Compact Valve Array with Electro-Pneumatic Actuation
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Solution Overview
Problem
The assembly of serial valve banks with tubing and fittings in disposable kits for chemical processing is challenging due to complex structures and high costs, limiting flexibility in fluid routing and increasing dead-volumes, especially in applications requiring precise control and low contamination.
Innovation Solution
A disposable, miniature fluidic binary switch array with a reusable electro-pneumatic actuator array and a damping layer, integrated into a monolithic chip, allowing for fast and compact fluid control with reduced dead-volumes and improved reliability, and enabling easy replacement without tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If serial valve banks with tubing and fittings are used in disposable kits, then fluid control functionality is achieved, but assembly complexity increases and manufacturing cost rises
Solution Approach 1:
The patent merges multiple separate components (valves, tubing, fittings) into a single integrated disposable cartridge. The valve banks are directly mounted on the cartridge body with fluid pathways formed as integral features, eliminating the need for separate tubing and fitting assemblies. This integration dramatically simplifies assembly while maintaining full fluid control functionality.
Solution Approach 2:
The system is segmented into two distinct parts: a reusable actuator assembly and a disposable cartridge. This segmentation allows the complex valve bank assembly to be pre-manufactured and tested as a complete disposable unit, which is then simply inserted into the reusable actuator. The segmentation transfers assembly complexity to the disposable manufacturing process while simplifying system-level assembly.
2Device complexity
If serial valve banks are used to reduce part count, then number of individual parts decreases, but flexibility in fluid routing is limited
Solution Approach 1:
The patent transitions from traditional serial linear valve arrangements to a two-dimensional array of valves on the disposable cartridge face. This dimensional change allows multiple fluid pathways to be accessed simultaneously through different valve locations, enabling complex routing patterns without increasing the number of valves. The 2D layout provides spatial flexibility that overcomes the limitations of serial connections.
Solution Approach 2:
Each valve in the array is designed with universal functionality, where any valve can potentially route fluid to multiple destinations depending on the configuration. The integrated manifold design allows a single valve to control flow to different chambers or outlets based on cartridge orientation and internal pathway design, increasing routing flexibility without requiring dedicated valves for each pathway.
3Ease of operation
If traditional valve assemblies with tubing are used, then components can be assembled by hand, but dead-volumes increase and automation becomes prohibitively expensive
Solution Approach 1:
The elimination of separate tubing components and direct integration of fluid pathways into the cartridge body removes the bends, joints, and connection points that create dead-volumes. Fluid flows through continuous integrated channels from reservoir to valve to outlet, minimizing stagnant fluid regions. The compact internal layout further reduces the overall volume of fluid pathways.
Solution Approach 2:
The patent changes the geometric parameters of fluid pathways by forming them as integral features of the molded cartridge rather than assembling separate tubing sections. This allows optimization of channel dimensions, angles, and lengths to minimize dead-volume while maintaining manufacturability through standard injection molding processes. The continuous pathways enable smoother flow transitions with fewer sharp angles and dead ends.
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 system achieves high valve density, fast switching, and extended lifespan of disposable components, reducing cross-contamination and dead-volumes, while simplifying assembly and maintenance, and is scalable for various fluidic processes.
Implementation Method 1
reusable electro-pneumatic actuator array
Implementation Method 2
damping layer
Data Source
AI summary
Described herein is a system for on-demand synthesis/analysis of compounds and/or diagnostic applications. In general, any application that requires a low-cost binary switch valve array for fast (<100 ms) switching of gases or liquids, in a spatially compact format, is compatible with the system described herein.