Multilayer Fan Blades for Wind Volume and Pressure Balance
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Solution Overview
Problem
Existing fans fail to achieve optimal heat dissipation by balancing wind volume and pressure, and cannot provide different wind volumes and pressures at various positions, leading to suboptimal performance.
Innovation Solution
A fan with multilayer fan blades featuring varying blade shapes, numbers, and angles in different layers, which adjusts wind speed and pressure across layers to create a spiral flow field with a funneling effect, enhancing heat dissipation efficiency and reducing noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a fan is designed with a large wind volume at a fixed rotation speed, then the wind volume is improved, but the wind pressure deteriorates
Solution Approach 1:
The fan blade is divided into multiple layers (first layer, second layer, third layer) with different blade shapes, numbers, and angles. Each layer independently contributes to wind generation with different characteristics, allowing the system to provide both large wind volume and sufficient wind pressure simultaneously, resolving the trade-off between these two parameters.
Solution Approach 2:
Different layers of the fan blade have locally optimized properties: the first layer has a large number of blades for high wind volume, the second layer has medium blades for balanced performance, and the third layer has fewer but larger blades for wind pressure. This local differentiation allows each layer to excel at specific functions while working together to overcome the wind volume-pressure trade-off.
2Ease of manufacture
If an ordinary fan is designed with uniform blade structure, then the manufacturing is simple, but the ability to provide different wind volumes and pressures at different positions deteriorates
Solution Approach 1:
The fan blade is segmented into multiple layers with distinct characteristics, enabling the system to provide different wind volumes and pressures at different positions. This segmentation achieves adaptability while maintaining reasonable manufacturing complexity through modular design of each layer.
Solution Approach 2:
Each layer of the fan blade has locally optimized blade shapes, numbers, and angles tailored to specific performance requirements. The first layer optimizes for wind volume, the second for balanced performance, and the third for wind pressure, achieving position-specific wind characteristics while using standardized manufacturing processes for each layer type.
3Reliability
If the fan blade structure is increased to multilayer design, then the heat dissipation effect is improved, but the device complexity increases
Solution Approach 1:
The fan blade is divided into three functional layers, each contributing to heat dissipation through different mechanisms. This segmentation improves overall heat dissipation effectiveness by addressing different flow regions, while the modular structure allows for systematic design and assembly that manages the inherent complexity.
Solution Approach 2:
The multilayer fan blade structure employs a nested arrangement where multiple blade layers are stacked concentrically around the rotation axis. This nesting approach maximizes the use of available space, creates a compact overall structure, and allows each layer to be manufactured and assembled independently, managing complexity through hierarchical organization.
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 multilayer fan blades improve heat dissipation by creating a spiral flow field that reduces long-distance wind attenuation, providing targeted wind volumes and pressures, and minimizing operating noise.
Implementation Method 1
the motor converts electric energy into electromagnetic energy and then converts the same into kinetic energy for rotation
Implementation Method 2
the rotation of the fan blades drives the airflow to achieve the heat dissipation function
Data Source
AI summary
Disclosed is a fan with multilayer fan blades, including a fan frame and a motor. Multilayer fan blades are arranged in the fan frame; the multilayer fan blades are connected to the motor, and the multilayer fan blades are arranged with at least two fan blade connection rings. According to the above solution, by utilizing the design of blade shapes and the number of different curved surfaces of the multilayer fan blades, an inner layer has a faster wind speed than an outer layer, and the fan is changed from a smooth wind suction flow field to a spiral flow field with a funneling effect, reducing the attenuation of long-distance wind flow and improving the heat dissipation efficiency at a far working point.