Concentric Round Filter Element for Durable Gas Filtration
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Solution Overview
Problem
Existing circular filter elements for fuel cells do not maintain high filtration performance over a long operating period due to design limitations.
Innovation Solution
A circular filter element with a particle filter medium body and a pollutant filter medium body arranged concentrically, featuring a radial flow design, pleated activated carbon filter medium, and a gas-permeable support element with integrated end plates and sealing mechanisms to ensure stability and reduce friction, enhancing filtration efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a radial seal is used in a flat filter element, then sealing effectiveness is improved, but the risk of damaging the diaphragm structure increases due to radial stress concentration
Solution Approach 1:
The patent transitions from a radial seal (circular pattern) to an arc-shaped seal that follows the curved diaphragm surface. This arc-shaped seal distributes stress along a curved path rather than concentrating it radially, preventing diaphragm damage while maintaining sealing effectiveness. The seal element is positioned to contact the diaphragm along an arc rather than a radial line, fundamentally changing the stress distribution pattern.
2Reliability
If the filter element structure is made more complex to improve sealing, then sealing reliability is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The filter element is divided into distinct functional components: a support structure (cage), a diaphragm layer, and a separate seal element. This segmentation allows each component to be manufactured independently using standard processes, then assembled together. The seal element is a separate component that can be produced using conventional sealing element manufacturing techniques, avoiding the need for complex integrated sealing structures.
Solution Approach 2:
The seal element acts as an intermediary component between the support structure and the diaphragm. Rather than integrating sealing directly into the diaphragm or support structure (which would increase complexity), the separate seal element mediates the sealing function. This intermediary approach simplifies manufacturing of each individual component while achieving reliable sealing through their coordinated assembly.
3Reliability
If a larger seal contact area is used to improve sealing, then sealing effectiveness is improved, but the risk of diaphragm damage increases due to increased stress area
Solution Approach 1:
The arc-shaped seal concentrates the sealing function at a specific location along the diaphragm's curvature rather than distributing pressure uniformly across a large area. The seal element is positioned to contact the diaphragm at a localized arc region, providing effective sealing at that specific location without subjecting the entire diaphragm surface to high stress. This localized sealing approach maintains sealing effectiveness while minimizing overall diaphragm stress exposure.
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
The design ensures high filtration performance and longevity by minimizing friction and maintaining the structural integrity of the filter elements, effectively separating particles and pollutants from the gaseous fluid.
Implementation Method 1
the seal element (30) having a contact surface (31) configured to press against a diaphragm structure of the filtering element (10)
Data Source
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AI summary
A round filter element for the filtration of gaseous fluid comprises a particle filter medium body designed as a hollow body, and a separate noxious gas filter medium body designed as a hollow body, wherein the filter medium bodies are arranged concentrically with respect to one another and enclose an inner flow chamber. The end sides of the two filter medium bodies are covered in a flow-tight manner by a common end plate. A supporting element, in particular a supporting mesh, on the wall side of a filter medium body is connected fixedly to at least one end plate.