Fan Frame Curvature for Concentrated Airflow and Lower Noise
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Solution Overview
Problem
Conventional fans with high-speed motors for heat dissipation generate operational noise and disrupt airflow concentration, leading to decreased performance and increased noise levels.
Innovation Solution
A fan design featuring a fan frame with two turning portions and an obliquely disposed rotor shell, where the rotor shell's outer shape is gradually expanded, and blades are arranged to reduce airflow impact on internal components, stabilizing the flow field and enhancing air pressure and quantity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If two high-speed fans are connected in series to increase heat dissipation efficiency, then the heat dissipation efficiency is improved, but the operation noise increases and the airflow cannot be concentrated
Solution Approach 1:
The fan frame is divided into multiple sections with different curvatures, including a first turning portion and a second turning portion. This segmentation allows the airflow to be guided through different curvature zones, concentrating the airflow while reducing turbulence and noise, thereby achieving high heat dissipation efficiency with a single fan
Solution Approach 2:
The fan frame incorporates curved surfaces with varying radii - the first turning portion has a smaller curvature radius while the second turning portion has a larger curvature radius. This curved geometry design optimizes airflow concentration and reduces eddy currents, enabling effective heat dissipation with reduced noise operation
2Productivity
If two high-speed fans are connected in series to increase heat dissipation efficiency, then the heat dissipation efficiency is improved, but the airflow cannot be concentrated
Solution Approach 1:
The fan frame features a curved outer shape with at least one turning portion having a specific curvature radius. This curved geometry naturally guides and concentrates the airflow generated by the fan blades, maintaining focused airflow patterns that enhance heat dissipation efficiency without requiring multiple fans
Solution Approach 2:
Different portions of the fan frame have different curvature radii - the first turning portion has a smaller radius while the second has a larger radius. This local variation in geometric properties optimizes airflow concentration at different stages, ensuring effective airflow focus for high heat dissipation performance
3Shape
If the fan frame is designed with turning portions to concentrate airflow, then the airflow concentration is improved, but the device complexity increases
Solution Approach 1:
The fan frame utilizes smooth curved surfaces with defined turning portions rather than complex angular or multi-component structures. This curved geometry achieves effective airflow concentration while maintaining manufacturing simplicity and structural elegance, avoiding excessive device complexity
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 design reduces operational noise and improves fan performance by concentrating airflow and providing sufficient air pressure and quantity, while maintaining a steady flow field.
Implementation Method 1
The stator magnetic pole group magnetically drives the magnetic structure to rotate the shaft and the rotor shell
Data Source
AI summary
A fan includes a fan frame and a driving device. The fan frame includes a base, a frame shell and static blades arranged on the periphery of the base. The driving device includes a stator structure and a rotor structure. The stator structure includes a stator magnetic pole group and a bushing. The rotor structure includes a bearing, a shaft, a rotor shell, a magnetic structure and blades. The shaft is connected with the rotor shell and disposed through the bearing. The stator magnetic pole group magnetically drives the magnetic structure to rotate the rotor shell. The blades are arranged on the periphery of the rotor shell. Two ends of the frame shell are configured with two turning portions, respectively. The two turning portions are disposed between parts of the frame shell with different curvatures.