Method and device for controlling oil return of compressor

Abstract

The invention discloses a method and a device for controlling oil return of a compressor, and relates to the field of air conditioners. The problem that the performance of the unit of the air conditioner is reduced due to the bypass loss of the superheated steam is solved, the specific scheme is as follows, the control device for the oil return of the compressor comprises an oil separator and an oil return pipeline, a liquid level monitoring module is arranged in the oil separator, an oil return valve is installed on the oil return pipeline, after the compressor is started, whether the lubricating oil with the preset oil discharging amount is discharged into the oil separator, the target height of the oil separator is determined, the height of the oil surface of the oil separator is detected to reach the first end of the liquid level monitoring module, the target opening degree is determined according to the corresponding relation between the operation frequency of the compressor and the opening degree of the oil return valve, the oil return valve is controlled to be opened to the target opening degree, when the oil level of the oil separator is detected to reach the lowest end ofthe liquid level monitoring module, the oil return valve is controlled to be closed. The method and the device for controlling oil return of the compressor is used in the process of oil return of thecompressor.

Description

technical field [0001] The embodiments of the present invention relate to the field of air conditioners, in particular to a method and device for controlling oil return from a compressor. Background technique [0002] The compressor is called the heart of the refrigeration system, its reliability and service life directly affect the refrigeration system, but poor oil return is an important factor that damages the compressor, so how to reasonably control the oil return of the compressor becomes the key to protecting the compressor. [0003] figure 1 A composition schematic diagram of an air conditioner provided for the prior art, such as figure 1 As shown, the air conditioner may include a control module, a compressor, an oil separator and an oil return pipeline, and an oil return capillary and an oil return solenoid valve are installed on the oil return pipeline. Wherein, the oil separator is located at the discharge end of the compressor, and the oil return port is locate...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a method and device for controlling oil return of a compressor, which solves the problem that the unit performance of an air conditioner is degraded due to the bypass loss of superheated steam

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