| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a refrigerating device capable of exerting a desired refrigerating capacity with a small amount of refrigerant by using a single refrigerant of HFO refrigerant or a mixed refrigerant including the HFO refrigerant. <P>SOLUTION: Heat exchangers (23, 27) are constituted of micro-channel heat exchangers having micro-channels as refrigerant flow channels. A refrigerating machine oil of non-compatible or weak compatible to a refrigerant of a refrigerant circuit (20) is used as the refrigerating machine oil supplied to a sliding section of a compressor (21). Further, a pressure of an oil storage space (44) for storing the refrigerating machine oil supplied to the sliding section of the compressor (21) is kept lower than a low pressure of a refrigerating cycle during the refrigerating cycle. Furthermore, the refrigerant at an outlet of the heat source-side heat exchanger (23) is kept in a single phase state or a gas-liquid two phase state of saturated liquid during a cooling operation, and the refrigerant in a saturated liquid state of the refrigerant flowing out from the heat source-side heat exchanger (23) and decompressed to an intermediate pressure of the refrigerating cycle, is supplied to the use-side heat exchanger (27). <P>COPYRIGHT: (C)2011,JPO&INPIT |
