What is the primary function of a compressor’s oil separator?

The primary function of a compressor’s oil separator is to separate oil from refrigerant vapor, ensuring proper lubrication without excessive oil in the refrigerant circuit. In a refrigeration system, compressors often use oil to lubricate their moving parts. However, as the refrigerant vapor circulates through the system, it can carry some oil with it.

Having too much oil in the refrigerant circuit can lead to a reduction in heat transfer efficiency, as oil is not an effective heat transfer fluid. It can also cause issues like flooding of the evaporator and reduced cooling capacity. Therefore, the oil separator plays a crucial role by allowing the vaporized refrigerant to return to the system while effectively capturing and draining the oil back to the compressor. This process maintains optimal lubrication while preserving the efficiency of the refrigeration system.

The other options relate to functions that are not typically associated with an oil separator. Mixing oil and refrigerant, heating refrigerant, or preventing refrigerant leaks are jobs handled by different components within the refrigeration system.