Refrigerant cycle apparatus

A refrigerant cycle apparatus in which a compressor, a radiator, a first pressure reducing device, an intermediate pressure receiver, a second pressure reducing device, and an evaporator are successively connected to one another in an annular form to constitute a refrigerant circuit and which is operated at a supercritical pressure on a high-pressure side,

• wherein the compressor has a first compression element and a second compression element which compresses a refrigerant compressed by the first compression element;
• a gas phase refrigerant in the intermediate pressure receiver is sucked into the second compression element of the compressor;
• a liquid phase refrigerant in the intermediate pressure receiver is pressure reduced by the second pressure reducing device and is then introduced into the evaporator;
• and
• the first pressure reducing device comprises a capillary tube on an upstream side of the refrigerant and throttling means on a downstream side of the capillary tube.