Trend-Based Cooling Control for IHS Fan Oscillation
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Solution Overview
Problem
Conventional cooling systems in information handling systems (IHS) rely on temperature thresholds, leading to unnecessary operation and increased power consumption, component degradation, and noise due to oscillations in fan speed caused by frequent changes in cooling demand based on threshold crossings.
Innovation Solution
Implementing a temperature control system that uses a temperature status reporting engine to determine temperature trends within IHS, sending signals to the controller to adjust cooling accordingly, such as increasing or maintaining cooling based on whether the temperature is increasing or decreasing, rather than solely responding to threshold crossings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional temperature threshold control is used, then the cooling system responds to temperature changes, but fan speed oscillations occur causing excessive cooling and increased power consumption
Solution Approach 1:
The patent implements a feedback mechanism that continuously monitors temperature trends over time and adjusts fan speed accordingly. The controller receives temperature data from sensors, analyzes the trend (increasing, decreasing, or stable), and dynamically adjusts fan operation to match actual cooling needs, preventing both over-cooling and under-cooling scenarios that occur with fixed threshold systems
Solution Approach 2:
The system transitions from static threshold-based control to dynamic trend-based control. Instead of reacting only when temperature crosses fixed thresholds, the system continuously adapts fan speed based on the direction and rate of temperature change, allowing smooth transitions that eliminate oscillations and reduce energy consumption while maintaining reliable cooling
2Reliability
If conventional temperature threshold control is used, then the cooling system activates based on temperature status, but unnecessary cooling operations occur increasing component degradation
Solution Approach 1:
The feedback loop monitors actual temperature trends and provides continuous adjustment signals to the cooling system. This ensures cooling operations are precisely matched to thermal conditions, preventing unnecessary fan activations that would accelerate component degradation while maintaining adequate cooling for reliability
Solution Approach 2:
The system changes the control parameter from binary threshold status to continuous temperature trend analysis. By monitoring whether temperature is increasing, decreasing, or stable, the system adjusts cooling intensity proportionally, reducing excessive cooling operations that contribute to component wear while maintaining protective cooling levels
3Ease of operation
If conventional temperature threshold control is used, then the cooling system operates based on fixed thresholds, but noise increases due to frequent fan speed changes
Solution Approach 1:
The system implements dynamic fan speed adjustment based on temperature trends rather than fixed thresholds. This creates smooth, progressive fan speed changes that respond to actual thermal conditions, eliminating the frequent on/off cycling and abrupt speed changes that generate noise, while maintaining simple automated operation
Data Source
AI summary
An information handling system (IHS) temperature control system includes a cooling system, a controller coupled to the cooling system, and an IHS coupled to the controller. The IHS includes a temperature status reporting engine that is configured to determine a first temperature of the IHS and determine a second temperature of the IHS subsequent to determining the first temperature. In response to the second temperature being above a first predetermined temperature range, the temperature status reporting engine provides a first signal to the controller to increase cooling provided by the cooling system if the first temperature and the second temperature indicate that a temperature trend of the IHS is not decreasing, and provides a second signal to the controller to maintain cooling provided by the cooling system if the first temperature and the second temperature indicate that the temperature trend of the IHS is decreasing.