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Method for monitoring the risk of damage in a cooking plate or glass plate

A glass surface and stove technology, applied in induction heating devices, household appliances, household stoves/stoves, etc., can solve the problems of safety margin and inaccuracy of temperature measurement, inability to reliably obtain stress conditions, etc., and achieve large thermal expansion. Effect

Inactive Publication Date: 2005-03-09
SCHOTT AG
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AI Technical Summary

Problems solved by technology

Conclusions about the corresponding stress conditions cannot be reliably drawn
[0010] The safety margins to be observed and the inaccuracy of the temperature measurement lead, for example, to the use of glass-ceramics with lower thermal expansion than necessary and thus more expensive for induction cooktops

Method used

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  • Method for monitoring the risk of damage in a cooking plate or glass plate

Examples

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Effect test

Embodiment Construction

[0025] figure 1 Shown is a cooker surface 10 of a common household cooker device, with four cooking zones 12a, 12b, 12c and 12d arranged on the cooker surface 10 and heated by electric heating devices respectively. The focal areas 12a, 12c and 12d are circular and have different diameters. The cooking area 12b is elongated.

[0026] Possible damage to the cooker surface 10 due to the thermal effects of the four heating devices is monitored by determining the thermally induced mechanical stresses at critical points on the cooker surface or at positions of typical significance for this, so that the heating can be switched off if necessary heating of the device. The figure shows, for example, a region 14 lying on the side of the heating zone of the cooking zone 12a. This area 14 is determined by calculations carried out previously, for example by a stress analysis within the scope of simulation calculations. In the typical cooktop 10 shown, area 14 is also the area of ​​great...

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Abstract

To provide a method of monitoring the risk of damaging a cooking surface or a glass surface for a cooking device, which makes it possible to use a material having a higher thermal expansivity than that of a conventionally-used material. A method of monitoring the risk of damaging a cooling surface for a cooking device, having at least one cooking area 12a, 12b, 12c and 12d which are arranged on the cooking surface 10 and can be heated by an electrically-operated heating device, and monitoring a damage of the cooking surface 10 based on the heating efficiency, wherein a mechanical stress of the cooking surface 10 induced by heat is directly detected.

Description

technical field [0001] The invention relates to a method for monitoring the risk of damage to a cooker surface of a cooker device having at least one cooking area arranged on the cooker surface and heated by an electric heating device, wherein damage to the cooker surface due to thermal effects is monitored. [0002] Furthermore, the invention relates to a method for monitoring the risk of breakage of a glass surface of a cooker appliance, wherein the glass surface is subjected to a thermal load from an electric heating device and the glass surface is monitored for damage due to thermal effects. Background technique [0003] The heating of the cooktop surface in radiant, contact or induction heated cooking arrangements leads to thermal expansion of the heated region. This thermal expansion will cause excessive local tensile stress on the surface of the cooker and rupture. [0004] There is also the risk of breakage due to thermally induced mechanical stresses on glass sheet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B6/12F24C7/04F24C15/10H05B3/74
CPCH05B3/74
Inventor 彼得·纳斯库尔特·肖珀特斯蒂芬·休伯特哈里·恩格尔曼帕特里克·肖伯
Owner SCHOTT AG
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