Water heater

Abstract

To suppress deterioration in design property.SOLUTION: A water heater includes an exhaust pipe 16 fixed to the inside of a storage space including a door D with a door hole DH that is capable of opening and closing on a front side and projecting forward thereof, where the exhaust pipe 16 is inserted through the door hole DH from the inside of the storage space toward the outside while the door D is closed. The water heater includes a cover member 90 disposed around the exhaust pipe 16 inside the storage space to cover a peripheral part of the exhaust pipe 16 of the water heater from a front side.SELECTED DRAWING: Figure 9

Description

[Technical field]

[0001] The present disclosure relates to water heaters. [Background technology]

[0002] As a water heater installed in a pipe shaft of a collective housing such as an apartment or condominium, for example, the water heater described in JP 2017-211135 A (Patent Document 1 below) is known. This water heater is attached to a fixed frame installed in a pipe shaft of the collective housing. A door capable of covering the water heater is installed on the front side of the fixed frame. This door is provided with an opening for exposing the exhaust pipe installed on the front part of the water heater to the front side of the door. In the collective housing, the diameter of the opening is set to be slightly larger than the diameter of the exhaust pipe, and an annular gap is formed between the outer peripheral surface of the exhaust pipe and the periphery of the opening facing it. This gap is essential in consideration of the need to prevent the door from interfering with the exhaust pipe when opening and closing the door, and the supply of outside air to the water heater. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-211135 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, even when the water heater is replaced, the door is often not replaced, and if the diameter of the exhaust pipe becomes smaller as a result of replacing the water heater, the above-mentioned gap becomes larger, which can easily spoil the aesthetic appearance. [Means for solving the problem]

[0005] The water heater of the present disclosure is fixed inside a storage space having a door with a door hole at the front that can be opened and closed, and has an exhaust pipe protruding forward of it, and when the door is closed, this exhaust pipe passes through the door hole from the inside to the outside of the storage space, and the water heater is provided with a cover member that is arranged around the exhaust pipe within the storage space and covers the peripheral portion of the exhaust pipe of the water heater from the front. Effect of the Invention

[0006] According to the present disclosure, deterioration of design can be suppressed. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a front view of a hot water heater according to an embodiment. [Diagram 2] FIG. 2 is a front view of the hot water heater without the front cover. [Diagram 3] FIG. 3 is a schematic circuit diagram of the hot water heater. [Figure 4] FIG. 4 is a perspective view of the hot water heater with the cover member attached. [Diagram 5] FIG. 5 is a side view of the hot water heater with the cover member attached. [Figure 6] FIG. 6 is a front view of the hot water heater with the cover member attached. [Figure 7] FIG. 7 is a perspective view of the cover member. [Figure 8] FIG. 8 is a front view of the mounting structure for the hot water heater without the cover member attached, as viewed from the front of the door. [Figure 9] FIG. 9 is a perspective view of the mounting structure for the hot water heater with the cover member attached, as viewed from the front of the door. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] [Description of the embodiments of the present disclosure] First, embodiments of the present disclosure will be listed and described. (1) The water heater of the present disclosure is fixed inside a storage space having a door with a door hole at the front that can be opened and closed, and has an exhaust pipe protruding forward of the water heater, and when the door is closed, this exhaust pipe passes through the door hole from the inside to the outside of the storage space, and is provided with a cover member that is arranged around the exhaust pipe within the storage space and covers the peripheral portion of the exhaust pipe of the water heater from the front.

[0009] For example, when an old water heater is replaced with a new one, the diameter of the exhaust pipe of the new water heater may be smaller than that of the exhaust pipe of the old water heater. In that case, the annular gap formed between the outer circumferential surface of the exhaust pipe and the hole edge of the door hole facing it becomes larger. Then, the components of the water heater will unnaturally come into the field of view of a person through the annular gap. To address this issue, the above-mentioned water heater is provided with a cover member that is disposed around the exhaust pipe in the storage space and covers the peripheral part of the exhaust pipe in the water heater from the front. This covers the annular gap from the inside of the door and prevents the components of the water heater (for example, the front panel and a partially bulging part of the exhaust pipe) from coming into the field of view unnaturally, thereby suppressing a decrease in design. Furthermore, by painting the cover member to match the color of the door or painting it black to look like a shadow, a decrease in aesthetics can be prevented without incurring much cost.

[0010] (2) In the water heater described in (1), the water heater comprises a water heater body, a housing that opens to the front and covers the water heater body, and a front cover that closes the opening of the housing, and it is preferable that the cover member covers the peripheral portion of the exhaust pipe on the front cover from the front, and that the cover member is co-fastened to the housing by screws that fasten the front cover to the housing.

[0011] Since the cover member can be fastened together with the front cover by screws, there is no need to provide a separate structure for mounting the cover member, and the cover member can be attached to the water heater later.

[0012] [Details of the embodiment of the present disclosure] An embodiment of the present disclosure will be described with reference to Figures 1 to 9. The present disclosure is not limited to these examples, but is defined by the claims, and is intended to include all modifications within the meaning and scope of the claims.

[0013] [Overall structure of hot water heater] As shown in FIG. 9, the mounting structure 100 of the hot water heater 1 of this embodiment is a mounting structure 100 of the hot water heater 1 including the hot water heater 1 having the exhaust pipe 16 protruding forward, a door D having a door hole DH through which the exhaust pipe 16 is inserted from inside to outside, and a cover member 90 arranged around the exhaust pipe 16 and covering the peripheral part of the exhaust pipe 16 in the hot water heater 1 from the front. This hot water heater 1 is installed in a storage space of an apartment building. The door D is provided on the front side of the storage space, covers the hot water heater 1 from the front, and is configured to be openable and closable. The hot water heater 1 has both a hot water supply function of heating supplied tap water and supplying hot water to the outside, and a heating function of supplying hot water to a radiator installed in the outside room or under the floor, and heating the room or floor. In detail, the hot water heater 1 has a hot water supply circuit A, a heating circuit B, and a bath circuit C.

[0014] As shown in FIG. 2, the hot water heater 1 includes a housing 70, an inner body 2 housed in the housing 70, a front cover 72, a controller 79, and the like. The housing 70 includes a box-shaped housing body 71 having an opening 71A on the front side, and the opening 71A of the housing body 71 is closed by a front cover 72 (see FIG. 1). The housing body 71 includes a bottom plate 71B located on the lower side when viewed from the front, a left side plate 71C located on the left side when viewed from the front, a right side plate 71D located on the right side when viewed from the front, a top plate 71E located on the upper side when viewed from the front, and a rear wall 71F located on the rear side. As shown in FIG. 1, the front cover 72 includes an exhaust port 73 in which the exhaust pipe 16 is housed, an air intake port 74 for taking in outside air, and the like. The front cover 72 is fixed to the upper end of the housing body 71 by a pair of screws 7, 7.

[0015] 2, the inner body 2 is equipped with a hot water supply combustion chamber 4, a heating combustion chamber 5, a hot water supply primary heat exchanger 11, a heating primary heat exchanger 13, a hot water supply secondary heat exchanger 12, a heating secondary heat exchanger 14, and an exhaust hood 15. The inner body 2 is partitioned into left and right halves, with the hot water supply combustion chamber 4, the hot water supply primary heat exchanger 11, and the hot water supply secondary heat exchanger 12 provided on the right side, and the heating combustion chamber 5, the heating primary heat exchanger 13, and the heating secondary heat exchanger 14 provided on the left side.

[0016] As shown in Fig. 3, the hot water heater 1 has a hot water supply combustion chamber 4 and a heating combustion chamber 5 separated by a partition member 3, and a burner 6, inside an inner body 2. The burner 6 includes a hot water supply burner 6A disposed in the lower part of the hot water supply combustion chamber 4, and a heating burner 6B disposed in the lower part of the heating combustion chamber 5. Each combustion chamber 4, 5 is provided with an ignition plug 8 and a flame rod 9. A combustion fan 10 is provided in the lower part of the inner body 2 to supply combustion air to each burner 6A, 6B.

[0017] A hot water supply primary heat exchanger 11 and a hot water supply secondary heat exchanger 12 through which the combustion exhaust gas of the hot water supply burner 6A passes are provided at the upper part of the hot water supply combustion chamber 4. A heating primary heat exchanger 13 and a heating secondary heat exchanger 14 through which the combustion exhaust gas of the heating burner 6B passes are provided at the upper part of the heating combustion chamber 5. Each secondary heat exchanger 12, 14 is housed in an exhaust hood 15 provided at the upper part of the inner body 2. The exhaust hood 15 is formed with an exhaust pipe 16 that discharges the combustion exhaust gas that has passed through each secondary heat exchanger 12, 14.

[0018] A gas pipe 17, to which gas piping from the outside is connected, is connected to a gas inlet provided on the bottom plate 71B of the housing 70. Gas branch pipes 18, 18, ... branching off from the gas pipe 17 are connected to each of the hot water supply burners 6A and the heating burner 6B, and each gas branch pipe 18 is provided with a gas solenoid valve 19 for opening and closing the gas flow path. In addition, a main gas solenoid valve 20 and a gas proportional valve 21 are provided from the upstream side on the gas pipe 17 before branching.

[0019] A water supply pipe 22 is connected to the inlet of the heat absorption pipe of the hot water supply secondary heat exchanger 12. The water supply pipe 22 is provided with a strainer 23 equipped with a drain plug, a hot water supply water volume sensor 24 for detecting the volume of water flowing through the water supply pipe 22, a hot water supply water inlet thermistor 25 for detecting the inlet water temperature, and a water volume control valve 26 for controlling the volume of water flowing through the water supply pipe 22, from the upstream side. The outlet of the heat absorption pipe is connected to the inlet of the heat transfer pipe of the hot water supply primary heat exchanger 11, and a hot water outlet pipe 27 is connected to the outlet of the heat transfer pipe. The hot water outlet pipe 27 is provided with a hot water supply heat exchanger thermistor 28 for detecting the outlet temperature from the hot water supply primary heat exchanger 11, and a hot water outlet thermistor 29 for detecting the outlet temperature of hot water from the appliance downstream of the hot water supply heat exchanger thermistor 28. A bypass pipe 30, which bypasses the hot water primary and secondary heat exchangers 11, 12, is connected between the upstream side of the hot water outlet thermistor 29 in the hot water outlet pipe 27 and the downstream side of the water volume control valve 26 in the water supply pipe 22, and a water distribution valve 31 is provided in the bypass pipe 30 to control the bypass flow rate.

[0020] Thus, within the housing 70, a hot water supply circuit A is formed in which water from the water supply pipe 22 passes through the hot water supply secondary heat exchanger 12 and the hot water supply primary heat exchanger 11 in that order, is heated by heat exchange with the combustion exhaust gas from the hot water supply burner 6A, and is then discharged from the hot water supply pipe 27.

[0021] On the other hand, the inlet of the heat absorption pipe of the heating secondary heat exchanger 14 is connected to the heating return pipe 32 connected to the heating return port 76. The heating return port 76 is connected to the downstream end of the pipe extending from the high-temperature radiator 33 and the low-temperature radiator 34 outside the hot water heater 1. The high-temperature radiator 33 is, for example, a heating blower that blows hot air into the room. The low-temperature radiator 34 is, for example, a floor heater. The outlet of the heat absorption pipe of the heating secondary heat exchanger 14 is connected to the intermediate pipe 35. The intermediate pipe 35 is provided with a heating tank 69 and a heating circulation pump 36. The heating tank 69 is for preventing the pipes constituting the heating circuit B from being damaged when the liquid (water in this embodiment) circulating in the heating circuit B is heated and expands. The heating tank 69 is provided with a heating low-temperature thermistor 37.

[0022] The downstream end of the intermediate piping 35 is connected to the heating low-temperature outgoing pipe 38 and the inlet of the heat transfer pipe of the heating primary heat exchanger 13. A thermal valve 39 is disposed downstream of the heating low-temperature outgoing pipe 38, and branches off the heating low-temperature outgoing pipe 38. The downstream end of the thermal valve 39 is a heating low-temperature outgoing port 77. The heating low-temperature outgoing port 77 is connected to the low-temperature radiator 34.

[0023] The outlet of the heat transfer tube of the heating primary heat exchanger 13 is connected to the heating high-temperature forward pipe 40. The downstream end of the heating high-temperature forward pipe 40 is a heating high-temperature forward port 75. The heating high-temperature forward port 75 is connected to the high-temperature radiator 33. The heating high-temperature forward pipe 40 is provided with a heating high-temperature thermistor 41. The heating high-temperature forward pipe 40 and the heating return pipe 32 are connected by a bath heating pipe 42. The bath heating pipe 42 is provided with a reheating flow control valve 43. A heating bypass pipe 44 that bypasses the heating primary and heating secondary heat exchangers 13 and 14 is connected between the upstream side of the heating tank 69 in the intermediate pipe 35 and the heating high-temperature forward pipe 40, and the heating bypass pipe 44 is provided with a bypass thermo-operated valve 45 that controls the bypass flow rate.

[0024] Therefore, in the heating circuit B, the hot water heated in the heating secondary heat exchanger 14 circulates to the heating return pipe 32 via the intermediate piping 35, the heating tank 69, the heating low-temperature forward pipe 38, and the low-temperature radiator 34, and also flows into the heating primary heat exchanger 13 via the intermediate piping 35. The hot water heated in the heating primary heat exchanger 13 returns to the heating return pipe 32 via the heating high-temperature forward pipe 40 and the high-temperature radiator 33, and circulates to the heating primary heat exchanger 13 via the heating secondary heat exchanger 14, the intermediate piping 35, and the heating tank 69.

[0025] The bath circuit C is provided with a bath heat exchanger 46 into which the bath heating pipe 42 is inserted. The inlet of the bath heat exchanger 46 is connected to a bath return pipe 47. The bath return pipe 47 is connected to a bathtub 49 via an external bath return pipe 48. A bath circulation pump 50 is provided downstream of the bath return pipe 47. A bath return thermistor 51 that detects the bath return temperature is provided upstream of the bath circulation pump 50. A water flow switch 52 and a water level sensor 53 are provided downstream of the bath circulation pump 50. The outlet of the bath heat exchanger 46 is connected to a bath supply pipe 54. The bath supply pipe 54 is connected to the bathtub 49 via an external bath supply pipe 55. A bath supply thermistor 56 that detects the bath supply temperature is provided in the bath supply pipe 54.

[0026] In addition, a drop pipe 57 is connected between the downstream side of the bypass pipe 30 in the hot water outlet pipe 27 and the upstream side of the bath circulation pump 50 in the bath return pipe 47. This drop pipe 57 is provided with a drop water solenoid valve 58 that opens and closes the drop pipe 57, and a bath water volume sensor 59 that detects the amount of water flowing through the drop pipe 57 from the upstream side (hot water outlet pipe 27 side). The drop pipe 57 makes it possible to supply hot water heated in the hot water supply circuit A to the bathtub 49. Three check valves 60, 60, 60 are provided downstream of the bath water volume sensor 59. A cutoff valve 61 is connected between these check valves 60. This cutoff valve 61 is connected to a drain pipe 62 and an introduction pipe 63 connected to the downstream side of the strainer 23 in the water supply pipe 22. When the internal pressure of the hot water in the drop pipe 57 increases due to the back pressure from the bath return pipe 47 and becomes greater than the back pressure from the inlet pipe 63, the cut-off valve 61 discharges the hot water that flows back from the drop pipe 57 through the drain pipe 62 to the overflow outlet.

[0027] In this way, a bath circuit C that circulates hot and cold water in the bathtub 49 is formed by the bath heat exchanger 46, the bath supply pipe 54, the bath return pipe 47, etc.

[0028] A neutralizer 64 for neutralizing drain generated in the hot water secondary heat exchanger 12 and the heating secondary heat exchanger 14 is provided within the housing 70. This neutralizer 64 is connected to a drain receiver 66 provided on the bottom surface of the exhaust hood 15 via a drain inlet pipe 65, and is also connected to the drain pipe 62 of the cut-off valve 61 via a drain outlet pipe 67. The neutralizer 64 is provided with a water level electrode 68 for detecting the water level.

[0029] Controller 79 (not shown in FIG. 3) receives detection signals from thermistors, sensors, etc. and operates valves, etc. to control the outlet hot water temperature, fill bathtub 49 with hot water, and control the heating temperature, etc. Although not shown, hot water heater 1 is equipped with a remote control, etc. that is communicatively connected to controller 79.

[0030] [Cover material] 7, the cover member 90 includes a cover body 91 having a plate shape extending in the up-down and left-right directions, and an attachment portion 92 for attaching the cover body 91 to the housing 70. The cover body 91 is substantially rectangular when viewed from the front. An insertion hole 93 for inserting the exhaust pipe 16 is formed in the center of the cover body 91 so as to penetrate in the front-rear direction.

[0031] The mounting portion 92 is in the shape of a plate extending in the left-right and front-rear directions. The cover body 91 is connected to the front edge of the mounting portion 92. The cover body 91 is formed by bending a stamped metal sheet at the front edge of the mounting portion 92. For this reason, a cut-out hole 94 is formed in the center of the mounting portion 92 in the left-right direction by cutting and raising the upper end portion of the cover body 91.

[0032] An attachment piece 95 is formed on the edge of the hole of the mounting portion 92 to be attached and fixed to the housing 70. The attachment piece 95 is in the form of a plate extending in the up-down and left-right directions. A pair of screw holes 96 are formed at both left and right ends of the attachment piece 95, penetrating in the front-rear direction.

[0033] As shown in Fig. 4, the cover member 90 is attached to the front surface of the front cover 72. The exhaust pipe 16 of the hot water heater 1 is inserted into the insertion hole 93 of the cover body 91. The mounting piece 95 of the mounting portion 92 is fixed to the upper end portion of the front cover 72 by a pair of screws 7, 7. As can be seen from Figs. 1 and 6, the screws 7 are the screws 7 used to fix the front cover 72 to the housing body 71 when the cover member 90 is not used, and the cover member 90 and the front cover 72 are fastened together to the housing body 71 by the common screws 7, 7.

[0034] 5, a large diameter portion 16C is formed at a position closer to the rear end 16B than to the front end 16A of the exhaust pipe 16. A cover body 91 of the cover member 90 is disposed along the front end of the large diameter portion 16C. Therefore, a rear gap 97 corresponding to the front-to-rear dimension of the attachment piece 95 is formed between the cover body 91 and the front cover 72.

[0035] The hot water heater 1 of this embodiment is fixed inside a storage space (e.g., a pipe shaft) of a collective housing such as an apartment or condominium. The storage space is open forward and has a door D that covers the hot water heater 1 installed inside from the front. This door D has a door hole DH through which the exhaust pipe 16 of the hot water heater 1 is inserted from the inside to the outside of the storage space when the door D is closed. An annular front gap 98 is formed between the outer peripheral surface of the exhaust pipe 16 and the hole edge of the door hole DH. The front gap 98 is located in front of the rear gap 97. The cover member 90 is arranged around the exhaust pipe 16 in the storage space and covers the peripheral portion of the exhaust pipe 16 in the hot water heater 1 from the front.

[0036] The door hole DH is formed to match the outer diameter of the exhaust pipe of the hot water heater installed when the apartment house is newly constructed, so that parts other than the exhaust pipe are not exposed to the outside. However, when the hot water heater is replaced with a new hot water heater due to aging or the like, the outer diameter of the exhaust pipe may become smaller than that of the previous exhaust pipe. In such a case, the front gap 98 becomes larger in the radial direction, which is likely to impair the aesthetic appearance. For example, as shown in FIG. 8, the surrounding parts of the large diameter part 16C of the exhaust pipe 16 and the like are visible to people through the front gap 98.

[0037] Therefore, in the mounting structure 100 of the hot water heater 1 of this embodiment, the cover member 90 prevents the components of the hot water heater 1 (for example, the front panel 72 and a partially bulging portion of the exhaust pipe 16) from unnaturally coming into view. The door hole DH of the door D may be located at a position higher than the human eye level, and the components of the hot water heater 1 may be easily seen by looking into the inside of the door D from below. Therefore, for example, as shown in FIG. 9, the cover member 90 is located inside the door D to prevent the components of the hot water heater 1 from unnaturally coming into view, thereby preventing a decrease in design. In addition, the cover member 90 can be painted to match the color of the door D of the apartment building, or painted black to resemble a wall, thereby further preventing a decrease in aesthetics without incurring too much cost.

[0038] [Effects of the embodiment] As described above, the hot water heater / heating unit 1 of the embodiment is fixed inside a storage space having an openable door with a door hole at the front, and has an exhaust pipe protruding forward of it, and when the door is closed, this exhaust pipe is inserted through the door hole from the inside to the outside of the storage space, and is provided with a cover member that is arranged around the exhaust pipe within the storage space and covers the peripheral portion of the exhaust pipe of the water heater from the front.

[0039] With this configuration, the annular front gap 98 is covered from the inside of the door D, and components of the hot water heater 1 (for example, the front panel 72 and the protruding portion of the exhaust pipe 16) are prevented from unnaturally coming into view, thereby suppressing a decrease in design. Furthermore, by painting the cover member 90 to match the color of the door D or painting it black to resemble a shadow, a decrease in aesthetic appearance can be prevented without incurring too much expense.

[0040] The hot water heater 1 of this embodiment comprises an inner body 2, a housing 70 that opens forward and covers the inner body 2, and a front cover 72 that closes the opening 71A of the housing 70, and the cover member 90 covers the peripheral portion of the exhaust pipe 16 on the front cover 72 from the front, and the cover member 90 is fastened to the housing 70 by screws 7 that fasten the front cover 72 to the housing 70.

[0041] Because cover member 90 can be fastened together with front cover 72 by screws 7, there is no need to provide a separate structure for mounting cover member 90, and cover member 90 can be attached to hot water heater 1 later.

[0042] [Other embodiments] (1) In the above embodiment, the water heater is used as a hot water heater / heater. However, the water heater may be used as a hot water heater with a bath, a single-function water heater, a dedicated hot water heater, or the like.

[0043] (2) In the above embodiment, the cover member 90 and the front cover 72 are fastened together to the housing 70 by the screws 7, but the cover member 90 and the front cover 72 may be separately fixed to the housing 70. In addition, the cover member 90 may be fixed to the back surface of the door D. [Explanation of symbols]

[0044] 1: Hot water heater (water heater) 2: Inner body (water heater body) 3: Partition member 4: Water heater combustion chamber 5: Heating combustion chamber 6: Burner 6A: Water heater burner 6B: Heating burner 7: Screw 8: Spark plug 9: Flame rod 10: Combustion fan 11: Water heater primary heat exchanger 12: Water heater secondary heat exchanger 13: Heating primary heat exchanger 14: Heating secondary heat exchanger 15: Exhaust hood 16: Exhaust pipe 16A: Front end 16B: Rear end 16C: Large diameter section 17: Gas pipe 18: Gas branch pipe 19: Gas solenoid valve 20: Main gas solenoid valve 21: Gas proportional valve 22: Water supply pipe 23: Strainer 24: Water supply volume sensor 25: Water supply inlet thermistor 26: Water volume control valve 27: Water outlet pipe 28: Water supply heat exchanger thermistor 29: Hot water outlet thermistor 30: Bypass pipe 31: Water distribution valve 32: Heating return pipe 33: High temperature radiator 34: Low temperature radiator 35: Intermediate pipe 36: Heating circulation pump 37: Heating low temperature thermistor 38: Heating low temperature supply pipe 39: Thermal valve 40: Heating high temperature supply pipe 41: Heating high temperature thermistor 42: Bath heating pipe 43: Reheating flow control valve 44: Heating bypass pipe 45: Bypass thermal valve 46: Bath heat exchanger 47: Bath return pipe 48: External bath return pipe 49: Bathtub 50: Bath circulation pump 51: Bath return thermistor 52: Water flow switch 53: Water level sensor 54: Bath supply pipe 55: External bath supply pipe 56: Bath supply thermistor 57: Drop-in pipe 58: Drop-in water solenoid valve 59: Bath water level sensor 60: Check valve 61: Cut-off valve 62: Drain pipe 63: Inlet pipe 64: Neutralizer 65: Drain inlet pipe 66: Drain receiver 67: Drain discharge pipe 68: Water level electrode 69: Heating tank 70: Housing 71: Housing body 71A: Opening 71B: Bottom plate 71C: Left side plate 71D: Right side plate 71E: Top plate 71F: Rear wall 72: Front cover 73: Exhaust port 74: Inlet port 75: High-temperature heater outlet 76: Heater return port 77: Low-temperature heater outlet 79: Controller 90: Cover member 91: Cover body 92: Mounting portion 93: Through hole 94: Cut-out hole 95: Mounting piece 96: Screw hole 97: Rear gap 98: Front gap 100: Mounting structure A: Hot water circuit B: Heating circuit C: Bath circuit D: Door DH: Door hole

Claims

1. It is fixed inside a storage space with a door that can be opened and closed at the front, It has an exhaust pipe protruding forward of itself, The exhaust pipe is inserted through the door hole from the inside to the outside of the storage space when the door is closed, A water heater comprising a cover member arranged around the exhaust pipe within the storage space and covering the peripheral portion of the exhaust pipe of the water heater from the front.

2. The water heater includes a water heater body, a housing that opens forward and covers the water heater body, and a front cover that closes the opening of the housing, The water heater of claim 1, wherein the cover member covers the peripheral portion of the exhaust pipe on the front cover from the front, and the cover member is fastened to the housing by screws that fasten the front cover to the housing.

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