JP2015169373A - heat pump cycle device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat pump cycle device in which a hot water temperature is prevented from being lowered due to a stopped heat pump circuit and deterioration in operating efficiency is suppressed.SOLUTION: A first heat pump circuit 10a and a second heat pump circuit 10b are operated to perform a heating operation. When a going temperature Tg reaches a target temperature Tt, the second heat pump circuit 10b is stopped, only the first heat pump circuit 10a is operated, and the going temperature Tg is controlled to become a value in a temperature range defined by an upper limit temperature Tt1 and a lower limit temperature Tt2. When only the first heat pump circuit 10a is operated, a port (b) of a three-way valve 23 is closed to attain a state in which a port (a) and a port (c) are communicated with each other. With the foregoing, hot water flowed out of a water refrigerant heat exchanger 2a flows to a bypass pipe 32 through the three-way valve 23, flows from the bypass pipe 32 into a hot water pipe 31 and further flows to an indoor unit 21.

Description

  The present invention relates to a heat pump cycle device that performs heat exchange between a refrigerant and water.

  2. Description of the Related Art Conventionally, a heat pump cycle apparatus that performs heating or hot water supply using hot water generated by performing heat exchange between a refrigerant and water is known. Among such heat pump cycle devices, a plurality of compressors, a water-refrigerant heat exchanger that performs heat exchange between refrigerant and water, an expansion valve, and a heat source side heat exchanger are sequentially connected by refrigerant piping. Some have a heat pump circuit and a hot water circuit that circulates hot water heated by each of the water-refrigerant heat exchangers to a heating terminal such as a floor heating panel or a bathroom heating device or a hot water supply terminal such as a hot water storage tank by a circulation pump. (For example, refer to Patent Document 1).

  The heat pump cycle device described in Patent Document 1 has two heat pump circuits, a floor heating panel, and a hot water storage tank. The water side flow path in the water refrigerant heat exchanger of one heat pump circuit is divided into two, and one of the water side flow paths is connected to the floor heating panel. The other water side channel is connected in series to the water side channel in the water refrigerant heat exchanger of the other heat pump circuit, and a hot water storage tank is connected to the two water side channels connected in series. In this heat pump cycle device, when performing a boiling operation in which water stored in a hot water storage tank is heated to a boiling temperature that is a predetermined temperature, water is heated by each heat pump circuit and supplied to the hot water storage tank. In this way, by providing a plurality of heat pump circuits, for example, one heat pump circuit heats water to 60% of the boiling temperature, and the other heat pump circuit heats the remaining 40%, and so on. The heat pump circuit can share the driving capability required during boiling operation. Therefore, it becomes possible to determine the share of operating capacity so that the operating efficiency in each heat pump circuit is the best, and the operating efficiency of the heat pump cycle device during the boiling operation can be improved.

JP 2005-337626 A

  In the heat pump cycle device described in Patent Document 1, when hot water is supplied from a plurality of heat pump circuits to a heating terminal or a hot water supply terminal, water / refrigerant heat exchange in each heat pump circuit is performed according to the temperature required at the heating terminal or the hot water supply terminal. The target temperature of the going-out temperature, which is the temperature of the hot water flowing out from the vessel, is determined, and the compressor of each heat pump circuit is controlled so that the going-out temperature becomes the target temperature. Specifically, when the temperature difference between the forward temperature and the target temperature is large, the compressor is continuously operated at a predetermined high rotation speed (for example, 70 rpm). Then, the rotational speed of the compressor is decreased as the forward temperature approaches the target temperature, and after the forward temperature reaches the target temperature, the upper temperature is higher than the target temperature by a predetermined upper limit temperature and the lower limit temperature is lower than the predetermined temperature. The number of rotations of the compressor is increased or decreased so that the temperature is between.

  When the compressor is controlled so that the forward temperature falls between the upper limit temperature and the lower limit temperature, the temperature change of the forward temperature is small, that is, the operating capacity required by the heat pump cycle device is small. In this case, the operation efficiency of the heat pump cycle device is improved by operating only one of the heat pump circuits and stopping the compressors of the other heat pump circuits, instead of operating by sharing the load with a plurality of heat pump circuits. There is a case. However, in a heat pump cycle device that supplies hot water from a plurality of heat pump circuits to a heating terminal or a hot water supply terminal, hot water also flows through the water refrigerant heat exchanger of the stopped heat pump circuit. May radiate heat and the temperature may decrease. If the temperature of the hot water falls below the lower limit temperature, the operation of the heat pump cycle device is performed by increasing the number of revolutions of the compressor in order to raise the temperature of the hot water to the target temperature again. There was a possibility of deteriorating efficiency.

  An object of the present invention is to solve the above-described problems, and to provide a heat pump cycle device that prevents the hot water temperature from being lowered by the stopped heat pump circuit and suppresses the deterioration of the operation efficiency.

  This invention solves the above-mentioned subject, Comprising: The heat pump cycle apparatus of this invention has a some heat pump circuit and a heating hot water circuit, Comprising: A some heat pump circuit is respectively a compressor, water, The refrigerant heat exchanger, the flow rate adjusting means, and the heat source side heat exchanger are sequentially connected by refrigerant piping, and the heating hot water circuit includes a load terminal, a circulation pump, and a plurality of water refrigerant heat exchangers. It is configured by sequentially connecting with hot water piping, and has a bypass pipe that bypasses the water heat exchanger of at least one heat pump circuit among the plurality of heat pump circuits. When operating the load terminal, when operating all of the plurality of heat pump circuits, prevent hot water from flowing through the bypass pipe, and when at least one of the plurality of heat pump circuits is stopped, bypass By flowing warm water through the pipe, the warm water is prevented from flowing into the water refrigerant heat exchanger of the heat pump circuit.

  The heat pump cycle device of the present invention has a bypass pipe that bypasses the water-refrigerant heat exchanger of the heat pump circuit, and when the heat pump circuit is stopped, the heat pump circuit is stopped so that hot water flows through the bypass pipe Bypass the water refrigerant heat exchanger. Thereby, a warm water does not flow through the said water-refrigerant heat exchanger, and a warm water temperature does not fall, but the deterioration of the operating efficiency of a heat pump cycle apparatus is suppressed.

It is a lineblock diagram of the heat pump cycle device in an embodiment of the present invention, and represents the flow of a refrigerant and warm water when operating the 1st heat pump circuit and the 2nd heat pump circuit. It is a block diagram of the heat pump cycle apparatus in embodiment of this invention, and represents the flow of a refrigerant | coolant and warm water when only the 1st heat pump circuit is drive | operating.

  Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. As an embodiment, a heat pump that has an indoor unit that is a load terminal in the present invention and two heat pump circuits, and performs heating by circulating hot water generated by at least one of the two heat pump circuits to the indoor unit A cycle apparatus will be described as an example. The present invention is not limited to the following embodiments, and can be variously modified without departing from the gist of the present invention.

  FIG. 1 shows a configuration of a heat pump cycle apparatus according to the present invention. The heat pump cycle apparatus 100 includes a first heat pump circuit 10a, a second heat pump circuit 10b, and a heating / hot water circuit 30. The first heat pump circuit 10a and the second heat pump circuit 10b can be operated independently.

  In the first heat pump circuit 10a, a compressor 1a, a water refrigerant heat exchanger 2a, an expansion valve 3a that is a flow rate adjusting means, a heat source side heat exchanger 4a, and an accumulator 5a are sequentially connected by a refrigerant pipe 11a. Configured. The compressor 1a is a variable-capacity compressor that can vary the driving capability by being driven by a motor (not shown) whose rotation speed is controlled by an inverter. The water-refrigerant heat exchanger 2a has a refrigerant-side flow path 2aa connected to the refrigerant pipe 11a, and a water-side flow path 2ab connected to a hot water pipe 31 of the heating / warming water circuit 30 described later. Heat is exchanged between the refrigerant flowing through 2aa and the water flowing through the water-side flow path 2ab. The expansion valve 3a is an electronic expansion valve, and the amount of refrigerant flowing into the heat source side heat exchanger 4a is adjusted by adjusting the opening thereof. The heat source side heat exchanger 4a exchanges heat between the refrigerant and the air flowing into the heat source side heat exchanger 4a by the rotation of the outdoor fan 6a disposed in the vicinity of the heat source side heat exchanger 4a. The accumulator 5a separates the refrigerant flowing in from the heat source side heat exchanger 4a into liquid refrigerant and gas refrigerant, and causes only the gas refrigerant to be sucked into the compressor 1a.

  The first heat pump circuit 10a includes a discharge temperature sensor 51a, a refrigerant temperature sensor 52a, a heat exchange temperature sensor 53a, and an outside air temperature sensor 54a. The discharge temperature sensor 51a is provided in the refrigerant pipe 11a near the refrigerant discharge side of the compressor 1a, and detects the temperature of the refrigerant discharged from the compressor 1a. The refrigerant temperature sensor 52a is provided in the refrigerant pipe 11a between the water refrigerant heat exchanger 2a and the expansion valve 3a, and detects the temperature of the refrigerant flowing out from the water refrigerant heat exchanger 2a. The heat exchanger temperature sensor 53a is provided in the refrigerant pipe 11a between the expansion valve 3a and the heat source side heat exchanger 4a, and detects the temperature of the refrigerant flowing into the heat source side heat exchanger 5a. The outside air temperature sensor 54a is disposed in the vicinity of the heat source side heat exchanger 5a and detects an outside air temperature that is an outdoor temperature.

  In the second heat pump circuit 10b, a compressor 1b, a water refrigerant heat exchanger 2b, an expansion valve 3b that is a flow rate adjusting means, a heat source side heat exchanger 4b, and an accumulator 5b are sequentially connected by a refrigerant pipe 11b. Configured. The compressor 1b is a variable capacity compressor capable of varying the driving capacity by being driven by a motor (not shown) whose rotation speed is controlled by an inverter. The water-refrigerant heat exchanger 2b has a refrigerant-side flow path 2ba connected to the refrigerant pipe 11b and a water-side flow path 2bb connected to a hot water pipe 31 of the heating / warming water circuit 30 described later, Heat exchange is performed between the refrigerant flowing through 2ba and the water flowing through the water-side flow path 2bb. The expansion valve 3b is an electronic expansion valve, and the amount of refrigerant flowing into the heat source side heat exchanger 4b is adjusted by adjusting the opening thereof. The heat source side heat exchanger 4b exchanges heat between the refrigerant and the air flowing into the heat source side heat exchanger 4b by the rotation of the outdoor fan 6b disposed in the vicinity of the heat source side heat exchanger 4b. The accumulator 5b separates the refrigerant flowing in from the heat source side heat exchanger 4b into liquid refrigerant and gas refrigerant, and causes only the gas refrigerant to be sucked into the compressor 1b.

  The second heat pump circuit 10b includes a discharge temperature sensor 51b, a refrigerant temperature sensor 52b, a heat exchange temperature sensor 53b, and an outside air temperature sensor 54b. The discharge temperature sensor 51b is provided in the refrigerant pipe 11b near the refrigerant discharge side of the compressor 1b, and detects the temperature of the refrigerant discharged from the compressor 1b. The refrigerant temperature sensor 52b is provided in the refrigerant pipe 11b between the water refrigerant heat exchanger 2b and the expansion valve 3b, and detects the temperature of the refrigerant flowing out of the water refrigerant heat exchanger 2b. The heat exchanger temperature sensor 53b is provided in the refrigerant pipe 11b between the expansion valve 3b and the heat source side heat exchanger 4b, and detects the temperature of the refrigerant flowing into the heat source side heat exchanger 5b. The outside air temperature sensor 54b is disposed in the vicinity of the heat source side heat exchanger 5b and detects the outside air temperature that is an outdoor temperature.

  In the heating / warm water circuit 30, the indoor unit 21, the circulation pump 22, the water / refrigerant heat exchanger 2 a, the three-way valve 23 that is a flow path switching unit, and the water / refrigerant heat exchanger 2 b are sequentially connected by a hot water pipe 31. Configured. The indoor unit 21 includes a floor heating panel and a radiator, and warm water flowing through the indoor unit 21 heats the air in the room in which the indoor unit 21 is installed, thereby heating the room. The circulation pump 22 is a variable capacity pump, and the hot water circulates in the heating / hot water circuit 30 when the circulation pump 22 is driven. Water refrigerant heat exchangers 2a and 2b are arranged between circulation pump 22 and indoor unit 21, and water side flow path 2ab of water refrigerant heat exchanger 2a and water side flow path 2bb of water refrigerant heat exchanger 2b are provided. They are connected in series and connected to the hot water pipe 31.

  The three-way valve 23 has three ports: a port a that is a first connection port, a port b that is a second connection port, and a port c that is a third connection port. The port a is connected to the water-side flow path 2ab of the water-refrigerant heat exchanger 2a by a hot water pipe 31. The port b is connected to the water-side flow path 2bb of the water-refrigerant heat exchanger 2b by the hot water pipe 31. One end of a bypass pipe 32 that bypasses the water refrigerant heat exchanger 2 b is connected to the port c, and the other end of the bypass pipe 32 is a hot water pipe 31 between the water refrigerant heat exchanger 2 b and the indoor unit 21. It is connected to the. In FIG. 1, the three-way valve 23 is in a state where the port c is closed and the ports a and b are in communication (in FIG. 1, the open port is outlined and the closed port c is black. Paint).

  The heating / warming water circuit 30 includes a first forward temperature sensor 55 and a second forward temperature sensor 56. The first forward temperature sensor 55 is provided in the hot water pipe 31 in the vicinity of the water refrigerant heat exchanger 2a on the three-way valve 23 side, and detects the first forward temperature that is the water temperature flowing out from the water refrigerant heat exchanger 2a. The second forward temperature sensor 56 is provided in the hot water pipe 31 in the vicinity of the water refrigerant heat exchanger 2b on the indoor unit 21 side, and detects the second forward temperature, which is the water temperature flowing out from the water refrigerant heat exchanger 2b.

  Next, the operation | movement operation | movement when the heat pump cycle apparatus 100 of this embodiment is performing the heating operation by the indoor unit 21 is demonstrated. First, referring to FIG. 1, each component device in the first heat pump circuit 10a, the second heat pump circuit 10b, and the heating / warming water circuit 30 when the first heat pump circuit 10a and the second heat pump circuit 10b are operated. The operation of the refrigerant and the flow of refrigerant and hot water associated therewith will be described. Next, referring to FIG. 2, the operation of each component device in the first heat pump circuit 10a and the heating / warming water circuit 30 when only the first heat pump circuit 10a is operating, and the flow of the refrigerant and warm water associated therewith Will be described.

  In FIGS. 1 and 2, the arrows indicate the direction in which the refrigerant or hot water flows in each circuit. In the three-way valve 23, the open port is outlined and the closed port is black. Further, in the following description, the heating operation set temperature Ti set by the user in the indoor unit 21 is 24 ° C., and the target that is the target value of the hot water temperature flowing into the indoor unit 21 in order to realize this set temperature Ti. The hot water temperature Tt is 40 ° C., a temperature higher than the target hot water temperature Tt by a predetermined temperature (for example, 2 ° C.) is an upper limit temperature Tt1, a temperature lower than the target hot water temperature Tt by a predetermined temperature (for example, 2 ° C.) is a lower limit temperature Tt2, and a first heat pump The temperature of hot water flowing out from the water refrigerant heat exchanger 2b when operating the circuit 10a and the second heat pump circuit 10b or the water refrigerant flowing out of the water refrigerant heat exchanger 2a when operating only the first heat pump circuit 10a The temperature of the hot water is defined as the going temperature Tg.

  As shown in FIG. 1, the first heat pump circuit 10a and the second heat pump circuit 10b are operated until the heating temperature is started in the heat pump cycle apparatus 100 and the forward temperature Tg reaches the target temperature Tt. At this time, the three-way valve 23 of the hot water heating circuit 30 is in a state where the port c is closed and the port a and the port b communicate with each other. And compressor 1a, 1b of the 1st heat pump circuit 10a and the 2nd heat pump circuit 10b and the circulation pump 22 of the heating hot water circuit 30 are driven.

  In the first heat pump circuit 10a and the second heat pump circuit 10b, the refrigerant compressed and discharged by the compressors 1a and 1b flows into the refrigerant side flow paths 2aa and 2ba of the water refrigerant heat exchangers 2a and 2b. The refrigerant flowing into the refrigerant side flow paths 2aa and 2ba of the water refrigerant heat exchangers 2a and 2b is condensed by performing heat exchange with water flowing through the water side flow paths 2ab and 2bb of the water refrigerant heat exchangers 2a and 2b, It flows out from water refrigerant heat exchanger 2a, 2b.

  The refrigerant that has flowed out of the water-refrigerant heat exchangers 2a and 2b is decompressed and flows into the heat source side heat exchangers 4a and 4b when passing through the expansion valves 3a and 3b. The refrigerant flowing into the heat source side heat exchangers 4a and 4b evaporates by exchanging heat with the air flowing into the heat source side heat exchangers 4a and 4b by the rotation of the outdoor fans 6a and 6b, and the heat source side heat exchangers 4a and 4b. It flows out from 4b. And the refrigerant | coolant which flowed out from the heat source side heat exchanger 4a, 4b is suck | inhaled by the compressor 1a, 1b via the accumulator 5a, 5b, and is compressed again.

On the other hand, in the heating / warming water circuit 30, the water flowing into the water-side flow path 2ab of the water-refrigerant heat exchanger 2a by driving the circulation pump 22 exchanges heat with the refrigerant flowing through the refrigerant-side flow path 2aa of the water-refrigerant heat exchanger 2a. To be heated. At this time, the rotation speed of the compressor 1a and the expansion valve 3a are adjusted so that the temperature of the hot water flowing out from the water-side flow path 2ab becomes the first predetermined temperature T1 (for example, 30 ° C.) lower than the target hot water temperature Tt. The opening degree and the rotational speed of the outdoor fan 6a are controlled.
The hot water flowing out from the water-refrigerant heat exchanger 2a flows into the water-side flow path 2bb of the water-refrigerant heat exchanger 2b through the three-way valve 23.

The water flowing into the water-side channel 2bb of the water-refrigerant heat exchanger 2b is further heated by exchanging heat with the refrigerant flowing through the refrigerant-side channel 2ba of the water-refrigerant heat exchanger 2b. At this time, the rotation speed of the compressor 1b and the opening degree of the expansion valve 3b are set so that the temperature of the warm water flowing out from the water-side flow path 2bb becomes the warm water of the second predetermined temperature T2 (= target warm water temperature Tt: 40 ° C.). , And the rotational speed of the outdoor fan 6b is controlled. Note that the temperature of the warm water flowing out from the water-side channel 2bb described above is the forward temperature Tg when the first heat pump circuit 10a and the second heat pump circuit 10b are operating.
The hot water flowing out of the water-refrigerant heat exchanger 2b flows into the indoor unit 21, and the hot water flowing into the indoor unit 21 dissipates heat, thereby heating the room where the indoor unit 21 is installed.

  As described above, when only the heating operation is performed in the heat pump cycle device 100, the first heat pump circuit 10a and the second heat pump circuit 10b share the operation capacity until the forward temperature Tg reaches the target temperature Tt. Then, the temperature of the hot water flowing into the indoor unit 21, that is, the forward temperature Tg is raised to the target hot water temperature Tt. In the present embodiment, water is raised to the first predetermined temperature T1 by the first heat pump circuit 10a, and the hot water heated by the first heat pump circuit 10a is raised to the second predetermined temperature T2 by the second heat pump circuit 10b. At this time, the operating efficiency of the heat pump cycle device 100 is improved by determining the first predetermined temperature T1 so that the operating efficiencies of the first heat pump circuit 10a and the second heat pump circuit 10b are the best.

  When the heating operation is performed by operating the first heat pump circuit 10a and the second heat pump circuit 10b and the forward temperature Tg reaches the target temperature Tt, the second heat pump circuit 10b is stopped and the second heat pump circuit 10b is stopped as shown in FIG. Only one heat pump circuit 10a is operated, and the going-out temperature Tg is controlled to be within a temperature range determined by the upper limit temperature Tt1 and the lower limit temperature Tt2. Specifically, when the forward temperature Tg becomes equal to or higher than the upper limit temperature Tt1, the rotational speed of the compressor 1a is decreased, and the opening degree of the expansion valve 3a and the rotational speed of the outdoor fan 6a are controlled accordingly. Thus, the forward temperature Tg is lowered to the target hot water temperature Tt. Further, when the going-out temperature Tg becomes equal to or lower than the lower limit temperature Tt2, the rotational speed of the compressor 1a is increased, and the opening degree of the expansion valve 3a and the rotational speed of the outdoor fan 6a are controlled accordingly. The forward temperature Tg is increased so as to reach the target hot water temperature Tt.

  When the heat pump cycle apparatus 100 is controlled to keep the going temperature Tg within the predetermined temperature range, the temperature change of the going temperature Tg is small (in this embodiment, ± 2 ° C. with respect to the target hot water temperature Tt). In addition, the driving capability required by the first heat pump circuit 10a and the second heat pump circuit 10b is small. In this case, the second heat pump circuit 10b is not operated by sharing the operation capacity between the first heat pump circuit 10a and the second heat pump circuit 10b, but only the first heat pump circuit 10a is operated by stopping the second heat pump circuit 10b. The operating efficiency of the heat pump cycle apparatus 100 is improved with zero power consumption.

  As described above, when only the first heat pump circuit 10a is operated, as shown in FIG. 2, the port b of the three-way valve 23 is closed and the port a and the port c communicate with each other. Thereby, the hot water flowing out from the water-refrigerant heat exchanger 2a flows through the bypass pipe 32 via the three-way valve 23, flows into the hot water pipe 31 from the bypass pipe 32, and flows into the indoor unit 21. That is, the hot water flowing out from the water refrigerant heat exchanger 2a flows into the indoor unit 21 without flowing through the water refrigerant heat exchanger 2b (the water side flow path 2bb) of the stopped second heat pump circuit 10b.

  In the stopped second heat pump circuit 10b, since the refrigerant does not circulate through the refrigerant pipe 11b, the high-temperature and high-pressure refrigerant does not flow through the refrigerant-side flow path 2ba of the water-refrigerant heat exchanger 2b. In this state, if the hot water flowing out from the water refrigerant heat exchanger 2a flows into the water side channel 2ba of the water refrigerant heat exchanger 2b, the hot water temperature is lowered. And the warming capacity in the indoor unit 21 falls because the warm water in which the temperature fell flows in into the indoor unit 21. Further, since the temperature of the hot water flowing out from the indoor unit 21 is decreased, the amount of hot water heated in the water / refrigerant heat exchanger 2a is increased, and the rotational speed of the compressor 1a is increased more than necessary. The operating efficiency of the apparatus 100 is deteriorated.

  However, in the heat pump cycle device 100 of the present invention, as described above, when the second heat pump circuit 10b is stopped, the three-way valve 23 is switched so that hot water flows through the bypass pipe 32, thereby The hot water is prevented from flowing into the heat exchanger 2b. For this reason, the fall of the heating capability in the indoor unit 21 resulting from a warm water temperature falling with the water refrigerant | coolant heat exchanger 2b, and the deterioration of the operating efficiency of the heat pump cycle apparatus 100 can be prevented.

  As described above, the heat pump cycle device of the present invention has a bypass pipe that bypasses the water-refrigerant heat exchanger of the heat pump circuit, and when the heat pump circuit is stopped, the heat pump cycle apparatus is stopped so that hot water flows through the bypass pipe. Bypass the water refrigerant heat exchanger of the heat pump circuit. Thereby, a warm water does not flow through the said water-refrigerant heat exchanger, and a warm water temperature does not fall, but the deterioration of the operating efficiency of a heat pump cycle apparatus is suppressed.

  In the above-described embodiment, the heat pump cycle apparatus 100 that supplies hot water to the indoor unit 21 using the first heat pump circuit 10a and the second heat pump circuit 10b has been described as an example, but there are three or more heat pump circuits. A bypass pipe may be arranged so as to be able to bypass the water side flow path of the water refrigerant heat exchanger of the heat pump circuit that exists and stops. Further, instead of the indoor unit 21, a hot water supply terminal such as a hot water storage tank or a hot water supply device for a bath may be used.

1a, 1b Compressor 2a, 2b Water refrigerant heat exchanger 2aa, 2ba Refrigerant side channel 2ab, 2bb Water side channel 10a First heat pump circuit 10b Second heat pump circuit 11a, 11b Refrigerant piping 21 Indoor unit 22 Circulation pump 23 Three-way Valve 23a Water side flow path 23b Refrigerant side flow path 30 Heating hot water circuit 31 Hot water piping 40 Hot water supply refrigerant circuit 41 Outgoing refrigerant piping 42 Returning refrigerant piping 55 First outgoing temperature sensor 56 Second outgoing temperature sensor 57 Third outgoing temperature sensor 100, 200 heat pump cycle device Ti set temperature Tt target hot water temperature Tt1 upper limit temperature Tt2 lower limit temperature Tg forward temperature

Claims (2)

A heat pump cycle device having a plurality of heat pump circuits and a heating and hot water circuit,
Each of the plurality of heat pump circuits is configured by sequentially connecting a compressor, a water refrigerant heat exchanger, a flow rate adjusting means, and a heat source side heat exchanger with refrigerant piping,
The heating hot water circuit is configured by sequentially connecting a load terminal, a circulation pump, and a plurality of the water refrigerant heat exchangers with hot water pipes,
A bypass pipe for bypassing the water heat exchanger of at least one of the heat pump circuits among the plurality of heat pump circuits;
When driving the load terminal,
When operating all of the plurality of heat pump circuits, make sure that warm water does not flow through the bypass pipe,
When at least one of the plurality of heat pump circuits is stopped, the hot water is allowed to flow to the bypass refrigerant pipe so that the hot water does not flow to the water refrigerant heat exchanger of the heat pump circuit.
The heat pump cycle apparatus characterized by the above-mentioned. The heating and hot water circuit has flow path switching means,
The flow path switching means has at least a first connection port, a second connection port, and a third connection port,
The first connection port and the second connection port are each connected to the water refrigerant heat exchanger of the heat pump circuit by a hot water pipe, and one end of the bypass pipe is connected to the third connection port.
The heat pump cycle device according to claim 1.

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