Magnetic work body and magnetic heat pump device using same

Abstract

A plurality of tubular bodies 30 formed of a magnetic work substance and having a porosity adjusting hole 30a adjusting the porosity when a plurality of rod-shaped bodies are made adjacent to each other and joined in an axial direction of the rod-shaped body are joined so that the cross-sectional shapes of gaps 31 surrounded by the adjacent tubular bodies have the same shape and heat medium passages passing a heat medium are formed with the inner surfaces of the tubular bodies and the gaps 31.

1 . A magnetic work body comprising:
 a tubular body formed of a magnetic work substance and having a porosity adjusting hole in an axial direction configured to adjust porosity when a plurality of rod-shaped bodies are made adjacent to each other and joined inside the rod-shaped body.   
     
     
         2 . A magnetic work body comprising:
 a plurality of tubular bodies formed of a magnetic work substance and having a porosity adjusting hole in an axial direction configured to adjust porosity when a plurality of rod-shaped bodies are made adjacent to each other and joined inside the rod-shaped body,   wherein the tubular bodies are joined in such a manner that cross-sectional shapes of gaps surrounded by the adjacent tubular bodies have a same shape and heat medium passages passing a heat medium are formed with inner surfaces of the tubular bodies and the gaps.   
     
     
         3 . The magnetic work body according to  claim 2 ,
 wherein the gap is formed to be surrounded by four pieces of the tubular bodies.   
     
     
         4 . The magnetic work body according to  claim 3 ,
 wherein the tubular bodies are arranged in such a manner that allowable grid lines setting a ±10% allowable level to a standard grid line connecting centers of the four pieces of the tubular bodies are set, and then the center is disposed in a region surrounded by intersections of the allowable grid lines.   
     
     
         5 . The magnetic work body according to  claim 3 ,
 wherein a corner portion entering between two pieces of the adjacent tubular bodies is a heat medium flow limited region filled with the magnetic work substance in the gap.   
     
     
         6 . The magnetic work body according to  claim 1 ,
 wherein the tubular body contains an extrusion-molded article of the magnetic work substance.   
     
     
         7 . The magnetic work body according to  claim 2 ,
 wherein the tubular body is configured by arranging two or more of the magnetic work substances different in a temperature zone where a high magnetocaloric effect is exhibited in the axial direction in such a manner that the temperature zones become high in order.   
     
     
         8 . The magnetic work body according to  claim 2 ,
 wherein the magnetic work substance is any one of an Mn-based material and an La-based material.   
     
     
         9 . A magnetic heat pump device comprising:
 ducts which are formed in a cylindrical fixing portion and in which the magnetic work bodies according to  claim 2  to are disposed along a heat medium flowing direction;   a magnetic field changing mechanism configured to change a magnitude of a magnetic field applied to the magnetic work body of the duct;   a heat medium moving mechanism configured to move the heat medium between a high temperature end and a low temperature end of the magnetic work body;   a heat dissipation side heat exchanger configured to cause the heat medium on a side of the high temperature end to dissipate heat; and   a heat absorption side heat exchanger configured to cause the heat medium on a side of the low temperature end to adsorb heat.   
     
     
         10 . The magnetic heat pump device according to  claim 9 ,
 wherein the magnetic work body is configured to have a circular arc-shaped cross-section by cutting an outer peripheral portion of a rectangular parallelepiped having a rectangular cross-section formed by joining the plurality of tubular bodies to be matched with a cross-sectional shape of the duct.   
     
     
         11 . The magnetic work body according to  claim 4 ,
 wherein a corner portion entering between two pieces of the adjacent tubular bodies is a heat medium flow limited region filled with the magnetic work substance in the gap.   
     
     
         12 . The magnetic work body according to  claim 11 ,
 wherein the tubular body contains an extrusion-molded article of the magnetic work sub stance.   
     
     
         13 . The magnetic work body according to  claim 3 ,
 wherein the tubular body is configured by arranging two or more of the magnetic work substances different in a temperature zone where a high magnetocaloric effect is exhibited in the axial direction in such a manner that the temperature zones become high in order.   
     
     
         14 . The magnetic work body according to  claim 4 ,
 wherein the tubular body is configured by arranging two or more of the magnetic work substances different in a temperature zone where a high magnetocaloric effect is exhibited in the axial direction in such a manner that the temperature zones become high in order.   
     
     
         15 . The magnetic work body according to  claim 11 ,
 wherein the tubular body is configured by arranging two or more of the magnetic work substances different in a temperature zone where a high magnetocaloric effect is exhibited in the axial direction in such a manner that the temperature zones become high in order.   
     
     
         16 . The magnetic work body according to  claim 3 ,
 wherein the magnetic work substance is any one of an Mn-based material and an La-based material.   
     
     
         17 . The magnetic work body according to  claim 4 ,
 wherein the magnetic work substance is any one of an Mn-based material and an La-based material.   
     
     
         18 . The magnetic work body according to  claim 7 ,
 wherein the magnetic work substance is any one of an Mn-based material and an La-based material.   
     
     
         19 . The magnetic work body according to  claim 11 ,
 wherein the magnetic work substance is any one of an Mn-based material and an La-based material.   
     
     
         20 . A magnetic heat pump device comprising:
 ducts which are formed in a cylindrical fixing portion and in which the magnetic work bodies according to  claim 11  are disposed along a heat medium flowing direction;   a magnetic field changing mechanism configured to change a magnitude of a magnetic field applied to the magnetic work body of the duct;   a heat medium moving mechanism configured to move the heat medium between a high temperature end and a low temperature end of the magnetic work body;   a heat dissipation side heat exchanger configured to cause the heat medium on a side of the high temperature end to dissipate heat; and   a heat absorption side heat exchanger configured to cause the heat medium on a side of the low temperature end to adsorb heat.