Parallel Filter Elements With Bypass Flow After Clogging
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Solution Overview
Problem
Existing filters are poorly suited for robust and consistent performance across highly variable biological samples, often clogging rapidly or allowing small contaminants to pass through due to simplistic designs that are ineffective at capturing deformable, fibrous, and polydisperse debris particles.
Innovation Solution
Incorporating a bypass flow path into the filter design allows fluid flow to continue even if most or all filter elements become clogged, with the bypass channel having higher fluidic resistance than the filter elements, ensuring fluid preferentially passes through the filter elements until they become clogged, then switching to the bypass channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple filter design is used, then the device complexity is reduced, but the filtration performance deteriorates due to rapid clogging and inability to capture deformable, fibrous debris
Solution Approach 1:
The filter is divided into multiple independent filter elements arranged in parallel, where each element can be independently clogged. This segmentation ensures that if one element clogs, others remain functional, maintaining continuous filtration capability and improving reliability without significantly increasing overall device complexity
Solution Approach 2:
The filter elements are designed with specific parameters (pore size, surface area, material properties) optimized for capturing deformable and fibrous debris. By adjusting these parameters, the filter achieves high reliability in capturing diverse contaminants while maintaining a relatively simple overall structure
2Reliability
If the filter elements are made with high filtration capacity, then the filtration performance is improved, but the device reliability deteriorates due to rapid clogging
Solution Approach 1:
Multiple filter elements are arranged in parallel configuration, creating redundant filtration pathways. When debris accumulates and clogs one element, the system continues to function through remaining elements, extending the operational duration and maintaining reliability
Solution Approach 2:
The parallel filter element configuration ensures continuous filtration operation even when individual elements become clogged. The useful action of filtration never stops because alternative pathways remain open, maintaining both performance and operational duration
3Productivity
If the bypass channel has lower fluidic resistance, then the fluid flow is maintained when filter elements are clogged, but the filtration capacity is reduced due to preferential flow through the bypass
Solution Approach 1:
The fluidic resistance of the bypass channel is carefully controlled to be slightly higher than that of clean filter elements. This parameter optimization ensures that under normal conditions, flow preferentially passes through the filter elements for effective filtration. When elements clog, the resistance balance shifts to allow bypass flow, maintaining continuity while minimizing capacity loss
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 filter maintains functionality by allowing fluid to flow through the bypass channel when filter elements are clogged, preventing device failure and maximizing filtration capacity by ensuring all filter elements remain accessible, even when partially or fully clogged.
Implementation Method 1
a bypass pathway positioned to flow a fluid around the filter element
Implementation Method 2
flowing a fluid containing debris through the filter element such that at least some of the debris becomes entrapped in the filter element
Data Source
AI summary
In one aspect, the present disclosure generally relates to systems and methods for filtration. In some embodiments, filters are provided that include bypass channels, e.g., such that the filter is able to allow fluid flow to occur even if most or all of the filter elements are clogged. In some cases, the bypass channel may have a fluidic resistance that is higher than the filter elements, such that fluid preferentially passes through the filter elements. However, over time, as the filter elements become clogged with debris, the fluidic resistance of the filter elements may increase, e.g., such that it becomes greater than the bypass channel, and fluid may instead preferentially pass through the bypass channel. In contrast, in many prior art devices, once a filter has clogged, fluid can no longer flow through the filter.