Fan Blade Rough Coating for Heat Dissipation
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Solution Overview
Problem
Electronic devices such as mobile phones and head-mounted display devices experience poor heat dissipation efficiency, leading to high temperatures during operation.
Innovation Solution
A fan blade with a rough coating layer featuring recessed regions on its surface, where the maximum depth of these regions ranges from 50 μm to 130 μm, enhancing airflow and reducing drag force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a smooth surface is used on the fan blade, then the manufacturing process is simple, but the heat dissipation efficiency is poor and airflow performance is insufficient
Solution Approach 1:
The patent applies a rough coating layer with recessed regions (micro-porous structure) on the fan blade surface. This porous-like structure increases surface area and creates turbulence in the boundary layer, improving heat dissipation efficiency and airflow performance without requiring complete redesign of the fan blade geometry
Solution Approach 2:
The patent modifies the surface parameters of the fan blade by adding a rough coating layer with specific recess depth (50-130 μm) and roughness (Ra 1.9-5.9 μm). These parameter changes enhance airflow rate and wind pressure while maintaining the overall fan blade structure and manufacturing process simplicity
2Productivity
If a rough coating layer with deep recesses is added to improve airflow, then heat dissipation efficiency increases, but manufacturing complexity increases
Solution Approach 1:
The rough coating layer with controlled recesses (50-130 μm depth) creates a porous-like surface structure that enhances airflow rate and heat dissipation. The coating can be applied using conventional powder coating or spray coating methods, avoiding complex manufacturing processes
Solution Approach 2:
The patent specifies optimal parameter ranges for the rough coating layer (recess depth 50-130 μm, Ra 1.9-5.9 μm) to achieve maximum airflow improvement while maintaining manufacturing feasibility. These parameter optimizations ensure the coating can be produced using standard industrial coating equipment and 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 rough coating layer increases airflow rate and wind pressure while reducing noise, thereby improving heat dissipation efficiency and noise reduction.
Implementation Method 1
The rough coating layer allows the air flowing through the surface S10 of the fan blade 100 to form a turbulent boundary layer
Implementation Method 2
the airflow outside the turbulent boundary layer travels backward slightly further along the surface S10 of the fan blade 100 to reduce the range of the wake flow that causes a drag force
Data Source
AI summary
A fan blade and a fabricating method thereof are provided. The fan blade includes a rough coating layer on a surface thereof. The rough coating layer includes a plurality of recessed regions. A maximum depth of recess of the recessed regions is between 50 μm to 130 μm.