Liquid shock preventing control method and device for air conditioner system and air conditioner system

Abstract

The invention discloses a liquid shock preventing control method and device for an air conditioner system and the air conditioner system. The method includes the following steps that the exhaust superheat degree of a compressor is obtained in real time, and the exhaust superheat degree is monitored in the running process of the air conditioner system; if the exhaust superheat degree is smaller than the first preset value and lasts for the first preset time, a timer is controlled to begin to conduct timing; and when the timing time of the timer reaches the second preset time, an outdoor unit of the air conditioner system is controlled to be stopped so as to prevent the liquid shocks from happening to the compressor. Thus, by means of the liquid shock preventing control method of the embodiment, it can be ensured that a refrigerant returning to and sucked by a compressor air returning opening is in a pure gas state by monitoring the exhaust superheat degree in the air conditioner system in real time, and therefore the liquid-state refrigerant is prevented from entering the compressor, and liquid shocks are avoided. In addition, the exhaust superheat value of the embodiment is large, data detection and control are facilitated, the liquid shock preventing control precision is improved, and safety and reliability of running of the air conditioner system are improved.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to an anti-liquid shock control method for an air conditioning system, an anti-liquid shock control device for an air conditioning system, and an air conditioning system. Background technique [0002] In the air conditioning system, factors such as excessive refrigerant or lubricating oil, excessive adjustment (opening degree) of the expansion valve (or regulating valve), and unstable heat load of the evaporator may cause liquid refrigerant to enter the compressor cylinder. The compressor will be subjected to liquid shock. Long-term and heavy liquid shock will cause deformation and rupture of the valve plate and other components of the compressor, and even cause permanent damage to the compressor. [0003] In related technologies, the superheat degree of the return air of the air conditioning system is mostly monitored in real time to ensure that the refrigerant inhaled by ...

AI Technical Summary

Problems solved by technology

However, the return air superheat value of the air conditioning system is generally small, which is not convenient for data detection and control, resulting in low accuracy and poor reliability of compressor anti-liquid shock control

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