DE29720168U1 - Gas grill - Google Patents

Description

Description :

The invention relates to a gas grill according to the preamble of claim 1.

Gas grills with multiple burners are mostly designed so that the burners can be operated independently of one another. Each burner has its own control device for opening, closing and regulating the gas supply. The burners can therefore be switched on, off and their burn intensity can be changed independently of one another. Each burner on such a gas grill must be lit separately. If this is done manually, there is a risk of the burners still being hot or at least one of them already being used.

BREMEN MUNICH GERMANY ALCANTE Hollerallee 73 Widenmsyersiraße 48 Business Park/Keplerstrasse 10-12 Explanada de Espasa J,5° Dsha, D-28209 Bremen D-80538 Munich D-07549 Gera E-03002 Alicante/ Spain

This can be switched off if an electric ignition device is provided, but this is required for each burner and an ignition button must be pressed each time a new burner is started up.

In order to avoid the disadvantages mentioned, grills with several burners are known that have an ignition transfer between neighbouring burners. After a first burner

&iacgr;&ogr; has been ignited, the neighboring burner can be ignited automatically by the flame or hot gas from the burner that is already in operation reaching the neighboring burner (after the gas supply has been switched on) along the ignition bridge, which then ignites it automatically. The individual ignition bridges lead to increased costs in the manufacture of such gas grills.

The invention is based on the object of creating a gas grill with several burners that enables reliable automatic ignition of additional burners using simple means.

A gas grill serving to solve this problem has the features of claim 1. Because the ends of each

2s burners are operatively connected to an ignition transfer device, a single ignition transfer device is sufficient to ignite the other burners automatically after one burner has been ignited. The single ignition transfer device for all burners has a relatively large volume due to the length it must have in order to be operatively connected to all burners, which can hold enough gas to ensure reliable, automatic ignition of other burners under all circumstances.

According to an advantageous embodiment of the invention, the single ignition transfer means is connected to open ends of at least one burner tube of all burners on the same side. This is preferably a gas-conducting connection, so that the open ends

the burner tubes, the ignition transfer medium can be supplied with sufficient gas and the flame or hot gas can reach the burner to be ignited from a burner that is already in operation.

The ignition transfer means is preferably designed as an elongated ignition transfer pipe that extends transversely to the burner pipes and can thus be connected to the same ends of all burner pipes. The only ignition transfer pipe for preferably all burner pipes of each burner ensures reliable further transport of the gas flame in particular for the ignition of neighboring burners. An uncontrolled escape of gas from the ignition transfer pipe can thus be avoided. At least opposite free

The front sides of the ignition transfer tube are preferably closed or sealed to prevent uncontrolled escape of gas.

The ignition transfer pipe is preferably provided with exposed openings in at least one side wall. These openings can be installed where they are required to ensure reliable automatic ignition of other burners. In particular, flames can emerge from the openings of the ignition transfer pipe and be supplied with oxygen so that ignited, i.e. burning gas from the burner already in operation can reach the neighboring burner via the ignition transfer pipe and ignite it automatically.

An ignition transfer means according to a further preferred embodiment of the invention is designed as an elongated ignition transfer rail. The ignition transfer rail can be easily manufactured, in the simplest case consisting of an L-shaped angle profile, for example. However, it is also conceivable to form the ignition transfer rail from a profile that is open on one side, for example a U-profile. However, all other commercially available elongated profiles that have one or two open sides can also be considered.

The ignition transfer rail extends beyond the end areas of all burners, in particular the burner tube bends of U-shaped burners. At least one horizontal or essentially horizontal leg of the ignition transfer rail extends beyond the end areas of all burners, in particular the burner tube bends. In this way, the ignition transfer rail can guide the gas, which is usually heavier than air, from one burner to the other. Hot gas or burning gas can thus flow under the ignition transfer rail from a burner that has already been ignited to the burner that is to be ignited.

The ignition transfer rail, which at least partially covers the end areas of all burners and extends from one burner to the other, does not have to be connected to the burners. This considerably simplifies the manufacture of the gas grills according to the invention, because conventional burners can be used and only the gas transfer rail is additionally required, which may only be attached to the housing or frame of the gas grill.

Advantageous further developments of the gas grill according to the invention are set out in the subclaims.

Two preferred embodiments of the gas grill are explained in more detail below using the drawing. This shows:

Fig. 1 is a schematic plan view of a first embodiment of a gas grill,

Fig. 2 is a plan view of a second embodiment of a gas grill, and

Fig. 3 shows an enlarged section III-III through the gas grill of Fig. 2.

The gas grill shown in Fig. 1 has three burners 10, 11 and 12 arranged at a distance from one another in a common horizontal plane. However, the invention can also

are used for gas grills with a different number of burners, especially more than three burners.

The burners 10, 11 and 12 are arranged in a common housing, which in the embodiment shown is a frame 13 that is largely open at the top and bottom and has a rectangular base. The frame 13 completely surrounds the burners 10, 11 and 12.

&iacgr;&ogr; Each of the identically designed burners 10, 11 and 12 is made of tubes. In the embodiment shown, each burner 10, 11 or 12 has two parallel burner tubes 14, 15. The burner tubes 14 and 15 are each connected to one another by a gas feed pipe 16, which extends transversely between the burner tubes 14 and 15 of the respective burner 10, 11 or 12. The gas feed pipe 16 is arranged at a distance from opposite ends of the burner tubes 14 and 15. A gas supply pipe 17 leads to the gas feed pipe 16, which is guided approximately centrally between the parallel burner tubes 14 and 15 and merges centrally into the gas feed pipe 16 running transversely thereto. The burner tubes 14, 15, the gas feed pipe 16 and the gas supply pipe 17 lie in a common horizontal plane.

Free ends 19 of the burner tubes 14 and 15 of all burners 10, 11 and 12 pointing towards an operating side 18 of the gas grill end at a distance from a front panel 20 of the frame 13 pointing towards the operating side 18. The free ends 19 of all burner tubes 14 and 15 lie on a common (imaginary) line that runs parallel to the front panel 20. The gas supply pipes 17 protrude with their ends pointing away from the gas feed pipes 16 beyond the free ends 19 of the burner tubes 14, 15. The gas supply pipes 17 are connected to a gas supply pipe 24 via gas valves 21, 22, 23 (not shown in detail). The gas supply pipe 24 extends transversely under the gas valves 21, 22 and 23 at the ends of the gas supply pipes 17 of all burners 10, 11 and 12 and thus runs parallel to the front panel 20. An open connection end 25 of the gas supply pipe 24 is laterally outwardly from the frame 13

led out to connect an external gas supply line. The opposite end 26 of the gas supply pipe 24 is closed.

Each gas valve 21, 22 and 23 is assigned a rotary knob 27, 28 and 29. The rotary knobs 27, 28 and 29 assigned to a specific burner 10, 11, 12 are located on the outside in front of the front panel 20 of the frame 13 and are guided to the respective gas valve 21, 22 and 23 by actuating shafts 30, 31 and 32. The corresponding burner 10, 11 and 12 can be switched on and off using a rotary knob 27, 28 and 29. By operating the rotary knobs 27, 28 and 29 between the on and off positions, the amount of gas flowing to the respective burner 10, 11 or 12 can be changed.

In the gas grill shown here, an ignition device 33, which can be an electric piezo igniter, is assigned to a single burner, namely the left burner 10 in Fig. 1. The ignition device 33 has an ignition button 34 attached to the outside of the front plate 20 of the frame 13, which is connected to an ignition head 36 via a line 35. The ignition head 36 is assigned next to the outer burner tube 14 of the burner 10, in the area of the free end 19.

Each burner tube 14 has a row of holes 37 on its upper side with a large number of equally spaced, vertically aligned through holes

38 for gas to escape. The burner tubes 14 and 15 are sealed gas-tight at their free ends 19 pointing towards the operating side 18.

The two burner tubes 14 and 15 of all burners 10, 11 and 12 are connected to each other by a single ignition transfer means, which in the gas grill of Fig. 1 is an ignition transfer tube

39. Alternatively, it is also conceivable to connect only one burner tube 14 or 15 of each burner 10, 11 and 12 to the ignition transfer tube 39. The ignition transfer tube 39 is directed away from the operating side 18 (rear) front

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rarely 40 of the burner tubes 14 and 15. The ignition transfer tube 39 running transversely behind the burner tubes 14 and 15 is connected gas-tight to the end areas of the burner tubes 14 and 15, in such a way that all burner tubes 14 and 15 or at least one burner tube 14 or 15 of each burner 10, 11 and possibly also 12 protrude with a short end section 63 into the ignition transfer tube 39 (Fig. 1). The end faces 40 of all or only some of the burner tubes 14, 15 can be closed. The decisive factor is

&iacgr;&ogr; that at least one through hole 38 on the top of each or only one burner tube 14, 15 per burner 10, 11 or 12 is located in the area of the end sections 63 in the ignition transfer tube 38 so that a flame can reach the ignition transfer tube to ignite the next burner 11 or 12. A

The vertical side wall 45 of the ignition transfer tube 39, which preferably has a square cross-section and faces the end faces 40 of the burner tubes 14 and 15, has openings 42 corresponding to the cross-section of the burner tubes 14 and 15. The end regions 63 of the burner tubes 14 and 15 enter the interior of the ignition transfer tube 39 through the openings 42. The ignition transfer tube 39 also has openings 43 in its two upright side walls 44 and 45. These openings 43 are directed horizontally and serve to allow air to enter the ignition transfer tube 39 so that the flame on the burner 10, which has been ignited for example, can propagate to the adjacent burner 11, which is still to be ignited (or from the burner 11 to the burner 12). It is also conceivable to arrange openings 43 only in one side wall 44 or 45. Furthermore, it is conceivable to alternatively or additionally provide openings in the horizontal bottom wall of the ignition transfer tube 39.

The gas grill shown in Fig. 2 and 3 according to a second embodiment of the invention differs from the gas grill in Fig. 1 only in the design of the three burners 46, 47 and 48 and the ignition transfer means, which here is an ignition transfer rail 49. Otherwise, the gas grill in Fig. 2 and 3 corresponds to the gas grill shown in Fig. 1 and described above. Therefore, the same parts are given the same

Reference numbers are provided and reference is made to the description of the corresponding parts of the gas grill in Fig. 1.

The three burners 46, 47 and 48 are also arranged next to each other at an equal distance in a horizontal plane. Each of the three identically designed burners 46, 47 and 48 is U-shaped in plan view. Each burner 46, 47 and 48 has two burner tubes 50, 51 that are parallel to each other and run transversely to the operating side 18 and a burner tube bend 52 that has an approximately semicircular shape and connects the parallel burner tubes 50, 51 of the respective burner 46, 47 and 48 to one another. The burner tubes 50, 51 and the burner tube bend 52 of each burner 46, 47, 48 are made in one piece.

is designed, i.e. bent from a tube. Free ends 53 of the burner tubes 50, 51 also point towards the operating side 18.

A gas feed pipe 54 is arranged between the parallel burner tubes 50 and 51 of each burner 46, 47, 48. The gas feed pipe 54 runs parallel to the burner tubes 50 and 51, i.e. it lies on the longitudinal center axis of the respective burner 46, 47, 48 and is therefore also located in the common horizontal plane of all burners 46, 47, 48. An end 55 of each gas feed pipe 54 pointing away from the operating side 18

2s is connected centrally to the burner tube bend 52 of each burner 46, 47, 48, both mechanically and fluidically. As a result, gas from the gas feed pipe 54 passes directly into the center of the burner tube bend 52, where the gas flow branches off into the two burner tubes 50, 51.

An end 56 of each gas feed pipe 54 pointing towards the operating side 18 is led to the gas valve 21, 22 and 23 assigned to each burner 46, 47, 48. The gas valve 21, 22 and 23 of each burner 46, 47 and 48 can be operated independently of one another via the corresponding rotary knob 27, 28 and 29 and the actuating shafts 30, 31, 32, whereby the burners 46, 47 and 48 can be switched on and off as required and their heat output can be adjusted.

The free ends 53 of all burner tubes 50, 51 pointing towards the front plate are also sealed gas-tight here. Furthermore, each burner tube 50, 51 has an upper row of holes 37. Each row of holes 37 has evenly spaced through holes 38 that are directed vertically upwards and extend continuously both over all burner tubes 50, 51 and over the respective burner tube bend 52 of at least the burners 46 and 47. In Fig. 2, the row of holes 37 of only one (left) burner tube 50 is shown in full. Regardless of the representation, however, the other burners 46, 47 and 48 also have a continuous row of holes 37 with through holes 38 pointing upwards.

is The ignition transfer rail 49 in the gas grill shown here has a U-shaped cross-section (Fig. 3). It runs across the burner tubes 50, 51 and is assigned to the end areas of all burners 46, 47, 48 pointing away from the front panel 20. The ignition transfer rail 49 extends approximately over the entire width of the gas grill and has open end faces 57, each of which ends a small distance from the corresponding walls of the frame 13. However, it is also conceivable to lead the end faces 57 of the ignition transfer rail 49 up to the corresponding walls of the frame 13 and to attach the ignition transfer rail 49 to them.

The ignition transfer rail 49 extends over the end areas of all (three) burners 46, 47 and 48 in such a way that opposite, horizontal legs 58, 59 of the ignition transfer rail 49 cover the end areas of the burner tube bends 52 of all three burners 46, 47 and 48. The end areas of the burner tube bends 52 of all burners 46, 47, 48 thus protrude into the open side 60 of the ignition transfer rail 49 facing the operating side 18. The web 61 opposite the open side 60 for connecting the legs 58 and 59 of the ignition transfer rail 49 runs at a slight distance behind the burner tube bends 52 of all burners 46, 47 and 48. The height of the ignition transfer rail 49 is offset from the level of the burners 46, 47, 48 in such a way that the lower,

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horizontal leg 59 of the ignition transfer rail 49 rests under all three burner tube bends 52. If necessary, the ignition transfer rail 49 can be attached with its lower leg 49 to the underside of the burner tube bends 52. The upper, horizontal leg 58 of the ignition transfer rail 49 runs due to the height offset of the ignition transfer rail 49 at a distance above the tops of the burner tube bends 52. In this way, a relatively large volume is created in the laterally open interior of the ignition transfer rail 49 above the burners 46, 47, 48 &iacgr;&ogr;, in which sufficient gas can collect in order to reliably ensure the reliable ignition of further burners 47 or 48 from the burner 46 or 47 that is already in operation.

is For gas to enter the ignition transfer rail 49, at least the burners 46 and 47, preferably all three burners 46, 47, 48, have at least one upward-facing through hole 62. These through holes 62 are located at the ends 55 of the gas feed pipes 54 connected to the respective burner tube bends 52, whereby the through holes 62 extend from the upper, horizontal leg 58 of the ignition transfer rail

49 (Fig. 3). However, it is also conceivable to cover the through holes 38 of the rows of holes 37 of the burner tubes

50 and 51 at least over the burner tube bends 52 of the burners 46 and 47, so that gas can get into or under the ignition transfer rail 49. These through holes 38 in the burner tube bends 52 can be provided in addition to the through holes 62; but can also replace the through holes 62.

It is conceivable to provide the ignition transfer rail 49 with other cross-sections, for example a C-shaped cross-section or only an L-shaped cross-section, whereby the lower, horizontal leg 59 of the ignition transfer rail 49 shown in Figs. 2 and 3 would then practically be eliminated.

Applicant:

Landmann GmbH & Co. KG Am Binnenfeld 3

27711 Osterholz-Scharmbeck

13 November 1997/8319 LAD-57-EN

Reference list

10 burner 37 Hole row 11 burner 38 Through hole 12 burner 39 Ignition transfer tube 13 Frame 40 Front side 14 Burner tube 42 opening 15 Burner tube 43 opening 16 Gas feed pipe 44 Side wall 17 Gas supply pipe 45 Side wall 18 Operating page 46 burner 19 free end 47 burner 20 Front panel 48 burner 21 Gas valve1 49 Ignition transfer rail 22 Gas valve1 50 Burner tube 23 Gas valve1 51 Burner tube 24 Gas supply pipe 52 Burner pipe bend 25 Connection end 53 free end 26 End 54 Gas feed pipe 27 Rotary knob 55 End 28 Rotary knob 56 End 29 Rotary knob 57 Front side 30 Actuating shaft 58 leg 31 Actuating shaft 59 leg 32 Actuating shaft 60 open page 33 Ignition device 61 web 34 Ignition button 62 Through hole 35 Line 63 End section 36 Ignition head

Claims (28)

Expectations: 1. Gas grill with several burners (10, 11, 12; 46, 47, 48) arranged next to one another at a distance from one another, which can be switched on and off independently of one another, characterized by an ignition transfer means which is connected to one end of each burner (10, 11, 12; 46, 47, 48). 2. Gas grill according to claim 1, characterized in that each burner (10, 11, 12) two parallel burner tubes (14, 15) of which at least one, preferably both, is connected to a common gas feed pipe (16). BREMEN MUNICH GERMANY ALCANTE Holleralice 73 Widenmayerstrasse 48 Commercial Park/Keplerstrasse 10-12 Pasco Explanada de España 3,S° Dcha. D-28209 Bremen D-80538 Munich D-07549 Gera E-O30O2 Alicante/Spain 3. Gas grill according to one of the preceding claims, characterized in that open end faces (40) of the burner tubes (14, 15) of all burners (10, 11, 12) located on the same side are connected to the ignition transfer means. 4. Gas grill according to one of the preceding claims, characterized in that the open end faces (40) of the respective burner tubes (14, 15) are connected to the same, single ignition transfer means. 5. Gas grill according to one of the preceding claims, characterized in that at least the free ends (19) of all burner tubes (14, 15) facing away from the ignition transfer means are closed. 6. Gas grill according to one of the preceding claims, characterized in that the ignition transfer means is designed as an elongated ignition transfer tube (39) which preferably runs transversely to the burner tubes (14, 15). 7. Gas grill according to one of the preceding claims, characterized in that the burner tubes (14, 15), preferably all burner tubes (14, 15), and the ignition transfer tube (39) are connected to one another in a manner allowing gas exchange. 8. Gas grill according to one of the preceding claims, characterized in that the ignition transfer pipe (39) extends over the area of the burner pipes (14, 15) of all burners (10, 11, 12), preferably is connected to end areas of all burner pipes (14, 15) or a burner pipe (14 or 15) of each burner (10, 11, 12). 9. Gas grill according to one of the preceding claims, characterized in that the ignition transfer pipe (39) has openings (42) at the points of connection to the burner tubes (14, 15) which correspond to the cross section of the burner tubes (14, 15). &Iacgr; : 10. Gas grill according to one of the preceding claims, characterized in that the end regions of at least one burner tube (14, 15) of the burners (10, 11) arranged in front of the last burner (12), preferably all burner tubes (14, 15), open into the ignition transfer tube (39). 11. Gas grill according to one of the preceding claims, characterized in that end sections (63) of the end regions of at least one burner tube (14, 15) of the &iacgr;&ogr; the burners (11, 12) arranged in the last burner (12) preferably all burner tubes (14, 15) protrude into the ignition transfer tube (39) or are located in the ignition transfer tube (39). 12. Gas grill according to one of the preceding claims, characterized in that the ignition pipe inside (39) located end sections (63) of at least one burner tube (14, 15) of the burners (10, 11) arranged in front of the last burner (12), preferably of all burner tubes (14, 15), have at least one preferably upwardly directed through-bore (38). 13. Gas grill according to one of the preceding claims, characterized in that opposite end faces of the ignition transfer tube (39) are closed or sealed gas-tight. 14. Gas grill according to one of the preceding claims, characterized in that the ignition transfer tube (39) has exposed openings (43). 15. Gas grill according to one of the preceding claims, characterized in that the ignition transfer tube (39) has at least two opposite, upright side walls (44, 45), of which at least one of the upright side walls (44 or 45) has the exposed openings (43). 16. Gas grill according to one of the preceding claims, characterized in that each burner (46, 47, 48) has an approximately U-shaped tube, the legs of which are designed as two parallel burner tubes (50, 51) which at adjacent ends are connected to each other by a burner tube bend (52). 17. Gas grill according to one of the preceding claims, characterized in that each burner (46, 47, 48) is assigned a gas feed line, preferably a gas feed pipe (54), the gas feed line or the gas feed pipe (54) opening into the respective burner pipe bend (52) for connecting the burner pipes (50, 51). 18. Gas grill according to one of the preceding claims, characterized in that the single ignition transfer means is assigned to all burner tube bends (52) or all burners (46, 47, 48). 19. Gas grill according to one of the preceding claims, characterized in that the ignition transfer means is designed as an elongated ignition transfer rail (49) which runs transversely to the burner tubes (50, 51). 20. Gas grill according to one of the preceding claims, characterized in that the ignition transfer rail (49) at least partially overlaps, preferably at least partially covers, the burner tube bends (52) of all burners (46, 47, 48). 21. Gas grill according to one of the preceding claims, characterized in that the ignition transfer rail (49) is open on at least one side, preferably has a C-shaped, U-shaped or L-shaped cross-section. 22. Gas grill according to one of the preceding claims, characterized in that end regions of all burner tube bends (52) of all burners (46, 47, 48) protrude through an open (wall) side (60) of the ignition transfer rail (49) into the same. 23. Gas grill according to one of the preceding claims, characterized in that a horizontal leg (58) of the ignition transfer rail (49) covers the end regions of the burner tube bends (52) of all burners (46, 47, 48). 24. Gas grill according to one of the preceding claims, characterized in that the leg (58) of the ignition transfer rail (49) covering the end regions of all burner pipe bends (52) s runs horizontally at equal distances above the underlying end regions of the burner tube bends (52). 25. Gas grill according to one of the preceding claims, characterized in that in the case of an ignition transfer rail (49) with a U- or C-shaped cross section, a second (lower) horizontal leg (59) lies closely below the end regions of the burner tube bends (52), preferably being connected to the same. is 26. Gas grill according to one of the preceding claims, characterized in that the end regions of the burner tube bends (52) of all burners (46, 47, 48) projecting into the ignition transfer rail (49) have at least one opening (through hole 62) for gas outlet. 27. Gas grill according to one of the preceding claims, characterized in that the end regions of the gas feed pipes (54) adjacent to the burner tube bends (52) have at least one through-bore (62) for gas outlet. 28. Gas grill according to one of the preceding claims, characterized in that the or each through hole (62) points upwards as seen in the gas outflow direction.