Z-Filter Media Pack Radial Seal and Drain Aperture
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Solution Overview
Problem
Existing air filter arrangements face challenges in effectively filtering contaminant materials from air streams, particularly in systems like motorized vehicles and gas turbine systems, due to issues with sealing and maintaining the integrity of z-filter media constructions.
Innovation Solution
The development of a z-filter media pack configuration within a serviceable air filter cartridge housing, featuring a radial seal arrangement and a secondary filter cartridge, which includes a drain aperture for water drainage, to enhance filtration efficiency and media pack stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a z-filter media pack is used in an air filter cartridge, then filtration efficiency is improved, but sealing integrity and media pack stability deteriorate
Solution Approach 1:
The patent employs flexible sealing elements including a flexible seal member that can be compressed between the media pack and housing, and a flexible diaphragm that seals against the media pack surface. These flexible sealing components conform to the media pack geometry and maintain reliable seals even with the flexible z-filter media construction, resolving the contradiction between filtration efficiency and sealing integrity.
Solution Approach 2:
The patent introduces intermediary sealing components such as a seal member with compression members and a diaphragm that act as mediators between the media pack and the housing. These intermediary elements transfer and distribute sealing forces evenly across the media pack interface, ensuring reliable sealing without compromising the media pack stability or filtration performance.
2Productivity
If a z-filter media pack configuration is used, then filtration efficiency is improved, but device complexity increases
Solution Approach 1:
The patent segments the sealing system into distinct functional components: a seal member with compression members for radial sealing, a diaphragm for surface sealing, and a housing structure. This segmentation allows each component to perform its specific sealing function independently, simplifying the overall design and assembly while maintaining effective sealing of the complex z-filter media pack configuration.
Solution Approach 2:
The seal member is designed with multi-functionality, serving both as a structural support element and as a sealing component. The compression members provide both mechanical support and sealing action. This multi-functionality reduces the number of separate parts needed, thereby reducing device complexity while maintaining filtration efficiency.
3Reliability
If a radial seal arrangement is added to seal the media pack, then sealing integrity is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The seal member and diaphragm are pre-positioned and pre-configured in the housing structure before the media pack is installed. The compression members are pre-loaded to provide immediate sealing action upon media pack insertion. This preliminary preparation simplifies the final assembly process and ensures consistent sealing performance without increasing manufacturing complexity.
Solution Approach 2:
The sealing system is designed to be self-adjusting and self-sealing. The compression members automatically apply the necessary sealing force as the media pack is inserted, and the diaphragm self-conforms to the media pack surface. This self-service capability eliminates the need for complex adjustment mechanisms or precise manual positioning, thereby simplifying assembly while maintaining sealing integrity.
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 configuration improves the filtration efficiency by ensuring effective sealing and water drainage, maintaining the integrity of the z-filter media and enhancing the overall performance of air cleaner assemblies.
Implementation Method 1
a radial seal arrangement molded-in-place as part of the first embodiment
Implementation Method 2
the shell closed end section includes a drain aperture arrangement therein, to allow for drainage of water from a downstream end of the filter cartridge
Implementation Method 3
Air streams can carry contaminant material therein. In many instances, it is desired to filter some or all of the contaminant material from the air stream
Data Source
AI summary
Air cleaner assemblies and components therefor are described. An example first or main filter cartridge is described which includes a media pack comprising fluted material secured to facing sheets. The media pack defines opposite inlet and outlet flow faces, with flutes extending in a direction therebetween. The cartridge defines a closed end, spaced from, but in overlap with, the outlet end face of the media pack.