EP1909028A2 - Gas power burner - Google Patents

Abstract

The invention relates to a gas fan burner, comprising a flame body (1) with a circular cylindrical surface (2), wherein the flame body (1) at one of its two end faces (3) is gas-tightly sealed and at the other, arranged on a burner support end face (4). a feed for a gas-air mixture to be combusted, wherein the lateral surface (2) is provided with a plurality of outlet openings (5) for the gas-air mixture and formed by a metallic wires (6), tightly lying burning surface ( 7) is enclosed. According to the invention it is provided that the focal surface (7) is formed of a wire mesh.

Description

The invention relates to a gas blower burner according to the preamble of patent claim 1.

Such a gas blower burner is in Handbook for Heating Technology (34th Edition, 2002, publisher: Buderus Heating Technology, ISBN 3-410-15283-0, page 242 ) under the name Logatop®. This consists of a flame body with a circular cylindrical surface, wherein the flame body is closed at one of its two end faces and at the other, arranged on a burner support end face a supply for a gas-air mixture to be burned. In this case, the lateral surface is provided with a plurality of outlet openings for the gas-air mixture and enclosed by a formed of metallic wires, tightly or closely resting focal surface.

The function of such a burner is well known and should therefore be briefly explained at this point: via the feed arranged on one end side, the gas-air mixture to be combusted is conveyed into the interior of the flame body. From there it passes through the outlet openings to the burning surface and is burned there. In this case, the lateral surface is formed as a perforated plate, on which rests the actual, formed of wires burning surface.

This focal surface is formed in the aforementioned burner as a wire mesh. In such a knitted fabric, the distances of the wires from each other are uneven, d. H. the mesh size varies from wire to wire. Overall, one can also speak of a confused arrangement of the relatively thin wires.

Wire knits for the stated purpose are relatively expensive. In addition, they have the disadvantage that they easily lose mechanical strength due to the relatively thin wires and the uneven distribution thereof, thus possibly resulting durability problems.

The invention has for its object to improve a gas blower burner of the type mentioned above with respect to the disadvantages of the prior art.

This object is achieved with a gas blower burner of the type mentioned by the features listed in the characterizing part of patent claim 1.

According to the invention, it is thus provided that the focal surface is formed from a wire mesh.

To understand the invention, it is essential to understand the difference between a wire mesh and a wire mesh. As already mentioned, knitted fabrics are characterized by the fact that the distribution of the wires is uneven, thus resulting in no uniform mesh size. In the case of wire mesh, which are generally cheaper than knitwear, on the other hand, the arrangement of the warp and weft threads crossed at right angles to one another is very regular. This regularity leads to a well-defined focal area, the durability of which can be accurately predicted. Also, the thermodynamic conditions relating to the combustion process on such a focal surface can be predicted much better. At relatively low production costs, therefore, thus results in a fuel surface at which the combustion proceeds under optimal, exactly predictable conditions.

Other advantageous developments emerge from the dependent claims.

The gas blower burner according to the invention including its advantageous developments according to the dependent claims will be explained in more detail with reference to the drawing of a preferred embodiment.

Figur 1

im Schnitt von der Seite den Gasgebläsebrenner (einschließlich Ausschnittsvergrößerung der Brennerfläche);

Figur 2

in Vorderansicht den Brenner gemäß Figur 1;

Figur 3

die kreiszylindrisch aufgewickelte, aus Drahtgewebe bestehende Brennerfläche;

Figur 4

in Draufsicht den abgewickelten Zuschnitt der Brennerfläche;

Figur 5

in Draufsicht ein bevorzugtes Schnittmuster zur Bereitstellung der Brennerfläche aus Drahtgewebe; und

Figur 6

ein weniger günstiger Zuschnitt zur Herstellung der Brennerfläche.

It shows

FIG. 1

in the section from the side of the gas blower burner (including enlarged detail of the burner surface);

FIG. 2

in front view of the burner of Figure 1;

FIG. 3

the circular cylindrical wound, consisting of wire mesh burner surface;

FIG. 4

in plan view, the developed blank of the burner surface;

FIG. 5

in plan view, a preferred cutting pattern for providing the burner surface of wire mesh; and

FIG. 6

a less favorable blank for making the burner surface.

The overall construction of the gas blower burner according to the invention results, in particular, from FIGS. 1 and 2. Thereafter, the gas blower burner consists of a flame body 1 with a circular cylindrical outer surface 2 in a manner known per se. As can be seen from the detail enlargement in FIG. 1, the lateral surface 2 is provided with a large number provided by outlet openings 5 for the gas-air mixture. Typically, the entire lateral surface 2 is provided with such openings arranged at regular intervals, so that a flame can burn on the entire outer surface of the flame body 1. In order for the flame to adhere to the flame body 1, the jacket surface 2 is surrounded by a thin surface (distance equal to zero) of the focal surface 7 formed by metallic wires 6.

The flame body 1 itself is in a conventional manner at one of its two end faces 3 (gas-tight if necessary) closed and has at the other, arranged on a burner support 13 end 4 a supply for a gas-air mixture to be burned.

Essential for the gas fan burner according to the invention is now that the focal surface 7 is formed of a wire mesh.

As mentioned above, the burning surface is thus not designed as a so-called knitted fabric in particular. Rather, the use of a fabric provides significantly improved flame stabilization and also improved durability. As a type of fabric for the wire mesh is in particular the so-called linen weave (also called cloth weave: warp and weft each other at right angles) provided, which represents the simplest way of weaving a fabric and has the closest intertwining of warp and weft. It is provided in particular that the wire mesh consists of warp and weft threads, which are each arranged obliquely (preferably 45 °) extending to the cylinder axis of the flame body.

A particularly preferred development of the gas blower burner according to the invention is provided with regard to the blank of the wire mesh. With reference to Figures 4 and 5, namely, the wire fabric in the unwound state a parallelogram (typical properties of the parallelogram: opposite sides are parallel, opposite sides are the same length, opposite angles are the same size, two adjacent angles result in 180 °, bisecting the diagonal cut each other), wherein a part of the wires 6 is parallel to two opposite sides or edges of the Parallelogrammzuschnitt.

According to the invention, therefore, it is not intended in particular to use a rectangular wire mesh blank which, as shown in FIG. 6, would lead to a rather large waste during targeted oblique arrangement of warp and weft on the basis of a wire cloth web having a specific width B.

Rather, it is preferably provided (see FIG. 5) that the wire cloths (for a plurality of burners according to the invention) are made as parallelogram blanks from a continuous wire web having a defined width B, wherein two opposite sides of the wire cloth each have an outer edge of the wire cloth web and the two other opposite sides in each case form a cutting edge for each next parallelogram blank. - Except for a start and an end piece of this manufacturing process leads to a particularly good utilization of the starting material, so the wire fabric web.

With regard to the wire mesh finally finally particularly preferably provided that the Parallelogrammzuschnitt enclosing the lateral surface 2 overlapping, resulting in a strip-shaped overlap region 8 (see Figure 3), neither parallel nor perpendicular (ie preferably obliquely, particularly preferably at 45 °) to the longitudinal axis of Lateral surface 2 extends. This requirement preserves the burner surface particularly well against heat-induced distortions of the tissue, since possible strains and shrinkages can be distributed uniformly in the axial and circumferential directions. In particularly powerful and therefore large burners can be provided that the overlap region 8 is fixed with small weld points on the lateral surface 2.

Again, with reference to Figure 1 is provided in the illustrated preferred embodiment that the closure on the one end face 3 of the flame body 1, a cover-shaped element 9 is arranged. This has a cylindrical peripheral edge 10, which encloses the wire mesh-carrying lateral surface 2. To connect the components is also particularly preferably provided (because manufacturing technology easy) that the peripheral edge 10, the wire mesh and the lateral surface 2 (in this arrangement order) are connected to each other by pressure ("pressure joining" is called in the jargon also "clinching" or " Clinching ": this is a procedure for joining sheets without Use of a filler material; one can count on both the joining process and the forming process, since the compound is achieved by forming the material).

In order to redirect as much as possible the gas-air mixture flowing axially parallel to the cylinder jacket surface of the flame body 1 via the feed on the one face 4, it is further provided that the lid-shaped element 9 has centrally a bulge 11 pointing into the interior of the flame body 1. This can, as shown, be formed dome-like with a slight curvature.

As finally shown again in FIG. 1, the mixture feed already mentioned above is formed on the end face 4 of the flame body 1 as a cylindrical support tube 12 fastened to the burner carrier 13. This encloses - as the peripheral edge 10 on the lid-shaped element 9 - the outer surface carrying the wire mesh 2, which is also provided here, that the support tube 12, the wire mesh and the lateral surface 2 (again in this arrangement order) are connected to each other by pressure.

LIST OF REFERENCE NUMBERS

1

gauze assembly

2

lateral surface

3

front

4

front

5

outlet opening

6

wire

7

burning surface

8th

overlap area

9

lid-shaped element

10

circumferential edge

11

bulge

12

support tube

13

torch carrier

B

Width of the wire mesh

Claims (14)

Gas blower burner, comprising a flame body (1) with a circular cylindrical surface (2), wherein the flame body (1) at one of its two end faces (3) is closed and at the other, arranged on a burner support end face (4) a supply for a to having combusting gas-air mixture, wherein the lateral surface (2) provided with a plurality of outlet openings (5) for the gas-air mixture and by a metallic wires (6) formed, tightly disposed focal surface (7) is enclosed,
characterized,
that the internal surface (7) is formed from a wire mesh. Gas blower burner according to claim 1,
characterized,
that the wire mesh consists of warp and weft threads, which are each arranged obliquely to the cylinder axis of the flame body (1). Gas blower burner according to claim 1 or 2,
characterized,
that the wire fabric in the developed state has a parallelogram-shaped blank. Gas fan burner according to one of claims 1 to 3,
characterized,
that part of the wires (6) to two opposite sides of the Parallelogrammzuschnitts parallel. Gas fan burner according to claim 3 or 4,
characterized,
that the Parallelogrammzuschnitt of the wire mesh, the outer surface (2) overlapping encloses, wherein a strip-shaped Overlap area (8) results, which is neither parallel nor perpendicular to the longitudinal axis of the lateral surface (2). Gas blower burner according to one of claims 1 to 5,
characterized ,
that the wire mesh is formed as a linen weave. Gas fan burner according to one of claims 1 to 6,
characterized,
in that a cover-shaped element (9) is provided on the one end face (3) of the flame body (1) for the gastight seal. Gas fan burner according to claim 7,
characterized,
in that the cover-shaped element (9) has a cylindrical peripheral edge (10) which encloses the lateral surface (2) carrying the wire mesh. Gas fan burner according to claim 8,
characterized ,
that the peripheral edge (10), the wire mesh and the lateral surface (2) are connected to each other by pressure. Gas fan burner according to claim 7,
characterized,
in that the cover-shaped element (9) has centrally a bulge (11) pointing into the interior of the flame body (1) for the flow deflection of the gas-air mixture. Gas blower burner according to one of claims 1 to 10,
characterized,
in that a cylindrical carrier tube (12) is provided on the other, mixture feed side end face (4) of the flame body (1). Gas fan burner according to claim 11,
characterized,
that the carrier tube (12) encloses the wire cloth supporting surface (2). Gas blower burner according to claim 11 or 12,
characterized,
in that the carrier tube (12), the wire mesh and the lateral surface (2) are connected to one another in a pressurized manner. Process for the production of wire fabrics for gas fan burners according to one of claims 1 to 13,
characterized,
that the wire mesh as Parallelogrammzuschnitte low-cut from a continuous, a defined width (B) having wire fabric web are created, wherein two opposite sides of the wire fabric each form an outer edge of the wire fabric web and the other two opposite sides each have a cut edge for each next Parallelogrammzuschnitt.

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