BURNER UNIT

Abstract

Example embodiments relate to a burner unit for combusting an air-fuel mixture. The burner unit includes an air supply dome having recesses which have a larger width on an inside of the air supply dome than on an outside.

Claims

1. A burner unit for combusting an air-fuel mixture, comprising a combustion space, a combustion air guide dome and a fuel inlet, wherein the combustion air guide dome is located in the combustion space and has recesses, wherein the fuel inlet opens into the combustion space, and wherein the recesses have a larger width on an inside of the combustion air guide dome than on an outside of the combustion air guide dome.

2. The burner unit according to claim 1, wherein the recesses taper from the inside to the outside.

3. The burner unit according to claim 1, wherein the recesses are configured such that they produce a nozzle effect for air directed out of the combustion air guide dome.

4. The burner unit according to claim 1, wherein the recesses have a constant profile along a longitudinal axis of the combustion air guide dome-dome.

5. The burner unit according to claim 1, wherein the combustion air guide dome has a circular cylindrical shape.

6. The burner unit according to claim 1, wherein the recesses have a common height along a longitudinal axis of the combustion air guide dome.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In detail, there is a multitude of options for configuring and further developing the burner unit according to the invention. In this regard, reference is made, for one thing, to the claims dependent on claim 1 and, for another thing, to the following description of exemplary embodiments in conjunction with the drawings, in which:

[0016] FIG. 1 shows a section taken through a schematic representation of the burner unit along the longitudinal axis; and

[0017] FIG. 2 shows a section taken through the burner unit perpendicular to the longitudinal axis.

DETAILED DESCRIPTION

[0018] FIG. 1 schematically shows a burner unit 1, which is for example part of a heating system. A mixture of a fuel, e.g. gas or diesel, and combustion air is combusted in the burner space 2. Good mixing is required for a combustion which is as effective as possible and which also produces as few pollutants as possible. The combustion air enters the combustion space 2 via the recesses 4 in the combustion air guide dome 3. The recesses 4 are in the form of slots here, which originate from the inner face side of the combustion air guide dome 3 and extend along the longitudinal axis 6 of the burner unit 1 and here also of the combustion air guide dome 3. The shape of the recesses 4 is thus constant in the axial direction and the recesses 4 extend parallel to one another. In the configuration shown, the recesses 4 furthermore have a common height, that is, a common, i.e., equal, axial extent. The combustion air guide dome 4 is a cylinder having a circular base area. The fuel enters the combustion space 2 via a fuel inlet 5.

[0019] FIG. 2 shows a section taken through the combustion air guide dome 3 along the longitudinal axis 6. The recesses 4 can be seen, which extend from the inside 30 to the outside 31 and become narrower from the inside to the outside. The width of the recesses 4 is thus greater on the inside 30 than on the outside 31. This results in the effect of a nozzle.

LIST OF REFERENCE NUMBERS

[0020] 1 burner unit [0021] 2 combustion space [0022] 3 combustion air guide dome [0023] 4 recess [0024] 5 fuel inlet [0025] 6 longitudinal axis of combustion air guide dome [0026] 30 inside of combustion air guide dome [0027] 31 outside of combustion air guide dome