Air volume calculation system for variable speed or constant speed fan

摘要

Abstract The utility model provides a variable or fixed speed fan flow computing systems. The system includes central processing control system, host processing system, wind motorized leaf angle transmitter, fan motor current transformer and fan control system. Central processing control signal input terminal connected to wind motorized leaf angle transmitter, fan inlet pressure transmitter, fan inlet air temperature transmitter, fan outlet pressure transmitter and fan motor current transformer. Central processing control signal output terminal connected to fan control system. The utility model is a method of calculating the air volume air flow measurement device instead of the original method. Its advantages is that reduce air flow measurement device installation complexity, reduce the resistance loss caused of air flow measurement device, reduce wind measurement error, increase the reliability of safe operation and increase the amount of wind characteristics online monitoring capabilities. WO 2012/129749 PCT/CN2011/001923 r5 I~ 9o