Burners

Abstract

Burner (1) for a gas flare (20) for illuminating open spaces, in particular terraces or beer gardens, and / or for providing heat outdoors, which burner (1) extends along a longitudinal axis (2) and - comprises a burner tube (3) with at least one ventilation opening (4) extending transversely to the longitudinal axis (2). In order to ensure smooth operation despite precipitation, the invention provides that the burner (1) - comprises a gas distribution element (5) fluidly connected to the burner tube (3) and having a tubular base body (6) comprising at least one gas outlet opening (7) extending transversely to the longitudinal axis (2).

Description

FIELD OF THE INVENTION

[0001] The invention relates to a burner for a gas flare for illuminating open spaces, in particular terraces or 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] In addition to their use in industry for flaring flammable gases that are not used for energy or material purposes, gas flares or gas burners are used in tourism, particularly in the hotel industry, as elegant lighting elements for outdoor areas such as terraces and gardens, and as heat sources.

[0003] The operation of gas flares in tourism is typically occasional and therefore time-limited. In particular, gas flares are used for lighting in the evenings and / or for heating during the cold season. Relatively short periods of operation are therefore generally interrupted by longer downtimes.

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

[0005] A disadvantage of state-of-the-art gas flares is that the ingress of rainwater into the burner, particularly the gas nozzle, leads to corrosion and malfunctions. For this reason, conventional gas flares must be covered, i.e., a hood or roof must be installed above the flame, and must be regularly maintained by specially trained personnel. This significantly limits design options and, on the other hand, generates additional ongoing costs.

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

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

[0008] It is therefore the object of the present invention to provide a burner for a gas flare that overcomes the disadvantages of the prior art. In particular, the burner should ensure continuous and smooth operation of the gas flare despite precipitation. PRESENTATION OF THE INVENTION

[0009] This task is carried out in a burner for a gas flare for illuminating open spaces, in particular terraces or gardens, and / or for providing heat outdoors, which burner extends along a longitudinal axis and a burner tube with at least one ventilation opening which extends transversely to the longitudinal axis, according to the invention in that the burner comprises a gas distribution element which is fluidically connected to the burner tube and has a tubular base body comprising at least one gas outlet opening which extends transversely to the longitudinal axis, includes.

[0010] 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.

[0011] In the context of the present invention, an operating state is understood to mean any state of the gas flare, in particular of the burner, in which the gas flare, in particular the burner, is arranged outdoors, regardless of whether gas flows through the burner or not - i.e. regardless of whether a flame is generated or not.

[0012] Both the burner tube and the gas distribution element are elongated hollow bodies.

[0013] Viewed in a gas flow direction, 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 within the burner tube.

[0014] It is conceivable that the burner tube and the gas distribution element can be screwed together. For this purpose, the burner tube can have an internal thread and the gas distribution element a corresponding external thread.

[0015] The burner tube and the gas distribution element are fluidically connected to each other, i.e. it is ensured that gas can flow or pass from the gas distribution element into the burner tube.

[0016] 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 quadrangular 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 have a round cross-sectional shape at least in sections; particularly preferably, the burner tube and / or the gas distribution element have a round cross-sectional shape.

[0017] Due to the orientation of at least one gas outlet opening transverse to the longitudinal axis, it is ensured that rainwater can essentially not enter the gas distribution element, thus significantly reducing malfunctions and corrosion within the gas distribution element compared to the prior art. This means that in gas flares comprising a burner according to the invention, which are arranged outdoors and have no roof, smooth operation is ensured despite rainwater. This eliminates the need for regular maintenance, and the gas flare can be operated much more economically and reliably.

[0018] The at least one gas outlet opening preferably has a cross-section which is substantially constant along a longitudinal extent of the gas outlet opening.

[0019] To ensure the drainage of rainwater during operation, one embodiment of the invention provides that the gas distribution element, in particular the base body, extends into the burner tube in sections such that the at least one gas outlet opening is arranged at at least the same height, preferably downstream, as the at least one ventilation opening, as seen in the gas flow direction. Thus, rainwater that has penetrated the burner tube can escape or drain away harmlessly through the at least one ventilation opening.

[0020] This means that, even during heavy rainfall, there is essentially no accumulation of rainwater inside the burner pipe.

[0021] The at least one gas outlet opening is arranged at least at the same height as the at least one ventilation opening, as viewed in the gas flow direction. Specifically, this means that the gas distribution element, in particular the base body, extends partially into the burner tube such that a first plane, which is arranged perpendicular to the longitudinal axis and in which a first point of the at least one gas outlet opening is arranged, as viewed in the gas flow direction, lies at least at the same height, preferably downstream, as a second plane, which is arranged perpendicular to the longitudinal axis and in which a first point of the at least one ventilation opening is arranged, as viewed in the gas flow direction.

[0022] If the at least one gas outlet opening and the at least one ventilation opening are arranged at the same height as seen in the gas flow direction and the at least one gas outlet opening and the at least one ventilation opening are arranged at least partially one behind the other as seen 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 partially as seen in this direction.

[0023] If the at least one gas outlet opening and the at least one ventilation opening are not arranged at least partially one behind the other in the direction perpendicular to the longitudinal axis, then there is no overlap of these at least two openings in this direction, although the at least one gas outlet opening and the at least one ventilation opening are arranged at the same height as seen in the gas flow direction.

[0024] To best keep precipitation water away from the at least one gas outlet opening, the at least one gas outlet opening is preferably arranged at least partially downstream of the at least one ventilation opening, as viewed in the gas flow direction. Particularly preferably, the at least one gas outlet opening is arranged completely downstream of the at least one ventilation opening, as viewed in the gas flow direction.

[0025] 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.

[0026] In order to keep precipitation water, in particular falling precipitation water, essentially completely away from the at least one gas outlet opening, a further embodiment of the invention provides that the gas distribution element has a cover which seen in the gas flow direction is arranged downstream of the at least one gas outlet opening, extends transversely to the longitudinal axis and projects beyond the base body.

[0027] Preferably, the cover is arranged at a rear end of the gas distribution element as seen in the gas flow direction.

[0028] The cover can extend beyond the base body completely or in sections. Preferably, the cover is arranged so as to extend beyond the base body at least behind the at least one gas outlet opening, viewed along the longitudinal axis (in the gas flow direction), thereby preventing precipitation water from penetrating the at least one gas outlet opening.

[0029] The cover preferably extends in a normal plane arranged at right angles to the longitudinal axis. This means that the cover can be designed as a flat disc that is essentially horizontal in the operating state. This is particularly advantageous because the flat disc atomizes the precipitation water, ensuring that the gas can flow essentially unhindered in the burner tube despite the presence of precipitation water, since the precipitation water does not flow in a stream or torrent, but rather in a dust-like or droplet-like manner. This means that an essentially unhindered gas flow is possible despite precipitation or precipitation water.

[0030] To be able to control the drainage of rainwater, a further embodiment of the invention provides that the cover, on the side facing the at least one upstream gas outlet opening, has a groove in the area projecting beyond the base body to ensure defined dripping of rainwater. This means that the area of ​​the cover projecting beyond the base body has the groove on its underside. The groove can be milled into the cover and, in the case of a cover that projects completely beyond the base body, is preferably circular.

[0031] The groove acts as a drip edge or water nose to ensure that precipitation water that penetrates into the burner from above during operation drips off in a targeted manner and does not penetrate into at least one gas outlet opening and subsequently into the gas distribution element.

[0032] 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.

[0033] In addition to its good processability, brass is extremely resistant to corrosion, which makes it an excellent material for outdoor use while also being easy to machine and shape.

[0034] In order to be able to adjust the flame colour and / or the flame height, which can vary depending on the type of gas used, a further

[0035] In a variant of the invention, the burner comprises an air admixture element which surrounds the burner tube at least in sections, which air admixture element is arranged on the burner tube so as to be displaceable along the longitudinal axis and / or along a circumferential direction in order to be able to cover or uncover the at least one ventilation opening at least in sections.

[0036] Depending on the position of the air addition 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.

[0037] If, for example, at least one ventilation opening is completely opened using the air saturation element, the burner generates a maximum flame. This means that the flame, particularly its height and color, can be regulated or adjusted using the air saturation element.

[0038] The more of the at least one vent is covered (depending on the gas type), the bluer the flame appears. If the at least one vent is essentially completely covered, a yellow-orange flame may develop.

[0039] In a further embodiment of the invention, it is provided that the burner comprises a gas disc arranged in the burner tube transversely, preferably at right angles, to the longitudinal axis downstream of the at least one gas outlet opening and of the at least one ventilation opening in the gas flow direction, with a plurality of bores arranged at least partially parallel to the longitudinal axis for distributing the air-gas mixture.

[0040] If the holes are arranged regularly, the gas disc can therefore serve to ensure a particularly uniform distribution of the air-gas mixture.

[0041] The flame shape can be influenced by means of the gas disc, especially by means of the holes.

[0042] The gas disc is preferably made of stainless steel, which not only allows it to withstand high temperatures but also prevents it from being susceptible to corrosion.

[0043] In a further embodiment, the bores are at least partially designed as elongated holes. The elongated holes are preferably arranged in a circular ring and follow a mean circular ring diameter.

[0044] Surprisingly, the elongated holes ensure that the gas disc does not become clogged due to rainwater. With small-diameter holes, it can happen that rainwater, especially rainwater droplets, cannot pass through the holes due to high surface tension, preventing the burner from igniting because no gas can flow through the gas disc. Due to the correspondingly larger surface area or volume of the elongated holes, the rainwater runs or trickles through the elongated holes without causing any blockages.

[0045] In addition to the elongated holes, the gas disc can of course also have additional holes, especially round holes, which may have a smaller surface area or volume than the elongated holes. Even if other holes are present, the elongated holes ensure that the burner can be ignited despite rainwater.

[0046] The elongated holes can be arranged in a circle within the circular ring. The long sides of the elongated holes can be essentially parallel to each other. The long sides can be straight or curved.

[0047] If the gas disc is round, the outer diameter of the circular ring preferably coincides with the diameter of the gas disc. This means that the circular ring is then located in an outer region of the gas disc.

[0048] 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.

[0049] To ensure unhindered gas discharge 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 of 40° to 50°, particularly preferably of 43° to 47°. The at least one gas outlet opening arranged in this angle (range) ensures that there is no turbulence in the gas and that the gas can pass evenly, in particular essentially laminarly, from the gas distributor into the burner tube.

[0050] In order to achieve an optimal flame by means of the burner according to the invention, a further embodiment provides that the gas distribution element has four gas outlet openings evenly distributed over the circumference of the base body and the burner tube has four ventilation openings evenly distributed over the circumference of the burner tube, wherein the four gas outlet openings are arranged at the same height as seen in the gas flow direction and the four ventilation openings are arranged at the same height as seen in the gas flow direction.

[0051] 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.

[0052] In addition, the presence of four ventilation openings evenly arranged around the circumference of the burner tube ensures that rainwater can be optimally drained from the burner.

[0053] In particular, it is possible for the inner diameter of the base body of the gas distribution element to correspond to the sum of the diameters of the four gas outlet openings. This means that the cross-section of the inner base body (= total cross-section minus wall cross-section) is essentially the same size as the sum of the four cross-sections of the gas outlet openings. Thus, there is no cross-sectional constriction of the inner base body relative to the four gas outlet openings.

[0054] Preferably, all gas outlet openings have a cross-sectional area that is substantially constant over the longitudinal extent of the gas outlet openings.

[0055] According to the above, a gas flare is further provided according to the invention for illuminating open spaces, in particular terraces or gardens, and / or for providing heat outdoors, wherein the gas flare comprises a burner according to the invention, the burner being connectable to a gas source, wherein a flame can be generated by burning a gaseous fuel from the gas source.

[0056] A further disadvantage of the 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 for a desired flame height is present. Therefore, a further embodiment of the invention provides for the gas flare to include a regulating valve fluidly connected to the gas distribution element.

[0057] The gas pressure can be adjusted using the regulating valve. This allows the gas flare according to the invention to be operated with all types of flammable gases, such as propane, butane, natural gas, or natural gas-hydrogen mixtures.

[0058] 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 communicatively connected to both the ionization electrode and the solenoid valve.

[0059] In contrast to prior art gas flares, the flame in the gas flare according to the invention is not controlled by temperature monitoring, but rather 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 the solenoid valve, with the solenoid valve configured to shut off, interrupt, or release the gas flow within the gas flare.

[0060] The ionization electrode is an ignition safety device. It detects a stable flame and ensures that no gas can escape "freely," i.e., without igniting. If the ionization electrode detects no flame, usually after several ignition attempts, it transmits a signal to the burner control unit, which then sends a signal to the solenoid valve, which then shuts off the gas supply.

[0061] 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., it generates a flame, the flame conducts electrical energy from the burner to the ionization electrode. 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. The burner control unit monitors the current flow based on the signals from the ionization electrode and reacts to deviations from the preset setpoints. For example, the gas supply is interrupted via the solenoid valve if the circuit is not closed or alternating current is flowing.

[0062] 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.

[0063] To prevent precipitation, especially water droplets, from accumulating on the ionization electrode, a further embodiment of the invention provides that an ionization tip axis of the ionization electrode and a longitudinal axis of the ionization electrode form an angle of 55° to 75°, preferably 60° to 70°, particularly preferably 63° to 67°. This ensures that the flame monitoring function is not impaired.

[0064] Naturally, the ionization electrode is directed or inclined toward the area above the burner where a flame is ignitable or where a flame may be present. In particular, the ionization electrode is oriented downstream in the gas flow direction or, as seen in the flame direction, toward a flame tip.

[0065] Due to the inclination of the ionization electrode, the precipitation water can run off or drip off and does not wet the ionization electrode, especially its end facing the flame.

[0066] Preferably, the end of the ionization electrode facing the flame is tapered. This is particularly advantageous as it further promotes precipitation runoff and prevents water from accumulating on the tip.

[0067] Preferably, the longitudinal axis of the ionization electrode is arranged parallel to the longitudinal axis of the burner.

[0068] In order to avoid impairing the visual appearance of the flame or the flame pattern, the tip of the ionization electrode is pivoted away from the center of the burner so that the tip is positioned at the edge of the flame.

[0069] Preferably, the tip of the ionization electrode is pivoted approximately 10° from the center of the burner. This means that, in a plan view of the gas torch, 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, enclose an angle of approximately 10°. SHORT DESCRIPTION OF THE CHARACTERS

[0070] 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 restrict it or represent it exhaustively.

[0071] It shows: Fig. 1 is a schematic axonometric exploded view of a burner according to the invention; Fig. 2 is a schematic axonometric view of the burner according to the invention; Fig. 3 is a schematic side view of a gas distribution element of the burner according to the invention; Fig. 4 is a schematic plan view of the burner according to the invention; Fig. 5 is a schematic sectional view of the burner according to the invention; Fig. 6 is a schematic axonometric view of a gas flare according to the invention; Fig. 7 is a schematic side view of an ionization electrode of the gas flare according to the invention; Fig. 8 is a schematic plan view of the ionization electrode. WAYS OF IMPLEMENTING THE INVENTION

[0072] Fig. 1 shows a schematic axonometric exploded view of a burner 1 according to the invention for a gas flare 20 for illuminating open spaces and / or for providing heat outdoors. Fig. 2represents the burner 1 according to the invention in a schematic axonometric view, ie assembled.

[0073] The burner 1 extends along a longitudinal axis 2 and comprises a burner tube 3 and a gas distribution element 5. In this exemplary embodiment, both the burner tube 3 and the gas distribution element 5 have a round cross-section. The burner tube 3 and the gas distribution element 5 are thus turned parts, preferably made of brass.

[0074] In this exemplary embodiment, the burner tube 3 has four ventilation openings 4 which extend perpendicular to the longitudinal axis 2, are arranged substantially uniformly along a circumference of the burner tube 3 and are all arranged at the same height as seen in a gas flow direction 8.

[0075] 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 sits. The gas distribution element 5, in particular the base body 6, protrudes in sections into the burner tube 3. This means that the gas distribution element 5 is arranged in sections in front of the burner tube 3, as seen in the gas flow direction 8.

[0076] In this exemplary embodiment, the gas distribution element 5 has four gas outlet openings 7 which extend transversely to the longitudinal axis 2, are arranged substantially uniformly along a circumference of the base body 6 and are all arranged at the same height as seen in the gas flow direction 8.

[0077] The gas distribution element 5 has, at the rear end of the base body 6 as seen in the gas flow direction 8, i.e., downstream of the gas outlet openings 7 as seen in the gas flow direction 8, a cover 14 arranged perpendicular to the longitudinal axis 2, which in this embodiment projects radially beyond the base body 6. On the side directed towards 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 defined manner. The groove 15 is particularly Fig. 3 visible, which represents a schematic side view of the gas distribution element 5 of the burner 1 according to the invention. The groove 15 ensures that precipitation water is kept away from the gas outlet openings 7.

[0078] Furthermore, Fig. 1 and 2It can be seen that the burner 1 comprises an air admixture element 9 for influencing the flame color and flame height, which surrounds the burner tube 3 in sections and is arranged on the burner tube 3 so as to be displaceable both along the longitudinal axis 2 and along a circumferential direction 10. By means of the air admixture element 9, it is possible to cover or uncover the ventilation openings 4 at least in sections. Fig. 2 In the embodiment shown, for example, the ventilation openings 4 are completely covered.

[0079] Viewed in the gas flow direction 8 downstream of the ventilation openings 4 and the gas outlet openings 7, the burner 1 also has a gas disc 11, made of stainless steel in this embodiment, which is arranged perpendicular to the longitudinal axis 2 and comprises a plurality of bores 12. The gas disc 11 is arranged in a rear region of the burner tube 3, viewed in the gas flow direction 8, and is fixed in the burner tube 3 by means of a clamping ring 13. In detail, an embodiment of the gas disc 11 is shown in Fig. 4, which shows a schematic plan view of the burner 1 according to the invention. In this exemplary embodiment, the bores 12 arranged in an outer region of the gas disk 11 are designed as elongated holes 16, and the bores 12 arranged further inward are designed as round bores 21. Both the elongated holes 16 and the round bores 21 are each arranged in a circular ring and each follow a mean circular ring diameter, wherein the circular ring with the elongated holes 16 is located further outward in the radial direction than the circular ring with the round bores 21.

[0080] In Fig. 5, which shows a schematic sectional view of the burner 1 according to the invention, a streamline of the gas flow is shown, showing 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 the one hand to a gas source (also not shown) and on the other hand to the gas distribution element 5. The gas enters the burner tube 3 through the gas outlet openings 7 and exits the burner tube 3 after passing the gas disk 11.

[0081] 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 form an angle α of 45°, which ensures that the gas passes unhindered, ie with as little loss as possible, from the gas distribution element 5 into the burner tube 3.

[0082] In addition, Fig. 5 It can be seen that the base body 6 of the gas distribution element 5 protrudes into the burner tube 3 in such a way that the gas outlet openings 7 are all arranged completely downstream of the ventilation openings 4, as seen in the gas flow direction 8. This ensures that any precipitation water that has penetrated into the burner 1 can drain off as best as possible and does not penetrate into the gas outlet openings 7.

[0083] An embodiment of a gas flare 20 comprising the burner 1 according to the invention is shown in an axonometric view in Fig. 6 In addition to the burner 1, the gas flare 20 comprises 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 that can be connected to a gas source (not shown).

[0084] Viewed in the gas flow direction 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.

[0085] 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 connected 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 arranged above the gas disc 11, as seen in the gas flow direction 8 (or along an imaginary extension of the gas flow direction 8).

[0086] The tip of the ignition electrode 26 is directed towards the gas disc 11 and ensures that the flame can be properly ignited.

[0087] The ionization electrode 18 monitors the flame. It communicates with the burner control unit. If the ionization electrode 18 detects no flame, it transmits a signal to the burner control unit, which then sends a signal to the solenoid valve 24, which then interrupts the gas supply.

[0088] In order to keep the ionization electrode 18 free of precipitation water, an ionization tip axis 19 of the ionization electrode 18 and a longitudinal axis 28 of the ionization electrode 18 enclose an angle β of 65° in one embodiment. This is Fig. 7 which shows a schematic side view of an embodiment of the ionization electrode 18 of the gas flare 20 according to the invention.

[0089] Furthermore, in Fig. 6 In the illustrated embodiment, a tip of the ionization electrode 18 is pivoted out from a center of the burner 1, in particular the gas disk 11. In detail, one can see in Fig. 8 , which represents a schematic plan 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°. LIST OF REFERENCE SYMBOLS

[0090] 1Burner 2Longitudinal axis of the burner 1 3Burner tube 4Ventilation opening 5Gas distribution element 6Base body of the gas distribution element 5 7Gas outlet opening 8Gas flow direction 9Air admixture element 10Circumferential direction 11Gas disc 12Bores of the gas disc 11 13Clamping ring 14Cover of the gas distribution element 5 15Groove 16Elongated hole 17Longitudinal axis of the gas outlet opening 7 18Ionization electrode 19Ionization tip axis 20Gas torch 21Round hole 22Regulating valve 23Gas line 24Solenoid valve 25- 26Ignition electrode 27Mounting plate 28Longitudinal axis of the ionization electrode 18 29Connecting line between the longitudinal axis 2 of the burner 1 and the longitudinal axis 28 of the Ionization electrode 18 αAngle between the longitudinal axis 2 and the longitudinal axis 17 βAngle between the longitudinal axis 28 of the ionization electrode 18 and the ionization tip axis 19 γAngle between the connecting line 29 and the projection of the ionization peak axis 19

Claims

1. Burner (1) for a gas flare (20) for illuminating open spaces, in particular terraces or gardens, and / or for providing heat outdoors, which burner (1) extends along a longitudinal axis (2) and - comprises a burner tube (3) with at least one ventilation opening (4) extending transversely to the longitudinal axis (2), characterized in that the burner (1) - comprises a gas distribution element (5) fluidically connected to the burner tube (3) with a tubular base body (6) comprising at least one gas outlet opening (7) which extends transversely to the longitudinal axis (2).

2. Burner (1) according to claim 1, characterized in that the gas distribution element (5), in particular the base body (6), projects into the burner tube (3) in sections such that the at least one gas outlet opening (7) is arranged at least at the same height, preferably downstream, as the at least one ventilation opening (4), as seen in the gas flow direction (8).

3. Burner (1) according to one of claims 1 to 2, characterized in that the gas distribution element (5) has a cover (14) which - as seen in the gas flow direction (8) is arranged downstream of the at least one gas outlet opening (7), - extends transversely to the longitudinal axis (2) and - projects beyond the base body (6).

4. Burner (1) according to claim 3, characterized in that the cover (14) has a groove (15) on the side facing the at least one upstream gas outlet opening (7) in the area projecting beyond the base body (6) in order to ensure defined dripping of precipitation water.

5. Burner (1) according to one of claims 1 to 4, characterized in that the gas distribution element (5) and the burner tube (3) are each turned parts made of brass.

6. Burner (1) according to one of claims 1 to 5, characterized in thatthe burner (1) comprises an air admixture element (9) which surrounds the burner tube (3) at least in sections, which air admixture element (9) is arranged on the burner tube (3) so as to be displaceable along the longitudinal axis (2) and / or along a circumferential direction (10) in order to be able to cover or uncover the at least one ventilation opening (4) at least in sections.

7. Burner (1) according to one of claims 1 to 6, characterized in that the burner (1) comprises a gas disc (11) arranged in the burner tube (3) transversely, preferably at right angles, to the longitudinal axis (2) downstream of the at least one gas outlet opening (7) and of the at least one ventilation opening (4) in the gas flow direction (8), with a plurality of bores (12) arranged at least in sections parallel to the longitudinal axis (2) for distributing the air-gas mixture.

8. Burner (1) according to claim 7, characterized in that the bores (12) are at least partially designed as elongated holes (16).

9. Burner (1) according to one of claims 1 to 8, 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°.

10. Burner (1) according to one of claims 1 to 9, characterized in that the gas distribution element (5) has four gas outlet openings (7) distributed evenly over the circumference of the base body (6) and the burner tube (3) has four ventilation openings (4) distributed evenly over the circumference of the burner tube (3), wherein the four gas outlet openings (7) are arranged at the same height as seen in the gas flow direction (8) and the four ventilation openings are arranged at the same height as seen in the gas flow direction (8).

11. Gas flare (20) for illuminating open spaces, in particular terraces or gardens, and / or for providing heat outdoors characterized in thatthe gas flare (20) comprises a burner (1) according to one of claims 1 to 10, wherein the burner (1) is connectable to a gas source, wherein a flame can be generated by burning a gaseous fuel from the gas source.

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

13. Gas flare (20) according to one of claims 11 to 12, characterized in that the gas flare (20) has an ionization electrode (18) for monitoring the flame, a solenoid valve (24) and a burner control unit communicatively connected to both the ionization electrode (18) and the solenoid valve (24).

14. Gas flare (20) according to claim 12 and 13, characterized in thatthe solenoid valve (24) is arranged between the gas distribution element (5) and the regulating valve (22) and is fluidly connected to both the gas distribution element (5) and the regulating valve (22).

15. Gas flare (20) according to one of claims 13 to 14, characterized in that an ionization tip axis (19) of the ionization electrode (18) and a longitudinal axis (28) of the ionization electrode (18) enclose an angle (β) of 55° to 75°, preferably of 60° to 70°, particularly preferably of 63° to 67°.

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