Magnetic refrigeration device

Patent metadata

Field	Value
Publication number	US-12416432-B2
Application number	US-201917598992-A
Country	US
Kind code	B2
Filing date	Dec 16, 2019
Priority date	May 9, 2019
Publication date	Sep 16, 2025
Grant date	Sep 16, 2025

Abstract

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.

First claim

What is claimed is:

1. A magnetic refrigeration device, comprising:
a first assembly; and
a second assembly, wherein 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 in a circumferential direction, the second assembly is provided with a plurality of annular segments arranged at intervals in the circumferential direction, and the air gap space is arranged between adjacent annular segments of the plurality of annular segments; 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 of the annular second assembly;
wherein the first assembly comprises an outer magnet assembly located on the radial outer side of the second assembly and an inner magnet assembly located on the radial inner side of the second assembly; the outer magnet assembly further comprises at least one first outer permanent magnet, at least one first outer soft magnet, and the first outer soft magnet is arranged between two adjacent first outer permanent magnets.

2. The magnetic refrigeration device according to claim 1 , wherein
the second assembly is also a second magnet assembly, and directions of a magnetic line of force of the second assembly are also distributed along the circumferential direction of the annular second assembly.

3. The magnetic refrigeration device according to claim 2 , wherein
magnetic lines of force of the second magnet assembly are serially connected to form a closed loop.

4. The magnetic refrigeration device according to claim 1 , wherein the outer magnet assembly and the inner magnet assembly correspond to each other and occupy a same angle in the circumferential direction.

5. The magnetic refrigeration device according to claim 4 , wherein:
the outer magnet assembly comprises a first unit and a second unit that are separated, and a magnetic line of force of the first unit and a magnetic line of force of the second unit are serially connected through the second assembly to form a closed loop of the magnetic lines of force.

6. The magnetic refrigeration device according to claim 5 , wherein:
while the outer magnet assembly comprises a first unit and a second unit that are separated, the first unit and the second unit are connected by a non-magnetic outer connecting piece.

7. The magnetic refrigeration device according to claim 4 , wherein:
the inner magnet assembly comprises a third unit and a fourth unit that are separated, and a magnetic line of force of the third unit and a magnetic line of force of the fourth unit are serially connected through the second assembly to form a closed loop of the magnetic lines of force.

8. The magnetic refrigeration device according to claim 7 , wherein:
while the inner magnet assembly comprises the third unit and the fourth unit that are separated, the third unit and the fourth unit are connected by a non-magnetic inner connecting piece.

9. The magnetic refrigeration device according to claim 1 , wherein:
while the second assembly is also the second magnet assembly, directions of magnetic lines of force of the second assembly, directions of magnetic lines of force of the inner magnet assembly and directions of magnetic lines of force of the outer magnet assembly are all in a same surrounding direction.

10. The magnetic refrigeration device according to claim 1 , wherein:
an edge of the first outer permanent magnet is also connected and provided with an outer end permanent magnet, and directions of magnetic lines of force of the outer end permanent magnet point to the magnetic working medium bed or extension lines of magnetic lines of force of the outer end permanent magnet pass through the magnetic working medium bed.

11. The magnetic refrigeration device according to claim 1 , wherein:
the inner magnet assembly further comprises at least one first inner permanent magnet and at least one first inner soft magnet, and the first inner soft magnet is arranged between two adjacent first inner permanent magnets.

12. The magnetic refrigeration device according to claim 11 , wherein:
an edge of the first inner permanent magnet is also connected and provided with an inner end permanent magnet, and directions of magnetic lines of force of the inner end permanent magnet point to the magnetic working medium bed or directions of extension lines of the magnetic lines of force of the inner end permanent magnet pass through the magnetic working medium bed.

13. The magnetic refrigeration device according to claim 2 , wherein:
the second assembly further comprises a second permanent magnet and a second soft magnet, the second soft magnet is arranged between two adjacent second permanent magnets, a pole shoe is also arranged between the second permanent magnet and the magnetic working medium bed, and the pole shoe is made of a soft magnetic material.

14. The magnetic refrigeration device according to claim 2 , wherein:
the second assembly further comprises a second permanent magnet and a second soft magnet, and the second permanent magnet is arranged between two adjacent second soft magnets, a pole shoe is also arranged between the second soft magnet and the magnetic working medium bed, and the pole shoe is made of a soft magnetic material.

15. The magnetic refrigeration device according to claim 14 , wherein:
the pole shoe and the second soft magnet are an integrally formed structure.

16. The magnetic refrigeration device according to claim 1 , wherein:
there are more than two magnetic working medium beds, the air gap space is a magnetic gap, and more than one magnetic working medium bed is placed in one magnetic gap.

17. The magnetic refrigeration device according to claim 16 , wherein:
there are 4 magnetic working medium beds and 4 magnetic gaps; or there are 6 magnetic working medium beds and 6 magnetic gaps.

Assignees

• Gree Electric Appliances Inc Zhuhai

Inventors

• Wang Kui
• Luo Sheng
• Yang Rong

Classifications

• F25B2321/0023

  with modulation, influencing or enhancing an existing magnetic field · CPC title

• H01F7/0273

  Magnetic circuits with PM for magnetic field generation · CPC title

• H01F7/021

  Construction of PM (H01F7/0278 takes precedence; PM compositions H01F1/032) · CPC title

• F25B2321/0022

  with a rotating or otherwise moving magnet · CPC title

• Y02B30/00

  Energy efficient heating, ventilation or air conditioning [HVAC] · CPC title