Patent ID: 6050807
Filing Date: 2000-04-18
Classification: F23N,Y10S

Abstract:
A method for controlling an amount of air of a gas boiler, said method comprising the steps of:monitoring a lifting occurrence of a flame by detecting a wave length of a flame from the gas boiler, by converting the detected wave length into a flame voltage signal of which value corresponds to the wave length and by comparing the value of the flame voltage signal with a reference flame voltage value;reading out a minimum rotative velocity of an air supplying fan for preventing a yellow flame occurrence, wherein the minimum rotative velocity corresponds to a presently-supplied gas amount when the lifting occurrence of the flame is monitored;detecting a present rotative velocity of the air supplying fan;comparing the present rotative velocity with the minimum rotative velocity; anddecreasing the present rotative velocity of the air supplying fan when the present rotative velocity is higher than the minimum rotative velocity to remove the lifting occurrence, otherwise maintaining the present rotative velocity of the air supplying fan.