Microfluidic Pump Loops for Long-Distance Fluid Transport
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Solution Overview
Problem
Existing microfluidic systems face challenges in efficiently transporting fluids over long distances without requiring complex designs or external pumps, as they often rely on differential pressure which can be inefficient and cumbersome.
Innovation Solution
The implementation of microfluidic devices with pump loops and actuators that induce a traveling wave, allowing fluid to flow through the system by creating pressure through heat or piezoelectric means, eliminating the need for external pumps and complex designs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If differential pressure is used to transport fluid through microfluidic channels, then fluid flow is achieved, but the system becomes complex and requires external pumps
Solution Approach 1:
The patent extracts the pumping function from external components and integrates it directly into the microfluidic channel structure itself. The channel walls incorporate active elements that can generate pressure differentials locally, eliminating the need for separate external pumps and reducing overall system complexity while maintaining fluid transport capability.
Solution Approach 2:
The microfluidic channel is designed to be self-powered, with the channel structure itself containing the means to generate the pressure differential required for fluid flow. The channel walls include embedded actuators or energy-converting materials that enable the channel to pump fluid without external assistance, making the system self-sufficient.
2Productivity
If external pumps are used to transport fluid over long distances, then fluid flow is maintained, but the design becomes cumbersome and complex
Solution Approach 1:
The patent merges the fluid transport function with the channel structure by integrating active pumping elements directly into the channel walls. This combination allows the channel to perform both its structural function of guiding fluid and its active function of propelling fluid over long distances, eliminating the need for separate external pumping systems.
Solution Approach 2:
The microfluidic channel is designed with multi-functionality, serving both as the conduit for fluid flow and as the pumping mechanism. The channel walls incorporate materials or structures that can convert external energy inputs into pressure differentials, enabling the channel to perform multiple functions simultaneously and reduce overall system complexity.
3Ease of operation
If complex designs are implemented to achieve fluid transport, then fluid flow control is improved, but the system requires more components and becomes harder to manufacture
Solution Approach 1:
The patent segments the channel into multiple sections, each with locally integrated active elements that can independently control fluid flow in their respective regions. This segmentation allows for simplified manufacturing of modular components that can be assembled together, reducing overall manufacturing complexity while maintaining precise fluid flow control capabilities.
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
This method enables efficient and simple fluid transport over long distances within microfluidic channels, ensuring reliable operation and reducing the complexity of the system, while maintaining fluid flow without the need for external pressure sources.
Implementation Method 1
activation of the actuators may induce an analogue of a traveling wave that is to cause the fluid to flow through the transport channel and the pump loops from one direction to another direction
Implementation Method 2
creating pressure through heat or piezoelectric means
Implementation Method 3
creating pressure through heat or piezoelectric means
Data Source
AI summary
According to an example, a microfluidic device may include a transport channel having an inlet and an outlet and a plurality of pump loops extending along the transport channel. Each of the plurality of pump loops may include a first branch, a second branch, and a connecting section connecting the first branch and the second branch. The first branch may include a first opening and the second branch may include a second opening, in which the first opening and the second opening are in direct fluid communication with the transport channel. The pump loops may also each include an actuator positioned in the first branch, in which the actuators in the pump loops are to be activated to induce a traveling wave that is to transport the fluid through the transport channel from the inlet to the outlet.