Gas Filter Sealing Structure for Dual-Element Filtration
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Solution Overview
Problem
Existing gas filter systems face challenges in achieving effective sealing between the housing and multiple filter elements, particularly when using two filter elements for particle filtration and gas adsorption/absorption, which can lead to leaks and reduced filtration efficiency.
Innovation Solution
A gas filter system design featuring a housing with a sealing projection and housing groove, where the outer and inner filter elements have end caps with projections that form a common groove, allowing for sealing abutment against the housing and enhancing the sealing effect, with the use of polyurethane foam for improved sealing surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two filter elements are used in a common housing for particle filtration and gas adsorption, then filtration functionality is improved, but sealing reliability deteriorates due to increased complexity of sealing between housing and multiple filter elements
Solution Approach 1:
The patent merges the sealing functions by integrating sealing projections directly into the end caps of the filter elements, eliminating separate sealing components. The first end cap of the outer filter element and the third end cap of the inner filter element both incorporate sealing projections that engage with the housing groove, creating a unified sealing system that handles both particle filtration and gas adsorption functions simultaneously
Solution Approach 2:
The patent employs a nested configuration where the inner filter element is placed inside the outer filter element, both within the housing. The sealing projections are nested within the housing groove structure, with the first sealing projection receiving the second sealing projection, creating a multi-layer sealing arrangement that ensures reliable sealing across multiple filter elements
2Reliability
If end cap projections form a common groove with sealing projection for sealing abutment, then sealing effectiveness is improved, but device complexity increases due to additional sealing structures
Solution Approach 1:
The patent combines multiple sealing functions into integrated sealing projections that are part of the end cap structure. The first end cap projection and second end cap projection form a common groove that receives the sealing projection, eliminating the need for separate sealing rings or gaskets and reducing overall structural complexity while maintaining effective sealing
Solution Approach 2:
The sealing projections are strategically positioned at specific locations on the end caps where sealing is most critical. The first sealing projection is positioned on the first end cap and the second sealing projection on the third end cap, creating localized sealing zones that prevent gas and particle leakage without requiring sealing structures throughout the entire filter element
Data Source
AI summary
A gas filter system including a housing with a sealing projection and a housing groove; an outer filter element having a first filter medium with a first end cap and a second end cap; and an inner filter element having a second filter medium with a third end cap and a fourth end cap, wherein the first end cap has a first axial end cap projection and the third end cap has a second axial end cap projection, the end cap projections being arranged in the housing groove; the first and second end cap projections forming a common groove into which the sealing projection protrudes for sealing abutment against the first end cap and the third end cap at the common groove. The use of an outer filter element and/or an inner filter element in the gas filter system.