REFRIGERATING DEVICE

PROBLEM TO BE SOLVED: To obtain high COP regardless of changes in operating conditions, in a refrigerating device including a compressor constituted of a plurality of compression mechanisms mechanically connected by one drive shaft and performing a two-stage compression refrigerating cycle. SOLUTION: Two or more of compression mechanisms of an air conditioner including a refrigerant circuit having the compressor in which three or more of rotary type compression mechanisms are connected by one drive shaft and performing a two-stage compression refrigerating cycle are connected in parallel and used as low-stage side compression mechanisms. At least one compression mechanism (31) of the compression mechanisms connected in parallel includes a suction volume ratio changing means (2) for changing a suction volume ratio which is a ratio of a suction volume between the low-stage side compression mechanisms and a high-stage side compression mechanism by switching a compressed state that a high pressure chamber (C1-Hp) and a low pressure chamber (C1-Lp) are partitioned by a blade (63) and a refrigerant is compressed in a cylinder chamber (C1) and an uncompressed state that a the high pressure chamber (C1-Hp) communicates with the low pressure chamber (C1-Lp) and a refrigerant is not compressed in the cylinder chamber (C1). COPYRIGHT: (C)2010,JPO&INPIT