Centrifugal Fan Wing Tab Airflow Guide Structure
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Solution Overview
Problem
Existing centrifugal heat dissipation fans face challenges with insufficient air intake and wind pressure due to large air gaps between blades, leading to inefficient heat dissipation and potential air leakage, especially in thinner and lighter notebook computers.
Innovation Solution
The centrifugal heat dissipation fan incorporates a wing tab on each blade with an inclined surface adjacent to the flow inlet, guiding external airflow into the housing and preventing leakage by forming a guide structure that maintains airflow pressure until it exits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the flow inlet is increased to increase air intake, then the quantity of input air is improved, but air leakage occurs and wind pressure becomes insufficient
Solution Approach 1:
The wing tab is added locally at the leading edge of the blade, creating a localized structural modification that addresses airflow control at the critical inlet region without requiring changes to the entire blade or housing structure
Solution Approach 2:
The wing tab acts as an intermediary structure between the flow inlet and the blade, forming a guide structure that mediates airflow entry and prevents leakage by creating a controlled transition zone
2Ease of manufacture
If the air gap between blades is increased for easier manufacturing, then the device complexity is reduced, but wind pressure becomes insufficient and heat dissipation efficiency decreases
Solution Approach 1:
The wing tab is positioned specifically at the leading edge region of the blade where it interacts with the flow inlet, creating a localized airflow control feature that enhances wind pressure generation without requiring modifications to the entire blade structure
Solution Approach 2:
The wing tab extends in the radial direction from the blade surface, adding a dimensional feature that creates a three-dimensional guide structure for airflow, enhancing airflow control and pressure generation
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 air intake and wind pressure, improving heat dissipation efficiency while preventing air leakage, thus increasing the operational efficiency of the fan.
Implementation Method 1
the inclined surface of the wing tab can also cooperate with the flow inlet to form a guide structure that guides the airflow outside the housing into the housing
Implementation Method 2
these wing tabs will provide a shielding effect for the inside of the housing, that is, the airflow that has been sucked into the housing can be continuously kept in the housing to be pressurized
Implementation Method 3
The impeller is rotatably assembled in the housing along an axial direction. The impeller has a hub and multiple blades arranged around the hub
Data Source
AI summary
A centrifugal heat dissipation fan including a housing and an impeller is provided. The housing has at least one flow inlet. The impeller assembled in the housing and rotating about an axial direction includes a hub and a plurality blades disposed around the hub. The flow inlet is located in the axial direction and faces the hub. Each of the blades has a wing tab next to the flow inlet, and the wing tab extends from a main surface of the blade to another blade. The wing tab has an inclined surface facing toward a periphery of the flow inlet along a radial direction of the impeller.