JPS6419218A - Kerosine burner of open type - Google Patents

Abstract

PURPOSE:To provide a kerosine burner of open type which generates only a little odor when shutting off the burner by shifting, after the burner shutting off instruction is given, by means of a control device amounts of fuel supply and combustion air supply which have been in the most suitable state of combustion to an amount of combustion air supply which is a little excessive as given for low combustion and then shutting off the burner. CONSTITUTION:With a kerosine burner of open type a control device 10 shifts the amount of fuel supply to the minimum which is capable of maintaining combustion and shifts the amount of air supply for the fuel to an amount which corresponds to the minimum supply of the fuel plus DELTAQ after the burner shutting off instruction is given. When those shifts are finished, a pump 3 is stopped and the burner shut-off action is carried out. To make the supply of fuel minimum has two reasons; one is that the flame failure during the burner shutting-off occurs at a later time than during high combustion so that the amount of formed intermediate decomposed matters is smaller and the other is that due to the small absolute amount of the fuel gas the amount of formed intermediate decomposed matters is smaller. The reason to make the amount of the combustion air supply larger by DELTAQ than that corresponding to the amount of the minimum fuel supply is to raise the purging effect and make the amount of the fuel whose evaporation is delayed small.