| 摘要 |
PURPOSE:To prevent the suction efficiency of a screw compressor from deteriorating and improve the performance by stopping to discharge oil into the suction side of the screw compressor when it is operated with the volume adjusted at 100%. CONSTITUTION:A solenoid valve 14 is provided in the middle of an oil feed pipeline 12 in an oil circuit. The said solenoid valve 14 is operated so as to be opened when the volume adjustment of a screw compressor 1 is set to 75%, 50% and closed when the volume adjustment is set to 100%. Therefore, when the volume of the screw compressor 1 is adjusted at 100%, the said solenoid valve 14 is closed and no oil flows into the suction port 3 of the screw compressor 1, thereby the deterioration of the suction efficiency of the screw compressor 1 due to the gasification of the refrigerant contained in the oil as experienced by the conventional technology is prevented and the performance can be exhibited by 100%. |
