Patent · US Expired

Cooker with means for automatically controlling the heating of a pan with food material

US4714822A · kind A · utility

9Cited by

4References

8Claims

0Family size

Assignee

U.S. Philips Corporation · US

Inventors

Walter Braun · Schorndorf, DE
Reinhard Kersten · Aachen, DE
Egbert Kuhl · Aachen, DE

Key dates

Filing date	Mar 31, 1986
Grant date	Dec 22, 1987
Priority date	—
Expiry date	Mar 31, 2006

Classification

Technology area (CPC H)Electricity
CPC primaryH05B2213/07
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

Cooker automatically controlling the heating process when bringing a food material to the boil on an electric hotplate and preventing it from boiling over at the end of the heating process. At the beginning of the heating process the power supplied to an electric hotplate can be set to a constant value which can be selected. A microprocessor continuously determines the rise in the temperature of the base of the pan as a function of time. At a pan-base temperature above about 70.degree. C. the actual value of the rise in temperature is compared with a present desired value and when deviations occur the heating power is switched over so as to approximate the actual value of the rise in temperature to the desired value. At a pan-base temperature above about 90.degree. C. a bending point in the temperature rise of the pan base is reached after which the heating power is switched off.

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