Integrated valve and heat pump cycle

A heat pump cycle switchable between a gas injection cycle that is a two-stage compression cycle and a normal cycle that is a single-stage compression cycle, the heat pump cycle comprising:

• a compressor that compresses a refrigerant received from an intake port of the compressor and discharges the refrigerant from a discharge port of the compressor, the compressor including an intermediate-pressure port through which an intermediate-pressure refrigerant flows from the heat pump cycle into the compressor and is merged with the refrigerant being in a compression process;
• a check valve that prevents a backward flow of the refrigerant flowing into the intermediate-pressure port;
• an integrated valve that reduces a pressure of the refrigerant discharged from the discharge port;
• a gas-liquid separation portion that separates gas and liquid of the refrigerant which has been reduced in pressure by the integrated valve;
• and
• an intermediate-pressure refrigerant passage that guides a gas-phase refrigerant separated by the gas-liquid separation portion to the intermediate-pressure port, wherein
• the integrated valve comprises:
• a body having a pressure reducing chamber in which a pressure of the refrigerant discharged from the compressor is reduced, and an on-off valve chamber in which a flow channel of the refrigerant flowing into the intermediate-pressure port through the intermediate-pressure refrigerant passage and through the check valve is opened or closed;
• a connecting member including a first valve element that is disposed in the pressure reducing chamber and forms a pressure reducing valve that reduces the pressure of the refrigerant discharged from the compressor, and a second valve element disposed in the on-off valve chamber and forming an on-off valve that opens or closes a flow channel of the refrigerant flowing into the intermediate-pressure port, the first valve element and the second valve element being connected to each other such that the on-off valve is in a fully opened state when the pressure reducing valve is in a throttling state, the on-off valve is in an opened state when the pressure reducing valve is in an opened state, and the on-off valve is in a closed state when the pressure reducing valve is in a fully opened state;
• and
• a motor configured to drive the connecting member.