Method and device for flame signal detection

US10704785B2 · kind B2 · utility

Assignee

• VIESSMANN WERKE GMBH & CO. KG · DE

Inventors

• Martin Ries · Frankenberg, Hesse, DE
• Arno Clemens · Katzenelnbogen, DE
• Richard Pfüller · Dillenburg, DE
• Sebastian Hack · Marburg, DE

Key dates

• Filing date: Oct 26, 2016
• Grant date: Jul 7, 2020
• Expiry date: Apr 14, 2037

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F23N2229/10
• WIPO field: Thermal processes and apparatus
• WIPO sector: Mechanical engineering

Abstract

The invention proposes a method for the flame signal detection by means of an ionization electrode (15) protruding into a combustion zone of a burner, comprising the steps: detecting a first signal, which is dependent on an ionization current flowing off the ionization electrode (15), generating a second signal which has a predetermined periodic course, generating a third signal by adding the first signal and the second signal, comparing the third signal with a first threshold value and generating a fourth signal on the basis of the comparison of the third signal with the first threshold value, comparing the third signal with a second threshold value different from the first threshold value and generating a fourth signal on the basis of the comparison of the third signal with the second threshold value, and determining an operating variable of the burner on the basis of at least one of the fourth signal and the fifth signal. The invention additionally proposes a corresponding device for the flame signal detection.