaust hood 400 . The secondary heat exchange device 200 includes a housing 230 , a hot water supply secondary heat exchanger 210 , and a bath secondary heat exchanger 220 . The hot water supply secondary heat exchanger 210 is housed in the right space partitioned by the partition 231 in the housing 230, and the bath secondary heat exchanger 220 is partitioned by the partition 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 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 forms a combustion exhaust passage by communicating the upper end opening of the can body 130 of the primary heat exchange device 100 and the inlet 232 of the rear wall of the housing 230 of the secondary heat exchange device 200. . The inside of the exhaust hood 400 is partitioned left and right by a partition portion 401 . The partition part 401 connects the upper end of the partition part 131 of the primary heat exchange device 100 and the rear end of the partition part 231 of the secondary heat exchange device 200, corresponding to each of the hot water supply circuit 10 and the bath circuit 20. forming a space.

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

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

As shown in FIG. 5, the housing 330 has a substantially rectangular shape in plan view that is elongated in the left-right direction and has an open upper end. The housing 330 has a square tubular shape similar to the can body 130 . The interior of the housing 330 is partitioned into left and right by a partition portion 350 . The housing 330 includes a rear plate 344 arranged behind the burner group 308, a pair of side plates 341 and 342 arranged on both left and right sides of the burner group 308, and a lid portion arranged in front of the burner group 308. 346 and . Furthermore, the pair of side plates 341 and 342 extend forward from both left and right ends of the rear plate 344 , and the lid portion 346 is fixed to the front ends of the pair of side plates 341 and 342 . In this manner, the back plate 344, the pair of side plates 341 and 342, and the cover portion 346 are configured in a frame shape to surround the burner group 308 on all four sides. In addition, in FIG. 5, the lid portion 346 is conceptually indicated by a chain double-dashed line. A bottom plate 347 is fixed to the lower end side of the rear plate 344, the pair of side plates 341 and 342, and the lid portion 346, and the housing 330 has a box-like shape as a whole. The upper end of housing 330 is connected and fixed to the lower end of can body 130 of primary heat exchange device 100 by caulking, and the internal space of housing 330 and the internal space of 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 inside the housing 330 .

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

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

As shown in FIGS. 5 to 7, the partition 350 is a plate-like portion that partitions the inside of the housing 330. As shown in FIG. As shown in FIGS. 7 to 10, the partition portion 350 has a configuration in which a first plate portion 360, a second plate portion 370, and a third plate portion 380 are stacked in the left-right direction. , are arranged in the housing 330 in a plate-like form as a whole, with the left-right direction being the thickness direction. Each of the first plate portion 360, the second plate portion 370, and the third plate portion 380 is made of a metal plate, and is partially processed to be uneven or bent. 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 bathing burner group 320 (second burner group) side, and a back surface. It has a plate-like configuration including a rear end portion 353 facing the front 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 the surface on the hot water supply burner group 310 (first burner group) side. The second plate surface portion 352 is a portion that constitutes the surface of the second plate portion 370 on the bath burner group 320 (second burner group) side. The rear end portion 353 is a portion that constitutes the rear end of the plate-shaped partition portion 350 and is a portion that faces the front portion of the back plate 344 . Specifically, the rear end portions of the first plate portion 360 , the second plate portion 370 , and the third plate portion 380 constitute the rear end portion 353 . The front end portion 355 is a portion that constitutes the front end of the partition portion 350 configured in a plate shape. A portion 355 is configured and arranged to face the lid portion 346 .

The first plate portion 360 includes a plate-like first wall portion 362 and a bent piece 364 bent from the first wall portion 362 . The second plate portion 370 includes a plate-like second wall portion 372 and a bent piece 374 bent 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 a partition wall, and are arranged so that one plate surface faces the first burner group side, and the other plate surface It has a plate-like shape 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 are bent from the partition wall and have a plate-like configuration (plate piece configuration) arranged facing the front surface of the rear panel 344. . In the combustion device 300, the bent pieces 364, 374 and the back plate 344 are fixed to each other by inserting a screw member 358 from the front side into the overlapping portion 356 where the bent pieces 364, 374 and the back plate 344 overlap. .

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

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

Specifically, a first slit 366 is formed in the bent piece 364 so as to extend in the left-right direction. A second slit 376 is formed in the bent piece 374 so as to extend in the left-right direction. The bent piece 364 includes a first bent piece 364A arranged above the slit 354 (specifically the first slit 366) and a first bent piece 364A arranged below the slit 354 (specifically the first slit 366). and two bent pieces 364B. In addition, the bent piece 374 includes the first bent piece 374A arranged above the slit 354 (specifically the second slit 376) and the bent piece 374A arranged below the slit 354 (specifically the second slit 376). and a second bent piece 374B. Furthermore, 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 section 350 is fixed to the back plate 344 with the insertion section 348 inserted into the slit 354 . Specifically, the insertion portion 348 is positioned and fixed so as to enter into any of the first slit 366 , the second slit 376 , and the third slit 386 .

3. Examples of Actions and Effects Next, the actions and effects of the water heater 1 and the combustion device 300 described above will be exemplified.
The combustion device 300 includes a burner group 308 having a plurality of burners, a housing 330 that houses the burner group 308, and a partition section 350 that partitions the inside of the housing 330. The burner group 308 has a first burner group comprising a plurality of first burners and a second burner group comprising a plurality of second burners. The first burner group is arranged on one side in the left-right direction of the second burner group in the housing 330 . The housing 330 includes a rear plate 344 arranged behind the burner group 308, a pair of side plates 341 and 342 arranged on both left and right sides of the burner group 308, and a lid portion arranged in front of the burner group 308. 346 and . An insertion portion 348 is provided on the front surface of the back plate 344 on the inner side of the housing and extends in the left-right direction while protruding forward. 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, a rear end portion 353 facing the front surface portion of the rear plate 344, and a front end portion 355 facing the lid portion 346 . A slit 354 recessed forward is formed in a part of the rear end of the partition 350 , and the partition 350 is fixed to the back plate 344 with an insertion part 348 inserted into the slit 354 . .

Combustion device 300 configured in this manner is configured such that when partition 350 is attached to the inside of housing 330 that constitutes combustion device 300 , insertion portion 348 provided on the front surface of rear plate 344 is inserted behind partition 350 . It can be temporarily fixed so as to be inserted into a slit 354 formed in the end portion 353 . With such a configuration, when the partition 350 is installed in the housing 330 (during maintenance, manufacturing, or the like), the operator continues to align and hold the partition 350 in the vicinity of the correct position. Makes work easier and easier. In this state of being stably and temporarily fixed, the fixing operation can be performed so as to fix the partition 350 to the back plate 344 , so that the partition 350 can be easily attached to an accurate position within the housing 330 . Become.

In the combustion device 300, the partition part 350 is a plate-shaped first wall arranged so that one plate surface faces the first burner group side and the other plate surface faces the second burner group side. It has a portion 362 (partition wall), a second wall portion 372 (partition wall), and plate-shaped bent pieces 364 and 374 that are bent from the partition wall and arranged to face the front portion of the back plate 344 . In the combustion device 300, the bent piece 364 and the back plate 344 are fixed by inserting a screw member 358 from the front side into the overlapped portion 356 where the bent piece 364 and the back plate 344 overlap. Since this combustion device 300 can be temporarily fixed so that the plate-like bent piece 364 and the back plate 344 are overlapped, the stability of temporary fixing can be further enhanced. In addition, since the screw member 358 can be fixed (permanently fixed) by inserting the screw member 358 from the front side into the overlapped portion 356 that has been superimposed by temporary fixation, the workability at the time of final fixation is further improved.

Combustion device 300 is formed with slits (first slit 366 and second slit 376 ) extending in the left-right direction in bent pieces 364 and 374 . The bent piece 364 includes a first bent piece 364A arranged above the slit 354 (above the first slit 366) and a second bent piece 364A arranged below the slit 354 (below the first slit 366). 364B and The bent piece 374 includes a first bent piece 367A arranged above the slit 354 (above the second slit 376) and a second bent piece 367A arranged below the slit 354 (below the second slit 376). 374B and. Since this combustion device 300 can be temporarily fixed by inserting the insertion portion 348 into the slits formed extending in the left-right direction (specifically, the first slit 366 and the second slit 376), the temporary fixing is not possible. wobble can be reduced. Therefore, this combustion device 300 can further enhance the stability during temporary fixation.

In the combustion device 300, the partition part 350 includes a first plate part 360 and a second plate part 370, and the first plate part 360 and the second plate part 370 are integrally connected. A first slit 366 forming one of the slits 354 is formed at the rear end of the first plate portion 360 , and a second slit 376 forming one of the slits 354 is formed at the rear end of the second plate portion 370 . is formed. Since this combustion device 300 can be temporarily fixed by inserting the insertion portion 348 extending in the horizontal direction into a plurality of slits formed apart from each other in the horizontal direction in the partition portion 350, it is configured to be inserted only at one position. Compared to , wobble, etc. at the time of temporary fixation can be further suppressed. Therefore, this combustion device 300 can further enhance the stability during temporary fixation.

<Other embodiments>
The invention is not limited to the embodiments illustrated by the above description and drawings. For example, the features of the embodiments described above or below can be combined in any consistent manner. Also, any feature of the embodiments described above or below may be omitted if not explicitly indicated as essential. Furthermore, the embodiments described above may be modified as follows.

In the above-described embodiment, the partition section 350 is configured with 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 should be considered as examples in all respects and not restrictive. The scope of the present invention is not limited to the embodiments disclosed this time, and includes all modifications within the scope indicated by the claims or within the scope equivalent to the claims. is intended.

REFERENCE SIGNS LIST 1 water heater 300 combustion device 308 burner group 310 hot water supply burner group (first burner group)
310A... Burner (first burner)
320... Bath burner group (second burner group)
320A... Burner (second burner)
330... Case 341, 342... Side plate 344... Back plate 346... Lid part 348... Insertion part 350... Partition part 351... First plate surface part 352... Second plate surface part 353... Rear end part 354... Slit 355... Front end part 356... Overlapping portion 358... Screw member 360... First plate portion 362... First wall portion (partition wall)
364... Bending piece 364A... First bending piece 364B... Second bending piece 366... First slit 370... Second plate part 372... Second wall part (partition wall)
374... Bent piece 374A... First bent piece 374B... Second bent piece 376... Second slit 382... Third wall portion (partition wall)

Claims (3)

a burner group comprising a plurality of burners;
a housing that accommodates the burner group;
a partition that partitions the inside of the housing;
with
The burner group includes a first burner group having a plurality of first burners and a second burner group having a plurality of second burners, and the first burner group is positioned within the housing to accommodate the second burner group. It is arranged on one side in the left-right direction from the burner group,
The housing has a rear plate arranged behind the burner group, a pair of side plates arranged on both left and right sides of the burner group, and a lid portion arranged in front of the burner group. death,
An insertion part that protrudes forward and extends in the left-right direction is provided on the front part of the back plate on the inner side of the housing,
The partition portion includes a first plate surface facing the first burner group, a second plate surface facing the second burner group, a rear end facing the front surface of the back plate, and the a plate-shaped configuration including a front end portion facing the lid portion;
The rear end of the partition part is partially formed with a slit recessed forward,
The partition part is fixed to the back plate in a configuration in which the insertion part is inserted into the slit,
The partition part is
a plate-shaped partition wall arranged so that one plate surface faces 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 arranged to face the front surface of the back plate;
has
The bent piece and the back plate are fixed by a configuration in which a screw member is inserted 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 bent piece includes a first bent piece arranged above the slit and a second bent piece arranged below the slit.
Combustion device for water heater. The partition portion includes a first plate portion and a second plate portion, and has a structure in which the first plate portion and the second plate portion are integrally coupled,
A first slit, which is one of the slits, is formed at the rear end of the first plate,
A second slit, which is one of the slits, is formed at the rear end of the second plate,
2. The combustion device for a water heater according to claim 1 , wherein said first slit and said second slit are spaced apart in the left-right direction . A water heater comprising the combustion device for a water heater according to claim 1 or 2.

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