Server Fan Cage Side Wall With Rotational Flapper Sealing

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Solution Overview

Problem

Existing thermal sealing solutions for server fan components in information handling systems often fail to accommodate multiple cables, leading to airflow leakage and reduced thermal performance, as they are designed for limited cable configurations and can be deformed by excessive cables.

Innovation Solution

A fan cage side wall system with a rotational flapper that can be set to an open or closed orientation, incorporating a thinner thermal sponge for sealing, allowing it to accommodate various cable configurations and improve thermal performance by restricting airflow when not populated with cables.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If existing thermal sealing solutions are used for server fan components, then thermal sealing is provided for limited cable configurations, but the solutions fail to accommodate multiple cables leading to airflow leakage and reduced thermal performance

Engineering Contradiction:

Improvecable configuration accommodationVSAvoidthermal performance

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The side wall component is designed with a rotational flapper that can pivot between an open position (allowing cable passage) and a closed position (sealing the opening). This dynamic mechanism allows the same component to adapt to different cable configurations while maintaining thermal sealing performance when cables are not present, resolving the contradiction between adaptability and reliability.

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If existing thermal sealing solutions are used, then sealing is provided for the fan cage, but the solutions can be deformed by excessive cables

Engineering Contradiction:

Improvecable population flexibilityVSAvoidsealing structure integrity

Core Design Contradiction:

Adaptability or versatilityVSStrength

Solution Approach 1:

The side wall component is divided into separate functional elements: a rigid housing structure and a rotational flapper. The flapper is specifically designed to bear the mechanical load of multiple cables while the main housing maintains structural integrity. This segmentation allows the sealing structure to accommodate excessive cables without deformation while maintaining overall strength.

Inventive Principle:

Principle #1Segmentation

3Adaptability or versatility

If the rotational flapper is set to open orientation for cable population, then multiple cables can be accommodated, but airflow restriction is reduced

Engineering Contradiction:

Improvecable installation capabilityVSAvoidairflow leakage

Core Design Contradiction:

Adaptability or versatilityVSLoss of energy

Solution Approach 1:

The rotational flapper dynamically switches between open and closed states based on cable presence. When cables are installed, the flapper rotates to an open position to accommodate them. When cables are absent, the flapper returns to a closed position to seal the opening and prevent airflow leakage, thus minimizing energy loss while maintaining adaptability.

Inventive Principle:

Principle #15Dynamics

4Adaptability or versatility

If a thinner thermal sponge is used for sealing, then the system can accommodate various cable configurations, but the sealing challenge increases

Engineering Contradiction:

Improvecable configuration varietyVSAvoidsealing implementation

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The rotational flapper acts as an intermediary mechanism between the thermal sponge and the external environment. It provides a mechanical seal that supplements the thinner thermal sponge, allowing the system to accommodate various cable configurations while maintaining effective sealing. This intermediary approach reduces the manufacturing complexity compared to using a thick, complex sealing structure.

Inventive Principle:

Principle #24Intermediary (Mediator)

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

The system enhances thermal sealing and performance by accommodating multiple cables while maintaining airflow control, suitable for 1U, 2U, 3U, or 4U server configurations, thus improving the efficiency of server thermal management.

Implementation Method 1

the closed orientation restricting air flow through the fan cage side all system

Methodology Applied

Scientific EffectAirflow restriction:

Implementation Method 2

incorporating a thinner thermal sponge for sealing

Methodology Applied

Scientific EffectThermal insulation: Thermal Insulation

Data Source

PatentUS20250393170A1Server System Thermal System

Publication Date: 2025.12.25 DELL PROD LP

AI summary

An information handling system thermal system. The thermal system includes a fan cage and a fan cage side wall system positioned between the fan cage and a wall of an information handling system chassis, the fan cage side wall system comprising a rear housing component, the rear housing component comprising a rotational flapper, the rotational flapper being configured to be set to one of an open orientation and a closed orientation, the open orientation allowing the fan case side wall system to be populated with a cable, the closed orientation restricting air flow through the fan cage side all system; a front housing component; and, a bottom housing component, the bottom housing component being physically coupled between the rear housing component and the front housing component.