Heat dissipation fan of magnetic suspension structure

A heat dissipation fan of a magnetic suspension structure, comprising:

• a fan frame, the fan frame being a plastic object, the fan frame comprising a base portion and a circumferential wall portion enclosing the base portion, the base portion having a central portion that is raised upward to form a central shaft, the central shaft being formed with a shaft bore;
• a motor coil, the motor coil being mounted on an outer circumference of the central shaft and is conductively connected to a printed circuit board (PCB);
• a fan blade assembly, the fan blade assembly comprising a hub portion and blades extending outward from the hub portion in a radial direction, the hub portion being provided with an axle core and a rubber magnet, the fan blade assembly being mounted, in a rotatable manner, in the fan frame in such a way that the axle core is in alignment with and mounted into the shaft bore of the central shaft, the rubber magnet being arranged to surround and enclose a circumference of the motor coil;
• and
• an iron plate, the iron plate being fixed to the base portion of the fan frame through injection molding such that an orthographic projection of the rubber magnet is cast on the iron plate, wherein the iron plate is in alignment with rubber magnet in a vertical direction to generate a first magnetic force in the vertical direction acting between the base portion of the fan frame to which the iron plate is fixed and the fan blade assembly on which the rubber magnet is arranged,
• wherein a second magnetic force is generated between the rubber magnet and the motor coil and magnetic interaction among the rubber magnet, the motor coil, and the iron plate creates an operation environment of magnetic suspension and magnetic attraction induced by the first and second magnetic forces, and the fan blade assembly is operated for rotating in such an operation environment,
• wherein the iron plate and the PCB are arranged such that the iron plate is separated from the PCB and the rubber magnet and the iron plate are located on two opposite sides of the PCB to correspond to each other in the vertical direction, and
• wherein the iron plate is fully enclosed and embedded in the base portion of the fan frame.