"220V AC Cooling Fan" will be spoiler bracket spindle, motor and bearings will also form a "blind spot", at least not at close range Min airflow cover the entire heat sink, if not eliminate, it should minimize the blind spot area. But with current technology, bearings for rotating blades remain indispensable, "220V AC Cooling Fan" will be in the motor has been improved. YEN SUN's Tip Magnetic Driving (TMD -_- b) FAN fan drive motor is placed outside the box, instead of the traditional axis, leaving only the center of the bearing part, the increase of wind area, even more significantly reduce blind spots TMDFan the main improvement lies in the design of the rotor and the stator winding ring - Increase the size of the rotor ring, set in the whole "220V AC Cooling Fan" leaf, only two stator windings, installed in a corner of the frame with the circuit section inside.