Waved Filter Media for High Alpha Filtration
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Solution Overview
Problem
Current filtration media, such as those made from glass, nanofiber electrospun materials, and synthetic materials, face challenges in maintaining high alpha values, which indicate low pressure drop and high efficiency, especially when electrostatic charges are removed, leading to decreased filtration performance.
Innovation Solution
A filter media with a fine fiber filtration layer and a coarse support layer in a waved configuration, where the coarse support layer has varying fiber mass distribution and the fine fiber layer has a significantly increased surface area, is used to maintain peak and trough separation, enhancing filtration efficiency and dust holding capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrostatically charged synthetic filtration media are used, then initial alpha values are very high, but alpha values significantly decrease when electrostatic charge is removed
Solution Approach 1:
The patent changes the physical configuration parameter of the filtration media from planar to waved, increasing the surface area and creating a three-dimensional structure that maintains filtration efficiency without relying on electrostatic charge. This structural parameter change allows the media to achieve high alpha values through geometric configuration rather than electrostatic properties.
Solution Approach 2:
The patent employs composite material construction by combining fine fiber filtration layers with coarse support layers in a waved configuration. This composite structure integrates the high surface area benefits of fine fibers with the structural stability of coarse supports, maintaining reliable filtration performance over time without dependence on electrostatic charge.
2Reliability
If planar filter media configuration is used, then manufacturing is simple, but surface area is limited reducing filtration efficiency
Solution Approach 1:
The patent applies curvature by transforming the planar filtration media into a waved three-dimensional configuration. This curvature increases the effective surface area of the filtration layer without requiring a proportional increase in the media footprint, thereby enhancing filtration efficiency while maintaining a compact form factor.
Solution Approach 2:
The patent transitions from a two-dimensional planar configuration to a three-dimensional waved structure. This dimensional change allows the filtration media to utilize vertical space and create multiple peaks and troughs, significantly increasing the available surface area for particle capture within the same planar footprint.
3Reliability
If waved configuration with increased surface area is used, then filtration efficiency improves, but structural complexity increases requiring support layers
Solution Approach 1:
The patent segments the filtration media into distinct functional layers: fine fiber filtration layers for particle capture and coarse support layers for structural stability. This segmentation allows each layer to be optimized for its specific function, with the coarse layers providing the necessary support for the waved configuration without requiring complex internal frameworks.
Solution Approach 2:
The patent applies local quality by using different fiber types and configurations in different regions of the media. Fine fibers are concentrated in the filtration layers where particle capture is needed, while coarse fibers are used in support layers where structural integrity is required. This localized optimization achieves high filtration efficiency without uniformly increasing complexity throughout the entire media structure.
Data Source
AI summary
Various high performance, high efficiency filter media are provided that are cost effective and easy to manufacture. In particular, various filter media are provided having at least one layer with a waved configuration that results in an increased surface area, thereby enhancing various properties of the filter media. The filter media can be used to form a variety of filter elements for use in various applications.