water heater

Abstract

To provide a technology which enables efficient attachment work of a connected body, in which a combustion apparatus, a heat exchanger, and an exhaust part are integrally connected, in a water heater where the connected body is disposed in a housing.SOLUTION: A water heater 1 has: a pair of housing side fixing parts 22A, 22B fixed to a back wall 2G; and a pair of connected body side fixing parts 72A, 72B provided at a connected body 90. In a state where one housing side fixing part 22A and one guide part 74A face each other in a lateral direction, while the other housing side fixing part 22B and the other guide part 74B face each other in the lateral direction and the housing side fixing parts 22A, 22B at both sides are arranged between the guide parts 74A, 74B at both sides, one connection member 62A is inserted into one first screw hole part 32A and one second screw hole part 82A and the other connection member 62B is inserted into the other first screw hole part 32B and the other second screw hole part 82B.SELECTED DRAWING: Figure 7

Description

[Technical Field]

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

[0002] An example of a water heater is disclosed in Patent Document 1. In the water heater of Patent Document 1, most of the connected body, which is an integrated unit of a burner unit, a heat exchanger, an exhaust hood, an exhaust pipe, etc., is housed in a housing, and a part of the exhaust pipe is exposed to the outside of the housing. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-24075 Summary of the Invention [Problem to be solved by the invention]

[0004] In a water heater, when a combustion device with a burner, a heat exchanger, and an exhaust section for discharging combustion exhaust from the heat exchanger are installed, it is desirable to connect these together in order to ensure an appropriate flow path for the combustion exhaust.

[0005] In a water heater, when a connector that integrally connects a combustion device, a heat exchanger, an exhaust unit, etc. is installed inside the housing, it is desirable that this connector be removable for maintenance, etc. Furthermore, in such a water heater, it is desirable that the configuration be such that when a worker installs the connector inside the housing, the worker can easily and efficiently perform the installation work.

[0006] The present disclosure relates to a water heater in which a connecting member that integrally connects a combustion device, a heat exchanger, and an exhaust section is placed inside a housing, and one object of the disclosure is to provide a technology that makes it easy to efficiently install the connecting member. [Means for solving the problem]

[0007] The water heater according to the present disclosure includes: a housing having a rear wall; a combustion device having a burner that burns gas to generate combustion exhaust and that discharges the combustion exhaust to the outside of the combustion device; a heat exchanger fixed to the combustion device and configured so that the combustion exhaust gas discharged from the combustion device passes through the heat exchanger; an exhaust section fixed to the heat exchanger and forming a path for discharging the combustion exhaust gas discharged from the combustion device to the outside of the housing; and A water heater in which a connecting body in which the combustion device, the heat exchanger, and the exhaust part are integrally connected is housed in the housing, a pair of housing-side fixing portions fixed to the rear wall; a pair of connector-side fixing portions provided on the connector; a connecting member that connects the housing-side fixing portion and the connector-side fixing portion; and Each of the housing-side fixing portions has a front surface portion, the front surface of the front surface portion faces forward, and a first screw hole portion is formed in the front surface portion, Each of the connector-side fixing portions has an overlapping portion that overlaps the front surface portion and a guide portion that extends rearward from the overlapping portion, and the front surface of the overlapping portion faces forward, and a second screw hole portion is formed in the overlapping portion, With one of the housing side fixing portions and one of the guide portions facing each other in the left-right direction, and the other housing side fixing portion and the other guide portion facing each other in the left-right direction, and the housing side fixing portions on both sides being positioned between the guide portions on both sides, one of the connecting members is inserted into one of the first screw hole portions and one of the second screw hole portions, and the other connecting member is inserted into the other first screw hole portion and the other second screw hole portion. [Effects of the Invention]

[0008] According to the technology disclosed herein, in a water heater in which a connecting body that integrally connects a combustion device, a heat exchanger, and an exhaust section is placed inside a housing, the installation work of the connecting body can be easily performed efficiently. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a front view illustrating a water heater according to a first embodiment. [Figure 2] FIG. 2 is a front view illustrating the configuration of the water heater of FIG. 1 with the front cover and other components omitted. [Figure 3] FIG. 3 is an exploded perspective view illustrating the configuration of the housing, packing, etc. in the water heater of FIG. [Figure 4] FIG. 4 is a perspective view illustrating the configuration of a heat exchanger, a combustion device, a blower, etc. in the water heater of FIG. [Figure 5] 5 is a perspective view showing an exhaust unit and the like in the water heater of FIG. [Figure 6] FIG. 6 is a perspective view that schematically shows the structure of the configuration of FIG. 5 cut at a predetermined position. [Figure 7] 7 is a perspective view partially showing a structure on one side in the left-right direction for fixing the connector in the water heater of FIG. 1. FIG. [Figure 8] FIG. 8 is a perspective view showing a state in which the connecting member is removed from the structure of FIG. 7 and the connecting body is separated. [Figure 9] FIG. 9 is a perspective view showing the state in which the hanging plate is placed on the upper surface portion of the structure of FIG. [Figure 10] FIG. 10 is a perspective view showing a state in which the locking portion is inserted into the slit in the structure of FIG. [Figure 11] 11 is a perspective view partially showing the structure on the other side in the left-right direction for fixing the connector in the water heater of FIG. [Figure 12] 12 is a perspective view showing a state in which the connecting member has been removed from the structure of FIG. 11 and the connecting body has been separated. [Figure 13] FIG. 13 is a perspective view showing the state in which the hanging plate is placed on the upper surface portion of the structure of FIG. [Figure 14] FIG. 14 is a perspective view showing a state in which the locking portion is inserted into the slit in the structure of FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] The following describes exemplary embodiments of the present disclosure. Note that the following exemplary features [1] and [3] may be combined in any compatible combination.

[0011] [1] A housing having a rear wall; a combustion device that burns gas and discharges combustion exhaust gas generated by the combustion of the gas to the outside of the combustion device; a heat exchanger fixed to the combustion device and configured so that the combustion exhaust gas discharged from the combustion device passes through the heat exchanger; an exhaust section fixed to the heat exchanger and forming a path for discharging the combustion exhaust gas discharged from the combustion device to the outside of the housing; and A water heater in which a connecting body in which the combustion device, the heat exchanger, and the exhaust part are integrally connected is housed in the housing, a pair of housing-side fixing portions fixed to the rear wall; a pair of connector-side fixing portions provided on the connector; a connecting member that connects the housing-side fixing portion and the connector-side fixing portion; and Each of the housing-side fixing portions has a front surface portion, the front surface of the front surface portion faces forward, and a first screw hole portion is formed in the front surface portion, Each of the connector-side fixing portions has an overlapping portion that overlaps the front surface portion and a guide portion that extends rearward from the overlapping portion, and the front surface of the overlapping portion faces forward, and a second screw hole portion is formed in the overlapping portion, One of the housing-side fixing portions and one of the guide portions face each other in the left-right direction, the other housing-side fixing portion and the other guide portion face each other in the left-right direction, and the housing-side fixing portions on both sides are arranged between the guide portions on both sides. In this state, one of the connecting members is inserted into one of the first screw hole portions and one of the second screw hole portions, and the other of the connecting members is inserted into the other of the first screw hole portion and the other of the second screw hole portions. Water heater.

[0012] The water heater described in [1] has a pair of housing-side fixing portions fixed to the rear wall of the housing, and a pair of connecting body-side fixing portions provided on the connecting body. One housing-side fixing portion and one guide portion face each other in the left-right direction, and the other housing-side fixing portion and the other guide portion face each other in the left-right direction, with both housing-side fixing portions positioned between the guide portions. This configuration allows for fastening the disconnected connecting body to the rear wall of the housing during manufacturing or maintenance, by positioning both housing-side fixing portions on the housing side so that they are guided between both guide portions on the connecting body side, and then inserting and fastening the connecting member. This configuration allows for a worker to quickly position and fasten the "large and heavy connecting body" to the rear wall, making the connecting body installation work more efficient.

[0013] [2] Each of the housing-side fixed portions has an upper surface portion, the upper surface of the upper surface portion faces upward, and the positional relationship between the upper surface portion and the front surface portion is fixed; Each of the connecting body side fixing portions has a hanging plate, and the positional relationship of the hanging plate with respect to the overlapping portion and the guide portion is fixed, When each of the connecting members is detached from each of the connector-side fixing portions, one of the housing-side fixing portions and one of the guide portions face each other in the left-right direction, the other of the housing-side fixing portion and the other of the guide portions face each other in the left-right direction, and one of the hanging plates is placed on one of the upper surface portions and the other of the hanging plates is placed on the other upper surface portion, in a placed state, one of the first screw hole portions and one of the second screw hole portions are close to each other in the front-rear direction, and the other of the first screw hole portions and the other of the second screw hole portions are close to each other in the front-rear direction. The water heater described in [1].

[0014] The water heater described in [2] can be placed in the above-mentioned installed state during manufacturing, maintenance, or the like, when each connecting member is detached from its corresponding connecting body-side fixing portion. The installed state is a state in which one housing-side fixing portion and one guide portion face each other in the left-right direction, the other housing-side fixing portion and the other guide portion face each other in the left-right direction, one hanging plate is placed on the top surface portion of one, and the other hanging plate is placed on the top surface portion of the other. Furthermore, the installed state is also a state in which one first screw hole and one second screw hole are close to each other in the front-rear direction, and the other first screw hole and the other second screw hole are close to each other in the front-rear direction. In other words, the installed state allows the connecting body to be positioned in the left-right direction while the corresponding first screw hole and second screw hole are close to each other in the front-rear direction, so that when an operator aligns the connecting body, they can easily approach the "regular position where the connecting member can be easily inserted." Furthermore, when the connecting body is placed, the weight of the connecting body can be supported by each of the housing-side fixing parts, so the operator can move the connecting body closer to the normal position while reducing the burden of lifting the connecting body.

[0015] [3] A slit is provided on the upper surface of each of the housing-side fixing parts, A locking portion is provided on a lower portion of the hanging plate, In the placed state, when one of the hanging plates is placed on one of the upper surface portions, the slit provided in one of the upper surface portions is disposed in front of the locking portion of one of the hanging plates, and when the other of the hanging plates is placed on the other upper surface portion, the slit provided in the other of the upper surface portions is disposed in front of the locking portion of the other of the hanging plates. [2] The water heater described in [2].

[0016] In the water heater described in [3], when an operator places the connecting body in a placed state during manufacturing or maintenance, even if the hanging plate slides forward along the upper surface while the connecting body is in the placed state (i.e., even if the connecting body moves slightly forward), the locking portion can enter the slit and be locked. In particular, in the water heater described above, when the water heater is placed in the placed state, one housing-side fixing portion and one guide portion face each other in the left-right direction, and the other housing-side fixing portion and the other guide portion face each other in the left-right direction, with one hanging plate placed on one upper surface portion and the other hanging plate placed on the other upper surface portion. Because of this configuration, even if the connecting body cannot be maintained in the placed state and slides forward, the pair of guide portions can guide the connecting body forward while restricting its movement in the left-right direction, and as a result, the locking portion provided on the hanging plate can enter the slit and be locked. In this way, the water heater can easily prevent the connecting body from moving too far forward when placed on the table, and therefore can easily prevent the water heater from falling due to the connecting body moving too far forward.

[0017] First Embodiment The following description relates to the water heater 1 according to the first embodiment. 1. Overall configuration of water heater 1 Fig. 1 is a front view illustrating a water heater 1 according to a first embodiment. Fig. 2 is a front view illustrating a simplified configuration of the water heater 1 with a front cover part 1A removed.

[0018] In this specification, the up-and-down direction refers to the up-and-down direction of the water heater 1, and in the example of Figure 1 etc., the longitudinal direction of the water heater 1 is the up-and-down direction. Specifically, the vertical up-and-down direction when the water heater 1 is installed corresponds to an example of the up-and-down direction. In the examples of Figures 1 and 2, the direction in which each of the pair of side walls 2C, 2D provided on both sides of the housing main body 2B extends corresponds to an example of the up-and-down direction. The direction perpendicular to the flat surface with the largest area on the front of the front cover part 1A corresponds to an example of the front-and-back direction. In the examples of Figures 1 to 3, the direction in which the front cover part 1A and the rear wall 2G of the housing 2 face each other corresponds to an example of the front-and-back direction. The left-and-right direction is a direction perpendicular to the up-and-down direction and the front-and-back direction. In the example of Figure 2, the direction in which the upper wall 2E and the lower wall 2F of the housing main body 2B extend corresponds to an example of the left-and-right direction. Furthermore, the direction in which the pair of side walls 2C, 2D face each other corresponds to an example of the left-and-right direction.

[0019] As shown in Fig. 2, the water heater 1 includes a housing 2, a combustion device 3, a heat exchanger 4, an exhaust section 5, a blower 7, etc. The housing 2 houses the combustion device 3, the heat exchanger 4, the exhaust section 5, the blower 7, and other components. As shown in Fig. 3, the housing 2 includes a housing main body 2B, a front cover main body 2A, and a packing 2W. The housing 2 is a box-shaped case made of a metal material, and includes the housing main body 2B, which is a box-shaped body with an open front, and the front cover main body 2A, which is detachable from the housing main body 2B.

[0020] As shown in FIGS. 1 and 3, the front cover main body 2A constitutes the front portion of the housing 2. The housing main body 2B is a box-shaped case that houses the combustion device 3, the heat exchanger 4, and the like. In the example of FIG. 1, the front cover main body 2A is configured with an operating device 130 attached thereto to form a plate-shaped front cover portion 1A. The front cover portion 1A is a lid-like body that is attached to and detached from the front side of the housing main body 2B. As shown in FIG. 3, the front cover main body 2A includes a front wall portion 2H, an upper wall portion 2L, a lower wall portion 2M, and side walls 2J and 2K, and has a shallow box-like shape that is open at the rear. An opening 2X is formed in the front wall portion 2H, and the operating device 130 is fitted into the opening 2X as shown in FIG. 1.

[0021] The housing main body 2B has a pair of side walls 2C, 2D, a top wall 2E, a bottom wall 2F, and a rear wall 2G, which are integrally connected. The pair of side walls 2C, 2D, the top wall 2E, the bottom wall 2F, and the rear wall 2G are all plate-shaped. The rear wall 2G is disposed behind the connecting body 90, which will be described later, and covers the connecting body 90 from the rear side. The rear wall 2G is formed, for example, from a metal plate whose thickness direction is in the front-to-rear direction and has partial unevenness. When viewed from the front, the rear wall 2G has a rectangular shape whose longitudinal direction is in the up-to-down direction. As shown in FIG. 3, the top wall 2E is connected to the upper end of the rear wall 2G and extends forward from the upper end of the rear wall 2G. The top wall 2E covers the connecting body 90 from above. The bottom wall 2F is connected to the bottom end of the rear wall 2G and extends forward from the bottom end of the rear wall 2G. The bottom wall 2F covers the connecting body 90 from below. The side wall 2C is connected to the right end of the rear wall 2G, the right end of the top wall 2E, and the right end of the bottom wall 2F and extends forward from the right end of the rear wall 2G. The side wall 2C covers the connecting body 90 from the right side. The side wall 2D is connected to the left end of the rear wall 2G, the left end of the top wall 2E, and the left end of the bottom wall 2F and extends forward from the left end of the rear wall 2G. The side wall 2D covers the connecting body 90 from the left side. An opening 2Z at the front end of the housing main body 2B is formed by the pair of side walls 2C and 2D, the top wall 2E, and the front ends of the bottom wall 2F. The opening 2Z is ​​open to the front.

[0022] 3, the water heater 1 has a configuration in which a packing 2W is sandwiched between the opening 2Z and the front cover main body 2A, and the front cover main body 2A is fixed to the housing main body 2B from the front side, and the opening 2Z of the housing main body 2B is closed by the front cover part 1A. The housing main body 2B and the front cover main body 2A are connected by connecting members such as screws.

[0023] As shown in FIG. 2, the combustion device 3 is disposed near the center inside the housing 2. The heat exchanger 4 is disposed above the combustion device 3 inside the housing 2. The heat exchanger 4 is fixed to the combustion device 3 with the upper end of the combustion device 3 and the lower end of the heat exchanger 4 connected to each other. The exhaust section 5 is disposed above the heat exchanger 4 and is partially disposed inside the housing 2. The exhaust section 5 is fixed to the heat exchanger 4 with the upper end of the heat exchanger 4 and the lower end of the exhaust section 5 connected to each other. The gas distribution unit 10 is disposed between the combustion device 3 and the front cover section 1A. The gas distribution unit 10 is fixed to the front part of the combustion device 3. Furthermore, the blower 7 is fixed to the combustion device 3 from below. In this way, the combustion device 3, the heat exchanger 4, the exhaust section 5, the gas distribution unit 10, and the blower 7 are integrally connected to form a connected body 90. Most of the connector 90 is housed inside the housing 2, and only a portion (specifically, only a portion of the exhaust section 5) is disposed outside the housing 2.

[0024] The combustion device 3 shown in Figures 2 and 4 is a device that combusts gas (fuel gas) supplied via a gas distribution unit 10. The combustion device 3 is located above a blower 7 and receives air from the blower 7. The combustion device 3 includes an inner case 3A (hereinafter simply referred to as case 3A) and multiple burners (not shown) housed within the case 3A and into which gas supplied from the gas distribution unit 10 flows. The gas supplied from the gas distribution unit 10 is combusted within the case 3A to generate exhaust (combustion exhaust). An ignition discharge electrode, a flame rod for flame detection, and the like are provided on the upper front surface of the case 3A. The case 3A includes a peripheral wall portion 3B that surrounds the burner group on the front, rear, left, and right sides, and a bottom surface portion 3C that covers the lower side of the burner group, forming a box shape. The peripheral wall portion 3B has a front wall portion, a rear wall portion, and a pair of side walls. The bottom surface portion 3C is positioned so as to partially cover the opening at the lower end of the peripheral wall portion 3B. The upper end of the case 3A is configured as an opening that opens upward, and this opening functions as an outlet for discharging the combustion exhaust gas generated in the combustion device 3 toward the heat exchanger 4. In this way, the combustion device 3 functions to discharge the combustion exhaust gas generated by combustion in the case 3A to the outside of itself through the opening.

[0025] The heat exchanger 4 shown in Figures 2, 4, and 5 is a device to which the combustion exhaust gas generated by the combustion of gas in the combustion device 3 is supplied, and is configured so that the combustion exhaust gas discharged from the combustion device 3 passes through the interior of the heat exchanger 4. The heat exchanger 4 includes a metal casing 4A that forms the outer shell of the heat exchanger 4, and a heat transfer tube 4B housed inside the casing 4A. The lower end of the casing 4A is fixed to the upper end of the case 3A. The lower end of the casing 4A is provided with an opening serving as an inlet for introducing the combustion exhaust gas, and this opening (inlet) communicates with an opening (the outlet) at the upper end of the case 3A. The upper end of the casing 4A is provided with an opening serving as an outlet for discharging the combustion exhaust gas. The heat exchanger 4 introduces the combustion exhaust gas discharged from the combustion device 3 into its interior and passes it through, where heat exchange occurs between the combustion exhaust gas and water flowing through the heat transfer tube 4B, thereby heating the water passing through the heat transfer tube 4B. The combustion exhaust gas that has passed through the heat exchanger 4 is discharged into the exhaust section 5 from an opening (exhaust port) at the upper end of the casing 4A.

[0026] The exhaust unit 5 shown in FIGS. 2 and 5 is a device that forms a path for discharging the combustion exhaust gas discharged upward from the combustion device 3 out of the housing 2. The exhaust unit 5 includes an exhaust unit main body 5A and an exhaust pipe 100, which constitute the outer wall (outer shell) of the exhaust unit 5. An opening is provided at the lower end of the exhaust unit main body 5A as an inlet for introducing the combustion exhaust gas. The lower end of the exhaust unit main body 5A is fixed to the upper end of the casing 4A. The opening (inlet) at the lower end of the exhaust unit main body 5A communicates with the opening (exhaust) at the upper end of the casing 4A. The exhaust unit 5 functions as a flow path for introducing the combustion exhaust gas discharged from the heat exchanger 4 into the exhaust unit main body 5A, directing it upward, and discharging it to the outside of the water heater 1 via the exhaust pipe 100. The inner wall of the exhaust unit main body 5A and the inner wall of the exhaust pipe 100 function as inner walls of the flow path for directing the combustion exhaust gas to the outside of the housing 2.

[0027] The blower 7 shown in Figures 2, 4, etc. is a device that supplies air (air for combustion). The blower 7 is disposed below the combustion device 3. Specifically, the blower 7 is disposed below the bottom surface 3C of the combustion device 3. The blower 7 mainly comprises a case 7A and a drive unit 7B. The drive unit 7B includes a motor and multiple blades, and operates to supply air by utilizing the airflow generated by the rotation of the motor. In the example shown in Figure 4, the upper end of the case 7A is fixed to the lower end (specifically, the bottom surface 3C) of the case 3A, and the blower 7 is configured as part of a connecting body 90. When the drive unit 7B is operating, the blower 7 draws in air through an inlet 7Y and discharges the air from an outlet 7Z. An opening 3Y is partially provided in the bottom surface 3C, and air discharged from the outlet 7Z is sent into the case 3A through the opening 3Y. The case 7A is fixed to the case 3A in such a manner that the exhaust port 7Z and the opening 3Y communicate with each other.

[0028] In the water heater 1, the combustion device 3 combusts gas (fuel gas) supplied into the combustion device 3 via the gas distribution unit 10 within the inner case 3A. The exhaust gas (combustion exhaust gas) generated by the combustion of the gas within the inner case 3A is discharged from an opening at the top end of the inner case 3A and flows into the casing 4A of the heat exchanger 4. The combustion exhaust gas that has flowed into the heat exchanger 4 passes through the heat exchanger 4 and flows into the exhaust unit main body 5A of the exhaust unit 5. The exhaust gas that has flowed into the exhaust unit 5 then passes through the exhaust pipe 100 and is discharged to the outside of the water heater 1.

[0029] As shown in FIG. 2, the water heater 1 is provided with a gas inlet 91 to which an external gas pipe is connected, a water inlet 92 to which a water pipe is connected, and a hot water outlet 93 on the underside of the casing 2. The water inlet 92 is an inlet through which water is introduced from a water pipe installed outside the water heater 1. The water introduced into the water inlet 92 is supplied to the heat transfer tube of the heat exchanger 4 via a water supply pipe 115. A portion of the water supply pipe 115 is shown in FIG. 2. The hot water outlet 93 is an outlet through which hot water is discharged to the outside of the water heater 1. The hot water discharged from the heat transfer tube of the heat exchanger 4 is discharged from the hot water outlet 193 via a hot water outlet pipe 116 connected to the downstream end of the heat transfer tube. The gas inlet 91 is an inlet through which gas is introduced from a gas pipe installed outside the water heater 1. The gas introduced into the gas inlet 91 is supplied to the gas distribution unit 10 via a gas supply unit (details not shown) equipped with a main valve, a proportional valve, etc. The gas (fuel gas) supplied to the gas distribution unit 10 is distributed to pass through a plurality of holes provided in the combustion device 3, and is supplied to the combustion device 3 through these holes. The combustion device 3 combusts the gas (fuel gas) supplied into the combustion device 3 via the gas distribution unit 10. The exhaust gas (combustion exhaust gas) generated by the combustion of this gas in the combustion device 3 flows from the combustion device 3 into the heat exchanger 4, passes through the heat exchanger 4, and is discharged from exhaust section 5 to the outside (outside the water heater 1).

[0030] 2. Mounting structure for mounting the connecting body 90 The following description relates to a structure for attaching the connector 90 to the housing 2. As shown in FIGS. 7 and 11, a pair of housing-side fixing portions 22A and 22B are fixed to the rear wall 2G of the housing 2. The connector 90 is provided with a pair of connector-side fixing portions 72A and 72B. The pair of connector-side fixing portions 72A and 72B may be integral with the exhaust unit main body 5A that constitutes the exhaust unit 5, or may be attached to the exhaust unit main body 5A. Connecting members 62A and 62B are provided to connect the pair of housing-side fixing portions 22A and 22B and the pair of connector-side fixing portions 72A and 72B. Note that the housing-side fixing portions 22A and 22B and the connector-side fixing portions 72A and 72B are not shown in FIGS. 2, 5, and 6.

[0031] Each of the pair of housing-side fixing parts 22A, 22B has a front surface part, the front surface of which faces forward, and a first screw hole part formed in the front surface part. Furthermore, each of the pair of housing-side fixing parts 22A, 22B has an upper surface part, the upper surface of which faces upward, and the positional relationship between the upper surface part and the front surface part is fixed. Furthermore, the upper surface part of each of the pair of housing-side fixing parts 22A, 22B is provided with a slit and a mounting part located behind the slit.

[0032] As shown in FIG. 8 , one of the housing-side fixing portions 22A has a front surface portion 27A, the front surface of which faces forward, and a first screw hole portion 32A is formed in the front surface portion 27A. Specifically, the one of the housing-side fixing portions 22A is configured by bending a metal plate. The one of the housing-side fixing portions 22A has a pair of flat fixing portions 24A, 25A, an upper surface portion 26A that is bent to extend from the fixing portion 24A in the front-rear direction, a front surface portion 27A that is bent to extend from the upper surface portion 26A in the up-down direction, and a lower surface portion 28A that extends in the front-rear direction to connect the lower end of the front surface portion 27A to the upper end of the fixing portion 25A. The pair of fixing portions 24A, 25A are fixed to the rear wall 2G by fixing members 64A, 66A, such as screws. In the configuration of Figure 7, the pair of fixing portions 24A, 25A are fixed directly to the rear wall 2G so as to contact the rear wall 2G, but the pair of fixing portions 24A, 25A may also be fixed indirectly to the rear wall 2G via other members.

[0033] As shown in FIG. 8, the front surface portion 27A is flat and has a thickness direction that corresponds to the front-rear direction. The top surface portion 26A is flat and has a thickness direction that corresponds to the up-down direction. The top surface of the top surface portion 26A faces upward, and the positional relationship between the top surface portion 26A and the front surface portion 27A is fixed. The top surface portion 26A is provided with a slit 30A and a mounting portion 26X that is located behind the slit 30A. The slit 30A is a hole formed to penetrate the top surface portion 26A in the up-down direction. In the example of FIG. 8, the slit 30A is configured as an elongated hole that is long in the front-rear direction. The left-right width of the slit 30A is greater than the left-right width of the locking portion 77A, and is large enough to allow the locking portion 77A to be inserted therein.

[0034] As shown in FIG. 12 , the other housing-side fixing portion 22B has a front surface portion 27B, the front surface of which faces forward, and a first screw hole portion 32B formed in the front surface portion 27B. Specifically, the one housing-side fixing portion 22B is configured by bending a metal plate. The one housing-side fixing portion 22B has a pair of flat fixing portions 24B, 25B, an upper surface portion 26B bent to extend from the fixing portion 24B in the front-rear direction, a front surface portion 27B bent to extend from the upper surface portion 26B in the up-down direction, and a lower surface portion 28B extending in the front-rear direction to connect the lower end of the front surface portion 27B to the upper end of the fixing portion 25B. The pair of fixing portions 24B, 25B are fixed to the rear wall 2G by fixing members 64B, 66B, such as screws. In the configuration of Figure 7, the pair of fixing portions 24B, 25B are fixed directly to the rear wall 2G so as to contact the rear wall 2G, but the pair of fixing portions 24B, 25B may also be fixed indirectly to the rear wall 2G via other members.

[0035] As shown in FIG. 12, the front surface portion 27B is flat and has a thickness direction that corresponds to the front-rear direction. The top surface portion 26B is flat and has a thickness direction that corresponds to the up-down direction. The top surface of the top surface portion 26B faces upward, and the positional relationship between the top surface portion 26B and the front surface portion 27B is fixed. The top surface portion 26B is provided with a slit 30B and a mounting portion 26Y that is positioned rearward of the slit 30B. The slit 30B is a hole formed to penetrate the top surface portion 26B in the up-down direction. In the example of FIG. 12, the slit 30B is configured as an elongated hole that is long in the front-rear direction. The left-right width of the slit 30B is greater than the left-right width of the locking portion 77B, and is large enough to allow the locking portion 77B to be inserted therein.

[0036] As shown in FIG. 9, the connector-side fixing part 72A has an overlapping part 78A overlapping the front surface part 27A and a guide part 74A extending rearward from the overlapping part 78A, with the front surface of the overlapping part 78A facing forward and a second screw hole 82A formed in the overlapping part 74A. As shown in FIG. 9, the connector-side fixing part 72A has a hanging plate 76A, and the positional relationship of the hanging plate 76A with respect to the overlapping part 78A and the guide part 74A is fixed. The hanging plate 76A has a locking part 77A on its lower portion. As shown in FIG. 13, the connector-side fixing part 72B has an overlapping part 78B overlapping the front surface part 27B and a guide part 74B extending rearward from the overlapping part 78B, with the front surface of the overlapping part 78B facing forward and a second screw hole 82B formed in the overlapping part 78B. 13, the connector side fixing part 72B has a hanging plate 76B, and the positional relationship of the hanging plate 76B with respect to the overlapping part 78B and the guide part 74B is fixed. A locking part 77B is provided on the lower part of the hanging plate 76B.

[0037] As shown in FIG. 8, one connector-side fixing portion 72A is disposed on one side of the connector 90 in the left-right direction (the right side in the example shown in FIG. 8, etc.). One connector-side fixing portion 72A has an overlapping portion 78A overlapping the front surface portion 27A, a guide portion 74A extending rearward from the overlapping portion 78A, and a hanging plate 76A. The overlapping portion 78A is configured in a plate shape with its thickness direction in the front-to-rear direction, and an upper region is connected to the hanging plate 76A and a lower region is connected to the guide portion 74A. The positional relationship of the hanging plate 76A with respect to the overlapping portion 78A and the guide portion 74A is fixed. The front surface of the overlapping portion 78A faces forward, and a second screw hole 82A is formed in a lower region of the overlapping portion 78A (specifically, a region below the vertical center position of the overlapping portion 78A). In the configuration shown in Fig. 8, one of the connector-side fixing parts 72A is formed by bending a metal plate. As shown in Fig. 7, the overlapping part 78A is formed in a flat plate shape with its thickness direction as the front-rear direction, with one of its plate surfaces (front surface) facing forward and the other plate surface facing backward and partially facing the front surface part 27A.

[0038] The guide portion 74A is configured in a cantilevered shape so as to bend rearward from an end portion on one side in the left-right direction of the overlapping portion 78A (the right end portion in a region below the vertical center position of the overlapping portion 78A in the example of FIG. 8). The guide portion 74A is connected to a region below the vertical center of the overlapping portion 78A and extends in the front-to-rear direction. The guide portion 74A is configured in a flat plate shape, and the plate thickness direction is the left-to-right direction. The guide portion 74A is positioned on one side in the left-to-right direction (the right side in the example of FIG. 8) and below the hanging plate 76A, and the hanging plate 76A and the guide portion 74A are arranged in a stepped shape.

[0039] The hanging plate 76A is configured in a cantilevered shape so as to bend rearward from one end of the overlapping portion 78A in the left-right direction (the right end in a region above the vertical center of the overlapping portion 78A in the example of FIG. 8). The hanging plate 76A is connected to a region above the vertical center of the overlapping portion 78A and extends in the front-to-rear direction. The hanging plate 76A is configured in a flat plate shape, and its thickness direction is in the left-to-right direction. The rear end of the hanging plate 76A is located rearward of the rear end of the guide portion 74A. In other words, the extent to which the hanging plate 76A extends rearward is greater than the extent to which the guide portion 74A extends rearward. A locking portion 77A is provided on the lower portion of the hanging plate 76A. The locking portion 77A is provided so as to protrude downward at the rear end side of the lower end of the hanging plate 76A. At the lower end of the hanging plate 76A, a recess 75A recessed upward is provided in front of the locking portion 77A, and the locking portion 77A is formed so as to protrude downward from the upper end of the recess 75A.

[0040] As shown in FIG. 12, the other connector-side fixing portion 72B is disposed on the other left-right side of the connector 90 (the left side in the example of FIG. 12, etc.). The other connector-side fixing portion 72B has an overlapping portion 78B overlapping the front surface portion 27B, a guide portion 74B extending rearward from the overlapping portion 78B, and a hanging plate 76B. The overlapping portion 78B is configured as a plate with its thickness direction in the front-to-rear direction, and an upper region is connected to the hanging plate 76B and a lower region is connected to the guide portion 74B. The positional relationship of the hanging plate 76B with respect to the overlapping portion 78B and the guide portion 74B is fixed. The front surface of the overlapping portion 78B faces forward, and a second screw hole portion 82B is formed in a lower region of the overlapping portion 78B (specifically, a region below the vertical center position of the overlapping portion 78A). In the configuration shown in Fig. 12, the other connector-side fixed portion 72B is configured by bending a metal plate. As shown in Fig. 11, the overlapping portion 78B is configured as a flat plate with its plate thickness direction as the front-rear direction, with one plate surface (front surface) facing forward and the other plate surface facing backward and partially facing the front surface portion 27B.

[0041] The guide portion 74B is configured in a cantilevered shape so as to bend rearward from the other end of the overlapping portion 78B in the left-right direction (the left end in a region below the vertical center position of the overlapping portion 78B in the example of FIG. 12). The guide portion 74B is connected to a region below the vertical center of the overlapping portion 78B and extends along the front-to-rear direction. The guide portion 74B is configured in a flat plate shape, and the plate thickness direction is the left-to-right direction. The guide portion 74B is positioned on the other side in the left-to-right direction (the left side in the example of FIG. 12) and below the hanging plate 76B, and the hanging plate 76B and the guide portion 74B are arranged in a stepped shape.

[0042] The hanging plate 76B is configured in a cantilevered shape so as to bend rearward from the other end of the overlapping portion 78B in the left-right direction (the left end in a region above the vertical center of the overlapping portion 78B in the example of FIG. 12). The hanging plate 76B is connected to a region above the vertical center of the overlapping portion 78B and extends in the front-rear direction. The hanging plate 76B is configured in a flat plate shape, and its thickness direction is in the left-right direction. The rear end of the hanging plate 76B is located rearward of the rear end of the guide portion 74B. In other words, the extent to which the hanging plate 76B extends rearward is greater than the extent to which the guide portion 74B extends rearward. A locking portion 77B is provided on the lower portion of the hanging plate 76B. The locking portion 77B is provided so as to protrude downward at the rear end side of the lower end of the hanging plate 76B. At the lower end of the hanging plate 76B, a recess 75B recessed upward is provided in front of the locking portion 77B, and the locking portion 77B is formed so as to protrude downward from the upper end of the recess 75B.

[0043] In the water heater 1 configured in this manner, when the connecting body 90 is fixed, as shown in Figures 7 and 11, one housing-side fixing portion 22A and one guide portion 74A face each other in the left-right direction, the other housing-side fixing portion 22B and the other guide portion 74B face each other in the left-right direction, and both housing-side fixing portions 22A, 22B are positioned between both guide portions 74A, 74B, with one connecting member 62A inserted into one first screw hole portion 32A and one second screw hole portion 82A, and the other connecting member 62B inserted into the other first screw hole portion 32B and the other second screw hole portion 82B. Meanwhile, by removing the connecting members 62A, 62B, which are made of screws or the like, the connecting body 90 can be detached from the rear wall 2G side as shown in Figures 8 and 12.

[0044] When attaching the connecting body 90 from the detached state shown in Figures 8 and 12, it is desirable that the worker first place the connecting members 62A, 62B in the placed state shown in Figures 9 and 13. The placed state shown in Figures 9 and 13 is a state in which the connecting members 62A, 62B are detached from the connecting body-side fixed portions 72A, 72B, respectively, and in which one housing-side fixed portion 22A and one guide portion 74A face each other in the left-right direction as shown in Figure 9, and the other housing-side fixed portion 22B and the other guide portion 74B face each other in the left-right direction as shown in Figure 13. In this state, one hanging plate 76A is placed on one upper surface portion 26A (specifically, on one mounting portion 26X) as shown in Figure 9, and the other hanging plate 76B is placed on the other upper surface portion 26B (specifically, on one mounting portion 26Y) as shown in Figure 13. The placement portion 26X is a portion of the upper surface portion 26A that is located rearward of the slit 30A, and the placement portion 26Y is a portion of the upper surface portion 26B that is located rearward of the slit 30B.

[0045] In the above-described placement state shown in FIGS. 9 and 13 , the slit 30A provided in one upper surface portion 26A is located in front of the locking portion 77A of one hanging plate 76A, and when the other hanging plate 76B is placed on the other upper surface portion 26B, the slit 30B provided in the other upper surface portion 26B is located in front of the locking portion 77B of the other hanging plate 76B. In this state, one housing-side fixing portion 22A and the other housing-side fixing portion 22B are sandwiched between one guide portion 74A and the other guide portion 74B. In this state, as shown in FIG. 9 , the left and right ends (specifically, the right end) of the lower surface portion 28A extend along the front-rear direction, and one guide portion 74A is arranged to extend along the front-rear direction so as to contact or be close to the left and right end (right end) of the lower surface portion 28A. In this state, the guide portion 74A moves relatively in the front-rear direction along the left and right ends of the lower surface portion 28A. Similarly, the left and right ends (specifically, the right end) of the lower surface portion 28A extend along the front-rear direction, and one guide portion 74A is arranged to extend along the front-rear direction so as to contact or be close to the left and right ends (right end) of the lower surface portion 28A. In this state, the guide portion 74A moves relatively in the front-rear direction along the left and right ends of the lower surface portion 28A. Similarly, as shown in FIG. 13, the left and right ends (specifically, the left end) of the lower surface portion 28B extend along the front-rear direction, and the other guide portion 74B is arranged to extend along the front-rear direction so as to contact or be close to the left and right ends (left end) of the lower surface portion 28B. In this state, the guide portion 74B moves relatively in the front-rear direction along the left and right ends of the lower surface portion 28B. With this configuration, when the guide portions 74A and 74B move relative to the housing-side fixed portions 22A and 22B in the above-described placed state, both the guide portions 74A and 74B move in the front-rear direction. Therefore, when the worker places the connector 90 in the placed state as shown in Figures 9 and 13, if the distance between the first screw hole portion 32A and the second screw hole portion 82A is large and the distance between the first screw hole portion 32B and the second screw hole portion 82B is large, the worker can simply slide the connector 90 backward while the connector 90 is placed in the placed state using the guiding function of the guide portions 74A and 74B.When the connector 90 is slid backward while the connector 90 is placed in the placed state, the overlapping portion 78A and the front surface portion 27A come into contact after the connector 90 has moved backward to a certain extent, and the overlapping portion 78B and the front surface portion 27B come into contact, so the connector 90 will not move backward any further.In the above-described placed state, when the connecting body 90 reaches a position (restricted position) where it can no longer be moved rearward, as shown in Figures 9 and 13, one first screw hole portion 32A and one second screw hole portion 82A overlap while being close to each other in the front-to-back direction, and the other first screw hole portion 32B and the other second screw hole portion 82B overlap while being close to each other in the front-to-back direction. Therefore, the operator need only perform an operation to insert the connecting member 62A into one first screw hole portion 32A and one second screw hole portion 82A while maintaining the placed state, and insert the connecting member 62B into the other first screw hole portion 32B and the other second screw hole portion 82B.

[0046] In the above-described placement state, one hanging plate 76A is placed on one placement portion 26X as shown in FIG. 9, and the other hanging plate 76B is placed on the other placement portion 26Y as shown in FIG. 13. Even if the hanging plates are moved forward along the upper surface while in this placement state, the locking portions can be inserted into the slits and switched to the locked state as shown in FIGS. 10 and 14. For example, even if one hanging plate 76A slides forward on placement portion 26X while remaining in the placement state from the placement state shown in FIG. 9, the locking portion 77A can be inserted into the slit 30A as shown in FIG. 10 and switched to the locked state. Similarly, even if the other hanging plate 76B slides forward on placement portion 26Y while remaining in the placement state from the placement state shown in FIG. 13 and switched to the locked state as the locking portion 77B is inserted into the slit 30B as shown in FIG. 14. 9 and 13, when the hanging plates 76A, 76B move forward while remaining in the mounted state, the hanging plates 76A, 76B move forward while the housing-side fixed portions 22A, 22B are sandwiched between the guide portions 74A, 74B and their left-right positions are fixed. Therefore, the locking portions 77A, 77B move forward while their left-right positions are aligned with the left-right positions of the slits 30A, 30B. This makes it easier to insert the locking portions 77A, 77B into the slits 30A, 30B more reliably. The front-to-rear width of the locking portion 77A is smaller than the front-to-rear width of the slit 30A, and the left-to-right width of the locking portion 77A is smaller than the left-to-right width of the slit 30A. As shown in Fig. 10, when locking portion 77A is inserted into slit 30A, locking portion 77A enters slit 30A to a certain position, and then a peripheral portion of locking portion 77A (in the example of Fig. 10, a recess adjacent to the front side of locking portion 77A) is placed on a peripheral portion of slit 30A, thereby entering an locked state. Similarly, as shown in Fig. 14, when locking portion 77B is inserted into slit 30B, locking portion 77B enters slit 30B to a certain position, and then a peripheral portion of locking portion 77B (in the example of Fig. 14, a recess adjacent to the front side of locking portion 77B) is placed on a peripheral portion of slit 30B, thereby entering an locked state.Furthermore, when both of the locking portions 77A and 77B are in the locked state, the locking portions 77A and 77B are restricted from moving further forward, and the locked state is maintained, thereby preventing the connecting body 90 from falling off the housing side fixing portions 22A and 22B.

[0047] 3.Example of effects In the water heater 1, a pair of housing-side fixing portions 22A, 22B are fixed to the rear wall 2G of the housing 2, and a pair of connecting body-side fixing portions 72A, 72B are provided on the connecting body 90. One housing-side fixing portion 22A and one guide portion 74A face each other in the left-right direction, the other housing-side fixing portion 22B and the other guide portion 74B face each other in the left-right direction, and the housing-side fixing portions 22A, 22B on both sides are disposed between the guide portions 74A, 74B on both sides. Due to this configuration, when the connecting body 90 in a detached state is fixed to the rear wall 2G of the housing 2 during manufacturing or maintenance, the housing-side fixing portions 22A, 22B on both sides of the housing 2 can be positioned so as to be guided between the guide portions 74A, 74B on both sides of the connecting body 90, and then the connecting members 62A, 62B can be inserted and fixed. In this way, the configuration allows the worker to quickly position and fix the "large and heavy connecting body 90" to the rear wall 2G, and therefore the work of attaching the connecting body 90 can be carried out efficiently.

[0048] During manufacturing or maintenance, the water heater 1 can be in the above-described placed state when the connecting members 62A, 62B are detached from the connector-side fixing portions 72A, 72B, respectively, as shown in Figures 9 and 13. The placed state is a state in which one housing-side fixing portion 22A and one guide portion 74A face each other in the left-right direction, the other housing-side fixing portion 22B and the other guide portion 74B face each other in the left-right direction, one hanging plate 76A is placed on one top surface portion 26A, and the other hanging plate 76B is placed on the other top surface portion 26B. Furthermore, the placed state is also a state in which one first screw hole portion 32A and one second screw hole portion 82A are adjacent to each other in the front-rear direction, and the other first screw hole portion 32B and the other second screw hole portion 82B are adjacent to each other in the front-rear direction. That is, in the placed state, the connecting body 90 can be positioned in the left-right direction while the corresponding first screw hole portion and second screw hole portion can be brought into close proximity in the front-to-rear direction, so that when an operator aligns the connecting body 90, the connecting body 90 can easily approach the "regular position where the connecting members 62A, 62B can be easily inserted." Moreover, in the placed state, the weight of the connecting body 90 can be supported by each of the housing-side fixing portions 22A, 22B, so the connecting body 90 can be brought close to the regular position while reducing the burden on the operator of lifting the connecting body 90.

[0049] When a worker places connecting body 90 in a placed state during manufacturing or maintenance of water heater 1, even if hanging plates 76A, 76B slide forward along upper surface portions 26A, 26B while the water heater 1 is placed (i.e., even if connecting body 90 moves slightly forward), locking portions 77A, 77B can be inserted into slits 30A, 30B to place the water heater 1 in a locked state. In particular, when water heater 1 is placed as shown in Figures 9 and 13, one housing-side fixing portion 22A and one guide portion 74A face each other in the left-right direction, the other housing-side fixing portion 22B and the other guide portion 74B face each other in the left-right direction, and one hanging plate 76A is placed on one upper surface portion 26A and the other hanging plate 76B is placed on the other upper surface portion 26B. With this configuration, even if the placed state cannot be maintained and connecting body 90 slides forward, the pair of guide portions 74A, 74B can guide connecting body 90 forward while restricting left-right movement of connecting body 90, and as a result, locking portions 77A, 77B provided on hanging plates 76A, 76B can be inserted into and locked in slits 30A, 30B. In this way, water heater 1 can easily prevent connecting body 90 from moving too far forward when in the placed state, and therefore can easily prevent connecting body 90 from falling due to forward movement.

[0050] <Other embodiments> The present invention is not limited to the embodiments described above and illustrated in the drawings. For example, any combination of features of the above-described or following embodiments is possible within a range that does not contradict. Furthermore, any feature of the above-described or following embodiments may be omitted unless explicitly stated as essential. Furthermore, the above-described embodiments may be modified as follows.

[0051] In the above embodiment, the connector side fixing part is configured to be integrated with the exhaust part 5 or attached to the exhaust part 5, but the connector side fixing part may be configured to be integrated with either the combustion device 3 or the heat exchanger 4, or may be configured to be attached to either the combustion device 3 or the heat exchanger 4.

[0052] In the above embodiment, a part of the connecting body 90, which integrally connects the combustion device 3, the heat exchanger 4, and the exhaust section 5, is housed within the housing 2, but the entire connecting body 90 may also be housed therein.

[0053] In the above embodiment, one housing-side fixing part is provided on each side, but further housing-side fixing parts may be provided. Also, in the above embodiment, one connector-side fixing part is provided on each side, but further connector-side fixing parts may be provided.

[0054] In the above embodiment, one first screw hole is provided in each housing-side fixing portion, but two or more first screw holes may be provided in each housing-side fixing portion. Also, in the above embodiment, one second screw hole is provided in each connector-side fixing portion, but two or more second screw holes may be provided in each connector-side fixing portion. In either case, it is sufficient that a connecting member corresponding to the combination of the first screw hole and the second screw hole is provided. The first screw hole and the second screw hole do not need to have threads. A nut may be provided behind the second screw hole.

[0055] It should be noted that the embodiments disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is not limited to the embodiments disclosed herein, but is intended to include all modifications within the scope indicated by the claims or the scope equivalent to the claims. [Explanation of symbols]

[0056] 1: Water heater 2: Housing 2B: Main body 2G: Back wall 3: Combustion equipment 4: Heat exchanger 4B: Heat transfer tube 5: Exhaust section 5A: Exhaust unit body 22A: Housing side fixing part 22B: Housing side fixing part 26A:Top part 26B:Top part 26X: Placement section 26Y: Placement section 27A: Front part 27B: Front part 30A: Slit 30B: Slit 32A: First screw hole 32B: First screw hole 62A: Connecting member 62B: Connecting member 72A: Connector side fixing part 72B: Connector side fixing part 74A: Guide part 74B: Guide section 77A: Locking part 77B: Locking part 82A: Second screw hole 82B: Second screw hole 90: Concatenation

Claims

1. a housing having a rear wall; a combustion device that burns gas and discharges combustion exhaust gas generated by the combustion of the gas to the outside of the combustion device; a heat exchanger fixed to the combustion device and configured so that the combustion exhaust gas discharged from the combustion device passes through the heat exchanger; an exhaust section fixed to the heat exchanger and forming a path for discharging the combustion exhaust gas discharged from the combustion device to the outside of the housing; and A water heater in which a connecting body in which the combustion device, the heat exchanger, and the exhaust part are integrally connected is housed in the housing, a pair of housing-side fixing portions fixed to the rear wall; a pair of connector-side fixing portions provided on the connector; a connecting member that connects the housing-side fixing portion and the connector-side fixing portion; and Each of the housing-side fixing portions has a front surface portion, the front surface of the front surface portion facing forward, and a first screw hole portion formed in the front surface portion, Each of the connector-side fixing portions has an overlapping portion that overlaps the front surface portion and a guide portion that extends rearward from the overlapping portion, and the front surface of the overlapping portion faces forward, and a second screw hole portion is formed in the overlapping portion, One of the housing-side fixing portions and one of the guide portions face each other in the left-right direction, the other housing-side fixing portion and the other guide portion face each other in the left-right direction, and the housing-side fixing portions on both sides are arranged between the guide portions on both sides. In this state, one of the connecting members is inserted into one of the first screw hole portions and one of the second screw hole portions, and the other of the connecting members is inserted into the other of the first screw hole portion and the other of the second screw hole portion. Water heater.

2. each of the housing-side fixed portions has an upper surface portion, an upper surface of the upper surface portion faces upward, and a positional relationship between the upper surface portion and the front surface portion is fixed; Each of the connecting body side fixing portions has a hanging plate, and the positional relationship of the hanging plate with respect to the overlapping portion and the guide portion is fixed, When each of the connecting members is detached from each of the connector-side fixing portions, one of the housing-side fixing portions and one of the guide portions face each other in the left-right direction, the other of the housing-side fixing portion and the other of the guide portions face each other in the left-right direction, and one of the hanging plates is placed on one of the upper surface portions and the other of the hanging plates is placed on the other upper surface portion, in a placed state, one of the first screw hole portions and one of the second screw hole portions are close to each other in the front-rear direction, and the other of the first screw hole portions and the other of the second screw hole portions are close to each other in the front-rear direction. The water heater according to claim 1.

3. a slit is provided on the upper surface of each of the housing-side fixed portions, A locking portion is provided on a lower portion of the hanging plate, In the placed state, when one of the hanging plates is placed on one of the upper surface portions, the slit provided in one of the upper surface portions is disposed in front of the locking portion of one of the hanging plates, and when the other of the hanging plates is placed on the other upper surface portion, the slit provided in the other of the upper surface portions is disposed in front of the locking portion of the other of the hanging plates. The water heater according to claim 2.

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