Patent ID: 11788759

Abstract:
A refrigerant circuit (11), in which carbon dioxide circulates as a refrigerant, includes a plurality of heat exchangers (12), a receiver (60), a degassing passage (61), and a degassing valve (62). The refrigeration system implements a first operation during which one of the plurality of heat exchangers (12) functions as a radiator while two of the plurality of heat exchangers (12) function as evaporators, and the refrigerant flows from the heat exchanger (12) functioning as a radiator into the receiver (60) and then flows from the receiver (60) into each of the two heat exchangers (12) functioning as evaporators. The control unit (15) changes the degassing valve (62) from a closed state to an open state when a pressure (RP) in the receiver (60) exceeds a first pressure (Pth1) set in advance, in the first operation.