Magnetic Fluidic Valve with Bi-Stable Low-Energy Actuation
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Solution Overview
Problem
Conventional fluidic valves, particularly in microfluidic systems, face challenges in forming reliable seals, are fragile, and require significant energy for actuation, making them difficult to manufacture and control at a small scale, and are often large and unsuitable for compact applications.
Innovation Solution
Magnetic fluidic valves that utilize a ferromagnetic gate transmission element moved between open and closed positions by magnetic forces, allowing for bi-stable operation without continuous electrical input, and can be integrated into compact designs suitable for microfluidic applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional fluidic valves are used in microfluidic systems, then fluid flow control is achieved, but seal reliability deteriorates and manufacturing difficulty increases
Solution Approach 1:
The patent replaces conventional mechanical valve components (seats, seals, moving parts) with a magnetic field-based control mechanism. A magnetic actuator moves a gate element within the fluidic path without requiring mechanical seals or contact-based closure mechanisms, thereby eliminating seal reliability issues and simplifying manufacturing.
Solution Approach 2:
The patent introduces a magnetic field as an intermediary to control fluid flow. Instead of direct mechanical contact between valve components, a magnetic field mediates the movement of the gate element, enabling reliable flow control without mechanical seals and reducing manufacturing complexity.
2Volume of moving object
If conventional fluidic valves are miniaturized for microfluidic applications, then system compactness is improved, but structural strength and reliability deteriorate
Solution Approach 1:
The patent replaces fragile mechanical components with a magnetic field-based actuation system. The gate element is moved by magnetic forces rather than mechanical actuators, eliminating the need for complex mechanical structures that would be difficult to maintain at micro-scale, thereby preserving structural strength while enabling miniaturization.
3Ease of operation
If conventional fluidic valves are actuated, then fluid flow control is achieved, but energy consumption increases
Solution Approach 1:
The patent employs bi-stable magnetic actuation where the valve maintains its state (open or closed) without continuous energy input. The magnetic actuator is activated periodically to switch between states, and the system remains stable in each state without requiring continuous power, thereby reducing overall energy consumption while maintaining ease of control.
4Area of stationary object
If conventional fluidic valves are designed for compact applications, then system integration is improved, but manufacturing complexity increases
Solution Approach 1:
The patent merges the actuator and valve body into an integrated structure where the magnetic actuator is positioned adjacent to the fluidic path within a single valve housing. This consolidation reduces the overall footprint while simplifying manufacturing by eliminating the need for separate mechanical linkages and alignment mechanisms that would increase complexity.
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 magnetic fluidic valves provide reliable and energy-efficient control of fluid flow, maintaining valve states without continuous electrical input, and can be integrated into small, compact systems, addressing the challenges of seal reliability and energy consumption in microfluidic systems.
Implementation Method 1
a permanent magnet positioned and configured to bias the gate transmission element to the closed position with a magnetic force
Implementation Method 2
an electromagnetic coil configured to, upon actuation, overcome the magnetic force acting on the gate transmission element from the permanent magnet
Data Source
AI summary
Magnetic fluidic valves of the present disclosure may include a valve body having at least one cavity therein, a ferromagnetic gate transmission element disposed within the cavity, an inlet port, an outlet port, a permanent magnet configured to bias the gate transmission element to a closed position, and an electromagnetic coil configured to, upon actuation, overcome a magnetic force acting on the gate transmission element from the permanent magnet. The gate transmission element may be configured to move from the closed position blocking the inlet port to an open position unblocking the inlet port upon actuation of the electromagnetic coil. Various other fluidic systems and methods are also disclosed.