WO2022137510A1

WO2022137510A1 - Refrigeration cycle device

Info

Publication number: WO2022137510A1
Application number: PCT/JP2020/048765
Authority: WO
Inventors: 康剛木村; 和希外川; 浩平葛西
Original assignee: 三菱電機株式会社
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2022-06-30
Also published as: JP7471460B2; JPWO2022137510A1; GB202306768D0; DE112020007879T5; GB2615469A

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

Refrigeration cycle device

This disclosure relates to a refrigeration cycle device.

Conventionally, as in Patent Document 1, for example, a heat source side heat exchanger (corresponding to the outdoor heat exchanger of Patent Document 1) that exchanges heat between a heat source heat medium such as air in an outdoor space and a refrigerant, and an indoor room. A first user-side heat exchanger that exchanges heat with a first load heat medium such as air in a space (corresponding to the heat exchanger for indoor air conditioning in Patent Document 1) and a second load heat medium such as water. A refrigerating cycle apparatus having a second user-side heat exchanger (corresponding to the hot water supply heat exchanger of Patent Document 1) that exchanges heat with the heat is known. Such a refrigerating cycle device has a four-way valve and an electromagnetic valve for switching the flow path, and a refrigerant circulation circuit for heating the first load heat medium by switching between the four-way valve and the electromagnetic valve (refrigerant for heating operation of Patent Document 1). (Applicable to the portion through which the refrigerant flows) and the refrigerant circulation circuit for heating the second load heat medium (corresponding to the portion through which the refrigerant in the hot water supply operation of Patent Document 2 flows) are switched.

International Publication No. 2017/20365

In the refrigeration cycle apparatus of Patent Document 1, in a state where a refrigerant circulation circuit for heating the first load heat medium is formed, a flow path including a second utilization side heat exchanger is closed at both ends (second of Patent Document 1). In a state where the flow path from the electromagnetic valve to the third decompression device is equivalent) and a refrigerant circulation circuit for heating the second load heat medium is formed, both ends including the first utilization side heat exchanger are closed. It has a flow path (corresponding to the flow path from the first electromagnetic valve of Patent Document 1 to the second decompression device). When the flow path including the heat exchanger is closed at both ends, if the refrigerant is accumulated in the heat exchanger included in the flow path with both ends closed when the refrigerant circulation circuit is switched, the refrigerant is accumulated. The existing refrigerant cannot be used for operation, resulting in a shortage of refrigerant.

The object of the present disclosure is to obtain a refrigerating cycle device that suppresses a refrigerant shortage when the refrigerant circulation circuit is switched.

The refrigeration cycle apparatus according to one aspect of the present disclosure is a heat between a compressor that sucks a refrigerant from a suction port, compresses the sucked refrigerant, and discharges the compressed refrigerant from a discharge port, and heat between the refrigerant and the first heat medium. A first heat exchanger that exchanges heat, a second heat exchanger that exchanges heat between the refrigerant and the second heat medium, and heat exchange between the refrigerant and the third heat medium. A third heat exchanger to be performed and a flow path switching device for switching a refrigerant circulation circuit in which the refrigerant circulates are provided, and the flow path switching device includes the third heat exchanger and the third heat exchanger evaporates. Either a first heat exchanger or a second heat exchanger that includes a first heat exchanger and a second heat exchanger and a first refrigerant circulation circuit that is a refrigerant circulation circuit that functions as a vessel or condenser. When one of them switches between the second refrigerant circulation circuit, which is a refrigerant circulation circuit that functions as an evaporator and does not include the third heat exchanger, and the flow path switching device forms the second refrigerant circulation circuit. The third heat exchanger communicates with the flow path between the heat exchanger, which functions as the evaporator of the second refrigerant circulation circuit, and the suction port of the compressor.

In the refrigeration cycle apparatus according to one aspect of the present disclosure, even when the second refrigerant circulation circuit not including the third heat exchanger is formed, the refrigerant accumulated in the third heat exchanger can be used as an evaporator. It can flow into the flow path between the functioning heat exchanger and the suction port of the compressor, and can suppress the refrigerant shortage when the refrigerant circulation circuit is switched.

It is a refrigerant circuit diagram of the refrigerating cycle apparatus which concerns on embodiment. It is a hardware block diagram about the control apparatus of the refrigeration cycle apparatus which concerns on embodiment. It is a functional block diagram about the refrigerating cycle apparatus which concerns on embodiment. It is a refrigerant circuit diagram at the time of the first load heat medium cooling operation of the refrigeration cycle apparatus which concerns on embodiment. It is a refrigerant circuit diagram at the time of the first load heat medium heating operation of the refrigeration cycle apparatus which concerns on embodiment. It is a refrigerant circuit diagram at the time of the second load heat medium heating operation of the refrigerating cycle apparatus which concerns on embodiment. It is a refrigerant circuit diagram at the time of simultaneous cooling and heating operation of the refrigerating cycle apparatus which concerns on embodiment. It is a refrigerant circuit diagram of the refrigerating cycle apparatus which concerns on the 1st modification of embodiment. It is a refrigerant circuit diagram of the refrigerating cycle apparatus which concerns on the 2nd modification of embodiment. It is a refrigerant circuit diagram of the refrigerating cycle apparatus which concerns on the 3rd modification of embodiment. It is a refrigerant circuit diagram of the refrigerating cycle apparatus which concerns on the 4th modification of embodiment.

The refrigeration cycle apparatus according to the embodiment of the present disclosure will be described with reference to the drawings. The present disclosure is not limited to the following embodiments, and can be modified or omitted without departing from the spirit of the present disclosure. Further, it is also possible to appropriately combine the configuration and the additional configuration of the refrigeration cycle apparatus according to each embodiment and the modification. Further, the same reference numerals are given to common elements in each figure, and duplicate description will be omitted.

Embodiment.
FIG. 1 is a refrigerant circuit diagram of the refrigeration cycle device according to the embodiment. The refrigeration cycle device 1000 includes a heat source machine 100, a first utilization device 200, a second utilization device 300, a remote controller 400, a first connection pipe 501, a second connection pipe 502, and a third. A connecting pipe 503 and a fourth connecting pipe 504 are provided. The refrigeration cycle device 1000 includes a heat source machine 100, a first utilization device 200, a second utilization device 300, a first connection pipe 501, a second connection pipe 502, a third connection pipe 503, and a fourth connection. A refrigerant circulation circuit 600 through which the refrigerant circulates is formed by the pipe 504.

Further, the refrigerating cycle device 1000 can perform four types of operations by switching the refrigerant circulation circuit 600, which are the first load heat medium cooling operation, the first load heat medium heating operation, and the second load, respectively. It is called heat medium heating operation and cooling heating simultaneous operation. Since the refrigerant circulation circuit 600 is different for each of the four types of operation, when separately described, the refrigerant circulation circuit 600 at the time of the first load heat medium cooling operation is referred to as the first load heat medium cooling refrigerant circulation circuit 601. The refrigerant circulation circuit 600 during the first load heat medium heating operation is referred to as the first load heat medium heating refrigerant circulation circuit 602, and the refrigerant circulation circuit 600 during the second load heat medium heating operation is referred to as the second load heat medium. The heating refrigerant circulation circuit 603 and the refrigerant circulation circuit 600 at the time of simultaneous cooling and heating operation are referred to as cooling and heating simultaneous refrigerant circulation circuit 604, respectively.

The heat source machine 100 will be described. The heat source machine 100 compresses the refrigerant and causes heat exchange between the heat source heat medium passing through the heat source machine 100 and the refrigerant. In the embodiment, it is assumed that the heat source unit 100 is an outdoor unit and the heat source heat medium is air in the outdoor space. The heat source machine 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, and a discharge temperature sensor 8. It has 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 tube temperature sensor 12, and a control device 13. Further, in the heat source machine 100, the compressor 1, the heat source side heat exchanger 2, the decompression device 3, the switching valve group 4, the accumulator 5, and the closing device 6 are connected so that the refrigerant can flow through the heat source machine refrigerant pipe 110, respectively. Has been done. Since the refrigerant circulation circuit 600 is switched by the pressure reducing device 3 and the switching valve group 4 as described later, the pressure reducing device 3 and the switching valve group 4 correspond to the flow path switching device for switching the refrigerant circulation circuit.

The compressor 1 sucks the refrigerant from the suction port, compresses the sucked refrigerant into a high-temperature and high-pressure gas state, and discharges the compressed refrigerant from the discharge port. Further, the compressor 1 of the embodiment has a compression unit that compresses the refrigerant, an electric motor that drives the compression unit, and a shell that covers the compression unit and the electric unit. As the compression unit of the compressor 1, an existing compression unit such as a rotary type, a scroll type, a screw type or a vane type is used. The rotation speed of the electric motor of the compressor 1 can be changed by inverter control, and the capacity of the compressor 1 can be controlled by changing the rotation speed of the electric motor.

The heat source side heat exchanger 2 exchanges heat between the heat source heat medium and the refrigerant passing through the 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 distributes and transfers the main heat exchanger and the sub heat exchanger that exchange heat between the air in the outdoor space and the refrigerant, and the refrigerant flowing into the main heat exchanger. It has a header and a distributor that collect the refrigerant flowing in from the heat tube. Further, the heat source side heat exchanger 2 of the embodiment is composed of a fin-and-tube type heat exchanger. The fin-and-tube heat exchanger is a heat exchanger having a plurality of heat transfer tubes in which a flow path through which a refrigerant flows is formed and a plurality of heat radiation fins provided in a direction orthogonal to the heat transfer tubes. In the embodiment, a header is connected to one end of the flow path of the main heat exchanger of the heat source side heat exchanger 2, and one end of the distributor is connected to the other end. Further, one end of the flow path of the auxiliary heat exchanger is connected to the other end of the distributor. That is, in the embodiment, one end of the heat source side heat exchanger 2 is a header, and the other end is the other end of the flow path of the secondary 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).

The decompression device 3 decompresses the passing refrigerant. The pressure reducing device 3 of the embodiment is composed of three expansion valves, and each expansion valve is referred to as a first expansion valve 3a, a second expansion valve 3b, and a third expansion valve 3c. Each expansion valve has a flow path hole forming a flow path through which the refrigerant flows and a valve body that can be moved so as to open and close the flow path hole, and the opening area of the flow path is controlled by controlling the position of the valve body. Is an electronic expansion valve that can be adjusted arbitrarily. Further, for the sake of explanation, the opening degree is used as an index indicating the opening area of the expansion valve. The larger the opening, the wider the opening area of the flow path of the expansion valve. When the opening is the maximum, the opening area is the maximum, and when the opening is the maximum, the pressure of the refrigerant passing through the expansion valve does not decrease. When the opening degree is the minimum, it is ideal that the expansion valve is completely closed, but in reality, a gap is created between the flow path hole and the valve body, so that a very small amount of refrigerant leaks from the gap. Therefore, when the opening degree is the minimum, most of the refrigerant cannot pass through the expansion valve, but a very small amount of refrigerant passes through the expansion valve.

The switching valve group 4 switches the flow path of the refrigerant. The switching valve group 4 of the embodiment is composed of two four-way valves, and each four-way valve is referred to as a first four-way valve 4a and a second four-way valve 4b. The four-way valve has four ports, A port, B port, C port and D port. Further, the four-way valve can switch between a state in which the A port and the B port are communicated and the C port and the D port are communicated, and a state in which the A port and the D port are communicated and the B port and the C port are communicated. can. The four ports of the first four-way valve 4a are numbered A port as 4aa, B port as 4ab, C port as 4ac, and D port as 4ad, respectively. The four ports of the second four-way valve 4b are numbered A port as 4ba, B port as 4bb, C port as 4bc, and D port as 4bd, respectively.

When the gas-liquid mixed refrigerant flows in from the inlet, the accumulator 5 stores the liquid refrigerant inside and causes the gas refrigerant to flow out from the outlet. Therefore, the accumulator 5 includes a first load heat medium cooling refrigerant circulation circuit 601, a first load heat medium heating refrigerant circulation circuit 602, a second load heat medium heating refrigerant circulation circuit 603, and a cooling / heating simultaneous refrigerant circulation circuit 604. The surplus refrigerant generated by the difference in the amount of refrigerant used in each of the refrigerant circulation circuits, or the surplus refrigerant generated in the transitional period immediately after switching the refrigerant circulation circuit 600 is stored as a liquid refrigerant.

The closing device 6 opens and closes the heat source machine refrigerant pipe 110. By closing the heat source machine refrigerant pipe 110 by the closing device 6, the refrigerant existing inside the heat source machine 100 does not flow out of the heat source machine 100. The closing device 6 of the embodiment is composed of four stop valves, and each stop valve is referred to as a first stop valve 6a, a second stop valve 6b, a third stop valve 6c, and a fourth stop valve 6d. ..

The compressor shell temperature sensor 7 detects the temperature of the shell of the compressor 1. The compressor shell temperature sensor 7 of the embodiment is arranged on the shell surface of the compressor 1.

The discharge temperature sensor 8 detects the temperature of the refrigerant discharged from the compressor 1. The discharge temperature sensor 8 of the embodiment is arranged in the heat source machine refrigerant pipe 110 connected to the discharge port of the compressor 1.

The discharge pressure sensor 9 detects the pressure of the refrigerant discharged from the compressor 1. The discharge pressure sensor 9 of the embodiment is arranged in the heat source machine 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 deriving the condensation temperature of the refrigerant, and the discharge pressure sensor 9 has a role as a condensation temperature detecting means.

The heat source side heat exchanger temperature sensor 10 detects the temperature of the refrigerant flowing through the flow path formed in the heat source side heat exchanger 2. The heat source side heat exchanger temperature sensor 10 of the embodiment is arranged in the heat transfer tube or the heat radiation fin of the main heat exchanger of the heat source side heat exchanger 2.

The heat source heat medium temperature sensor 11 detects the temperature of the heat source heat medium. The heat source heat medium temperature sensor 11 of the embodiment is arranged at a position where air in the outdoor space before heat exchange is performed by the heat source side heat exchanger 2 passes through.

The heat source side liquid tube temperature sensor 12 detects the temperature of the liquid refrigerant flowing through the heat source side heat exchanger 2. The heat source side liquid tube temperature sensor 12 of the embodiment is arranged at the other end of the flow path formed in the main heat exchanger of the heat source side heat exchanger 2 or at the distributor.

The control device 13 controls to operate the refrigeration cycle device 1000. A detailed description of the control device 13 will be described later.

The heat source machine refrigerant pipe 110 is composed of a first heat source machine refrigerant pipe 111 to an eleventh heat source machine refrigerant pipe 121.

One end of the first heat source machine refrigerant pipe 111 is connected to the discharge port of the compressor 1, and the other end 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 arranged in the middle of the first heat source machine refrigerant pipe 111.

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

One end of the third heat source machine refrigerant pipe 113 is connected to the other end of the heat source side heat exchanger 2, and the other end is the third heat source machine refrigerant pipe 113 and the fourth heat source machine refrigerant pipe. It is connected to the branch of 114 and the fifth heat source machine refrigerant pipe 115. Further, the first expansion valve 3a is arranged in the middle of the third heat source machine refrigerant pipe 113.

One end of the fourth heat source machine refrigerant pipe 114 is connected to the branch of the third heat source machine refrigerant pipe 113, the fourth heat source machine refrigerant pipe 114, and the fifth heat source machine refrigerant pipe 115, and the other end. The portion is connected to the first connecting pipe 501. Further, a second expansion valve 3b and a first stop valve 6a are arranged in the middle of the fourth heat source machine refrigerant pipe 114, and the second expansion valve 3b is a fourth heat source machine rather than the first stop valve 6a. It is arranged on one end side of the refrigerant pipe 114.

One end of the fifth heat source machine refrigerant pipe 115 is connected to a branch between the third heat source machine refrigerant pipe 113, the fourth heat source machine refrigerant pipe 114, and the fifth heat source machine refrigerant pipe 115, and the other end. The portion is connected to the third connecting pipe 503. Further, a third expansion valve 3c and a second stop valve 6b are arranged in the middle of the fifth heat source machine refrigerant pipe 115, and the third expansion valve 3c is a fifth heat source machine rather than the second stop valve 6b. It is arranged on one end side of the refrigerant pipe 115.

One end of the sixth heat source machine refrigerant pipe 116 is connected to the second connecting pipe 502, and the other end is connected to the B port 4ab of the first four-way valve 4a. Further, a third stop valve 6c is arranged in the middle of the sixth heat source machine refrigerant pipe 116.

One end of the seventh heat source machine refrigerant pipe 117 is connected to the fourth connecting pipe 504, and the other end is connected to the D port 4ad of the first four-way valve 4a. Further, a fourth stop valve 6d is arranged in the middle of the seventh heat source machine refrigerant pipe 117.

One end of the eighth heat source machine refrigerant pipe 118 is connected to the A port 4aa of the first four-way valve 4a, and the other end is connected to the inflow port of the accumulator 5.

One end of the ninth heat source machine refrigerant pipe 119 is connected to the outlet of the accumulator 5, and the other end is connected to the suction port of the compressor 1.

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

One end of the eleventh heat source machine refrigerant pipe 121 is connected to the A port 4ba of the second four-way valve 4b, and the other end is connected in the middle of the eighth heat source machine refrigerant pipe 118.

Next, the first device used 200 will be described. The first utilization equipment 200 causes heat exchange between the first load heat medium passing through the first utilization equipment 200 and the refrigerant. In the embodiment, it is assumed that the first utilization device 200 is an indoor unit of an air conditioner, and the first load heat medium is the air in the 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, and a first utilization side liquid tube. It has a temperature sensor 24, a first user-side liquid refrigerant pipe 210, and a first user-side gas refrigerant pipe 220.

The first user-side heat exchanger 21 causes heat exchange between the refrigerant passing through the flow path formed in the first user-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. Further, the first utilization-side heat exchanger 21 of the embodiment has a fin-and-tube type, a first utilization-side heat exchanger main body in which a flow path through which a refrigerant flows is formed, a distributor, and a header. .. The other end of the distributor is connected to one end of the first user-side heat exchanger body, and the header is connected to the other end of the first user-side heat exchanger body. That is, in the embodiment, one end of the first utilization side heat exchanger 21 is one end of the distributor, and the other end is the header. Further, the air in the indoor space is blown to the first user side heat exchanger main body of the first user side heat exchanger 21 by a blower means such as a blower (not shown).

The first user-side heat exchanger temperature sensor 22 detects the temperature of the refrigerant flowing through the flow path formed in the first user-side heat exchanger 21. The first utilization side heat exchanger temperature sensor 22 of the embodiment is arranged in the heat transfer tube or the heat radiation fin of the first utilization side heat exchanger main body.

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 the air in the indoor space before the heat exchange is performed by the first user side heat exchanger 21 passes through. Placed in position.

The first user-side liquid tube temperature sensor 24 detects the temperature of the liquid refrigerant flowing into the first user-side heat exchanger 21. The first utilization side liquid pipe temperature sensor 24 of the embodiment is arranged in the middle of the first utilization side liquid refrigerant pipe 210 described later.

One end of the first user-side liquid refrigerant pipe 210 is connected to the first connecting pipe 501, and the other end is connected to one end of the first user-side heat exchanger 21.

One end of the first user-side gas refrigerant pipe 220 is connected to the other end of the first user-side heat exchanger 21, and the other end is connected to the second connecting pipe 502.

Next, the second device 300 will be described. The second utilization equipment 300 causes heat exchange between the second load heat medium passing through the second utilization equipment 300 and the refrigerant. In the embodiment, it is assumed that the second utilization equipment 300 is a heat source machine of the hot water supply device, and the second load heat medium passing through the second utilization equipment 300 is water. The second utilization device 300 includes a second utilization side heat exchanger 31, a second utilization side liquid tube temperature sensor 32, a second load heat medium inflow side temperature sensor 33, and a second load heat medium. Outflow side temperature sensor 34, second use side liquid refrigerant pipe 310, second use side gas refrigerant pipe 320, second load heat medium inflow side pipe 330, second load heat medium outflow side pipe It has 340 and.

In the second utilization side heat exchanger 31, a refrigerant flow path and a load heat medium flow path are formed, and between the refrigerant passing through the refrigerant flow path and the second load heat medium passing through the load heat medium flow path. Let the heat exchange be performed at. The second utilization side heat exchanger 31 of the embodiment causes heat exchange between water and the refrigerant. Further, 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 the thickness direction are stacked in the thickness direction.

The second user-side liquid tube temperature sensor 32 detects the temperature of the liquid refrigerant flowing into the second user-side heat exchanger 31. The second utilization side liquid pipe temperature sensor 32 of the embodiment is arranged in the middle of the second utilization side liquid refrigerant pipe 310 which will be described later.

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 arranged in the middle of the second load heat medium inflow side pipe 330 described later.

The second load heat medium outflow side temperature sensor 34 detects the temperature of the second load heat medium flowing out from the second user side heat exchanger 31. The second load heat medium outflow side temperature sensor 34 of the embodiment is arranged in the middle of the second load heat medium outflow side pipe 340 described later.

One end of the second utilization-side liquid refrigerant pipe 310 is connected to the third connecting pipe 503, and the other end is connected to one end of the refrigerant flow path of the second utilization-side heat exchanger 31. Will be done.

One end of the second utilization-side gas refrigerant pipe 320 is connected to the other end of the refrigerant flow path of the first utilization-side heat exchanger 21, and the other end is connected to the fourth connection pipe 504. Will be done.

One end of the second load heat medium inflow side pipe 330 is connected to a supply source of the second load heat medium (not shown), and the other end is the load heat of the second utilization side heat exchanger 31. It is connected to one end of the medium flow path. The supply source of the second load heat medium supplies the second load heat medium to the second utilization equipment 300. When the second load heat medium is water, a water source such as a water supply or a tank in which water is stored may be mentioned as a supply source of the second load heat medium.

One end of the second load heat medium outflow side pipe 340 is connected to the other end of the load heat medium flow path of the second utilization side heat exchanger 31, and the other end is not shown. Second load Connected to the terminal using the heat medium. The terminal for using the second load heat medium uses the second load heat medium heat exchanged by the second use device 300. When the second load heat medium is water, a faucet, a shower, a tank for storing heat exchanged water, or the like can be mentioned as a terminal for using the second load heat medium.

Next, the remote controller 400 will be described. The remote controller 400 is a device for the user to check or operate the state of the refrigeration cycle apparatus 1000. The remote controller 400 is connected to the control device 13 so that signals can be transmitted and received. The remote controller 400 of the embodiment includes a display unit and an operation unit (not shown). The display unit 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. Information related to the operation of the refrigerating cycle device 1000 is input to the operation unit by the user's operation. The display unit is realized by, for example, a liquid crystal display, and the operation unit is realized by a push button switch or the like. Further, the display unit and the operation unit may be integrated, such as by using a touch panel.

FIG. 2 is a hardware configuration diagram relating to 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. The control device 13 includes a processor 13a, a memory 13b, and a hardware interface 13c. The processor 13a, the memory 13b, and the hardware interface 13c are connected so that information can be exchanged.

The processor 13a is a device that controls components of the refrigeration cycle device 1000 such as the compressor 1 or executes data processing by executing a program stored in the memory 13b. For the processor 13a, for example, a CPU (Central Processing Unit) is used.

The memory 13b stores the program executed by the processor 13a and the data necessary for executing the program. Further, the memory 13b is used as a work area of the processor 13a. As the memory 13b, for example, a non-volatile or volatile semiconductor memory such as a RAM (Random Access Memory), a ROM (Read Only Memory), or a flash memory is used.

The hardware interface 13c transmits or receives signals and components included in the refrigeration cycle device 1000. The hardware interface 13c and the components that transmit or receive the signal are connected to the hardware interface 13c so that the signal can be transmitted or received by wire or wirelessly. For the hardware interface 13c, for example, a terminal block to which a signal line is connected, a GPIO (General Purpose Input / Output), or a transmitter / receiver for transmitting or receiving radio waves for wireless communication is used.

FIG. 3 is a functional block diagram relating to the refrigeration cycle apparatus according to the embodiment. Next, a functional block diagram of the refrigeration cycle apparatus 1000 will be described with reference to FIG.

The control device 13 includes a receiving unit 50, a transmitting unit 51, a storage unit 52, and a control unit 53. The receiving unit 50 and the transmitting unit 51 are realized by the hardware interface 43. Further, the storage unit 52 is realized by storing various information in the memory 42. Further, the control unit 53 is realized by the processor 41 performing processing according to the program stored in the memory 42.

The receiving unit 50 receives the signal transmitted to the control device 13. The receiving unit 50 includes 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 tube temperature sensor 12, and a first unit. User-side heat exchanger temperature sensor 22, first load heat medium temperature sensor 23, first user-side liquid tube temperature sensor 24, second user-side liquid tube temperature sensor 32, and second load heat medium inflow side temperature. The sensor 33, the second load heat medium outflow side temperature sensor 34, and the remote control 400 are connected. The receiving unit 50 receives a signal including information detected by each sensor or a signal including information related to the user's operation input from the operation unit of the remote controller 400.

As will be described later, the transmission unit 51 transmits a control signal generated by the control unit 53 or a signal including information regarding the operation of the refrigeration cycle device 1000 to an external component of the control device 13. A compressor 1, a heat source side heat exchanger 2, a pressure reducing device 3, a switching valve group 4, and a remote controller 400 are connected to the transmission unit 51. The compressor 1, the heat source side heat exchanger 2, the decompression device 3, and the switching valve group 4 operate in response to the control signal transmitted from the transmission unit 51. Further, the remote controller 400 receives a signal including information on the operation of the refrigeration cycle device 1000 transmitted from the transmission unit 51, and displays the information included in the signal on the display unit.

The storage unit 52 stores information necessary for the control unit 53 to generate a control signal.

The control unit 53 generates a control signal or a signal including information on the operation of the refrigeration cycle device 1000 based on the information included in the signal received by the reception unit 50 and the information stored in the storage unit 52.

FIG. 4 is a refrigerant circuit diagram during the first load heat medium cooling operation of the refrigeration cycle apparatus according to the embodiment. In FIG. 4, the flow path through which the refrigerant circulates is shown by a thick line. Next, the first load heat medium cooling operation of the refrigeration cycle apparatus 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. In the pressure reducing device 3 in the first load heat medium cooling refrigerant circulation circuit 601, the opening degree of the first expansion valve 3a is maximized, and the opening degree of the second expansion valve 3b passes through the second expansion valve 3b. The refrigerant has a predetermined opening degree for depressurizing, and the opening degree of the third expansion valve 3c is controlled to be minimized. Further, in the switching valve group 4 in the first load heat medium cooling refrigerant circulation circuit 601, the first four-way valve 4a communicates with the A port 4aa and the B port 4ab, and the C port 4ac and the D port 4ad communicate with each other. The second four-way valve 4b is controlled so that 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.

When the compressor 1 starts operation with the first load heat medium cooling refrigerant circulation circuit 601 formed, the refrigerant in a high temperature and high pressure gas state is discharged from the compressor 1. The high-temperature and high-pressure gas-state refrigerant discharged from the compressor 1 passes through the first heat source machine refrigerant pipe 111, the second four-way valve 4b, and the second heat source machine refrigerant pipe 112 to the heat source side heat exchanger 2. Inflow.

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 source side heat exchanger 2 is cooled by the air in the outdoor space. The cooled refrigerant becomes a high-pressure liquid-state refrigerant and flows out from the heat source side heat exchanger 2.

The refrigerant flowing out from the heat source side heat exchanger 2 passes through the third heat source machine refrigerant pipe 113. Further, although the first expansion valve 3a is provided in the middle of the third heat source machine refrigerant pipe 113, the opening of the first expansion valve 3a is the maximum, so that the first expansion valve 3a passes through the first expansion valve 3a. Refrigerant pressure does not decrease.

In the first load heat medium cooling refrigerant circulation circuit 601, the opening degree of the second expansion valve 3b is a predetermined opening degree at which the refrigerant passing through the second expansion valve 3b is depressurized, and the opening of the third expansion valve 3c. The degree is the minimum. Therefore, most of the refrigerant that has passed through the third heat source machine refrigerant pipe 113 flows into the fourth heat source machine refrigerant pipe 114, and leaks into the fifth heat source machine refrigerant pipe 115 from the third expansion valve 3c. A very small amount of refrigerant flows in. The refrigerant that has flowed into the fourth heat source machine refrigerant pipe 114 passes through the second expansion valve 3b. The refrigerant that has passed through the second expansion valve 3b is depressurized and changes from a high-pressure liquid state to a low-pressure gas-liquid two-phase state. It passes through the refrigerant pipe 210 and flows into the first utilization side heat exchanger 21.

In the first load heat medium cooling refrigerant circulation circuit 601 the first user 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 becomes a gas state and flows out from the first utilization side heat exchanger 21. Further, the first load heat medium is cooled by the refrigerant passing through the first utilization side heat exchanger 21. That is, in the embodiment, the air in the interior space is cooled by the refrigeration cycle device 1000.

The refrigerant flowing out from the first user-side heat exchanger 21 is the first user-side gas refrigerant pipe 220, the second connecting pipe 502, the sixth heat source machine refrigerant pipe 116, the first four-way valve 4a, and the eighth. It passes through the heat source machine refrigerant pipe 118, the accumulator 5, and the ninth heat source machine refrigerant pipe 119, and is sucked from the suction port of the compressor 1. The refrigerant sucked into the compressor 1 is discharged again in a high temperature and high pressure gas state.

Further, even if the refrigerant flowing out from the first user-side heat exchanger 21 is in a gas-liquid two-phase state, it passes through the accumulator 5 before being sucked into the compressor 1, so that the refrigerant is sucked into the compressor 1. Is a gas-state refrigerant. The accumulator 5 can suppress the failure of the compressor 1 due to the inflow of the liquid refrigerant into the compressor 1.

As described above, the refrigerant circulates in the first load heat medium cooling refrigerant circulation circuit 601 so that the first load heat medium can be cooled in the first load heat medium cooling operation. In the embodiment, since the first load heat medium is the air in the interior space, the first load heat medium cooling operation is a cooling operation for cooling the air in the interior space. Further, 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 to heat the parts constituting the heat source side heat exchanger 2. Therefore, the first load heat medium cooling operation is also a defrosting operation for melting the frost adhering to the heat source side heat exchanger 2.

Further, in a state where the flow path switching device forms the first load heat medium cooling refrigerant circulation circuit 601, the fifth heat source machine refrigerant pipe 115 includes the third connecting pipe 503 and the second utilization side liquid refrigerant pipe 310. It communicates with the refrigerant flow path of the second utilization side heat exchanger 31 through the pipe. Further, in a state where the flow path switching device forms the first load heat medium cooling refrigerant circulation circuit 601, the refrigerant flow paths of the second utilization side heat exchanger 31 are the second utilization side gas refrigerant pipe 320 and the second utilization side gas refrigerant pipe 320. Via the fourth connecting pipe 504, the seventh heat source machine refrigerant pipe 117, the first four-way valve 4a, the tenth heat source machine refrigerant pipe 120, the second four-way valve 4b, and the eleventh heat source machine refrigerant pipe 121. The eighth heat source machine refrigerant, which is a flow path between the evaporator (corresponding to the first user-side heat exchanger 21) in the first load heat medium cooling refrigerant circulation circuit 601 and the suction port of the compressor 1. It communicates with the pipe 118. As will be described later, in the second load heat medium heating refrigerant circulation circuit 603 and the cooling / heating simultaneous refrigerant circulation circuit 604 in which the refrigerant flows through the refrigerant flow path of the second utilization side heat exchanger 31, pressure loss when flowing through the piping, etc. The pressure of the flow path communicating from the fifth heat source machine refrigerant pipe 115 to the eleventh heat source machine refrigerant pipe 121 is higher than the pressure of the eighth heat source machine refrigerant pipe 118. Therefore, in a state where the flow path switching device forms the first load heat medium cooling refrigerant circulation circuit 601, the flow path communicating from the fifth heat source machine refrigerant pipe 115 to the eleventh heat source machine refrigerant pipe 121 Although not included in the first load heat medium cooling refrigerant circulation circuit 601, the refrigerant existing in the flow path communicating from the fifth heat source machine refrigerant pipe 115 to the eleventh heat source machine refrigerant pipe 121 is the eighth heat source. It flows into the machine refrigerant pipe 118 and joins the refrigerant circulating in the first load heat medium cooling refrigerant circulation circuit 601. Therefore, the refrigerant present in the second utilization side heat exchanger 31 when the second load heat medium heating refrigerant circulation circuit 603 and the cooling / heating simultaneous refrigerant circulation circuit 604 are switched to the first load heat medium cooling refrigerant circulation circuit 601. And the refrigerant leaked from the third expansion valve 3c to the fifth heat source machine refrigerant pipe 115 does not collect in the flow path communicating from the fifth heat source machine refrigerant pipe 115 to the eleventh heat source machine refrigerant pipe 121. , The first load heat medium cooling refrigerant circulation circuit 601 merges with the circulating refrigerant.

FIG. 5 is a refrigerant circuit diagram during the first load heat medium heating operation of the refrigeration cycle apparatus according to the embodiment. In FIG. 5, the flow path through which the refrigerant circulates is shown by a thick line. Next, the first load heat medium heating operation of the refrigeration cycle apparatus 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. In the pressure reducing device 3 in the first load heat medium heating refrigerant circulation circuit 602, the opening degree of the first expansion valve 3a becomes a predetermined opening degree at which the refrigerant passing through the first expansion valve 3a is depressurized. The opening degree of the expansion valve 3b is controlled to be the maximum, and the opening degree of the third expansion valve 3c is controlled to be the minimum. Further, in the switching valve group 4 in the first load heat medium heating refrigerant circulation circuit 602, the first four-way valve 4a communicates with the A port 4aa and the D port 4ad, and the B port 4ab and the C port 4ac communicate with each other. The second four-way valve 4b is controlled so that the A port 4ba and the D port 4bd communicate with each other and the B port 4bb and the C port 4bb communicate with each other.

When the compressor 1 starts operation with the first load heat medium heating refrigerant circulation circuit 602 formed, the refrigerant in a high temperature and high pressure gas state is discharged from the compressor 1. The high-temperature and high-pressure gas-state refrigerant discharged from the compressor 1 is the first heat source machine refrigerant pipe 111, the second four-way valve 4b, the tenth heat source machine refrigerant pipe 120, the first four-way valve 4a, and the sixth. It passes through the heat source machine refrigerant pipe 116, the second connecting pipe 502, and the first user-side gas refrigerant pipe 220, and flows into the first user-side heat exchanger 21.

In the first load heat medium heating refrigerant circulation circuit 602, the first user-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-state refrigerant and flows out from the first utilization-side heat exchanger 21. Further, the first load heat medium is heated by the refrigerant passing through the first utilization side heat exchanger 21. That is, in the embodiment, the air in the interior space is heated by the refrigeration cycle device 1000.

The refrigerant flowing out of the first user-side heat exchanger 21 passes through the first user-side liquid refrigerant pipe 210, the first connecting pipe 501, and the fourth heat source machine refrigerant pipe 114. Further, although the second expansion valve 3b is provided in the middle of the fourth heat source machine refrigerant pipe 114, the opening of the second expansion valve 3b is the maximum, so that the second expansion valve 3b passes through the second expansion valve 3b. Refrigerant pressure does not decrease.

In the first load heat medium heating refrigerant circulation circuit 602, the opening degree of the first expansion valve 3a is a predetermined opening degree at which the refrigerant passing through the first expansion valve 3a is depressurized, and the opening of the third expansion valve 3c. The degree is the minimum. Therefore, most of the refrigerant that has passed through the fourth heat source machine refrigerant pipe 114 flows into the third heat source machine refrigerant pipe 113, and leaks into the fifth heat source machine refrigerant pipe 115 from the third expansion valve 3c. A very small amount of refrigerant flows in. The refrigerant flowing into the third heat source machine refrigerant pipe 113 passes through the first expansion valve 3a. The refrigerant that has passed through the first expansion valve 3a is depressurized to change from a high-pressure liquid state to a low-pressure gas-liquid two-phase state, passes through the third heat source machine refrigerant pipe 113, and flows into the heat source side heat exchanger 2.

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 source side heat exchanger 2 is heated by the air in the outdoor space. The heated refrigerant becomes a gas state and flows out from the heat source side heat exchanger 2.

The refrigerant flowing out from the heat source side heat exchanger 2 is the second heat source machine refrigerant pipe 112, the second four-way valve 4b, the eleventh heat source machine refrigerant pipe 121, the eighth heat source machine refrigerant pipe 118, the accumulator 5, and the first. It passes through the heat source machine refrigerant pipe 119 and is sucked from the suction port of the compressor 1. The refrigerant sucked into the compressor 1 is discharged again in a high temperature and high pressure gas state.

As described above, the refrigerant circulates in the first load heat medium heating refrigerant circulation circuit 602, so that the first load heat medium can be heated in the first load heat medium heating operation. In the embodiment, since the first load heat medium is the air in the interior space, the first load heat medium heating operation is a heating operation for heating the air in the interior space.

Further, in a state where the flow path switching device forms the first load heat medium heating refrigerant circulation circuit 602, the fifth heat source machine refrigerant pipe 115 includes the third connecting pipe 503 and the second utilization side liquid refrigerant pipe 310. It communicates with the refrigerant flow path of the second utilization side heat exchanger 31 through the pipe. Further, in a state where the flow path switching device forms the first load heat medium heating refrigerant circulation circuit 602, the refrigerant flow paths of the second utilization side heat exchanger 31 are the second utilization side gas refrigerant pipe 320 and the second utilization side gas refrigerant pipe 320. Evaporator in the first load heat medium heating refrigerant circulation circuit 602 (corresponding to the heat source side heat exchanger 2) via the fourth connecting pipe 504, the seventh heat source machine refrigerant pipe 117, and the first four-way valve 4a. It communicates with the eighth heat source machine refrigerant pipe 118, which is a flow path between the compressor 1 and the suction port of the compressor 1. As will be described later, in the second load heat medium heating refrigerant circulation circuit 603 and the cooling / heating simultaneous refrigerant circulation circuit 604 in which the refrigerant flows through the refrigerant flow path of the second utilization side heat exchanger 31, pressure loss when flowing through the piping, etc. The pressure of the flow path communicating from the fifth heat source machine refrigerant pipe 115 to the first four-way valve 4a is higher than the pressure of the eighth heat source machine refrigerant pipe 118. Therefore, in a state where the flow path switching device forms the first load heat medium heating refrigerant circulation circuit 602, the flow path communicating from the fifth heat source machine refrigerant pipe 115 to the first four-way valve 4a is the first load. Although not included in the heat medium heating refrigerant circulation circuit 602, the refrigerant existing in the flow path communicating from the fifth heat source machine refrigerant pipe 115 to the first four-way valve 4a flows into the eighth heat source machine refrigerant pipe 118, and the first It merges with the refrigerant circulating in the load heat medium heating refrigerant circulation circuit 602. Therefore, the refrigerant present in the second utilization side heat exchanger 31 when the second load heat medium heating refrigerant circulation circuit 603 and the cooling / heating simultaneous refrigerant circulation circuit 604 are switched to the first load heat medium heating refrigerant circulation circuit 602. The refrigerant leaking from the third expansion valve 3c to the fifth heat source machine refrigerant pipe 115 does not accumulate in the flow path communicating from the fifth heat source machine refrigerant pipe 115 to the first four-way valve 4a, and the first It merges with the refrigerant circulating in the load heat medium heating refrigerant circulation circuit 602.

FIG. 6 is a refrigerant circuit diagram during a second load heat medium heating operation of the refrigeration cycle apparatus according to the embodiment. In FIG. 6, the flow path through which the refrigerant circulates is shown by a thick line. Next, the second load heat medium heating operation of the refrigeration cycle apparatus 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. In the pressure reducing device 3 in the second load heat medium heating refrigerant circulation circuit 603, the opening degree of the first expansion valve 3a becomes a predetermined opening degree at which the refrigerant passing through the first expansion valve 3a is depressurized. The opening degree of the expansion valve 3b is controlled to be the minimum, and the opening degree of the third expansion valve 3c is controlled to be the maximum. Further, in the switching valve group 4 in the second load heat medium heating refrigerant circulation circuit 603, the first four-way valve 4a communicates with the A port 4aa and the B port 4ab, and the C port 4ac and the D port 4ad communicate with each other. The second four-way valve 4b is controlled so that the A port 4ba and the D port 4bd communicate with each other and the B port 4bb and the C port 4bb communicate with each other. Further, during the second load heat medium heating operation, the second load heat medium passes from the second load heat medium inflow side pipe 330 to the load heat medium flow path of the second utilization side heat exchanger 31 and is second. It is assumed that the load flows to the heat medium outflow side pipe 340.

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

In the second load heat medium heating refrigerant circulation circuit 603, the second user 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-state refrigerant and flows out from the refrigerant flow path of the second utilization-side heat exchanger 31. Further, 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 flowing into the load heat medium flow path of the second utilization side heat exchanger 31 is heated by the refrigeration cycle device 1000.

The refrigerant flowing out of the second user-side heat exchanger 31 passes through the second user-side liquid refrigerant pipe 310, the third connecting pipe 503, and the fifth heat source machine refrigerant pipe 115. Further, although the third expansion valve 3c is provided in the middle of the fifth heat source machine refrigerant pipe 115, the opening of the third expansion valve 3c is the maximum, so that the third expansion valve 3c passes through the third expansion valve 3c. Refrigerant pressure does not decrease.

In the second load heat medium heating refrigerant circulation circuit 603, the opening degree of the first expansion valve 3a is a predetermined opening degree at which the refrigerant passing through the first expansion valve 3a is depressurized, and the second expansion valve 3b is opened. The degree is the minimum. Therefore, most of the refrigerant that has passed through the fifth heat source machine refrigerant pipe 115 flows into the third heat source machine refrigerant pipe 113, and leaks into the fourth heat source machine refrigerant pipe 114 from the second expansion valve 3b. A very small amount of refrigerant flows in. The refrigerant flowing into the third heat source machine refrigerant pipe 113 passes through the first expansion valve 3a. The refrigerant that has passed through the first expansion valve 3a is depressurized to change from a high-pressure liquid state to a low-pressure gas-liquid two-phase state, passes through the third heat source machine refrigerant pipe 113, and flows into the heat source side heat exchanger 2.

As described above, the refrigerant circulates in the second load heat medium heating refrigerant circulation circuit 603, so that the second load heat medium can be heated in the second load heat medium heating operation. 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 generate hot water.

Further, in a state where the flow path switching device forms the second load heat medium heating refrigerant circulation circuit 603, the fourth heat source machine refrigerant pipe 114 has the first connecting pipe 501 and the first utilization side liquid refrigerant pipe 210. It communicates with the first user-side heat exchanger 21 via. Further, in a state where the flow path switching device forms the second load heat medium heating refrigerant circulation circuit 603, the refrigerant flow paths of the first utilization side heat exchanger 21 are the first utilization side gas refrigerant pipe 220 and the second. Evaporator in the second load heat medium heating refrigerant circulation circuit 603 via the second connecting pipe 502, the sixth heat source machine refrigerant pipe 116, and the first four-way valve 4a (corresponding to the heat source side heat exchanger 2). It communicates with the eighth heat source machine refrigerant pipe 118, which is a flow path between the compressor 1 and the suction port of the compressor 1. In the first load heat medium cooling refrigerant circulation circuit 601 through which the refrigerant flows through the first utilization side heat exchanger 21, the first load heat medium heating refrigerant circulation circuit 602, and the cooling heating simultaneous refrigerant circulation circuit 604 described later, piping is provided. Due to factors such as pressure loss during flow, the pressure in the flow path communicating from the fourth heat source machine refrigerant pipe 114 to the first four-way valve 4a is higher than the pressure in the eighth heat source machine refrigerant pipe 118. Therefore, in a state where the flow path switching device forms the second load heat medium heating refrigerant circulation circuit 603, the flow path communicating from the fourth heat source machine refrigerant pipe 114 to the first four-way valve 4a is the second load. Although not included in the heat medium heating refrigerant circulation circuit 603, the refrigerant existing in the flow path communicating from the fourth heat source machine refrigerant pipe 114 to the first four-way valve 4a flows into the eighth heat source machine refrigerant pipe 118, and the second It merges with the refrigerant circulating in the 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 / heating simultaneous refrigerant circulation circuit 604 are switched to the second load heat medium heating refrigerant circulation circuit 603, the first load heat medium cooling refrigerant circulation circuit 601 is switched to. The refrigerant existing in the first utilization side heat exchanger 21 and the refrigerant leaking from the second expansion valve 3b to the fourth heat source machine refrigerant pipe 114 are the first four-way valve 4a from the fourth heat source machine refrigerant pipe 114. It does not accumulate in the flow path that communicates with the second load heat medium heating refrigerant circulation circuit 603 and joins the circulating refrigerant.

FIG. 7 is a refrigerant circuit diagram during simultaneous cooling and heating operation of the refrigeration cycle device according to the embodiment. In FIG. 7, the flow path through which the refrigerant circulates is shown by a thick line. Next, the simultaneous cooling and heating operation of the refrigeration cycle device 1000 will be described. In the simultaneous cooling and heating 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. In the pressure reducing device 3 in the cooling / heating simultaneous refrigerant circulation circuit 604, the opening degree of the first expansion valve 3a is minimized, and the opening degree of the second expansion valve 3b is reduced by the refrigerant passing through the second expansion valve 3b. The opening degree becomes a predetermined value, and the opening degree of the third expansion valve 3c is controlled to be maximized. Further, in the switching valve group 4 in the cooling / heating simultaneous refrigerant circulation circuit 604, the first four-way valve 4a communicates with the A port 4aa and the B port 4ab, and the C port 4ac and the D port 4ad communicate with each other. The valve 4b is controlled so that the A port 4ba and the D port 4bd communicate with each other and the B port 4bb and the C port 4bb communicate with each other. Further, during the simultaneous cooling and heating operation, the second load heat medium passes from the second load heat medium inflow side pipe 330 to the load heat medium flow path of the second utilization side heat exchanger 31, and the second load heat medium. It is assumed that the flow flows to the outflow side pipe 340.

When the compressor 1 starts operation with the cooling / heating simultaneous refrigerant circulation circuit 604 formed, the refrigerant in a high temperature and high pressure gas state is discharged from the compressor 1. The high-temperature and high-pressure gas-state refrigerant discharged from the compressor 1 is the first heat source machine refrigerant pipe 111, the second four-way valve 4b, the tenth heat source machine refrigerant pipe 120, the first four-way valve 4a, and the seventh. It passes through the heat source machine refrigerant pipe 117, the fourth connecting pipe 504, and the second user-side gas refrigerant pipe 320, and flows into the refrigerant flow path of the second user-side heat exchanger 31.

In the cooling / heating simultaneous refrigerant circulation circuit 604, the second user-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-state refrigerant and flows out from the refrigerant flow path of the second utilization-side heat exchanger 31. Further, 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 flowing into the load heat medium flow path of the second utilization side heat exchanger 31 is heated by the refrigeration cycle device 1000.

In the cooling / heating simultaneous refrigerant circulation circuit 604, the opening degree of the first expansion valve 3a is the minimum, and the opening degree of the second expansion valve 3b is a predetermined opening degree at which the refrigerant passing through the second expansion valve 3b is depressurized. be. Therefore, most of the refrigerant that has passed through the fifth heat source machine refrigerant pipe 115 flows into the fourth heat source machine refrigerant pipe 114, and leaks into the third heat source machine refrigerant pipe 113 from the first expansion valve 3a. A very small amount of refrigerant flows in. The refrigerant that has flowed into the fourth heat source machine refrigerant pipe 114 passes through the second expansion valve 3b. The refrigerant that has passed through the second expansion valve 3b is depressurized and changes from a high-pressure liquid state to a low-pressure gas-liquid two-phase state. It passes through the refrigerant pipe 210 and flows into the first utilization side heat exchanger 21.

In the cooling / heating simultaneous refrigerant circulation circuit 604, the first user-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 becomes a gas state and flows out from the first utilization side heat exchanger 21. Further, the first load heat medium is cooled by the refrigerant passing through the first utilization side heat exchanger 21. That is, in the embodiment, the air in the interior space is cooled by the refrigeration cycle device 1000.

As described above, the refrigerant circulates in the cooling / heating simultaneous refrigerant circulation circuit 604, so that the first load heat medium can be cooled and the second load heat medium can be heated at the same time in the cooling / heating simultaneous refrigerant operation. 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 simultaneous cooling and heating operation cools the air in the indoor space and heats the water to generate hot water. It is a simultaneous operation of cooling and hot water supply.

Further, in a state where the flow path switching device forms the cooling / heating simultaneous refrigerant circulation circuit 604, the third heat source machine refrigerant pipe 113 communicates with the heat source side heat exchanger 2. Further, in a state where the flow path switching device forms the cooling / heating simultaneous refrigerant circulation circuit 604, the heat source side heat exchanger 2 is the second heat source machine refrigerant pipe 112, the second four-way valve 4b, and the eleventh heat source machine. Eighth heat source, which is a flow path between the evaporator (corresponding to the first heat exchanger 21 on the user side) in the cooling / heating simultaneous refrigerant circulation circuit 604 and the suction port of the compressor 1 via the refrigerant pipe 121. It communicates with the machine refrigerant pipe 118. In the first load heat medium cooling refrigerant circulation circuit 601 where the refrigerant flows through the heat source side heat exchanger 2, the first load heat medium heating refrigerant circulation circuit 602 and the second load heat medium heating refrigerant circulation circuit 603 flow through the pipes. Due to factors such as pressure loss, the pressure in the flow path communicating from the third heat source machine refrigerant pipe 113 to the eleventh heat source machine refrigerant pipe 121 is higher than the pressure in the eighth heat source machine refrigerant pipe 118. Therefore, in a state where the flow path switching device forms the cooling / heating simultaneous refrigerant circulation circuit 604, the flow path communicating from the third heat source machine refrigerant pipe 113 to the eleventh heat source machine refrigerant pipe 121 is cooled / heated simultaneous refrigerant circulation. Although not included in the circuit 604, the refrigerant existing in the flow path communicating from the third heat source machine refrigerant pipe 113 to the eleventh heat source machine refrigerant pipe 121 flows into the eighth heat source machine refrigerant pipe 118 to cool and heat the simultaneous refrigerant. It merges with the refrigerant circulating in the 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 / heating simultaneous refrigerant circulation circuit 604, the heat source is used. The refrigerant existing in the side heat exchanger 2 and the refrigerant leaking from the first expansion valve 3a to the third heat source machine refrigerant pipe 113 are the third heat source machine refrigerant pipe 113 to the eleventh heat source machine refrigerant pipe 121. It does not accumulate in the flow path that communicates with the refrigerant, but merges with the refrigerant that circulates in the cooling / heating simultaneous refrigerant circulation circuit 604.

As described above, in the refrigeration cycle apparatus 1000 according to the embodiment, the compressor 1 that sucks the refrigerant from the suction port, compresses the sucked refrigerant, and discharges the compressed refrigerant from the discharge port, the refrigerant, and the first heat medium ( The first heat exchanger (corresponding to heat source side heat exchanger 2) and the refrigerant and the second heat medium (corresponding to the first load heat medium) that exchange heat with the heat source heat medium (corresponding to) Between the second heat exchanger (corresponding to the first user-side heat exchanger 21) and the refrigerant and the third heat medium (corresponding to the second load heat medium) to exchange heat with each other. A third heat exchanger (corresponding to the second user-side heat exchanger 31) for heat exchange and a flow path switching device (pressure reducing device 3 and switching valve group 4) for switching the refrigerant circulation circuit in which the refrigerant circulates. The flow path switching device is a first refrigerant circulation circuit (second), which is a refrigerant circulation circuit including a third heat exchanger in which the third heat exchanger functions as an evaporator or a condenser. (Applicable to the load heat medium heating refrigerant circulation circuit 603 or the cooling and heating simultaneous refrigerant circulation circuit 604), and the first heat exchanger or the second heat exchanger including the first heat exchanger and the second heat exchanger. A second refrigerant circulation circuit (first load heat medium cooling refrigerant circulation circuit 601 or first load heat medium heating) which is a refrigerant circulation circuit in which any one of the above functions as an evaporator and does not include a third heat exchanger. The third heat exchanger functions as the evaporator of the second refrigerant circulation circuit when the second refrigerant circulation circuit is formed by the flow path switching device by switching between (corresponding to the refrigerant circulation circuit 602). Heat exchanger or second heat exchanger (when the second refrigerant circulation circuit is the first load heat medium cooling refrigerant circulation circuit 601 the first user side heat exchanger 21 corresponds, and the second refrigerant When the circulation circuit is the first load heat medium heating refrigerant circulation circuit 602, the heat source side heat exchanger 2 is applicable) and the flow path between the suction port of the compressor 1 is communicated with each other. In this configuration, especially when the second refrigerant circulation circuit is formed, the third heat exchanger is between the heat exchanger functioning as the evaporator of the second refrigerant circulation circuit and the suction port of the compressor 1. In the refrigerating cycle apparatus 1000 according to the embodiment, the refrigerant accumulated in the heat exchanger not included in the refrigerant circulation circuit flows between the evaporator and the suction port of the compressor by having a configuration communicating with the flow path of the above. It has the effect of suppressing a shortage of refrigerant by flowing into the road and merging with the refrigerant circulating in the refrigerant circulation circuit.

Further, in the configuration of the refrigeration cycle apparatus 1000 according to the above-described embodiment, the first heat exchanger corresponds to the heat source side heat exchanger 2 and the second heat exchanger is the first user side heat exchanger 21. It was explained that the third heat exchanger corresponds to the second user side heat exchanger 31, but it is not limited to this, and the first to the first as in the first case and the second case below. The case where the third heat exchanger corresponds to each heat exchanger of the refrigeration cycle apparatus 1000 is also included in one aspect of the present disclosure. In the first case, the first heat exchanger corresponds to the first user-side heat exchanger 21, the second heat exchanger corresponds to the second user-side heat exchanger 31, and the third heat. The 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 and the first load heat medium heating refrigerant circulation circuit 602 or the second load heat medium heating refrigerant circulation circuit 603. The second refrigerant circulation circuit corresponds to the cooling / heating simultaneous refrigerant circulation circuit 604. In the second case, the first heat exchanger is the heat source side heat exchanger 2, the second heat exchanger is the second utilization side heat exchanger 31, and the third heat exchanger is the first. Corresponds to the user 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 and the first load heat medium heating refrigerant circulation circuit 602 or the cooling heating simultaneous refrigerant circulation circuit 604. The second load heat medium heating refrigerant circulation circuit 603 corresponds to the refrigerant circulation circuit. Further, in both the first case and the second case, in the refrigerating cycle apparatus 1000 according to the embodiment, the refrigerant accumulated in the heat exchanger not included in the refrigerant circulation circuit is collected in the suction ports of the evaporator and the compressor. It flows into the flow path between them and merges with the refrigerant circulating in the refrigerant circulation circuit, which has the effect of suppressing a refrigerant shortage.

Further, in the refrigeration cycle apparatus 1000 according to the embodiment, as an additional configuration, in the flow path switching apparatus, the second utilization side heat exchanger 31 functions as a condenser, and the first utilization side heat exchanger 21 evaporates. The refrigerant that functions as a container and has passed through the first user-side heat exchanger 21 can be switched to the cooling / heating simultaneous refrigerant circulation circuit 604 that is sucked from the suction port of the compressor 1, and the cooling / heating simultaneous refrigerant is switched by the flow path switching device. When the circulation circuit 604 is formed, the heat source side heat exchanger 2 is not included in the cooling / heating simultaneous refrigerant circulation circuit 604, and is not included in the cooling / heating simultaneous refrigerant circulation circuit 604. It has a structure that communicates with the flow path between and. In the additional configuration, when the flow path switching device forms the cooling / heating simultaneous refrigerant circulation circuit 604, the heat source side heat exchanger 2 is the first utilization side heat exchanger 21 and the suction port of the compressor 1. In the refrigeration cycle apparatus 1000 according to the embodiment, the refrigerant accumulated in the heat source side heat exchanger 2 not included in the cooling / heating simultaneous refrigerant circulation circuit 604 is the first to have a configuration communicating with the flow path between the two. It flows into the flow path between the heat exchanger 21 on the user side and the suction port of the compressor 1 and merges with the refrigerant circulating in the cooling / heating simultaneous refrigerant circulation circuit 604, which has the effect of suppressing the shortage of the refrigerant.

Further, in the refrigeration cycle device 1000 according to the embodiment, as an additional configuration, in the flow path switching device, the heat source side heat exchanger 2 functions as a condenser and the first user side heat exchanger 21 functions as an evaporator. The refrigerant that has passed through the first utilization-side heat exchanger 21 can be switched to the first load heat medium cooling refrigerant circulation circuit 601 that is sucked from the suction port of the compressor 1, and is the first by the flow path switching device. When the load heat medium cooling refrigerant circulation circuit 601 is formed, the second utilization side heat exchanger 31 is not included in the first load heat medium cooling refrigerant circulation circuit 601 and is not included in the first load heat medium cooling refrigerant circulation circuit 601. It has a configuration that communicates with a flow path between the first utilization side heat exchanger 21 of 601 and the suction port of the compressor 1. Among the additional configurations, when the flow path switching device forms the first load heat medium cooling refrigerant circulation circuit 601, the second utilization side heat exchanger 31 is the first utilization side heat exchanger 21. The refrigerating cycle apparatus 1000 according to the embodiment is not included in the first load heat medium cooling refrigerant circulation circuit 601 by having a configuration communicating with the flow path between the compressor 1 and the suction port of the compressor 1. The refrigerant accumulated in the user-side heat exchanger 31 flows into the flow path between the first user-side heat exchanger 21 and the suction port of the compressor 1 and circulates in the first load heat medium cooling refrigerant circulation circuit 601. It has the effect of merging with the refrigerant and suppressing the shortage of the refrigerant.

Further, as an additional configuration, the refrigerating cycle device 1000 according to the embodiment includes a flow path switching device including two four-

way valves

4a and 4b and three

expansion valves

3a, 3b and 3c. When the first load heat medium heating refrigerant circulation circuit 602 is formed, the refrigerant is the discharge port of the compressor 1, the first heat exchanger 21 on the utilization side, and at least one of the three expansion valves (expansion valve). 3a and 3b are applicable), the heat source side heat exchanger 2 and the suction port of the compressor 1 circulate in this order, and one of the three expansion valves (corresponding to the expansion valve 3c) is the discharge port of the compressor 1 and the first. The flow path between the second utilization side heat exchanger 31 is blocked, 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 is at least one of the discharge port of the compressor 1, the second heat exchanger 31 on the utilization side, and the three expansion valves. One (corresponding to

expansion valves

3a and 3c), the heat source side heat exchanger 2 and the suction port of the compressor 1 circulate in this order, and one of the three expansion valves (corresponding to the expansion valve 3b) is the compressor 1. The flow path between the discharge port and the first utilization side heat exchanger 21 is blocked, and the first utilization side heat exchanger 21 is the flow path between the heat source side heat exchanger 2 and the suction port of the compressor 1. When the cooling and heating simultaneous refrigerant circulation circuit 604 is formed by the flow path switching device, the refrigerant is at least one of the discharge port of the compressor 1, the second heat exchanger 31 on the user side, and the three expansion valves. One (corresponding to

expansion valves

3b and 3c), the first heat exchanger 21 on the user side, and the suction port of the compressor 1 circulate in this order, and one of the three expansion valves (expansion valve 3a) is the compressor 1. The flow path between the discharge port and the heat source side heat exchanger 2 is blocked, 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. When the first load heat medium cooling refrigerant circulation circuit 601 is formed by the flow path switching device, the refrigerant is at least one of the discharge port of the compressor 1, the heat exchanger 2 on the heat source side, and three expansion valves. (Applicable to

expansion valves

3a and 3b), the first heat exchanger 21 on the user side, and the suction port of the compressor 1 circulate in this order, and one of the three expansion valves (corresponding to the expansion valve 3c) is the compressor. The flow path between the discharge port 1 and the second utilization side heat exchanger 31 is blocked, and the second utilization side heat exchanger 31 has the first utilization side heat exchanger 21 and the suction port of the compressor 1. It has a structure that communicates with the flow path between them. By having the additional configuration, the refrigerating cycle apparatus 1000 according to the embodiment has a first load heat medium cooling refrigerant circulation circuit 601, a first load heat medium heating refrigerant circulation circuit 602, and a second load heat. When the medium heating refrigerant circulation circuit 603 and the cooling / heating simultaneous refrigerant circulation circuit 604 are formed, the refrigerant accumulated in the heat exchanger not included in each refrigerant circulation circuit merges with the refrigerant circulating in the refrigerant circulation circuit, and the refrigerant It has the effect of obtaining a configuration that can suppress the shortage.

Further, in the refrigeration cycle device 1000 according to the embodiment, as an additional configuration, the flow path switching device has a four-way valve (corresponding to the second four-way valve 4b), and the four-way valve has a second load heat. When the medium heating refrigerant circulation circuit 603 is formed, the discharge port of the compressor 1 and the second utilization side heat exchanger 31 are communicated with each other, and the heat source side heat exchanger 2 and the suction port of the compressor 1 are connected. When the first load heat medium cooling refrigerant circulation circuit 601 is formed, the discharge port of the compressor 1 and the heat source side heat exchanger 2 are connected to connect the second utilization side heat exchanger 31 and the first load. It has a configuration in which the flow path between the first utilization side heat exchanger 21 of the heat medium cooling refrigerant circulation circuit 601 and the suction port of the compressor is connected. In the refrigeration cycle apparatus of Patent Document 1, frost may adhere to the outdoor heat exchanger when the hot water supply operation is performed. At this time, in order to melt the frost adhering to the outdoor heat exchanger, it is conceivable to switch to the cooling operation refrigerant circulation circuit in which the outdoor heat exchanger functions as a condenser to perform the defrosting operation to melt the frost. In the refrigerant circulation circuit of Patent Document 1, the temperature of the hot water supply heat exchanger is higher when comparing the temperature of the hot water supply heat exchanger and the temperature of the outdoor heat exchanger immediately after switching from the hot water supply operation to the cooling operation refrigerant circulation circuit. .. Moreover, temperature and pressure are in a proportional relationship. Therefore, the pressure inside the hot water supply heat exchanger and the pressure inside the outdoor heat exchanger immediately after switching from the hot water supply operation to the cooling refrigerant circulation circuit are higher than the pressure inside the hot water supply heat exchanger. Further, a normal solenoid valve has a needle and a pedestal, and moves the needle closer to the pedestal to block the flow path, and moves the needle away from the pedestal to open the flow path. In a normal electromagnetic valve, an opening on the high pressure side and an opening on the low pressure side are set so that pressure is applied in the direction in which the needle presses the pedestal, and the second electromagnetic valve of Patent Document 1 is an opening communicating with the discharge port of the compressor. Is connected so that the opening on the high pressure side becomes the opening on the low pressure side and the opening communicating with the hot water supply heat exchanger becomes the opening on the low pressure side. However, immediately after switching from the hot water supply operation to the cooling operation refrigerant circulation circuit, the pressure inside the hot water supply heat exchanger is higher than the pressure inside the outdoor heat exchanger, so the opening on the low pressure side of the second electromagnetic valve is high pressure. The pressure is higher than that of the opening on the side, and a back pressure is generated in the second electromagnetic valve. When a back pressure is generated in the solenoid valve, pressure is applied inside the solenoid valve in a direction in which the needle moves away from the pedestal, and the needle rises and falls and collides with the pedestal to generate chattering noise. Therefore, in Patent Document 1, a chattering sound is generated immediately after switching from the hot water supply operation to the cooling operation refrigerant circulation circuit. However, in the refrigeration cycle apparatus 1000 of the embodiment, immediately after switching from the second load heat medium heating refrigerant circulation circuit 603 to the first load heat medium cooling refrigerant circulation circuit 601 by providing the additional configuration. However, it does not have a valve that causes back pressure, and no chattering noise is generated.

In the refrigeration cycle apparatus 1000 according to 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 cooling The four types of refrigerant circulation circuits of the simultaneous heating refrigerant circulation circuit 604 can be switched, but the refrigerating cycle device is not limited to the first refrigerant circulation circuit including the heat exchanger corresponding to the third heat exchanger. It is only necessary to be able to switch between the refrigerant circulation circuit corresponding to the above and the refrigerant circulation circuit corresponding to the second refrigerant circulation circuit not including the heat exchanger corresponding to the third heat exchanger. For example, the memory 13b of the control device 13 is necessary for processing a program and 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. Data is stored, and it is not necessary to store the program for switching to the state of forming the first load heat medium cooling refrigerant circulation circuit 601 and the cooling / heating simultaneous refrigerant circulation circuit 604, and the data necessary for processing the program. ..

Further, in the refrigeration cycle device 1000 according to the embodiment, since the second utilization device 300 is a water supply machine, the flow path switching device does not switch to the refrigerant circulation circuit for cooling the second heat medium. Not limited to this, the refrigeration cycle device may be switched to a refrigerant circulation circuit for cooling the second heat medium. For example, in the refrigeration cycle device, the second utilization device is used as a cooler of a constant temperature water tank for storing low temperature water inside, the heat source side heat exchanger 2 functions as a condenser, and the second utilization side heat exchanger 31 is used. A refrigerant circulation circuit that functions as an evaporator or a refrigerant circulation circuit that causes the first user-side heat exchanger 21 to function as a condenser and the second user-side heat exchanger 31 to function as an evaporator may be formed. In the case of the former refrigerant circulation circuit, the opening degree of the first expansion valve 3a becomes the maximum, the opening degree of the second expansion valve 3b becomes the minimum, and the opening degree of the third expansion valve 3c becomes the third. The refrigerant that has passed through the expansion valve 3c of No. 1 has a predetermined opening for depressurizing, the first four-way valve 4a communicates with the A port 4aa and the B port 4ab, and the C port 4ac and the D port 4ad communicate with each other. The four-way valve 4b is controlled so that 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, in the latter case of the refrigerant circulation circuit, the opening degree of the first expansion valve 3a is minimized, the opening degree of the second expansion valve 3b is maximized, and the opening degree of the third expansion valve 3c is the third. The refrigerant that has passed through the expansion valve 3c of No. 1 has a predetermined opening for depressurizing, the first four-way valve 4a communicates with the A port 4aa and the D port 4ad, and the B port 4ab and the C port 4ac communicate with each other. The four-way valve 4b is controlled so that the A port 4ba and the D port 4bd communicate with each other and the B port 4bb and the C port 4bb communicate with each other. Further, both the former refrigerant circulation circuit and the latter refrigerant circulation circuit correspond to a heat exchanger not included in the refrigerant circulation circuit (in the case of the former refrigerant circulation circuit, the first user-side heat exchanger 21 corresponds to the latter. In the case of the refrigerant circulation circuit of the above, the heat source side heat exchanger 2 corresponds), the heat exchanger functioning as the evaporator of the refrigerant circulation circuit (both correspond to the second user side heat exchanger 31) and the compressor 1. Since it is connected to the flow path between the suction port and the refrigerating cycle device in which the former refrigerant circulation circuit and the latter refrigerant circulation circuit are formed, it is possible to obtain a configuration capable of suppressing a refrigerant shortage. Play.

FIG. 8 is a refrigerant circuit diagram of the refrigeration cycle device according to the first modification of the embodiment. Next, a modified example of the embodiment will be described. Compared with the refrigerating cycle apparatus 1000 of the embodiment, the refrigerating cycle apparatus 1001 according to the first modification of the embodiment has two instead of the third expansion valve 3c in the middle of the fifth heat source machine refrigerant pipe 115. The difference is that the square valve 15 is provided. Since the refrigerant circuit of the refrigerating cycle device 1001 according to the first modification of the embodiment is the same as the refrigerant circuit of the refrigerating cycle device 1000 of the embodiment except for the above-mentioned differences, the same part will be described. Is omitted.

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

The refrigerating cycle apparatus 1001 according to the first modification of the embodiment has the same as the refrigerating cycle apparatus 1000 according to the embodiment, the first load heat medium cooling refrigerant circulation circuit 601 and the first load heat medium heating refrigerant circulation. The circuit 602, the second load heat medium heating refrigerant circulation circuit 603, and the cooling / heating simultaneous refrigerant circulation circuit 604 can be formed. In the first load heat medium cooling refrigerant circulation circuit 601, the opening degree of the first expansion valve 3a becomes maximum, and the opening degree of the second expansion valve 3b reduces the pressure of the refrigerant passing through the second expansion valve 3b. A predetermined opening degree is reached, and the two-way valve 15 is controlled so as to block the flow path. In the first load heat medium heating refrigerant circulation circuit 602, the opening degree of the first expansion valve 3a becomes a predetermined opening degree at which the refrigerant passing through the first expansion valve 3a is depressurized, and the opening degree of the second expansion valve 3b is set to a predetermined opening degree. The opening degree is maximized, and the two-way valve 15 is controlled to block the flow path. In the second load heat medium heating refrigerant circulation circuit 603, the opening degree of the first expansion valve 3a becomes a predetermined opening degree at which the refrigerant passing through the first expansion valve 3a is depressurized, and the opening degree of the second expansion valve 3b is increased. The opening degree is minimized and the two-way valve 15 is controlled to open the flow path. In the cooling / heating simultaneous refrigerant circulation circuit 604, the opening degree of the first expansion valve 3a is minimized, and the opening degree of the second expansion valve 3b is a predetermined opening degree at which the refrigerant passing through the second expansion valve 3b is depressurized. , And the two-way valve 15 is controlled to open the flow path.

Even if the two-way valve 15 is provided instead of the third expansion valve 3c as in the refrigerating cycle apparatus 1001 according to the first modification of the embodiment, the refrigerating cycle apparatus 1000 according to the embodiment is the same as the refrigerating cycle apparatus 1000. One load heat medium cooling refrigerant circulation circuit 601, a first load heat medium heating refrigerant circulation circuit 602, a second load heat medium heating refrigerant circulation circuit 603, and a cooling / heating simultaneous refrigerant circulation circuit 604 can be formed. It has the same effect.

Further, even when the two-way valve 15 is provided in place of the first expansion valve 3a or the two-way valve 15 is provided in place of the second expansion valve 3b, the refrigeration cycle apparatus 1000 according to the embodiment is provided. Similarly, 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 / heating simultaneous refrigerant circulation circuit 604 are formed. It can have the same effect.

That is, as an additional configuration, as in the refrigeration cycle device 1001 according to the first modification of the embodiment, the flow path switching device includes two four-way valves (four-

way valves

4a and 4b) and two expansion valves (expansion). When a first load heat medium heating refrigerant circulation circuit 602 is formed by a flow path switching

device including valves

3a, 3b, 3c) and a two-way valve 15, the refrigerant is a compressor. 1 discharge port, 1st utilization side heat exchanger 21, at least one of two expansion valves, heat source side heat exchanger 2, suction port of compressor 1 circulate in this order, and two-

way valve

15 or 2 One of the two expansion valves blocks 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 is a heat source side heat exchanger. When a second load heat medium heating refrigerant circulation circuit 603 is formed by a flow path switching device that communicates with the flow path between 2 and the suction port of the compressor 1, the refrigerant is the discharge port of the compressor 1, the first. (2) Heat exchanger 31 on the user side, at least one of the two expansion valves, heat exchanger 2 on the heat source side, and the suction port of the compressor 1 circulate in this order, and either the two-way valve 15 or the two expansion valves. One is to block 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 is the heat source side heat exchanger 2 and the compressor 1. When a cooling / heating simultaneous refrigerant circulation circuit 604 is formed by a flow path switching device that communicates with the flow path between the suction port, the refrigerant is the discharge port of the compressor 1, the

second heat exchanger

31, 2 on the user side. At least one of the two expansion valves, the first heat exchanger 21 on the user side, and the suction port of the compressor 1 circulate in this order, and one of the two-way valve or the two expansion valves discharges from the compressor 1. The flow path between the outlet and the heat source side heat exchanger 2 is blocked, 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. When the first load heat medium cooling refrigerant circulation circuit 601 is formed by the flow path switching device, the refrigerant is at least one of the discharge port of the compressor 1, the heat source side heat exchanger 2, and the two expansion valves. , The first utilization side heat exchanger 21 and the suction port of the compressor 1 circulate in this order, and one of the two-way valve 15 or the two expansion valves is the discharge port of the compressor 1 and the second utilization side heat. The flow path between the exchanger 31 is blocked, 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. Even if it has, it has the following effects. That is, by having the additional configuration, 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 cooling heating are provided. When the simultaneous refrigerant circulation circuit 604 is formed, the refrigerant accumulated in the heat exchanger not included in each refrigerant circulation circuit merges with the refrigerant circulating in the refrigerant circulation circuit, and the refrigerant shortage can be suppressed. It produces the effects that can be obtained.

FIG. 9 is a refrigerant circuit diagram of the refrigeration cycle device according to the second modification of the embodiment. The refrigerating cycle apparatus 1002 according to the second modification of the embodiment does not have the second four-way valve 4b as compared with the refrigerating cycle apparatus 1000 of the embodiment, and the first heat source machine refrigerant pipe 111 And the tenth heat source machine refrigerant pipe 120 communicate with each other, and the first heat source machine refrigerant pipe 111 and the tenth heat source machine refrigerant pipe 120 communicate with each other. Since the refrigerant circuit of the refrigerating cycle device 1002 according to the second modification of the embodiment is the same as the refrigerant circuit of the refrigerating cycle device 1000 of the embodiment except for the above-mentioned differences, the same part will be described. Is omitted.

The refrigerating cycle apparatus 1002 according to the second modification of the embodiment cannot form the first load heat medium cooling refrigerant circulation circuit 601 but is the same as the refrigerating cycle apparatus 1000 according to the embodiment. The load heat medium heating refrigerant circulation circuit 602, the second load heat medium heating refrigerant circulation circuit 603, and the cooling / heating simultaneous refrigerant circulation circuit 604 can be formed. Therefore, similarly to the refrigerating cycle device 1000 of the embodiment, the refrigerating cycle device 1002 according to the second modification of the embodiment has the first load heat medium heating refrigerant circulation circuit 602 and the second load heat medium heating. When the refrigerant circulation circuit 603 and the cooling / heating simultaneous refrigerant circulation circuit 604 are formed, the refrigerant accumulated in the heat exchanger not included in each refrigerant circulation circuit merges with the refrigerant circulating in the refrigerant circulation circuit to reduce the refrigerant shortage. It has an effect that can be suppressed.

Further, similarly to the refrigeration cycle device 1001 according to the first modification of the embodiment, the refrigeration cycle device 1002 according to the second modification of the embodiment also has the first expansion valve 3a and the second expansion valve. Even if any one of 3b and the third expansion valve 3c is replaced with the two-way valve 15, 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 A circulation circuit 604 can be formed.

That is, as an additional configuration, the flow path switching device includes a four-way valve 4a, two expansion valves, and a two-way valve, as in the refrigeration cycle device 1002 according to the second modification of the embodiment. When the first load heat medium heating refrigerant circulation circuit 602 is formed by the switching device, the refrigerant is at least one of the discharge port of the compressor 1, the first heat exchanger 21 on the user side, and two expansion valves. , The heat source side heat exchanger 2 and the suction port of the compressor 1 circulate in this order, and one of the two-way valve 15 or the two expansion valves is the discharge port of the compressor 1 and the second utilization side heat exchanger 31. 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 by blocking the flow path between the two, and is seconded by the flow path switching device. When the load heat medium heating refrigerant circulation circuit 603 is formed, the refrigerant is the discharge port of the compressor 1, the second utilization side heat exchanger 31, at least one of the two expansion valves, and the heat source side heat exchanger. 2. Circulating in the order of the suction port of the compressor 1, one of the two-way valve 15 or the two expansion valves is a flow path between the discharge port of the compressor 1 and the first heat exchanger 21 on the utilization side. 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 the cooling and heating simultaneous refrigerant circulation circuit 604 is provided by the flow path switching device. When formed, the refrigerant is the discharge port of the compressor 1, the second heat exchanger 31 on the user side, at least one of the two expansion valves, the heat exchanger 21 on the first user side, and the suction of the compressor 1. Circulating in the order of the ports, either one of the two-way valve or the two expansion valves blocks 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 blocks the flow path. The following effects are obtained even when the heat exchanger 21 on the first user side and the suction port of the compressor 1 are configured to communicate with each other. That is, by having the 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 / heating simultaneous refrigerant circulation circuit 604 are formed, respectively. The refrigerant accumulated in the heat exchanger, which is not included in the refrigerant circulation circuit of the above, merges with the refrigerant circulating in the refrigerant circulation circuit, and has an effect of obtaining a configuration capable of suppressing a refrigerant shortage.

FIG. 10 is a refrigerant circuit diagram of the refrigeration cycle device according to the third modification of the embodiment. The refrigerating cycle apparatus 1003 according to the third modification of the embodiment does not have the second four-way valve 4b as compared with the refrigerating cycle apparatus 1000 of the embodiment, and the first heat source machine refrigerant pipe 111 And the tenth heat source machine refrigerant pipe 120 communicate with each other, the first heat source machine refrigerant pipe 111 and the tenth heat source machine refrigerant pipe 120 communicate with each other, and a two-way valve instead of the second expansion valve 3b. The difference is that 16 is provided and a two-way valve 17 is provided instead of the third expansion valve 3c. Since the refrigerant circuit of the refrigerating cycle device 1003 according to the third modification of the embodiment is the same as the refrigerant circuit of the refrigerating cycle device 1000 of the embodiment except for the above-mentioned differences, the same part will be described. Is omitted. Further, since the two-

way valves

16 and 17 are the same as the two-way valves 15 described in the first modification of the embodiment, the description thereof will be omitted.

The refrigerating cycle apparatus 1003 according to the third modification of the embodiment cannot form the first load heat medium cooling refrigerant circulation circuit 601 and the cooling / heating simultaneous refrigerant circulation circuit 604, but the refrigerating according to the embodiment. Similar to the cycle device 1000, the first load heat medium heating refrigerant circulation circuit 602 and the second load heat medium heating refrigerant circulation circuit 603 can be formed. In the first load heat medium heating refrigerant circulation circuit 602, the opening degree of the first expansion valve 3a becomes a predetermined opening degree at which the refrigerant passing through the first expansion valve 3a is depressurized, and the two-way valve 16 is a flow path. Is opened, and the two-way valve 17 is controlled to block the flow path. In the second load heat medium heating refrigerant circulation circuit 603, the two-way valve 16 is controlled to block the flow path, and the two-way valve 17 is controlled to open the flow path. Therefore, similarly to the refrigerating cycle device 1000 of the embodiment, the refrigerating cycle device 1003 according to the third modification of the embodiment has the first load heat medium heating refrigerant circulation circuit 602 and the second load heat medium heating. When the refrigerant circulation circuit 603 is formed, the refrigerant accumulated in the heat exchanger not included in each refrigerant circulation circuit merges with the refrigerant circulating in the refrigerant circulation circuit, and has an effect of suppressing the refrigerant shortage. ..

That is, as in the refrigeration cycle device 1003 according to the third modification of the embodiment, as an additional configuration, an expansion valve 3a for reducing the pressure of the refrigerant is provided, and the flow path switching device is a four-way valve 4a and two two-way. When the first load heat medium heating refrigerant circulation circuit 602 is formed by the flow path switching

device including valves

16 and 17, the refrigerant is the discharge port of the compressor 1, the first utilization side heat exchanger 21, and the like. The expansion valve 3a, the heat source side heat exchanger 2, and the suction port of the compressor 1 circulate in this order, and the two-way valve 17 passes through the flow path between the discharge port of the compressor 1 and the second utilization side heat exchanger 31. Closed, 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 the second load heat medium heating refrigerant circulation is performed by the flow path switching device. When the circuit 603 is formed, the refrigerant circulates in the order of the discharge port of the compressor 1, the second heat exchanger 31 on the user side, the expansion valve 3a, the heat exchanger 2 on the heat source side, and the suction port of the compressor 1. The square 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 is the heat source side heat exchanger 2 and the compressor 1. Even if it has a structure that communicates with the flow path between the suction port and the suction port, the following effects are obtained. That is, by having the 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, they are not included in the respective refrigerant circulation circuits. The refrigerant accumulated in the heat exchanger merges with the refrigerant circulating in the refrigerant circulation circuit, which has the effect of obtaining a configuration capable of suppressing a refrigerant shortage.

FIG. 11 is a refrigerant circuit diagram of the refrigeration cycle device according to the fourth modification of the embodiment. The refrigerating cycle apparatus 1003 according to the fourth modification of the embodiment does not have the second four-way valve 4b as compared with the refrigerating cycle apparatus 1000 of the embodiment, and the first heat source machine refrigerant pipe 111 And the tenth heat source machine refrigerant pipe 120 communicate with each other, and the first heat source machine refrigerant pipe 111 and the tenth heat source machine refrigerant pipe 120 communicate with each other, and the first expansion valve 3a is not provided. .. Since the refrigerant circuit of the refrigerating cycle device 1004 according to the fourth modification of the embodiment is the same as the refrigerant circuit of the refrigerating cycle device 1000 of the embodiment except for the above-mentioned differences, the same part will be described. Is omitted.

The refrigerating cycle apparatus 1004 according to the fourth modification of the embodiment cannot form the first load heat medium cooling refrigerant circulation circuit 601 and the cooling / heating simultaneous refrigerant circulation circuit 604, but the refrigerating according to the embodiment. Similar to the cycle device 1000, the first load heat medium heating refrigerant circulation circuit 602 and the second load heat medium heating refrigerant circulation circuit 603 can be formed. In the first load heat medium heating refrigerant circulation circuit 602, the opening degree of the second expansion valve 3b becomes a predetermined opening degree at which the refrigerant passing through the second expansion valve 3b is depressurized, and the third expansion valve 3c has an opening degree. It is controlled so that the opening degree is minimized. In the second load heat medium heating refrigerant circulation circuit 603, the opening degree of the second expansion valve 3b is minimized, and the opening degree of the third expansion valve 3c reduces the pressure of the refrigerant passing through the third expansion valve 3c. It is controlled to have a predetermined opening. Therefore, similarly to the refrigerating cycle device 1000 of the embodiment, the refrigerating cycle device 1004 according to the fourth modification of the embodiment has the first load heat medium heating refrigerant circulation circuit 602 and the second load heat medium heating. When the refrigerant circulation circuit 603 is formed, the refrigerant accumulated in the heat exchanger not included in each refrigerant circulation circuit merges with the refrigerant circulating in the refrigerant circulation circuit, and has an effect of suppressing the refrigerant shortage. ..

That is, as an additional configuration, as in the refrigeration cycle device 1003 according to the third modification of the embodiment, the flow path switching device includes a four-way valve 4a and a first expansion valve (second expansion valve 3b). When the first load heat medium heating refrigerant circulation circuit 602 is formed by the flow path switching device, the refrigerant is a compressor. The discharge port of No. 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 circulate in this order, and the second expansion valve is the discharge port of the compressor 1. The flow path between the heat exchanger 31 and the second utilization side heat exchanger 31 is blocked, and the second utilization side heat exchanger 31 is 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 communication and flow path switching device, the refrigerant is the discharge port of the compressor 1, the second utilization side heat exchanger 31, the second expansion valve, and the like. The heat source side heat exchanger 2 and the suction port of the compressor 1 circulate in this order, and the first expansion valve blocks the flow path between the discharge port of the compressor 1 and the first utilization side heat exchanger 21. The first utilization-side heat exchanger 21 has the following effects even when it has a configuration in which it communicates with the flow path between the heat source-side heat exchanger 2 and the suction port of the compressor 1. That is, by having the 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, they are not included in the respective refrigerant circulation circuits. The refrigerant accumulated in the heat exchanger merges with the refrigerant circulating in the refrigerant circulation circuit, which has the effect of obtaining a configuration capable of suppressing a refrigerant shortage.

1 Compressor, 2 Heat source side heat exchanger, 3 Decompression device, 3a 1st expansion valve, 3b 2nd expansion valve, 3c 3rd expansion valve, 4 switching valve group, 4a 1st four-way valve, 4b first Two 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, 11 Heat source heat medium temperature sensor, 12 Heat source side liquid tube temperature sensor, 13 Control device, 13a processor, 13b memory, 13c hardware interface, 15-17 Square valve, 21 first user side heat exchanger, 22 first user side heat exchanger temperature sensor, 23 first load heat medium temperature sensor, 24 first user side liquid tube temperature sensor, 31 second User side heat exchanger, 32 Second user side liquid tube temperature sensor, 33 Second load heat medium inflow side temperature sensor, 34 Second load heat medium outflow side temperature sensor, 50 Receiver, 51 Transmitter, 52 Storage unit, 53 control unit, 100 heat source machine, 110 heat source machine refrigerant pipe, 111 first heat source machine refrigerant pipe, 112 second heat source machine refrigerant pipe, 113 third heat source machine refrigerant pipe, 114 fourth heat source machine Refrigerator pipe, 115 5th heat source machine refrigerant pipe, 116 6th heat source machine refrigerant pipe, 117 7th heat source machine refrigerant pipe, 118 8th heat source machine refrigerant pipe, 119 9th heat source machine refrigerant pipe, 120th Ten heat source machine refrigerant pipes, 121 eleventh heat source machine refrigerant pipes, 200 first use equipment, 210 first use side liquid refrigerant pipes, 220 first use side gas refrigerant pipes, 300 second use equipment , 310 second user side liquid refrigerant pipe, 320 second user side gas refrigerant pipe, 330 second load heat medium inflow side pipe 340 second load heat medium outflow side pipe, 400 remote control, 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, 1000-1004 Refrigeration cycle device.

Claims

A compressor that sucks the refrigerant from the suction port, compresses the sucked refrigerant, and discharges the compressed refrigerant from the discharge port.
A first heat exchanger that exchanges heat between the refrigerant and the first heat medium,
A second heat exchanger that exchanges heat between the refrigerant and the second heat medium,
A third heat exchanger that exchanges heat between the refrigerant and the third heat medium,
A flow path switching device for switching the refrigerant circulation circuit through which the refrigerant circulates is provided.
The flow path switching device is
A first refrigerant circulation circuit that includes the third heat exchanger and is a refrigerant circulation circuit in which the third heat exchanger functions as an evaporator or a condenser.
The first heat exchanger and the second heat exchanger are included, and any one of the first heat exchanger or the second heat exchanger functions as an evaporator, and the third heat exchange. The second refrigerant circulation circuit, which is the refrigerant circulation circuit that does not include a vessel,
To switch,
When the second refrigerant circulation circuit is formed by the flow path switching device, the third heat exchanger is the first heat exchanger or the first heat exchanger that functions as an evaporator of the second refrigerant circulation circuit. A refrigeration cycle device communicating with a flow path between the second heat exchanger and the suction port of the compressor.
The first heat medium is a heat source heat medium, the second heat medium is a first load heat medium, and the third heat medium is a second load heat medium.
The first heat exchanger is a heat source side heat exchanger, the second heat exchanger is a first user side heat exchanger, and the third heat exchanger is a second user side heat exchange. The refrigerating cycle apparatus according to claim 1, which is a vessel.
The first refrigerant circulation circuit includes the heat source side heat exchanger, does not include the first utilization side heat exchanger, and the second utilization side heat exchanger or the heat source side heat exchanger is an evaporator. Acts as
When the first refrigerant circulation circuit is formed by the flow path switching device, the first utilization-side heat exchanger is a heat exchanger that functions as an evaporator of the first refrigerant circulation circuit and the compressor. The refrigeration cycle apparatus according to claim 2, wherein the refrigerating cycle device communicates with the flow path between the suction port and the suction port.
In the first refrigerant circulation circuit, the second utilization side heat exchanger functions as a condenser, the heat source side heat exchanger functions as an evaporator, and the refrigerant that has passed through the heat source side heat exchanger is said. It is a second load heat medium heating refrigerant circulation circuit sucked from the suction port of the compressor.
In the second refrigerant circulation circuit, the first utilization side heat exchanger functions as a condenser, the heat source side heat exchanger functions as an evaporator, and the refrigerant that has passed through the heat source side heat exchanger is said. The refrigerating cycle apparatus according to claim 3, which is a first load heat medium heating refrigerant circulation circuit sucked from the suction port of the compressor.
The flow path switching device is composed of a four-way valve, a first expansion valve, and a second expansion valve.
When the first load heat medium heating refrigerant circulation circuit is formed by the flow path switching device, the refrigerant is the discharge port of the compressor, the first utilization side heat exchanger, and the first expansion. The valve, the heat source side heat exchanger, and the suction port of the compressor circulate in this order, and the second expansion valve is a flow path between the discharge port of the compressor and the second utilization side heat exchanger. The second utilization side heat exchanger communicates with the flow path between the heat source side heat exchanger and the suction port of the compressor.
When the second load heat medium heating refrigerant circulation circuit is formed by the flow path switching device, the refrigerant is the discharge port of the compressor, the second utilization side heat exchanger, and the second expansion. The valve, the heat source side heat exchanger, and the suction port of the compressor circulate in this order, and the first expansion valve is a flow path between the discharge port of the compressor and the first utilization side heat exchanger. 4. The refrigeration cycle apparatus according to claim 4, wherein the first utilization side heat exchanger communicates with a flow path between the heat source side heat exchanger and the suction port of the compressor.
An expansion valve for reducing the pressure of the refrigerant is provided.
The flow path switching device is composed of a four-way valve, a first two-way valve, and a second two-way valve.
When the first load heat medium heating refrigerant circulation circuit is formed by the flow path switching device, the refrigerant is the discharge port of the compressor, the first utilization side heat exchanger, the expansion valve, and the above. It circulates in the order of the heat source side heat exchanger and the suction port of the compressor, and the second two-way valve blocks the flow path between the discharge port of the compressor and the second user side heat exchanger. Then, the second utilization-side heat exchanger communicates with the flow path between the heat source-side heat exchanger and the suction port of the compressor.
When the second load heat medium heating refrigerant circulation circuit is formed by the flow path switching device, the refrigerant is the discharge port of the compressor, the second utilization side heat exchanger, the expansion valve, and the above. It circulates in the order of the heat source side heat exchanger and the suction port of the compressor, and the first two-way valve blocks the flow path between the discharge port of the compressor and the first user side heat exchanger. The refrigeration cycle device according to claim 4, wherein the first utilization-side heat exchanger communicates with a flow path between the heat source-side heat exchanger and the suction port of the compressor.
The first refrigerant circulation circuit includes the first utilization side heat exchanger and does not include the heat source side heat exchanger, and the second utilization side heat exchanger or the first utilization side heat exchanger. Acts as an evaporator,
When the first refrigerant circulation circuit is formed by the flow path switching device, the heat source side heat exchanger is a heat exchanger that functions as an evaporator of the first refrigerant circulation circuit and the suction of the compressor. The refrigerating cycle apparatus according to claim 2, which communicates with a flow path between the mouth and the mouth.
In the first refrigerant circulation circuit, the second utilization side heat exchanger functions as a condenser, the first utilization side heat exchanger functions as an evaporator, and the first utilization side heat exchanger functions. It is a cooling / heating simultaneous refrigerant circulation circuit in which the refrigerant that has passed through is sucked from the suction port of the compressor.
In the second refrigerant circulation circuit, the first utilization side heat exchanger functions as a condenser, the heat source side heat exchanger functions as an evaporator, and the refrigerant that has passed through the heat source side heat exchanger is said. The refrigerating cycle apparatus according to claim 7, which is a first load heat medium heating refrigerant circulation circuit sucked from the suction port of the compressor.
The flow path switching device includes a four-way valve, two expansion valves, and a two-way valve.
When the first load heat medium heating refrigerant circulation circuit is formed by the flow path switching device, the refrigerant is the discharge port of the compressor, the first utilization side heat exchanger, and the two expansion valves. At least one of the two-way valve or the two expansion valves circulates in the order of the heat source side heat exchanger and the suction port of the compressor, and any one of the two-way valve or the two expansion valves is the discharge port of the compressor and the suction port. The flow path between the second utilization side heat exchanger is blocked, and the second utilization side heat exchanger communicates with the flow path between the heat source side heat exchanger and the suction port of the compressor. death,
When the cooling / heating simultaneous refrigerant circulation circuit is formed by the flow path switching device, the refrigerant is at least one of the discharge port of the compressor, the second utilization side heat exchanger, and the two expansion valves. One, the first utilization side heat exchanger and the suction port of the compressor circulate in this order, and either one of the two-way valve or the two expansion valves is the discharge port of the compressor and the heat source. The eighth aspect of claim 8, wherein the flow path between the side heat exchanger is blocked and the heat source side heat exchanger communicates with the flow path between the heat source side heat exchanger and the suction port of the compressor. Refrigeration cycle equipment.
In the flow path switching device, the heat source side heat exchanger functions as a condenser, the first utilization side heat exchanger functions as an evaporator, and the refrigerant that has passed through the first utilization side heat exchanger functions as the compressor. The first load heat medium cooling refrigerant circulation circuit sucked from the suction port and the first utilization side heat exchanger function as a condenser, and the heat source side heat exchanger functions as an evaporator and the heat source side. The first load heat medium heating refrigerant circulation circuit in which the refrigerant that has passed through the heat exchanger is sucked from the suction port of the compressor and the second utilization side heat exchanger function as a condenser to heat the heat source side. The exchanger functions as an evaporator, and the second load heat medium heating refrigerant circulation circuit in which the refrigerant that has passed through the heat source side heat exchanger is sucked from the suction port of the compressor and the second user side heat exchange. The device functions as a condenser, the first user-side heat exchanger functions as an evaporator, and the refrigerant that has passed through the first user-side heat exchanger is sucked from the suction port of the compressor at the same time as cooling and heating. Switching between the refrigerant circulation circuit and
The first refrigerant circulation circuit is the second load heat medium heating refrigerant circulation circuit or the cooling / heating simultaneous refrigerant circulation circuit.
The refrigerating cycle apparatus according to claim 2, wherein the second refrigerant circulation circuit is the first load heat medium cooling refrigerant circulation circuit or the first load heat medium heating refrigerant circulation circuit.
The flow path switching device includes two four-way valves, two expansion valves, and a two-way valve.
When the first load heat medium heating refrigerant circulation circuit is formed by the flow path switching device, the refrigerant is the discharge port of the compressor, the first utilization side heat exchanger, and the two expansion valves. At least one of the two-way valve or the two expansion valves circulates in the order of the heat source side heat exchanger and the suction port of the compressor, and any one of the two-way valve or the two expansion valves is the discharge port of the compressor and the suction port. The flow path between the second utilization side heat exchanger is blocked, and the second utilization side heat exchanger communicates with the flow path between the heat source side heat exchanger and the suction port of the compressor. death,
When the second load heat medium heating refrigerant circulation circuit is formed by the flow path switching device, the refrigerant is the discharge port of the compressor, the second utilization side heat exchanger, and the two expansion valves. At least one of the two-way valve or the two expansion valves circulates in the order of the heat source side heat exchanger and the suction port of the compressor, and any one of the two-way valve or the two expansion valves is the discharge port of the compressor and the suction port. The flow path between the first utilization side heat exchanger is blocked, and the first utilization side heat exchanger communicates with the flow path between the heat source side heat exchanger and the suction port of the compressor. death,
When the first load heat medium cooling refrigerant circulation circuit is formed by the flow path switching device, the refrigerant is at least one of the discharge port of the compressor, the heat source side heat exchanger, and the two expansion valves. One, the first utilization side heat exchanger, and the suction port of the compressor circulate in this order, and either one of the two-way valve or the two expansion valves is the discharge port of the compressor and the said. The flow path between the second utilization side heat exchanger is blocked, and the second utilization side heat exchanger is a flow between the first utilization side heat exchanger and the suction port of the compressor. Communicate with the road,
When the cooling / heating simultaneous refrigerant circulation circuit is formed by the flow path switching device, the refrigerant is at least one of the discharge port of the compressor, the second utilization side heat exchanger, and the two expansion valves. One, the first utilization side heat exchanger and the suction port of the compressor circulate in this order, and either one of the two-way valve or the two expansion valves is the discharge port of the compressor and the heat source. 10. Claim 10 that blocks the flow path between the side heat exchanger and the heat source side heat exchanger communicates with the flow path between the first utilization side heat exchanger and the suction port of the compressor. The refrigeration cycle device described in.
The first heat medium is a first load heat medium, the second heat medium is a second load heat medium, and the third heat medium is a heat source heat medium.
The first heat exchanger is a first user-side heat exchanger, the second heat exchanger is a second user-side heat exchanger, and the third heat exchanger is a heat source-side exchanger. The refrigeration cycle apparatus according to claim 1.
The first heat medium is a heat source heat medium, the second heat medium is a second load heat medium, and the third heat medium is a first load heat medium.
The first heat exchanger is a heat source side heat exchanger, the second heat exchanger is a second utilization side heat exchanger, and the third heat exchanger is a first utilization side heat exchange. The refrigerating cycle apparatus according to claim 1, which is a vessel.
The heat source heat medium is air in the outdoor space.
The first load heat medium is the air in the indoor space.
The refrigeration cycle apparatus according to any one of claims 2 to 13, wherein the second load heat medium is water.