| 摘要 |
PURPOSE:To improve the refrigeration performance through the continuous stepless control by increase/decrease-controlling the total operation capacity of the compressors in operation by the min. capacity portion of one compressor to be in stop, immediately before the start or stop of the compressor. CONSTITUTION:When one compressor 4 among two units of compressors 4 and 5 is in operation, if the other compressor 5 in stop starts operation, the total operation capacity of the compressors increases by the min. capacity portion because of the start of operation, but the operation capacity of the compressor 4 in operation state immediately before is reduction-controlled by the min. capacity portion by a control means 16, and the total operation capacity is kept constant before and after the start of operation of the compressor 5. Further, when the both compressors 4 and 5 are in operation, if one compressor 5 stops operation, the operation capacity of the compressor 4 is increase- controlled by the min. operation capacity by the control means 16. Thus, on the start or stop of the compressors, the total operation capacity can be continuously controlled steplessly, and the control precision can be improved. |
