A device and method for improving compressor operation reliability

Abstract

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. Including controller, compressor, four-way valve, outdoor air-cooled heat exchanger, first outdoor unit cut-off valve, second outdoor unit stop valve, first heat exchanger and detection device, the detection device obtains the exhaust superheat and controls The controller adjusts the opening degree of the flow regulating valve connected to the first heat exchanger according to the degree of superheat of the exhaust gas, thereby controlling the flow rate of the gaseous refrigerant entering the first heat exchanger, increasing the degree of superheat of the return air, and making the flow rate of the gaseous refrigerant discharged from the compressor Exhaust superheat meets requirements. The device and method of the present invention can heat the liquid / gas low-temperature refrigerant flowing to the compressor, so that the superheat degree of the gaseous refrigerant discharged from the compressor can meet the requirements, so that the air conditioner can maintain a stable discharge regardless of the ambient temperature. Air superheat, thereby enhancing the stability and reliability of the long-term operation of the air conditioner.

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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