Dual Bellow Filter with Rib Channels for Airflow Continuity
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Solution Overview
Problem
Existing air cleaner filter assemblies fail to maintain adequate airflow to motor vehicle engines in extreme conditions such as heavy snow or dust, as the primary filter can collapse under pressure, preventing air from reaching the secondary filter.
Innovation Solution
A filter assembly with a primary and secondary filter, where the frame includes rib elements to prevent sealing between the filters, allowing airflow from the secondary filter when the primary filter is clogged, and comprising pleated media with a resilient frame and rigid housing to ensure clean intake air.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the frame seals between the primary filter and secondary filter, then air flow is directed through the primary filter, but the primary filter can collapse under pressure in extreme conditions preventing air flow from the secondary filter
Solution Approach 1:
The frame is divided into multiple channels separated by rib elements, creating distinct airflow paths. This segmentation ensures that even if one path is blocked or sealed, alternative paths remain open, preventing complete airflow interruption and maintaining reliability under extreme conditions.
Solution Approach 2:
Different portions of the frame have different sealing characteristics. The rib elements create localized non-sealing zones within the channels, allowing controlled airflow while maintaining overall frame structure. This local variation in sealing quality enables the frame to adapt to pressure changes without compromising airflow continuity.
2Quantity of substance
If the primary filter is made larger with more pleated media, then filtration capacity is increased, but the filter assembly complexity increases
Solution Approach 1:
The secondary filter is positioned within the same housing as the primary filter, utilizing the available space efficiently. This nested arrangement allows both filters to be included in a single assembly, increasing total filtration capacity while avoiding the need for separate filter housings and reducing overall system complexity.
Solution Approach 2:
The frame structure serves multiple functions: it supports both filters, directs airflow between them, and provides structural integrity. By making the frame multi-functional, the design avoids adding separate support structures that would increase complexity, while still accommodating the larger primary filter with more pleated media.
Data Source
AI summary
A filter assembly for a motor-vehicle air cleaner includes a primary filter, a secondary filter set apart from the primary filter, and a filter frame configured to support the primary filter and the secondary filter. The filter mount is fittable in and removable from a housing of the air cleaner, and includes a divider passing between the main filter and the auxiliary filter, the divider including at least two channels separated by a rib.