YDW series low noise centrifugal fan is a kind of high efficiency, the variable speed model of centrifugal fan, it by the advanced multi wing impeller, logarithmic spiral casing, speed installed directly connected external rotor three-phase asynchronous motor with low noise, circular arc streamline inlet and other components. The fan is made into double side air inlet, small volume, large air volume and small vibration. Motor with three-phase voltage regulator is buck, so as to realize the stepless speed regulation, to adapt to frequent changes in volume place, air conditioning, purification, refrigeration, automotive paint real industry ideal accessory products