Automatic Cooling Region Coupling During Fan Maintenance
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Solution Overview
Problem
Modern computer systems with modular cooling systems face reliability issues due to the high failure rate of moving parts in fans, leading to increased costs and complexity with the use of redundant fans to compensate for these failures.
Innovation Solution
The system automatically couples airflow from two separate cooling regions in a computer chassis using a first fan module, allowing continuous airflow even when one fan module is removed or fails, eliminating the need for redundant fans in each region by using a backflow damper and a redundant fan module that can increase power when needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If redundant fans are used to compensate for fan failure, then system reliability is improved, but system complexity and cost increase
Solution Approach 1:
The patent merges the cooling functions of two separate cooling regions by allowing the first fan module to serve both regions when the second fan module is removed. The bypass opening in the chassis wall enables airflow from the first cooling region to extend into the second cooling region, combining their cooling functions into a single operational unit and eliminating the need for redundant fan modules.
Solution Approach 2:
The first fan module is designed to perform multiple functions: it cools the first cooling region under normal operation and automatically extends to cool the second cooling region when the second fan module is removed. This multi-functionality allows a single fan module to provide redundancy and maintain system reliability without requiring dedicated backup fans for each cooling region.
2Reliability
If redundant fans are used to compensate for fan failure, then system reliability is improved, but power consumption increases
Solution Approach 1:
The patent merges the cooling functions of two separate cooling regions by allowing the first fan module to serve both regions when the second fan module is removed. The bypass opening in the chassis wall enables airflow from the first cooling region to extend into the second cooling region, combining their cooling functions into a single operational unit and eliminating the need for redundant fan modules.
Solution Approach 2:
The system automatically detects when the second fan module is removed and self-adjusts by having the first fan module serve both cooling regions. The backflow damper automatically opens to allow airflow coupling, and the first fan module's speed is increased to compensate for the missing second fan module, maintaining cooling effectiveness without requiring manual intervention or additional power-consuming backup systems.
3Productivity
If independent cooling regions are separated by a chassis wall, then cooling efficiency is improved, but airflow flexibility is reduced
Solution Approach 1:
The chassis wall separating the two cooling regions incorporates a bypass opening that can dynamically change its airflow state. When the second fan module is installed, the bypass opening is blocked to maintain independent cooling regions for optimal cooling efficiency. When the second fan module is removed, the bypass opening automatically opens to allow airflow coupling, providing adaptability and flexibility to maintain cooling effectiveness under different operational conditions.
Solution Approach 2:
The bypass opening acts as an intermediary mechanism between the two cooling regions. It provides a controlled pathway that can be opened or blocked based on the presence of the second fan module, allowing the system to transition between independent and coupled cooling region configurations. This intermediary structure enables airflow flexibility while maintaining the physical separation of the cooling regions.
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 configuration enhances system reliability and reduces costs and power consumption by allowing for uninterrupted operation during fan maintenance or failure, while maintaining continuous cooling without the need for redundant fans in each cooling region.
Implementation Method 1
A backflow damper is biased toward a closed position to close off the second fan bay when there is no fan module in the second fan bay
Implementation Method 2
a first fan module is in the installed position in the first fan bay for generating airflow through the first cooling region
Data Source
AI summary
In a computer system, airflow through first and second cooling regions are normally separated by a chassis wall, and are independently controlled by respective first and second fan modules. The internal chassis wall includes a bypass opening that is normally blocked by the second fan module. In response to removal of the second fan module, the bypass opening is unblocked, to fluidly couple the two cooling regions. A redundant fan module is optionally included in fluid communication with the first cooling region, to either generate airflow through the first cooling region in response to failure or removal of the first fan module, or to supplement the airflow capacity of the first fan module in response to removal of the second fan module.