Cascading Droplet Ejectors for Multi-Stage Fluid Processing
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Solution Overview
Problem
Conventional droplet ejectors are limited to final stages of fluid delivery and lack versatility in initial and intermediate stages, restricting their application in complex fluid processing and multi-stage fluid delivery processes.
Innovation Solution
A multi-stage or cascading arrangement of droplet ejectors and target media is implemented, where droplet ejectors can deliver fluids to subsequent stages, enabling complex processes like PCR and color printing, with funnels guiding and collecting droplets for efficient fluid flow and processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional droplet ejectors are used only in final stages of fluid delivery, then the device structure remains simple, but the application versatility and processing capability are limited
Solution Approach 1:
The fluid delivery system is divided into multiple stages, with each stage containing its own droplet ejector and target media. This segmentation allows each stage to perform specific functions (e.g., initial mixing, intermediate reaction, final delivery) while maintaining overall system versatility without requiring a single complex ejector design
Solution Approach 2:
Multiple droplet ejectors and target media are arranged in a nested or cascading configuration where the output of one stage becomes the input for the next stage. This nesting approach enables complex multi-stage processing while keeping each individual stage relatively simple, thus improving versatility without proportionally increasing overall device complexity
2Productivity
If multi-stage droplet ejection is implemented, then fluid processing capability and application range are enhanced, but the device complexity and structural requirements increase
Solution Approach 1:
The multi-stage system is segmented into discrete functional units (droplet ejectors and target media pairs) that can be independently designed and optimized. Each stage handles a specific processing task, enabling high productivity through parallel or sequential operation while maintaining manageable structural complexity at each stage
Solution Approach 2:
The patent extends the traditional single-stage droplet ejection into multiple temporal and spatial dimensions by arranging ejectors and target media in sequences or cascades. This dimensional extension enables complex fluid processing (mixing, reacting, delivering) without requiring each individual component to be overly complex, thus improving productivity while controlling structural requirements
3Adaptability or versatility
If droplet ejectors deliver fluids through multiple stages, then the flexibility of reagent delivery is improved, but the fluid flow control and droplet collection requirements become more complex
Solution Approach 1:
Target media serve as intermediary elements between consecutive droplet ejectors, receiving droplets from one ejector, processing the fluid (mixing, reacting), and transferring the result to the next ejector. This intermediary approach enables flexible reagent delivery across multiple stages while simplifying fluid flow control at each individual stage, as each ejector only needs to interact with its immediate target media
Data Source
AI summary
An example device includes a first droplet ejector including a first nozzle to eject droplets of a first fluid, and a first target medium positioned relative to the first droplet ejector to receive the droplets of the first fluid from the first droplet ejector. The example device further includes a second droplet ejector in fluid communication with the first target medium to receive a second fluid from the first target medium. The second droplet ejector includes a second nozzle to eject droplets of the second fluid.