Fan Control Device Preventing Condensation via Humidity Feedback
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Solution Overview
Problem
Existing ICT equipment fan control systems risk condensation on internal components when intake air temperature suddenly increases, as they do not consider humidity levels in adjusting fan rotation.
Innovation Solution
A fan control device that includes an intake air temperature sensor, an intake air humidity sensor, and a controlling unit to adjust the cooling fan's rotation number based on the degree of temperature increase and humidity levels, preventing condensation by correcting the fan's rotation number when the temperature rise exceeds a threshold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the rotation number of the cooling fan is increased as intake air temperature rises, then the cooling effect is improved, but condensation occurs on internal surfaces
Solution Approach 1:
The system introduces feedback by detecting both temperature and humidity levels, then adjusting fan rotation based on the combined information. The control unit monitors humidity sensor output and modifies fan speed accordingly, creating a closed-loop control system that prevents condensation while maintaining cooling effectiveness.
Solution Approach 2:
The system changes the control parameter from temperature-only to a combination of temperature and humidity parameters. By considering both parameters together, the control algorithm can determine appropriate fan rotation speeds that prevent condensation formation while still achieving adequate cooling, thus resolving the technical contradiction.
2Device complexity
If the rotation number of the cooling fan is controlled based only on temperature, then the control system is simple, but it cannot prevent condensation when temperature sharply rises
Solution Approach 1:
The control unit is designed to perform multiple functions: it processes temperature data, processes humidity data, determines temperature increase degree, and controls fan rotation. This multi-functional approach allows the system to prevent condensation without requiring separate dedicated control mechanisms, thus minimizing additional complexity while improving reliability.
Solution Approach 2:
The system performs preliminary detection of humidity levels before condensation actually occurs. By monitoring humidity in advance and proactively adjusting fan rotation when temperature increases are detected, the system prevents condensation formation rather than reacting after condensation has already formed, thereby improving reliability without complex intervention mechanisms.
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
Prevents condensation and potential equipment breakdowns by dynamically adjusting the cooling fan's rotation in response to rapid temperature changes and humidity levels, ensuring effective temperature regulation.
Implementation Method 1
a cooling fan; an intake air temperature sensor that detects intake air temperature
Implementation Method 2
an intake air temperature sensor that detects intake air temperature
Implementation Method 3
an intake air humidity sensor that detects intake air humidity
Implementation Method 4
a cooling fan; a rotation number deciding unit that decides a rotation number of the cooling fan based on a result of detection by an intake air temperature sensor
Data Source
AI summary
A rotation number deciding unit decides a rotation number of a cooling fan based on the result of detection by an intake air temperature sensor. A determining unit determines whether the degree of increase of intake air temperature is equal to or more than a threshold based on the result of detection by the intake air temperature sensor. When the determining unit determines the degree of increase of intake air temperature is equal to or more than the threshold, the controlling unit determines whether there is a possibility of occurrence of condensation based on the result of detection by the intake air temperature sensor and the result of detection by an intake air humidity sensor. When determining there is a possibility of occurrence of condensation, the controlling means causes the cooling fan to rotate at a rotation number lower than the rotation number decided by the rotation number deciding unit.