Automotive air conditioning motor-driven oil return device

Abstract

The invention relates to an automotive air conditioning oil return device, and in particular relates to an automotive air conditioning motor-driven oil return device comprising a compressor exhaust pipe, a compressor, a compressor return pipe, a liquid pump exhaust pipe, a liquid pump, a liquid pump suction pipe, a controller, an oil collecting bag, a liquid level sensor and an evaporator pipeline, wherein the oil collecting bag is arranged at the lowest point of the evaporator pipeline; the liquid pump exhaust pipe of the liquid pump is connected with a crank case of the compressor; and the liquid pump suction pipe is connected with the bottom of the oil collecting bag. The automotive air conditioning oil return device has the advantages that the liquid pump is utilized to pump lubricants back to the compressor so as to prevent the oil starvation of the compressor; the control is easy and the running is reliable; and the installation is simple and the production operation is easy.

Description

technical field [0001] The invention relates to an oil return device for an automobile air conditioner, in particular to an electric oil return device for an automobile air conditioner. technical field [0002] Type the technical field description paragraph here. Background technique [0003] 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...

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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