Heating appliance for preparing, preferably for grilling and / or baking, food.
Patent Information
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- LEU BENNO
- Filing Date
- 2021-08-25
- Publication Date
- 2026-06-03
AI Technical Summary
Existing combustion devices for grilling and cooking are limited in functionality and ease of use, with large central openings compromising the heating surface and requiring complex fuel loading and ash removal processes.
A combustion device with a side access to the firebox for convenient fuel loading and ash removal, featuring a heating disc with adjustable openings and a stone or ceramic plate for versatile cooking and grilling, allowing simultaneous food preparation and heat regulation.
The device provides a multifunctional, easy-to-use solution for grilling, baking, and cooking with improved air circulation and heat control, enabling efficient food preparation and easy ash disposal.
Description
[0001] The invention relates to a combustion device, preferably for grilling, cooking and / or baking food, according to the preamble of claim 1.
[0002] In a well-known device of this type mentioned earlier, a fire plate on the fire bowl has a large opening in the center, so that the heating surface intended for grilling is formed by a ring. This opening also serves to load the firebox with fuel and therefore must be relatively large. Furthermore, the fire base is ellipsoidal in shape and is thus limited to this ring-shaped heating surface for cooking or grilling suitable foods such as meat or vegetables.
[0003] Document WO 2019 / 104274 discloses a firebox for a grill, composed of a number of flints forming the inner perimeter of the firebox. It also features a grate at the bottom and a larger ash container below that. Furthermore, an internal basket with radial and axial bars is provided, which, along with the grate, is removable from the inner cavity of the firebox. Finally, an opening is provided on the side of the firebox for introducing additional fuel.
[0004] In US patent 10,132,502, a grill is disclosed that has a cooking surface on top of a grill pan and a ring-shaped attachment with handles that can be placed on top of it. Fuel openings are arranged along the sides of the cooking surface, and this pan-like support is positioned between them. This removable attachment has a side opening, but not in the grill pan itself.
[0005] The invention is based on the objective of creating a combustion device of the type mentioned above which, with a simple design, is multifunctional for various preparations such as grilling, baking, cooking, etc. and is easy to use.
[0006] This problem is solved according to the invention by the features of claim 1.
[0007] The side access to the firebox allows for convenient loading with the desired amount of fuel, as well as the insertion of pizzas, pastries, and / or other food items, with or without the insertable stone plate. Furthermore, the burning wood or coal can be moved as needed from the outside using a scraper, similar to a pizza oven, and after the fire has gone out, the ash can be completely removed through this side opening.
[0008] In addition, the upper heating disc provides a large grilling area, which is heated with the same fire as in the firebox and allows food to be prepared simultaneously on this heating disc and in the firebox.
[0009] After removing the cover plate placed in an opening in the heating disc, this combustion device can also be used as a cooking appliance for a cooking pot or similar item placed on it.
[0010] With this one or more openings, with or without a cover plate placed on top, the heat generated in the firebox can be changed or controlled.
[0011] The heating disc can also be conveniently provided with an off-center opening for heat regulation, which can be closed with a cover plate.
[0012] A significant advantage is the inclusion of several perforations in the heating element and at least one cover plate, formed by a series of longitudinal slots across specific areas. This results in improved air circulation for the fire in the firebox and allows the food to be grilled with the desired grid pattern on its surface.
[0013] The invention also provides that the plate which can be placed on the base plate is made of stone, such as cordierite or fireclay, and can be inserted from above when the heating disc has been removed.
[0014] It is very advantageous to place a dome-shaped lid on top of the fire bowl, which stands on a base; together, when the lid is in place, they form the outer shape of an antique vase, a goblet, or something similar.
[0015] The invention is explained in more detail below with reference to an exemplary embodiment and the drawing. The drawing shows: Fig. 1 a perspective front view of a combustion device according to the invention with the lid opened; Fig. 2 the combustion device according to Fig. 1 with the lid closed, partially shown in section; Fig. 3 a schematic front view of the combustion unit according to Fig. 1 with the lid closed; Fig. 4 a perspective side view of a variant of a combustion device according to the invention with a cover plate placed on the heating disc; and Fig. 5 a perspective front view of a combustion device according to the invention with the lid opened.
[0016] The combustion unit according to Fig. 1 bis Fig. 3 The fire bowl 1 is equipped with a fire chamber 8 that can be loaded with fuel such as wood, coal and / or similar material. This fire chamber 8 is formed between a base plate 9 arranged in the fire bowl 1 and a heating disc 10 located on its upper edge 7. This heating device is used for preparing food; in particular, it can be used for grilling, cooking, boiling, baking, or the like.
[0017] This heating device consists of a pot-shaped fire bowl 1 with a stable base 2 and a dome-shaped lid 3 with two opposing handles 4 and a chimney opening 5. The lid 3 is hinged to the upper edge 7 of the fire bowl 1 by a hinge 6, and when in place, it forms the outer shape of an antique vase or goblet. The fire bowl 1, the lid 3, as well as the base plate 9 and the heating disc 10 are preferably made of sheet steel.
[0018] The fire bowl 1 preferably has an inwardly tapering conical shape 1" towards the bottom and an approximately cylindrical shape 1' between the base plate 9 and its upper edge 7. This results in an optimal shape for the fire chamber 8 with regard to combustion and the loading of the fuel.
[0019] According to the invention, the fire bowl 1 contains a fire chamber 8 located in its upper half, which is delimited at the bottom by a base plate 9 and at the top by a heating disc 10 for the grilling function. The fire bowl 1 is provided with a lateral recess 11 between the base plate 9 and the upper heating disc 10, through which the fire chamber 8 can be loaded with fuel such as wood, coal, and / or similar material, and through which the burnt material can be removed after cooking. This front-mounted recess 11 is elliptical in shape, with its longer side advantageously oriented horizontally. It also serves to move the burning wood or coal as embers and thus the fire during the baking process. The base plate 9 is preferably arranged at approximately half the height of the fire bowl 1 and can be placed on support elements (not shown) within it or welded or permanently attached to it.
[0020] According to the invention, a plate 12, preferably made of the gemstone cordierite, can be inserted into the base plate 9. This plate optionally performs the baking function of the combustion unit. It is advantageously dimensioned so that, with the heating disc 10 removed, it can be inserted into the fire bowl, which is open at the top and extends to the outer edge 7. The plate 12 has a smaller outer diameter than the base plate 9, creating an annular or similarly shaped gap 8' between the outer surface 12" of the plate and the fire bowl 1. After the fire has been lit, the resulting embers, which are located on the disc-shaped plate 12, can be moved outwards into this gap 8' so that pizzas or similar food items can be placed inside the plate 12 and baked surrounded by the embers.
[0021] For cooking, the heating element 10 has a centrally located opening 13, serving as a fire hole. This opening has a relatively small diameter compared to the overall surface area of the heating element 10 and is covered by a removable cover plate 14. During grilling, this opening 13 is normally covered and can be used as a grilling surface. For cooking, however, it is open, allowing a cooking utensil, such as a pan, saucepan, wok, or similar item, to be placed on it. Otherwise, whether open or closed, it serves to regulate the heat generated in the firebox 8 for baking.
[0022] Advantageously, an additional opening 15 is provided in the heating disc 10, located close to the edge 7. This opening can also be closed with a removable cover plate 16 and is dimensioned such that, when open, it only minimally reduces the available grilling area of the heating disc. This opening 15 serves not only for heat regulation but also for generating an airflow for kindling the fire in the firebox and during the baking of food within it.
[0023] The lateral recess 11 can also be used for heat regulation by opening or closing it. Due to the nearly flat design of the contact surface 12' of the base plate 9 or the plate 12, the heat of the heating disc 10 can be regulated with a glow plug damper, which allows the formation of heat zones on it.
[0024] The heating disc 10 and the cover plates 14, 16 have passage openings, which are preferably formed by a series of longitudinal slots 17, 14', 16' over certain areas 18, 19. According to Fig. 1 These areas 18, 19 are formed on both sides of the heating disc 10 outside the central opening 13 by parallel longitudinal slots 17 running from the inside to the outside. They are spaced apart in such a way that rods are formed between them, by means of which a golden-brown effect, known as a grill grate effect in grilling, is made possible.
[0025] However, they could also be differently shaped openings. For example, any logo could be formed in one of the cover plates.
[0026] By arranging the firebox 8 in the upper half of the fire bowl 1, a sufficiently large insulating chamber 21' is created below the base plate 9. The lid 3 of the fire bowl can be completely removed for grilling. When switching to baking mode, however, it is placed on top, thus covering the fire bowl.
[0027] Fig. 4 shows a variant of a combustion device, which is similar in itself to the one shown after Fig. 1 The design is as follows, and therefore only the differences are shown. It consists of a pot-shaped fire bowl 20, with or without a stand or lid, which are not shown. The fire bowl 20, like the one described above, features... Fig. 1 a conical shape extending downwards and inwards, and an approximately cylindrical shape between an inserted base plate 29 and its upper edge 27. This results in an optimal combustion chamber 28 with regard to combustion and the feeding of the fuel.
[0028] According to the invention, the fire bowl 20 contains a fire chamber 28 located in its upper half, which is delimited at the bottom by the base plate 29 and at the top by a heating disc 22 for the grilling function. Instead of just one recess 11, the fire bowl 20 and the heating disc 22 are provided with corresponding lateral recesses 25, 25'. These recesses 25, 25' are cut out in a segment-like shape. Furthermore, a heat-resistant stone or ceramic can be placed on this base plate 29.
[0029] The heating disc 22 has a centrally located opening 23 serving as a fire hole, onto which a cover plate 24 with longitudinal slots 24' arranged in a row can be placed. Of course, the heating disc 22 can also have longitudinal slots and, if necessary, further openings.
[0030] Fig. 5 shows another variant of a combustion device, which in turn is similar to the one shown after Fig. 1 or Fig. 4 The design is already complete, and therefore only the differences are shown. It consists of a hemispherical fire bowl 30, with or without a stand, and a dome-shaped lid 36 with a handle 34 and a chimney opening 37.
[0031] According to the invention, the fire bowl 30 contains a fire chamber located in its upper half, which is delimited at the bottom by the base plate 39 and at the top by a heating disc 32 for the grilling function. The fire bowl 30 and the heating disc 32 are provided with corresponding lateral recesses 35, 35'. These recesses 35, 35' form a segment shape, and their side edges are curved, although they could also be straight, round, or otherwise shaped. The side edges of the recesses 35, 35' are cut out at the upper end face of the fire bowl 30 and at the outer edge of the heating disc 32.
[0032] These fire bowls 20, 30, as well as the base plates 29, 39 and the heating discs 22, 32, are each advantageously made of sheet steel. Furthermore, a heat-resistant stone or ceramic can be placed on top of this base plate 39. The recesses could also be formed only in the fire bowls 20, 30, as in the embodiment shown in [reference to embodiment]. Fig. 1 .
[0033] The inventive combustion device is easily transportable and is generally set up outdoors as a fire pit. It is characterized by its multifunctionality, offering a large grilling surface and also allowing it to be used as a baking and cooking appliance.
[0034] The invention is sufficiently demonstrated by the embodiment described above. However, it could be further explained by similar variations. For example, this combustion device could have a different outer shape than the one shown, and the base plate could be made of metal, stone, or a composite of these materials. The lid could also be attached without a hinge and, as mentioned, removed for grilling.
[0035] This recess 11 could be round, square or polygonal, trapezoidal, or similarly shaped instead of elliptical. It could also have more than one lateral recess, for example two opposing ones, so that the firebox would be accessible from two sides.
[0036] The heating disc, which can be one or more parts located at the top edge of the fire bowl, can either rest on the upper front of the fire bowl or be positioned against its inner surface, so that its upper grilling surface would be flush with the upper front of the fire bowl. In both cases, the heating disc could preferably be welded to the fire bowl. Alternatively, support elements could be attached to the inside of the fire bowl, upon which the heating disc would rest.
[0037] The heating disc is usually designed as a flat surface in a horizontal orientation. However, instead of being flat, it can also be slightly conical or similarly inclined inwards, so that the oil or similar substances produced during grilling or frying flow inwards into the fire opening of the disc. This opening 15, 23, 33 is located in the center of the heating disc. However, it can also be positioned offset from this center.
Claims
1. Firing device for the preparation, preferably for grilling and / or baking, food products, comprising a fire bowl (1, 20, 30) with a combustion chamber (8, 28), into which combustible material, such as wood, coal and / or the like, can be fed, wherein the fire bowl (1, 20, 30) has at least one lateral recess (11) for feeding in combustible material, characterized in that the combustion chamber (8, 28) is formed between a base plate (9, 29, 39) arranged in the fire bowl (1, 20, 30) and a heating disc (10, 22, 32) located in the upper area, preferably at the upper edge of the fire bowl (1, 20, 30), wherein the lateral recess (11) is provided between the base plate (9, 29, 39) and the upper heating plate (10, 22, 32), through which the burning combustible material can be moved during the baking process, wherein the base plate (9, 29, 39) or a plate (12) which can be placed thereon is made of heat-resistant stone or ceramic for baking food products, such as pizzas, bread or the like, and is formed with a bearing surface (12').
2. Firing device according to claim 1, characterized in that the heating disc (10, 22, 32) in the upper region of the fire bowl (1, 20, 30) is provided with at least one opening (13, 15, 23, 33) and in it in each case a cover plate (14, 16, 24, 31), which can be placed over them for a temperature control of the combustion chamber (8, 28) during firing.
3. Firing device according to claim 1 or 2, characterized in that passage openings in the heating disc (10) and in the at least one cover plate (14, 16) are formed by longitudinal slots (17, 14', 16') arranged in a row over specific areas (18, 19).
4. Firing device according to claim 3, characterized in that instead of the cover plate (14, 16, 24, 31), a cooking utensil, such as a frying pan, a saucepan, a wok or the like, can be fitted into the at least one opening (13, 15, 23, 33).
5. Firing device according to any one of the claims 1 to 4, characterized in that a closure element, for example a door, is associated with the recess (11) at the front of the fire bowl (1), which closure element is preferably closable by means of a hinge or snap-fit into the recess (11).
6. Firing device according to any one of the claims 1 to 5, characterized in that the disc-shaped plate (12), which can be placed on the base plate (9, 29, 39), is made of stone, such as cordierite or fireclay, and can be inserted from above when the heating disc (10, 22, 32) has been removed.
7. Firing device according to any one of the claims 1 to 6, characterized in that the plate (12) is dimensioned with a smaller outer diameter than the base plate (9), so that a ring-shaped or similar space gap (8') is situated between the outer edge (12") of the plate and the fire bowl (1) is formed in order to displace the embers generated during ignition, which are located on the disc-shaped plate (12), outwards into this space gap (8').
8. Firing device according to any one of the claims 1 to 7, characterized in that the base plate (9, 29, 39) is preferably positioned approximately halfway up the fire bowl (1).
9. Firing device according to any one of the claims 1 to 8, characterized in that a dome-shaped lid (3) can be placed on top of the fire bowl (1) standing on a base (2), which together, when the lid is in place, form an external shape similar to an antique vase or a goblet.
10. Firing device according to claim 9, characterized in that a pot-shaped fire bowl (1) preferably has an inwardly tapering conical shape (1'") towards the bottom and an approximately cylindrical shape (1') between the base plate (9) and its upper rim (7).
11. Firing device according to claim 9 or 10, characterized in that the lid (3, 36) is provided with an upper chimney opening (5, 37) and preferably with at least one side handle (4, 34), and is hinged to the fire bowl (1, 30) by means of a hinge (6) for swivelling in and out.
12. Firing device according to any one of the claims 1 to 11, characterized in that the fire bowl (20, 30) and the heating disc (22, 32) are provided with corresponding lateral recesses (25, 25', 35, 35').
13. Firing device according to claim 12, characterized in that these corresponding recesses (25, 25', 35, 35') in the fire bowl (20, 30) and the heating disc (22, 32) form a segment shape and their side edges are cut out in a curved, straight, round or otherwise shaped manner at the upper end face of the fire bowl (20, 30) and at the outer edge of the heating disc (22, 32).
14. Firing device according to any one of the claims 1 to 13, characterized in that the fire bowl (1, 20, 30), the base plate (9, 29, 39) and the heating disc (10, 22, 32) are made of metal, preferably sheet steel.