Truma Geratetechnik Gmbh & Co. Kg

Ulrich Höflinger

Wilhelm Laux

Mihai-Robert Dömötör

Franz Press

A method for regulating a gas burner, wherein the gas burner has a combustion air supply fan whose rotational speed can be set variably, has the following steps: &#x2014;operating the fan and detecting a fan rotational speed (nVBL); &#x2014;changing the fan rotational speed; &#x2014;measuring an ionization voltage (UION) which correlates with an ionization flow in a flame region of the gas burner; &#x2014;finding a minimum of a gradient of the measured ionization voltage at the current fan rotational speed; &#x2014;determining an operating point by measuring the current ionization voltage and storing as an operating point; &#x2014;while the burner is operating, continuously measuring the current ionization voltage; &#x2014;determining a deviation between the currently measured ionization voltage and the operating point; &#x2014;checking whether the deviation (Delta UION) is within a predefined limit (UY) and carrying out a case differentiation: +if the deviation is within the predefined limit (UY), continuing the continuous measurement of the current ionization voltage; +if the deviation is not within the predefined limit (UY), repeating the method from the above change in the fan rotational speed.

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Ulrich Höflinger