Heat Dissipation Fin Turbulent Structures for Noise Reduction
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Solution Overview
Problem
Current projection devices face challenges in achieving high brightness, low noise, and small volume designs due to increased heat generation, as higher fan speeds for heat dissipation lead to noise and larger fin sets compromise convenience and safety.
Innovation Solution
A heat dissipation module with stacked fins featuring turbulent structures that disrupt airflow, creating vortices to enhance convection efficiency without increasing fan speed or fin set volume, including a fan to provide airflow and heat pipes for efficient heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the rotation speed of the fan is increased to strengthen heat dissipation airflow, then heat dissipation efficiency is improved, but noise increases
Solution Approach 1:
The patent changes the geometric parameters of the heat dissipation fins by introducing turbulent structures with specific tilt angles (30-60 degrees) and dimensions. These parameter changes create turbulence that enhances heat transfer coefficient, allowing effective heat dissipation at lower fan speeds and reducing noise while maintaining productivity
Solution Approach 2:
The patent creates a porous-like structure on the heat dissipation fin surface through turbulent structures (protrusions and recesses). This increases the effective surface area and creates turbulence in the airflow, enhancing convective heat transfer without requiring increased fan speed, thus improving heat dissipation efficiency while controlling noise levels
2Productivity
If the volume of the heat dissipation fin set is increased to enhance heat dissipation efficiency, then heat dissipation efficiency is improved, but weight and volume of the projection device increase
Solution Approach 1:
Instead of increasing the volume of the heat dissipation fin set, the patent changes the surface parameters of the fins by adding turbulent structures with optimized dimensions (protrusion height h1: 0.5-2mm, recess depth h2: 0.5-2mm). These parameter modifications enhance heat transfer efficiency per unit volume, allowing smaller overall device volume while maintaining or improving heat dissipation performance
Solution Approach 2:
The patent adds a new dimension to the heat dissipation approach by introducing tilted turbulent structures that create three-dimensional airflow patterns. The tilt angle (30-60 degrees) creates vertical and diagonal airflow components in addition to the horizontal flow, enhancing heat transfer without increasing the horizontal volume of the fin set, thus reducing overall device volume while maintaining productivity
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 module effectively enhances heat dissipation without increasing fan speed or fin set volume, meeting the requirements of high brightness, low noise, and small volume designs by optimizing airflow through tilted turbulent structures and heat pipe placement.
Implementation Method 1
each of the heat dissipation fins has a front side, a rear side opposite to the front side and at least one turbulent structure set. The turbulent structure set is located between the front side and the rear side and has a plurality of first turbulent structures
Implementation Method 2
by using natural convection or a forced convection provided by a fan, the heat is transferred from the heat dissipation fin set to the outside of the projection device
Implementation Method 3
heat pipes for efficient heat transfer
Data Source
AI summary
A heat dissipation module includes a heat dissipation fin set. The heat dissipation fin set includes a plurality of heat dissipation fins, wherein these heat dissipation fins are stacked on each other, and each of the heat dissipation fins has a front side, a rear side opposite to the front side and at least one turbulent structure set. The turbulent structure set is located between the front side and the rear side and includes a plurality of first turbulent structures. The first turbulent structures are arranged from the front side to the rear side in sequence. A heat dissipation airflow flows from the front side toward the turbulent structure set along a flowing direction, and passes through the turbulent structure set to flow toward the rear side. An extending direction of each of the first turbulent structures is tilted relative to the flowing direction.