Automatic oil return device of refrigeration system

Abstract

The invention relates to an oil return device of a refrigeration system, and particularly to an automatic oil return device of the refrigeration system. The automatic oil return device comprises an exhaust pipe, a compressor, an air suction pipe, an oil storage elbow, lubricating oil, an oil return pipe, an oil collection bag outlet pipe, an oil collection bag, and an oil collection bag inlet pipe, wherein the compressor is connected with a condenser, an expansion valve, an evaporator and the oil storage elbow sequentially in a closed loop; and the oil collection bag is arranged at the lowest point of the evaporator. The automatic oil return device of the refrigeration system has the advantages of preventing damage of the compressor due to oil starvation as return air of the compressor is utilized to take the lubricating oil back to the compressor, and being simple to control and install, reliable to run, and easy in productive operation.

Description

technical field [0001] The invention relates to a refrigeration device, in particular to a self-oil return device for a refrigeration system. Background technique [0002] During the operation of the refrigeration system, the condenser, evaporator and refrigerant delivery pipeline will store a part of the lubricating oil of the compressor. For the refrigeration system without oil separation device, when the lubricating oil discharged from the compressor with the high-pressure refrigerant gas passes through a refrigeration cycle and returns to the inside of the compressor, the amount of oil is too small to meet the lubrication requirements of the compressor, the compressor will Lack of oil occurs, causing insufficient lubrication. In the light case, it will cause the operation of the compressor to malfunction, and in the severe case, the parts will be worn and the compressor will be damaged. The existing refrigeration system utilizes the mutual solubility characteristics of ...

AI Technical Summary

Problems solved by technology

For the refrigeration system without oil separation device, when the lubricating oil discharged from the compressor with the high-pressure refrigerant gas passes through a refrigeration cycle and returns to the inside of the compressor, the amount of oil is too small to meet the lubrication requirements of the compressor, the compressor will Occurrence of oil shortage, resulting in insufficient lubrication, the mild case will cause the operation of the compressor to malfunction, and the serious case will wear parts and damage the compressor

The existing refrigeration system utilizes the mutual solubility characteristics of refrigerant and lubricating oil. When the compressor inhales the refrigerant, it also sucks the lubricating oil in the suction air back to the crankcase of the compressor. Since the lubricating oil in the refrigeration system is used for a long time The ability to dissolve the refrigerant will decrease, and the impure refrigerant used in the refrigeration device will result in ineffective oil return

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