Automatic device for the ignition and control of a gas apparatus and relative driving method
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United States of America Patent
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-
Feb 28, 2012
Grant Date -
Feb 5, 2009
app pub date -
Oct 30, 2007
filing date -
Jul 31, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
An automatic system and method to provide the ignition and monitoring of a pilot flame for gas burners. The circuit includes a microcontroller that acts on at least one gas valve, a flame igniter, and a flame detector circuits. The valve driver is a switching circuit able to open the valve and keep it open with power saving. The flame detection uses the ionization principle with full use of the rectification property of a flame. Furthermore the flame detection is activated for reduced times to save power. The microcontroller governs the system according to the signals that it receives from points of the circuit. The system provides a circuit realizing advanced power saving techniques to provide also a long term operation on battery powered systems. In addition the automatic control can save gas resources versus traditional thermocouple based systems by applying the intermittent pilot ignition.
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