Mixed-Flow Fan Hub Venting for Motor Heat Dissipation
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Solution Overview
Problem
Conventional mixed flow fans face limitations in heat dissipation efficiency due to material constraints, leading to overheating and reduced performance, especially when high-power heat dissipation is required, which can result in damage to internal components and decreased fan lifetime.
Innovation Solution
The design incorporates a tapered hub with an air vent and air-guiding plates around the inner periphery, along with a motor structure featuring a stator and rotor with a magnetic conductive housing and opening for enhanced airflow, allowing for improved heat dissipation by guiding air flow and dissipating waste heat effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If high-power motor is used for heat dissipation, then heat dissipation capability is improved, but waste heat accumulation inside the fan increases
Solution Approach 1:
The patent extracts the magnetic element from the traditional motor structure and places it in the hub, separating the motor function from the hub structure. This allows independent optimization of both components for heat dissipation.
Solution Approach 2:
The patent introduces radial air vents in the hub, adding a radial dimension to airflow paths. This creates multiple-dimensional airflow channels (axial and radial) that enhance heat dissipation efficiency.
2Power
If silicon steel plates are used in motor, then motor performance is improved, but waste heat generation increases
Solution Approach 1:
The patent introduces air as an intermediary cooling medium that flows through radial vents in the hub and magnetic conductive housing, carrying away waste heat generated by silicon steel plates and motor components.
Solution Approach 2:
The patent uses pneumatic cooling by directing airflow through the hub and motor structure. The air flow mechanism removes heat from internal components without requiring liquid cooling systems.
3Ease of manufacture
If conventional motor structure is used, then manufacturing simplicity is maintained, but heat dissipation efficiency decreases
Solution Approach 1:
The patent merges the motor housing with the hub structure, combining two separate components into one integrated unit. This simplifies manufacturing while enabling direct airflow paths for heat dissipation.
Solution Approach 2:
The hub structure serves multiple functions: it supports the impeller, houses the motor, provides radial air vents for cooling, and acts as a structural connection between the impeller and motor shaft.
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 enhances heat dissipation efficiency within the fan, preventing overheating and extending the fan's operational life while maintaining performance, as demonstrated by reduced internal temperatures compared to conventional designs.
Implementation Method 1
A fan is generally used as the heat-dissipation device in the electronic device
Implementation Method 2
The magnetic element is disposed around an inner periphery of the magnetic conductive housing and located corresponding to the stator structure
Data Source
AI summary
A fan includes a frame, an impeller and a motor. The impeller includes a hub, a plurality of blades, first air-guiding plates and second air-guiding plates. The hub has a tapered shape. A width of the hub gradually increases along a direction from a top portion of the hub to a bottom portion of the hub. The hub has at least an air vent. The blades are disposed around an outer periphery of the hub. The first air-guiding plates and the second air-guiding plates are disposed around an inner periphery of the hub. The first air-guiding plates are arranged between two of the second air-guiding plates in staggered. The second air-guiding plates are arranged between two of the first air-guiding plates in staggered. The first air-guiding plates and the second air-guiding plates have different thicknesses, heights or shapes.