Multi-Stage Centrifugal Fan for Enhanced Heat Dissipation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional centrifugal fans have limited pressure increasing effect due to single-stage compression, which restricts their heat dissipation capability.
Innovation Solution
The centrifugal fan design incorporates multiple impeller structures and air-containing portions with vortex offsetting elements to enhance airflow pressure, allowing for multi-stage compression and improved air accumulation, thereby increasing the pressure and heat dissipation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If a conventional centrifugal fan with single-stage compression is used, then the device complexity is low, but the pressure increasing effect is limited
Solution Approach 1:
The impeller is divided into multiple blade sets (first blade set, second blade set, third blade set) arranged in different stages. Each blade set performs a stage of compression, allowing the air to be compressed multiple times as it passes through the impeller, thereby achieving multi-stage compression and significantly increasing the pressure effect without requiring a completely different device architecture
Solution Approach 2:
Multiple blade sets are nested within the same impeller structure, with each blade set positioned at different radial or axial locations. The air-containing portion is nested within the casing, creating a compact multi-stage compression system where each stage is contained within the overall structure, achieving high pressure increase without proportionally increasing external dimensions
2Productivity
If a centrifugal fan with single-stage compression is used, then the manufacturing cost is low, but the heat dissipation capability is insufficient
Solution Approach 1:
The impeller is segmented into multiple blade sets that can be manufactured separately and then assembled into the complete impeller structure. This segmentation allows for standardized manufacturing of individual blade sets using existing centrifugal fan manufacturing processes, while the assembled multi-stage configuration achieves superior heat dissipation capability through multi-stage compression
Solution Approach 2:
The multi-stage compression system serves multiple functions: it increases pressure significantly for better heat dissipation, maintains compatibility with existing centrifugal fan housings and mounting interfaces, and can be integrated into various electrical system cooling applications. The air-containing portion design universally applies to different impeller configurations while maintaining the multi-stage compression benefit
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 enhanced pressure increasing effect improves the heat dissipation ability of the centrifugal fan, enabling more effective cooling of electrical components.
Implementation Method 1
the impeller structure 13 and driving device 15 are installed inside the casing 11. The blade set 131 of the impeller structure 13 is located corresponding to the outlet 111. In this case, when the driving device 15 drives the impeller structure 13 to rotate, the blade set 131 presses the air to generate the airflow through the outlet 111.
Data Source
AI summary
This is related to a fan including a casing, a first impeller structure, a second impeller structure, and at least one driving device. The casing has an outlet and an air-containing portion having an entrance and an exit provided inside the casing. The first impeller structure and the second impeller structure are installed inside the casing, and include a first blade set and a second blade set, respectively. The first blade set is located corresponding to the entrance of the air-containing portion. The second blade set is located corresponding to the exit of the air-containing portion. The driving device drives the first and second impeller structures.