MAGNETIC REGENERATOR UNIT AND MAGNETIC COOLING SYSTEM WITH THE SAME

• US 20150267943A1
• Filed: 03/09/2015
• Published: 09/24/2015
• Est. Priority Date: 03/18/2014
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd., SungKyunKwan University's Research & Business Foundation (SungKyunKwan University (SKKU))
• Original Assignee: Samsung Electronics Co. Ltd., SungKyunKwan University's Research & Business Foundation (SungKyunKwan University (SKKU))
• Inventors: KIM, Jin Han, KUK, Keon, CHOI, Woo Hyek, PARK, II Han
• Granted Patent: US 10,030,895 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F25B 21/00 Machines, plants or systems, using electric or magnetic effects
• CPC Class Codes: F25B 2321/0022 with a rotating or otherwise moving magnet
• CPC Class Codes: H01F 1/012 adapted for magnetic entropy change by magnetocaloric effect, e.g. used as magnetic refrigerating material refrigeration systems using magnetic effects F25B21/00
• CPC Class Codes: Y02B 30/00 Energy efficient heating, ventilation or air conditioning [HVAC]

Abstract

A terminal may be provided with a magnetic regenerator unit using a magnetocaloric effect of magnetocaloric materials and a magnetic cooling system having the same. By a circular magnetic regenerator structure capable of evenly flowing heat transfer fluid and magnetic field and the flow of the heat transfer fluid being changed in the same way, and a magnetic band having a relative permeability, similar to a relative permeability of the magnetic regenerator, high efficiency of a flux generator may be obtained while reducing torque of a rotator. Power consumption for driving may be reduced due to the reduction of the cogging torque, and the magnetic band may be manufactured at a low cost by using inexpensive iron powder.

Claims

1. A magnetic regenerator unit comprising:

a magnetic regenerator formed of magnetocaloric materials; and

a magnetic band having a relative permeability similar to a relative permeability of the magnetic regenerator and disposed on one side of the magnetic regenerator.

5. The magnetic regenerator unit of claim 1, wherein:

the magnetic band is formed of a compound material of magnetic material having a high relative permeability and a non-magnetic material.

6. The magnetic regenerator unit of claim 5, wherein:

the magnetic material comprises an iron powder and the non-magnetic material comprises at least one of air, plastic, polymer and iron oxide.

7. The magnetic regenerator unit of claim 5, wherein:

a relative permeability of the magnetic band is changed by mixing the magnetic material and the non-magnetic material after adjusting a volume ratio of the magnetic material and the non-magnetic material or adjusting a density ratio of a magnetic material per unit magnetic area.

8. The magnetic regenerator unit of claim 1, wherein:

the relative permeability of the magnetic band has a value in the range of 20% to 150% of a relative permeability of magnetocaloric material.

9. The magnetic regenerator unit of claim 1, wherein:

the relative permeability of the magnetic band has a value in the range of the relative permeability of the magnetocaloric material changed by the temperature change.

10. The magnetic regenerator unit of claim 1, wherein:

the magnetic band comprises a portion having one or more different relative permeabilities in a longitudinal direction of forming the temperature gradient of the magnetic regenerator.

11. The magnetic regenerator unit of claim 1, wherein:

the magnetic band is formed in the same shape as the magnetic regenerator and disposed on one side of the magnetic regenerator.

12. The magnetic regenerator unit of claim 1, wherein:

the magnetic band is formed in an elliptical shape which is different from the magnetic regenerator and disposed on one side of the magnetic regenerator.

13. The magnetic regenerator unit of claim 1, wherein:

the magnetic band comprises an accommodation groove in which the magnetic regenerator is accommodated.

14. The magnetic regenerator unit of claim 13, wherein:

the magnetic band is formed in a shape of a ring.

15. The magnetic regenerator unit of claim 1, wherein:

a thickness of the magnetic band is different from a thickness of the magnetic regenerator.

16. The magnetic regenerator unit of claim 1, further comprising:

a container configured to receive the magnetic regenerator and the magnetic band, wherein the container comprises a magnetic regenerator accommodation groove in which the magnetic regenerator is inserted and fixed, and a magnetic band accommodation groove in which the magnetic band is inserted and fixed.

17. The magnetic regenerator unit of claim 16, wherein:

the container is formed in a shape of a ring, and

the magnetic regenerator accommodation groove and the magnetic band accommodation groove are alternately arranged in a circumferential direction.

2. A magnetic regenerator unit comprising:

a plurality of magnetic regenerators formed of magnetocaloric materials; and

a plurality of magnetic bands having a relative permeability similar to a relative permeability of the magnetic regenerators and disposed on one side of the magnetic regenerators,

wherein the plurality of magnet regenerators are disposed to be spaced apart from each other, and

wherein the plurality of magnetic bands are disposed to be spaced apart from each other between the plurality of the magnetic regenerators.

3. The magnetic regenerator unit of claim 2, wherein:

the magnetic regenerators and the magnetic bands are alternately disposed with each other in a circumferential direction.

4. The magnetic regenerator unit of claim 3, wherein:

the magnetic band is formed in a shape of a curved panel having a curvature identical to the curvature of a cylindrical surface of the magnetic band, and disposed between the magnetic regenerators.

18. A magnetic cooling system comprising:

a flux generator to generate a magnetic field to obtain a magnetocaloric effect from magnetocaloric materials;

a magnetic regenerator unit disposed in the magnetic field generated by the flux generator;

a fluid supply apparatus to form a temperature gradient from the magnetocaloric effect; and

a heat exchanger to exchange heat with the outside by using the temperature gradient;

wherein the magnetic regenerator unit comprises a magnetic regenerator formed of magnetocaloric materials, and a magnetic band having a relative permeability similar to a relative permeability of the magnetic regenerator and disposed on one side of the magnetic regenerator.

19. The magnetic regenerator unit of claim 18, wherein:

the magnetic regenerator and the magnetic band are alternately disposed with each other in a circumferential direction.

20. The magnetic regenerator unit of claim 19, wherein:

the magnetic band is formed in a shape of a curved panel having a curvature identical to the curvature of a cylindrical surface of the magnetic band, and disposed between the magnetic regenerators.

21. The magnetic regenerator unit of claim 18, wherein:

the magnetic band is formed of a compound material of magnetic material having a high relative permeability and a non-magnetic material.

22. The magnetic regenerator unit of claim 21, wherein:

a relative permeability of the magnetic band is changed by mixing the magnetic material and the non-magnetic material after adjusting a volume ratio of the magnetic material and the non-magnetic material or adjusting a density ratio of a magnetic material per unit magnetic area.

23. The magnetic regenerator unit of claim 18, wherein:

the magnetic band comprises a portion having one or more different relative permeabilities in a longitudinal direction of forming the temperature gradient of the magnetic regenerator.

24. The magnetic regenerator unit of claim 18, wherein:

a thickness of the magnetic band differs from a thickness of the magnetic regenerator.

25. The magnetic regenerator unit of claim 18, further comprising:

a container configured to receive the magnetic regenerator and the magnetic band, wherein the container comprises a magnetic regenerator accommodation groove in which the magnetic regenerator is inserted and fixed, and a magnetic band accommodation groove in which the magnetic band is inserted and fixed.

26. The magnetic regenerator unit of claim 25, wherein:

the container is formed in a shape of a ring, and

the magnetic regenerator accommodation groove and the magnetic band accommodation groove are alternately arranged in a circumferential direction.

27. The magnetic cooling system of claim 18, wherein:

the flux generator comprises a yoke as a stator and a permanent magnet as a rotator.

28. The magnetic cooling system of claim 27, wherein:

the yoke is formed in a shape of a hollow cylinder and made of silicon steel.

29. The magnetic cooling system of claim 27, wherein:

the magnetic regenerator and the magnetic band are arranged between the yoke and the permanent magnet in a circumferential direction.

30. The magnetic cooling system of claim 27, further comprising:

a driving apparatus configured to rotate a rotator provided with the permanent magnet, wherein the driving apparatus comprises a motor installed on the outside of the magnetic cooling system.

31. The magnetic cooling system of claim 27, further comprising:

a driving apparatus configured to rotate a rotator provided with the permanent magnet, wherein the driving apparatus comprises teeth and a coil formed on the stator yoke.

32. The magnetic cooling system of claim 27, wherein the magnetic regenerator unit includes a gap between a magnetic regenerator and a magnetic band.

33. The magnetic cooling system of claim 27, wherein a shape of the magnetic regenerator is identical to a shape of the magnetic band to reduce cogging torque.

34. The magnetic cooling system of claim 27, wherein the magnetic band is formed in a shape of an oval.

35. The magnetic cooling system of claim 27, wherein the magnetic regenerator is formed in a shape of an oval.

36. The magnetic cooling system of claim 27, wherein the magnetic band is disposed inside a magnetic regenerator without a gap between the magnetic band and the magnetic regenerator.