| 摘要 |
The present invention relates to compressors including a compression mechanism whose volume can be changed by partially ejecting, through a bypass passage, refrigerant in a compression chamber. The area of an opening of the bypass passage formed in a compression chamber is sufficiently ensured. A compressor (20) includes a low-stage side compression mechanism (40a) having a low-stage side cylinder (41a) and a low-stage side piston (47a) and configured to compress refrigerant in the low-stage side cylinder (42a). The low-stage side compression mechanism (40a) is provided with a bypass passage (66) whose upstream end is opened to a low-stage side cylinder chamber (42a) and through which refrigerant is partially ejected from the low-stage side cylinder chamber (42a) so as to be returned to a suction side of the low-stage side compression mechanism (40a). The cross section of the upstream end of the bypass passage (66) is elongated circumferentially about a rotational axis (X). |
