GAS EXTRACTION OPERATING METHOD OF COMPRESSION TYPE REFRIGERATING MACHINE

摘要

PROBLEM TO BE SOLVED: To reduce the amount of refrigerant gas discharged out of an air extracting device for a compression type refrigerating machine. SOLUTION: In the gas extraction operating method of the compression type refrigerating machine wherein mixed gas of non-condensible gas and refrigerant gas which is mixed into the system of the compression type refrigerating machine is guided from the condenser to the separator of the gas extracting device to cool the same and when a pressure in the separator has arrived at a predetermined set value SV1 or higher while condensing the refrigerant gas in the mixed gas, the mixed gas in the separator is discharged, the refrigerating machine is operated while setting the set value SV1 at an intermediate value within the up-and-down fluctuating range of a compressing pressure in the compressor.