| 摘要 |
The system ( 1 ) for controlling the combustion ( 7 ) of a cooking oven burner ( 2 ), comprises in combination a thermostat valve ( 3 ) with a rotary hand knob ( 4 ) and a non-electric temperature sensor ( 6 ) for modulating the burner flame ( 7 ), and an electromagnetic safety valve kept open for ignition, and a electronic module ( 10 ) supplying in a first moment a DC power supply to the safety valve ( 8 ), which is then maintained open by a thermocouple ( 9 ) heated by the main flame ( 7 ). A common electrode ( 18 ) is provided both for electronic flame detection and ignition. During the burner pre-ignition step, the absence of flame detection signal (If) permits the gas flow (G) to be cut off after a short timed interval, irrespective of the thermocouple response. In the event of the AC power supply being cut off, the thermocouple ( 9 ) and the thermostat valve ( 3 ) keep the burner modulated independently.
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