Dual-Impeller Blower with Segmented Intake Ports
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Solution Overview
Problem
Conventional fan motors with intake holes on both surfaces of the casing face issues such as reduced air volume and noise generation due to the narrowing of intake holes for bearing and rib support, necessitating larger motor sizes to achieve sufficient air volume.
Innovation Solution
A blower design featuring a base with an annular cover, a motor with a rotor and stator, and two independent impellers attached to the rotor and shaft, allowing for increased air volume and reduced noise through optimized intake port configuration and motor architecture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a base with bearing tube and rib is provided to one intake hole, then structural support is achieved, but the intake hole becomes narrow causing decreased air volume and noise generation
Solution Approach 1:
The patent divides the single intake hole into multiple intake holes (first intake hole and second intake hole) on different surfaces of the case. This segmentation allows the bearing tube and rib to be positioned relative to only one intake hole while maintaining adequate intake area through the multiple holes, thereby resolving the contradiction between structural support and air volume.
2Quantity of substance
If the intake hole is enlarged to obtain sufficient air volume, then air volume is improved, but the fan motor becomes large
Solution Approach 1:
By segmenting the intake area into multiple intake holes distributed on different surfaces of the case, the patent achieves sufficient total intake area without requiring any single hole to be large. This allows the motor to maintain a compact size while still obtaining adequate air volume for cooling and operation.
3Temperature
If a fan motor with intake holes on both surfaces is used, then cooling performance is improved, but the intake holes become narrow due to base components
Solution Approach 1:
The patent provides multiple intake holes on both the upper and lower surfaces of the case, creating a segmented intake system. This segmentation ensures that even when base components (bearing tube, rib) are present, each intake hole can maintain adequate dimensions while the combined intake area across multiple holes delivers sufficient air volume for effective cooling.
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 enhances air volume and reduces noise and vibration by maintaining a larger intake area while minimizing motor size, achieving balanced airflow and turbulence suppression.
Implementation Method 1
a motor with a rotor and stator, and two independent impellers attached to the rotor and shaft
Data Source
AI summary
A blower includes a base, a motor attached to the base, a first impeller to be rotated by the motor, and a second impeller to be rotated by the motor and independent of the first impeller. The base includes an annular cover that covers at least a portion of the motor, a support that extends from an upper end of the cover, and a bottom extending inward from a lower end of the cover and to which the stator is fixed. The bottom includes a shaft hole to accommodate a shaft. The first impeller and the second impeller are fixed to an upper portion and a lower portion of a rotor, respectively. At least one of the first impeller and the second impeller is fixed to the shaft.