Due to the presence of water vapor in the air, the water vapor content in compressed air will increase. If it is below the pressure dew point, water vapor in the air will condense into water and mix with lubricating oil, causing dilution and deterioration of the lubricating oil. The deterioration of lubricating oil can cause lubrication failure, resulting in bearing operation failure, component rusting, and ultimately leading to serious accidents such as compressor jamming. The controller of this compressor has a water removal function, and the factory has set the clear water temperature. This function takes effect when the clear water temperature is not reached. At this point, it is equivalent to unloading mode (The clear water time depends on the operating conditions and may run for a considerable amount of time). After the time reaches or reaches the set water removal temperature and the exhaust pressure reaches the shutdown pressure, the compressor stops.