Premix combustion device of gas burner

摘要

A premix combustion device of a gas burner applicable to a domestic gas boiler or water heater is disclosed. The premix combustion device includes a gas mixture supply pipe to supply gas mixture to the gas burner, and a gas supply means and air supply means connected with the gas mixture supply pipe. A damper is provided at a predetermined position in the gas mixture supply pipe to regulate the amount of the gas mixture to be supplied to the gas burner, degree of opening of the damper is adjusted by an electrically operated valve controlled by a control signal from a controller, and an valve disc arranged to open and close the gas mixture supply pipe according to operation of the valve is provided with a plurality of holes. The premix combustion device extends the range of controllable combustion, ensuring supply of water at a set temperature.