Z-Filter Cartridge Sealing at Flute Ends With Reduced Sealant
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Solution Overview
Problem
Existing straight through flow filters face challenges in maintaining effective seals at flute ends, requiring large sealant surface areas and volumes, which can lead to operational issues.
Innovation Solution
The use of z-filter media constructions with fluted sheets and facing sheets, secured together with sealant beads, and configured to prevent unfiltered air flow, along with a frame and seal support section to enhance sealing and filtration efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional sealant methods are used at flute ends, then sealing coverage is achieved, but sealant volume and surface area requirements increase
Solution Approach 1:
The seal support section is divided into multiple discrete sealant application zones corresponding to individual flute ends, allowing targeted sealing only where needed rather than applying sealant across the entire filter surface. This segmentation reduces total sealant volume while maintaining sealing effectiveness at critical locations.
Solution Approach 2:
The seal support section provides enhanced local sealing capability at flute ends through a dedicated structured design, concentrating sealing resources where leakage is most likely to occur. This local quality enhancement allows reduced sealant application in non-critical areas while maintaining overall seal integrity.
2Reliability
If traditional sealant methods are used at flute ends, then sealing coverage is achieved, but sealant surface area increases
Solution Approach 1:
The sealing surface is segmented into discrete zones at flute ends through the seal support section structure, concentrating sealant application to specific small areas rather than spreading it across large surfaces. This reduces total sealant surface area while maintaining effective sealing at critical flute end locations.
Solution Approach 2:
The seal support section creates localized high-quality sealing surfaces at flute ends where sealing is most needed, rather than providing uniform sealing coverage across the entire filter. This local concentration reduces overall sealant surface area requirements.
3Reliability
If z-filter media construction is used, then filtration reliability is improved, but device complexity increases
Solution Approach 1:
The seal support section is integrated directly into the media pack structure, combining the sealing function with the filtration media assembly. This merging reduces overall device complexity by eliminating separate sealing components while maintaining filtration reliability through the z-filter media construction.
Solution Approach 2:
The seal support section serves multiple functions: it provides structural support for the media pack, creates sealing surfaces at flute ends, and maintains the geometric alignment of the z-filter media. This multi-functionality reduces the need for additional components, simplifying the overall device while improving filtration reliability.
Data Source
AI summary
A filter cartridge includes a media pack having first and second opposite flow faces; the media pack comprising flutes extending in a direction between the inlet flow face and the outlet flow face; a frame mounted on the second flow face of the media pack; a seal support section extending from the base member; and first and second opposite and spaced blades extending from the base member and in a different direction from the base member as the seal support section. The first and second blades are embedded within the media pack through the second flow face. A seal member is oriented against the seal support section. The filter cartridge can be removably oriented in a cassette. The cassette and filter cartridge are removably oriented in an air cleaner housing. The cassette may include lugs to help position the cartridge in sealing engagement with the air cleaner housing. In another embodiment, the filter cartridge is cassette-free and includes a cartridge-handle projecting therefrom.