Disposable Resin Magnetic Mixer for Stronger Impeller Coupling
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Solution Overview
Problem
Existing magnetic mixers using metal tanks face issues with cross-contamination due to unwashed residues, reduced magnetic coupling force, and impeller separation during high-speed rotation, especially when using disposable resin materials.
Innovation Solution
A magnetic mixer and mixing system utilizing a disposable resin liquid pouch with a flexible resin material, incorporating a rotor with permanent magnets in a circumferential direction, a bonding plate, and an impeller with alternating magnetic poles, enhanced by high permeable magnetic members, and a bearing support structure to prevent separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal tank is used for mixing liquids, then the mixing system can be reused multiple times, but cross-contamination occurs due to unwashed residues
Solution Approach 1:
The patent employs disposable resin liquid pouches instead of reusable metal tanks. Each pouch is used once for mixing and then discarded, eliminating the need for washing and sterilization processes. This resolves the contradiction by preventing cross-contamination through single-use containers while maintaining production efficiency since no time is lost to cleaning operations.
2Reliability
If a resin impeller is used in a disposable liquid pouch, then cross-contamination is minimized, but magnetic coupling force between rotor and impeller is reduced
Solution Approach 1:
The patent uses composite material construction for the impeller, combining resin material with embedded permanent magnets. This allows the impeller to maintain the chemical inertness and disposability of resin while incorporating magnetic properties necessary for strong magnetic coupling with the rotor, thus resolving the contradiction between contamination prevention and magnetic force transmission.
Solution Approach 2:
The patent optimizes the magnetic properties of the impeller by carefully selecting and positioning permanent magnets within the resin matrix. By changing the magnetic parameters (strength, distribution, orientation) of the embedded magnets, sufficient magnetic coupling force is achieved while maintaining the resin impeller's advantage of preventing cross-contamination.
3Adaptability or versatility
If the impeller is formed of resin material, then it is compatible with disposable liquid pouches, but the impeller is likely to separate during high-speed rotation
Solution Approach 1:
The patent addresses impeller separation by introducing a magnetic dimension to the problem. Instead of relying solely on mechanical attachment of the resin impeller to the rotor, magnetic forces in the axial dimension are utilized to hold the impeller firmly against the rotor during high-speed rotation, preventing separation while maintaining compatibility with disposable pouches.
4Force
If the area of the impeller and number of magnets are increased to solve magnetic coupling force reduction, then magnetic coupling improves, but the area of opening for installation and bonding area increase
Solution Approach 1:
The patent applies local quality by concentrating magnetic strength where most needed. Instead of uniformly increasing impeller area and magnet count, the design optimizes the local magnetic properties and distribution of magnets in critical coupling zones, achieving sufficient magnetic force with minimal increase in overall impeller size and bonding area requirements.
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
Minimizes cross-contamination, enhances magnetic coupling force, and prevents impeller separation, ensuring efficient and reliable mixing in pharmaceutical and biological applications while reducing costs and equipment maintenance.
Implementation Method 1
increase a magnetic coupling force between rotors for driving an impeller inside the liquid pouch and an impeller outside the liquid pouch by a magnetic coupling method
Data Source
AI summary
The present invention relates to a magnetic mixer to which a disposable resin liquid pouch is applied instead of a metal tank, for accommodating and mixing liquids therein, to minimize cross-contamination of liquids to be mixed due to an unwashed residue, increase a magnetic coupling force between rotors for driving an impeller inside the liquid pouch and an impeller outside the liquid pouch by a magnetic coupling method, and prevent separation of the impeller in liquids to be mixed, and a magnetic mixing system.