Pivotable Baffle Airflow Assembly for Rack-Height NEBS Compliance

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Solution Overview

Problem

Existing ventilation systems for network equipment racks require additional height and components to achieve NEBS-compliant airflow, leading to increased costs and reduced vertical density, and often fail to meet airflow direction requirements.

Innovation Solution

A mount plate with a pivotable baffle and accordion pleats that can be expanded to redirect airflow in a front-to-back direction, integrated into a casing or shelf system, allowing for improved airflow control without increasing the system's height.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional ventilation systems are added to achieve NEBS-compliant airflow, then airflow direction compliance is improved, but rack height is increased and vertical density is reduced

Engineering Contradiction:

ImproveNEBS airflow complianceVSAvoidrack height

Core Design Contradiction:

ReliabilityVSLength of stationary object

Solution Approach 1:

The baffle is made pivotable rather than fixed, allowing it to be positioned in different orientations. When pivoted to a vertical position, it redirects airflow from side-to-side to front-to-back direction, achieving NEBS compliance without requiring additional rack height. The dynamic positioning capability enables the same structure to serve multiple airflow configuration needs.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

Instead of adding airflow control in the vertical dimension (which would increase rack height), the invention uses the horizontal dimension by pivoting the baffle to redirect airflow laterally. This dimensional approach allows NEBS compliance to be achieved within the existing rack height constraints by utilizing horizontal space and airflow redirection.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Adaptability or versatility

If traditional ventilation systems with multiple trays and ducts are installed, then airflow control capability is improved, but device complexity and installation labor are increased

Engineering Contradiction:

Improveairflow control capabilityVSAvoidnumber of components

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The invention combines the airflow redirection function into a single integrated baffle component that is attached to the equipment casing itself, rather than requiring separate trays, ducts, and baffles. This consolidation reduces the number of parts from multiple components to essentially one key component, simplifying both the device structure and installation process.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The single baffle component serves multiple functions: it acts as an airflow redirector, a structural support element, and a configurable control mechanism. By making the baffle pivotable, it can adapt to different airflow requirements (front-to-back or side-to-side) without requiring additional specialized components for each configuration.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Manufacturing precision

If separate ducting systems are added for airflow control, then airflow direction precision is improved, but manufacturing cost and installation time are increased

Engineering Contradiction:

Improveairflow direction precisionVSAvoidinstallation time

Core Design Contradiction:

Manufacturing precisionVSLoss of time

Solution Approach 1:

The baffle is pre-configured with hinge attachments that enable straightforward installation directly onto the equipment casing. This preliminary preparation of mounting mechanisms eliminates the need for complex on-site ducting construction and reduces installation time, while the baffle's inherent design ensures precise airflow direction control is achieved immediately upon installation.

Inventive Principle:

Principle #10Preliminary action

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 solution enhances airflow capacity and compliance with NEBS standards while maintaining rack height, ensuring effective cooling of network components.

Implementation Method 1

the baffle may be configured to redirect the airflow in a front-to-back direction through the casing

Methodology Applied

Scientific EffectFluid flow redirection:

Implementation Method 2

The top accordion pleat and bottom accordion pleat may be configured to limit the movement of the baffle with respect to the mount plate to within the range of positions

Methodology Applied

Scientific EffectMechanical constraint:

Data Source

PatentUS12439567B2Front-to-rear airflow assembly for an equipment casing mounted on a rack

Publication Date: 2025.10.07 CIENA CORP

AI summary

Systems and methods for controlling airflow through a casing or shelf assembly are provided. An apparatus, according to one implementation, includes a mount plate configured to be attached to a side panel of a casing for housing network equipment. For example, the mount plate may include a window. The apparatus also includes one or more hinges arranged at an edge of the window of the mount plate and a baffle pivotably attached to the one or more hinges. The baffle can be arranged within a range of positions with respect to the mount plate to control an amount of airflow through the window. Within these range of positions, the baffle is configured to redirect the airflow in a front-to-back direction through the casing.