Patent ID: 7624583

Claim:
A refrigeration system including: a refrigerant circuit ( 10 ) in which a compressor ( 21 ), a heat source side heat exchanger ( 24 ), an expansion mechanism ( 32 ) and a heat use side heat exchanger ( 33 ) are connected via refrigerant pipes to operate on a vapor compression refrigeration cycle; and an oil recovery container ( 40 ) connected to the suction side of the compressor ( 21 ), the refrigeration system carrying out a recovery operation for circulating refrigerant through the refrigerant circuit ( 10 ) via the recovery container ( 40 ) and carrying out a normal operation while storing the recovered oil in the recovery container ( 40 ) after the recovery operation, wherein the refrigeration system further comprises: a compressor control section ( 50 ) for stepwise increasing the operating capacity of the compressor ( 21 ) up to a predetermined capacity in an initial stage of the recovery operation so that an abrupt drop of the refrigerant temperature in the low pressure side of the refrigerant circuit ( 10 ) is suppressed; and a fan control section ( 70 ) for continuously driving a heat use side fan ( 33 a ) for the heat use side heat exchanger ( 33 ) in the recovery operation at least during driving of the compressor ( 21 ).