Subrack Fan Control via Segmented Air Channels
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Solution Overview
Problem
Current fan control methods in electronic systems are inefficient as they regulate all fans based on the highest temperature, leading to unnecessary high-speed operation, increased power consumption, noise, and reduced service life, as they do not account for varying power consumption and heat dissipation conditions across the system.
Innovation Solution
The method involves dividing fans into subsets corresponding to specific heat dissipation air channels, detecting temperature and rotating speed in real-time, and adjusting fan speeds dynamically to match temperature changes, ensuring each fan operates at optimal speed, reducing power consumption and noise while maintaining efficient heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If all fans are controlled based on the highest temperature in the system, then the heat dissipation requirement is met, but power consumption and noise are increased
Solution Approach 1:
The patent divides the fan set into multiple fan subsets, where each subset is independently controlled based on the temperature of its corresponding board. This segmentation allows fans to operate at different speeds rather than all running at maximum speed, thereby reducing overall power consumption while still meeting the heat dissipation requirements of each specific area.
Solution Approach 2:
The patent implements localized temperature-based control where each fan subset's speed is determined by the temperature of its corresponding board rather than the maximum temperature in the entire system. This local quality approach ensures that fans only operate at high speeds when their specific local area requires cooling, reducing unnecessary power consumption and noise from fans in cooler areas.
2Temperature
If all fans are controlled based on the highest temperature in the system, then the heat dissipation requirement is met, but noise is increased
Solution Approach 1:
By segmenting the fan control into multiple independently controlled subsets, the patent reduces the number of fans operating at high speed simultaneously. This segmentation directly reduces the overall noise level while maintaining adequate heat dissipation in each local area through its dedicated fan subset.
Solution Approach 2:
The local quality principle is applied by controlling each fan subset based on its corresponding board's temperature rather than the system's maximum temperature. This ensures that fans only generate noise when locally necessary, significantly reducing overall system noise while maintaining effective cooling where needed.
3Ease of operation
If unified speed regulation is adopted for multiple fans, then control simplicity is maintained, but accuracy of temperature control is reduced
Solution Approach 1:
The patent segments the fan control system into multiple independently controlled subsets, each managing its own temperature zone. This segmentation provides precise temperature control for each board while maintaining relative simplicity through standardized control logic applied to each subset, balancing accuracy and ease of operation.
Solution Approach 2:
By implementing local quality control where each fan subset responds to its corresponding board's temperature, the patent achieves accurate temperature control for each specific area. This localized approach maintains control simplicity through consistent control algorithms while significantly improving temperature control accuracy compared to unified regulation.
4Reliability
If multiple high-power fans are provided to meet heat dissipation requirements, then reliability is improved, but power consumption is increased
Solution Approach 1:
The patent implements dynamic speed regulation for fan subsets based on real-time temperature monitoring of corresponding boards. This dynamic control allows the system to maintain high reliability by ensuring adequate cooling capacity is available when needed, while reducing power consumption by lowering fan speeds when temperatures are lower, thus optimizing the balance between reliability and energy use.
Solution Approach 2:
The patent changes the operating parameters of fan subsets dynamically based on temperature conditions. By adjusting fan speeds according to actual temperature requirements, the system maintains the reliability needed for heat dissipation while minimizing power consumption through parameter optimization rather than operating all fans at constant high speed.
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
This approach effectively reduces power consumption and noise while ensuring accurate and efficient heat dissipation by optimizing fan speeds based on real-time temperature data, prolonging equipment life and improving system reliability.
Implementation Method 1
dividing the fan set into multiple fan subsets corresponding to the multiple heat dissipation air channels respectively so as to supply air to the corresponding board by each of the multiple fan subsets through the corresponding heat dissipation air channel
Data Source
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AI summary
Disclosed are a method and an apparatus for controlling subrack fans. The method comprises: by installing multiple boards installed with high-power components in different areas of a subrack respectively, forming multiple heat dissipation air channels corresponding to the multiple boards respectively; installing a fan group comprising multiple heat dissipation fans on the subrack; dividing the fan group into multiple fan areas corresponding to the multiple heat dissipation air channels respectively, so that each fan area blows air to a corresponding board through a corresponding heat dissipation air channel; detecting temperature of each board and a rotating speed of a corresponding fan area in real time; adjusting the rotating speed of the fan area according to a detection result, so that the rotating speed of the fan area increases or decreases as the temperature of the corresponding board increases or decreases. Also disclosed is the apparatus for controlling subrack fans. According to the present invention, power consumption and noise of fans can be reduced effectively while ensuring system heat dissipation and a rotating speed of each fan can be displayed correctly.