Vibration Fan with Movable Magnetic Component for Heat Dissipation
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Solution Overview
Problem
Portable devices face challenges with heat dissipation due to noise from centrifugal fans and power consumption issues with piezoelectric fans, which hinder miniaturization and battery life.
Innovation Solution
A vibration fan utilizing an electromagnetic actuator with a movable and fixed magnetic component to drive a blade for oscillation, generating airflow for heat dissipation without the need for high voltage or bulky components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a centrifugal fan is used for heat dissipation, then effective air flow generation is achieved, but noise increases and device size cannot be minimized
Solution Approach 1:
The patent employs a vibration fan that generates airflow through mechanical vibration of the blade instead of rotation. The blade oscillates back and forth within a small amplitude, creating push-pull airflow that achieves heat dissipation without the noise associated with rotating centrifugal fans. This vibration-based mechanism eliminates the need for bearings and rotating components, thereby reducing noise while maintaining heat dissipation effectiveness.
2Productivity
If a centrifugal fan is used for heat dissipation, then effective air flow is generated, but device miniaturization is impeded due to bearing and rotating blade requirements
Solution Approach 1:
The vibration fan replaces the rotating blade and bearing assembly with a vibrating blade mechanism. The blade is driven by an electromagnetic actuator that causes it to oscillate within a confined space, eliminating the need for large bearing structures and rotating assemblies. This enables significant miniaturization of the fan while maintaining effective airflow generation for heat dissipation.
3Volume of moving object
If the bearing height is reduced to minimize centrifugal fan size, then device miniaturization is achieved, but bearing strength decreases and fan life is reduced
Solution Approach 1:
The patent extracts and eliminates the bearing component entirely from the fan system. By using a vibration-based blade mechanism instead of a rotating blade supported by bearings, the design removes the bearing and its associated reliability issues. The blade is suspended and driven by electromagnetic actuation, eliminating wear and structural weakness problems associated with miniaturized bearings.
4Volume of moving object
If a piezoelectric fan is used for heat dissipation, then device miniaturization is achieved, but power consumption increases and battery life decreases
Solution Approach 1:
The patent replaces the piezoelectric actuation mechanism with an electromagnetic actuator. The electromagnetic actuator drives the blade vibration through magnetic field interaction, which consumes less power than the high-voltage piezoelectric material required for comparable vibration. This substitution maintains the miniaturized form factor while significantly reducing power consumption and extending battery life in portable devices.
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 vibration fan effectively dissipates heat with reduced noise and power consumption, enabling miniaturization of portable devices while maintaining fan longevity.
Implementation Method 1
The movable magnetic component is driven by a magnetic force between the movable magnetic component and the fixed magnetic component to reciprocate relative to the fixed magnetic component
Data Source
AI summary
A vibration fan includes a base, an electromagnetic actuator and a blade. The electromagnetic actuator is disposed on the base, and includes a movable magnetic component and a fixed magnetic component. The movable magnetic component reciprocates relative to the fixed magnetic component. The blade is connected to the movable magnetic component.