Magnetic Particle Filtration Separator for Low-Loss Liquid Separation

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Solution Overview

Problem

Existing methods for separating magnetic particles often result in the discharge of unadsorbed particles along with foreign substances, necessitating more time and inefficiency.

Innovation Solution

A filtration separator and method utilizing a storage tank with a stirring mechanism, magnet mechanism, and filtration mechanism to adsorb and separate magnetic particles efficiently, including a rotating shaft, stirring impeller, and filter, allowing for magnetic force control and efficient separation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of substance

If magnetic particles are separated by adsorption to a magnet, then foreign substances can be removed, but unadsorbed magnetic particles are discharged together with foreign substances causing loss

Engineering Contradiction:
Improvemagnetic particles lossVSAvoidseparation efficiency
Core Design Contradiction:
Loss of substanceVSProductivity

Solution Approach 1:

The separation process is divided into multiple stages: first adsorption to magnet for foreign substance removal, then filtration through filter for unadsorbed magnetic particle recovery, and finally collection of purified magnetic particles. This segmentation ensures no magnetic particles are lost while maintaining high separation efficiency.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

A filter is introduced as an intermediary component between the magnet and the discharge port. The filter captures unadsorbed magnetic particles that would otherwise be discharged with foreign substances, preventing material loss while maintaining efficient separation.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Loss of time

If magnetic particles are separated by adsorption to a magnet, then foreign substances can be removed, but the separation process takes too much time

Engineering Contradiction:
Improveseparation timeVSAvoidmagnetic particles loss
Core Design Contradiction:
Loss of timeVSLoss of substance

Solution Approach 1:

The filter is pre-positioned in the discharge path before magnetic particle separation begins. This preliminary arrangement allows unadsorbed particles to be captured immediately during the adsorption process, eliminating the need for additional recovery steps and reducing total separation time while preventing particle loss.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The filtration action occurs continuously throughout the magnetic adsorption process rather than as a separate step. Unadsorbed magnetic particles are captured in real-time as they pass through the filter, maintaining continuous separation action that reduces total process time while ensuring no particles are lost.

Inventive Principle:
Principle #20Continuity of useful action

3Loss of substance

If a filter is added to recover unadsorbed magnetic particles, then particle loss is reduced, but device complexity increases

Engineering Contradiction:
Improvemagnetic particles lossVSAvoidseparation device structure
Core Design Contradiction:
Loss of substanceVSDevice complexity

Solution Approach 1:

The filter is integrated with the existing magnet structure, combining the adsorption and filtration functions into a unified device. This merging approach reduces overall device complexity compared to having separate magnet and filter systems, while still achieving complete magnetic particle recovery.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The filter structure serves multiple functions: it captures unadsorbed magnetic particles, allows liquid discharge, and can be integrated with the magnet assembly. This multi-functionality reduces the need for additional components, simplifying the overall device structure while preventing particle loss.

Inventive Principle:
Principle #6Universality (Multi-functionality)

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 rapid and efficient separation of magnetic particles from reaction liquids with minimal loss, facilitating quick collection and washing with reduced material waste.

Implementation Method 1

a magnet mechanism that is provided in at least a part of the side wall portion, and that can switch a magnetic force in the storage tank between an on state and an off state, and that adsorb the magnetic particles in the liquid to the side wall portion when it is in the on state

Methodology Applied
Scientific EffectMagnetic force: Magnetism

Implementation Method 2

a stirring mechanism having a rotating shaft portion inserted into the storage tank in a direction crossing a face of the bottom portion, and a stirring impeller that is coupled to the rotating shaft portion and that stirs the liquid by rotation of the rotating shaft portion

Methodology Applied
Scientific EffectMechanical stirring: Stirring

Implementation Method 3

a filtration mechanism having a filter provided in the bottom portion of the storage tank, and a discharge port from which the liquid after passing through the filter is discharged

Methodology Applied
Scientific EffectFiltration: Filter (physical)

Data Source

PatentUS12605718B2Filtration separator for magnetic particles and filtration separation method for magnetic particles
Publication Date: 2026.04.21 SEIKO EPSON CORP
  • US12605718B2 patent drawing
  • US12605718B2 patent drawing
  • US12605718B2 patent drawing

AI summary

A filtration separator for magnetic particles includes a storage tank that stores a liquid in which magnetic particles are dispersed, and that has a bottom portion and a side wall portion, a stirring mechanism having a rotating shaft portion inserted into the storage tank in a direction crossing a face of the bottom portion, and a stirring impeller that is coupled to the rotating shaft portion and that stirs the liquid by rotation of the rotating shaft portion, a magnet mechanism that is provided in at least a part of the side wall portion, and that can switch a magnetic force in the storage tank between an on state and an off state, and that adsorb the magnetic particles in the liquid to the side wall portion when it is in the on state, and a filtration mechanism having a filter provided in the bottom portion of the storage tank, and a discharge port from which the liquid after passing through the filter is discharged.