| 摘要 |
PROBLEM TO BE SOLVED: To combine the sufficient supply of lubricating oil to an expander and the improvement of heating efficiency of the whole cycle in a refrigerating cycle device equipped with a compressor and the expander. SOLUTION: The refrigerating cycle device 10 comprises a refrigerant circuit 11 where the compressor 1, an oil separator 9, a radiator 2, the expander 3 and an evaporator 5 are connected in this order, and an oil supply pipe 7 connecting the oil separator 9 to inlet side piping 13 of the expander 3. The oil supply pipe 7 is provided with an opening adjustable valve 8 and a cooler 6 cooling the lubricating oil by exchanging heat between a low pressure refrigerant and the lubricating oil. The inlet side piping 13 is provided with a temperature sensor 12. A controller 15 controls the opening of the valve 8 based on the inlet refrigerant temperature of the expander 3. COPYRIGHT: (C)2008,JPO&INPIT
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