Patent · US Expired

Apparatus for detecting the presence of a cooking vessel

US6259069A · kind A · utility

13Cited by

6References

10Claims

0Family size

Assignee

Diehl AKO Stiftung & Co. KG · DE

Inventors

Henno Schotten · Giengen an der Brenz, DE
Norbert Mörsch · Schallstadt, DE
Jorg Meyer · Aachen, DE

Key dates

Filing date	Sep 21, 2000
Grant date	Jul 10, 2001
Priority date	—
Expiry date	Sep 21, 2020

Classification

Technology area (CPC H)Electricity
CPC primaryH05B2213/05
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An apparatus for detecting the presence and/or the size of a cooking vessel (6) on an electrically heatable hotplate, having a resistance heating element (1) which is disposed under the hotplate and which is connected to an electrical heating voltage supply, wherein the resistance heating element (1) is used as a capacitive sensor for pot detection. The capacitance of the resistance heating element (1) in relation to a reference potential, preferably earth, is connected into an electrical resonant circuit whose resonance frequency can be detected by an evaluation unit, whereby it is possible to ascertain the presence and/or the size of a cooking vessel (6) on the hotplate. The resistance heating element (1) is connected to the heating voltage supply by way of electrical switching means, preferably inductors (DR1, DR2), and is connected into the resonant circuit by way of a further electrical switching means, preferably a separating capacitor (CN).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.