CN115803571A - Refrigeration cycle device - Google Patents

Abstract

The refrigeration cycle device is provided with a compressor (10), a 1 st heat exchanger (20), a pressure reduction device (30), a 2 nd heat exchanger (40), a 1 st switching valve (60), a 2 nd switching valve (70), and a control device. The 1 st switching valve is switched to any one of a 1 st state in which the 1 st heat exchanger is connected to the discharge port of the compressor and a 2 nd state in which the 2 nd heat exchanger is connected to the discharge port of the compressor. The 2 nd switching valve is switched to any one of a 3 rd state in which the suction port of the compressor is connected to the 2 nd heat exchanger, a 4 th state in which the suction port of the compressor is connected to the 1 st heat exchanger, and a 5 th state in which the suction port of the compressor is connected to the decompression device. When a request for switching to a 2 nd cooling operation in which a 1 st switching valve and a 2 nd switching valve are set to a 2 nd state and a 4 th state, respectively, is made during a 1 st cooling operation in which the 1 st switching valve and the 2 nd switching valve are set to the 1 st state and the 3 rd state, respectively, a control device performs the 1 st switching operation in which the 1 st switching valve is set to the 2 nd state and the 2 nd switching valve is set to the 5 th state, and then switches to the 2 nd cooling operation.

Description

Refrigeration cycle device

technical field

The present disclosure relates to refrigeration cycle devices.

Background technique

In Japanese Unexamined Patent Application Publication No. 2005-134099 (Patent Document 1), a refrigeration cycle device including a refrigerant circuit including a compressor, a first heat exchanger, a decompression device, a second heat exchanger, and a second heat exchanger is disclosed. Exchangers, and flow path switching valves. In this refrigeration cycle device, the first operation and the second operation can be switched by switching the state of the flow path switching valve. In the sequential cycle of the 2 heat exchangers, in the 2nd operation, the refrigerant is circulated in the order of the compressor, the 2nd heat exchanger, the decompression device, and the 1st heat exchanger.

prior art literature

patent documents

Patent Document 1: Japanese Patent Laid-Open No. 2005-134099

Contents of the invention

The problem to be solved by the invention

The pressure distribution of the refrigerant differs between the first operation and the second operation described above. Specifically, in the first operation, the high-pressure refrigerant is distributed in the first heat exchanger and the low-pressure refrigerant is distributed in the second heat exchanger. On the other hand, in the second operation, the high-pressure refrigerant is distributed. In the state of the second heat exchanger and the low-pressure refrigerant is distributed in the first heat exchanger. Therefore, when switching from one of the first operation and the second operation to the other, the pressure distribution of the refrigerant is disrupted, and the time required until the refrigeration cycle stabilizes after the operation switching may become longer due to this influence.

The present disclosure has been made to solve the above-mentioned problems, and its object is to shorten the time required until the refrigeration cycle is stabilized after operation switching in a refrigeration cycle device capable of switching operation between a first operation and a second operation, Wherein, in the first operation, the refrigerant is circulated in the order of the compressor, the first heat exchanger, the decompression device, and the second heat exchanger, and in the second operation, the refrigerant is circulated in the order of the compressor, the second heat exchanger, and the second heat exchanger. Sequential cycle of exchanger, pressure reducing device and first heat exchanger.

means of solving problems

The refrigeration cycle device of the present disclosure can switch operation between the first operation and the second operation. Sequential cycle. In the second operation, the refrigerant is circulated in the order of the compressor, the second heat exchanger, the decompression device, and the first heat exchanger. The refrigeration cycle device is equipped with: a first switching valve, which The discharge port of the machine, one port of the first heat exchanger, one port of the second heat exchanger, and one port of the decompression device are connected; the second switching valve is connected to the suction port of the compressor, the first heat exchanger The other port of the exchanger, the other port of the second heat exchanger, and the other port of the decompression device are connected; and a control device that controls the first switching valve and the second switching valve.

The first switching valve is configured to be switchable to any one of a first state in which the discharge port of the compressor is connected to one port of the first heat exchanger and a second state in which the second heat is exchanged. One port of the pressure reducer is connected to one port of the decompression device. The second state is to connect the discharge port of the compressor to one port of the second heat exchanger, and to connect one port of the first heat exchanger. The state that the port is connected to one port of the decompression device.

The second switching valve is configured to be switchable to any one of the third state, the fourth state, and the fifth state in which the other port of the first heat exchanger is connected to the other port of the decompression device. The fourth state is to connect the other port of the second heat exchanger to the other port of the decompression device , and the state where the other port of the first heat exchanger is connected to the suction port of the compressor, the fifth state is to connect the other port of the decompression device to the suction port of the compressor, and The other port of the exchanger is disconnected from the other port of the second heat exchanger.

The controller sets the first switching valve to the first state and the second switching valve to the third state during the first operation, and sets the first switching valve to the second state and the second switching valve to the second state during the second operation. Set to the 4th state.

When switching to the second operation is requested during the first operation, the control device performs the first switching operation in which the first switching valve is set to the second state and the second switching valve is set to the fifth state. After the 1 switching operation, the operation of the refrigeration cycle apparatus is switched to the 2nd operation.

The effect of the invention

According to the present disclosure, it is possible to shorten the time required until the refrigeration cycle is stabilized after operation switching in a refrigeration cycle device capable of switching between the first operation and the second operation in which refrigeration The refrigerant circulates in the order of the compressor, the first heat exchanger, the decompression device, and the second heat exchanger. Sequential cycle of switches.

Description of drawings

FIG. 1 is a diagram schematically showing an example of an overall configuration of a refrigeration cycle apparatus according to the first embodiment.

Fig. 2 is a perspective view showing an example of an internal structure of a second switching valve.

Fig. 3 is a diagram showing the rotational position of the valve body when the second switching valve is in the third state.

Fig. 4 is a diagram showing the rotational position of the valve body when the second switching valve is in the fourth state.

Fig. 5 is a diagram showing the rotational position of the valve body when the second switching valve is in the fifth state.

Fig. 6 is a diagram (Part 1) showing the state of the refrigerant circuit in the first cooling operation.

Fig. 7 is a diagram (Part 1) showing the state of the refrigerant circuit in the second cooling operation.

Fig. 8 is a diagram (Part 1) showing a state during the first switching operation of the refrigerant circuit.

Fig. 9 is a diagram (Part 1) showing a state during a second switching operation of the refrigerant circuit.

Fig. 10 is a diagram showing an example of transitions in the operating states of the refrigeration cycle apparatus.

Fig. 11 is a diagram (Part 2) showing the state of the refrigerant circuit in the first cooling operation.

Fig. 12 is a diagram (Part 2) showing a state during the first switching operation of the refrigerant circuit.

Fig. 13 is a diagram (Part 2) showing the state of the refrigerant circuit in the second cooling operation.

Fig. 14 is a diagram (part 2) showing a state during the second switching operation of the refrigerant circuit.

Fig. 15 is a diagram (Part 3) showing the state of the refrigerant circuit in the first cooling operation.

Fig. 16 is a diagram (part 3) showing a state during the first switching operation of the refrigerant circuit.

Fig. 17 is a diagram (Part 3) showing the state of the refrigerant circuit in the second cooling operation.

Fig. 18 is a diagram (Part 3) showing a state during the second switching operation of the refrigerant circuit.

Fig. 19 is a diagram (No. 1) showing a configuration example of a first air blower and a second air blower.

Fig. 20 is a diagram (No. 2) showing a configuration example of a first air blower and a second air blower.

Fig. 21 is a diagram (No. 3) showing a configuration example of a first air blower and a second air blower.

Fig. 22 is a diagram (No. 4) showing a configuration example of a first air blower and a second air blower.

Fig. 23 is a diagram (No. 5) showing a configuration example of a first air blower and a second air blower.

Fig. 24 is a diagram (No. 6) showing a configuration example of the first air blower and the second air blower.

Detailed ways

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. Hereinafter, a plurality of embodiments will be described, but it is planned to appropriately combine the configurations described in the respective embodiments from the beginning of the application. In addition, the same reference numerals are assigned to the same or corresponding parts in the drawings, and the description thereof will not be repeated.

Implementation mode 1.

[explanation of the structure]

FIG. 1 is a diagram schematically showing an example of an overall configuration of a refrigeration cycle apparatus 1 according to the first embodiment. The refrigeration cycle device 1 includes a refrigerant circuit RC, a first blower device 80 , a second blower device 90 , and a control device 100 . The refrigerant circuit RC includes a compressor 10 , a first heat exchanger 20 , a decompression device 30 , a second heat exchanger 40 , pipes 51 to 58 , a first switching valve 60 , and a second switching valve 70 .

The refrigerant circuit RC connects the compressor 10 , the first heat exchanger 20 , the decompression device 30 , and the second heat exchanger 40 through the pipes 51 to 58 , the first switching valve 60 , and the second switching valve 70 , thereby, A circulation flow path through which the refrigerant circulates is constituted. Refrigerant with phase change, such as carbon dioxide and R410A, circulates in the refrigerant circuit RC.

The suction port of the compressor 10 is connected to the pipe 58 , and the discharge port of the compressor 10 is connected to the pipe 51 . The compressor 10 sucks and compresses a low-pressure refrigerant from the pipe 58 , and discharges it to the pipe 51 as a high-pressure refrigerant. The rotational speed of the compressor 10 is adjusted according to an instruction from the control device 100 . The compressor 10 discharges refrigerant at a flow rate corresponding to the rotation speed. The refrigerant flow rate circulating in the refrigeration cycle device 1 is controlled by adjusting the rotational speed (discharge flow rate) of the compressor 10 .

Both the first heat exchanger 20 and the second heat exchanger 40 are heat exchangers having a flow path through which the refrigerant flows. In the first heat exchanger 20 and the second heat exchanger 40 , heat is exchanged between the refrigerant and the air outside the flow path through which the refrigerant flows.

The decompression device 30 decompresses the high-pressure refrigerant. As the decompression device 30 , a device having a valve whose opening degree can be adjusted according to an instruction from the control device 100 , such as an electronically controlled expansion valve, can be used.

The first switching valve 60 is a four-way valve having the following ports: a port connected to the discharge port of the compressor 10 through the pipe 51 , a port connected to one port of the first heat exchanger 20 through the pipe 52 , 56 to a port connected to one port of the second heat exchanger 40 , and a port connected to one port of the decompression device 30 via a pipe 55 .

The first switching valve 60 is switched to any one of the first state and the second state according to a command from the control device 100 .

When the first switching valve 60 is in the first state, the pipe 51 is connected to the pipe 52 , and the pipe 56 is connected to the pipe 55 . Thus, the discharge port of the compressor 10 is connected to one port of the first heat exchanger 20 , and one port of the second heat exchanger 40 is connected to one port of the decompression device 30 . In addition, in FIG. 1 , the case where the first switching valve 60 is in the first state is illustrated as an example.

When the first switching valve 60 is in the second state, the pipe 51 is connected to the pipe 56 , and the pipe 52 is connected to the pipe 55 . Thus, the discharge port of the compressor 10 is connected to one port of the second heat exchanger 40 , and one port of the first heat exchanger 20 is connected to one port of the decompression device 30 .

The second switching valve 70 is a four-way valve having the following ports: a port connected to the suction port of the compressor 10 through the pipe 58 , a port connected to the other port of the first heat exchanger 20 through the pipe 53 , The port connected to the other port of the second heat exchanger 40 via the pipe 57 , and the port connected to the other port of the decompression device 30 via the pipe 54 .

The second switching valve 70 is switched to any one of the third state, the fourth state, and the fifth state according to an instruction from the control device 100 .

When the second switching valve 70 is in the third state, the pipe 53 is connected to the pipe 54 , and the pipe 57 is connected to the pipe 58 . Accordingly, the other port of the first heat exchanger 20 is connected to the other port of the decompression device 30 , and the other port of the second heat exchanger 40 is connected to the suction port of the compressor 10 . In addition, in FIG. 1 , the case where the second switching valve 70 is in the third state is illustrated as an example.

When the second switching valve 70 is in the fourth state, the pipe 57 is connected to the pipe 54 , and the pipe 53 is connected to the pipe 58 . Accordingly, the other port of the second heat exchanger 40 is connected to the other port of the decompression device 30 , and the other port of the first heat exchanger 20 is connected to the suction port of the compressor 10 .

When the second switching valve 70 is in the fifth state, the pipe 54 and the pipe 58 are connected, and the pipe 53 and the pipe 57 are disconnected. As a result, the suction port of the compressor 10 is connected to the other port of the decompression device 30 , and the other port of the first heat exchanger 20 is disconnected from the other port of the second heat exchanger 40 .

FIG. 2 is a perspective view showing an example of the internal structure of the second switching valve 70 . The second switching valve 70 has a hollow cylindrical container 71 forming four ports respectively connected to the pipes 53 , 54 , 57 , and 58 , and a cylindrical valve body 72 housed in the container 71 . The valve body 72 is configured to be rotatable around a rotation shaft 76 in accordance with an instruction from the control device 100 .

FIG. 3 is a diagram showing the rotational position of the valve body 72 when the second switching valve 70 is in the third state. FIG. 4 is a diagram showing the rotational position of the valve body 72 when the second switching valve 70 is in the fourth state. FIG. 5 is a diagram showing the rotational position of the valve body 72 when the second switching valve 70 is in the fifth state.

As shown in FIGS. 3 to 5 , three independent flow paths 73 , 74 , and 75 are formed inside the valve body 72 . When the second switching valve 70 is in the third state, as shown in FIG. And connect. Accordingly, the other port of the first heat exchanger 20 is connected to the other port of the decompression device 30 , and the other port of the second heat exchanger 40 is connected to the suction port of the compressor 10 .

When the second switching valve 70 is in the fourth state, as shown in FIG. And connect. Accordingly, the other port of the second heat exchanger 40 is connected to the other port of the decompression device 30 , and the other port of the first heat exchanger 20 is connected to the suction port of the compressor 10 .

When the second switching valve 70 is in the fifth state, as shown in FIG. As a result, the suction port of the compressor 10 is connected to the other port of the decompression device 30 , and the other port of the first heat exchanger 20 is disconnected from the other port of the second heat exchanger 40 .

Returning to FIG. 1 , the first air blower 80 is configured to be able to blow air on the indoor side (hereinafter, also simply referred to as "room air") to be cooled in accordance with a command from the control device 100 . In addition, the first blower device 80 is configured to be able to switch the blowing destination of the indoor air between the first heat exchanger 20 and the second heat exchanger 40 .

The second air blower 90 is configured to be able to blow the outdoor air (hereinafter, also simply referred to as "outdoor air") that is not a cooling target in accordance with an instruction from the control device 100 . In addition, the second blower device 90 is configured to be able to switch the blowing destination of outdoor air between the first heat exchanger 20 and the second heat exchanger 40 .

The control device 100 is configured to include a CPU (Central Processing Unit: Central Processing Unit), a memory, and input/output ports for inputting and outputting various signals. The control device 100 controls each device (compressor 10, pressure reducing device 30, first switching valve 60, second switching valve 70, etc.) , the first blower 80, the second blower 90, etc.) control. In addition, the control performed by the control device 100 is not limited to processing by software, and processing may be performed by dedicated hardware (electronic circuit).

[1st cooling operation and 2nd cooling operation]

In the refrigeration cycle apparatus 1 , switching between the first cooling operation and the second cooling operation can be performed by switching the states of the first switching valve 60 and the second switching valve 70 .

FIG. 6 is a diagram showing a state of the refrigerant circuit RC during the first cooling operation. In the first cooling operation, the controller 100 operates the compressor 10 , sets the first switching valve 60 to the first state, and sets the second switching valve 70 to the third state.

In the first cooling operation, the refrigerant circulates in the order of the compressor 10, the first heat exchanger 20, the decompression device 30, and the second heat exchanger 40, so the first heat exchanger 20 functions as a condenser , the second heat exchanger 40 functions as an evaporator. More specifically, the high-temperature and high-pressure refrigerant discharged from the compressor 10 flows into the first heat exchanger 20 through the first switching valve 60 . The high-temperature and high-pressure refrigerant exchanges heat with the outside air in the first heat exchanger 20 , and flows out of the first heat exchanger 20 after the temperature drops. The refrigerant flowing out of the first heat exchanger 20 is decompressed by the decompression device 30 to become a low-temperature and low-pressure refrigerant, and then flows into the second heat exchanger 40 . The low-temperature and low-pressure refrigerant exchanges heat with the outside air in the second heat exchanger 40 , and flows out of the second heat exchanger 40 after rising in temperature. The refrigerant flowing out of the second heat exchanger 40 is sucked into the compressor 10 through the second switching valve 70 .

Therefore, in the first cooling operation, the high-pressure refrigerant is distributed in the pipes 51 and 52, the first heat exchanger 20, and the pipes 53 and 54, and the low-pressure refrigerant is distributed in the pipes 55 and 56 and the second heat exchanger. In the heat exchanger 40 and the pipes 57 and 58 .

In addition, in the first cooling operation, the control device 100 controls the first blower device 80 and the second blower device 90 so that the blowing destination of the indoor air is the second heat exchanger 40 and the outdoor air is sent to the second heat exchanger 40 . The air blowing destination is set to the first heat exchanger 20 . As a result, the heat exchange between the first heat exchanger 20 functioning as a condenser and the outside air not to be cooled is promoted, and the second heat exchanger 40 functioning as an evaporator is promoted to the outside air which is not to be cooled. Heat exchange between indoor air. Accordingly, the room air to be cooled can be efficiently cooled. In addition, in above-mentioned FIG. 1, the state in the 1st cooling operation is shown as an example.

FIG. 7 is a diagram showing a state of the refrigerant circuit RC during the second cooling operation. In the second cooling operation, the controller 100 operates the compressor 10 , sets the first switching valve 60 to the second state, and sets the second switching valve 70 to the fourth state.

In the second cooling operation, the refrigerant circulates in the order of the compressor 10, the second heat exchanger 40, the decompression device 30, and the first heat exchanger 20, so the second heat exchanger 40 functions as a condenser. Functionally, the first heat exchanger 20 functions as an evaporator. More specifically, the high-temperature and high-pressure refrigerant discharged from the compressor 10 flows into the second heat exchanger 40 through the first switching valve 60 . The high-temperature and high-pressure refrigerant exchanges heat with the outside air in the second heat exchanger 40 , and flows out of the second heat exchanger 40 after the temperature drops. The refrigerant flowing out of the second heat exchanger 40 is decompressed by the decompression device 30 to become a low-temperature and low-pressure refrigerant, and then flows into the first heat exchanger 20 . The low-temperature and low-pressure refrigerant exchanges heat with the outside air in the first heat exchanger 20 , and flows out of the first heat exchanger 20 after rising in temperature. The refrigerant flowing out of the first heat exchanger 20 is sucked into the compressor 10 through the second switching valve 70 .

Therefore, in the second cooling operation, the high-pressure refrigerant is distributed in the pipes 51, 56, the second heat exchanger 40, and the pipes 57, 54, and the low-pressure refrigerant is distributed in the pipes 55, 52, and the second heat exchanger. 1 in the heat exchanger 20 and the pipes 53 and 58.

In addition, in the second cooling operation, the control device 100 controls the first air blowing device 80 and the second air blowing device 90 so that the first heat exchanger 20 is the blowing destination of the indoor air and the outdoor air The air blowing destination is set to the second heat exchanger 40 . Thereby, the heat exchange between the second heat exchanger 40 functioning as a condenser and the outdoor air not to be cooled is promoted, and the heat exchange between the first heat exchanger 20 functioning as an evaporator and the outdoor air not to be cooled is promoted. heat exchange between indoor air. Thereby, also in the second cooling operation, it is possible to efficiently cool the indoor air to be cooled.

In the first cooling operation, for example, when the temperature of the refrigerant in the second heat exchanger 40 functioning as an evaporator is 0° C. or lower, frost adheres to the second heat exchanger 40 and makes it difficult for wind to pass through. 2 The heat exchange efficiency in the heat exchanger 40 may deteriorate. Therefore, in the first cooling operation, when frost is attached to the second heat exchanger 40 (for example, when the temperature of the refrigerant in the second heat exchanger 40 detected by a sensor not shown in the figure is lower than 0 °C), the control device 100 determines that switching to the second cooling operation is requested, and switches to the second cooling operation. Thereby, the second heat exchanger 40 functioning as an evaporator functions as a condenser, and therefore, frost adhering to the second heat exchanger 40 can be removed.

In addition, in the present embodiment, in the second cooling operation, the blowing destination of the room air is set to the first heat exchanger 20 functioning as an evaporator, and therefore, also in the second cooling operation, it can be sent to Air-conditioning is delivered to the indoor side.

In the second cooling operation, when there is a situation in which frost adheres to the first heat exchanger 20 functioning as a condenser (for example, when the first heat exchanger 20 is detected by a sensor not shown). When the agent temperature is lower than the reference value around 0° C.), the control device 100 determines that switching to the first cooling operation is requested, and switches to the first cooling operation. Thereby, the first heat exchanger 20 functioning as an evaporator functions as a condenser, and therefore, frost adhering to the first heat exchanger 20 can be removed.

[1st switching operation and 2nd switching operation]

As described above, in the first cooling operation, the high-pressure refrigerant is distributed in the first heat exchanger 20 and the low-pressure refrigerant is distributed in the second heat exchanger 40. On the other hand, in the second cooling operation, the state is high-pressure cooling. The refrigerant is distributed in the second heat exchanger 40 and the low-pressure refrigerant is distributed in the first heat exchanger 20 . Therefore, when switching from one of the first cooling operation and the second cooling operation to the other, the pressure distribution of the refrigerant is disrupted, and the time required until the refrigeration cycle is stabilized after the operation switching may become longer due to this influence.

In view of such a problem, the control device 100 of the present embodiment, when switching to the second cooling operation is requested during the first cooling operation, sets the first switching valve 60 to the second state and sets the second switching valve 70 to the second state. In the "first switching operation" set to the fifth state, the operation of the refrigeration cycle apparatus 1 is switched to the second cooling operation after the first switching operation has been performed for a certain period of time.

FIG. 8 is a diagram showing a state during the first switching operation of the refrigerant circuit RC. As shown in FIG. 8 , in the first switching operation, the control device 100 operates the compressor 10 , sets the first switching valve 60 to the second state, and sets the second switching valve 70 to the fifth state.

By performing the first switching operation before switching from the first cooling operation to the second cooling operation, the refrigerant in the first heat exchanger 20 that has become high pressure during the first cooling operation can be recovered to the compressor 10 to make the first cooling operation more stable. 1. The inside of the heat exchanger 20 is at a low pressure, and the high-pressure refrigerant from the compressor 10 can be supplied to the second heat exchanger 40, which is at a low pressure during the first cooling operation, so that the inside of the second heat exchanger 40 can be at a high pressure. state. That is, before switching to the second cooling operation, the inside of the first heat exchanger 20 can be brought into a low-pressure state, and the inside of the second heat exchanger 40 can be brought into a high-pressure state in advance.

Especially in the first switching operation, by the second switching valve 70 being in the fifth state, the other port of the first heat exchanger 20 and the other port of the second heat exchanger 40 are controlled by the second switching valve 70. cut off. Accordingly, it is possible to prevent the high-pressure refrigerant and the low-pressure refrigerant from being mixed and equalized. Therefore, compared with the case of simply switching from the first cooling operation to the second cooling operation, the inside of the first heat exchanger 20 can be brought to a low-pressure state earlier, and the inside of the second heat exchanger 40 can be brought to a high-pressure state earlier.

In addition, in the first switching operation, the control device 100 stops the air blowing by the first air blowing device 80 and the second air blowing device 90 . Thus, in the first switching operation, the air blowing to the first heat exchanger 20 and the second heat exchanger 40 is stopped, so that the inside of the first heat exchanger 20 can be brought into a low-pressure state earlier, and the second 2. The inside of the heat exchanger 40 becomes a high-pressure state earlier.

The control device 100 switches the operation of the refrigeration cycle device 1 to the second cooling operation after performing the first switching operation for a certain period of time. Therefore, the time required until the refrigeration cycle stabilizes after switching to the second cooling operation can be shortened.

In addition, the control device 100 of the present embodiment performs switching of the first switching valve 60 to the first state and setting of the second switching valve 70 to the first state when a switch to the first cooling operation is requested during the second cooling operation. In the "second switching operation" of the 5 state, switching to the first cooling operation is performed after the second switching operation has been performed for a certain period of time.

FIG. 9 is a diagram showing a state during the second switching operation of the refrigerant circuit RC. As shown in FIG. 9 , in the second switching operation, the controller 100 operates the compressor 10 , sets the first switching valve 60 to the first state, and sets the second switching valve 70 to the fifth state.

By performing the second switching operation before switching from the second cooling operation to the first cooling operation, the refrigerant in the second heat exchanger 40 that has become high pressure during the second cooling operation can be recovered to the compressor 10 to make the The inside of the second heat exchanger 40 is in a low-pressure state, and the high-pressure refrigerant from the compressor 10 can be supplied to the first heat exchanger 20 which has a low pressure in the second cooling operation, so that the inside of the first heat exchanger 20 can be brought to a low pressure state. High pressure state. That is, before switching to the first cooling operation, the inside of the second heat exchanger 40 can be brought into a low-pressure state, and the inside of the first heat exchanger 20 can be brought into a high-pressure state in advance.

Especially in the second switching operation, by the second switching valve 70 being in the fifth state, the other port of the first heat exchanger 20 and the other port of the second heat exchanger 40 are controlled by the second switching valve 70. cut off. Accordingly, it is possible to prevent the high-pressure refrigerant and the low-pressure refrigerant from being mixed and equalized. Therefore, it is possible to bring the inside of the second heat exchanger 40 to a low-pressure state as soon as possible, and to make the inside of the first heat exchanger 20 to a high-pressure state as soon as possible.

In addition, in the second switching operation, the control device 100 stops the air blowing by the first air blowing device 80 and the second air blowing device 90 . Thus, in the second switching operation, the air blowing to the first heat exchanger 20 and the second heat exchanger 40 is stopped, so that the inside of the second heat exchanger 40 can be brought into a low-pressure state earlier, and the first 1 The inside of the heat exchanger 20 becomes a high-pressure state earlier.

The control device 100 switches the operation of the refrigeration cycle device 1 to the first cooling operation after performing the second switching operation for a certain period of time. Therefore, the time required until the refrigeration cycle stabilizes after switching to the first cooling operation can be shortened.

FIG. 10 is a diagram showing an example of the transition of the operating state of the refrigeration cycle apparatus 1 controlled by the control device 100 . In FIG. 10, the horizontal axis represents time, and the vertical axis sequentially represents the state of the compressor 10, the state of the first switching valve 60, the state of the second switching valve 70, the blowing destination of indoor air, and the flow of outdoor air in sequence from the top. Air destination.

Before time t1, the first cooling operation is performed. In the first cooling operation, the control device 100 sets the first switching valve 60 to the first state, and sets the second switching valve 70 to the third state. Furthermore, the control device 100 controls the first air blower 80 so that the blowing destination of the indoor air becomes the second heat exchanger 40, and controls the second blower 90 so that the blowing destination of the outdoor air becomes the second heat exchanger 40. 1 heat exchanger 20 .

When switching to the second cooling operation is requested at time t1 during the first cooling operation, the control device 100 switches the operation of the refrigeration cycle apparatus 1 from the first cooling operation to the first switching operation. Specifically, the control device 100 switches the first switching valve 60 from the first state to the second state, and switches the second switching valve 70 from the third state to the fifth state. Furthermore, the control device 100 stops the blowing of indoor air by the first blower device 80 and stops the blowing of outdoor air by the second blower device 90 .

At time t2 after a certain period of time has elapsed since the start of the first switching operation, the control device 100 switches the operation of the refrigeration cycle apparatus 1 from the first switching operation to the second cooling operation. Specifically, the control device 100 maintains the first switching valve 60 in the second state, and switches the second switching valve 70 from the fifth state to the fourth state. In addition, the control device 100 controls the first air blower 80 so as to switch the blowing destination of the indoor air from the second heat exchanger 40 to the first heat exchanger 20 , and controls the second air blower 90 , so that the blowing destination of the outdoor air is switched from the first heat exchanger 20 to the second heat exchanger 40 .

When switching to the first cooling operation is requested at time t3 during the second cooling operation, the control device 100 switches the operation of the refrigeration cycle device 1 from the second cooling operation to the second switching operation. Specifically, the control device 100 switches the first switching valve 60 from the second state to the first state, and switches the second switching valve 70 from the fourth state to the fifth state. Furthermore, the control device 100 stops the blowing of indoor air by the first blower device 80 and stops the blowing of outdoor air by the second blower device 90 .

At time t4 after a certain period of time has elapsed since the start of the second switching operation, the control device 100 switches the operation of the refrigeration cycle apparatus 1 from the second switching operation to the first cooling operation. Specifically, the control device 100 maintains the first switching valve 60 in the first state, and switches the second switching valve 70 from the fifth state to the third state. In addition, the control device 100 controls the first air blower 80 so as to switch the blowing destination of the indoor air from the first heat exchanger 20 to the second heat exchanger 40 , and controls the second air blower 90 , so that the blowing destination of the outdoor air is switched from the second heat exchanger 40 to the first heat exchanger 20 .

After time t5, the same switching as up to time t5 is performed.

As described above, when switching to the second cooling operation is requested during the first cooling operation, the control device 100 of the present embodiment sets the first switching valve 60 for a certain period of time before switching to the second cooling operation. It is the second state and the "first switching operation" in which the second switching valve 70 is in the fifth state. Thereby, compared with the case of simply switching from the first cooling operation to the second cooling operation, it is possible to prevent the high-pressure refrigerant and the low-pressure refrigerant from being mixed and equalized at the time of operation switching, and it is possible to form an air conditioner close to the second cooling operation in advance. The state of the pressure distribution of the 2 cooling operation is then switched to the 2nd cooling operation. Therefore, the time required until the refrigeration cycle stabilizes after switching to the second cooling operation can be shortened. As a result, it is possible to reduce wasteful energy consumed for stabilizing the refrigeration cycle after switching to the second cooling operation, and energy saving of the refrigeration cycle apparatus 1 can be achieved.

In addition, the control device 100 of the present embodiment, when switching to the first cooling operation is requested during the second cooling operation, sets the first switching valve 60 to the first cooling operation for a certain period of time before switching to the first cooling operation. 1 state and the "second switching operation" in which the second switching valve 70 is set to the fifth state. As a result, compared with the case of simply switching from the second cooling operation to the first cooling operation, it is possible to prevent the high-pressure refrigerant and the low-pressure refrigerant from mixing and equalizing the pressure during the operation switching, and to form a pressure close to the first cooling operation in advance. The state of the pressure distribution of the cooling operation is switched to the first cooling operation thereafter. Therefore, the time required until the refrigeration cycle stabilizes after switching to the first cooling operation can be shortened. As a result, it is possible to reduce wasteful energy consumed to stabilize the refrigeration cycle after switching to the first cooling operation, and energy saving of the refrigeration cycle apparatus 1 can be achieved.

Implementation mode 2.

An example of the configuration of the refrigerant circuit RCa of the refrigeration cycle apparatus according to Embodiment 2 is schematically shown in FIGS. 11 to 14 . In the refrigerant circuit RCa of the second embodiment, the decompression device 32 and the third heat exchanger 42 are added to the refrigerant circuit RC of the first embodiment described above. Other configurations of the refrigerant circuit RCa are the same as those of the refrigerant circuit RC. In addition, other configurations and operations of the refrigeration cycle apparatus according to Embodiment 2 are the same as those of the refrigeration cycle apparatus 1 shown in FIG. 1 described above.

The decompression device 32 and the third heat exchanger 42 are arranged between the second switching valve 70 and the suction port of the compressor 10 .

The decompression device 32 decompresses the refrigerant from the second switching valve 70 and outputs it to the third heat exchanger 42 . As the decompression device 32 , a device having a valve whose opening degree can be adjusted according to an instruction from the control device 100 can be used, for example, an electronically controlled expansion valve can be used.

The third heat exchanger 42 exchanges heat between the refrigerant decompressed by the decompression device 32 and the outside air.

FIG. 11 is a diagram showing a state of the refrigerant circuit RCa during the first cooling operation. FIG. 12 is a diagram showing a state during the first switching operation of the refrigerant circuit RCa. FIG. 13 is a diagram showing a state in the second cooling operation of the refrigerant circuit RCa. FIG. 14 is a diagram showing a state during the second switching operation of the refrigerant circuit RCa.

The states of compressor 10 , first switching valve 60 , second switching valve 70 , first air blower 80 , and second air blower 90 in operation are basically controlled in the same manner as in Embodiment 1 described above.

However, in the refrigerant circuit RCa according to Embodiment 2, since the decompression device 32 is added, in each operation, the high-pressure refrigerant is distributed from the discharge port of the compressor 10 to the decompression device 30 . In the circuit, the intermediate pressure refrigerant is distributed in the circuit from the decompression device 30 to the decompression device 32 , and the low pressure refrigerant is distributed in the circuit from the decompression device 32 to the suction port of the compressor 10 .

In addition, as shown in FIG. 11 , the refrigerant circuit RCa of Embodiment 2 is configured to blow indoor air in the order of the second heat exchanger 40 and the third heat exchanger 42 during the first cooling operation. That is, in the first cooling operation, when the second heat exchanger 40 and the third heat exchanger 42 function as evaporators, room air is blown to the third heat exchanger 42 after passing through the second heat exchanger 40 .

Thus, in Embodiment 2, in the first cooling operation, indoor air is blown from the second heat exchanger 40 to the third heat exchanger 42 in this order. Therefore, in the second heat exchanger 40 and the third heat exchanger 42 that function as evaporators in the first cooling operation (that is, on which frost may adhere), frost can be positively attached to the heat exchanger before switching to the second cooling operation. The second heat exchanger 40 functioning as a condenser prevents frost from adhering to the third heat exchanger 42 functioning also as an evaporator after switching to the second cooling operation. As a result, when defrosting is performed by switching to the second cooling operation thereafter, only the second heat exchanger 40 with a lot of frost can be defrosted, so that efficient defrosting operation can be performed.

In addition, as shown in FIG. 13 , the refrigerant circuit RCa of the second embodiment blows indoor air in the order of the first heat exchanger 20 and the third heat exchanger 42 in the second cooling operation. That is, in the second cooling operation, when the first heat exchanger 20 and the third heat exchanger 42 function as evaporators, room air is blown to the third heat exchanger after passing through the first heat exchanger 20 42.

Thus, in the second embodiment, in the second cooling operation, the indoor air is blown from the first heat exchanger 20 to the third heat exchanger 42 in this order. Therefore, in the first heat exchanger 20 and the third heat exchanger 42 that function as evaporators in the second cooling operation (that is, on which frost may adhere), frost can be positively attached to the heat exchanger before switching to the first cooling operation. The first heat exchanger 20 functioning as a condenser is less likely to cause frost to adhere to the third heat exchanger 42 also functioning as an evaporator after switching to the first cooling operation. As a result, when switching to the first cooling operation for defrosting thereafter, only the first heat exchanger 20 to which a large amount of frost is deposited can be defrosted, so that efficient defrosting operation can be performed.

In addition, in the refrigerant circuit RCa of the second embodiment, an adsorbent (a desiccant material, etc.) that adsorbs moisture in the air may be coated in advance on the surfaces of the first heat exchanger 20 and the second heat exchanger 40 . As a result, moisture in the air is adsorbed by the first heat exchanger 20 or the second heat exchanger 40 , and therefore, it is possible to prevent frost from adhering to the third heat exchanger 42 .

For example, in the second cooling operation in which the first heat exchanger 20 functions as an evaporator, moisture in the indoor air is adsorbed by the adsorbent of the first heat exchanger 20 when passing through the first heat exchanger 20 , and therefore, The indoor air blown to the third heat exchanger 42 after passing through the first heat exchanger 20 is in a dry state. As a result, it is possible to prevent frost from adhering to the third heat exchanger 42 .

In addition, after switching to the first cooling operation and making the first heat exchanger 20 function as a condenser, moisture contained in the adsorbent of the first heat exchanger 20 can be released into the outdoor air. As a result, the adsorbent in the first heat exchanger 20 is dried. Therefore, when switching to the second cooling operation again to make the first heat exchanger 20 function as an evaporator, the adsorption capacity of the first heat exchanger 20 can be reduced. The agent absorbs the moisture in the indoor air again.

Implementation mode 3.

An example of the configuration of the refrigerant circuit RCb of the refrigeration cycle apparatus according to Embodiment 3 is schematically shown in FIGS. 15 to 18 . In the refrigerant circuit RCb of the third embodiment, the fourth heat exchanger 44 is added to the refrigerant circuit RCa of the second embodiment described above. Other configurations of the refrigerant circuit RCb are the same as those of the refrigerant circuit RCa. In addition, other configurations and operations of the refrigeration cycle apparatus according to Embodiment 3 are the same as those of the refrigeration cycle apparatus 1 shown in FIG. 1 described above.

The fourth heat exchanger 44 is arranged between the discharge port of the compressor 10 and the first switching valve 60 . The fourth heat exchanger 44 exchanges heat between the refrigerant discharged from the compressor 10 and the outside air.

Fig. 15 is a diagram showing a state of the refrigerant circuit RCb in the first cooling operation. Fig. 16 is a diagram showing a state during the first switching operation of the refrigerant circuit RCb. Fig. 17 is a diagram showing a state of the refrigerant circuit RCb in the second cooling operation. FIG. 18 is a diagram showing a state during the second switching operation of the refrigerant circuit RCb.

The state of each operating compressor 10 , first switching valve 60 , second switching valve 70 , first air blower 80 , and second air blower 90 is basically controlled in the same manner as in the second embodiment described above.

When the first heat exchanger 20 or the second heat exchanger 40 functions as a condenser, when frost or moisture adheres to the condenser, the heat conversion efficiency of the condenser changes depending on the amount of frost or moisture adhered. In addition, since it is used as a condenser, the amount of frost and moisture adhered may change along with the operation, so the high pressure inside the condenser changes momentarily.

In view of this point, in the refrigerant circuit RCb of Embodiment 3, the fourth heat exchanger 44 is added between the discharge port of the compressor 10 and the first switching valve 60 . Accordingly, even when the heat exchanger performance of the first heat exchanger 20 or the second heat exchanger 40 changes, the high pressure can be stably maintained at a constant value.

In addition, as shown in FIG. 15 , in the refrigerant circuit RCb of Embodiment 3, in the first cooling operation, outdoor air is blown to the third heat exchanger 42 after passing through the first heat exchanger 20 . Thereby, the heat exchange of the 4th heat exchanger 44 functioning as a condenser can be accelerated.

[Configuration example of the first air blower 80 and the second air blower 90]

Hereinafter, configuration examples of the first air blower 80 and the second air blower 90 used in the refrigeration cycle apparatuses in the first to third embodiments described above will be described.

FIGS. 19 and 20 are diagrams showing configuration examples of the first air blower 80 and the second air blower 90 suitable for the refrigeration cycle apparatus in Embodiment 1 described above. 19 shows the state during the first cooling operation (see FIG. 6 ) of Embodiment 1, and FIG. 20 shows the state during the second cooling operation of Embodiment 1 (see FIG. 7 ).

The first air blower 80 includes a fan 81 , an air passage 82 , and an air passage switch 83 . Fan 81 operates according to an instruction from control device 100 , and blows indoor air into air duct 82 . The air passage 82 communicates the room to be cooled with the first heat exchanger 20 and the second heat exchanger 40 . The air path switcher 83 is configured to switch the path in the air path 82 in accordance with an instruction from the control device 100 to switch the supply destination of the indoor air between the first heat exchanger 20 and the second heat exchanger 40 . In addition, the state of the air path switcher 83 is switched, for example by driving a motor not shown.

The second air blower 90 includes a fan 91 , an air passage 92 , and an air passage switch 83 shared with the first air blower 80 . The fan 91 operates in response to an instruction from the control device 100 , and blows outdoor air into the air duct 92 . The air passage 92 communicates the outside of the room which is not a cooling target with the first heat exchanger 20 and the second heat exchanger 40 . The air path switcher 83 is configured to switch the path in the air path 92 in accordance with an instruction from the control device 100 so as to switch the supply destination of outdoor air between the first heat exchanger 20 and the second heat exchanger 40 .

In the first cooling operation, by operating the fans 81 and 91 and setting the air path switcher 83 in the state shown in FIG. The blowing destination of outdoor air is set to the first heat exchanger 20 . In the second cooling operation, by operating the fans 81 and 91 and setting the air path switcher 83 in the state shown in FIG. The blowing destination of outdoor air is set to the second heat exchanger 40 .

FIGS. 21 and 22 are diagrams showing configuration examples of the first air blower 80A and the second air blower 90A suitable for the refrigeration cycle apparatus in Embodiment 2 described above. 21 shows the state during the first cooling operation of Embodiment 2 (see FIG. 11 ), and FIG. 22 shows the state during the second cooling operation of Embodiment 2 (see FIG. 13 ).

80 A of 1st air blowing apparatuses have added air paths 82a and 82b and air path switchers 83a and 83b to the above-mentioned 1st air blowing apparatus 80. As shown in FIG. 2nd air blower 90A adds air path 92a, 92b and air path switcher 83a, 83b shared between 1st air blower 80A with respect to the said 2nd air blower 90.

The air passage 82 a is formed to supply the air that has passed through the first heat exchanger 20 to the third heat exchanger 42 . The air passage 82 b is formed to supply the air that has passed through the second heat exchanger 40 to the third heat exchanger 42 . The air passage 92a is formed to supply air that has passed through the first heat exchanger 20 to the outside. The air passage 92b is formed to supply air that has passed through the second heat exchanger 40 to the outside.

The air path switcher 83 a is configured to be able to switch the supply destination of the air passing through the first heat exchanger 20 between the air path 82 a and the air path 92 a in accordance with an instruction from the control device 100 . The air path switcher 83b is configured to be able to switch the supply destination of the air passing through the second heat exchanger 40 between the air path 82b and the air path 92b in accordance with an instruction from the control device 100 . In addition, the states of the air path switchers 83a and 83b are switched, for example, by driving a motor not shown.

In the first cooling operation, by operating the fans 81, 91 and setting the air path switchers 83, 83a, 83b in the state shown in Fig. 21, the second heat exchanger 40, the third heat exchanger The sequence of 42 blows the indoor air, and sets the destination of the outdoor air as the first heat exchanger 20 . In the second cooling operation, by operating the fans 81, 91 and setting the air path switchers 83, 83a, 83b in the state shown in Fig. 22, the first heat exchanger 20, the third heat exchanger The indoor air is blown in the order of 42, and the blowing destination of the outdoor air is set to the second heat exchanger 40 .

23 and 24 are diagrams showing configuration examples of the first air blower 80A and the second air blower 90B suitable for the refrigeration cycle apparatus in Embodiment 3 described above. 23 shows the state during the first cooling operation of Embodiment 3 (see FIG. 15 ), and FIG. 24 shows the state during the second cooling operation of Embodiment 3 (see FIG. 17 ).

80 A of 1st air blowers are the same as 80 A of 1st air blowers shown in FIG. 21 mentioned above. In the 2nd air blower 90B, the air paths 92a and 92b of the 2nd air blower 90A shown in FIG. 21 mentioned above are changed into the air paths 92c and 92d, respectively.

The air passage 92c is formed so as to supply the air passing through the first heat exchanger 20 to the fourth heat exchanger 44 . The air passage 92d is formed so that the air which passed through the 2nd heat exchanger 40 is supplied to the 4th heat exchanger 44. As shown in FIG.

In the first cooling operation, by operating the fans 81, 91 and setting the air path switchers 83, 83a, 83b in the state shown in Fig. 23, the second heat exchanger 40, the third heat exchanger The indoor air is blown in the order of 42, and the outdoor air is blown in the order of the first heat exchanger 20 and the fourth heat exchanger 44. In the second cooling operation, by operating the fans 81, 91 and setting the air path switchers 83, 83a, 83b in the state shown in Fig. 24, the first heat exchanger 20, the third heat exchanger The indoor air is blown in the order of 42, and the outdoor air is blown in the order of the second heat exchanger 40 and the fourth heat exchanger 44.

The embodiments disclosed this time are examples in all points, and should not be considered as restrictive. The scope of the present disclosure is shown not by the above description but by the claims, and all changes within the meaning and range equivalent to the claims are included.

Explanation of reference signs

1 Refrigeration cycle device, 10 Compressor, 20 1st heat exchanger, 30, 32 Pressure reducing device, 40 2nd heat exchanger, 42 3rd heat exchanger, 44 4th heat exchanger, 51~58 Piping, 60 1st switching valve, 70 2nd switching valve, 71 container, 72 valve body, 73~75 flow path, 76 rotating shaft, 80, 80A 1st air supply device, 81, 91 fan, 82, 82a, 82b, 92, 92a, 92b, 92c, 92d air circuit, 83, 83a, 83b air circuit switcher, 90, 90A second air supply device, 100 control device, RC, RCa, RCb refrigerant circuits.

Claims (9)

1. A refrigeration cycle apparatus capable of switching between a 1 st operation in which a refrigerant is circulated in the order of a compressor, a 1 st heat exchanger, a pressure reducing device, and a 2 nd heat exchanger, and a 2 nd operation in which a refrigerant is circulated in the order of the compressor, the 2 nd heat exchanger, the pressure reducing device, and the 1 st heat exchanger, wherein,

the refrigeration cycle device is provided with:

a 1 st switching valve connected to a discharge port of the compressor, one port of the 1 st heat exchanger, one port of the 2 nd heat exchanger, and one port of the pressure reducing device;

a 2 nd switching valve connected to a suction port of the compressor, the other port of the 1 st heat exchanger, the other port of the 2 nd heat exchanger, and the other port of the pressure reducing device; and

a control device that controls the 1 st switching valve and the 2 nd switching valve,

the 1 st switching valve is configured to be switchable between any of a 1 st state and a 2 nd state, the 1 st state being a state in which the discharge port of the compressor is connected to the one port of the 1 st heat exchanger and the one port of the 2 nd heat exchanger is connected to the one port of the pressure reducing device, the 2 nd state being a state in which the discharge port of the compressor is connected to the one port of the 2 nd heat exchanger and the one port of the 1 st heat exchanger is connected to the one port of the pressure reducing device,

the 2 nd switching valve is configured to be switchable to any one of a 3 rd state, a 4 th state, and a 5 th state, the 3 rd state being a state in which the other port of the 1 st heat exchanger is connected to the other port of the decompressor and the other port of the 2 nd heat exchanger is connected to the suction port of the compressor, the 4 th state being a state in which the other port of the 2 nd heat exchanger is connected to the other port of the decompressor and the other port of the 1 st heat exchanger is connected to the suction port of the compressor, the 5 th state being a state in which the other port of the decompressor is connected to the suction port of the compressor and the other port of the 1 st heat exchanger is blocked from the other port of the 2 nd heat exchanger,

the control device sets the 1 st switching valve to the 1 st state and the 2 nd switching valve to the 3 rd state in the 1 st operation, sets the 1 st switching valve to the 2 nd state and the 2 nd switching valve to the 4 th state in the 2 nd operation,

when a request for switching to the 2 nd operation is made during the 1 st operation, the control device performs a 1 st switching operation in which the 1 st switching valve is in the 2 nd state and the 2 nd switching valve is in the 5 th state, and switches the operation of the refrigeration cycle apparatus to the 2 nd operation after the 1 st switching operation is performed.

2. The refrigeration cycle apparatus according to claim 1,

when switching to the 1 st operation is requested during the 2 nd operation, the control device performs a 2 nd switching operation in which the 1 st switching valve is set to the 1 st state and the 2 nd switching valve is set to the 5 th state, and switches the operation of the refrigeration cycle apparatus to the 1 st operation after the 2 nd switching operation is performed.

3. The refrigeration cycle apparatus according to claim 2,

the refrigeration cycle apparatus further includes an air blowing device configured to blow air to the 1 st heat exchanger and the 2 nd heat exchanger,

the control device controls the air blowing device so that air blowing to the 1 st heat exchanger and the 2 nd heat exchanger is stopped during the 1 st switching operation and the 2 nd switching operation.

4. The refrigeration cycle apparatus according to claim 3,

the air blowing device includes a 1 st air blowing device configured to be capable of switching an air blowing destination of indoor air to be cooled to either one of the 1 st heat exchanger and the 2 nd heat exchanger,

the control device controls the 1 st air blowing device such that the air blowing destination of the indoor air is the 2 nd heat exchanger in the 1 st operation, and the air blowing destination of the indoor air is the 1 st heat exchanger in the 2 nd operation.

5. The refrigeration cycle apparatus according to claim 4, wherein,

the air blowing device comprises a 2 nd air blowing device, the 2 nd air blowing device is configured to be capable of switching the air blowing destination of outdoor air which is not a cooling object to any one of the 1 st heat exchanger and the 2 nd heat exchanger,

the control device controls the 2 nd air blowing device such that the 1 st heat exchanger is set as the destination of the outdoor air in the 1 st operation, and the 2 nd heat exchanger is set as the destination of the outdoor air in the 2 nd operation.

6. The refrigeration cycle apparatus according to claim 4 or 5, wherein,

the refrigeration cycle device further includes a 2 nd pressure reducing device and a 3 rd heat exchanger, and the 2 nd pressure reducing device and the 3 rd heat exchanger are disposed between the 2 nd switching valve and a suction port of the compressor.

7. The refrigeration cycle apparatus according to claim 6, wherein,

in the 1 st operation, the indoor air is blown in the order of the 2 nd heat exchanger and the 3 rd heat exchanger, and in the 2 nd operation, the indoor air is blown in the order of the 1 st heat exchanger and the 3 rd heat exchanger.

8. The refrigeration cycle apparatus according to claim 7, wherein,

the surfaces of the 1 st heat exchanger and the 2 nd heat exchanger are coated with an adsorbent for adsorbing moisture in the air.

9. The refrigeration cycle device according to any one of claims 6 to 8, wherein,

the refrigeration cycle device further includes a 4 th heat exchanger disposed between a discharge port of the compressor and the 1 st switching valve.

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