Gas burner safety circuit and method

Abstract

An electronic safety circuit (1) for controlling a gas supply (G) to a gas burner (2), comprising an electrically operable safety valve (3) for maintaining or stopping the gas supply (G) to the gas burner (2); a thermocouple (4) for receiving heat from the gas burner (2); a first and second semiconductor switch (5, 6). The safety valve (3) is connected to the thermocouple (4), and the first and second semiconductor switch (5, 6) are arranged in series and connected between the thermocouple (4) and the safety valve (3). A control circuit (7) is connected with the first and second semiconductor switch (5, 6) and configured to receive an input signal (S) based on which the control circuit (7) switches the first and second semiconductor switch (5, 6) to a closed state, or switch the first and / orthe second semiconductor switch (5, 6) to an open state. [Figure 1]