Impeller With Segmented Blades For Cooling Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional fans experience reduced air pressure and increased noise at high speeds due to low blade density at the outer ring, leading to inefficient heat dissipation in electronic devices.
Innovation Solution
The impeller design incorporates a plurality of main blades and auxiliary blades with guiding portions, arranged to increase blade density at the outer ring, enhance airflow introduction, and include an inner ring for structural strength, thereby improving air volume and pressure while reducing noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the rotation speed of the fan is increased to improve cooling efficiency, then the air pressure and air volume increase, but the overall noise increases
Solution Approach 1:
The patent applies local quality by differentiating blade lengths: main blades extend from the hub to the outer ring, while auxiliary blades extend only from the outer ring to a middle position. This local differentiation optimizes airflow control at different radial positions, improving cooling efficiency while reducing turbulence-induced noise at the outer ring where auxiliary blades are shorter.
2Productivity
If the fan operates at high speed to increase air volume, then cooling performance improves, but air pressure drops and turbulent flow is generated
Solution Approach 1:
The patent segments the blade system into two distinct types: main blades that span the full radial distance from hub to outer ring, and auxiliary blades that span only from the outer ring to a middle position. This segmentation allows each blade type to perform specialized functions - main blades generate primary airflow and pressure, while auxiliary blades enhance air volume and guide flow, thereby maintaining air pressure while increasing air volume at high speeds.
3Ease of manufacture
If the blade density at the outer ring is low to simplify structure, then manufacturing is easier, but air pressure drops and noise increases
Solution Approach 1:
The patent segments the blade arrangement into main blades connected to the hub and auxiliary blades connected only to the outer ring. This segmentation enables increased blade density at the outer ring region without requiring all blades to be fully supported from the hub, thus improving air pressure generation while maintaining manufacturing feasibility through the simplified auxiliary blade attachment.
4Device complexity
If the blade density at the outer ring is low to reduce complexity, then the structure is simpler, but turbulent flow is generated and noise increases
Solution Approach 1:
The patent applies local quality by concentrating auxiliary blades at the outer ring region with shorter lengths, creating higher local blade density where it is most effective for airflow control. This local enhancement reduces turbulent flow and noise without requiring complex blade arrangements across the entire impeller structure, maintaining overall structural simplicity while addressing noise issues at the critical outer ring region.
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 blade density and structural features of the impeller increase air volume and pressure, reduce overall noise, and enhance the stability and vibration reduction of the fan during operation.
Implementation Method 1
a guiding portion is arranged on each of the plurality of auxiliary blades, so as to introduce the airflow into the fan quickly, and also to increase the air volume and air pressure of the fan
Implementation Method 2
the impeller comprises a hub, an outer ring, a plurality of first blades and a plurality of second blades... Each of the plurality of first blades passes through the outer ring, extends inward from the outer ring, and is connected to the hub
Data Source
AI summary
An impeller includes a hub, an outer ring, a plurality of first blades and a plurality of second blades. The plurality of first blades are arranged around the hub at intervals. Each of the plurality of first blades passes through the outer ring, extends inward from the outer ring, and is connected to the hub. The plurality of second blades are arranged around the hub at intervals. Each of the plurality of second blades passes through the outer ring. At least one of the plurality of second blades is disposed between the plurality of first blades. Each of the second blades includes a guiding portion, which is an inclined plane disposed on an inner end, and extends obliquely downward toward the hub. A length of each of the plurality of second blades is between 10% and 45% of a length of each of the plurality of first blades.