Water heater

Abstract

A water heater according to one embodiment of the present disclosure comprises: a housing; a tank which is housed in the housing; a heat exchanger which is housed inside the housing; a first circulation pathway part which passes through the interior of the heat exchanger; a second circulation pathway part which passes through the interior of the tank and the heat exchanger; a pump which is connected to a first pipe that constitutes a portion of either the first circulation pathway part or the second circulation pathway part; and a retention member which is fixed to the housing. The first piping, the pump, and the heat exchanger connected to the pump via the first piping are all retained by the retention member.

Description

Technical Field

[0001] The present disclosure relates to a water heater.

Background Art

[0002] For example, Patent Document 1 describes a water heating device (water heater) in which a heat exchanger for water heating is fixed to the bottom of a case (housing).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the water heating device as described above, it is necessary to connect a plurality of pipes to the heat exchanger for water heating inside the case. Therefore, when other components of the water heating device are in the way and it is difficult to connect a plurality of pipes to the heat exchanger for water heating, it may be difficult to assemble the water heating device.

[0005] In view of the above circumstances, one object of the present disclosure is to provide a water heater having a structure capable of improving assemblability.

Means for Solving the Problems

[0006] One aspect of the water heater according to the present disclosure includes a housing, a tank housed inside the housing, a heat exchanger housed inside the housing, a first circulation path portion passing through the heat exchanger, a second circulation path portion passing through the tank and the heat exchanger, a pump connected to a first pipe constituting a part of one of the first circulation path portion and the second circulation path portion, and a holding member fixed to the housing, and the holding member holds the first pipe, the pump, and the heat exchanger connected to the pump by the first pipe.and , The holding member extends upward in the vertical direction from the bottom wall portion of the housing, and the first pipe, the pump, and the heat exchanger are arranged to face the holding member in a direction intersecting the vertical direction. .

Advantages of the Invention

[0007] According to the present disclosure, the assemblability of the water heater can be improved.

Brief Description of the Drawings

[0008] [Fig. 1] It is a diagram schematically showing the water heater in the embodiment. [Fig. 2] It is a perspective view showing the water heater main body in the embodiment. [Fig. 3] It is a perspective view showing the water heater main body with the front wall portion removed in the embodiment. [Fig. 4] It is a perspective view showing a part of the water heater main body with the front wall portion removed in the embodiment. [Fig. 5] It is a perspective view showing a part of the water heater main body with the front wall portion and the right wall portion removed in the embodiment. [Fig. 6] It is a perspective view showing the water heating circuit module in the embodiment. [Fig. 7] It is an exploded perspective view showing the water heating circuit module in the embodiment. [Fig. 8] It is a perspective view showing a part of the bottom wall portion of the housing, a part of the tank, and the water heating circuit module in the embodiment. [Fig. 9] It is a perspective view showing a part of the assembly procedure of the water heating circuit module in the embodiment.

Modes for Carrying Out the Invention

[0009] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. Note that the scope of the present disclosure is not limited to the following embodiments and can be arbitrarily changed within the scope of the technical idea of the present disclosure. In the following drawings, in order to make each configuration easy to understand, the scale and number in each structure may be different from those in the actual structure.

[0010] In the drawings, the X-axis, Y-axis, and Z-axis are shown as appropriate. The X-axis indicates one direction in the horizontal direction. The Y-axis indicates the other direction in the horizontal direction. The Z-axis indicates the vertical direction. In the following description, the horizontal direction along the X-axis is referred to as the "front-rear direction X", the horizontal direction along the Y-axis is referred to as the "left-right direction Y", and the vertical direction along the Z-axis is referred to as the "vertical direction Z". The front-rear direction X, the left-right direction Y, and the vertical direction Z are directions orthogonal to each other. In the following description, the side of the vertical direction Z toward which the arrow of the Z-axis points (+Z side) is defined as the upper side, and the side opposite to the side toward which the arrow of the Z-axis points (-Z side) is defined as the lower side. Also, the side of the front-rear direction X toward which the arrow of the X-axis points (+X side) is defined as the front side, and the side opposite to the side toward which the arrow of the X-axis points (-X side) is defined as the rear side. Also, the left-right direction Y is the left-right direction when the hot water supply machine main body 10 in the following embodiment is viewed from the front side (+X side). That is, the side of the left-right direction Y toward which the arrow of the Y-axis points (+Y side) is defined as the right side, and the side opposite to the side toward which the arrow of the Y-axis points (-Y side) is defined as the left side.

[0011] FIG. 1 is a diagram schematically showing the hot water supply machine 100 in the present embodiment. The hot water supply machine 100 in the present embodiment shown in FIG. 1 is a heat pump hot water supply machine. As shown in FIG. 1, the hot water supply machine 100 includes a hot water supply machine main body 10 and an outdoor unit 20. The hot water supply machine main body 10 and the outdoor unit 20 are connected to each other by a third circulation path portion 83 through which the refrigerant R flows inside. Examples of the refrigerant R include a fluorine-based refrigerant having a low global warming potential (GWP: Global Warming Potential) or a hydrocarbon-based refrigerant. Although not shown, the outdoor unit 20 has a heat exchanger and a compressor that circulates the refrigerant R in the third circulation path portion 83.

[0012] FIG. 2 is a perspective view showing the hot water supply machine main body 10. As shown in FIG. 2, the hot water supply machine main body 10 has a substantially rectangular parallelepiped shape that is long in the vertical direction Z. The hot water supply machine main body 10 has a housing 11. The housing 11 has a substantially rectangular parallelepiped box shape that is long in the vertical direction Z. The housing 11 has a substantially square shape having a pair of sides extending in the front-rear direction X and a pair of sides extending in the left-right direction Y when viewed in the vertical direction Z.

[0013] The housing 11 has a bottom wall portion 11a located on the lower side, a top wall portion 11b located on the upper side, a front wall portion 11c located on the front side (+X side), a left wall portion 11d located on the left side (-Y side), a right wall portion 11e located on the right side (+Y side), and a rear wall portion 11k located on the rear side (-X side). The bottom wall portion 11a, the top wall portion 11b, the front wall portion 11c, the left wall portion 11d, the right wall portion 11e, and the rear wall portion 11k are separate from each other.

[0014] FIG. 3 is a perspective view showing the water heater main body 10 with the front wall portion 11c removed. FIG. 4 is a perspective view showing a part of the water heater main body 10 with the front wall portion 11c removed. FIG. 5 is a perspective view showing a part of the water heater main body 10 with the front wall portion 11c and the right wall portion 11e removed.

[0015] As shown in FIGS. 3 and 4, the bottom wall portion 11a has a bottom plate portion 11h and a frame portion 11i. The bottom plate portion 11h is a substantially square plate shape with the plate surface facing the vertical direction Z. The frame portion 11i projects upward from the outer edge portion of the bottom plate portion 11h. The frame portion 11i is in a substantially square frame shape. As shown in FIG. 2, the front wall portion 11c extends upward from the front side (+X side) edge portion of the bottom wall portion 11a. The rear wall portion 11k extends upward from the rear side (-X side) edge portion of the bottom wall portion 11a. The left wall portion 11d extends upward from the left side (-Y side) edge portion of the bottom wall portion 11a. The right wall portion 11e extends upward from the right side (+Y side) edge portion of the bottom wall portion 11a. The top wall portion 11b is a substantially square plate shape with the plate surface facing the vertical direction Z. The upper end portions of the front wall portion 11c, the rear wall portion 11k, the left wall portion 11d, and the right wall portion 11e are respectively connected to the outer edge portion of the top wall portion 11b.

[0016] As shown in FIGS. 3 and 4, the right wall portion 11e has a right plate portion 11f and a flange portion 11g. The right plate portion 11f is in the shape of a substantially rectangular plate that is long in the vertical direction Z. The plate surface of the right plate portion 11f faces the left - right direction Y. The flange portion 11g protrudes leftward (-Y side) from the front - side (-X side) edge of the right plate portion 11f. The flange portion 11g is in the shape of an elongated substantially rectangular plate that is long in the vertical direction Z. The plate surface of the flange portion 11g faces the front - rear direction X.

[0017] As shown in FIG. 1, the water heater main body 10 has a tank 12, a first heat exchanger 31, a second heat exchanger 32, a first circulation path portion 81, a second circulation path portion 82, a heater 13, a three - way valve 14, a first pump 15a, a second pump 15b, and a control unit 17. The tank 12, the first heat exchanger 31, the second heat exchanger 32, the first circulation path portion 81, the second circulation path portion 82, the heater 13, the three - way valve 14, the first pump 15a, the second pump 15b, and the control unit 17 are housed inside the housing 11.

[0018] The first circulation path portion 81 is a path portion through which water W1 circulates inside. The first circulation path portion 81 passes through the second heat exchanger 32. A first pump 15a for circulating water W1 in the first circulation path portion 81 is provided in the first circulation path portion 81.

[0019] The second circulation path portion 82 is a path portion through which water W2 circulates inside. The water W2 flowing in the second circulation path portion 82 is, for example, the same type of water as the water W1 flowing in the first circulation path portion 81. Note that the water W2 flowing in the second circulation path portion 82 may be a different type of water from the water W1 flowing in the first circulation path portion 81. Also, the liquid flowing in the second circulation path portion 82 does not have to be water. The second circulation path portion 82 passes through the inside of the tank 12 and the second heat exchanger 32. A second pump 15b for circulating water W2 in the second circulation path portion 82 is provided in the second circulation path portion 82.

[0020] The first heat exchanger 31 is a heat exchanger that performs heat exchange between the water W1 flowing in the first circulation path section 81 and the refrigerant R flowing in the third circulation path section 83. The second heat exchanger 32 is a heat exchanger that performs heat exchange between the water W1 flowing in the first circulation path section 81 and the water W2 flowing in the second circulation path section 82. The first heat exchanger 31 and the outdoor unit 20 are connected to each other via the third circulation path section 83. The first heat exchanger 31 and the second heat exchanger 32 are connected to each other via the first circulation path section 81. The tank 12 and the second heat exchanger 32 are connected to each other via the second circulation path section 82.

[0021] As shown in FIGS. 3 to 5, the tank 12 is cylindrical and extends in the vertical direction Z. The tank 12 stores the water W2 inside. The inside of the tank 12 is sealed. For example, the entire inside of the tank 12 is filled with the water W2. Note that in a state where the water heater 100 is operating, the water W2 stored inside the tank 12 is heated and has become hot water. As shown in FIG. 3, the tank 12 is covered with a heat insulating material 12c. The heat insulating material 12c can suppress the temperature of the water W2 stored in the tank 12 from decreasing.

[0022] As shown in FIG. 1, a water supply pipe 12a is connected to the tank 12. The water supply pipe 12a is a pipe for supplying the water W2 to the inside of the tank 12. One end portion of the water supply pipe 12a is connected to, for example, the lower portion of the tank 12. The other end portion of the water supply pipe 12a protrudes upward from the top wall portion 11b of the housing 11 and is connected to a water pipe (not shown).

[0023] The hot water supply pipe 12b is connected to the tank 12. The hot water supply pipe 12b is a pipe for discharging the water W2 inside the tank 12 to the outside of the tank 12. The water W2 discharged from the hot water supply pipe 12b to the outside of the tank 12 is heated and has become hot water. One end of the hot water supply pipe 12b is connected to, for example, the upper part of the tank 12. The other end of the hot water supply pipe 12b protrudes upward from the top wall portion 11b of the housing 11 and is connected to, for example, a pipe that leads to a faucet used by the user. For example, when the user opens the faucet, the hot water W2 flows through the hot water supply pipe 12b and merges with the unheated tap water, and is discharged from the opened faucet at the temperature set by the user.

[0024] As shown in FIGS. 4 and 5, the first heat exchanger 31 and the second heat exchanger 32 are located on the front side (+X side) of the tank 12 inside the housing 11. The first heat exchanger 31 is located at the front and left (-Y side) end of the lower part inside the housing 11. The second heat exchanger 32 is located at the front and right (+Y side) end of the lower part inside the housing 11. The first heat exchanger 31 and the second heat exchanger 32 are arranged opposite to each other with a space therebetween in the left-right direction Y. The first heat exchanger 31 and the second heat exchanger 32 extend in the vertical direction Z. The first heat exchanger 31 and the second heat exchanger 32 are, for example, plate-type heat exchangers having a plurality of plates inside. Note that the types of the first heat exchanger 31 and the second heat exchanger 32 are not particularly limited, and heat exchangers of a method other than the plate type may be used. The second heat exchanger 32 will be described in detail later.

[0025] The refrigerant R flowing in the third circulation path portion 83 shown in Fig. 1 passes through the first heat exchanger 31 in a relatively high temperature state via a compressor and a heat exchanger (not shown) provided in the outdoor unit 20. The water W1 flowing in the first circulation path portion 81 absorbs heat from the refrigerant R in the first heat exchanger 31. As a result, the water W1 passing through the first heat exchanger 31 is heated and becomes hot water. The heated hot water W1 passes through the second heat exchanger 32. Among the water W2 flowing in the second circulation path portion 82, the water W2 flowing out from the tank 12 absorbs heat from the water W1 in the second heat exchanger 32. As a result, the water W2 passing through the second heat exchanger 32 is heated and becomes hot water. The hot water W2 flows into the tank 12. In this way, the water W2 in the tank 12 can be heated to hot water. Therefore, the user can take out the hot water W2 in the tank 12 in a hot water state through the hot water supply pipe 12b.

[0026] When a part of the water W2 is discharged outside the tank 12 through the hot water supply pipe 12b, the same amount of water W2 as the discharged water W2 is supplied into the tank 12 from the water supply pipe 12a. The user can set the water heater 100 to the hot water supply mode in which the water W2 in the tank 12 is heated by using a remote controller (not shown).

[0027] In addition, the user can utilize the heat of the water W1 in the first circulation path portion 81 heated by the refrigerant R for indoor heating or the like. Specifically, by switching the three-way valve 14 provided in the first circulation path portion 81, the water W1 flowing inside the first circulation path portion 81 flows through a pipe (not shown) connected to the water heater main body 10 and flows into an indoor heating device such as a radiator arranged outside the water heater main body 10. The water W1 flowing into the indoor heating device flows back into the water heater main body 10 again and returns to the first circulation path portion 81.

[0028] The heater 13 is provided in the first circulation path section 81. The heater 13 is connected to the downstream side of the first heat exchanger 31 in the flow direction of the water W1 in the first circulation path section 81. The heater 13 warms the water W1 flowing out from the first heat exchanger 31. Thereby, even when the water W1 that has absorbed heat from the refrigerant R in the first heat exchanger 31 is not sufficiently warmed, the water W1 can be sufficiently warmed by the heater 13. As shown in FIG. 3, the heater 13 is located above the first heat exchanger 31 within the housing 11.

[0029] The control unit 17 is housed in the upper end portion inside the housing 11. Inside the housing 11, the control unit 17 is located on the front side (+X side) of the tank 12. The control unit 17 controls each part of the water heater 100.

[0030] The water heater main body 10 has a hot water supply circuit module 40. The hot water supply circuit module 40 constitutes a part of the second circulation path section 82. The hot water supply circuit module 40 is housed inside the housing 11. The hot water supply circuit module 40 is located on the front side (+X side) of the tank 12 inside the housing 11. In the present embodiment, the hot water supply circuit module 40 is located at the front and right side (+Y side) end portion in the lower part inside the housing 11. The hot water supply circuit module 40 is covered from the right side by the right plate portion 11f of the right wall portion 11e and is covered from the front side by the front wall portion 11c.

[0031] FIG. 6 is a perspective view showing the hot water supply circuit module 40. FIG. 7 is an exploded perspective view showing the hot water supply circuit module 40. FIG. 8 is a perspective view showing a part of the bottom wall portion 11a of the housing 11, a part of the tank 12, and the hot water supply circuit module 40. As shown in FIGS. 6 and 7, the hot water supply circuit module 40 includes a holding member 41, a first pipe 51, a second pump 15b, a second pipe 52, and a second heat exchanger 32.

[0032] The holding member 41 is a member that holds each component of the hot water supply circuit module 40. The holding member 41 holds the first pipe 51, the second pump 15b, the second pipe 52, and the second heat exchanger 32. In the present embodiment, the holding member 41 is a sheet metal member formed by subjecting sheet metal to press working. As shown in FIG. 8, the holding member 41 extends upward in the vertical direction Z from the bottom wall portion 11a of the housing 11. The lower end portion of the holding member 41 is fixed to the bottom wall portion 11a. More specifically, the lower end portion of the holding member 41 is fixed to the corner portion 11j of the frame portion 11i by two bolts 90. The corner portion 11j is a corner portion located on the front side (+X side) and the right side (+Y side) among the four corner portions of the substantially square frame-shaped frame portion 11i.

[0033] As shown in FIG. 7, the holding member 41 has a first holding plate portion 41a, a second holding plate portion 41b, an abutting portion 41c, a first upper flange portion 41p, a second upper flange portion 41q, a pair of clamping portions 41h, 41i, fixing portions 41e, 41f, 41g, and a bent portion 41d.

[0034] The first holding plate portion 41a is a substantially rectangular plate shape extending in the vertical direction Z. The plate surface of the first holding plate portion 41a faces in the left-right direction Y. The plate surface of the first holding plate portion 41a is orthogonal to the left-right direction Y. As shown in FIG. 8, a protruding portion 41r protruding downward is formed at the front end portion of the lower end portion of the first holding plate portion 41a. The protruding portion 41r is disposed so as to overlap with the right side of the portion of the frame portion 11i of the bottom wall portion 11a located on the right side (+Y side). The protruding portion 41r is fixed to the front end portion of the portion of the frame portion 11i located on the right side by a bolt 90.

[0035] As shown in FIG. 7, the second holding plate portion 41b is connected to the edge portion on the rear side (-X side) of the first holding plate portion 41a. The second holding plate portion 41b is a rectangular plate shape extending in the vertical direction Z. The plate surface of the second holding plate portion 41b faces in a direction inclined with respect to the left-right direction Y in the front-rear direction X. The plate surface of the second holding plate portion 41b is located on the left side (-Y side) as it goes toward the rear side (-X side). The second holding plate portion 41b protrudes rearward and leftward from the edge portion on the rear side of the first holding plate portion 41a.

[0036] The surface of the first holding plate portion 41a facing the left side (-Y side) among the plate surfaces is the first opposing surface 41u. The surface of the second holding plate portion 41b facing the left and front sides (+X side) among the plate surfaces is the second opposing surface 41v. The first opposing surface 41u and the second opposing surface 41v are side surfaces of the holding member 41 in a direction intersecting the vertical direction Z. The first opposing surface 41u and the second opposing surface 41v are surfaces facing the inside of the housing 11.

[0037] The abutting portion 41c protrudes from the front edge (+X side) of the first holding plate portion 41a to the left side (-Y side). The abutting portion 41c is an elongated substantially rectangular plate shape extending in the vertical direction Z. The plate surface of the abutting portion 41c faces the front-rear direction X. The plate surface of the abutting portion 41c is orthogonal to the front-rear direction X. The left end portion of the abutting portion 41c is located on the right side (+Y side) of the left end portion of the second holding plate portion 41b. As shown in FIG. 8, the lower end portion of the abutting portion 41c is disposed so as to overlap the front side of the portion of the frame portion 11i of the bottom wall portion 11a located on the front side (+X side). The lower end portion of the abutting portion 41c is fixed to the right end portion of the portion of the frame portion 11i located on the front side by a bolt 90.

[0038] As shown in FIG. 4, the flange portion 11g of the right wall portion 11e of the housing 11 is disposed so as to overlap the front side (+X side) of the abutting portion 41c. The abutting portion 41c is fixed to the flange portion 11g of the right wall portion 11e by a plurality of bolts. In the present embodiment, the holding member 41 is fixed to the housing 11 by fixing the abutting portion 41c to the flange portion 11g and the frame portion 11i, and fixing the protruding portion 41r formed at the lower end portion of the first holding plate portion 41a to the frame portion 11i.

[0039] As shown in FIG. 7, the first upper flange portion 41p protrudes leftward (-Y side) from the upper end portion of the first holding plate portion 41a. The first upper flange portion 41p is in the shape of a substantially rectangular plate extending in the front-rear direction X. The plate surface of the first upper flange portion 41p faces the vertical direction Z. The second upper flange portion 41q protrudes leftward and forward (+X side) from the upper end portion of the second holding plate portion 41b. The second upper flange portion 41q is in the shape of a substantially rectangular plate extending in the direction in which the second holding plate portion 41b extends as viewed in the vertical direction Z. The plate surface of the second upper flange portion 41q faces the vertical direction Z.

[0040] The pair of sandwiching portions 41h and 41i are formed on the first opposing surface 41u of the first holding plate portion 41a. The pair of sandwiching portions 41h and 41i protrude leftward (-Y side) from the first opposing surface 41u. In the present embodiment, the pair of sandwiching portions 41h and 41i are in the shape of rectangular plates whose plate surfaces face the vertical direction Z. The pair of sandwiching portions 41h and 41i are arranged at intervals in the vertical direction Z. The sandwiching portion 41h is located above the sandwiching portion 41i. The protruding length of the sandwiching portion 41i with respect to the first opposing surface 41u is smaller than the protruding length of the sandwiching portion 41h with respect to the first opposing surface 41u. In the present embodiment, the protruding lengths of the pair of sandwiching portions 41h and 41i are the dimensions in the left-right direction Y of the pair of sandwiching portions 41h and 41i. In the present embodiment, the pair of sandwiching portions 41h and 41i are formed by cutting and raising a part of the first holding plate portion 41a to the left side. As shown in FIG. 6, the pair of sandwiching portions 41h and 41i hold the second heat exchanger 32 while sandwiching it in the vertical direction Z.

[0041] As shown in Fig. 7, the fixing portions 41e, 41f, 41g are provided on the second holding plate portion 41b. The fixing portion 41e, the fixing portion 41f, and the fixing portion 41g are arranged side by side at intervals in the vertical direction Z in this order from the upper side to the lower side. The fixing portion 41e and the fixing portion 41f are located above the clamping portion 41h. The fixing portion 41g is located below the clamping portion 41i. The fixing portion 41e is connected to the edge portion on the left side (-Y side) and the front side (+X side) of the second upper flange portion 41q. The fixing portion 41f and the fixing portion 41g are connected to the second opposing surface 41v. In the present embodiment, the fixing portion 41f and the fixing portion 41g are formed by raising a part of the second holding plate portion 41b. The fixing portions 41e, 41f, 41g are substantially rectangular plate-shaped. The plate surfaces of the fixing portions 41e, 41f, 41g face the same direction as the second opposing surface 41v. The fixing portions 41e, 41f, 41g extend in a direction orthogonal to both the second opposing surface 41v and the vertical direction Z.

[0042] The bent portion 41d protrudes to the left side (-Y side) from a portion of the lower end portion of the first holding plate portion 41a that is located on the rear side (-X side) of the protruding portion 41r. The bent portion 41d has a first portion 41j that protrudes to the left side from the lower end portion of the first holding plate portion 41a, a second portion 41k that protrudes downward from the left end portion of the first portion 41j, and a third portion 41m that protrudes to the left side from the lower end portion of the second portion 41k. As shown in Fig. 5, the second portion 41k is located inside the frame portion 11i of the bottom wall portion 11a. The third portion 41m is disposed on the bottom plate portion 11h of the bottom wall portion 11a.

[0043] As shown in FIG. 7, the second heat exchanger 32 includes a substantially rectangular parallelepiped heat exchanger main body 32a extending in the vertical direction Z, and four connection ports 32b, 32c, 32d, 32e formed in the heat exchanger main body 32a. In the present embodiment, the heat exchanger main body 32a has a rounded rectangular shape having a pair of long sides extending in the vertical direction Z and a pair of short sides extending in the front-rear direction X when viewed in the left-right direction Y. As shown in FIG. 6, the heat exchanger main body 32a is sandwiched and held in the vertical direction Z by a pair of sandwiching portions 41h, 41i. Thereby, the second heat exchanger 32 is held by the holding member 41. Although not shown, the outer surface of the heat exchanger main body 32a is covered with a cushioning material. The pair of sandwiching portions 41h, 41i are in contact with the heat exchanger main body 32a via the cushioning material.

[0044] The second heat exchanger 32 is held by the first holding plate portion 41a via a pair of sandwiching portions 41h, 41i. The second heat exchanger 32 is disposed to face the left side (-Y side) of the first facing surface 41u in the first holding plate portion 41a. That is, the second heat exchanger 32 is disposed to face the holding member 41 in a direction intersecting the vertical direction Z. The second heat exchanger 32 is positioned in the vertical direction Z with respect to the holding member 41 by a pair of sandwiching portions 41h, 41i. In the present embodiment, the second heat exchanger 32 is disposed above the bottom wall portion 11a of the housing 11 in the vertical direction Z.

[0045] The right side (+Y side) surface of the second heat exchanger 32 is in contact with the first facing surface 41u. Thereby, the second heat exchanger 32 is positioned in the left-right direction Y with respect to the holding member 41. The second heat exchanger 32 is abutted against the abutting portion 41c in a direction intersecting the vertical direction Z. More specifically, the right end portion at the front end portion of the heat exchanger main body 32a is abutted against the abutting portion 41c from the rear side (-X side). Thereby, the second heat exchanger 32 is positioned in the front-rear direction X with respect to the holding member 41.

[0046] The four connection ports 32b, 32c, 32d, and 32e are formed on the left side (-Y side) surface of the heat exchanger main body 32a. In the present embodiment, the four connection ports 32b, 32c, 32d, and 32e are cylindrical and protrude to the left from the heat exchanger main body 32a. The four connection ports 32b, 32c, 32d, and 32e open toward the left (-Y direction). That is, the four connection ports 32b, 32c, 32d, and 32e are in a direction intersecting the vertical direction Z and open in the same direction as each other.

[0047] The connection port 32b is formed at the lower and front (+X side) corner of the left side (-Y side) surface of the heat exchanger main body 32a. The connection port 32c is formed at the upper and front corner of the left side surface of the heat exchanger main body 32a. The connection port 32d is formed at the upper and rear (-X side) corner of the left side surface of the heat exchanger main body 32a. The connection port 32e is formed at the lower and rear corner of the left side surface of the heat exchanger main body 32a. Two pipes constituting a part of the first circulation path section 81 and two pipes constituting a part of the second circulation path section 82 are respectively connected to the four connection ports 32b, 32c, 32d, and 32e.

[0048] As shown in FIG. 4, a third pipe 53 constituting a part of the first circulation path section 81 is connected to the connection port 32b. The third pipe 53 extends in the left-right direction Y and is connected to the second heat exchanger 32. The right side (+Y side) end of the third pipe 53 is connected to the connection port 32b.

[0049] A first discharge valve 61 is provided in the third pipe 53. The first discharge valve 61 protrudes from the third pipe 53 in a direction inclined with respect to the vertical direction Z in the front-rear direction X. The first discharge valve 61 protrudes from the third pipe 53 toward the front side (+X side) and the lower side. The tip of the first discharge valve 61 is located on the front side and the lower side of the second heat exchanger 32. That is, the first discharge valve 61 protrudes from the third pipe 53 to a position below the second heat exchanger 32 in the vertical direction Z. By opening the first discharge valve 61, at least a part of the water W1 in the first circulation path portion 81 can be discharged to the outside of the water heater 100 via the first discharge valve 61. In the present embodiment, the water W1 in the portion of the first circulation path portion 81 that passes through the second heat exchanger 32 can be discharged to the outside of the water heater 100 via the first discharge valve 61.

[0050] A fifth pipe 55 that forms a part of the first circulation path portion 81 is connected to the connection port portion 32c. The fifth pipe 55 extends in the left-right direction Y and is connected to the second heat exchanger 32. The right end (+Y side) of the fifth pipe 55 is connected to the connection port portion 32c. As shown in FIG. 1, in the first circulation path portion 81 of the present embodiment, the water W1 that has flowed into the second heat exchanger 32 from the third pipe 53 flows upward in the second heat exchanger 32 and flows out of the second heat exchanger 32 from the fifth pipe 55.

[0051] As shown in FIG. 4, a fourth pipe 54 that forms a part of the second circulation path portion 82 is connected to the connection port portion 32d. The fourth pipe 54 extends in the left-right direction Y and is connected to the second heat exchanger 32. The right end (+Y side) of the fourth pipe 54 is connected to the connection port portion 32d.

[0052] As shown in FIG. 6, a first pipe 51 that forms a part of the second circulation path portion 82 is connected to the connection port portion 32e. The first pipe 51 is a pipe that connects the second pump 15b and the second heat exchanger 32. The first pipe 51 includes a lower pipe portion 51a, a capture pipe portion 16, and an upper pipe portion 51b. In the present embodiment, the first pipe 51 is configured by connecting the lower pipe portion 51a, the capture pipe portion 16, and the upper pipe portion 51b in this order from the lower side to the upper side.

[0053] The lower piping portion 51a is connected to the connection port portion 32e. The lower piping portion 51a includes a first portion 51c extending from the connection port portion 32e to the left side (-Y side), a second portion 51d extending downward from the left end of the first portion 51c, a third portion 51e extending from the lower end of the second portion 51d to the right side (+Y side) and the rear side (-X side), and a fourth portion 51f extending upward from the right end of the third portion 51e. The lower portion of the second portion 51d, the third portion 51e, and the lower portion of the fourth portion 51f are portions of the first pipe 51 located below the second heat exchanger 32 in the vertical direction Z. A rubber member 71 is attached to the outer peripheral surface of the fourth portion 51f. The rubber member 71 surrounds a part of the fourth portion 51f.

[0054] A second discharge valve 62 is provided in the third portion 51e. The second discharge valve 62 protrudes from the third portion 51e in a direction inclined with respect to the lateral direction Y with respect to the front-rear direction X. The second discharge valve 62 protrudes from the third portion 51e to the front side (+X side) and the right side (+Y side). In the present embodiment, the second discharge valve 62 protrudes in a direction orthogonal to the vertical direction Z. The entire second discharge valve 62 is located below the second heat exchanger 32. As shown in FIG. 4, the second discharge valve 62 is located below the first discharge valve 61. By opening the second discharge valve 62, at least a part of the water W2 in the second circulation path portion 82 can be discharged to the outside of the water heater 100 via the second discharge valve 62. In the present embodiment, the water W2 in the portion passing through the second heat exchanger 32 in the second circulation path portion 82 can be discharged to the outside of the water heater 100 via the second discharge valve 62.

[0055] As shown in FIG. 7, the capture pipe portion 16 is connected to the upper end of the fourth portion 51f of the lower pipe portion 51a. The capture pipe portion 16 extends in the vertical direction Z. The inner diameter and outer diameter of the capture pipe portion 16 are larger than the inner diameter and outer diameter of the lower pipe portion 51a and the inner diameter and outer diameter of the upper pipe portion 51b. A capture material 16a is accommodated inside the capture pipe portion 16. The capture material 16a is spherical. In the present embodiment, a plurality of capture materials 16a are arranged side by side in the vertical direction Z inside the capture pipe portion 16.

[0056] The trapping material 16a is made of metal. Examples of the metal constituting the trapping material 16a include various stainless steels, iron, copper, brass, aluminum, zinc, tin, titanium, chromium, nickel, magnesium, tungsten, gold, silver, and platinum. The metal constituting the trapping material 16a may be an alloy containing one or more of these metals. The trapping material 16a is formed, for example, by intertwining a plurality of metal fibers extending in a spiral shape. The plurality of metal fibers are made of the metal constituting the trapping material 16a described above. Since the trapping material 16a is formed by intertwining a plurality of metal fibers extending in a spiral shape, voids are provided between the metal fibers. The ratio occupied by the voids in the spherical trapping material 16a, that is, the porosity, is 90% or more. Since the porosity of the trapping material 16a is 90% or more, the water W2 flowing in the trapping pipe portion 16 can pass through the trapping material 16a almost without resistance.

[0057] When the water W2 flowing in the second circulation path portion 82 flows into the trapping pipe portion 16 and contacts the trapping material 16a, components such as calcium carbonate contained in the water W2 precipitate and adhere to the trapping material 16a. The substance formed by the precipitation of components such as calcium carbonate contained in the water W2 in this way is called scale. Scale mainly consists of calcium carbonate, for example. The higher the hardness of the water W2, the more calcium carbonate components it contains. Therefore, scale is more likely to precipitate when the water W2 is hard water than when the water W2 is soft water.

[0058] The scale adheres to the surface of the metal fibers constituting the trapping material 16a. When the water W2 contacts the portion of the trapping material 16a to which the scale has adhered in a state where the scale adheres to the trapping material 16a, crystal growth occurs starting from the scale adhered to the trapping material 16a. As a result, the precipitation of scale in the trapping material 16a is accelerated, and the scale components in the water W2 can be preferably adhered to the trapping material 16a. In this way, by being able to trap the scale components in the water W2 by the trapping material 16a in the trapping pipe portion 16, it is possible to suppress the adhesion of scale to the inner surface of the tank 12 through which the second circulation path portion 82 passes and the inner surface of the second heat exchanger 32.

[0059] The upper pipe section 51b extends upward from the upper end of the capture pipe section 16 and is connected to the second pump 15b. The upper pipe section 51b connects the capture pipe section 16 and the second pump 15b. A rubber member 72 is attached to the outer peripheral surface of the upper pipe section 51b. The rubber member 72 surrounds a part of the upper pipe section 51b.

[0060] As shown in FIG. 6, the first pipe 51 is held by the holding member 41. More specifically, the first pipe 51 is held by the holding member 41 when the lower pipe section 51a and the upper pipe section 51b are respectively fixed to the holding member 41. The first pipe 51 is disposed to face the front side (+X side) of the second facing surface 41v in the second holding plate portion 41b. That is, the first pipe 51 is disposed to face the holding member 41 in a direction intersecting the vertical direction Z. The capture pipe section 16 is arranged side by side on the rear side (-X side) of the second heat exchanger 32.

[0061] FIG. 9 is a perspective view showing a part of the assembly procedure of the hot water supply circuit module 40. As shown in FIG. 9, the lower pipe section 51a is fixed to the fixing portion 41g by the fixing bracket 40c. The fixing bracket 40c is fixed to the fixing portion 41g with two bolts and sandwiches the fourth portion 51f of the lower pipe section 51a between it and the fixing portion 41g. The fixing bracket 40c sandwiches and fixes the portion of the fourth portion 51f where the rubber member 71 is attached between it and the fixing portion 41g to the fixing portion 41g.

[0062] The upper pipe section 51b is fixed to the fixing portion 41f by the fixing bracket 40b. The fixing bracket 40b is fixed to the fixing portion 41f with two bolts and sandwiches the upper pipe section 51b between it and the fixing portion 41f. The fixing bracket 40b sandwiches and fixes the portion of the upper pipe section 51b where the rubber member 72 is attached between it and the fixing portion 41f to the fixing portion 41f.

[0063] The holding member 41 holds a second pipe 52 that forms part of the second circulation path section 82. The second pipe 52 connects the second pump 15b and the tank 12. As shown in FIG. 7, the second pipe 52 has a first portion 52a that extends upward from the second pump 15b and a second portion 52b that is connected to the upper end of the first portion 52a. The first portion 52a and the second portion 52b are separate from each other. The second portion 52b extends upward from the upper end of the first portion 52a and then bends rearward (-X side) and leftward (-Y side). As shown in FIG. 8, the rear end of the second portion 52b is connected to the tank 12. More specifically, the rear end of the second portion 52b is connected to a connection portion 12d that protrudes from the tank 12.

[0064] As shown in FIG. 9, the second pipe 52 is held by the holding member 41 by being fixed to the fixing portion 41e by a fixing bracket 40a. The fixing bracket 40a is fixed to the fixing portion 41e with two bolts and sandwiches the second pipe 52 between it and the fixing portion 41e. The fixing bracket 40a fixes the first portion 52a of the second pipe 52 to the fixing portion 41e by sandwiching it between the fixing portion 41e. The lower portion of the first portion 52a of the second pipe 52 is disposed opposite the front side (+X side) of the second holding plate portion 41b. The upper portion of the first portion 52a and the second portion 52b of the second pipe 52 protrude above the holding member 41.

[0065] The second pump 15b is connected to the first pipe 51 and the second pipe 52. The second pump 15b is held by the holding member 41 because the first pipe 51 and the second pipe 52 are fixed to the holding member 41. In the present embodiment, the first pipe 51, the second pipe 52, and the second pump 15b are held by the second holding plate portion 41b via fixing portions 41e, 41f, 41g. The second pump 15b is disposed opposite the left side (-Y side) of the first holding plate portion 41a and the front side (+X side) of the second holding plate portion 41b. That is, the second pump 15b is disposed opposite the holding member 41 in a direction intersecting the vertical direction Z.

[0066] As shown in FIG. 1, in the second circulation path portion 82 of the present embodiment, the water W2 that has flowed into the second heat exchanger 32 from the tank 12 via the fourth pipe 54 flows downward within the second heat exchanger 32 and then flows out of the second heat exchanger 32 to the outside through the first pipe 51. The water W2 that has flowed into the first pipe 51 flows upward within the first pipe 51, passes through the capture pipe portion 16 and the second pump 15b in this order, and then returns to the tank 12.

[0067] The hot water supply circuit module 40 is attached inside the housing 11 in an assembled state. As shown in FIG. 6, in the state before being attached inside the housing 11, only the first pipe 51 out of the four pipes connected to the second heat exchanger 32 of the hot water supply circuit module 40 is in a connected state.

[0068] An operator who assembles the hot water supply machine main body 10, for example, assembles the parts of the hot water supply machine main body 10 excluding the right wall portion 11e, the front wall portion 11c, and the hot water supply circuit module 40 of the housing 11. As shown in FIG. 8, the operator fixes the lower end portion of the holding member 41 to the bottom wall portion 11a in a state where the front wall portion 11c and the right wall portion 11e are not attached, then fixes the right wall portion 11e to the bottom wall portion 11a, and fixes the flange portion 11g of the right wall portion 11e and the holding member 41. Further, the operator connects the second pipe 52 of the hot water supply circuit module 40 to the tank 12. After fixing the hot water supply circuit module 40 to the housing 11 in this way, the operator performs the work of connecting the third pipe 53, the fourth pipe 54, and the fifth pipe 55 to the second heat exchanger 32 from the front side (+X side) of the housing 11. After connecting each pipe to the second heat exchanger 32, the operator attaches the front wall portion 11c. In this way, the hot water supply machine main body 10 is assembled.

[0069] Note that the assembling method of the hot water supply machine main body 10 is not limited to the above-described assembling method. For example, other components other than the hot water supply circuit module 40, such as the tank 12, the first heat exchanger 31, the third pipe 53, the fourth pipe 54, and the fifth pipe 55, may be assembled after the hot water supply circuit module 40 is fixed.

[0070] According to this embodiment, the water heater 100 includes a holding member 41 fixed to the housing 11. The holding member 41 holds a first pipe 51, a second pump 15b, and a second heat exchanger 32 connected to the second pump 15b by the first pipe 51. In this way, since the second heat exchanger 32 can be held in a state where the first pipe 51 and the second pump 15b are connected to one holding member 41, like the hot water supply circuit module 40 of this embodiment, the first pipe 51, the second pump 15b, and the second heat exchanger 32 can be modularized together. Thereby, the first pipe 51, the second pump 15b, and the second heat exchanger 32 can be assembled outside the housing 11 in advance and then attached to the housing 11. Therefore, it is not necessary to perform the work of connecting the first pipe 51, the second pump 15b, and the second heat exchanger 32 to each other inside the housing 11, and the assembly work of the water heater 100 can be facilitated.

[0071] Also, before installing the second heat exchanger 32 in the housing 11, the first pipe 51 can be connected to the second heat exchanger 32. Therefore, the number of pipes connected to the second heat exchanger 32 in the housing 11 can be reduced. Thereby, the man-hours required for the work of connecting the pipes to the second heat exchanger 32 in the housing 11 can be reduced.

[0072] In addition, since the holding member 41 holds the first pipe 51 and the second pump 15b in addition to the second heat exchanger 32, when holding each component on the holding member 41, it is easy to arrange the first pipe 51 and the second pump 15b at positions where they do not interfere with the pipe connection work for the second heat exchanger 32. Thereby, when performing the work of connecting other pipes, that is, the third pipe 53, the fourth pipe 54, and the fifth pipe 55, to the second heat exchanger 32 in the housing 11, it is possible to prevent the first pipe 51 and the second pump 15b from getting in the way. Therefore, the work of connecting the third pipe 53, the fourth pipe 54, and the fifth pipe 55 to the second heat exchanger 32 in the housing 11 can be easily performed.

[0073] Further, by holding the second heat exchanger 32 together with the first pipe 51 and the second pump 15b by the holding member 41, it is not necessary to separately provide parts for attaching the second heat exchanger 32 to the housing 11. Therefore, the number of parts of the water heater 100 can be reduced by the number of such parts. Also, since it is not necessary to provide such parts inside the housing 11, it is easy to increase the working space when connecting pipes to the second heat exchanger 32 inside the housing 11. Thereby, the work of connecting the third pipe 53, the fourth pipe 54, and the fifth pipe 55 to the second heat exchanger 32 can be performed more easily inside the housing 11.

[0074] Also, since the second heat exchanger 32 is held by the holding member 41, the second heat exchanger 32 can be arranged together with the first pipe 51 and the second pump 15b close to the end inside the housing 11. Therefore, the shape of each pipe connected to the second heat exchanger 32 can be easily simplified, and it is easy to connect each pipe to the second heat exchanger 32.

[0075] As described above, according to the present embodiment, the assemblability of the water heater 100 can be improved. More specifically, the assemblability of the water heater main body 10 among the water heaters 100 can be improved.

[0076] Also, according to the present embodiment, the holding member 41 extends upward in the vertical direction Z from the bottom wall portion 11a of the housing 11. The first pipe 51, the second pump 15b, and the second heat exchanger 32 are arranged to face in a direction intersecting the vertical direction Z with respect to the holding member 41. By holding the first pipe 51, the second pump 15b, and the second heat exchanger 32 with respect to the holding member 41 in a direction intersecting the vertical direction Z, for example, compared with the case of holding each component above the holding member 41, the area for holding each component in the holding member 41 can be increased. Thereby, each component can be stably held by the holding member 41. Also, it is easy to open each connection port portion 32b, 32c, 32d, 32e of the second heat exchanger 32 in a direction intersecting the vertical direction Z. Thereby, the work of connecting each pipe to the second heat exchanger 32 can be performed more easily inside the housing 11.

[0077] Further, according to the present embodiment, the second heat exchanger 32 has four connection ports 32b, 32c, 32d, and 32e to which two pipes constituting a part of the first circulation path portion 81 and two pipes constituting a part of the second circulation path portion 82 are respectively connected. The four connection ports 32b, 32c, 32d, and 32e are oriented to intersect the vertical direction Z and open in the same direction as each other. Therefore, the third pipe 53, the fourth pipe 54, and the fifth pipe 55 can be connected to the second heat exchanger 32 from the same side within the housing 11. As a result, the work of connecting each pipe to the second heat exchanger 32 can be made easier inside the housing 11.

[0078] Further, according to the present embodiment, the holding member 41 has a pair of sandwiching portions 41h and 41i that sandwich the second heat exchanger 32 in the vertical direction Z. Therefore, the second heat exchanger 32 can be positioned in the vertical direction Z with respect to the holding member 41 and held by the holding member 41. Also, it is easy to hold the second heat exchanger 32 away from the bottom wall portion 11a of the housing 11 upward with respect to the holding member 41.

[0079] Further, according to the present embodiment, the protruding length of the sandwiching portion 41i that supports the second heat exchanger 32 from below is smaller than the protruding length of the sandwiching portion 41h that supports the second heat exchanger 32 from above. Therefore, even when the mass of the second heat exchanger 32 acts on the sandwiching portion 41i, it is easy to reduce the bending moment that attempts to bend the sandwiching portion 41i downward. As a result, it is possible to suppress the sandwiching portion 41i from bending downward, and the second heat exchanger 32 can be suitably supported from below by the sandwiching portion 41i.

[0080] Further, according to the present embodiment, the holding member 41 has an abutting portion 41c against which the second heat exchanger 32 abuts in a direction intersecting the vertical direction Z. Therefore, the second heat exchanger 32 can be positioned in a direction intersecting the vertical direction Z with respect to the holding member 41 and held by the holding member 41. In the present embodiment, the second heat exchanger 32 can be positioned in the front - rear direction X with respect to the holding member 41 by the abutting portion 41c.

[0081] Also, for example, when the operation of the water heater 100 is stopped for a long time, if the temperature of the place where the water heater main body 10 is installed is relatively low, the water W1, W2 in the second heat exchanger 32 may freeze and expand, and the second heat exchanger 32 may be damaged. Therefore, when the operation of the water heater 100 is stopped for a long time, etc., it is preferable to drain the water W1, W2 from the second heat exchanger 32. Specifically, the first discharge valve 61 and the second discharge valve 62 are opened to discharge the water W1, W2 from the second heat exchanger 32. Here, if the first discharge valve 61 and the second discharge valve 62 are located above the second heat exchanger 32, there is a risk that the water W1, W2 in the second heat exchanger 32 cannot be sufficiently discharged from the first discharge valve 61 and the second discharge valve 62. Therefore, the first discharge valve 61 and the second discharge valve 62 are preferably arranged below the second heat exchanger 32. However, for example, if the second heat exchanger 32 is arranged in contact with the bottom wall portion 11a, there is a problem that the bottom wall portion 11a gets in the way and the first discharge valve 61 and the second discharge valve 62 cannot be arranged below the second heat exchanger 32.

[0082] On the other hand, according to the present embodiment, the second heat exchanger 32 is arranged at a position separated upward in the vertical direction Z from the bottom wall portion 11a of the housing 11. Therefore, the first discharge valve 61 and the second discharge valve 62 provided in the pipes connected to the second heat exchanger 32 can be easily arranged below the second heat exchanger 32. Thereby, the water W1, W2 in the second heat exchanger 32 can be suitably discharged to the outside via the first discharge valve 61 and the second discharge valve 62. Therefore, when the operation of the water heater 100 is stopped for a long time, etc., damage to the second heat exchanger 32 can be suppressed. Also, since a space can be provided between the second heat exchanger 32 and the bottom wall portion 11a, the space makes it easier to perform work on the first discharge valve 61 and the second discharge valve 62. Therefore, the work of discharging the water W1, W2 from the first discharge valve 61 and the second discharge valve 62 can be easily performed. Thereby, the serviceability for the user can be improved.

[0083] Specifically, in the present embodiment, the first discharge valve 61 provided in the third pipe 53 protrudes from the third pipe 53 to below the second heat exchanger 32 in the vertical direction Z. Therefore, the discharge port of the first discharge valve 61 can be positioned below the second heat exchanger 32 in the vertical direction Z, and the water W1 in the second heat exchanger 32 can be preferably discharged from the first discharge valve 61.

[0084] Also, specifically, in the present embodiment, the first pipe 51 has a portion located below the second heat exchanger 32 in the vertical direction Z. A second discharge valve 62 is provided in the portion of the first pipe 51 that is located below the second heat exchanger 32 in the vertical direction Z. Therefore, the discharge port of the second discharge valve 62 can be positioned below the second heat exchanger 32 in the vertical direction Z, and the water W2 in the second heat exchanger 32 can be preferably discharged from the second discharge valve 62.

[0085] Further, according to the present embodiment, the first pipe 51 is a pipe that constitutes a part of the second circulation path portion 82. Therefore, the connection work of each pipe to the second heat exchanger 32 for heating the water W2 in the tank 12 can be facilitated. In addition, the components that constitute the second circulation path portion 82 tend to be fewer than the components that constitute the first circulation path portion 81, and it is easy to modularize almost the entire part. Therefore, by holding the first pipe 51 that constitutes a part of the second circulation path portion 82, the second pump 15b connected by the first pipe 51, and the second heat exchanger 32 by the holding member 41, the hot water supply circuit module 40 can be preferably made as in the present embodiment, and the assemblability of the hot water supply machine 100 can be more preferably improved.

[0086] Further, according to the present embodiment, the holding member 41 holds a second pipe 52 that constitutes a part of the second circulation path portion 82. The second pipe 52 connects the second pump 15b and the tank 12. Therefore, when the holding member 41 is fixed to the housing 11, by connecting the second pipe 52 to the tank 12, each component held by the holding member 41 can also be supported by the connection portion between the second pipe 52 and the tank 12. Thereby, the state in which each component is held with respect to the holding member 41 in the housing 11 can be preferably maintained.

[0087] Further, according to the present embodiment, the first pipe 51 has a capture pipe portion 16 in which the capture material 16a is housed inside. The capture pipe portion 16 is likely to be larger than other pipes. Therefore, by holding the capture pipe portion 16 together with the second heat exchanger 32 by the holding member 41, when connecting each pipe to the second heat exchanger 32 in the housing 11, it is possible to suppress the relatively large capture pipe portion 16 from getting in the way. Thereby, the assemblability of the water heater 100 can be more suitably improved.

[0088] Also, according to the present embodiment, the first pipe 51, the second pump 15b, and the second pipe 52 are arranged in a straight line in the vertical direction Z. Therefore, it is easy to simplify the shapes of the first pipe 51 and the second pipe 52.

[0089] Although the embodiments in the present disclosure have been described above, the present disclosure is not limited only to the configurations of the above-described embodiments, and the following configurations and methods can also be adopted.

[0090] The holding member only needs to hold the first pipe, the pump connected to the first pipe, and the heat exchanger connected to the pump by the first pipe. The second pipe does not have to be held, or any other components may be held. The shape of the holding member may be any shape as long as it can hold each component. Each component held by the holding member may be held in any manner with respect to the holding member. The holding member may be fixed to the housing in any manner. The first pipe held by the holding member may be a pipe constituting a part of the first circulation path portion. In this case, the pump held by the holding member is a pump provided in the first circulation path portion. Also, in this case, the third pipe provided with the first discharge valve is a pipe constituting a part of the second circulation path portion. The first pipe does not have to have a capture pipe portion.

[0091] In the heat exchanger held by the holding member, the plurality of connection ports may face different directions from each other. The heat exchanger may be disposed in contact with the bottom wall portion of the housing. The first circulation path portion may be a path portion through which the refrigerant flows through the outdoor unit. For example, in the above-described embodiment, the third circulation path portion 83 may pass through the second heat exchanger 32 without providing the first circulation path portion 81 and the first heat exchanger 31. In this case, the third circulation path portion 83 corresponds to the "first circulation path portion" passing through the heat exchanger. The first discharge valve and the second discharge valve may be arranged in any manner or may not be provided.

[0092] As described above, each configuration and each method described in this specification can be appropriately combined within a range that does not conflict with each other.

Explanation of Reference Numerals

[0093] 11... housing, 11a... bottom wall portion, 12... tank, 15b... second pump (pump), 16... capture pipe portion, 16a... capture material, 32... second heat exchanger (heat exchanger), 32b, 32c, 32d, 32e... connection ports, 41... holding member, 41c... abutting portion, 41h, 41i... clamping portions, 51... first pipe, 52... second pipe, 53... third pipe, 61... first discharge valve, 62... second discharge valve, 81... first circulation path portion, 82... second circulation path portion, 100... water heater, Z... vertical direction

Claims

1. A housing, a tank housed inside the housing, a heat exchanger housed inside the housing, a first circulation path portion passing through the heat exchanger, a second circulation path portion passing through the tank and the heat exchanger, a pump connected to a first pipe that forms part of one of the first circulation path portion and the second circulation path portion, a holding member fixed to the housing, comprising: The holding member holds the first pipe, the pump, and the heat exchanger connected to the pump by the first pipe, The holding member extends vertically upward from the bottom wall portion of the housing, The first pipe, the pump, and the heat exchanger are arranged to face in a direction intersecting the vertical direction with respect to the holding member. A water heater.

2. The heat exchanger has four connection ports to which two pipes forming part of the first circulation path portion and two pipes forming part of the second circulation path portion are respectively connected, The four connection ports are in a direction intersecting the vertical direction and open in the same direction as each other. The water heater according to claim 1.

3. The holding member has a pair of clamping portions that clamp and hold the heat exchanger in the vertical direction. The water heater according to claim 1 or 2.

4. The holding member has an abutting portion against which the heat exchanger is abutted in a direction intersecting the vertical direction. The water heater according to any one of claims 1 to 3.

5. The heat exchanger is arranged at a position vertically above and away from the bottom wall portion of the housing. The water heater according to any one of claims 1 to 4.

6. A third pipe forming part of the other circulation path portion of the first circulation path portion and the second circulation path portion is connected to the heat exchanger, A first discharge valve is provided in the third pipe, The first discharge valve protrudes from the third pipe to a position vertically below the heat exchanger. The water heater according to claim 5.

7. The first pipe has a portion located vertically below the heat exchanger, A second discharge valve is provided in a portion of the first pipe that is located vertically below the heat exchanger. The water heater according to claim 5 or 6.

8. The first pipe is a pipe forming part of the second circulation path portion. The water heater according to any one of claims 1 to 7.

9. A second pipe forming part of the second circulation path portion is held by the holding member, The hot water supply apparatus according to claim 8, wherein the second pipe connects the pump and the tank.

10. The hot water supply apparatus according to any one of claims 1 to 9, wherein the first pipe has a capture pipe portion in which a capture material is accommodated.

Images