Vacuum insulation panel and method for the production thereof

Abstract

The present invention relates to a vacuum insulation panel ( 1 ) having a core ( 5 ) having insulating hollow spaces and cover layers ( 11 ) closing off the core ( 5 ) from the environment, the hollow spaces of the core ( 5 ) being formed by two chambers ( 3 ) sealed off from each other in a gas-tight fashion, extending together with the walls ( 4 ) or intermediate walls thereof from one cover layer ( 11 ) to the other cover layer ( 11 ) and being formed from the walls ( 4 ) or intermediate walls and the cover layers ( 11 ). The present invention further relates to a method for producing such a vacuum insulation panel ( 1 ), wherein a) plates ( 7 ) are produced having the shape and arrangement in cross section of walls ( 4 ) of the half chamber ( 3 ) connecting to each other, but being substantially longer than the height of the walls ( 4 ) of the chambers ( 3 ), then b) a composite ( 9 ) then being produced, in that a further such plate ( 7 ) is laid on a first such plate ( 7 ) such that the entire chambers ( 3 ) are formed, c) the plates ( 7 ) are then connected to each other, in a gas-tight and permanent fashion, at the contact points ( 8 ) thereof, d) further plates ( 7 ) are then laid on the uppermost plate ( 7 ) of the composite ( 9 ) according to step b) and connected, in a gas-tight and permanent fashion, to the uppermost plate ( 7 ) of the composite ( 9 ) according to step c), e) the composite ( 9 ) is further cut transverse to the plates ( 7 ) into chamber discs ( 17 ) having the desired thickness corresponding to the intended chamber height, and f) the chamber discs ( 17 ) are connected, in a gas-tight and permanent fashion, to the cover layers ( 11 ) on the open sides of the chambers ( 3 ).

1 . Vacuum insulation panel with a core with insulating hollow spaces and also cover layers closing the core in a tight fashion relative to the surroundings,
 wherein the hollow spaces of the core are formed by chambers, wherein these chambers are closed gas-tight relative to each other and reach, together with their walls or intermediate walls, from a cover layer to the other cover layer, and are formed from the walls or intermediate walls and the cover layers.   
   
   
       2 . Vacuum insulation panel according to  claim 1 ,
 wherein the walls or intermediate walls of the chambers form a honeycomb structure.   
   
   
       3 . Vacuum insulation panel according to  claim 2 ,
 wherein the honeycomb structure is rectangular, hexagonal, or octagonal, contains circular shapes, or is regular or irregular.   
   
   
       4 . Vacuum insulation panel according to  claim 1 ,
 wherein each cover layer is made from a gas-tight material or is coated with a gas-tight material.   
   
   
       5 . Vacuum insulation panel according to  claim 1 ,
 wherein each cover layer contains a layer or plate made from, in particular, reinforced epoxy, melamine, or phenolic resin or the like in direct contact with the walls or intermediate walls of the chambers.   
   
   
       6 . Vacuum insulation panel according to  claim 5 ,
 wherein the reinforcement of the cover layer contains fiberglass material, kraft paper, sisal or the like.   
   
   
       7 . Vacuum insulation panel according to  claim 1 ,
 wherein each cover layer has a protective layer on its side facing away from the walls or intermediate walls of the chambers.   
   
   
       8 . Vacuum insulation panel according to  claim 7 ,
 wherein the protective layer contains a reflective high-barrier film or an aluminum foil or a high-barrier coating or aluminum coating or the like.   
   
   
       9 . Vacuum insulation panel according to  claim 1 ,
 wherein each cover layer has a thickness greater than approximately 0.5 mm, advantageously greater than ca. 1 mm, and especially preferred approximately 1 mm.   
   
   
       10 . Vacuum insulation panel according to  claim 1 ,
 wherein the walls or intermediate walls of the chambers are made from a gas-tight material or are coated with a gas-tight material.   
   
   
       11 . Vacuum insulation panel according to  claim 1 ,
 wherein the walls or intermediate walls of the chambers contain paper or cellulose and/or the walls or intermediate walls of the chambers have a coating with melamine resin, phenolic resin, or a melamine resin-phenolic resin derivative and/or the walls or intermediate walls of the chambers contain kraft paper or hard paper, in particular, with reinforcement.   
   
   
       12 . Vacuum insulation panel according to  claim 1 ,
 wherein the walls or intermediate walls of the chambers contain a metallic foil or are coated with a metallic layer.   
   
   
       13 . Vacuum insulation panel according to  claim 1 ,
 wherein the walls or intermediate walls of the chambers exhibit, with respect to one cubic meter, thermal conductivity of less than ca. 0.3 W/mK, advantageously less than approximately 0.2 W/mK, and especially preferred less than approximately 0.1 W/mK.   
   
   
       14 . Vacuum insulation panel according to  claim 1 ,
 wherein the walls or intermediate walls of the chambers have a thickness of approximately 0.5 mm.   
   
   
       15 . Vacuum insulation panel according to  claim 1 ,
 wherein a vacuum of approximately 98% prevails in the chambers.   
   
   
       16 . Vacuum insulation panel according to  claim 1 ,
 wherein a heat-insulating gas, for example, argon or another noble gas or a corresponding gas mixture is contained in the chambers.   
   
   
       17 . Vacuum insulation panel according to  claim 1 , wherein the core is sealed with artificial resin or the like at its free edges between the cover layers. 
   
   
       18 . Method for the production of a vacuum insulation panel according to  claim 1 ,
 wherein a) first, plates are produced that have, in cross section, the shape and arrangement of walls of half-chambers connected to each other but are significantly longer than the height of the walls of the chambers,   b) then a composite is produced in which, on a first such plate, another such plate is placed so that whole chambers are formed,   c) then the plates are connected to each other in a permanent and gas-tight fashion at their contact points,   d) then additional plates are placed according to step b) one after the other onto the uppermost plate of the composite and are connected in a permanent and gas-tight fashion to the uppermost plate of the composite according to step c),   e) then the composite is cut perpendicular to the plates into chamber discs with the desired thickness corresponding to the intended chamber height, and   f) finally, the chamber discs are connected in a permanent and gas-tight fashion to the cover layers on the open sides of the chambers.   
   
   
       19 . Method according to  claim 18 , wherein the cover layers are connected to the corresponding chamber discs one after the other and that the second cover layer is connected to the assembly made from the chamber discs and the first cover layer at a low pressure, in a vacuum, or in a gas atmosphere with a gas that is provided as a filling for the chambers. 
   
   
       20 . Method according to  claim 18 ,
 wherein the cover layers are simultaneously connected to the corresponding chamber discs and that the cover layers are connected to the chamber discs at a low pressure, in a vacuum, or in a gas atmosphere with a gas that is provided as a filling for the chambers.