Vehicle Air Filter Frame Notch Guidance Design
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Solution Overview
Problem
Existing air filters for motor vehicle ventilation devices require complex designs to accommodate guide pins and recesses, making them difficult to insert and remove reliably.
Innovation Solution
The air filter features notches on the frame wall's edge, designed as undercuts, allowing for guidance in two directions without additional recesses within the filter medium, enabling easy insertion and removal by aligning with guide elements on the ventilation device's side.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If guide pins and recesses are used to guide the air filter, then the air filter can be guided during insertion, but the design becomes complex and requires additional recesses within the filter medium
Solution Approach 1:
The invention extracts the guidance function from the interior of the filter medium and relocates it to the exterior frame wall. By providing notches on the outer perimeter of the frame wall, the guidance function is separated from the filter medium structure, eliminating the need for complex internal recesses while maintaining reliable guidance during insertion and removal.
Solution Approach 2:
Instead of providing guidance elements inside the filter medium (conventional approach), the invention inverts the approach by placing guidance notches on the outer frame wall. This inversion simplifies the overall design by moving the complexity from the filter medium to the frame, where it is more easily accommodated.
2Reliability
If multiple cutouts are provided in the frame wall for guide pins, then guidance is improved, but the frame wall design becomes more complex
Solution Approach 1:
The guidance function is segmented into multiple discrete notches positioned at specific locations on the frame wall perimeter. These notches are strategically placed to engage with corresponding guide elements on the mounting shaft, providing reliable guidance through distributed contact points rather than requiring complex continuous internal structures.
3Reliability
If guide elements are integrated within the filter medium, then guidance is achieved, but the filter medium structure is compromised
Solution Approach 1:
The guidance function is extracted from the filter medium and relocated to the frame wall. This separation preserves the filter medium's structural integrity and filtering function, while the frame wall assumes the guidance role through externally positioned notches that do not interfere with the filter medium's composition or performance.
Data Source
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AI summary
The invention relates to an air filter (10) for a ventilation device (14) of a motor vehicle, having an areal extent along which the air filter (10) can be inserted, transversely with respect to a flow direction, into a flow cross section (12) of the ventilation device (14), and having a filter medium (26) which is arranged along the areal extent of said air filter and which is delimited at least in regions by at least one frame wall (16), which frame wall has at least one recess (28) which, for the guidance of the air filter (10) during the insertion into the flow cross section (12), can be placed in engagement with guide elements (40, 42) of the ventilation device (14), which recess is in the form of a notch on an edge (27) of the frame wall (16) and is of undercut design in relation to the edge (27), whereby it is made possible for the air filter (10) to be supported in two directions transversely with respect to the insertion direction during the insertion process.