Refrigerated oil recovery device and method

Abstract

The invention provides a refrigerant oil recycling device. The refrigerant oil recycling device comprises an oil storage tank, an oil filter, an oil pump, a vacuum pumping apparatus and a controller; the oil storage tank, the oil filter and the oil pump are sequentially connected to form an oil-way circulation loop, a first outlet of the oil storage tank is connected with an inlet of the oil filter, an outlet of the oil filter is connected with an inlet of the oil pump, and a first inlet of the oil storage tank is connected with an outlet of the oil pump; the upper end of the oil storage tank is connected with the vacuum pumping apparatus, and the vacuum pumping apparatus is used for conducting vacuum-pumping on the oil storage tank; the controller is electrically connected with the oil pump and the vacuum pumping apparatus, and the controller controls the starting and the closing of the oil pump and the vacuum pumping apparatus. The invention further relates to a refrigerant oil recycling method. The refrigerant oil recycling device and method have the advantages that the usage amount of refrigerant oil in a test process is reduced, and therefore the factory cost of air conditioners is saved, the automatic control of the recycling process is achieved, and the labor force is saved.

Description

technical field [0001] The invention relates to a recovery device, in particular to a refrigeration oil recovery device and method. Background technique [0002] Refrigeration oil is a kind of oil used for lubricating various moving parts in the refrigeration compressor. It is compatible with all parts of the refrigeration system, and the oil film formed between the friction surfaces seals important gaps. A large number of air-conditioning compressors, such as screw machines, need to undergo functional testing before leaving the factory, and refrigeration oil is required for testing. The frozen oil after the test contains a lot of impurities, including solid debris and excess water gas, etc. The existence of impurities and water in the frozen oil will destroy the frozen oil film, make the lubrication effect worse, and accelerate the corrosion of organic acids on metals. It will also cause the additive to undergo hydrolysis reaction and become invalid, resulting in precipita...

AI Technical Summary

Problems solved by technology

The frozen oil after the test contains a lot of impurities, including solid debris and excess water gas, etc. The existence of impurities and water in the frozen oil will destroy the frozen oil film, make the lubrication effect worse, and accelerate the corrosion of organic acids on metals. It will also cause the additive to undergo hydrolysis reaction and become invalid, resulting in precipitation, blocking the oil circuit, and hindering the circulation and supply of refrigeration oil, so it cannot be reused

[0003] The current treatment method is to directly discard the impurity-containing refrigeration oil after the test once, and each compressor will waste about 30L of refrigeration oil for each test. Due to various problems, the test may be carried out 2 to 5 times, and the amount of waste It is very large, which increases the factory cost of the air conditioner accordingly

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