JPWO2022149187A5

JPWO2022149187A5 -

Info

Publication number: JPWO2022149187A5
Application number: JP2022573816A
Authority: JP
Filing date: 2021-01-05
Publication date: 2023-08-28

Description

冷媒貯留装置を備えた従来の冷凍サイクル装置としては、例えば、国際公開第２０１６／１２１０６８号（特許文献１）に開示されたように、圧縮機、流路切替装置、熱源側熱交換器、第１絞り装置および利用側熱交換器を含む冷媒回路と、第１絞り装置に並列に接続される液バック抑制回路とを備え、液バック抑制回路が第２絞り装置、開閉弁および第２絞り装置と開閉弁との間に接続される高圧レシーバを含むものがあった。 As a conventional refrigeration cycle device equipped with a refrigerant storage device, for example, as disclosed in International Publication No. 2016/121068 (Patent Document 1), a compressor, a flow path switching device, a heat source side heat exchanger, 1, a refrigerant circuit including a throttle device and a user-side heat exchanger; and a liquid backflow suppression circuit connected in parallel to the first throttle device, wherein the liquid backflow suppression circuit comprises a second throttle device, an on-off valve, and the second throttle device. and the on-off valve.

本開示の冷凍サイクル装置によれば、冷房運転を起動するときに、第２冷媒経路から冷媒貯留装置への冷媒の流入を遮断するように第２流量調整装置が制御されるので、外気温度が極めて低い状態での冷房運転の起動時に冷媒貯留装置内に冷媒が流入することを防ぐことができる。これにより、本開示の冷凍サイクル装置では、冷房運転において、冷媒量が不足せず、冷凍サイクル装置の機能が低下しないようにすることができる。 According to the refrigeration cycle device of the present disclosure, when starting the cooling operation, the second flow rate adjusting device is controlled to block the inflow of the refrigerant from the second refrigerant path to the refrigerant storage device. It is possible to prevent the refrigerant from flowing into the refrigerant storage device when the cooling operation is started in an extremely low temperature state. Thereby, in the refrigerating cycle device of the present disclosure, it is possible to prevent the refrigerant from running short and the function of the refrigerating cycle device from deteriorating in the cooling operation.

実施の形態１．
図１および図２は、実施の形態１における冷凍サイクル装置１の冷媒回路構成を示す図である。図１には、冷房運転時における冷凍サイクル装置１の冷媒回路の状態が示される。図２には、暖房運転時における冷凍サイクル装置１の冷媒回路の状態が示される。 Embodiment 1.
1 and 2 are diagrams showing a refrigerant circuit configuration of a refrigeration cycle apparatus 1 according to Embodiment 1. FIG. FIG. 1 shows the state of the refrigerant circuit of the refrigeration cycle device 1 during cooling operation. FIG. 2 shows the state of the refrigerant circuit of the refrigeration cycle device 1 during heating operation.

Claims

a first heat exchanger;
a second heat exchanger;
a compressor provided in a first refrigerant path between the first heat exchanger and the second heat exchanger;
a first flow control device provided in a second refrigerant path between the first heat exchanger and the second heat exchanger;
provided in a third refrigerant path connected in parallel with part of the second refrigerant path between the first heat exchanger and the second heat exchanger, and stores refrigerant flowing from the second refrigerant path; a refrigerant storage device capable of
The second refrigerant path and the refrigerant storage device provided closer to the second heat exchanger than the refrigerant storage device in the third refrigerant path , and between the second heat exchanger and the first flow rate adjustment device a second flow rate adjusting device that adjusts the flow rate of the refrigerant between
and a control device that controls the second flow control device so as to block the inflow of the refrigerant from the second refrigerant path to the refrigerant storage device when cooling operation is started.

The refrigeration cycle apparatus according to claim 1, wherein said first flow rate adjusting device is controlled by said control device so as to adjust the flow rate of refrigerant in both cooling operation and heating operation.

a third flow regulating device provided in a fourth refrigerant path that supplies liquid refrigerant to the compressor between the second refrigerant path and the suction side of the compressor;
a first branch path branched from a path between the first heat exchanger and the first flow control device in the second refrigerant path and connected to an inlet side of the third flow control device;
a second branch path branched from a path between the second heat exchanger and the first flow control device in the second refrigerant path and connected to an inlet side of the third flow control device;
a first check valve that supplies the liquid refrigerant in one direction to an inlet side of the third flow control device in the first branch path;
3. The refrigeration cycle apparatus according to claim 2, further comprising a second check valve that supplies the liquid refrigerant in one direction to an inlet side of the third flow control device in the second branch path.

Further comprising a temperature sensor that detects the temperature on the discharge side of the compressor,
4. The refrigeration cycle apparatus according to claim 3, wherein said control device controls said third flow rate control device to an open state when the temperature on the discharge side of said compressor detected by said temperature sensor exceeds a threshold value. .

The first flow rate adjusting device is provided at a position parallel to the refrigerant storage device in the second refrigerant path,
A third non-return provided in the third refrigerant path for allowing the refrigerant in the refrigerant storage device to flow in one direction to the second refrigerant path between the first heat exchanger and the first flow control device further comprising a valve,
2. When starting the defrosting operation, the control device controls the second flow control device so that the refrigerant flows out until the amount of refrigerant stored in the refrigerant storage device becomes equal to or less than a threshold value. The refrigeration cycle device according to .

further comprising a storage amount detection sensor that detects the amount of refrigerant stored in the refrigerant storage device,
When starting the defrosting operation, the control device controls the amount of refrigerant stored in the refrigerant storage device until the amount of refrigerant stored in the refrigerant storage device becomes equal to or less than a threshold value based on the storage amount of refrigerant detected by the storage amount detection sensor. 6. The refrigeration cycle apparatus according to claim 5, wherein said second flow rate adjusting device is controlled such that refrigerant flows out from said refrigerant storage device through said second flow rate adjusting device.

further comprising a storage amount detection sensor that detects the amount of refrigerant stored in the refrigerant storage device,
When starting the defrosting operation, the control device controls the amount of refrigerant stored in the refrigerant storage device until the amount of refrigerant stored in the refrigerant storage device becomes equal to or less than a threshold value based on the storage amount of refrigerant detected by the storage amount detection sensor. 6. The refrigeration cycle apparatus according to claim 5, wherein said second flow control device is controlled such that refrigerant flows out from said refrigerant storage device through said third check valve.

When starting the defrosting operation, the controller controls the refrigerant storage device for a predetermined time so that the refrigerant flows out until the amount of refrigerant stored in the refrigerant storage device becomes equal to or less than a threshold value. 6. The refrigerating cycle device according to claim 5, wherein said second flow control device is controlled such that refrigerant flows out from said third check valve.