JP7169641B2 - Water heater - Google Patents

Description

The present invention relates to a water heater.

Conventionally, a water heater is provided with an electromagnetic valve unit that controls the flow rate of gas supplied to a burner (see Patent Document 1, for example). A solenoid valve unit has a metal housing, and a main valve, a proportional valve, and a switching valve are incorporated in the housing. The housing has a gas passage through which gas passes. The housing includes a valve chamber portion having a valve chamber at its upper end. An outlet of the gas passage is provided in the valve chamber. A valve body of the switching valve is provided in the valve chamber so as to be able to open and close the outlet of the gas passage, and the switching valve is provided at the upper end of the housing.

JP 2003-185134 A

Due to the layout of components such as a burner and a heat exchanger in the water heater, the solenoid valve unit may be arranged directly below the water pipe. Depending on the relationship between the temperature of the water flowing through the water pipe and the temperature inside the water heater, water may condense on the surface of the water pipe. If water condensed on the surface of the water pipe drips, it may contact the switching valve. Therefore, it is conceivable to attach a cover to the housing of the solenoid valve unit so as to cover the upper part of the housing and the switching valve. .

SUMMARY OF THE INVENTION An object of the present invention is to provide a water heater equipped with a valve unit having a cover body that can be easily and securely attached.

The water heater of the invention according to claim 1 is provided with a valve unit capable of adjusting the flow rate of gas supplied to the burner, and a water pipe arranged above the valve unit for passing water, wherein the valve unit comprises a gas pipe portion internally provided with a gas passage extending upward; a valve chamber portion provided at the upper end of the gas pipe portion and internally having a valve chamber communicating with the gas passage; a valve body provided on a side wall portion extending in a predetermined direction intersecting an upward direction and communicating with the valve chamber and including a gas outlet for discharging gas flowing into the valve chamber; a solenoid valve fixed to the valve chamber so as to be able to open and close the gas outlet by a valve body provided so as to be able to open and close the gas outlet and protrude in a direction opposite to the gas outlet side; and detachably fixed to the valve body. and a cover body covering at least above the valve body and the electromagnetic valve, wherein the cover body faces an upper surface portion covering the valve body and the electromagnetic valve from above at an outer peripheral portion of the upper surface portion. a pair of side surface portions hanging down from a pair of peripheral end portions; each of the pair of side surface portions is provided with a locked portion; and the valve body is provided at a position corresponding to the locked portion and a locking portion for locking the locked portion.

In the water heater of the invention according to claim 2, in addition to the configuration according to claim 1, the upper surface portion is formed in a rectangular shape in a plan view, and the first end portion side, which is the gas outlet side, is connected to the solenoid valve side. is inclined downward toward the second end side, and inclined to one side in a direction orthogonal to the direction in which the first end and the second end are opposed to each other, and the first end is: A wall portion protruding upward over the entire first end portion is provided.

A water heater of the invention according to claim 3 is characterized in that, in addition to the configuration according to claim 1 or 2, at least one of the pair of side surface portions is provided with a plurality of the locked portions. .

A water heater according to a fourth aspect of the invention is characterized in that, in addition to the configuration according to any one of the first to third aspects, at least a peripheral portion of the locked portion of the cover body is made of a transparent member. Characterized by

According to the water heater of the first aspect of the invention, the valve unit mounted on the water heater is attached to the cover body easily and not to come off. Further, since the cover body is engaged with the valve body at the side face rather than the top face, the cover body can prevent water from entering from the upper side of the valve unit to the inside of the cover body. Therefore, in the water heater of this aspect, even when the valve unit is installed directly below the water pipe, the cover body can effectively prevent water from coming into contact with the solenoid valve of the valve unit.

According to the water heater of the invention according to claim 2, in addition to the effect of claim 1, the cover body can control the flow of water dripping from the water pipe, and the water can be dripped from a fixed point of the cover body. can be done. Therefore, water dripping from the cover body is suppressed from coming into contact with electrical equipment around the valve unit. Moreover, the cover body can further suppress contact of water with the solenoid valve by the wall portion than the cover body according to the first aspect.

According to the water heater of the invention according to claim 3, in addition to the effect described in claim 1 or 2, the cover body provided in the valve unit does not rotate with respect to the valve body. If the cover body rotates with respect to the valve body, the cover body cannot sufficiently cover the valve body and the solenoid valve, and water drips onto the upper surface of the valve chamber and is transmitted to the solenoid valve. It is conceivable that water drips directly into the solenoid valve. Therefore, in the water heater of this aspect, the effect of the cover can be ensured by stably supporting the cover on the valve body.

According to the water heater of the invention according to claim 4, in addition to the effect described in any one of claims 1 to 3, when assembling or inspecting the water heater, the operator can touch the locking portion provided on the valve body. Since it becomes easy to grasp the positional relationship with the engaged portion provided on the cover body, the operator can easily attach or detach the cover body to or from the valve body.

2 is a perspective view of the gas water heater 1 from below; FIG. 1 is a schematic configuration diagram of a gas water heater 1. FIG. 4 is a perspective view of the periphery of the valve unit 41 from below. FIG. 4 is a perspective view of the valve unit 41 from below; FIG. 4 is a top perspective view of the valve unit 41 with the cover body 60 removed; FIG. 4 is a front view of the valve unit 41; FIG. 4 is a right side view of the valve unit 41. FIG.

Embodiments of the present invention will be described below. Unless there is a specific description, the structure of the apparatus described below is merely an example of explanation and not intended to be limiting. The drawings are used to explain technical features that can be employed by the present invention. In the following description, left and right, front and rear, and top and bottom indicated by arrows in the drawings are used.

The exterior structure of the gas water heater 1 will be described with reference to FIG. A gas water heater 1 includes a housing 2 and a front cover 3. The housing 2 is made of metal and is formed in a substantially rectangular parallelepiped shape surrounded by five sides except for the front surface. The housing 2 includes a top plate (not shown), a bottom plate 4, a left side plate (not shown), a right side plate 5, and a back plate (not shown). Mounting fittings 6 are provided at the upper and lower ends of the back plate, respectively. The bottom plate 4 is provided with a hot water outlet 11 connected to an external hot water tap, a water inlet 12 to which a water pipe is connected from the outside, and a gas inlet 13 to which a gas supply pipe is connected from the outside.

The front cover 3 is made of metal, and is formed in a substantially rectangular parallelepiped shape surrounded by five sides except the back. An opening extending in the left-right direction is provided in the upper portion of the front surface of the front cover 3, and an exhaust pipe 9 protrudes forward from the opening. A plurality of slit-shaped intake ports 10 are provided at intervals on the bottom surface and lower portions of the left and right side surfaces of the front cover 3 .

The internal structure of the housing 2 will be described with reference to FIGS. 2 and 3. FIG. Inside the housing 2, a combustion chamber 20, a combustion fan 29, a water supply pipe 31, a hot water discharge pipe 32, a bypass pipe 33, a gas pipe 40, a valve unit 41, and the like are provided. The combustion chamber 20 includes two burner groups 28 in which a plurality of burners are stacked in the horizontal direction, a heat exchanger 22 and an exhaust stack 9 . Two burner groups 28 are provided below the combustion chamber 20 . A flame rod 26 and an ignition plug 27 are provided in the vicinity of one of the two burner groups 28 . A heat exchanger 22 is provided above the two burner groups 28 . The heat exchanger 22 has a tubular body 23 through which water can flow, and water flowing through the tubular body 23 is heated by the heat of combustion exhaust gas from the two burner groups 28 . The exhaust pipe 9 is provided on the front upper portion of the combustion chamber 20 . The exhaust pipe 9 rectifies the combustion exhaust that has passed through the heat exchanger 22 and discharges it to the outside of the gas water heater 1 . A combustion fan 29 is provided directly below an opening 24 provided at the bottom of the combustion chamber 20 . A combustion fan 29 supplies secondary air through the openings 24 towards the two burner groups 28 .

The water supply pipe 31 has one end connected to the water inlet 12 and the other end connected to the inlet of the tubular body 23 of the heat exchanger 22 . The water supply pipe 31 is provided with a water flow switch 36, a water volume sensor 34, and a water volume control motor 35 in order from the upstream side through which water flows. The water flow switch 36 detects whether or not water is flowing through the water supply pipe 31 . The water volume sensor 34 measures the volume of water flowing through the water supply pipe 31 . The water volume control motor 35 controls the volume of water flowing through the water supply pipe 31 . The tapping pipe 32 has one end connected to the tapping port 11 and the other end connected to the outlet of the tubular body 23 of the heat exchanger 22 . Bypass pipe 33 is connected between water supply pipe 31 and hot water discharge pipe 32 . The bypass pipe 33 allows part of the water flowing through the water supply pipe 31 to join the hot water flowing through the hot water outlet pipe 32 .

The gas pipe 40 has one end connected to the gas inlet 13 and the other end connected to the valve unit 41 . The valve unit 41 is provided below the combustion chamber 20 . The valve unit 41 includes a source gas solenoid valve 43, a proportional valve 44, and the like, which will be described later. The valve unit 41 controls the amount of gas supplied from the gas pipe 40 toward the two burner groups 28, and supplies the gas to the two burner groups 28 via a nozzle base 46 (not shown in FIG. 3).

The operation of the gas water heater 1 will be briefly described. When the water flow switch 36 detects that water has flowed into the water supply pipe 31 from the water inlet 12 , the combustion fan 29 operates to supply air to the burner group 28 . The gas passage in the valve unit 41 is then opened and the gas supplied from the gas inlet 13 is sent to the burner group 28 . A spark generated by the discharge of the ignition plug 27 ignites the burner group 28 and burns the mixture of gas and air. The water flowing inside the tubular body 23 of the heat exchanger 22 is heated by combustion exhaust heat from the burner group 28 . When the flame rod 26 detects the flame of the burner group 28, the gas passage inside the valve unit 41 is kept open. A valve unit 41 controls the amount of gas delivered to the burner group 28 . The amount of water flowing through the water supply pipe 31 is controlled by the water amount control motor 35 based on the amount of water measured by the water amount sensor 34 . When the water flow switch 36 detects that water has stopped flowing into the water supply pipe 31 from the water inlet 12, the gas passage in the valve unit 41 is closed and the burner group 28 is extinguished. Then, the combustion fan 29 stops operating, and the gas water heater 1 stops operating.

The structure of the valve unit 41 will be described with reference to FIGS. 4 to 7. FIG. As shown in FIG. 4, the valve unit 41 includes a gas proportional valve unit 41A and a switching unit 41B. The gas proportional valve unit 41A is provided below the valve unit 41, and the switching unit 41B is provided above the valve unit 41. As shown in FIG. The gas proportional valve unit 41A controls opening/closing of the gas supplied from the gas inlet 13 and controls the amount of gas supplied to the burner group 28 . The switching unit 41B distributes and controls the gas supplied from the gas proportional valve unit 41A to the two burner groups 28 .

The gas proportional valve unit 41A includes a lower valve body 42A, a source gas solenoid valve 43, and a proportional valve 44. The lower valve body 42A is made of metal and is formed in a substantially inverted L shape. A lower gas passage (not shown) through which gas flows is provided inside the lower valve body 42A.

The source gas solenoid valve 43 is provided so as to protrude rearward from the rear portion of the lower valve body 42A. A valve body (not shown) of the source gas electromagnetic valve 43 can open and close the lower gas passage. The proportional valve 44 protrudes downward from the front lower portion of the lower valve body 42A and is provided downstream of the source gas electromagnetic valve 43 where the gas flows. A valve body (not shown) of the proportional valve 44 adjusts the amount of gas passing through the source gas electromagnetic valve 43 and flowing through the gas passage by advancing and retreating in the lower gas passage.

The switching unit 41B will be described with reference to FIGS. 5 to 7. FIG. As shown in FIG. 5, the switching unit 41B includes an upper valve body 42B and a switching solenoid valve 45. As shown in FIG. The upper valve body 42B is made of metal and formed to extend in the vertical direction. Two switching valve chamber portions 55 are provided side by side in the upper end portion of the upper valve body 42B. Gas openings 66 are provided on the front surfaces of the switching valve chambers 55 to allow the gas flowing in the switching unit 41B to flow out (see FIG. 4). The two gas openings 66 are connected with the nozzle base 46 (not shown in FIG. 5).

An upper gas passage extending in the vertical direction is provided inside the upper valve body 42B. The lower end of the upper valve body 42B is open, and when connected to the lower valve body 42A, the lower gas passage communicates with the upper gas passage. Switching valve chambers (not shown) are provided inside the switching valve chambers 55, respectively. The upper gas passage communicates with the two switching valve chambers.

The switching solenoid valve 45 is fixed to the rear end wall portion of the switching valve chamber portion 55 . A valve body (not shown) of the switching solenoid valve 45 is provided in the switching valve chamber so as to be able to advance and retreat in the front-rear direction, and can open and close the gas opening 66 . Therefore, the gas that has flowed into the two switching valve chambers is distributed and supplied to the two burner groups 28 according to the opening/closing status of the two switching solenoid valves 45 .

The structure of the cover body 60 will be described with reference to FIGS. 6 and 7. FIG. A portion of the water supply pipe 31 is arranged directly above the valve unit 41 and below the combustion chamber 20 (see FIG. 3). Due to the relationship between the temperature of the water flowing inside the water supply pipe 31 and the temperature inside the gas water heater 1 , dew condensation may occur on the surface of the water supply pipe 31 . This condensed water may drip and come into contact with the switching solenoid valve 45 provided at the upper end of the valve unit 41 . A cover body 60 is provided on the valve unit 41 to prevent contact between the switching solenoid valve 45 and water. The cover body 60 is made of transparent resin and has an upper surface portion 60A, a right side portion 60B, and a left side portion 60C. 60 A of upper surface parts are formed in planar view rectangular shape. The right side portion 60B and the left side portion 60C are provided so as to hang down from the entire left and right end portions of the upper surface portion 60A.

Two hole portions 60E are arranged in the vertical direction on each of the right side portion 60B and the left side portion 60C. The hole 60E is formed by a cross-shaped notch. The upper valve body 42B is provided with projections 42C at two locations corresponding to the holes 60E. The projecting portion 42C is formed to have a T-shaped cross section and can be engaged with the corresponding hole portion 60E. By configuring the hole 60E to engage with the protrusion 42C in this manner, the cover body 60 can be easily attached to the upper valve body 42B. Then, the cover member 60 is locked not at the upper surface portion 60A, but at the right side portion 60B and the left side portion 60C. Since the condensed water dripped from the water supply pipe 31 falls onto the upper surface portion 60A of the cover body 60, it is possible to suppress the water dripped onto the cover body 60 from entering inside the upper surface portion 60A. Therefore, the valve unit 41 can effectively suppress contact of water with the switching solenoid valve 45 of the valve unit 41 by the cover body 60 . Further, since the cover body 60 is engaged with the corresponding side surfaces of the upper valve body 42B on both side surfaces of the right side surface portion 60B and the left side surface portion 60C, the cover body 60 is unlikely to come off during normal use. Therefore, the cover body 60 can always prevent water from dripping onto the valve unit 41 .

Since the right side surface portion 60B and the left side surface portion 60C, which are a pair of side surface portions of the cover body 60, are engaged with the upper valve body 42B at a plurality of points, the cover body 60 rotates with respect to the upper valve body 42B. no longer. If the cover body 60 rotates with respect to the upper valve body 42B, the cover body 60 will not be able to sufficiently cover the valve body 42 and the switching electromagnetic valve 45 . In this case, it is conceivable that water drips onto the upper surface of the switching valve chamber 55 and is transmitted to the electromagnetic valve, or water drips directly to the switching electromagnetic valve 45 . Therefore, the effect of the cover body 60 can be ensured by stably supporting the cover body 60 on the upper valve body 42B.

Furthermore, the cover body 60 is made of transparent resin. When assembling or inspecting the gas water heater 1, the positional relationship between the protrusion 42C provided in the upper valve body 42B and the hole 60E provided in the cover body 60 can be easily grasped. Therefore, attachment or detachment of the cover body 60 to or from the valve body 42 is facilitated.

As shown in FIG. 6, the upper surface portion 60A of the cover body 60 is inclined downward toward the right side. Further, as shown in FIG. 7, the upper surface portion 60A of the cover body 60 is inclined downward toward the rear side. Therefore, the cover body 60 can control the flow of water dripped from the water supply pipe 31 and can drip water from a fixed point of the cover body 60 . Therefore, it is possible to prevent the water dripping from the cover body 60 from coming into contact with the electrical equipment (for example, the water amount control motor 35 and the like) arranged below the valve unit 41 .

Further, as shown in FIG. 7, a cover body wall portion 60D is provided at the rear end portion of the upper surface portion 60A of the cover body 60 so as to protrude upward. The cover body wall portion 60D is provided over the entire area in the left-right direction. As a result, dripping of water from the rear end portion of the upper surface portion 60A is suppressed, and the flow of water dripping from the water supply pipe 31 can be further controlled.

FIG. 7 also shows a water supply pipe 31 for reference. The cover body 60 is arranged below the water supply pipe 31 . The cover body 60 covers the upper side of the switching solenoid valve 45 . The length of the cover body 60 in the front-rear direction is determined in consideration of the positional relationship among the water supply pipe 31 , the upper valve body 42</b>B, and the switching solenoid valve 45 .

As described above, the valve unit 41 is provided with the source gas solenoid valve 43 and the proportional valve 44 in addition to the switching solenoid valve 45 . As shown in FIG. 7 , the source gas solenoid valve 43 is arranged below and behind the switching solenoid valve 45 . Water is suppressed from flowing behind the cover body 60 by the cover body wall portion 60D. Since the source gas solenoid valve 43 is provided inside the cover body 60 in the left-right direction, the water dripping from the cover body 60 is unlikely to come into contact with the source gas solenoid valve 43 . Therefore, the cover body 60 can also suppress contact between the source gas electromagnetic valve 43 and water. Also, the proportional valve 44 is arranged on the lower front side of the switching solenoid valve 45 . As shown in FIGS. 6 and 7, the inclination of the upper surface 60A causes the water to flow away from the proportional valve 44. As shown in FIGS. Further, since the proportional valve 44 is provided inside the cover body 60 in the left-right direction, the water dripping from the cover body 60 is unlikely to come into contact with the proportional valve 44 . The cover body 60 can also prevent the proportional valve 44 from coming into contact with water.

As described above, the gas water heater 1 of this embodiment includes the valve unit 41 capable of adjusting the gas flow rate supplied to the burner group 28 . A water supply pipe 31 for passing water is arranged above the valve unit 41 . The valve unit 41 includes a switching valve chamber portion 55 having a switching valve chamber at its upper end, and an upper valve provided with a gas opening 66 provided at a front end portion of the switching valve chamber portion 55 and allowing gas flowing into the switching valve chamber to flow out. The switching valve body 42B and the valve body provided in the switching valve chamber so as to be able to move forward and backward can open and close the gas opening 66, and are fixed to the switching valve chamber portion 55 so as to protrude rearward from the upper valve body 42B. An electromagnetic valve 45 and a cover body 60 detachably fixed to the upper valve body 42B and covering the upper valve body 42B and the switching electromagnetic valve 45 are provided. The cover body 60 includes an upper surface portion 60A that covers the upper valve body 42B and the switching solenoid valve 45 from above, and a right side portion 60B and a left side portion 60C that hang down from left and right peripheral ends of the upper surface portion 60A. A hole portion 60E is provided in each of the right side portion 60B and the left side portion 60C. The upper valve body 42B is provided with a protrusion 42C at a position corresponding to the hole 60E to which the hole 60E engages. Therefore, the valve unit 41 mounted on the gas water heater 1 is attached to the cover body 60 easily and not to come off. Further, since the right side surface 60B and the left side surface 60C of the cover body 60 are engaged instead of the upper surface part 60A, water can be prevented from entering the cover body 60 from the upper side of the valve unit 41. Therefore, in the gas water heater 1 of the present embodiment, even when the valve unit 41 is installed directly under the water supply pipe 31, the cover body 60 can effectively prevent water from contacting the switching solenoid valve 45 of the valve unit 41.

The upper surface portion 60A of the cover body 60 is formed in a rectangular shape in a plan view, and slopes downward toward the rear, downward toward the right, and upward over the entire rear end portion. A protruding cover body wall portion 60D is provided. Therefore, the cover body 60 can control the flow of water dropped from the water supply pipe 31 and can drop from a fixed point of the cover body 60 . Therefore, water dripping from the cover body 60 is suppressed from coming into contact with electrical equipment around the valve unit 41 . Moreover, the cover body 60 can further suppress contact of water with the switching solenoid valve 45 by the cover body wall portion 60D.

At least one of the right side portion 60B and the left side portion 60C is provided with a plurality of the locked portions. As a result, the cover body 60 provided on the valve unit 41 does not rotate with respect to the upper valve body 42B. If the cover body 60 rotates with respect to the upper valve body 42B, the cover body 60 cannot sufficiently cover the upper valve body 42B and the switching solenoid valve 45, and water drips onto the upper surface of the switching valve chamber part 55, causing the solenoid valve to become closed. It is conceivable that the water may be transferred to the valve 45 or the water may drop directly to the switching solenoid valve 45 . Therefore, in the gas water heater 1 of the present embodiment, the effect of the cover body 60 can be ensured by stably supporting the cover body 60 on the upper valve body 42B.

The cover body 60 is made of transparent resin. Therefore, when assembling or inspecting the gas water heater 1, the operator can easily grasp the positional relationship between the projection 42C provided on the upper valve body 42B and the hole 60E provided on the cover body 60. An operator can easily attach or detach the cover body 60 to or from the upper valve body 42B.

In the above description, the water supply pipe 31 is an example of the "water pipe" of the present invention. The gas water heater 1 is an example of the "water heater" of the present invention. The upper valve body 42B is an example of the "gas pipe section" of the present invention. The switching valve chamber portion 55 is an example of the "valve chamber portion" of the present invention. Gas opening 66 is an example of a "gas outlet" in the present invention. The upper valve body 42B and the switching valve chamber portion 55 are examples of the "valve body" of the present invention. The switching solenoid valve 45 is an example of the "solenoid valve" of the present invention. The right side portion 60B and the left side portion 60C are examples of the "side portion". The hole portion 60E is an example of the "locked portion". The projecting portion 42C is an example of the "locking portion". The cover body wall portion 60D is an example of the "wall portion".

The present invention is not limited to the above embodiments, and various modifications are possible. For example, in the above-described embodiment, part of the water supply pipe 31 is arranged directly above the valve unit 41, but any water pipe that may cause condensation may be used. may be placed in Also, both the water supply pipe 31 and the bypass pipe 33 may be arranged directly above the valve unit 41 .

In the above-described embodiment, two holes 60E are provided in each of the right side surface 60B and the left side surface 60C of the cover body 60. It is sufficient if at least one is provided on the side surface. For example, two hole portions 60E may be provided on the right side portion 60B, one hole portion 60E may be provided on the left side portion 60C, and the projection portion 42C may be provided at a position corresponding to the hole portion 60E of the upper valve body 42B.

In the above-described embodiment, the right side portion 60B and the left side portion 60C of the cover body 60 are provided so as to hang down from the entire left and right end portions of the upper surface portion 60A. Just do it.

Further, in the above embodiment, the cover member 60 is made of transparent resin, but at least the peripheral portion of the hole 60E may be made of a transparent member.

Further, in the above-described embodiment, the hole 60E of the cover body 60 is formed as a cross-shaped notch, but it may be formed in another shape such as a circular hole. Further, although the projection 42C of the upper valve body 42B is formed to have a T-shaped cross section, it may have another shape such as a hook shape. Further, the hole 60E is provided in the cover body 60 and the projection 42C is provided in the upper valve body 42B. A hole may be provided in the body 42B.

Further, in the above embodiment, all the protrusions 42C are provided on the upper valve body 42B, but they may be provided on the lower valve body 42A.

31 Water supply pipe 41 Valve unit 42B Upper valve body 42C Protrusion 45 Switching solenoid valve 55 Switching valve chamber 60 Cover body 60A Upper surface 60B Right side 60C Left side 60D Cover body wall 60E Hole 66 Gas opening

Claims (4)

A water heater comprising a valve unit capable of adjusting the flow rate of gas supplied to a burner, and having a water pipe arranged above the valve unit for passing water,
The valve unit is
a gas pipe portion internally provided with a gas passage extending upward; a valve chamber portion internally provided at an upper end portion of the gas pipe portion and communicating with the gas passage; a valve body provided on a side wall portion in a predetermined direction that intersects with the valve chamber, the valve body having a gas outlet that communicates with the valve chamber and allows the gas flowing into the valve chamber to flow out;
a solenoid valve fixed to the valve chamber so as to be able to open and close the gas outlet by means of a valve element provided in the valve chamber so as to be able to advance and retract in the predetermined direction, and protruding in a direction opposite to the gas outlet side; ,
a cover body detachably fixed to the valve body and covering at least the top of the valve body and the solenoid valve;
The cover body
an upper surface portion covering the valve body and the solenoid valve from above;
A pair of side surface portions hanging from a pair of peripheral end portions facing each other in the outer peripheral portion of the upper surface portion,
A locked portion is provided on each of the pair of side portions,
The water heater according to claim 1, wherein the valve body is provided with an engaging portion for engaging the engaging portion at a position corresponding to the engaging portion. The upper surface portion is formed in a rectangular shape in plan view,
It is inclined downward from the first end side, which is the gas outlet side, toward the second end side, which is the electromagnetic valve side, and is perpendicular to the direction in which the first end portion and the second end portion face each other. tilts to one side in the direction of
2. The water heater according to claim 1, wherein the first end portion is provided with a wall portion projecting upward over the entire first end portion. 3. The water heater according to claim 1, wherein at least one of said pair of side surface portions is provided with a plurality of said engaged portions. 4. The water heater according to any one of claims 1 to 3, wherein at least a peripheral portion of said locked portion of said cover body is made of a transparent member.

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