EP1128128B1 - Radiant burner with wind protection device - Google Patents

Abstract

The burner has a casing (1) that is open on one side and contains a preferably plate-formed burner element (2) with a number of combustion channels and a funnel-shaped reflector casing (5) closed at the open casing side. The casing forms a fuel-air mixture from a fuel supply (3). A wind protection device (7) of rigid, heatproof material is arranged at the open casing side and has a number of openings. The wind protection device extends from the reflector casing in all three axis of the casing.

Description

The invention relates to a radiant burner, in particular for gaseous Fuel, with a housing open on one side for the preparation of a supplied via a device for supplying fuel and air Fuel-air mixture, arranged in the housing, numerous Burning channels having, in particular plate-shaped Burner element and a subsequent to the open side of the housing Reflector housing and one on the housing in the region of its open Housing side arranged windbreaker.

Such radiant burners are known from the prior art. For example DE-PS 15 51 770 discloses an elongate radiating element for the surface combustion of a gas-air mixture with a Housing, to which a in the longitudinal direction extending Gemischzuführrohr is connected, in which a Gemischverteileinrichtung arranged is and has a focal opening. The firing opening is of lesser Width as the housing and in relation to their width very long educated. In the housing protrudes before the middle end of the mixture supply pipe. The Gemischverteileinrichtung is provided as with passage openings Perforated plate formed, one from the outlet of the mixture supply pipe arched opposite to the mixture flow direction out Section, to which a rectilinear, the mixture supply pipe adjacent section of the burner opening overlapping section connects. In this radiating element, the horizontal section of the Guide plate, which is provided with holes, the gas-air mixture after let down to an opening. The opening is with a grid arrangement covered, which is formed by two or more networks, which networks preferably has a mesh width of about 0.4 mm.

Furthermore, from CH-PS 359 861 a generic radiant burner known in which a combustible gas-air mixture in or at a Burner end plate while heating the plate to allow a Heat radiation is burned from the plate. In this radiant burner is provided that of the organs, over which the radiant burner communicating with the outside air, at least two such are formed so that they open in the same direction, so that outside on the radiant burner wind pressure fluctuations in the same effect in each of these organs. For example, one is funnel-shaped widening housing part in the region of its opening covered by a wire mesh, by the one hand, the radiation almost unhindered can pass through, on the other hand so disturbed by flowing air mixed with turbulence and interspersed with vortices that a large Part of the flow energy is consumed on the wire mesh and under no circumstances direct jet of air can impinge on the burner end plate. One of At the bottom of the radiation burner oppressive gust of wind can therefore at best a relatively slow pressure change on both the front and the back also on the back of the Brennerabschlußplatte cause, wherein can not give pressure differences. Here it is with this device but required that in addition to the wire mesh on the open side of the housing another organ is provided for the same purpose, namely the Compensation of wind pressure fluctuations is used.

Another radiant burner is known from DE 30 12 588 C2. at This generic radiant burner are wind protection devices both in the terminal area of the serving for supplying fuel and air Device, as well as on the radiation side of the burner plate intended. The windshield on the radiation side has initially Exhaust baffles on which the two opposite Long sides of a housing surrounded by release of exhaust ducts. About bent sheet metal parts are the Abgasleitbleche with the after Burner plate to horizontal edges of the funnel-like housing part airtight connected. The exhaust baffles extend upwards to the top the longitudinal edges of the housing side wall opposite the open housing side. For the windbreak is also on the radiation side the burner plate arranged a completely covering this windscreen. The windscreen is advantageously made of expanded metal. At a distance from the burner plate and the windscreen is in the funnel-like Housing part a held on the edge heat-resistant glass ceramic plate arranged. This glass ceramic plate prevents any wind influence from the bottom in the direction of the burner plate. On the edge the outlet end of the funnel-like housing part is finally still a attached further windscreen, which largely prevents itself wind turbulence in the of the funnel-like housing part by wind, the glass ceramic plate and the windscreen included Make room. In this device, it is necessary that the of the Burner plate emitted heat radiation as a windbreaker heated glass ceramic plate heats up, making an unsatisfactory Efficiency of the radiant burner is achieved. Another radiant burner is known from US 3 847 536 A known.

Starting is of the features mentioned above and the prior art described the invention, the object of further developing a generic radiant burner such that the radiant burner despite effective wind protection device has an efficiency which is substantially in the range of the efficiency of such radiant burner is no wind protection devices.

The solution to this problem is achieved by the features of claim 1.

In a radiant burner according to the invention is therefore intended that to the reflector housing a physically trained to that effect Windbreak adjoins that the windbreaker outgoing from the housing part in the direction of all three body axes of the housing extends, wherein the windbreaker from the outside areas of the housing part extends. This Winschutzvorrichtung exists from a rigid and in particular heat-resistant material, for example Metal and has a variety of openings through which Wind and air currents in the direction of the burner plate influenced in such a way be that a very irregular or extinguishing combustion is excluded. It should be noted that, for example Gas infrared radiators used outdoors, e.g. for grandstand heating, but also in rooms with different admission by Air flow as a result of machinery, fans in the storeroom or itself opening gates, with a very low speed of the Jet area exiting fuel-air mixture work to smaller at specific load due to combustion on the surface of the ceramic or in the channels high surface temperatures and thus high Achieving radiation performance. Therefore, such radiant burners basically for wind attacks or noticeable air currents near the Combustion zone sensitive. An application of such radiant burners without wind protection device in the outdoor area is therefore uncertain. When inventive Radiant burner is but by the invention Design ensures that air flows through the windshield only with compatible flow velocity in the range of Can reach burner plate, so that these wind currents not to a irregular burning or extinguishing the flame being able to lead.

According to a further feature of the invention it is provided that the wind protection device from extension elements of the particular funnel-shaped trained housing part consists, at least in some areas have a plurality of openings and / or recesses. The extension elements form a kind of extension jacket of the particular funnel-shaped housing part, wherein the extension elements through the openings and / or recesses a change in this area on the radiant burner incident wind currents cause such that in the openings and / or recesses Wind currents are broken and / or deflected to the energy of the To reduce wind currents on the one hand and / or on the other hand in one Distract direction that is harmless to the combustion process.

It is further contemplated that the windbreaker at its preferably parallel to the open side of the housing aligned portion a cover comprising a plurality of openings and / or recesses having. This embodiment has the advantage that also in the direction of the Opening the reflector housing impinging air currents in voranstehnd described manner be reduced or deflected, so that this housing part is totally protected against a wind attack.

The extension elements and / or the cover are preferably plate-shaped. Linked to this is a relatively simple and thus cost-effective production of such extension elements, the formed according to the size of the housing of the radiant burner, i.e. tailored and then assembled to windbreak device can be so that the windbreaker as a whole forms a physically trained element which on the housing the radiation burner in the course of its manufacture or as a retrofit element can be attached. In particular, these have fast releasable Fasteners proved to be advantageous. For example, the windbreaker bolted to the housing of the radiant burner or riveted. Of course, there is also the possibility that Windscreen to weld to the housing of the radiant burner, especially in the course of the new production of such radiant burners may be advantageous for cost reasons.

The extension elements in the region of longitudinal edges of the particular funnel-shaped housing part are formed in cross-section V-shaped, for example, the shape of the reflector housing in the area continue the windbreaker before the extension elements converge in the region of the longitudinal edges and by means of Cover are connected together. Overall, the windbreaker therefore have different shapes in cross section. As advantageous have cross-sectional shapes of the windbreaker a trapezoid or a truncated diamond.

A simple manufacture of the windshield is given by that the extension elements and / or the cover of perforated plate consist. The perforated plate can be made of expanded metal. Preferably the perforated plate has holes of rectangular, in particular square Design on. The holes can also circular arc section-shaped Limitations, in particular circular, oval or elliptical design exhibit. As a perforated plate with particular suitability has such Perforated sheet exposed, which has an opening area of 70% of the total area , wherein the web thickness is approximately 1.5 mm. Here can be provided that, depending on the application, the opening area and / or the Web thickness in the area of the windscreen device, i. for example in Range of extension elements and / or cover vary. It Also, certain area of the windscreen can by at the Windbreaker attachable cover sheets are covered to certain air currents in the burner plate of the radiant burner to prevent.

Alternatively to a plate-shaped cover at the lower opening of Windscreen device may also be provided such a cover, which is formed in cross-section V-shaped. Such a cover has with regard to the air currents in the area of the wind protection devices Advantages.

To create a sufficiently stable windbreaker, which too can be used with larger radiant burners and at the same time from relatively thin material can be produced, it is provided that the windbreaker in longitudinal and / or transverse subdivision elements having. In addition, these subdivision elements can in an advantageous embodiment with corresponding openings and / or recesses also the air flow in the windscreen device influence in a desired manner.

According to a further feature of the invention it is provided that the subdivision elements at least in some areas a plurality of openings and / or recesses.

It is further provided that the openings and / or recesses at their the housing facing edges have lamellar covers. These lamellar covers are also used to influence the Air flow and the cover of possible contact surfaces for dust and other soiling in the area of the webs between the openings and / or recesses. Such contamination can in the here in question radiant burners by the heat occurring burn and possibly cause unpleasant odors. The Laminate covers are considered at an angle to the respective ones Extension member formed plate sections formed. For example Such extension elements can be made thereby be that corresponding plate portions of the extension element be expressed.

It is provided according to a further feature of the invention that the plate sections are formed in cross-section V-shaped, wherein the free ends the plate sections substantially parallel to the respective extension elements are arranged running.

An alternative embodiment of the radiation burner according to the invention provides that the windbreaker, starting from a longitudinal edge the housing part is formed substantially L-shaped and consequently has two legs, of which the free leg at least partially is aligned with the radiator opening. This embodiment has, for example Proven in such radiant burners, where a prevailing Wind direction is given, leaving only a portion of the radiant burner must be protected against wind. It exists but also the possibility of two parallel longitudinal edges of the housing part in each case a portion of such a trained Windscreen device to arrange.

A development of this embodiment provides that the two legs the windbreaker arcade into each other, so that sharp edges avoided in the transition of the two legs to each other in which, for example, wind currents are broken and in Direction can be deflected to the burner element.

Another embodiment of this invention Strahlungsbrenners has a windbreaker which is round or elliptical in cross-section is trained. It has proved to be very beneficial to have a corresponding Forming to choose, since this is the least vortex within the windscreen device is caused.

Finally, it is provided according to a further feature of the invention, that the windscreen device has an open area of 40 to 90%, in particular 50 to 80% of their total area. At this area ratio between open and closed area have the best Results with regard to the emitted radiant heat and in terms of the danger of extinguishing the flame by wind.

Figur 1

eine erste Ausführungsform eines Strahlungsbrenners in geschnitten dargestellter Seitenansicht;

Figur 2

den Strahlungsbrenner gemäß Figur 1 in einem Längsschnitt;

Figur 3

eine zweite Ausführungsform eines Strahlungsbrenners in einem Längsschnitt;

Figur 4

eine dritte Ausführungsform eines Strahlungsbrenners in einer geschnitten dargestellter Seitenansicht;

Figur 5

eine vierte Ausführungsform eines Strahlungsbrenners in einer geschnitten dargestellten Seitenansicht;

Figur 6

eine fünfte Ausführungsform eines Strahlungsbrenners in einer geschnitten dargestellten Seitenansicht;

Figur 7

eine Windschutzvorrichtung für einen Strahlungsbrenner gemäß Figur 6 in Draufsicht;

Figur 8

eine sechste Ausführungsform eines Strahlungsbrenners in geschnitten dargestellter Seitenansicht;

Fig. 9

eine siebte Ausführungsform eines Strahlungsbrenners in geschnitten dargestellter Seitenansicht und

Fig. 10

eine achte Ausführungsform eines Strahlungsbrenners in geschnitten dargestellter Seitenansicht.

Further features and advantages of the radiant burner according to the invention will become apparent from the following description accompanying drawings. In the drawing show:

FIG. 1

a first embodiment of a radiant burner in a sectional side view shown;

FIG. 2

the radiation burner according to Figure 1 in a longitudinal section;

FIG. 3

a second embodiment of a radiant burner in a longitudinal section;

FIG. 4

a third embodiment of a radiant burner in a sectional side view shown;

FIG. 5

a fourth embodiment of a radiant burner in a sectional side view shown;

FIG. 6

a fifth embodiment of a radiant burner in a sectional side view shown;

FIG. 7

a windbreaker for a radiant burner according to Figure 6 in plan view;

FIG. 8

a sixth embodiment of a radiant burner in a sectional side view shown;

Fig. 9

a seventh embodiment of a radiation burner in sectional side view and shown

Fig. 10

an eighth embodiment of a radiant burner in a sectional side view.

A radiant burner for gaseous fuels shown in FIG has a housing 1, in which a burner element 2 is arranged. The Burner element 2 is plate-shaped and consists of several juxtaposed ceramic plates containing a variety of combustion channels exhibit.

The burner element 2 is a feed line 3, a gaseous fuel which is mixed with air in a mixing tube 12 to form an ignitable To provide fuel-air mixture in the region of the burner element 2.

The housing 1 is formed in cross-section approximately V-shaped, wherein the housing expands starting from the burner element 2. At his one end, the housing 1, a reflector housing 5 with an opening 6 on. Through the opening 6, the generated by the burner element 2 occurs Heat radiation out. To the reflector housing 5 is a windbreaker 7 connected, the plate-shaped extension elements. 8 consists, which extend in the longitudinal direction of the opening 6 and the reflector housing 5 are attached. In addition, the windbreaker points 7 two further extension elements 9, which also plate-shaped are formed and between the extension elements. 8 extend, so that the extension elements 8 and 9 a total of a physical form a trained unit that extends in the direction of all three body axes of the housing 1 extends.

The extension elements 2 of the windshield 7 have a Variety of openings 10 square configuration. The openings 10 are formed by expressed portions 11, which portions 11 are each arranged above the relevant opening 10.

All sections 11 are at a certain angle relative to the extension element 8 and 9 aligned and prevent the attachment of Dust and other contaminants in the area of the openings 10. In the Embodiment according to Figures 1 and 2, the sections 11 are substantially formed strip-shaped.

Another embodiment of a radiation burner is shown in FIG. This embodiment of the radiant burner essentially corresponds the embodiment of the radiant burner according to the figures 1 and 2. The only difference between these two embodiments according to Figures 1 and 2 on the one hand and Figure 3 on the other hand in that the sections 11 in the embodiment according to Figure 3 in Cross-section V-shaped, wherein the free ends of the sections 11 substantially parallel to the respective extension element 8 and 9 are arranged running.

Another embodiment of a radiant burner is shown in FIG. It will be explained below on the detailed description of the radiant burner dispensed in the area of its housing 1. Basically, it can be be assumed that the radiation burner according to constructive The embodiments according to the figures 1 to 3 is configured. In addition, reference is made at this point to DE 41 16 898 A1, from the corresponding description of a usable here radiation burner is removable.

In the embodiment according to FIG. 4, the housing 1 adjoins the housing 1 Area of the reflector housing 5, the windbreaker 7 at. The windbreaker 7 consists of two the housing walls 13, which extend in the longitudinal direction of the housing 1, extending extension elements 8, wherein the extension elements 8 parallel to the housing walls 13 run.

Close to the extension elements 8 of the windbreaker 7 tapered aligned extension elements 14, the on their free end are connected to each other via a cover 15, so that overall a one-sided open in cross-section hexagonal shape the windscreen device 7 results. The windbreaker 7 is connected to the Housing 1 of the radiant burner connected, in particular screwed, so that the Winschutzvorrichtung 7 can be removed from the housing 1 if necessary is. Thus, the windbreaker 7 can also be already existing Radiation burners with corresponding housing 1 subsequently mounted or disassembled for maintenance purposes.

The extension elements 8 and 14 and the cover 15 are made Perforated plate. The perforated plate has openings 16 (Figure 7), the square are formed. Between the openings 16 narrow webs 17 are arranged, so that in total an opening degree of the perforated plate of about 60 up to 80% results. The extension elements 8 may differ from this, in particular smaller opening degree (30 to 60%).

The openings 16 in the extension elements 8 and 14 and in the Lid 15 serve the refraction and deflection of any air currents, which reach the radiant burner when used outdoors. Through the openings 16 in the extension elements 8, 14 and the cover 15 of the windshield 7 ensures that the broken and deflected airflows not at such a flow rate reach the area of the burner element 2 can, that there emerging at low speed from the jet surface Fuel-air mixture affected during its combustion becomes.

It can be used to optimize the refraction and deflection of the air currents be required, the perforated plate of the extension elements 8, 9 and / or 14 partially cover so that portions of the openings 16 closed are. For this purpose, for example, cover plates may be provided, the the windshield are fastened. In this context will pointed out that the windbreaker 7 according to FIG 4 frontally in each case two substantially hexagonal extension elements 9, the edge side with the extension elements eighth and 14 and the cover 15 are connected.

For stability reasons, the windbreaker 7 has a longitudinal direction extending subdivision element 18, which longitudinal edge side on the one hand in the transition region between the extension element. 8 to the extension element 14 and the other at the opposite Extension element 14 is attached. The partitioning element 18 is also formed as a perforated plate, so that the openings arranged therein continue to contribute, in the windbreaker 7 incoming Air currents break and distract.

A further embodiment of a radiation burner according to the invention is shown in FIG. In essence, this radiant burner is right consistent with the embodiment of FIG. There is a difference to see that the cover 15 is formed in cross-section V-shaped, to further improve the distraction and reduce the in the Windscreen device 7 penetrating air currents to achieve.

FIG. 6 shows a radiation burner which has a wind protection device 7, which is cuboid, so that its extension elements 8 and 9 are arranged at right angles to each other. The same applies to the cover 15, which is also perpendicular to the extension elements 8 and 9 is arranged.

In Figure 7, a cover 15 is shown in detail. The cover 15 consists of a frame 19, on which the perforated plate with the openings 16 and the webs 17 attached, in particular screwed or welded. Furthermore, the frame 19 has fastening elements 20 with which the Cover 15, for example, on the extension elements 8 and 9 fastened is.

Finally, in Figure 8, another embodiment of a radiant burner shown with two mixing tubes 12, which have a common Supply line 3 are supplied with fuel. The arrangement of two mixing tubes and a correspondingly larger number of burner elements 2 requires a much larger housing 1.

It can be seen that even with such a large housings 1, a windbreaker 7 is usable, the housing 1 in the region of a Opening 6 having housing part is arranged such that the entire Opening 6 is covered by the windbreaker 7.

In the embodiment according to FIG. 8, the wind protection device is provided 7 again from extension elements 8 and 9, the right angle to each other and parallel to the surface normal determined by the opening 6 Plain arranged and connected to the housing 1. The Extension element 8 and 9 thus form a cuboid frame. As a cover 15 is a perforated plate with openings 16 and webs 17 between adjacent openings 16 are provided. The cover 15 is plate-shaped formed and has at its edges on the extension elements 8 or 9 bent strip element.

In this embodiment, it can be seen that the openings 16 only are arranged in a portion of the extension elements 8 and 9 respectively. The remaining part of the extension elements 8 and 9 has no openings on, so that this is completely closed plate elements is.

A further embodiment of the radiation burner according to the invention is shown in FIG. This radiant burner essentially corresponds the embodiment according to the figure 1 and differs from this embodiment only by the design of the windbreaker 7th

This windbreaker 7 is starting from a longitudinal edge 21 of the Housing part 5 is formed substantially L-shaped and accordingly has two legs 22 and 23 on. The windbreaker 7 is over Z-shaped holding elements 24 screwed to the housing part 5.

The two legs 22 and 23 of the L-shaped wind protection device 7 go arcuate section into each other, so that in Transition region of the two legs 22, 23 no sharp edge arises, the one for the operation of such a radiant burner unfavorable turbulence within the windscreen device 7 or in the area can cause the opening 6.

The leg 23 of the windshield 7 is at least in the partial area aligned substantially parallel to the radiator opening 7, wherein the Orientation of the leg 22 on a wall 25 of the housing first oriented, to which the leg 22 is aligned parallel. The embodiment of the radiation burner according to FIG. 9 shows only at one longitudinal edge a windbreaker 7. Such an embodiment is particular then suitable if the radiant burner in one area is used, in the substantially matching wind directions available. In addition, in the region of the longitudinal edge 21 opposite Longitudinal edge 26 a second windbreaker 7 in identical Embodiment with two legs 22, 23 may be arranged, these second windscreen device 7 then mirrored to the first, in Figure 9 Windscreen device is arranged. Of course you can the two legs 23 of two oppositely arranged Windbreakers 7 are in communication with each other.

Finally, FIG. 10 shows a further embodiment of the invention Radiation burner shown, in turn, in its essential Construction with the radiant burner according to the figure 1 coincides. In contrast to the embodiment according to FIG. 1, in the case of the radiation burner According to FIG. 10, a wind protection device 7 is provided which, in the Cross-section is elliptical. The windbreaker 7 can hereby of interconnected perforated sheets with a perforation consist of Rundlöchem or made of an expanded metal with large free Cross section are produced. Alternatively to the elliptical embodiment of Windscreen device 7 may also be circular in cross-section be.

Claims (21)

1. Radiant burner, particularly for gaseous fuel, comprising a housing open on one side thereof for preparing a fuel-air mixture that is supplied via a device for supplying fuel and air, a burner element that is arranged in said housing and is particularly formed in a plate shape and includes numerous combustion channels, as well as a reflector housing adjoining the open side of said housing, and a wind protection device provided on said housing in the region of the open side thereof, said wind protection device (7) which extends from said particularly funnel-like housing part (5) in the direction of all three body axes (x, y, z) of said housing (1) and consists of a particularly heat-resistant material including a plurality of openings (10, 16) and/or recesses that are provided at least in partial areas of extension elements (8, 9, 14) of said housing part (5).
2. Radiant burner according to claim 1,
   characterized in that said wind protection device (7) includes in its part which is preferably aligned parallel with the open side of the housing a cover (15) which has a plurality of openings (16) and/or recesses.
3. Radiant burner according to claim 1 or 2,
   characterized in that said extension elements (8, 9, 14) and/or the cover (15) are formed plate-like.
4. Radiant burner according to claim 1,
   characterized in that said extension elements (8, 9, 14) are formed with a v-shaped cross section in the area of longitudinal edges of said particularly funnel-shaped housing part (5).
5. Radiant burner according to claim 1,
   characterized in that said extension elements (8, 9, 14) and/or said cover (15) consist of a perforated plate.
6. Radiant burner according to claim 5,
   characterized in that said perforated plate consists of expanded metal.
7. Radiant burner according to claim 5,
   characterized in that said perforated plate includes holes (16) of a polygonal, preferably rectangular and particularly square shape.
8. Radiant burner according to claim 5,
   characterized in that said perforated plate includes holes (16) having a boundary which is in the shape of a segment of an arc of a circle, particularly in a circular, oval and/or elliptical shape.
9. Radiant burner according to claim 2,
   characterized in that said cover (15) is formed with a v-shaped cross section.
10. Radiant burner according to claim 1,
    characterized in that said wind protection device (7) includes division elements (18) extending in the longitudinal and/or transverse directions.
11. Radiant burner according to claim 10,
    characterized in that said division elements (18) include a plurality of openings (16) and/or recesses at least in partial areas thereof.
12. Radiant burner according to claim 1,
    characterized in that said openings (10, 16) and/or recesses include lamella-like covers on the edges thereof which face the housing (1).
13. Radiant burner according to claim 12,
    characterized in that said covers are configured as plate sections (11) formed under an angle to the respective extension element (8, 9).
14. Radiant burner according to claim 13,
    characterized in that said plate sections (11) are formed with a v-shaped cross-section, the free ends of said plate sections (11) being arranged to extend substantially parallel with the respective extension element (8, 9).
15. Radiant burner according to claim 5,
    characterized in that the degree of opening of the perforated plates of said extension elements (8, 9, 14) and/or cover (15) is different.
16. Radiant burner according to claim 15,
    characterized in that the degree of opening of the perforated plates of said extension elements (8, 9) is smaller than the degree of opening of the perforated plates of said extension elements (14) or said cover (15).
17. Radiant burner according to claim 1,
    characterized in that said reflector housing (5) is formed funnel-like.
18. Radiant burner according to claim 1,
    characterized in that starting from a longitudinal edge (21) of the housing part (5) said wind protection device (7) is substantially formed in an L-shape and accordingly includes two legs (22, 23), of which the free leg (23) is at least partly aligned parallel with the radiator opening (6).
19. Radiant burner according to claim 18,
    characterized in that said two legs (22, 23) of said wind protection device (7) merge into one another in the form of a segment of an arc of a circle.
20. Radiant burner according to claim 1,
    characterized in that said wind protection device (7) is formed with a round or elliptical cross section.
21. Radiant burner according to claim 1,
    characterized in that said wind protection device (7) has an open area of 40 to 90%, particularly 50 to 80% of its total area.

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