Process and circuit for controlling a gas burner

Details Process and circuit for controlling a gas burner Process and circuit for controlling a gas burner

F - Mech Eng,Light,Heat,Weapons

23

N

F23N 5/12 (2006.01) F23N 1/02 (2006.01)

Patent

CA 2188616

In a process for controlling a gas blower burner, an ionization electrode sends an electrical variable derived from the combustion temperature or the lambda value to a control circuit, which compares this variable with a selected electrical set 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 between the lambda value and the electrical measured variable derived from it on the control in such a way that the desired lambda set point will be maintained, a calibration 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.

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