| 摘要 |
PROBLEM TO BE SOLVED: To provide a refrigeration cycle device capable of improving efficiency as a whole by recovering energy by an expander, while reducing energy consumption in a compressor. SOLUTION: This refrigeration cycle device comprises a two-stage compressing device 3 composed of a low stage-side compressor 1 and a high stage-side compressor 2, a radiator 4 for cooling a high-pressure gas refrigerant, a pressure reducing device including the expander 5 for expanding the high-pressure refrigerant after cooled by the radiator 4, an evaporator 8 for evaporating the low-pressure refrigerant depressurized by the pressure reducing device, and a gas injection circuit 10 for introducing the intermediate-pressure gas refrigerant depressurized by the pressure reducing device, to a suction side of the high stage-side compressor 2, and coaxially connects the expander 5 with the low-stage side compressor 1. COPYRIGHT: (C)2006,JPO&NCIPI
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