Ducted Air Temperature Sensor for Computer Cooling
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Solution Overview
Problem
Existing computer systems face challenges in accurately sensing the temperature of heat-generating components due to fluctuations and the need for customized thermal sensor placement, which can lead to inefficient cooling and increased noise and energy consumption from fans.
Innovation Solution
A system that includes a hot air duct with a high aspect ratio, housing a thermal sensor to measure air temperature downstream from the heat-generating component, allowing for independent temperature sensing within the computer chassis and reducing temperature fluctuations, while a controller adjusts fan speed based on these measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a thermocouple is mounted as close as possible to the heat-generating component for accurate temperature measurement, then temperature sensing accuracy is improved, but manufacturing complexity increases due to required motherboard customization
Solution Approach 1:
The patent introduces a duct as an intermediary element that transports heated air from the heat-generating component to a thermal sensor. This mediator allows temperature measurement without direct contact between the sensor and the component, eliminating the need for motherboard customization while maintaining measurement accuracy through the thermal characteristics of the duct material and geometry.
2Temperature
If fan speed is increased to provide sufficient cooling, then cooling effectiveness is improved, but noise and energy consumption increase
Solution Approach 1:
The patent implements a feedback control system where thermal sensors continuously monitor temperature and communicate with a controller that adjusts fan speed accordingly. This closed-loop feedback mechanism allows the system to operate fans at minimum necessary speeds while maintaining effective cooling, reducing both energy consumption and noise compared to constant high-speed operation.
3Manufacturing precision
If thermal sensors are positioned to accurately measure component temperature, then temperature control precision is improved, but device complexity increases due to customized sensor placement
Solution Approach 1:
The duct serves as a standardized intermediary structure that can be implemented on conventional motherboards without customization. The thermal sensor is positioned within the duct where it measures the temperature of air that has been heated by the component, providing accurate temperature control data without requiring complex or customized sensor placement procedures.
4Reliability
If fans are operated at high speeds to ensure adequate cooling, then cooling reliability is improved, but noise generation increases
Solution Approach 1:
The feedback control system monitors actual temperature conditions and adjusts fan speed to the minimum level required to maintain reliable cooling. This prevents unnecessary high-speed operation that would generate excessive noise, while still ensuring cooling reliability when temperature thresholds are approached.
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 solution provides stable and accurate temperature control for heat-generating components, reducing fluctuations and energy consumption by optimizing airflow and fan operation, while allowing for flexible installation of circuit boards with varying layouts.
Implementation Method 1
The most common approach to this problem is the use of forced air convection through computer chassis.
Implementation Method 2
A hot air duct passively directs air heated by the heat-generating component
Implementation Method 3
A first thermal sensor is secured within the hot air duct near the single hot air duct outlet for sensing the temperature of air flowing through the hot air duct
Data Source
AI summary
A temperature isolation duct in a computer system comprising a chassis securing a circuit board and a fan system that draws air through the chassis, and a heat-generating component is mounted on the circuit board and exposed to the air flow. The hot air duct passively directs air heated by the heat-generating component from a single hot air duct inlet in direct downstream alignment with the heat-generating component to a single hot air duct outlet. A thermal sensor is secured within, or in direct alignment with, the hot air duct near the duct outlet for sensing the temperature of air flowing through the hot air duct and generating a temperature signal. A controller is in electronic communication with the thermal sensor for receiving the temperature signal and in electronic communication with the fan system for sending a fan speed control signal.