Tool-Free Filter Holding Frame With Flexible Retainers
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Solution Overview
Problem
Conventional air handling systems require time-consuming and costly processes to install and remove filters due to the need for various mechanical fasteners and clamping mechanisms, leading to inefficiencies in filter maintenance.
Innovation Solution
A filter holding frame with a rectangular ring design featuring rigid and flexible retainers that allow for tool-free installation and removal of filters, eliminating the need for secondary mechanical fasteners by using a flange and retainer system to secure filters within the frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical clamping mechanisms and fasteners are used to secure filters, then filtration element sealing and prevention of bypass is improved, but installation and removal time increases significantly
Solution Approach 1:
The patent replaces traditional mechanical fastening systems (screws, clips, clamps) with a friction-based retention system. The filter holder uses a rectangular ring structure with inner surfaces that create frictional engagement with the filtration element, allowing secure retention without mechanical fasteners. This substitution eliminates the need for tools while maintaining sealing effectiveness through the frictional force between the holder's inner surfaces and the filter element.
Solution Approach 2:
The filter holder design allows the filtration element to self-retain through frictional engagement with the holder's inner surfaces. The element's own dimensions and the holder's geometry work together to create the retention force, eliminating the need for separate fastening mechanisms. The element essentially secures itself through the frictional interaction with the holder structure.
2Adaptability or versatility
If multiple types of fasteners and clips are used to accommodate various filter sizes, then adaptability to different filter types is improved, but device complexity and inventory requirements increase
Solution Approach 1:
The rectangular ring filter holder is designed as a universal component that can accommodate multiple filter types and sizes through a single design. The inner surfaces of the ring can engage with different filter dimensions using the same friction-based retention mechanism, eliminating the need for multiple specialized fasteners. The holder's geometry allows it to function with various filter configurations without requiring different fastening systems.
Solution Approach 2:
The patent utilizes parameter changes in the filter element dimensions and materials to achieve adaptability. By varying the size and material properties of the filtration elements, the same holder design can accommodate different filter types. The frictional retention force adapts to different parameters of the filter elements, allowing a single holder design to serve multiple purposes without requiring physical modifications or different fastener types.
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 simplifies filter replacement and maintenance by reducing labor and costs associated with filter change-outs, as filters can be easily inserted and removed without tools, and the frame can accommodate various filter sizes without the need for multiple fasteners or specialized tools.
Implementation Method 1
The flexible retainer is configured to bend and deflect upon contact to permit entry of the filter element into the filter holder and has a resiliency sufficient to return to its original position
Data Source
AI summary
Embodiments of the invention generally provide a holding frame having at least one rigid retainer and/or flexible retainers. The holding frame assembly is typically mounted in a housing of an air handler or other air moving conduit. The rigid retainer(s) and flexible retainer(s) are coupled to the holding frame assembly to define filter retaining pockets that retain a final filter within the holding frame assembly without use of clips and other fastening mechanisms.