WO2023181337A1

WO2023181337A1 - Water heater

Info

Publication number: WO2023181337A1
Application number: PCT/JP2022/014290
Authority: WO
Inventors: 嵩朗廣▲瀬▼
Original assignee: 三菱電機株式会社
Priority date: 2022-03-25
Filing date: 2022-03-25
Publication date: 2023-09-28

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

water heater

The present disclosure relates to a water heater.

For example, Patent Document 1 describes a water heater (water heater) in which a hot water supply heat exchanger is fixed to the bottom of a case (casing).

Japanese Patent Application Publication No. 2002-022271

In the hot water supply device as described above, it is necessary to connect a plurality of pipes to the hot water supply heat exchanger inside the case. Therefore, other parts of the hot water supply device may get in the way, making it difficult to connect the plurality of pipes to the hot water supply heat exchanger. Therefore, it was sometimes difficult to assemble the water heater.

In view of the above circumstances, one of the objects of the present disclosure is to provide a water heater having a structure that can improve ease of assembly.

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, and a water heater passing through the heat exchanger. a first circulation path section, a second circulation path section passing through the tank and the heat exchanger, and a part of one of the first circulation path section and the second circulation path section. a pump connected to the first piping, and a holding member fixed to the housing, the holding member including the first piping, the pump, and the pump connected to the pump by the first piping. The heat exchanger is held.

According to the present disclosure, the ease of assembling a water heater can be improved.

FIG. 1 is a diagram schematically showing a water heater in an embodiment. It is a perspective view showing a water heater body in an embodiment. FIG. 2 is a perspective view showing the main body of the water heater with the front wall section removed in the embodiment. FIG. 2 is a perspective view showing a part of the water heater main body with the front wall section removed in the embodiment. It is a perspective view showing a part of the main body of the water heater in a state where the front wall part and the right wall part in the embodiment are removed. It is a perspective view showing a hot water supply circuit module in an embodiment. It is an exploded perspective view showing a hot water supply circuit module in an embodiment. It is a perspective view showing a part of a bottom wall part of a case, a part of a tank, and a hot water supply circuit module in an embodiment. FIG. 3 is a perspective view showing a part of the procedure for assembling the hot water supply circuit module in the embodiment.

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 modified within the scope of the technical idea of the present disclosure. Further, in the following drawings, in order to make each structure easier to understand, the scale and number of each structure may be different from the scale and number of the actual structure.

Additionally, the drawings appropriately indicate an X axis, a Y axis, and a Z axis. The X-axis indicates one of the horizontal directions. The Y axis indicates the other horizontal direction. The Z axis indicates the vertical direction. In the following explanation, the horizontal direction along the X-axis will be referred to as the "back-and-forth direction ”. The front-rear direction X, the left-right direction Y, and the vertical direction Z are directions that are orthogonal to each other. In the following explanation, the side of the vertical direction Z that the Z-axis arrow points to (+Z side) is referred to as the upper side, and the side of the vertical direction Z that is opposite to the side that the Z-axis arrow points to (-Z side) is referred to as the lower side. do. Further, in the front-rear direction X, the side toward which the X-axis arrow points (+X side) is the front side, and in the front-rear direction X, the side opposite to the side toward which the X-axis arrow points (-X side) is the rear side. Further, the left-right direction Y is the left-right direction when the water heater main body 10 of the following embodiment is viewed from the front side (+X side). In other words, the side of the left-right direction Y that the Y-axis arrow points to (+Y side) is the right side, and the side of the left-right direction Y that is opposite to the side that the Y-axis arrow points to (-Y side) is the left side.

FIG. 1 is a diagram schematically showing a water heater 100 in this embodiment. The water heater 100 of this embodiment shown in FIG. 1 is a heat pump water heater. As shown in FIG. 1, the water heater 100 includes a water heater main body 10 and an outdoor unit 20. The water heater 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. Examples of the refrigerant R include a fluorine-based refrigerant or a hydrocarbon-based refrigerant that has a low global warming potential (GWP). Although not shown, the outdoor unit 20 includes a heat exchanger and a compressor that circulates the refrigerant R within the third circulation path section 83.

FIG. 2 is a perspective view showing the water heater main body 10. As shown in FIG. 2, the water heater main body 10 has a substantially rectangular parallelepiped shape that is long in the vertical direction Z. As shown in FIG. The water heater 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.

The housing 11 includes 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), and a left wall portion 11c located on the left side (-Y side). It has a wall portion 11d, 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 bodies from each other.

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.

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

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

As shown in FIG. 1, the water heater main body 10 includes a tank 12, a first heat exchanger 31, a second heat exchanger 32, a first circulation path section 81, a second circulation path section 82, and a heater. 13, a three-way valve 14, a first pump 15a, a second pump 15b, and a control section 17. Tank 12, first heat exchanger 31, second heat exchanger 32, first circulation path section 81, second circulation path section 82, heater 13, three-way valve 14, first pump 15a, second pump 15b, and control The section 17 is housed inside the housing 11.

The first circulation path section 81 is a path section through which water W1 circulates. The first circulation path portion 81 passes through the second heat exchanger 32 . The first circulation path section 81 is provided with a first pump 15a that circulates water W1 within the first circulation path section 81.

The second circulation path section 82 is a path section through which water W2 circulates. The water W2 flowing within the second circulation path section 82 is, for example, the same type of water as the water W1 flowing within the first circulation path section 81. Note that the water W2 flowing within the second circulation path section 82 may be a different type of water from the water W1 flowing within the first circulation path section 81. Furthermore, the liquid flowing within the second circulation path section 82 may not be water. The second circulation path section 82 passes through the tank 12 and the second heat exchanger 32. The second circulation path section 82 is provided with a second pump 15b that circulates water W2 within the second circulation path section 82.

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

As shown in FIGS. 3 to 5, the tank 12 has a cylindrical shape extending in the vertical direction Z. The tank 12 stores water W2 therein. The inside of the tank 12 is sealed. For example, the entire interior of the tank 12 is filled with water W2. Note that while the water heater 100 is in operation, the water W2 stored inside the tank 12 is heated and becomes 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 contained in the tank 12 from decreasing.

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 water W2 into the tank 12. One end of the water supply pipe 12a is connected to the lower part of the tank 12, for example. The other end of the water supply pipe 12a projects upward from the top wall 11b of the housing 11 and is connected to a water pipe (not shown).

A hot water supply pipe 12b is connected to the tank 12. The hot water supply pipe 12b is a pipe for discharging water W2 inside the tank 12 to the outside of the tank 12. Water W2 discharged from the hot water supply pipe 12b to the outside of the tank 12 is heated and becomes hot water. One end of the hot water supply pipe 12b is connected to the upper part of the tank 12, for example. The other end of the hot water supply pipe 12b protrudes upward from the top wall 11b of the housing 11, and is connected to, for example, a pipe connected to a faucet used by the user. For example, when the user opens the faucet, water W2 that becomes hot water flows through the hot water supply pipe 12b, joins with unheated tap water, reaches the temperature set by the user, and then flows out of the opened faucet. It is discharged.

As shown in FIGS. 4 and 5, the first heat exchanger 31 and the second heat exchanger 32 are located in 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 portion inside the housing 11 . The second heat exchanger 32 is located at the front and right (+Y side) end of the lower portion inside the housing 11 . The first heat exchanger 31 and the second heat exchanger 32 are arranged facing each other with an interval 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 may be heat exchangers of a type other than a plate type. The second heat exchanger 32 will be explained in detail later.

The refrigerant R flowing through the third circulation path part 83 shown in FIG. pass inside. The water W1 flowing within the first circulation path section 81 absorbs heat from the refrigerant R in the first heat exchanger 31. Thereby, the water W1 passing through the first heat exchanger 31 is warmed and becomes hot water. The heated water W1 passes through the second heat exchanger 32. Of 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. Thereby, the water W2 passing through the second heat exchanger 32 is warmed 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 from the tank 12 via the hot water supply pipe 12b.

When a portion of the water W2 is discharged to the outside of the tank 12 via 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. By using a remote controller (not shown), the user can set the water heater 100 to a hot water supply mode in which water W2 in the tank 12 is heated.

Additionally, the user can use the heat of the water W1 in the first circulation path section 81 warmed by the refrigerant R for indoor heating. Specifically, by switching the three-way valve 14 provided in the first circulation path section 81, water W1 flowing inside the first circulation path section 81 flows through a pipe (not shown) connected to the water heater main body 10. The water then flows to an indoor heating device such as a radiator placed outside the water heater main body 10. The water W1 that has flowed into the indoor heating device flows into the water heater main body 10 again and returns into the first circulation path section 81.

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 if 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.

A control unit 17 is housed inside the housing 11 at its upper end. 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.

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 inside the housing 11 on the front side (+X side) of the tank 12 . In this embodiment, the hot water supply circuit module 40 is located at the front and right (+Y side) end of the lower portion inside the housing 11 . The hot water supply circuit module 40 is covered from the right side by the right plate part 11f of the right wall part 11e, and is covered from the front side by the front wall part 11c.

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 portion of the bottom wall portion 11a of the housing 11, a portion 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.

The holding member 41 is a member that holds each component of the hot water supply circuit module 40. The holding member 41 holds a first pipe 51, a second pump 15b, a second pipe 52, and a second heat exchanger 32. In this embodiment, the holding member 41 is a sheet metal member made by pressing a sheet metal. 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. A lower end portion of the holding member 41 is fixed to the bottom wall portion 11a. More specifically, the lower end of the holding member 41 is fixed to the corner 11j of the frame 11i with 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 corners of the substantially square frame-shaped frame portion 11i.

As shown in FIG. 7, the holding member 41 includes a first holding plate part 41a, a second holding plate part 41b, an abutment part 41c, a first upper flange part 41p, a second upper flange part 41q, It has a pair of clamping parts 41h, 41i, fixed

parts

41e, 41f, 41g, and a bent part 41d.

The first holding plate portion 41a has 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 perpendicular to the left-right direction Y. As shown in FIG. 8, a protrusion 41r that protrudes downward is formed at the front end of the lower end of the first holding plate 41a. The protruding portion 41r is placed overlappingly on 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 protrusion 41r is fixed to the front end of the right side portion of the frame 11i with a bolt 90.

As shown in FIG. 7, the second holding plate part 41b is connected to the rear (-X side) edge of the first holding plate part 41a. The second holding plate portion 41b has 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 in the front-rear direction X with respect to the left-right direction Y. The plate surface of the second holding plate portion 41b is located on the left side (-Y side) as you go toward the rear side (-X side). The second holding plate portion 41b projects rearward and leftward from the rear edge of the first holding plate portion 41a.

Among the plate surfaces of the first holding plate portion 41a, the surface facing the left side (-Y side) is the first opposing surface 41u. Among the plate surfaces of the second holding plate portion 41b, the left side and the surface facing the front side (+X side) 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 inside the housing 11.

The abutment portion 41c protrudes to the left (−Y side) from the front (+X side) edge of the first holding plate portion 41a. The abutting portion 41c has 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 perpendicular to the front-rear direction X. The left end of the abutting portion 41c is located on the right side (+Y side) of the left end of the second holding plate portion 41b. As shown in FIG. 8, the lower end portion of the abutting portion 41c is arranged to overlap with 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 abutment portion 41c is fixed to the right end portion of the front portion of the frame portion 11i with a bolt 90.

As shown in FIG. 4, the flange portion 11g of the right wall portion 11e of the housing 11 is placed on 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 with a plurality of bolts. In this embodiment, the abutment portion 41c is fixed to the flange portion 11g and the frame portion 11i, and the protrusion portion 41r formed at the lower end of the first holding plate portion 41a is fixed to the frame portion 11i. , a holding member 41 is fixed to the housing 11.

As shown in FIG. 7, the first upper flange portion 41p protrudes to the left (-Y side) from the upper end of the first holding plate portion 41a. The first upper flange portion 41p has a substantially rectangular plate shape 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 to the left and front side (+X side) from the upper end portion of the second holding plate portion 41b. The second upper flange portion 41q has a substantially rectangular plate shape that extends in the direction in which the second holding plate portion 41b extends when viewed in the vertical direction Z. The plate surface of the second upper flange portion 41q faces the vertical direction Z.

The pair of holding parts 41h and 41i are formed on the first opposing surface 41u of the first holding plate part 41a. The pair of holding parts 41h and 41i protrude to the left (-Y side) from the first opposing surface 41u. In this embodiment, the pair of holding parts 41h and 41i have a rectangular plate shape with plate surfaces facing in the vertical direction Z. The pair of clamping parts 41h and 41i are arranged at intervals in the vertical direction Z. The holding part 41h is located above the holding part 41i. The protruding length of the holding part 41i with respect to the first opposing surface 41u is smaller than the protruding length of the holding part 41h with respect to the first opposing surface 41u. In this embodiment, the protruding length of the pair of clamping parts 41h, 41i is the dimension of the pair of clamping parts 41h, 41i in the left-right direction Y. In this embodiment, the pair of holding parts 41h and 41i are made by cutting and raising a part of the first holding plate part 41a to the left. As shown in FIG. 6, the pair of holding parts 41h and 41i hold the second heat exchanger 32 between them in the vertical direction Z.

As shown in FIG. 7, the fixing

parts

41e, 41f, and 41g are provided on the second holding plate part 41b. The fixing part 41e, the fixing part 41f, and the fixing part 41g are arranged side by side in this order from the top to the bottom at intervals in the vertical direction Z. The fixing part 41e and the fixing part 41f are located above the holding part 41h. The fixing part 41g is located below the holding part 41i. The fixing portion 41e is connected to the left (−Y side) and front (+X side) edges of the second upper flange portion 41q. The fixed portion 41f and the fixed portion 41g are connected to the second opposing surface 41v. In this embodiment, the fixing part 41f and the fixing part 41g are made by cutting and raising a part of the second holding plate part 41b. The fixing

portions

41e, 41f, and 41g have a substantially rectangular plate shape. The plate surfaces of the fixing

portions

41e, 41f, and 41g face the same direction as the second opposing surface 41v. The fixing

portions

41e, 41f, and 41g extend in a direction perpendicular to both the second opposing surface 41v and the vertical direction Z.

The bent portion 41d protrudes to the left (−Y side) from a portion of the lower end portion of the first holding plate portion 41a located on the rear side (−X side) of the protruding portion 41r. The bent portion 41d includes a first portion 41j that protrudes to the left from the lower end of the first holding plate portion 41a, a second portion 41k that protrudes downward from the left end of the first portion 41j, and a second portion 41k that protrudes from the left end of the first holding plate portion 41a. 41 m of 3rd parts which protrude to the left side from a lower end part. 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 arranged on the bottom plate portion 11h of the bottom wall portion 11a.

As shown in FIG. 7, the second heat exchanger 32 includes a substantially rectangular parallelepiped heat exchanger body 32a extending in the vertical direction Z, and four

connection ports

32b, 32c formed in the heat exchanger body 32a. , 32d, 32e. In this embodiment, the heat exchanger main body 32a has a rectangular shape with rounded corners and has 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 part 32a is held between a pair of clamping parts 41h and 41i in the vertical direction Z. 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 clamping parts 41h and 41i are in contact with the heat exchanger main body part 32a via the cushioning material.

The second heat exchanger 32 is held by the first holding plate part 41a via a pair of holding parts 41h and 41i. The second heat exchanger 32 is disposed opposite to the left side (−Y side) of the first opposing surface 41u of the first holding plate portion 41a. That is, the second heat exchanger 32 is arranged 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 holding parts 41h and 41i. In the present embodiment, the second heat exchanger 32 is disposed apart above the bottom wall portion 11a of the housing 11 in the vertical direction Z.

The right side (+Y side) surface of the second heat exchanger 32 is in contact with the first opposing 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 of the front end portion of the heat exchanger main body portion 32a is abutted against the abutment 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.

The four

connection ports

32b, 32c, 32d, and 32e are formed on the left (-Y side) surface of the heat exchanger main body 32a. In this embodiment, the four

connection ports

32b, 32c, 32d, and 32e have a cylindrical shape that protrudes to the left from the heat exchanger main body 32a. The four

connection ports

32b, 32c, 32d, and 32e are open to the left (-Y direction). In other words, the four

connection ports

32b, 32c, 32d, and 32e are open in the same direction, intersecting the vertical direction Z.

The connection port 32b is formed at the lower and front (+X side) corner of the left (-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 a lower and rear corner of the left side surface of the heat exchanger main body 32a. Two pipes forming part of the first circulation path part 81 and two pipes forming part of the second circulation path part 82 are connected to the four

connection ports

32b, 32c, 32d, and 32e, respectively. has been done.

As shown in FIG. 4, a third pipe 53 that constitutes 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 (+Y side) end of the third pipe 53 is connected to the connection port 32b.

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 in the vertical direction Z with respect to the front-rear direction X. The first discharge valve 61 projects forward (+X side) and downward from the third pipe 53 . The tip of the first discharge valve 61 is located in front of and below the second heat exchanger 32 . That is, the first discharge valve 61 protrudes from the third pipe 53 to a position lower than the second heat exchanger 32 in the vertical direction Z. By opening the first discharge valve 61, at least a portion of the water W1 in the first circulation path section 81 can be discharged to the outside of the water heater 100 via the first discharge valve 61. In this embodiment, the water W1 in the portion of the first circulation path section 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.

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

As shown in FIG. 4, a fourth pipe 54 that constitutes a part of the second circulation path section 82 is connected to the connection port 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 32d.

As shown in FIG. 6, the first pipe 51 that constitutes a part of the second circulation path section 82 is connected to the connection port 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 part 51a, a capture pipe part 16, and an upper pipe part 51b. In the present embodiment, the first pipe 51 is configured by connecting a lower pipe part 51a, a capture pipe part 16, and an upper pipe part 51b in this order from the bottom to the top.

The lower piping section 51a is connected to the connection port section 32e. The lower piping portion 51a includes a first portion 51c extending to the left (-Y side) from the connection port 32e, a second portion 51d extending downward from the left end of the first portion 51c, and a lower end of the second portion 51d. It has a third portion 51e extending from the right side (+Y side) and 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 piping 51 located below the second heat exchanger 32 in the vertical direction Z. be. A rubber member 71 is attached to the outer peripheral surface of the fourth portion 51f. The rubber member 71 surrounds a portion of the fourth portion 51f.

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 in the left-right 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 to the right side (+Y side). In this embodiment, the second discharge valve 62 protrudes in a direction perpendicular 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 portion of the water W2 in the second circulation path section 82 can be discharged to the outside of the water heater 100 via the second discharge valve 62. In this embodiment, the water W2 in the portion of the second circulation path portion 82 that passes through the second heat exchanger 32 can be discharged to the outside of the water heater 100 via the second discharge valve 62.

As shown in FIG. 7, the capture piping section 16 is connected to the upper end of the fourth portion 51f of the lower piping section 51a. The capture piping section 16 extends in the vertical direction Z. The inner and outer diameters of the capture piping section 16 are larger than the inner and outer diameters of the lower piping section 51a and the inner and outer diameters of the upper piping section 51b. A trapping material 16a is accommodated inside the trapping piping section 16. The capture material 16a is spherical. In this embodiment, a plurality of trapping materials 16a are arranged in line in the vertical direction Z inside the trapping piping section 16.

The capture material 16a is made of metal. Examples of metals constituting the trapping material 16a include various types of stainless steel, 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 composed of, for example, a plurality of spirally extending metal fibers intertwined with each other. The plurality of metal fibers are made of metal or the like that constitutes the capturing material 16a described above. Since the capture material 16a is composed of a plurality of spirally extending metal fibers intertwined, gaps are provided between the metal fibers. The proportion occupied by the voids in the spherical capture 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 inside the trapping piping section 16 can pass through the trapping material 16a with almost no resistance.

When the water W2 flowing through the second circulation path section 82 flows into the trapping piping section 16 and comes into contact with the trapping material 16a, components such as calcium carbonate contained in the water W2 precipitate and adhere to the trapping material 16a. . A substance formed by precipitating components such as calcium carbonate contained in the water W2 is called scale. For example, scale has calcium carbonate as a main component. The higher the hardness of water W2, the more calcium carbonate components contained in water W2. Therefore, scale is more likely to precipitate when the water W2 is hard water than when the water W2 is soft water.

The scale adheres to the surface of the metal fibers that constitute the trapping material 16a. When water W2 comes into contact with the part of the trapping material 16a to which the scale has adhered in a state where scale is attached to the trapping material 16a, crystal growth occurs starting from the scale attached to the trapping material 16a. Thereby, the precipitation of scale in the trapping material 16a is accelerated, and the scale components in the water W2 can be suitably attached to the trapping material 16a. In this way, the scale components in the water W2 can be captured by the capture material 16a in the capture piping section 16, so that the scale components are formed on the inner surface of the tank 12 through which the second circulation path section 82 passes, the inner surface of the second heat exchanger 32, etc. adhesion can be suppressed.

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

As shown in FIG. 6, the first pipe 51 is held by a holding member 41. More specifically, the first pipe 51 is held by the holding member 41 by fixing the lower pipe part 51a and the upper pipe part 51b to the holding member 41, respectively. The first pipe 51 is arranged to face the front side (+X side) of the second opposing surface 41v of the second holding plate portion 41b. In other words, the first pipe 51 is arranged to face the holding member 41 in a direction intersecting the vertical direction Z. The capture piping section 16 is arranged side by side on the rear side (-X side) of the second heat exchanger 32.

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 piping portion 51a is fixed to the fixing portion 41g by a fixing fitting 40c. The fixing fitting 40c is fixed to the fixing part 41g with two bolts, and the fourth part 51f of the lower piping part 51a is sandwiched between the fixing part 41g and the fixing part 41g. The fixing fitting 40c fixes the portion of the fourth portion 51f to which the rubber member 71 is attached to the fixing portion 41g by sandwiching it between the fixing member 40c and the fixing portion 41g.

The upper piping part 51b is fixed to the fixing part 41f by a fixing fitting 40b. The fixing fitting 40b is fixed to the fixing part 41f with two bolts, and holds the upper piping part 51b between the fixing part 41f and the fixing part 41f. The fixing fitting 40b secures the portion of the upper piping portion 51b to which the rubber member 72 is attached to the fixing portion 41f by sandwiching the portion between the fixing fitting 40b and the fixing portion 41f.

The holding member 41 holds a second pipe 52 that constitutes a 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 piping 52 has a first portion 52a extending upward from the second pump 15b, and a second portion 52b 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 to the rear (-X side) and to the left (-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 portion of the second portion 52b is connected to the connecting portion 12d protruding from the tank 12.

As shown in FIG. 9, the second pipe 52 is held by the holding member 41 by being fixed to the fixing part 41e by the fixing fitting 40a. The fixture 40a is fixed to the fixing part 41e with two bolts, and holds the second pipe 52 between it and the fixing part 41e. The fixture 40a secures the first portion 52a of the second pipe 52 to the fixture 41e by sandwiching it between the fixture 40a and the fixture 41e. A lower portion of the first portion 52a of the second pipe 52 is arranged to face 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.

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 this embodiment, the first pipe 51, the second pipe 52, and the second pump 15b are held by the second holding plate part 41b via fixing

parts

41e, 41f, and 41g. The second pump 15b is arranged facing the left side (-Y side) of the first holding plate part 41a and the front side (+X side) of the second holding plate part 41b. That is, the second pump 15b is arranged to face the holding member 41 in a direction intersecting the vertical direction Z.

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

The hot water supply circuit module 40 is installed in the housing 11 in an assembled state. As shown in FIG. 6, before being installed in the housing 11, the second heat exchanger 32 of the hot water supply circuit module 40 has a first pipe among four pipes connected to the second heat exchanger 32. Only 51 is connected.

The worker who assembles the water heater main body 10 assembles, for example, the parts of the water heater main body 10 excluding the right wall portion 11e of the housing 11, the front wall portion 11c of the housing 11, and the hot water supply circuit module 40. As shown in FIG. 8, the operator fixes the lower end of the holding member 41 to the bottom wall 11a to which the front wall 11c and the right wall 11e are not attached, and then attaches the right wall 11e to the bottom wall. 11a, and the flange portion 11g of the right wall portion 11e and the holding member 41 are fixed. The operator also 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 casing 11 in this manner, 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. Through the above steps, the water heater main body 10 is assembled.

Note that the method of assembling the water heater main body 10 is not limited to the method described above. For example, other parts 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, are assembled after the hot water supply circuit module 40 is fixed. It's okay to be hit.

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, the second heat exchanger 32 can be held in a state where the first piping 51 and the second pump 15b are connected to one holding member 41, so that the hot water supply circuit module of this embodiment 40, the first piping 51, the second pump 15b, and the second heat exchanger 32 can be combined into a module. Thereby, the first piping 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, there is no need 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 work of assembling the water heater 100 can be facilitated.

Furthermore, the first piping 51 can be connected to the second heat exchanger 32 before the second heat exchanger 32 is installed in the housing 11. Therefore, the number of pipes connected to the second heat exchanger 32 within the housing 11 can be reduced. Thereby, the number of man-hours required for connecting the pipes to the second heat exchanger 32 within the casing 11 can be reduced.

In addition, the holding member 41 holds the first piping 51 and the second pump 15b in addition to the second heat exchanger 32, so when the holding member 41 holds each component, the first piping 51 and the second pump 15b are held. It is easy to arrange the second pump 15b at a position where it does not interfere with the work of connecting piping to the second heat exchanger 32. As a result, when 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, the first pipe 51 and the second pump 15b can be prevented from getting in the way. Therefore, it is possible to easily connect the third pipe 53, the fourth pipe 54, and the fifth pipe 55 to the second heat exchanger 32 within the housing 11.

Furthermore, by holding the second heat exchanger 32 together with the first piping 51 and the second pump 15b in the holding member 41, it is not necessary to separately provide parts for attaching the second heat exchanger 32 to the housing 11. do not have. Therefore, the number of parts of the water heater 100 can be reduced by the number of parts. Furthermore, since it is not necessary to provide the component within the casing 11, it is easy to increase the work space when connecting the pipes to the second heat exchanger 32 within the casing 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 within the housing 11 can be performed more easily.

Furthermore, since the second heat exchanger 32 is held by the holding member 41, the second heat exchanger 32, together with the first piping 51 and the second pump 15b, can be placed closer to the end inside the housing 11. I can do it. Therefore, the shape of each pipe connected to the second heat exchanger 32 can be easily simplified, and each pipe can be easily connected to the second heat exchanger 32.

As described above, according to this embodiment, the ease of assembling the water heater 100 can be improved. More specifically, the assemblability of the water heater main body 10 of the water heater 100 can be improved.

Furthermore, 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 the holding member 41 in a direction intersecting the vertical direction Z. For example, when each component is held above the holding member 41 by holding the first piping 51, the second pump 15b, and the second heat exchanger 32 in a direction intersecting the vertical direction Z with respect to the holding member 41. Compared to this, the area for holding each component in the holding member 41 can be made larger. Thereby, each component can be stably held by the holding member 41. Further, each of the

connection ports

32b, 32c, 32d, and 32e of the second heat exchanger 32 can be easily opened in a direction intersecting the vertical direction Z. This makes it easier to connect each pipe to the second heat exchanger 32 inside the casing 11.

Further, according to the present embodiment, the second heat exchanger 32 includes two pipes forming a part of the first circulation path part 81 and two pipes forming a part of the second circulation path part 82. It has four

connection port portions

32b, 32c, 32d, and 32e connected to each other. The four

connection ports

32b, 32c, 32d, and 32e are oriented to intersect with the vertical direction Z and open in the same direction. Therefore, the third pipe 53, the fourth pipe 54, and the fifth pipe 55 can be connected from the same side to the second heat exchanger 32 in the housing 11. This makes it easier to connect each pipe to the second heat exchanger 32 inside the casing 11.

Furthermore, according to the present embodiment, the holding member 41 has a pair of holding parts 41h and 41i that hold the second heat exchanger 32 between them in the vertical direction Z. Therefore, the second heat exchanger 32 can be held by the holding member 41 while being positioned in the vertical direction Z with respect to the holding member 41. Further, it is easy to hold the second heat exchanger 32 upwardly from the bottom wall portion 11a of the housing 11 with respect to the holding member 41.

Further, according to the present embodiment, the protruding length of the holding portion 41i that supports the second heat exchanger 32 from below is longer than the protruding length of the holding portion 41h that supports the second heat exchanger 32 from above. small. Therefore, even if the mass of the second heat exchanger 32 is applied to the clamping part 41i, it is easy to reduce the bending moment that tends to bend the clamping part 41i downward. Thereby, the holding part 41i can be suppressed from bending downward, and the second heat exchanger 32 can be suitably supported from below by the holding part 41i.

Furthermore, 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 held by the holding member 41 while being positioned in a direction intersecting the vertical direction Z with respect to the holding member 41. In this 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.

Further, for example, when the operation of the water heater 100 is stopped for a long period of time and the temperature of the place where the water heater main body 10 is installed is relatively low, the water W1 and W2 in the second heat exchanger 32 may freeze. It may expand and damage the second heat exchanger 32. Therefore, when the operation of the water heater 100 is to be stopped for a long period of time, it is preferable to drain the water W1 and W2 from the second heat exchanger 32. Specifically, the first discharge valve 61 and the second discharge valve 62 are opened to discharge water W1 and 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, the first discharge valve 61 and the second discharge valve 62 are connected to the second heat exchanger 32. There is a possibility that the water W1 and W2 inside the tank cannot be sufficiently discharged. Therefore, it is preferable that the first discharge valve 61 and the second discharge valve 62 be arranged below the second heat exchanger 32. However, for example, if the second heat exchanger 32 is disposed in contact with the bottom wall portion 11a, the bottom wall portion 11a becomes an obstacle, and the first discharge valve 61 and the second discharge valve 62 are disposed between the second heat exchanger 32 and the second heat exchanger 32. There is a problem that it cannot be placed below 32.

On the other hand, according to the present embodiment, the second heat exchanger 32 is disposed further away from the bottom wall portion 11a of the housing 11 in the vertical direction Z. Therefore, the first discharge valve 61 and the second discharge valve 62 provided in the piping connected to the second heat exchanger 32 can be easily arranged below the second heat exchanger 32. Thereby, the water W1 and 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, damage to the second heat exchanger 32 can be suppressed when the operation of the water heater 100 is stopped for a long period of time. Further, since a space can be provided between the second heat exchanger 32 and the bottom wall portion 11a, the space makes it easy to work on the first discharge valve 61 and the second discharge valve 62. Become. Therefore, the work of discharging the water W1 and W2 from the first discharge valve 61 and the second discharge valve 62 can be easily performed. Thereby, serviceability for users can be improved.

Specifically, in the present embodiment, the first discharge valve 61 provided in the third pipe 53 protrudes from the third pipe 53 to a position lower than the second heat exchanger 32 in the vertical direction Z. Therefore, the discharge port of the first discharge valve 61 can be located lower than 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. can be discharged.

Moreover, specifically, in this 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 a portion of the first pipe 51 located below the second heat exchanger 32 in the vertical direction Z. Therefore, the discharge port of the second discharge valve 62 can be located lower than 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. can be discharged.

Further, according to the present embodiment, the first pipe 51 is a pipe that constitutes a part of the second circulation path section 82. Therefore, the work of connecting each pipe to the second heat exchanger 32 for warming the water W2 in the tank 12 can be facilitated. In addition, the number of parts constituting the second circulation path part 82 tends to be smaller than the parts constituting the first circulation path part 81, and it is easy to modularize almost the entire part. Therefore, by having the holding member 41 hold the first piping 51 that constitutes a part of the second circulation path section 82 and the second pump 15b and the second heat exchanger 32 that are connected by the first piping 51, the main The hot water supply circuit module 40 can be suitably manufactured as in the embodiment, and the ease of assembling the water heater 100 can be improved more suitably.

Further, according to the present embodiment, the second pipe 52 that constitutes a part of the second circulation path section 82 is held by the holding member 41. The second pipe 52 connects the second pump 15b and the tank 12. Therefore, when fixing the holding member 41 to the housing 11, by connecting the second pipe 52 to the tank 12, each part held by the holding member 41 can be attached to the connecting portion between the second pipe 52 and the tank 12. It can also be supported by Thereby, the state in which each component is held by the holding member 41 within the housing 11 can be suitably maintained.

Furthermore, according to the present embodiment, the first pipe 51 has the capture pipe section 16 in which the capture material 16a is housed. The capture piping section 16 tends to be larger than other piping. Therefore, by holding the capture piping part 16 together with the second heat exchanger 32 in the holding member 41, when connecting each pipe to the second heat exchanger 32 in the housing 11, the relatively large capture piping part 16 can be prevented from getting in the way. Thereby, the ease of assembling the water heater 100 can be more suitably improved.

Furthermore, 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, the shape of the first pipe 51 and the shape of the second pipe 52 can be easily simplified.

Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the configurations of each embodiment described above, and the following configurations and methods can also be adopted.

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, and does not need to hold the second pipe. However, any other parts may be retained. The holding member may have any shape as long as it can hold each component. Each component held by the holding member may be held by the holding member in any manner. The holding member may be fixed to the housing in any manner. The first pipe held by the holding member may be a pipe that constitutes a part of the first circulation path section. In this case, the pump held by the holding member is a pump provided in the first circulation path section. Moreover, in this case, the third pipe in which the first discharge valve is provided is a pipe that constitutes a part of the second circulation path section. The first piping does not need to have a capture piping section.

The plurality of connection ports in the heat exchanger held by the holding member may face in different directions. The heat exchanger may be placed in contact with the bottom wall of the housing. The first circulation path portion may be a path portion through which the refrigerant flows inside the outdoor unit. For example, in the embodiment described above, the first circulation path section 81 and the first heat exchanger 31 may not be provided, and the third circulation path section 83 may pass through the second heat exchanger 32. In this case, the third circulation path section 83 corresponds to a "first circulation path section" that passes through the heat exchanger. The first discharge valve and the second discharge valve may be arranged in any manner, or may not be provided.

As described above, each structure and each method described in this specification can be combined as appropriate within a mutually consistent range.

DESCRIPTION OF SYMBOLS 11... Housing, 11a... Bottom wall part, 12... Tank, 15b... 2nd pump (pump), 16... Capture piping part, 16a... Capture material, 32... 2nd heat exchanger (heat exchanger), 32b, 32c, 32d, 32e... Connection port portion, 41... Holding member, 41c... Abutting portion, 41h, 41i... Clamping portion, 51... First piping, 52... Second piping, 53... Third piping, 61... First Discharge valve, 62...Second discharge valve, 81...First circulation path section, 82...Second circulation path section, 100...Water heater, Z...Vertical direction

Claims

A casing and
a tank housed inside the housing;
a heat exchanger housed inside the housing;
a first circulation path section passing through the heat exchanger;
a second circulation path section 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 section and the second circulation path section;
a holding member fixed to the housing;
Equipped with
The water heater, wherein 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 of the housing,
The water heater according to claim 1, wherein the first pipe, the pump, and the heat exchanger are arranged to face the holding member in a direction intersecting a vertical direction.
The heat exchanger has four connection ports to which two pipes forming a part of the first circulation path part and two pipes forming a part of the second circulation path part are respectively connected. death,
The water heater according to claim 2, wherein the four connection ports are oriented to intersect with the vertical direction and open in the same direction.
The water heater according to claim 2 or 3, wherein the holding member has a pair of clamping parts that vertically sandwich and hold the heat exchanger.
The water heater according to any one of claims 2 to 4, wherein the holding member has an abutting portion against which the heat exchanger abuts in a direction intersecting the vertical direction.
The water heater according to any one of claims 2 to 5, wherein the heat exchanger is disposed vertically upward and away from the bottom wall of the casing.
A third pipe constituting a part of the other of the first circulation route section and the second circulation route section is connected to the heat exchanger,
The third pipe is provided with a first discharge valve,
The water heater according to claim 6, wherein the first discharge valve protrudes from the third pipe to a vertically lower side than the heat exchanger.
The first pipe has a portion located vertically lower than the heat exchanger,
8. The water heater according to claim 6, wherein a second discharge valve is provided in a portion of the first piping located vertically below the heat exchanger.
The water heater according to any one of claims 1 to 8, wherein the first pipe is a pipe that constitutes a part of the second circulation path section.
A second pipe constituting a part of the second circulation path section is held by the holding member,
The water heater according to claim 9, wherein the second pipe connects the pump and the tank.
The water heater according to any one of claims 1 to 10, wherein the first pipe has a capture pipe section in which a capture material is housed.