JP2009293855A - Heat pump water heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat pump water heater for performing a boiling-up operation of high efficiency without degrading operation efficiency (coefficient of performance) of a heat pump cycle. <P>SOLUTION: This heat pump water heater includes a heat pump unit 1 having the heat pump cycle, a tank unit 2 having a hot water storage tank for storing hot water/water, water-side piping 11 for circulating the hot water/water distributed from the tank unit 2 to the heat pump unit 1, hot water-side piping 12 for circulating the hot water/water distributed from the heat pump unit 1 to the tank unit 2, and a heat pump hot water-side connecting means for connecting the hot water-side piping 12 and the heat pump unit 1, a part of a housing 17 of the heat pump unit 1 includes the projecting shape 24, and the heat pump hot water-side connecting means is disposed on the housing 17 through the projecting shape 24. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a heat pump water heater that stores hot water boiled by a heat pump in a hot water storage tank and can be used for hot water supply.

  Conventionally, there is a heat pump water heater as shown in FIG. 5 that can use hot water boiled by a heat pump for hot water supply. As shown in FIG. 5, the heat pump water heater is configured by connecting a heat pump unit 101 and a tank unit 102 with a water side pipe 111 and a hot water side pipe 112 (see, for example, Patent Document 1).

  Water supplied from an external water pipe is supplied to the bottom of the hot water storage tank 108 of the tank unit 102, and when the hot water in the hot water storage tank 108 is heated, the low temperature water at the bottom of the hot water storage tank 108 drives the water pump 109. By doing so, it is conveyed to the hot water supply heat exchanger 104 in the heat pump unit 101. The hot water supply heat exchanger 104 exchanges heat with the high-temperature refrigerant to form high-temperature hot water, and then is stored as hot water in the hot water storage tank 108 from the heat pump unit through the hot water side pipe 112.

  FIG. 6 is a connection diagram of the heat pump unit and the tank unit described in Non-Patent Document 1. As shown in FIG. 6, adapters 120a and 120b are attached to the other end of the water side pipe 111 and the hot water side pipe 112, one end of which is connected to the tank unit 102, and is mounted on the heat pump unit 101 to generate high temperature water. The connection port 121a is attached to the low temperature side end part of the flow path through which the hot water of the hot water supply heat exchanger 104 is connected, and the connection port 121b is attached to the high temperature side end part. Then, by connecting the connection port 121a (121b) and the adapter 120a (120b), the water side pipe 111 and the hot water side pipe 112 can be connected to the heat pump unit 101 and combined with the water circuit of the tank unit 102. (For example, refer nonpatent literature 1).

FIG. 7 is an enlarged view of part A in FIG. 6, and shows a view in which the connection port 121 a (121 b) is attached to the housing of the heat pump unit 101. As shown in FIG. 7, in the conventional heat pump water heater, the connection port 121 a (121 b) is directly attached to the housing of the heat pump unit 101.
JP 2008-25947 A National heat pump water heater (system product number: HE-D37AYS) construction manual, Matsushita Electric Industrial Co., Ltd., 2007, p. 14

  However, when the connection port 121b is directly attached to the housing of the heat pump unit as in the conventional heat pump water heater, the heat of the high-temperature hot water generated by the hot water supply heat exchanger is radiated to the outside from the connection port 121b. In addition, since the connection port 121b and the housing of the heat pump unit are in contact with each other, not only heat is radiated from the connection port 121b to the outside air, but also heat is conducted to the housing of the heat pump unit. Heat is radiated from the unit housing to the outside air.

And as shown in FIG. 6, since it arrange | positions so that the low temperature side connection port 121a and the high temperature side connection port 121b attached to the heat pump unit 101 may become the vicinity, from the high temperature side connection port 121b The radiated heat is transmitted to the low temperature side connection port 121a through the housing of the heat pump unit 101, and as a result, the temperature of the low temperature water supplied to the hot water supply heat exchanger 104 is increased.

  However, there is a problem that the operating efficiency (COP) of the heat pump cycle is lowered when the temperature of the hot water supplied to the hot water supply heat exchanger 104 is increased because the water heater uses the heat pump as a heat source. Was.

  An object of the present invention is to solve the conventional problems described above, and to provide a heat pump water heater that can perform a high-efficiency boiling operation without reducing the operation efficiency (COP) of the heat pump cycle.

  In order to solve the above-described conventional problems, a heat pump water heater of the present invention includes a heat pump unit having a heat pump cycle, a tank unit having a hot water storage tank for storing hot water, and hot water sent from the tank unit to the heat pump unit. Water side piping, hot water side piping through which hot water sent from the heat pump unit to the tank unit circulates, and heat pump hot water side connection means for connecting the hot water side piping and the heat pump unit, A contact area where the heat pump hot water side connecting means touches the housing of the heat pump unit by forming a part of the housing into a convex shape and the heat pump hot water side connecting means being disposed on the housing via the convex shape. The heat pump hot water from high temperature hot water Through the connecting means can be reduced the amount of heat released to the housing of the heat pump unit, therefore, it is possible to improve the operating efficiency of the heat pump cycle.

  In order to solve the conventional problems, a heat pump water heater of the present invention includes a heat pump unit having a heat pump cycle, a tank unit having a hot water storage tank for storing hot water, and hot water sent from the tank unit to the heat pump unit. A water side pipe through which the hot water flows from the heat pump unit to the tank unit, and a heat pump hot water side connection means for connecting the hot water side pipe and the heat pump unit. A part of the hot water side connecting means has a convex shape, and the heat pump hot water side connecting means is disposed on the casing through the convex shape, so that the heat pump hot water side connecting means touches the casing of the heat pump unit. Since the contact area can be reduced, heat pump Through the hot water side connecting means can be reduced the amount of heat released to the housing of the heat pump unit, therefore, it is possible to improve the operating efficiency of the heat pump cycle.

  The present invention can provide a heat pump water heater capable of highly efficient boiling operation without reducing the operating efficiency (COP) of the heat pump cycle.

A heat pump water heater of a first invention includes a heat pump unit having a heat pump cycle, a tank unit having a hot water storage tank for storing hot water, a water side pipe through which hot water sent from the tank unit to the heat pump unit circulates, and the heat pump A hot water side pipe through which hot water sent from the unit to the tank unit circulates, and a heat pump hot water side connection means for connecting the hot water side pipe and the heat pump unit, and a part of the housing of the heat pump unit has a convex shape And, since the heat pump hot water side connecting means is disposed in the housing via the convex shape, the contact area where the heat pump hot water side connecting means touches the housing of the heat pump unit can be reduced. Heat pump from high temperature hot water through the connection side of the heat pump It is possible to reduce the heat radiation amount of the unit to the housing, and thus, it is possible to improve the operating efficiency of the heat pump cycle.

  The heat pump water heater of the second invention is the heat pump water heater of the first invention, particularly comprising heat pump water side connection means for connecting the water side pipe and the water supply pipe of the heat pump unit, and a part of the housing of the heat pump unit is provided. The contact area between the low-temperature heat pump water-side connecting means and the housing of the heat pump unit is reduced by adopting a convex shape and the heat pump water-side connecting means being disposed in the casing via the convex shape. Therefore, heat conduction to the low temperature water side can be suppressed.

  A heat pump water heater of a third invention includes a heat pump unit having a heat pump cycle, a tank unit having a hot water storage tank for storing hot water, a water side pipe through which hot water sent from the tank unit to the heat pump unit circulates, and the heat pump A hot water side pipe through which hot water sent from a unit to the tank unit flows, and a heat pump hot water side connection means for connecting the hot water side pipe and the heat pump unit, and a part of the heat pump hot water side connection means is convex And, since the heat pump hot water side connecting means is disposed in the housing via the convex shape, the contact area where the heat pump hot water side connecting means touches the housing of the heat pump unit can be reduced. Heat pump from high-temperature hot water via the heat pump hot water side connection means It is possible to reduce the amount of heat released to the knit of the housing, and thus, it is possible to improve the operating efficiency of the heat pump cycle.

  A heat pump water heater according to a fourth aspect of the invention includes a heat pump water side connection means for connecting the water side pipe and a water supply pipe of the heat pump unit, particularly in the third invention, and a part of the heat pump water side connection means. The contact area between the low-temperature heat pump water-side connecting means and the housing of the heat pump unit is reduced by adopting a convex shape and the heat pump water-side connecting means being disposed in the casing via the convex shape. Therefore, heat conduction to the low temperature water side can be suppressed.

  In the heat pump water heater of the fifth invention, in any one of the first to fourth inventions, the convex shape provided between the heat pump unit and the hot water side pipe and / or the heat pump unit and the water side pipe, Since it is provided between the tank unit and the hot water side pipe and / or between the tank unit and the water side pipe, the heat conduction generated in the heat pump unit can be suppressed even in the tank unit. Can be improved.

  A heat pump water heater according to a sixth aspect of the present invention is the heat pump water heater according to any one of the first to fifth aspects, further comprising heat pump water side connection means for connecting the water side pipe and the water supply pipe of the heat pump unit, The connection means and the heat pump water side connection means are arranged side by side vertically or horizontally or diagonally on the housing of the heat pump unit, and between the heat pump hot water side connection means and the heat pump water side connection means By providing an opening on the casing of the heat pump unit between the two, it is possible to reliably prevent the temperature of the low-temperature water from being increased by the opening through the casing of the heat pump unit.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited by this embodiment.

(Embodiment 1)
FIG. 1 is a configuration diagram of a heat pump water heater in the present embodiment. In FIG. 1, the heat pump water heater in the present embodiment has a heat pump unit 1 and a tank unit 2. The heat pump unit 1 and the tank unit 2 are water side piping 11 through which low temperature hot water flows and hot water through which high temperature hot water flows. They are connected by a side pipe 12.

  Next, the configuration of the heat pump unit 1 will be described. The heat pump unit 1 includes a compressor 3 that compresses a refrigerant, a hot water supply heat exchanger 4 that exchanges heat between high-temperature and high-pressure refrigerant and low-temperature water, an expansion valve 5 that decompresses the refrigerant, and an evaporator 6 that absorbs heat from the atmosphere. The refrigerant flow path of the compressor 3, the hot water supply heat exchanger 4, the expansion valve 5, and the evaporator 6 are sequentially connected in an annular manner through a refrigerant pipe to form a heat pump cycle 25. And it has the ventilation fan 7 for sending air to the evaporator 6, and when the ventilation fan 7 drives, the heat exchange with the refrigerant | coolant and air in the evaporator 6 is accelerated | stimulated. Further, in the present embodiment, carbon dioxide is used as the refrigerant filled in the heat pump cycle 25, but the present invention is not limited to carbon dioxide, and any refrigerant that can generate hot water is used. There is no problem even if a simple refrigerant is used, and the present invention does not limit the type of the refrigerant.

  The operation of the heat pump cycle configured as described above will be described. The high-temperature and high-pressure gas refrigerant discharged from the compressor 3 exchanges heat with the water conveyed from the hot water storage tank 8 in the hot water supply heat exchanger 4 to be in a liquid or liquid gas two-phase state, and is decompressed by the expansion valve 5 to become a low temperature. It becomes a low-pressure liquid-gas two-phase refrigerant. Thereafter, the evaporator 6 repeats the heat pump cycle operation in which heat is exchanged with the air supplied to the evaporator 6 by the blower fan 7, and the refrigerant absorbs heat from the air and returns to the compressor 3.

  On the other hand, the tank unit 2 includes a hot water storage tank 8 for storing hot water, a circulation pump 9 for conveying the low temperature water in the hot water storage tank 8 to the hot water supply heat exchanger 4 in the heat pump unit 1, high temperature water in the hot water storage tank 8, It has a mixing valve 10 that mixes water supplied from a water supply source to produce hot water of a predetermined temperature, and includes a bottom portion of the hot water storage tank 8, a circulation pump 9, a water flow path of the hot water supply heat exchanger 4, and a hot water storage tank. A boiling circuit is formed by connecting the upper part of the ring 8 in an annular fashion with a hot water supply pipe. In the boiling circuit, the pipe connecting the heat pump unit and the tank unit on the low temperature side is the water side pipe 11, and the pipe connecting the heat pump unit and the tank unit on the high temperature side is the hot water side pipe 12.

  Hot water mixed at an appropriate temperature by the mixing valve 10 is supplied to a hot water supply pipe (not shown) for supplying hot water to a bathroom, kitchen, washroom, and the like. The tank unit 2 is provided with a water supply port 18 to which an external water pipe (not shown) is connected and a hot water port 19 to which a hot water supply pipe for supplying hot water is connected.

  A boiling operation in the tank unit configured as described above will be described. By driving the circulation pump 9, the low temperature water at the bottom of the hot water storage tank 8 is conveyed to the hot water supply heat exchanger 4 through the water side pipe 11, where it exchanges heat with the high temperature refrigerant in the heat pump cycle, And returned to the upper part of the hot water storage tank 8 through the hot water side pipe 12.

  A connection port 13 a connected to the water-side pipe 11 and a connection port 13 b connected to the hot water-side pipe 12 are provided on the side surface of the housing 17 constituting the outer shell of the heat pump unit 1. Further, the tank unit 2 is provided with a connection port 13 c connected to the water side pipe 11 and a connection port 13 d connected to the hot water side pipe 12. Next, a method for arranging the connection port 13a and the connection port 13b will be described.

FIG. 2 is an enlarged view of a portion X in FIG. As shown in FIG. 2, the high temperature side end 21 of the hot water supply pipe extending from the hot water supply heat exchanger 4 is taken out from a pipe takeout port 22b provided in the housing 17, and its endmost part is connected to the connection port 13b. ing. In addition, although the connection port 13b of high temperature hot water side piping is demonstrated, it shall assume the same structure also about the connection port 13a of low temperature side piping, and in the case of the low temperature side connection port 13a, from the hot water supply heat exchanger 4 The low temperature side end of the hot water supply pipe to be extended is taken out from the pipe take-out port 22a provided in the housing 17, and the outermost end is connected to the connection port 13a.

  On the other hand, an adapter 23a is provided at the end of the water side pipe 11 connected to the heat pump unit, and an adapter 23b is provided at the end of the hot water side pipe 12 connected to the heat pump unit. By connecting the connection port 13a and further connecting the adapter 23b and the connection port 13b, the heat pump unit 1 and the tank unit 2 can be connected by the water side pipe 11 and the hot water side pipe 12. In the present invention, the heat pump water side connection means is constituted by the adapter 23a and the connection port 13a, and the heat pump hot water side connection means is constituted by the adapter 23b and the connection port 13b.

  Next, a contact portion between the housing 17 and the connection port 13b will be described. In the present invention, a plurality of convex portions 24 are provided in part of the contact portion between the housing 17 and the connection port 13b. The convex portion 24 of the present invention is formed by pressing into a conical shape, but is not limited to this, as long as the convex shape is formed with respect to the flat portion of the housing 17, for example, A convex shape may be formed so as to further surround the circumference of the circular pipe outlet 22b with a circular shape. Even if the pipe outlet 22b is not circular, a convex shape may be formed so as to surround the periphery of the shape.

  In the present invention, as shown in FIG. 2, the contact between the connection port 13 b and the housing 17 is configured to contact via a convex portion 24 formed in the housing 17. And since the hot water of 65 degreeC-90 degreeC heated with the hot water supply heat exchanger 4 flows into the hot water side piping 12, the hot water just heated with the hot water supply heat exchanger 4 is supplied to the connection port 13b. Therefore, heat is radiated from the connection port 13b to the outside. Therefore, in the configuration of the heat pump unit in which the connection port 13b and the housing 17 are in contact, heat from the connection port 13b is conducted to the housing 17, but in the present invention, the contact between the connection port 13b and the housing 17 is achieved. Can be stopped with a minimum of contact, and as a result, the heat conduction area can be reduced. That is, the convex portion 24 functions as a means for preventing heat conduction to the housing 17.

  Here, the feature of the hot water storage type water heater having a heat pump as a heat source will be described. If the low-temperature water is supplied to the hot water supply heat exchanger 4 constituting the heat pump cycle, the heat of the refrigerant can be efficiently recovered. The heat recovery efficiency from the water will be very poor. Thus, as a specific problem when the heat pump is used as a heat source, there arises a problem of how to prevent the medium-temperature water and high-temperature water from being sent to the hot water supply heat exchanger 4 and efficiently recover the heat of the refrigerant.

  However, as described above, in the conventional heat pump water heater, since the contact area between the housing and the connection port is large, the amount of heat released from the connection port (that is, the outlet from which the high temperature hot water is discharged from the heat pump unit) to the housing is reduced. The heat increases, and the heat is conducted to the water sent from the tank unit to the heat pump unit via the housing 17, and the temperature of the water supplied to the hot water supply heat exchanger rises, which is very efficient. Will get worse.

  In order to suppress the heat radiation from the connection port to the housing, a method of inserting a heat insulating material between the connection port and the housing may be considered, but such a method is very expensive and Assembling man-hours will increase, resulting in a heat pump water heater with very poor productivity.

  Therefore, as in the present invention, the contact area between the connection port 13b and the housing 17 can be minimized by simply forming the convex portion 24 on the housing 17, and the connection port 13b to the housing 17 can be minimized. Since heat can be prevented and, as a result, heat conducted from the housing 17 to the connection port 13a can be suppressed, the temperature of the water supplied to the hot water supply heat exchanger 4 is not increased, and it is very efficient. A heat pump water heater can be provided.

  Further, as shown in FIG. 2, not only the convex portion 24 is provided between the connection port 13 b (high temperature water outlet) and the housing 17, but the convex portion 24 is provided between the connection port 13 a and the housing 17. Thus, heat conduction from the housing 17 to the connection port 13a (low temperature water inlet) can be further suppressed, and a more efficient heat pump water heater can be provided.

  In addition, when performing an operation of boiling all the water in the hot water storage tank 8 into hot water (boiling of the whole amount), the temperature of the hot water supplied to the hot water supply heat exchanger 4 is 50-60 ° C. immediately before the end of the operation. It becomes relatively hot. Then, the contact area of the connection part 13a and the housing | casing 17 exists by having the convex part 24 pressed between the connection part 13a of the water side piping 11 of the heat pump unit 1, and the housing | casing 17 of the heat pump unit 1. FIG. The heat of the water in the water-side pipe 11 that has become relatively small and becomes relatively high temperature suppresses heat conduction to the housing 17 of the heat pump unit 1, and consequently reduces heat loss radiated into the air. Can do.

  FIG. 3 is an enlarged side view of the heat pump unit 1. As shown in FIG. 3, the water side pipe 11 and the hot water side pipe 12 can be connected to the heat pump unit 1 by connecting the adapter 23a and the adapter 23b to the connection port 13a and the connection port 13b, respectively, from the arrow direction. . In addition, the water side pipe 11 and the hot water side pipe 12 are respectively surrounded by a heat insulating material 31 and a heat insulating material 32 for preventing heat radiation.

  Although the connection between the heat pump unit 1 and the water side pipe 11 and the hot water side pipe 12 has been described so far, the connection between the tank unit 2 and the water side pipe 11 and the hot water side pipe 12 is the same, and the connection port 13c. 13d and an adapter (not shown) are connected to the hot water supply pipe in the tank unit 2, the water side pipe 11 and the hot water side pipe 12. The casing of the tank unit 2 is also provided with a convex shape provided on the casing of the heat pump unit 1. Therefore, since the hot water side pipe 12 and the water side pipe 11 are connected also via the convex part in the tank unit 2, as well as preventing heat from being conducted to the housing 17 of the heat pump unit 1, Needless to say, heat can be prevented from being conducted to the casing of the tank unit 2.

  As shown in FIG. 3, a connection port 13a for connecting the water side pipe 11 and a connection port 13b for connecting the hot water side pipe 12 are arranged up and down, and a groove-shaped opening 33 is provided between them. It has been. Thus, by providing the opening 33, heat transmitted from the connection port 13b (high temperature water outlet) to the connection port 13a (low temperature water inlet) can be blocked, and further, the rise of low temperature water can be suppressed. . As a result, the boiling efficiency can be further improved, and a very efficient heat pump water heater can be provided.

  In addition, since the connection port 13a and the connection port 13b are arrange | positioned up and down, the opening part 33 as shown in FIG. 3 is provided, but it is not limited to this, For example, the connection port 13a and Even if the connection port 13b is disposed in an oblique direction, or the connection port 13a and the connection port 13b are disposed on the left and right, by providing an opening between the disposed connection ports, Heat conduction from the side to the low temperature side can be suppressed.

  As described above, according to the heat pump water heater in the present embodiment, the heat of the hot water in the hot water side pipe 12 is suppressed from conducting heat to the housing 17 of the heat pump unit 1 and the housing of the tank unit 2. Further, the heat of the hot water in the hot water side pipe 12 is prevented from being transmitted to the water in the water side pipe 11 to raise the temperature, and the heating operation efficiency of the heat pump unit 1 can be prevented from being lowered. Furthermore, since an expensive heat insulating material is not used as a heat conduction preventing means, profitability can be improved, and a shortage during assembly can be prevented, and productivity can be further improved.

(Embodiment 2)
The heat pump water heater in Embodiment 2 is different from the heat pump water heater in Embodiment 1 in that the shape of connecting means for connecting the water side pipe 11 and the hot water side pipe 12 to the heat pump unit and / or the tank unit is different. Since this is a different point and the other functions and configurations are the same as those of the first embodiment, the same reference numerals are given and description thereof is omitted.

  FIG. 4 is an enlarged view of a portion X of the heat pump unit 1 shown in FIG. 1, and shows a schematic cross-sectional view of the vicinity of the connection portion of the water side pipe 11 and the hot water side pipe 12 of the heat pump unit 1. In FIG. 4, the difference from the first embodiment is that the housing 17 of the heat pump unit 1 is not provided with a convex portion, and instead the convex portion 25 is provided in the heat pump hot water side connecting means and the heat pump water side connecting means. In detail, the convex part 25 is formed in the connection port 13a which comprises a heat pump water side connection means, and the connection port 13b which comprises a heat pump hot water side connection means.

  Next, the part which forms the convex part 25 is demonstrated. In addition, since the location which forms the convex part 25 of the connection port 13a and the connection port 13b is the same, the location which forms the convex part 25 of the connection port 13a is demonstrated here.

  The convex portion 25 is provided at a position facing the housing 17 when the connection port 13a is connected to the end of the pipe of the hot water supply heat exchanger extracted from the pipe extraction port 22a. As a result, when the connection port 13a comes into contact with the housing 17 and is screwed, the connection port 13a is supported by the housing 17 by the convex portion 25, and the connection port 13a is stably supported. In the present embodiment, the convex portion 25 is a substantially conical convex portion, but is not limited to this, and for example, a raised portion is provided at a position facing the housing 17 of the connection port 13a. Even if it is only, since the contact area of the connection port 13a and the housing | casing 17 can be made small, there can exist the same effect. Furthermore, the convex shape of the convex portion 25 is not limited to a substantially conical shape, and a linear shape, a circular shape, or the like can also be used.

  As described above, the present invention improves the boiling efficiency, which is very important for realizing a heat pump type water heater, and suppresses the release of heat of high-temperature water to the outside via the heat pump unit and the tank unit. can do.

Configuration diagram of heat pump water heater in Embodiment 1 of the present invention X part enlarged view in the same embodiment Heat pump unit side main part enlarged view in the same embodiment In Embodiment 2 of the present invention Configuration diagram of conventional heat pump water heater Connection diagram of conventional heat pump unit and tank unit Part A enlarged view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat pump unit 2 Tank unit 3 Compressor 4 Hot water supply heat exchanger 5 Expansion valve 6 Evaporator 7 Blower fan 8 Hot water storage tank 9 Circulation pump 10 Mixing valve 11 Water side piping 12 Hot water side piping 13a Connection port (low temperature water inlet)
13b Connection port (high temperature water outlet)
13c Connection port (low temperature water outlet)
13d connection port (hot water inlet)
17 Housing (heat pump unit)
18 Water supply port 19 Hot water port 22a Pipe outlet 22b Pipe outlet 23a Adapter 23b Adapter 24 Convex part 25 Convex part 31 Insulating material 32 Insulating material 33 Opening part

Claims (6)

A heat pump unit having a heat pump cycle, a tank unit having a hot water storage tank for storing hot water, a water side pipe through which hot water sent from the tank unit to the heat pump unit circulates, and hot water sent from the heat pump unit to the tank unit A hot water side pipe that circulates, a heat pump hot water side connection means that connects the hot water side pipe and the heat pump unit, a part of the housing of the heat pump unit has a convex shape, and the heat pump hot water side connection means includes the A heat pump water heater, which is disposed in the housing via a convex shape. A heat pump water side connection means for connecting the water side pipe and the water supply pipe of the heat pump unit is provided, a part of the housing of the heat pump unit has a convex shape, and the heat pump water side connection means is connected via the convex shape. The heat pump water heater according to claim 1, wherein the heat pump water heater is disposed in the housing. A heat pump unit having a heat pump cycle, a tank unit having a hot water storage tank for storing hot water, a water side pipe through which hot water sent from the tank unit to the heat pump unit circulates, and hot water sent from the heat pump unit to the tank unit A hot water side pipe that circulates, a heat pump hot water side connection means that connects the hot water side pipe and the heat pump unit, a part of the heat pump hot water side connection means has a convex shape, and the heat pump hot water side connection means includes the A heat pump water heater, which is disposed in the housing via a convex shape. Heat pump water side connection means for connecting the water side pipe and the water supply pipe of the heat pump unit is provided, a part of the heat pump water side connection means has a convex shape, the heat pump water side connection means via the convex shape A heat pump water heater disposed in the housing. A convex shape provided between the heat pump unit and the hot water side pipe and / or between the heat pump unit and the water side pipe is provided between the tank unit and the hot water side pipe and / or between the tank unit and the water side pipe. The heat pump water heater according to any one of claims 1 to 4, wherein the heat pump water heater is provided. The heat pump hot water side connecting means and the heat pump water side connecting means are arranged side by side vertically or horizontally or diagonally on the housing of the heat pump unit, and the heat pump hot water side connecting means and the heat pump water side The heat pump water heater according to any one of claims 1 to 5, wherein an opening is provided between the connecting means and the housing of the heat pump unit.

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