Patent ID: 8253293

Claim:
A magnetic fan device comprising: a stator; at least three bearings fixed on the stator, wherein the at least three bearings are permanent magnets; a rotor fixed to the stator, and comprising a shaft and a plurality of impellers rotatably connected to the shaft; a motor electrically connected to the rotor, and configured for driving the plurality of impellers to rotate about the shaft; and at least three magnetic posts with an opening at their lateral surfaces, and configured for respectively receiving the at least three bearings by the opening; wherein a first magnet is adhered to ends of the at least three magnetic posts, and a second magnet is adhered to opposite ends of the at least three magnetic posts, the magnetic pole of the first magnet adjacent to ends of the at least three bearings is opposite to the magnetic pole of the second magnet adjacent to opposite ends of the at least three bearings.