Framed Air Filter Stabilizing Flap Corner Bonding
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Solution Overview
Problem
Existing air filters in forced air systems face challenges in maintaining mechanical stability, especially at corners, which can lead to reduced effectiveness in filtering dust and dirt particles.
Innovation Solution
A framed air filter design featuring a frame with four portions, where at least one corner is a bonded, non-integral corner with a stabilizing flap that extends from one frame portion to another, enhancing mechanical stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a framed air filter is used in forced air systems, then dust and dirt particles can be removed from air, but mechanical stability at corners is insufficient leading to reduced filtering effectiveness
Solution Approach 1:
The stabilizing flap extends from the front surface of the first frame portion into the interior space of the frame, adding a third-dimensional element that bridges the corner gap. This dimensional extension allows the flap to provide structural reinforcement by physically connecting adjacent frame portions that meet at non-perpendicular angles, thereby stabilizing the corner structure and preventing deformation that would compromise filtering effectiveness.
2Strength
If frame corners are made integral for strength, then mechanical strength improves, but manufacturing complexity and assembly difficulty increase
Solution Approach 1:
The frame is divided into separate frame portions that are manufactured independently and then assembled using bonded corners with stabilizing flaps. This segmentation allows each frame portion to be produced separately through simple processes, and the stabilizing flap provides sufficient corner strength through adhesive bonding rather than requiring complex integral corner formations, thus maintaining strength while simplifying manufacturing and assembly.
3Ease of manufacture
If bonded non-integral corners are used to simplify assembly, then assembly ease improves, but mechanical stability deteriorates
Solution Approach 1:
The stabilizing flap acts as an intermediary element between adjacent frame portions at bonded corners. It provides additional surface area for adhesive bonding and creates a mechanical bridge that reinforces the corner connection, thereby maintaining the simplicity of assembled bonded corners while significantly improving corner stability and resistance to out-of-plane twisting.
Data Source
AI summary
A framed air filter that includes air filter media and a frame with four frame portions. At least one corner of the frame is a bonded, non-integral corner at which a stabilizing flap that integrally extends from a first frame portion of a pair of neighboring frame portions that meet to form the non-integral, bonded corner, is affixed to an inner sidewall of a second frame portion of the pair of neighboring frame portions.