Baking oven with baking oven muffle

US6392203B1 · kind B1 · utility

Assignee

• BSH Bosch und Siemens Hausgeräte GmbH · DE

Inventor

• Gerhard Schmidmayer · Bad Endorf, DE

Key dates

• Filing date: Sep 27, 2000
• Grant date: May 21, 2002
• Expiry date: Sep 27, 2020

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F24C15/005
• WIPO field: Thermal processes and apparatus
• WIPO sector: Mechanical engineering

Abstract

A baking oven includes a metallic baking oven muffle that can be closed off on a front side by a door. The muffle walls have heating elements for heating the cooking chamber to over approximately 180° C. and/or for heating the food disposed therein to be cooked. The muffle has a protective layer covering the muffle walls at least on the inner side. To improve the use properties of the baking oven muffle, the thickness of the protective layer is less than approximately 30 &mgr;m. The protective layer is formed as a hard sol-gel layer having a thickness of approximately 10 &mgr;m, preferably, between approximately 5 and 10 &mgr;m. The protective layer is transparent. The inner sides of the muffle serve as a reflector. A functional sol-gel layer is disposed on the hard sol-gel layer. The functional sol-gel layer has a thickness of approximately 10 &mgr;m, preferably, 2 to 3 &mgr;m. When the muffle is aluminum, the protective layer is an anodized aluminum oxide layer. The heating elements are applied to an insulating protective layer with thick-film technology. A stabilizing frame is substantially formed by the baking-oven muffle insulation. The frame supports the muffle on its out…