TWO-STAGE COMPRESSION REFRIGERATING MACHINE, AND FILLING METHOD FOR REFRIGERATING MACHINE OIL AND REFRIGERANT

摘要

PROBLEM TO BE SOLVED: To fill a closed housing of a two-stage compressor with a sufficient quantity of a refrigerating machine oil by filling the closed housing of the two-stage compressor without passing it through a compression mechanism part in which flow resistance is high, with the refrigerating machine oil, in a two-stage compression refrigerating machine using the two-stage compressor. SOLUTION: Piping for filling refrigerant communicating with the inside of the closed housing of the two-stage compressor housing a low stage side compression mechanism part and a high stage side compression mechanism part is provided to fill a refrigerant filling instrument connected to the piping for filling refrigerant with the refrigerant. COPYRIGHT: (C)2003,JPO