Patent ID: 7320228

Claim:
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; wherein 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; and wherein an inner diameter of the capillary tube is set to 0.1 mm or more and 0.4 mm or less.