Device and method for improving running reliability of compressor

Abstract

The invention relates to the field of air conditioner control, in particular to a device and method for improving running reliability of a compressor. The device comprises a controller, the compressor, a four-way valve, an outdoor air cooling heat exchanger, a first outdoor unit stop valve, a second outdoor unit stop valve, a first heat exchanger and a detection device. The detection device acquires the discharge superheat degree; the controller adjusts the opening degree of a flow adjusting valve connected with the first heat exchanger according to the discharge superheat degree, and therefore the flow of gaseous refrigerant entering the first heat exchanger is controlled, the superheat degree of return air is improved, and the discharge superheat degree of the gaseous refrigerant discharged out of the compressor is made to meet requirements. According to the device and method, the liquid / gaseous refrigerant flowing to the compressor can be heated, and the discharge superheat degree of the gaseous refrigerant discharged out of the compressor is made to meet the requirements, so that the stable discharge superheat degree of an air conditioner can be kept at any environment temperature; therefore, the long-time running stability and reliability of the air conditioner are enhanced.

Description

technical field [0001] The invention relates to the field of air conditioning control, in particular to a device and method for improving the operating reliability of a compressor. Background technique [0002] With the continuous development of society and the continuous improvement of people's living standards, the use of air conditioners has become a necessity in human life to improve the office environment; at the same time, air conditioners have been widely used in different occasions such as homes, hotels, restaurants, offices, factories, and computer rooms. During use, due to the ever-changing ambient temperature, the ambient temperature in many cases has exceeded the operating range of ordinary air conditioners, especially for low-temperature conditions that still require air-conditioning refrigeration (low-temperature refrigeration), or outdoor units that are heated by ultra-low temperature air conditioners. frost. As the core component of the air-conditioning syst...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a device and method for improving the reliability of compressor operation, which solves the problem of insufficient exhaust superheat in the prior art when low-temperature refrigeration or low-temperature heating requires defrosting, etc. The technical problem that the compressor is damaged due to the return flow of liquid refrigerant to the compressor

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