Centrifugal Fan Arc Guide Ring Airflow Optimization
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Solution Overview
Problem
Centrifugal fans used in electric apparatuses for heat dissipation face inefficiencies in airflow and space utilization, which can lead to malfunction and potential damage from inadequate heat dissipation.
Innovation Solution
The centrifugal fan design incorporates a centrifugal impeller with a hub and blades, a first and second housing forming a hollow chamber and air outlet, an annular guide ring with progressive arc structures, and a driving device, enhancing airflow efficiency and space utilization through specific geometric configurations and guide structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a centrifugal fan is used to increase air quantity for cooling, then heat dissipation capability is improved, but airflow efficiency and space utilization need improvement
Solution Approach 1:
The patent employs curved blade surfaces and arc-shaped guide structures (first arc structure and second arc structure) that follow the airflow trajectory. The blades have optimized curvature profiles that guide air smoothly from the inlet through the impeller to the outlet, reducing turbulence and improving airflow efficiency while maintaining compact dimensions.
Solution Approach 2:
The patent optimizes geometric parameters including blade angle, blade curvature radius, guide ring arc thickness progression, and gap dimensions between components. The first arc structure has thickness decreasing progressively from the air inlet, and the second arc structure has thickness decreasing from the outermost margin of blades, creating optimal flow guidance without excessive material that would restrict airflow.
2Quantity of substance
If a centrifugal fan is used to increase air quantity for cooling, then heat dissipation capability is improved, but space utilization needs improvement
Solution Approach 1:
The annular guide ring is positioned within the hollow chamber formed by the first and second housings, with the centrifugal impeller nested within the guide ring structure. The support brackets extend from the housing to connect with the support plate, creating a compact nested arrangement that maximizes space utilization while maintaining effective airflow pathways.
Solution Approach 2:
The patent utilizes the radial dimension effectively by positioning the first arc structure on the inner surface around the air inlet and the second arc structure on the inner surface close to the outermost margin of the blades. The gap between these arc structures in the radial direction optimizes airflow while minimizing the overall radial footprint of the fan assembly.
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 design improves airflow efficiency and space utilization, allowing for more effective heat dissipation and potentially preventing damage to electric elements by optimizing airflow pathways and chamber usage.
Implementation Method 1
The centrifugal impeller has a hub and several blades, in which the blades are connected to and disposed around the hub in an angularly spaced-apart manner
Data Source
AI summary
A centrifugal fan includes a centrifugal impeller, a first housing, a second housing, an annular guide ring and a driving device. The centrifugal impeller has a hub and blades connected to and disposed around the hub. The first housing and the second housing cooperatively define a hollow chamber and an air outlet. An air inlet is formed in a central section of the second housing. A first arc structure is located on an inner surface around the air inlet of the second housing. Support brackets respectively extend from an end close to a tongue of the second housing and an end away from the tongue of the second housing. The support brackets are perpendicular to the second housing. The annular guide ring has a second arc structure close to an outermost margin of inner surfaces of the blades. The driving device is used for rotating the centrifugal impeller.