220V Cooling Fan fan in the end a few pieces of good?

"220V Cooling Fan" everyone has used every year, desktop and floor-standing, remote ...... but you found before? Fan blades each generation are changing, the more common include clover fan; four-leaf fan; five-leaf fan;?? So how to design fan blades more reasonable choice a few slices of somatosensory it most comfortable five-leaf design of "220V Cooling Fan" is the use of an aircraft wing, propeller principle compared to conventional three-blade fans will increase the load capacity and load, which has more broad-range of air and wind adjustment can also add more stalls, and noise will be reduced. In short "220V Cooling Fan" fan more, you can put the "wind" cut more pieces, so the wind blowing out a softer, more muted effect.