Cooking oven with a specifically positioned temperature sensor outside the cooking cavity

Abstract

The invention relates to exemplary embodiments of cooking appliances (1) having a muffle (8) and a housing (2).

Description

[0001] Aspects of the invention relate to a cooking appliance. The cooking appliance comprises a housing and a muffle arranged on the housing. The muffle, with its walls, defines a cooking chamber within the appliance.

[0002] Cooking appliances, such as ovens, microwave ovens, or steam cookers, have a metal muffle. To keep the muffle's weight to a minimum, the walls are made as thin as possible. Conventional cooking appliances allow heating elements to be located either inside the cooking chamber, as is the case with top heating elements and / or grill heating elements, or outside the muffle, as with bottom heating elements. With resistance heating elements, a significant amount of heat is transferred directly to the muffle walls. This can lead to deformation of the muffle.

[0003] Furthermore, in known cooking appliances, top heating elements can also be arranged outside the cooking chamber. For example, such a device is known from DE 10 2010 039 342 A1. Similarly, US 2019 / 0045590 A1 discloses a cooking appliance which has a top heating element composed of several separate heating units.

[0004] Even in cooking appliances where a top heating element is located outside the muffle and, in particular, above a ceiling wall of the muffle, insulating material is also arranged in a space between the ceiling wall of the muffle and a ceiling wall of the cooking appliance housing. Another cooking appliance with a specific top heating element is known from DE 10 2015 225 928 A1.

[0005] The EP 2 789 923 A1 shows a household oven with an integrated water evaporator.

[0006] The furnace has an evaporation cavity as a bulge in a bottom wall of a furnace chamber, wherein the heating power of an evaporation heating element is adjusted to evaporate a volume of water to be evaporated that corresponds to the volume of the bulge. EP 2 789 923 A1 thereby discloses the preamble of independent claim 1.

[0007] The object of the present invention is to create a cooking appliance which is improved with regard to thermal management, in particular the protection of specific components of the cooking appliance, during the operation of a heating element of the cooking appliance.

[0008] This problem is solved according to the invention by a cooking appliance which has the features according to claim 1.

[0009] One aspect of the present disclosure relates to a cooking appliance. The cooking appliance has a housing, which can also be referred to as the outer housing. The cooking appliance also has a muffle, which is a separate component from the housing. The muffle is located within the housing. The muffle, with its walls, defines a cooking chamber within the cooking appliance. In particular, this cooking chamber is directly defined, at least in part, by the walls of the muffle.

[0010] In particular, the cooking appliance has at least one heating element. The heating element is, in particular, formed in a strand-like or rod-like manner and is bent multiple times. In one embodiment, the at least one heating element is arranged outside the muffle. It is, in particular, arranged in a space between the housing and the muffle. Specifically, the heating element is spaced apart from a wall of the muffle facing and adjacent to the heating element within this space. This wall is the wall of the muffle closest to the heating element.

[0011] In one embodiment, the cooking appliance features a spacer unit. This unit is designed and intended to position the heating element at a defined or discretely predetermined distance from the wall of the muffle within this space. Thus, a heating element is arranged outside the cooking chamber and, moreover, is positioned in a defined manner without contact with the outer surface of the muffle wall within this space. This allows for particularly precise adjustment and control of the heating element's position relative to the wall. Especially when the heating element, due to its strand-like and multiply coiled shape, extends over a surface oriented parallel to the muffle wall, a very precise and uniform distance to this wall can be set for the entire heating element.The surface oriented parallel to the wall of the muffle is, in particular, the one in which the heating element, with its strand-like and coiled shape, extends. This means that the heating element is arranged within this extension area to at least 80%, and in particular at least 90%. Even during operation, this ensures that the distance to the wall of the muffle remains constant or substantially constant. Specifically, this spacer unit is positioned between the heating element and the wall. This enables direct coupling between the spacer unit and the heating element, as well as the muffle. Very precise positioning and mechanically stable mounting are also achieved as a result.

[0012] With such a spacer unit, it is possible to achieve a highly precise positioning relative to the wall, especially for heating elements located outside the muffle. This allows the heat emitted by the heating element to be transferred more evenly and across the entire surface of the wall with a specific heat profile, particularly when the heating element is a resistance heater. This improves the heating of the muffle wall, which in turn improves the heat transfer from the wall into the cooking chamber. This results in a more uniform heat distribution from the wall into the cooking chamber. Undesirable or unevenly positioned hot spots are thus effectively avoided.

[0013] Furthermore, such a spacer unit allows this position to be precisely and permanently adjusted. Even when the heating element is in operation and emitting significant heat, the position relative to the wall, which may deform, can be maintained very consistently with minimal tolerances.

[0014] In one embodiment, the spacer unit includes spacer bars. These bars are oriented with their longitudinal axes projecting, at least partially, away from the surface spanned by the main surface area of ​​the heating element. Here, as in the other examples, this surface can be flat or curved. The bars are therefore primarily not oriented in the plane, or rather, do not primarily extend in the plane in which the heating element primarily extends. Spacer bars allow for the creation of a very delicate spacer unit, enabling a space-saving and weight-reduced design. Furthermore, the bars provide mechanically stable elements that can maintain the desired, defined distance between the heating element and the adjacent wall of the muffle.The rods are also very insensitive to the heat that occurs, so that unwanted deformations of the rods can be avoided.

[0015] Furthermore, such spacer rods allow for particularly precise mechanical connections with other components of the cooking appliance. This results in mechanically stable connections. Consequently, the spacer unit itself can be positioned with pinpoint accuracy and fixed within the cooking appliance. The orientation of the spacer rods also allows for very precise adjustment of their length. This, in turn, results in a very precise adjustment of the distance between the heating element and the wall of the cooking chamber.

[0016] In one embodiment, at least one spacer rod has a bend at one end facing away from the heating element. This bend is formed as a mounting coupling part.

[0017] In one embodiment, the bend particularly represents a freely cantilevered end piece of the spacer rod.

[0018] In one embodiment, the spacer unit, with this bend, rests on the side of a feedback element of the cooking appliance facing the heating element. This positioning is specifically designed for distance-adjusting coupling. In particular, this bend sits directly on this side of the feedback element. Although a rod is used as the element of the spacer unit in this embodiment, this bend allows for line contact, rather than just point contact, with this side of the feedback element. This enables a mechanically stable coupling, resulting in improved positional fixation.

[0019] In one embodiment, the bend is arranged at an angle between 80° and 100°, particularly between 85° and 95°, relative to the remaining area of ​​this spacer bar that adjoins it to the rear. Such an angle of the spacer bar also enables a very stable and uniform fit on this side facing the counter-coupling element.

[0020] In one embodiment, at least one spacer rod has a bend at one end facing away from the heating element. In this embodiment, this bend is formed as a rear-engaging coupling element. With this rear-engaging coupling element, the spacer unit, when assembled, rests behind a counter-coupling element of the cooking appliance on the side facing away from the heating element. Here, too, this mechanical coupling is provided for distance-adjusting coupling, particularly direct coupling. Such a rear-engaging coupling enables a mechanically stable and very precise positional connection of the spacer unit to the counter-coupling element. This ensures very precise positioning.

[0021] This positional fixation and precise arrangement of the spacer unit on the feedback element is particularly advantageous when one spacer bar is equipped with a rear-engaging coupling part and another with a top-mounted coupling part. This allows the feedback element to be mechanically contacted from both sides by corresponding bent sections of the spacer bars, resulting in a particularly stable mechanical connection. Furthermore, these two bends create a clamping or clamping hold for the spacer unit on the feedback element, thus ensuring optimal positional stability and mechanically sound mounting.Especially when the heating element might experience deformations and / or changes in position due to high heat during operation, this mechanical connection is particularly advantageous in order to minimize or counteract such deformations and changes in position.

[0022] In one embodiment, the counter-coupling element has a continuous recess, particularly one that is open at the edges. The spacer bar, with a section formed before the bend, extends through this recess, so that the interlocking coupling element adjoining the bar section is located on the side of the counter-coupling element facing away from the heating element. This also contributes to the compact and mechanically stable design of this mechanical connection. The bar section, which in particular connects to the interlocking coupling element, is thus also mechanically stabilized. This also results in a higher degree of slip resistance relative to the counter-coupling element. The fixed position of the spacer unit on the counter-coupling element is further enhanced by this arrangement.

[0023] In one embodiment, the counter-coupling element is arranged, in particular clamped, between the mounting coupling part and the rear-engaging coupling part. The advantages achievable thereby have already been explained above. In particular, this achieves positional fixation in at least one, in particular at least two, and preferably all three spatial directions.

[0024] In one embodiment, the spacer unit for fixing the position of the heating element on at least one feedback element of the cooking appliance is configured in at least two, and in particular all three, spatial directions. In particular, the spacer unit is directly coupled to the feedback element. This also advantageously supports the mechanically stable arrangement.

[0025] In one embodiment, the spacer unit has a height in a direction perpendicular to the surface spanned by the main surface of the heating element that is many times greater than the thickness of a strand of the heating element. This allows the spacer unit to be positioned flexibly, as its height ensures a sufficient distance between the heating element and the wall of the muffle, which is adjacent to and, in particular, parallel to the heating element. This also allows the spacer unit to be attached directly to elements of the cooking appliance that are not the wall of the muffle from which the heating element is to be spaced.

[0026] In one embodiment, the heating element is positioned by the spacer unit at a distance from the outer surface of the adjacent wall that is between 0.8 and 1.5 times the thickness, particularly the diameter, of one strand of the heating element. In another embodiment, the heating element may be positioned by the spacer unit at a distance from the outer surface of the adjacent wall that is between 0.3 mm and 0.7 mm, particularly between 0.3 mm and 0.5 mm. Such a distance setting ensures that the heating element and the wall are always in contact with each other, even when the heating element is in operation. Furthermore, this distance is specified to allow for particularly high heat transfer from the heat generated by the heating element to the wall.This results in a very advantageous energy transfer and thus a very high efficiency in heating this wall of the muffle.

[0027] Furthermore, a very compact design can still be achieved, especially in terms of the height of the cooking appliance. This is particularly true if the heating element is positioned vertically in a space between the top wall of the muffle and the top wall of the housing.

[0028] In one embodiment, the cooking appliance has position-locking elements that are directly connected to the multiple strand sections of the heating element, thus fixing these strand sections in position relative to one another. This prevents undesired deformation of the heating element and, in particular, undesired relative movement of the strand sections. This results in a particularly advantageous maintenance of the heating element's shape.

[0029] In one embodiment, position-locking elements are formed as position-locking bars. In particular, a spacer bar of the spacer unit is arranged at opposite ends of a position-locking bar in one embodiment. Specifically, the spacer bar is arranged at an angle to the end of the position-locking bar. Such a position-locking bar thus provides a multifunctional component. On the one hand, it holds the strand sections of the heating element in position relative to each other; on the other hand, it serves as a direct receiving element for a spacer bar.

[0030] In one embodiment, a positioning locking bar and a spacer bar may be formed in one piece. For example, this could be a metal bar. In one embodiment, the spacer bar is arranged with its longitudinal axis at an angle between 85° and 95° to the longitudinal axis of the positioning locking bar.

[0031] In one embodiment, a positioning rod and two spacer rods are formed in one piece. In particular, together they form a U-shaped support and positioning rod. This allows such a complete rod to be mechanically arranged, or clamped, on opposite areas of a feedback element. The mounting is thus further improved.

[0032] In particular, several such U-shaped support and positioning rods are arranged. A support frame can therefore also be formed from several such support and positioning rods.

[0033] In one embodiment, the spacer unit is coupled to at least one counter-coupling element of the cooking appliance for position fixing. In this embodiment, the counter-coupling element is formed as a flange projecting from the outside of the muffle. In this embodiment, a strip-shaped web, projecting laterally, particularly in the width direction of the cooking appliance, is formed, representing this counter-coupling element. It can be provided that such a flange extends over the entire depth of one wall of the muffle when viewed in the depth direction of the cooking appliance. This can be continuous. As a result, the counter-coupling element is inherently stable and rigid. This enables a particularly stable direct mechanical coupling with a spacer bar, in particular with several spacer bars, especially with a rear-engaging coupling element and a top-mounted coupling element.

[0034] In one embodiment, this flange is arranged downwards relative to a ceiling wall of the muffle, which forms the wall adjacent to the heating element, when viewed in the vertical direction of the cooking appliance. In particular, this flange is arranged on an outer side of at least one side wall of the muffle. In another embodiment, this flange is arranged downwards relative to a tub ceiling of the muffle, which forms the wall adjacent to the heating element, when viewed in the vertical direction of the cooking appliance. In particular, this flange is arranged on an outer side of a tub collar of a tub-shaped ceiling wall of the muffle. This means that the contact point or coupling point between a spacer rod and the counter-coupling element is arranged downwards relative to this tub ceiling when viewed in the vertical direction, but is nevertheless formed on the ceiling wall itself.This also improves the mechanical coupling and the fixed positioning of the spacer unit. The ceiling wall can then be individually manufactured and shaped, and the flange can be integrated into the design.

[0035] In one embodiment, the heating element is a top heating element and / or grill element of the cooking appliance. It is particularly advantageous if the heating element is a resistance heating element. Such heating elements generate heat energy themselves through the input of electrical energy. Temperatures of the heating element can exceed 650°C, particularly 700°C, and optionally temperatures up to or even above 750°C. The invention is especially advantageous with such heating elements that are resistance heating elements. This is because, when such a heating element is positioned outside the cooking chamber, sufficient heat must be generated to indirectly heat the cooking chamber via the muffle wall. Thus, the heating element, located outside the cooking chamber, also exerts a correspondingly high thermal energy, and therefore corresponding heat, directly on the adjacent wall of the muffle.Especially with a top-heating and / or grill element, the top wall of the muffle needs to be heated to the desired and necessary temperature in order to radiate heat into the cooking chamber. Therefore, with such a design, it is particularly advantageous to position the resistance heating element at a distance from the adjacent wall. This prevents undesirable thermal effects, especially localized deformations, on the muffle caused by sections of the heating element resting against it. Furthermore, in such configurations, it is also highly beneficial if the heating element and the muffle are positioned very precisely relative to each other during operation and remain so.

[0036] Another aspect of the present disclosure relates to a cooking appliance. The cooking appliance has a housing, which can also be referred to as the outer housing. The cooking appliance also has a muffle, which is a separate component from the housing. The muffle is located within the housing. The muffle, with its walls, defines a cooking chamber within the cooking appliance. In particular, this cooking chamber is directly defined, at least in part, by the walls of the muffle.

[0037] In particular, the cooking appliance has at least one heating element. The heating element is, in particular, formed in a strand-like or rod-like manner and is bent multiple times. In one embodiment, the at least one heating element is arranged outside the muffle. It is, in particular, arranged in a space between the housing and the muffle. Specifically, the heating element is spaced apart from a wall of the muffle facing and adjacent to the heating element within this space. This wall is the wall of the muffle closest to the heating element.

[0038] A thermal shielding unit for the cooking appliance is located in the space between the heating element and the housing. This unit effectively and as intended thermally shields the heating element from the housing. In one embodiment, the material of this thermal shielding unit has a melting point higher than the maximum operating temperature of the heating element. Therefore, this thermal shielding unit contains at least a portion of material with a melting point higher than the maximum adjustable operating temperature of the heating element. This advantageously allows for the thermal insulation of such a heating element, located outside the cooking chamber and particularly a resistance heating element, from the housing.Even at very high temperatures that can occur during operation of the heating element, an advantageous thermal shield is achieved between the heating element and the housing.

[0039] In particular, this specific choice of material for the thermal shielding unit prevents the material from melting during operation of the heating element. This is especially advantageous when the thermal shielding unit is in direct contact with the heating element, at least in some areas. Such a design results in a particularly compact cooking appliance, at least in terms of height, and also prevents any undesirable damage to the thermal shielding unit, especially at the high temperatures of a resistance heating element.

[0040] In one embodiment, the material of the thermal shielding unit is at least partially rock wool. Preferably, the thermal shielding unit is made entirely of rock wool. This material has a particularly high melting point. Therefore, it can be used particularly advantageously when the heating element is a resistance heater that can operate at temperatures exceeding 700°C. In particular, the material is needle-punched rock wool. It also contains an inorganic binder. The material has a density between 80 g / m³ and 120 g / m³.

[0041] In one embodiment, the thermal shielding unit is a mat made of fibrous material. This mat is preferably elastically deformable. This allows it to adapt to the installation conditions in a particularly advantageous way. Furthermore, it can be installed in direct contact with the heating element with particular advantage. The mat can be shaped in a variety of ways.

[0042] In one embodiment, the thermal shielding unit has a thickness between 12 mm and 18 mm, particularly between 13 mm and 17 mm, and especially 15 mm. This allows the shielding unit to be designed relatively thin. This also saves installation space while still providing sufficient thermal insulation without the heat from the heating element impairing the thermal shielding unit's function during operation. Preferably, this thickness is provided in an upper cavity where a top heating element and / or grill is arranged. A further thermal insulation unit, for example, glass wool, can also be arranged there. This results in a multi-layered composite of different thermally insulating materials.

[0043] In one embodiment, the thermal shielding unit has a thickness between 35 mm and 45 mm, particularly between 38 mm and 42 mm, and especially 40 mm. Preferably, this thickness is provided in a lower cavity area in which a bottom heating element is arranged. This then makes it possible to arrange only this thermal shielding unit.

[0044] In one embodiment, the thermal shielding unit, as explained above, is in direct contact with the heating element. This is possible precisely when the aforementioned conditions are met, namely the higher melting point of the shielding unit material compared to the maximum operating temperature of the heating element.

[0045] In one embodiment, the thermal shielding unit is arranged only on the side of the heating element facing away from the muffle, in the space between the heating element and the housing. It is essential in this context that the heating element, located outside the cooking chamber, can transfer maximum heat energy to the adjacent wall of the muffle. Thermal insulation would negatively affect the efficiency of the heating element in this case. On the other hand, the area of ​​the heating element facing away from the muffle and located between the heating element and the housing should be thermally insulated as effectively as possible. This is also important to prevent the housing from overheating and thus avoid undesirable deformation.

[0046] In one embodiment, the heating element, viewed from a planar perspective, lies parallel to the nearest wall of the muffle, which is arranged adjacent to the heating element and extends, in particular at least substantially, and especially completely, over a planar area that is parallel to the main extensional area of ​​the heating element.

[0047] In one embodiment, the thermal shielding unit comprises a metal plate or a metal mesh. This can be made particularly thin, resulting in a very compact design. In another embodiment, the metal plate can also incorporate an infrared reflector. Furthermore, in another embodiment, the metal plate can protect a thermal insulation element located in the space between the heating element and the housing, specifically between the metal plate and the housing. Therefore, in another embodiment, such a metal plate or metal mesh is also suitable for use as this type of thermal shielding unit.

[0048] In one embodiment, at least one thermal insulation unit, separate from the thermal shielding unit and / or differing in at least one material parameter, is arranged in the space between the wall of the muffle and the wall of the housing.

[0049] In general, and not only in the embodiment mentioned here, the wall of the muffle, which is to be considered in each case, and the wall of the housing are arranged in parallel or substantially parallel planes to each other. Thus, in each case, an intermediate space or an intermediate space region is considered, which is bounded by parallel and spaced-apart walls, namely, on the one hand, the wall of the muffle and, on the other hand, the wall of the housing. These extend, in particular, parallel to each other.

[0050] This thermal insulation unit provides advantageous thermal insulation to the housing. In one embodiment, this thermal insulation unit is located only in the area of ​​the gap between the heating element and the housing wall. Specifically, the thermal insulation element is positioned between the thermal shielding unit and the housing wall. The thermal shielding unit allows this additional thermal insulation element to be functionally and materially selected to have a lower melting point than the maximum operating temperature of the heating element. This is because the intervening thermal shielding unit separates the thermal insulation element from the heating element. Therefore, a simpler and potentially more cost-effective thermal insulation material can be used for this thermal insulation unit.

[0051] In one embodiment, the thermal insulation unit may be a mat made of fibrous material. For example, it may contain glass wool or be made entirely of glass wool.

[0052] In one embodiment, the thermal insulation unit is thicker than the thermal shielding element or the thermal shielding unit. The material of the thermal shielding unit is, in particular, different from, or even completely different from, the material of the thermal insulation unit.

[0053] In one embodiment, the thermal shielding unit and the insulation unit are separate components. However, they can be arranged directly adjacent to each other in the space between them.

[0054] As mentioned above, in one embodiment the maximum operating temperature of the heating element is greater than 500°C, in particular greater than 700°C, and in particular between 700°C and 800°C.

[0055] In particular, the heating element is a resistance heating element. In one embodiment, the heating element is shaped like a strand and is bent multiple times. Specifically, the heating element is a top heating element and / or grill heating element. It is therefore arranged in a space between a ceiling wall of the muffle and a ceiling wall of the housing.

[0056] Another aspect of the present disclosure relates to a cooking appliance. The cooking appliance has a housing. This housing can also be referred to as the outer housing. Furthermore, the cooking appliance also has a muffle. This muffle is a component of the cooking appliance separate from the housing. The muffle is arranged within the housing. The muffle has walls with which it defines a cooking chamber of the cooking appliance. In particular, the cooking chamber is directly defined by the walls of the muffle. Furthermore, the cooking appliance has at least one heating element, in particular a strand-like or rod-like element, which is bent multiple times in a single plane. This heating element is arranged outside the muffle in a space between the housing and the muffle.The heating element is arranged only in a portion of the space formed between only one wall of the muffle and only one outer wall of the housing, spaced apart from it and arranged at least substantially parallel to it. In one embodiment, the heating element is formed or extends substantially only in a surface located between only one wall of the muffle and only one outer wall of the housing. In one embodiment, the heating element comprises a first strand-like heating element that is bent multiple times in a single plane. In another embodiment, the heating element comprises a second strand-like heating element, which is also bent multiple times in a single plane. The two heating elements are separate parts of the heating element. Viewed in a projection plane, one heating element is surrounded by the other.The coils of one heating element are spaced apart around the other heating element. The heating elements can be operated independently in various modes and together in a third mode. This means the cooking appliance has at least three different operating modes for the heating elements. In one mode, for example, the first heating element can be activated, while the second is deactivated. In a second mode, the first heating element can be deactivated, and the second heating element can be activated. In a third mode, both the first and second heating elements can be activated simultaneously.

[0057] In one embodiment, at least one of the heating elements has a maximum possible heating power of 2 kW or greater. Additionally, or alternatively, in another embodiment, the two heating elements, when operated simultaneously, can have a combined maximum heating power of 3 kW or greater. This embodiment of the cooking appliance thus allows for a heating element located outside the cooking chamber that is compact and locally positioned, while also having at least two separate heating elements that are specifically arranged relative to each other. These at least two heating elements within a single heating element are precisely what is provided. This fundamentally enables a more flexible and variable operating mode for the heating element.Furthermore, the specific arrangement of the heating elements relative to each other and the precise heating power values—especially the inclusion of at least one heating element with a relatively high maximum heating power and a relatively high overall heating power—make such a heating element particularly advantageous as a grill heating element for a cooking appliance. This high heating power significantly expands the potential applications of the heating element. Although such a heating element is then stationary in a specific location, the number of components, their arrangement relative to each other, and the specific heating power values ​​allow for a wide variety of uses within the cooking appliance. This also enables a compact design with a reduced number of components.

[0058] In one embodiment, the maximum heating power of one heating element is lower than the maximum heating power of the other. This means that two identical heating elements are not used. This is advantageous because, on the one hand, the overall heating element system is not oversized, while on the other hand, one of the two heating elements has a relatively high maximum heating power. This applies both generally and in comparison to the other heating element. This allows for a wide range of applications for such a heating element and enables a variety of operating modes. It also means that a relatively high maximum heating power can be provided with just one of the two heating elements.If a higher maximum heating power is required for a particular cooking process, the heating element can be operated in a different mode by simultaneously running at least two of its heating elements. Conversely, if only a lower heating power is needed, only the heating element with the lower maximum power can be used. This ensures highly energy-efficient operation in all modes of the heating element. The heating element configuration can always be selected to provide the required heating power in a demand-oriented and energy-saving manner.

[0059] In one embodiment, the maximum heating power of the heating element with the higher maximum heating power is at least 50%, in particular at least 60%, and in particular at most 90%, greater than the maximum heating power of the heating element with the lower heating power. This is also a very advantageous embodiment, since the maximum heating powers do not merely differ minimally, but differ by at least half a percentage. Thus, the aforementioned advantages are fulfilled to a particularly high degree.

[0060] In one embodiment, the maximum heating power of the heating element with the lower maximum heating power is between 1.0 kW and 1.5 kW. In particular, this maximum heating power is between 1.1 kW and 1.3 kW, and especially 1.2 kW. This range of values ​​makes it possible to use the heating element alone for a very specific and relatively large number of cooking processes. This maximum heating power is therefore not so low that this single heating element would only suffice in exceptional cases.

[0061] In one embodiment, the maximum heating power of the heating element with the higher maximum heating power is between 2.0 kW and 2.5 kW. Specifically, this maximum heating power is between 2.1 kW and 2.3 kW. This provides a heating element which, considered on its own, has a relatively high maximum heating power. This also makes it possible to perform a variety of preparation processes requiring higher heating power with this single heating element.

[0062] As mentioned above, if the heating power of a single heating element is no longer sufficient to complete a cooking process, further operation is possible. In this case, it is advantageous for the maximum total heating power of the heating element to be between 3.0 kW and 4.0 kW, particularly between 3.2 kW and 3.5 kW, and especially 3.4 kW. This allows the heating element to also be used as a grill element in the cooking appliance.

[0063] In one embodiment, viewed in a projection plane, the first heating element surrounds the second heating element, with the first heating element having a higher maximum heating power than the second. Therefore, in this configuration, the first heating element with the higher maximum heating power is the outer heating element in the projection plane. This allows the higher heating power to be distributed more evenly over a larger volume. The heat source is then not as locally concentrated as it is with the second, inner heating element in this projection plane. Therefore, such an arrangement is particularly advantageous for higher heating powers, resulting in a more demand-oriented and even, or homogeneous, heat output.

[0064] In this context, the specific geometry and the arrangement of the individual heating elements are particularly advantageous. This allows for a highly demand-oriented and uniform distribution of heating power, while simultaneously enabling a highly advantageous and, where possible, locally targeted distribution of heating power.

[0065] In one embodiment, the strand shape of the entire strand of a heating element, in particular the heating element inner in the projection plane, has an asymmetrical H-shape. This shape, both on its own and in combination with the other heating element, yields the advantages already mentioned above.

[0066] In one embodiment, the strand shape of the entire strand of a heating element, particularly the outer heating element in the projection plane, is formed with two L-shaped strand sections, which are formed as hollow L-shapes by the strand's path. Specifically, these two L-shaped, and especially hollow, L-shapes are arranged symmetrically to each other about a central axis of symmetry of the heating element. This axis of symmetry is particularly parallel to the electrical connection ends of the two heating elements. This specific shape of one of the heating elements further supports the advantages mentioned above.

[0067] In one embodiment, the heating element, when viewed across its entire surface, has a higher area density at the edges than in the center. The heating elements are arranged accordingly, particularly through their specific strand configurations.

[0068] This configuration, with its higher surface density at the edges, allows for improved distribution and delivery of heating power, especially at very high heating levels. This results in improved cooking results.

[0069] In one embodiment, a heating element of this cooking appliance, as described above and as it may optionally be further developed by an advantageous embodiment, is a top heating element and / or grill element of the cooking appliance. Additionally or instead, in another embodiment, a heating element of the cooking appliance, as designed according to the above-mentioned aspect or as further developed by an advantageous embodiment, may also be a bottom heating element. Therefore, in one embodiment, it is possible that only a top heating element and / or grill element is designed accordingly. In another embodiment, only a bottom heating element of the cooking appliance may have a corresponding design. However, in a further embodiment, it is also possible that both a top heating element and / or grill element and a bottom heating element of the cooking appliance are designed accordingly.In such an embodiment, it is also possible that the upper heating element and / or grill element and the lower heating element are identical. This can relate to geometric aspects and / or operating parameters or physical parameters of these heating elements.

[0070] According to the present disclosure, at least one temperature sensor of the cooking appliance is arranged adjacent to both heating elements. In one embodiment, this sensor can be used to measure the temperature of the entire heating element in a standard operating mode. In another operating mode, where only one of the two heating elements is activated, the temperature of that activated element can be measured. Specifically, the temperature sensor measures the temperature of the adjacent wall of the muffle. Because the temperature sensor is positioned at the same or substantially the same distance from two sections of the heating elements, the wall temperature can be measured locally at the same location in all operating modes of the heating element. This position of the temperature sensor, being closest to both heating elements, ensures particularly accurate temperature measurement in all operating modes of the heating element.This specific, exposed position of a temperature sensor allows the temperature of one or more heating elements to be measured, depending on the operating mode. This makes it possible to accurately measure the temperature of the currently active heating element with a single temperature sensor in various operating modes. Consequently, a simplified arrangement of temperature sensors can be implemented. For example, only one temperature sensor is used to measure the temperature of the active heating element in its different operating modes.

[0071] In this context, it is also possible that several temperature sensors are provided and positioned accordingly. Depending on the intended operating mode, these can then each measure the temperature of at least one activated heating element.

[0072] Another aspect of the present disclosure relates to a cooking appliance. This cooking appliance has a housing. The housing can also be referred to as an outer housing. The cooking appliance also has a muffle. This muffle is a component of the cooking appliance separate from the housing. The muffle is arranged within the housing. The muffle, with its walls, defines a cooking chamber of the cooking appliance. In particular, the muffle, with its walls, directly defines the cooking chamber. The cooking appliance also has at least one heating element, which is in particular a strand-like or rod-like form and is bent multiple times in a single main extensional surface.

[0073] In this main extension area, and this applies to all aspects and embodiments of the invention, the heating element extends with its dimensions mainly.

[0074] This heating element is arranged outside the muffle in a space between the housing and the muffle. This heating element is located only in a portion of the space formed between only one wall of the muffle and only one outer wall of the housing, spaced apart from it and arranged at least substantially parallel to it. The heating element comprises a first heating element, in particular a strand-like or rod-like element, which is bent multiple times in a single principal extension plane. The heating element also comprises a separate and distinct second heating element, in particular a strand-like or rod-like element, which is bent multiple times in a single principal extension plane. Viewed in a projection plane parallel to the principal extension plane in which the heating element extends, one heating element is surrounded by the other heating element.In some operating modes of the heating element, one heating element can be operated independently of the other. In another operating mode, at least two of these heating elements are operated together and thus simultaneously. Here, too, at least three different operating modes can be present, as already explained above.

[0075] The cooking appliance has at least one temperature sensor for detecting the temperature of the heating element. The temperature sensor is located in the space between the heating elements and is adjacent to and between them. This is particularly true when viewed in the projection plane. The cooking appliance also has at least one temperature sensor for detecting the temperature of the muffle wall. This temperature sensor is located in the space between the heating elements and is adjacent to and between them. With this single temperature sensor, the temperature of the muffle wall can be detected in all operating modes of the heating element, specifically at the same location.

[0076] According to the invention, the temperature sensor has a distance to the first heating element that is equal to or substantially equal to the distance of the temperature sensor to the second heating element. This applies particularly in the projection plane. Preferably, any difference in this distance is less than 10% of either distance. In particular, a deviation of less than or equal to 10% of the smaller of the two distances is possible. This is measured at the point on the temperature sensor that, viewed along a straight line, has the shortest distance to the adjacent heating element. Such positioning of a temperature sensor makes it particularly possible to accurately determine the current temperature of the wall. In particular, this information can then be transmitted to a control unit of the cooking appliance. This unit can then perform a corresponding evaluation of the information received from the sensor.In particular, an adapted operating mode of at least one heating element can then be implemented. Specifically, control and / or regulation can then be carried out.

[0077] In one embodiment, this temperature sensor is arranged directly against an outer surface of the muffle. The temperature sensor can be tubular, at least in part.

[0078] The temperature sensor may be a PT sensor. In particular, it may be a PT500 or a PT1000.

[0079] In one embodiment, an electrical supply line to the sensor is protected from the heating element. This can be achieved through positioning and / or by a suitable heat-resistant sheathing of the cable or electrical conductor. For example, it can also be provided that this electrical conductor is completely routed through a thermal insulation unit and / or a thermal shielding unit located in the space between the components. This also provides advantageous thermal insulation for this sensor cable.

[0080] Another aspect of the present disclosure relates to a cooking appliance. The cooking appliance has a housing. This housing can also be referred to as the outer housing. Furthermore, the cooking appliance also has a muffle. This is a component of the cooking appliance separate from the housing. The muffle is arranged within the housing. The muffle, with its walls, defines a cooking chamber of the cooking appliance. In particular, it directly defines the cooking chamber with its walls. The muffle has a top wall, a bottom wall, a back wall, and side walls. In one embodiment, the thickness of the side walls is different from the thickness of the bottom wall and / or from the thickness of the back wall and / or from the thickness of the top wall. Such an embodiment of a muffle is particularly advantageous in order to exhibit minimal deformation under the corresponding heat exposure of an external heating element.Especially when a heating element in an oven is located outside the cooking chamber, in a space between the oven cavity and the housing, it may be necessary, at least in some operating modes, for the heating element to operate at a particularly high power. This causes such a heating element, which is typically a resistance heating element, to become extremely hot. Temperatures exceeding 700°C can occur. These temperatures then also affect, at least partially, the adjacent walls of the oven cavity. For example, if such a heating element is a top heating element and / or grill element, the adjacent top wall is also subjected to heat. This can also be the case for a bottom heating element of the oven, either additionally or instead. As a result, heat is also exerted on the bottom wall of the oven cavity.To maintain high dimensional stability of the muffle, particularly in such specific configurations, the aforementioned aspect of the invention is advantageous. In this context, the walls are therefore designed to be thicker or thinner as required, in order to achieve particularly high dimensional rigidity even under very high heat exposure from outside the muffle, depending on the respective configuration.

[0081] In one embodiment, the thickness of the side walls is less than the thickness of the bottom wall. Additionally or instead, the thickness of the side walls can be less than the thickness of the back wall. In particular, in another embodiment, the thickness of the side walls can also be less than the thickness of the top wall. Since, according to the aforementioned possible embodiment, heating elements are arranged adjacent to and above the top wall and / or adjacent to and below the bottom wall of the muffle, these walls of the muffle are exposed to particularly intense heat. Therefore, it is especially advantageous in this context if these walls are thicker than the side walls located further away from the heating elements. Due to the container-like shape of a muffle and the direct proximity of the aforementioned walls, corresponding mechanical stresses and deformation tendencies can occur or be transmitted here.In order to exhibit the necessary deformation stability, it is particularly advantageous if the bottom wall and / or the ceiling wall are thicker than the other walls of the muffle.

[0082] In one embodiment, the thickness of the side walls is reduced by a value between 0.2 mm and 0.5 mm, particularly between 0.25 mm and 0.35 mm, compared to the thickness of the bottom wall, the back wall, and / or the top wall. This difference in thickness between thinner and thicker walls is precisely what enables the aforementioned advantages. On the one hand, the thinner walls can be designed according to requirements and do not need to be excessively thick. On the other hand, the thicker walls can be better adapted to potentially greater heat exposure. Furthermore, this difference also prevents undesirable weight asymmetry in the muffle's design. Therefore, this variation in thickness is particularly suitable for the aforementioned functionalities and advantages.

[0083] In one embodiment, the thickness of the side walls is between 0.4 mm and 0.8 mm, in particular between 0.4 mm and 0.6 mm.

[0084] In one embodiment, the thickness of the bottom wall is between 0.6 mm and 1.0 mm, particularly between 0.7 mm and 0.9 mm. In another embodiment, the thickness of the top wall may be between 0.6 mm and 1.0 mm, particularly between 0.7 mm and 0.9 mm. These individually possible thickness values ​​of the aforementioned walls also enable a particularly high rigidity of the muffle, especially when high heat from heating elements of the cooking appliance located outside the muffle acts on these walls located adjacent to the heating element.

[0085] In one embodiment, the muffle is made of metal.

[0086] In one embodiment, the muffle can be provided, at least on its outer surface, at least in certain areas, with an additional material to a base material such as steel, which has a heat resistance of up to 550°C, and in particular up to 530°C. This provides further protection for the walls of the muffle and further increases its deformation stability. In one embodiment, this applied material is a coating on the outer surface of the wall of the muffle, specifically enamel with a heat resistance of up to 550°C, and in particular up to 530°C.

[0087] Another aspect of the present disclosure relates to a cooking appliance. The cooking appliance has a housing. The housing can be referred to as the outer housing. The cooking appliance also has a muffle. The muffle is a component separate from the housing. The muffle is arranged within the housing. The muffle, with its walls, defines a cooking chamber of the cooking appliance. In particular, it directly defines this cooking chamber with its walls. Furthermore, the cooking appliance has at least one first heating element, in particular a strand-like or rod-like element, and in particular extending in a single main extensional plane in a planar and multiply curved manner. The heating element is arranged outside the muffle in a space between the housing and the muffle. The first heating element is arranged as a top heat and / or grill heating element in an upper region of the space.This space is formed between an upper wall of the muffle (viewed in the vertical direction of the cooking appliance) and an upper outer wall of the housing that is spaced apart from it and arranged at least substantially parallel to it. Furthermore, the cooking appliance has at least one second heating element, which is in particular a strand-like or rod-like element and extends in a single main plane and is bent in multiple directions. The second heating element is arranged outside the muffle in a space between the housing and the muffle. The second heating element is arranged as a bottom heating and / or grilling element in a lower section of the space (viewed in the vertical direction), wherein the space is located between a lower wall of the muffle and a lower outer wall of the housing that is spaced apart from it and arranged at least substantially parallel to it.

[0088] In one embodiment, the first heating element, i.e., the top heating and / or grill element, and the second heating element, i.e., the bottom heating and / or grill element, are identical in at least one electrical heating element parameter and / or in at least one geometric heating element parameter. This provides a cooking appliance that is adapted to the specific location and function of the bottom heating and / or grill element and the top heating and / or grill element, or rather, that these heating elements are adapted to each other. This allows for improved heating performance. In particular, it enables more demand-oriented operation of the heating elements. Finally, it also allows the bottom heating and / or grill element to be used for functions for which it is not suitable in conventional appliances.This is especially true when operating modes, particularly those with specific heating outputs, are enabled using the bottom heating and / or grill heating element, which were not previously possible.

[0089] This means, for example, that a bottom heating element can be operated in such a way that it's possible to prepare a pizza directly on the bottom wall of the oven. This allows for a bottom heating element that essentially functions as a pizza-preparation element. A grilling function can also be provided by the bottom heating element, enabling grilling from below.

[0090] In one embodiment, an electrical heating element parameter is a maximum heating power of the entire heating element and / or a maximum heating power of at least one of several heating elements of the heating element, if a heating element comprises several separate heating elements. In particular, in such an embodiment, these multiple, and especially at least two, separate heating elements are arranged in a common main extent area or extend with their main extent dimensions planarly within this main extent area. These heating elements can then be arranged one inside the other within this main extent area, or one heating element can at least partially surround the other heating element within this main extent area. The outer heating element surrounds the other, inner heating element with its windings spaced apart.

[0091] In one embodiment, a geometric heating element parameter is, for example, the strand length of a heating element and / or the strand length of at least one of several heating sub-elements of the heating element. In another embodiment, a geometric heating element parameter can also be the shape of a strand of the heating element and / or the size of the heating element in a plane.

[0092] In one embodiment, the maximum heating power of the first heating element and the second heating element can be the same.

[0093] In principle, in one embodiment, it is also possible that all electrical heating element parameters and / or all geometric heating element parameters of these two heating elements are the same. Therefore, in this embodiment, they can also be completely identical heating elements.

[0094] In one embodiment, the maximum heating power of the first heating element is between 3.0 kW and 4.0 kW, in particular between 3.2 kW and 3.6 kW. Additionally or instead, in another embodiment, the maximum heating power of the second heating element can be between 3.0 kW and 4.0 kW, in particular between 3.2 kW and 3.6 kW.

[0095] Especially when the bottom heating element is similar to or the same as the top heating element, and particularly when it offers a comparable maximum heating output, the oven can also be configured with a pizza-making mode. Furthermore, this increased heating output of the bottom heating element also enables grilling within the cooking chamber, where the grill element is located beneath the bottom wall of the oven, formed by the bottom heating element. This allows for a grilling function with a heating element that provides heat from below. Additionally, this enables pyrolytic cleaning, which also provides sufficient heat from below via the bottom heating element. Finally, high-performance cooking with sufficient heat from below is also possible.For example, this can be advantageous for preparing fruit. In particular, drying fruit, such as prunes or similar items, can then be carried out in the cooking chamber.

[0096] It is generally advantageous to position the heating elements outside the cooking chamber, as this protects them from steam and moisture that can occur inside. This prevents corrosion of the heating elements. Consequently, a material that does not necessarily need to be corrosion-resistant can be used for the heating elements.

[0097] Another aspect of the present disclosure relates to a cooking appliance. The cooking appliance has a housing, which can also be referred to as an outer housing. Furthermore, the cooking appliance has a muffle. The muffle is a component separate from the housing. The muffle is located within the housing. The muffle, with its walls, defines a cooking chamber of the cooking appliance. It directly defines this cooking chamber with walls. The muffle has a ceiling wall, a bottom wall, a back wall, and side walls. The ceiling wall and the side walls are provided as separate components connected by a permanent joint. Additionally or instead, it may be provided that, for example, the ceiling wall and / or the bottom wall are provided as separate components connected to the side walls by a permanent joint. The ceiling wall and / or the bottom wall have a trough shape.Such a modular design allows for a more rigid muffle. The modular components, initially manufactured separately and delivered in their final form—namely the top wall and / or bottom wall, along with their separate side walls—allow for individual customization. This enables these components to be tailored more precisely to the overall rigidity requirements of the muffle. This is particularly beneficial when rigidity and deformation resistance are essential during the operation of at least one heating element of the cooking appliance. The trough shape of two highly exposed modular components—the top wall and the bottom wall—also contributes to their increased rigidity when considered individually.Therefore, in this context, the upper and lower ends of this muffle can be constructed more robustly when considered independently. A trough shape, in particular, allows for greater torsional rigidity. This also enables the mechanical coupling, especially through the resulting permanent connections with the side walls, to further improve the overall rigidity of the muffle. These permanent connections represent interfaces between the individual components of the modularly constructed muffle when they are connected. Permanent connections are those that cannot be formed and broken reversibly without damaging or destroying at least one of the components. A welded joint is one example of a permanent connection.Furthermore, this is recognizable and identifiable as such on the finished muffle, so that it is also recognized in this context that the individual components of the muffle are already manufactured in the form separately before being permanently joined and are then subsequently assembled.

[0098] In one embodiment, both the top and bottom walls have a trough shape. This further enhances the advantages mentioned above. Particularly high rigidity and high deformation stability are achieved, especially under the influence of heat from a resistance heating element of the cooking appliance. Especially when a top heating element is positioned directly adjacent to the top wall, deformation of this wall is significantly reduced compared to conventional muffles. The same applies, additionally or instead, to a bottom wall if, for example, a bottom heating element of the cooking appliance is positioned directly adjacent to it, particularly if it is a resistance heating element. This is because, with resistance heating elements, correspondingly high heat is also transferred directly to these adjacent walls, causing them to heat up considerably.

[0099] In one embodiment, the ceiling wall has a trough-shaped ceiling and a trough collar. The trough collar is arranged at the edge of the trough-shaped ceiling, at least partially surrounding it. In another embodiment, the trough-shaped ceiling is curved, at least partially, in a dome-like manner. This curvature of a specific sub-element of the ceiling wall also contributes to improved stiffness and greater resistance to deformation.

[0100] In one embodiment, the floor wall has a basin bottom and a basin collar, which is arranged at least partially around the edge of the basin bottom, wherein the basin bottom is at least partially, and in particular domed, in this respect. The corresponding advantages then apply to the floor wall as those mentioned for the ceiling wall in the aforementioned advantageous embodiment.

[0101] In one embodiment, the tub ceiling has a curvature such that the vertical distance between the highest point of the curvature and the lowest point of the tub ceiling is between 10 mm and 15 mm, particularly between 11 mm and 13 mm. This results in a curvature that is relatively shallow, so that the installation space is not undesirably increased in height. At the same time, this curvature provides a corresponding stiffening compared to a completely flat tub ceiling.

[0102] In one embodiment, the bottom of the tub can be curved to match the shape of the base wall. In this case, the corresponding advantages are also achieved.

[0103] In one embodiment, the ceiling wall has a trough-shaped ceiling and a trough collar. The trough collar is arranged around at least part of the perimeter of the trough-shaped ceiling. The trough collar forms the side wall of the trough shape. A flange is arranged on the trough collar, projecting laterally from it. The flange is formed integrally with the trough collar. In particular, the entire ceiling wall, including the trough-shaped ceiling and the trough collar, and especially any additional flange, is formed integrally. For example, such a shape for the ceiling wall can be produced from a provided blank, especially a metal plate, by a corresponding forming process. The same process can be used for the floor wall in one embodiment.

[0104] This protruding flange provides further stiffening of the ceiling wall, especially the tub collar.

[0105] In one embodiment, such a laterally projecting flange can also be formed on a trough collar of the bottom wall. Here, too, the corresponding advantages apply as those mentioned for the ceiling wall.

[0106] In one embodiment, such a flange is a feedback element designed for coupling with a spacer unit of the cooking appliance. In particular, such a spacer unit can then be directly mechanically coupled to this feedback element. The spacer unit is specifically designed to position the heating element at a distance from the adjacent ceiling wall or adjacent to the floor wall. This flange is thus multifunctional: it serves both to stiffen the ceiling or floor wall and to directly mechanically couple with such a separate spacer unit.

[0107] In one embodiment, the flange is integrally formed on a free edge of the tub collar facing away from the tub ceiling. In particular, this flange is arranged to project freely outwards from the tub collar. This flange is thus a flat web or a strip-shaped web.

[0108] It can extend at least 50%, in particular at least 60%, in particular at least 70%, in particular at least 80%, in particular at least 90% over the entire length of a side wall of the hull collar. Additionally or instead, such a flange can also extend at least 50%, in particular at least 60%, in particular at least 70% over the length of a rear section of the hull collar.

[0109] In one embodiment, the side walls of the muffle are permanently connected directly to the trough collar. This permanent connection, for example, a weld, is then made directly between an edge of the side wall and the trough collar, such as the top wall and / or the bottom wall. It can also be provided that, viewed vertically, a side wall overlaps the top wall, in particular the top wall's trough collar. In another embodiment, the same can be provided with the bottom wall, either additionally or instead. This partial vertical insertion of the side walls into the trough shape of the top wall and / or the bottom wall further improves stability. In particular, the detachable connection can be more extensive and / or cover a larger area in this way.This also allows the corresponding interfaces between the individual module parts of the muffle to be designed to be more stable and resilient.

[0110] In one embodiment, the thickness of the side walls differs from the thickness of the bottom wall. Additionally or instead, the thickness of the side walls can differ from the thickness of the back wall and / or from the thickness of the ceiling wall. In particular, the thickness of the side walls is less than the thickness of the ceiling wall and / or less than the thickness of the bottom wall.

[0111] In one embodiment, the muffle has a front flange as a further separate module component. This flange is preferably formed as a continuous frame that, in the assembled state of the muffle, rests against the top wall and / or the bottom wall and / or the side walls. Here, too, this front flange can initially be prefabricated and then subsequently connected to other walls of the muffle by a mechanical connection, in particular a permanent connection such as a weld. Preferably, this front flange has a thickness between 1.1 mm and 1.4 mm, particularly between 1.2 mm and 1.3 mm. In one embodiment, the front flange is designed with a greater thickness than the thickness of the top wall and / or the bottom wall.

[0112] In one embodiment, an additional material is applied to the outer surface of the base material, particularly metal, for example steel, of the muffle and / or to the inner surface of the base material of the muffle. This material can, for example, be enamel. This enamel can be applied as a coating. In one embodiment, the thickness of the enamel material on the inner surface is between 0.10 mm and 0.20 mm, particularly between 0.13 mm and 0.17 mm. In another embodiment, the thickness of the enamel material on the outer surface of the muffle is between 0.050 mm and 0.100 mm, particularly between 0.060 mm and 0.080 mm. These specific values ​​of the enamel coating improve the heat resistance of the muffle, particularly of the base material, which is preferably steel. These layer thicknesses also make it possible to further improve the rigidity of the muffle and thus also increase its deformation resistance.Especially when the muffler is exposed to heat.

[0113] In one embodiment, the floor wall is identical in shape, size, and / or material to the ceiling wall. In another embodiment, these side walls and the rear wall can be formed as a single-piece U-module, with this U-module then being directly connected to the separate ceiling wall and floor wall by permanent connections.

[0114] In one embodiment, the side walls may have additional embossing. This increases the inherent stiffness of these side walls. The same can be provided for the rear wall, either additionally or instead.

[0115] Preferably, the permanent connections are formed as welded joints, in particular crimp welds. These are particularly stable and durable, especially under intense heat and high mechanical stress.

[0116] Another aspect of the present disclosure relates to a cooking appliance. The cooking appliance has a housing. The housing can be referred to as the outer housing. The cooking appliance also has a muffle. The muffle is a component separate from the housing. The muffle is arranged within the housing. The muffle, with its walls, defines a cooking chamber of the cooking appliance. In particular, it directly defines this cooking chamber with its walls. Furthermore, the cooking appliance has at least one first heating element, in particular a strand-like or rod-like element, and in particular extending in a single main extensional plane in a planar and multiple curved sections. The heating element is arranged outside the muffle in a space between the housing and the muffle. The first heating element is arranged as a top-heat heating element, in particular as a top-heat and / or grill heating element, in an upper region of the space.This space is formed between an upper wall of the muffle (viewed in the vertical direction of the cooking appliance) and an upper outer wall of the housing that is spaced apart from it and arranged at least substantially parallel to it. Furthermore, the cooking appliance has at least one second heating element, which is in particular a strand-like or rod-like element and extends in a single main plane and is bent in multiple directions. The second heating element is arranged outside the muffle in a space between the housing and the muffle. The second heating element is a bottom heating element, in particular a bottom heating and / or grill heating element, and is arranged in a lower space (viewed in the vertical direction) of the space, wherein the space is located between a lower wall of the muffle and a lower outer wall of the housing that is spaced apart from it and arranged at least substantially parallel to it.

[0117] In one embodiment, the first heating element, i.e., the top heating and / or grill element, and the second heating element, i.e., the bottom heating and / or grill element, are identical in at least one electrical heating element parameter and / or in at least one geometric heating element parameter. This provides a cooking appliance that is adapted to the specific location and function of the bottom heating and / or grill element and the top heating and / or grill element, or rather, that these heating elements are adapted to each other. This allows for improved heating performance. In particular, it enables more demand-oriented operation of the heating elements. Finally, it also allows the bottom heating and / or grill element to be used for functions for which it is not suitable in conventional appliances.This is especially true when operating modes, particularly those with specific heating outputs, are enabled using the bottom heating and / or grill heating element, which were not previously possible.

[0118] In one embodiment, the cooking appliance has a control device. This device is designed such that, at least in one operating mode of the cooking appliance in which the top heating element (preferably the top heating and / or grill element) and the bottom heating element (preferably the bottom heating and / or grill element) are activated simultaneously, the actual heating power of one of the two heating elements can be set differently from the actual heating power of the other heating element. This allows the user to set different heating powers for the individual activated heating elements via the control device. This enables more customized cooking processes. For example, if less actual heating power is required from the bottom heating element than from the top heating element, this can be adjusted using the control device.The same can also be true, for example, if the preparation process requires a higher actual heating power from the bottom heating element compared to the top heating element.

[0119] In general, it is therefore possible to set the actual heating output differently from the maximum heating output of one of the heating elements. This allows for a very individual and versatile configuration of the total heating output of both heating elements when they are both activated.

[0120] It is generally possible, and also relevant in this context, for the selected or set heating power levels to be evaluated by a control unit of the cooking appliance, and for this control unit to then control the heating elements accordingly. It is also possible, in this context, to monitor the activated heating elements using a control algorithm and regulate the desired heating power levels accordingly.

[0121] It may be provided that both heating elements have the same maximum heating power. However, this aspect of the invention makes it possible, in addition to only being able to set the maximum heating power, to also set a different actual heating power for at least one heating element.

[0122] In one embodiment, at least one of the actual heating powers of these at least two heating elements of the cooking appliance can be set as a percentage of that element's maximum heating power. This can also be done via the control device. It is also possible that the actual heating powers of these at least two heating elements can be adjusted relative to each other via the control device as a percentage. This adjustment can be either continuous or in discrete steps. It is also possible that discrete steps are predefined and can then be selected. These specific steps can each be percentages of a maximum heating power. In another embodiment, at least one of the two heating elements can have two separate heating sub-elements.These can be operated independently. In one embodiment, an individual actual heating power of the respective heating element can be selected and set by choosing one of these heating elements. Thus, in one embodiment, at least three different actual heating powers of the heating element can be set. This can be achieved, on the one hand, by the heating power of a first heating element, and on the other hand, by the heating power of at least a second heating element of this heating element, when only one of the two heating elements is activated. In a further selection process, however, both heating elements of this heating element, which has at least these two heating elements, can also be operated together. Then a third heating power of the heating element is available. This is then, in particular, the maximum heating power of the heating element.

[0123] The terms "top", "bottom", "front", "back", "horizontal", "vertical", "depth", "latitude", "height", etc. indicate the positions and orientations given when the device is used and arranged as intended.

[0124] Exemplary embodiments of the invention are explained in more detail below with reference to schematic drawings. These show: Fig. 1 a perspective view of an embodiment of a cooking appliance; Fig. 2 a perspective view of an embodiment of a heating element with an embodiment of a spacer unit; Fig. 3 a perspective view of another embodiment of a heating element with an embodiment of a spacer unit; Fig. 4 a side view of the arrangement according to Fig. 3 ; Fig. 5 a top view of the arrangement according to Fig. 3 Fig. 6 is a perspective view of a section of an embodiment of a cooking appliance with specific components; Fig. 7 is a top view of the arrangement according to Fig. 6 Fig. 8 a perspective view of another embodiment of a heating element with an embodiment of a spacer unit; Fig. 9 a schematic view of an embodiment of a muffle of a cooking appliance; Fig. 10 a schematic sectional view of partial components of an embodiment of a cooking appliance; Fig. 11 a side view of a partial area of ​​an embodiment of a cooking appliance; Fig. 12 a partial view of heating elements of a heating element with a temperature sensor of an embodiment of a cooking appliance; Fig. 13 an exploded view of an embodiment of a muffle of an embodiment of a cooking appliance; and Fig. 14 the muffle according to Fig. 13 in the compound state.

[0125] In the figures, identical or functionally equivalent elements are given the same reference symbols.

[0126] In Fig. 1 An exemplary embodiment of a cooking appliance 1 is shown in a perspective view. The cooking appliance 1 can be an oven. The cooking appliance 1 can be a microwave oven or a steam oven. It is also possible that the cooking appliance is an oven with a microwave function and / or a steam cooking function.

[0127] The cooking appliance 1 has a first housing 2. This can also be referred to as the outer housing. The housing 2 has a top wall 3, a bottom wall 4, a back wall 5, and side walls 6 and 7. Furthermore, the cooking appliance 1 has a muffle 8. The muffle 8 is a separate component of the cooking appliance 1 from the housing 2. The muffle 8 is enclosed within the housing 2. The muffle 8 is made of metal. It can be made of steel. The muffle 8 has a top wall 9, a bottom wall 10, a back wall 11, and opposing side walls 12 and 13. The cooking chamber 14 of the cooking appliance 1 is defined by the muffle 8. In particular, the cooking chamber 14 is directly defined, at least in part, by the walls of the muffle 8. The cooking appliance 1 also has a door 15. This door is movably attached to the housing 2 and / or the muffle 8. It can be pivoted here about a vertical axis A. The door 15 is arranged for closing the cooking chamber 14 from the front.

[0128] A gap 16 is formed between the muffle 8 and the housing 2. This gap 16 has an upper gap region 17 in the vertical direction (y-direction) of the cooking appliance 1. Furthermore, the gap 16 has a lower gap region 18 in this vertical direction. The upper gap region 17 extends vertically between the top wall 9 of the muffle 8 and the top wall 3 of the housing 2. The lower gap region 18 extends between the bottom wall 10 of the muffle 8 and the bottom wall 4 of the housing 2. In one embodiment, the cooking appliance 1 has a heating element 19. In the illustrated embodiment, the heating element 19 is arranged outside the cooking chamber 14. Here, it is located in the gap 16, specifically in the upper gap region 17. The heating element 19 is a resistance heating element. As shown in Fig. 1 The heating element 19 is formed in a strand-like or rod-like shape. This strand or rod is bent or wound multiple times. The heating element 19 is a top-heat element or a grill heating element. In particular, it is a top-heat and / or grill heating element. In one embodiment, the cooking appliance 1 has a further heating element 20. This heating element 20 is arranged outside the cooking chamber 14. It is arranged in particular in the space, preferably in the lower space 18. This heating element 20 is in particular a bottom-heat element. It can also be a bottom-heat and / or grill heating element of the cooking appliance 1.

[0129] In one embodiment, the heating element 19 is arranged at a distance from the ceiling wall 9 in the space 17. It is also arranged at a distance from the ceiling wall 3 of the housing 2. The heating element 19 is formed with its main extent in a main extent plane. This plane is defined, in particular, by the width direction (x-direction) and the depth direction (z-direction) of the cooking appliance 1. The main extent plane can be flat or curved. The extruded shape with the curved form of the heating element 19 is thus essentially laid within this horizontal main extent plane. In one embodiment, the heating element 19 is separated by a spacer unit 21 (as shown in Fig. 2 (as shown) of the cooking appliance 1 is arranged at a distance from the wall 9, in particular from an outer surface 9a of the wall 9 facing away from the cooking chamber 14. In one embodiment, this spacer unit 21 has several spacer bars 22, 23, 24, 25, 26, 27, 28 and 29. The number and arrangement of these spacer bars 22 to 29 are merely exemplary. These spacer bars 22 to 29 are oriented at least partially outward from the main extensional surface that is defined by the main dimensions of the heating element 19.

[0130] In the illustrated embodiment, these spacer bars 22 to 29 thus extend downwards from this main extension surface, in which the main extension or the main size of the heating element 19 is formed.

[0131] With this spacer unit 21, the heating element 19 is arranged to sit on top of the muffle 8. This means that this spacer unit 21 sits directly on the muffle 8. In one embodiment, the spacer bars 22 to 29 can therefore sit directly on the muffle 8 with their cross-sectional areas.

[0132] In another embodiment, as described in Fig. 2 As shown, at least one spacer rod has a bend at one end facing away from the heating element 19. In the case of spacer rod 22, this bend is provided to have an end bend 22a. This bend connects to the side facing away from the heating element 19, or to the end facing away from, a further rod section 22b. This bend 22a of spacer rod 22 is a coupling element with which the spacer unit 21 sits on a side facing the heating element 19 of a counter-coupling element of the cooking appliance 1 for distance-adjusting coupling, in particular directly. As can be seen, in one embodiment, this bend 22a is arranged at an angle of 85° and 95°, in particular 90°, relative to the further rod section 22b that connects directly to it.In the exemplary embodiment, at least one further spacer bar on this side of the spacer unit 21, here spacer bar 25, is formed with a bend 25a and a bar section 25b corresponding to spacer bar 22. A similar arrangement is provided in an exemplary embodiment for spacer bar 26, which also has a bend 26a and a bar section 26b. Similarly, in an exemplary embodiment, spacer bar 29 has a bend 29a and a bar section 29b adjoining it. As can be seen here, the bends 22a, 25a, 26a, and 29a extend in the horizontal direction, in particular with their longitudinal axes in the width direction. In an exemplary embodiment, they are arranged at the essentially four corner regions of the heating element 19.

[0133] Furthermore, in one embodiment, differently shaped spacer bars are provided. For example, spacer bar 23 also has an end bend 23a. This bend connects to the side facing away from the heating element 19, or rather to the end facing away from another bar section 23b of spacer bar 23. As can be seen here, this bend 23a extends with its longitudinal axis in the depth direction (z-direction). In addition, it is provided that, viewed in the height direction (y-direction), bend 23a is lower and thus further away from the heating element 19 than bend 22a of spacer bar 22. Likewise, in one embodiment, this height offset of bend 23a is also formed in comparison to bends 25a, 26a, and 29a. In another embodiment, spacer bar 24 is designed in accordance with spacer bar 23.There, too, a bend 24a and a rod section 24b are provided. In a further embodiment, this is also provided for the spacer rod 28. In one embodiment, this rod is also formed by a bend 28a and a rod section 28b adjoining it. The same is also formed in a further embodiment by the bend 27a and the rod section 27b of the spacer rod 27. In particular, the bends 23a, 24a, 27a, and 28a are arranged at the same or substantially the same height. As can also be seen, these bends 23a and 24a extend along their longitudinal axes when viewed in the depth direction. In particular, they face each other. In one embodiment, this also applies to the bends 27a and 28a. In another embodiment, it is also possible that the bends 23a and 24a and / or the bends 27a and 28a are directly connected to each other.This effectively creates a continuous bending bar when viewed in the depth direction.

[0134] In one embodiment, these bends 23a, 24a, 27a and 28a each form a rear-engaging coupling part with which the spacer unit 21 rests behind a counter-coupling element of the cooking device 1 on a side facing away from the heating element 19 for distance-adjusting coupling, in particular directly, in a rear-engaging manner.

[0135] In one embodiment, the cooking appliance 1 has position locking elements. These position locking elements are formed by position locking rods 30, 31, 32, and 39. The number is given here only as an example. In one embodiment, such a position locking rod 39, in particular a straight one, is arranged directly on the underside of the heating element 19. A fixed connection is formed between a position locking rod 30 to 32, 39 and the heating element 19. A preferably permanent connection can be provided. For example, a welded connection can be implemented. As can be seen here, a position locking rod 30, 31, or 39 extends over the entire width of a heating element 19.In the exemplary embodiment, the further position securing element or the further position securing rod 32 is not formed over the entire width, but extends on opposite sides of a central axis M with corresponding position securing rod sections. In an exemplary embodiment, however, this position securing rod 32 can also be a single continuous rod, as shown in . Fig. 2 As shown, this position-locking rod 32 is not completely straight, but angled. This also secures the position of electrical, especially rod-shaped, connecting pieces 33, 34, 35 and 36. A section of the position-locking rod 32 is arranged directly on the underside of these connecting pieces 33 to 36.

[0136] In one embodiment, a spacer bar is arranged on at least one positioning bar 39, particularly at opposite ends. In particular, the spacer bars are formed integrally with the positioning bar. For example, the spacer bars 22 and 26 are directly integrally formed on opposite ends of the positioning bar 39. This results in a U-shaped support and positioning bar.

[0137] In one embodiment, this can also be provided for the additional, preferably present, position-locking bars 30, 31, and 32. Here, too, spacer bars 23, 24, 25, 27, 28, and 29 are integrally formed at opposite ends of the position-locking bars 30 to 32, arranged at an angle to them. This also forms a bar frame on which the heating element 19 rests.

[0138] In a preferred embodiment, the heating element 19 has at least two heating elements 37 and 38. The two heating elements 27 and 38 are separate and independent of each other. The first heating element 37, which is in a strand-like or rod-shaped form and has multiple bends, has two electrical connection pieces 33 and 36. The second heating element 38, which is also in a strand-like or rod-shaped form and has multiple bends, has its own electrical connection pieces 34 and 35. As in the embodiment in Fig. 2 As can be seen, both heating elements 37 and 38, with their curved shape, extend within a principal extent plane. This plane can be a horizontal plane. In one embodiment, they both extend within the same principal extent plane, which is defined by the width and depth of the cooking appliance 1. Furthermore, as can be seen when viewed as a projection onto this principal extent plane, one heating element is surrounded by the other. Here, it is provided that the first heating element 37, viewed in this projection plane, circumferentially surrounds the second heating element 38. The coils of one heating element 37 engage the coils of the other heating element 38 at a distance. The second heating element 38 is framed by the first heating element within this principal extent plane.

[0139] In one embodiment, the second heating element 38, viewed in this projection plane, has an asymmetrical H-shape. Thus, a smaller leg 38a, a larger leg 38b, and a connecting leg 38c are formed by strand sections of the entire strand shape of this second heating element 38. In this context, the first leg 38a is shorter but wider than the other leg 38b.

[0140] As can also be seen, the first heating element 37 has U-shaped strand sections 37a and 37b. These are arranged symmetrically to each other with respect to the central axis M. In the depth direction, these U-shaped strand sections 37a and 37b overlap the shorter H-leg 38a and the connecting leg 38c. An overlapping arrangement with the longer H-leg 38b in this depth direction is not provided. However, in the width direction (x-direction), an overlapping arrangement is formed between this H-leg 38b and these U-shaped strand sections 37a and 37b. In the width direction, these U-shaped strand sections 37a and 37b do not overlap the shorter H-leg 38a and the connecting leg 38c.Viewed in the width direction, these U-shaped strand sections 37a and 37b are in particular the components or strand sections of the first heating element 37 that are closest to the shorter H-leg 38a and the connecting leg 38c.

[0141] As in Fig. 2 As can be seen, in a further embodiment, it is provided that, viewed in the width direction (x-direction), further strand sections 37c and 37d, in particular running parallel to them, connect to these U-shaped strand sections 37a and 37b towards the outside. In one embodiment, this forms a double U-shape of these strand sections. On the facing sides of these U-shaped strand sections 37a and 37b, for example, a multiply bent connecting structure 37e of the first heating element can be formed in one embodiment. This, in turn, can be, as shown in Fig. 2 The structure is shown to be a multiple U-shape oriented in the depth direction, in particular having at least two, preferably three, directly adjoining U-shaped strand regions. In particular, these can be five U-shaped regions oriented alternately to one another, as shown in Fig. 2 has been realized.

[0142] In another embodiment of the heating element 19, as shown in Fig. 3 As shown in the perspective view, the first heating element 37 in the connection area of ​​the facing U-shaped strand sections 37a and 37b can be arranged differently, as in Fig. 2 , be educated. As this is in Fig. 3 As can be seen, a straight strand 37f of the first heating element 37 is formed at the front and limits the strand shape. This then transitions into curved U-shaped sections. As a result, instead of the U-shaped strand sections 37a and 37b, whose U-shape is open on the side facing away from the electrical connection pieces 33 to 36, an L-shape of strand sections is formed. Here, an L-shaped strand section 37g and 37h is formed in each case. In this respect, a hollow L is formed in each case. In an embodiment in Fig. 3 It can also be seen that the bends 23a and 24a are directly connected to each other, thus realizing a one-piece rod as a bend.

[0143] In Fig. 4 is a side view of the arrangement according to Fig. 3 to recognize.

[0144] As can also be seen here, in the vertical direction (y-direction) there is the previously explained vertical offset between bends 26a and 23a, as well as the one in Fig. 4 The recognizable bends 22a and 23a are evident. In particular, this height difference is such that a lower edge of the higher bends 26a is higher than an upper edge of bend 28a, especially by a certain distance. The same applies to bends 22a and 23a, as well as to the bends in Fig. 2 and Fig. 3 The further bends shown as examples. This creates a gap between the underside of the higher bend 26a and the top side of the lower bend 28a. This gap is dimensioned in such a way that a feedback element of the cooking appliance 1 can be positioned between them. A corresponding height offset is also implemented in the other pairs of bends shown here, as described in Fig. 4 and especially in Fig. 2 They are recognizable as formed.

[0145] As in Fig. 4 As can also be seen, in one embodiment a spacer rod 22 to 29 extends vertically over a height that is many times greater than the diameter of a strand of the heating element 19. Preferably, the height of the spacer rods 21 to 29 is such that, in the assembled state of this arrangement according to Fig. 4 The underside of a heating element 19 is arranged without contact with the outer surface 9a of the ceiling wall 9. Preferably, there is a vertical distance between the outer surface 9a and the underside of the heating element 19 of between 0.8 and 0.5 times the thickness of one strand of the heating element 19, and / or the heating element 19 is arranged by the spacer unit 21 at a height-adjusted distance to the outer surface 9a of the adjacent wall, here the ceiling wall 9, which is between 0.3 mm and 0.7 mm, in particular between 0.3 mm and 0.4 mm.

[0146] In Fig. 5 is a top view of the arrangement according to Fig. 3 and Fig. 4 The diagram shows examples of distances and dimensions between individual strand sections of the heating element 19 and / or spacer elements and / or position-locking elements. In one embodiment, the heating element 19 has a strand diameter of between 6 mm and 7 mm, particularly between 6 mm and 6.5 mm. In this embodiment, the position-locking bar 28 furthest from the electrical connection pieces 33 to 36 is also angled, not straight. As can also be seen in this projection, shown in the xz plane, in this embodiment the front position-locking bar 39 (viewed in the depth direction) and the rear position-locking bar 32 (closest to the electrical connection sections 33 to 36) extend further outwards in the width direction than the position-locking bars 30 and 31, which are located further centrally in this example.In one embodiment, the rod sections 26b, 29b, 22b, and 25b are also arranged further outwards in the width direction than the other rod sections 23b, 24b, 27b, and 28b. The hollow L-shaped strand sections 37h and 37g are also visible here. They are outlined with dashed lines.

[0147] In Fig. 6 In one embodiment, a perspective partial view of the muffle 8 with the arrangement according to Fig. 2 The housing 2 is shown removed here. As can be seen, a feedback element 40 is integrally formed on an outer surface 8a of the muffle 8. This feedback element 40 is a flange projecting from the outer surface 8a. Viewed vertically, it is offset downwards relative to the top wall 9. In one embodiment, it can be arranged on an outer surface of the side walls 12 and 13 of the muffle 8. In this case, it projects laterally in the width direction. In another embodiment, the flange can also be integrally formed on a trough-shaped top wall 9.

[0148] As in Fig. 6 As can be seen, this feedback element 40 extends as a continuous web or strip. It covers essentially the entire depth of the side wall 12 or 13. It can also be provided that this feedback element 40 is arranged on the outside of the rear wall 11 of the muffle 8 and projects backwards in this respect. As can be seen here, the spacer unit 21, with its bends 22a, 25a, 26a, and 29a located higher up, rests on a top surface 40a, or a side of the feedback element 40 facing the heating element 19. Furthermore, the bends 23a, 24a, 27a, and 28a abut a bottom surface 40b, or a side of the feedback element 40 facing away from the heating element 19. Thus, these multiple bends 22a to 29a encompass this feedback element 40 on both sides.The counter-coupling element 40 is thus arranged in one embodiment between the bends 22a to 29b, in particular clamped therein.

[0149] As can also be seen in this context, the feedback element 40 has, in one embodiment in particular, continuous, especially edge-open, recesses 40c and 40d ( Fig. 6 ) through which the rod sections 23b and 24b are guided from above, so that the bends 23a and 24a are arranged below the counter-coupling element 40. The rod sections 23b and 24b can be precisely positioned through these edge-opening recesses 40c and 40d. This improves the positional stability of the spacer unit 21 on the sleeve, particularly on the counter-coupling element 40. It also enables a clamping arrangement of the support and positioning rod on the opposing sections of the counter-coupling element 40 in the lateral direction. Further explanations, as described in Fig. 6 The information provided for spacer bars 22 to 25 also applies to the opposing spacer bars 26 to 29. As explained in Fig. 6 As can be seen, these bends 21a and 25a sit as top-mounted coupling parts on the upper surface 40a of the counter-coupling element 40 facing the heating element 19. The further bends 23a and 24a lie as interlocking coupling parts, gripping the underside 40b of the counter-coupling element 40 from below.

[0150] Furthermore, in Fig. 6 A muffle front flange 41 is also shown. This covers the gap 16 at the front. In the top view in Fig. 5 Here too, the strand sections of the strand shape or rod shape, which is bent or wound several times, of the heating element 19, in particular the heating part elements 37 and 38, shown in this embodiment, can be seen.

[0151] The same applies to the following: Fig. 2 , 3 and 6 to say.

[0152] In Fig. 7 is a top view of the representation in Fig. 6 shown. The further edge-opening recesses 40e and 40f of the feedback element 40 are also visible here, through which the rod sections 27b and 28b of the spacer rods 27 and 28 are passed. In an embodiment in which the heating element 19 is formed from at least two heating element sections 37 and 38, these two heating element sections 37 and 38 extend with their larger dimensions and thus with their main area in a common main area. As further shown in Fig. 7 As can also be seen, the heating element 19 is arranged within the surface dimensions of the ceiling wall 9 when viewed in a projection. This applies to all sections of the heating element 19 except for the electrical connection pieces 33 to 36.

[0153] The heating element 19 is therefore located only in an intermediate space 17, which is bounded by the adjacent and, in particular, parallel walls of the muffle 8 and the housing 2. In this example, this is formed by the ceiling wall 9 and the ceiling wall 3.

[0154] If a heating element 19 has at least two such separate and, in particular, intertwined heating sub-elements 37 and 38, then in one embodiment at least one heating sub-element is configured with a maximum heating power of greater than or equal to 2 kW. Additionally or instead, it can also be provided that the at least two heating sub-elements 37 and 38 have a total maximum heating power of greater than or equal to 3 kW in a common operating mode.

[0155] In one embodiment, the maximum heating power of one of the two heating elements 37, 38 is lower than the maximum heating power of the other heating element 37, 38. In another embodiment, the maximum heating power of the heating element with the higher maximum heating power is at least 50%, in particular at least 60%, and in particular at least a maximum of 90%, higher than the maximum heating power of the other heating element 37, 38, which has the lower maximum heating power. In another embodiment, the maximum heating power of the heating element 37, 38 with the lower maximum heating power is between 1.0 kW and 1.5 kW, in particular between 1.1 kW and 1.3 kW, and in particular 1.2 kW. In another embodiment, the maximum heating power of the heating element with the higher maximum heating power is between 2.0 kW and 2.5 kW, in particular between 2.1 kW and 2.3 kW.

[0156] In one embodiment, the maximum total heating power of the heating element 19 is between 3.0 kW and 4.0 kW, in particular between 3.2 kW and 3.6 kW, and in particular between 3.3 kW and 3.5 kW.

[0157] In particular, in one embodiment, the heating element with the greater maximum heating power is the outer heating element viewed in the projection plane, here in the embodiment the first heating element 37.

[0158] In one embodiment, the heating element 19 is designed with an area density that, when viewed in the projection plane, is larger at the edges than in the center.

[0159] In one embodiment, the maximum operating temperature of the heating element 19 is greater than 650°C, in particular greater than 700°C, and in particular between 700°C and 800°C.

[0160] In one embodiment, it is further provided that the cooking appliance 1 has a temperature sensor 42, as is the case in Fig. 7 The temperature sensor 42 is located outside the cooking chamber 14. The temperature sensor 42 is designed to detect the temperature of the heating element 19 and / or the wall adjacent to the heating element 19, in this case the ceiling wall 9 of the muffle 8. In one embodiment, the temperature sensor 42 is located in the space 17 and adjacent to and between the two heating elements 37 and 38. In another embodiment, the temperature sensor 42 is located at the hottest point during operation. This applies in particular to the hottest point between the heating elements 37 and 38. Specifically, this applies to the hottest point of the wall, in this case the ceiling wall 9 of the muffle 8, which is adjacent to the heating element, in this case the heating element 19. In another embodiment, the temperature sensor 42 can be located directly on the outer surface 9a. It can directly detect the temperature of this wall, in this case the ceiling wall 9.In one embodiment, the temperature sensor 42 is as shown in . Fig. 7 As shown, particularly in projection views, the temperature sensor 42 is arranged between the heating elements 37 and 38. In particular, it is preferably arranged here, in this projection view, at the same or substantially the same, and especially the shortest, distance to the adjacent heating elements 37 and 38. The temperature sensor 42 can be a PT sensor, in particular a PT500 or a PT1000.

[0161] If the temperature sensor 42 is not located at the hottest point of the muffle 8, which is heated by the heating element 19 adjacent to the ceiling wall 9, it is preferably provided that a temperature offset value is generated. In this case, the maximum temperature value that the temperature sensor 42 may exhibit or detect to avoid damage to the muffle wall can be lower than the value that can occur at the hottest point of this wall. For example, a maximum permissible temperature of 500°C can occur at the hottest point of the wall adjacent to the heating element 19. If the temperature sensor 42 is not located at this hottest point of the ceiling wall 9, a corresponding temperature offset value must be defined. This value can, for example, be 20°C lower.However, this is only one example, as such an offset value depends on where the temperature sensor 42 is located and what lower temperature may occur in comparison to the hottest point of the ceiling wall 9 during operation of the heating element 9.

[0162] It is also possible that several temperature sensors 42 are provided, which are arranged in the space between the two heating elements, here the space 17. They are preferably all arranged between the two heating elements 37 and 38, and, particularly when viewed in the projection plane, essentially at the same distance from the nearest areas of one heating element 37 and the other heating element 38.

[0163] In the case of a heating element 19, which has at least two separate heating sub-elements 37 and 38, the cooking appliance 1 can have a first operating mode in which only one of the two heating sub-elements, for example, the first heating sub-element 37, is activated. The second heating sub-element 38 is then deactivated. In a second operating mode, only the second heating sub-element 38 can be activated. The first heating sub-element 37 is then deactivated. In a third operating mode, both heating sub-elements 37 and 38 can be activated simultaneously. It is also possible that for each of these operating modes an individual maximum temperature threshold for the wall at the hottest point is defined, which must not be exceeded. The respective actual temperature is then measured with the at least one temperature sensor 42.When a temperature threshold is reached or exceeded, the actual heating output of the activated heating element 37 and / or 38 is reduced. This prevents overheating of the muffle 8, particularly the wall adjacent to the heating element 19, in this case the ceiling wall 9. Since the heating elements 37 and 38 have different maximum heating outputs in one embodiment, it is advantageous to define different maximum temperature thresholds for the respective operating modes, which must not be exceeded. If both heating elements 37 and 38 are activated, and thus the third operating mode is active, the highest temperature threshold can be specified. If only the heating element with the lower maximum heating output compared to the other heating element is activated, a lowest temperature threshold can be specified.In the other operating mode, in which the heating element with the higher maximum heating power compared to the other heating element is activated alone, a medium temperature threshold can be defined or specified in this regard.

[0164] In one embodiment, a cooking appliance 1 can be implemented in which the heating element 19 is identical in at least one electrical heating element parameter and / or in at least one geometric heating element parameter. An electrical heating element parameter can, for example, be the maximum heating power of the entire heating element. This means that the heating element 19 can have the same maximum heating power as the heating element 20. It is also possible that, if both heating elements 19 and 20 each have the same number of different separate heating sub-elements 37 and 38, at least two heating sub-elements of the heating elements 20 and 19, respectively, have the same maximum heating power. It is also possible that one heating sub-element of one heating sub-element 19 or 20 has the same maximum heating power as another heating sub-element of the other heating element 19 or 20.In a further embodiment, another heating element of a heating element 19, 20 can also have the same maximum heating power as the other heating element of the other heating element 19, 20.

[0165] In one embodiment, a geometric heating element parameter can, for example, be the strand length of a heating element. Another geometric heating element parameter can, for example, be the strand length of at least one of several heating sub-elements of a heating element. A further geometric heating element parameter can, for example, be the shape of a strand of a heating element and / or the size of the heating element in a plane. In particular, a heating element 18 designed as a bottom heating element can, in one embodiment, also have maximum heating powers as described above in the embodiments for the heating element 19 designed, in particular, as a top heating and / or grill heating element.

[0166] In Fig. 8 A further embodiment of a heating element 19 is shown in a perspective view. In this embodiment, the electrical connection pieces 33 to 36 are arranged asymmetrically about a central axis M. Otherwise, the shape of the at least two separate heating elements 37 and 38 is the same as in the embodiment in Figure 1. Fig. 5 In Fig. 8 Furthermore, an alternative embodiment for the spacer unit 21 is also shown. Here, it is not integrally connected to the position securing rods 39, 30, 31, and 32. Rather, the spacer rods 22, 25, 26, and 29 are separate rods. In one embodiment, these are connected by hook-in bends, of which in Fig. 8 For the sake of clarity, only a circumferential suspension 26c is shown. Otherwise, the explanations already given for other embodiments also apply to this embodiment.

[0167] In Fig. 9 Figure 1 shows a simplified front view of an embodiment of a muffle of a cooking appliance 1. In one embodiment, the thickness d2 of the side walls 12, 13 of the muffle 8 differs from the thickness d1 of the top wall 9 and / or the thickness d3 of the bottom wall 10. Additionally or instead, the thickness d2 of the side walls 12 and 13 can also differ from the thickness of the rear wall 11.

[0168] In particular, the thickness d2 is smaller than the thickness d3 of the floor wall 10 and / or smaller than the thickness d1 of the ceiling wall 9.

[0169] In one embodiment, the thickness d2 is smaller than the thickness d3 of the floor wall 10 and / or correspondingly smaller than the thickness d1 of the ceiling wall 9 by a value between 0.2 mm and 0.5 mm, in particular between 0.25 mm and 0.35 mm. In another embodiment, the thickness d2 is between 0.4 mm and 0.8 mm, in particular between 0.4 mm and 0.6 mm. In another embodiment, the thickness d3 of the floor wall 10 is between 0.6 mm and 1.0 mm, in particular between 0.7 mm and 0.9 mm. In another embodiment, the thickness d1 of the ceiling wall 9 is between 0.6 mm and 1.0 mm, in particular between 0.7 mm and 0.9 mm.

[0170] The Muffle 8 is made primarily of metal, especially steel.

[0171] In one embodiment, a base material, in particular steel, of the muffle 8 may be provided, at least in certain areas, with an additional material on an outer surface 8a facing away from the cooking chamber 14. This additional material may have a heat resistance of up to 550°C, in particular up to 530°C. This material may be applied as a coating to the outer surface 8a of the muffle 8. This material may, for example, be enamel with a heat resistance of up to 550°C, in particular up to 530°C. In one embodiment, such an additional material may also be applied, at least in certain areas, to an inner surface 8b of the muffle 8.

[0172] Furthermore, as shown in the schematic representation according to Fig. 9 In an exemplary embodiment, an additional material can be applied to the outside of the muffle 8, at least in certain areas. This additional material can, for example, be a coating 45. This coating 45 can be enamel. In particular, it can be entirely enamel. In one exemplary embodiment, this coating 45 has a thickness of between 0.050 mm and 0.100 mm, in particular between 0.060 mm and 0.080 mm, and in particular 0.070 mm, on the outside 8a of the muffle 8. Furthermore, another coating 46 can be applied to an inside 8b of the muffle 8, at least in certain areas. Here, it is also applied as an additional material. The base material can be metal, in particular steel. In one exemplary embodiment, this coating 46 has a layer thickness of between 0.100 mm and 0.200 mm, in particular between 0.140 mm and 0.160 mm, and in particular 0.150 mm.

[0173] In Fig. 10 A simplified vertical section view shows a partial area of ​​an embodiment of a cooking appliance 1.

[0174] In one embodiment, at least one thermal shielding unit 43 of the cooking appliance 1 is arranged in the space 16, particularly in the space 17. In one embodiment, the thermal shielding unit 43 is plate-like. The material of the thermal shielding unit 43 has a melting point that is higher than the maximum operating temperature of the heating element 19, which is also arranged in this space 17. In one embodiment, the thermal shielding unit 43 is made of rock wool. In another embodiment, the thermal shielding unit 43 is a mat made of fibrous material. In another embodiment, this thermal shielding unit has a thickness a of between 12 mm and 18 mm, particularly between 14 mm and 16 mm.

[0175] In one embodiment, the thermal shielding unit 43 is in direct contact with the heating element, here the heating element 19. In this embodiment, the thermal shielding unit 43 is arranged only on the side of the heating element 19 in the space 17 that faces away from the ceiling wall 9. In this embodiment, the heating element 19 is completely exposed towards the ceiling wall 9. In another embodiment, the thermal shielding unit 43 can also comprise or be a metal plate or a metal grid.

[0176] In one embodiment, the cooking appliance 1 has a thermal insulation unit 44 separate from the thermal shielding unit 43. This unit is arranged in the space 16, particularly in the space section 17. In one embodiment, the thermal insulation unit is a mat made of fibrous material. In particular, it may comprise or be made of glass wool. In one embodiment, this thermal insulation unit 44 has a thickness b. The thickness b is particularly greater than the thickness a. The thickness b can be between 20 mm and 30 mm, particularly between 24 mm and 26 mm. In particular, the material of the thermal insulation unit 44 has a melting point that is lower than the maximum operating temperature of the heating element 19. In particular, the thermal insulation unit 44 is arranged only between the heating element 19 and the top wall 3 of the housing 2.This thermal insulation unit 44 is not arranged between the heating element 19 and the ceiling wall 9 of the muffle 8. In particular, the thermal insulation unit 44 is arranged between the thermal shielding unit 43 and the ceiling wall 3 of the housing 2.

[0177] In one embodiment, a thermal insulation unit 44, in particular glass wool, can be arranged in the lower cavity 18. It can have a thickness d between 35 mm and 45 mm, in particular between 39 mm and 41 mm. This is especially true if no thermal shielding unit 43 is arranged in the lower cavity 18.

[0178] If, in an embodiment, a further heating element 20, in particular as a bottom heating element and / or grill heating element, is provided, the corresponding arrangement can be combined with a thermal shielding unit 43 and / or a thermal insulation unit 44, as shown in Fig. 9 As explained, it can also be arranged in the intermediate space 18. Here, the preferably existing thermal insulation unit 44 is located between the preferably existing thermal shielding unit 43 and the bottom wall 4 of the housing 2.

[0179] Furthermore, in the Fig. 10 In one embodiment, it can be seen that the ceiling wall 9 is uneven. A dome-like curvature, in particular an upwardly oriented curvature, is formed here. In another embodiment, the heating element 19 may also be correspondingly curved or arched. This curvature may be adapted to the curvature of the ceiling wall 9. In one embodiment, as shown in Fig. 11 As shown in a partial representation of the cooking appliance 1, the curvature is such that, viewed in the vertical direction, a distance c between the highest point of the curvature and the lowest point of a tub ceiling of the ceiling wall 9 shown here can be between 10 mm and 15 mm, in particular between 11 mm and 13 mm, for example 12 mm.

[0180] This distance c is in Fig. 11 schematically drawn. Additionally or instead, a corresponding curvature can also be formed in the bottom wall 10. Additionally or instead, the preferably present bottom heating element in the form of the heating element 20 can also be correspondingly curved. However, this is then a curvature that bulges outwards in the vertical direction.

[0181] In Fig. 12 An enlarged view shows a partial area of ​​the heating element 19. In one embodiment, the position of a temperature sensor 42 of the cooking appliance 1 is shown. Here, for example, it is tubular. It is arranged at equal or substantially equal distances d and e from the nearest points of the heating elements 37 and 38 of the heating element 19. Preferably, the shape and configuration of the heating element 19 is such that at the Fig. 12 The hottest point on the adjacent wall, in this case the ceiling wall 9 of the muffle 8, is shown. Therefore, the temperature can be measured at the hottest point of the ceiling wall 9 using the temperature sensor 42. The hottest point is defined by the heat profile of the heating element 19 during operation.

[0182] In Fig. 13 An exploded view shows an embodiment of a muffle 8 of the cooking appliance 1. In this embodiment, the muffle 8 is of a modular construction. This means, in particular, that the muffle 8 is formed from several separate, prefabricated modular components, which are then joined together after their individual manufacture, especially after their respective final shapes, using a joining process. In the embodiment shown here, the muffle 8 has the top wall 9 as a prefabricated separate component. In one embodiment, the bottom wall 10 is formed as a prefabricated separate component, also as a modular component. Furthermore, the preferably present front flange 41 is prefabricated and provided as a separate modular component of the muffle 8. In another embodiment, a one-piece modular component is formed by the side walls 12 and 13 and the rear wall 11.Thus, a U-shaped modular component or module is provided here. As in . Fig. 13 As can be seen, the ceiling wall 9 has a trough shape. Additionally or instead, the floor wall 10 can also have a trough shape. The trough shape of the ceiling wall 9 is formed by a plate-like trough ceiling 47. Furthermore, the ceiling wall 9 has a trough collar 48 with respect to its trough shape. This collar is arranged on a circumferential edge of the plate-like trough ceiling 47, in particular extending around at least three sides of the four-sided trough ceiling 47. It forms the side wall of the trough shape. As can also be seen, in one embodiment, a flange 49 of the trough shape can be additionally provided. This flange 49 is a flange projecting from the trough collar 48. It is a web that cantilevers outwards and thus laterally. This flange 49 is formed on an edge of the trough collar 48 that faces away from the trough ceiling 47.In particular, in one embodiment, this flange 49 is also the feedback element 40, or has this feedback element 40, as already explained above. In one embodiment, this trough-shaped ceiling wall 9 preferably has the thickness d1 as shown in . Fig. 9 was explained.

[0183] In one embodiment, the base wall 10 has a trough bottom 50. Furthermore, the base wall 10 has a trough collar 51. In another embodiment, a flange 52 may also be formed. This flange may also have a corresponding coupling element 40 or be the coupling element 40 itself. The trough shape of the base wall 10 can be adapted to the trough shape of the ceiling wall 9. In another embodiment, the ceiling wall 9 can also be identical in construction to the base wall 10. In particular, the trough ceiling 47 is provided with a dome-like curvature, as is the case with the Fig. 10 and Fig. 11 This was explained. Additionally or instead, this tub bottom can also be curved accordingly. Furthermore, in Fig. 13 It is also shown that in one embodiment, the side walls 12 and / or 13 and / or the rear wall 11 can have embossings 53 and 54. This allows for individual stiffening of the aforementioned walls. As a result, the entire muffle 8 is correspondingly stiffer in its assembled state.

[0184] In this context, Fig. 14 The assembled state of the muffle 8 is shown. As can also be seen here, in one embodiment, the side walls 12 and 13 and the rear wall 14 are recessed into the respective trough shape of the two trough-shaped components, corresponding to the top wall 9 and the bottom wall 10. This means that this trough shape of the top wall 9 extends horizontally further outwards in both width and depth than is given by the position of the side walls 12 and 13 and the rear wall 11. Additionally or instead, the same can be provided for the bottom wall 10, as shown in Fig. 14 This can be seen. Such construction and interlocking further increase the stability of the muffle. In one embodiment, viewed in the vertical direction, the side walls 12 and / or 13 and / or the rear wall 11 are designed to at least slightly dip into the trough shape of the ceiling wall 9 and / or the trough shape of the bottom wall 10.

[0185] Furthermore, permanent connections 55 are preferably formed between the individual module parts, namely the ceiling wall 9 and the side walls 12, 13 and the rear wall 11. These permanent connections are, in particular, welded connections. Additionally or instead of these, further permanent connections, in particular welded connections 56, are formed between the side walls 12 and 13 and the rear wall 11 as well as the bottom wall 10. In one embodiment, the front flange 41 can also be connected to the ceiling wall 9, the bottom wall 10 and the side walls 12 and 13 by a permanent connection, in particular a welded connection 57. In particular, the muffle 8 can be connected according to Fig. 13 und Fig. 14 with thicknesses d1, d2 and d3, as they are used for Fig. 9 as explained. In one embodiment, coating 45 and / or 46 may also be present.

[0186] All the embodiments presented here can each be considered individually as components of a cooking appliance. It is also possible that several of the embodiments presented here can be combined to form a further embodiment, which is also considered disclosed. For example, the various muffles 8 described here can be combined in a cooking appliance 1 with correspondingly differently shaped heating elements. Conversely, the individually described heating elements 19, 20 can also be combined with different muffles to form a specific cooking appliance. In particular, all the embodiments presented here can also be realized in a single, common embodiment of a cooking appliance.

[0187] In another embodiment, a cooking appliance 1 can have an operating device 58 ( Fig. 1 ) exhibit. These in Fig. 1 The operating device 58, shown symbolically, can also be located elsewhere. It can be attached to the cooking appliance 1, for example, to the door 15, or it can be located separately from the door, for example, on a control panel of the cooking appliance 1. The operating device 58 can be permanently installed on the cooking appliance 1. However, it is also possible for the operating device 58 to be a separate component. In this respect, it can be a portable operating device 58. For example, it can also be a communication device, such as a mobile phone. In this context, a system can then be implemented which includes at least one cooking appliance 1 and such a separate and, in particular, portable operating device 58.

[0188] The operating device 58 allows the actual heating power of one of these two heating elements 19, 20 to be set differently from the actual heating power of the other heating element 19, 20, at least in one operating mode of the cooking appliance 1 in which the heating element 19, which is in particular a top heat and / or grill heating element, and a bottom heat and / or grill heating element, which is realized, for example, by the heating element 20, are activated. The operating device 58 can be used in conjunction with a preferably present control unit 59 ( Fig. 1 ) of the cooking appliance 1. This allows signals regarding the operating device 58 to be transmitted to the control unit 59. The control unit 59, which can also be a control and / or regulating unit, can then operate the heating element 19 and / or the heating element 18 accordingly.

[0189] In this context, it is also possible that the two existing heating elements 18 and 19 have the same maximum heating output. However, they can also have different maximum heating outputs. This ability to adjust the actual heating output of at least one heating element 18, 19 differently from a maximum heating output results in a wide range of combinations and settings to provide individual total heating outputs for both heating elements when they are both in operation. Depending on the specific configuration of the actual heating output settings, either the bottom heating and / or grill element can provide more actual heating output than the top heating and / or grill element, or vice versa.In this embodiment, it is also possible that at least one of the actual heating powers can be set as a percentage of the maximum heating power of this heating element 19, 20 using the control device 58. This allows the actual heating power to be set in specific, discrete percentage increments. In another embodiment, it is also possible that the actual heating powers of the two heating elements 19, 20 can be set as a percentage ratio to each other using the control device. Here, too, both discrete values ​​for this ratio and a continuous adjustment are possible in the respective embodiments. The control device 58 can, in this context, include corresponding control elements and / or touch-sensitive control panels. Likewise, the control device 58 can also additionally include a display unit, in particular a screen. The corresponding settings can be displayed there.In this context, the values ​​and / or symbols of the heating elements 19, 20 can be displayed. In one embodiment, the set actual heating output and / or the ratio of the actual heating outputs and / or the percentage share can then be represented numerically and / or symbolically.

[0190] With the operating device 58, in one embodiment, it is also possible that, if at least one of the two heating elements 19 and / or 20 is composed of at least two separate heating elements 37 and 38, the respective specific heating element 37 and 38 can be individually selected. The selected heating element 37 and 38 is then activated accordingly. This also presents a further embodiment in which, in such a configuration, individual actual heating powers of an entire heating element 19 or 20 can be selected. In this case, either one heating element 37, the other heating element 38, or both heating elements 37 and 38 can be selected. In this embodiment, three different discrete actual heating powers can then be set for one heating element. Reference symbol list

[0191] 1 Cooking appliance 2 Housing 3 Top wall 4 Bottom wall 5 Back wall 6 Side wall 7 Side wall 8 Muffle 8a Outside 8b Inside 9 Top wall 10 Bottom wall 11 Back wall 12 Side wall 13 Side wall 14 Cooking chamber 15 Door 16 Space 17 Space area 18 Space area 19 Heating element 20 Heating element 21 Spacer unit 22-29 Spacer rod 26c Suspension 22a-29a Bend 22b-29b Rod section 30 Position securing rod 31 Position securing rod 32 Position securing rod 33-36 Connection pieces 37 Heating element 37a, b, c, d, e Strand sections 37f, g, h Strand sections 37e Connection structure 38Heating element 38a,bH leg 38c connecting leg 39 position securing rod 40 counter-coupling element 40a top 40b bottom 40c recess 40d recess 40e recess 40f recess 41 muffle front flange 42 door 43 shielding unit 44 insulation unit 45 coating 46 coating 47 tub ceiling 48 tub collar 49 flange 50 tub bottom 51 tub collar 52 flange 53 embossings 54 embossings 55 connection 56 welded connection 57 welded connection 58 operating device 59 control unit M center axis c distance d distance e distance x lateral direction y vertical direction z depth direction

Claims

1. Cooking appliance (1) having a housing (2), a muffle (8) which is arranged in the housing (2) and which defines a cooking chamber (14) of the cooking appliance (2) with walls (9, 10, 11, 12, 13), and having at least one heating element (19, 20) which is arranged outside the muffle (8) in an intermediate space (16) between the housing (2) and the muffle (8), wherein the heating element (19, 20) is arranged only in an intermediate space region (17, 18) which is formed between only one wall (9 to 13) of the muffle (8) and an outer wall (3, 4) of the housing (2) arranged spaced apart therefrom and at least substantially parallel thereto, wherein the heating element (19, 20) has a first heating sub-element (37) and the heating element (19, 20) has a separate second heating sub-element (38), wherein when viewed in a projection plane which is located parallel to a main extension surface of the heating element (19, 20), the one heating sub-element (38) is surrounded by the other heating sub-element (37), wherein the heating sub-elements (37, 38) can be operated independently of one another in possible operating modes, and can be operated jointly in a further operating mode, wherein the cooking appliance (1) has at least one temperature sensor (42) at least for detecting the temperature of the wall (9, 10) of the muffle (8), wherein the temperature sensor (42) is arranged in the intermediate space region (17, 18) and is arranged adjacent to and between both heating sub-elements (37, 38), and by which in the operating modes of the heating element (19, 20) the temperature of the wall (9, 10) of the muffle (8) can be detected in each case, characterised in that the temperature sensor (42) is at a spacing (d, e) from the first heating sub-element (37) which is the same or substantially the same as the spacing of the temperature sensor (42) from the second heating sub-element (38).

2. Cooking appliance (1) according to claim 1, characterised in that the temperature sensor (42) bears directly against an outer face (8a) of the muffle (8).

3. Cooking appliance (1) according to one of the preceding claims, characterised in that the temperature sensor (42) is a PT sensor, in particular a PT500 or a PT1000.

4. Cooking appliance (1) according to one of the preceding claims, characterised in that the temperature sensor (42) is tubular at least in some regions.

5. Cooking appliance (1) according to one of the preceding claims, characterised in that an electrical line to the temperature sensor (42) is arranged in the intermediate space (16) and is insulated by a thermal insulating element () from the heating element (19, 20), in particular is routed in a thermal shielding unit (43) of the cooking appliance (1) which is arranged in the intermediate space (16).

6. Cooking appliance (1) according to one of the preceding claims, characterised in that at least one heating sub-element (37, 38) has a maximum heat output of greater than or equal to 2 kW, and / or in the further operating mode the two heating sub-elements (37, 38) have a total maximum heat output of greater than or equal to 3 kW.

7. Cooking appliance (1) according to one of the preceding claims, characterised in that a maximum heat output of a heating sub-element (37, 38) is less than the maximum heat output of the other heating sub-element (37, 38).

8. Cooking appliance (1) according to one of the preceding claims, characterised in that the maximum heat output of the heating sub-element (37, 38) with the greater maximum heat output is greater by at least 50%, in particular at least 60%, in particular a maximum of 90%, than the maximum heat output of the heating sub-element (37, 38) with the lower heat output.

9. Cooking appliance (1) according to one of the preceding claims, characterised in that the maximum heat output of the heating sub-element (37, 38) with the lower heat output is between 1.0 kW and 1.5 kW, in particular between 1.1 kW and 1.3 kW, and / or the maximum heat output of the heating sub-element (37, 38) with the greater heat output is between 2.0 kW and 2.5 kW, in particular between 2.1 kW and 2.3 kW and / or the maximum total heat output of the heating element (19, 20) is between 3.0 kW and 4.0 kW, in particular between 3.2 kW and 3.5 kW.

10. Cooking appliance (1) according to one of the preceding claims, characterised in that the maximum operating temperature of the heating element (19, 20) is greater than 650° C, in particular greater than 700° C, in particular between 700° C and 800° C.

11. Cooking appliance (1) according to one of the preceding claims, characterised in that the heating element (19, 20) is a resistance heating element.

12. Cooking appliance (1) according to one of the preceding claims, characterised in that, when viewed in the projection plane, the first heating sub-element (37) surrounds the second heating sub-element (38) in the manner of a frame, wherein the first heating sub-element (37) has a greater maximum heat output than the second heating sub-element (38).

13. Cooking appliance (1) according to one of the preceding claims, characterised in that a heating element (19, 20) is a top-heat and / or grill heating body of the cooking appliance (1) and / or a heating element (19, 20) is a bottom-heat and / or grill heating body of the cooking appliance (1).

Images