A cavity having an enamel coating, a cooking appliance comprising such a cavity and a method for manufacturing such a cavity

Abstract

The present invention relates to a cavity ( 4 ) for a cooking appliance ( 2 ), in particular an oven, wherein the cavity ( 4 ) comprises—cavity walls ( 8 a, 8 b, 8 c, 8 d ) defining a cooking chamber ( 6 ) for cooking foodstuff, and—a central opening for placing foodstuff into the cooking chamber ( 6 ), characterised in that—at least one surface of at least one of the cavity walls ( 8 a, 8 b, 8 c, 8 d ) is coated with a layer ( 10 ) comprising aluminium, wherein said layer ( 10 ) further comprises a first coating ( 14 ) being made of a enamel having a low softening point.

1 . A cavity for an oven, wherein the cavity comprises:
 cavity walls defining a cooking chamber for cooking foodstuff, and   a central opening for placing foodstuff into the cooking chamber,   
       wherein
 at least one surface of at least one of the cavity walls is coated with a layer comprising aluminum, wherein said layer further comprises a first coating being made of an enamel having a low softening point. 
 
     
     
         2 . The cavity according to  claim 1 , wherein the first coating is an enamel having a softening point between 450 and 560° C. 
     
     
         3 . The cavity according to  claim 1 , wherein the first coating comprises aluminum. 
     
     
         4 . The cavity according to  claim 1 , wherein the first coating comprises polytetrafluoroethylene. 
     
     
         5 . The cavity according to  claim 1 , wherein the cavity walls are made of low carbon sheet steel. 
     
     
         6 . The cavity according to  claim 1 , wherein the layer comprises an aluminum oxide layer and an intermetallic layer comprising aluminum and iron. 
     
     
         7 . The cavity according to  claim 1 , wherein said at least one surface of the at least one of the cavity walls is an inner surface of the respective cavity walk. 
     
     
         8 . The cavity according to  claim 1 , wherein an outer surface of at least one of the cavity walls comprises a second coating. 
     
     
         9 . The cavity according to  claim 8 , wherein the second coating comprises a reflective material having a low emissivity. 
     
     
         10 . The cavity according to  claim 8 , wherein the second coating comprises aluminum. 
     
     
         11 . The cavity according to  claim 1 , wherein a thickness of the layer comprising aluminum is between 15 and 25 μm and/or a thickness of the first coating is between/about 30 and 60 μm and/or a thickness of the second coating is between 30 and 60 μm. 
     
     
         12 . An oven, comprising:
 a heatable cavity comprising the cavity according to  claim 1 ,   heating elements for heating said cavity, and   a door for closing a central opening of the cavity.   
     
     
         13 . A method for manufacturing a cavity for an oven, comprising at least the following steps:
 providing at least one cavity wall having at least one surface that is coated with a layer comprising aluminum,   providing the cavity by joining together the cavity walls and further components by means of laser welding.   
     
     
         14 . A method according to  claim 13 , wherein said surface is an inner surface of the cavity and the laser-welding of the cavity walls is from outer sides thereof. 
     
     
         15 . A method according to  claim 13 , wherein a first coating being made of a enamel having a low softening point is applied to said layer after the components of the cavity have been welded together by laser welding.