Method and device for controlling oil return of compressor

Abstract

The embodiment of the invention discloses a method and device for controlling oil return of a compressor, relates to the field of air conditioners, and solves the problem that the unit performance of the air conditioner is degraded due to the bypass loss of superheated steam. The specific plan is: the oil return control device of the compressor includes an oil separator and an oil return pipeline, and an oil return valve is installed on the oil return pipeline. Determine the cumulative oil discharge volume of the compressor during the oil discharge time period. When the cumulative oil discharge volume reaches the preset oil discharge volume, determine the target opening according to the current operating frequency of the compressor, and control the oil return valve to open to the target opening. , according to the target opening and preset oil discharge volume, determine the corresponding oil return time of the compressor, and control the oil return valve to close when the opening time of the oil return valve reaches the oil return time of the compressor. The embodiment of the invention is used in the oil return process of the compressor.

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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