Mapped Fan Zone Cooling System for IHS Thermal Management
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Solution Overview
Problem
Conventional mapped fan zone cooling systems in information handling systems face inefficiencies due to limited local airflow potential, high power consumption, and airflow balance issues, which can lead to inadequate cooling of components and increased power usage when all fans are operated at full speed.
Innovation Solution
A cooling system with a chassis containing thermal sensors and multiple fan zones, where a controller maps fan operations based on thermal requirements, allowing for optimized fan speed adjustments across zones to minimize power consumption while ensuring adequate cooling, by activating fans in a first zone and secondary zones according to specific mappings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a single fan is mapped to cool a specific IHS component, then power consumption is reduced compared to operating all fans, but local airflow potential is limited and cooling effectiveness is insufficient
Solution Approach 1:
The patent combines multiple fan zones into a coordinated cooling system. When a component requires cooling, the controller activates not only the directly mapped fan zone but also additional fan zones that can contribute to the cooling effect, creating a merged cooling approach that maintains reliability while managing power consumption
2Reliability
If the mapped fan operates at full speed to meet thermal requirements, then cooling effectiveness is improved, but power consumption increases cubically with fan speed
Solution Approach 1:
The patent applies partial action by activating multiple fan zones at optimized speeds rather than running a single fan at full speed. The controller calculates optimal fan speeds for multiple zones that collectively meet the thermal requirement while consuming less power than a single high-speed fan, exploiting the fact that multiple fans operating at moderate speeds is more efficient than one fan operating at maximum speed
3Reliability
If multiple fans are operated at full speed to achieve maximum total airflow, then overall cooling capacity is improved, but local maximum airflow is not achieved and power consumption increases
Solution Approach 1:
The patent applies local quality by selectively activating only the fan zones that are relevant to the specific thermal requirement. The controller identifies which fan zones can contribute to cooling the hot spot and activates only those zones at optimized speeds, rather than operating all fans at full speed. This creates a localized, targeted cooling approach that achieves local maximum airflow efficiency while minimizing total power consumption
4Use of energy by moving object
If fan zones are mapped to specific components, then power consumption is reduced through selective operation, but airflow balance in chassis regions becomes disrupted causing negative, positive, or stagnant airflow
Solution Approach 1:
The patent implements feedback by having the controller continuously monitor thermal conditions and dynamically adjust fan zone operations. The controller receives thermal sensor data, determines the appropriate fan zones to activate, operates them at optimized speeds, and continuously adapts based on thermal feedback. This closed-loop control maintains airflow balance while achieving power savings, as the system responds to actual thermal conditions rather than operating fan zones in isolation
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 optimizes power consumption and airflow, ensuring effective component cooling with reduced energy usage and minimizing airflow conflicts, thereby enhancing the efficiency and acoustics of the cooling system.
Implementation Method 1
a thermal sensor located in the chassis
Implementation Method 2
each of the plurality of fan zones includes at least one fan
Data Source
AI summary
A cooling system includes a chassis. A thermal sensor is located in the chassis. A plurality of fan zones are located in the chassis. Each of the plurality of fan zones includes at least one fan. A first mapping is provided between the thermal sensor and a first fan zone of the plurality of fans zone, and a second mapping is provided between the first fan zone and a second fan zone in the plurality of fan zones. A controller is coupled to the thermal sensor and the at least one fan in each of the plurality of fan zones. In response to receiving a signal from the thermal sensor, the controller is operable to activate the at least one fan in the first fan zone according to the first mapping and activate the at least one fan in the second fan zone according to the second mapping.