| 摘要 |
PROBLEM TO BE SOLVED: To provide a refrigerator provided with a compressor having a plurality of compression chambers and capable of suppressing the fluctuation of the compression torque of a driving shaft at a cylinder halt operation time and a two-step compression operation time. SOLUTION: The compressor (20) is provided with compression mechanisms (61, 62) having four compression chambers (61, 62, 63 and 64). In the compressor (20), phases of fluctuation periods of volumes of the first compression chamber (61) and the second compression chamber (62) are deviated from each other at 180°, and phases of fluctuation periods of volumes of the third compression chamber (63) and the fourth compression chamber (64) are also deviated from each other at 180°. In cylinder halt operation, refrigerants are compressed at a single step in the first compression chamber (61) and the second compression chamber (62), respectively, and the compression operation of refrigerants in the third compression chamber (63) and the fourth compression chamber (64) is halted. In two-step compression operation, the refrigerants compressed at a single step in the first compression chamber 61 and the second compression chamber (62), respectively, are further compressed in the third compression chamber (63) and the fourth compression chamber (64). COPYRIGHT: (C)2007,JPO&INPIT
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