Microfluidic Chip Vacuum Droplet Generation
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Solution Overview
Problem
Existing single cell gene sequencing platforms are complex, require multiple pumps for synchronized operation, and have unpredictable pressure and flow velocities, leading to inconsistent droplet formation and size uniformity.
Innovation Solution
A microfluidic chip system with a simplified design that uses a single power source to generate a vacuum, allowing for consistent flows of reagents and predictable droplet formation, while also incorporating a vibration device to reduce sedimentation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple pumps are used for generating flows and droplets, then droplet generation capability is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple pump functions into a single vacuum generation device. Instead of using three separate pumps to generate flows and droplets, the invention uses one vacuum device to create negative pressure that drives all fluid flows through the microfluidic chip, thereby reducing device complexity while maintaining droplet generation capability
Solution Approach 2:
The vacuum generation device performs multiple functions simultaneously: it generates negative pressure to drive continuous phase flow, dispersed phase flow, and reagent mixing, replacing what would traditionally require multiple specialized pumps. This multi-functional approach reduces the number of components needed
2Manufacturing precision
If multiple pumps operate synchronously, then flow consistency is improved, but ease of operation deteriorates
Solution Approach 1:
The vacuum generation device automatically regulates fluid flows through pressure equilibrium. The negative pressure created in the common chamber naturally balances the flow rates of continuous phase and dispersed phase without requiring complex synchronization control, making the system easier to operate while maintaining flow consistency
3Manufacturing precision
If pressure and flow velocities are made predictable, then droplet size uniformity is improved, but device complexity increases
Solution Approach 1:
The patent implements pressure feedback control where the vacuum device monitors and adjusts negative pressure to maintain consistent flow velocities. This feedback mechanism ensures predictable pressure and flow conditions for uniform droplet formation without adding significant complexity to the system
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 uniformity and predictability in droplet size and generation frequency, reducing sedimentation and ensuring homogeneous concentrations of cells and microbeads, while being compact and easy to operate.
Implementation Method 1
a power generation device (50) forming a vacuum
Implementation Method 2
at least one vibration device (25, 26) applying vibration
Data Source
AI summary
A microfluidic chip system for generating droplets is provided by the present disclosure. The microfluidic chip system includes a droplet generation device for generating the droplets, a power generation device for supplying power to the droplet generation device, a collection container for collecting the droplets flowing out of the droplet generation device, a connection device connecting the droplet generation device, the power generation device, and the collection container to each other, and a preparation platform holds together the droplet generation device, the power generation device, and the collection container. A method for preparing the droplets is also provided by the present disclosure.