Oil return control method and oil return control system for compressor system

Abstract

The invention provides an oil return control method and an oil return control system for a compressor system. The compressor system comprises a compressor, an oil separator connected with an exhaust port of the compressor and an oil return electromagnetic valve connected between an oil outlet of the oil separator and an air return port of the compressor. The oil return control method comprises the following steps: when receiving an instruction of starting the compressor, controlling the oil return electromagnetic valve to open; during an operating process of the compressor, if the opening time of the oil return electromagnetic valve reaches a first preset time every time, controlling the oil return electromagnetic valve to close, and after a second preset time, controlling the oil return electromagnetic valve to reopen until receiving an instruction of shutting down the compressor. According to the technical scheme, the system and the method are capable of ensuring that lubricating oil returned to the compressor has a relatively low temperature and furthermore ensuring that an air conditioner always keeps a favorable heat exchange effect.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to an oil return control method for a compressor system and an oil return control system for a compressor system. Background technique [0002] With the continuous improvement of living standards, air conditioners have become one of the most commonly used household appliances in daily life. The working principle of the air conditioner is to use the compressor to compress the refrigerant, and to achieve the purpose of cooling and heating through the continuous heat absorption and release of the refrigerant. Among them, the compressor needs lubricating oil to lubricate its own components during the mechanical movement of compressing the refrigerant, so as to prevent mechanical failure caused by long-term wear and tear, thereby improving the service life of the compressor. [0003] In the process of compressing the refrigerant in the compressor, in order to avoid the lubricat...

AI Technical Summary

Problems solved by technology

Since the above-mentioned oil return method is an uninterrupted oil return method, that is, the oil and high-temperature gas are separated and returned directly to the compressor, but because the oil temperature separated by the oil separator 2 is relatively high, which is close to the exhaust temperature of the compressor, so , if it is directly returned to the air return port of the compressor, the return air temperature of the compressor will remain high, which will affect the heat exchange effect of the entire air conditioner system

[0005] Therefore, how to reduce the oil return temperature of the compressor and avoid the high oil return temperature from affecting the heat exchange effect of the air conditioner has become a technical problem to be solved urgently

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