Refrigeration cycle device

A refrigeration cycle device comprising:

• a compressor that sucks in and discharges refrigerant;
• a radiator that radiates heat from the refrigerant discharged from the compressor;
• an air-conditioning heat exchanger that evaporates the refrigerant by absorbing heat from air;
• a cooling heat exchanger arranged in parallel with the air-conditioning heat exchanger in a flow of the refrigerant that radiates heat in the radiator, the cooling heat exchanger evaporating the refrigerant by absorbing heat from a target object or a heat medium circulating for the target object;
• an air-conditioning decompression unit that adjusts a decompression amount of the refrigerant flowing into the air-conditioning heat exchanger by adjusting an opening area of an air-conditioning passage that guides the refrigerant flowing out of the radiator toward an inlet of the air-conditioning heat exchanger;
• a cooler-unit decompression unit that adjusts a decompression amount of the refrigerant flowing into the cooling heat exchanger by adjusting an opening area of a cooling passage that guides the refrigerant flowing out of the radiator toward an inlet of the cooling heat exchanger;
• a refrigerant flow rate detector that detects a flow rate of the refrigerant flowing into the cooling heat exchanger;
• a controller that controls operation of the cooler-unit decompression unit so that the flow rate of the refrigerant detected by the refrigerant flow rate detector exceeds a predetermined reference flow rate;
• and
• a superheat degree detector that detects a superheat degree of the refrigerant flowing out of the cooling heat exchanger, wherein
• the controller controls operation of the cooler-unit decompression unit such that the superheat degree of the refrigerant detected by the superheat degree detector approaches a target superheat degree in case where the flow rate of the refrigerant detected by the refrigerant flow rate detector is higher than the reference flow rate, and
• the controller controls operation of the cooler-unit decompression unit to increase the opening area of the cooling passage when the superheat degree detected by the superheat degree detector is lower than the target superheat degree in case where the flow rate of the refrigerant detected by the refrigerant flow rate detector is equal to or lower than the reference flow rate.