Magnetic Separation Device with Yoke Flux Concentration
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Solution Overview
Problem
Existing magnetic separation devices have limited magnetic field strength due to the remanent induction of the magnet materials used, which hinders efficient separation of magnetic substances in bio-samples.
Innovation Solution
A magnetic separation device comprising a magnetic field unit with a magnetic yoke and multiple magnets, where the same magnetic poles face the yoke, and a separation unit with non-magnetic piping sections arranged perpendicular and parallel to the yoke, enhancing the magnetic flux density beyond the remanent flux density of the magnets, allowing for stronger magnetic fields for effective separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If conventional magnets with remanent induction are used in the magnetic separation device, then the device structure is simple, but the magnetic field strength is insufficient to achieve efficient separation of magnetic substances in bio-samples
Solution Approach 1:
The magnetic separation device is segmented into multiple independent magnetic field units, each comprising a magnetic yoke with multiple magnets arranged in specific patterns. This segmentation allows each unit to generate focused high-strength magnetic fields while maintaining overall structural modularity and simplicity.
Solution Approach 2:
A magnetic yoke made of high-permeability magnetic material is introduced as an intermediary between the magnets and the bio-sample solution. The magnetic yoke concentrates and guides magnetic flux, significantly enhancing the magnetic field strength at the separation interface without requiring more powerful magnets.
2Productivity
If the magnetic field strength is increased beyond the remanent induction limit of conventional magnets, then the separation efficiency improves, but the device complexity increases due to additional magnetic components
Solution Approach 1:
The invention changes the magnetic permeability parameter by introducing a magnetic yoke made of high-permeability material. This parameter change allows the system to achieve magnetic field strengths exceeding the remanent induction of the magnets themselves, thereby improving separation efficiency without adding more magnets.
Solution Approach 2:
The magnetic field unit employs a composite structure combining permanent magnets with soft magnetic yoke material. This composite design leverages the high remanent induction of the magnets together with the flux-conducting properties of the magnetic yoke to generate enhanced magnetic fields.
3Force
If multiple magnets are arranged with same poles facing the magnetic yoke, then the magnetic flux density is enhanced beyond remanent flux density, but the manufacturing complexity increases
Solution Approach 1:
The magnetic field unit is segmented into modular components with magnets arranged in repeating patterns on opposite surfaces of the magnetic yoke. This segmentation simplifies manufacturing by allowing standardized magnet assemblies to be produced and assembled systematically.
Solution Approach 2:
The magnets are arranged with same magnetic poles (e.g., all north poles or all south poles) facing the magnetic yoke surface, creating an asymmetric configuration that maximizes magnetic flux density at the yoke interface. This asymmetric arrangement is achieved through standardized positioning fixtures during assembly.
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 enhanced magnetic field strength significantly improves the separation efficiency of magnetic substances, achieving high separation efficiencies of up to 99.88% as demonstrated in tests with various bio-samples.
Implementation Method 1
a first magnetic field unit, and a first separation unit disposed at the side of the first magnetic field unit. The first magnetic field unit comprises a first magnetic yoke having opposite first and second surfaces, and a plurality of first magnets respectively disposed over the first and second surfaces
Implementation Method 2
the magnetic bio-substances or bio-substances labeled by the magnetic target are attracted or repelled toward a sidewall of one of the second sections
Data Source
AI summary
A magnetic separation device is provided, including a first magnetic field unit and a first separation unit disposed at a side of the first magnetic field unit. The first magnetic field unit includes a first magnetic yoke having opposite first and second surfaces, and a plurality of first magnets respectively disposed over the first and second surfaces, wherein the same magnetic poles of the plurality of first magnets face the first magnetic yoke. The first separation unit includes a body made of non-magnetic materials and a continuous piping disposed in the body, including at least one first section and at least one second section, wherein at least one second section is perpendicular to at least one first section, and at least one second section is adjacent to, and in parallel to a side of the first magnetic yoke not in contact with the plurality of first magnets.