PROCESS AND CIRCUIT FOR CONTROLLING A GAS BURNER

摘要

In a process for controlling a gas blower burner, an ionization electrode sends an electrical variable derived from the combustion temperature or the lambda val ue to a control circuit, which compares this variable with a selected electrical se t point and adjusts the gas-to-air ratio (lambda value) to a corresponding lambda set point. To compensate the effect of a condition-dependent change in the proportionality bet ween the lambda value and the electrical measured variable derived from it on the con trol in such a way that the desired lambda set point will be maintained, a calibratio n cycle is run from time to time. The lambda value is reduced from a value of > 1 during this cycle. The maximum obtained at lambda = 1 is stored. The electrical set point is adjusted with this maximum.