Centrifugal Fan Air Guide Plates for Uniform Cooling
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Solution Overview
Problem
Conventional heat dissipation devices with centrifugal fans suffer from uneven airflow distribution at the air outlet, leading to inefficient cooling of central portions of the fin assembly and the formation of vortices, which reduces overall heat dissipation efficiency.
Innovation Solution
The heat dissipation device incorporates a centrifugal fan with a casing that includes a hub, radially extending blades, and obliquely angled air guide plates that guide airflow from high-pressure areas to low-pressure areas, ensuring even airflow distribution and minimizing resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional centrifugal fan is used, then the heat dissipation device can operate, but the airflow distribution at the air outlet is uneven, causing inefficient cooling of central portions and vortex formation
Solution Approach 1:
The air outlet is segmented into multiple regions (central region and side regions) using air guide plates. Each region is independently guided to receive appropriate airflow, transforming the uniform airflow problem into region-specific controlled flow distribution.
Solution Approach 2:
Air guide plates are introduced as intermediary components between the impeller and the fin assembly. These plates actively redirect and distribute airflow from high-pressure areas to low-pressure areas, mediating the airflow distribution to eliminate uneven cooling and vortex formation.
2Productivity
If air is driven by the impeller, then cooling function is provided, but vortexes are generated at the center of the air outlet due to uneven airflow distribution
Solution Approach 1:
The air guide plates utilize the pressure differential created by the impeller operation to redirect airflow constructively. The high-pressure airflow from the impeller is channeled through the air guide plates to fill low-pressure regions, converting what would be wasteful vortex formation into useful cooling airflow.
Solution Approach 2:
The air guide plates are designed with specific geometric parameters (angles, positions, dimensions) that optimize airflow distribution. By carefully controlling these parameters, the system transforms the airflow pattern to eliminate vortices while maintaining high cooling performance across all regions.
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
This design enhances heat dissipation efficiency by redistributing airflow to previously under-cooled areas, improving cooling performance and reducing vortex formation, thereby optimizing the cooling of the entire fin assembly.
Implementation Method 1
obliquely angled air guide plates that guide airflow from high-pressure areas to low-pressure areas
Implementation Method 2
The fin assembly 90 absorbs heat from the heat generating component
Implementation Method 3
dissipates the heat to the ambient environment
Implementation Method 4
The impeller 84 of the blower 80 rotates clockwise and drives air to the fin assembly 90
Data Source
AI summary
A centrifugal fan includes a casing and an impeller received in the casing. The casing defines an air outlet at one side thereof. An air channel is defined in the casing between a sidewall of the casing and outermost free ends of blades of the impeller. The air channel has an upstream end and a downstream end along a rotation direction of the impeller. A plurality of air guide plates is formed in the casing and disposed at a junction between the downstream end of the air channel and an area of the air outlet directly communicating with the downstream end of the air channel. The air guide plates are structured and arranged in a streamlined manner and pattern with respect to air flowing from the downstream end of the air channel towards the air outlet.