Air Filter Element Asymmetric Conical Retaining Geometry
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Solution Overview
Problem
Existing air filter elements face challenges in reliable and accurate positioning within air filter housings, particularly during replacement by less qualified personnel, which can lead to operational inefficiencies and compromised seal integrity.
Innovation Solution
The air filter element features a holding arrangement with radially protruding bulges and a sealing arrangement with a sealing line that encircles the filter medium, along with recesses for precise alignment and a conical shape for easier installation, ensuring correct positioning and sealing between the raw and clean air sides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the filter element is designed with simple geometry, then manufacturing is easier, but positioning accuracy and seal reliability deteriorate
Solution Approach 1:
The filter element incorporates an asymmetric conical shape with a wider top and narrower base, along with asymmetric positioning elements (protrusions and recesses) that are specifically oriented to ensure correct installation direction. This asymmetric design guides untrained personnel to install the filter correctly while maintaining simple manufacturing processes.
Solution Approach 2:
The filter element employs a conical geometry with curved surfaces instead of sharp edges or complex angular features. The conical shape with smooth curvature simplifies manufacturing while providing inherent alignment guidance during installation, improving positioning accuracy without requiring complex manufacturing steps.
2Ease of manufacture
If the filter element is designed with simple geometry, then manufacturing is easier, but seal integrity deteriorates
Solution Approach 1:
The sealing surface is designed with a conical curvature that matches the housing interface, providing continuous contact across the sealing surface. This curved geometry ensures uniform seal compression and reliable sealing between the raw air and clean air sides, while the conical shape itself is simple to manufacture using standard molding or forming processes.
3Manufacturing precision
If positioning elements are added outside the sealing line, then positioning accuracy improves, but device dimensions increase
Solution Approach 1:
The positioning protrusions and recesses are integrated directly into the conical body of the filter element, merging the positioning function with the structural form. No separate positioning elements or additional components are required outside the sealing line, maintaining compact dimensions while ensuring accurate positioning through the conical geometry and integrated features.
Data Source
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AI summary
Disclosed is an air filter element (200) for insertion into an air filter housing, comprising an intake surface (275), a discharge surface (285), a filter medium (210), and a filter element-retaining device (240) which extends along at least a section of the periphery of the filter medium (210), between the intake surface (275) and the discharge surface (285), and which includes a retaining arrangement (270) that radially projects from the filter medium (210).