Oil return control method for compressor system, air conditioner and compressor

Abstract

The invention provides a compressor system, an air conditioner and a compressor oil return control method, wherein the compressor system includes: a compressor; a lubricating oil separator connected to the exhaust port of the compressor through a pipeline, The condensate discharged from the compressor is separated from the lubricating oil, and the lubricating oil outlet of the lubricating oil separator is connected to the air return port of the compressor through a pipeline; the electronic expansion valve is set at the lubricating oil outlet of the lubricating oil separator, and through adjusting The opening angle of the lubricating oil separator controls the return speed of lubricating oil in the lubricating oil separator; the temperature detection unit, connected to the control unit, is set on the compressor to detect the temperature in the compressor; the control unit, connected to the electronic expansion valve, according to the compression The temperature inside the machine controls the electronic expansion valve to adjust the opening angle. The invention can flexibly adjust the opening angle of the electronic expansion valve according to the temperature in the compressor, so as to ensure that the amount of lubricating oil in the compressor is in a relatively stable state.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to a compressor system, an air conditioner and an oil return control method for a compressor. Background technique [0002] In the related art, the compressor of the air conditioner controls the oil return through the capillary tube, and the oil return speed cannot be flexibly adjusted according to the temperature in the compressor, which may easily cause damage to the compressor system. [0003] For example, when the compressor is running at a low temperature (at this time, the temperature inside the compressor is low), the lubricating oil becomes viscous, the oil return speed of the capillary decreases, and even the capillary is blocked, and the lubricating oil Failure to return to the crankcase of the compressor in time may cause oil shortage in the system, cause wear to the compressor, and affect the service life of the compressor; and when the compressor is running at ...

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Problems solved by technology

[0002] In the related technology, the compressor of the air conditioner controls the oil return through the capillary tube, and the oil return speed cannot be flexibly adjusted according to the temperature in the compressor, which is easy to cause damage to the compressor system

[0003] For example, when the compressor is running at a low temperature (at this time, the temperature inside the compressor is low), the lubricating oil becomes viscous, the oil return speed of the capillary decreases, and even the capillary is blocked, and the lubricating oil Failure to return to the crankcase of the compressor in time may cause oil shortage in the system, cause wear to the compressor, and affect the service life of the compressor; and when the compressor is running at a high temperature (the Higher temperature), the return speed of lubricating oil is faster, in order to maintain the oil quantity in the crankcase in the compressor in a stable state, it is also necessary to control the return speed of lubricating oil

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