OIL-COOLED AIR COMPRESSOR AND CONTROL METHOD THEREOF

摘要

PROBLEM TO BE SOLVED: To improve performance of an oil-cooled air compressor such as an amount of discharged air, energy saving performance, and prevention of thermal deterioration of lubricating oil.SOLUTION: An oil-cooled air compressor 1 comprises a compressor body 2 and an oil separating/recovering device 3. An oil reservoir of the oil separating/recovering device 3 is connected to a suction port 2c of the compressor body 2 via an oil supply passage 7. The compressor body 2 is provided with a cooling water supply passage 31 that supplies cooling water. The cooling water is supplied to the compressor body 2 to cool sucked air so that a temperature of compressed air discharged from a discharge port 2d of the compressor body 2 is equal to or less than a dew point.