REFRIGERATION CYCLE DEVICE

WIPO Patent Application WO/2022/009713

A1

The present invention comprises: a compressor (11) that compresses and discharges a refrigerant; a heat dissipation unit (40, 12) that dissipates heat from the refrigerant discharged from the compressor; a first decompression unit (14b) that decompresses the refrigerant flowing out from the heat dissipation unit, and the opening degree of which is adjusted by an electrical mechanism; a second decompression unit (14e, 14c) that is disposed in parallel with the first decompression unit in the refrigerant flow direction and decompresses the refrigerant flowing out from the heat dissipation unit; a first evaporator (18) that evaporates the refrigerant flowing out from the first decompression unit; a second evaporator (23, 19) that evaporates the refrigerant flowing out from the second decompression unit; and a control unit (60) that controls the opening degree of the first decompression unit. The second decompression unit has a mechanical mechanism for increasing the opening degree when the pressure of the refrigerant on the outlet side of the second evaporator decreases. Upon detecting that the refrigeration oil mixed in the refrigerant has accumulated in the second evaporator, the control unit performs oil return control to temporarily increase the opening degree of the first decompression unit.

KAMI YUICHI (JP)
XU ZHAOLIANG (JP)

PCT/JP2021/024289

January 13, 2022

June 28, 2021

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DENSO CORP (JP)

F25B5/02; B60H1/32; F25B1/00; F25B49/02

JP2019129087A	2019-08-01
JP2000283576A	2000-10-13
JPH09109656A	1997-04-28

KAI-SEI PATENT FIRM (JP)

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