Hourglass Plenum Filter for Particulate Redistribution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional filters experience a decline in efficiency as they fill with particulate material, leading to a need for a solution that extends the useful life of filtration systems.
Innovation Solution
The design incorporates a filter assembly with a back wall and sidewalls comprising filter media, featuring a unique hourglass-shaped inner plenum with a larger upstream aperture and smaller downstream aperture, which redirects flow and maintains filtration efficiency by redistributing particulate accumulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single surface filter is used, then the filter structure is simple, but the filtration efficiency declines rapidly as particulate accumulates
Solution Approach 1:
The filter surface is segmented into multiple regions with different aperture sizes. The upstream portion has larger apertures while the downstream portion has smaller apertures, allowing different zones to serve different functions in the filtration process and extend overall filter life
Solution Approach 2:
Different portions of the filter media are given different local properties through varying aperture sizes. The upstream area with larger apertures handles initial particulate loading, while the downstream area with smaller apertures provides finer filtration, optimizing performance across the entire filter surface
2Ease of manufacture
If the filter aperture size is uniform, then the manufacturing is simple, but the flow distribution becomes uneven as particulate accumulates
Solution Approach 1:
The filter aperture distribution is made asymmetric with respect to flow direction, with larger apertures upstream and smaller apertures downstream. This asymmetric configuration optimizes flow distribution as particulate accumulates, preventing channeling and maintaining productive filtration across the entire surface
3Productivity
If the filter operates until complete clogging, then the utilization of filter media is maximized, but the operational life is limited by efficiency decline
Solution Approach 1:
The filter maintains continuous useful action by ensuring that as particulate accumulates in upstream regions with larger apertures, the flow automatically redirects to downstream regions with smaller apertures that remain less clogged. This continues until the entire filter surface is utilized, maximizing operational life while maintaining filtration efficiency
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 enhances the filtration efficiency by maintaining flow and redirecting air through less clogged areas, prolonging the filter's operational life and maintaining effective particulate removal.
Implementation Method 1
filters have been fabricated to provide a single surface that facilitates filtration
Data Source
AI summary
A filter includes filter media and defines an inner plenum. The inner plenum has a cross-sectional dimension extending crosswise of the filter. The cross-sectional dimension decreases from adjacent the upstream side toward to downstream wall to a location disposed intermediate the upstream side and the downstream wall. The cross-sectional dimension of the inner plenum increases from adjacent the intermediate location toward the downstream wall.