"Mini Air Cooling Fan" will be spoiler bracket spindle, motor and bearings will also form a "blind spot", at least in close unfavorable 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, YEN SUN will be in the motor has been improved. The "Mini Air Cooling 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 reduced blind spots. "Mini Air Cooling Fan" improvement lies in the design of the rotor and the stator winding ring - Increase the size of the rotor ring, set in the entire blade, the stator winding are only two, installed with the circuit section in the frame of the inside corner.