Abstract: A dual solenoid burner control system particularly adapted for a gas clothes dryer. A controlled switching element, such as a triac, is advantageously employed in a circuit arrangement which accomplishes the various operational functions required of such circuits, and which permits the use of single-winding solenoid gas valves and a simple single-pole sensing switch for sensing igniter ignition condition or flame heat. The preferred embodiments interrupt gas flow in the event of triac failure, whether open-circuited or short-circuited. In an additional system function, the change in winding impedance as a solenoid valve operates normally is sensed and advantageously utilized to cause the first valve to close in the event the second valve does not properly operate.

Abstract: An automatic clothes dryer having a gas heater assembly for heating the air includes a gas control valve and a gas nozzle in gas flow communication with the valve. The gas nozzle has an exit orifice having spaced therefrom a plate member such that gas will impinge the plate member. A combustion chamber having a truncated cone shaped upper portion and with an opening at the top and bottom thereof surrounds and is spaced outwardly of both the plate member and the nozzle. The bottom opening of the combustion chamber is arranged to allow air into the combustion chamber for mixing with the gas exiting the nozzle orifice. A hood member is spaced outwardly and below the opening at the top of the combustion chamber to allow ambient air into the hood member for mixing with the heated air. There is also provided an igniter for igniting the gas and air mixture.