| 摘要 |
PROBLEM TO BE SOLVED: To provide a refrigerating cycle capable of obtaining good cooling efficiency even in a condition of a comparatively low thermal load and maintaining an optimal cooling efficiency even when the load fluctuates, in the case a refrigerating cycle using an internal heat exchanger and an expansion machine is used for securing refrigerant capacity at a time of high load. SOLUTION: The refrigerating cycle is equipped with a compressor 2 for giving pressure rise to the refrigerant, a radiator 3 for radiating heat of the pressure-raised refrigerant by the compressor 2, the expansion machine 4 arranged further on the downstream side than the condenser 3 for taking out power by decompressing and expanding the refrigerant, an evaporator 5 for vaporizing the refrigerant decompressed and expanded in the expansion machine 4, and the internal heat exchanger 8 for heat exchanging a high pressure refrigerant introduced from the condenser 3 to the expansion machine 4, and the low pressure refrigerant introduced from the evaporator 5 to the compressor 2. The heat changing amount of the high pressure refrigerant and the low pressure refrigerant by the internal heat exchanger 8 can be adjusted. COPYRIGHT: (C)2007,JPO&INPIT
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