Control system, control method and air-conditioning system for preventing air-conditioning compressor liquid shock

Abstract

The invention provides a control system and method for preventing liquid impacts of an air conditioner compressor and an air conditioner system. The air conditioner system comprises a flow adjusting valve (13) arranged at the position of the air suction end of the compressor (1) and used for adjusting the flow of refrigerants at the position. The control system comprises a detection unit, a calculation unit, a judgment unit and an execution unit, wherein the detection unit is used for detecting the refrigerant parameter value of an air conditioner and the parameter value of the compressor, the calculation unit is used for calculating the exhaust superheat degree fitted value of the air conditioner according to a detection result of the detection unit, the judgment unit is used for judging the relationship between the exhaust superheat degree fitted value and the preset value according to the calculation result of the calculation unit, and the execution unit is used for executing the flow adjusting valve adjustment on aperture increasing through opening or aperture reducing through closing according to the judgment result of the judgment unit. By means of the control system and method for preventing liquid impacts of the air conditioner compressor and the air conditioner system, the aperture of the flow adjusting valve can be adjusted according to the fact that whether the number of the refrigerants entering the compressor is too small or too large, the liquid impact phenomenon of the compressor is effectively prevented, and air suction liquid entrainment of the compressor is avoided.

Description

technical field [0001] The invention belongs to the technical field of compressors and air conditioners, and in particular relates to a control system, a control method and an air conditioner system for preventing liquid shock of an air conditioner compressor. Background technique [0002] At present, for the screw-type air-cooled heat pump system with a flooded shell-and-tube heat exchanger, because the refrigerant in the shell-side of the flooded shell-and-tube is used, the refrigerant injection volume is much larger than that of the dry-type shell-and-tube, which improves performance. While there are significant advantages in this aspect, the risk of compressor suction with liquid is also significantly increased. [0003] Since the air-conditioning system of the flooded shell-and-tube heat exchanger in the prior art has technical problems such as compressor suction and liquid, the present invention researches and designs a control system, control method and air-conditioni...

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Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect of the air-conditioning system in the prior art that the compressor is sucked with liquid, so as to provide a control system, a control method and an air-conditioning system for preventing liquid hammer of the air-conditioning compressor

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