Oil feed type air compressor

An oil feed air compressor comprising:

• a compressor body compressing air while feeding an oil into a compression chamber;
• a separator separating a compressed air discharged from the compressor body and an oil contained in the compressed air;
• a compressed air-feeding system feeding the compressed air separated by the separator to a use destination of the compressed air;
• an oil-feeding system feeding the oil separated by the separator to the compression chamber of the compressor body;
• an oil cooler and a temperature sensor disposed in the oil-feeding system;
• and
• a controller enabling execution of a temperature control for variably controlling a cooling power of the oil cooler such that an oil temperature detected by the temperature sensor is a target value, wherein
• in the temperature control by the controller,
• during a load operation, the cooling power of the oil cooler is variably controlled such that the oil temperature detected by the temperature sensor is a first target value, and
• during an unload operation, the cooling power of the oil cooler is variably controlled such that the oil temperature detected by the temperature sensor is a second target value lower than the first target value.