HVAC Filter Housing with Adjustable Seating Rails

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Solution Overview

Problem

Existing filter housings in HVAC ducts are limited by requiring specific filter dimensions, making it impossible to change filter types without modifying the ventilation system, as each filter size necessitates a unique fitting, restricting consumer flexibility.

Innovation Solution

A filter housing design with registration flanges and removable seating rail assemblies that accommodate filters of varying thicknesses along the flow path, allowing for the use of different filter types within a common periphery without modifying the duct, using access ports and retaining mechanisms to securely hold filters between registration flanges and seating rail assemblies.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a filter housing is designed with a fixed fitting for a specific filter size, then the filter can be securely retained, but the housing cannot accommodate filters of different dimensions

Engineering Contradiction:

Improveability to accommodate different filter sizesVSAvoidcomplexity of the filter housing structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The filter housing is divided into modular components: a fixed duct structure with registration flanges and removable seating rail assemblies. The seating rails can be detached and repositioned to accommodate different filter thicknesses, while the main duct structure remains fixed. This segmentation allows versatility without requiring complete structural redesign.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The seating rail assemblies are designed to be removable and repositionable along the duct, allowing the housing to dynamically adapt to different filter dimensions. The rails can be taken out and reinstalled at different positions to match various filter thicknesses, providing flexibility while maintaining structural integrity.

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If different filter types with varying thicknesses are used, then consumer flexibility is improved, but the filter housing structure becomes more complex

Engineering Contradiction:

Improveflexibility to change filter typesVSAvoidcomplexity of the housing structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The filter housing is designed as a universal structure that can accommodate multiple filter types (panel filters, pleated filters, HEPA filters, electronic air cleaners) with different thicknesses. The registration flanges and adjustable seating rails create a multi-functional housing that works with various filter configurations without requiring different housing designs.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The solution addresses the thickness dimension by making the seating rails removable and repositionable along the longitudinal axis of the duct. This allows the housing to adapt to filters of varying thicknesses (1 inch to 5 inches) by adjusting the rail position, effectively using dimensional adjustment to achieve versatility.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Reliability

If a unique fitting is created for each filter size, then the filter can be precisely retained, but the ventilation system requires modification to change filter types

Engineering Contradiction:

Improvesecure retention of filterVSAvoidease of system modification

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The registration flanges are pre-installed on the duct structure to establish reference points for filter positioning. The seating rails are designed to be removable and repositionable along these flanges, allowing different filter types to be accommodated by simply moving the rails rather than modifying the entire ventilation system.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The removable seating rail assemblies act as intermediaries between the fixed duct structure and the various filter types. These rails provide the secure retention mechanism while being easily repositionable to accommodate different filter dimensions, eliminating the need to modify the ventilation system itself when changing filter types.

Inventive Principle:

Principle #24Intermediary (Mediator)

4Adaptability or versatility

If the filter housing accommodates multiple filter types, then consumer flexibility is enhanced, but the installation complexity increases

Engineering Contradiction:

Improveability to use various filter typesVSAvoidcomplexity of installation process

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The housing is segmented into a fixed duct portion and removable seating rail assemblies. This segmentation simplifies installation because the rails can be independently positioned and adjusted after the main duct is installed, reducing the overall installation complexity while maintaining versatility.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS8647405B2Filter housing for accommodating a plurality of filter sizes

Publication Date: 2014.02.11 GRAY RICHARD E JR

AI summary

A filter housing includes a duct having at least one registration flange and an access port sized to pass a plurality of seating rail assemblies. Each seating rail assembly is releasably engaged with the duct includes a seating flange. By locating the seating rail assembly at a particular distance from the registration flange, a channel of different sizes can be formed for receiving a filter having a corresponding dimension.