Premix combustion device of gas burner

Abstract

A premix combustion device of a gas burner applicable to a domestic gas boiler or water heater, includes a gas mixture supply pipe to supply gas mixture to the gas burner, and a gas supply and an air supply 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, the degree of opening of the damper is adjusted by an electrically operated valve controlled by a control signal from a controller, and a 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 invention claimed is: 
     
         1 . A premix combustion device of a gas burner applicable to a domestic gas boiler or water heater, comprising:
 a gas mixture supply pipe to supply a gas mixture to the gas burner; and   a gas supply and air supply connected with the gas mixture supply pipe, wherein a damper is provided at a predetermined position in the gas mixture supply pipe to regulate an amount of the gas mixture to be supplied to the gas burner.   
     
     
         2 . The premix combustion device according to  claim 1 , wherein a degree of opening of the damper is adjusted by an electrical valve operated by a control signal from a controller, and wherein a valve disc is configured to open and close the gas mixture supply pipe according to the adjustment of the electrical valve, and wherein the valve disc includes a plurality of holes. 
     
     
         3 . The premix combustion device according to  claim 1 , wherein a degree of opening of the damper is adjusted by a pressure valve having a valve disc selectively positioned by a spring according to a fluid pressure provided by the air supply, and wherein the valve disc is configured to open and close the gas mixture supply pipe according to the adjustment of the pressure valve, and wherein the valve disc includes a plurality of holes.