High pressure injection oil return automobile air conditioner

Abstract

The invention relates to an automobile air conditioner, in particular to a high pressure injection oil return automobile air conditioner, which comprises an injector, a compressor, a solenoid valve, a first oil collecting bag, a condenser, a second oil collecting bag, an evaporator and an expansion valve, and is characterized in that: the compressor, the condenser, the expansion valve and the evaporator are in closed-loop connection in turn; the first oil collecting bag is arranged at the lowest point of the evaporator; and the second oil collecting bag is arranged at the lowest point of the condenser. The high pressure injection oil return automobile air conditioner has the advantages that: lubricating oil is brought back to the compressor through the high pressure of the condenser, and the oil lack of the compressor is prevented; and the high pressure injection oil return automobile air conditioner is easy to control, reliable in operation, easy to mount and suitable for production operation.

Description

technical field [0001] The invention relates to an automobile air conditioner, in particular to an automobile air conditioner with high-pressure ejection and oil return. Background technique [0002] During the operation of the automobile air conditioning system, the condenser, evaporator and refrigerant delivery pipeline will store a part of the lubricating oil of the compressor. For automotive refrigeration and air-conditioning systems without oil separation devices, when the lubricating oil discharged from the compressor with high-pressure refrigerant gas passes through a refrigeration cycle, the amount of oil returned to the interior of the compressor is too small to meet the lubrication requirements of the compressor. The compressor will be short of oil, which will cause insufficient lubrication. The light one will cause the compressor to malfunction, and the severe one will wear out the parts and damage the compressor. The existing automobile refrigeration and air-con...

AI Technical Summary

Problems solved by technology

For automotive refrigeration and air-conditioning systems without oil separation devices, when the lubricating oil discharged from the compressor with high-pressure refrigerant gas passes through a refrigeration cycle, the amount of oil returned to the interior of the compressor is too small to meet the lubrication requirements of the compressor. The compressor will be short of oil, which will cause insufficient lubrication. The light one will cause the compressor to malfunction, and the severe one will wear out the parts and damage the compressor.

The existing automobile refrigeration and air-conditioning system utilizes the mutual solubility characteristics of refrigerant and lubricating oil. The ability of lubricating oil to dissolve refrigerant after long-term use will decrease, and the refrigerant used in automobile air conditioners will be impure, which will cause ineffective oil return.

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