Vacuum heat insulating body, and heat insulating container and heat insulating wall employing same

Abstract

A vacuum heat insulating body includes core material and outer packing material that vacuum-seals core material. Core material includes first heat insulating core material and second heat insulating core material having ventilation characteristics. Moreover, first heat insulating core material has ventilation resistance greater than the ventilation resistance of second heat insulating core material. First heat insulating core material is configured with an open-cell resin, and second heat insulating core material is configured with a fiber material or a powder material having ventilation resistance smaller than the ventilation resistance of the open-cell resin.

1 . A vacuum heat insulating body comprising:
 a core material; and   an outer packing material that vacuum-seals the core material,   wherein the core material each includes a first heat insulating core material and a second heat insulating core material having ventilation characteristics, and   wherein the first heat insulating core material has ventilation resistance greater than ventilation resistance of the second heat insulating core material.   
     
     
         2 . The vacuum heat insulating body of  claim 1 ,
 wherein the first heat insulating core material is configured with an open-cell resin, and   wherein the second heat insulating core material is configured with a fiber material or a powder material having ventilation resistance smaller than ventilation resistance of the open-cell resin.   
     
     
         3 . The vacuum heat insulating body of  claim 2 , further comprising:
 an interposition that is disposed at a boundary between the first heat insulating core material and the second heat insulating core material.   
     
     
         4 . The vacuum heat insulating body of  claim 3 ,
 wherein the interposition is a resin sheet or a resin film.   
     
     
         5 . The vacuum heat insulating body of  claim 4 ,
 wherein the resin sheet or the resin film is a resin having no functional group.   
     
     
         6 . The vacuum heat insulating body of  claim 4 ,
 wherein a thickness of the resin sheet or the resin film ranges from 30 to 500 μm.   
     
     
         7 . The vacuum heat insulating body of  claim 4 , further comprising:
 a penetration hole that is formed in the resin sheet or the resin film.   
     
     
         8 . The vacuum heat insulating body of  claim 7 ,
 wherein a diameter of the penetration hole ranges from 0.1 to 4 mm.   
     
     
         9 . The vacuum heat insulating body of  claim 7 ,
 wherein the penetration hole includes a plurality of the penetration holes, and a pitch between each of the multiple penetration holes ranges from 2 to 90 mm.   
     
     
         10 . The vacuum heat insulating body of  claim 1 ,
 wherein the outer packing material includes an inner case and an outer case, and   wherein the first heat insulating core material is disposed on an inner case side.   
     
     
         11 . The vacuum heat insulating body of  claim 1 ,
 wherein an exhaust hole is provided from a surface of the first heat insulating core material toward the second heat insulating core material.   
     
     
         12 . The vacuum heat insulating body of  claim 11 ,
 wherein a diameter of the exhaust hole ranges from 1 to 5 mm.   
     
     
         13 . The vacuum heat insulating body of  claim 11 ,
 wherein the exhaust hole includes a plurality of the exhaust holes, and a pitch between each of the multiple exhaust holes is equal to or greater than 1 mm.   
     
     
         14 . The vacuum heat insulating body of  claim 3 ,
 wherein the second heat insulating core material is loaded in a packing bag material, and the packing bag material is configured with the interposition.   
     
     
         15 . The vacuum heat insulating body of  claim 1 ,
 wherein the second heat insulating core material is configured with an inorganic fiber material containing glass wool or rock wool.   
     
     
         16 . The vacuum heat insulating body of  claim 2 ,
 wherein the outer packing material internally includes a gas suction material which is sealed together with the core material, and   wherein the gas suction material is disposed on a first heat insulating core material side inside the outer packing material.   
     
     
         17 . The vacuum heat insulating body of  claim 1 ,
 wherein the outer packing material is configured with a pair of metal thin plates, and is configured by fixedly attaching edges of the pair of metal thin plates to each other and performing vacuum-sealing of an inside of the pair of metal thin plates.   
     
     
         18 . A heat insulating container that can be used as a heat insulating container retaining a substance of which a temperature is lower than a normal temperature by at least 100° C., the heat insulating container comprising:
 the vacuum heat insulating body of  claim 1 , 
 wherein the vacuum heat insulating body is configured such that one of the first heat insulating core material and the second heat insulating core material is disposed on a lower temperature side in the heat insulating container, the one of the first heating insulating core material and the second heat insulating core material having lower heat conductivity. 
 
     
     
         19 . A heat insulating wall that can be used as a heat insulating wall being used in an environment of 0° C. or lower, the heat insulating wall comprising:
 the vacuum heat insulating body  claim 7 , 
 wherein the vacuum heat insulating body is configured such that one of the first heat insulating core material and the second heat insulating core material is disposed on a lower temperature side in the heat insulating container, the one of the first heating insulating core material and the second heat insulating core material having lower heat conductivity.