Magnetic heating/cooling apparatus

• US 9,400,126 B2
• Filed: 11/13/2012
• Issued: 07/26/2016
• Est. Priority Date: 11/24/2011
• Status: Active Grant

• Current Assignee: Nissan Motor Co., Ltd.
• Original Assignee: Nissan Motor Co., Ltd.
• Inventors: Takahashi, Hidekazu, Tasaki, Yutaka
• Primary Examiner(s): Ali, Mohammad M
• Application Number:
  US14/359,671
• Publication Number:
  US 20140305139A1
• Time in Patent Office: 1,351 Days
• Field of Search: 62/31
• US Class Current: 1/1
• CPC Class Codes: F25B 21/00 Machines, plants or systems, using electric or magnetic effects
• CPC Class Codes: F25B 2321/002 by using magneto-caloric effects
• CPC Class Codes: F25B 2321/0022 with a rotating or otherwise moving magnet
• CPC Class Codes: Y02B 30/00 Energy efficient heating, ventilation or air conditioning [HVAC]

Abstract

[Problem to be solved] To reduce the fluctuation in the driving force.

[Means to solve Problem] A magnetic cooling/heating apparatus comprising: a heat transfer unit 1000A comprising a plurality of heat transfer devices 50-1, 50-2, . . . arranged in parallel at intervals, wherein the heat transfer device 50-1 comprises magnetic bodies 10A-10F with a magneto-caloric effect and heat-conductive parts 30A-30G that transfer the heat of the magnetic bodies 10A-10F, both of which are alternately arranged; a magnetic unit 2000A comprising a plurality of magnets 21A, 21C, . . . that are arranged so as to face against each of the magnetic bodies 10A-10F of the heat transfer unit 1000A and to selectively apply and remove the magnetic field to/from each of the magnetic bodies 10A-10F; and a motor 350 that moves at least one of the heat transfer unit 1000A and the magnetic unit 2000A facing each other, relative to each other in the direction in which the heat transfer devices 50-1, 50-2, . . . are arranged, wherein a magnetically-permeable heat-insulating part 60 that has the equivalent magnetic permeability to that of the magnetic bodies 10A-10F and blocks heat conduction is formed between the heat transfer devices 50-1, 50-2, . . . of the heat transfer unit 1000A.

Claims

1. A magnetic cooling/heating apparatus comprising:

a heat transfer unit comprising a plurality of heat transfer devices arranged in parallel at intervals, wherein the heat transfer device comprises magnetic bodies with a magneto-caloric effect and heat-conductive parts that transfer the heat of the magnetic bodies, both of which are alternately arranged;

a magnetic unit comprising a plurality of magnets that are arranged so as to face against each of the magnetic bodies of the heat transfer unit and to selectively apply and remove the magnetic field to/from each of the magnetic bodies; and

a motor that moves at least one of the heat transfer unit and the magnetic unit facing each other, relative to each other in the direction in which the heat transfer devices are arranged,

wherein a magnetically-permeable heat-insulating part that has the equivalent magnetic permeability to that of the magnetic bodies and blocks heat conduction is formed between the heat transfer devices of the heat transfer unit.

2. The magnetic cooling/heating apparatus according to claim 1, wherein a plurality of heat transfer units and a plurality of magnetic units are alternately layered at intervals, and the motor moves at least either a plurality of layered heat transfer units or a plurality of layered magnetic bodies relatively and integrally.

3. The magnetic cooling/heating apparatus according to claim 1, wherein the magnetically-permeable heat-insulating part is formed so as to fill a gap between the magnetic bodies of the heat transfer devices adjoining each other.

4. The magnetic cooling/heating apparatus according to claim 1, wherein the magnetically-permeable heat-insulating part is formed by mixing metallic powder with a large magnetic permeability into a material with a heat-insulating property, to the degree that the heat-insulating property thereof is not inhibited.

5. The magnetic cooling/heating apparatus according to claim 1, wherein the heat transfer unit and the magnetic unit are formed in a hollow circular shape, and at least one of the heat transfer unit and the magnetic unit is supported freely rotatable by the motor, and

the magnetic cooling/heating apparatus further comprising:

a lower-temperature-side heat-exchanging part arranged via the heat-conductive parts at one end of the heat transfer devices of the heat transfer unit; and

a higher-temperature-side heat-exchanging part arranged via the heat-conductive parts at the other end of the heat transfer devices,

wherein a fan is provided at an inner circumferential space or an outer circumferential space of the heat transfer unit or the magnetic unit which rotates, the fan supplying a cooling medium into a cooling medium pathway of the lower-temperature-side heat-exchanging part or the higher-temperature-side heat-exchanging part.

6. The magnetic cooling/heating apparatus according to claim 5, wherein the higher-temperature-side heat-exchanging part is arranged at an inner circumferential space of the heat transfer unit and the magnetic unit,

the lower-temperature-side heat-exchanging part is arranged at an outer circumferential space of the heat transfer unit and the magnetic unit,

the cooling medium pathway of the higher-temperature-side heat-exchanging part has a cylindrical shape so as to communicate in the layer direction of the heat transfer unit and the magnetic unit, and

the cooling medium pathway of the lower-temperature-side heat-exchanging part has a shape so as to render a plural cooling medium pathways communicate each other, the plural cooling medium pathways being individually formed at the outer circumferential space of the heat transfer unit or at the outer circumferential space of the each of the heat transfer unit and the magnetic unit.

7. The magnetic cooling/heating apparatus according to claim 1, wherein the motor is an outer-rotor motor comprising a rotational shaft integrally rotating the magnetic unit as a rotor.

8. The magnetic cooling/heating apparatus according to claim 1, wherein the magnetic body with the magneto-caloric effect are either a positive magnetic body that generates heat upon the magnetic-field application thereto and absorbs heat upon the magnetic-field removal therefrom, or a negative magnetic body that absorbs heat upon the magnetic-field application thereto and generates heat upon the magnetic-field removal therefrom.

9. A magnetic cooling/heating apparatus comprising:

heat transfer units comprising a plurality of heat transfer devices arranged in parallel with gaps therebetween, wherein the heat transfer device comprises magnetic bodies with a magneto-caloric effect and heat-conductive parts that transfer the heat of the magnetic bodies, both of which are alternately arranged; and

magnetic units comprising a plurality of magnets that are arranged so as to face against each of the magnetic bodies of the heat transfer unit and to selectively apply and remove the magnetic field to/from each of the magnetic bodies,

wherein the heat transfer units and the magnetic units are alternately layered at intervals,

at least a part of the heat transfer unit is arranged so as to be shifted from another heat transfer unit in an arrangement direction of the heat transfer devices, or at least a part of the magnetic unit is arranged so as to be shifted from another magnetic unit in the arrangement direction of the heat transfer devices, and

a motor moves at least one of layered heat transfer units and the magnetic units integrally and relatively to each other in the arrangement direction of the heat transfer devices.