GAS SAFETY SHUTOFF

摘要

A system for igniting a grill can include a solenoid valve, a flame rectification sensor, an igniter, and a control circuit connected to the solenoid valve and the flame rectification sensor. The solenoid valve controls flow of gas to the grill's burner and includes a switch that closes when a handle connected to the switch opens the solenoid valve. The control circuit sends current to the solenoid valve when the switch is closed to hold the solenoid valve open. After the switch closes, the igniter is ignited. After ignition, the control circuit monitors the presence of a flame with a flame rectification sensor. If no flame is detected after a certain amount of time, the control circuit stops sending current to the solenoid valve to close the solenoid valve.

主权项

1. A system for igniting a grill, the system comprising:
a solenoid valve comprising a switch and a handle, the switch actuated by manipulation of the handle, the solenoid valve configured to be held open by a current; a flame rectification sensor configured to change a flame detection signal, an igniter; and a control circuit electrically coupled to the solenoid valve, the switch, and the flame rectification sensor, the control circuit configured to selectively send the current to the solenoid valve when the switch is closed, to determine presence of a flame based on the change to the flame detection signal, and to close the solenoid valve when the control circuit does not detect the presence of a flame after an ignition of the igniter.