JP7378685B1 - Refrigeration cycle equipment - Google Patents

Abstract

A refrigeration cycle device according to the present disclosure includes a heat medium circuit in which a heat medium circulates. The heat medium circuit includes a plurality of load-side heat exchangers that exchange heat between a first refrigerant and the heat medium, and a plurality of load-side heat exchangers into which the heat medium supplied from at least one of the load-side heat exchangers flows. It is equipped with a user-side heat exchanger and a pump. One of the load-side heat exchangers is a first load-side heat exchanger, and among the load-side heat exchangers, the heat medium has a temperature different from that of the heat medium supplied by the first load-side heat exchanger. One of the load-side heat exchangers that supplies the heat medium is referred to as a second load-side heat exchanger. In this case, the heat medium circuit is configured to supply the heat medium to the first load-side heat exchanger and the second load-side heat exchanger using one pump.

Description

The present disclosure relates to a refrigeration cycle device.

Some conventional refrigeration cycle devices include a plurality of load-side heat exchangers that exchange heat between a first refrigerant and a heat medium different from the first refrigerant. In addition, such conventional refrigeration cycle equipment includes at least two load-side heat exchangers that supply heat medium at different temperatures, and allows the heat medium at different temperatures to flow into separate user-side heat exchangers. has also been proposed (for example, see Patent Document 1). The user-side heat exchanger is a heat exchanger that cools or heats the room when the refrigeration cycle device is used as an air conditioner. Hereinafter, one of the plurality of load-side heat exchangers that supply heat medium at different temperatures will be referred to as a first load-side heat exchanger. Furthermore, among the plurality of load-side heat exchangers that supply heat medium at different temperatures, one of the load-side heat exchangers that supplies a heat medium at a different temperature from the heat medium supplied by the first load-side heat exchanger. One is called the second load-side heat exchanger.

International Publication No. 2011/080802

In a conventional refrigeration cycle device, which is equipped with at least two load-side heat exchangers that supply heat carriers of different temperatures, and in which the heat carriers of different temperatures can flow into separate user-side heat exchangers, the heat that the heat carrier circulates is The medium circuit was equipped with a pump that supplies the heat medium to the first load-side heat exchanger and a pump that supplies the heat medium to the second load-side heat exchanger. In other words, in the heat medium circuit of such a conventional refrigeration cycle device, it was necessary to supply the heat medium to the first load-side heat exchanger and the second load-side heat exchanger using separate pumps, respectively. Here, the pump that supplies the heat medium to the load-side heat exchanger is expensive. Furthermore, as the number of pumps that supply heat medium to the load-side heat exchanger increases, the probability that the pumps will fail also increases. For this reason, conventional refrigeration cycle equipment that is equipped with at least two load-side heat exchangers that supply heat carriers of different temperatures and in which the heat carriers of different temperatures can flow into separate user-side heat exchangers increases manufacturing costs. However, there was a problem that reliability decreased.

The present disclosure is intended to solve the above-mentioned problems, and includes at least two load-side heat exchangers that supply heat mediums of different temperatures, and each heat medium of different temperatures is connected to a separate user-side heat exchanger. It is an object of the present invention to obtain a refrigeration cycle device that can be used in a refrigeration cycle system, which can reduce manufacturing costs and improve reliability compared to conventional ones.

The refrigeration cycle device according to the present disclosure includes a plurality of load-side heat exchangers that exchange heat between a first refrigerant and a heat medium different from the first refrigerant, and a supply from at least one of the load-side heat exchangers. a plurality of user-side heat exchangers into which the heat medium flows, and a heat medium circuit through which the heat medium circulates, and one of the load-side heat exchangers is connected to a first load-side heat exchanger. an exchanger, one of the user-side heat exchangers into which the heat medium supplied from the first load-side heat exchanger flows is a first user-side heat exchanger, and among the load-side heat exchangers, One of the load-side heat exchangers that supplies the heat medium at a temperature different from that of the heat medium supplied by the first load-side heat exchanger is a second load-side heat exchanger, and the first use Among the user-side heat exchangers other than the side heat exchanger, the heat medium that is supplied from the second load-side heat exchanger and has a different temperature from the heat medium that is supplied to the first user-side heat exchanger flows in. When one of the user-side heat exchangers is a second user-side heat exchanger, the heat medium circuit is configured to transfer the heat medium flowing out from the first user-side heat exchanger and the second user-side heat exchanger. A merging section for merging the heat medium flowing out from the exchanger, and a first heat medium pipe through which the heat medium flowing out from the merging section flows, and a second heat medium connected to the first load-side heat exchanger. a branching section that branches into a pipe and a third heat medium pipe connected to the second load-side heat exchanger, and connects the first load-side heat exchanger and the second load-side heat exchanger in parallel; A pump is provided between the merging part and the branching part, and sucking the heat medium that has joined at the merging part, and discharging it toward the branching part to circulate the heat medium.

The heat medium circuit of the refrigeration cycle device according to the present disclosure can supply the heat medium to the first load-side heat exchanger and the second load-side heat exchanger with one pump. Therefore, the refrigeration cycle device according to the present disclosure can reduce the number of pumps included in the heat medium circuit, compared to conventional refrigeration cycle devices. Therefore, the refrigeration cycle device according to the present disclosure can reduce manufacturing costs and improve reliability compared to conventional refrigeration cycle devices.

1 is a refrigerant circuit diagram showing a refrigeration cycle device according to Embodiment 1. FIG. FIG. 3 is a refrigerant circuit diagram showing a modification of the refrigeration cycle device according to the first embodiment. FIG. 2 is a refrigerant circuit diagram showing an example of a refrigeration cycle device according to a second embodiment. FIG. 2 is a refrigerant circuit diagram showing an example of a refrigeration cycle device according to a second embodiment. FIG. 2 is a refrigerant circuit diagram showing an example of a refrigeration cycle device according to a second embodiment. FIG. 3 is a refrigerant circuit diagram showing a refrigeration cycle device according to a third embodiment. FIG. 7 is a refrigerant circuit diagram showing an example of a refrigeration cycle device according to a fourth embodiment. FIG. 7 is a refrigerant circuit diagram showing an example of a refrigeration cycle device according to a fourth embodiment. FIG. 7 is a refrigerant circuit diagram showing an example of a refrigeration cycle device according to a fourth embodiment. FIG. 7 is a refrigerant circuit diagram showing an example of a refrigeration cycle device according to a fourth embodiment.

Hereinafter, in each embodiment, an example of a refrigeration cycle device according to the present disclosure will be described with reference to drawings and the like. Here, the same reference numerals in the following drawings including FIG. 1 are the same or equivalent. Furthermore, this rule is common throughout the entire text of the embodiments described below. Further, in each of the embodiments below, terms representing directions may be used as appropriate in order to facilitate understanding of an example of a refrigeration cycle device according to the present disclosure. However, the terms representing directions are only used for convenience of explanation, and do not limit the arrangement and orientation of each component of the refrigeration cycle device according to the present disclosure. Note that terms representing directions include, for example, "upper", "lower", "right", "left", "front", "rear", and the like. Further, the refrigeration cycle device according to the present disclosure described in each embodiment is merely an example. The refrigeration cycle device according to the present disclosure is not limited to the form described in the specification. Further, in each embodiment below, an example will be described in which a refrigeration cycle device according to the present disclosure is used as an air conditioner. However, the refrigeration cycle device according to the present disclosure may be used as long as it is a refrigeration application or an air conditioning application. That is, the refrigeration cycle device according to the present disclosure can be used as a refrigerator, a freezer, a vending machine, an air conditioner, a refrigeration device, a water heater, and the like.

Embodiment 1.
FIG. 1 is a refrigerant circuit diagram showing a refrigeration cycle device according to a first embodiment.
The refrigeration cycle device 200 includes a heat medium circuit 8 in which a heat medium circulates. This heat medium circuit 8 includes a plurality of load-side heat exchangers and a plurality of usage-side heat exchangers 3. FIG. 1 illustrates a refrigeration cycle device 200 that includes two load-side heat exchangers and two usage-side heat exchangers 3. As shown in FIG. The plurality of load-side heat exchangers exchange heat between a heat medium and a first refrigerant different from the heat medium. The heat medium supplied from at least one of the load-side heat exchangers flows into the plurality of usage-side heat exchangers 3.

Although the heat medium and the first refrigerant are not particularly limited, for example, the following can be used as the heat medium and the first refrigerant. For example, the heat medium is a calcium chloride aqueous solution, a sodium chloride aqueous solution, a magnesium chloride aqueous solution, brine containing ethylene glycol, antifreeze, water, and the like. For example, the first refrigerant is an olefin refrigerant, an ethylene refrigerant, an ethane refrigerant, propane, or dimethyl ether. Further, for example, the first refrigerant is a mixed refrigerant that is a mixture of at least two of an olefin refrigerant, an ethylene refrigerant, an ethane refrigerant, propane, and dimethyl ether. Note that the olefin refrigerant is tetrafluoropropene or the like. Further, examples of tetrafluoropropene include HFO1234yf and HFO1234ze(E). The ethylene refrigerant is difluoroethylene or the like. The ethane refrigerant is tetrafluoroethane or the like.

Here, at least some of the plurality of load-side heat exchangers of the heat medium circuit 8 can supply heat medium of different temperatures. Hereinafter, one of the load-side heat exchangers will be referred to as a first load-side heat exchanger 1. In addition, in the following, one of the load-side heat exchangers that supplies a heat medium having a temperature different from that of the heat medium supplied by the first load-side heat exchanger 1 is connected to a second load-side heat exchanger. It is called a side heat exchanger 2.

Furthermore, hereinafter, one of the usage-side heat exchangers 3 into which the heat medium supplied from the first load-side heat exchanger 1 flows may be referred to as a first usage-side heat exchanger. Specifically, in the refrigeration cycle device 200 shown in FIG. 1, the usage-side heat exchanger 3 on the upper side of the paper is configured to receive the heat medium supplied from the first load-side heat exchanger 1. Therefore, in the refrigeration cycle apparatus 200 shown in FIG. 1, the usage-side heat exchanger 3 on the upper side of the paper becomes the first usage-side heat exchanger. In addition, in the following, one of the user-side heat exchangers other than the first user-side heat exchanger into which the heat medium supplied from the second load-side heat exchanger 2 flows is referred to as the second user-side heat exchanger. Sometimes called a user-side heat exchanger. Specifically, in the refrigeration cycle apparatus 200 shown in FIG. 1, the usage-side heat exchanger 3 on the lower side of the page is configured to receive the heat medium supplied from the second load-side heat exchanger 2. Therefore, in the refrigeration cycle apparatus 200 shown in FIG. 1, the usage-side heat exchanger 3 on the lower side of the paper becomes the second usage-side heat exchanger.

Further, the heat medium circuit 8 according to the first embodiment includes a confluence section 31, a branch section 32, and a pump 6. The merging section 31 is for merging the heat medium flowing out from the first use-side heat exchanger and the heat medium flowing out from the second use-side heat exchanger. That is, in the first embodiment, the merging section 31 merges the heat medium flowing out from the use-side heat exchanger 3 on the upper side of the page and the heat medium flowing out from the use-side heat exchanger 3 on the bottom side of the page. It is something. The branch part 32 connects the first heat medium pipe 8a through which the heat medium flowing out from the confluence part 31 flows, to the second heat medium pipe 8b connected to the first load-side heat exchanger 1 and the second load-side heat exchanger. 2 and a third heat medium pipe 8c connected to the third heat medium pipe 8c. That is, the branch part 32 connects the first load-side heat exchanger 1 and the second load-side heat exchanger 2 in parallel. The pump 6 is provided between the confluence section 31 and the branch section 32 and circulates the heat medium through the heat medium circuit 8 . In other words, the pump 6 is provided in the first heat medium pipe 8a.

Although the configuration in which the first refrigerant flows through the first load-side heat exchanger 1 and the second load-side heat exchanger 2 is not particularly limited, the refrigeration cycle device 200 according to the first embodiment A first refrigerant circuit 7 is provided to allow the first refrigerant to flow through the exchanger 1 and the second load-side heat exchanger 2. The first refrigerant circuit 7 includes a first load-side heat exchanger 1 and a second load-side heat exchanger 2, and the first refrigerant circulates therein. Although the configuration of the first refrigerant circuit 7 is not particularly limited, in the first embodiment, the first refrigerant circuit 7 is configured as follows.

The first refrigerant circuit 7 includes a compressor 14, a flow path switching device 41, a heat source side heat exchanger 4, a first load side heat exchanger 1, a second load side heat exchanger 2, and a first throttle. It includes a device 21 and a second diaphragm device 22.

The compressor 14 sucks in the first refrigerant, compresses the first refrigerant to a high temperature and high pressure state, and discharges the first refrigerant. As the compressor 14, a rotary compressor, a scroll compressor, a screw compressor, a reciprocating compressor, or the like can be used. A discharge port and a suction port of the first refrigerant of the compressor 14 are connected to a flow path switching device 41 .

The flow path switching device 41 is, for example, a four-way valve, and switches the flow path through which the first refrigerant flows, thereby switching the connection destination of the discharge port and suction port of the compressor 14. In the first embodiment, when the flow path switching device 41 switches to the flow path shown by the solid line in FIG. is connected to the second load side heat exchanger 2. Further, in the first embodiment, when the flow path switching device 41 switches to the flow path shown by the broken line in FIG. 1, the discharge port of the compressor 14 is connected to the second load side heat exchanger 2, 14 inlets are connected to the heat source side heat exchanger 4.

Note that the flow path switching device 41 is not limited to a four-way valve. The flow path switching device 41 may be configured with a two-way valve, a three-way valve, or the like. The same applies to flow path switching devices other than the flow path switching device 41 shown below.

The heat source side heat exchanger 4 functions as an evaporator or a radiator. When functioning as an evaporator, the heat source side heat exchanger 4 exchanges heat between the first refrigerant that has flowed into the interior and outdoor air, and evaporates the first refrigerant. Moreover, when the heat source side heat exchanger 4 functions as a radiator, it exchanges heat between the refrigerant that has flowed into the inside and the outdoor air, and condenses and liquefies the first refrigerant. The operating state of the refrigeration cycle apparatus 200 in which the heat source side heat exchanger 4 functions as an evaporator and the operating state of the refrigeration cycle apparatus 200 in which the heat source side heat exchanger 4 functions as a radiator will be described later. By the way, there are refrigerants that condense when they flow through a radiator and are cooled to a heat exchange target, and refrigerants that do not condense. In the first embodiment, an example will be described in which a refrigerant that is condensed in a radiator is used as the first refrigerant circulating in the first refrigerant circuit 7. Note that when the refrigerant condensed in the radiator flows through the radiator, the radiator is sometimes referred to as a condenser.

Conventionally, heat exchangers include fin-and-tube heat exchangers, microchannel heat exchangers, shell-and-tube heat exchangers, heat pipe heat exchangers, double-tube heat exchangers, and plate heat exchangers. , heat exchangers with various structures have been proposed. An appropriate heat exchanger can be selected from these heat exchangers and used as the heat source side heat exchanger 4. In the first embodiment, the blower 5 is arranged adjacent to the heat source side heat exchanger 4 in order to increase the efficiency of heat exchange between the refrigerant and outdoor air in the heat source side heat exchanger 4. The configuration of the blower 5 is not particularly limited. The blower 5 may be configured with a propeller fan, a line flow fan (registered trademark), a multi-blade centrifugal fan, etc. based on operating conditions such as the flow rate and static pressure of the outdoor air supplied to the heat source side heat exchanger 4. Further, in the case of a configuration in which the heat source side heat exchanger 4 exchanges heat with a heat medium such as water, the heat medium may be supplied to the heat source side heat exchanger 4 with a pump or the like.

This heat source side heat exchanger 4 has one end connected to a flow path switching device 41. Further, the other end of the heat source side heat exchanger 4 is connected to the first load side heat exchanger 1 via the first expansion device 21 .

The first expansion device 21 is provided between the heat source side heat exchanger 4 and the first load side heat exchanger 1. The first expansion device 21 has a function as a pressure reducing valve or an expansion valve, and reduces the pressure of the first refrigerant to expand it. The first expansion device 21 is, for example, an electric expansion valve that can adjust the flow rate of the first refrigerant. Note that the first expansion device 21 is not limited to an electric expansion valve. For example, the first expansion device 21 may be a mechanical expansion valve that uses a diaphragm as a pressure receiving part. Further, for example, the first diaphragm device 21 may be partially constituted by a capillary tube or the like. The same applies to other aperture devices other than the first aperture device 21 described below.

The first load-side heat exchanger 1 functions as an evaporator or a radiator. When functioning as an evaporator, the first load-side heat exchanger 1 exchanges heat between the first refrigerant flowing into the interior and the heat medium circulating through the heat medium circuit 8, and evaporates the first refrigerant. vaporize. In addition, when functioning as a radiator, the first load-side heat exchanger 1 performs heat exchange between the first refrigerant that has flowed into the inside and the heat medium circulating in the heat medium circuit 8, and condenses the first refrigerant. Let it liquefy. The operating state of the refrigeration cycle apparatus 200 in which the first load-side heat exchanger 1 functions as an evaporator and the operating state of the refrigeration cycle apparatus 200 in which the first load-side heat exchanger 1 functions as a radiator will be described later.

Conventionally, heat exchangers include fin-and-tube heat exchangers, microchannel heat exchangers, shell-and-tube heat exchangers, heat pipe heat exchangers, double-tube heat exchangers, and plate heat exchangers. , heat exchangers with various structures have been proposed. An appropriate heat exchanger can be selected from these heat exchangers and used as the first load-side heat exchanger 1. The same applies to the second load side heat exchanger 2.

As described above, one end of the first load-side heat exchanger 1 is connected to the heat source-side heat exchanger 4 via the first expansion device 21. Further, the other end of the first load-side heat exchanger 1 is connected to the second load-side heat exchanger 2 via a second expansion device 22 . That is, in the first refrigerant circuit 7 according to the first embodiment, the first load-side heat exchanger 1 and the second load-side heat exchanger 2 are connected in series to the heat source-side heat exchanger 4.

The second expansion device 22 is provided between the first load-side heat exchanger 1 and the second load-side heat exchanger 2. The second expansion device 22, like the first expansion device 21, has a function as a pressure reduction valve or an expansion valve, and reduces the pressure of the first refrigerant to expand it.

The second load-side heat exchanger 2, like the first load-side heat exchanger 1, functions as an evaporator or a radiator. When the second load-side heat exchanger 2 functions as an evaporator, it exchanges heat between the first refrigerant that has flowed into the inside and the heat medium circulating through the heat medium circuit 8, and evaporates the first refrigerant. vaporize. In addition, when the second load-side heat exchanger 2 functions as a radiator, it exchanges heat between the first refrigerant that has flowed into the inside and the heat medium circulating in the heat medium circuit 8, and condenses the first refrigerant. Let it liquefy. The operating state of the refrigeration cycle apparatus 200 in which the second load-side heat exchanger 2 functions as an evaporator and the operating state of the refrigeration cycle apparatus 200 in which the second load-side heat exchanger 2 functions as a radiator will be described later.

As described above, one end of the second load-side heat exchanger 2 is connected to the first load-side heat exchanger 1 via the second expansion device 22. Further, the other end of the second load side heat exchanger 2 is connected to the flow path switching device 41.

At least a portion of each of the above-described components of the refrigeration cycle device 200 is installed in a unit. In the first embodiment, the refrigeration cycle device 200 includes a heat source unit 201. Furthermore, the refrigeration cycle device 200 includes a heat load unit 202 as a unit separate from the heat source unit 201. Furthermore, the refrigeration cycle device 200 includes a relay unit 203 that connects the heat load unit 202 and the heat source unit 201 as a unit separate from the heat source unit 201. The heat source unit 201 is equipped with a compressor 14, a flow path switching device 41, a heat source side heat exchanger 4, and a blower 5. The relay unit 203 is equipped with a first expansion device 21, a second expansion device 22, a first load-side heat exchanger 1, a second load-side heat exchanger 2, a pump 6, a merging section 31, and a branching section 32. ing. The heat load unit 202 is equipped with a user-side heat exchanger 3. Note that in the first embodiment, each of the user-side heat exchangers 3 is mounted on a different heat load unit 202.

Furthermore, the refrigeration cycle device 200 according to the first embodiment includes a control device 210 that controls the operating state of the refrigeration cycle device 200. Specifically, the control device 210 switches the flow path of the flow path switching device 41. Further, the control device 210 starts and stops the compressor 14. The control device 210 may control the rotation speed of the compressor 14 when the compressor 14 is driven. Thereby, the amount of the first refrigerant discharged from the compressor 14 can be adjusted. Further, the control device 210 controls the opening degrees of the first diaphragm device 21 and the second diaphragm device 22. Further, the control device 210 starts and stops the blower 5. The control device 210 may control the rotation speed of the blower 5 when the blower 5 is driven. Further, the control device 210 starts and stops the pump 6. The control device 210 may control the rotation speed of the pump 6 when the pump 6 is driven. Thereby, the amount of heat medium discharged from the pump 6 can be adjusted. Although the unit in which the control device 210 is mounted is not particularly limited, in the first embodiment, the control device 210 is mounted in the heat source unit 201.

Such a control device 210 is configured with dedicated hardware or a CPU (Central Processing Unit) that executes a program stored in memory. Note that the CPU is also referred to as a central processing unit, processing unit, arithmetic unit, microprocessor, microcomputer, or processor.

When the control device 210 is dedicated hardware, the control device 210 may be, for example, a single circuit, a composite circuit, an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or a combination thereof. Applicable. Each of the functional units implemented by the control device 210 may be implemented using separate hardware, or each functional unit may be implemented using a single piece of hardware.

When the control device 210 is a CPU, each function executed by the control device 210 is realized by software, firmware, or a combination of software and firmware. Software and firmware are written as programs and stored in memory. The CPU implements each function of the control device 210 by reading and executing programs stored in the memory. Here, the memory is, for example, a nonvolatile or volatile semiconductor memory such as RAM, ROM, flash memory, EPROM, or EEPROM.

Note that some of the functions of the control device 210 may be realized by dedicated hardware, and some of them may be realized by software or firmware.

Next, the operation of the refrigeration cycle device 200 will be explained. First, uniform cooling operation performed by the refrigeration cycle device 200 will be described. The uniform cooling operation is an operation in which all the user-side heat exchangers installed in the operating heat load unit 202 cool the indoor air.

When the refrigeration cycle device 200 performs uniform cooling operation, the first refrigerant circuit 7 operates as follows. In the first refrigerant circuit 7, the flow path switching device 41 becomes the flow path shown by the solid line in FIG. Further, in the first refrigerant circuit 7, the heat source side heat exchanger 4 functions as a radiator, and the first load side heat exchanger 1 and the second load side heat exchanger 2 function as an evaporator.

When the compressor 14 is driven in uniform cooling operation, the first refrigerant, which has become a high temperature and high pressure gas refrigerant, is discharged from the discharge port of the compressor 14. The first refrigerant discharged from the compressor 14 passes through the flow path switching device 41 and flows into the heat source side heat exchanger 4 . The first refrigerant, which is a high-temperature, high-pressure gas refrigerant, that has flowed into the heat source side heat exchanger 4 is cooled by the outdoor air supplied by the blower 5 and condensed, and becomes a high-pressure liquid refrigerant. The first refrigerant flowing out from the heat source side heat exchanger 4 then flows into the first expansion device 21 . Note that the first refrigerant, which is a high-temperature, high-pressure gas refrigerant that has flowed into the heat source side heat exchanger 4, may be cooled by outdoor air and condensed to become a gas-liquid two-phase refrigerant that is a mixture of gas refrigerant and liquid refrigerant. be.

The first refrigerant, which is a high-pressure liquid refrigerant, that has flowed into the first expansion device 21 is depressurized and becomes a low-pressure gas-liquid two-phase refrigerant. The first refrigerant, which is a low-pressure gas-liquid two-phase refrigerant, flowing out from the first expansion device 21 flows through the first load-side heat exchanger 1 and the second load-side heat exchanger 2 in this order. Note that, at this time, the second diaphragm device 22 is, for example, fully opened. In the process of flowing through the first load-side heat exchanger 1 and the second load-side heat exchanger 2, the first refrigerant, which is a low-pressure gas-liquid two-phase refrigerant, is heated by the heat medium of the heat medium circuit 8 and becomes a liquid refrigerant. It evaporates and becomes a low-pressure gas refrigerant. In other words, in the first load-side heat exchanger 1 and the second load-side heat exchanger 2, the heat medium in the heat medium circuit 8 is cooled by the first refrigerant in the first refrigerant circuit 7.

The first refrigerant, which is a low-pressure gas refrigerant that has flowed out from the second load-side heat exchanger 2, passes through the flow path switching device 41, is sucked into the compressor 14 from the suction port of the compressor 14, and is drawn into the compressor 14 again. It is compressed and discharged. Thereafter, this cycle is repeated in the first refrigerant circuit 7.

Further, when the refrigeration cycle device 200 performs uniform cooling operation, the heat medium circuit 8 operates as follows. A portion of the heat medium discharged from the discharge port of the pump 6 flows into the first load-side heat exchanger 1 through the branch portion 32 . Further, the remaining part of the heat medium discharged from the discharge port of the pump 6 flows into the second load-side heat exchanger 2 through the branch portion 32 .

The heat medium flowing into the first load-side heat exchanger 1 is cooled by the first refrigerant of the first refrigerant circuit 7 . The heat medium flowing out from the first load-side heat exchanger 1 flows into the usage-side heat exchanger 3 on the upper side of the paper, and cools the indoor air. That is, the room in which the user-side heat exchanger 3 is installed is cooled.
The heat medium flowing into the second load-side heat exchanger 2 is similarly cooled by the first refrigerant of the first refrigerant circuit 7 . The heat medium flowing out from the second load-side heat exchanger 2 flows into the usage-side heat exchanger 3 on the lower side of the page, and cools the indoor air. That is, the room in which the user-side heat exchanger 3 is installed is cooled.

The heat medium flowing out from each of the use-side heat exchangers 3 joins together at a joining part 31. The combined heat medium is then sucked into the pump 6 from the suction port of the pump 6, and is discharged from the pump 6 again. Thereafter, this cycle is repeated in the heat medium circuit 8.

Next, uniform heating operation performed by the refrigeration cycle device 200 will be described. Uniform heating operation is an operation in which all the user-side heat exchangers installed in the operating heat load unit 202 heat indoor air.

When the refrigeration cycle device 200 performs uniform heating operation, the first refrigerant circuit 7 operates as follows. In the first refrigerant circuit 7, the flow path switching device 41 becomes the flow path shown by the broken line in FIG. In the first refrigerant circuit 7, the first load-side heat exchanger 1 and the second load-side heat exchanger 2 function as a radiator, and the heat source-side heat exchanger 4 functions as an evaporator.

When the compressor 14 is driven in the uniform heating operation, the first refrigerant, which has become a high temperature and high pressure gas refrigerant, is discharged from the discharge port of the compressor 14. The first refrigerant discharged from the compressor 14 passes through the flow path switching device 41 and flows to the second load-side heat exchanger 2 and the first load-side heat exchanger 1 in this order. Note that, at this time, the second diaphragm device 22 is, for example, fully opened. In the process of flowing through the second load-side heat exchanger 2 and the first load-side heat exchanger 1, the first refrigerant, which is a high-temperature and high-pressure gas refrigerant, is cooled and condensed by the heat medium of the heat medium circuit 8, and the first refrigerant becomes a high-pressure gas refrigerant. It becomes a liquid refrigerant. In other words, in the second load-side heat exchanger 2 and the first load-side heat exchanger 1, the heat medium in the heat medium circuit 8 is heated by the first refrigerant in the first refrigerant circuit 7. The first refrigerant flowing out from the first load-side heat exchanger 1 then flows into the first expansion device 21 .

The first refrigerant, which is a high-pressure liquid refrigerant, that has flowed into the first expansion device 21 is depressurized and becomes a low-pressure gas-liquid two-phase refrigerant. Then, the first refrigerant, which is a low-pressure gas-liquid two-phase refrigerant, flowing out from the first expansion device 21 flows into the heat source side heat exchanger 4. The first refrigerant, which is a low-pressure gas-liquid two-phase refrigerant that flows into the heat source side heat exchanger 4, is heated by the outdoor air supplied by the blower 5, and the liquid refrigerant evaporates to become a low-pressure gas refrigerant.

The first refrigerant, which is a low-pressure gas refrigerant, flowing out from the heat source side heat exchanger 4 passes through the flow path switching device 41, is sucked into the compressor 14 from the suction port of the compressor 14, and is compressed by the compressor 14 again. and discharged. Thereafter, this cycle is repeated in the first refrigerant circuit 7.

Further, when the refrigeration cycle device 200 performs uniform heating operation, the heat medium circuit 8 operates as follows. A portion of the heat medium discharged from the discharge port of the pump 6 flows into the first load-side heat exchanger 1 through the branch portion 32 . Further, the remaining part of the heat medium discharged from the discharge port of the pump 6 flows into the second load-side heat exchanger 2 through the branch portion 32 .

The heat medium that has flowed into the first load-side heat exchanger 1 is heated by the first refrigerant in the first refrigerant circuit 7 . The heat medium flowing out from the first load-side heat exchanger 1 flows into the usage-side heat exchanger 3 on the upper side of the paper, and heats indoor air. That is, the room in which the user-side heat exchanger 3 is installed is heated.

The heat medium flowing into the second load-side heat exchanger 2 is similarly heated by the first refrigerant of the first refrigerant circuit 7 . The heat medium flowing out from the second load-side heat exchanger 2 flows into the usage-side heat exchanger 3 on the lower side of the page, and heats the indoor air. That is, the room in which the user-side heat exchanger 3 is installed is heated.

The heat medium flowing out from each of the use-side heat exchangers 3 joins together at a joining part 31. The combined heat medium is then sucked into the pump 6 from the suction port of the pump 6, and is discharged from the pump 6 again. Thereafter, this cycle is repeated in the heat medium circuit 8.

Next, the cooling/heating mixed operation executed by the refrigeration cycle device 200 will be described. The cooling/heating mixed operation means that a part of the user-side heat exchanger mounted on the operating heat load unit 202 cools the indoor air, and a part of the user-side heat exchanger mounted on the operating heat load unit 202 cools the indoor air. is the operation that heats the indoor air.

When the refrigeration cycle device 200 performs the cooling/heating mixed operation, the first refrigerant circuit 7 operates as follows. In the first refrigerant circuit 7, the flow path switching device 41 becomes the flow path shown by the solid line in FIG. Further, in the first refrigerant circuit 7, the heat source side heat exchanger 4 and the first load side heat exchanger 1 function as a radiator, and the second load side heat exchanger 2 functions as an evaporator.

When the compressor 14 is driven in the cooling/heating mixed operation, the first refrigerant, which has become a high temperature and high pressure gas refrigerant, is discharged from the discharge port of the compressor 14. The first refrigerant discharged from the compressor 14 passes through the flow path switching device 41 and flows into the heat source side heat exchanger 4 . The first refrigerant, which is a high-temperature, high-pressure gas refrigerant, that has flowed into the heat source side heat exchanger 4 is cooled and condensed by the outdoor air supplied by the blower 5, and becomes a high-pressure gas-liquid two-phase refrigerant. Then, the first refrigerant flowing out from the heat source side heat exchanger 4 passes through the first expansion device 21 and flows into the first load side heat exchanger 1. Note that at this time, the first diaphragm device 21 is, for example, fully opened.

The first refrigerant, which is a high-pressure gas-liquid two-phase refrigerant that has flowed into the first load-side heat exchanger 1, is cooled by the heat medium of the heat medium circuit 8, and the gas refrigerant is condensed to become a high-pressure liquid refrigerant. In other words, in the first load-side heat exchanger 1 , the heat medium in the heat medium circuit 8 is heated by the first refrigerant in the first refrigerant circuit 7 . The first refrigerant flowing out from the first load-side heat exchanger 1 then flows into the second expansion device 22 . The first refrigerant, which is a high-pressure liquid refrigerant, that has flowed into the second expansion device 22 is depressurized and becomes a low-pressure gas-liquid two-phase refrigerant. Then, the first refrigerant, which is a low-pressure gas-liquid two-phase refrigerant, flowing out from the second expansion device 22 flows into the second load-side heat exchanger 2 . The first refrigerant, which is a low-pressure gas-liquid two-phase refrigerant, that has flowed into the second load-side heat exchanger 2 is heated by the heat medium of the heat medium circuit 8, and the liquid refrigerant evaporates, becoming a low-pressure gas refrigerant. In other words, in the second load-side heat exchanger 2 , the heat medium in the heat medium circuit 8 is cooled by the first refrigerant in the first refrigerant circuit 7 .

The first refrigerant, which is a low-pressure gas refrigerant that has flowed out from the second load-side heat exchanger 2, passes through the flow path switching device 41, is sucked into the compressor 14 from the suction port of the compressor 14, and is drawn into the compressor 14 again. It is compressed and discharged. Thereafter, this cycle is repeated in the first refrigerant circuit 7.

Further, when the refrigeration cycle device 200 performs the cooling/heating mixed operation, the heat medium circuit 8 operates as follows. A portion of the heat medium discharged from the pump 6 flows into the first load-side heat exchanger 1 through the branch portion 32 . Further, the remaining part of the heat medium discharged from the discharge port of the pump 6 flows into the second load-side heat exchanger 2 through the branch portion 32 .

The heat medium that has flowed into the first load-side heat exchanger 1 is heated by the first refrigerant in the first refrigerant circuit 7 . The heat medium flowing out from the first load-side heat exchanger 1 flows into the usage-side heat exchanger 3 on the upper side of the paper, and heats indoor air. That is, the room in which the user-side heat exchanger 3 is installed is heated.

The heat medium flowing into the second load-side heat exchanger 2 is cooled by the first refrigerant of the first refrigerant circuit 7 . The heat medium flowing out from the second load-side heat exchanger 2 flows into the usage-side heat exchanger 3 on the lower side of the page, and cools the indoor air. That is, the room in which the user-side heat exchanger 3 is installed is cooled.

The heat medium flowing out from each of the use-side heat exchangers 3 joins together at a joining part 31. The combined heat medium is then sucked into the pump 6 from the suction port of the pump 6, and is discharged from the pump 6 again. Thereafter, this cycle is repeated in the heat medium circuit 8.

Note that there is a user-side heat exchanger 3 into which the heat medium supplied from the first load-side heat exchanger 1 flows, and a user-side heat exchanger 3 into which the heat medium supplied from the second load-side heat exchanger 2 flows. may be mounted on the same heat load unit 202. In this case, the refrigeration cycle device 200 performs an operation similar to the cooling/heating mixed operation described above, so that some of the user-side heat exchangers 3 cool and dehumidify the indoor air, and some of the user-side heat exchangers 3 The indoor air dehumidified by the container 3 can be heated and returned indoors. For this reason, there is a user-side heat exchanger 3 into which the heat medium supplied from the first load-side heat exchanger 1 flows, and a user-side heat exchanger into which the heat medium supplied from the second load-side heat exchanger 2 flows. By mounting the same heat load unit 202 with the heat load unit 202, a dehumidifying operation that dehumidifies the air in the room where the heat load unit 202 is installed becomes possible.

In addition, the refrigeration cycle device 200 according to the first embodiment can perform cooling/heating mixed operation by using the flow path switching device 41 as the flow path shown by the broken line in FIG. 1 and controlling the opening degree of the first throttle device 21. Alternatively, dehumidification operation can be performed. In this case, in the first refrigerant circuit 7, the second load-side heat exchanger 2 functions as a radiator, and the heat source-side heat exchanger 4 and the first load-side heat exchanger 1 function as an evaporator.

As described above, the refrigeration cycle device 200 according to the first embodiment includes the heat medium circuit 8 in which a heat medium different from the first refrigerant circulates. The heat medium circuit 8 includes a plurality of load-side heat exchangers and a plurality of usage-side heat exchangers 3. The plurality of load-side heat exchangers exchange heat between the first refrigerant and the heat medium. The heat medium supplied from at least one of the load-side heat exchangers flows into the plurality of usage-side heat exchangers 3. Here, the first load-side heat exchanger 1, the first usage-side heat exchanger, the second load-side heat exchanger 2, and the second usage-side heat exchanger are defined as follows. One of the load-side heat exchangers is referred to as a first load-side heat exchanger 1. One of the usage-side heat exchangers 3 into which the heat medium supplied from the first load-side heat exchanger 1 flows is defined as a first usage-side heat exchanger. Among the load-side heat exchangers, one of the load-side heat exchangers that supplies a heat medium at a temperature different from that of the heat medium supplied by the first load-side heat exchanger 1 is replaced with the second load-side heat exchanger. Set it to 2. Among the user-side heat exchangers 3 into which the heat medium supplied from the second load-side heat exchanger 2 flows, one of the user-side heat exchangers other than the first user-side heat exchanger is replaced with a second user-side heat exchanger. Use as an exchanger. Further, the heat medium circuit 8 includes a confluence section 31, a branch section 32, and a pump 6. The merging section 31 is for merging the heat medium flowing out from the first use-side heat exchanger and the heat medium flowing out from the second use-side heat exchanger. The branching part 32 connects the first heat medium pipe 8a through which the premedium flowing out from the confluence part 31 flows, to the second heat medium pipe 8b connected to the first load-side heat exchanger 1 and the second load-side heat exchanger 2. The first load-side heat exchanger 1 and the second load-side heat exchanger 2 are connected in parallel. The pump 6 is provided between the confluence section 31 and the branch section 32 and circulates the heat medium.

When the first load-side heat exchanger 1 and the second load-side heat exchanger 2 are defined as described above, in the conventional refrigeration cycle device, the heat medium is connected to the heat medium circuit, and the first load-side heat exchanger 1 is connected to the heat medium. and a pump that supplies the heat medium to the second load-side heat exchanger 2. In other words, in the heat medium circuit of such a conventional refrigeration cycle device, it is necessary to supply heat medium to the first load-side heat exchanger 1 and the second load-side heat exchanger 2 using separate pumps. Ta. Here, the pump that supplies the heat medium to the load-side heat exchanger is expensive. Furthermore, as the number of pumps that supply heat medium to the load-side heat exchanger increases, the probability that the pumps will fail also increases. For this reason, conventional refrigeration cycle devices have had the problems of increased manufacturing costs and decreased reliability.

On the other hand, the heat medium circuit 8 of the refrigeration cycle device 200 according to the first embodiment supplies the heat medium to the first load-side heat exchanger 1 and the second load-side heat exchanger 2 using one pump 6. I can do it. Therefore, in the refrigeration cycle device 200 according to the first embodiment, the number of pumps 6 included in the heat medium circuit 8 can be reduced compared to the conventional refrigeration cycle device. Therefore, the refrigeration cycle device 200 according to the first embodiment can reduce manufacturing costs and improve reliability compared to conventional refrigeration cycle devices.

At the end of the first embodiment, a modification of the refrigeration cycle device 200 according to the first embodiment will be introduced. In the modified example of the refrigeration cycle device 200 according to the first embodiment shown below, in addition to the above-mentioned effects of reducing manufacturing costs and improving reliability, further effects can be obtained.

FIG. 2 is a refrigerant circuit diagram showing a modification of the refrigeration cycle device according to the first embodiment.
In the refrigeration cycle device 200 shown in FIG. 2, the heat medium inlet of the first user heat exchanger and the heat medium inlet of the second user heat exchanger are It is connected to the medium outlet and the heat medium outlet of the second load-side heat exchanger 2 . That is, in the refrigeration cycle apparatus 200 shown in FIG. 2, the heat medium inlet of the user-side heat exchanger 3 on the upper side of the paper and the heat medium inlet of the user-side heat exchanger 3 on the lower side of the paper are connected to the first load. It is connected to the heat medium outlet of the side heat exchanger 1 and the heat medium outlet of the second load side heat exchanger 2 .

The heat medium circuit 8 of the refrigeration cycle device 200 shown in FIG. 60. The first flow rate adjustment section 60 adjusts the flow rate of the heat medium supplied from the first load-side heat exchanger 1 and the flow rate of the heat medium supplied from the second load-side heat exchanger 2. The first flow rate adjustment section 60 is controlled by the control device 210.

That is, the heat medium circuit 8 shown in FIG. 2 allows the heat medium to flow into both of the two user-side heat exchangers 3 from both the first load-side heat exchanger 1 and the second load-side heat exchanger 2. The structure is as follows. In such a configuration, the heat medium supplied from the first load-side heat exchanger 1 flows into the utilization-side heat exchanger 3 on the upper side of the page, and the heat medium supplied from the second load-side heat exchanger 2 flows into the user-side heat exchanger 3 on the upper side of the paper. If the flow is into the user-side heat exchanger 3 at the bottom of the page, the user-side heat exchanger 3 at the top of the page becomes the first user-side heat exchanger, and the user-side heat exchanger 3 at the bottom of the page becomes the second user-side heat exchanger. It becomes a side heat exchanger. In addition, the heat medium supplied from the first load-side heat exchanger 1 flows into the usage-side heat exchanger 3 on the lower side of the paper, and the heat medium supplied from the second load-side heat exchanger 2 flows into the usage-side heat exchanger 3 on the upper side of the paper. If the flow is flowing into the side heat exchanger 3, the user-side heat exchanger 3 on the lower side of the paper becomes the first user-side heat exchanger, and the user-side heat exchanger 3 on the upper side of the paper becomes the second user-side heat exchanger. Become. In addition, when the heat medium supplied from both the first load-side heat exchanger 1 and the second load-side heat exchanger 2 is flowing into both of the two user-side heat exchangers 3, the two user-side heat exchangers 3 One of the heat exchangers 3 becomes a first usage-side heat exchanger, and the other of the two usage-side heat exchangers 3 becomes a second usage-side heat exchanger.

Although the configuration of the first flow rate adjustment section 60 is not particularly limited, in the refrigeration cycle device 200 shown in FIG. It becomes. The confluence section 33 is a heat medium pipe that is provided on the heat medium inflow side of each user-side heat exchanger 3 and extends from the heat medium outlet of the first load-side heat exchanger 1 toward the user-side heat exchanger 3. and a heat medium pipe extending from the heat medium outlet of the second load-side heat exchanger 2 toward the usage-side heat exchanger 3. The flow rate adjustment device 61 is provided in a heat medium pipe extending from the heat medium outlet of the first load-side heat exchanger 1 toward the user-side heat exchanger 3, and is configured to adjust the flow rate from the first load-side heat exchanger 1 to the user-side heat exchanger 3. The flow rate of the heat medium supplied to the exchanger 3 is adjusted. The flow rate adjustment device 62 is provided in a heat medium pipe extending from the heat medium outlet of the second load-side heat exchanger 2 toward the use-side heat exchanger 3, and is configured to adjust the flow rate from the second load-side heat exchanger 2 to the use-side heat exchanger 3. The flow rate of the heat medium supplied to the exchanger 3 is adjusted.

Here, for example, in a cooling/heating mixed operation, etc., an operating state in which the heat exchange capacity required of the first load-side heat exchanger 1 is large and the heat exchange capacity required of the second load-side heat exchanger 2 is small is assumed. Suppose. As described above, in the conventional refrigeration cycle device, it was necessary to supply heat medium to the first load-side heat exchanger 1 and the second load-side heat exchanger 2 using separate pumps. For this reason, in the conventional refrigeration cycle device, when the above-mentioned assumed operating state is reached, the pump that supplies the heat medium to the second load-side heat exchanger 2 has surplus power, and the first load-side heat exchanger The capacity of the pump that supplies the heat medium to the vessel 1 may be insufficient. In other words, in the conventional refrigeration cycle device, when the above-mentioned assumed operating state is reached, even though the pump that supplies the heat medium to the second load-side heat exchanger 2 has surplus power, the first load-side heat exchanger 2 There were cases where the heat medium supplied to the exchanger 1 became insufficient. If the heat medium supplied to the first load-side heat exchanger 1 becomes insufficient in this way, the energy saving performance of the refrigeration cycle device will deteriorate. In conventional refrigeration cycle devices, one possible way to suppress this decrease in energy saving is to increase the size of each pump. However, increasing the size of each pump also increases the size of the refrigeration cycle device.

On the other hand, the refrigeration cycle device 200 shown in FIG. distribution ratio can be adjusted. Therefore, the refrigeration cycle device 200 shown in FIG. 2 can prevent the heat medium supplied to the first load-side heat exchanger 1 from running out, without increasing the size of the pump 6. Therefore, the refrigeration cycle device 200 shown in FIG. 2 can both suppress a decrease in energy saving performance and suppress an increase in size. Note that the flow rate adjustment device 61 and the flow rate adjustment device 62 may be an opening degree adjustment valve that can control the degree of opening, or may be an on-off valve that can only open and close. When using on-off valves as the flow rate adjustment device 61 and the flow rate adjustment device 62, by controlling the number of usage side heat exchangers 3 to which heat medium is supplied from the first load side heat exchanger 1, The distribution ratio between the heat medium supplied to the exchanger 1 and the heat medium supplied to the second load-side heat exchanger 2 can be adjusted.

Embodiment 2.
The configuration of the first refrigerant circuit 7 is not limited to the configuration shown in the first embodiment. For example, the first refrigerant circuit 7 may be configured as in the second embodiment. Note that matters not particularly mentioned in the second embodiment are the same as those in the first embodiment. Furthermore, in the second embodiment, components that perform the same functions as those shown in the first embodiment are given the same reference numerals as those in the first embodiment.

3 to 5 are refrigerant circuit diagrams showing an example of the refrigeration cycle device according to the second embodiment.
Like the refrigeration cycle device 200 shown in Embodiment 1, the refrigeration cycle device 200 according to the second embodiment can perform uniform cooling operation, uniform heating operation, and mixed cooling and heating operation. Furthermore, similar to the refrigeration cycle device 200 shown in the first embodiment, the refrigeration cycle device 200 according to the second embodiment is configured to provide heat on the user side into which the heat medium supplied from the first load-side heat exchanger 1 flows. The exchanger 3 and the user-side heat exchanger 3 into which the heat medium supplied from the second load-side heat exchanger 2 flows are mounted on the same heat load unit 202, and an operation similar to the cooling/heating mixed operation is performed. By doing so, it is possible to perform a dehumidification operation that dehumidifies the air in the room where the heat load unit 202 is installed.

Specifically, in the refrigeration cycle device 200 shown in FIG. 3, when performing uniform cooling operation, the flow path switching device 42 is set as the flow path shown by the solid line in FIG. 3, and the flow path switching device 43 is set as the flow path shown by the broken line in FIG. The flow path is as shown by , and at least one of the switching device 51 and the switching device 52 is in an open state, and at least one of the switching device 53 and the switching device 54 is in an open state. Thereby, in the first refrigerant circuit 7, the heat source side heat exchanger 4 functions as a radiator, and the first load side heat exchanger 1 and the second load side heat exchanger 2 function as an evaporator. The refrigeration cycle device 200 shown in FIG. 3 can perform uniform cooling operation. Note that the first refrigerant flowing out of the heat source side heat exchanger 4 and flowing into the first load side heat exchanger 1 is depressurized by the expansion device 17 and expands. Further, the first refrigerant flowing out of the heat source side heat exchanger 4 and flowing into the second load side heat exchanger 2 is depressurized by the expansion device 18 and expands.

In addition, in the refrigeration cycle device 200 shown in FIG. 3, when performing uniform heating operation, the flow path switching device 42 is set to the flow path shown by the broken line in FIG. 3, and the flow path switching device 43 is set to the flow path shown by the solid line in FIG. The switching device 51 is opened, the switching device 52 is closed, the switching device 53 is closed, and the switching device 54 is opened. Thereby, in the first refrigerant circuit 7, the first load-side heat exchanger 1 and the second load-side heat exchanger 2 function as a radiator, and the heat source-side heat exchanger 4 functions as an evaporator. The refrigeration cycle device 200 shown in FIG. 3 can perform uniform heating operation. Note that the first refrigerant flowing out of the first load-side heat exchanger 1 and flowing into the heat source-side heat exchanger 4 is depressurized by the expansion device 17 and expands. Further, the first refrigerant flowing out of the second load side heat exchanger 2 and flowing into the heat source side heat exchanger 4 is depressurized by the expansion device 18 and expands.

In addition, in the refrigeration cycle device 200 shown in FIG. 3, when performing cooling/heating mixed operation, the flow path switching device 42 is the flow path shown by the broken line in FIG. 3, and the flow path switching device 43 is the path shown by the solid line in FIG. The opening/closing device 51 is opened, the opening/closing device 52 is closed, the opening/closing device 53 is opened, and the opening/closing device 54 is closed. Thereby, in the first refrigerant circuit 7, the first load side heat exchanger 1 functions as a radiator, and the heat source side heat exchanger 4 and the second load side heat exchanger 2 function as an evaporator. The refrigeration cycle device 200 shown in FIG. 3 can perform mixed heating and cooling operation. Note that the first refrigerant flowing out of the first load-side heat exchanger 1 and flowing into the heat source-side heat exchanger 4 and the second load-side heat exchanger 2 is depressurized by, for example, the expansion device 17 and expands.

In addition, in the refrigeration cycle device 200 shown in FIG. 3, when performing cooling/heating mixed operation, the flow path switching device 42 is set as the flow path shown in broken lines in FIG. 3, and the flow path switching device 43 is set as the flow path shown in broken lines in FIG. The opening/closing device 51 is closed, the opening/closing device 52 is open, the opening/closing device 53 is closed, and the opening/closing device 54 is opened. Thereby, in the first refrigerant circuit 7, the heat source side heat exchanger 4 and the second load side heat exchanger 2 function as a radiator, and the first load side heat exchanger 1 functions as an evaporator. The refrigeration cycle device 200 shown in FIG. 3 can perform mixed heating and cooling operation. Note that the first refrigerant flowing out from the heat source side heat exchanger 4 and the second load side heat exchanger 2 and flowing into the first load side heat exchanger 1 is depressurized and expanded by the expansion device 17, for example.

Specifically, in the refrigeration cycle device 200 shown in FIGS. 4 and 5, when performing uniform cooling operation, the flow path switching device 42 is set to the flow path shown in solid lines in FIGS. 4 and 5, and the flow path The switching device 43 is a flow path shown in solid lines in FIGS. 4 and 5. Thereby, in the first refrigerant circuit 7, the heat source side heat exchanger 4 functions as a radiator, and the first load side heat exchanger 1 and the second load side heat exchanger 2 function as an evaporator. The refrigeration cycle device 200 shown in FIGS. 4 and 5 can perform uniform cooling operation. Note that the first refrigerant flowing out of the heat source side heat exchanger 4 and flowing into the first load side heat exchanger 1 is depressurized by the expansion device 17 and expands. Further, the first refrigerant flowing out of the heat source side heat exchanger 4 and flowing into the second load side heat exchanger 2 is depressurized by the expansion device 18 and expands.

In addition, in the refrigeration cycle device 200 shown in FIGS. 4 and 5, when performing uniform heating operation, the flow path switching device 42 is set as the flow path shown by the broken line in FIGS. The flow path is indicated by a broken line in FIGS. 4 and 5. Thereby, in the first refrigerant circuit 7, the first load-side heat exchanger 1 and the second load-side heat exchanger 2 function as a radiator, and the heat source-side heat exchanger 4 functions as an evaporator. The refrigeration cycle device 200 shown in FIGS. 4 and 5 can perform uniform heating operation. Note that the first refrigerant flowing out of the first load-side heat exchanger 1 and flowing into the heat source-side heat exchanger 4 is depressurized by the expansion device 17 and expands. Further, the first refrigerant flowing out of the second load side heat exchanger 2 and flowing into the heat source side heat exchanger 4 is depressurized by the expansion device 18 and expands.

In addition, in the refrigeration cycle device 200 shown in FIGS. 4 and 5, when performing cooling/heating mixed operation, the flow path switching device 42 is changed to the flow path shown by the broken line in FIGS. 4 and 5, and the flow path switching device 43 is The flow path is shown by a solid line in FIGS. 4 and 5. Thereby, in the first refrigerant circuit 7, the first load side heat exchanger 1 functions as a radiator, and the heat source side heat exchanger 4 and the second load side heat exchanger 2 function as an evaporator. The refrigeration cycle device 200 shown in FIGS. 4 and 5 can perform mixed heating and cooling operation. Note that the first refrigerant flowing out of the first load-side heat exchanger 1 and flowing into the heat source-side heat exchanger 4 and the second load-side heat exchanger 2 is depressurized by, for example, the expansion device 17 and expands.

In addition, in the refrigeration cycle device 200 shown in FIGS. 4 and 5, when performing cooling/heating mixed operation, the flow path switching device 42 is changed to the flow path shown by the solid line in FIGS. 4 and 5, and the flow path switching device 43 is The flow path is indicated by a broken line in FIGS. 4 and 5. Thereby, in the first refrigerant circuit 7, the heat source side heat exchanger 4 and the second load side heat exchanger 2 function as a radiator, and the first load side heat exchanger 1 functions as an evaporator. The refrigeration cycle device 200 shown in FIGS. 4 and 5 can perform mixed heating and cooling operation. Note that the first refrigerant flowing out from the heat source side heat exchanger 4 and the second load side heat exchanger 2 and flowing into the first load side heat exchanger 1 is depressurized and expanded by the expansion device 17, for example.

Here, in the first refrigerant circuit 7 of the refrigeration cycle device 200 according to the second embodiment, when performing uniform cooling operation and heating operation, the first load-side heat exchanger 1 and the second load-side heat exchanger 2 is connected in parallel to the heat source side heat exchanger 4. In other words, in the first refrigerant circuit 7 of the refrigeration cycle device 200 according to the second embodiment, when both the first load-side heat exchanger 1 and the second load-side heat exchanger 2 function as radiators, And, when both the first load-side heat exchanger 1 and the second load-side heat exchanger 2 function as evaporators, the first load-side heat exchanger 1 and the second load-side heat exchanger 2 are on the heat source side. It has a configuration in which it is connected in parallel to the heat exchanger 4.

In the refrigeration cycle device 200 shown in Embodiment 1, when performing uniform cooling operation, the first load-side heat exchanger 1 and the second load-side heat exchanger 2, which function as evaporators, are connected in series. There is. In this case, the state of the first refrigerant flowing into the second load-side heat exchanger 2 differs depending on the load covered by the first load-side heat exchanger 1. Furthermore, in the refrigeration cycle device 200 shown in Embodiment 1, when performing uniform heating operation, the first load-side heat exchanger 1 and the second load-side heat exchanger 2, which function as evaporators, are connected in series. has been done. In this case, the state of the first refrigerant flowing into the first load-side heat exchanger 1 differs depending on the load covered by the second load-side heat exchanger 2. Therefore, in the refrigeration cycle device 200 shown in Embodiment 1, when performing uniform cooling operation and heating operation, the first flow rate adjustment section 60 and the like are used, and the first load side heat exchanger 1 and the second load side It is necessary to adjust the distribution ratio between the heat medium supplied to the first load-side heat exchanger 1 and the heat medium supplied to the second load-side heat exchanger 2 depending on the heat exchange capacity of each side heat exchanger 2. may occur. However, when the distribution ratio between the heat medium supplied to the first load-side heat exchanger 1 and the heat medium supplied to the second load-side heat exchanger 2 is adjusted, the flow resistance of the heat medium in the heat medium circuit 8 increases. increases, and the flow rate of the heat medium decreases. As a result, the energy saving performance of the refrigeration cycle device 200 decreases.

On the other hand, in the refrigeration cycle device 200 according to the second embodiment, as described above, when performing uniform cooling operation and heating operation, the first load-side heat exchanger 1 and the second load-side heat exchanger 2 are , are connected in parallel to the heat source side heat exchanger 4. Therefore, in the refrigeration cycle device 200 according to the second embodiment, when performing uniform cooling operation and heating operation, one of the first load-side heat exchanger 1 and the second load-side heat exchanger 2 is Regardless of the load being carried, the first refrigerant in the same state can be supplied to the other of the first load-side heat exchanger 1 and the second load-side heat exchanger 2. Therefore, in the refrigeration cycle device 200 according to the second embodiment, when performing uniform cooling operation and heating operation, the heat medium supplied to the first load-side heat exchanger 1 and the second load-side heat exchanger 2 There is no need for a mechanism to adjust the distribution ratio between the heating medium and the heat medium supplied to the heating medium. Therefore, in the refrigeration cycle device 200 according to the second embodiment, the first load-side heat exchanger 1 and the second load-side heat exchanger 2 are connected in series when performing uniform cooling operation and heating operation. Compared to the refrigeration cycle device 200 having the above configuration, energy saving is improved. Note that, as shown in FIG. 6, when the refrigeration cycle device 200 according to the second embodiment includes the first flow rate adjustment section 60, the flow rate adjustment device 61 and the flow rate adjustment device 62 may be fully opened.

Further, in the first refrigerant circuit 7 of the refrigeration cycle device 200 according to the second embodiment, when performing the cooling/heating mixed operation or the dehumidifying operation, the heat source side heat exchanger 4 and the second load side heat exchanger 2 are , are connected in parallel to the first load-side heat exchanger 1. In other words, in the first refrigerant circuit 7 of the refrigeration cycle device 200 according to the second embodiment, the first load-side heat exchanger 1 functions as one of the radiator and the evaporator, and the heat source-side heat exchanger 1 functions as one of the radiator and the evaporator. 4 and the second load-side heat exchanger 2 function as the other of the radiator and the evaporator, the heat source-side heat exchanger 4 and the second load-side heat exchanger 2 function as the first load-side heat exchanger 1 The configuration is such that they are connected in parallel.

In the cooling/heating mixed operation or dehumidification operation, when the heat source side heat exchanger 4 and the second load side heat exchanger 2 are connected in series to the first load side heat exchanger 1, the second load side heat exchanger 2 capacity may be lacking. For example, when the heat source side heat exchanger 4 and the second load side heat exchanger 2 are connected in series to the first load side heat exchanger 1, when the required load for cooling is larger than the required load for heating, the heat source The side heat exchanger 4 and the second load side heat exchanger 2 function as a radiator. In this case, the first refrigerant, which is a gas refrigerant discharged from the compressor 14, is condensed in the heat source side heat exchanger 4 to become a gas-liquid two-phase refrigerant, and then flows into the second load side heat exchanger 2. That will happen. That is, the first refrigerant with a small amount of gas flows into the second load-side heat exchanger 2. Therefore, the capacity of the second load-side heat exchanger 2 may be insufficient. In order to compensate for this lack of capacity, it is necessary to increase the rotation speed of the compressor 14, but this will reduce the energy saving performance of the refrigeration cycle device 200.

On the other hand, in the refrigeration cycle device 200 according to the second embodiment, as described above, when performing the cooling/heating mixed operation or the dehumidifying operation, the heat source side heat exchanger 4 and the second load side heat exchanger 2 It has a configuration in which it is connected in parallel to the first load side heat exchanger 1. Therefore, in the refrigeration cycle device 200 according to the second embodiment, when the heat source side heat exchanger 4 and the second load side heat exchanger 2 function as radiators, the heat source side heat exchanger 4 and the second load side heat exchanger 2 The first refrigerant, which is a gas refrigerant discharged from the compressor 14, flows into both side heat exchangers 2. Therefore, the refrigeration cycle device 200 according to the second embodiment can suppress insufficient capacity of the second load-side heat exchanger 2 when performing the cooling/heating mixed operation or the dehumidifying operation. Therefore, the refrigeration cycle device 200 according to the second embodiment has a configuration in which the heat source side heat exchanger 4 and the second load side heat exchanger 2 are connected in series when performing the cooling/heating mixed operation or the dehumidifying operation. Compared to the refrigeration cycle device 200 shown in FIG.

Embodiment 3.
By configuring the refrigeration cycle device 200 as in the third embodiment, the energy saving of the refrigeration cycle device 200 is further improved. Note that matters not particularly mentioned in the third embodiment are the same as those in the first embodiment or the second embodiment. Further, in the third embodiment, the same reference numerals as in the first embodiment or the second embodiment are given to the components that perform the same functions as the structures shown in the first or second embodiment.

FIG. 6 is a refrigerant circuit diagram showing a refrigeration cycle device according to Embodiment 3.
In the heat medium circuit 8 of the refrigeration cycle device 200 according to the third embodiment, the heat medium outlet of the first user-side heat exchanger and the heat medium outlet of the second user-side heat exchanger are connected to the confluence section. 31 and a fifth heat medium pipe 8e connected to the confluence part 31. In other words, in the heat medium circuit 8 of the refrigeration cycle device 200 according to the third embodiment, the outlet of each of the two user-side heat exchangers 3 is connected to the fourth heat medium pipe 8d connected to the confluence section 31. and a fifth heat medium pipe 8e connected to the confluence section 31. In addition, in this Embodiment 3, the end part by the side of the utilization side heat exchanger 3 of the 4th heat medium piping 8d and the 5th heat medium piping 8e is comprised as a common heat medium piping. In other words, in the third embodiment, the heat medium pipe extending from the utilization side heat exchanger 3 to the confluence part 31 is branched into the fourth heat medium pipe 8d and the fifth heat medium pipe 8e at the branch part 34. There is.

In addition, the heat medium circuit 8 of the refrigeration cycle device 200 according to the third embodiment includes a heat medium outflow side of the first usage side heat exchanger and a heat medium outflow side of the second usage side heat exchanger. 2 flow rate adjustment parts 65. The second flow rate adjustment section 65 adjusts the flow rate of the heat medium flowing into the fourth heat medium pipe 8d and the flow rate of the heat medium flowing into the fifth heat medium pipe 8e. The second flow rate adjustment section 65 is controlled by the control device 210.

Although the configuration of the second flow rate adjustment section 65 is not particularly limited, in the refrigeration cycle device 200 according to the third embodiment, the second flow rate adjustment section 65 has a configuration including a flow rate adjustment device 66 and a flow rate adjustment device 67. It has become. The flow rate adjustment device 66 is provided in the fourth heat medium pipe 8d, and adjusts the flow rate of the heat medium flowing into the fourth heat medium pipe 8d from the user-side heat exchanger 3. The flow rate adjustment device 67 is provided in the fifth heat medium piping 8e, and adjusts the flow rate of the heat medium flowing from the user-side heat exchanger 3 into the fifth heat medium piping 8e.

Furthermore, the refrigeration cycle device 200 according to the third embodiment includes a second refrigerant circuit 9 in which a second refrigerant circulates. Although the second refrigerant is not particularly limited, for example, the following can be used as the second refrigerant. For example, the first refrigerant is an olefin refrigerant, an ethylene refrigerant, an ethane refrigerant, propane, or dimethyl ether. Further, for example, the first refrigerant is a mixed refrigerant that is a mixture of at least two of an olefin refrigerant, an ethylene refrigerant, an ethane refrigerant, propane, and dimethyl ether. Note that the second refrigerant may be the same as the first refrigerant or may be different from the first refrigerant.

The second refrigerant circuit 9 includes a compressor 16 that circulates the second refrigerant, a throttle device 20 that decompresses and expands the second refrigerant, a first heat recovery heat exchanger 11, and a second heat recovery heat exchanger. 12. The first heat recovery heat exchanger 11 is provided between the heat medium outlet of the second load-side heat exchanger 2 and the second usage-side heat exchanger, and exchanges heat between the second refrigerant and the heat medium. It is something. The second heat recovery heat exchanger 12 is for exchanging heat between the heat medium flowing through the fifth heat medium pipe 8e and the second refrigerant. Note that starting and stopping of the compressor 16 is controlled by a control device 210. The control device 210 may control the rotation speed of the compressor 16 when the compressor 16 is driven.

When one of the first heat recovery heat exchanger 11 and the second heat recovery heat exchanger 12 functions as a radiator, the first heat recovery heat exchanger 11 and the second heat recovery heat exchanger 12 function as a radiator. The other of the heat recovery heat exchanger 11 and the second heat recovery heat exchanger 12 functions as an evaporator. Note that the second refrigerant circuit 9 according to the third embodiment includes a flow path switching device 45 so that the function of the first heat recovery heat exchanger 11 and the function of the second heat recovery heat exchanger 12 can be interchanged. It is equipped with That is, for example, by switching the flow path of the flow path switching device 45 in a state where the first heat recovery heat exchanger 11 functions as a radiator and the second heat recovery heat exchanger 12 functions as an evaporator. , the first heat recovery heat exchanger 11 functions as an evaporator, and the second heat recovery heat exchanger 12 functions as a radiator. Note that switching of the flow path of the flow path switching device 45 is performed by the control device 210.

The second refrigerant circuit 9 operates as follows. The temperature of the heat medium flowing through the fifth heat medium pipe 8e toward the confluence section 31 after passing through the second heat recovery heat exchanger 12, and the temperature of the heat medium flowing through the fourth heat medium pipe 8d toward the confluence section 31. The second refrigerant circuit 9 operates so that a prescribed temperature difference is achieved. Note that the method for measuring the temperature of the heat medium flowing through the fifth heat medium pipe 8e toward the confluence section 31 after passing through the second heat recovery heat exchanger 12 is not particularly limited. In the third embodiment, a temperature measuring device 72 is provided at a location between the second heat recovery heat exchanger 12 and the merging portion 31 in the fifth heat medium pipe 8e. Then, the temperature measuring device 72 measures the temperature of the heat medium flowing through the fifth heat medium pipe 8e toward the confluence section 31 after passing through the second heat recovery heat exchanger 12. Furthermore, the method for measuring the temperature of the heat medium flowing through the fourth heat medium pipe 8d toward the confluence portion 31 is not particularly limited. In the third embodiment, a temperature measuring device 71 is provided in the fourth heat medium pipe 8d. Then, the temperature measurement device 71 measures the temperature of the heat medium flowing through the fourth heat medium pipe 8d toward the confluence section 31.

Specifically, for example, the second flow rate adjustment unit 65 is controlled such that the temperature of the heat medium flowing into the fifth heat medium pipe 8e is lower than the temperature of the heat medium flowing into the fourth heat medium pipe 8d. Suppose that For example, the heat medium flowing out from the user-side heat exchanger 3 that cools indoor air flows into the fifth heat medium pipe 8e, and the heat medium flowing out from the user-side heat exchanger 3 that heats indoor air flows into the fourth heat medium pipe 8e. This is a case where the second flow rate adjustment section 65 is controlled so that the flow rate flows into the pipe 8d. In such a case, the flow path switching device 45 of the second refrigerant circuit 9 has a flow path that causes the first heat recovery heat exchanger 11 to function as an evaporator and the second heat recovery heat exchanger 12 to function as a condenser. Become. Then, the second refrigerant circuit 9 starts the compressor 16, for example, when the temperature measured by the temperature measuring device 72 and the temperature measured by the temperature measuring device 71 are larger than a prescribed temperature difference. In addition, when the temperature measured by the temperature measuring device 72 and the temperature measured by the temperature measuring device 71 become equal to or less than a specified temperature difference, the second refrigerant circuit 9 stops the compressor 16 or stops the compressor 16 at the rotation speed of the compressor 16. decrease. Note that the second refrigerant circuit 9 may increase the rotation speed of the compressor 16 as the difference between the temperature measured by the temperature measurement device 72 and the temperature measured by the temperature measurement device 71 increases.

The heat medium circuit 8 of the refrigeration cycle device 200 shown in Embodiments 1 to 3 has a heat medium flowing out from the first load-side heat exchanger 1 and a heat medium flowing out from the second load-side heat exchanger 2. and merge at the merge section 31. Then, in the heat medium circuit 8 of the refrigeration cycle device 200 shown in the first to third embodiments, the combined heat medium is branched at the branch part 32, and the heat medium is divided into the first load side heat exchanger 1 and the second load side heat exchanger 1. It flows into the load side heat exchanger 2. Therefore, in the refrigeration cycle apparatus 200 shown in the first and second embodiments that are not provided with the second refrigerant circuit 9, when performing the cooling/heating mixed operation, the Compared to a configuration in which the heat medium returns to the first load-side heat exchanger 1 without merging with the heat medium flowing out from the second load-side heat exchanger 2, the heat medium flowing into the first load-side heat exchanger 1 The temperature difference between the heat medium and the heat medium flowing out from the first load-side heat exchanger 1 becomes large. Similarly, in the refrigeration cycle apparatus 200 shown in the first and second embodiments that are not equipped with the second refrigerant circuit 9, when performing the cooling/heating mixed operation, the Compared to a configuration in which the heat medium returns to the first load-side heat exchanger 1 without merging with the heat medium flowing out from the second load-side heat exchanger 2, the heat medium flowing into the second load-side heat exchanger 2 The temperature difference with the heat medium flowing out from the second load side heat exchanger 2 increases. If the temperature difference between the heat medium flowing into the load-side heat exchanger and the heat medium flowing out from the load-side heat exchanger becomes large, it may cause a decrease in the performance of the heat medium circuit 8.

On the other hand, when the refrigeration cycle device 200 according to the third embodiment including the second refrigerant circuit 9 executes the cooling/heating mixed operation, compared to the refrigeration cycle device 200 shown in the first and second embodiments, The temperature difference between the heat medium flowing into the first load-side heat exchanger 1 and the heat medium flowing out from the first load-side heat exchanger 1 can be reduced. Moreover, when the refrigeration cycle device 200 according to the third embodiment including the second refrigerant circuit 9 executes the cooling/heating mixed operation, compared to the refrigeration cycle device 200 shown in the first embodiment and the second embodiment, The temperature difference between the heat medium flowing into the second load-side heat exchanger 2 and the heat medium flowing out from the second load-side heat exchanger 2 can be reduced. Therefore, the refrigeration cycle device 200 according to the third embodiment including the second refrigerant circuit 9 is compared to the refrigeration cycle device 200 shown in the first and second embodiments when performing the cooling/heating mixed operation. , the performance of the heat medium circuit 8 is improved. In other words, the refrigeration cycle device 200 according to the third embodiment including the second refrigerant circuit 9 has improved energy saving performance compared to the refrigeration cycle device 200 shown in the first and second embodiments.

Note that in the cooling/heating mixed operation of the refrigeration cycle device 200, the cooling capacity and the heating capacity may differ. In such a case, it is preferable that the refrigerant flowing out from the user-side heat exchanger 3 operating with the smaller capacity flows into the fifth heat medium pipe 8e and the second heat recovery heat exchanger 12. Thereby, the second heat recovery heat exchanger 12 can be downsized, and the second refrigerant circuit 9 can be downsized. As a result, the energy saving performance of the refrigeration cycle apparatus 200 can be improved while suppressing the enlargement of the refrigeration cycle apparatus 200.

In addition, in the refrigeration cycle device 200 configured such that the heat source side heat exchanger 4 and the second load side heat exchanger 2 are connected in series to the first load side heat exchanger 1 in the cooling/heating mixed operation or the dehumidification operation, By providing the second refrigerant circuit 9, the following effects can be obtained. Specifically, in the refrigeration cycle device 200 having such a configuration, a heat exchanger having a smaller heat exchange capacity than the first load-side heat exchanger 1 is used as the second load-side heat exchanger 2. At this time, the second load side heat exchanger 2 and the first heat recovery heat exchanger 11 of the second refrigerant circuit 9 perform the same function by operating the second refrigerant circuit 9. The heat exchange capacity of the side heat exchanger 2 can be supplemented by the first heat recovery heat exchanger 11.

Embodiment 4.
The mounting of each configuration of the heat medium circuit 8 on the unit is not limited to the examples shown in Embodiments 1 to 4. Each component of the heat medium circuit 8 may be mounted on a unit as in this embodiment. Note that matters not specifically mentioned in the fourth embodiment are the same as in any of the first to third embodiments. In addition, in this fourth embodiment, the same reference numerals as those in any of the first to third embodiments are given to components that perform the same functions as those shown in any of the first to third embodiments. I will attach it.

7 to 10 are refrigerant circuit diagrams showing an example of a refrigeration cycle device according to the fourth embodiment.
In the refrigeration cycle device 200 according to the fourth embodiment, a part of the heat medium circuit 8 is mounted on the heat source unit 201, a user side heat exchanger 3 is mounted on the heat load unit 202, and a part of the heat medium circuit 8 is mounted on the heat source unit 201. is mounted on the relay unit 203. Specifically, the heat source unit 201 includes a first load-side heat exchanger 1, a second load-side heat exchanger 2, a pump 6, and a branch section 32. A merging section 31 is mounted on the relay unit.

For example, it is desired to reduce the amount of fluorocarbon-based refrigerants that are generally used in refrigerant circuits. In such a case, by mounting the first refrigerant circuit 7 on the heat source unit 201, the length of the first refrigerant circuit 7 can be reduced, and the amount of the first refrigerant charged into the first refrigerant circuit 7 can be reduced. At this time, if components other than the first load-side heat exchanger 1 and the second load-side heat exchanger 2 of the heat medium circuit 8 are installed in the relay unit 203, the heat source unit 201 and the relay unit 203 are connected. The number of heat medium pipes in the heat medium circuit 8 becomes four. On the other hand, by mounting each configuration of the heat medium circuit 8 on the heat source unit 201 and the relay unit 203 as in the fourth embodiment, the heat medium piping of the heat medium circuit 8 that connects the heat source unit 201 and the relay unit 203 is can be made into three pieces. Therefore, by mounting each component of the heat medium circuit 8 on the heat source unit 201 and the relay unit 203 as in the fourth embodiment, the installation space of the refrigeration cycle device 200 can be reduced.

In the first to fourth embodiments, the refrigeration cycle device 200 has been described above. However, the refrigeration cycle device 200 described in Embodiments 1 to 4 is merely an example of the refrigeration cycle device according to the present disclosure. For example, the refrigeration cycle device according to the present disclosure has a configuration in which the refrigeration cycle device 200 described in Embodiments 1 to 4 is combined with known techniques not described in Embodiments 1 to 4. It may be. Further, for example, the refrigeration cycle device according to the present disclosure may have a configuration in which a part of the configuration of the refrigeration cycle device 200 described in Embodiments 1 to 4 is omitted or changed without departing from the gist of the present disclosure. It may be.

1 First load side heat exchanger, 2 Second load side heat exchanger, 3 Utilization side heat exchanger, 4 Heat source side heat exchanger, 5 Air blower, 6 Pump, 7 First refrigerant circuit, 8 Heat medium circuit, 8a First heat medium pipe, 8b Second heat medium pipe, 8c Third heat medium pipe, 8d Fourth heat medium pipe, 8e Fifth heat medium pipe, 9 Second refrigerant circuit, 11 First heat recovery heat exchanger, 12 2nd heat recovery heat exchanger, 14 compressor, 16 compressor, 17 expansion device, 18 expansion device, 20 expansion device, 21 1st expansion device, 22 2nd expansion device, 31 merging section, 32 branching section, 33 merging section Part, 34 Branching part, 41 Flow path switching device, 42 Flow path switching device, 43 Flow path switching device, 45 Flow path switching device, 51 Switching device, 52 Switching device, 53 Switching device, 54 Switching device, 60 First flow rate Adjustment unit, 61 Flow rate adjustment device, 62 Flow rate adjustment device, 65 Second flow rate adjustment unit, 66 Flow rate adjustment device, 67 Flow rate adjustment device, 71 Temperature measurement device, 72 Temperature measurement device, 200 Refrigeration cycle device, 201 Heat source unit, 202 heat load unit, 203 relay unit, 210 control device.

Claims (8)

a plurality of load-side heat exchangers that exchange heat between a first refrigerant and a heat medium different from the first refrigerant;
a plurality of user-side heat exchangers into which the heat medium supplied from at least one of the load-side heat exchangers flows;
and a heat medium circuit in which the heat medium circulates,
One of the load-side heat exchangers is a first load-side heat exchanger,
One of the usage-side heat exchangers into which the heat medium supplied from the first load-side heat exchanger flows is a first usage-side heat exchanger,
Among the load-side heat exchangers, one of the load-side heat exchangers that supplies the heat medium at a temperature different from that of the heat medium supplied by the first load-side heat exchanger is connected to the second load-side heat exchanger. As a heat exchanger,
Among the usage-side heat exchangers other than the first usage-side heat exchanger, the heat medium has a temperature different from that of the heat medium supplied from the second load-side heat exchanger and supplied to the first usage-side heat exchanger. When one of the user-side heat exchangers into which the heat medium flows is set as a second user-side heat exchanger,
The heat medium circuit is
a merging section for merging the heat medium flowing out from the first usage-side heat exchanger and the heat medium flowing out from the second usage-side heat exchanger;
A first heat medium pipe through which the heat medium flowing out from the confluence part flows is connected to a second heat medium pipe connected to the first load-side heat exchanger and a third heat medium pipe connected to the second load-side heat exchanger. a branching section that branches into a heat medium pipe and connects the first load-side heat exchanger and the second load-side heat exchanger in parallel;
a pump provided between the merging part and the branching part, sucking the heat medium that has joined at the merging part and discharging it toward the branching part to circulate the heat medium;
A refrigeration cycle device equipped with The refrigeration cycle device according to claim 1, further comprising a first refrigerant circuit that includes the first load-side heat exchanger and the second load-side heat exchanger, and in which the first refrigerant circulates. The first refrigerant circuit is
a heat source side heat exchanger;
a first throttle device provided between the heat source side heat exchanger and the first load side heat exchanger;
a second throttle device provided between the first load-side heat exchanger and the second load-side heat exchanger;
Equipped with
The refrigeration cycle device according to claim 2, wherein the first load-side heat exchanger and the second load-side heat exchanger are connected in series to the heat source-side heat exchanger. The first refrigerant circuit is
Equipped with a heat exchanger on the heat source side,
When both the first load-side heat exchanger and the second load-side heat exchanger function as radiators, and when both the first load-side heat exchanger and the second load-side heat exchanger evaporate, The refrigeration cycle device according to claim 2, wherein the first load-side heat exchanger and the second load-side heat exchanger are connected in parallel to the heat source-side heat exchanger. The first refrigerant circuit is
Equipped with a heat exchanger on the heat source side,
The first load-side heat exchanger functions as one of a radiator and an evaporator, and the heat source-side heat exchanger and the second load-side heat exchanger function as the other of a radiator and an evaporator. The refrigeration cycle device according to claim 2 or 4, wherein the heat source side heat exchanger and the second load side heat exchanger are connected in parallel to the first load side heat exchanger. The heat medium inlet of the first user-side heat exchanger and the heat medium inlet of the second user-side heat exchanger are the same as the heat medium outlet of the first load-side heat exchanger and the heat medium inlet of the first user-side heat exchanger. connected to the outlet of the heat medium of the second load-side heat exchanger,
The heat medium circuit is
a flow rate of the heat medium supplied from the first load-side heat exchanger to the heat medium inflow side of the first use-side heat exchanger and the heat medium inflow side of the second use-side heat exchanger; The refrigeration cycle device according to any one of claims 1 to 4 , further comprising: a first flow rate adjustment section that adjusts the flow rate of the heat medium supplied from the second load-side heat exchanger. . The heat medium circuit is
The heat medium outlet of the first usage-side heat exchanger and the heat medium outlet of the second usage-side heat exchanger are connected to a fourth heat medium pipe connected to the merging part and the merging part. It is connected to the connected fifth heat medium pipe,
a flow rate of the heat medium flowing into the fourth heat medium piping on the outflow side of the heat medium of the first usage-side heat exchanger and the outflow side of the heat medium of the second usage-side heat exchanger; a second flow rate adjustment section that adjusts the flow rate of the heat medium flowing into the fifth heat medium pipe;
The refrigeration cycle device includes a second refrigerant circuit in which a second refrigerant circulates,
The second refrigerant circuit is
a first heat recovery heat exchanger that is provided between the heat medium outlet of the second load-side heat exchanger and the second usage-side heat exchanger and exchanges heat between the second refrigerant and the heat medium; The vessel and
a second heat recovery heat exchanger that exchanges heat between the heat medium flowing through the fifth heat medium pipe and the second refrigerant;
Equipped with
When one of the first heat recovery heat exchanger and the second heat recovery heat exchanger functions as a radiator, the other of the first heat recovery heat exchanger and the second heat recovery heat exchanger The refrigeration cycle device according to any one of claims 1 to 4 , wherein the refrigeration cycle device is configured to function as an evaporator. a heat source unit in which a part of the heat medium circuit is mounted;
a relay unit that connects the heat load unit in which the user-side heat exchanger is mounted and the heat source unit, and in which a part of the heat medium circuit is mounted;
Equipped with
The heat source unit is equipped with the first load-side heat exchanger, the second load-side heat exchanger, the pump, and the branch section,
The refrigeration cycle device according to any one of claims 1 to 4 , wherein the relay unit includes the merging section.

Images