| 摘要 |
PROBLEM TO BE SOLVED: To provide a refrigeration cycle device capable of improving COP by appropriately controlling a ratio of a flow rate G and a density &rgr; of a refrigerant flowing into a compressor and an expander.SOLUTION: The refrigeration cycle device comprises: a first compressor 1 for compressing a refrigerant; a second compressor 2 for further compressing the refrigerant which has been compressed by the first compressor 1; exothermic heat exchangers 5, 12 for cooling the refrigerant which has been compressed by the second compressor 2, through heat exchange with outside air; an expander 11 which is formed coaxially with the first compressor 1 and expands the refrigerant which has been cooled by the exothermic heat exchangers 5, 12; and endothermic heat exchangers 12, 5 for heating the refrigerant expanded by the expander 11. The refrigeration cycle device further comprises: first bypass channels 9, 19 in which the refrigerant cooled by the exothermic heat exchangers 5, 12 is caused to flow into the first compressor 1 after being decompressed partially; and second bypass channels 9, 20 in which the refrigerant cooled by the exothermic heat exchangers 5, 12 is caused to flow into the second compressor 2 after being decompressed partially. |
