JP2019113279A - Heat pump hot water supply device - Google Patents

Abstract

To provide a heat pump hot water supply device capable of reducing vibration which is transmitted to a body case via a connection part for connecting an end part of a hot water pipe for connecting a condensation heat exchanger to a hot water storage and hot water supply unit.SOLUTION: A heat pump hot water supply device includes a heat pump circuit in which a compressor, a condensation heat exchanger 33, expansion means, and an evaporation heat exchanger are connected by a refrigerant piping, and heats hot water flowing through hot water pipes 39, 40 connected to the condensation heat exchanger 33. The hot water pipes 39, 40 are for connecting hot water connection metal fittings 38a, 38b fixed to an outer package case to the condensation heat exchanger 33. A pair of connection parts 41, 52, 54 for connecting each of the hot water pipes 39, 40 to the hot water connection metal fittings 38a, 38b and the condensation heat exchanger 33 are each detachably and rotatably connected by quick fasteners 45, 51, 53, and at least one of the pair of connection parts 41, 52, 54 are connected via an elbow joint 43.SELECTED DRAWING: Figure 2

Description

  BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a heat pump water heater, and more particularly to an apparatus for reducing vibration propagating from a condensing heat exchanger to an outer case.

The heat pump water heater includes a hot water storage unit containing a hot water storage tank, piping, valves and pumps, and other devices, and a heat pump unit for heating hot and cold water supplied from the hot water storage and hot water supply unit. The hot water storage unit is covered with an exterior case.
The heat pump unit includes a heat pump circuit in which a compressor, a condensing heat exchanger, an expansion means, and an evaporation heat exchanger are connected by refrigerant pipes, and the condensing heat exchanger is connected to the hot water storage unit through hot water piping.

The hot and cold water piping described above comprises a hot and cold water piping for supplying hot and cold water to the condensing heat exchanger, and a hot and cold water returning piping for returning the hot and cold water from the condensing heat exchanger to the hot water storage unit.
Generally, the downstream end of the hot water delivery piping and the upstream end of the hot water return piping are connected to the condensing heat exchanger by brazing respectively, and the upstream end of the hot water delivery piping and the downstream end of the hot water return piping are of the hot water storage unit It is connected to the connection metal fixed to the exterior case by the quick fastener, respectively.

In the heat pump water heater described in Patent Document 1, a coupling type connection portion or a quick fastener type connection portion is provided in the middle of the forward piping and the return piping in the vicinity of the condensing heat exchanger, and these coupling portions are The separation facilitates the removal of the condensing heat exchanger to facilitate maintenance.

JP, 2011-149631, A

In the heat pump unit, during operation of the compressor, the vibration from the compressor is propagated to the condensing heat exchanger via the refrigerant circuit, and the vibration of the condensing heat exchanger is the hot-water hot water supply via the above-mentioned forward piping and return piping. It propagates to the exterior case of the unit, and the vibration and noise around the heat pump water heater deteriorate. As measures against vibration from the compressor, it is also known to fix the compressor to a mounting portion through a rubber leg or to provide a U-shaped bent U-shaped portion in the refrigerant passage between the compressor and the condensing heat exchanger. It is. However, depending on the rubber legs and the U-shaped portion, only a small portion of the vibration generated by the compressor can be absorbed.

Here, since the downstream end of the hot water / water outgoing pipe and the upstream end of the hot water / water return pipe are integrally connected to the condensing heat exchanger by brazing to the condensing heat exchanger, they were propagated from the compressor to the condensing heat exchanger The problem that the vibration is easily transmitted to the outer case through the hot and cold water piping and the hot water return piping, and the vibration and noise are generated from the outer case remains unsolved.
An object of the present invention is to provide a heat pump water heater capable of reducing vibration propagating to an outer case through a connecting portion connecting the ends of a pair of hot and cold water pipes connecting a condensing heat exchanger to a hot water storage unit. It is.

The heat pump water heater according to claim 1 includes a heat pump circuit in which a compressor, a condensing heat exchanger, an expansion means, and an evaporation heat exchanger are connected by a refrigerant pipe, and hot water flowing through the hot water pipe connected to the condensing heat exchanger. In the heat pump water heater for heating the hot water piping, the hot water piping is connected to the hot water connector fixed to the exterior case and the condensing heat exchanger, and each of the hot water piping is connected to the hot water connector and the condensation heat Each of the pair of connection parts connected to the exchanger is detachably and rotatably connected by a quick fastener, and at least one of the pair of connection parts is connected via an elbow joint. And

According to the above configuration, the pair of connection parts for connecting the hot and cold water pipes to the hot water connector and the condensing heat exchanger are detachably and rotatably connected by the quick fasteners, respectively.
Since the function of reducing the vibration propagation is superior to the case of brazing, the vibration propagating from the condensing heat exchanger to the outer case is reduced.
In addition, at least one of the pair of connection parts is connected via the elbow joint, and is detachable and rotatable at both ends of the elbow joint, and the connection direction also faces in a 90 ° different direction. , Excellent in vibration propagation reduction function. Therefore, vibration propagation from the condensing heat exchanger to the outer case is significantly reduced. Therefore, vibration and noise around the heat pump water heater can be significantly reduced.

  The heat pump water heater according to claim 2 includes a heat pump circuit in which a compressor, a condensing heat exchanger, an expansion means, and an evaporating heat exchanger are connected by a refrigerant pipe, and hot water flowing through the hot water pipe connected to the condensing heat exchanger. In the heat pump water heater for heating the hot water pipe, the hot water pipe connects the hot water connector fixed to the outer case and the condensing heat exchanger, and the hot water pipe has two pipes, a forward pipe and a return pipe. Consisting of piping, a pair of connecting parts of the two piping and the hot water connection fitting are directed in the same direction, and a pair of connecting parts of the two piping and the condensing heat exchanger are in the same direction It is characterized in that it is directed on the same axis.

According to the above configuration, a pair of connection parts of the two pipes of the two pipes, the condensation heat exchanger and the condensation heat exchanger are disposed on the same axis in the same direction. Since the condensing heat exchanger becomes rotatable around its pair of connections, the vibration of the condensing heat exchanger is damped through the micro rotation of the condensing heat exchanger. Vibration transmitted from the heat exchanger to the outer case through the two pipes can be reduced. Therefore, vibration and noise around the heat pump water heater can be reduced.

The heat pump water heater according to claim 3 is characterized in that a pair of connection parts of the two pipes and the hot water connection fitting are directed in the same direction.
According to the above configuration, since the pair of connections between the two pipes and the hot water connection fitting are directed in the same direction, minute movement of the condensation heat exchanger is permitted via the pair of connections. As a result, vibration is less likely to propagate from the condensing heat exchanger to the two pipes. Therefore, vibration and noise around the heat pump water heater can be reduced.

  As described above, according to the present invention, vibration is less likely to propagate from the condensing heat exchanger to the outer case through the two hot water pipes, and vibration and noise around the heat pump water heater are reduced.

It is a block diagram which shows the whole structure of the hot water storage hot water supply apparatus which concerns on the Example of this invention. It is a perspective view which shows the connection state of a condensation heat exchanger, a pair of copper hot and cold water piping, a pair of elbow joints, and a pair of hot and cold water connection fittings. It is a side of a condensing heat exchanger, a pair of copper water and water pipes, a pair of elbow joints, and a pair of water and water fittings. It is a perspective view of the connection part which connects the upper end part of copper-made hot and cold water piping to a condensation heat exchanger. It is the VV sectional view taken on the line of FIG. It is a perspective view of the connection structure which connects the lower end part of copper-made hot and cold water piping to a condensing heat exchanger via an elbow joint. It is principal part sectional drawing of the connection structure of FIG. It is the FIG. 2 equivalent view which concerns on Example 2. FIG. It is the FIG. 3 equivalent view which concerns on Example 2. FIG. It is principal part sectional drawing of the connection structure which connects the lower end part of copper hot and cold water piping to the condensation heat exchanger in Example 2. FIG.

  Hereinafter, the form for carrying out the present invention is explained based on an example.

First, the entire configuration of the heat pump water heater 1 will be described based on FIG. 1.
The heat pump hot water supply apparatus 1 has a hot water storage hot water supply unit 2 and a heat pump heat source machine 3. The hot water storage hot water supply unit 2 includes a hot water storage tank 4, a gas combustion auxiliary heat source machine 10, and other devices (piping, valve, temperature sensor And the like, and an outer case 2 a covering the hot water storage and hot water supply unit 2. The hot water storage unit 2 stores the hot and cold water heated by driving the heat pump heat source unit 3 in the hot water storage tank 4 and uses the stored hot and cold water for hot water supply and pouring of the bath 29. Moreover, the hot and cold water taken out from the hot water storage tank 4 can be heated by the auxiliary heat source machine 10 as needed, and can be used for hot water supply, bath remembrance, etc.

  At the upper portion of the hot water storage tank 4, a hot water discharge passage 11 is connected for discharging hot water stored in the hot water storage tank 4. At the lower part of the hot water storage tank 4, a water supply passage 12 for supplying clean water to the hot water storage tank 4 from an upper water source is connected. A bypass passage 13 branched from the water supply passage 12 is connected to the hot water discharge passage 11, and a hot water / water mixing valve 14 capable of adjusting a mixing ratio of mixing hot water of the hot water discharge passage 11 and upper water of the bypass passage 13 is connected to this connection portion. It is done. A hot water supply passage 15 is connected to the hot and cold water mixing valve 14, and the hot and cold water mixed by the hot and cold water mixing valve 14 flows through the hot water supply passage 15 and can be supplied to a hot water tap or the like not shown. The bath 29 can be filled with water via a pouring passage 18 connected to the memorial passage 28.

  The return side hot water passage 5b for supplying hot water heated by the heat pump heat source machine 3 to the hot water storage tank 4 is connected to the lower part of the hot water storage tank 4 and the forward side hot water passage 5a for supplying hot water to the heat pump heat source machine 3 is connected. It is connected to the upper part of 4, and the circulation heating passage 5 which can circulate hot and cold water between the hot water storage tank 4 and the heat pump heat source machine 3 is formed.

An incoming water temperature sensor 6a for detecting the incoming water temperature of hot water entering the heat pump heat source machine 3 from the hot water storage tank 4, a circulation pump 16, and a switching valve 17 are connected to the forward side hot water passage 5a. The return side hot water passage 5b is connected with a heating temperature sensor 6b for detecting the temperature of hot water heated by the heat pump heat source machine 3, and a bypass passage 5c is provided to connect the forward side hot water passage 5a and the return side hot water passage 5b. The switching valve 17 is connected to the connection between the forward side hot water passage 5a and the bypass passage 5c. When the heating temperature immediately after startup of the heat pump heat source machine 3 is low, the switching valve 17 can be switched to send hot water heated by the heat pump heat source machine 3 to the heat pump heat source machine 3 again to reheat.

  On the outer periphery of the hot water storage tank 4, a plurality of hot water storage temperature sensors 4a to 4d for detecting the temperature of the stored hot and cold water are provided at predetermined intervals in the vertical direction. These hot water storage temperature sensors 4a to 4d and the hot water storage tank 4 are covered with a heat insulating material not shown. A hot water outlet temperature sensor 11 a for detecting a hot water temperature of hot water supplied to the hot water mixing valve 14 is connected to the hot water passage 11. A water supply temperature sensor 12a is connected to the water supply passage 12 for detecting the temperature of the clean water supplied from the clean water source. A hot water supply temperature sensor 15 a for detecting a hot water supply temperature is connected to the hot water supply passage 15.

  An auxiliary heating passage 21 for heating the hot and cold water of the hot water storage tank 4 by the auxiliary heat source unit 10 is branched from the hot water outlet passage 11 and connected to the auxiliary heat source unit 10. An auxiliary outlet passage 22 for discharging hot water heated by the auxiliary heat source unit 10 is connected to the outlet passage 11 on the downstream side of the branch portion of the auxiliary heating passage 21 via a control valve 23. The adjustment valve 23 adjusts the amount of hot and cold water supplied to the tapping passage 11 through the auxiliary tapping passage 22. A three-way valve 24 and a pump 25 for feeding hot and cold water to the auxiliary heat source unit 10 are interposed in the auxiliary heating passage 21.

  The heat exchange passage 26 branched from the auxiliary hot water discharge passage 22 is connected to the three-way valve 24. The three-way valve 24 is switched so that the hot water of the hot water storage tank 4 or the hot water of the heat exchange passage 26 can be supplied to the auxiliary heat source unit 10. A heat exchanger 26 a and an on-off valve 26 b are interposed in the heat exchange passage 26. The heat exchanger 26a is used for a follow-up operation in which the hot and cold water in the bath 29 flowing through the follow-up passage 28 is heated by heat exchange with the hot and cold water heated by the auxiliary heat source unit 10 by the operation of the follow-up pump 27.

  Connected to the water supply passage 12 are a check valve 12 b and a branch passage portion 12 c branched from the water supply passage 12 and connected to the heat exchange passage 26. A check valve 13 a is interposed in the bypass passage 13, and a high temperature outlet hot water avoidance solenoid valve 30 a is interposed in the high temperature outlet hot water bypass passage 30 which is branched from the bypass passage 13 and connected to the hot water supply passage 15.

  The heat pump heat source unit 3 includes a heat pump circuit 36 in which a compressor 32, a condensing heat exchanger 33, an expansion valve 34, and an evaporation heat exchanger 35 are connected by a refrigerant pipe 36a. The heat pump heat source unit 3 compresses the refrigerant sealed in the refrigerant pipe 36 a with the compressor 32 and raises the temperature, drives the circulation pump 16, and causes the hot water flowing through the circulation heating circuit 5 to have a high temperature in the condensation heat exchanger 33 Heat by heat exchange with the refrigerant. The refrigerant after heat exchange is expanded by the expansion valve 34 to become lower temperature than the outside air, and after absorbing heat from the outside air in the evaporative heat exchanger 35, it is introduced into the compressor 32 again.

  The evaporative heat exchanger 35 includes an outside air temperature sensor 35a that detects an outside air temperature and a blower 35b. The heat pump heat source unit 3 includes an auxiliary control unit 37 that controls the compressor 32, the expansion valve 34, the blower 35b, and the like. The auxiliary control unit 37 is communicably connected to the control unit 7 and controls the heat pump heat source unit 3 in accordance with a command from the control unit 7. The outside air temperature detected by the outside air temperature sensor 35 a is transmitted to the control unit 7 via the auxiliary control unit 37.

Next, the hot and cold water piping connecting the condensing heat exchanger 33 to the hot water storage and hot water supply unit 2 will be described.
The condensing heat exchanger 33 is connected to the hot water storage hot water supply unit 2 via the forward side hot water passage 5a and the return side hot water passage 5b. In the middle part of the forward side hot water passage 5a, a hot water connection fitting 38a fixed to the exterior case 2a is provided, and the forward side hot water passage 5a is made of copper hot water piping 39 (outgoing piping) downstream of the hot water connection 38a. Corresponding). In the middle part of the return side hot water passage 5b, a hot water connection fitting 38b fixed through in the outer case 2a is provided, and the return side hot water passage 5b is a copper hot water piping 40 on the upstream side of the hot water connection fitting 38b (return piping Equivalent to).

Condensing heat exchanger 33 is disposed in a substantially horizontal posture by winding double pipes 33a consisting of an inner pipe and an outer pipe into an oval shape in multiple and flat, and the refrigerant is supplied to the inner pipe Hot and cold water is supplied to the hot and cold water passage between the pipe and the outer pipe.
The downstream end (upper end) of the copper hot water pipe 39 is connected to the hot water passage between the inner pipe and the outer pipe at one end of the condensing heat exchanger 33 by the connection portion 41, and the upstream end of the copper hot water pipe 40 ( The upper end portion is connected to the hot water passage between the inner pipe and the outer pipe at the other end of the condensation heat exchanger 33 by a connection portion 42. The pair of connection portions 41 and 42 are directed in the same horizontal direction (the Z direction in FIG. 2) and disposed on the same axis B.

  The upstream end (lower end) of the copper water / water piping 39 is connected to the water / water fitting 38a through the elbow joint 43, and the downstream end (lower end) of the copper water / water piping 40 is through the elbow joint 44b Is connected.

As shown in FIG. 2 and FIG. 3, the copper hot and cold water pipe 39 has a predetermined length, and is a horizontal portion which is bent at five bending portions and extends in the extension direction (X direction in FIG. 2) of the one end. 39a and a vertical portion 39b which descends downward from the end of the horizontal portion 39a.
The horizontal portion 39a is formed in the shape of three sides other than the base of the trapezoidal shape, and has a structure capable of absorbing a part of the vibration from the condensing heat exchanger 33. The vertical portion 39 b is formed in the shape as shown in FIG. 3 and has a structure capable of absorbing a part of the vibration from the condensing heat exchanger 33.

As shown in FIG. 2 and FIG. 3, the copper hot and cold water piping 40 has a predetermined length, is horizontal at five bending parts, and extends in the extension direction (X direction in FIG. 2) of the other end. It has a portion 40a and a vertical portion 40b which descends downward from the end of the horizontal portion 40a.
The horizontal portion 40a is formed in the shape of three sides other than the base of the trapezoidal shape, and has a structure capable of absorbing a part of the vibration from the condensing heat exchanger 33. The vertical portion 40 is formed in a shape as shown in FIG. 3 and has a structure capable of absorbing a part of the vibration from the condensing heat exchanger 33. The copper hot and cold water pipes 39 and 40 are formed in the same shape.

Next, since the connection parts 41 and 42 which connect the copper-made hot and cold water piping 39 and 40 are the same structures, the connection part 41 is demonstrated based on FIG. 4, FIG.
The connection portion 41 is configured to connect the upper end portion of the copper hot and cold water pipe 39 to the side surface of the one end portion of the condensing heat exchanger 33 by a quick fastener 45 so as to be freely and rotatably. The quick fastener 45 is made of a springy thin steel plate (for example, a stainless steel plate). The quick fastener 45 has a U-shaped connecting portion 45a, a holding portion 45b for holding both sides of the pipe, and a pair of knobs 45c for holding with fingers. The sandwiching portion 45b is formed with a slit 45d for partially projecting the flange 46a.

  A connection hole 46 b into which the end of the copper hot water pipe 39 can be inserted is formed in the connection base 46 with the flange 46 a on the condensing heat exchanger 33 side, and an annular packing is formed on the annular convex portion 47 of the end of the copper hot water pipe 39. The presser 48 is externally fitted immovably in the axial direction, and in a state where the packing presser 48 and the O-ring 49 are externally fitted to the end of the copper hot and cold water pipe 39, they are fitted inside the connection hole 46b of the connection fitting 46; By sandwiching the flange 46 a and the packing presser 48 in the axial direction by the quick fastener 45, the connection base 46 and the copper hot and cold water pipe 39 are rotatably connected in a state of sealing in a liquid tight manner. The O-ring 49 is mounted between the flange 50 at the end of the copper hot and cold water pipe 39 and the packing presser 48.

Next, a connection structure in which the end portions of the copper hot and cold water pipes 39 and 40 are connected via the elbow joints 43 and 44 will be described. Since the connection structure by the elbow joints 43, 44 of the copper hot and cold water pipes 39, 40 is the same structure, the connection structure by the elbow joint 43 of the end portion of the copper hot water / water pipe 39 will be described based on FIG.
The elbow joint 43 has a horizontal pipe portion 43a and a vertical pipe portion 43b, the end of the horizontal pipe portion 43a is connected by the horizontal connection portion 52 including the quick fastener 51, and the end of the vertical pipe portion 43b is a quick fastener 53 are connected by a vertical connection 54.

  In the horizontal connection portion 52, a flange 55 is formed in the middle of the horizontal pipe portion 43a, and an O-ring 56 is externally fitted in the vicinity of the tip of the horizontal pipe portion 43a. And the flange 55 is brought into contact with the flange 57 of the hot water / water connection fitting 38a, and the flanges 55, 57 are held together by the quick fastener 51 for connection. The quick fastener 51 is similar to the quick fastener 45 described above.

  In the vertical connection portion 54, a flange 58 is formed at the end of the vertical pipe portion 43b, and an annular packing retainer 60 is externally fitted immovably in the axial direction to the annular convex portion 59 at the end of the copper hot water pipe 39 With the packing presser 60 and the O-ring 61 fitted outside at the end of the copper hot and cold water pipe 39, fit them in the connection hole 62 of the vertical pipe portion 43b, and use the quick fastener 53 for the flange 58 and the packing presser 60 By sandwiching in the direction, the elbow joint 43 and the copper hot and cold water pipe 39 are rotatably connected in a sealed state in a liquid tight manner. The O-ring 61 is mounted between the end flange 63 of the copper hot and cold water pipe 39 and the packing presser 60. Also, the quick fastener 53 is similar to the quick fastener 45 described above.

Next, the operation and effect of the heat pump water heater 1 described above will be described.
Since a pair of connection parts 41 and 42 which connect the upper end parts of the above-described copper hot and cold water piping 39 and 40 to the condensing heat exchanger 33 are oriented in the same direction (Z direction) and disposed on the same axis B The condensing heat exchanger 33 is not restricted by the rotation at the pair of connection portions 41 and 42, and can be minutely pivoted in the direction of arrow A in FIG. 2, so the compressor 32 acts on the condensing heat exchanger 33. A part of the vibration is absorbed by the minute rotation of the condensing heat exchanger 33 in the vertical direction. Therefore, the vibration propagating from the condensing heat exchanger to the outer case can be reduced, and the vibration and noise around the heat pump water heater 1 can be reduced.

  A pair of vertical connection parts 54, 54 connecting the lower end parts of the copper hot and cold water piping 39, 40 to the pair of elbow joints 43, 44 makes a minute rotation around the vertical axis of the lower end parts of the copper hot water piping 39, 40 To allow this, minute movement of the condensing heat exchanger 33 in the horizontal direction is permitted, and a part of the vibration acting on the condensing heat exchanger 33 from the compressor 32 is absorbed by the small movement of the condensing heat exchanger 33.

  The pair of horizontal connection portions 52, 52 connecting the pair of elbow joints 43, 44 to the hot water / water fittings 38a, 38b allow minute rotation around the horizontal axis of the pair of elbow joints 43, 44. The minute vibration in the horizontal direction of the condensing heat exchanger 33 is allowed, and a part of the vibration acting on the condensing heat exchanger 33 from the compressor 32 is absorbed by the minute vibration of the condensing heat exchanger 33.

  As described above, one of the vibrations acting on the condensing heat exchanger 33 through the pair of connection portions 41, 42, the pair of vertical connection portions 53, 53, and the pair of horizontal connection portions 52, 52. Section is absorbed by the condensing heat exchanger 33, vibration transmitted from the condensing heat exchanger 33 to the hot water connector 38a, 38b and the exterior case 2a via the pair of copper hot and cold water pipes 39, 40 is greatly reduced. The vibration noise around the heat pump water heater 1 can be significantly reduced.

Second Embodiment A second embodiment will be described based on FIGS.
However, about the same composition as Example 1, the same numerals are attached and explanation is omitted.
About a pair of connection parts 41 and 42 which connect the condensing heat exchanger 33 and the upper end part of a pair of copper hot and cold water piping 39, 40 and a pair of copper hot and cold water piping 39, 40 to the condensing heat exchanger 33 Similar to 1. The pair of elbow joints 43, 44 connecting the lower ends of the pair of copper hot water pipes 39, 40 to the pair of hot water fittings 38a, 38b is omitted, and the lower ends of the pair of copper hot water pipes 39, 40 It is directly connected to a pair of water fittings 38a, 38b by a pair of horizontal connections 62, 63. The pair of horizontal connection portions 62, 63 are directed in the same horizontal direction, and are connected detachably and rotatably.

Next, the structure of the above-mentioned horizontal connection portion 62 for connecting the lower end portion of the copper hot and cold water piping 39 to the hot and cold water connection fitting 38a will be described based on FIG.
The horizontal connection portion 62 is configured to be detachably and rotatably connected by the quick fastener 64. The quick fastener 64 is the same as the quick fastener 45 of the first embodiment, and includes a connecting portion 64a, a holding portion 64b, a pair of knobs 64c, and a slit 64d.

  A connection hole 66 is formed in the connection pipe portion 65 with the flange 65a on the hot water / water fitting 39 side and into which the end portion of the copper hot water pipe 39 can be fitted. An annular flange is formed on the annular convex portion 67 at the end of the copper hot water pipe 39 A packing presser 68 with 68a is externally fitted immovably in the axial direction, and in a state where the packing presser 68 and the O-ring 69 are externally fitted to the end of the copper hot and cold water pipe 39, they are fitted inside the connection hole 66, By sandwiching the flange 65a and the flange 68a in the axial direction by the quick fastener 64, the connection pipe portion 65 of the hot water / water connection fitting 38a and the copper hot water / water piping 39 are rotatably connected in a sealed state. There is. The O-ring 69 is mounted between the end flange 70 of the copper hot and cold water pipe 39 and the packing presser 68.

The operation and effect of the connection structure of the copper hot and cold water pipes 39 and 40 described above will be described.
The operation and effect of the pair of connection portions 41 and 42 are the same as in the first embodiment, and the operation and effect of the pair of horizontal connection portions 62 and 62 are the same as the operation and effects of the pair of horizontal connection portions 52 and 52 of the first embodiment. Is the same as

Next, an example in which the embodiment is partially changed will be described.
1) The shape of the said copper hot and cold water piping 39, 40 shows an example, Comprising: It is not limited to the shape of illustration.

2) By incorporating a flexible pipe (generally called flexible pipe) of a predetermined length into a part of the copper hot and cold water piping 39, 40, vibration transmitted from the condensing heat exchanger 33 to the hot water connector 38a, 38b is reduced. May be
3) The shape and structure of the condensation heat exchanger 33 are not limited to those shown either, but may be condensation heat exchangers of various shapes.
4) Besides, those skilled in the art can carry out the present invention in various modifications without departing from the scope of the present invention, and the present invention includes those modifications.

1 Heat pump water heater 2a Outer case 5a, 5b Forward side hot water passage, return side hot water passage
32 compressor 33 condensing heat exchanger 34 expansion valve (expansion means)
35 Evaporative heat exchanger 36 Heat pump circuit 36a Refrigerant piping 38a, 38b Hot water / water connection fitting 39, 40 Copper hot water / water piping 41, 42 Connection part
43, 44 elbow fitting 45 quick fasteners 51, 53 quick fasteners 52 horizontal connection 54 vertical connection 62, 63 connection

Claims (3)

A heat pump water heater including a heat pump circuit in which a compressor, a condensing heat exchanger, an expansion means, and an evaporation heat exchanger are connected by a refrigerant pipe, and heating hot and cold water flowing in a hot and cold water pipe connected to the condensing heat exchanger.
The hot and cold water pipe connects the hot and cold water fitting fixed to the outer case and the condensing heat exchanger,
A pair of connection parts for connecting each of the hot and cold water pipes to the hot and cold water connector and the condensing heat exchanger are respectively detachably and rotatably connected by quick fasteners,
A heat pump water heater according to claim 1, wherein at least one of the pair of connection parts is connected via an elbow joint. A heat pump water heater including a heat pump circuit in which a compressor, a condensing heat exchanger, an expansion means, and an evaporation heat exchanger are connected by a refrigerant pipe, and heating hot and cold water flowing in a hot and cold water pipe connected to the condensing heat exchanger.
The hot and cold water pipe connects the hot and cold water fitting fixed to the outer case and the condensing heat exchanger,
The hot and cold water piping consists of two pipes, a forward pipe and a return pipe,
A heat pump water heater according to claim 1, wherein a pair of connection parts between the two pipes and the condensing heat exchanger are arranged on the same axis in the same direction. The heat pump water heater according to claim 2, wherein a pair of connection parts of said two pipings and said water connection fitting are directed in the same direction.