Oil free air compressor on the fuselage and the surrounding environment cleanliness requirement is very high, every 2000 h operation, to eradicate the cooling surface dust, the fan bracket must be cooler on scavenging hole cover open, with blowing dust gun to purge of cooler, until the cooling dust purging clean appearance.Without oil cooler of air compressor in the work after a period of time, due to the calcium, magnesium carbonate, such as material in the cooling water will form scale in them, the serious influence the cooling effect, eventually lead to exhaust temperature rises.This not only affects daily use of gas, but also causes energy consumption to rise.Therefore, regular cleaning is required.