Ebm-Papst Landshut Gmbh

Bernhard Simon

Markus Weingart

Enno Jan Vrolijk

Jens Hermann

Andreas Kerschreiter

A method for evaluating a quasi-stationary pressure difference detectable by a sensor at a gas boiler. The gas boiler has a mixing device (), a fan (), a main flow regulator (), a control valve () and a safety valve (). The sensor detects a differential pressure between a pressure (p) at a measuring point upstream of the main flow regulator () and downstream of the control valve () and a reference pressure (p, p) at a reference measuring point. The sensor transmits a signal to an electronic evaluation system. The electronic evaluation system compares the differential pressure during a pre-purge phase, wherein the safety valve () is closed, with the differential pressure after the pre-purge phase and detects an error by the comparison.

Method for evaluating a quasi-stationary pressure difference detectable by a sensor at a gas boiler, and associated gas boiler

A method for detecting faulty operation of a gas blower driven by an electronically commutated DC motor. The DC motor of the gas blower is controlled by an integrated electronic motor control circuit. The electrical current draw, required in operation to reach a predetermined blower speed of the gas blower, is measured. It is measured as a measured variable via the electronic motor control circuit. The electronic motor control circuit performs a plausibility check of the measured electrical current draw. The measured value of the electrical current draw, at a predetermined blower speed, is compared to a current draw reference value characteristic stored in the electronic motor control circuit. Thus, a warning and/or an error code is issued by the electronic motor control circuit. The warning is based on deviation of the measured value of the electrical current draw beyond a tolerance range around the reference characteristic.

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Wuppertal, Germany

Bernhard Simon