To suppress degradation in operation efficiency of a refrigerating device while avoiding shortage of refrigerating machine oil in each compressor of a compression mechanism, in the refrigerating device performing a refrigerating cycle in which two evaporators have different refrigerant evaporation temperatures.
During execution of the refrigerating cycle in which the evaporation temperature in an internal heat exchanger (64a) becomes lower than that in an indoor heat exchanger (54), a controller (110) performs the first operation and the second operation, alternately. The controller (110) during the first operation sets a second outdoor expansion valve (67) in the opened state and a first fixation side operation valve (38b) in the closed state. The controller (110) during the second operation sets the first fixation side operation valve (38b) in the opened state, and expands an opening of the second outdoor expansion valve (67) compared to during the first operation so that pressure of a refrigerant passed through the second outdoor expansion valve (67) exceeds internal pressure of a compression chamber (73) of intermediate pressure of a first fixation compressor (14b).
TAKEGAMI MASAAKI
NOMURA KAZUHIDE
ODA YOSHINARI
| JP2007178052A | 2007-07-12 | |||
| JP2006098045A | 2006-04-13 | |||
| JP2008032305A | 2008-02-14 | |||
| JP2006023002A | 2006-01-26 | |||
| JPH04309752A | 1992-11-02 |
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