1. Cooling effect: The sprayed oil is in the form of droplets, mixed with the compressed gas, and the large heat exchange surface quickly absorbs the compression heat of the gas, cooling the compression medium and greatly reducing the exhaust temperature.

2. Lubrication function: In a dry screw compressor, the two rotors do not contact each other and rely on high-precision synchronous gears to maintain clearance. In oil injected compressors, due to the presence of a large amount of oil and the fact that the female rotor only absorbs a small portion of the total compression power consumption, the synchronous gear can be omitted, allowing the male rotor to directly drive the female rotor. In addition, since the injected oil is exactly the same as the lubricating oil used for the bearings, there is no need to use a complex order sealing device to separate the gas from the lubricating oil. This allows the distance between the rotor support bearings to be smaller, significantly improving the stiffness of the rotor and reducing deformation.