Process and circuit for controlling a gas burner
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United States of America Patent
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Jul 20, 1999
Grant Date -
N/A
app pub date -
Oct 24, 1996
filing date -
Oct 25, 1995
priority date (Note) -
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Abstract
A process for controlling a gas blower burner in which 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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