Adjustable Centrifugal Fan Module for Thin Device Thermal Management
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Solution Overview
Problem
Existing heat dissipation modules in thin electronic devices face challenges in achieving efficient heat dissipation while maintaining thinness, often resulting in noise due to resonance and having complex structures with high power consumption and costs due to multiple motors and fan blades.
Innovation Solution
A heat dissipation module with adjustable thickness, featuring a centrifugal fan design where the first and second fan blades are either aligned or separated by a movable hub system, driven by a single motor, to optimize air volume and pressure while minimizing noise and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If two sets of motors and two sets of fan blades are combined to achieve adjustable thickness and improved heat dissipation efficiency, then heat dissipation performance is improved, but device complexity and power consumption increase
Solution Approach 1:
The patent merges two fan blades into a single integrated structure where the first fan blade and second fan blade are combined into one piece. This single fan blade serves dual purposes: when positioned in the first position, it works with the first motor for high-speed rotation and thin profile; when positioned in the second position, it works with the second motor for low-speed rotation and extended thickness for enhanced heat dissipation. This merging eliminates the need for separate motor-blade assemblies while maintaining adjustable thickness functionality.
Solution Approach 2:
The single fan blade is designed with multi-functionality to operate in two distinct modes. It can function as a thin-profile blade for low-power modes when positioned closer to the heat dissipation module, and as an extended blade for high-performance heat dissipation modes when positioned farther away. The blade's ability to assume multiple functional states replaces the need for multiple dedicated blade sets, reducing overall system complexity.
2Productivity
If two sets of motors and two sets of fan blades are combined to achieve adjustable thickness, then heat dissipation efficiency is improved, but power consumption increases
Solution Approach 1:
The patent combines two independent motor-blade systems into a single integrated system where one fan blade is controlled by two motors. This merging allows the system to use only the necessary motor-blade combination for each operating mode, avoiding the continuous power consumption of two independently running motor-blade assemblies. The single fan blade can be optimally positioned to match the required performance level, reducing unnecessary energy expenditure.
3Productivity
If fan blades are separated to achieve large air volume and great wind pressure, then heat dissipation efficiency is improved, but noise increases due to resonance
Solution Approach 1:
The patent implements a dynamic positioning system where the single fan blade can be adjusted between two positions based on operational requirements. In the first position, the blade is configured for high-speed operation with the first motor, maintaining a profile that minimizes resonance and noise. In the second position, the blade is extended for low-speed operation with the second motor, optimizing air volume and wind pressure for maximum heat dissipation efficiency. This dynamic adaptability allows the system to optimize performance while minimizing noise in each operating mode.
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 module effectively prevents resonance and noise, achieves high heat dissipation efficiency, and reduces power consumption by allowing thickness adjustment based on power mode, ensuring both thinness and performance.
Implementation Method 1
a driving motor disposed in the first casing, a first rotor connected to the first driving motor
Implementation Method 2
a heat dissipation module that has an adjustable form... a centrifugal fan design where the first and second fan blades
Data Source
Figure 1A~1B
Figure 1C~1D
Figure 2A~2B
AI summary
A heat dissipation module including a first fan and a second fan is provided. The first fan has a first hub and a plurality of first fan blades disposed on the first hub. The second fan has a second hub and a plurality of second fan blades disposed on the second hub. Herein the first hub and the second hub are movably connected to each other in an axial direction such that the first fan and the second fan coincide or are separated from each other.