Oil-based lubrication is the most common type of lubrication used in refrigeration compressors. In this system, oil is circulated throughout the compressor to provide a layer of lubrication between the moving parts. The oil also helps to cool the compressor and remove any debris or contaminants that may be present.
Oil-less lubrication is a newer technology that is becoming increasingly popular in refrigeration compressors. In this system, a special coating is applied to the moving parts of the compressor to reduce friction and wear. This eliminates the need for oil, which can reduce maintenance costs and improve the efficiency of the compressor.
The type of lubrication system used in a refrigeration compressor will depend on the specific design of the compressor and the application for which it is being used.