Impeller Blade Segmentation for Airflow Efficiency
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Solution Overview
Problem
Conventional fans with metal blades and circular rings suffer from airflow reflux and inefficiency due to interference from the circular ring, leading to wasted power and reduced airflow efficiency.
Innovation Solution
The fan design incorporates a hub with multiple sets of blades, where shorter second blades are placed between adjacent first blades and connected to a reinforcing element, enhancing structural strength and airflow output to prevent reflux.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a circular ring is added to strengthen the impeller structure, then the structural strength is improved, but the airflow efficiency deteriorates due to interference and reflux
Solution Approach 1:
The patent divides the blade structure into two distinct sets: first blades extending from the hub, and second blades positioned between the first blades. This segmentation allows the reinforcing function to be distributed through multiple blade elements rather than relying on a circular ring, thereby maintaining structural strength while eliminating the interference caused by the ring structure.
Solution Approach 2:
The patent removes the circular ring structure from the impeller design. By extracting this interfering element, the airflow path is cleared of obstructions that caused reflux, while the reinforcing function is replaced by the strategically positioned second blades that provide structural support without disrupting airflow.
2Productivity
If the blade size is enlarged to increase airflow quantity, then the airflow quantity is improved, but the blade strength deteriorates
Solution Approach 1:
The blade system is segmented into first blades for primary airflow generation and second blades for structural reinforcement. This allows the first blades to be optimized for large size and airflow quantity while the second blades provide the necessary structural support, resolving the contradiction between size and strength.
Solution Approach 2:
The impeller employs a composite blade structure combining first blades and second blades made of the same material but configured differently. The first blades are designed for airflow generation while the second blades provide reinforcing function, creating a composite structure that achieves both large size and high strength.
3Productivity
If the blade thickness is reduced to increase airflow quantity, then the airflow quantity is improved, but the blade strength deteriorates
Solution Approach 1:
The blade system is divided into first blades with reduced thickness for optimized airflow and second blades that can be thicker to provide structural reinforcement. This segmentation allows each blade type to be optimized for its specific function, resolving the contradiction between thinness for airflow and thickness for strength.
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 configuration effectively forces and outputs airflow, enhancing airflow efficiency by eliminating reflux and improving the fan's performance.
Implementation Method 1
The motor is disposed in the hub of the impeller and drives the impeller to rotate
Implementation Method 2
The first blades are disposed around the hub. At least one second blade is disposed between any two adjacent first blades
Data Source
AI summary
An impeller includes a hub, a plurality of first blades, and a plurality of second blades. The first blades are disposed around the hub. The second blades are disposed between the first blades. The lengths of the second blades are shorter than those of the first blades. The impeller can avoid the airflow reflux and have good airflow efficiency.