Air conditioner oil return system, method and air conditioner

Abstract

The invention discloses an air conditioner oil return system, a method and an air conditioner. The problem that because the oil return temperature is too high in the oil return process of the air conditioner in the related art, the heat exchange effect of the system is influenced is solved. The air conditioner oil return system comprises a first oil separator, a first oil return pipeline and a controller, wherein an inlet of the first oil separator is connected with an exhaust port end of a compressor in the air conditioner, and the first oil separator is used for receiving oil-gas mixture discharged by the compressor connected with the first oil separator and separating the oil-gas mixture. The oil return pipeline is used for conveying the oil separated by the first oil separator to a compressor in the air conditioner. The controller is used for controlling the air conditioner to run when the air conditioner returns oil, and the air supplementing flow of the air supplementing loop ofthe compressor is adjusted according to the air supplementing superheat degree of the compressor in the air conditioner, so that the oil return temperature of the air conditioner is reduced. Accordingto the system and the method, the problem that because the system oil return temperature is too high, the system heat exchange effect is influenced is solved.

Description

technical field

[0001] The invention relates to the technical field of air conditioners, in particular to an oil return system and method for an air conditioner and an air conditioner. Background technique

[0002] Compressor lubricating oil is a substance that lubricates the moving parts of the compressor. It is soluble in the refrigerant and flows in the air conditioning system with the refrigerant. During the operation of the air conditioner, the lubrication in the compressor will enter the heat exchanger with the refrigerant and partly remain in the heat exchanger, which may cause the lack of lubricating oil in the compressor, causing the compressor motor bearing and the compression chamber to be out of order. To effective lubrication, affect the performance and reliability of the compressor, or even burn the compressor. Therefore, during the operation of the air conditioner, it is usually necessary to separate the lubricating oil from the refrigerant through the oil re...

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