Patent · US Expired

Electric heating unit with alternately heated surface areas

US5396047A · kind A · utility

33Cited by

13References

36Claims

0Family size

Assignee

E.G.O. Elektro-Gerate Blanc u. Fischer · DE

Inventors

Wilfried Schilling · Gondelsheim, DE
Robert Kicherer · Maulbronn, DE

Key dates

Filing date	Sep 14, 1992
Grant date	Mar 7, 1995
Priority date	—
Expiry date	Sep 14, 2012

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02B30/70
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A heating unit (1) for a cooking point has an outer heater (3) and an inner heater (4) located concentrically for separately heating an associated surface area (13, 14) of the overall heating surface (2). The two heaters (3, 4) can be differently regulated such that supplied power is periodically switched over and distributed in very short, but variable time intervals in a continuously alternating manner to the two heaters (3, 4). Switching over takes place in the passage of the alternating current characteristic through the zero line. Thus, without influencing a clicking rate, there can be a random power distribution on at least two surface areas (13, 14) of the same heating surface (2) and a high efficiency with a relatively simple control (10).

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