EP2444726A2 - Gas burner for a gas hob, gas hob and method for operating such a gas hob - Google Patents

Abstract

The burner (14) has a gas burner body (15) comprising gas outlet opening (16), where a disk type thermogenerator (25) is arranged above the gas burner body. The thermogenerator has same shape as a gas burner. The thermogenerator is held above the gas burner body by a flexible/resilient holding unit and pushed upward to bear against a lower face of a pot (30) that is located above the gas burner, where an abutment is subjected to action of a spring force. The gas burner openings are arranged in a plane, where the thermogenerator is arranged parallel to the plane of the burner openings. Independent claims are also included for the following: (1) a gas cooktop comprising a gas burner (2) a method for operating the gas cooktop.

Description

The invention relates to a gas burner for a gas hob, a gas hob provided therewith and to methods for operating such a gas hob.

Thermal generators per se are known for generating electrical energy. For this purpose, a hot side of the thermogenerator is heated or heated, while on a cold side, the heat is removed or discharged. Although an efficiency of such a thermogenerator is usually only 3% to 5%, considerably more thermal energy has to be conducted through the thermogenerator than electrical energy is obtained. On the other hand, sufficient thermal energy is available in many applications.

From the DE 10 2007 058 945 A1 It is known to install a thermogenerator on a gas burner in a gas hob. There the thermal energy, which is passed through the thermogenerator, is dissipated against the gas hob. The cold side of the thermogenerator thus goes against the gas hob, which is heated on the one hand, which is negative. Furthermore, this thermal energy is lost to the cooking process.

Task and solution

The invention has for its object to provide a gas burner mentioned above, a gas hob and method for operating such a gas hob, with which problems of the prior Technique can be avoided and in particular an efficient and structurally simple way is created by means of a thermogenerator to generate electrical energy to a gas burner of a gas hob.

This object is achieved by a gas burner with the features of claim 1, a gas hob with the features of claim 10 and methods having the features of claims 14 to 16. Advantageous and preferred embodiments of the invention are the subject of further claims and are explained below. Some of the features mentioned below are explained only for the gas burner, the gas hob or one of the methods. However, they should be able to apply regardless of both gas burner, gas hob and the procedures. The wording of the claims is incorporated herein by express reference.

According to the invention, a gas burner, which has a conventional gas burner body with gas outlet openings, a thermogenerator arranged above it. The thermogenerator may be arranged particularly advantageously concentric with the gas burner body and / or have the same shape or the same or similar size. This makes it possible that the thermal generator is acted upon at its hot side with thermal energy from the gas burner body itself, which would otherwise be introduced upwards into a cooking vessel positioned above the gas burner. The cold side of the thermogenerator is cooled, so to speak, by this cooking vessel. This is done either by radiating the heat to the overlying bottom of the pot or, in a preferred embodiment of the invention, characterized in that the thermal generator rests with the cold side to the bottom of the pot. This can be achieved particularly preferably by yielding or resilient holding means which hold the thermogenerator above the gas burner body and, in particular, press against the underside of the cooking vessel.

Here, it has been found in the context of the invention that, although a directly applied to the top of the gas burner body thermogenerator can very well absorb the thermal energy. However, since it is mechanically relatively difficult, while at the same time to reach a plant on the underside of a raised pot to remove the thermal energy on the cold side again, it is considered cheaper to use thermal radiation for entry of thermal energy and to discharge the thermogenerator with its cold side directly to the bottom of the pot. A spring device provided for this purpose, which can be designed in many ways, but advantageously for temperature resistance consists of metal and thus may be formed, for example, as a plate spring or coil spring may be provided in the gas burner body at its top.

Advantageously, a thermogenerator is disk-shaped, wherein its diameter is considerably larger than its thickness or height. Particularly advantageously, the thermal generator is arranged approximately parallel to the plane of the gas burner openings. This then usually means that it is arranged parallel to a pot bottom, which is especially advantageous for its good investment.

In one embodiment of the invention can be provided that the thermal generator is designed to be larger than the gas burner body or laterally beyond this. Thus, the gas flames emerging from the gas outlet openings can be at least partially used for heating the thermal generator on its hot side, so that the coupling of the thermal energy takes place very well. If the thermogenerator is very close to its hot side at the top of the gas burner body, then the transition of the thermal energy is also very well possible and it can be achieved that even this is enough without the gas flame would have to reach directly to the thermogenerator ,

As an alternative to the above-described possibilities, a lower first heat-conducting element can be arranged between the gas burner or the gas burner body and the thermogenerator. This is advantageously also disk-shaped and arranged so that it is arranged approximately parallel to the plane of the gas burner openings, that is preferably also parallel to the thermal generator, and at a distance therefrom. The first heat-conducting element should rest directly on the hot side of the thermogenerator for the best possible initiation of the thermal energy. The first heat-conducting element can also be larger than the gas burner body, as has been described above for a possible embodiment of the thermal generator, so that the gas flames heat the heat-conducting element directly. For this purpose, this laterally at least 10% of the diameter of the gas burner body or a ring of the gas burner openings survive, preferably a maximum of 20%. Thus, the lower first heat conducting element can capture, as it were, a part of the thermal energy and give it to the thermogenerator, which is generated by the gas burner by means of the gas flames, so as to heat the raised pot on its bottom of the pot.

In a further embodiment it can be provided that the lower first heat-conducting element has holes and / or recesses in its edge region in the manner of incisions with projections located therebetween. Such an edge of the first heat-conducting element may be formed substantially like a gear. This can serve to ensure that the protruding projections are, so to speak, heated particularly strongly by the gas flames running underneath. Depending on the power design, the holes or recesses may lie above the gas flames, so that they can burn substantially between the projections and, as a side effect, heat the projections. This ensures that a large part of the thermal energy generated by the gas burner is coupled into the bottom of the pot. Alternatively it can be provided that the projections lie directly above the gas flames or the gas burner openings forming these. she However, should survive only so far laterally over the gas burner body, that only for small gas flames corresponding to a low power level, the projections are strongly heated for sufficient at this low power level coupling of thermal energy into the thermogenerator. If a higher power level is selected, the gas flames burn stronger or longer and reach far beyond the projections, which are still heated. However, then a large part of the thermal energy generated by the gas flames goes as desired in the bottom of the pot.

In yet another embodiment of the invention may be provided above or at the top of the thermal generator, ie on the cold side, another upper second heat conducting element. This is particularly advantageous also disk-shaped as well as the thermogenerator or as the above-described first heat conduction. It may advantageously also be about as large as the thermogenerator itself, alternatively again slightly larger, similar to the first heat-conducting element. Thus, a particularly good transfer of thermal energy from the cold side of the thermal generator to the bottom of the pot can be done. However, the upper second heat-conducting element should not be too large, so that the gas flames generated by the gas burner can still provide sufficient and rapid heating of the pan bottom. The second heat-conducting element also serves to better conduct heat, this time away from the thermal generator to the bottom of the pot.

In a basic embodiment of a gas burner, this is a so-called single-burner with a single gas burner body and a single grouping of gas burner openings therein, which are provided as usual annular on its outer periphery.

A spring device can advantageously also be provided on a removable cover of a gas burner body, for example also Thus, this assembly of cover for the gas burner body, optionally with a spring and the thermogenerator and possibly including the above-described heat-conducting, set and removed. This is advantageous if for the gas hob according to the invention only a single such unit should be provided for cost reasons, so that it is then used in each case on the gas burner to be operated.

In another alternative embodiment of the invention, the gas burner is designed as a dual-circuit burner. It has an inner gas burner body and an outer gas burner body. The thermal generator is arranged above the inner gas burner body, since this is usually always in operation when the gas burner is working. Advantageously, a gas flame is not controllably formed on the inner gas burner body, but always works with such a designed thermal power that the thermal generator generates a required electrical power. A gas flame is controllably formed on the outer gas burner body, so that in the event that work is to be carried out with a power exceeding the thermal output of the first inner gas burner body, the second outer gas burner body is switched on, so to speak. In this way it can be ensured that the required thermal energy is always applied to the thermogenerator during operation of this dual-circuit burner and thus the required electrical power is generated. The operation with a minimum thermal power on the gas burner body also applies to the above-described single-burner burner.

In a further embodiment of the invention, it is possible to form the thermogenerator itself as a pot carrier or as part of such a pot carrier. For this purpose, it can be arranged immovably in the vertical direction on the gas burner, so that it is just stable to put on a pot. Advantageously, the thermogenerator is centered over the Arranged gas burner body and has outgoing connections to supports on the gas hob below, advantageously three for a secure state. In an outer area around the thermogenerator around even more support points for the pot are provided so that it rests not only on the thermogenerator , In this case, the thermogenerator should be thermally insulated as possible to the other parts of the pot carrier out, so that the thermal energy to be taken on the cold side is introduced into the pot as possible. Thus, it can be avoided that too much thermal energy is withdrawn from the heating process of the pot.

As has been described above, the thermal generator can advantageously be designed to be detachable on its own or as a structural unit together with a part of the gas burner body, such as its lid. This is possible on the one hand for a case in which it is not needed at all, for example because the gas hob is connected to a power grid. Furthermore, it can thus be achieved above all that not every gas burner of a gas hob should be provided with such a heat generator, but less or particularly advantageously only a single one.

In a gas hob according to the invention it is provided that the thermal generator has an electrical connection to a power supply of the gas hob. This should be designed to be thermally resistant enough to be guided advantageous laterally away from the thermogenerator down to the gas hob. Since it is inevitably hit by the gas flames of the gas burner, it is important to ensure sufficient thermal insulation. For one thing, she should cross the gas flame as far as possible above it. On the other hand, electrical and thermal insulation can have a glass fiber fabric and plastic or the like. dispense or only highly heat-resistant plastic such as silicone or the like. exhibit.

The control of the gas hob is advantageously an electronic control, which has, for example, in addition to storable program sequences electronically controlled and evaluated touch switch. Furthermore, an energy store in the form of a rechargeable battery is advantageously included in the energy supply or has such an energy store. Thus, a potentially generated surplus of electrical energy may be stored by the thermal generator for the commencement of operation of the gas burner or gas hob needed for electronic control before the thermogenerator can actually generate it.

In an advantageous embodiment of the invention, the gas hob for igniting the gas burner have electrical ignition devices. Furthermore, facilities such as flame monitoring or the like. be provided.

In an advantageous further embodiment of the invention, a gas hob can have both single-burner and dual-circuit burners, in particular as described above.

In yet another advantageous embodiment of the invention, the gas hob can be designed so that it can be operated without electrical connection to a power grid. Under certain circumstances, it may even be designed without any electrical connection or connection cable. Then, the electrical energy for operation of the aforementioned control and possibly also the gas valves or other functional devices is removed solely from said accumulator. This must always be kept as charged as possible. Such a gas hob can advantageously also be operated in places or in an environment which, although having a gas supply, for example by a gas cylinder, however not connected to the mains. Also for mobile gas hobs, for example for camping, so is the invention.

Especially for charging an aforementioned accumulator, it may be advantageous to interpret the electrical power of the thermal generator higher than the actual actual power consumption of the control of the gas hob or electric gas valves or the like. Thus, excess electrical energy of the thermal generator can be stored in the energy storage for further operation ,

As previously mentioned, electrically or electronically controlled gas valves are advantageously provided in the gas hob. These can be designed so that in the case of a previously described dual-circuit burner with a minimum power setting, only the inner gas burner is ignited and burns with a certain thermal power. This thermal power is designed so that the thermogenerator works well and can advantageously generate the necessary electrical power to supply the electronic control or operates with the best possible efficiency. So can be charged in addition to the supply of the gas hob itself and the said energy storage. Upon further opening of the gas valve of the inner gas burner, it burns with higher thermal power, which then ignites with further increase of the outer gas burner and its thermal performance is thus fully adjustable.

In a method according to the invention for operating a gas hob described above, electrical energy can thus be obtained not only by means of the thermogenerator, without removing too much thermal energy for heating the pot. Rather, with the thermogenerator also other functions can be achieved. For example, for a pan detection function, it can be checked whether a pot is placed over the gas burner by monitoring the thermoelectric voltage. Will the cold side of the thermogenerator That is, when the gas burner is working, it is not cooled by a raised pot base, so there is no or very little thermoelectric voltage at the thermogenerator. Since a controller can check whether the gas burner is working and based on the position of the gas valve also, with which gas flow rate and with which thermal power, it can be seen that just no pot is set up. This can be evaluated by the controller as a missing pot and possibly as a signal or the like. be issued.

In a further embodiment of a method for operating a gas hob described above, in turn, the thermoelectric voltage can be monitored at the thermal generator and so the temperature of the pot bottom of the erected pot are monitored. Namely, this temperature determines the temperature at the cold side of the thermal generator and thus the generated thermal voltage. It can be provided that, after a longer phase of an approximately constant pot bottom temperature because of approximately constant thermoelectric voltage during operation of the gas burner in the case of a subsequent rapid increase in temperature by increasing the thermoelectric voltage, the control concludes that the set-up pot is cooked empty. Thus, the temperature of his pot bottom increases sharply. The controller can then output a corresponding signal and, for example, switch off the gas burner.

In yet another inventive method for operating a gas hob with a dual-circuit burner can be provided that the controller detects the thermal performance of the gas burner. For this purpose, the gas flow rate to the gas burner can be monitored, advantageously by detecting the passage or an open position of the gas valve. This in turn can be compared with the electrical power delivered by the thermogenerator or the thermoelectric voltage. From this, the pot bottom temperature can be determined at least approximately, in particular its relative course. Advantageously, the above-described measured variables or the detected and determined values can be used to control cooking processes.

These and other features will become apparent from the claims and from the description and drawings, wherein the individual features each alone or more in the form of sub-combinations in an embodiment of the invention and in other fields be realized and advantageous and protectable Represent embodiments for which protection is claimed here. The subdivision of the application into individual sections as well as intermediate headings does not restrict the general validity of the statements made thereunder.

Brief description of the drawings

Fig. 1

eine erste Ausführung eines erfindungsgemäßen Gasbrenners in einem erfindungsgemäßen Gaskochfeld als Einkreisbrenner mit Wärmeleitelement und Thermogenerator darüber,

Fig. 2

eine weitere erfindungsgemäße Ausbildung eines Gasbrenners mit einem Thermogenerator, der Teil eines Topfträgers ist und

Fig. 3

einen weiteren erfindungsgemäßen Gasbrenner, der als Zweikreisbrenner ausgebildet ist.

Embodiments of the invention are shown schematically in the drawings and will be explained in more detail below. In the drawings shows:

Fig. 1

a first embodiment of a gas burner according to the invention in a gas hob according to the invention as a single-burner burner with heat-conducting element and thermogenerator above,

Fig. 2

a further inventive design of a gas burner with a thermogenerator, which is part of a pot carrier and

Fig. 3

a further gas burner according to the invention, which is designed as a dual-circuit burner.

Detailed description of the embodiments

In Fig. 1 a gas hob 11 is shown with a hob plate 12. It has, according to a first embodiment of the invention, a gas burner 14, which consists of a gas burner body 15 with gas outlet openings 16, which are arranged as usual annular therein. The gas burner 14 is supplied by means of a gas supply line 18 whose gas passage is controlled by an electrically controllable gas valve 19. The gas valve 19 is controlled by a controller 20 of the gas hob 11. This controller 20 can either be designed solely for this gas burner 14 alone or for all gas burners or advantageously for the entire gas hob 11.

On the upper side of the gas burner 14 or the gas burner body 15, which, for example, by a removable cover, not shown here odgl. may be formed by means of a spring 21, which is shown here only schematically as a helical spring, a heat conducting element 23 is held above the gas burner 14. This heat-conducting element 23 is disk-shaped and although it is slightly larger than the gas burner body 15, but not much. The heat-conducting element consists of a material which conducts heat well, for example aluminum or copper, under certain circumstances also die-cast.

On the upper side of the heat-conducting element 23, a thermogenerator 25 is arranged with surface contact thereon, in such a way that it sits centrally thereon and thus concentric with the gas burner body 15. The thermogenerator 25 is disc-shaped and significantly thicker than the heat-conducting element 23, which however it does not have to be that way. Connecting lines 27 of the thermal generator are shown schematically and go laterally from him and are guided to an energy storage 29 of the gas hob 11. The energy store 29 in turn is connected to the controller 20. He has an accumulator, not shown, or other loadable energy storage. Furthermore, the controller 20 can be powered not only by the energy storage 29 with energy, but also directly by the thermal energy generated by the thermogenerator 25 or electrical energy. In order that the connecting lines 27, which are clearly guided laterally clear of the gas flames 17, are thermally sufficiently resistant to them, they can have a temperature-resistant insulation. On the one hand, this may be an electrically non-conductive or poorly conductive oxide surface on a metal, so that two metal lines or metal wires as connecting lines 27 emerge from the thermal generator 25. Alternatively, it may also be common metal wires with a sufficiently good electrical and thermal insulation by a surrounding glass fiber fabric or the like. Alternatively, high-temperature resistant silicone mixtures can be added or used.

From the Fig. 1 It can also be seen that the thermogenerator 25 rests with its upper surface and directly on the underside of a pot bottom 31 of a pot 30. For a good concern just the spring 21 is provided. As previously explained, the thermal generator 25 thus has its hot side at the bottom. Here, thermal energy from the gas burner 14 or from the gas flames 17 via the heat-conducting element 23 to the hot side is introduced into the thermal generator 25. At the cold side, which rests resiliently by the spring 21 on the pot bottom 31 of the pot 30, the thermal energy is released again in the pot bottom 31 inside. Thus, on the one hand, the thermogenerator 25 is cooled by the bottom of the pot 31 for the temperature difference necessary for operation. At the same time, the thermal energy is not lost to the heating process, but is just about the detour through the thermogenerator 25 in the actual target, namely the pot bottom 31 and the pot 30, registered.

Similar to the lower heat-conducting element 23, a further heat-conducting element can also be provided on the upper side of the thermal generator 25, namely in order to improve the release of the thermal energy from the thermal generator 25 to the pot bottom 31. However, this actually only makes sense if this heat-conducting element is considerably larger would be as the thermogenerator to distribute the thermal energy emitted by this thermal energy to a larger area of the pot bottom 31. Although this would improve the release of thermal energy from the thermal generator 25 and thus its efficiency. At the same time, however, the heat input from the gas burner 14 or the gas flames 17 into the bottom of the pan 31 is thereby impaired, so that it is actually not advisable to do so. Rather, the size of the thermogenerator 25 should be such that, as shown, it is somewhat smaller in diameter than the gas burner body 15 and thus as the ring of the gas outlet openings 16.

The main improvement in the efficiency of the thermogenerator 25 and increase in the electrical power generated by it is via the lower heat conducting element 23, which is more heated so to speak by the gas burner 14 and the gas flames 17 by its larger diameter than that for the thermogenerator 25 alone would apply. For this purpose, as has been described, the heat-conducting element 23 have a shape which deviates from a circular disk corresponding to the ring of gas outlet openings 16. For example, protrusions and recesses may be provided in the manner of a toothed wheel, wherein these are advantageously matched to the gas outlet openings 16. The gas outlet openings 16 namely determine the course of the gas flame 17. Either the projections can be just above the gas outlet opening 16 and thus above the gas flames 17 for a particularly good heating. Alternatively, they can be just between them to be heated by some of them for a sufficiently good coupling of thermal energy in the thermogenerator 25. At the same time they do not escape the warming up of the pot bottom 31 but not too much energy.

The spring 21, the heat-conducting element 23 and the thermogenerator 25 advantageously form, together with the connection lines 27, an independent one Unit. Either each gas burner of the gas hob 11 has such a unit, so that in each case when operating a gas burner and electric power for the energy storage 29 is generated, in which case of course all thermal generators are connected to the same energy storage 29.

To save this effort, but can also be provided that this assembly is removable from the gas burner 14 and the gas burner body 15, for example, by the removable lid, or is formed integrally with the lid. Furthermore, either the connecting lines 27 may be long enough to reach each gas burner of the gas hob. Alternatively, the connecting lines 27 can be plugged in and out via detachable plug connections on the gas hob 11 or on the hob plate 12 as an electrical connection.

This assembly with the thermogenerator 25 is then attached to each of the gas burner, which is to be operated. So it can be ensured that whenever any gas burner of the gas hob 11 burns, also electrical energy is generated. The electrical energy of the energy accumulator 29 can also be used to operate the gas valve 19, which is controlled by the controller 20.

A simpler embodiment of the gas hob described is an embodiment without heat-conducting or heat-conducting. Although this is less effective, because the thermogenerator is heated only partially and also unevenly. By saving the Wärmeleitblechs but a much cheaper structure can be realized.

In a further alternative embodiment of a gas hob 111 according to FIG Fig. 2 a gas burner 114 is similar to that one Fig. 1 shown with a gas burner body 115, gas outlet openings 116 and gas flames 117. The gas hob 111 also has a thermal generator 125, which is, however, formed like an annular, so with an opening in the middle, but this would not necessarily be so. Above all, however, the thermogenerator 125 is connected radially outwardly with pot support arms 133, of which, for example, four pot support arms 133 may be provided as usual and form a cross together with the thermogenerator 125. The pot 130 can then be placed with its pot bottom 131. Between the thermogenerator 125 and the pot support arms 133 insulating parts may be provided which prevent a thermal short circuit of the outer legs of the thermal generator by the pot support arms.

Radially outside the pot support arms 133 are placed on pot support posts 134, wherein Dämmteile 136 are disposed between these two. This is intended to ensure that the outside of the pot support arms 133 is not too much thermal energy to the pot support posts 134 and thus in the hob plate 112 is discharged. For one thing, it would only bother you or cause damage. Furthermore, it would be missing for heating the pot 130.

Not shown in Fig. 2 are connecting cables of the thermal generator 125 and gas valve, control and energy storage accordingly Fig. 1 , However, they can be provided in the same way as is easily imaginable. Connecting lines for the thermal generator 125 can either run very close to the pot support arms 133 and the pot support posts 134 and thus also be a piece away from the gas flames 117. Alternatively, they can also run in these, if they are hollow, and thus be very well protected.

The advantage of the arrangement 2 is that no mechanically movable parts are provided. However, just the construction of the pot carrier is more expensive and it is for each gas burner 114 a separate thermal generator 125 provided.

Furthermore, the thermogenerator 125 could also be formed as a continuous closed disc similar to in FIG Fig. 1 , In a further embodiment, a heat-conducting element could again be provided on the underside, possibly also on the upper side, as in FIG Fig. 1 shown and described. Such a heat-conducting element would be advantageous above all on the underside of the thermal generator 125, that is to say on the hot side.

In Fig. 3 a further modification of the invention in a gas hob 211 is shown, namely, a gas burner 214 is designed as a so-called dual-circuit burner here. It therefore has an internal gas burner 214a and an external gas burner 214b, as is known in principle. The smaller inner gas burner 214a with a gas burner body 215a and gas outlets 216a is located above the larger outer gas burner 214b. But this need not be so, they could also be arranged concentrically in approximately the same level.

On top of the inner gas burner 214a and the gas burner body 215a, a thermal generator 225 is arranged with a lower heat-conducting element 223a, which is slightly smaller and is designed as a downwardly beveled disc. The thermogenerator 225 in turn lies with its upper side, ie the cold side, flat and directly on the underside of a pot bottom 231 of a pot 230, which is to be heated. The pot 230 stands on the pot support posts 234 shown outside.

The second outer gas burner 214b has a gas burner 215b with gas outlet openings 216b, from which large and long gas flames 217b occur. While the smaller gas flames 217a of the inner gas burner 214a at least partially act on the heat conducting element 223 and the thermal generator 225, the outer gas flames 217b of the outer gas burner 214b go exclusively to the Pot bottom 231 or couple thermal energy exclusively in this one. The thermal generator 225 is thus supplied or heated exclusively by the internal gas burner 214a.

As well as in Fig. 2 are also in Fig. 3 not shown, the gas valves for supplying the two gas burners 214a and 214b, control, energy storage and electrical connection lines for the thermogenerator 225. However, you can also as in Fig. 1 be provided. Furthermore, can also in Fig. 3 the thermal generator 225 may be either fixed or detachable to the gas burner 214a.

Regarding the operating possibilities of the two gas burners 214a and 214b as a dual-circuit burner according to Fig. 3 has already been sufficiently executed at the beginning. Just like the gas burners in the Fig. 1 and 2 Also, the internal gas burner 214a should always burn with such thermal performance that, in one illustrated configuration, the thermal generator 225 generates sufficient energy to operate a controller accordingly Fig. 1 , possibly also an electrically operated gas valve. In a two-circuit burner as in Fig. 3 However, most of the thermal energy is usually generated by the outer gas burner, so that the low thermal power loss by the provision of the thermal generator 225 is not negative.

Possible evaluation methods at the thermogenerators by the control for temperature measurement or pan detection have also been described in detail at the beginning. - - - - - - - - - -

Claims (17)

Gas burner for a gas hob, with a gas burner body having gas outlet openings, characterized in that above the gas burner body, in particular concentric thereto and / or with the same shape or size, a thermal generator is arranged. Gas burner according to claim 1, characterized in that the thermal generator is held with yielding or resilient holding means above the gas burner body and is pushed up to the spring-loaded system on the underside of a pot located above the gas burner. Gas burner according to claim 1 or 2, characterized in that the thermal generator is disc-shaped and is preferably arranged approximately parallel to the plane of the gas burner openings. Gas burner according to one of the preceding claims, characterized in that between gas burner and gas burner body and the thermal generator, a lower first heat conducting element is arranged, which is preferably disc-shaped and is arranged approximately parallel to the plane of the gas burner openings at a distance therefrom, in particular the lower first Wärmeleitelement is greater than the gas burner body. Gas burner according to claim 4, characterized in that the lower first heat-conducting element in its edge region holes and / or recesses in the manner of incisions, in particular gear-like or star-like. Gas burner according to one of the preceding claims, characterized in that above or at the top of the thermal generator, a further upper second heat conducting element is provided, which is preferably disc-shaped and is about as large as the thermal generator itself. Gas burner according to one of the preceding claims, characterized in that it is designed as a single-burner burner with a single gas burner body and a single ring of gas burner openings therein. Gas burner according to one of claims 1 to 6, characterized in that it is designed as a dual-circuit burner with an inner gas burner body and an outer gas burner body, wherein the thermal generator is disposed above the inner gas burner body, wherein preferably a gas flame on the inner gas burner body is not controllable, but always works with a thermal performance designed so that the thermal generator generates a required electrical power, in particular an outer gas burner body is designed to be adjustable. Gas burner according to one of the preceding claims, characterized in that the thermal generator is designed as a pot carrier or part of a pot carrier and is arranged immovably to the gas burner in particular in the vertical direction. Gas hob with at least one gas burner according to one of the preceding claims, characterized in that the thermal generator has an electrical connection to a power supply of the gas hob, wherein the power supply to a controller, in particular an electronic Control, the gas hob is connected and preferably has an energy storage. Gas hob according to claim 10, characterized in that it is designed without electrical connection or electrical connection option to a power grid, wherein it preferably has for firing its gas burner electrical ignition devices. Gas hob according to claim 10 or 11, characterized in that the electrical power of the thermal generator is designed to be higher than the actual power consumption of the control of the gas hob for storing the excess electrical energy of the thermal generator in the energy storage. Gas hob according to one of claims 10 to 12, characterized in that for gas supply of the gas burner electronically controlled electric gas valves are provided which are designed such that at a minimum power setting in a gas burner in the form of a dual-circuit burner according to claim 8, the inner gas burner is ignited and burns with a certain thermal power, which is designed so that the thermal generator generates the necessary electrical power to supply the electronic control, the inner gas burner burns on further opening of the gas valve with higher thermal power and then the outer gas burner ignitable and in its thermal Performance is adjustable. Method for operating a gas hob according to one of claims 10 to 13, characterized in that it is checked as Topfferkennungsfunktion whether a pot is placed over the gas burner, by in the event that the cold side of the Thermoqenerators not by an established and created pot is cooled, no or only a very low thermoelectric voltage on the thermogenerator arises and this signal is evaluated as a recognized missing pot from the control of the gas hob. A method for operating a gas hob according to any one of claims 10 to 13, characterized in that from the course of the thermoelectric voltage at the thermogenerator, the temperature of the pot bottom of the erected pot is monitored and the controller after a longer phase of a constant pot bottom temperature during operation of the gas burner and a subsequent rapid rise in temperature concludes that the pot is empty and emits an appropriate signal and turns off the gas burner. Method for operating a gas hob according to one of claims 10 to 13, characterized in that the controller detects the thermal power generated at the gas burner via the gas flow rate to the gas burner, preferably by detecting the passage or the opening position of the gas valve, and with the output from the thermal generator comparing the electric power and from this the pot base temperature is determined. Method according to one of claims 14 to 16, characterized in that the detected measured variables are used for controlling cooking processes.

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