Cooling Connector Detection Using Tachometer Signals
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Solution Overview
Problem
Current information handling systems face issues with improper installation of cooling systems due to the use of separate connectors for liquid and air cooling, leading to potential system damage and inefficiency.
Innovation Solution
A single connector is used to support both cooling systems, with a thermal management controller automatically detecting the type of cooling system installed by analyzing tachometer signals, eliminating the need for distinct pin-outs and preventing mix-ups.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate connectors are used for liquid cooling and air cooling, then the cooling systems can be controlled independently, but the complexity of the system increases and the risk of improper installation increases
Solution Approach 1:
The patent combines separate connectors for liquid cooling and air cooling into a single universal connector. This merging eliminates the need for users to distinguish between different connector types, thereby reducing installation errors while maintaining independent control capabilities for each cooling system through software-based identification and control.
Solution Approach 2:
The patent creates a universal connector that can accommodate both liquid cooling and air cooling systems. The connector is designed with multi-functionality to support different cooling types through a single interface, using pin assignments and tachometer signal analysis to identify and control the appropriate cooling system, thus reducing system complexity while maintaining reliability.
2Ease of manufacture
If separate connectors with distinct pin-outs are used for liquid and air cooling, then the cooling control can be precise, but the manufacturing cost and hardware requirements increase
Solution Approach 1:
The patent introduces tachometer signals as an intermediary mechanism to identify the cooling system type. Instead of relying on complex physical differentiation between connectors, the system uses the tachometer signal characteristics (signal presence, frequency, or pattern) to automatically identify whether liquid or air cooling is connected, thereby reducing hardware complexity while maintaining accurate identification.
Solution Approach 2:
The patent utilizes changes in tachometer signal parameters (such as signal presence, frequency, or voltage levels) to distinguish between liquid and air cooling systems. By monitoring these parameter variations, the system can accurately identify the cooling type without requiring complex hardware differentiation, thus reducing manufacturing costs while maintaining identification precision.
3Device complexity
If a single connector is used for both cooling systems, then the hardware cost is reduced, but the difficulty of detecting and measuring the cooling type increases
Solution Approach 1:
The patent implements a feedback mechanism where the system sends test signals through the connector and analyzes the returned tachometer signals to identify the cooling system type. The thermal management controller monitors the tachometer pin for characteristic signals that indicate whether a liquid cooling pump or air cooling fan is connected, automatically adapting control parameters based on the detected cooling type, thus simplifying hardware while maintaining detection accuracy.
Data Source
AI summary
An information handling system uses one connector for both liquid and air cooling and detects the type of cooling system installed. That provides the ability to choose the correct thermal handling table based on the installed cooling system. To detect the type of cooling system installed, a thermal management controller sets a control signal supplied to the cooling system through the connector to a first control value and determines if a tachometer signal supplied by the cooling system to the thermal management controller through the connector indicates a first type of cooling system. If the first type of cooling system is not detected, the thermal management controller checks if the tachometer signal from the cooling system with the control signal set at the first control value, or alternatively at a second control value, indicates a second type of cooling system. If no cooling system is detected, an error condition exists.