US 7,320,228 B2
Refrigerant cycle apparatus
Ichiro Kamimura, Gunma (Japan); Hiroshi Mukaiyama, Gunma (Japan); Satoshi Imai, Gunma (Japan); Hiroyuki Itsuki, Gunma (Japan); and Masahisa Otake, Gunma (Japan)
Assigned to Sanyo Electric Co., Ltd., Osaka (Japan)
Filed on Aug. 12, 2005, as Appl. No. 11/202,204.
Claims priority of application No. 2004-235405 (JP), filed on Aug. 12, 2004.
Prior Publication US 2006/0032267 A1, Feb. 16, 2006
Int. Cl. F25B 1/00 (2006.01)
U.S. Cl. 62—498  [62/510] 4 Claims
OG exemplary drawing
 
1. 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.