Heat dissipation fan
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Solution Overview
Problem
Notebook computer heat dissipation fans face challenges due to high thermal resistance and insufficient air intake, leading to inadequate wind pressure and backflow, which affects heat dissipation efficiency.
Innovation Solution
A heat dissipation fan design that creates at least one flow path between blades with a reduction section, increasing air pressure by shaping the flow path to enhance airflow pressurization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the number of heat dissipation holes is minimized to maintain a light and thin notebook computer appearance, then the device maintains its aesthetic and portability, but the thermal resistance of the system increases, reducing air intake and heat dissipation efficiency
Solution Approach 1:
The patent changes the geometric parameters of the fan blades by introducing a reduction section that narrows the air gap between adjacent blades. This parameter modification increases wind pressure and improves airflow control, enabling effective heat dissipation even through limited heat dissipation holes in thin notebook designs
2Ease of manufacture
If the air gap between blades of existing centrifugal fans is kept large, then the manufacturing is simpler, but the air flow is not easy to control so that backflow readily occurs, resulting in insufficient wind pressure
Solution Approach 1:
The patent applies local quality by creating a reduction section in specific regions of the blade structure. The air gap between blades is narrowed locally at the reduction section rather than uniformly throughout, allowing improved airflow control and wind pressure generation while maintaining overall manufacturing simplicity
Solution Approach 2:
The reduction section introduces a curved or tapered geometric transition in the blade structure. This curved design smoothly guides airflow through the narrowed gap, preventing backflow while maintaining ease of manufacture through standard forming processes
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 design effectively increases wind pressure and improves heat dissipation efficiency by creating a pressurizing effect on airflow through the reduction sections, addressing the issues of thermal resistance and backflow.
Implementation Method 1
an end of the flow path away from the hub has a reduction section... a pressurizing effect is provided to the airflow flowing through the reduction section, thereby increasing the air pressure
Data Source
AI summary
A heat dissipation fan including a housing, a hub, and a plurality of blades is provided. The hub is rotatably disposed in the housing. The blades are disposed at a surrounding edge of the hub to be rotated with the hub. When the heat dissipation fan is operated, at least one flow path is formed by two adjacent blades, and the flow path has a reduction section away from the hub.