Cooking device

Abstract

Cooking device (1), wherein the cooking device (1) comprises at least two units (2, 3, 4), a fireplace (2) and an oven unit (3), wherein the oven unit (3) comprises a bottom heat storage unit (5) facing the fireplace (2) and a ceiling heat storage unit (6) facing away from the fireplace (2), and wherein the latter comprises a ceiling heat storage element (10) having a perforation (11) and ceiling heat insulation (13), wherein the ceiling heat storage element (10) is arranged on an outer surface of a ceiling wall (8) facing away from a cooking chamber (7) of the oven unit (3), and the ceiling heat insulation (13) is arranged on an outer surface of the ceiling heat storage element (10) facing away from the cooking chamber (7) of the oven unit (3).The floor heat storage system (5) facing the fireplace (2) also comprises a floor wall (27) of the oven unit (3) that partially delimits the cooking chamber (7) of the oven unit (3), as well as a floor heat storage element (28) arranged on an outer surface of the floor wall (27) facing the fireplace (2) and a floor heat insulation element (36) arranged on an outer surface of the floor heat storage element (28) again facing the fireplace (2), wherein the thermal conductivity of the floor heat storage system (5) differs in height from the thermal conductivity of the ceiling heat storage system (6).

Description

[0001] The invention relates to a cooking device, wherein the cooking device comprises at least two units, namely a fireplace and an oven unit. The oven unit has a bottom heat storage system facing the fireplace and a ceiling heat storage system facing away from the fireplace. Furthermore, the thermal conductivity of the bottom heat storage system differs from that of the ceiling heat storage system with respect to height.

[0002] Cooking over an open fire, especially grilling, remains very popular. Particularly among homeowners and / or gardeners, portable grilling solutions, often built into the walls and offering multiple cooking options, are replacing the simple, classic grill.

[0003] Outdoor grill combinations are known in the prior art, featuring a classic grilling area heated by a fire and a (pizza) oven also heated by the same fire. Designs are known in which such an oven is located, for example, above or to the side of the grilling area.

[0004] In the above context, US Patent 4,702,224 A describes, for example, a stationary, essentially brick-built outdoor grill combination which, in addition to a grill pit heated by a firebox and located above the firebox, includes an oven and optionally a further grilling area. The oven is located to the side of the firebox; the optional further grilling area is in turn located to the side of the oven. The oven is at least partially surrounded by an insulating material such as fiberglass.

[0005] Especially among the aforementioned homeowners and / or garden owners, there is often a desire or even a need to minimize or even avoid smoke and / or odor nuisance in the surrounding area caused by heating and / or cooking.

[0006] In this sense, US 4 702 224 A also describes a metal drip tray located between the fireplace and the grill pit, through which dripping material from the fireplace is diverted.

[0007] DE 20 2004 018 641 U1 discloses, in connection with minimizing cooking-related smoke and the associated odor nuisance as well as minimizing otherwise harmful substances, an immobile grill fireplace with a grill grate which has lamellae and a grease drainage channel for collecting and draining fat, so that the draining fat is directed into a drip edge on a grate frame of the grill grate.

[0008] Furthermore, DE 20 2009 014 563 U1 discloses a grill grate with several grill grate bars arranged in two overlapping rows, which have an approximately V-shaped profile, addressing a comparable problem. These grill grate bars are arranged at an angle and terminate on one side in a grease drainage channel.

[0009] With regard to the realization of multiple cooking options within a single grilling solution, WO 2012 / 123 875 A1 also specifies a portable camping grill, which is modular in design. Furthermore, the camping grill comprises a base unit mounted on several legs, which serves as a combustion chamber for combustible materials such as wood. Above the base unit is a ring-shaped boiler unit, i.e., a water reservoir for providing hot water, which can be dispensed via a tap. Above this boiler unit is a grill unit with a grill grate, and above the grill unit is an oven unit. A pizza stone is provided within the oven unit, which can be positioned on various vertical levels within the oven unit.However, due to the insufficient heat distribution, an appealing preparation result for a dish such as a pizza cooked in such an oven unit is hardly to be expected.

[0010] Especially with immobile and / or essentially stationary outdoor grill combinations, in addition to minimizing smoke and / or odor nuisance, a design-related, inadequate preparation result is unacceptable, particularly due to the increased purchase costs.

[0011] Against this background, existing technologies already offer solutions for controlling heat distribution in a grill depending on the food being grilled. US 5,313,877 A describes a grill with interconnected openings in the walls of a lower housing section and a lid that pivots relative to the lower housing section. These openings can be at least partially closed by means of a baffle. This allows the convection-induced heat transfer from a gas burner to the lid area to be controlled, while a drip tray prevents direct heat transfer between the lower housing section and the lid.

[0012] However, none of the aforementioned solutions are suitable for providing the most even heat distribution possible in the oven, especially when the oven is located at a distance from the fireplace.

[0013] Furthermore, DE 10 2018 003 596 A1 relates to a baking insert for a combustion oven, designed to enable improved temperature control. Unlike conventional baking inserts, the baking chamber is not heated directly by the heat source, but by flue gas, which is routed around the baking chamber in a flue gas channel. This channel ensures even heating through top and bottom heat. A sliding control allows the flue gas flow to be regulated, enabling the baking chamber to be heated or food to be kept warm. In addition, the base plates consist of several layers of metal to ensure even heat distribution and prevent burning of the baked goods.

[0014] German patent DE 42 11 378 A1 describes an insulating layer for small ovens designed to reduce heat loss and enable longer baking times after an initial heating. The design assumes that conventional small ovens have insufficient insulation and high heat loss, necessitating frequent reheating. This problem is solved by a multi-layered construction: an inner fireclay layer stores the heat, followed by a layer with recesses for radiant heat transfer, a concrete layer for heat storage, and an insulating mineral wool layer. This arrangement slows down heat transfer, reduces fuel consumption, and extends the lifespan of the stored heat.

[0015] Furthermore, DE 38 09 376 A1 discloses a portable stone oven that can be used for both baking and smoking. The oven has a fuel chamber below the treatment chamber, separated by an intermediate floor with closable smoke vents. For baking, refractory stone slabs are placed on the intermediate floor, creating a closed baking chamber. For smoking, these slabs are removed, allowing smoke from the fuel chamber below to flow through the treatment chamber. A separate smoking pot enables the generation of smoke with adjustable air supply. An intermediate wall can be integrated to improve smoke cooling.

[0016] The JP 2006-230210A oven features a removable baking chamber for foods such as bread, pastries, and pizza, designed to improve heat transfer. Compared to conventional stone or ceramic ovens with smooth interior surfaces, this oven utilizes a structure with grooves, ribs, or raised areas on the inside or outside to increase the contact area with the heat source. This is intended to improve heat transfer and radiant heat output, resulting in faster preheating, higher baking efficiency, and lower energy consumption. The structure can be configured in various ways, for example, with vertical or horizontal ridges or different geometric shapes. Furthermore, air circulation is optimized by special guide elements to ensure even heat distribution.

[0017] FR 2 468 839 A1 further describes a combination oven that serves both for cooking and heating living spaces, using wood as its primary fuel. Conventional open fireplaces or wood-burning stoves often have low efficiency and high fuel consumption, while classic wood-fired ovens are expensive and bulky. The combination oven consists of a load-bearing casing, a firebox with an ash pan, and a fireproof baking chamber above it. An outer casing encloses the baking chamber, except for the bottom. Movable elements direct hot combustion gases either directly into the baking chamber or between the baking chamber and the outer casing. The flue for smoke and cooking vapors is adjustable. The baking chamber is made of heat-retaining material, while the outer casing is preferably made of corrosion-resistant metal with high heat reflectivity. Additional layers are provided for thermal insulation.The combination stove can direct warm air into a room to be heated or be integrated into a central heating system via integrated heat exchangers.

[0018] The generic patent FR 2 554 215 A1 already specifies a cooking device comprising at least two units: a fireplace and an oven unit. The oven unit has a floor heat storage system facing the fireplace and a ceiling heat storage wall facing away from the fireplace. Furthermore, the thermal conductivity of the floor heat storage system differs from that of the ceiling heat storage wall in height.

[0019] Against this background, the invention is based on the objective of designing a cooking device of the type mentioned above in such a way that the most uniform possible heat distribution with regard to the effective top and bottom heat is provided in the oven unit.

[0020] This problem is solved according to the invention with a cooking device according to the features of claim 1.

[0021] Further details of the invention can be found in the dependent claims.

[0022] According to the invention, a cooking device, preferably an external cooking device, is provided, particularly for the heat treatment of food. The cooking device comprises at least two units according to the invention, namely a combustion chamber, preferably arranged at ground level, and an oven unit, preferably arranged vertically above the combustion chamber. According to the invention, the oven unit also comprises a bottom heat storage system facing the combustion chamber and a ceiling heat storage system facing away from the combustion chamber, wherein the thermal conductivity of the bottom heat storage system differs from that of the ceiling heat storage system in height.

[0023] In a preferred embodiment, the thermal conductivity of the ceiling heat storage system is higher than that of the floor heat storage system. This design is particularly suitable when the fireplace is located below the oven unit.

[0024] However, it is also conceivable to design the cooking appliance in which the fireplace is positioned slightly offset laterally and / or vertically from the oven unit. In such designs, it may be necessary for the thermal conductivity of the ceiling heat storage system to be lower than that of the floor heat storage system. The same applies to a design in which the fireplace is positioned vertically above the oven unit.

[0025] Due to the differing thermal conductivity of the bottom and top heat storage elements of the oven unit, the heat input from both the bottom and top of the oven's cooking chamber, and thus the heat and / or temperature distribution, particularly with regard to the top and bottom heat, can be adjusted and controlled very effectively. This makes it possible to compensate for differing temperatures and heat flows at the bottom and top of the oven unit, especially those resulting from the positioning and / or heat transfer from the fireplace, ensuring the most uniform heat input possible into the cooking chamber.The heat flow difference and / or temperature difference that arises across the floor heat storage system and the ceiling heat storage system should preferably be less than ten percent and particularly preferably less than five percent.

[0026] This ensures consistently optimal cooking results. Significantly varying cooking temperatures of foods such as pizzas or cakes prepared in the oven's cooking chamber can thus be effectively avoided.

[0027] Furthermore, a more advantageous design incorporates the ceiling heat storage system as a component of a ceiling wall of the oven unit, facing away from the fireplace and defining part of the oven's cooking chamber. The ceiling heat storage system also includes a corresponding ceiling heat storage element, which, however, is located on the outer surface of the ceiling wall, facing away from the fireplace.

[0028] The oven unit is generally suitable for preparing a wide variety of foods, and in particular for preparing pizzas, cakes, and roasts. For temperature monitoring, the oven unit preferably has an externally visible temperature display. In addition, the oven unit preferably has a light.

[0029] In principle, the cooking device according to the invention can be integrated into a building such as a residential house, and in particular into the kitchen of the house, and thus not be designed separately and independently. Preferably, however, the cooking device is designed separately and has its own housing. The housing can consist at least partially of masonry. In a preferred embodiment, however, the housing is made of metal, in particular stainless steel. In this context, it is possible, on the one hand, for the cooking device to be fixed in place, and on the other hand, it is conceivable that the cooking device has rollers and / or wheels by means of which the cooking device is movable and thus relocatable.

[0030] Furthermore, the differing thermal conductivities of the floor and ceiling heat storage systems can be achieved, for example, by using different thicknesses for the floor and ceiling heat storage systems. The specific thermal conductivities of the floor and ceiling heat storage systems can therefore be the same. However, this would potentially result in significantly different heat capacities for the floor and ceiling heat storage systems. In a preferred design, these should be at least approximately the same to ensure, in particular, uniform heating and / or cooling of the cooking appliance over time.

[0031] According to the invention, the ceiling heat storage system also includes a ceiling heat storage element, in particular made of at least one refractory brick, preferably fireclay, wherein the ceiling heat storage element is arranged on a side of a ceiling wall facing away from the cooking chamber of the oven unit. The ceiling heat storage element has a perforation, i.e., at least one hole or correspondingly at least one through-opening, so that the heat transfer into the cooking chamber of the oven unit can also be influenced and, in particular, increased via the ceiling heat storage element. As with the design of the perforation in the ceiling wall, the heat transfer into the cooking chamber can also be increased by increasing the number and / or diameter of the perforations in the ceiling heat storage element.The hole or holes are preferably formed in the longitudinal direction of the ceiling heat storage element and thus in the plane of the ceiling heat storage element and can, for example, have a circular, a rectangular and / or preferably an oval cross-section.

[0032] In this context, a highly advantageous embodiment of the invention provides that the ceiling wall of the oven unit, which partially delimits the cooking chamber, has a perforation as part of the ceiling heat storage system, i.e., a plurality of spaced-apart holes or corresponding through-openings. This allows the heat transfer into the cooking chamber of the oven unit to be influenced and, in particular, increased. Depending on the design of the combustion chamber, the arrangement of and / or the distances between the combustion chamber and the oven unit, as well as any other units arranged in the cooking device relative to each other, and the dimensions of the oven unit itself, the heat transfer can be effectively influenced by the number and / or diameter of the openings in the perforation.The holes or openings are preferably placed in the ceiling wall perpendicular to the plane of the oven unit's ceiling wall.

[0033] In addition to the option of individually designing the ceiling wall or the ceiling heat storage element with perforations, it is therefore also possible that perforations are incorporated into both the ceiling wall and the ceiling heat storage element.

[0034] The perforations in the ceiling wall can also be filled with a bonding material. This bonding material, preferably a mortar, is also applied between the ceiling wall and the ceiling heat storage element for joining purposes. Introducing the bonding material into the perforations of the ceiling wall and the ceiling heat storage element advantageously prevents the passage of exhaust gas-air mixture generated by the fireplace, through which heat is transferred to the heat storage system, and specifically to the ceiling heat storage system. The bonding material does not, or only minimally, minimize heat transfer into the cooking chamber. Furthermore, the bonding material should be essentially flush with the inner surface of the ceiling wall facing the cooking chamber.

[0035] In a further developed embodiment, at least one insert can be arranged in at least one of the perforations, preferably in the perforation of the ceiling heat storage element. The insert(s) would consist, in particular, of a metal or a ceramic material whose specific thermal conductivity approximates that of a metal. This offers the advantage that a ceiling heat storage system with an insert exhibits a significantly increased thermal conductivity, or specific thermal conductivity, compared to a ceiling heat storage system without an insert.

[0036] According to the invention, the floor heat storage system also comprises a floor wall of the oven unit facing the combustion chamber and defining part of a cooking chamber of the oven unit. In addition to this floor wall, the floor heat storage system preferably also comprises a floor heat storage element, which is arranged on an outer surface of the floor wall facing the combustion chamber. The floor heat storage element would in particular be made of at least one refractory brick, preferably fireclay. Furthermore, according to the invention, a floor heat insulation element, which can also serve as a heat deflector, is arranged on another outer surface of the floor heat storage element facing the combustion chamber. The floor heat insulation element can, for example, be made of concrete or again of fireclay. In addition, the floor heat insulation element can be at least partially enclosed by sheet metal.Furthermore, the floor heat storage element or the floor heat insulation element can have a triangular cross-section, which leads to increased heat reflection and thus minimizes heat transfer within the floor heat storage system. In this way, a combination of floor heat storage and floor heat insulation elements can contribute effectively to achieving the most uniform temperature distribution possible within the oven unit.

[0037] According to the invention, the ceiling heat storage system is further provided that the ceiling heat storage element has thermal insulation on at least one outer surface of the ceiling heat storage element facing away from the cooking chamber of the oven unit. This arrangement minimizes the transfer or flow of heat towards a heat sink, particularly one adjacent to the oven unit. Such a heat sink can be a separate, independently designed external cooking device, e.g., a roof, particularly one that extends vertically, or an adjacent roof area of ​​the external cooking device.

[0038] As the preceding description demonstrates, achieving a pleasing cooking result requires essentially uniform top and bottom heat within the oven's cooking chamber. Lateral heat transfer to the food being cooked generally contributes to a less desirable outcome. This is the case, for example, with cakes, where a higher degree of browning at the edges, especially compared to the center, is highly undesirable. To meet such requirements for the cooking appliance, a promising design involves incorporating at least partial side heat insulation on the outer surface of at least one of the oven's side walls, which faces away from the cooking chamber.A preferred embodiment involves equipping all side walls of the oven unit with at least partial side heat insulation. In principle, the side heat insulation need not completely cover each side wall. The degree of coverage also depends on the design of the fireplace, the arrangement of and / or the distances between the fireplace and the oven unit, as well as between any other units arranged in the cooking device and the dimensions of the oven unit itself, and is individually tailored.

[0039] In a highly practical design, the cooking appliance also features a grill unit positioned between the fireplace and the oven. This allows for both baking and grilling capabilities. The grill unit can be equipped with support elements that allow a grill rack to be stored within the grill unit at least on two levels differing in height from the fireplace, and / or supported on at least one of these levels. Alternatively, at least one grill rack can be permanently attached to the grill unit, thus forming an integral part of it. Even in this case, it remains possible to arrange multiple grill racks, at least two, on levels differing in height from the fireplace.The grill unit and / or each grill grate may also have drip trays and / or drains through which liquids, particularly those released from food during preparation, are removed. This effectively prevents these liquids from entering the firebox. For the same purpose, the grill unit may also include a drip tray.

[0040] In a particularly advantageous embodiment of the invention, the cooking device further comprises a liquid container, in particular a water container, wherein the liquid container is arranged vertically above the oven unit or in a vertical section of the cooking device which overlaps at least partially with a section in which the oven unit is located. This allows, especially when the cooking device is designed as an external cooking device, the possibility of cleaning food, dishes, other utensils, and potentially soiled body parts such as hands. The arrangement in a vertical section of the oven unit or vertically above the oven unit provides optimal heat transfer to the liquid container, so that a liquid stored within the container heats up to a temperature in the range of 30 °C to 40 °C.The container is connected to an outlet fitting, such as a tap, located either inside or on the outside of the cooking device, for the purpose of dispensing the liquid, particularly water. Furthermore, the liquid container would also have an inlet through which the liquid can be supplied to the container.

[0041] To better meet the individual preferences of users of the cooking device according to the invention, a particularly advantageous embodiment is to equip the combustion chamber for burning solid and / or gaseous fuels. For this purpose, the combustion chamber would, on the one hand, have a fuel load over which solid fuels such as wood and / or charcoal can be burned. In addition, the combustion chamber can have a collection container for the burned solid fuel.

[0042] On the other hand, a further development of the invention, advantageous in the aforementioned respect, is described in that the fireplace has a gas burner which is connected to at least one pressure vessel for a fuel gas, which is arranged, in particular, within the cooking device. Such a pressure vessel can, however, also be arranged outside the cooking device. Preferably, the at least one pressure vessel is separated from or contained within an inner wall of the cooking device. Thus, no further safety precautions need to be provided to secure the pressure vessel(s). Although the arrangement of only one pressure vessel is conceivable, in a preferred embodiment, at least two, and particularly preferably only two, pressure vessels are provided to increase the operating time.Each pressure vessel should be designed as a replaceable gas cylinder; however, a fixed arrangement of refillable pressure vessels, particularly within the cooking appliance, is also conceivable. To increase convenience, the gas burner should also be adjustable via a remote control unit.

[0043] The advantageous design of the cooking appliance is further enhanced if at least parts of the units are equipped with or enclosed by a housing that is set back from the outer walls of the cooking appliance, in particular, and forms an exhaust duct. In this way, the cooking appliance units can be separated within the appliance itself. Due to the volume reduction associated with the housing, this minimizes the heat required to heat the units, which must be supplied by the combustion chamber. Furthermore, the heat transfer through the exhaust gas-air mixture generated by the combustion chamber, as well as the exhaust of this mixture, can be optimized.Particularly in the area of ​​the oven unit, the housing forms a double-wall structure with parts of the oven unit, which increases the heat transfer from the exhaust gas-air mixture into the heat storage networks, and especially into the ceiling heat storage network, when the housing is closely guided.

[0044] To improve accessibility to the units, the cooking appliance could be designed such that access openings to all units of the cooking appliance, in particular to the oven unit, the fireplace, and the grill unit, are located on different sides of the cooking appliance. However, this is often not desirable, especially for the fireplace and the grill unit. Therefore, in a practical embodiment of the invention, an access opening for the oven unit is oriented perpendicular to or opposite an access opening for the fireplace and the grill unit of the cooking appliance. This allows for uninterrupted operation and / or use of the oven unit, the fireplace, and the grill unit, since the respective access openings are located on different sides of the cooking appliance. The associated design effort is comparatively low.In this context, it is advantageous if the entire oven unit is arranged in the cooking appliance transversely to the fireplace and / or the grill unit. The aforementioned access openings could also be freely accessible and unlocked at all times, or, in particular, closable by means of doors. The doors, especially a door of the fireplace, could also be designed to be movable via a drive mechanism. Furthermore, it should be possible to initiate the opening or closing of the doors remotely using the drive mechanism.

[0045] With regard to the arrangement of the units within the cooking device, one embodiment of the cooking device according to the invention is particularly promising, in which the cooking device has mounting elements by means of which at least some of the units can be arranged modularly within the cooking device. This would ensure a high degree of flexibility in the arrangement of the units and simplify the implementation of different orientations of the units, especially the oven unit relative to the fireplace and / or the grill unit. The mounting elements could be designed as rails arranged on a base structure of the cooking device.

[0046] A further advantageous embodiment of the cooking device according to the invention lies in the fact that the cooking device has an exhaust gas duct, in particular a chimney, extending from the interior of the cooking device to the outside, on which a closure cover is arranged at the outer end and via which the opening state of the exhaust gas duct can be changed. In this way, the exhaust gas-air mixture produced when the combustion unit is fired with a solid or gaseous fuel can be routed from the interior of the cooking device to the outside in a cost-effectively simple manner. For this purpose, the exhaust gas duct, which runs vertically at least in sections, would be connected to the housing of the units in a fluid-permeable manner. A throttle valve can also be arranged at the transition between the housing and the exhaust gas duct to control the volume flow.The design of the cover prevents objects and / or animals from entering the cooking appliance, particularly when the appliance is not in use and an exhaust vent is closed. To change the opening position, the cover can be axially movable, for example, between two positions.

[0047] The invention allows for various embodiments. To further illustrate its basic principle, several of these are shown in the drawings and described below. The drawings show in Fig. 1. A further development of a cooking device in front view; Fig. 2. A further development of a cooking device in side view; Fig. 3. A further development of a cooking device with access openings arranged transversely to each other; Fig. 4. A further development of a cooking device in perspective view.

[0048] From the Fig. Figure 1 schematically simplifies a further development of the cooking device 1 in a front view. The cooking device 1 is designed here as an outdoor cooking device and, in particular, as an outdoor grill combination.

[0049] The cooking device 1 comprises three units 2, 3, 4: the firebox 2, the grill unit 4, and the oven unit 3, which are arranged vertically one above the other. The grill unit 4 is positioned between the firebox 2 and the oven unit 3 and is further equipped with bearing elements by which the grill rack 29 can be stored in the grill unit 4 at two levels that differ in their height from the firebox 2. In the illustration, the grill rack 29 is shown stored in one of the levels, in this case, the lower one.

[0050] The oven unit 3 also features the bottom heat storage system 5 facing the fireplace 2, which consists of the bottom wall 27 of the oven unit 3, facing the fireplace 2 and delimiting part of the cooking chamber 7 of the oven unit 3, the bottom heat storage element 28 arranged on the outer surface of the bottom wall 27 facing the fireplace 2, and the bottom heat insulation element 36 arranged on the outer surface of the bottom heat storage element 28 facing the fireplace 2. The bottom heat storage element 28 and the bottom heat insulation element 36 are encased in sheet metal. Furthermore, the oven unit 3 features the ceiling heat storage system 6 facing away from the fireplace 2, which comprises the ceiling wall 8 of the oven unit 3, partially delimiting the cooking chamber 7 of the oven unit 3, and the ceiling heat storage element 10.The ceiling heat storage element 10 is arranged on the outer side of the ceiling wall 8 facing away from the cooking chamber 7 of the oven unit 3. To achieve a satisfactory cooking result for foods prepared in the oven unit 3, such as pizza or cake, the thermal conductivity of the bottom heat storage element 5 differs from that of the ceiling heat storage element 6, with the thermal conductivity of the ceiling heat storage element 6 being higher than that of the bottom heat storage element 5. This results in an approximately uniform temperature distribution within the cooking chamber 7. To provide the differing thermal conductivities, the ceiling heat storage element 10, in particular, has perforations 11, which increase the heat transfer into the ceiling heat storage element 6.The perforations 11, consisting of several parallel openings, are formed longitudinally and thus in the plane of the ceiling heat storage element 10. The ceiling heat storage element 10, as well as the entire ceiling heat storage system 6, has a pointed, approximately triangular shape. Furthermore, the floor insulation element 36 has a triangular cross-section to minimize heat transfer to the floor heat storage system 5. This allows the heat differences present during operation of the cooking appliance, and the relatively high temperature differences between the floor heat storage system 5 and the ceiling heat storage system 6, to be balanced. The temperatures in the area of ​​the floor heat storage system 5 are typically in the range of 800 °C to 900 °C, while in the area of ​​the ceiling heat storage system 6 they are only between 350 °C and 400 °C.To connect the ceiling heat storage element 10 to the ceiling wall 8, the ceiling wall 8 also has the perforation 9, which is filled with the connecting material 12 and is shaped perpendicular to the plane of the ceiling wall 8. The connecting material 12 is also installed in a layer between the ceiling heat storage element 10 and the ceiling wall 8. Furthermore, the ceiling heat storage assembly 6 has the ceiling thermal insulation 13 on its outer surface facing away from the cooking chamber 7 of the oven unit 3. This insulation minimizes the transfer or flow of heat towards the roof adjacent to the oven unit 3, which acts as a heat sink, or towards the adjacent roof area of ​​the cooking device 1. In addition to the ceiling thermal insulation 13, side thermal insulation 15 is also installed on the outer surfaces of the side walls 14 that define the cooking chamber 7 of the oven unit 3, facing away from the cooking chamber 7.This side heat insulation 15 minimizes lateral heat input into the cooking chamber 7 of the oven unit 3 and thus into the food being prepared, which generally contributes to an appealing preparation result.

[0051] The heat required for preparing the food is generated via the fireplace 2, from which the heat is transferred to the grill unit 4 and the oven unit 3, primarily by convection and radiation.

[0052] To generate heat, the combustion chamber 2 in this further development of the cooking device 1 is equipped for the combustion of solid and gaseous fuels, for which purpose it has, on the one hand, the fuel feed 23, via which solid fuels such as wood and / or charcoal can be burned. In addition, the combustion chamber 2 has the gas burner 17, which is connected to the Fig. 2 pressure vessels 18, shown in more detail, are connected to a fuel gas.

[0053] The exhaust gas-air mixture produced during the combustion of the solid or gaseous fuel transfers heat by convection to the grill unit 4, which is directly adjacent to the combustion chamber 2, and to the oven unit 3. This heat is then discharged vertically via the enclosure 20, which forms an exhaust duct. The enclosure 20 also separates units 2, 3, and 4 from the outer housing of the cooking device 1 within the cooking device 1. This reduction in volume, provided by the enclosure 20, minimizes the heat required to heat the oven unit 3 and grill unit 4. Furthermore, the heat transfer is optimized by directing the exhaust gas-air mixture generated by the combustion chamber 2 through the enclosure 20.For this purpose, the housing 20 forms a double-wall structure in the area of ​​the oven unit 3 with parts of the oven unit 3, thereby increasing the heat transfer from the exhaust gas-air mixture into the heat storage networks 5, 6 and in particular into the ceiling heat storage network 6.

[0054] To direct the exhaust gas-air mixture to the outside, the housing 20, which acts as an exhaust duct, transitions into the exhaust pipe 25, which extends from the interior of the cooking appliance 1 to the outside, in this case into a chimney. A throttle valve 30 is located at the transition between the housing 20 and the exhaust pipe 25, allowing the volume flow through the exhaust pipe 25 to be controlled. The exhaust pipe 25 also features a closure cover 26 on its outer and end faces, which allows the opening state of the exhaust pipe 25 to be changed.

[0055] The ventilation duct 37, extending from the interior of the cooking chamber 7, also runs into the housing 20 that forms the exhaust duct, through which moisture, in particular, forms in the cooking chamber 7, is discharged. This protects, for example, the seals belonging to the oven unit 3, which may be located, in particular, on a door of the oven unit 3.

[0056] In order to be able to store utensils needed for the preparation of food, such as pizza and / or cake trays, the cooking device 1 also includes a storage compartment 31 in the vertical space below the fireplace 2.

[0057] The Fig. Figure 2 also shows a further development of the cooking device 1 in a cutaway side view. The illustration shows that the gas burner 17 is connected to the pressure vessel 18 for a fuel gas, here a gas cylinder, and that the pressure vessel 18 is separated from the inner wall 19 of the cooking device 1.

[0058] Furthermore, the cooking device 1 includes the liquid container 16, in this case a water tank, which is arranged vertically above the oven unit 3. This causes the heat transferred from the area of ​​the oven unit 3, or rather the area of ​​the upper housing 20, to the liquid container 16 to a temperature of approximately 30 °C to 40 °C for the liquid stored in the liquid container 16, in this case water. For dispensing the heated liquid, the liquid container 16 is also connected to the outlet 32, in this case a tap, via a dispensing line.

[0059] The liquid container 16 and the one in the Fig. The fireplace 2, the grill unit 4, and the oven unit 3 shown in Figure 1 are modularly arranged in the cooking device 1 via the support elements 24. The support elements 24 are designed as rails arranged on a base structure 33 of the cooking device 1. The base structure 33 also generally supports the Fig. 4 removable cladding elements 34, which also form at least part of the housing of the cooking device 1.

[0060] Due to the possibility of modular arrangement, in particular of the oven unit 3 and the grill unit 4 as well as the fireplace 2, the accessibility to these units 2, 3, 4 can be improved by, as shown in the Fig. As can be seen from Figure 3, the access opening 21 of the oven unit 3 is aligned transversely to the access opening 22 of the fireplace 2 and the grill unit 4 of the cooking device 1. This allows for the uninterrupted operation and / or handling of the fireplace 2, the grill unit 4, and the oven unit 3, as the respective access openings are located on different sides of the cooking device 1. This is further detailed in the further development of the Fig. 3 The entire oven unit 3 is arranged in the cooking device 1, aligned transversely to the fireplace 2 and the grill unit 4. This also reveals the design of the perforation 11 in the ceiling heat storage element 10, whereby the openings of the perforation 11 have an oval cross-section.

[0061] In the Fig. Figure 4 further shows a further development of the cooking device 1 in perspective view. Here, in accordance with the design of the Fig. 3, the access opening 21 of the oven unit 3 is aligned transversely to the access opening 22 of the fireplace 2 and the grill unit 4 of the cooking device 1, for which purpose the entire oven unit 3 is arranged transversely to the fireplace 2 and to the grill unit 4 in the cooking device 1. Temperature indicators for monitoring the oven and / or grill temperature of the grill unit 4 are also arranged on the outside of the oven unit 3. Fig.As mentioned previously, Figure 4 also shows the arrangement of the cladding elements 34, which at least partially form the housing of the cooking appliance 1. The width of the cladding elements 34, and thus the lateral dimension of the cooking appliance 1, is slightly less than one meter and preferably lies between 950 and 980 millimeters. The design of the fireplace 2, the oven unit 3, and the grill unit 4 is also shown again. To provide storage space, particularly during food preparation in the cooking appliance 1, the cooking appliance 1 also has two shelves 35 arranged at different heights. The two shelves 35 are partially circumferential, specifically extending around three sides of the cooking appliance 1, and are located on the outside of the cladding elements 34. REFERENCE MARK LIST 1 Cooking device 2 fireplaces 3 Oven unit 4 grill units 5 Ground source heat storage system 6 Ceiling heat storage system 7 Cooking chamber 8 Ceiling wall 9-hole 10 Ceiling heat storage element 11 holes 12 Connecting material 13 Ceiling thermal insulation 14 Side wall 15 Side thermal insulation 16 liquid containers 17 gas burners 18 pressure vessels 19 Interior wall 20 enclosures 21 Access opening 22 Access opening 23 Fuel level 24 bearing element 25 Exhaust pipe 26 Closure cover 27 Floor wall 28 Ground heat storage element 29 Grill grate 30 Throttle valve 31 storage compartment 32 outlet 33 Basic construction 34 Trim element 35 Storage 36 Floor thermal insulation element 37 Ventilation

Claims

[1] Cooking device (1), wherein the cooking device (1) comprises at least two units (2, 3, 4), a fireplace (2) and an oven unit (3), the oven unit (3) comprising a bottom heat storage unit (5) facing the fireplace (2) and a ceiling heat storage unit (6) facing away from the fireplace (2), the latter comprising a ceiling heat storage element (10) having a perforation (11) and ceiling heat insulation (13), wherein the ceiling heat storage element (10) is arranged on an outer surface of a ceiling wall (8) facing away from a cooking chamber (7) of the oven unit (3) and the ceiling heat insulation (13) is arranged on an outer surface of the ceiling heat storage element (10) facing away from the cooking chamber (7) of the oven unit (3),The floor heat storage system (5) facing the fireplace (2) also comprises a floor wall (27) of the oven unit (3) that partially delimits the cooking chamber (7) of the oven unit (3), as well as a floor heat storage element (28) arranged on an outer surface of the floor wall (27) facing the fireplace (2) and a floor heat insulation element (36) arranged on an outer surface of the floor heat storage element (28) again facing the fireplace (2), wherein the thermal conductivity of the floor heat storage system (5) differs in height from the thermal conductivity of the ceiling heat storage system (6). [2] Cooking device (1) according to claim 1, characterized by , that the ceiling wall (8) of the oven unit (3), which partially delimits the cooking chamber (7) of the oven unit (3), has a perforation (9) as a component of the ceiling heat storage system (6). [3] Cooking device (1) according to at least one of the preceding claims, characterized by, that on an outer side facing away from the cooking chamber (7) at least one side wall (14) bordering the cooking chamber (7) of the oven unit (3) at least partially a side heat insulation (15) is provided. [4] Cooking device (1) according to at least one of the preceding claims, characterized by that the cooking device (1) has a grill unit (4) arranged between the fireplace (2) and the oven unit (3). [5] Cooking device (1) according to at least one of the preceding claims, characterized by that the cooking device (1) has a liquid container (16), wherein the liquid container (16) is arranged vertically above the oven unit (3) or in a vertical area of ​​the cooking device (1) which overlaps at least partially with an area in which the oven unit (3) is arranged. [6] Cooking device (1) according to at least one of the preceding claims, characterized by, that the fireplace (2) is designed for the combustion of solid and / or gaseous fuel. [7] Cooking device (1) according to at least one of the preceding claims, characterized by , that the fireplace (2) has a gas burner (17) which is connected to at least one pressure vessel (18) for a fuel gas and the pressure vessel (18) can be stored or is stored separated by an inner wall (19) of the cooking device (1). [8] Cooking device (1) according to at least one of the preceding claims, characterized by , that at least parts of the units (2, 3, 4,) are equipped with or enclosed by a housing (20), wherein the housing (20) forms an exhaust duct. [9] Cooking device (1) according to at least one of the preceding claims, characterized by, that an access opening (21) of the oven unit (3) is aligned transversely to an access opening (22) of the fireplace (2) and / or a grill unit (4) of the cooking device (1). [10] Cooking device (1) according to at least one of the preceding claims, characterized by , that the cooking device (1) has storage elements (24) by means of which at least a part of the units (2, 3, 4) can be arranged modularly in the cooking device (1). [11] Cooking device (1) according to at least one of the preceding claims, characterized by , that the cooking device (1) has an exhaust gas line (25) extending from the interior of the cooking device (1) to the exterior, on which a closure cover (26) is arranged on the outside and at the end, by means of which an opening state of the exhaust gas line (25) can be changed.

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