Heat Dissipating Fan With Automatic Reverse Rotation For Dust Removal
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Solution Overview
Problem
Conventional heat dissipating fans suffer from dust accumulation, which reduces air output and requires regular manual cleaning, adversely affecting their heat dissipating efficiency.
Innovation Solution
A heat dissipating fan design that includes a housing with an air inlet, air outlet, and a dust channel, where an impeller is rotatably coupled to a stator and controlled by a driving circuit and rotating direction control circuit to automatically reverse direction for dust removal, ensuring continuous operation without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the fan operates continuously to dissipate heat, then heat dissipation efficiency is improved, but dust accumulates in the housing and on the impeller blades, reducing air output and requiring manual cleaning
Solution Approach 1:
The patent applies reverse rotation of the impeller to remove dust. The control circuit periodically reverses the rotation direction of the impeller, causing dust accumulated on the blades and in the housing to be dislodged and expelled through the air outlet, thereby maintaining air output without manual cleaning
Solution Approach 2:
The patent implements periodic dust removal by controlling the impeller to rotate in reverse direction at predetermined intervals during normal operation. This periodic reverse rotation creates strong airflow that clears dust accumulation, allowing the fan to maintain high reliability over extended periods without manual intervention
2Temperature
If the spacing between fins is reduced to improve heat dissipation surface area, then heat dissipation efficiency is improved, but dust accumulates more easily between the fins, significantly reducing air output
Solution Approach 1:
The patent uses reverse rotation of the impeller to create strong reverse airflow that actively removes dust accumulated between the closely-spaced fins. This periodic cleaning action prevents dust buildup from blocking the narrow passages between fins, maintaining both heat dissipation efficiency and air output
3Productivity
If manual cleaning is performed regularly to remove dust, then air output is maintained, but the device requires human intervention and operational downtime
Solution Approach 1:
The patent implements self-service dust removal through automatic control of impeller reverse rotation. The control circuit automatically initiates periodic reverse rotation cycles to clear dust accumulation, eliminating the need for manual cleaning and human intervention while maintaining air output performance
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 fan effectively removes dust accumulation, maintaining air input and output efficiency and enhancing heat dissipation, thereby prolonging the service life of electronic products.
Implementation Method 1
An impeller is rotatably mounted in the housing and driven by a driving unit also mounted in the housing to draw in ambient air via the air inlet
Implementation Method 2
dust carried by the air currents is liable to accumulate inside the housing at the air inlet, the air outlet, the blades of the impeller, etc.
Data Source
AI summary
A heat dissipating fan includes a housing having a base and a sidewall coupled to the base. The sidewall defines a compartment. The housing further includes an air inlet, an air outlet, and a dust channel. The air inlet, the air outlet, and the dust channel are in communication with the compartment. A stator is coupled to the base of the housing. An impeller is rotatably coupled to the stator. A control element includes a driving circuit electrically connected to the stator and a rotating direction control circuit electrically connected to the driving circuit. In another embodiment, the heat dissipating fan includes a housing having a base and a lateral wall coupled to the base. The lateral wall defines a compartment. The lateral wall includes an air inlet and an air outlet both in communication with the compartment. The air inlet also acts as a dust channel.