Magnetic refrigeration device
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Solution Overview
Problem
The radial air gap size of existing magnetic refrigeration devices is limited, leading to a smaller accommodating volume for the magnetic working medium, which results in lower refrigeration or heating performance.
Innovation Solution
A magnetic refrigeration device with a first assembly and a second assembly, where the first assembly is located on the radial outer or inner side of the second assembly, and the magnetic lines of force are distributed in a circumferential direction, forming a closed loop, enhancing the air gap volume and magnetic field strength through multi-layer magnetic circuits and the use of soft magnets for better magnetic shielding and guidance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of stationary object
If the radial air gap size is increased to accommodate more magnetic working medium, then the refrigeration or heating performance is improved, but the magnetic field strength and uniformity deteriorate
Solution Approach 1:
The patent transitions from a single-layer radial magnetic circuit to a multi-layer magnetic circuit structure. The magnetic field is distributed across multiple layers in the radial direction, allowing the air gap volume to be increased while maintaining magnetic field strength through the layered configuration. Each layer contributes to the overall magnetic field while accommodating more magnetic working medium in the expanded air gap space.
Solution Approach 2:
The patent employs nested magnetic circuits where inner and outer magnetic circuits are arranged concentrically. The inner magnetic circuit is positioned within the outer magnetic circuit, creating a nested configuration. This nested structure allows the magnetic field to be distributed across multiple concentric layers, increasing the effective air gap volume while maintaining field strength through the combined effect of nested magnetic paths.
2Volume of stationary object
If the radial air gap size is increased to accommodate more magnetic working medium, then the refrigeration or heating performance is improved, but the magnetic field uniformity deteriorates
Solution Approach 1:
By introducing multiple layers in the radial direction, the patent creates a multi-dimensional magnetic field distribution. The magnetic field is no longer confined to a single radial plane but is distributed across multiple layers, which helps maintain uniformity while expanding the total air gap volume. Each layer contributes to a more distributed and uniform magnetic field throughout the expanded space.
Solution Approach 2:
The patent applies different magnetic properties to different regions through the use of soft magnetic materials in specific locations within the magnetic circuit. The soft magnetic materials are strategically positioned to guide and distribute the magnetic field locally, ensuring uniform field distribution across the expanded air gap volume while allowing different regions to have optimized magnetic characteristics.
3Stability of the object's composition
If soft magnetic materials are added to improve magnetic shielding and guidance, then the magnetic field distribution is improved, but the device complexity increases
Solution Approach 1:
The patent integrates soft magnetic materials directly into the existing magnetic circuit structure, merging the shielding and guidance functions with the primary magnetic path. Rather than adding separate shielding components, the soft magnetic materials are incorporated as integral parts of the magnetic circuit layers, achieving improved field distribution without proportionally increasing structural complexity.
Solution Approach 2:
The soft magnetic materials serve multiple functions simultaneously: they provide magnetic shielding, guide magnetic flux, and contribute to the overall magnetic circuit structure. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity while achieving improved magnetic field distribution through the combined effects of shielding and guidance.
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 device improves refrigeration or heating performance by increasing the air gap accommodating volume and magnetic field strength, achieving higher frequency magnetization and demagnetization of the magnetic working medium, and ensuring uniform magnetic field distribution.
Implementation Method 1
the first assembly is a first magnet assembly, the second assembly is provided with an air gap space capable of accommodating a magnetic working medium bed, the first assembly is configured to rotate relative to the second assembly, and directions of a magnetic line of force of the first magnet assembly are distributed in a circumferential direction
Implementation Method 2
A magnetic refrigeration technology is a solid-state refrigeration mode based on the magnetocaloric effect
Data Source
AI summary
Provided is a magnetic refrigeration device, including a first assembly and a second assembly, herein the second assembly is an annular assembly, the first assembly is located on a radial outer side or a radial inner side of the second assembly, the first assembly is a first magnet assembly, the second assembly is provided with an air gap space capable of accommodating a magnetic working medium bed, the first assembly is configured to rotate relative to the second assembly, and directions of a magnetic line of force of the first magnet assembly are distributed in the circumferential direction of the annular second assembly.