"Axial Fan" fluid from the centrifugal force, so that the centrifugal force due to the increased static pressure could be zero, so it can produce much lower than the first centrifugal fan. It is generally suitable for large flow of low lift place a high specific speed range. "Axial Fan" kind of image is a schematic axial flow pumps and fans, when the prime mover is immersed in the working fluid in the rotation of the impeller, the impeller blade is relatively fluid effects a lift, while at the same time the blade to lift the size of a fluid equal and opposite reaction, called thrust, "Axial Fan" this blade thrust acting on the fluid energy of the fluid increases.