Magnetic Valve Plug for Reversible Microfluidics Integration
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Solution Overview
Problem
Existing large-scale integrated microfluidics systems cannot cost-effectively integrate active components like valves or pumps into substrates, leading to passive systems that require external peripheral devices for operation, with non-reversible integration resulting in system failure if a valve malfunctions.
Innovation Solution
An active fluid component with a magnetically connected interface allows for reversible attachment to a substrate, using ring magnets or cubic magnets for secure fluid-tight connections, and includes a seal and actuator configuration for reliable operation, enabling the integration of active components like pumps or valves within the substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If active components are integrated into the substrate manufacturing process, then manufacturing cost and integration efficiency improve, but manufacturing complexity and process difficulty worsen
Solution Approach 1:
The system is divided into two separate parts: a passive substrate manufactured by injection-molding or hot-stamping, and an active fluid component manufactured separately and then connected to the substrate. This segmentation allows each part to be optimized for its specific manufacturing requirements, avoiding the need to integrate complex active components into the substrate manufacturing process itself.
Solution Approach 2:
A magnet is introduced as an intermediary element to connect the active fluid component to the substrate. The magnet serves as a bridging element that enables reversible magnetic connection between the two parts, allowing for easy assembly and disassembly without complex integration processes.
2Reliability
If active components are permanently integrated into the substrate, then system reliability improves, but adaptability and reusability worsen
Solution Approach 1:
The connection between the active fluid component and substrate is made dynamic and reversible through magnetic attraction. The fluid component can be attached to and detached from the substrate multiple times, allowing the system to adapt to different operational requirements while maintaining a reliable connection during use.
Solution Approach 2:
The substrate can be disposed of after use while the active fluid component is recovered and reused with a new substrate. This approach allows the expensive active components to be preserved and reused, while the disposable substrate is replaced, optimizing both reliability and reusability.
3Device complexity
If peripheral devices are used to operate passive substrates, then system simplicity improves, but device size and cost worsen
Solution Approach 1:
The active fluid component combines multiple functions (pumping, valve operation, fluid handling) into a single integrated unit that can be directly attached to the substrate. This eliminates the need for separate peripheral devices, reducing overall system size and complexity while maintaining full operational capability.
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
Enables the cost-effective integration of active components like switching valves or pumps into microfluidics substrates, allowing for detachable and reusable fluid components that maintain system functionality and prevent cross-contamination, while ensuring reliable fluid handling and efficient analysis.
Implementation Method 1
the magnet is provided which generates sufficiently high magnetostatic attractive forces by means of which a fluid-tight connection can be realized for the desired application cases
Data Source
AI summary
An active fluid component (40) for connection with a substrate (10) has an interface which can be connected with the substrate (10) in a fluid-tight manner, and a magnet (42) arranged in the region of the interface.