Reversed Core Heat Dissipation Fan for Reduced Thickness
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional heat dissipation fans face challenges in thinning due to the axial space occupied by the height of the upwardly-protruded inner edge of the core inserting hole, which limits the reduction of fan thickness.
Innovation Solution
A thinned heat dissipation fan design with a core reversely installed, where the core is welded directly or through a sleeve seat using laser welding, reducing the axial space occupied and allowing for a thinner profile.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the core inserting hole is upwardly protruded for clamping and fastening the core, then the combining strength of the core and the metal shaft seat is improved, but the axial space is occupied increasing the fan thickness
Solution Approach 1:
The core inserting hole is inverted from the conventional upward protrusion design to a downward protrusion design. The inner edge of the core inserting hole is downwardly protruded to clamp and fasten the bottom surface of the core, reversing the direction of the protrusion to avoid occupying axial space while maintaining fastening function. This inversion resolves the contradiction by achieving the same clamping strength without increasing fan thickness.
Solution Approach 2:
The downward protrusion of the inner edge of the core inserting hole is designed with controlled height that is not overly protruded. This partial action provides sufficient clamping force for fastening the core while limiting the protrusion height to minimize axial space occupation, thereby balancing the fastening strength requirement with the thickness reduction goal.
2Length of stationary object
If the core inserting hole protrusion height is overly low, then the axial space is saved, but the combining strength is insufficient
Solution Approach 1:
The downward protrusion height is optimized to provide just enough clamping force for reliable core fastening without excessive protrusion. This controlled partial action achieves the minimum necessary protrusion height to ensure adequate combining strength while keeping the axial space occupation minimal, thus resolving the contradiction between strength and thickness.
3Length of stationary object
If the heat dissipation fan is thinned, then the product thickness is reduced, but the core fastening structure cannot provide sufficient combining strength
Solution Approach 1:
By inverting the core fastening structure to use downward protrusion instead of upward protrusion, the design enables thinning of the heat dissipation fan while maintaining adequate core fastening strength. The downward protrusion clamps the bottom surface of the core effectively within the reduced thickness profile, resolving the contradiction between fan thinning and fastening strength.
Solution Approach 2:
The downward protrusion is designed with optimal height that provides sufficient clamping force for core fastening in the thinned configuration. This controlled partial protrusion ensures adequate combining strength while accommodating the reduced fan thickness, thereby resolving the contradiction between thinning and fastening capability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables a further reduction in the height of the heat dissipation fan by minimizing the axial space occupied by the core inserting hole, facilitating thinner designs and supporting massive production with stable welding performance.
Implementation Method 1
the bottom end of the core is welded in the core welding hole of the sleeve seat with a laser welding means
Data Source
AI summary
A thinned heat dissipation fan with core reversely installed includes: a base including a bottom plate and a lateral wall formed at the periphery of the bottom plate; a circuit unit disposed on the bottom plate; a core welded in a core welding hole formed on the bottom plate of the base or welded in a core welding hole of a sleeve seat fastened on the base; and a rotor set including a hub, a plurality of blades disposed at the periphery of the hub, a bearing module and a permanent magnet disposed at the inner sides of the plural blades, wherein the hub is formed with a bearing opening, the bearing module is fastened in the bearing opening, and the core is inserted in the bearing module. The above-mentioned welding means is preferably to be a laser welding means.