Fuel fired burners
AssigneeBritish Gas Corporation
InventorRoland Vincent Horatio Palmer-Jones
Life of this patent
Estimating the term…
Abstract
A fuel fired burner is provided for receiving a premixture of fuel and air. A ceramic flame support extends across the burner chamber and has a plurality of elongate slots through which the fuel and air flows. Each slot has a narrow constant dimension portion that opens into a wider constant dimension portion. The outlet end of the latter portion opens into a short diverging outlet. The arrangement is such that when the burner is operating within a given heat output range, the burner flame can move between the upstream and downstream ends of the diverging outlet to seek stabilization as the heat output changes within that range, without retracting into the slot upstream of the outlet.
Claims18
A fuel fired burner, comprising:
- a chamber receiving a premixture of fuel and air, and
- a flame support extending across the chamber and having a plurality of elongate through slots, each slot having a portion of relatively narrow substantially constant dimension which opens, in a downstream direction, into a portion of relatively wide substantially constant dimension, wherein a downstream end of each relatively wide substantially constant dimension portion opens into a short diverging outlet which forms a downstream end portion of an associated slot, said diverging outlet being outwardly tapered, a length dimension of the diverging outlet being such that when the burner is operating within a given heat output range for the burner, the burner flame is movable between upstream and downstream ends of the outlet to seek stabilization as heat output changes with said range, without retracting the burner flame into the slot upstream of the diverging outlet.
A flame support for use in a fuel fired burner, which flame support comprises:
- a plurality of elongate through slots, each slot having a portion of relatively narrow substantially constant dimension which opens, in a downstream direction, into a portion of relatively wide substantially constant dimension, wherein a downstream end of each relatively wide substantially constant dimension portion opens into a short diverging outlet which forms a downstream end portion of an associated slot, said diverging outlet being outwardly tapered, and a length of dimension of the diverging outlet being such that when the flame support is incorporated in the burner and the burner is operating within a given heat output range for the burner, the burner flame is movable between upstream and downstream ends of the outlet to seek stabilization as heat output changes within said given range, without the burner flame retracting into a slot upstream of the diverging outlet.
Dependencies are inferred from the claim text.