Overmold Filter Cell Seal for Stackable Lenticular Filtration
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Solution Overview
Problem
Existing lenticular filtration assemblies require active follower systems for maintaining seal integrity, which occupy additional space and are vulnerable to failure due to debris or loss of pre-compression, especially when used in stacked configurations.
Innovation Solution
The implementation of a filter cell element with an overmold seal at the media pack edge, which directly or indirectly seals the media pack to a separator element, eliminating the need for an active follower system by using a polymeric material for the seal, such as an elastomeric polymeric material, and integrating a central hub arrangement for leak-tight bonding of multiple filter cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an active follower system with pre-compression is used to maintain seal integrity, then the seal reliability is improved, but the device complexity and space requirements increase
Solution Approach 1:
The patent removes the active follower system and pre-compression mechanism from the filter assembly, replacing them with a passive seal design where the seal is integrated into the filter element structure itself, eliminating the need for separate compression components
Solution Approach 2:
The seal is merged with the filter element housing and media pack structure, creating an integrated sealing solution where the seal becomes part of the overall filter assembly rather than a separate component requiring active maintenance
2Reliability
If an active follower system is used to maintain seal compression, then the seal reliability is improved, but the space occupied by the assembly increases
Solution Approach 1:
The patent eliminates the follower system and pre-compression components that occupy additional space, achieving seal integrity through a more compact integrated design where the seal is built into the filter element structure
Solution Approach 2:
By merging the seal with the filter element structure, the patent reduces the overall assembly volume while maintaining sealing effectiveness, as the seal becomes an integral part rather than an add-on component
3Reliability
If knife edge seals with pre-compression are used, then the seal effectiveness is improved, but the vulnerability to debris and pre-compression loss increases
Solution Approach 1:
The patent changes the local sealing geometry from knife edges to a different contact surface configuration that is less sensitive to debris, with the seal surface designed to be more tolerant of contaminant presence
Solution Approach 2:
The seal is designed as a simple, robust component that can withstand harsh conditions without requiring maintenance, effectively treating it as a disposable element that maintains reliability throughout the filter element's service life
4Productivity
If multiple filter cells are stacked with knife edge seals, then the filtration capacity is improved, but the number of potential seal failure points increases
Solution Approach 1:
By removing the knife edge seal design and pre-compression mechanism from each stacked filter cell, the patent reduces the number of potential failure points while maintaining the ability to stack multiple cells for increased filtration capacity
Solution Approach 2:
The integrated seal design allows filter cells to be stacked with fewer interface components, reducing the total number of seals and potential failure points while maintaining high filtration capacity through efficient cell stacking
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution provides a space-efficient, reliable sealing mechanism that prevents bypass and reduces the risk of seal failure, allowing for the stacking of filter cells without the need for active compression, thereby enhancing the durability and performance of lenticular filtration assemblies.
Implementation Method 1
The overmold seal may be a polymeric material, such as an elastomeric polymeric material
Data Source
AI summary
A filter cell element for use in a housing to form a filtering assembly. The filter element has a media pack having an interior and a separator element having a passage therein for radial fluid communication between the media pack interior and an edge of the media pack. An overmold seal at the media pack edge seals the media pack to the separator element. Methods of making the filter element and methods of using are also disclosed.