Double-Filter Bypass Lumen for Clog-Resistant Fluidic Circuits
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Solution Overview
Problem
Fluidic circuit nozzle assemblies are prone to clogging due to contamination, leading to reduced effectiveness in creating and maintaining desired sprays, as conventional filters often fail to prevent clogging by large debris, resulting in incomplete or blocked fluid flow.
Innovation Solution
A multiple-fluidic circuit substrate with integrated filters and a bypass lumen that allows filtered fluid to flow directly or through an alternate path, ensuring continuous output even if one filter becomes clogged, by interconnecting multiple fluidic circuits downstream of the filters, enabling fluid to bypass a blocked path and maintain flow to all outlets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single filter is placed in the fluid path to prevent clogging, then particle removal is improved, but the filter can be substantially clogged by large debris, resulting in complete blockage
Solution Approach 1:
The fluid path is divided into multiple parallel circuits, each with its own filter. This segmentation ensures that if one filter becomes clogged, the other circuits remain operational, preventing complete system blockage while maintaining particle removal effectiveness.
Solution Approach 2:
The redundant filter circuits are designed in advance to compensate for potential filter clogging. The system includes backup filtering capacity that activates when the primary filter becomes blocked, providing beforehand protection against complete system failure.
2Reliability
If multiple filter circuits are implemented in parallel, then continuous flow is maintained when one filter clogs, but device complexity increases
Solution Approach 1:
The device is segmented into multiple identical or near-identical circuit modules, each containing a filter and associated fluidic components. This modular segmentation achieves redundancy while maintaining relatively simple individual unit designs that can be manufactured and assembled efficiently.
Solution Approach 2:
Each circuit module is designed to be universally functional, capable of independently performing the complete filtering and fluid delivery function. This universality allows any circuit to compensate for failures in others, achieving reliability without requiring complex specialized components.
3Reliability
If filter posts are spaced to allow alternative flow paths, then clogging resistance is improved, but filter effectiveness against small particles is reduced
Solution Approach 1:
The filtering function is segmented across multiple parallel circuits rather than relying on a single filter with large spacing. Each filter can maintain tight spacing for effective particle removal, while the circuit segmentation provides the clogging resistance that would be impossible in a single-filter design.
Solution Approach 2:
The system provides beforehand cushioning against clogging by having redundant circuits ready to take over if one filter becomes blocked. This allows each individual filter to be designed with optimal tight spacing for particle removal, knowing that system-level redundancy will protect against complete blockage.
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 solution ensures continuous and effective fluid spray output by allowing fluid to bypass a clogged filter through an alternate path, maintaining the desired spray pattern and preventing complete blockage, thus enhancing the reliability and efficiency of fluidic spray devices.
Implementation Method 1
the filter incorporating spaced filter posts 24... the filter and the fluid circuit define liquid flow paths with extra places or enlargements and spaced posts in which contaminants or loose particles will lodge or become trapped
Implementation Method 2
At least one integral inter-circuit bypass lumen is located in the substrate downstream of the filters to effectively provide a double filter for each oscillator chamber and its outlet. The filtered fluid in each circuit can either flow directly through its filter to its corresponding oscillator chamber and outlet aperture or through the lumen to the other oscillator chamber and outlet aperture
Data Source
AI summary
A multiple-fluidic circuit substrate structure with an integral inter-circuit bypass lumen effectively provides multiple parallel filtered fluid inlets having filtered fluid outlets with at least one inter-circuit pass-through channel in fluid communication between the filtered fluid outlets to automatically provide full flow of filtered fluid to each of a plurality of fluidic circuits or to two or more circuits even if one fluidic circuit's corresponding inlet fluid filter is clogged.