"220V AC Cooling Fan" There are hundreds of pieces of vanes on the impeller, which is similar to a large gas turbine impeller, a vortex when the fan impeller rotation, "220V AC Cooling Fan" among the vanes of the air subjected to the action of centrifugal force, toward the impeller the movement of the edge, where the air enters the annular cavity of the pump body, and then returns to the impeller, again starting from the leaves of "220V AC Cooling Fan" in the same manner and for circular motion, since the air is uniformly accelerated, the impeller is rotated the circulating air current generated by the air in the form of a spiral sprang, so the air leaving the pump at very high energy, for use.