"220V AC Cooling Fan" axial fans, although widely used, but there are inherent flaws. Axial fan motor position by blocking the air flow is not flowing through the middle of the blast area, which is called "dead zone." In a typical heat sink, the highest temperature precisely the middle of the fin. Because of this conflict, when the use of axial fans, cooling effect of the heat sink is not sufficient. "220V AC Cooling Fan" centrifugal fan axial fan with a completely different form of the blast, are also beginning to be used in CPU cooling among computer users is often referred to as "turbo-fan." This "220V AC Cooling Fan" strengths are a good solution to the "dead zone" problem. The centrifugal fan is different from the traditional fan whose blades are rotating in the vertical plane is carried out, the air inlet located on the side of the fan.