EP2933564B1 - Portable oven - Google Patents

Description

The present invention relates to a portable oven according to the preamble of claim 1.

Portable stoves are often used in events or festivals where there is no stove or kitchen, or the kitchen is not adequate for purposes such as size, etc.

When temporary stoves are used, they must meet a number of requirements. Such stoves must be easy to assemble and disassemble, but at the same time they must ensure a high stability against overturning and tipping over. In particular, the problem arises in the holder of pans and pans to be heated and the like. This heating can be done via an induction element.

A support structure for pans, tubs and the like, which are heated by induction elements, must meet a number of requirements. The structure must keep the elements to be heated at a predetermined distance, while ensuring high stability, as it must carry pans, tubs and the like, which have a high temperature.

As is known, the induction heating of conductive or ferromagnetic metals is one of the radio frequency heating modes and relies on the generation of heat due to eddy currents generated in the conductor materials when immersed in a radio frequency magnetic field. If the material has ferromagnetic properties, the heating is also generated by magnetic reversal losses.

The patent EP 09 711 562 describes, for example, an induction hotplate in which a circular cooking zone for receiving a pan is provided with four circular choke coils which are symmetrically arranged opposite the center of the cooking area so that the surface occupied by the choke coils is as equal as possible to the cooking area to be heated. These hotplates are large in size and difficult to transport.

Through induction, during heating, when the element to be heated is in direct contact with the induction element, it too can be heated. This may be a heating of the induction element and a subsequent shutdown of the latter, if it exceeds a critical temperature, since the electronics are arranged in the movable and cheap induction elements below the plate of the induction element. Will the Electronics heated, the induction element is turned off. These induction elements with the electronics below the plate are called intro. This elimination is a limited use of the induction heating system. This problem arises in particular in mobile systems, since the electronics can not be spaced far enough.

The present invention has the object to produce a structure that allows the spacing of a to be heated, ferromagnetic element of an induction element. In a preferred embodiment there is at least one second electromagnetic element disposed in the container which is heated to guarantee a more uniform and faster heating of the contents, for example of the oil to be sizzled. This arranged in the second container element can be mounted and disassembled.

It is also an object of the present invention to produce a disassemblable induction plate assembly which spaces all elements / elements to be heated, for example a pan or other container, from the induction element to avoid heat transfer by contact.

The construction according to the invention comprises on the Structure of the induction element or on a Abstellbene stoppable non-magnetic spacers having a seat for receiving a pan or similar and an induction-heated metal pan or the like spaced from the induction element of the kind that between the induction element and the induction-heated element, a space is generated.

In one embodiment, first and second feet are height adjustable and interconnected by a plate. This plate has links which can be coupled at their ends with one foot each. This member may be, for example, a bolt that protrudes from the plate. A foot has a seat where the bolt can be inserted. This seat has an opening through which the bolt is introduced into the seat in a first step. On the side facing away from the opening, a guide is arranged, which guides the bolt in a position situated at 90 degrees with respect to the opening in a second step, preferably in a position above the opening. In a third step, the bolt is then brought into a rest position, which faces away from the position rotated by 90 degrees with respect to the opening. In this way serve two movements in two different directions, preferably deviating by 90 degrees, to the clutch and Uncoupling perform. This movement must be carried out for both clutches and disconnections of the feet with the plate. In a preferred embodiment, the seats of the type are designed such that this movement can take place simultaneously for both feet. This coupling and uncoupling is done twice with two plates, each plate being coupled by at least two feet. The panels have seats where additional panels can be used to make a quadrangular structure. Each plate may also have seats to insert a pan, tub or the like. Once the assembly is completed, it is placed above a device that generates a magnetic field.

In a preferred embodiment, the heatable by induction metal pan is provided on the outside with a heat-insulating panel.

About the described quick assembly and disassembly system, it is possible to perform a quick assembly and disassembly, while ensuring high reliability.

In a further embodiment, the pan is provided with a probe which detects the content of the pan and with a control device of the induction element connected is.

The support structure according to the invention will be described below in a non-limiting manner based on figures of an embodiment.

• Figur 1 einen Tragrahmen einer erfindungsgemäßen beweglichen Küche in einer Explosionsansicht,
• Figur 2 einen der Füße des Tragrahmen von Figur 1 innerhalb des Tragrahmens,
• Figur 3 einen Fuß des Tragrahmen der Figur 1 in einer Innenansicht des Tragrahmens, anliegend an jenem der Figur 2,
• Figur 4 den Fuß der Figur 2 als Schaubild,
• Figur 5 eine Traverse des Tragrahmens der Figur 1 in einer Ansicht von außen des Tragrahmens der Figur 1,
• Figur 6 die Traverse der Figur 5 im Schnitt längs der Schnittlinie VI- VI der Figur 5,
• Figur 7 die Traverse der Figur 5 in Perspektive von innen des Tragrahmen der Figur 1,
• Figur 8 eine Längswand des Tragrahmen der Figur 1 in einer Ansicht von innen des Tragrahmen,
• Figur 9 den Schnitt IX- IX der Figur 8,
• Figur 10 die Wand der Figur 8 in Perspektive von innen des Tragrahmens,
• Figur 11 eine zu erhitzendes Gefäß in Perspektive,
• Figur 12 das Gefäß der Figur 11 in einer Seitenansicht,
• Figur 13 das Gefäß der Figur 11 in einer um 90 Grad gegenüber jenen der Figur 12 gedrehten Seitenansicht, und
• Figur 14 eine weitere Ausführungsform.

In the drawing show:

• FIG. 1 a support frame of a movable kitchen according to the invention in an exploded view,
• FIG. 2 one of the feet of the support frame of FIG. 1 within the supporting frame,
• FIG. 3 one foot of the supporting frame of the FIG. 1 in an interior view of the support frame, adjacent to that of the FIG. 2 .
• FIG. 4 the foot of the FIG. 2 as a graph,
• FIG. 5 a traverse of the supporting frame of FIG. 1 in an outside view of the support frame of the FIG. 1 .
• FIG. 6 the traverse of the FIG. 5 in section along the section line VI-VI of FIG. 5 .
• FIG. 7 the traverse of the FIG. 5 in perspective from inside the supporting frame of the FIG. 1 .
• FIG. 8 a longitudinal wall of the support frame of figure 1 in a view from inside the supporting frame,
• FIG. 9 the section IX-IX of FIG. 8 .
• FIG. 10 the wall of the FIG. 8 in perspective from inside the supporting frame,
• FIG. 11 a vessel to be heated in perspective,
• FIG. 12 the vessel of FIG. 11 in a side view,
• FIG. 13 the vessel of FIG. 11 in a 90 degrees compared to those of FIG. 12 turned side view, and
• FIG. 14 another embodiment.

In the figures, reference numeral 1 indicates a total of a support structure or a support frame for portable stoves, which are intended primarily for catering services. For such services, preferably food-receiving pans or generally vessels 2 (Figures 11 to 13) are heated by an induction current source. It is therefore generally to cooking areas, which must be spaced from the bottom of the vessel to be heated.

The support frame 1 consists of two longitudinal walls 3 and 4 and two transverse walls 5 and 6. Die Transverse walls 5 and 6 are respectively connected to box-shaped feet 7 and 8 or 9 and 10. Each foot 7, 8, 9 and 10 is provided with a height-adjustable support 11.

Each foot 7, 8, 9 and 10 has an end wall 12 (FIG. Figure 2-4 ), from which an angular guide 13 and a quarter-circle-shaped guide 14 except the ends of which pass into rectilinear guides 15 and 16, which are perpendicular to each other and at a distance from the corner of the angular guide 13 ends, where the flanks 17 and 18 of the angular Guide 13 of the kind converge that the rectilinear guides 15 and 17 are aligned with each other in the transverse direction of the support frame 1 and the guides 16 and 18 in the vertical direction or perpendicular to the alignment of the rectilinear guides 15 and 17.

The guide 13 receives a bolt 20 and the guide 14 on a bolt 19 projecting from the transverse walls 5 and 6 and each have a first distance corresponding to the distance between the ends of the linear guide 16 and the linear guide 18, during the Distance between the ends of the rectilinear guides 15 and 17 is equal to the first distance dimensioned.

Each foot 7, 8, 9 and 10 can thus from a position in which the bolts 19 and 20 with the respective ends of the guides 16 and 18, that are perpendicular, are in contact, are brought into a position in which the bolts 19 and 20 with the respective ends of the guides 15 and 17, that is horizontally in contact. It is clear that the radius of curvature of the quarter circle 14 in its center of the Eckpuntes the angular guide always corresponds to the distance between the bolts 19 and 20. If, in this manner, the feet 7, 8, 9 and 10 are brought into alignment with the transverse walls 5 and 6, respectively, they are no longer expanded in their height but are contained within the outer dimensions of the respective transverse walls.

As in FIGS. 5 and 7 shown, each transverse wall 5 or 6 upper passages 21, in the present case two, and lower passages 22, which are dimensioned and intended for the hooking of lower and upper lugs 23 and 24, from the free ends of the longitudinal walls 3 and 4 are excluded. Thus, the longitudinal walls 3 and 4 can be stably connected to the transverse walls 5 and 6 to form the support frame 1.

In this embodiment, the transverse walls 5 and 6 at the top center and side notches 25 and 26, which form seats for bolts 27 which project from mutually parallel walls of the vessel 2. It is clear that the vessel 2 with the support frame 1 must be detachable to its bolt 27 with the notches 25th to engage in order to couple the vessel 2 with the support frame 1, the vessel 2 is provided with handles 28 on mutually parallel walls of the type that a convenient transport of the vessel itself is ensured.

The transverse and longitudinal walls finally have bottom slats 29 and 30 for supporting the bottom of the vessels 2.

In a second embodiment, a construction 200 according to the invention comprises four height-adjustable legs connected to a support frame, which nevertheless has four walls 202 which form a rectangular structure and are connected to each other by wires 201 having a seat with the rectangular structure form a pan or pan.

In a preferred variant, both in the first embodiment and in the second embodiment, a second magnetic metal element may be provided, which is arranged in the pan or the like such that this second element is also heated by induction.

This second element may, for example, be a net, and also have the function of being removed from the pan or the like, whereby the food may also be taken, for example, from potatoes placed in the oil. This second heating element allows the oil as quickly as possible to bring the temperature for frying as uniformly as possible.

In the drawings, the induction element has never been shown because it can be manufactured in a known and different manner.

Claims (10)

1. Mobile cooker comprising one or more induction hotplates, one or more magnetic metal containers destined to house food to be cooked via the induction source inducing heat into the metal container and a support frame adapted to support one or more containers on the induction hotplate(s), characterised in that the support frame (1, 200) thermally isolates the container(s) with respect to the induction hotplate.
2. Mobile cooker according to claim 1, characterised in that within the container at least a second magnetic metal element is arranged.
3. Mobile cooker according to claim 2, characterised in that said second element has a mesh structure.
4. Mobile cooker according to claim 1, characterised in that each foot (7, 8, 9 and 10) is box-shaped and has a front wall (12) (Figures 2-4) in which an angular guide (13) and a quarter-circular guide (14) are envisaged, whose ends are respectively connected to rectilinear guides (15 and 16) perpendicular to one another and ending at a distance from the angular guide (13) vertex into which its sides (17 and 18) converge such that the rectilinear guides (15 and 17) are aligned with one another transversally across the frame (1) and the guides (16 and 18) are aligned with one another vertically or perpendicularly with respect to the alignment of the rectilinear guides (15 and 17), the angular guide (13) being adapted to receive a pin (20) and the circle arc shaped guide (14) a pin (19) which project from the transversal walls (5 and 6) and have a first distance between them corresponding to the distance between the ends of the rectilinear guide (16) and the rectilinear guide (18), while the distance between the ends of the rectilinear guides (15, 17) is the same length as said first distance, each foot (7, 8, 9 and 10) being able to be brought from one position in which the pins (19 and 20) are in contact with the respective ends of the rectilinear guides (16 and 18), that is vertically, to a position in which the pins (19 and 20) are in contact with the respective end of the guide (15 and 17), that is horizontally, the curve radius of the quarter-circle(14) having its centre in the vertex of the angular guide (13) and corresponding to the distance between the two pins (19 and 20), supporting the feet (7, 8, 9 and 10) in alignment with the transversal walls (5 and respectively 6); they are not longer than their height, but are contained within the overall dimension of the respective transversal walls.
5. Mobile cooker according to the previous claims, characterised in that each transversal wall (5 and 6 respectively) has upper passages (21) and lower passages (22) sized and intended for hooking upper and lower projections (23 and 24) obtained by the free longitudinal ends of the longitudinal walls (3 and 4), in order to firmly connect the longitudinal walls (3 and 4) with the transversal walls (5 and 6) to form the support frame (1).
6. Mobile cooker according to the previous claims, characterised in that the transversal walls (5 and 6) have in the upper part recesses (25, 26) forming housings for pins (27) projecting from the walls of the container (2) parallel to each other.
7. Mobile cooker according to the previous claims, characterised in that the container (2) is equipped with handles (28) on two walls parallel to each other.
8. Mobile cooker according to the previous claims, characterised in that the transversal and longitudinal walls have lower thin plates (29 and 30 respectively) to support the bottom of container (2).
9. Mobile cooker according to the previous claims, characterised in that the metal container (2) with induction heatable is externally provided with a thermally insulating coating.
10. Mobile cooker according to the previous claims, characterised in that the metal container (2) presents a probe that recognise the contents of the container (2) and is connected with a control device of the induction element.

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