Cooking device and method for operating same

Abstract

The invention relates to a cooking appliance system comprising a cooking appliance (1) with an inner housing (12) for receiving at least one cooking chamber (31) and with at least one first heating device (15) configured to heat at least the cooking chamber (31). The cooking appliance system is characterized in that the first heating device (15) has a first heating zone (15a) configured to heat the cooking chamber (31) with a first power density, and the first heating device (15) has a second heating zone (15b) configured to heat the cooking chamber (31) with the first power density or with a second power density, wherein the second power density is greater than, preferably at least 1.5 times greater than, and particularly preferably at least twice as great as, the first power density.

Description

[0001] The invention relates to a cooking appliance according to claim 1 and a method for operating a cooking appliance according to claim 15.

[0002] Various kitchen appliances, also known as cooking appliances, are used to prepare food, which can also be referred to as items to be cooked or prepared for cooking. These include cooktops, on which food can be cooked in a cooking vessel such as a saucepan (with or without a lid), a frying pan, and the like, by boiling, frying, and other methods. The cooking vessel is placed on a cooking zone of the cooktop, and the base of the vessel is heated electrically, inductively, or similarly by the cooking zone. The cooking vessel can also be referred to as a cooking container, a food carrier, or a food receptacle. In this case, the cooking vessel provides a cooking space for the food, which, in the case of pans and pots, can be open or closed with a lid. State of the art

[0003] Cooking appliances are also known which have a stationary cooking chamber integrated with the appliance, in which the food is placed in or on a cooking dish and cooked with the cooking chamber closed. Such a cooking appliance can be, for example, an oven, a steamer, a microwave, a combination oven with a steamer and / or a microwave, and the like. Such cooking appliances with a stationary cooking chamber typically have a vertical height of approximately 45 cm, at least in Germany, although ovens with a height of approximately 60 cm are also common.

[0004] Such stationary cooking appliances have in common that they feature an outer casing, which essentially encloses the appliance and protects its individual components and elements, while also making them easily accessible. Inside the appliance, an interior space is formed, representing the cooking chamber, which is essentially enclosed by an inner casing, also known as the cooking chamber muffle or simply muffle. A cavity is formed between the inner and outer casings, in which functional elements of the appliance, such as a control unit, an electrical power supply, and other components necessary for the intended use of the appliance, can be located. From the front, i.e., viewed from the user's perspective, the outer casing, the inner casing, and a metal sheet or...A front panel separates the housing space, so that the housing space is not accessible to the user.

[0005] The interior of the cooking appliance features a front-facing access opening through which the user can enter and arrange cooking utensils within the cooking chamber. This opening also allows for the removal of cooking utensils after cooking. The access opening can be opened by the user with a locking element, such as a side-hinged door, a downward-hinged flap, or similar device. This allows access to the interior of the cooking appliance, as described above, or it can be closed to complete the cooking process. Such a locking element can be solid or have a viewing window to allow the user to see inside the closed interior of the cooking appliance.

[0006] Such cooking appliances with a fixed cooking chamber are usually designed as built-in appliances or kitchen appliances in order to be space-saving and at a height easily accessible to the user, being fixed vertically in kitchen furniture such as built-in kitchen cabinets with their outer casing and with their closing element, possibly also with their cover, see above, flush with the surfaces of the other cooking appliances, drawers, doors and the like of the kitchen furniture towards the user, which can improve the visual impression for the user.

[0007] In addition to the previously described stationary cooking appliances, these can also be combined with other built-in kitchen appliances, such as warming drawers, vacuum storage drawers, and the like, and arranged vertically one above the other or horizontally side by side, which can also perform various functions in the kitchen. Warming drawers, for example, are used to keep cooked food warm without further cooking and to preheat dishes. Vacuum storage drawers allow food to be vacuum-sealed in packaging.

[0008] These types of drawers, used as kitchen appliances, are fundamentally similar in design to the previously described fixed-chamber cooking appliances. However, the drawers are significantly shallower, meaning they are smaller vertically and must therefore be pulled forward out of the kitchen cabinet by the user to access their interior from above. For this purpose, the movable part of the drawer, which can also be called a pull-out section, has a pull-out base. This base serves to hold items such as cookware vertically from above and can be moved laterally along rails. The pull-out base typically has a vertically oriented front panel that forms the interior of the drawer.whose access opening closes when closed.

[0009] Publication US 2010 051 600 A1 shows a cooking appliance in which a heating element can be moved out of the cooking appliance as bottom heat using a pull-out mechanism.

[0010] These types of drawers, also called built-in drawers, typically have a vertical height of approximately 14 cm, at least in Germany. Drawers are usually positioned vertically beneath a cooking appliance with a fixed cooking chamber, such as a conventional oven, a steam oven, or similar appliance, or stacked vertically with another drawer. However, they can also be installed individually and independently within a kitchen cabinet. Since the installation spaces for built-in kitchen appliances in kitchen cabinets, which can also be referred to as niches, typically have a vertical height of approximately 60 cm, at least in Germany, a drawer with a height of approximately 15 cm and a cooking appliance with a fixed cooking chamber with a height of approximately 45 cm can be combined modularly to create built-in appliances.

[0011] Cooking appliances such as ovens or steam cookers with a baking function typically have a heating element located below the top of the inner casing, directed vertically downwards into the cooking chamber. These heating elements are therefore also referred to as top heating elements. In a conventional oven, for example, this top heating is usually achieved by an exposed heating coil mounted on the ceiling, which radiates intense heat downwards, thus achieving thorough browning of the food through radiant heat.

[0012] A cooking appliance with a heating device, for example as top heating, comprising two heating zones, is known from German patent application DE 10 2007 042 087 A1. Each of the two zones has a single heating circuit or heating element. The heating elements differ in power density and / or power consumption.

[0013] The publications EP 1431667 A2, WO 2019 023 399 A1 and EP 2 017 536 A1 show further designs of baking ovens.

[0014] The publication DE 10 2005 038 880 A1 shows a cooking appliance in which the heating device which provides the bottom heat is separated from the cooking chamber by a glass ceramic.

[0015] The foods being cooked require different temperatures and heat densities, and can also have different surface areas. For example, a pizza made from fresh dough has a relatively large surface area that should be heated as evenly as possible. This should be achieved with a high temperature and heat density. In contrast, a steak has a relatively small surface area that also needs to be heated as evenly as possible. However, this requires a much higher temperature and heat density, significantly higher than the high temperature used to cook the aforementioned pizza. To meet both requirements, the cooking appliance must be able to provide two different heat densities, preferably over different surface areas.

[0016] The invention addresses the problem of providing a cooking appliance system capable of generating varying power densities. This should preferably be possible on surfaces of different sizes. In particular, this should be implemented in a way that is as simple, space-saving, cost-effective, durable, robust, and / or easy to clean as possible. At the very least, an alternative to known cooking appliance systems of this kind should be created.

[0017] According to the invention, this problem is solved by a cooking appliance with the features of claim 1 and by a method with the features of claim 15. Advantageous embodiments and further developments of the invention are described in the following dependent claims.

[0018] The invention thus relates to a cooking appliance. The cooking appliance comprises, firstly, a cooking unit with an inner housing for accommodating at least one cooking chamber and with at least one first heating device, which is designed to heat at least the cooking chamber. This allows the cooking chamber and / or the food being cooked to be heated.

[0019] The terms cooking appliance and cooking appliance system used below are synonymous.

[0020] The cooking appliance system also includes a cooking chamber. A cooking chamber is understood to be a receiving space in which food can be placed for cooking. A cooking chamber can be formed, in particular, by cooking cookware and can be open or closed, as described above. Cooking cookware can be removable from the cooking appliance. Such a cooking chamber can also be formed by a fixed component of the built-in cooking appliance.

[0021] The cooking appliance according to the invention is characterized in that the first heating device has several heating elements and a first heating zone configured to heat the cooking chamber with a first power density, and a second heating zone configured to heat the cooking chamber with the first power density or with a second power density, wherein the second power density is greater than, preferably at least 1.5 times greater, and particularly preferably at least twice as great as, the first power density. Power density is understood to mean the power per unit area. The power density can be determined structurally by a corresponding design of the respective heating elements in combination with their electrical supply and can optionally be reduced by suitable electronic control of the electrical supply, as will be described in more detail below.

[0022] One aspect stipulates that the first heating zone must include at least one heating element and the second heating zone must include at least two heating elements. This allows for the creation of separate zones for different energy inputs.

[0023] Specifically, one heating element is operated in each of the first and second heating zones to deliver the first power density, and at least two heating elements are operated in the second heating zone to deliver the second power density. This simplifies the use of available electrical power, as only the required heating circuits are ever used.

[0024] The terms heating element and heating circuit are understood as synonyms in the present invention.

[0025] In other words, the cooking chamber can be heated with the first power density by operating both the first and second heating zones of the first heating device simultaneously. If the second power density is required, only the second heating zone of the first heating device can be operated. The second heating zone of the first heating device can be designed to operate with both the first and second power densities, as will be described in more detail below.

[0026] In summary, the first heating device and the second heating device each have at least three heating circuits.

[0027] In this way, a larger cooking area can be achieved with the first, lower power density by operating the first and second heating zones of the first heating element simultaneously at the first power density. This can be suitable, for example, for cooking a pizza made from fresh dough. Alternatively, a smaller cooking area can be achieved with the second, higher power density by operating only the second heating zone at the second power density, for example, to cook a steak. This allows the same cooking appliance to meet different requirements regarding power density and / or the area to be heated.

[0028] Preferably, designing the second power density to be one and a half or two times higher than the first power density can create a significant or sufficient difference between the two power densities to cook the previously described foods differently.

[0029] According to one aspect of the invention, the first heating zone is designed for the first power density and the second heating zone is designed for the second power density, wherein the second heating zone is configured to operate at either the first or the second power density. In other words, the first heating zone is designed to generate the first power density at maximum power, and the second heating zone is designed to generate the second power density at maximum power, wherein the second heating zone can also be operated at a lower power than the maximum power and then generate the first power density.

[0030] This can be one way to implement the previously described properties and advantages by ensuring that the power density of the second heating zone of the first heating device can be operated at least at the same power density as the first and second heating zones. In particular, the second heating zone of the first heating device can be designed for the higher, second power density and then reduced to the first power density through suitable electronic control, as will be described in more detail below.

[0031] According to one aspect of the invention, the third heating zone is designed for the third power density, and the fourth heating zone is designed for the fourth power density, wherein the fourth heating zone is configured to operate either at the third power density or at the fourth power density. In other words, the third heating zone is designed to generate the third power density at maximum power, and the fourth heating zone is designed to generate the fourth power density at maximum power, wherein the fourth heating zone can also be operated at a lower power than the maximum power and then generate the third power density.

[0032] This can represent a way to implement the previously described properties and advantages by enabling the power density of the fourth heating zone of the second heating device to operate at least at the third and fourth power densities. In particular, the fourth heating zone of the second heating device can be designed for the higher, fourth power density and reduced to the third power density through suitable electronic control, as will be described in more detail below.

[0033] According to one aspect, the third heating zone is designed to include at least one heating element, and the fourth heating zone to include at least two heating elements. This allows for the creation of separate zones for different energy inputs.

[0034] Specifically, to deliver the third power density, one heating element is operated in each of the third and fourth heating zones, and to deliver the fourth power density, at least two heating elements are operated in the fourth heating zone. This simplifies the use of the available electrical power, as only the required heating circuits are ever used.

[0035] According to a further aspect of the invention, at least the second heating zone and / or the fourth heating zone is configured to be operated at either the first and / or third power density or the second and / or fourth power density by means of phase-angle control, pulse-packet control, or clocking. This allows for various possibilities of changing the power density of the second heating zone of the first heating device and / or the fourth heating zone of the second heating device. In particular, the second heating zone of the first heating device and / or the fourth heating zone of the second heating device can be designed for the higher, second, or fourth power density and reduced to the first or third power density by such electronic control, so that the maximum power density can be utilized as the higher, second, or fourth power density.

[0036] According to one aspect, the first and third power densities are identical and / or the second and fourth power densities are identical. The term "identical" includes a deviation of up to 30 percent.

[0037] According to one aspect, all three heating circuits of the first heating device have the same power consumption, in particular a power consumption in the range of 800 watts to 1800 watts, preferably in the range of 1000 watts to 1650 watts.

[0038] According to one aspect, all three heating circuits of the second heating device have the same power consumption, in particular a power consumption in the range of 800 watts to 1800 watts, preferably in the range of 1000 watts to 1650 watts.

[0039] According to one aspect, all heating circuits of the first heating device and the second heating device have the same power consumption, in particular a power consumption in the range of 800 watts to 1800 watts, preferably in the range of 1000 watts to 1650 watts.

[0040] According to a further aspect of the invention, the first heating zone has a first heating circuit designed for the first power density, the second heating zone has a first heating circuit designed for the first power density, and the second heating zone further has a second heating circuit designed for the difference between the first power density and the second power density, wherein the second heating zone is configured to be operated either only with the first heating circuit or with the first heating circuit and with the second heating circuit together.

[0041] In other words, the first heating circuit and the second heating circuit of the second heating zone of the first heating device can be operated together, thereby generating the second, higher power density. If only the first heating circuit of the second heating zone of the first heating device is operated, only the first power density is delivered to the second heating zone. Thus, the first, lower power density can be generated jointly by the first heating circuit of the first heating zone and the first heating circuit of the second heating zone of the first heating device. This can be achieved over a larger area than by operating only the second heating zone of the first heating device. In this way, the previously described properties and advantages can be implemented alternatively.

[0042] According to a further aspect of the invention, the third heating zone has a first heating circuit designed for the third power density, the fourth heating zone has a first heating circuit designed for the third power density, and the fourth heating zone further has a second heating circuit designed for the difference between the third power density and the fourth power density, wherein the fourth heating zone is configured to be operated either only with the first heating circuit or with the first heating circuit and with the second heating circuit together.

[0043] In other words, the first and second heating circuits of the fourth heating zone of the second heating device can be operated together, thereby generating the fourth, higher power density. If only the first heating circuit of the fourth heating zone of the second heating device is operated, only the third power density is delivered in the fourth heating zone. The third, lower power density can thus be generated by the first heating circuit of the third heating zone and the first heating circuit of the fourth heating zone of the second heating device together. This can be achieved over a larger area than by operating only the fourth heating zone of the second heating device. This allows the previously described properties and advantages to be implemented alternatively.

[0044] According to a further aspect of the invention, the first heating zone has a first heating circuit designed for the first power density, the second heating zone has a first heating circuit designed for the first power density, and the second heating zone further has a second heating circuit designed for the second power density, wherein the second heating zone is configured to be operated either only with the first heating circuit or only with the second heating circuit. This represents an alternative way of implementing such heating and increases the design flexibility.

[0045] According to a further aspect of the invention, the third heating zone has a first heating circuit designed for the third power density, the fourth heating zone has a first heating circuit designed for the third power density, and the fourth heating zone further has a second heating circuit designed for the fourth power density, wherein the fourth heating zone is configured to be operated either with only the first heating circuit or only with the second heating circuit. This represents an alternative way of implementing such heating and increases the design flexibility.

[0046] According to the invention, the first heating zone and the second heating zone are arranged directly adjacent to each other. According to a further aspect of the invention, the second heating zone is enclosed by the first heating zone. By arranging the first and second heating zones of the first heating device adjacent to each other, a correspondingly large common heating zone can be created, which can be operated with the first, lower power density. This can be achieved in a particularly compact manner by enclosing the second heating zone within the first heating zone.

[0047] According to a further aspect of the invention, the third and fourth heating zones are arranged directly adjacent to each other; preferably, the fourth heating zone is enclosed by the third heating zone. By arranging the third and fourth heating zones of the second heating device adjacently, a correspondingly large common heating zone can be created, which can be operated with the third, lower power density. This can be achieved in a particularly compact manner by enclosing the fourth heating zone within the third heating zone.

[0048] According to a further aspect of the invention, the first heating device is arranged vertically above the cooking chamber and is designed to heat at least the cooking chamber from above. This allows the cooking chamber and / or the food being cooked to be heated from above.

[0049] According to a further aspect of the invention, the second heating device is arranged vertically below the cooking chamber and is designed to heat at least the cooking chamber from below. This allows the cooking chamber and / or the food being cooked to be heated from below.

[0050] According to one aspect, the first heating zone and the third heating zone are arranged one above the other, in particular assigned to the same first area of ​​the interior, and / or the third heating zone and the fourth heating zone are arranged one above the other, in particular assigned to the same second area of ​​the interior, in particular wherein the two areas of the interior are arranged horizontally next to each other.

[0051] Information regarding spatial orientation, such as above, below, over, under, horizontal, vertical, always refers to the operational installation position of the cooking appliance in the gravitational field of a planet.

[0052] According to a further aspect of the invention, the first heating device and / or the second heating device is a radiant heating device, preferably with at least one radiant heating element with a heating band. A radiant heating device is understood to be a device that emits its power essentially by means of infrared radiators in the form of thermal radiation. Such a radiant heating device can also be referred to as a radiant heater or a radiant heater.

[0053] This aspect of the present invention is based on the understanding that thermal radiation does not primarily heat the surrounding air it penetrates, but rather the cooking vessel or food upon which the thermal radiation strikes. The cooking vessel or food can thus be heated directly and as completely as possible by the thermal radiation, as the radiation reaches and heats the vessel or food. In other words, heating by thermal radiation does not occur through contact between the cooking vessel or food and the heated surrounding air, as in convection, but rather through the direct action of electromagnetic waves or radiation in the infrared spectral range on the cooking vessel or food.

[0054] According to the invention, this allows the degree of heating to be increased. This can accelerate the cooking process, enable cooking at higher heat levels, and / or achieve a more uniform cooking result.

[0055] For this purpose, at least one radiant heating element with a heating band can be used. In this case, the heating element consists of a free-radiating, corrugated heating band, which is arranged upright in the vertical direction and can thus emit heat radiation towards the interior of the cooking appliance and thus towards the cooking vessel or the food being cooked, via its downward-pointing edge. The heating band is therefore narrow horizontally and can thus be surrounded by relatively thick thermal insulation, which minimizes heat loss. This can keep the heating band's warm-up time comparatively short.

[0056] According to a further aspect of the invention, the radiation device comprises at least one first separating element, preferably a first glass-ceramic, which is configured to separate the radiation device from the interior of the inner housing and to allow the radiation from the radiation device to pass through, at least substantially. This provides mechanical protection, particularly for the components of the radiation device that generate the heat radiation. The first separating element can thus enclose the radiation device externally and be connected at its edges to the inner housing of the built-in oven, so that at least mechanical protection can be achieved to the extent that a user cannot reach the components of the radiation device behind the first separating element with their hand, cutlery, cooking utensils, or the like, and thereby damage or destroy them.Preferably, a seal can be provided between the edge of the first separating element and the inner housing of the built-in oven, so that steam, liquids, grease, and the like can also be kept out of the interior of the radiant heating device. This protects, in particular, the components of the radiant heating device that generate the heat radiation from moisture, grease, and the like.

[0057] Using a glass-ceramic as the first separating element can be advantageous because glass-ceramics can be very heat-resistant. They can also be smooth and therefore easy to clean. Furthermore, glass-ceramics can be sufficiently transparent to allow heat radiation to penetrate them effectively and be used primarily, or essentially, to heat the cookware as described previously.

[0058] According to a further aspect of the invention, the cooking appliance system has a second separating element configured to accommodate at least the cooking chamber, wherein at least a second heating device is arranged and configured in the vertical direction below the second separating element to heat at least the cooking chamber from below. Heating by means of the second heating device can be achieved, for example, by means of an electric heating element through electrical heat losses or inductively. This allows the food in the cooking chamber to be heated directly or a steam cooking process to be carried out within the cooking chamber.

[0059] This allows the cooking chamber to be heated vertically from two sides, so that the food inside is heated more evenly, thoroughly, and / or quickly. This can improve the quality of the cooking process and / or shorten its duration. According to the invention, the heating of the cooking vessel and / or the food can thus be accelerated by applying heat from below, preferably by induction, to heat the cooking vessel or its base, as well as from above by means of heat radiation onto the cooking vessel or directly onto the food in the case of a cooking vessel that is open at the top.

[0060] According to a further aspect of the invention, the second heating device is an induction device, preferably with at least one induction coil. This allows for inductive heating of the cooking chamber or its cookware in the vertical direction from below. A single induction coil can be as large as the base of the cookware to be used. Optionally, several induction coils can also be used together to inductively heat the cookware.

[0061] According to a further aspect of the invention, the second heating device is designed as a radiant heating device for emitting heat radiation, preferably with at least one radiant heating element with a heating band or heating tube. This allows the cooking chamber or its cooking utensils to be heated vertically from below using the same technique, preferably with the same components, as in the first heating device.

[0062] According to a further aspect of the invention, the second separating element is preferably designed as a second glass ceramic. The second separating element separates the second heating device from the interior space.

[0063] One aspect is that, when using an induction device, the second separating element is designed to essentially allow the radiation from the induction device to pass through. This allows the aspects of the corresponding second separating element of the radiation device, which will be described in more detail below, to be transferred to the induction device.

[0064] According to one aspect, the first separating element on the first heating device and the second separating element on the second heating device are made of the same material. The first and second separating elements are designed to separate the first and second heating devices from the interior space and to allow the heat radiation from the first and second heating devices to pass through essentially.

[0065] According to a further aspect of the invention, the cooking appliance has a pull-out drawer designed to be moved longitudinally in an extension direction relative to the inner housing of the cooking appliance towards the user and in the opposite insertion direction relative to the inner housing of the cooking appliance away from the user, wherein the cooking chamber, preferably the second separating element, are movable together with the pull-out drawer, preferably on a drawer base of the drawer. In other words, the built-in cooking appliance can be designed in the form of a drawer, which can simplify access to the cooking chamber for the user, since it can be partially or completely pulled out of the inner housing towards the user and can be accessed or removed vertically from above.

[0066] According to a further aspect of the invention, the drawer, preferably a drawer base of the drawer, has the second heating device. According to a further aspect of the invention, the inner housing has the second heating device.

[0067] If the first heating element is mounted so that it moves with the pull-out drawer, the second heating element, and thus the cooking vessel, can be used and heated independently of the drawer's position. Accordingly, the cooking process does not need to be interrupted if a user pulls the drawer out of the cooking appliance's inner housing towards themselves, for example, to inspect the food inside. This allows the cooking process to continue uninterrupted even in this situation. For this purpose, the second heating element can remain connected to the cooking appliance's stationary electronic components, particularly via sufficiently long and flexible electrical connections.

[0068] On the other hand, if the second heating element is permanently fixed and thus independent of the pull-out rack on the inner housing of the cooking appliance, a correspondingly simplified electrical connection can be provided, which can save costs and installation space. In this case, however, extending the rack by the user interrupts the heating from the second heating element. In other words, the second heating element can be fixed to the inner housing of the cooking appliance and cannot move with the pull-out rack. This means that the cookware cannot be heated if the pull-out rack is extended far enough from the inner housing of the cooking appliance. However, this can shorten and simplify the fixed electrical connection between the second heating element and the corresponding electronic components of the cooking appliance, which can reduce manufacturing and assembly effort and thus keep costs down.

[0069] According to a further aspect of the invention, the extension, preferably a cover of the extension, forms a closed interior space with the inner housing of the cooking appliance when the extension is fully inserted in the insertion direction. This allows the cooking chamber to be visually concealed from the user when the cooking appliance is in operation. This can also contain odors and / or vapors within the closed interior of the cooking appliance, thus preventing any unpleasantness for the user. When the cooking appliance is not in use, this reduces the space required and also avoids any visual disturbance for the user.

[0070] According to a further aspect of the invention, the cooking chamber is formed by a cooking vessel which is removable from the cooking appliance. This can increase the flexibility of use for the user and, in particular, allow them to serve the cooked food directly in the cooking vessel.

[0071] According to another aspect of the invention, the cooking appliance is designed as a built-in cooking appliance. In this way, the properties and advantages of the cooking appliance according to the invention can be implemented and utilized in built-in cooking appliances.

[0072] According to a further aspect of the invention, the built-in oven has a vertical height grid dimension corresponding to the height of a built-in drawer, which is a fraction of the width of a horizontal grid dimension. This allows for a particularly compact design of the built-in oven according to the invention. In particular, this provides a simple way to combine the built-in oven according to the invention with other standardized built-in ovens stacked vertically.

[0073] Similar to the width grid dimension described below, a height grid dimension refers to the arrangement of fitted kitchen appliances vertically. This grid allows appliances from the same or different manufacturers to be seamlessly combined. Standard height dimensions, or grids, are typically manufacturer-specific, but generally range from 6 cm to 10 cm and represent a fraction (divided by a natural number) of the width grid dimension.

[0074] Accordingly, in the European Union, it is standard practice for fitted kitchen appliances to have a corresponding installation space in the kitchen cabinet, also called a niche, with a height grid dimension of 15 cm, 45 cm, or 60 cm. Considering a base with a thickness (or height) of 10 mm or 20 mm, depending on the weight of the appliance, this results in a height grid dimension of 14 cm, 43 cm, or 58 cm for the appliance itself. In the USA, the niche height for fitted kitchen appliances is typically 24 inches or 30 inches, with an additional 6 inches for drawers. Here, too, the height grid dimension of the fitted kitchen appliances themselves is slightly less than the niche grid dimension, for example, 5 3 / 8 inches for drawers, to ensure the appliances fit into the niches.

[0075] The height and width grid dimensions of a fitted kitchen appliance always refer to its housing, since a door, flap, panel, or similar part of the fitted kitchen appliance, which faces the user when installed, typically extends in width and / or height beyond the uprights or the base of the kitchen cabinet, thus concealing it visually from the user.

[0076] According to a further aspect of the invention, the built-in oven has a grid dimension in the transverse direction with a width of [missing information]. In this way, a comparatively compact arrangement of the built-in oven according to the invention can be made possible in a kitchen unit.

[0077] A grid dimension for width refers to the way fitted kitchen appliances are arranged horizontally (i.e., in the transverse direction). This allows appliances from the same or different manufacturers to be seamlessly combined. In other words, certain width dimensions for fitted kitchen appliances are established as standard dimensions, meaning they are common and widely used. This ensures that the available space in the kitchen cabinetry can be utilized as fully as possible when combining appliances from the same or different manufacturers. These width dimensions can be considered a grid.

[0078] For example, in the European Union, a standard width of 54 cm is common for fitted kitchen appliances, allowing the appliance to be positioned between two 20 mm wide side panels of the kitchen cabinet (also called uprights), which itself has a width of 60 cm. In Switzerland, the standard width for fitted kitchen appliances is 55 cm. In the USA, a width of 18, 24, or 36 inches is common for cabinets without built-in appliances. For fitted kitchen appliances, the standard widths, including the uprights of the surrounding kitchen cabinet, are 24 and 30 inches, although 36-inch wide ovens are also known, but these are not typically designed as fitted kitchen appliances.

[0079] The present invention also relates to a cooking appliance, preferably a built-in cooking appliance, for a cooking appliance system as described above. This allows a built-in cooking appliance to be provided for implementing the cooking appliance system described above and for utilizing its features and advantages.

[0080] The present invention also relates to a cooking chamber for a cooking appliance system as described above. This provides a cooking chamber for implementing the previously described cooking appliance system and utilizing its properties and advantages.

[0081] In other words, the cooking device according to the invention, particularly a high-temperature drawer, should be able to cook as many different foods as possible. A fresh dough pizza should be able to be prepared just as easily as a steak. However, these different foods place very different demands on the cooking process. For example, a fresh dough pizza requires relatively uniform heating from above across the entire surface of the cooking chamber. To cook a steak to the desired doneness, a much higher power density is necessary than for a pizza.

[0082] However, this required power density cannot be provided with a single-phase connection if the entire cooking chamber is heated. The power output may be limited to 3.68 kW with a single-phase connection. Therefore, with this limited power output, the required power density can only be provided over a limited area of ​​the cooking chamber.

[0083] A cooking appliance according to the invention can be implemented in particular as a high-temperature drawer with a top heating element, preferably as a radiant heating element with a heating band. The heating element should enable two operating states, namely, firstly, a uniformly lower power density over the entire cooking chamber area and, secondly, a very high power density in a limited area of ​​the cooking chamber area.

[0084] According to one variant, a radiator with two different heating zones is designed such that heating zone 1 has a lower power density than heating zone 2. Heating zone 2 has a very high power density, for example, 8 W / cm². For operating state B, heating zone 2 is then permanently switched on and thus delivers a very high power density. For operating state A, heating zone 1 is then permanently switched on, and heating zone 2 is controlled in such a way that its power is reduced until its power density equals that of heating zone 1.

[0085] Various methods are possible for controlling the system.

[0086] Firstly, phase-angle control can be used by reducing the RMS value of the AC voltage through phase-angle control and consequently the power of heating zone 2.

[0087] Secondly, pulse-packet control can be used by switching heating zone 2 on and off for a specific period. The average power of heating zone 2 can be determined from the ratio between the on-time and off-time. Switching can be implemented using a semiconductor at the zero crossing of the current or voltage. This ensures that only complete cycles of the alternating current are switched.

[0088] Thirdly, clocking can be used. This is equivalent to pulse packet control. The only difference is that the time intervals between switching on and off are significantly longer. Furthermore, a switch, relay, or thermal switch can be used for switching and can be operated independently of the mains frequency.

[0089] According to a second variant, a radiator with two different heating zones is designed such that heating zone 1 consists of one heating circuit and heating zone 2 of two heating circuits. In operating state B, both heating circuits of heating zone 2 are operated. Thus, there is a very high power density in heating zone 2. In operating state A, heating zone 1 is operated, and only heating circuit 1 of heating zone 2 is used. Heating circuit 1 of heating zone 2 is dimensioned to correspond to the power density of heating zone 1.

[0090] Heating circuit 1 of heating zone 2 can be configured so that the corresponding power density is radiated across as much of the surface area of ​​heating zone 2 as possible. This can be limited by the placement of a heating element within the radiator. Heating circuit 2 of heating zone 2 can preferably also distribute its power as evenly as possible across heating zone 2, which can improve the homogeneity of the radiated power. This can also be limited by the placement of the heating element. Thus, the power density of heating zone 1 corresponds to the power density of heating zone 2 with heating circuit 1 switched on and heating circuit 2 switched off.

[0091] The second option has the advantage that, unlike the first, no complicated control system is required to reduce power consumption. Here, the heating circuits can be permanently switched using simple switches or relays.

[0092] Since standards typically limit the switching of unlimited electrical power, it can always be advantageous to divide the heating zones into multiple heating circuits, thereby reducing the power switched in each circuit. This can be done independently of, or in addition to, the division into heating circuits described in the second variant for adjusting the area-specific power density.

[0093] In principle, a combination of the two variants is also conceivable. This can be advantageous because it may allow for more efficient switching or cycling of the individual heating circuits. For EMC (electromagnetic compatibility) requirements, it may be necessary that some electrical loads are only allowed to be switched a limited number of times per unit of time, for example, only every 10 seconds. Adjusting the heating circuits can therefore provide an additional degree of flexibility for meeting the standard.

[0094] In the manner described, according to the invention, as many foods as possible can be cooked with one heating element and as many cooking process requirements and / or normative requirements as possible can be met.

[0095] The built-in oven has a standardized installation height. Specifically, the height is designed to range from 12 centimeters to 60 centimeters, preferably from 14 centimeters to 35 centimeters.

[0096] The invention also relates to a method for operating such a cooking appliance. The cooking appliance is configured to execute one operating mode from the group of the following operating modes in a given operating state. The method for operating the cooking appliance provides that one operating mode from the group of the following operating modes is executed in a given operating state.

[0097] In the first operating mode, the first heating circuit of the first heating zone and the first heating circuit of the second heating zone operate at full power, while the second heating circuit of the second heating zone is switched off. This homogeneous operation of the first heating element, the top heating element, ensures, for example, a uniform heat transfer to the food being cooked. This operating mode is particularly suitable for gratinating.

[0098] In a second operating mode, the first heating circuit of the third heating zone and the first heating circuit of the fourth heating zone operate at full power, while the second heating circuit of the fourth heating zone is switched off. This homogeneous operation of the second heating element, the bottom heating element, ensures, for example, a uniform heat transfer to the food being cooked. This operating mode is particularly suitable for blind baking pastry bases.

[0099] In a third operating mode, the first and second operating modes are combined. This means that the first and second heating elements operate simultaneously. The resulting homogeneous operation of both heating elements ensures, for example, a uniform heat transfer to the food being cooked. This operating mode is particularly suitable for pizza.

[0100] In a fourth operating mode, the first heating circuit of the second heating zone and the second heating circuit of the second heating zone are operated at full power. In this mode, the first heating circuit of the first heating zone is not operated. This intensive operation of the first heating element, the top heating element, allows for a high energy input into the food being cooked. This operating mode is particularly suitable for cooking cuts of meat, a process known as "beefing."

[0101] In a fifth operating mode, the first heating circuit of the fourth heating zone and the second heating circuit of the fourth heating zone are operated at full power. Specifically, the first heating circuit of the third heating zone is not operated. This intensive operation of the second heating element, the bottom heating element, allows for a high energy input into the food being cooked. This operating mode is particularly suitable for roasting.

[0102] In a sixth operating mode, the fourth and fifth operating modes are combined. This means that the second heating zone of the first heating element and the fourth heating zone of the second heating element are operated simultaneously. This intensive operation of both heating elements allows, for example, a high energy input into the food being cooked.

[0103] In a seventh operating mode, the heating circuits are operated alternately in a pulsed manner. This allows the available electrical power to be distributed between the heating circuits. Either the first heating circuit of the first heating zone and the first heating circuit of the second heating zone are operated at full power for a first period, or the first heating circuit of the third heating zone and the first heating circuit of the fourth heating zone (22b) are operated at full power for a second period. The resulting homogeneous operation of the two heating devices ensures, for example, a uniform energy input into the food being cooked. This operating mode is particularly suitable for pizza.

[0104] According to one aspect of the seventh operating mode, the ratio of the first duration to the second duration is balanced. This means that the cycle times of the top and bottom heat are the same or differ by less than 5 percent.

[0105] According to one aspect of the seventh operating mode, the ratio of the first and second cooking times is adjustable, particularly by the user. This allows for adjustment of the energy input, taking into account individual tastes and / or different foods being cooked. Preferably, a balanced ratio is preset. The changes can be made, for example, in increments of 10 or 20 percentage points relative to the total power. Example settings are 50:50, 55:45, 60:40, 65:35, 70:30, or 75:25.

[0106] In an eighth operating mode, the fourth operating mode is combined with the fifth operating mode, whereby the second heating zone of the first heating device and the fourth heating zone of the second heating device are operated in a pulsed manner similar to the seventh operating mode.

[0107] Another aspect is that two different foods can be cooked simultaneously in the interior, side by side on the right and left. For this purpose, the corresponding heating circuits for top heat (the first heating element) and bottom heat (the second heating element) are controlled, particularly alternately, in such a way that two heating zones are created in the interior. For example, based on the illustration of the Figure 6 on the right side with higher (radiation) power density and / or higher temperature and on the left side with lower (radiation) power density and / or lower temperature.

[0108] Several embodiments of the invention are shown schematically in the drawings and are described in more detail below. It shows Figure 1 is a side sectional view of a cooking appliance according to the invention with a partially extended cooking unit; Figure 2 is a top view from below of a first heating device of a cooking appliance according to a first embodiment; Figure 3 is a top view from below of a first heating device of a cooking appliance according to a second embodiment; Figure 4 is a top view from above of a second heating device of a cooking appliance according to a third embodiment; Figure 5 is a top view from above of a second heating device of a cooking appliance system according to a fourth embodiment; and Figure 6 is a schematic representation of a cooking appliance according to the invention with a first heating device and a second heating device.

[0109] The figures above are viewed in Cartesian coordinates. A longitudinal direction X extends, which can also be called depth X or length X. Perpendicular to the longitudinal direction X extends a transverse direction Y, which can also be called width Y. Perpendicular to both the longitudinal direction X and the transverse direction Y extends a vertical direction Z, which can also be called height Z and corresponds to the direction of gravity. The longitudinal direction X and the transverse direction Y together form the horizontal X,Y, which can also be called the horizontal plane X,Y.

[0110] Figure 1 Figure 1 shows a lateral sectional view of a cooking appliance according to the invention with the extension 2 of the cooking appliance 1 partially extended. The cooking appliance 1 is considered using the example of a built-in cooking appliance 1.

[0111] The built-in oven 1 has an outer casing 10, which can also be referred to as the outer housing 10, and which essentially encloses or surrounds the built-in oven 1 externally. An inner casing 12, which can also be referred to as the inner housing 12, is arranged inside the outer casing 10. The inner casing 12 is sealed off from the outer casing 10 in the longitudinal direction X towards the front (i.e., from the user's perspective), and vertically Z towards the bottom, so that a space 13 is formed between the outer casing 10 and the inner casing 12, which can also be referred to as the housing space 13. This space 13 constitutes the interior of the built-in oven 1. The inner casing 12 also essentially encloses an interior space 11 in which a cooking process can be carried out.The interior 11 is accessible in the longitudinal direction X for a user from the front of the built-in oven 1 through a passage opening 14 as an access opening 14.

[0112] Within the interior space 11, a pull-out shelf 20 of the pull-out unit 2 is arranged and is movable in the longitudinal direction X relative to the inside of the inner housing 12, for example, by means of pull-out mechanisms (not shown), such as rail elements or the like. A cover 21, extending perpendicularly to the pull-out shelf 20 in the vertical direction Z and in the transverse direction, is fixedly arranged on the pull-out shelf 20, which extends in the horizontal direction X, Y. This cover 21 completely covers the built-in oven 1 in the longitudinal direction X towards the user. The cover 21 can have operating elements and / or display elements to provide the user with operating options and / or display information. The cover 21 can additionally or alternatively have a viewing window, allowing the user to see through the window into the interior space 11 of the built-in oven 1.

[0113] In any case, the cover 21 of the drawer 2 can fully or partially open the passage opening 14 of the inner housing 12 for the user. For this purpose, the drawer 2 can be moved in the longitudinal direction X towards the user in an extension direction A and, in particular, pulled by the user. In the opposite direction, the insertion direction B, the cover 21 of the drawer 2 can be pushed or pressed away from the user, thereby partially or completely closing the passage opening 14 of the inner housing 12. In this state, the interior space 11 of the inner housing 12 corresponds to an extension space of the drawer 2.

[0114] In the vertical direction Z from above, at least one cooking vessel 3 can be removed by the user on the drawer base 20 of the drawer 2 when the drawer 2 is in a corresponding extended position. For this purpose, corresponding markings and / or recesses or other supports (not shown) can be provided there as positioning aids and / or positioning devices. The cooking vessel 3 can also be referred to as a cooking container 3, a food carrier 3, or a food receptacle 3. The cooking vessel 3 consists of a cooking vessel housing 30, which can also be referred to as the cooking vessel body 30, and a cooking vessel closure 32, which can also be referred to as the cooking vessel lid 32. The cooking vessel 3 has a cooking chamber 31 inside its cooking vessel housing 30, which the user closes by placing the cooking vessel closure 32 on top and opens by lifting the cooking vessel closure 32.can be made accessible.

[0115] For heating the cooking vessel 3 or the food being cooked in the vertical direction Z from above, the built-in cooking appliance 1 has a first heating device 15 in the form of a radiant heating element 15 arranged in the vertical direction Z directly below and fixed to the inner housing 12. The radiant heating element 15 is enclosed by a first separating element 17 in the form of a first glass-ceramic 17 such that the first glass-ceramic 17 seals gas-tight and vapor-tight with the inner housing 12, thereby allowing all components, and in particular all electronic components, of the radiant heating element 15 to be arranged within the first glass-ceramic 17 and thus protected from mechanical impact and moisture.Within the first glass ceramic 17, a radiant heating element with a collar 16 extending horizontally X, Y is arranged and aligned, emitting heat radiation in the infrared spectral range primarily in the vertical direction Z downwards into the interior 11 of the built-in oven 1 during operation. This allows heat radiation to act on the cooking vessel 3 or the food being cooked from above in the vertical direction Z, heating it relatively directly, quickly, and / or with minimal loss.

[0116] To heat the cooking vessel 3 or the food being cooked from below, the built-in oven 1 has a second heating device 22 in the form of an induction device 22, located in the vertical direction Z below the pull-out shelf 20 and moving with the pull-out shelf 2. In the area of ​​the induction device 22, the pull-out shelf 20 is designed as a second separating element 23 in the form of a second glass-ceramic surface 23, onto which the cooking vessel 3 can be placed from above in the vertical direction Z. The induction device 22 has an induction coil 24 in the horizontal direction X, Y, which can be operated by an induction generator 25. The generator 25 is fixedly arranged in the space 13 and is flexibly connected to the induction coil 24 by cables, allowing the induction coil 24 to move with the pull-out shelf 2 in the longitudinal direction X.

[0117] According to the invention, the cooking vessel 3, which can fill the interior 11 of the built-in oven 1 as completely as possible, at least in the horizontal planes X, Y, and the food in the cooking vessel 3 can be heated both inductively from below and by means of heat radiation from above. This allows, particularly through heat radiation from above, a particularly strong heating of the cooking chamber 31 and / or the food contained therein, thereby accelerating cooking processes and enabling cooking processes that require particularly high temperatures.

[0118] Designing the built-in oven 1 as a drawer according to the invention, and optionally arranging it in a kitchen cabinet, can enable a particularly compact and space-saving implementation of the properties and advantages described above.

[0119] In particular, according to the invention, the volume of the interior 11 of the built-in oven 1 can be reduced in this way. Furthermore, the two heating devices 15, 22 can be positioned as close as possible to the cooking chamber 31 in the vertical direction Z. By designing the second heating device 22 as an induction device 22, the cooking chamber 31 or its cooking vessel housing 30 can be heated directly from below in the vertical direction Z. By designing the first heating device 15 as a radiant device 15, the cooking chamber 31 can be heated directly from above by means of thermal radiation in the vertical direction Z. This allows the temperature and / or the power density of a cooking process to be increased and / or the heating time, the reaction time, the cooking time, and / or the energy consumption of the cooking process to be reduced.

[0120] This can be achieved in particular by means of a built-in cooking appliance 1 according to the invention, which has a standardized height in the vertical direction Z of 14 cm and a standardized width in the transverse direction of 54 cm. Similar to a previously known warming drawer or the like, the built-in cooking appliance 1 according to the invention can thus be arranged in the vertical direction Z below, for example, an oven, in order to use the respective cooking options simultaneously and independently of one another. If the oven is designed with a comparatively small height in the vertical direction Z of 43 cm, the built-in cooking appliance 1 according to the invention and the known oven can be used together in a standardized furniture niche with a total height in the vertical direction Z of 58 cm and a width in the transverse direction of 54 cm, in particular with a depth in the longitudinal direction X of 60 cm.This can enable users to access and utilize expanded cooking options beyond those previously known, or allow familiar cooking options to be made available in a comparatively small and standardized installation space.

[0121] Figure 2 Figure 1 shows a top view of a first heating device 15 of a cooking appliance according to a first embodiment of the invention, from below. The first heating device 15 is rectangular and partially covers the ceiling (not labeled) of the inner housing 12 in the horizontal X, Y plane, see Figure 1. Figure 1 . The area of ​​the first heating device 15 is essentially formed by a first, rectangular heating zone 15a, which encloses a second, circular heating zone 15b.

[0122] According to the first embodiment of the Figure 2The first heating zone 15a is configured to heat the cooking chamber 31 with a first power density. The second heating zone 15b is configured to heat the cooking chamber 31 with either the first power density or a second power density, the second power density being significantly higher than the first power density.

[0123] If the first heating zone 15a and the second heating zone 15b are operated together at the first, lower power density, the cooking chamber 31 can be heated with a comparatively high power density and a comparatively large and essentially rectangular area. This type of heating can be suitable, for example, for cooking a pizza.

[0124] If, instead, only the second heating zone 15b is operated with the second, higher power density, the cooking chamber 31 can be heated with a significantly higher power density but a comparatively small, circular area. This can be suitable, for example, for cooking a steak. The second heating zone 15b can be designed for the second, higher power density and its power density can be electronically reduced for simultaneous operation with the first heating zone 15a, which can be designed for the first, lower power density.

[0125] Figure 3Figure 1 shows a top view of a first heating device 15 of a cooking appliance according to a second embodiment of the invention. In this case, the previously described distinction between the two power densities is implemented by the fact that the first heating zone 15a has only a first heating circuit 15aa, which is designed for the first, lower power density, as described above. In the area of ​​the second heating zone 15b, a first heating circuit 15ba and a second heating circuit 15bb are arranged superimposed on each other in such a way that the second, higher power density can be generated in the second heating zone 15b by the joint operation of the first heating circuit 15ba and the second heating circuit 15bb of the second heating zone 15b. If only the first heating circuit 15ba of the second heating zone 15b is operated, the first, lower power density is generated.This can simplify the implementation of the previously described properties and advantages regarding electronic control.

[0126] Figure 4 Figure 1 shows a top view of a second heating device 22 of a cooking appliance according to a third embodiment. The second heating device 22 is rectangular and partially covers the bottom (not labeled) of the inner housing 12 in the horizontal X, Y plane, see Figure 2. Figure 1 . The area of ​​the second heating device 22 is essentially formed by a third, rectangular heating zone 22a, which encloses a fourth, circular heating zone 22b.

[0127] According to the first embodiment of the Figure 2The third heating zone 22a is configured to heat the cooking chamber 31 with a third power density. The fourth heating zone 22b is configured to heat the cooking chamber 31 with either the third power density or a fourth power density, where the fourth power density is significantly higher than the third power density.

[0128] If the third heating zone 22a and the fourth heating zone 22b are operated together with the third, lower power density, the cooking chamber 31 can be heated with a comparatively high power density and a comparatively large and essentially rectangular area. This type of heating can be suitable, for example, for cooking a pizza.

[0129] If, instead, only the fourth heating zone 22b is operated with the fourth, higher power density, the cooking chamber 31 can be heated with a significantly higher power density but a comparatively small, circular area. This can be suitable, for example, for cooking a steak. The fourth heating zone 22b can be designed for the fourth, higher power density and its power density can be electronically reduced for joint operation with the third heating zone 22a, which can be designed for the third, lower power density.

[0130] Figure 5Figure 1 shows a top view of a second heating device 22 of a cooking appliance according to a fourth embodiment of the invention. In this case, the previously described distinction between the two power densities is implemented by the fact that the third heating zone 22a has only a first heating circuit 22aa, which is designed for the third, lower power density, as described above. In the area of ​​the fourth heating zone 22b, a first heating circuit 22ba and a second heating circuit 22bb are arranged superimposed on each other in such a way that the fourth, higher power density can be generated in the fourth heating zone 22b by the joint operation of the first heating circuit 22ba and the second heating circuit 22bb of the fourth heating zone 22b. If only the first heating circuit 22ba of the fourth heating zone 22b is operated, the third, lower power density is generated.This can simplify the implementation of the previously described properties and advantages regarding electronic control.

[0131] Figure 6 Figure 1 shows a schematic representation of another embodiment of the cooking appliance 1 with a first heating device 15, a second heating device 22 and an interior space 11 arranged vertically between the two heating devices 15, 22. This interior space itself performs the function of the cooking chamber 31 or serves to accommodate a cooking chamber 31 that can be removed from the interior space 11.

[0132] The first heating element 15 functions as a top heating element in relation to the cooking chamber and comprises a first heating zone 15a with only one heating circuit 15aa and a second heating zone 15b with two further heating circuits 15ba and 15bb. The first heating circuit 15aa is designed to provide the first, lower power density, as described above. In the area of ​​the second heating zone 15b, the first heating circuit 15ba and the second heating circuit 15bb are arranged superimposed on each other in such a way that the second, higher power density can be generated in the second heating zone 15b by the joint operation of the first heating circuit 15ba and the second heating circuit 15bb of the second heating zone 15b. If only the first heating circuit 15ba of the second heating zone 15b is operated, for example together with the first heating circuit 15aa of the first heating zone 15a, the first, lower power density is generated.This can simplify the implementation of the previously described properties and advantages regarding electronic control.

[0133] The second heating element 22 functions as a bottom heating element in relation to the cooking chamber and comprises a third heating zone 22a with only one first heating circuit 22aa and a fourth heating zone 22b with two heating circuits 22ba and 22bb. The first heating circuit 22aa is designed to provide the third, lower power density, as described above. In the area of ​​the fourth heating zone 22b, a first heating circuit 22ba and a second heating circuit 22bb are arranged superimposed on each other in such a way that the fourth, higher power density can be generated in the fourth heating zone 22b by the joint operation of the first heating circuit 22ba and the second heating circuit 22bb of the fourth heating zone 22b. If only the first heating circuit 22ba of the fourth heating zone 22b is operated, for example together with the first heating circuit 22aa of the third heating zone 22a, the third, lower power density is generated.This can simplify the implementation of the previously described properties and advantages regarding electronic control.

[0134] The first heating zone 15a is spatially arranged above the third heating zone 22a and adjacent to it, above the fourth heating zone 22b, is the second heating zone 15b. Reference numeral list (part of the description)

[0135] A Extraction direction B Insertion direction h Height of the height grid dimension XL Longitudinal direction; depth; length Y Transverse direction; width Z Vertical direction; height X, Y Horizontal; horizontal plane 1 (Built-in) cooking appliance 10 Outer casing; outer housing 11 Inner chamber 12 Inner casing; inner housing 13 Intermediate space; housing space 14 Passage opening; access opening 15 First heating device; radiant device 15a First heating zone of the first heating device 15 15aa First heating circuit of the first heating zone 15a 15b Second heating zone of the first heating device 15 15ba First heating circuit of the second heating zone 15b 15bb Second heating circuit of the second heating zone 15b 16 Radiant heating element with heating band 17 First separating element; first glass ceramic 2 Extraction 20 Extraction base 21 Cover 22 Second heating device; induction device 22 First heating zone of the first heating device 15 22 First heating circuit of the first heating zone 15a 22 Second heating zone of the first heating device 15 22 First heating circuit of the second heating zone 15b 22 Second heating circuit of the second heating zone 15b 23 Second separating element; second glass ceramic 24 Induction coils 25 Induction generator 3Cookware; cooking vessel; food carrier; food holder 30Cookware housing; cooking vessel body 31Cooking chamber 32Cookware closure; cooking vessel lid

Claims

1. Cooking appliance (1) comprising at least one cooking chamber (31), comprising an inner housing (12) for accommodating the at least one cooking chamber (31) and comprising at least one first heating device (15) which has at least three heating circuits (15aa, 15ba, 15bb) and is designed to heat the cooking chamber (31), wherein the first heating device (15) has a first heating zone (15a) which is designed to heat the cooking chamber (31) at a first power density, and wherein the first heating device (15) has a second heating zone (15b) which is designed to heat the cooking chamber (31) at the first power density or at a second power density, wherein the second power density is greater than, preferably at least 1.5 times greater than, particularly preferably at least 2 times greater than, the first power density, wherein the first heating zone (15a) and the second heating zone (15b) are arranged directly next to one another, wherein the first heating device (15) is arranged above the cooking chamber (31) in the vertical direction (Z) and is designed to heat at least the cooking chamber (31) from above, characterised in that the cooking appliance (1) has at least one second heating device (22), wherein the second heating device (22) is arranged below the cooking chamber (31) in the vertical direction and is designed to heat at least the cooking chamber (31) from below, wherein the second heating device (22) has at least three heating circuits (22aa, 22ba, 22bb).

2. Cooking appliance (1) according to any of the preceding claims, characterised in that the first heating device (15) is a radiation device (16), preferably comprising at least one radiant heater having a heating band or heating tube.

3. Cooking appliance (1) according to the preceding claim, characterised in that the cooking appliance (1) has at least one first separating element (17), preferably in the form of a first glass-ceramic (17), which is arranged between the first heating device (15) and an interior space (11) of the inner housing (12), as a result of which the first heating device (15) is separated from the interior space (11) of the inner housing (12), and which at least substantially allows the heat radiation from the first heating device (15) to pass through.

4. Cooking appliance (1) according to any of the preceding claims, characterised in that the cooking appliance (1) has a second separating element (23) which is designed to accommodate at least the cooking chamber (31), wherein the at least one second heating device (22) is arranged below the second separating element (23) in the vertical direction (Z) and is designed to heat at least the cooking chamber (31) from below.

5. Cooking appliance (1) according to the preceding claim, characterised in that the second heating device (22) is designed as an induction device (22), preferably comprising at least one induction coil (24), and / or the second heating device (22) is designed as a radiation device (22) for emitting heat radiation, preferably comprising at least one radiant heater (16) having a heating band or heating tube.

6. Cooking appliance (1) according to either of the two preceding claims, characterised in that the second separating element (23), preferably in the form of a second glass-ceramic (23), is designed to separate the second heating device (22) from the interior space (11) and to substantially allow the heat radiation from the second heating device (22) to pass through.

7. Cooking appliance (1) according to any of the three preceding claims, characterised in that the second heating device (22) has a third heating zone (22a) which is designed to heat the cooking chamber (31) at a third power density, and wherein the second heating device (22) has a fourth heating zone (22b) which is designed to heat the cooking chamber (31) at the third power density or at a fourth power density, in particular wherein the second power density is greater than, preferably at least 1.5 times greater than, particularly preferably at least 2 times greater than, the first power density.

8. Cooking appliance (1) according to any of the four preceding claims, characterised in that the first power density and the third power density are identical to one another with a deviation of at most 30 percent and / or the second power density and the fourth power density are identical to one another with a deviation of at most 30 percent.

9. Cooking appliance (1) according to any of the preceding claims, characterised in that the first heating zone (15a) has a first heating circuit (15aa) and the second heating zone (15b) has a first heating circuit (15ba) and a second heating circuit (15bb) and / or the third heating zone (22a) has a first heating circuit (22aa) and the fourth heating zone (22b) has a first heating circuit (22ba) and a second heating circuit (22bb).

10. Cooking appliance (1) according to any of the preceding claims, characterised in that the first heating circuit (15aa) of the first heating zone (15a) and the first heating circuit (15ba) of the second heating zone (15b) are arranged next to one another and / or the first heating circuit (22aa) of the third heating zone (22a) and the first heating circuit (22ba) of the fourth heating zone (22b) are arranged next to one another and / or the first heating circuit (15ba) of the second heating zone (15b) and the second heating circuit (15bb) of the second heating zone (15b) are arranged one inside the other, in particular wherein the first heating circuit (15ba) of the second heating zone (15b) is surrounded by the second heating circuit (15bb) of the second heating zone (15b) or the second heating circuit (15bb) of the second heating zone (15b) is surrounded by the first heating circuit (15ba) of the second heating zone (15b) and / or the first heating circuit (22ba) of the fourth heating zone (22b) and the second heating circuit (22bb) of the fourth heating zone (22b) are arranged one inside the other, in particular wherein the first heating circuit (22ba) of the fourth heating zone (22b) is surrounded by the second heating circuit (22bb) of the fourth heating zone (15b) or the second heating circuit (22bb) of the fourth heating zone (22b) is surrounded by the first heating circuit (22ba) of the fourth heating zone (22b).

11. Cooking appliance (1) according to any of the preceding claims, characterised in that the first heating zone (15a) has a first heating circuit (15aa) which is designed for the first power density, and the second heating zone (15b) has a first heating circuit (15ba) which is designed for the first power density, and the second heating zone (15b) further has a second heating circuit (15bb) which is designed for the difference between the first power density and the second power density, and wherein the second heating zone (15b) is designed to be operated either only with the first heating circuit (15ba) or with the first heating circuit (15ba) and with the second heating circuit (15bb) together and / or the third heating zone (22a) has a first heating circuit (22aa) which is designed for the first power density, the fourth heating zone (22b) has a first heating circuit (22ba) which is designed for the first power density, and the fourth heating zone (22b) further has a second heating circuit (22bb) which is designed for the difference between the first power density and the second power density, wherein the fourth heating zone (22b) is designed to be operated either only with the first heating circuit (22ba) or with the first heating circuit (22ba) and with the second heating circuit (22bb) together.

12. Cooking appliance (1) according to any of the preceding claims, characterised in that the cooking appliance (1) has a pull-out element (2) which is designed to be moved in the longitudinal direction (X) in a pull-out direction (A) relative to the inner housing (12) of the cooking appliance (1) towards a user, and in the longitudinal direction (X) in an opposite insertion direction (B) relative to the inner housing (12) of the cooking appliance (1) away from a user, wherein the cooking chamber (31), and preferably the second separating element (23), are movable along with the pull-out element (2), preferably on a pull-out-element base (20) of the pull-out element (2).

13. Cooking appliance (1) according to the preceding claim, characterised in that the pull-out element (2), preferably a pull-out-element base (20) of the pull-out element (2), has the second heating device (22) and / or the inner housing (12) has the second heating device (22).

14. Cooking appliance (1) according to either of the two preceding claims, characterised in that the pull-out element (2), preferably a panel of the pull-out element (2), together with the inner housing (12) of the cooking appliance (1) forms a closed interior space (11) of the cooking appliance (1) when the pull-out element (2) is completely inserted in the insertion direction (B).

15. Method for operating a cooking appliance (1) which is implemented according to one of the preceding claims, characterised in that the cooking appliance (1) is operated in at least one operating mode from the group of the following operating modes: a) a first operating mode in which the first heating circuit (15aa) of the first heating zone (15a) and the first heating circuit (15ba) of the second heating zone (15b) are operated at full power, wherein the second heating circuit (15bb) of the second heating zone (15b) is switched off; or b) a second operating mode in which the first heating circuit (22aa) of the third heating zone (22a) and the first heating circuit (22ba) of the fourth heating zone (22b) are operated at full power, wherein the second heating circuit (22bb) of the fourth heating zone (22b) is switched off; or c) a third operating mode in which the first operating mode is combined with the second operating mode; or d) a fourth operating mode in which the first heating circuit (15aa) of the second heating zone (15a) and the second heating circuit (15ba) of the second heating zone (15b) are operated at full power; or e) a fifth operating mode in which the first heating circuit (2aa) of the fourth heating zone (22a) and the second heating circuit (22ba) of the fourth heating zone (22b) are operated at full power; or f) a sixth operating mode in which the fourth operating mode is combined with the fifth operating mode; or g) a seventh operating mode in which in alternation and in a clocked manner either the first heating circuit (15aa) of the first heating zone (15a) and the first heating circuit (15ba) of the second heating zone (15b) are operated at full power for a first duration or the first heating circuit (22aa) of the third heating zone (22a) and the first heating circuit (22ba) of the fourth heating zone (22b) are operated at full power for a second duration, in particular wherein the ratio of the first duration to the second duration is balanced or adjustable.

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