A cooling device comprising a body with improved structural alignment

Abstract

The present invention relates to a cooling device comprising a body that has a liner and an outer case comprising a back wall made of a semi-rigid papery material such as a paperboard or a cardboard. The liner and the outer case define between them an intermediate volume filled with an insulation material, such as for instance polyurethane foam.

1 . A cooling device comprising a body having a liner, an outer case comprising a back wall made of a papery material, an intermediate volume between the liner and the outer case and an insulation material filled into the intermediate volume, characterized in that the back wall of the outer case has an outer surface and it comprises a plurality of protrusions and/or recesses arranged on the outer surface. 
     
     
         2 . The cooling device as in  claim 1 , characterized in that the protrusions and/or recesses are obtained on the outer surface of the back wall by pressing. 
     
     
         3 . The cooling device as in  claim 1 , characterized in that the protrusions and/or recesses are arranged substantially on the whole outer surface of the back wall. 
     
     
         4 . The cooling device as in  claim 1 , characterized in that at least some of the protrusions and/or recesses extend parallel to each other along vertical directions. 
     
     
         5 . The cooling device as in  claim 1 , characterized in that at least some of the protrusions and/or recesses extend parallel to each other along horizontal directions. 
     
     
         6 . The cooling device as in  claim 1 , characterized in that the protrusions and/or recesses define a plurality of closed shapes on the outer surface of the back wall. 
     
     
         7 . The cooling device as in  claim 1 , characterized in that the back wall comprises a raised central plateau and the protrusions and/or recesses are provided on the outer surface of the back wall on the raised central plateau. 
     
     
         8 . The cooling device as in  claim 7 , characterized in that the thickness of the back wall is increased on the central plateau. 
     
     
         9 . The cooling device as in  claim 8 , characterized in that the thickness increase of the back wall on the central plateau is comprised between 5 mm and 25 mm. 
     
     
         10 . The cooling device as in  claim 8 , characterized in that the protrusions and/or recesses have a thickness and/or a depth substantially equivalent to half of the thickness of the central plateau. 
     
     
         11 . The cooling device as in  claim 7 , characterized in that the raised central plateau is obtained on the outer surface of the back wall by means of blow molding. 
     
     
         12 . The cooling device as in  claim 1 , characterized in that it is a refrigerator. 
     
     
         13 . The cooling device as in  claim 1 , characterized in that it is a double door refrigerator. 
     
     
         14 . The cooling device as in  claim 1 , characterized in that it is a multi-door refrigerator.