Refrigeration cycle device

Abstract

The present disclosure obtains a refrigeration cycle device in which refrigerant deficiencies occurring when a refrigerant circulation circuit is switched are suppressed.　A refrigeration cycle device according to one embodiment of the present disclosure comprises a compressor 1, a heat-source-side heat exchanger 2, a first usage-side heat exchanger 21, a second usage-side heat exchanger 31, and a flow path switching device. The flow path switching device switches between: a first refrigerant circulation circuit, which includes the second usage-side heat exchanger 31, and in which the second usage-side heat exchanger 31 functions as either an evaporator or a condenser; and a second refrigerant circulation circuit, which includes the heat-source-side heat exchanger 2 and the first usage-side heat exchanger 21 but does not include the second usage-side heat exchanger 31, and in which either the heat-source-side heat exchanger 2 or the first usage-side heat exchanger 21 functions as an evaporator. When the second refrigerant circulation circuit is formed, the second usage-side heat exchanger 31 communicates with a flow path between the heat-source-side heat exchanger 2 and the compressor, and also communicates with a flow path between the compressor 1 and the heat exchanger functioning as the evaporator of the second refrigerant circulation circuit.

Description

The present disclosure relates to a refrigeration cycle device. [Background Art]

[0002] Conventionally, for example, as disclosed in Patent Document 1, a refrigeration cycle device including a heat source-side heat exchanger (corresponding to an outdoor heat exchanger of Patent Document 1) that performs heat exchange between a heat source heat medium such as air in an outdoor space and a refrigerant, a first utilizationside heat exchanger (corresponding to an indoor heat exchanger for air conditioning in Patent Document 1) that performs heat exchange with a first load heat medium such as air in an indoor space, and a second utilization-side heat exchanger (corresponding to a hot water supply heat exchanger of Patent Document 1) that performs heat exchange with a second load heat medium such as water is known. Such a refrigeration cycle device has a four-way valve and an electromagnetic valve that switches between flow paths, and a refrigerant circulation circuit (corresponding to a portion in which a refrigerant flows in a heating operation of Patent Document 1) that heats the first load heat medium and a refrigerant circulation circuit (corresponding to a portion in which a refrigerant flows in a hot water supply operation of Patent Document 2) that heats the second load heat medium are switched by switching between the four-way valve and the electromagnetic valve. [Citation List] 06 09 24 [Patent Document]

[0003] [Patent Document 1] PCT International Publication No. WO2017 / 203655 [Summary of Invention] [Technical Problem]

[0004] The refrigeration cycle device of Patent Document 1 has a flow path (corresponding to a flow path from a second electromagnetic valve to a third pressure reducing device in Patent Document 1) including the second utilization-side heat exchanger and of which both ends are closed in a state in which the refrigerant circulation circuit that heats the first load heat medium is formed, and has a flow path (corresponding to a flow path from a first electromagnetic valve to a second pressure reducing device in Patent Document 1) including the first utilization-side heat exchanger and of which both ends are closed in the state in which the refrigerant circulation circuit that heats the second load heat medium is formed. In the case in which the flow path including the heat exchanger and of which both ends are closed is provided in this way, and the refrigerant accumulates in the heat exchanger included in the flow path of which both ends are closed when the refrigerant circulation circuit is switched, the accumulated refrigerant cannot be used for an operation, resulting in a shortage of refrigerant.

[0005] An object of the present disclosure is to obtain a refrigeration cycle device that curbs having a shortage of refrigerant when a refrigerant circulation circuit is switched. [Solution to Problem]

[0006] 06 09 24 A refrigeration cycle device according to one aspect of the present disclosure is set forth in the claims. [Advantageous Effects of Invention]

[0007] In the refrigeration cycle device according to one aspect of the present disclosure, even when a second refrigerant circulation circuit that does not include a third heat exchanger is formed, the refrigerant accumulated in the third heat exchanger flows into a flow path between a heat exchanger functioning as an evaporator and a suction port of a compressor, and thus it is possible to suppress a shortage of refrigerant when the refrigerant circulation circuit is switched. [Brief Description of Drawings]

[0008] FIG. lisa refrigerant circuit diagram of a refrigeration cycle device according to an embodiment. FIG. 2 is a hardware configuration diagram of a control device of the refrigeration cycle device according to the embodiment. FIG. 3 is a functional block diagram of the refrigeration cycle device according to the embodiment. FIG. 4 is a refrigerant circuit diagram during a first load heat medium cooling operation of the refrigeration cycle device according to the embodiment. FIG. 5 is a refrigerant circuit diagram during the first load heat medium heating operation of the refrigeration cycle device according to the embodiment. FIG. 6 is a refrigerant circuit diagram during a second load heat medium heating operation of the refrigeration cycle device according to the embodiment. FIG. 7 is a refrigerant circuit diagram during a cooling and heating simultaneous 06 09 24 operation of the refrigeration cycle device according to the embodiment. FIG. 8 is a refrigerant circuit diagram of a refrigeration cycle device according to a first modified example of the embodiment. FIG. 9 is a refrigerant circuit diagram of a refrigeration cycle device according to a second modified example of the embodiment. FIG. 10 is a refrigerant circuit diagram of a refrigeration cycle device according to a third modified example of the embodiment. FIG. 11 is a refrigerant circuit diagram of a refrigeration cycle device according to a fourth modified example of the embodiment. [Description of Embodiments]

[0009] A refrigeration cycle device according to an embodiment of the present disclosure will be described with reference to the drawings. The present disclosure is not limited to the following embodiments, and modifications or omissions can be made without departing from the scope of the present disclosure. Furthermore, it is also possible to appropriately combine configurations and additional configurations of the refrigeration cycle devices according to the respective embodiments and modified examples. In addition, the same reference numerals are assigned to elements common to each of the drawings, and duplicate descriptions thereof will be omitted.

[0010] Embodiments FIG. lisa refrigerant circuit diagram of a refrigeration cycle device according to an embodiment. The refrigeration cycle device 1000 includes a heat source device 100, a first utilization device 200, a second utilization device 300, a remote controller 400, a first connecting pipe 501, a second connecting pipe 502, a third connecting pipe 06 09 24 503, and a fourth connecting pipe 504. In the refrigeration cycle device 1000, a refrigerant circulation circuit 600 in which a refrigerant circulates is formed by the heat source device 100, the first utilization device 200, the second utilization device 300, the first connecting pipe 501, the second connecting pipe 502, the third connecting pipe 503, and the fourth connecting pipe 504.

[0011] In addition, the refrigeration cycle device 1000 can perform four types of operations by switching the refrigerant circulation circuit 600, and the four types of operations are respectively referred to as a first load heat medium cooling operation, a first load heat medium heating operation, a second load heat medium heating operation, and a cooling and heating simultaneous operation. Since the refrigerant circulation circuit 600 differs for each of the four types of operation, in the case of separate description, the refrigerant circulation circuit 600 during the first load heat medium cooling operation will be referred to as a first load heat medium cooling refrigerant circulation circuit 601, the refrigerant circulation circuit 600 during the first load heat medium heating operation will be referred to as a first load heat medium heating refrigerant circulation circuit 602, the refrigerant circulation circuit 600 during the second load heat medium heating operation will be referred to as a second load heat medium heating refrigerant circulation circuit 603, and the refrigerant circulation circuit 600 during the cooling and heating simultaneous operation will be referred to as a cooling and heating simultaneous refrigerant circulation circuit 604.

[0012] The heat source device 100 will be described. The heat source device 100 compresses the refrigerant and causes heat exchange between the heat source heat medium passing through the heat source device 100 and the refrigerant. In the 06 09 24 embodiment, the heat source device 100 is an outdoor unit, and the heat source heat medium is air in an outdoor space. The heat source device 100 includes a compressor 1, a heat source-side heat exchanger 2, a pressure reducing device 3, a switching valve group 4, an accumulator 5, a closing device 6, a compressor shell temperature sensor 7, a discharge temperature sensor 8, a discharge pressure sensor 9, a heat source-side heat exchanger temperature sensor 10, a heat source heat medium temperature sensor 11, a heat source-side liquid pipe temperature sensor 12, and a control device 13. Further, in the heat source device 100, each of the compressor 1, the heat source-side heat exchanger 2, the pressure reducing device 3, the switching valve group 4, the accumulator 5, and the closing device 6 is connected by a heat source device refrigerant pipe 110 so that the refrigerant can flow therethrough. As will be described later, since the refrigerant circulation circuit 600 is switched by the pressure reducing device 3 and the switching valve group 4, the pressure reducing device 3 and the switching valve group 4 correspond to a flow path switching device for switching the refrigerant circulation circuit.

[0013] The compressor 1 suctions the refrigerant through a suction port, compresses the suctioned refrigerant into a high-temperature and high-pressure gas state, and discharges the compressed refrigerant through a discharge port. Further, the compressor 1 of the embodiment includes a compression part that compresses a refrigerant, an electric motor that drives the compression part, and a shell that covers the compression part and the electric motor. As the compression part of the compressor 1, a known compression part such as a rotary type, scroll type, screw type or vane type is used. A rotation speed of the electric motor of the compressor 1 can be changed by inverter control, and a capacity of the compressor 1 can be controlled by changing the rotation speed of the electric motor. 06 09 24 The heat source-side heat exchanger 2 causes heat exchange between the heat source heat medium and the refrigerant passing through a flow path formed in the heat source-side heat exchanger 2. The heat source-side heat exchanger 2 of the embodiment causes heat exchange between the air in the outdoor space and the refrigerant. The heat source-side heat exchanger 2 of the embodiment includes a main heat exchanger and a sub heat exchanger that causes heat exchange between the air in the outdoor space and the refrigerant, and a header and a distributor that distribute the refrigerant flowing into the main heat exchanger and collect the refrigerant flowing in from a heat transfer pipe. Further, the heat source-side heat exchanger 2 of the embodiment is configured of a fin-and-tube type heat exchanger. The fin-and-tube type heat exchanger is a heat exchanger that has a plurality of heat transfer pipes in which a flow path for a flow of a refrigerant is formed and a plurality of radiation fins provided in a direction orthogonal to the heat transfer pipes. In the embodiment, one end portion of the flow path of the main heat exchanger of the heat source-side heat exchanger 2 is connected to the header, and the other end portion thereof is connected to one end portion of the distributor. One end portion of the flow path of the sub heat exchanger is connected to the other end portion of the distributor. That is, in the embodiment, one end portion of the heat source-side heat exchanger 2 is the header, and the other end portion thereof is the other end portion of the flow path of the sub heat exchanger. Further, the air in the outdoor space is blown to the main heat exchanger and the sub heat exchanger of the heat source-side heat exchanger 2 by a blowing means such as a blower (not shown).

[0015] The pressure reducing device 3 decompresses the refrigerant passing 06 09 24 therethrough. The pressure reducing device 3 of the embodiment is configured of three expansion valves, which are respectively referred to as a first expansion valve 3a, a second expansion valve 3b, and a third expansion valve 3c. Each of the expansion valves is an electronic expansion valve that has a flow path hole forming a flow path through which a refrigerant flows and a valve body movable to open and close the flow path hole and can arbitrarily adjust an opening area of the flow path by a position of the valve body being controlled. For the sake of explanation, a degree of opening is used as an index that represents the opening area of the expansion valve. As the degree of opening increases, the opening area of the flow path of the expansion valve increases. It is assumed that the opening area is a maximum when the degree of opening is a maximum, and a pressure of the refrigerant passing through the expansion valve does not decrease when the degree of opening is a maximum. In addition, when the degree of opening is a minimum, it is ideally desirable that the expansion valve be completely closed, but in reality, a very small amount of refrigerant leaks from a gap because the gap is formed between the flow path hole and the valve body. Thus, most of the refrigerant cannot pass through the expansion valve when the degree of opening is a minimum, but a very small amount of refrigerant passes through the expansion valve.

[0016] The switching valve group 4 switches the flow path of the refrigerant. The switching valve group 4 of the embodiment is configured of two four-way valves which are respectively referred to as a first four-way valve 4a and a second four-way valve 4b. The four-way valve has four ports including an A port, a B port, a C port and a D port. In addition, the four-way valve can switch between a state in which the A port and the B port communicate with each other and the C port and the D port communicate with each other, and a state in which the A port and the D port communicate with each other and the 06 09 24 B port and the C port communicate with each other. The four ports of the first four-way valve 4a are numbered 4aa for the A port, 4ab for the B port, 4ac for the C port, and 4ad for the D port. Further, the four ports of the second four-way valve 4b are numbered 4ba for the A port, 4bb for the B port, 4bc for the C port, and 4bd for the D port.

[0017] When a gas-liquid mixed refrigerant flows in from an inlet, the accumulator 5 stores a liquid refrigerant therein and causes a gas refrigerant to flow out from an outlet. Thus, the accumulator 5 stores, as a liquid refrigerant, surplus refrigerant generated due to a difference in the amount of refrigerant used in the refrigerant circulation circuits including the first load heat medium cooling refrigerant circulation circuit 601, the first load heat medium heating refrigerant circulation circuit 602, the second load heat medium heating refrigerant circulation circuit 603, and the cooling and heating simultaneous refrigerant circulation circuit 604, or surplus refrigerant generated during a transitional period immediately after the refrigerant circulation circuit 600 is switched.

[0018] The closing device 6 opens and closes the heat source device refrigerant pipe 110. Due to the closing device 6 closing the heat source device refrigerant pipe 110, the refrigerant present inside the heat source device 100 does not flow out of the heat source device 100. The closing device 6 of the embodiment is configured of four stop valves, which are referred to as a first stop valve 6a, a second stop valve 6b, a third stop valve 6c and a fourth stop valve 6d.

[0019] The compressor shell temperature sensor 7 detects a temperature of the shell of compressor 1. The compressor shell temperature sensor 7 of the embodiment is disposed on a surface of the shell of the compressor 1. 06 09 24 The discharge temperature sensor 8 detects a temperature of the refrigerant discharged from the compressor 1. The discharge temperature sensor 8 of the embodiment is disposed in the heat source device refrigerant pipe 110 connected to the discharge port of compressor 1.

[0021] The discharge pressure sensor 9 detects a pressure of the refrigerant discharged from the compressor 1. The discharge pressure sensor 9 of the embodiment is disposed in the heat source device refrigerant pipe 110 connected to the discharge port of the compressor 1. Further, the pressure of the refrigerant detected by the discharge pressure sensor 9 is used when a condensation temperature of the refrigerant is derived, and the discharge pressure sensor 9 serves as a condensation temperature detection means.

[0022] The heat source-side heat exchanger temperature sensor 10 detects the temperature of the refrigerant flowing through the flow path formed in the heat sourceside heat exchanger 2. The heat source-side heat exchanger temperature sensor 10 of the embodiment is disposed on the heat transfer pipe or the radiation fin of the main heat exchanger of the heat source-side heat exchanger 2.

[0023] The heat source heat medium temperature sensor 11 detects a temperature of the heat source heat medium. The heat source heat medium temperature sensor 11 of the embodiment is disposed at a position through which the air in the outdoor space passes before heat exchange is performed in the heat source-side heat exchanger 2.

[0024] The heat source-side liquid pipe temperature sensor 12 detects a temperature of 06 09 24 the liquid refrigerant flowing through the heat source-side heat exchanger 2. The heat source-side liquid pipe temperature sensor 12 of the embodiment is disposed at the other end portion of the flow path formed in the main heat exchanger of the heat source-side heat exchanger 2 or at the distributor.

[0025] The control device 13 performs control for operating the refrigeration cycle device 1000. A detailed description of the control device 13 will be given below.

[0026] The heat source device refrigerant pipe 110 is configured of a first heat source device refrigerant pipe 111 to an eleventh heat source device refrigerant pipe 121.

[0027] One end portion of the first heat source device refrigerant pipe 111 is connected to the discharge port of the compressor 1, and the other end portion thereof is connected to the C port 4bc of the second four-way valve 4b. Further, the discharge temperature sensor 8 and the discharge pressure sensor 9 are disposed in the middle of the first heat source device refrigerant pipe 111.

[0028] One end portion of the second heat source device refrigerant pipe 112 is connected to the D port 4bd of the second four-way valve 4b, and the other end portion thereof is connected to one end portion of the heat source-side heat exchanger 2.

[0029] One end portion of the third heat source device refrigerant pipe 113 is connected to the other end portion of the heat source-side heat exchanger 2, and the other end portion thereof is connected to a branch between the third heat source device refrigerant pipe 113, the fourth heat source device refrigerant pipe 114, and the fifth heat source 06 09 24 device refrigerant pipe 115. Also, the first expansion valve 3a is disposed in the middle of the third heat source device refrigerant pipe 113.

[0030] One end portion of the fourth heat source device refrigerant pipe 114 is connected to the branch between the third heat source device refrigerant pipe 113, the fourth heat source device refrigerant pipe 114, and the fifth heat source device refrigerant pipe 115, and the other end portion thereof is connected to the first connecting pipe 501. In addition, the second expansion valve 3b and the first stop valve 6a are disposed in the middle of the fourth heat source device refrigerant pipe 114, and the second expansion valve 3b is disposed closer to one end portion of the fourth heat source device refrigerant pipe 114 than the first stop valve 6a.

[0031] One end portion of the fifth heat source device refrigerant pipe 115 is connected to the branch between the third heat source device refrigerant pipe 113, the fourth heat source device refrigerant pipe 114, and the fifth heat source device refrigerant pipe 115, and the other end portion thereof is connected to the third connecting pipe 503. Further, the third expansion valve 3c and the second stop valve 6b are disposed in the middle of the fifth heat source device refrigerant pipe 115, and the third expansion valve 3c is disposed closer to one end portion of the fifth heat source device refrigerant pipe 115 than the second stop valve 6b.

[0032] One end portion of the sixth heat source device refrigerant pipe 116 is connected to the second connecting pipe 502, and the other end portion thereof is connected to the B port 4ab of the first four-way valve 4a. The third stop valve 6c is disposed in the middle of the sixth heat source device refrigerant pipe 116. 06 09 24 One end portion of the seventh heat source device refrigerant pipe 117 is connected to the fourth connecting pipe 504, and the other end portion thereof is connected to the D port 4ad of the first four-way valve 4a. Further, the fourth stop valve 6d is disposed in the middle of the seventh heat source device refrigerant pipe 117.

[0034] One end portion of the eighth heat source device refrigerant pipe 118 is connected to the A port 4aa of the first four-way valve 4a, and the other end portion thereof is connected to the inlet of the accumulator 5.

[0035] One end portion of the ninth heat source device refrigerant pipe 119 is connected to the outlet of the accumulator 5, and the other end portion thereof is connected to the suction port of the compressor 1.

[0036] One end portion of the tenth heat source device refrigerant pipe 120 is connected to the C port 4ac of the first four-way valve 4a, and the other end portion thereof is connected to the B port 4bb of the second four-way valve 4b.

[0037] One end portion of the eleventh heat source device refrigerant pipe 121 is connected to the A port 4ba of the second four-way valve 4b, and the other end portion thereof is connected to the middle of the eighth heat source device refrigerant pipe 118.

[0038] Next, the first utilization device 200 will be described. The first utilization device 200 causes heat exchange between the refrigerant and the first load heat medium passing through the first utilization device 200. In the embodiment, it is assumed that 06 09 24 the first utilization device 200 is an indoor unit of an air conditioner, and the first load heat medium is air in an indoor space. The first utilization device 200 includes a first utilization-side heat exchanger 21, a first utilization-side heat exchanger temperature sensor 22, a first load heat medium temperature sensor 23, a first utilization-side liquid pipe temperature sensor 24 , a first utilization-side liquid refrigerant pipe 210, and a first utilization-side gas refrigerant pipe 220.

[0039] The first utilization-side heat exchanger 21 causes heat exchange between the refrigerant passing through the flow path formed in the first utilization-side heat exchanger 21 and the first load heat medium. The first utilization-side heat exchanger 21 of the embodiment causes heat exchange between the air in the indoor space and the refrigerant. In addition, the first utilization-side heat exchanger 21 of the embodiment is of a fin-and-tube type and includes a first utilization-side heat exchanger main body in which the flow path through which a refrigerant flows is formed, a distributor, and a header. The other end portion of the distributor is connected to one end portion of the first utilization-side heat exchanger body, and the header is connected to the other end portion of the first utilization-side heat exchanger main body. That is, in the embodiment, one end portion of the first utilization-side heat exchanger 21 is one end portion of the distributor, and the other end portion is the header. Also, the air in the indoor space is blown to the first utilization-side heat exchanger main body of the first utilization-side heat exchanger 21 by a blowing means such as a blower (not shown).

[0040] The first utilization-side heat exchanger temperature sensor 22 detects the temperature of the refrigerant flowing through the flow path formed in the first utilization-side heat exchanger 21. The first utilization-side heat exchanger temperature 06 09 24 sensor 22 of the embodiment is disposed on the heat transfer pipe or the radiation fin of the first utilization-side heat exchanger main body.

[0041] The first load heat medium temperature sensor 23 detects the temperature of the load heat medium passing through the first utilization device 200. The first load heat medium temperature sensor 23 of the embodiment is a temperature sensor that detects the air in the indoor space, and is disposed at a position through which the air in the indoor space passes before heat exchange is performed in the first utilization-side heat exchanger 21.

[0042] The first utilization-side liquid pipe temperature sensor 24 detects the temperature of the liquid refrigerant flowing into the first utilization-side heat exchanger 21. The first utilization-side liquid pipe temperature sensor 24 of the embodiment is disposed in the middle of the first utilization-side liquid refrigerant pipe 210 which will be described below.

[0043] One end portion of the first utilization-side liquid refrigerant pipe 210 is connected to the first connecting pipe 501, and the other end portion thereof is connected to one end portion of the first utilization-side heat exchanger 21.

[0044] One end portion of the first utilization-side gas refrigerant pipe 220 is connected to the other end portion of the first utilization-side heat exchanger 21, and the other end portion thereof is connected to the second connecting pipe 502.

[0045] Next, the second utilization device 300 will be described. The second 06 09 24 utilization device 300 causes heat exchange between the refrigerant and the second load heat medium passing through the second utilization device 300. In the embodiment, it is assumed that the second utilization device 300 is a heat source device of a water heater, and the second load heat medium passing through the second utilization device 300 is water. The second utilization device 300 includes a second utilization-side heat exchanger 31, a second utilization-side liquid pipe temperature sensor 32, a second load heat medium inflow-side temperature sensor 33, a second load heat medium outflow-side temperature sensor 34, a second utilization-side liquid refrigerant pipe 310, a second utilization-side gas refrigerant pipe 320, a second load heat medium inflow-side pipe 330, and a second load heat medium outflow-side pipe 340.

[0046] The second utilization-side heat exchanger 31 is formed with a refrigerant flow path and a load heat medium flow path, and causes heat exchange between the refrigerant passing through the refrigerant flow path and the second load heat medium passing through the load heat medium flow path. The second utilization-side heat exchanger 31 of the embodiment causes heat exchange between water and the refrigerant. Also, the second utilization-side heat exchanger 31 of the embodiment is a plate-type heat exchanger. The plate-type heat exchanger is a heat exchanger in which metal heat transfer plates having through holes formed in a thickness direction are stacked in the thickness direction.

[0047] The second utilization-side liquid pipe temperature sensor 32 detects the temperature of the liquid refrigerant flowing into the second utilization-side heat exchanger 31. The second utilization-side liquid pipe temperature sensor 32 of the embodiment is disposed in the middle of the second utilization-side liquid refrigerant 06 09 24 pipe 310 which will be described below.

[0048] The second load heat medium inflow-side temperature sensor 33 detects the temperature of the second load heat medium flowing into the second utilization-side heat exchanger 31. The second load heat medium inflow-side temperature sensor 33 of the embodiment is disposed in the middle of the second load heat medium inflow-side pipe 330 which will be described below.

[0049] The second load heat medium outflow-side temperature sensor 34 detects the temperature of the second load heat medium flowing out from the second utilization-side heat exchanger 31. The second load heat medium outflow-side temperature sensor 34 of the embodiment is disposed in the middle of the second load heat medium outflowside pipe 340 which will be described below.

[0050] One end portion of the second utilization-side liquid refrigerant pipe 310 is connected to the third connecting pipe 503, and the other end portion thereof is connected to one end portion of the refrigerant flow path of the second utilization-side heat exchanger 31.

[0051] One end portion of the second utilization-side gas refrigerant pipe 320 is connected to the other end portion of the refrigerant flow path of the first utilization-side heat exchanger 21, and the other end portion thereof is connected to the fourth connecting pipe 504.

[0052] One end portion of the second load heat medium inflow-side pipe 330 is 06 09 24 connected to a supply source (not shown) of the second load heat medium, and the other end portion thereof is connected to one end portion of the load heat medium flow path of the second utilization-side heat exchanger 31. The supply source of the second load heat medium supplies the second utilization device 300 with the second load heat medium. When the second load heat medium is water, the supply source of the second load heat medium may be a water source such as tap water or a tank in which water is stored.

[0053] One end portion of the second load heat medium outflow-side pipe 340 is connected to the other end portion of the load heat medium flow path of the second utilization-side heat exchanger 31, and the other end portion thereof is connected to a utilization terminal (not shown) of the second load heat medium. The utilization terminal of the second load heat medium uses the second load heat medium heat-exchanged by the second utilization device 300. When the second load heat medium is water, a faucet, a shower, or a tank in which heat-exchanged water is stored may be used as the utilization terminal of the second load heat medium.

[0054] Next, the remote controller 400 will be described. The remote controller 400 is a device for a user to confirm or operate a state of the refrigeration cycle device 1000. The remote controller 400 is connected to the control device 13 so as to be able to transmit and receive signals. The remote controller 400 of the embodiment includes a display part and an operation part (not shown). The display part displays information related to the operation of the refrigeration cycle device 1000, such as the type of operation of the refrigeration cycle device 1000 or the set temperature of the first utilization device 200. The information related to the operation of the refrigeration 06 09 24 cycle device 1000 is input to the operation part by an user’s operation. The display part is realized by, for example, a liquid crystal display, and the operation part is realized by a push-button switch or the like. Further, the display part and the operation part may be integrated, for example, by using a touch panel.

[0055] FIG. 2 is a hardware configuration diagram regarding the control device of the refrigeration cycle device according to the embodiment. A detailed description of the control device 13 will be given with reference to FIG. 2. The control device 13 includes a processor 13 a, a memory 13b, and a hardware interface 13 c. Each of the processor 13a, the memory 13b and the hardware interface 13c is connected so as to be able to exchange information.

[0056] The processor 13a is a device that controls components of the refrigeration cycle device 1000 such as the compressor 1 or performs data processing by executing programs stored in the memory 13b. A central processing unit (CPU), for example, is used for the processor 13 a.

[0057] The memory 13b stores programs executed by the processor 13 a and data necessary for executing the programs. Also, the memory 13b is used as a work region for the processor 13a. A non-volatile or volatile semiconductor memory such as a random access memory (RAM), a read only memory (ROM), and a flash memory is used for the memory 13b.

[0058] The hardware interface 13c transmits or receives signals to and from components of the refrigeration cycle device 1000. The hardware interface 13c and 06 09 24 components for transmitting or receiving signals are connected to the hardware interface 13c by wire or wirelessly so that signals can be transmitted or received. For the hardware interface 13c, for example, a terminal block to which a signal line is connected, a general purpose input / output (GPIO), or a transceiver that transmits or receives radio waves for wireless communication is used.

[0059] FIG. 3 is a functional block diagram of the refrigeration cycle device according to the embodiment. Next, the functional block diagram of the refrigeration cycle device 1000 will be described with reference to FIG. 3.

[0060] The control device 13 includes a receiving part 50, a transmitting part 51, a storage part 52, and a control part 53. The receiving part 50 and the transmitting part 51 are implemented by the hardware interface 43. Further, the storage part 52 is implemented by storing a variety of information in the memory 42. Furthermore, the control part 53 is implemented by the processor 41 performing processing according to the program stored in the memory 42.

[0061] The receiving part 50 receives signals transmitted to the control device 13. The compressor shell temperature sensor 7, the discharge temperature sensor 8, the discharge pressure sensor 9, the heat source-side heat exchanger temperature sensor 10, the heat source heat medium temperature sensor 11, the heat source-side liquid pipe temperature sensor 12, the first utilization-side heat exchanger temperature sensor 22, the first load heat medium temperature sensor 23, the first utilization-side liquid pipe temperature sensor 24, the second utilization-side liquid pipe temperature sensor 32, the second load heat medium inflow-side temperature sensor 33, the second load heat medium outflow 06 09 24 side temperature sensor 34, and the remote controller 400 are connected to the receiving part 50. The receiving part 50 receives a signal including information detected by each of the sensors or a signal including information about user’s operation input from the operation part of the remote controller 400.

[0062] The transmitting part 51 transmits a control signal generated by the control part 53 or a signal including information on the operation of the refrigeration cycle device 1000 to components outside the control device 13 as will be described below. The transmitting part 51 is connected to the compressor 1, the heat source-side heat exchanger 2, the pressure reducing device 3, the switching valve group 4, and the remote controller 400. The compressor 1, the heat source-side heat exchanger 2, the pressure reducing device 3, and the switching valve group 4 are operated according to a control signal transmitted from the transmitting part 51. Further, the remote controller 400 receives the signal including the information on the operation of the refrigeration cycle device 1000 transmitted from the transmitting part 51, and displays the information included in the signal on the display part.

[0063] The storage part 52 stores information necessary for the control part 53 to generate the control signal.

[0064] The control part 53 generates the control signal or the signal including the information on the operation of refrigeration cycle device 1000 on the basis of information included in the signal received by receiving part 50 and information stored in storage part 52.

[0065] 06 09 24 FIG. 4 is a refrigerant circuit diagram during the first load heat medium cooling operation of the refrigeration cycle device according to the embodiment. In FIG. 4, the flow path through which the refrigerant circulates is indicated by a thick line. Next, the first load heat medium cooling operation of the refrigeration cycle device 1000 will be described. In the first load heat medium cooling operation, the control device 13 controls the pressure reducing device 3 and the switching valve group 4 so as to form the first load heat medium cooling refrigerant circulation circuit 601. The pressure reducing device 3 in the first load heat medium cooling refrigerant circulation circuit 601 is controlled so that the degree of opening of the first expansion valve 3a becomes a maximum, the degree of opening of the second expansion valve 3b becomes a predetermined degree of opening at which the refrigerant that has passed through the second expansion valve 3b is decompressed, and the degree of opening of the third expansion valve 3c becomes a minimum. Further, the switching valve group 4 in the first load heat medium cooling refrigerant circulation circuit 601 is controlled so that the first four-way valve 4a is in a state in which the A port 4aa and the B port 4ab communicate with each other and the C port 4ac and the D port 4ad communicate with each other, and the second four-way valve 4b is in a state in which the A port 4ba and the B port 4bb communicate with each other, and the C port 4bc and the D port 4bd communicate with each other.

[0066] When an operation of the compressor 1 starts in a state in which the first load heat medium cooling refrigerant circulation circuit 601 is formed, a high-temperature and high-pressure gaseous refrigerant is discharged from the compressor 1. The high-temperature and high-pressure gaseous refrigerant discharged from the compressor 1 passes through the first heat source device refrigerant pipe 111, the second four-way 06 09 24 valve 4b and the second heat source device refrigerant pipe 112 and flows into the heat source-side heat exchanger 2.

[0067] In the first load heat medium cooling refrigerant circulation circuit 601, the heat source-side heat exchanger 2 functions as a condenser. Therefore, the refrigerant passing through the heat source-side heat exchanger 2 is cooled by the heat source heat medium. That is, in the embodiment, the refrigerant passing through the heat sourceside heat exchanger 2 is cooled by the air in the outdoor space. The cooled refrigerant becomes a high-pressure liquid refrigerant and flows out of the heat source-side heat exchanger 2.

[0068] The refrigerant flowing out of the heat source-side heat exchanger 2 passes through the third heat source device refrigerant pipe 113. Further, although the first expansion valve 3a is provided in the middle of the third heat source device refrigerant pipe 113, since the degree of opening of the first expansion valve 3a is a maximum, the pressure of the refrigerant passing through the first expansion valve 3a does not decrease.

[0069] In the first load heat medium cooling refrigerant circulation circuit 601, the degree of opening of the second expansion valve 3b is a predetermined degree of opening at which the refrigerant that has passed through the second expansion valve 3b is decompressed, and the degree of opening of the third expansion valve 3 c is a minimum. Therefore, most of the refrigerant that has passed through the third heat source device refrigerant pipe 113 flows into the fourth heat source device refrigerant pipe 114, and a very small amount of refrigerant leaking from the third expansion valve 3 c flows into the fifth heat source device refrigerant pipe 115. The refrigerant that has flowed into the 06 09 24 fourth heat source device refrigerant pipe 114 passes through the second expansion valve 3b. The refrigerant that has passed through the second expansion valve 3b is decompressed, changes from a high-pressure liquid state to a low-pressure gas-liquid two-phase state, passes through the fourth heat source device refrigerant pipe 114, the first connecting pipe 501, and the first utilization-side liquid refrigerant pipe 210, and flows into the first utilization-side heat exchanger 21.

[0070] In the first load heat medium cooling refrigerant circulation circuit 601, the first utilization-side heat exchanger 21 functions as an evaporator. Therefore, the refrigerant passing through the first utilization-side heat exchanger 21 is heated by the first load heat medium. The heated refrigerant turns into a gaseous state and flows out of the first utilization-side heat exchanger 21. Also, the first load heat medium is cooled by the refrigerant passing through the first utilization-side heat exchanger 21. In other words, the air in the indoor space is cooled by the refrigeration cycle device 1000 in the embodiment.

[0071] The refrigerant flowing out of the first utilization-side heat exchanger 21 passes through the first utilization-side gas refrigerant pipe 220, the second connecting pipe 502, the sixth heat source device refrigerant pipe 116, the first four-way valve 4a, the eighth heat source device refrigerant pipe 118, the accumulator 5, and the ninth heat source device refrigerant pipe 119, and is suctioned from the suction port of the compressor 1. The refrigerant suctioned into the compressor 1 turns into a high-temperature and high-pressure gas state again, and is then discharged.

[0072] Further, even when the refrigerant flowing out of the first utilization-side heat 06 09 24 exchanger 21 is in a gas-liquid two-phase state, since the refrigerant passes through the accumulator 5 before it is suctioned into the compressor 1, the refrigerant suctioned into the compressor 1 is in a gaseous state. The accumulator 5 can curb malfunctioning of the compressor 1 due to the liquid refrigerant flowing into the compressor 1.

[0073] In this way, the first load heat medium can be cooled in the first load heat medium cooling operation by circulating the refrigerant in the first load heat medium cooling refrigerant circulation circuit 601. In the embodiment, since the first load heat medium is the air in the indoor space, the first load heat medium cooling operation is a cooling operation for cooling the air in the indoor space. In addition, in the first load heat medium cooling operation, the high-temperature and high-pressure refrigerant discharged from the compressor 1 flows into the heat source-side heat exchanger 2, and the parts constituting the heat source-side heat exchanger 2 can be heated. Therefore, the first load heat medium cooling operation is also a defrosting operation for melting frost adhering to the heat source-side heat exchanger 2.

[0074] Further, in a state in which the flow path switching device forms the first load heat medium cooling refrigerant circulation circuit 601, the fifth heat source device refrigerant pipe 115 communicates with the refrigerant flow path of the second utilization-side heat exchanger 31 via the third connecting pipe 503 and the second utilization-side liquid refrigerant pipe 310. Furthermore, in a state in which the flow path switching device forms the first load heat medium cooling refrigerant circulation circuit 601, the refrigerant flow path of the second utilization-side heat exchanger 31 communicates with the eighth heat source device refrigerant pipe 118 which is a flow path between the evaporator (corresponding to the first utilization-side heat exchanger 06 09 24 21) and the suction port of the compressor 1 in the first load heat medium cooling refrigerant circulation circuit 601 via the second utilization-side gas refrigerant pipe 320, the fourth connecting pipe 504, the seventh heat source device refrigerant pipe 117, the first four-way valve 4a, the tenth heat source device refrigerant pipe 120, the second fourway valve 4b, and the eleventh heat source device refrigerant pipe 121. As will be described below, in the second load heat medium heating refrigerant circulation circuit 603 and the cooling and heating simultaneous refrigerant circulation circuit 604 in which the refrigerant flows through the refrigerant flow path of the second utilization-side heat exchanger 31, due to factors such as pressure loss when the refrigerant flows through the pipe, the pressure in the flow path communicating from the fifth heat source device refrigerant pipe 115 to the eleventh heat source device refrigerant pipe 121 is higher than the pressure in the eighth heat source device refrigerant pipe 118. Therefore, in the state in which the flow path switching device forms the first load heat medium cooling refrigerant circulation circuit 601, although the flow path communicating from the fifth heat source device refrigerant pipe 115 to the eleventh heat source device refrigerant pipe 121 is not included in the first load heat medium cooling refrigerant circulation circuit 601, the refrigerant present in the flow path communicating from the fifth heat source device refrigerant pipe 115 to the eleventh heat source device refrigerant pipe 121 flows into the eighth heat source device refrigerant pipe 118 and joins the refrigerant circulating in the first load heat medium cooling refrigerant circulation circuit 601. Therefore, when the second load heat medium heating refrigerant circulation circuit 603 and the cooling and heating simultaneous refrigerant circulation circuit 604 are switched to the first load heat medium cooling refrigerant circulation circuit 601, the refrigerant present in the second utilization-side heat exchanger 31 and the refrigerant leaking from the third expansion valve 3c to the fifth heat source device refrigerant pipe 115 do not 06 09 24 accumulate in the flow path communicating from the fifth heat source device refrigerant pipe 115 to the eleventh heat source device refrigerant pipe 121, and join the refrigerant circulating in the first load heat medium cooling refrigerant circulation circuit 601.

[0075] FIG. 5 is a refrigerant circuit diagram during the first load heat medium heating operation of the refrigeration cycle device according to the embodiment. In FIG. 5, the flow path through which the refrigerant circulates is indicated by a thick line. Next, the first load heat medium heating operation of the refrigeration cycle device 1000 will be described. In the first load heat medium heating operation, the control device 13 controls the pressure reducing device 3 and the switching valve group 4 so as to form the first load heat medium heating refrigerant circulation circuit 602. The pressure reducing device 3 in the first load heat medium heating refrigerant circulation circuit 602 is controlled so that the degree of opening of the first expansion valve 3 a becomes a predetermined degree of opening at which the refrigerant that has passed through the first expansion valve 3a is decompressed, and the degree of opening of the second expansion valve 3b becomes a maximum, and the degree of opening of the third expansion valve 3 c becomes a minimum. Further, the switching valve group 4 in the first load heat medium heating refrigerant circulation circuit 602 is controlled so that the first four-way valve 4a is in a state in which the A port 4aa and the D port 4ad communicate with each other, and the B port 4ab and the C port 4ac communicate with each other, and the second four-way valve 4b is in a state in which the A port 4ba and the D port 4bd communicate with each other, and the B port 4bb and the C port 4bc communicate with each other.

[0076] When the operation of the compressor 1 starts in a state in which the first load heat medium heating refrigerant circulation circuit 602 is formed, a high-temperature and 06 09 24 high-pressure gaseous refrigerant is discharged from the compressor 1. The high-temperature and high-pressure gaseous refrigerant discharged from the compressor 1 passes through the first heat source device refrigerant pipe 111, the second four-way valve 4b, the tenth heat source device refrigerant pipe 120, the first four-way valve 4a, the sixth heat source device refrigerant pipe 116, the second connecting pipe 502, and the first utilization-side gas refrigerant pipe 220, and flows into the first utilization-side heat exchanger 21.

[0077] In the first load heat medium heating refrigerant circulation circuit 602, the first utilization-side heat exchanger 21 functions as a condenser. Therefore, the refrigerant passing through the first utilization-side heat exchanger 21 is cooled by the first load heat medium. The cooled refrigerant becomes a high-pressure liquid refrigerant and flows out of the first utilization-side heat exchanger 21. Also, the first load heat medium is heated by the refrigerant passing through the first utilization-side heat exchanger 21. In other words, the air in the indoor space is heated by the refrigeration cycle device 1000 in the embodiment.

[0078] The refrigerant flowing out of the first utilization-side heat exchanger 21 passes through the first utilization-side liquid refrigerant pipe 210, the first connecting pipe 501, and the fourth heat source device refrigerant pipe 114. In addition, although the second expansion valve 3b is provided in the middle of the fourth heat source device refrigerant pipe 114, since the degree of opening of the second expansion valve 3b is a maximum, the pressure of the refrigerant passing through the second expansion valve 3b does not decrease.

[0079] 06 09 24 In the first load heat medium heating refrigerant circulation circuit 602, the degree of opening of the first expansion valve 3a is a predetermined degree of opening at which the refrigerant that has passed through the first expansion valve 3a is decompressed, and the degree of opening of the third expansion valve 3 c is the a minimum. Therefore, most of the refrigerant that has passed through the fourth heat source device refrigerant pipe 114 flows into the third heat source device refrigerant pipe 113, and a very small amount of refrigerant leaking from the third expansion valve 3c flows into the fifth heat source device refrigerant pipe 115. The refrigerant that has flowed into the third heat source device refrigerant pipe 113 passes through the first expansion valve 3a. The refrigerant that has passed through the first expansion valve 3a is decompressed and changes from a high-pressure liquid state to a low-pressure gasliquid two-phase state, passes through the third heat source device refrigerant pipe 113, and flows into the heat source-side heat exchanger 2

[0080] In the first load heat medium heating refrigerant circulation circuit 602, the heat source-side heat exchanger 2 functions as an evaporator. Therefore, the refrigerant passing through the heat source-side heat exchanger 2 is heated by the heat source heat medium. That is, in the embodiment, the refrigerant passing through the heat sourceside heat exchanger 2 is heated by the air in the outdoor space. The heated refrigerant turns into a gaseous state and flows out of the heat source-side heat exchanger 2.

[0081] The refrigerant flowing out of the heat source-side heat exchanger 2 passes through the second heat source device refrigerant pipe 112, the second four-way valve 4b, the eleventh heat source device refrigerant pipe 121, the eighth heat source device refrigerant pipe 118, the accumulator 5, and the ninth heat source device refrigerant pipe 06 09 24 119 and is suctioned from the suction port of the compressor 1. The refrigerant suctioned into the compressor 1 turns into a high-temperature and high-pressure gas state again and is then discharged.

[0082] In this way, the first load heat medium can be heated in the first load heat medium heating operation by circulating the refrigerant in the first load heat medium heating refrigerant circulation circuit 602. In the embodiment, since the first load heat medium is the air in the indoor space, the first load heat medium heating operation is a heating operation for heating the air in the indoor space.

[0083] Further, in a state in which the flow path switching device forms the first load heat medium heating refrigerant circulation circuit 602, the fifth heat source device refrigerant pipe 115 communicates with the refrigerant flow path of the second utilization-side heat exchanger 31 via the third connecting pipe 503 and the second utilization-side liquid refrigerant pipe 310. Furthermore, in the state in which the flow path switching device forms the first load heat medium heating refrigerant circulation circuit 602, the refrigerant flow path of the second utilization-side heat exchanger 31 communicates with the eighth heat source device refrigerant pipe 118 which is a flow path between the evaporator (corresponding to the heat source-side heat exchanger 2) in the first load heat medium heating refrigerant circulation circuit 602 and the suction port of the compressor 1 via the second utilization-side gas refrigerant pipe 320, the fourth connecting pipe 504, the seventh heat source device refrigerant pipe 117, and the first four-way valve 4a. As will be described below, in the second load heat medium heating refrigerant circulation circuit 603 and the cooling and heating simultaneous refrigerant circulation circuit 604 in which the refrigerant flows through the refrigerant flow path of 06 09 24 the second utilization-side heat exchanger 31, due to factors such as pressure loss when the refrigerant flows through the pipe, the pressure in the flow path communicating from the fifth heat source device refrigerant pipe 115 to the first four-way valve 4a is higher than the pressure in the eighth heat source device refrigerant pipe 118. Therefore, in the state in which the flow path switching device forms the first load heat medium heating refrigerant circulation circuit 602, although the flow path communicating from the fifth heat source device refrigerant pipe 115 to the first four-way valve 4a is not included in the first load heat medium heating refrigerant circulation circuit 602, the refrigerant present in the flow path communicating from the fifth heat source device refrigerant pipe 115 to the first four-way valve 4a flows into the eighth heat source device refrigerant pipe 118 and joins the refrigerant circulating in the first load heat medium heating refrigerant circulation circuit 602. Therefore, when the second load heat medium heating refrigerant circulation circuit 603 and the cooling and heating simultaneous refrigerant circulation circuit 604 are switched to the first load heat medium heating refrigerant circulation circuit 602, the refrigerant present in the second utilization-side heat exchanger 31 and the refrigerant leaking from the third expansion valve 3c to the fifth heat source device refrigerant pipe 115 do not accumulate in the flow path communicating from the fifth heat source device refrigerant pipe 115 to the first four-way valve 4a and join the refrigerant circulating in the first load heat medium heating refrigerant circulation circuit 602.

[0084] FIG. 6 is a refrigerant circuit diagram during the second load heat medium heating operation of the refrigeration cycle device according to the embodiment. In FIG. 6, the flow path through which the refrigerant circulates is indicated by a thick line. Next, the second load heat medium heating operation of the refrigeration cycle device 06 09 24 1000 will be described. In the second load heat medium heating operation, the control device 13 controls the pressure reducing device 3 and the switching valve group 4 so as to form the second load heat medium heating refrigerant circulation circuit 603. The pressure reducing device 3 in the second load heat medium heating refrigerant circulation circuit 603 is controlled so that the degree of opening of the first expansion valve 3 a becomes a predetermined degree of opening at which the refrigerant that has passed through the first expansion valve 3a is decompressed, and the degree of opening of the second expansion valve 3b becomes a minimum, and the degree of opening of the third expansion valve 3c becomes a maximum. Further, the switching valve group 4 in the second load heat medium heating refrigerant circulation circuit 603 is controlled so that the first four-way valve 4a is in a state in which the A port 4aa and the B port 4ab communicate with each other and the C port 4ac and the D port 4ad communicate with each other, and the second four-way valve 4b is in a state in which the A port 4ba and the D port 4bd communicate with each other, and the B port 4bb and the C port 4bc communicate with each other. Also, in the second load heating medium heating operation, the second load heat medium flows from the second load heat medium inflowside pipe 330 to the second load heat medium outflow-side pipe 340 through the load heat medium flow path of the second utilization-side heat exchanger 31.

[0085] When the operation of the compressor 1 starts in a state in which the second load heat medium heating refrigerant circulation circuit 603 is formed, a high-temperature and high-pressure gaseous refrigerant is discharged from the compressor 1. The high-temperature and high-pressure gaseous refrigerant discharged from the compressor 1 passes through the first heat source device refrigerant pipe 111, the second four-way valve 4b, the tenth heat source device refrigerant pipe 120, the first four-way valve 4a, 06 09 24 the seventh heat source device refrigerant pipe 117, the fourth connecting pipe 504, and the second utilization-side gas refrigerant pipe 320, and flows into the refrigerant flow path of the second utilization-side heat exchanger 31.

[0086] In the second load heat medium heating refrigerant circulation circuit 603, the second utilization-side heat exchanger 31 functions as a condenser. Therefore, the refrigerant passing through the refrigerant flow path of the second utilization-side heat exchanger 31 is cooled by the second load heat medium passing through the load heat medium flow path of the second utilization-side heat exchanger 31. The cooled refrigerant becomes a high-pressure liquid refrigerant and flows out of the refrigerant flow path of the second utilization-side heat exchanger 31. Also, the second load heat medium is heated by the refrigerant passing through the second utilization-side heat exchanger 31. That is, in the embodiment, the water that has flowed into the load heat medium flow path of the second utilization-side heat exchanger 31 is heated by the refrigeration cycle device 1000.

[0087] The refrigerant flowing out of the second utilization-side heat exchanger 31 passes through the second utilization-side liquid refrigerant pipe 310, the third connecting pipe 503, and the fifth heat source device refrigerant pipe 115. Further, although the third expansion valve 3c is provided in the middle of the fifth heat source device refrigerant pipe 115, since the degree of opening of the third expansion valve 3c is a maximum, the pressure of the refrigerant passing through the third expansion valve 3 c does not decrease.

[0088] In the second load heat medium heating refrigerant circulation circuit 603, the 06 09 24 degree of opening of the first expansion valve 3a is a predetermined degree of opening at which the refrigerant that has passed through the first expansion valve 3a is decompressed, and the degree of opening of the second expansion valve 3b is a minimum. Therefore, most of the refrigerant that has passed through the fifth heat source device refrigerant pipe 115 flows into the third heat source device refrigerant pipe 113, and a very small amount of refrigerant leaking from the second expansion valve 3b flows into the fourth heat source device refrigerant pipe 114. The refrigerant that has flowed into the third heat source device refrigerant pipe 113 passes through the first expansion valve 3a. The refrigerant that has passed through the first expansion valve 3a is decompressed and changes from a high-pressure liquid state to a low-pressure gasliquid two-phase state, and flows into the heat source-side heat exchanger 2 through the third heat source device refrigerant pipe 113.

[0089] In the first load heat medium heating refrigerant circulation circuit 602, the heat source-side heat exchanger 2 functions as an evaporator. Therefore, the refrigerant passing through the heat source-side heat exchanger 2 is heated by the heat source heat medium. That is, in the embodiment, the refrigerant passing through the heat sourceside heat exchanger 2 is heated by the air in the outdoor space. The heated refrigerant turns into a gaseous state and flows out of the heat source-side heat exchanger 2.

[0090] The refrigerant flowing out of the heat source-side heat exchanger 2 passes through the second heat source device refrigerant pipe 112, the second four-way valve 4b, the eleventh heat source device refrigerant pipe 121, the eighth heat source device refrigerant pipe 118, the accumulator 5, and the ninth heat source device refrigerant pipe 119, and is suctioned from the suction port of the compressor 1. The refrigerant 06 09 24 suctioned into the compressor 1 turns into a high-temperature and high-pressure gas state again and is then discharged.

[0091] The second load heat medium can be heated in the second load heat medium heating operation by circulating the refrigerant in the second load heat medium heating refrigerant circulation circuit 603 as described above. In the embodiment, since the second load heat medium is water, the second load heat medium heating operation is a hot water supply operation in which water is heated to produce hot water.

[0092] Further, in a state in which the flow path switching device forms the second load heat medium heating refrigerant circulation circuit 603, the fourth heat source device refrigerant pipe 114 communicates with the first utilization-side heat exchanger 21 via the first connecting pipe 501 and the first utilization-side liquid refrigerant pipe 210. Furthermore, in the state in which the flow path switching device forms the second load heat medium heating refrigerant circulation circuit 603, the refrigerant flow path of the first utilization-side heat exchanger 21 communicates with the eighth heat source device refrigerant pipe 118 which is a flow path between the evaporator (corresponding to the heat source-side heat exchanger 2) in the second load heat medium heating refrigerant circulation circuit 603 and the suction port of the compressor 1 via the first utilizationside gas refrigerant pipe 220, the second connecting pipe 502, the sixth heat source device refrigerant pipe 116, and the first four-way valve 4a. In the first load heat medium cooling refrigerant circulation circuit 601, the first load heat medium heating refrigerant circulation circuit 602, and the cooling and heating simultaneous refrigerant circulation circuit 604 described below, in which the refrigerant flows through the first utilization-side heat exchanger 21, due to factors such as pressure loss when the 06 09 24 refrigerant flows through the pipe, the pressure in the flow path communicating from the fourth heat source device refrigerant pipe 114 to the first four-way valve 4a is higher than the pressure in the eighth heat source device refrigerant pipe 118. Therefore, in the state in which the flow path switching device forms the second load heat medium heating refrigerant circulation circuit 603, although the flow path communicating from the fourth heat source device refrigerant pipe 114 to the first four-way valve 4a is not included in the second load heat medium heating refrigerant circulation circuit 603, the refrigerant present in the flow path communicating from the fourth heat source device refrigerant pipe 114 to the first four-way valve 4a flows into the eighth heat source device refrigerant pipe 118 and joins the refrigerant circulating in the second load heat medium heating refrigerant circulation circuit 603. Therefore, when the first load heat medium cooling refrigerant circulation circuit 601, the first load heat medium heating refrigerant circulation circuit 602, and the cooling and heating simultaneous refrigerant circulation circuit 604 are switched to the second load heat medium heating refrigerant circulation circuit 603, the refrigerant present in the first utilization-side heat exchanger 21 and the refrigerant leaking from the second expansion valve 3b to the fourth heat source device refrigerant pipe 114 join the refrigerant that does not accumulate in the flow path communicating from the fourth heat source device refrigerant pipe 114 to the first fourway valve 4a and circulates in the second load heat medium heating refrigerant circulation circuit 603.

[0093] FIG. 7 is a refrigerant circuit diagram during the cooling and heating simultaneous operation of the refrigeration cycle device according to the embodiment. In FIG. 7, the flow path through which the coolant circulates is indicated by a thick line. Next, the cooling and heating simultaneous operation of the refrigeration cycle device 06 09 24 1000 will be described. In the cooling and heating simultaneous operation, the control device 13 controls the pressure reducing device 3 and the switching valve group 4 so as to form the cooling and heating simultaneous refrigerant circulation circuit 604. The pressure reducing device 3 in the cooling and heating simultaneous refrigerant circulation circuit 604 is controlled so that the degree of opening of the first expansion valve 3 a becomes a minimum, the degree of opening of the second expansion valve 3b becomes a predetermined degree of opening at which the refrigerant that has passed through the second expansion valve 3b is decompressed, and the degree of opening of the third expansion valve 3c becomes a maximum. In addition, the switching valve group 4 in the cooling and heating simultaneous refrigerant circulation circuit 604 is controlled so that the first four-way valve 4a is in a state in which the A port 4aa and the B port 4ab communicate with each other and the C port 4ac and the D port 4ad communicate with each other, and the second four-way valve 4b is in a state in which the A port 4ba and the D port 4bd communicate with each other, and the B port 4bb and the C port 4bc communicate with each other. Also, in the cooling and heating simultaneous operation, the second load heat medium flows from the second load heat medium inflow-side pipe 330 to the second load heat medium outflow-side pipe 340 through the load heat medium flow path of the second utilization-side heat exchanger 31.

[0094] When the operation of the compressor 1 starts in a state in which the cooling and heating simultaneous refrigerant circulation circuit 604 is formed, a high-temperature and high-pressure gaseous refrigerant is discharged from the compressor 1. The high-temperature and high-pressure gaseous refrigerant discharged from the compressor 1 passes through the first heat source device refrigerant pipe 111, the second four-way valve 4b, the tenth heat source device refrigerant pipe 120, the first four-way valve 4a, 06 09 24 the seventh heat source device refrigerant pipe 117, the fourth connecting pipe 504, and the second utilization-side gas refrigerant pipe 320, and flows into the refrigerant flow path of the second utilization-side heat exchanger 31.

[0095] In the cooling and heating simultaneous refrigerant circulation circuit 604, the second utilization-side heat exchanger 31 functions as a condenser. Therefore, the refrigerant passing through the refrigerant flow path of the second utilization-side heat exchanger 31 is cooled by the second load heat medium passing through the load heat medium flow path of the second utilization-side heat exchanger 31. The cooled refrigerant turns into a high-pressure liquid refrigerant and flows out of the refrigerant flow path of the second utilization-side heat exchanger 31. Also, the second load heat medium is heated by the refrigerant passing through the second utilization-side heat exchanger 31. That is, in the embodiment, the water that has flowed into the load heat medium flow path of the second utilization-side heat exchanger 31 is heated by the refrigeration cycle device 1000.

[0096] The refrigerant flowing out of the second utilization-side heat exchanger 31 passes through the second utilization-side liquid refrigerant pipe 310, the third connecting pipe 503, and the fifth heat source device refrigerant pipe 115. Further, although the third expansion valve 3c is provided in the middle of the fifth heat source device refrigerant pipe 115, since the degree of opening of the third expansion valve 3c is a maximum, the pressure of the refrigerant passing through the third expansion valve 3 c does not decrease.

[0097] In the cooling and heating simultaneous refrigerant circulation circuit 604, the 06 09 24 opening degree of the first expansion valve 3a is a minimum, and the opening degree of the second expansion valve 3b is a predetermined opening degree at which the refrigerant that has passed through the second expansion valve 3b is decompressed. Therefore, most of the refrigerant that has passed through the fifth heat source device refrigerant pipe 115 flows into the fourth heat source device refrigerant pipe 114, and a very small amount of refrigerant leaking from the first expansion valve 3 a flows into the third heat source device refrigerant pipe 113. The refrigerant that has flowed into the fourth heat source device refrigerant pipe 114 passes through the second expansion valve 3b. The refrigerant that has passed through the second expansion valve 3b is decompressed and changes from a high-pressure liquid state to a low-pressure gas-liquid two-phase state, passes through the fourth heat source device refrigerant pipe 114, the first connecting pipe 501, and the first utilization-side liquid refrigerant pipe 210, and flows into the first utilization-side heat exchanger 21.

[0098] In the cooling and heating simultaneous refrigerant circulation circuit 604, the first utilization-side heat exchanger 21 functions as an evaporator. Therefore, the refrigerant passing through the first utilization-side heat exchanger 21 is heated by the first load heat medium. The heated refrigerant turns into a gaseous state and flows out of the first utilization-side heat exchanger 21. Also, the first load heat medium is cooled by the refrigerant passing through the first utilization-side heat exchanger 21. In other words, the air in the indoor space is cooled by the refrigeration cycle device 1000 in the embodiment.

[0099] The refrigerant flowing out of the first utilization-side heat exchanger 21 passes through the first utilization-side gas refrigerant pipe 220, the second connecting pipe 502, 06 09 24 the sixth heat source device refrigerant pipe 116, the first four-way valve 4a, the eighth heat source device refrigerant pipe 118, the accumulator 5, and the ninth heat source machine refrigerant pipe 119 and is suctioned from the suction port of the compressor 1. The refrigerant suctioned into the compressor 1 turns into a high-temperature and high-pressure gas state again and is then discharged.

[0100] The cooling of the first load heat medium and the heating of the second load heat medium can be performed simultaneously in the cooling and heating simultaneous refrigerant operation by circulating the refrigerant in the cooling and heating simultaneous refrigerant circulation circuit 604 as described above. In the embodiment, since the first load heat medium is the air in the indoor space and the second load heat medium is water, the cooling and heating simultaneous operation is a cooling and hot water supply simultaneous operation in which the air in the indoor space is cooled and water is heated to generate hot water at the same time.

[0101] Further, in a state in which the flow path switching device forms the cooling and heating simultaneous refrigerant circulation circuit 604, the third heat source device refrigerant pipe 113 communicates with the heat source-side heat exchanger 2. Furthermore, in the state in which the flow path switching device forms the cooling and heating simultaneous refrigerant circulation circuit 604, the heat source-side heat exchanger 2 communicates with the eighth heat source device refrigerant pipe 118 which is a flow path between the evaporator (corresponding to the first utilization-side heat exchanger 21) and the suction port of the compressor 1 in the cooling and heating simultaneous refrigerant circulation circuit 604 via the second heat source device refrigerant pipe 112, the second four-way valve 4b, and the eleventh heat source device 06 09 24 refrigerant pipe 121. In the first load heat medium cooling refrigerant circulation circuit 601, the first load heat medium heating refrigerant circulation circuit 602, and the second load heat medium heating refrigerant circulation circuit 603 in which the refrigerant flows through the heat source-side heat exchanger 2, due to factors such as pressure loss when the refrigerant flows through the pipe, the pressure in the flow path communicating from the third heat source device refrigerant pipe 113 to the eleventh heat source device refrigerant pipe 121 is higher than the pressure in the eighth heat source device refrigerant pipe 118. Therefore, in the state in which the flow path switching device forms the cooling and heating simultaneous refrigerant circulation circuit 604, although the flow path communicating from the third heat source device refrigerant pipe 113 to the eleventh heat source device refrigerant pipe 121 is not included in the cooling and heating simultaneous refrigerant circulation circuit 604, the refrigerant present in the flow path communicating from the third heat source device refrigerant pipe 113 to the eleventh heat source device refrigerant pipe 121 flows into the eighth heat source device refrigerant pipe 118 and joins the refrigerant circulating in the cooling and heating simultaneous refrigerant circulation circuit 604. Therefore, when the first load heat medium cooling refrigerant circulation circuit 601, the first load heat medium heating refrigerant circulation circuit 602, and the second load heat medium heating refrigerant circulation circuit 603 are switched to the cooling and heating simultaneous refrigerant circulation circuit 604, the refrigerant present in the heat source-side heat exchanger 2 and the refrigerant leaking from the first expansion valve 3a to the third heat source device refrigerant pipe 113 do not accumulate in the flow path communicating from the third heat source device refrigerant pipe 113 to the eleventh heat source device refrigerant pipe 121, but join the refrigerant circulating in the cooling and heating simultaneous refrigerant circulation circuit 604. 06 09 24 As described above, the refrigeration cycle device 1000 according to the embodiment includes a compressor 1 which suctions a refrigerant from a suction port, compresses the suctioned refrigerant, and discharges the compressed refrigerant from a discharge port, a first heat exchanger (corresponding to the heat source-side heat exchanger 2) which performs heat exchange between the refrigerant and a first heat medium (corresponding to the heat source heat medium), a second heat exchanger (corresponding to the first utilization-side heat exchanger 21) which performs heat exchange between the refrigerant and a second heat medium (corresponding to the first load heat medium), a third heat exchanger (corresponding to the second utilization-side heat exchanger 31) that performs heat exchange between the refrigerant and a third heat medium (corresponding to the second load heat medium), and a flow path switching device (corresponding to the pressure reducing device 3 and the switching valve group 4) which switches a refrigerant circulation circuit in which the refrigerant circulates, wherein the flow path switching device switches between a first refrigerant circulation circuit (corresponding to the second load heat medium heating refrigerant circulation circuit 603 or the cooling and heating simultaneous refrigerant circulation circuit 604) which is a refrigerant circulation circuit in which the third heat exchanger is included and the third heat exchanger functions as an evaporator or a condenser, and a second refrigerant circulation circuit (corresponding to the first load heat medium cooling refrigerant circulation circuit 601 or the first load heat medium heating refrigerant circulation circuit 602) which is a refrigerant circulation circuit in which the first heat exchanger and the second heat exchanger are included, any one of the first heat exchanger and the second heat exchanger functions as an evaporator, and the third heat exchanger is not included, and when the second refrigerant circulation circuit is formed 06 09 24 by the flow path switching device, the third heat exchanger communicates with a flow path between the first heat exchanger or the second heat exchanger (corresponding to the first utilization-side heat exchanger 21 when the second refrigerant circulation circuit is the first load heat medium cooling refrigerant circulation circuit 601, and corresponding to the heat source-side heat exchanger 2 when the second refrigerant circulation circuit is the first load heat medium heating refrigerant circulation circuit 602) which functions as an evaporator of the second refrigerant circuit and the suction port of the compressor 1. In such configuration, particularly, when the second refrigerant circulation circuit is formed, since the third heat exchanger has a structure which communicates with the flow path between the heat exchanger that functions as the evaporator of the second refrigerant circulation circuit and the suction port of the compressor 1, the refrigeration cycle device 1000 according to the embodiment has an effect in which the refrigerant accumulated in heat exchanger not included in the refrigerant circulation circuit flows into the flow path between the evaporator and the suction port of the compressor and joins the refrigerant circulating in the refrigerant circulation circuit, thereby curbing a shortage of refrigerant.

[0103] Moreover, in the configuration of the refrigeration cycle device 1000 according to the above-described embodiment, the example in which the first heat exchanger corresponds to the heat source-side heat exchanger 2, the second heat exchanger corresponds to the first utilization-side heat exchanger 21, and the third heat exchanger corresponds to the second utilization-side heat exchanger 31 has been described, but the present disclosure is not limited thereto, and a case in which the first to third heat exchangers correspond to the heat exchangers of the refrigeration cycle device 1000, as in the following first and second cases, is also included in one aspect of the present disclosure. In the first case, the first heat exchanger corresponds to the first utilization- 06 09 24 side heat exchanger 21, the second heat exchanger corresponds to the second utilizationside heat exchanger 31, and the third heat exchanger corresponds to the heat source-side heat exchanger 2. In the first case, the first refrigerant circulation circuit corresponds to the first load heat medium cooling refrigerant circulation circuit 601, the first load heat medium heating refrigerant circulation circuit 602, or the second load heat medium heating refrigerant circulation circuit 603, and the second refrigerant circulation circuit corresponds to the cooling and heating simultaneous refrigerant circulation circuit 604. In the second case, the first heat exchanger corresponds to the heat source-side heat exchanger 2, the second heat exchanger corresponds to the second utilization-side heat exchanger 31, and the third heat exchanger corresponds to the first utilization-side heat exchanger 21. In the second case, the first refrigerant circulation circuit corresponds to the first load heat medium cooling refrigerant circulation circuit 601, the first load heat medium heating refrigerant circulation circuit 602, or the cooling and heating simultaneous refrigerant circulation circuit 604, and the second refrigerant circulation circuit corresponds to the second load heat medium heating refrigerant circulation circuit 603. Further, in both the first and second cases, the refrigeration cycle device 1000 according to the embodiment has an effect in which the refrigerant accumulated in the heat exchanger that is not included in the refrigerant circulation circuit flows into the flow path between the evaporator and the suction port of the compressor, and joins the refrigerant circulating in the refrigerant circulation circuit, thereby curbing the shortage of refrigerant.

[0104] Further, the refrigeration cycle device 1000 according to the embodiment has a configuration, as an additional configuration, in which, in the flow path switching device, when the second utilization-side heat exchanger 31 functions as a condenser, and the first 06 09 24 utilization-side heat exchanger 21 functions as an evaporator, and it is possible to switch to the cooling and heating simultaneous refrigerant circulation circuit 604 in which the refrigerant that has passed through the first utilization-side heat exchanger 21 is suctioned from the suction port of the compressor 1, and the cooling and heating simultaneous refrigerant circulation circuit 604 is formed by the flow path switching device, the heat source-side heat exchanger 2 is not included in the cooling and heating simultaneous refrigerant circulation circuit 604 and communicates with the flow path between the first utilization-side heat exchanger 21 of the cooling and heating simultaneous refrigerant circulation circuit 604 and the suction port of the compressor 1. In the additional configuration, in the case in which the flow path switching device forms the cooling and heating simultaneous refrigerant circulation circuit 604, since the heat source-side heat exchanger 2 is configured to communicate with the flow path between the first utilization-side heat exchanger 21 and the suction port of the compressor 1, the refrigeration cycle device 1000 according to the embodiment has an effect in which the refrigerant accumulated in the heat source-side heat exchanger 2 not included in the cooling and heating simultaneous refrigerant circulation circuit 604 flows into the flow path between the first utilization-side heat exchanger 21 and the suction port of the compressor 1 and joins the refrigerant circulating in the cooling and heating simultaneous refrigerant circulation circuit 604, thereby curbing the shortage of refrigerant.

[0105] Further, the refrigeration cycle device 1000 according to the embodiment has a configuration, as an additional configuration, in which, in the flow path switching device, when the heat source-side heat exchanger 2 functions as a condenser, and the first utilization-side heat exchanger 21 functions as an evaporator, and it is possible to switch to the first load heat medium cooling refrigerant circulation circuit 601 in which the 06 09 24 refrigerant that has passed through the first utilization-side heat exchanger 21 is suctioned from the suction port of the compressor 1, and the first load heat medium cooling refrigerant circulation circuit 601 is formed by the flow path switching device, the second utilization-side heat exchanger 31 is not included in the first load heat medium cooling refrigerant circulation circuit 601 and communicates with the flow path between the first utilization-side heat exchanger 21 of the first load heat medium cooling refrigerant circulation circuit 601 and the suction port of the compressor 1. In the additional configuration, when the flow path switching device forms the first load heat medium cooling refrigerant circulation circuit 601, since the second utilization-side heat exchanger 31 communicates with the flow path between the first utilization-side heat exchanger 21 and the suction port of the compressor 1, the refrigeration cycle device 1000 according to the embodiment has an effect in which the refrigerant accumulated in the second utilization-side heat exchanger 31 not included in the first load heat medium cooling refrigerant circulation circuit 601 flows into the flow path between the first utilization-side heat exchanger 21 and the suction port of the compressor 1 and joins the refrigerant circulating in the first load heat medium cooling refrigerant circulation circuit 601, thereby curbing the shortage of refrigerant.

[0106] Further, the refrigeration cycle device 1000 according to the embodiment has a configuration, as an additional configuration, in which the flow path switching device includes two four-way valves 4a and 4b and three expansion valves 3a, 3b, and 3c, and when the first load heat medium heating refrigerant circulation circuit 602 is formed by the flow path switching device, the refrigerant circulates in the order of the discharge port of the compressor 1, the first utilization-side heat exchanger 21, at least one (corresponding to the expansion valve 3 a, 3b) of the three expansion valves, the heat 06 09 24 source-side heat exchanger 2 and the suction port of the compressor 1, any one (corresponding to the expansion valve 3c) of the three expansion valves closes the flow path between the discharge port of the compressor 1 and the second utilization-side heat exchanger 31, and the second utilization-side heat exchanger 31 communicates with the flow path between the heat source-side heat exchanger 2 and the suction port of the compressor 1, when the second load heat medium heating refrigerant circulation circuit 603 is formed by the flow path switching device, the refrigerant circulates in the order of the discharge port of the compressor 1, the second utilization-side heat exchanger 31, at least one (corresponding to the expansion valve 3a, 3c) of the three expansion valves, the heat source-side heat exchanger 2 and the suction port of the compressor 1, any one (corresponding to the expansion valve 3b) of the three expansion valves closes the flow path between the discharge port of the compressor 1 and the first utilization-side heat exchanger 21, and the first utilization-side heat exchanger 21 communicates with the flow path between the heat source-side heat exchanger 2 and the suction port of the compressor 1, and when the cooling and heating simultaneous refrigerant circulation circuit 604 is formed by the flow path switching device, the refrigerant circulates in the order of the discharge port of the compressor 1, the second utilization-side heat exchanger 31, at least one (corresponding to the expansion valve 3b, 3c) of the three expansion valves, the first utilization-side heat exchanger 21 and the suction port of the compressor 1, one (corresponding to the expansion valve 3 a) of the three expansion valves closes the flow path between the discharge port of the compressor 1 and the heat source-side heat exchanger 2, and the heat source-side heat exchanger 2 communicates with the flow path between the first utilization-side heat exchanger 21 and the suction port of the compressor 1, and when the first load heat medium cooling refrigerant circulation circuit 601 is formed by the flow path switching device, the refrigerant 06 09 24 circulates in the order of the discharge port of the compressor 1, the heat source-side heat exchanger 2, at least one (corresponding to the expansion valve 3 a, 3b) of the three expansion valves, the first utilization-side heat exchanger 21, and the suction port of the compressor 1, any one (corresponding to the expansion valve 3 c) of the three expansion valves closes the flow path between the discharge port of the compressor 1 and the second utilization-side heat exchanger 31, and the second utilization-side heat exchanger 31 communicates with the flow path between the first utilization-side heat exchanger 21 and the suction port of the compressor 1. With such an additional configuration, the refrigeration cycle device 1000 according to the embodiment has an effect in which, when the first load heat medium cooling refrigerant circulation circuit 601, the first load heat medium heating refrigerant circulation circuit 602, the second load heat medium heating refrigerant circulation circuit 603, and the cooling and heating simultaneous refrigerant circulation circuit 604 are formed, it is possible to obtain a configuration in which the refrigerant accumulated in the heat exchanger not included in each of the refrigerant circulation circuit joins the refrigerant circulating in the refrigerant circulation circuit, and thus the shortage of refrigerant can be curbed.

[0107] Further, the refrigeration cycle device 1000 according to the embodiment has a configuration, as an additional configuration, in which the flow path switching device includes a four-way valve (corresponding to the second four-way valve 4b), and when the four-way valve forms the second load heat medium heating refrigerant circulation circuit 603, the discharge port of the compressor 1 and the second utilization-side heat exchanger 31 communicate with each other, and the heat source-side heat exchanger 2 and the suction port of the compressor 1 are connected to each other, and when the first load heat medium cooling refrigerant circulation circuit 601 is formed, the discharge port 06 09 24 of the compressor 1 and the heat source-side heat exchanger 2 are connected to each other, and the second utilization-side heat exchanger 31 is connected to the flow path between the first utilization-side heat exchanger 21 of the first load heat medium cooling refrigerant circulation circuit 601 and the suction port of the compressor. In the refrigeration cycle device of Patent Document 1, frost may adhere to the outdoor heat exchanger during the hot water supply operation. At this time, in order to melt the frost adhering to the outdoor heat exchanger, it is conceivable to switch to a refrigerant circulation circuit for a cooling operation in which the outdoor heat exchanger functions as a condenser and to perform a defrosting operation to melt the frost. In the refrigerant circulation circuit of Patent Document 1, when the temperature of the hot water supply heat exchanger and the temperature of the outdoor heat exchanger are compared immediately after the hot water supply operation is switched to the refrigerant circulation circuit for a cooling operation, the temperature of the hot water supply heat exchanger is higher. Also, the temperature and the pressure are in a proportional relationship. Therefore, the pressure inside the hot water heat exchanger is higher than the pressure inside the outdoor heat exchanger immediately after the hot water supply operation is switched to the refrigerant circulation circuit for a cooling operation. Also, a normal electromagnetic valve has a needle and a pedestal, and the needle is moved closer to the pedestal to close the flow path, and the needle is moved away from the pedestal to open the flow path. In the normal electromagnetic valve, a high-pressure side opening and a low-pressure side opening are set so that a pressure is applied in a direction in which the needle presses the pedestal, and the second electromagnetic valve of Patent Document 1 is connected so that the opening communicating with the discharge port of the compressor is the high-pressure side opening, and the opening communicating with the hot water supply heat exchanger is the low-pressure side opening. However, since the 06 09 24 pressure inside the hot water supply heat exchanger is higher than the pressure inside the outdoor heat exchanger immediately after the hot water supply operation is switched to the refrigerant circulation circuit for a cooling operation, the pressure at the low-pressure side opening of the second electromagnetic valve becomes higher than the pressure at the high-pressure side opening, and a reverse pressure is generated in the second electromagnetic valve. When the reverse pressure is generated in the electromagnetic valve, a pressure is applied in a direction in which the needle is moved away from the pedestal inside the electromagnetic valve, the needle rises and falls to collide with the pedestal, and thus chattering noise is generated. Thus, in Patent Document 1, the chattering noise is generated immediately after the hot water supply operation is switched to the refrigerant circulation circuit for a cooling operation. However, in the refrigeration cycle device 1000 according to the embodiment, even immediately after the second load heat medium heating refrigerant circulation circuit 603 is switched to the first load heat medium cooling refrigerant circulation circuit 601, there is no valve in which the reverse pressure is generated and no chattering noise is generated by providing the additional configuration.

[0108] Further, in the refrigeration cycle device 1000 according to the embodiment, four types of refrigerant circulation circuits including the first load heat medium cooling refrigerant circulation circuit 601, the first load heat medium heating refrigerant circulation circuit 602, the second load heat medium heating refrigerant circulation circuit 603, and the cooling and heating simultaneous refrigerant circulation circuit 604 can be switched, but the present disclosure is not limited thereto, and the refrigeration cycle device may be capable of switching between a refrigerant circulation circuit which corresponds to the first refrigerant circulation circuit including a heat exchanger 06 09 24 corresponding to the third heat exchanger and a refrigerant circulation circuit which corresponds to the second refrigerant circulation circuit that does not include a heat exchanger corresponding to the third heat exchanger. For example, in the memory 13b of the control device 13, a program for switching to a state in which the first load heat medium heating refrigerant circulation circuit 602 is formed or a state in which the second load heat medium heating refrigerant circulation circuit 603 is formed and data necessary for processing the program is stored, and a program for switching to a state in which the first load heat medium cooling refrigerant circulation circuit 601 and the cooling and heating simultaneous refrigerant circulation circuit 604 are formed and data necessary for processing the program may not be stored.

[0109] Further, in the refrigeration cycle device 1000 according to the embodiment, since the second utilization device 300 is a water heater, the flow path switching device did not switch to the refrigerant circulation circuit for cooling the second heat medium, but the present disclosure is not limited thereto, and the refrigeration cycle device may be switched to the refrigerant circulation circuit for cooling the second heat medium. For example, the refrigeration cycle device may form a refrigerant circulation circuit in which the second utilization device is a cooler of a constant temperature water tank that stores low temperature water therein, the heat source-side heat exchanger 2 functions as a condenser, and the second utilization-side heat exchanger 31 functions as an evaporator, or a refrigerant circulation circuit in which the first utilization-side heat exchanger 21 functions as a condenser and the second utilization-side heat exchanger 31 functions as an evaporator. The former refrigerant circulation circuit is controlled so that the degree of opening of the first expansion valve 3 a becomes a maximum, the degree of opening of the second expansion valve 3b becomes a minimum, the degree of opening of the third 06 09 24 expansion valve 3c becomes a predetermined degree of opening at which the refrigerant that has passed through the third expansion valve 3c is decompressed, the first four-way valve 4a is in a state in which the A port 4aa and the B port 4ab communicate with each other and the C port 4ac and the D port 4ad communicate with each other, and the second four-way valve 4b is in a state in which the A port 4ba and the B port 4bb communicate with each other and the C port 4bc and the D port 4bd communicate with each other. Further, the latter refrigerant circulation circuit is controlled so that the degree of opening of the first expansion valve 3 a becomes a minimum, the degree of opening of the second expansion valve 3b becomes a maximum, the degree of opening of the third expansion valve 3c becomes a predetermined degree of opening at which the refrigerant that has passed through the third expansion valve 3c is decompressed, the first four-way valve 4a is in a state in which the A port 4aa and the D port 4ad communicate with each other, and the B port 4ab and the C port 4ac communicate with each other, and the second four-way valve 4b is in a state in which the A port 4ba and the D port 4bd communicate with each other and the B port 4bb and the C port 4bc communicate with each other. Furthermore, in both the former refrigerant circulation circuit and the latter refrigerant circulation circuit, since the heat exchanger (corresponding to the first utilization-side heat exchanger 21 in the case of the former refrigerant circulation circuit, and corresponding to the heat source-side heat exchanger 2 in the case of the latter refrigerant circulation circuit) not included in the refrigerant circulation circuit is connected to the flow path between the heat exchanger (corresponding to the second utilization-side heat exchanger 31 in the case of both of them) functioning as the evaporator of the refrigerant circulation circuit and the suction port of the compressor 1, the refrigeration cycle device in which the former refrigerant circulation circuit and the latter refrigerant circulation circuit are formed also has the effect in which the configuration capable of curbing the shortage of 06 09 24 refrigerant can be obtained.

[0110] FIG. 8 is a refrigerant circuit diagram of a refrigeration cycle device according to a first modified example of the embodiment. Next, a modified example of the embodiment will be described. The refrigeration cycle device 1001 according to the first modified example of the embodiment is different from the refrigeration cycle device 1000 of the embodiment in that a two-way valve 15 is provided in place of the third expansion valve 3 c in the middle of the fifth heat source device refrigerant pipe 115. Since the refrigerant circuit of the refrigeration cycle device 1001 according to the first modified example of the embodiment is the same as the refrigerant circuit of the refrigeration cycle device 1000 of the embodiment except for the difference described above, description of the same parts will be omitted.

[0111] The two-way valve 15 is a valve capable of opening and closing the flow path, and is controlled by the control device 13.

[0112] Like the refrigeration cycle device 1000 of the embodiment, the refrigeration cycle device 1001 according to the first modified example of the embodiment can form the first load heat medium cooling refrigerant circulation circuit 601, the first load heat medium heating refrigerant circulation circuit 602, the second load heat medium heating refrigerant circulation circuit 603, and the cooling and heating simultaneous refrigerant circulation circuit 604. The first load heat medium cooling refrigerant circulation circuit 601 is controlled so that the degree of opening of the first expansion valve 3 a becomes a maximum, the degree of opening of the second expansion valve 3b becomes a predetermined degree of opening at which the refrigerant that has passed through the 06 09 24 second expansion valve 3b is decompressed, and the two-way valve 15 closes the flow path. The first load heat medium heating refrigerant circulation circuit 602 is controlled so that the degree of opening of the first expansion valve 3 a becomes a predetermined degree of opening at which the refrigerant that has passed through the first expansion valve 3a is decompressed, the degree of opening of the second expansion valve 3b becomes a maximum, and the two-way valve 15 closes the flow path. The second load heat medium heating refrigerant circulation circuit 603 is controlled so that the degree of opening of the first expansion valve 3 a becomes a predetermined degree of opening at which the refrigerant that has passed through the first expansion valve 3a is decompressed, the degree of opening of the second expansion valve 3b becomes a minimum, and the two-way valve 15 opens the flow path. The cooling and heating simultaneous refrigerant circulation circuit 604 is controlled so that the degree of opening of the first expansion valve 3 a becomes a minimum, the opening degree of the second expansion valve 3b becomes a predetermined opening degree at which the refrigerant that has passed through the second expansion valve 3b is decompressed, and the two-way valve 15 opens the flow path.

[0113] Even when the two-way valve 15 is provided instead of the third expansion valve 3c as in the refrigeration cycle device 1001 according to the first modified example of the embodiment, the first load heat medium cooling refrigerant circulation circuit 601, the first load heat medium heating refrigerant circulation circuit 602, the second load heat medium heating refrigerant circulation circuit 603, and the cooling and heating simultaneous refrigerant circulation circuit 604 can be formed as in the refrigeration cycle device 1000 according to the embodiment, and thus the same effects can be achieved. 06 09 24 Further, even when the two-way valve 15 is provided instead of the first expansion valve 3a, or the two-way valve 15 is provided instead of the second expansion valve 3b, the first load heat medium cooling refrigerant circulation circuit 601, the first load heat medium heating refrigerant circulation circuit 602, the second load heat medium heating refrigerant circulation circuit 603, and the cooling and heating simultaneous refrigerant circulation circuit 604 can be formed as in the refrigeration cycle device 1000 according to the embodiment, and thus the same effects can be achieved.

[0115] That is, as in the refrigeration cycle device 1001 according to the first modified example of the embodiment, the following effects can be obtained, even in a case in which there is provided a configuration, as an additional configuration, in which the flow path switching device includes two four-way valves (the four-way valves 4a and 4b), two expansion valves (two of the expansion valves 3a, 3b and 3c) and a two-way valve 15, and when the first load heat medium heating refrigerant circulation circuit 602 is formed by the flow path switching device, the refrigerant circulates in the order of the discharge port of the compressor 1, the first utilization-side heat exchanger 21, at least one of the two expansion valves, the heat source-side heat exchanger 2, and the suction port of the compressor 1, the two-way valve 15 or one of the two expansion valves closes the flow path between the discharge port of the compressor 1 and the second utilization-side heat exchanger 31, and the second utilization-side heat exchanger 31 communicates with the flow path between the heat source-side heat exchanger 2 and the suction port of the compressor 1, and when the second load heat medium heating refrigerant circulation circuit 603 is formed by the flow path switching device, the refrigerant circulates in the 06 09 24 order of the discharge port of the compressor 1, the second utilization-side heat exchanger 31, at least one of the two expansion valves, the heat source-side heat exchanger 2, and the suction port of the compressor 1, the two-way valve 15 or one of the two expansion valves closes the flow path between the discharge port of the compressor 1 and the first utilization-side heat exchanger 21, and the first utilization-side heat exchanger 21 communicates with the flow path between the heat source-side heat exchanger 2 and the suction port of the compressor 1, and when the cooling and heating simultaneous refrigerant circulation circuit 604 is formed by the flow path switching device, the refrigerant circulates in the order of the discharge port of the compressor 1, the second utilization-side heat exchanger 31, at least one of the two expansion valves, the first utilization-side heat exchanger 21, and the suction port of the compressor 1, the two-way valve or one of the two expansion valves closes the flow path between the discharge port of the compressor 1 and the heat source-side heat exchanger 2, and the heat source-side heat exchanger 2 communicates with the flow path between the first utilization-side heat exchanger 21 and the suction port of the compressor 1, and when the first load heat medium cooling refrigerant circulation circuit 601 is formed by the flow path switching device, the refrigerant circulates in the order of the discharge port of the compressor 1, the heat source-side heat exchanger 2, at least one of the two expansion valves, the first utilization-side heat exchanger 21, and the suction port of the compressor 1, the two-way valve 15 or one of the two expansion valves closes the flow path between the discharge port of the compressor 1 and the second utilization-side heat exchanger 31, and the second utilization-side heat exchanger 31 communicates with the flow path between the first utilization-side heat exchanger 21 and the suction port of the compressor 1, the following effects are obtained. That is, with such an additional configuration, when the first load heat medium cooling refrigerant circulation circuit 601, 06 09 24 57 the first load heat medium heating refrigerant circulation circuit 602, the second load heat medium heating refrigerant circulation circuit 603, and the cooling and heating simultaneous refrigerant circulation circuit 604 are formed, it is possible to obtain a configuration in which the refrigerant accumulated in the heat exchanger that is not included in each of the refrigerant circulation circuits j oins the refrigerant circulating in the refrigerant circulation circuit, and the shortage of refrigerant can be curbed.

[0116] FIG. 9 is a refrigerant circuit diagram of a refrigeration cycle device according to a second modified example of the embodiment. The refrigeration cycle device 1002 according to the second modified example of the embodiment is different from the refrigeration cycle device 1000 according to the embodiment in that the second four-way valve 4b is not provided, the first heat source device refrigerant pipe 111 and the tenth heat source device refrigerant pipe 120 communicate with each other, and the first heat source device refrigerant pipe 111 and the tenth heat source device refrigerant pipe 120 communicate with each other. Since the refrigerant circuit of the refrigeration cycle device 1002 according to the second modified example of the embodiment is the same as the refrigerant circuit of the refrigeration cycle device 1000 of the embodiment except for the differences described above, description of the same parts will be omitted.

[0117] The refrigeration cycle device 1002 according to the second modified example of the embodiment cannot form the first load heat medium cooling refrigerant circulation circuit 601, but can form the first load heat medium heating refrigerant circulation circuit 602, the second load heat medium heating refrigerant circulation circuit 603, and the cooling and heating simultaneous refrigerant circulation circuit 604, as in the refrigeration cycle device 1000 according to the embodiment. Thus, when the 06 09 24 refrigeration cycle device 1002 according to the second modified example of the embodiment forms the first load heat medium heating refrigerant circulation circuit 602, the second load heat medium heating refrigerant circulation circuit 603, and the cooling and heating simultaneous refrigerant circulation circuit 604, as in the refrigeration cycle device 1000 according to the embodiment, the refrigerant accumulated in the heat exchanger that is not included in each of the refrigerant circulation circuits j oins the refrigerant circulating in the refrigerant circulation circuit, and thus the shortage of refrigerant can be curbed.

[0118] Further, as in the refrigeration cycle device 1001 according to the first modified example of the embodiment, the refrigeration cycle device 1002 according to the second modified example of the embodiment can form the first load heat medium heating refrigerant circulation circuit 602, the second load heat medium heating refrigerant circulation circuit 603, and the cooling and heating simultaneous refrigerant circulation circuit 604 even when any one of the first expansion valve 3 a, the second expansion valve 3b, and the third expansion valve 3c is replaced with the two-way valve 15.

[0119] That is, as in the refrigeration cycle device 1002 according to the second modified example of the embodiment, the following effects can be obtained, even in a case in which there is provided a configuration, as an additional configuration, in which the flow path switching device includes a four-way valve 4a, two expansion valves, and a two-way valve, and when the first load heat medium heating refrigerant circulation circuit 602 is formed by the flow path switching device, the refrigerant circulates in the order of the discharge port of the compressor 1, the first utilization-side heat exchanger 21, at least one of the two expansion valves, the heat source-side heat exchanger 2, and 06 09 24 the suction port of the compressor 1, the two-way valve 15 or one of the two expansion valves closes the flow path between the discharge port of the compressor 1 and the second utilization-side heat exchanger 31, and the second utilization-side heat exchanger 31 communicates with the flow path between the heat source-side heat exchanger 2 and the suction port of the compressor 1, and when the second load heat medium heating refrigerant circulation circuit 603 is formed by the flow path switching device, the refrigerant circulates in the order of the discharge port of the compressor 1, the second utilization-side heat exchanger 31, at least one of the two expansion valves, the heat source-side heat exchanger 2, and the suction port of the compressor 1, the two-way valve 15 or one of the two expansion valves closes the flow path between the discharge port of the compressor 1 and the first utilization-side heat exchanger 21, and the first utilization-side heat exchanger 21 communicates with the flow path between the heat source-side heat exchanger 2 and the suction port of the compressor 1, and when the cooling and heating simultaneous refrigerant circulation circuit 604 is formed by the flow path switching device, the refrigerant circulates in the order of the discharge port of the compressor 1, the second utilization-side heat exchanger 31, at least one of the two expansion valves, the first utilization-side heat exchanger 21, and the suction port of the compressor 1, the two-way valve or one of the two expansion valves closes the flow path between the discharge port of the compressor 1 and the heat source-side heat exchanger 2, and the heat source-side heat exchanger 2 communicates with the flow path between the first utilization-side heat exchanger 21 and the suction port of the compressor 1. That is, with such an additional configuration, when the first load heat medium heating refrigerant circulation circuit 602, the second load heat medium heating refrigerant circulation circuit 603, and the cooling and heating simultaneous refrigerant circulation circuit 604 are formed, it is possible to obtain a configuration in which the refrigerant 06 09 24 accumulated in the heat exchanger that is not included in each of the refrigerant circulation circuits joins the refrigerant circulating in the refrigerant circulation circuit, and the shortage of refrigerant can be curbed.

[0120] FIG. 10 is a refrigerant circuit diagram of a refrigeration cycle device according to a third modified example of the embodiment. The refrigeration cycle device 1003 according to the third modified example of the embodiment is different from the refrigeration cycle device 1000 according to the embodiment in that the second four-way valve 4b is not included, the first heat source device refrigerant pipe 111 and the tenth heat source device refrigerant pipe 120 communicate with each other, and the first heat source device refrigerant pipe 111 and the tenth heat source device refrigerant pipe 120 communicate with each other, in that a two-way valve 16 is provided instead of the second expansion valve 3b, and in that a two-way valve 17 is provided instead of the third expansion valve 3 c. Since the refrigerant circuit of the refrigeration cycle device 1003 according to the third modified example of the embodiment is the same as the refrigerant circuit of the refrigeration cycle device 1000 of the embodiment except for the differences described above, description of the same parts will be omitted. Also, the two-way valves 16 and 17 are the same as the two-way valve 15 described in the first modified example of the embodiment, and thus description thereof will be omitted.

[0121] The refrigeration cycle device 1003 according to the third modified example of the embodiment cannot form the first load heat medium cooling refrigerant circulation circuit 601 and the cooling and heating simultaneous refrigerant circulation circuit 604, but can form the first load heat medium heating refrigerant circulation circuit 602 and the second load heat medium heating refrigerant circulation circuit 603, as in the 06 09 24 refrigeration cycle device 1000 according to the embodiment. The first load heat medium heating refrigerant circulation circuit 602 is controlled so that the degree of opening of the first expansion valve 3 a becomes a predetermined degree of opening at which the refrigerant that has passed through the first expansion valve 3a is decompressed, and the two-way valve 16 opens the flow path, and the two-way valve 17 closes the flow path. The second load heat medium heating refrigerant circulation circuit 603 is controlled so that the two-way valve 16 closes the flow path, and the two-way valve 17 opens the flow path. Therefore, as in the refrigeration cycle device 1000 according to the embodiment, the refrigeration cycle device 1003 according to the third modified example of the embodiment has an effect in which, when the first load heat medium heating refrigerant circulation circuit 602 and the second first load heat medium heating refrigerant circulation circuit 603 are formed, the refrigerant accumulated in the heat exchanger that is not included in each of the refrigerant circulation circuits joins the refrigerant circulating in the refrigerant circulation circuit, and thus the shortage of refrigerant can be curbed.

[0122] That is, as in the refrigeration cycle device 1003 according to the third modified example of the embodiment, the following effects can be obtained, even in the case in which the expansion valve 3a for decompressing the refrigerant is provided as an additional configuration, and the flow path switching device includes the four-way valve 4a and the two two-way valves 16 and 17, and when the first load heat medium heating refrigerant circulation circuit 602 is formed by the flow path switching device, the refrigerant circulates in the order of the discharge port of the compressor 1, the first utilization-side heat exchanger 21, the expansion valve 3a, the heat source-side heat exchanger 2, and the suction port of the compressor 1, the two-way valve 17 closes the 06 09 24 flow path between the discharge port of the compressor 1 and the second utilization-side heat exchanger 31, and the second utilization-side heat exchanger 31 communicates with the flow path between the heat source-side heat exchanger 2 and the suction port of the compressor 1, and when the second load heat medium heating refrigerant circulation circuit 603 is formed by the flow path switching device, the refrigerant circulates in the order of the discharge port of the compressor 1, the second utilization-side heat exchanger 31, the expansion valve 3a, the heat source-side heat exchanger 2, and the suction port of the compressor 1, the two-way valve 16 closes the flow path between the discharge port of the compressor 1 and the first utilization-side heat exchanger 21, and the first utilization-side heat exchanger 21 communicates with the flow path between the heat source-side heat exchanger 2 and the suction port of the compressor 1. That is, with such an additional configuration, when the first load heat medium heating refrigerant circulation circuit 602 and the second load heat medium heating refrigerant circulation circuit 603 are formed, it is possible to obtain a configuration in which the refrigerant accumulated in the heat exchanger that is not included in each of the refrigerant circulation circuits joins the refrigerant circulating in the refrigerant circulation circuit, and the shortage of refrigerant can be curbed.

[0123] FIG. 11 is a refrigerant circuit diagram of a refrigeration cycle device according to a fourth modified example of the embodiment. The refrigeration cycle device 1003 according to the fourth modified example of the embodiment is different from the refrigeration cycle device 1000 of the embodiment in that the second four-way valve 4b is not included, and the first heat source device refrigerant pipe 111 and the tenth heat source device refrigerant pipe 120 communicate with each other, and the first heat source device refrigerant pipe 111 and the tenth heat source device refrigerant pipe 120 06 09 24 communicate with each other, and in that first expansion valve 3a is not provided. Since the refrigerant circuit of the refrigeration cycle device 1004 according to the fourth modified example of the embodiment is the same as the refrigerant circuit of the refrigeration cycle device 1000 of the embodiment except for the differences described above, description of the same parts will be omitted.

[0124] The refrigeration cycle device 1004 according to the fourth modified example of the embodiment cannot form the first load heat medium cooling refrigerant circulation circuit 601 and the cooling and heating simultaneous refrigerant circulation circuit 604, but can form the first load heat medium heating refrigerant circulation circuit 602 and the second load heat medium heating refrigerant circulation circuit 603 as in the refrigeration cycle device 1000 according to the embodiment. The first load heat medium heating refrigerant circulation circuit 602 is controlled so that degree of opening of the second expansion valve 3b becomes a predetermined degree of opening at which the refrigerant that has passed through the second expansion valve 3b is decompressed, and the degree of opening of the third expansion valve 3c becomes a minimum. The second load heat medium heating refrigerant circulation circuit 603 is controlled so that the degree of opening of the second expansion valve 3b becomes a minimum, and the degree of opening of the third expansion valve 3 c becomes a predetermined degree of opening at which the refrigerant that has passed through the third expansion valve 3c is decompressed. Therefore, as in the refrigeration cycle device 1000 of the embodiment, when the refrigeration cycle device 1004 according to the fourth modified example of the embodiment forms the first load heat medium heating refrigerant circulation circuit 602 and the second load heat medium heating refrigerant circulation circuit 603, the refrigerant accumulated in the heat exchanger that is not included in each of the 06 09 24 refrigerant circulation circuits joins the refrigerant circulating in the refrigerant circulation circuit, and thus the shortage of refrigerant can be curbed.

[0125] That is, as in the refrigeration cycle device 1003 according to the third modification of the embodiment, the following effects can be obtained, even in the case in which the flow path switching device includes a four-way valve 4a, a first expansion valve (corresponding to the second expansion valve 3b), and a second expansion valve (corresponding to the third expansion valve 3c), as an additional configuration, and when the first load heat medium heating refrigerant circulation circuit 602 is formed by the flow path switching device, the refrigerant circulates in the order of the discharge port of the compressor 1, the first utilization-side heat exchanger 21, the first expansion valve, the heat source-side heat exchanger 2, and the suction port of the compressor 1, the second expansion valve closes the flow path between the discharge port of the compressor 1 and the second utilization-side heat exchanger 31, and the second utilization-side heat exchanger 31 communicates with the flow path between the heat source-side heat exchanger 2 and the suction port of the compressor 1, and when the second load heat medium heating refrigerant circulation circuit 603 is formed by the flow path switching device, the refrigerant circulates in the order of the discharge port of the compressor 1, the second utilization-side heat exchanger 31, the second expansion valve, the heat source-side heat exchanger 2, and the suction port of the compressor 1, the first expansion valve closes the flow path between the discharge port of the compressor 1 and the first utilization-side heat exchanger 21, and first utilization-side heat exchanger 21 communicates with the flow path between the heat source-side heat exchanger 2 and the suction port of the compressor 1. That is, with such an additional configuration, when the first load heat medium heating refrigerant circulation circuit 602 and the second load 06 09 24 heat medium heating refrigerant circulation circuit 603 are formed, it is possible to obtain a configuration in which the refrigerant accumulated in the heat exchanger that is not included in each of the refrigerant circulation circuits j oins the refrigerant circulating in the refrigerant circulation circuit, and the shortage of refrigerant can be curbed. [Reference Signs List]

[0126] 1 Compressor 2 Heat source-si de heat exchanger 3 Pressure reducing device 3a First expansion valve 32 Second expansion valve 3c Third expansion valve 4 Switching valve group 4a First four-way valve 4b Second four-way valve 5 Accumulator 6 Closing device 6a First stop valve 6b Second stop valve 6c Third stop valve 6d Fourth stop valve 7 Compressor shell temperature sensor 8 Discharge temperature sensor 9 Discharge pressure sensor 10 Heat source-side heat exchanger temperature sensor 06 09 24 11 Heat source heat medium temperature sensor 12 Heat source-side liquid pipe temperature sensor 13 Control device 13a Processor 13b Memory 13c Hardware interface 15 to 17 Two-way valve 21 First utilization-side heat exchanger 22 First utilization-side heat exchanger temperature sensor 23 First load heat medium temperature sensor 24 First utilization-side liquid pipe temperature sensor 31 Second utilization-side heat exchanger 32 Second utilization-side liquid pipe temperature sensor 33 Second load heat medium inflow-side temperature sensor 34 Second load heat medium outflow-side temperature sensor 50 Receiving part 51 Transmitting part 52 Storage part 53 Control part 100 Heat source device 110 Heat source device refrigerant pipe 111 First heat source device refrigerant pipe 112 Second heat source device refrigerant pipe 113 Third heat source device refrigerant pipe 114 Fourth heat source device refrigerant pipe 06 09 24 115 Fifth heat source device refrigerant pipe 116 Sixth heat source device refrigerant pipe 117 Seventh heat source device refrigerant pipe 118 Eighth heat source device refrigerant pipe 119 Ninth heat source device refrigerant pipe 120 Tenth heat source device refrigerant pipe 121 Eleventh heat source device refrigerant pipe 200 First utilization device 210 First utilization-side liquid refrigerant pipe 220 First utilization-side gas refrigerant pipe 300 Second utilization device 310 Second utilization-side liquid refrigerant pipe 320 Second utilization-side gas refrigerant pipe 330 second load heat medium inflow-side pipe 340 Second load heat medium outflow-side pipe 400 Remote controller 501 First connecting pipe 502 Second connecting pipe 503 Third connecting pipe 504 Fourth connecting pipe 600 Refrigerant circulation circuit 601 First load heat medium cooling refrigerant circulation circuit 602 First load heat medium heating refrigerant circulation circuit 603 Second load heat medium heating refrigerant circulation circuit 604 Cooling and heating simultaneous refrigerant circulation circuit 1000 to 1004 Refrigeration cycle device CXI

Claims

09 10 24[CLAIMS]

1. A refrigeration cycle device (1000, 1001, 1002, 1003, 1004) comprising:5            a compressor (1) configured to suction a refrigerant from a suction port,compress the suctioned refrigerant, and discharge the compressed refrigerant from a discharge port;a heat source-side heat exchanger (2) configured to perform heat exchange between the refrigerant and a heat source heat medium;10            a first utilization-side heat exchanger (21) configured to perform heat exchangebetween the refrigerant and a first load heat medium;a second utilization-side heat exchanger (31) configured to perform heat exchange between the refrigerant and a second load heat medium; anda flow path switching device (4) configured to switch a refrigerant circulation15    circuit in which the refrigerant circulates,wherein the flow path switching device (4) is configured to switch between a second load heat medium heating refrigerant circulation circuit (603)which is a refrigerant circulation circuit in which the heat source-side heat exchanger (2) and the second utilization-side heat exchanger (31) are included, the first utilization-side20 heat exchanger (21) is not included, the second utilization-side heat exchanger (31) functions as a condenser, the heat source-side heat exchanger (2) functions as an evaporator, and the refrigerant which has passed through the heat source-side heat exchanger (2) is suctioned from the suction port of the compressor (1), anda first load heat medium heating refrigerant circulation circuit (602)25 which is a refrigerant circulation circuit in which the heat source-side heat exchanger (2) and the first utilization-side heat exchanger (21) are included, the second utilization-side heat exchanger (31) is not included, the first utilization-side heat exchanger (21) functions as the condenser, the heat source-side heat exchanger (2) functions as the evaporator, and the refrigerant which has passed through heat source-side heat exchanger30   (2) is suctioned from the suction port of the compressor (1), andwhen the second load heat medium heating refrigerant circulation circuit (603) is formed by the flow path switching device (4), the first utilization-side heat exchanger (21) is arranged to communicate with a flow path between the heat source-side heat09 10 24exchanger (2) of the second load heat medium heating refrigerant circulation circuit (603) and the suction port of the compressor (1), and when the first load heat medium heating refrigerant circulation circuit (602) is formed by the flow path switching device (4), the second utilization-side heat exchanger (31) is arranged to communicate with a flow path between the heat source-side heat exchanger (2) of the first load heat medium heating refrigerant circulation circuit (602) and the suction port of the compressor (1).

2. The refrigeration cycle device (1004) according to claim 1, wherein:the flow path switching device (4) is configured of a four-way valve (4a), a second expansion valve (3b), and a third expansion valve (3c);when the first load heat medium heating refrigerant circulation circuit (602) is formed by the flow path switching device (4), the refrigerant circulates through the discharge port of the compressor (1), the first utilization-side heat exchanger (21), the second expansion valve (3b), the heat source-side heat exchanger (2), and the suction port of the compressor (1) in this order, the third expansion valve (3c) is configured to close a flow path between the discharge port of the compressor (1) and the second utilization-side heat exchanger (31), and the second utilization-side heat exchanger (31) is arranged to communicate with a flow path between the heat source-side heat exchanger (2) and the suction port of the compressor (1); andwhen the second load heat medium heating refrigerant circulation circuit (603) is formed by the flow path switching device (4), the refrigerant circulates through the discharge port of the compressor (1), the second utilization-side heat exchanger (31), the third expansion valve (3c), the heat source-side heat exchanger (2), and the suction port of the compressor (1) in this order, the second expansion valve (3b) is configured to close a flow path between the discharge port of the compressor (1) and the first utilization-side heat exchanger (21), and the first utilization-side heat exchanger (21) is arranged to communicate with the flow path between the heat source-side heat exchanger (2) and the suction port of the compressor (1).

3. The refrigeration cycle device (1003) according to claim 1, further comprising an expansion valve (3) which decompresses the refrigerant,wherein:the flow path switching device (4) is configured of a four-way valve (4a), a first09 10 24two-way valve (16), and a second two-way valve (17), and a first expansion valve (3a);when the first load heat medium heating refrigerant circulation circuit (602) is formed by the flow path switching device (4), the refrigerant circulates through the discharge port of the compressor (1), the first utilization-side heat exchanger (21), the 5 first expansion valve (3a), the heat source-side heat exchanger (2), and the suction port of the compressor (1) in this order, the second two-way valve (17) is configured to close a flow path between the discharge port of the compressor (1) and the second utilizationside heat exchanger (31), and the second utilization-si de heat exchanger (31) is arranged to communicate with a flow path between the heat source-side heat exchanger (2) and the 10 suction port of the compressor (1),when the second load heat medium heating refrigerant circulation circuit (603) is formed by the flow path switching device (4), the refrigerant circulates through the discharge port of the compressor (1), the second utilization-side heat exchanger (31), the first expansion valve (3a), the heat source-side heat exchanger (2), and the suction port of 15 the compressor (1) in this order, the first two-way valve (16) is configured to close a flow path between the discharge port of the compressor (1) and the first utilization-side heat exchanger (21), and the first utilization-side heat exchanger (21) is arranged to communicate with the flow path between the heat source-side heat exchanger (2) and the suction port of the compressor (1).20

4. A refrigeration cycle device (1000, 1001, 1002) comprising:a compressor (1) configured to suction a refrigerant from a suction port, compress the suctioned refrigerant, and discharge the compressed refrigerant from a discharge port;25            a heat source-side heat exchanger (2) configured to perform heat exchangebetween the refrigerant and a heat source heat medium;a first utilization-side heat exchanger (21) configured to perform heat exchange between the refrigerant and a first load heat medium;a second utilization-side heat exchanger (31) configured to perform heat30 exchange between the refrigerant and a second load heat medium; anda flow path switching device (4) configured to switch a refrigerant circulation circuit in which the refrigerant circulates, wherein the flow path switching device (4) is configured to switch between09 10 24a first refrigerant circulation circuit (604) which is a refrigerant circulation circuit in which the second utilization-side heat exchanger (31) functions as an evaporator, the first utilization-side heat exchanger (21) functions as a condenser or a refrigerant circulation circuit in which the second utilization-side heat exchanger (31) 5 functions as the condenser, the first utilization-side heat exchanger (21) functions as the evaporator, wherein the first refrigerant circulation circuit (604) includes the first utilization-side heat exchanger (21) and the second utilization-side heat exchanger (31), and the first refrigerant circulation circuit (604) does not include the heat source-side heat exchanger (2), and10            a second refrigerant circulation circuit (602) which is a first load heat mediumheating refrigerant circulation circuit (602) in which the first heat utilization-side heat exchanger (21) functions as the condenser, the heat source-side heat exchanger (2) functions as the evaporator, the second heat utilization-side heat exchanger (31) is not included, and the refrigerant that has passed through the heat source-side heat exchanger 15   (2) is suctioned from the suction port of the compressor (1),when the first refrigerant circulation circuit (604) is formed by the flow path switching device (4), the heat source-side heat exchanger (2) is arranged to communicate with a flow path between the heat exchanger functioning as the evaporator of the first refrigerant circulation circuit (604) and the suction port of the compressor (1), 20 andwhen the second refrigerant circulation circuit (602) is formed by the flow switching device (4), the second utilization-side heat exchanger (31) is arranged to communicate with a flow path between the heat source-side heat exchanger (2) of the second refrigerant circulation circuit (601, 602) and the suction port of the compressor 25    (1).

5. The refrigeration cycle device (1000, 1001, 1002) according to claim 4 wherein: the first refrigerant circulation circuit (604) is a cooling and heating simultaneous refrigerant circulation circuit (604) in which the second utilization-side heat 30 exchanger (31) functions as the condenser, the first utilization-side heat exchanger (21) functions as the evaporator, and the refrigerant that has passed through the first utilization-side heat exchanger (21) is suctioned from the suction port of the compressor (1).09 10 24

6. The refrigeration cycle device (1001) according to claim 5, wherein:the flow path switching device (4) includes a four-way valve (4a, 4b), two5 expansion valves (3 a, 3b) and a two-way valve (15);when the first load heat medium heating refrigerant circulation circuit (602) is formed by the flow path switching device (4), the refrigerant circulates through the discharge port of the compressor (1), the first utilization-side heat exchanger (21), at least one of the two expansion valves (3 a, 3b), the heat source-side heat exchanger (2), and the10 suction port of the compressor (1) in this order, the two-way valve (15) or one of the two expansion valves (3a, 3b) is configured to close a flow path between the discharge port of the compressor (1) and the second utilization-side heat exchanger (31), and the second utilization-side heat exchanger (31) is arranged to communicate with a flow path between the heat source-side heat exchanger (2) and the suction port of the compressor (1); and15            when the cooling and heating simultaneous refrigerant circulation circuit (604)is formed by the flow path switching device (4), the refrigerant circulates through the discharge port of the compressor (1), the second utilization-side heat exchanger (31), at least one of the two expansion valves (3 a, 3b), the first utilization-side heat exchanger (21), and the suction port of the compressor (1) in this order, the two-way valve (15) or20 one of the two expansion valves (3a, 3b) is configured to close a flow path between the discharge port of the compressor (1) and the heat source-side heat exchanger (2), and the heat source-side heat exchanger (2) is arranged to communicate with a flow path between the heat source-side heat exchanger (2) and the suction port of the compressor (1).

7. 25            A refrigeration cycle device (1000, 1001) comprising:a compressor (1) configured to suction a refrigerant from a suction port, compress the suctioned refrigerant, and discharge the compressed refrigerant from a discharge port;a heat source-side heat exchanger (2) configured to perform heat exchange30 between the refrigerant and a heat source heat medium;a first utilization-side heat exchanger (21) configured to perform heat exchange between the refrigerant and a first load heat medium;a second utilization-side heat exchanger (31) configured to perform heat09 10 24exchange between the refrigerant and a second load heat medium; anda flow path switching device (4) configured to switch a refrigerant circulation circuit in which the refrigerant circulates,wherein the flow path switching device (4) is configured to switch among5                     a first load heat medium cooling refrigerant circulation circuit (601) inwhich the second utilization-side heat exchanger (31) is not included, the heat sourceside heat exchanger (2) functions as a condenser, the first utilization-side heat exchanger (21) functions as an evaporator, and the refrigerant that has passed through the first utilization-side heat exchanger (21) is suctioned from the suction port of the compressor10 (1),a first load heat medium heating refrigerant circulation circuit (602) in which the second utilization-side heat exchanger (31) is not included, the first utilizationside heat exchanger (21) functions as the condenser, the heat source-side heat exchanger (2) functions as the evaporator, and the refrigerant that has passed through the heat15 source-side heat exchanger (2) is suctioned from the suction port of the compressor (1), a second load heat medium heating refrigerant circulation circuit (603)in which the second utilization-side heat exchanger (31) functions as the condenser, the heat source-side heat exchanger (2) functions as the evaporator, and the refrigerant that has passed through the heat source-side heat exchanger (2) is suctioned from the suction20 port of the compressor (1),a cooling and heating simultaneous refrigerant circulation circuit (604) in which the second utilization-side heat exchanger (31) functions as the condenser, the first utilization-side heat exchanger (21) functions as the evaporator, and the refrigerant that has passed through the first utilization-side heat exchanger (21) is suctioned from the25 suction port of the compressor (1), andwhen the first load heat medium cooling refrigerant circulation circuit (601) or the first load heat medium heating refrigerant circulation circuit (602) is formed by the flow switching device (4), the second utilization-side heat exchanger (31) is arranged to communicate with a flow path between the heat source-side heat exchanger (2) or the30 first utilization-side heat exchanger (21) which functions as the evaporator and the suction port of the compressor (1).

8. The refrigeration cycle device (1001) according to claim 7, wherein:09 10 24the flow path switching device (4) is configured of two four-way valves (4a, 4b), two expansion valves (3a, 3b) and a two-way valve (15);when the first load heat medium heating refrigerant circulation circuit (602) is formed by the flow path switching device (4), the refrigerant circulates through the discharge port of the compressor (1), the first utilization-side heat exchanger (21), at least one of the two expansion valves (3 a, 3b), the heat source-side heat exchanger (2), and the suction port of the compressor (1) in this order, the two-way valve (15) or one of the two expansion valves (3a, 3b) is configured to close a flow path between the discharge port of the compressor (1) and the second utilization-side heat exchanger (31), and the second utilization-side heat exchanger (31) is arranged to communicate with a flow path between the heat source-side heat exchanger (2) and the suction port of the compressor (1);when the second load heat medium heating refrigerant circulation circuit (603) is formed by the flow path switching device (4), the refrigerant circulates through the discharge port of the compressor (1), the second utilization-side heat exchanger (31), at least one of the two expansion valves (3 a, 3b), the heat source-side heat exchanger (2), and the suction port of the compressor (1) in this order, the two-way valve (15) or one of the two expansion valves (3a, 3b) is configured to close a flow path between the discharge port of the compressor (1) and the first utilization-side heat exchanger (21), and the first utilization-side heat exchanger (21) is arranged to communicate with a flow path between the heat source-side heat exchanger (2) and the suction port of the compressor (1);when the first load heat medium cooling refrigerant circulation circuit (601) is formed by the flow path switching device (4), the refrigerant circulates through the discharge port of the compressor (1), the heat source-side heat exchanger (2), at least one of the two expansion valves (3 a, 3b), the first utilization-side heat exchanger (21), and the suction port of the compressor (1) in this order, the two-way valve (15) or one of the two expansion valves (3a, 3b) is configured to close a flow path between the discharge port of the compressor (1) and the second utilization-side heat exchanger (31), and the second utilization-side heat exchanger (31) is arranged to communicate with a flow path between the first utilization-side heat exchanger (21) and the suction port of the compressor (1); andwhen the cooling and heating simultaneous refrigerant circulation circuit (604) is formed by the flow path switching device (4), the refrigerant circulates through thedischarge port of the compressor (1), the second utilization-side heat exchanger (31), at least one of the two expansion valves (3 a, 3b), the first utilization-side heat exchanger (21), and the suction port of the compressor (1) in this order, the two-way valve (15) or one of the two expansion valves (3a, 3b) is configured to close a flow path between the5 discharge port of the compressor (1) and the heat source-side heat exchanger (2), and the heat source-side heat exchanger (2) is arranged to communicate with the flow path between the first utilization-side heat exchanger (21) and the suction port of the compressor (1).

9. 10            The refrigeration cycle device (1000, 1001, 1002, 1003, 1004) according to anyone of claims 1 to 8, wherein:the heat source heat medium is air in an outdoor space;the first load heat medium is air in an indoor space; and the second load heat medium is water.15CXI

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