AIR VOLUME CALCULATION SYSTEM FOR VARIABLE SPEED OR CONSTANT SPEED FAN

摘要

Disclosed is an air volume calculation system for a variable speed or constant speed fan, comprising a central processing control system, an upper processing system, a moving vane angle indication transmitter (3) of the fan, an entrance pressure transmitter (14) of the fan, an entrance air temperature transmitter (15) of the fan, an exit pressure transmitter (16) of the fan, a motor current transformer (17) of the fan and a DCS control system (11) of the fan; wherein the moving vane angle indication transmitter (3) of the fan, the entrance pressure transmitter (14) of the fan, the entrance air temperature transmitter (15) of the fan, the exit pressure transmitter (16) of the fan and the motor current transformer (17) of the fan are separately connected to the signal input end of the central processing control system; and the signal input end of the central processing control system is connected to the DCS control system (11) of the fan. The system can decrease the installation complexity of the air volume measurement device, reduce the resistance loss caused by the air volume measurement device, reduce the air volume measurement error, increase the reliability of safe running and add an online air volume characteristic monitoring function.