Refrigeration cycle device

A refrigeration cycle device comprising:

• a compressor to compress refrigerant;
• a suction passage connecting to a suction port of the compressor;
• a discharge passage connecting to a discharge port of the compressor;
• an air heat exchanger to exchange heat between the refrigerant and air;
• a utilization heat exchanger to exchange heat between the refrigerant and a heat medium;
• a first refrigerant passage connecting the utilization heat exchanger to the discharge passage;
• a second refrigerant passage connecting the air heat exchanger to the suction passage;
• a receiver to store therein liquid refrigerant that is the refrigerant in liquid phase;
• a first expansion valve;
• a second expansion valve;
• a third refrigerant passage connecting the utilization heat exchanger to the first expansion valve;
• a fourth refrigerant passage connecting the first expansion valve to the receiver;
• a fifth refrigerant passage connecting the receiver to the second expansion valve;
• a sixth refrigerant passage connecting the second expansion valve to the air heat exchanger;
• a hot-gas bypass passage connecting the discharge passage to the sixth refrigerant passage;
• a hot-gas bypass valve provided on the hot-gas bypass passage;
• an internal heat exchanger to exchange heat between the liquid refrigerant inside the receiver and the refrigerant passing through the suction passage, or between the refrigerant passing through the fourth refrigerant passage and the refrigerant passing through the suction passage;
• a liquid bypass passage including an inlet portion connected to the fourth refrigerant passage, the fifth refrigerant passage, or a lower portion of the receiver, and an outlet portion connected to the suction passage upstream of the internal heat exchanger;
• and
• a liquid bypass valve provided on the liquid bypass passage.