Spring-Loaded Flapper Air Shroud for IHS Sled Thermal Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The removal of a sled from an Information Handling System (IHS) chassis creates an airflow bypass channel that negatively impacts the cooling of adjacent sleds, leading to thermal concerns and reduced maintenance performance.
Innovation Solution
A dynamic airflow management mechanism featuring an air shroud with flappers coupled to springs, which remain open when the tray is retracted and closed when extended, mitigating the airflow bypass channel and maintaining mechanical impedance similar to a fully inserted tray.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a sled is drawn out from a chassis for service, then maintenance accessibility is improved, but thermal performance of adjacent sleds deteriorates due to airflow bypass
Solution Approach 1:
An air shroud assembly acts as an intermediary component between the removed sled and adjacent sleds. The shroud includes flappers that can be opened to allow maintenance access when a sled is removed, while still providing airflow management to prevent bypass channels that would harm thermal performance of neighboring components.
Solution Approach 2:
The air shroud employs dynamic flappers that can change position between open and closed states. When a sled is present, flappers remain closed to maintain proper airflow. When a sled is removed for maintenance, flappers can open to allow access while still managing airflow to prevent thermal issues in adjacent sleds.
2Duration of action of moving object
If a sled is removed from the chassis, then service time is extended, but cooling efficiency of the chassis deteriorates due to created airflow bypass channel
Solution Approach 1:
The air shroud serves as a mediator that allows the sled to be removed for extended service while preventing the creation of harmful airflow bypass channels. The flappers can open to facilitate maintenance activities but still manage airflow to maintain cooling efficiency in the absence of the sled.
3Temperature
If flappers are kept closed to maintain airflow, then thermal performance is improved, but maintenance accessibility is reduced
Solution Approach 1:
The flappers are designed to be dynamic rather than fixed, allowing them to open when maintenance is needed and close when the sled is properly installed. This dynamic behavior resolves the contradiction by providing thermal protection during normal operation while enabling maintenance access when required.
Solution Approach 2:
The air shroud system can automatically respond to the presence or absence of a sled, with flappers opening or closing based on whether maintenance access is needed. This self-service capability allows the system to maintain thermal performance while facilitating maintenance without requiring manual intervention to balance the two requirements.
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 significantly improves the operating performance of adjacent sleds by reducing temperature fluctuations, allowing for extended service time without thermal issues, with a notable 87.5% improvement in CPU temperature increase when servicing a sled.
Implementation Method 1
a first flapper coupled to the frame via a first spring, and a second flapper coupled to the frame via a second spring
Data Source
AI summary
Systems and methods for airflow management in an Information Handling System (IHS) chassis are described. In some embodiments, an air shroud may include a frame configured to be coupled to a rear portion of a sled insertable into a chassis of an IHS, a first flapper coupled to the frame via a first spring. and a second flapper coupled to the frame via a second spring.