Back to results
US 4,364,724 AGranted
Method and apparatus for dosing an air-fuel mixture in burners having evaporating tubes
AssigneeForenade Farbiksverken
InventorJan A. Alpkvist
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeForenade Farbiksverken
InventorJan A. Alpkvist
Estimating the term…
A method and an apparatus for dosing the air-fuel mixture in burners of the type which is formed with an evaporator tube (9) through which fuel and some amount of combustion air is introduced in the combustion chamber (1) and in said combustion chamber is mixed with further combustion air and is inflamed. The optimum amount of combustion air is determined for different amounts of fuel and for different reference temperatures in a predetermined point of the evaporator tube (9) adjacent the mouth (10) thereof in the combustion chamber (1), and the temperature of the air-fuel mixture is measured by means of a thermo element (41) in the said point of the evaporator tube (9). In an electronic unit (34) the actual temperature is compared with the predetermined reference temperature for a given amount of injected fuel, and in case of an actual temperature below or above respectively the reference temperature the amount of combustion air is reduced or increased respectively by means of a control means in proportion to the measured temperature difference until the actual temperature has increased or dropped respectively to the reference temperature, what follows according to a programmed curve.
Method of dosing the air-fuel mixture in burners of the type which is formed with an evaporator tube through which fuel and some amount of combustion air is introduced in the combustion chamber and is mixed in said chamber with further combustion air and is inflamed, characterized in that the optimum amount of combustion air is determined for different types of fuel and different reference temperatures in a predetermined point of the evaporator tube adjacent the mouth thereof in the combustion chamber, and the temperature of the air-fuel mixture is measured in the said point of the evaporator tube and the actual temperature is compared with a predetermined reference temperature at a given amount of injected fluid, and for an actual temperature below and above respectively the reference temperature the amount of combustion air is reduced and increased respectively in proportion to the measured temperature difference until the actual temperature has increased and dropped respectively to the reference temperature, whereby the burner in the combustion chamber gets the predetermined optimum amount of combustion air.
Apparatus for dosing the air-fuel mixture in burners having a combustion chamber, in which an evaporator tubes opens and in which a little amount of combustion air is supplied to the evaporator tube and is mixed with the fuel whereas the remaining portion of combustion air is supplied through the bottom of the combustion chamber and in which both the amount of injected fuel and the amount of combustion air can be controlled, characterized in that a thermo element is mounted inside the evaporator tube at a place thereof located inside the combustion chamber, and the said thermo element is connected to an electronic unit to which also the control means for fuel and combustion air are connected and which can be programmed for an optimum relationship combustion air to fuel and which gives an exact dosing of combustion air-fuel mixture according to a predetermined programmed curve.
Dependencies are inferred from the claim text.