INTERCHANGEABLE GLASS CERAMIC TOPS FOR A COOKING STOVE

Abstract

The cooking stove top can be equipped with two different glass ceramic tops with different IR transmission spectra, which each have at least one cooking area, which is heated by a radiant heating body cooperating with a temperature-limiting adjusting device, which limits a surface temperature of the glass ceramic top installed in the cooking stove and/or the surroundings. To economically, variably, and individually adjust the IR transmission of one glass ceramic top with a higher IR transmittance to that of a lower IR transmittance of another glass ceramic top so that they are interchangeable, the glass ceramic top with the higher IR transmittance is provided with an absorbing and/or reflecting coating. When the glass ceramic tops are interchangeable, either can be used in a given cooking stove without changing an expensive temperature-limiting device that is designed for the cooking stove.

Description

BRIEF DESCRIPTION OF THE DRAWING

The objects, features and advantages of the invention will now be illustrated in more detail with the aid of the following description of the preferred embodiments, with reference to the accompanying figures in which:

FIG. 1 is a graphical illustration of the dependencies of the transmissions of two known types of glass ceramics on wavelength, which also shows the emission spectrum of a known heating strip with a radiation temperature of 1,300 K;

FIG. 2 is a graphical illustration of the same dependencies of the transmissions of two known types of ceramics on wavelength as in FIG. 1, but shows the emission spectrum of a known heated halogen body with a radiation temperature of 2,400 K; and

FIG. 3 is a graphical illustration of the same dependency of the transmission of a type 1 glass ceramic on wavelength as in FIG. 1, but with different full-surface enamel coatings a, b, and c of the present invention provided on the glass ceramic.

Claims

1. A stove top for a cooking stove, wherein said cooking stove comprises either a first glass ceramic top with a higher IR spectral transmittance or a second glass ceramic top with a lower IR spectral transmittance, which each have at least one cooking area thereon; a respective radiant heating body arranged below said at least one cooking area; and a temperature-limiting adjusting device cooperating with said respective radiant heating body, which limits a surface temperature of the glass ceramic top installed in the cooking stove to a maximum value; wherein said first glass ceramic top with said higher IR spectral transmittance is provided with means for absorbing or reflecting infrared radiation in order to change said higher IR spectral transmittance so as to be the same or substantially the same as that of said second glass ceramic top with said lower IR spectral transmittance, so that the temperature-limiting adjusting device for the radiant heating body may be retained in the cooking stove without any changes if said first glass ceramic top replaces said second glass ceramic top or is installed in said cooking stove instead of said second glass ceramic top.

2. The cooking stove top as defined in claim 1, wherein said means of absorbing or reflecting infrared radiation is an IR-absorbing coating or an IR-reflecting coating provided on said first glass ceramic top.

3. The stove top as defined in claim 2, wherein said IR-absorbing coating or said IR-reflecting coating extends over an entire surface of said first glass ceramic top.

4. The stove top as defined in claim 2, wherein said IR-absorbing coating or said IR-reflecting coating has a structured pattern or is in the form of a structured grid.

5. The stove top as defined in claim 2, wherein said IR-absorbing coating or said IR-reflecting coating is provided on a topside side and/or a bottom side of said first glass ceramic top.

6. The stove top as defined in claim 2, wherein said IR-absorbing coating or said IR-reflecting coating is applied to the first glass ceramic part by screen-printing.

7. The stove top as defined in claim 2, wherein said IR-absorbing coating or said IR-reflecting coating comprises enamel.

8. The stove top as defined in claim 2, wherein said IR-absorbing coating or said IR-reflecting coating comprises a lustrous paint and said lustrous paint has gold, and/or platinum, and/or palladium components.

9. The stove top as defined in claim 2, wherein said IR-absorbing coating or said IR-reflecting coating comprises a SnO2 coating and is provided on a bottom side of the first glass ceramic part.

10. The stove top as defined in claim 9, wherein said SnO2 coating has a predetermined thickness that causes an adjustment of said IR transmittance of said first glass ceramic top to that of said second glass ceramic top having said lower IR spectral transmission.

11. The stove top as defined in claim 9, wherein said first glass ceramic top has at least one IR-reflecting roughened surface region on an underside thereof.