Magnetic cooling device and magnetocaloric module thereof

Abstract

A magnetic cooling device is provided, including a magnetocaloric module and a magnetic unit. The magnetocaloric module includes a bed, a first magnetocaloric material, a second magnetocaloric material and a thermal insulator. The first magnetocaloric material is disposed in the bed. The second magnetocaloric material is disposed in the bed, wherein the Curie Temperature of the second magnetocaloric material is greater than the Curie Temperature of the first magnetocaloric material. The thermal insulator is disposed between the first and second magnetocaloric materials to insulate heat conduction between the first and second magnetocaloric materials. The magnetic unit is coupled to the magnetocaloric module, wherein the magnetic unit reciprocally applies different magnetic fields to the first and second magnetocaloric materials, wherein a heat transfer fluid flows through the first and second magnetocaloric to transfer heat from a low temperature end to a high temperature end of the magnetocaloric module.

1 . A magnetic cooling device, comprising:
 a magnetocaloric module, comprising:
 a bed; 
 a first magnetocaloric material, disposed in the bed; 
 a second magnetocaloric material, disposed in the bed, wherein the Curie Temperature of the second magnetocaloric material is greater than the Curie Temperature of the first magnetocaloric material; and 
 a thermal insulator, disposed between the first and second magnetocaloric materials to insulate heat conduction between the first and second magnetocaloric materials; and 
   a magnetic unit, coupled to the magnetocaloric module, wherein the magnetic unit reciprocally applies different magnetic fields to the first and second magnetocaloric materials, wherein a heat transfer fluid flows through the first and second magnetocaloric to transfer heat from a low temperature end to a high temperature end of the magnetocaloric module.   
     
     
         2 . The magnetic cooling device as claimed in  claim 1 , wherein the thermal insulator has a chamber, and the chamber is a vacuum or filled with gas. 
     
     
         3 . The magnetic cooling device as claimed in  claim 1 , wherein the thermal insulator comprises Aerogel. 
     
     
         4 . The magnetic cooling device as claimed in  claim 1 , wherein the thermal insulator comprises POM. 
     
     
         5 . The magnetic cooling device as claimed in  claim 1 , wherein the thermal insulator comprises Teflon. 
     
     
         6 . The magnetic cooling device as claimed in  claim 1 , wherein the thermal insulator comprises Asbesto. 
     
     
         7 . The magnetic cooling device as claimed in  claim 1 , wherein at least one of the first and second magnetocaloric materials comprises gadolinium or gadolinium alloy. 
     
     
         8 . The magnetic cooling device as claimed in  claim 1 , wherein at least one of the first and second magnetocaloric materials comprises yttrium alloy or dysprosium alloy. 
     
     
         9 . The magnetic cooling device as claimed in  claim 1 , wherein at least one of the first and second magnetocaloric materials comprises manganese alloy or lanthanum alloy. 
     
     
         10 . The magnetic cooling device as claimed in  claim 1 , wherein the magnetic unit is moved relative to the magnetocaloric module. 
     
     
         11 . The magnetic cooling device as claimed in  claim 1 , wherein the first and second magnetocaloric materials are serially arranged along a central axis of the magnetocaloric module, and the heat transfer fluid passes through the first and second magnetocaloric materials along the central axis. 
     
     
         12 . A magnetocaloric module, disposed in a magnetic cooling device, wherein a magnetic unit of the magnetic cooling device reciprocally applies different magnetic fields to the magnetocaloric module, comprising:
 a bed;   a first magnetocaloric material, disposed in the bed;   a second magnetocaloric material, disposed in the bed, wherein the Curie Temperature of the second magnetocaloric material is greater than the Curie Temperature of the first magnetocaloric material; and   a thermal insulator, disposed between the first and second magnetocaloric materials to insulate heat conduction between the first and second magnetocaloric materials, wherein a heat transfer fluid flows through the first and second magnetocaloric to transfer heat from a low temperature end to a high temperature end of the magnetocaloric module.   
     
     
         13 . The magnetocaloric module as claimed in  claim 12 , wherein the thermal insulator has a chamber, and the chamber is a vacuum or filled with gas. 
     
     
         14 . The magnetocaloric module as claimed in  claim 12 , wherein the thermal insulator comprises Aerogel. 
     
     
         15 . The magnetocaloric module as claimed in  claim 12 , wherein the thermal insulator comprises POM. 
     
     
         16 . The magnetocaloric module as claimed in  claim 12 , wherein the thermal insulator comprises Teflon. 
     
     
         17 . The magnetocaloric module as claimed in  claim 12 , wherein the thermal insulator comprises Asbesto. 
     
     
         18 . The magnetocaloric module as claimed in  claim 12 , wherein at least one of the first and second magnetocaloric materials comprises gadolinium or gadolinium alloy. 
     
     
         19 . The magnetocaloric module as claimed in  claim 12 , wherein at least one of the first and second magnetocaloric materials comprises yttrium alloy or dysprosium alloy. 
     
     
         20 . The magnetocaloric module as claimed in  claim 12 , wherein at least one of the first and second magnetocaloric materials comprises manganese alloy or lanthanum alloy. 
     
     
         21 . The magnetocaloric module as claimed in  claim 12 , wherein the magnetic unit is moved relative to the magnetocaloric module. 
     
     
         22 . The magnetocaloric module as claimed in  claim 12 , wherein the first and second magnetocaloric materials are serially arranged along a central axis of the magnetocaloric module, and the heat transfer fluid passes through the first and second magnetocaloric materials along the central axis.