JP2024027774A - Water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water heater which comprises a neutralizer and enables the positional deviation thereof in fore-and-rear directions and a width direction to be highly surely regulated while the neutralizer is attached to a casing main body, and enables the water heater to be attached/detached to/from the casing main body with easy work.

SOLUTION: In a water heater 1, specific means 30 has a first fitting portion 61 and a first engagement portion 62. The first fitting portion 61 protrudes frontward from a connecting base portion 60, or recesses in the connecting base portion 60, and to a back side. The first engagement portion 62 protrudes to one side in an engagement direction from the connecting base portion 60, or recesses in the connecting base portion 60, and to the other side in the engagement direction. A fixture 100 has a second fitting portion 111, a second engagement portion 122 and a deformation portion 121. The second fitting portion 111 can be irregularly fit to the first fitting portion 61. The second engagement portion 122 can be fit to the first engagement portion 62 in a concavo-concave manner. The deformation portion 121 displaces the second engagement portion 122 in the engagement direction by elastic deformation.

SELECTED DRAWING: Figure 5

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to a water heater.

An example of a conventional water heater is disclosed in Patent Document 1. This water heater includes a combustion device, a heat exchanger, a neutralizer, and a housing.

The combustion device produces hot combustion gases. The heat exchanger heats the water passing through it with combustion gas and converts it into hot water. The neutralizer neutralizes drain water generated by condensation of water vapor in the combustion gas.

The housing includes a housing body and a front plate (not shown). The casing body has a rear wall, a top wall, a bottom wall, and a pair of side walls facing each other in the width direction, and has a substantially box-like shape with the front side opened by the casing opening. The front plate covers the housing opening. The housing houses the combustion device, heat exchanger and neutralizer. The neutralizer is mounted on the bottom wall.

The neutralizer has a container and a top lid. As shown in FIG. 2 of Patent Document 1, the upper lid integrally has a fixing piece that projects upward from the rear edge. As shown in FIG. 1 of Patent Document 1, the neutralizer is fastened to the housing body by inserting the screw into the screw hole of the fixing piece and further screwing into the rear wall of the housing body. There is. As a result, the neutralizer is prevented from shifting in the front-back direction, up-down direction, and width direction.

JP2018-31494A

Incidentally, in order to improve the maintainability of water heaters, there is a need for ease of attachment and detachment of neutralizers to and from the housing body.

In this regard, in the conventional water heater described above, the user has to insert his/her hand deep into the casing body to attach/remove the screws, making it difficult to facilitate the operation.

Furthermore, there are water heaters that have a different configuration from the conventional water heaters described above. In this water heater, for example, the identifying means, which is a combustion device or the like housed in the casing while being fixed to the casing main body, and the neutralizer are connected by a fixture. One end of the neutralizer and the fixture are fastened together with a screw, and a part of the identifying means and the other end of the fixture are fastened with a screw. In this case as well, it is difficult to facilitate the work because the direction of attachment and detachment of the screws is not the front-back direction, or the screws are surrounded by the neutralizer, identifying means, and fixtures and are located in a position that is difficult to insert one's hand into.

The present invention has been made in view of the above-mentioned conventional circumstances, and is capable of highly reliably regulating the positional displacement of a neutralizer in the front-rear direction, vertical direction, and width direction while attached to the main body of the casing. The problem to be solved is to provide a water heater that can be easily attached to and detached from a housing body.

The water heater of the present invention includes a combustion device that generates high-temperature combustion gas;
a heat exchanger that heats water passing through the interior with the combustion gas and converts it into hot water;
a neutralizer that neutralizes drain water generated by condensation of water vapor in the combustion gas;
a substantially box-shaped housing body having a rear wall, a top wall, a bottom wall, and a pair of side walls facing each other in the width direction, the front surface of which is open through a housing opening; and a front plate that covers the housing opening. a casing that houses the combustion device, the heat exchanger, and the neutralizer, and in which the neutralizer is placed on the bottom wall;
A water heater comprising:
A fixing device having a neutralizer connecting portion that connects with the neutralizer, and a connected portion that is integral with the neutralizer connecting portion and is located at a position separated from the neutralizer connecting portion;
A specifying means housed in the casing in a state fixed to the casing main body, the specifying means being connected to the connected portion of the fixing device to detect positional deviation of the neutralizer via the fixing device. the specifying means having a connecting base for regulating the
The identifying means includes a first fitting part and a first engaging part formed on the connecting base,
The first fitting portion protrudes forward from the connection base or is recessed rearward within the connection base,
The first engagement portion protrudes from the connection base in one of the engagement directions orthogonal to the front-rear direction, or is recessed within the connection base and in the other engagement direction,
The fixture has a second fitting part, a second engaging part, and a deformable part formed on the connected part,
The second fitting part can be engaged with the first fitting part in a convex-concave manner,
The second engaging portion can engage with the first engaging portion in a concave and convex manner,
The deformable portion is characterized in that it displaces the second engaging portion in the engaging direction by elastic deformation.

In the water heater of the present invention, when the neutralizer is attached to the housing body, the bottom wall on which the neutralizer is placed supports the weight of the neutralizer, and the neutralizer connecting portion of the fixture supports the weight of the neutralizer. Connect with neutralizer. The connecting base of the specifying means and the connected part of the fixing device have a first fitting part and a second fitting part that are concave-convex fitting, and a first engaging part and a second engaging part that are connected to each other. Connection is made by engaging the concave and convex portions.

Specifically, when the first fitting part protrudes, the second fitting part is recessed forward within the connected part. , when the first fitting part is recessed, the second fitting part protrudes rearward from the connected part. The configuration in which the second fitting portion is recessed forward within the connected portion is, for example, a bottomed hole, a through hole, a burred hole, or the like. Specifically, the configuration in which the second engaging part can engage in uneven engagement with the first engaging part means that when the first engaging part protrudes, the second engaging part is located within the connected part and in the engaging direction. When the first engaging portion is recessed, the second engaging portion protrudes from the connected portion in the other direction in the engaging direction. The configuration in which the second engaging portion is recessed within the connected portion and in one direction in the engaging direction is also a bottomed hole, a through hole, a burred hole, or the like.

At this time, the first fitting part and the second fitting part prevent the connected part from shifting in the vertical direction and the width direction with respect to the connecting base. Further, the first engaging portion and the second engaging portion restrict displacement of the connected portion at least in the front-rear direction with respect to the connecting base.

As a result, displacement of the neutralizer in the front-rear direction, up-down direction, and width direction is regulated with high reliability by the connecting base and the fixture.

On the other hand, if the second engaging part is displaced in one direction in the engaging direction and separated from the first engaging part by elastic deformation of the deformable part formed in the connected part, the first engaging part and the second engaging part can be separated from each other. The uneven engagement with the mating portion can be easily released. By sliding the second fitting part forward with respect to the first fitting part, the concave-convex fitting between the first fitting part and the second fitting part can be easily released.

In other words, the water heater of the present invention does not require fastening means such as screws to connect the connecting base of the specific means and the connected part of the fixture, and the connecting base of the specific means and the connected part of the fixture And the connection can be easily released.

As a result, a worker who performs maintenance work on the water heater of the present invention can remove the front plate from the casing body and then remove the neutralizer connecting portion of the fixing device from the connecting base of the specific means while remaining connected to the neutralizer. It is possible to easily release the connection between the fixing device and the connected portion of the fixing device, and take out the neutralizer connected to the fixing device forward from the casing main body. Note that if the neutralizer is not only placed on the bottom wall but also fastened to the bottom wall with screws or the like, the above work is performed after the fastening is released. Furthermore, by performing the reverse operation, the operator can easily attach the neutralizer with the fixture connected to the housing body and place the neutralizer on the bottom wall.

In other words, the operator can install and remove the neutralizer with the fixing device connected to and from the housing body by primarily moving his or her hands in front of the housing body in front of the housing body. .

Therefore, the water heater of the present invention can highly reliably control the displacement of the neutralizer in the front-rear direction, vertical direction, and width direction when it is attached to the casing body, and can also prevent the neutralizer from being attached to and removed from the casing body. Work can be made easier.

The connected portion includes a first portion in which a second fitting portion is formed, and a second portion connected to the first portion and extending rearward, and in which a deformation portion and a second engaging portion are formed. It is desirable that Preferably, the second portion includes a guide portion that is inclined toward the rear and one side of the engagement direction in a portion of the second portion that is located rearward of the second engagement portion.

In this case, when sliding the second fitting part backward from a position in front of the first fitting part to cause the first fitting part and the second fitting part to engage with each other in an uneven manner, the guide part is connected to the connection base. Since the second engaging part can be suitably guided toward the first engaging part while slidingly contacting the second engaging part, the first engaging part and the second engaging part can be engaged with each other with high reliability. Furthermore, the operator can easily separate the second engaging part from the first engaging part by grasping the guide part and elastically deforming the deformable part of the second part in one of the engaging directions. , the uneven engagement between the first engaging portion and the second engaging portion can be more easily released.

It is desirable that the connected portion has a third portion connected to the first portion and extending rearward at a position separated from the second portion in the other direction of engagement. It is desirable that the third portion has an abutting portion that abuts the connection base from the other side in the engagement direction in a state where the first engaging portion and the second engaging portion are engaged with each other. Preferably, the third portion includes a facing guide portion that is inclined rearward and toward the other side of the engagement direction, in a portion of the third portion that is located rearward of the contact portion.

In this case, when sliding the second fitting part backward from a position in front of the first fitting part to cause the first fitting part and the second fitting part to engage with each other in an uneven manner, the guide part and the opposing guide The second engaging part can be suitably guided toward the first engaging part while the second engaging part is located on the outside in the engaging direction with respect to the connecting base and is in sliding contact with the connecting base. The convex-concave engagement with the second engaging portion can be performed with higher reliability. In addition, in a state where the first engaging part and the second engaging part are engaged with each other in a concave and convex manner, the second engaging part in the second part and the contact part in the third part sandwich the connecting base in the engaging direction. Therefore, the second engaging part is difficult to come off from the first engaging part.

It is desirable that the neutralizer has a front wall that partitions a space for neutralizing drain water from the front. The connected portion and the connecting base are preferably located forward of the front wall of the neutralizer.

In this case, when attaching and removing the neutralizer to and from the casing body with the fixtures connected, the worker must be in a position in front of the casing body and must be careful not to move his/her hand back and forth. You can do it in a place close to you without having to stretch your hands too much. As a result, this water heater can realize further improvement in maintainability.

It is desirable that the length of the casing in the front-rear direction is greater than the length of the casing in the width direction. In this case, the water heater of the present invention is a water heater called a narrow installation type water heater or a slim water heater. Further, when the operator attaches and removes the neutralizer to and from the casing body with the fixtures connected, it is difficult for the operator to move the neutralizer in the width direction within the casing. Therefore, this water heater can reliably enjoy the effects of the present invention.

It is desirable that the first fitting part is configured to perform a function other than the function of engaging the second fitting part in a concave-convex manner. Specific examples of other functions include a function to assist in measuring pressure, temperature, or flow velocity related to a combustion device or a heat exchanger, a function to support or position a functional component housed within the housing, and the like. In this case, the number of parts can be reduced compared to the case where the first fitting part only performs the function of engaging the second fitting part in a convex-concave manner.

It is desirable that the identifying means is a combustion device. Desirably, the connection base has a flow path through which fuel gas for generating combustion gas passes. Preferably, the other function is a function that assists in measuring the pressure, temperature, or flow rate within the flow path. With such a specific configuration, the number of parts can be reduced with high certainty.

According to the water heater of the present invention, it is possible to highly reliably control displacement of the neutralizer in the front-rear direction, vertical direction, and width direction while it is attached to the casing body, and it is also possible to prevent the neutralizer from being attached to and removed from the casing body. Work can be made easier.

FIG. 1 is a perspective view of a water heater according to a first embodiment. FIG. 2 is a perspective view of the water heater of Example 1, with the front plate removed. FIG. 3 is a perspective view of the water heater of Embodiment 1, with the front plate removed and the top wall, rear wall, and a pair of side walls shown in chain double-dashed lines; It is a figure showing a heat exchanger, an auxiliary heat exchanger, and a neutralizer. FIG. 4 is a partial perspective view showing the relative relationship among the bottom wall, neutralizer, fixture, and combustion device in the water heater of Example 1. FIG. 5 is a partial perspective view showing the relative relationship among the neutralizer, the fixture, and the combustion device in the water heater of Example 1. FIG. 6 is a partial perspective view showing the relative relationship among the neutralizer, fixture, and combustion device in the water heater of Example 1. FIG. 7 is an exploded perspective view of the neutralizer, fixture, and connection base of the water heater of Example 1. FIG. 8 is a partial sectional view of a fixture and a connecting base in the water heater of Example 1. FIG. 9 is a perspective view of a fixture related to the water heater of Example 2. FIG. 10 is a partial sectional view of a fixture and a connecting base in the water heater of Example 2.

Embodiments 1 and 2 embodying the present invention will be described below with reference to the drawings.

(Example 1)
As shown in FIG. 1, the water heater 1 of Example 1 is an example of a specific embodiment of the water heater of the present invention. In the following description, the front plate 89 side of the casing 8 of the water heater 1, that is, the front side in the paper of FIG. The left side of the water heater 1 is defined as the left side, and the upper side of the paper in FIG. 1 is defined as the upper side of the water heater 1. The front and back, left and right, and up and down directions shown in each figure after FIG. 2 are all shown corresponding to FIG. 1. Hereinafter, the constituent elements of the water heater 1 will be explained.

<Housing>
As shown in FIG. 1, the water heater 1 includes a housing 8. The housing 8 has a housing body 80 and a front plate 89. In this embodiment, the housing body 80 and the front plate 89 are each made of a metal plate such as a steel plate.

The casing body 80 includes a rear wall 81 shown by a two-dot chain line in FIG. 3, an upper wall 82 shown by a solid line in FIG. 2 and a two-dot chain line in FIG. 3, and a bottom wall 83 shown in FIGS. and a pair of side walls 84L, 84R shown in solid lines in FIGS. 1 and 2 and shown in two-dot chain lines in FIG.

As shown in FIG. 2, the housing body 80 has a substantially box-like shape with a housing opening 80H open at the front. In addition, in FIG. 2, illustration of the control section located in front of the neutralizer 50 is omitted.

A pair of side walls 84L and 84R are opposed to each other in the width direction. The width direction of the casing 8 is a direction perpendicular to the front-rear direction and the up-down direction, and in this embodiment, coincides with the left-right direction.

As shown in FIG. 1, the front plate 89 has a substantially rectangular flat plate shape and covers the housing opening 80H. The housing body 80 and the front plate 89 define an internal space of the housing 8.

In this embodiment, the water heater 1 is a water heater called a narrow installation type water heater or a slim water heater, and the length L2 of the housing 8 in the width direction is restricted depending on the narrow installation location in the width direction. ing.

Therefore, it is necessary to secure the volume of the internal space of the casing 8, and the length L1 of the casing 8 in the front-rear direction is larger than the length L2 of the casing 8 in the width direction. The length L3 in the direction is significantly larger than the length L2 of the housing 8 in the width direction. In this example, length L1 is greater than 1.5 times length L2. Length L3 is greater than three times length L2.

A worker who performs maintenance work on the water heater 1 installed in a narrow installation location removes the front plate 89 from the casing body 80 and performs the work while positioned in front of the casing body 80.

<Combustion device>
As shown in FIGS. 2 and 3, the water heater 1 includes a combustion device 30. The combustion device 30 is housed in the casing 8 and is located in the middle of the casing 8 in the vertical direction.

As shown in FIG. 3, the combustion device 30 is approximately box-shaped and includes a combustion chamber (not shown) and a plurality of gas burners inside. As shown in FIG. 2, a combustion fan 30F is connected to the bottom side of the combustion device 30.

As shown in FIGS. 4 to 6, the combustion device 30 has a manifold 35 on its left side. The manifold 35 is formed by combining a manifold main body 36 which is an aluminum casting product and a manifold cover 37 which is a sheet metal machined part.

As shown in FIG. 6, a gas inlet 36A is formed in the center of the lower end of the right side of the manifold body 36 in the front-rear direction so as to protrude downward. A plurality of gas solenoid valves 36V are assembled on the right side of the manifold body 36.

As shown in FIG. 7, a flow path 60C is recessed in the left side surface of the manifold body 36. As shown in FIG. 5, the manifold cover 37 is fastened to the left side of the manifold body 36 and covers the flow path 60C.

Fuel gas that has passed through a gas supply pipe, a source gas solenoid valve, a gas proportional valve, etc. (not shown) is introduced into the gas inlet 36A. The fuel gas is city gas, propane gas, etc. The fuel gas introduced into the gas introduction port 36A passes through the flow path 60C. The flow path 60C branches into a plurality of sections and supplies fuel gas to a plurality of gas burners of the combustion device 30. A plurality of gas electromagnetic valves 36V adjust the supply of fuel gas to each gas burner in the middle of the flow path 60C.

The combustion device 30 generates high-temperature combustion gas by supplying combustion air into the combustion chamber by a combustion fan 30F and combusting the fuel gas discharged from each gas burner.

<Main heat exchanger and auxiliary heat exchanger>
As shown in FIGS. 2 and 3, the water heater 1 includes a main heat exchanger 41 and a sub-heat exchanger 42. The main heat exchanger 41 and the auxiliary heat exchanger 42 are examples of the "heat exchanger" of the present invention.

The main heat exchanger 41 and the auxiliary heat exchanger 42 are housed in the housing 8. The main heat exchanger 41 is located above the combustion device 30. The auxiliary heat exchanger 42 is located above the main heat exchanger 41.

As shown in FIG. 3, the main heat exchanger 41 has a can body 41B. The can body 41B has an open top side and a bottom side. The lower surface side of the can body 41B is connected to the upper surface side of the combustion device 30. Combustion gas generated by the combustion device 30 passes through the inside of the can 41B.

The main heat exchanger 41 has heat transfer tubes and a plurality of heat transfer fins (not shown) inside. The main heat exchanger 41 exchanges heat between the water flowing through the heat transfer tubes and the combustion gas passing through the can body 41B, and absorbs the sensible heat of the combustion gas.

The auxiliary heat exchanger 42 has an outer box 42B. As shown in FIG. 2, an exhaust port 49 is provided at the upper part of the front surface of the outer box 42B. The exhaust port 49 has a substantially cylindrical shape and projects forward. As shown in FIG. 1, the exhaust port 49 passes through a circular opening formed through the upper end of the front plate 89 and is exposed at the front surface of the housing 8.

As shown in FIG. 3, the lower surface side of the outer box 42B is open, and the lower surface side is connected to the upper surface side of the can body 41B of the main heat exchanger 41. The combustion gas that has passed through the can body 41B passes through the inside of the outer box 42B and is then exhausted to the outside of the casing 8 via the exhaust port 49.

The auxiliary heat exchanger 42 includes heat exchanger tubes (not shown). The heat exchanger tube is a meandering corrugated tube including a plurality of straight portions and a plurality of folded portions that are folded back in an arc shape to connect the straight portions.

The auxiliary heat exchanger 42 exchanges heat between the water flowing through the heat transfer tube and the combustion gas passing through the inside of the can body 41B, and absorbs the latent heat of the combustion gas.

As shown in FIG. 1, a water supply port P1, a hot water supply port P2, etc. are held on the lower surface side of the bottom wall 83 of the housing body 80.

As shown in FIG. 2, water supplied from an external water supply source and passed through the water supply port P1 passes through the water flow control unit 45, etc., and is transferred to the heat exchanger tube of the auxiliary heat exchanger 42 via the water supply pipe P1A. Inflow. The water that is being heated and flows out from the heat exchanger tubes of the auxiliary heat exchanger 42 flows into the heat exchanger tubes of the main heat exchanger 41 via the intermediate water supply pipe P1B. Hot water flowing out of the heat transfer tubes of the main heat exchanger 41 reaches the hot water supply port P2 via a hot water supply pipe (not shown).

In this way, the main heat exchanger 41 and the auxiliary heat exchanger 42 heat the water passing through each of them with the combustion gas and convert it into hot water. Then, the water heater 1 supplies hot water to a faucet fitting or the like in the kitchen or bathroom of the residence where the water heater 1 is installed via the hot water supply port P2.

<Configuration in which the combustion device, main heat exchanger, and auxiliary heat exchanger are fixed to the housing body>
As shown in FIG. 3, by connecting the combustion device 30, the can body 41B of the main heat exchanger 41, and the outer box 42B of the auxiliary heat exchanger 42, the combustion device 30, the main heat exchanger 41 and the auxiliary heat exchanger 42 constitute one assembled structure.

A fixing fitting 93A is fastened to the bottom surface of the combustion device 30. The fixing fitting 93A is bent below the rear surface of the combustion device 30 and extends downward. A fixing fitting 93B is fastened to a downwardly extending portion of the fixing fitting 93A.

The fixing metal fitting 93B is bent into an inverted U shape when viewed from the front and back direction, and protrudes rearward. A plurality of bent pieces along the rear wall 81 are formed at the rear end of the fixture 93B. A plurality of bent pieces of the fixture 93B are fastened to the rear wall 81.

A fixture 91 is fastened to a portion of the upper surface of the outer box 42B of the auxiliary heat exchanger 42 near the exhaust port 49. The fixture 91 is bent into an inverted U shape when viewed from the left and right. The upper portion of the fixture 91 extends in the left-right direction along the upper wall 82. The upper portion of the fixture 91 is fastened to the upper wall 82.

A fixing fitting 92 is fastened to the rear surface of the outer box 42B of the auxiliary heat exchanger 42. The fixing fitting 92 is a substantially rectangular plate and extends in the left-right direction along the rear wall 81. The fixture 92 is fastened to the rear wall 81.

In this way, the combustion device 30, the main heat exchanger 41, and the auxiliary heat exchanger 42 are housed in the housing 8 while being fixed to the rear wall 81 and the upper wall 82 of the housing body 80.

<Neutralizer>
As shown in FIGS. 2 to 4, the water heater 1 includes a neutralizer 50. The neutralizer 50 is housed in the housing 8 and is located below the combustion device 30. The neutralizer 50 is placed directly on the bottom wall 83. The neutralizer 50 has a neutralizer main body 51 and a lid 52.

As shown in FIG. 4, the neutralizer main body 51 is a generally box-shaped resin molded product with an open top surface and a space inside for neutralizing drain water. The neutralizer main body 51 has a front wall 59. The front wall 59 defines a space for neutralizing drain water from the front.

The lid body 52 is a resin molded product that has a substantially flat plate shape and has a box-shaped bulge portion 53 formed in a portion thereof. The outer periphery of the lid body 52 is joined to the periphery of the upper end of the neutralizer main body 51 and covers the neutralizer main body 51, thereby dividing a space for neutralizing drain water from above. The box-shaped bulging portion 53 has a substantially box shape and bulges upward from the rear portion of the lid body 52 .

The lid body 52 has an overflow water inlet 54A and a drain water inlet 54B. The overflow water inlet 54A has a cylindrical shape and projects upward from the front portion of the lid 52. The drain water inlet 54B has a cylindrical shape and projects upward from the upper surface of the box-shaped bulge 53 of the lid 52.

The overflow water inlet 54A is connected to an overflow water outlet of a cistern (not shown) via an overflow water pipe (not shown). A cistern is a container that stores circulating water in a heating circuit. The drain water inlet 54B is connected to a drain water outlet (not shown) of the auxiliary heat exchanger 42 via a drain water pipe (not shown).

As shown in FIGS. 1 and 4, a drain water discharge port P3 is fastened to the lower surface side of the bottom wall 83 of the housing body 80 with a screw. A drain water outlet (not shown) is formed in the bottom wall of the neutralizer main body 51 so as to project downward. The drain water outlet of the neutralizer main body 51 passes through an unillustrated insertion hole in the bottom wall 83 and is inserted into the drain water outlet port P3.

As shown in FIG. 4, the neutralizer main body 51 has a connection port 54C for opening to the atmosphere. The atmosphere opening connection port 54C has a cylindrical shape and projects forward from the lower end of the front wall 59. As shown in FIG. 1, the drain side of the neutralizer 50 is connected to an atmosphere release valve (not shown) via an atmosphere release connection port 54C and a connection pipe P4.

Drain water generated by condensation of water vapor in the combustion gas in the auxiliary heat exchanger 42 is introduced into the neutralizer 50 via a drain water pipe (not shown) and a drain water inlet 54B. The neutralizer 50 neutralizes the drain water and discharges it to the outside of the housing 8 via the drain water outlet and the drain water outlet port P3.

<Configuration in which the bottom wall side of the neutralizer is fixed to the housing body>
As shown in FIG. 3, the right wall of the neutralizer main body 51 is recessed to the left in a plurality of steps at the rear portion relative to the front portion in order to avoid interference with surrounding members.

As shown in FIGS. 3 and 4, a fixed piece 51A is formed at a corner located forward and downward on the right wall of the neutralizer main body 51 so as to protrude to the right. A screw insertion hole (not shown) is provided in the fixed piece 51A in the front-rear direction.

A fixing piece 83A is formed on the bottom wall 83 of the casing body 80, with a portion located rearward of the fixed piece 51A being cut upward.

With the neutralizer 50 placed on the bottom wall 83 of the housing body 80, the fixed piece 51A abuts the fixed piece 83A from the front. In this state, a screw is inserted from the front into the screw insertion hole of the fixed piece 51A, and then screwed into the fixed piece 83A, thereby fixing the bottom wall side of the neutralizer 50 to the bottom wall 83 of the housing body 80. There is.

Although not shown, the insertion hole in the bottom wall 83 through which the drain water outlet of the neutralizer main body 51 passes has a gap of about ten-odd millimeters with respect to the outer peripheral surface of the drain water outlet.

Remove the screws that fasten the fixed piece 51A to the fixed piece 83A, and also remove the screws that fasten the drain water discharge port P3 to the bottom wall 83, and drain water from the drain water outlet of the neutralizer main body 51 and the bottom wall 83. By separating the discharge port P3, the bottom wall side of the neutralizer 50 can slide forward about ten-odd mm with respect to the bottom wall 83 of the housing body 80.

<Configuration in which part of the combustion device restricts the positional shift of the neutralizer>
The combustion device 30 housed in the casing 8 while being fixed to the casing main body 80 is an example of the "identification means" of the present invention. As shown in FIGS. 6 to 8, the manifold body 36 of the combustion device 30 has a connecting base 60. As shown in FIGS.

As described below, the connection base 60 restricts the displacement of the neutralizer 50 via the fixture 100 by being connected to a connected portion 106 of the fixture 100, which will be described later.

The connection base 60 is a portion located at the front and lower part of the manifold body 36. As shown in FIG. 6, the connection base 60 is located forward of the front wall 59 of the neutralizer 50.

As shown in FIG. 7, the connection base 60 has a front end portion of a flow path 60C. Further, the connection base 60 has a portion located below the front end portion of the flow path 60C that bulges downward, and the bulge portion 60B has a column 60A that protrudes to the left. The manifold main body 36 of the combustion device 30 has a first fitting part 61 and a first engaging part 62 formed in the connection base 60.

The first fitting portion 61 is a cylinder that projects forward from the front edge of the connection base 60 . The outer peripheral edge of the front surface of the first fitting portion 61 is chamfered.

In this embodiment, the protruding length of the first fitting part 61 is about 13 mm, and the outer diameter of the first fitting part 61 is about 12 mm. In this embodiment, the center of the first fitting portion 61 extends horizontally in the front-rear direction.

The first fitting portion 61 has a screw hole 61A and a pressure measurement pore 61B formed along its center. The screw hole 61A extends rearward from the front surface of the first fitting portion 61. The front end of the pressure measurement pore 61B is connected to the rear end of the screw hole 61A. The rear end of the pressure measurement pore 61B is connected to the front end portion of the flow path 60C.

Normally, the pressure measurement pore 61B is closed by screwing the seal screw 61S into the screw hole 61A. A worker who performs maintenance work on the water heater 1 can measure the pressure in the flow path 60C by removing the seal screw 61S from the screw hole 61A and screwing the connecting end of the pressure measuring device into the screw hole 61A.

In other words, the first fitting portion 61 is configured to perform a function of assisting the measurement of the pressure within the flow path 60C. The function of assisting the measurement of the pressure in the flow path 60C is an example of "a function different from the function of fitting the second fitting part with the convexes and convexes" of the present invention.

As shown in FIGS. 7 and 8, the first engaging portion 62 is a round hole that is recessed from the left side of the cylinder 60A into the bulging portion 60B of the connecting base 60 and to the right, and further passes through the bulging portion 60B. . The first engaging portion 62 is chamfered on the left side of the cylinder 60A.

In this embodiment, the inner diameter of the first engaging portion 62 is approximately 3.5 mm, and the chamfering process is approximately 0.5 mm. In this embodiment, the center of the first engaging portion 62 extends horizontally in the left-right direction.

The left-right direction is an example of the "engaging direction perpendicular to the front-back direction" of the present invention. The left side in the left-right direction is an example of "one side of the engagement direction" of the present invention. The right side in the left-right direction is an example of "the other side of the engagement direction" of the present invention.

As shown in FIGS. 5 and 7, the neutralizer 50 has a convex portion 55 to be connected. The convex portion 55 to be connected is a plate-shaped piece that protrudes upward from the front and right corner of the upper surface of the box-shaped bulging portion 53 and extends in the front-rear direction.

As shown in FIG. 7, reinforcing ribs 55A and 55B are connected to the front and rear edges of the connected convex portion 55 from the left. A screw insertion hole 55H is provided in the upper end of the connected convex portion 55 in the left-right direction.

As shown in FIGS. 5 to 8, the water heater 1 further includes a fixture 100. The fixture 100 is formed by punching, burring, bending, etc. a metal plate material such as a steel plate.

As shown in FIG. 7, the fixture 100 includes a neutralizer connecting portion 105, an intermediate portion 101, and a connected portion 106.

The neutralizer connecting portion 105 has a rectangular flat plate shape extending in the up-down direction and the front-back direction. A screw hole 105H is formed in the upper portion of the neutralizer connecting portion 105. The screw hole 105H is formed by burring the center of the upper portion of the neutralizer connecting portion 105 and forming a female thread on the inner periphery of a cylinder that protrudes shortly to the right.

The neutralizer connecting portion 105 has an abutment piece 105A. The contact piece 105A is a plate-shaped piece that is bent leftward from a portion of the front end edge of the neutralizer connecting portion 105 located below the screw hole 105H and extends in the vertical direction.

The intermediate portion 101 is connected to the upper edge of the neutralizer connecting portion 105 and has a rectangular flat plate shape extending in the up-down direction and the front-back direction. The neutralizer connecting portion 105 and the intermediate portion 101 are L-shaped when viewed from the left and right direction. The length of the intermediate portion 101 in the front-rear direction is significantly larger than the length of the intermediate portion 101 in the vertical direction and the length of the neutralizer connecting portion 105 in the vertical direction.

The connected portion 106 has a first portion 110, a second portion 120, and a third portion 130.

The first portion 110 is T-shaped when viewed from the front and rear directions. The second portion 120 connects to the left edge of the lower portion of the first portion 110, which is narrower than the upper portion, and extends rearward. The third portion 130 is connected to the right edge of the lower portion of the first portion 110, in other words, the third portion 130 is connected to the first portion 110 at a position spaced to the right from the second portion 120, and extends rearward. .

The connected portion 106 is integrated with the neutralizer connecting portion 105 via the intermediate portion 101 by connecting the left edge of the first portion 110 to the front edge of the intermediate portion 101 . The connected portion 106 is located away from the neutralizer connecting portion 105 forward.

A reinforcing protrusion 101C is formed in the intermediate portion 101. The reinforcing protrusion 101C is recessed to the right and extends in the front-rear direction from a portion located above the screw hole 105H to the front edge of the intermediate portion 101, thereby reinforcing the intermediate portion 101.

A reinforcing protrusion 110C is formed on the left side of the upper portion of the first portion 110. The reinforcing protrusion 110C is recessed rearward and extends in the left-right direction to the left end edge of the first portion 110, thereby reinforcing the first portion 110.

By connecting the front end of the reinforcing protrusion 101C and the left end of the reinforcing protrusion 110C, the connection between the intermediate portion 101 and the first portion 110 is reinforced.

As shown in FIG. 5, with the neutralizer connecting portion 105 abutting the connected convex portion 55 of the neutralizer 50 from the right, the screw 105S is inserted into the screw insertion hole 55H of the connected convex portion 55 from the left. By being inserted and further screwed into the screw hole 105H of the neutralizer connecting portion 105, the neutralizer connecting portion 105 is connected to the connected convex portion 55 of the neutralizer 50.

In this state, the contact piece 105A of the neutralizer connecting portion 105 contacts the reinforcing rib 55A from the front. Thereby, the contact piece 105A restricts the rotation of the fixture 100 around the screw 105S that would move the connected portion 106 downward, while allowing rotation in the opposite direction.

As shown in FIG. 7, the fixture 100 includes a second fitting portion 111, a deformable portion 121, and a second engaging portion 122 formed on the connected portion 106.

The second fitting part 111 is formed on the right side of the upper part of the first part 110. The second fitting part 111 is a cylinder formed by burring a part of the first part 110 so as to protrude shortly forward. The inner diameter of the second fitting part 111 is such that the second fitting part 111 can be fitted into the first fitting part 61 and the second fitting part 111 can be slid in the front and back direction with respect to the first fitting part 61. is set to a certain size.

That is, the second fitting portion 111 is recessed forward within the first portion 110 of the connected portion 106 so as to align with the first fitting portion 61 protruding forward, and further penetrates the first portion 110. There is. As shown in FIGS. 5, 6, and 8, the second fitting portion 111 can be fitted with the first fitting portion 61 in a concave-convex manner.

The first fitting portion 61 and the second fitting portion 111 that fit into the concave and convex portions prevent the connected portion 106 from shifting in the vertical direction and the width direction with respect to the connecting base 60 .

As shown in FIG. 6, the connected portion 106 is located forward of the front wall 59 of the neutralizer 50 in a state where the first fitting portion 61 and the second fitting portion 111 are engaged with each other. There is.

As shown in FIGS. 7 and 8, the deformable portion 121 and the second engaging portion 122 are formed in the second portion 120. As shown in FIGS.

The deformable portion 121 has a rectangular flat plate shape extending in the front-rear direction and the up-down direction, and constitutes the front portion of the second portion 120 . The front edge of the deformed portion 121 is connected to the left edge of the lower portion of the first portion 110 .

The second engaging portion 122 is a convex portion that is formed by pressing the center of the deformable portion 121 and protrudes briefly to the right. The right-facing surface of the second engaging portion 122 is curved like a part of a spherical surface. The size of the second engaging portion 122 is set to a size that allows the second engaging portion 122 to engage with the first engaging portion 62 .

Specifically, as shown in FIG. 8, the outer circumferential surface of the second engaging part 122 can come into contact with the chamfered slope of the first engaging part 62. In this state, the apex of the second engaging portion 122 is located at the center of the first engaging portion 62 and enters the space surrounded by the cylindrical inner peripheral surface of the first engaging portion 62 .

That is, the second engaging portion 122 protrudes to the right from the deformed portion 121 of the second portion 120 of the connected portion 106 so as to align with the first engaging portion 62 recessed to the right. The second engaging portion 122 can engage with the first engaging portion 62 in a concave and convex manner.

The first engaging portion 62 and the second engaging portion 122 that engage with each other in a concave-convex manner prevent the connected portion 106 from shifting at least in the front-rear direction with respect to the connecting base 60 .

The deformable portion 121 is elastic so that the rear end edge is displaced leftward or rightward with respect to the front end edge. The deformable portion 121 displaces the second engaging portion 122 in the left-right direction by elastic deformation.

As shown in FIGS. 7 and 8, the second portion 120 has a guide portion 125. As shown in FIGS. The guide portion 125 is a rectangular plate-shaped portion of the second portion 120 located rearward of the deformable portion 121 and the second engaging portion 122 . The front edge of the guide portion 125 is connected to the rear edge of the deformable portion 121. The guide portion 125 is inclined rearward and to the left.

By grasping the guide part 125 and moving it to the left, the operator can elastically deform the deforming part 121 so that the rear end edge is displaced leftward with respect to the front end edge. If the second engaging part 122 is displaced to the left and separated from the first engaging part 62 by such elastic deformation of the deforming part 121, the relationship between the first engaging part 62 and the second engaging part 122 is reduced. The uneven engagement can be easily released.

As shown in FIGS. 6 and 8, the third portion 130 has an abutting portion 133 and an opposing guide portion 135. As shown in FIGS.

The contact portion 133 has a rectangular flat plate shape extending in the front-rear direction and the up-down direction, and constitutes the front portion of the third portion 130 . The front edge of the contact portion 133 is connected to the right edge of the lower portion of the first portion 110 .

The contact portion 133 is in a state where the first engaging portion 62 and the second engaging portion 122 are engaged with each other in a concave and convex manner.
It abuts the right side of the bulging portion 60B of the connection base 60 from the right. In other words, the contact portion 133 and the second engaging portion 122 sandwich the bulged portion 60B.

The opposing guide portion 135 is a rectangular plate-shaped portion of the third portion 130 located rearward of the contact portion 133 . The front edge of the opposing guide portion 135 is connected to the rear edge of the contact portion 133. The opposing guide portion 135 is inclined rearward and to the right.

The guide portion 125 and the opposing guide portion 135 face each other in the left-right direction, and are inclined such that the distance between their rear edges is greater than the distance between their front edges.

As a result, when sliding the second fitting part 111 backward from a position in front of the first fitting part 61 to cause the first fitting part 61 and the second fitting part 111 to engage with each other in a concave and convex manner, the guide The second engaging portion 122 is connected to the first engaging portion 62 while the portion 125 and the opposing guide portion 135 are located outside in the left-right direction with respect to the bulging portion 60B of the connection base 60 and slidingly contact the bulging portion 60B. We can provide suitable guidance towards this.

At this time, when the second engaging portion 122 rides on the left side of the cylinder 60A of the bulging portion 60B, the deformable portion 121 is elastically deformed and stores a restoring force, and the second engaging portion 122 is attached to the first engaging portion 62. By releasing the restoring force when the engagement starts, the first engaging portion 62 and the second engaging portion 122 can be engaged with each other with high reliability.

<Effect>
In the water heater 1 of Example 1, with the neutralizer 50 attached to the housing body 80, the bottom wall 83 on which the neutralizer 50 is placed supports the weight of the neutralizer 50, and the fixing device The neutralizer connecting portion 105 of the neutralizer 50 is connected to the connected convex portion 55 of the neutralizer 50 .

The connecting base 60 of the manifold main body 36 of the combustion device 30 and the connected part 106 of the fixture 100 have a first fitting part 61 and a second fitting part 111 that are fitted in a concave and convex manner, and also have a first engagement. The mating portion 62 and the second engaging portion 122 are connected by engaging with each other in a concave and convex manner.

At this time, the first fitting part 61 and the second fitting part 111 prevent the connected part 106 from shifting in the vertical direction and the width direction with respect to the connecting base 60. Further, the first engaging portion 62 and the second engaging portion 122 prevent the connected portion 106 from shifting at least in the front-rear direction with respect to the connecting base 60.

As a result, displacement of the neutralizer 50 in the front-back direction, up-down direction, and width direction is regulated with high reliability by the connection base 60 and the fixture 100.

On the other hand, if the second engaging part 122 is displaced to the left and separated from the first engaging part 62 by elastic deformation of the deformable part 121 formed in the connected part 106, the first engaging part 62 and the second engaging part 122 are separated from each other. The uneven engagement with the second engaging portion 122 can be easily released. By sliding the second fitting part 111 forward about 10 mm with respect to the first fitting part 61, the uneven fitting between the first fitting part 61 and the second fitting part 111 can be easily performed. Can be canceled.

In other words, this water heater 1 does not require fastening means such as screws to connect the connection base 60 and the connected part 106 of the fixture 100, and the connection between the connection base 60 and the connected part 106 of the fixture 100 and The connection can be easily released.

As a result, a worker performing maintenance work on the water heater 1 can easily take out the neutralizer 50 with the fixture 100 connected to the front from the housing body 80, as described below. .

First, as shown in FIG. 2, the operator removes the front plate 89 from the casing body 80, and introduces the control section located in front of the neutralizer 50, the connecting pipe P4, and the overflow water of the neutralizer 50. Remove the two pipes connected to the port 54A and the drain water inlet 54B, respectively.

Then, as shown in FIG. 4, the operator removes the screw that fastens the fixed piece 51A of the neutralizer 50 to the fixed piece 83A of the bottom wall 83, and also connects the drain water discharge port P3 to the neutralizer main body 51. It is separated from the drain water outlet and the bottom wall 83. Thereby, the bottom wall side of the neutralizer 50 can be slid forward by about ten or more mm with respect to the bottom wall 83 of the housing body 80.

Next, the operator grasps the guide portion 125 to elastically deform the deformable portion 121 to the left, thereby releasing the uneven engagement between the first engaging portion 62 and the second engaging portion 122. Then, the operator slides the bottom wall side of the neutralizer 50 forward against the bottom wall 83 of the housing body 80, or moves the neutralizer 50 so that the lid 52 side of the neutralizer 50 moves forward. 50, the second fitting part 111 of the fixture 100 is slid forward with respect to the first fitting part 61, and the connection between the first fitting part 61 and the second fitting part 111 is Release the uneven fitting.

In this way, the operator connects the connecting base 60 and the connected part 105 of the fixture 100 while the neutralizer connecting part 105 of the fixture 100 remains connected to the connected convex part 55 of the neutralizer 50 by fastening the screw 105S. The connection can be easily released. Then, the operator can easily lift the neutralizer 50 connected to the fixture 100 a little and take it out forward from the housing body 80.

In addition, the operator can easily attach the neutralizer 50 with the fixture 100 connected to the housing body 80 and place the neutralizer 50 on the bottom wall 83 by performing the reverse operation. .

In other words, the operator positions the neutralizer 50 with the fixture 100 connected to the housing body 80 and attaches it to the housing body 80 in a state where the fixture 100 is connected, by mainly moving the hand in the front and back directions while standing in front of the housing body 80. Can be removed.

Therefore, the water heater 1 of the first embodiment can highly reliably regulate the positional deviation of the neutralizer 50 in the front-rear direction, vertical direction, and width direction when it is attached to the casing main body 80. It is possible to simplify the installation and removal work.

In addition, in this water heater 1, as shown in FIG. 7, the connected portion 106 is connected to the first portion 110 in which the second fitting portion 111 is formed, and extends rearward to be deformed. and a second portion 120 in which a portion 121 and a second engaging portion 122 are formed. The second portion 120 has a guide portion 125 that slopes rearward and leftward in a portion of the second portion 120 that is located rearward of the second engaging portion 122 . With this configuration, when sliding the second fitting part 111 backward from a position in front of the first fitting part 61 to cause the first fitting part 61 and the second fitting part 111 to engage with each other in a concave-convex manner, Since the guide portion 125 can suitably guide the second engaging portion 122 toward the first engaging portion 62 while slidingly contacting the left surface of the cylinder 60A in the bulging portion 60B of the connection base 60, the first engaging portion 62 and the second engaging portion 122 can be engaged with each other with high reliability. Further, the operator can easily separate the second engaging portion 122 from the first engaging portion 62 by grasping the guide portion 125 and elastically deforming the deformable portion 121 of the second portion 120 to the left. Therefore, the uneven engagement between the first engaging portion 62 and the second engaging portion 122 can be released more easily.

Furthermore, in this water heater 1, the connected portion 106 has a third portion 130 that connects to the first portion 110 at a position separated to the right from the second portion 120 and extends rearward. The third portion 130 has an abutting portion 133 that abuts the bulging portion 60B of the connecting base 60 from the right in a state where the first engaging portion 62 and the second engaging portion 122 are engaged with each other. There is. The third portion 130 has a facing guide portion 135 that is inclined rearward and rightward in a portion of the third portion 130 that is located rearward of the contact portion 133. With this configuration, when sliding the second fitting part 111 backward from a position in front of the first fitting part 61 to cause the first fitting part 61 and the second fitting part 111 to engage with each other in a concave-convex manner, The guide portion 125 and the opposing guide portion 135 are located on the outside in the left-right direction with respect to the bulge portion 60B of the connection base 60, and while slidingly contacting the bulge portion 60B, the second engaging portion 122 is connected to the first engaging portion. 62, the first engaging portion 62 and the second engaging portion 122 can be engaged with each other more reliably. In addition, since the second engaging portion 122 and the contact portion 133 sandwich the connecting base 60 in the left-right direction in a state where the first engaging portion 62 and the second engaging portion 122 engage with each other in a concave-convex manner, the second engaging portion 62 and the second engaging portion 122 are The engaging portion 122 is difficult to separate from the first engaging portion 62.

Further, in this water heater 1, as shown in FIG. 6, the connected portion 106 and the connecting base 60 are located forward of the front wall 59 of the neutralizer 50. With this configuration, when attaching and removing the neutralizer 50 connected to the fixing tool 100 to and from the housing body 80, the operator is positioned in front of the housing body 80 and can move his or her hands in the front-rear direction. Movements can be performed mainly in places close to oneself without having to stretch one's arms too much. As a result, this water heater 1 can realize further improvement in maintainability.

Furthermore, in this water heater 1, as shown in FIG. 1, the length L1 of the housing 8 in the front-rear direction is larger than the length L2 of the housing 8 in the width direction. In other words, this water heater 1 is a water heater called a narrow installation type water heater or a slim water heater. Further, when the operator attaches and removes the neutralizer 50 with the fixture 100 connected to and from the housing body 80, it is difficult for the operator to move the neutralizer 50 in the width direction within the housing 8. Therefore, this water heater 1 can reliably enjoy the effects of the present invention.

In addition, in this water heater 1, as shown in FIG. 7, the first fitting part 61 is configured to perform a function other than the function of engaging the second fitting part 111 in a concave-convex manner. Another function is to assist in measuring the pressure within the flow path 60C recessed in the manifold body 36 of the combustion device 30. With this configuration, the number of parts can be reduced with high reliability compared to a case where the first fitting part 61 only functions to engage the second fitting part 111 in a concave-convex manner.

(Example 2)
As shown in FIGS. 9 and 10, in the water heater of Example 2, the fixture 100 according to Example 1 is modified to include a connected portion 206 instead of the connected portion 106.

Further, as shown in FIG. 10, in this water heater, in the manifold main body 36 according to the first embodiment, a first fitting portion 61 and a first engaging portion 62 are formed in the connecting base portion 60. It has been modified to include a fitting part 261 and a first engaging part 262. Note that the first fitting portion 61 is left for the purpose of assisting the measurement of the pressure within the flow path 60C.

The other configurations of the second embodiment are the same as those of the first embodiment. Therefore, the same components as those in the first embodiment are given the same reference numerals, and the description thereof will be omitted or simplified.

The first fitting part 261 is a bottomed round hole that is recessed into the connection base 60 and rearward from the front surface of the connection base 60 located below the first fitting part 61 . The opening edge of the first fitting portion 261 is chamfered. The center of the first fitting part 261 extends horizontally in the front-rear direction.

The first engaging portion 262 is a convex portion that protrudes leftward from the left surface of the bulging portion 60B of the connection base 60. The left-facing surface of the first engaging portion 262 is curved like a part of a spherical surface.

As shown in FIG. 9, in the connected portion 206 of the fixture 100, the first portion 110 has the right side of the upper portion where the second fitting portion 111 according to the first embodiment is formed removed. A second portion 120 is connected to the left edge of the lower portion of the first portion 110 . A third portion 130 is connected to the right edge of the lower portion of the first portion 110 . The fixture 100 has a second fitting part 211 formed in the connected part 206 instead of the second fitting part 111 according to the first embodiment. The second fitting portion 211 is formed at the center of the lower portion of the first portion 110.

The second fitting portion 211 is a cylinder formed by burring a portion of the first portion 110 so as to protrude rearward. As shown in FIG. 10, the outer diameter of the second fitting part 211 is such that the second fitting part 211 can fit into the first fitting part 261, and the second fitting part 211 can fit into the first fitting part 261. The size is set so that it can be slid forward and backward.

That is, the second fitting portion 211 projects rearward from the first portion 110 of the connected portion 206 so as to align with the first fitting portion 261 recessed rearward. The second fitting portion 211 can fit into the first fitting portion 261 in a convex-concave manner.

The first fitting portion 261 and the second fitting portion 211 that fit into the concave and convex portions prevent the connected portion 206 from shifting in the vertical direction and the width direction with respect to the connecting base 60 .

As shown in FIGS. 9 and 10, the fixture 100 has a second engaging portion 222 formed on the connected portion 206 instead of the second engaging portion 122 according to the first embodiment. The second engaging portion 222 is formed in the second portion 120.

The second engaging portion 222 is a cylinder formed by burring the center of the deforming portion 121 so as to protrude briefly to the left. The size of the second engaging portion 222 is set to a size that allows the second engaging portion 222 to engage with the first engaging portion 262.

That is, the second engaging portion 222 is recessed to the left within the deformed portion 121 of the second portion 120 of the connected portion 206 so as to align with the first engaging portion 262 protruding leftward, and further It passes through 121. The second engaging portion 222 can engage with the first engaging portion 262 in a concave-convex manner.

The first engaging portion 262 and the second engaging portion 222 that engage with each other in a concave-convex manner prevent the connected portion 206 from shifting at least in the front-rear direction with respect to the connecting base 60 .

The water heater of the second embodiment having such a configuration, like the water heater 1 of the first embodiment, has a neutralizer 50 that is attached to the main body 80 of the casing in the front-back direction, up-down direction, and width direction. Positional displacement can be regulated with high reliability, and the work of attaching to and detaching from the housing body 80 can be facilitated.

In the above, the present invention has been explained based on Examples 1 and 2, but the present invention is not limited to the above-mentioned Examples 1 and 2, and can be applied with appropriate changes without departing from the spirit thereof. Needless to say.

In Examples 1 and 2, the centers of the first fitting portions 61 and 261 extend horizontally in the front-rear direction, but the present invention is not limited to this configuration. For example, the center of the first fitting portion may extend in the front-rear direction while being slightly inclined with respect to the horizontal.

In Examples 1 and 2, the engaging direction is the left-right direction (width direction), but the present invention is not limited to this configuration. For example, the engagement direction may be an up-down direction. Further, the engagement direction may be a direction that is perpendicular to the front-rear direction and inclined with respect to the up-down direction and the left-right direction.

In Examples 1 and 2, the identifying means is the combustion device 30, but the present invention is not limited to this configuration. For example, the identifying means may be a heat exchanger, or may be a device or member different from the combustion device, the heat exchanger, and the neutralizer.

In Examples 1 and 2, the neutralizer 50 is placed directly on the bottom wall 83, but the present invention is not limited to this configuration. For example, the neutralizer may be indirectly placed on the bottom wall by being supported from below by a pedestal assembled to the top side of the bottom wall of the housing body.

In Examples 1 and 2, the connected parts 106 and 206 are integrated with the neutralizer connecting part 105 by bending a metal plate or the like, but the present invention is not limited to this configuration. For example, the connected portion may be integrated with the neutralizer connecting portion by fastening or welding a plurality of members.

In Examples 1 and 2, the fixture 100 is made of metal, but the present invention is not limited to this configuration. For example, the fixture may be made of resin or fiber reinforced resin.

The present invention can be used, for example, in a water heater that only has a hot water supply function, a water heater that has a hot water supply function and a bath reheating function, a hot water heater that has a hot water supply function and a function that circulates hot water between it and a heating device, etc. It is possible.

1... Water heater 30... Combustion device (specific means)
41, 42... Heat exchanger (41... Main heat exchanger, 42... Sub-heat exchanger)
50... Neutralizer 81... Rear wall 82... Top wall 83... Bottom wall 84L, 84R... Pair of side walls 80... Housing body 80H... Housing opening 89... Front plate 8... Housing 105... Neutralizer connection part 106 , 206... Connected part 100... Fixture 60... Connection base 61, 261... First fitting part 62, 262... First engaging part 111, 211... Second fitting part 122, 222... Second engaging part 121...Deformation part 110...First part 120...Second part 125...Guiding part 130...Third part 133...Abutting part 135...Opposing guide part 59...Front wall L1...Length of the housing in the front-rear direction L2...Casing Length in the width direction of the body 60C...Channel

Claims (7)

a combustion device that generates high-temperature combustion gas;
a heat exchanger that heats water passing through the interior with the combustion gas and converts it into hot water;
a neutralizer that neutralizes drain water generated by condensation of water vapor in the combustion gas;
a substantially box-shaped housing body having a rear wall, a top wall, a bottom wall, and a pair of side walls facing each other in the width direction, the front surface of which is open through a housing opening; and a front plate that covers the housing opening. a casing that houses the combustion device, the heat exchanger, and the neutralizer, and in which the neutralizer is placed on the bottom wall;
A water heater comprising:
A fixing device having a neutralizer connecting portion that connects with the neutralizer, and a connected portion that is integral with the neutralizer connecting portion and is located at a position separated from the neutralizer connecting portion;
A specifying means housed in the casing in a state fixed to the casing main body, the specifying means being connected to the connected portion of the fixing device to detect positional deviation of the neutralizer via the fixing device. the specifying means having a connecting base for regulating the
The identifying means includes a first fitting part and a first engaging part formed on the connecting base,
The first fitting portion protrudes forward from the connection base or is recessed rearward within the connection base,
The first engagement portion protrudes from the connection base in one of the engagement directions orthogonal to the front-rear direction, or is recessed within the connection base and in the other engagement direction,
The fixture has a second fitting part, a second engaging part, and a deformable part formed on the connected part,
The second fitting part can be engaged with the first fitting part in a convex-concave manner,
The second engaging portion can engage with the first engaging portion in a concave and convex manner,
The water heater is characterized in that the deformable portion displaces the second engaging portion in the engaging direction by elastic deformation. The connected portion includes a first portion in which the second fitting portion is formed;
a second portion connected to the first portion and extending rearward, in which the deformation portion and the second engaging portion are formed;
2. The second portion has a guide portion located rearward of the second engaging portion in the second portion and inclined toward the one side of the engaging direction. Water heater. The connected portion has a third portion connected to the first portion and extending rearward at a position separated from the second portion in the other direction in the engagement direction,
The third portion has a contact portion that contacts the connection base from the other side in the engagement direction in a state where the first engagement portion and the second engagement portion are engaged with each other in a concave and convex manner,
3. The hot water supply according to claim 2, wherein the third portion has a facing guide portion that is inclined rearward and toward the other side of the engagement direction in a portion of the third portion that is located rearward of the contact portion. vessel. The neutralizer has a front wall that partitions a space from the front for neutralizing the drain water,
The water heater according to any one of claims 1 to 3, wherein the connected portion and the connection base are located forward of the front wall of the neutralizer. The water heater according to any one of claims 1 to 3, wherein the length of the casing in the front-rear direction is greater than the length of the casing in the width direction. The water heater according to any one of claims 1 to 3, wherein the first fitting part is configured to perform a function other than the function of fitting into the second fitting part. The identifying means is the combustion device,
The connection base has a flow path through which fuel gas for generating the combustion gas passes,
The water heater according to claim 6, wherein the other function is a function of assisting measurement of pressure, temperature, or flow rate in the flow path.

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