Sealed container, method of manufacturing the same, and vacuum heat insulating body

Abstract

A sealed container ( 1 ) includes: a metal container ( 3 ) including an opening portion ( 5 ) and a first internal space that is reduced in pressure; a solid matter ( 4 ) contained in the first internal space of the metal container; and a sealing member ( 2 ) made of glass containing at least alkali earth metal oxide or alkali metal oxide, and the sealing member is melted by heating and solidified by cooling to be joined to and seal the opening portion of the metal container.

1 . A sealed container comprising:
 a metal container including an opening portion and a first internal space that is reduced in pressure;   a solid matter contained in the first internal space of the metal container; and   a sealing member made of glass containing at least alkali earth metal oxide or alkali metal oxide, wherein   the sealing member is melted by heating and then solidified by cooling to be joined to and seal the opening portion of the metal container.   
     
     
         2 . The sealed container according to  claim 1 , wherein the alkali earth metal oxide of the sealing member is BaO or SrO. 
     
     
         3 . The sealed container according to  claim 1 , wherein:
 the sealing member is located inside the opening portion and joined to the opening portion; and   the metal container has a higher thermal expansion coefficient than the sealing member.   
     
     
         4 . The sealed container according to  claim 1 , wherein the metal container is made of aluminum. 
     
     
         5 . The sealed container according to  claim 1 , wherein:
 a narrow portion is formed at the opening portion of the metal container; and   the sealing member is joined to and seal the narrow portion.   
     
     
         6 . The sealed container according to  claim 1 , wherein:
 the solid matter contains a gas adsorbing material that does not deteriorate by a heat treatment; and   the sealed container serves as a gas adsorption device.   
     
     
         7 . A vacuum heat insulating body comprising:
 the gas adsorption device constituted by the sealed container according to  claim 6 ;   a core member; and   a hollow outer coat member including a second internal space in which the gas adsorption device and the core member are contained and which is reduced in pressure and sealed.   
     
     
         8 . The vacuum heat insulating body according to  claim 7 , wherein a through hole through which the gas adsorption device is open is formed by destroying the sealing member in the second internal space of the outer coat member. 
     
     
         9 . The vacuum heat insulating body according to  claim 8 , wherein:
 the opening portion of the metal container is formed in a tubular shape having a substantially flat cross section; and   the through hole is formed by applying an external force, acting in a direction along a short axis of the substantially flat cross section of the opening portion, to the sealing member to destroy the sealing member.   
     
     
         10 . The vacuum heat insulating body according to  claim 7 , wherein:
 the gas adsorption device is contained in the core member; and   the core member is interposed between the outer coat member and the gas adsorption device.   
     
     
         11 . The vacuum heat insulating body according to  claim 10 , further comprising a cut formed on the core member and communicating with a space in which the gas adsorption device is contained in the core member. 
     
     
         12 . The vacuum heat insulating body according to  claim 7 , further comprising a mark put on a portion of the outer coat member, the portion corresponding to a portion where the gas adsorption device is provided. 
     
     
         13 . The vacuum heat insulating body according to  claim 7 , further comprising a movement suppressing portion provided in the second internal space of the outer coat member and configured to suppress a movement of the gas adsorption device. 
     
     
         14 . The vacuum heat insulating body according to  claim 13 , wherein the movement suppressing portion is constituted by an inner bag configured to contain a part of the gas adsorption device or the entire gas adsorption device. 
     
     
         15 . The vacuum heat insulating body according to  claim 14 , wherein the inner bag is made of an elastic material. 
     
     
         16 . The vacuum heat insulating body according to  claim 15 , wherein the elastic material includes nonwoven fabric made of resin. 
     
     
         17 . The vacuum heat insulating body according to  claim 16 , wherein the resin forming the nonwoven fabric contains at least PP or PET. 
     
     
         18 . The vacuum heat insulating body according to  claim 13 , wherein the movement suppressing portion is constituted by an inner surface of the space in which the gas adsorption device is contained in the core member. 
     
     
         19 . A method of manufacturing a sealed container, comprising:
 containing a solid matter in a first internal space of a metal container; and   sealing an opening portion of the metal container by a sealing member, made of glass containing at least alkali earth metal oxide or alkali metal oxide, in such a manner that while reducing pressure of the first internal space of the metal container, the sealing member is melted by heating and solidified by cooling to be joined to the opening portion of the metal container.