| 摘要 |
PROBLEM TO BE SOLVED: To provide a refrigeration device capable of reliably and efficiently circulating lubricant between a plurality of compressors.SOLUTION: The number of operating compressors and abilities of plural compressors are controlled according to load, and among the plural compressors, the ability of a compressor having higher operational priority is set higher than those of the other compressors by a predetermined value. Also, control means detects the rotation position of a roller in each of the plural compressors, and controls drive of the plural compressors so that the detected rotation positions are made mutually point-symmetric.SELECTED DRAWING: Figure 1 |
