Refrigeration cycle device

A refrigeration cycle device comprising:

• a compressor configured to compress a low-pressure refrigerant drawn from a suction port such that the low-pressure refrigerant becomes a high-pressure refrigerant and to discharge the high-pressure refrigerant from a discharge port, the compressor having an intermediate pressure port through which an intermediate-pressure refrigerant in a cycle flows into the compressor and joins the refrigerant in a compression process;
• a heater device configured to heat a heat exchange target fluid using the high-pressure refrigerant discharged from the discharge port of the compressor as a heat source;
• a high-stage side decompressor configured to decompress the high-pressure refrigerant flowing out of the heater device such that the high-pressure refrigerant becomes the intermediate-pressure refrigerant;
• a gas-liquid separator configured to
• separate the intermediate-pressure refrigerant decompressed at the high-stage side decompressor into a gas refrigerant and a liquid refrigerant and
• allow the gas-refrigerant to flow to the intermediate pressure port of the compressor;
• a refrigerant branch portion configured to divide a flow of the liquid refrigerant separated by the gas-liquid separator into one flow and another flow;
• a first decompressor configured to decompress the liquid refrigerant of the one flow such that the liquid refrigerant becomes the low-pressure refrigerant;
• a first evaporator configured to
• evaporate the low-pressure refrigerant decompressed by the first decompressor by allowing the low-pressure refrigerant to absorb heat of the heat exchange target fluid and
• allow the evaporated refrigerant to flow to the suction port of the compressor;
• a second decompressor configured to decompress the liquid refrigerant of the other flow such that the liquid refrigerant becomes the low-pressure refrigerant;
• and
• a second evaporator configured to
• evaporate the low-pressure refrigerant decompressed by the second decompressor by allowing the low-pressure refrigerant to absorb heat of an external heat source and
• allow the evaporated refrigerant to flow to the suction port of the compressor, wherein
• in a cooling mode for cooling the heat exchange target fluid, a refrigerant circuit is switched such that the low-pressure refrigerant flows from the refrigerant branch portion into the first evaporator, and
• in a heating mode for heating the heat exchange target fluid, the refrigerant circuit is switched such that the low-pressure refrigerant flows from the refrigerant branch portion into the second evaporator.