Claims
- 1. Fuel burner control system comprising:
- valve means for controlling the flow of fuel to a burner;
- ignitor means for igniting fuel emanating from the burner, said ignitor means comprising first electrode means positioned in the flame provided by the ignited fuel;
- second electrode means spaced from said first electrode means in a zone occupied by the flame;
- start-up circuit means activatable to produce a given timed ignition period during which said igniter means is energized and an ignition signal is produced;
- flame sensing circuit means comprising ac source means for applying an ac voltage between said first and second electrode means, and detector means comprising primary energy storage means for storing energy carried by flame rectified current flow between said first and second electrode means and producing therewith an output signal, said sensing circuit means comprising reignition more comprising secondary energy storage means for storing energy carried by said flame rectified current and adapted to produce therewith a reignition signal after a loss thereof, said reignition signal being applied to said start-up circuit means and effective to activate a said ignition period thereby and wherein said application of said reignition signal substantially depletes the energy stored in said secondary energy storage means so as to prevent further attempts for ignition in the event that ignition does not occur during said ignition period; and
- valve control circuit means for opening said valve means in response to either said ignition or said output signal.
- 2. A system according to claim 1 wherein said primary energy storage means comprises primary capacitor means, said secondary energy storage means comprises secondary capacitor means, and said reignition signal is produced by a substantial discharge from said secondary capacitor means.
- 3. A system according to claim 1 wherein said second electrode means comprises the burner.
CROSS-REFERENCE TO RELATED APPLICATION
This invention is a division of U.S. application No. 06/070,164, now U.S. Pat. No. 4,298,335, filed Aug. 27, 1979, entitled "Fuel Burner Control Apparatus".
US Referenced Citations (7)
Divisions (1)
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Number |
Date |
Country |
Parent |
070164 |
Aug 1979 |
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