Burners

Description

AREA OF INVENTION

[0001] The invention relates to a burner for a gas torch for illuminating open areas, in particular terraces or beer gardens, and / or for providing heat outdoors, which burner extends along a longitudinal axis and comprises a burner tube with at least one ventilation opening extending transversely to the longitudinal axis. STATE OF THE ART

[0002] Gas flares or gas burners are used – in addition to their use in industry for flaring flammable gases that are not used for energy or material purposes – in tourism, especially in the hotel industry, as elegant lighting elements for outdoor areas such as terraces and gardens, as well as heat sources.

[0003] The operation of gas flares in tourism is typically event-driven and therefore time-limited. In particular, gas flares are used for lighting during the evening hours and / or for heating during the colder months. Comparatively short operating phases are thus generally interrupted by longer periods of inactivity.

[0004] Due to the outdoor location of the gas flares, they are exposed to the elements, particularly precipitation in the form of rain, snow, meltwater, and / or spray. This means that rainwater can penetrate the gas flare, especially into a gas nozzle.

[0005] A disadvantage of gas flares known from the prior art is that the ingress of rainwater into the burner, particularly into the gas nozzle, leads to corrosion and malfunctions. For this reason, these gas flares must be enclosed, i.e., a hood or roof must be installed above the flame, and they must be regularly maintained by specially trained personnel. This significantly limits design options and also generates ongoing additional costs.

[0006] Therefore, gas flares known from the state of the art are often dismantled and stored in a rain-protected manner, especially during downtime and / or in the event of precipitation.

[0007] Furthermore, gas flares that are not operational or have failed due to rainwater damage must be made functional again by replacing the damaged components, which is why corresponding replacement components or reserves must be stored and a corresponding work effort is necessary.

[0008] US 5,447,427 A relates to a burner for burning a gas in petrochemical plants, oil refineries and ironworks, comprising a mixing chamber, a feed chamber and a partition arranged between the chambers.

[0009] CN 104 266 189 B discloses a burner for low calorific value gases, comprising a combustion chamber with air distribution holes and a gas nozzle with outlet openings.

[0010] US 2024 / 044488 A1 describes a burner for a heating appliance, comprising an inner tube and an outer tube, each with radial openings.

[0011] US 2012 / 258412 A1 reveals a flare with automatic flame ignition. TASK OF INVENTION

[0012] The object of the present invention is therefore to provide a burner for a gas flare that overcomes the disadvantages of the prior art. In particular, the burner should ensure continuous and trouble-free operation of the gas flare despite rainwater. PRESENTATION OF THE INVENTION

[0013] This problem is solved by a burner according to claim 1.

[0014] In addition to the burner tube, the burner according to the invention has a gas distribution element, wherein both the burner tube and the gas distribution element extend substantially along the longitudinal axis.

[0015] In the context of the present invention, an operating state is understood to be any state of the gas flare, in particular the burner, in which the gas flare, in particular the burner, is arranged in the open air, regardless of whether gas flows through the burner or not - i.e., regardless of whether a flame is generated or not.

[0016] Both the burner tube and the gas distribution element are elongated hollow bodies.

[0017] Viewed in the direction of gas flow, the burner tube is arranged at least partially downstream of the gas distribution element. Preferably, the base body of the gas distribution element is arranged partially inside the burner tube.

[0018] It is conceivable that the burner tube and the gas distribution element could be screwed together. For this purpose, the burner tube could have an internal thread and the gas distribution element a corresponding external thread.

[0019] The burner tube and the gas distribution element are fluidically connected, i.e., it is ensured that gas can flow from the gas distribution element into or pass through the burner tube.

[0020] Both the burner tube and the gas distribution element, in particular the tubular base body, can have any cross-sectional shape, for example a polygonal cross-sectional shape, a quadrilateral cross-sectional shape, a triangular cross-sectional shape and / or a round cross-sectional shape. Preferably, the burner tube and / or the gas distribution element has a round cross-sectional shape at least partially; more preferably, the burner tube and / or the gas distribution element has a round cross-sectional shape.

[0021] Due to the orientation of at least one gas outlet opening transversely to the longitudinal axis, it is ensured that rainwater cannot substantially enter the gas distribution element, thus significantly reducing malfunctions and corrosion within the gas distribution element compared to the prior art. This means that for gas flares comprising a burner according to the invention, which are arranged outdoors and have no roof, smooth operation is ensured despite rainwater. As a result, regular maintenance is eliminated, and the gas flare can be operated much more economically and reliably.

[0022] The at least one gas outlet opening preferably has a cross-section that is essentially constant along a longitudinal extent of the gas outlet opening.

[0023] To ensure the drainage of rainwater during operation, one embodiment of the invention provides that the gas distribution element, in particular the base body, projects section by section into the burner tube such that the at least one gas outlet opening is located at least at the same height, preferably downstream, as the at least one ventilation opening when viewed in the direction of gas flow. Thus, rainwater that has entered the burner tube can escape or drain away without causing damage through the at least one ventilation opening. This means that, even during heavy rainfall, essentially no rainwater accumulates inside the burner tube.

[0024] The at least one gas outlet opening is arranged at at least the same height as the at least one vent opening when viewed in the direction of gas flow. Specifically, this means that the gas distribution element, in particular the base body, projects section by section into the burner tube such that a first plane, arranged perpendicular to the longitudinal axis and containing a first point of the at least one gas outlet opening (viewed in the direction of gas flow), is located at at least the same height (viewed in the direction of gas flow), preferably downstream, as a second plane, arranged perpendicular to the longitudinal axis and containing a first point of the at least one vent opening (viewed in the direction of gas flow).

[0025] If the at least one gas outlet opening and the at least one ventilation opening are arranged at the same height when viewed in the direction of gas flow, and if the at least one gas outlet opening and the at least one ventilation opening are arranged at least section by section one behind the other when viewed in a direction perpendicular to the longitudinal axis, then the at least one gas outlet opening and the at least one ventilation opening overlap at least section by section when viewed in this direction.

[0026] If the at least one gas outlet opening and the at least one ventilation opening are not arranged at least sectionally one behind the other when viewed in the direction perpendicular to the longitudinal axis, then there is no overlap of these at least two openings when viewed in this direction, even though the at least one gas outlet opening and the at least one ventilation opening are arranged at the same height when viewed in the direction of gas flow.

[0027] To keep rainwater away from the at least one gas outlet opening as effectively as possible, the at least one gas outlet opening is preferably arranged, at least partially, downstream of the at least one ventilation opening when viewed in the direction of gas flow. Particularly preferably, the at least one gas outlet opening is arranged completely downstream of the at least one ventilation opening when viewed in the direction of gas flow.

[0028] Preferably, the at least one ventilation opening, in particular a cross-sectional area of ​​the at least one ventilation opening, is larger than the at least one gas outlet opening, in particular a cross-sectional area of ​​the at least one gas outlet opening.

[0029] In order to keep rainwater, especially falling rainwater, essentially completely away from the at least one gas outlet opening, the invention provides that the gas distribution element has a cover which Viewed in the direction of gas flow, downstream of which at least one gas outlet opening is located, extends transversely to the longitudinal axis and protrudes beyond the base body.

[0030] Preferably, the cover is arranged at a rear end of the gas distribution element when viewed in the direction of gas flow.

[0031] The cover can project completely or partially beyond the base body. Preferably, along the longitudinal axis (in the direction of gas flow), the cover projecting beyond the base body is arranged at least behind the at least one gas outlet opening, thereby preventing rainwater from entering the at least one gas outlet opening.

[0032] Preferably, the cover extends in a normal plane arranged perpendicular to the longitudinal axis. This means the cover can be designed as a flat disc that is essentially horizontal during operation. This is particularly advantageous because the flat disc atomizes the rainwater, ensuring that the gas can flow essentially unimpeded in the burner tube despite the rainwater, since the rainwater does not flow in a stream or surge but rather in a fine mist or droplet form. Thus, despite precipitation or rainwater, an essentially unimpeded gas flow is possible.

[0033] To control the drainage of rainwater, a further embodiment of the invention provides that the cover, on the side facing the upstream gas outlet opening, has a groove in the area projecting beyond the base body to ensure controlled dripping of rainwater. That is, the area of ​​the cover projecting beyond the base body has the groove on its underside, whereby the groove can be milled into the cover and, in the case of a cover projecting completely beyond the base body, is preferably circular.

[0034] The groove acts as a drip edge or water nose, ensuring that rainwater entering the burner from above during operation drips off in a targeted manner and does not enter at least one gas outlet opening and subsequently the gas distribution element.

[0035] In order to ensure that the burner according to the invention is not susceptible to corrosion, a further embodiment of the invention provides that the gas distribution element and the burner tube are each turned parts made of brass.

[0036] Besides its good workability, brass is extremely resistant to corrosion, which is why this material is ideally suited for outdoor use - while also being easy to machine and shape.

[0037] In order to be able to adjust the flame color and / or the flame height, which may vary depending on the type of gas used, a further embodiment of the invention provides that the burner includes an air mixing element that surrounds the burner tube at least partially, and which air mixing element is arranged on the burner tube in a manner displaceable along the longitudinal axis and / or along a circumferential direction in order to be able to cover or uncover at least partially the at least one ventilation opening.

[0038] Depending on the position of the air admixture element, i.e., depending on how much of the at least one ventilation opening is covered, the flame pattern changes, in particular the color of the flame (from blue to yellow-orange) and / or the height of the flame.

[0039] If the air mixing element fully opens at least one ventilation opening, then the burner will produce a maximum flame height. This means that the air mixing element allows the flame, in particular its height and color, to be regulated and adjusted.

[0040] The more of at least one ventilation opening is covered (depending on the type of gas), the bluer the flame appears. If at least one ventilation opening is essentially completely unobstructed, a yellow-orange flame can develop.

[0041] In a further embodiment of the invention, it is provided that the burner comprises a gas disk arranged transversely, preferably at right angles to the longitudinal axis, in the direction of gas flow downstream from the at least one gas outlet opening and from the at least one ventilation opening in the burner tube, with several bores arranged at least partially parallel to the longitudinal axis for distributing the air-gas mixture.

[0042] With a regular arrangement of the bores, the gas disc can therefore serve to ensure a particularly even distribution of the air-gas mixture.

[0043] The shape of the flame can be influenced by means of the gas disc, in particular by means of the holes.

[0044] Preferably, the gas disc is made of stainless steel, which means that it not only withstands optimally high temperatures but also has no susceptibility to corrosion.

[0045] In a further embodiment, the bores are at least partially designed as elongated holes. Preferably, the elongated holes are arranged in a circular ring and follow a mean circular ring diameter.

[0046] Surprisingly, the elongated holes prevent the gas disc from becoming clogged with rainwater. With small-diameter holes, rainwater, especially raindrops, can be prevented from passing through due to high surface tension, thus preventing the burner from igniting because no gas can flow through the gas disc. Due to the correspondingly larger surface area and volume of the elongated holes, rainwater flows or drips through them easily, without causing any blockages.

[0047] In addition to the elongated holes, the gas disc can of course also have other holes, especially round holes, which may have a smaller surface area or volume than the elongated holes. Even with other holes present, the elongated holes ensure that the burner can be ignited despite rainwater.

[0048] The elongated holes can be arranged in a circular pattern within the ring. The longitudinal sides of the elongated holes can be essentially parallel to each other. The longitudinal sides can be straight or curved.

[0049] If the gas disk is round, then the outer diameter of the ring preferably coincides with the diameter of the gas disk. That is, the ring is then located in an outer region of the gas disk.

[0050] Preferably, each elongated hole has a length between 6 mm and 8 mm, preferably approximately 7 mm, and a width between 1 mm and 3 mm, preferably approximately 2 mm.

[0051] To ensure an unimpeded gas outflow from the gas distribution element into the burner tube, a further embodiment of the invention provides that the longitudinal axis of the burner and a longitudinal axis of the at least one gas outlet opening enclose an angle of 35° to 55°, preferably 40° to 50°, and particularly preferably 43° to 47°. The at least one gas outlet opening arranged in this angle (range) ensures that no turbulence of the gas occurs and that the gas can pass uniformly, and in particular substantially laminarly, from the gas distribution element into the burner tube.

[0052] In order to achieve an optimal flame using the burner according to the invention, a further embodiment provides that the gas distribution element has four gas outlet openings evenly distributed around the circumference of the base body and the burner tube has four ventilation openings evenly distributed around the circumference of the burner tube, wherein the four gas outlet openings are arranged at the same height in the direction of gas flow and the four ventilation openings are arranged at the same height in the direction of gas flow.

[0053] This arrangement ensures, on the one hand, that sufficient air reaches the gas, especially the flame, and on the other hand, that the gas flows as evenly as possible from the gas distribution element into the burner tube.

[0054] Furthermore, the presence of four ventilation openings evenly spaced around the circumference of the burner tube ensures that rainwater can be optimally drained from the burner.

[0055] In particular, it is possible that the inner diameter of the base body of the gas distribution element corresponds to the sum of the diameters of the four gas outlet openings. That is, the cross-section of the inner base body (total cross-section minus wall cross-section) is essentially equal to the sum of the four cross-sections of the gas outlet openings. Thus, there is no cross-sectional narrowing of the inner base body with respect to the four gas outlet openings.

[0056] Preferably, all gas outlet openings have a cross-sectional area that is essentially constant over the longitudinal extent of the gas outlet openings.

[0057] According to the above, a gas torch is further provided according to the invention for illuminating open areas, in particular terraces or beer gardens, and / or for providing heat outdoors, wherein the gas torch comprises a burner according to the invention, the burner is connectable to a gas source, and a flame can be generated by burning a gaseous fuel from the gas source.

[0058] A further disadvantage of gas flares known from the prior art is that they cannot be operated with different types of gas, since changing the gas type usually also requires replacing the gas nozzle to ensure that the required gas pressure is present for a desired flame height. Therefore, in a further embodiment of the invention, the gas flare is provided to include a regulating valve fluidically connected to the gas distribution element.

[0059] The gas pressure can be adjusted using the regulating valve. Therefore, the gas flare according to the invention can be operated with all types of combustible gas, such as propane, butane, natural gas, or natural gas-hydrogen mixtures.

[0060] In a further embodiment of the invention, it is provided that the gas flare has an ionization electrode for monitoring the flame, a solenoid valve and a burner control unit that is communicatively connected to both the ionization electrode and the solenoid valve.

[0061] In contrast to gas flares known from the prior art, the flame in the gas flare according to the invention is not controlled by temperature monitoring, but by means of the ionization electrode in conjunction with the burner control unit, which is a control unit. The burner control unit is communicatively connected to the ionization electrode and to the solenoid valve, the solenoid valve being configured to shut off, interrupt, or release the gas flow within the gas flare.

[0062] The ionization electrode acts as a flame failure device. It detects a stable flame and ensures that no gas can escape "freely," i.e., without igniting. If the ionization electrode does not detect a flame, usually after several ignition attempts, it sends a signal to the burner control unit, which in turn sends a signal to the solenoid valve, which then interrupts the gas supply.

[0063] The ionization electrode can be connected to the burner control unit as the negative terminal. The positive terminal can be the burner itself. When the burner is in operation, i.e., when it is producing a flame, the flame conducts electrical energy from the burner to the ionization electrode. In doing so, the applied alternating current is converted into direct current. In addition to its electrical conductivity, the flame also has the property of "rectifying" a previously applied alternating current. Based on the signals from the ionization electrode, the burner control unit monitors the current flow and reacts to deviations from the preset values. The gas supply is interrupted by the solenoid valve if the circuit is not closed or if alternating current is flowing.

[0064] In a further embodiment of the invention, the solenoid valve is arranged between the gas distribution element and the regulating valve and is fluidically connected to both the gas distribution element and the regulating valve.

[0065] To prevent the accumulation of condensation, particularly water droplets, on the ionization electrode, a further embodiment of the invention provides that the ionization tip axis and the longitudinal axis of the ionization electrode form an angle of 55° to 75°, preferably 60° to 70°, and particularly preferably 63° to 67°. This ensures that the flame monitoring function is not impaired.

[0066] Naturally, the ionization electrode is directed or inclined towards the area above the burner where a flame can be ignited or where a flame may be located. In particular, the ionization electrode is therefore oriented downstream in the direction of gas flow, or, viewed in the direction of the flame, towards the tip of the flame.

[0067] Due to the inclination of the ionization electrode, the rainwater can run off or drip away and does not wet the ionization electrode, especially its end facing the flame.

[0068] Preferably, the end of the ionization electrode facing the flame tapers to a point. This is particularly advantageous because it further promotes the runoff of rainwater and / or prevents water from accumulating on the point.

[0069] Preferably, the longitudinal axis of the ionization electrode is arranged parallel to the longitudinal axis of the burner.

[0070] To ensure that the optical appearance of the flame or the flame pattern is not impaired, the tip of the ionization electrode is swung out from the center of the burner, so that the tip is located in an edge area of ​​the flame.

[0071] Preferably, the tip of the ionization electrode is swivelled approximately 10° from the center of the burner. This means that, in a top view of the gas flare, the direct, shortest connecting line between the longitudinal axis of the ionization electrode and the longitudinal axis of the burner, as well as a projection of the ionization tip axis, form an angle of approximately 10°. BRIEF DESCRIPTION OF THE FIGURES

[0072] The invention will now be explained in more detail using exemplary embodiments. The drawings are exemplary and are intended to illustrate the inventive concept, but in no way to restrict or even exhaustively represent it.

[0073] This shows: Fig. 1 a schematic axonometric exploded view of a burner according to the invention; Fig. 2 a schematic axonometric view of the burner according to the invention; Fig. 3 a schematic side view of a gas distribution element of the burner according to the invention; Fig. 4 a schematic top view of the burner according to the invention; Fig. 5 a schematic sectional view of the burner according to the invention; Fig. 6 a schematic axonometric view of a gas flare according to the invention; Fig. 7 a schematic side view of an ionization electrode of the gas flare according to the invention; Fig. 8 a schematic top view of the ionization electrode. WAYS TO IMPLEMENT THE INVENTION

[0074] Fig. 1 shows a schematic axonometric exploded view of a burner 1 according to the invention for a gas flare 20 for illuminating open areas and / or for providing heat outdoors. Fig. 2Figure 1 shows the burner 1 according to the invention in a schematic axonometric view, i.e. assembled.

[0075] The burner 1 extends along a longitudinal axis 2 and comprises a burner tube 3 and a gas distribution element 5, wherein both the burner tube 3 and the gas distribution element 5 have a round cross-section in this embodiment. The burner tube 3 and the gas distribution element 5 are therefore turned parts, preferably made of brass.

[0076] In this embodiment, the burner tube 3 has four ventilation openings 4 which extend perpendicular to the longitudinal axis 2, are arranged essentially uniformly along a circumference of the burner tube 3 and are all arranged at the same height when viewed in a gas flow direction 8.

[0077] The gas distribution element 5 comprises a tubular base body 6 and is fluidically connected to the burner tube 3. In this embodiment, the gas distribution element 5 is screwed to the burner tube 3 (the corresponding threads are shown in Fig. 1 (not shown), wherein the base body 6 has a flange in a central region on which the burner tube 3 rests. The gas distribution element 5, in particular the base body 6, projects section by section into the burner tube 3. That is, the gas distribution element 5 is arranged section by section upstream of the burner tube 3 when viewed in the direction of gas flow 8.

[0078] In this embodiment, the gas distribution element 5 has four gas outlet openings 7 which extend transversely to the longitudinal axis 2, are arranged essentially uniformly along a circumference of the base body 6 and are all arranged at the same height when viewed in the direction of gas flow 8.

[0079] The gas distribution element 5 has a cover 14 arranged perpendicular to the longitudinal axis 2 at the rear end of the base body 6 as viewed in the direction of gas flow 8, i.e., downstream of the gas outlet openings 7 as viewed in the direction of gas flow 8. In this embodiment, the cover 14 projects radially beyond the base body 6 in its entirety. On the side facing the gas outlet openings 7, the cover 14 has a groove 15 by means of which rainwater can drip off the cover 14 in a controlled manner. The groove 15 is particularly important in Fig. 3 The figure shows a schematic side view of the gas distribution element 5 of the burner 1 according to the invention. The groove 15 ensures that rainwater is kept away from the gas outlet openings 7.

[0080] Furthermore, it is from Fig. 1 and 2It is evident that the burner 1 includes an air mixing element 9 for influencing the flame color and flame height. This element partially surrounds the burner tube 3 and is slidably arranged on the burner tube 3 both along the longitudinal axis 2 and along a circumferential direction 10. The air mixing element 9 makes it possible to partially cover or open the ventilation openings 4. Fig. 2 In the illustrated embodiment, the ventilation openings 4 are, for example, completely covered.

[0081] Viewed in the direction of gas flow 8 downstream of the ventilation openings 4 and the gas outlet openings 7, the burner 1 also has a gas disc 11, in this embodiment made of stainless steel, which is arranged perpendicular to the longitudinal axis 2 and comprises several bores 12. The gas disc 11 is arranged in a rear region of the burner tube 3, viewed in the direction of gas flow 8, and is fixed in the burner tube 3 by means of a clamping ring 13. A detailed embodiment of the gas disc 11 is shown in Fig. 4The figure shows a schematic top view of the burner 1 according to the invention. In this embodiment, the bores 12 arranged in an outer region of the gas disk 11 are designed as elongated bores 16, and the bores 12 arranged further inwards are designed as round bores 21. Both the elongated bores 16 and the round bores 21 are each arranged in a circular ring and each follows a mean circular ring diameter, with the circular ring with the elongated bores 16 being located further outwards in the radial direction than the circular ring with the round bores 21.

[0082] In Fig. 5Figure 1, which shows a schematic sectional view of the burner 1 according to the invention, depicts a streamline of the gas flow, which illustrates the gas flow direction 8 in detail. In an operating state, the gas can enter the gas distribution element 5, in particular the base body 6, via a gas line (not shown) which is fluidically connected on one side to a gas source (also not shown) and on the other side to the gas distribution element 5. The gas passes through the gas outlet openings 7 into the burner tube 3 and exits the burner tube 3 after passing the gas disc 11.

[0083] Out of Fig. 5 It is further evident that the longitudinal axis 2 and a longitudinal axis 17 of each gas outlet opening 7 in this embodiment enclose an angle α of 45°, which ensures that the gas passes unhindered, i.e. with as little loss as possible, from the gas distribution element 5 into the burner tube 3.

[0084] Furthermore, it is from Fig. 5 It is evident that the base body 6 of the gas distribution element 5 projects into the burner tube 3 in such a way that the gas outlet openings 7 are all located completely downstream of the ventilation openings 4 when viewed in the direction of gas flow 8. This ensures that any rainwater that may have entered the burner 1 can drain away as efficiently as possible and does not enter the gas outlet openings 7.

[0085] An embodiment of a gas flare 20 comprising the burner 1 according to the invention is shown in an axonometric view in Fig. 6 The gas flare 20 comprises, in addition to the burner 1, a regulating valve 22, a solenoid valve 24, a burner control unit (not shown), an ignition electrode 26, an ionization electrode 18, a mounting plate 27 and a gas line 23 which can be connected to a gas source (not shown).

[0086] Viewed in the direction of gas flow 8, the gas line 23 is arranged first. This is followed by the regulating valve 22 and the solenoid valve 24. Finally, the burner 1, the mounting plate 27, the ignition electrode 26 and the ionization electrode 18 follow.

[0087] The regulating valve 22 is fluidically connected to the gas line 23 and to the solenoid valve 24 and serves to adjust the gas pressure. The solenoid valve 24 is communicatively connected to the burner control unit and fluidically to the burner 1. The ignition electrode 26 and the ionization electrode 18, in particular their longitudinal axes, are arranged essentially parallel to the longitudinal axis 2 of the burner 1, and their tips are located above the gas disc 11 when viewed in the direction of gas flow 8 (or along an imaginary extension of the direction of gas flow 8).

[0088] The tip of the ignition electrode 26 is directed towards the gas disc 11 and ensures that the flame can be ignited properly.

[0089] The ionization electrode 18 serves to monitor the flame. It is in communicative contact with the burner control unit. If the ionization electrode 18 does not detect a flame, it transmits a signal to the burner control unit, which in turn sends a signal to the solenoid valve 24, which then interrupts the gas supply.

[0090] To keep the ionization electrode 18 free of rainwater, in one embodiment an ionization tip axis 19 and a longitudinal axis 28 of the ionization electrode 18 form an angle β of 65°. This is due to Fig. 7 as shown in the schematic side view of an embodiment of the ionization electrode 18 of the gas flare 20 according to the invention.

[0091] Furthermore, in Fig. 6 In the illustrated embodiment, the tip of the ionization electrode 18 is swung out from the center of the burner 1, in particular the gas disk 11. In detail, one can see in Fig. 8 , which shows a schematic top view of the ionization electrode 18, that the shortest connecting line 29 between the longitudinal axis 2 of the burner 1 and the longitudinal axis 28 of the ionization electrode 18 and a projection of the ionization tip axis 19 enclose an angle γ of approximately 10°. REFERENCE MARK LIST

[0092] 1 Burner 2 Longitudinal axis of burner 1 3 Burner tube 4 Ventilation opening 5 Gas distribution element 6 Base body of gas distribution element 5 7 Gas outlet opening 8 Gas flow direction 9 Air mixing element 10 Circumferential direction 11 Gas disc 12 Holes of gas disc 11 13 Clamping ring 14 Cover of gas distribution element 5 15 Groove 16 Slotted hole 17 Longitudinal axis of gas outlet opening 7 18 Ionization electrode 19 Ionization tip axis 20 Gas flare 21 Round hole 22 Control valve 23 Gas line 24 Solenoid valve 25- 26 Ignition electrode 27 Mounting plate 28 Longitudinal axis of ionization electrode 18 29 Connecting line between the longitudinal axis 2 of burner 1 and the longitudinal axis 28 of the ionization electrode 18 α Angle between the longitudinal axis 2 and the longitudinal axis 17 β Angle between the longitudinal axis 28 of the ionization electrode 18 and the ionization tip axis 19 γ Angle between the connecting line 29 and the projection of the ionization tip axis 19

Claims

1. A burner (1) for a gas flare (20) for illuminating open spaces, in particular terraces or beer gardens, and / or for giving out heat outdoors, which burner (1) extends along a longitudinal axis (2) and - comprises a burner pipe (3) comprising at least one ventilation opening (4), which extends transversely to the longitudinal axis (2), wherein the burner (1) - comprises a gas distribution element (5) which is fluidically connected to the burner pipe (3) and comprises a tubular base body (6), comprising at least one gas outlet opening (7), which extends transversely to the longitudinal axis (2), and the gas distribution element (5) comprises a cover (14), which - is arranged downstream of the at least one gas outlet opening (7) when viewed in the gas flow direction (8), - extends transversely to the longitudinal axis (2), characterized in that the cover (14) protrudes beyond the base body (6).

2. The burner (1) according to claim 1, characterized in that the gas distribution element (5), in particular the base body (6), projects into the burner pipe (3) in portions such that the at least one gas outlet opening (7) is arranged at least at the same level, preferably downstream, as the at least one ventilation opening (4) when viewed in the gas flow direction (8).

3. The burner (1) according to any one of claims 1 to 2, characterized in that the cover (14) comprises a groove (15) in the region protruding beyond the base body (6) on the side directed toward the upstream at least one gas outlet opening (7), in order to ensure that rainwater drains away in a defined manner.

4. The burner (1) according to any one of claims 1 to 3, characterized in that the gas distribution element (5) and the burner pipe (3) are each rotatable parts made of brass.

5. The burner (1) according to any one of claims 1 to 4, characterized in that the burner (1) comprises an air-admixing element (9) surrounding the burner pipe (3) at least in portions, which air-admixing element (9) is arranged on the burner pipe (3) so as to be movable along the longitudinal axis (2) and / or in a circumferential direction (10), in order to make it possible to cover or open the at least one ventilation opening (4) at least in portions.

6. The burner (1) according to any one of claims 1 to 5, characterized in that the burner (1) comprises a gas disk (11) which is arranged in the burner pipe (3) transversely, preferably at right angles, to the longitudinal axis (2) when viewed in the gas flow direction (8) downstream of the at least one gas outlet opening (7) and of the at least one ventilation opening (4) and comprises a plurality of holes (12) arranged in parallel with the longitudinal axis (2) at least in portions to distribute the air-gas mixture.

7. The burner (1) according to claim 6, characterized in that the holes (12) are designed as slotted holes (16) at least in part.

8. The burner (1) according to any one of claims 1 to 7, characterized in that the longitudinal axis (2) and a longitudinal axis (17) of the at least one gas outlet opening (7) enclose an angle (α) of 35° to 55°, preferably of 40° to 50°, particularly preferably of 43° to 47°.

9. The burner (1) according to any one of claims 1 to 8, characterized in that the gas distribution element (5) comprises four gas outlet openings (7) evenly distributed over the circumference of the base body (6) and the burner pipe (3) comprises four ventilation openings (4) evenly distributed over the circumference of the burner pipe (3), the four gas outlet openings (7) being arranged at the same level when viewed in the gas flow direction (8) and the four ventilation openings being arranged at the same level when viewed in the gas flow direction (8).

10. A gas flare (20) for illuminating open spaces, in particular terraces or beer gardens, and / or for giving out heat outdoors, characterized in that the gas flare (20) comprises a burner (1) according to any one of claims 1 to 9, the burner (1) being able to be connected to a gas source, it being possible to generate a flame by combusting a gaseous fuel from the gas source.

11. The gas flare (20) according to claim 10, characterized in that the gas flare (20) comprises a regulating valve (22) fluidically connected to the gas distribution element (5).

12. The gas flare (20) according to any one of claims 10 to 11, characterized in that the gas flare (20) comprises an ionization electrode (18) for monitoring the flame, a solenoid valve (24), and a burner relay communicatively connected both to the ionization electrode (18) and to the solenoid valve (24).

13. The gas flare (20) according to claim 11 and 12, characterized in that the solenoid valve (24) is arranged between the gas distribution element (5) and the regulating valve (22) and is fluidically connected both to the gas distribution element (5) and to the regulating valve (22).

14. The gas flare (20) according to any one of claims 12 to 13, characterized in that an ionizing pin axis (19) of the ionization electrode (18) and a longitudinal axis (28) of the ionization electrode (18) enclose an angle (ß) of 55° to 75°, preferably of 60° to 70°, particularly preferably of 63° to 67°.

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