Micro radiator fan device

Abstract

The invention relates to a micro radiating fan device, mainly consisting of a main body, a rotating shaft, at least one planar coil, at least one permanent magnetic magnet, a plurality of blades and at least one magnetic conductive back iron, wherein, the rotating shaft is pivotally arranged on the main body; the planar coil is arranged in the main body and adopts the way of wave winding; the permanent magnetic magnet is connected with the rotating shaft, is roughly parallel to the planar coil and can produce a staggered and multi-polar magnetic field; a plurality of blades are arranged on the centrifugal blades of the permanent magnetic magnet around the core of the rotating shaft, form an integral body with the permanent magnetic magnet and can synchronously rotate with the permanent magnetic magnet; the magnetic conductive back iron is arranged on one side of the planar coil and has a geometric shape corresponding to the wave forms of the planar coil; in addition, the planar coil is provided with at least one permeable part inside which a hall inductor is arranged; by adopting the structure, the micro radiating fan device achieves the purposes of being thinner, improving convection efficiency and increasing flux density, etc.

Description

technical field [0001] The invention relates to a micro-radiation fan device, in particular to a micro-radiation fan device in which centrifugal blades and permanent magnets are integrally formed, and a planar coil is equipped with a special geometrically designed magnetically conductive back iron. Background technique [0002] In response to the thinning trend of electronic products, portable products such as notebook computers, 3G mobile phones and PDA mobile phones are widely used. The higher the demand level of the central processing unit (CPU), the higher the requirement for heat dissipation performance. Generally, heat dissipation modules It is mainly composed of cooling fan, heat pipe, and cooling fins. The heat generated by electronic components is transferred to the cooling fins through the heat pipe, and then dissipated into the atmosphere. The cooling fan can provide convection effect and improve heat transfer efficiency. [0003] The traditional cooling fan is to...

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Problems solved by technology

[0004] Others use microplanar coils, but the number of turns and poles is relatively low, the manufacturing cost of the coil is relatively high, and it lacks a proper magnetic back iron structure. When used with high-speed centrifugal blades, the torque is slightly insufficient.

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