Fan Status Model for Reverse Rotation Cleaning
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Solution Overview
Problem
Dirt and dust accumulation on fan blades in electronic devices lead to reduced cooling efficiency, increased fan temperature, and noise issues.
Innovation Solution
An electronic device equipped with a fan status determination model that uses control signals and operating parameters to assess the fan's cleanliness, triggering a reverse rotation cleaning mechanism when the fan is deemed abnormal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the fan operates continuously to dissipate heat, then the cooling function is maintained, but dirt and dust accumulation reduces cooling efficiency and increases temperature
Solution Approach 1:
The system performs preliminary cleaning actions by reversing the fan rotation before dirt accumulation severely impacts cooling efficiency. The fan status determination model continuously monitors operating parameters and triggers reverse rotation cleaning cycles proactively to prevent dirt buildup that would reduce cooling function.
Solution Approach 2:
The fan status determination model continuously monitors fan operating parameters (speed, temperature, noise) and provides feedback to the embedded controller. When abnormal patterns indicating dirt accumulation are detected, the system automatically triggers reverse rotation cleaning cycles to restore cooling efficiency.
2Productivity
If the fan operates at high speed to improve cooling, then cooling efficiency increases, but noise increases and dirt accumulation accelerates
Solution Approach 1:
The system implements periodic reverse rotation cleaning cycles interspersed with normal forward rotation cooling operations. The fan alternates between forward rotation for cooling and reverse rotation for cleaning, creating a periodic action pattern that maintains cooling efficiency while periodically removing dirt accumulation that would generate noise.
3Reliability
If manual cleaning of the fan is performed, then dirt is removed, but user time and effort are required
Solution Approach 1:
The system performs self-cleaning by automatically detecting fan status through the fan status determination model and executing reverse rotation cleaning cycles without user intervention. The embedded controller autonomously manages the cleaning process, eliminating the need for manual user cleaning while maintaining fan reliability.
4Reliability
If the fan rotation direction is reversed for cleaning, then dirt is removed from blades, but the fan cannot perform normal cooling function during cleaning
Solution Approach 1:
The system implements periodic reverse rotation cleaning cycles interspersed with normal forward rotation cooling operations. The fan alternates between forward rotation for cooling and reverse rotation for cleaning, creating a periodic action pattern that maintains cooling efficiency while periodically removing dirt accumulation.
Data Source
AI summary
An electronic device includes a fan, an embedded controller, a fan status determination model and a processor. The Fan has an operating parameter. The embedded controller is configured to control the fan to operate with a control signal. The fan status determination model is configured to determine whether the fan is in a normal state or an abnormal state according to the control signal and operating parameter. The processor is configured to input the control signal and operating parameter into the fan status determination model. The embedded controller is further configured to control the fan to reversely rotate according to the abnormal state of the fan.