Gas appliance and control method thereof

A control method for a gas appliance, wherein the gas appliance includes a burner, a gas valve, an igniter, and a thermocouple;

• the burner includes at least one flame port;
• the gas valve is installed on a gas pipe communicating with the burner and is controlled to open or close the gas pipe;
• the igniter is adjacent to the at least one flame port of the burner and is controlled to ignite a fuel gas flowing out of the at least one flame port;
• and
• the thermocouple is adjacent to the burner, is adapted to detect a flame, and generates a detected voltage with respect to a detection period of time;
• comprising the following steps:
• A. controlling the igniter to ignite and controlling the gas valve to open, wherein step A is performed upon reception of a triggering signal;
• B. receiving the detected voltage generated by the thermocouple;
• C. controlling the igniter to stop igniting and keeping the gas valve open when the detected voltage reaches a first voltage value;
• D. receiving the detected voltage from the thermocouple continuously;
• and controlling the gas valve to close the gas pipe when the detected voltage above a second voltage value falls below the second voltage value, wherein the second voltage value is higher than the first voltage value;
• and
• after step D, when the detected voltage is above the first voltage value:
• controlling the igniter to ignite and controlling the gas valve to open the gas pipe upon reception of the triggering signal if the detected voltage has decreased for a predetermined period of time.