Metal burner membrane

Abstract

The invention relates to a gas burner comprising a metal burner membrane having a base section (201), a dosing section (203) and a transition region in between (202). The shape of the membrane is such that the smallest radius of curvature of the transition zone is smaller than the smallest radius of curvature of the base section. Furthermore the burner membrane uninterruptedly flows over from the base section through the transition region into the closing section. The advantages of such a gas bunner am amongst others a large dynamic power range, an improvadflame front and a low production cost.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a gas burner comprising a metal burner membrane. BACKGROUND OF THE INVENTION [0002] Prior art gas burners with different shapes and different burner membranes have been described e.g. in WO 02 / 44618 A1 and WO 01 / 79756 A1. [0003] The first drawback of these burners is that for a given dimension, they do not allow for a large range in output power at low power, i.e. if the gasflow is low, there is a risk for flame extinguishment, and at high powers, i.e. if the gasflow is high, there is a risk that the flame blows off. This results in the need of a range of burners that differ only slightly in dimensions (e.g. in their height) adapted to specific power ratings: a second drawback. [0004] A third drawback of these burners is that different parts have to be punched, formed and welded together which leads to expensive burners. The welding seams themselves are weak points in the burner, because they are most susceptible to fail...

AI Technical Summary

Benefits of technology

[0005] It is a general object of the present invention to eliminate the drawbacks of the prior art burners. It is a first object of the present invention to provide a burner with an increased range in output power. It is a second object of the present invention to provide a burner with an increased lifetime. It is a third object of the present invention to provide a burner with a reduced production cost. It is a fourth object of the present invention to provide a burner with an improved flame distribution.

Problems solved by technology

The first drawback of these burners is that for a given dimension, they do not allow for a large range in output power at low power, i.e. if the gasflow is low, there is a risk for flame extinguishment, and at high powers, i.e. if the gasflow is high, there is a risk that the flame blows off.

This results in the need of a range of burners that differ only slightly in dimensions (e.g. in their height) adapted to specific power ratings: a second drawback.

A third drawback of these burners is that different parts have to be punched, formed and welded together which leads to expensive burners.

The welding seams themselves are weak points in the burner, because they are most susceptible to failure in the heating and cooling cycles that occur during the use of a gas burner.

Hence, the weldings reduce the lifetime of the product, which constitutes a fourth drawback.

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