"220V Cooling Fan" in order to improve efficiency, three-dimensional flow impeller has been more widely used in large industrial fan through. Others, such as large industrial fan oblique flow and other special-purpose large industrial fans will be more market development. High-speed miniaturized. After all kinds of large industrial fan with three-dimensional flow impeller, improve efficiency, the pressure can be improved. Therefore, under the same conditions, the impeller diameter can be reduced by 10% to 30%, so it has made to reduce the dual effect of reducing the volume and weight. Increase the speed is super important way of miniaturized industrial "220V Cooling Fan". Noise reduction. Large industrial fan noise is one of the major sources of noise pollution in industrial production. Large industrial fans large-scale and high speed also makes the noise problem is very prominent. Low-frequency noise, large industrial "220V Cooling Fan" major improvements large industrial fan design, reduce body noise, if below standard, can be taken through measures such as the installation of a muffler.