Refrigeration cycle device

A refrigeration cycle device comprising:

• a compressor that introduces, compresses, and then discharges a refrigerant;
• a first utilization-side heat exchanger that exchanges heat between a high-pressure refrigerant discharged from a discharge port of the compressor and a heat exchange target fluid;
• a second utilization-side heat exchanger that exchanges heat between the refrigerant and the heat exchange target fluid, and causes the refrigerant to flow out to a suction port of the compressor;
• an exterior heat exchanger that exchanges heat between the refrigerant and outside air;
• an ejector having a pressure boosting section in which an injection refrigerant jetted from a nozzle section, which decompresses the refrigerant, is mixed with a suction refrigerant drawn from a refrigerant suction port by absorption action of the injection refrigerant jetted from the nozzle section, so as to increases a pressure of the refrigerant;
• a gas-liquid separation section in which the refrigerant flowing out of the ejector is separated into gas phase refrigerant and liquid phase refrigerant;
• an intermediate-pressure refrigerant passage that causes the gas phase refrigerant separated in the gas-liquid separation section to be introduced to an intermediate-pressure suction port provided in the compressor and to be joined to a refrigerant in a compression process of the compressor;
• a first variable throttle valve decompressing the refrigerant flowing through a refrigerant passage that connects the exterior heat exchanger to the gas-liquid separation section;
• a second variable throttle valve decompressing the refrigerant flowing through a refrigerant passage that connecting the second utilization-side heat exchanger to the gas-liquid separation section;
• and
• a refrigerant circuit switching section that switches a refrigerant circuit in which the refrigerant is circulated in a cycle, wherein
• the refrigerant circuit switching section switched such that,
• in a first operation mode, the refrigerant flowing out of the first utilization-side heat exchanger flows into the nozzle section, and the liquid phase refrigerant separated in the gas-liquid separation section flows into the second utilization-side heat exchanger through the second variable throttle valve and at the same time the liquid phase refrigerant separated in the gas-liquid separation section flows through the first variable throttle valve, the exterior heat exchanger, and the refrigerant suction port in this order, and
• in a second operation mode, the refrigerant flowing out of the first utilization-side heat exchanger flows through the exterior heat exchanger, the first variable throttle valve, and the gas-liquid separation section in this order, and the liquid phase refrigerant separated in the gas-liquid separation section flows into the second utilization-side heat exchanger through the second variable throttle valve.