| 摘要 |
PROBLEM TO BE SOLVED: To save energy by always maintaining a high coefficient of performance in a refrigerating cycle device with a refrigerant operated at a supercritical pressure on a high-pressure side. SOLUTION: This refrigerating cycle device comprises a memory 10a holding a relation between the outlet pipe temperature of a high-pressure side heat exchanger (outdoor heat exchanger 2 in cooling, indoor heat exchanger 6 in heating) and a high-pressure range in which the coefficient of the performance of a refrigerating cycle is maximized, pipe temperature detectors 20 to 23 detecting the outlet pipe temperature of the high-pressure side heat exchanger or the temperatures of pipes starting at a compressor 1 to the high-pressure side heat exchanger, and a controller 10 controlling, in a high-pressure range, the opening of an electronic expansion valve, the rotational speed of the compressor 1, and the rotational speed of an indoor fan 7 or an outdoor fan 3 based on the pipe temperatures detected by the pipe temperature detectors 20 to 23 and the optimum relation in the memory. COPYRIGHT: (C)2005,JPO&NCIPI
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