Movable Sound Baffle Columns for Compact Air Handling Units

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Solution Overview

Problem

Conventional air handling units (AHUs) have a large footprint due to the need for permanent, immobile sound-attenuating baffles, which increases costs and reduces competitiveness, as these units require significant clearance for maintenance and operation, affecting aerodynamic resistance when in operation.

Innovation Solution

Movable baffle columns that can be rolled or slid within the AHU housing, allowing for a smaller footprint when not in use, and returning to functional positions before reactivation, utilizing tracks and rollers for movement and locking mechanisms for secure positioning.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If permanent, immobile sound-attenuating baffles are installed in the AHU, then sound attenuation performance is improved, but the AHU footprint increases due to required clearance for maintenance and operation

Engineering Contradiction:

Improvesound attenuation performanceVSAvoidAHU footprint

Core Design Contradiction:

Object-affected harmful factorsVSArea of stationary object

Solution Approach 1:

The baffle columns are made movable rather than fixed, allowing them to be repositioned between a first position during operation and a second position during maintenance. This dynamic configuration eliminates the need for permanent clearance zones, reducing the AHU footprint while maintaining sound attenuation performance when needed.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The sound attenuation system is divided into multiple movable baffle columns that can be independently positioned. These segmented baffles can be moved to different locations to optimize both operational performance and maintenance access, resolving the contradiction between fixed sound attenuation and flexible maintenance clearance.

Inventive Principle:

Principle #1Segmentation

2Ease of repair

If large clearance is reserved for maintenance access to immobile baffles, then ease of maintenance is improved, but the AHU footprint and aerodynamic resistance increase

Engineering Contradiction:

Improvemaintenance access clearanceVSAvoidAHU footprint

Core Design Contradiction:

Ease of repairVSArea of stationary object

Solution Approach 1:

Inventive Principle:

Principle #15Dynamics

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 design reduces the overall footprint of AHUs by approximately 24 inches, enabling more economical and compact systems without compromising sound attenuation or airflow performance, and allows for easier maintenance access when needed.

Implementation Method 1

Movable baffle columns that can be rolled or slid within the AHU housing, utilizing tracks and rollers for movement

Methodology Applied

Scientific EffectFriction: Friction

Implementation Method 2

locking mechanisms for secure positioning

Methodology Applied

Scientific EffectMechanical Force: Mechanical Force

Data Source

PatentUS7581619B1Movable baffle columns for use with air handling units

Publication Date: 2009.09.01 ENERGY LABS

AI summary

A sound-baffling arrangement for use in conjunction with an air-handling unit. One or more sound baffle columns are mounted for rolling or sliding movement within the interior of the air handling unit housing. Each baffle column may be selectively moved between a use position proximate to the fan assemblies, and a non-use position more distal from the fan assemblies. The movable sound baffles permit the air-handling unit to be fabricated to fit within a smaller housing, and thus to have a smaller, more economical footprint.