"220V AC Cooling Fan" is not a surprising thing, has long been commonplace in everyday life, has a variety of uses diversion, ventilation, cooling and so on. On the type of fan used for air-cooled radiator fan brush less DC -DC Brush less Fan (if not otherwise specified hereinafter, referred to as "fan") slightly introduction. Typically used in air-cooled heat sink "220V AC Cooling Fan" shape is a flat bottom surface of a square column, leaving the four corners of the mounting holes required for installation, the DC motor through the bracket on the frame, connected to the rotor blades together, through bearings mounted on the motor body. Some "atypical" of "220V AC Cooling Fan" with a more specific shape and design, but the overall structure and this is not much difference.