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EP1704937B1 - Cooking vessel and method for manufacturing the same - Google Patents

Cooking vessel and method for manufacturing the same Download PDF

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Publication number
EP1704937B1
EP1704937B1 EP05006319A EP05006319A EP1704937B1 EP 1704937 B1 EP1704937 B1 EP 1704937B1 EP 05006319 A EP05006319 A EP 05006319A EP 05006319 A EP05006319 A EP 05006319A EP 1704937 B1 EP1704937 B1 EP 1704937B1
Authority
EP
European Patent Office
Prior art keywords
induction
base
cookware
induction element
ferromagnetic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP05006319A
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German (de)
French (fr)
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EP1704937A1 (en
Inventor
Gerd Kloppsteck
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heinrich Berndes GmbH and Co KG
Original Assignee
Heinrich Berndes GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Heinrich Berndes GmbH and Co KG filed Critical Heinrich Berndes GmbH and Co KG
Priority to AT05006319T priority Critical patent/ATE435079T1/en
Priority to EP05006319A priority patent/EP1704937B1/en
Priority to DE502005007613T priority patent/DE502005007613D1/en
Publication of EP1704937A1 publication Critical patent/EP1704937A1/en
Application granted granted Critical
Publication of EP1704937B1 publication Critical patent/EP1704937B1/en
Anticipated expiration legal-status Critical
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/18—Making hollow objects characterised by the use of the objects vessels, e.g. tubs, vats, tanks, sinks, or the like
    • B21D51/22—Making hollow objects characterised by the use of the objects vessels, e.g. tubs, vats, tanks, sinks, or the like pots, e.g. for cooking

Definitions

  • the present invention relates to a cookware according to the preamble of claim 1. Furthermore, the present invention relates to a method for producing a cookware.
  • Cookware of the type mentioned are already known from the prior art in various variants and embodiments.
  • a basic prerequisite for a cookware to be used on an induction hob of an induction cooker and heated by induction is that at least partially a ferromagnetic material must be present on a lower side of the cookware.
  • a high-frequency alternating magnetic field is generated by an induction hob, in which a coil is arranged, which induces eddy currents in the bottom of the induction-suitable cookware, which heat energy is released in a known manner.
  • a ferromagnetic base is attached in a flat manner to an underside of the cooking utensil otherwise not intended for induction heating.
  • the ferromagnetic induction bottom can dissolve from the cookware, so that the cookware is unusable, at least for use on an induction hob.
  • the EP 0 688 526 A1 discloses a cup-shaped cooking appliance with a container bottom, to which a circuit board of good conductive metallic material and a circuit board cover are attached. In the bottom of the board cover a plurality of recesses are formed, in each of which a filler made of ferromagnetic steel sheet is fitted. Overall, the cooking appliance and in particular the board with the board cover is relatively expensive.
  • the object of the present invention is to provide a cookware of the type mentioned above that is suitable for induction cookers and that has a longer service life than the cooking utensils previously known from the prior art.
  • Another object of the present invention is to provide a method by which an induction-capable cookware can be manufactured easily and inexpensively.
  • the object is achieved by a cookware of the type mentioned above with the characterizing features of claim 1.
  • the base of the main body has at least one opening which penetrates the ground and into which the at least one ferromagnetic induction element is inserted.
  • the at least one induction element which in turn can penetrate the soil after insertion into its associated opening, causes the cookware, whose base body is made of a non-induction hearthable material, can also be used on an induction hob of an induction cooker.
  • the thickness of the at least one induction element preferably corresponds at least in sections substantially to the thickness of the base of the base body.
  • the at least one induction element is aligned with the portions of the bottom, the at least one Limit opening for receiving the at least one induction element laterally.
  • the induction element can be aligned on the outside and / or on the inside of the cookware with the adjacent portions of the floor.
  • the cookware comprises a plurality of ferromagnetic induction elements, wherein each of the induction elements is inserted into an associated opening of the soil.
  • the ferromagnetic induction elements are arranged concentrically in the bottom of the base body. It has been found that with the concentric arrangement of the induction elements around a common center of the floor, the efficiency of heat generation can be improved.
  • ferromagnetic induction elements can be provided in an advantageous embodiment that extend the ferromagnetic induction elements from a common center of the bottom radially outward. If, for example, substantially nub-like shaped induction elements are used, they can be arranged substantially star-shaped with respect to a common center.
  • the ferromagnetic induction element has on a lower side a plurality of induction segments, which are inserted in at least one opening of the base assigned to them.
  • the induction segments extend from a common center radially outward.
  • the induction segments can be arranged concentrically on the underside of the induction element.
  • the induction segments are formed integrally with the induction element.
  • the induction element can thus be formed as a substantially plate-shaped element, on the underside of the induction segments are formed. This substantially plate-shaped induction element can be relatively easily inserted from the inside into the openings of the soil. Thus, for example, thermal stresses that can occur due to different thermal expansion coefficients of the materials can be avoided. If the induction element is pressed under high pressure into the openings of the bottom, a cohesive material connection can be produced by friction welding.
  • the bottom of the body has a circumferential recess on which the induction element rests at least in sections.
  • the base body is made of a non-ferritic metal, in particular of aluminum or cast aluminum.
  • the base body is made of a non-metallic material, in particular of plastic, glass or ceramic.
  • a material connection is produced between the at least one induction element and the sections of the floor which laterally delimit the at least one opening.
  • the at least one induction element is pressed into the at least one opening of the bottom. If the at least one induction element is pressed under high pressure into the at least one opening of the base, a cohesive connection between the at least one induction element and the areas of the base of the base body can be generated by friction welding, which laterally surrounds the at least one opening of the base limit.
  • a base body is produced with a plurality of openings which penetrate the floor and into which an induction element is inserted in each case. It has been shown that it is advantageous for a particularly high efficiency in the heat generation, if at least about 60 percent of the available on a bottom of the cookware contact surface is filled by the induction elements.
  • a base body is produced with a plurality of openings which penetrate the bottom and into which at least one induction segment, which is arranged on a lower side of the induction element, is inserted. Also in this way can be achieved that about 60 percent of the total area of the underside of the cookware have a ferromagnetic material.
  • the induction element may also have a plurality of induction segments on its underside.
  • Fig. 1 Reference is made, in which a longitudinal section through a cookware 1 according to an embodiment is shown in which not all the features belonging to the invention are realized.
  • the cookware 1 shown in this first embodiment is a saucepan. Basically, the cookware 1, for example, a pan or the like.
  • the cookware 1 comprises a main body 2 which is made of a material which is not suitable for heating by an induction hob of an induction cooker. This means that the base body 2 of the cookware 1 on the induction hob of an induction cooker during its operation can not be heated directly.
  • the base body 2 may be made of a metallic material such as aluminum, cast aluminum or an aluminum alloy, copper or a copper alloy.
  • the main body 2 can according to a variant also be made of a non-metallic material such as glass, ceramic or plastic.
  • the base body 2 laterally delimits an interior 3, which can receive the food during use of the cookware 1.
  • the base body 2 has a bottom 4, which comprises a plurality of openings (not provided with reference numerals).
  • the openings completely penetrate the bottom 4 of the main body 2 and, with respect to their size and shape, are suitable for respectively receiving a correspondingly shaped induction element 5 made of a ferromagnetic material.
  • the cookware 1 a total of six separate induction elements 5, which are each received in an associated opening in the bottom 4 of the base body 2. It can be seen that the induction elements 5 are arranged concentrically around a center of the bottom 4 in this embodiment and extend radially outward from this center.
  • Each of the induction elements 5 is, as already mentioned above, made of a ferromagnetic material, so that the induction elements 5 can heat up during the operation of the cooking vessel 1 on an induction hob of an induction cooker.
  • the induction elements 5 may be made of steel, cast steel or chrome steel.
  • the induction elements 5 can also be made of other ferromagnetic materials such as Example be made of nickel or ferromagnetic alloys.
  • the main body 2 is first produced with the corresponding openings in the bottom 4, in each of which one of the induction elements 5 is subsequently used.
  • the induction elements 5 can be used in this embodiment of the cookware 1 either from below or from above (that is, from the interior 3) in the openings provided for the bottom 4 of the base body 2
  • each of the induction elements 5 can be pressed under high pressure into its associated opening, so that by friction welding a cohesive connection between the induction elements 5 and the portions of the bottom 4, which laterally delimit the respective openings for the induction elements 5, can be produced ,
  • the induction elements 5 can also be inserted into the corresponding openings in the base 4 and then fixed by soldering or an alternative cohesive joining process.
  • the ferromagnetic induction elements 5 can be designed as a solid body or as a hollow body. It has been found that an embodiment of the induction elements 5 as a hollow body can be advantageous in particular when the induction elements 5 are pressed into the openings of the bottom 4 and a cohesive material connection is produced by friction welding.
  • the induction elements 5 in this exemplary embodiment are aligned both on an inner side which faces the inner space 3 and on an outer side with the areas of the base 4 of the base body 2 which are directly adjacent to the induction elements 5. This ensures in particular that the underside of the cooking vessel 1 is substantially planar.
  • the adjacent to the interior 3 of the cooking vessel 1 surface of the induction elements 5 is sealed with a suitable coating.
  • all the induction elements 5 are made of the same material, thus on the underside of the cookware 1 at the positions at which the induction elements 5 are provided , comparable thermal conditions prevail. It can also be provided according to a variant, that the induction elements 5 are made of different ferromagnetic materials.
  • the induction elements 5 can also be configured substantially knob-like.
  • a longitudinal section through a cookware 1 according to one embodiment of the present invention is shown.
  • the cookware 1 is again a saucepan.
  • the cookware 1 according to this embodiment may be, for example, a pan or the like.
  • the main body 2 is made as in the first embodiment of a non-induction cooker suitable material, which is therefore not suitable for induction heating on an induction hob.
  • the base body 2 may be made of a metallic material such as aluminum, cast aluminum or an aluminum alloy, copper or a copper alloy.
  • the main body 2 may alternatively be made of non-metallic materials such as glass, ceramic or plastic.
  • the base 4 of the base body 2 comprises a substantially annular depression 40, on which an edge region of the ferromagnetic induction element 5 rests in sections.
  • the induction element 5 is in alignment with the sections of the bottom 4 immediately adjacent thereto.
  • Fig. 4 is a plan view of the cookware according to Fig. 3 shown.
  • the induction element 5 comprises on a bottom side a total of six induction segments 50 which extend outward from a common center point.
  • the geometric shape of the induction segments 50 can be chosen arbitrarily in principle. It can be provided, for example, that a plurality of substantially knob-like shaped induction segments is used, which can be arranged concentrically on the underside of the induction element 5 and can extend radially outwardly from the center of the induction element 5.
  • knob-like segments may have different diameters. For example, if relatively small knob-like induction segments are used with a relatively small diameter, a relatively large number of openings in the bottom 4 of the base body 2 must be made available, in which the knob-like induction segments can each engage.
  • the induction element 5 with the induction segments 50 on its underside is made of a ferromagnetic material.
  • the ferromagnetic materials mentioned in the first embodiment can be used. It is advantageous that both the induction element 5 and the induction segments 50 are made of the same ferromagnetic material in order to avoid thermal stresses that may occur due to different thermal expansion coefficients, if possible. In principle, however, the induction element 5 and the induction segments 50 can also be made of different ferromagnetic materials.
  • the induction element 5 with the induction segments 50 can be pressed in the manufacture of the cookware 1 again under high pressure in the correspondingly provided openings of the bottom 4 of the base body 2, which receive the induction segments 50 of the induction element 5.
  • a cohesive material connection can be made.
  • the induction element 5 is not, as known from the prior art, attached from the outside to an underside of the bottom, but from the interior 3 into the corresponding cut openings of the bottom 4 of the base body second used. This leads to an increased stability of the entire arrangement and prevents the induction element 5 from becoming detached from the base 4 of the base body 2 during prolonged operation, for example due to thermal stresses.
  • the induction element 5 can also be attached in the base 4 of the base body 2 with the aid of other joining methods known from the prior art, in particular by soldering.
  • the main body 2 is first again generated together with the corresponding openings in the bottom 4, which are to receive the induction element 5 with the induction segments 50 on the underside of a non-induction cooker suitable material. Subsequently, the induction element 5 is pressed together with the induction segments 50 under high pressure in the openings provided for the bottom 4. Due to the heat generated thereby by friction between the areas of the bottom 4, which laterally delimit the openings and the induction segments 50 and the base plate 5 is in turn made by friction welding a cohesive ge connection between the materials.
  • the induction element 5 and the induction segments 50 can also be designed in this embodiment as a solid body or as a hollow body.
  • substantially knob-like shaped induction segments 50 can be used, which can be arranged concentrically on the underside of the induction element and can extend radially outwardly from the center.
  • the induction segments 50 should occupy at least about 60% of the total available area on the underside of the cookware 1 in order to achieve sufficient efficiency in heat generation.
  • the adjacent to the interior 3 of the cooking vessel 1 surface of the induction element 5 is sealed with a suitable coating.
  • An advantage of the advantageous embodiment of the present invention presented here is that the cookware 1 can be used on an induction hob of an induction cooker without distortions and tensions during operation to such an extent that the cookware 1 becomes unusable in the longer term.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cookers (AREA)

Abstract

The vessel has a base (2) which is made of a material which is not suitable for inductive cookers. Part (4) of the base is covered with ferrousmagnetic induction element (5). The base has an opening, which penetrates the base part where the ferrousmagnetic induction element is provided. The induction elements are provided in the opening of the base. The ferrousmagnetic induction elements are concentrically arranged in the base part. An independent claim is included for a method for the production of a cooking vessel.

Description

Die vorliegende Erfindung betrifft ein Kochgeschirr nach dem Oberbegriff des Anspruchs 1. Darüber hinaus betrifft die vorliegende Erfindung ein Verfahren zur Herstellung eines Kochgeschirrs.The present invention relates to a cookware according to the preamble of claim 1. Furthermore, the present invention relates to a method for producing a cookware.

Kochgeschirre der eingangs genannten Art sind aus dem Stand der Technik in verschiedenen Varianten und Ausführungsformen bereits bekannt. Eine Grundvoraussetzung dafür, dass ein Kochgeschirr auch auf einem Induktionskochfeld eines Induktionsherds eingesetzt und durch Induktion erwärmt werden kann, besteht darin, dass vorzugsweise auf einer Unterseite des Kochgeschirrs mindestens abschnittsweise ein ferromagnetisches Material vorhanden sein muss.Cookware of the type mentioned are already known from the prior art in various variants and embodiments. A basic prerequisite for a cookware to be used on an induction hob of an induction cooker and heated by induction is that at least partially a ferromagnetic material must be present on a lower side of the cookware.

Bei einem Induktionsherd wird von einem Induktionskochfeld, in dem eine Spule angeordnet ist, ein hochfrequentes magnetisches Wechselfeld erzeugt, das im Boden des induktionsgeeigneten Kochgeschirrs Wirbelströme induziert, die in bekannter Weise Wärmeenergie freisetzen. Häufig wird bei den aus dem Stand der Technik bekannten Kochgeschirren einfach ein ferromagnetischer Boden flächig an einer Unterseite des ansonsten nicht für Induktionsheizen vorgesehenen Kochgeschirrs angebracht. Es hat sich allerdings gezeigt, dass bei einem derartigen Kochgeschirr während des Betriebs Verwindungen auftreten können, so dass sich insbesondere bei einem längeren Gebrauch der ferromagnetische Induktionsboden vom Kochgeschirr lösen kann, so dass das Kochgeschirr zumindest für die Verwendung auf einem Induktionskochfeld unbrauchbar wird.In an induction cooker, a high-frequency alternating magnetic field is generated by an induction hob, in which a coil is arranged, which induces eddy currents in the bottom of the induction-suitable cookware, which heat energy is released in a known manner. Often, in the cooking utensils known from the prior art, simply a ferromagnetic base is attached in a flat manner to an underside of the cooking utensil otherwise not intended for induction heating. However, it has been shown that in such a cookware twists can occur during operation, so that in particular with a longer use, the ferromagnetic induction bottom can dissolve from the cookware, so that the cookware is unusable, at least for use on an induction hob.

Aus der EP 0 648 458 A1 ist ein Kochgeschirr mit einer Aluminiumbodenplatte bekannt, wobei im Boden eine Ringnut ausgebildet ist, in die ein Ring aus ferromagnetischen Material eingelassen ist. Neben der Möglichkeit, das Kochgeschirr auch auf einem Induktionskochfeld zu erwärmen, soll der Ring auch der Stabilisierung der relativ weichen Bodenplatte dienen.From the EP 0 648 458 A1 a cookware with an aluminum bottom plate is known, wherein in the bottom an annular groove is formed, into which a ring of ferromagnetic material is embedded. In addition to the possibility to heat the cookware on an induction hob, the ring should also serve to stabilize the relatively soft bottom plate.

Die EP 0 688 526 A1 offenbart ein topfförmiges Kochgerät mit einem Behälterboden, an dem eine Platine aus gut leitendem metallischen Werkstoff und eine Platinenabdeckung befestigt sind. In dem Boden der Platinenabdeckung sind eine Mehrzahl von Ausnehmungen ausgebildet, in denen jeweils ein Füllstück aus ferromagnetischen Stahlblech eingepaßt ist. Insgesamt ist das Kochgerät und insbesondere die Platine mit der Platinenabdeckung relativ aufwendig aufgebaut.The EP 0 688 526 A1 discloses a cup-shaped cooking appliance with a container bottom, to which a circuit board of good conductive metallic material and a circuit board cover are attached. In the bottom of the board cover a plurality of recesses are formed, in each of which a filler made of ferromagnetic steel sheet is fitted. Overall, the cooking appliance and in particular the board with the board cover is relatively expensive.

Die vorliegende Erfindung macht es sich zur Aufgabe, ein kostengünstig herstellbares Kochgeschirr der eingangs genannten Art zur Verfügung zu stellen, welches für Induktionsherde geeignet ist und das eine längere Lebensdauer aufweist als die aus dem Stand der Technik vorbekannten Kochgeschirre. Eine weitere Aufgabe der vorliegenden Erfindung besteht darin, ein Verfahren anzugeben, mit dem ein induktionstaugliches Kochgeschirr einfach und kostengünstig hergestellt werden kann.The object of the present invention is to provide a cookware of the type mentioned above that is suitable for induction cookers and that has a longer service life than the cooking utensils previously known from the prior art. Another object of the present invention is to provide a method by which an induction-capable cookware can be manufactured easily and inexpensively.

Hinsichtlich des Kochgeschirrs wird die Aufgabe durch ein Kochgeschirr der eingangs genannten Art mit den kennzeichnenden Merkmalen des Anspruchs 1 gelöst. Erfindungsgemäß wird vorgeschlagen, dass der Boden des Grundkörpers mindestens eine Öffnung aufweist, die den Boden durchdringt und in die das mindestens eine ferromagnetische Induktionselement eingesetzt ist. Das mindestens eine Induktionselement, das seinerseits nach dem Einsetzen in die ihm zugeordnete Öffnung den Boden durchdringen kann, bewirkt, dass das Kochgeschirr, dessen Grundkörper aus einem nicht-induktionsherdtauglichen Material hergestellt ist, auch auf einem Induktionskochfeld eines Induktionsherds eingesetzt werden kann. Vorzugsweise entspricht somit die Dicke des mindestens einen Induktionselements mindestens abschnittsweise im Wesentlichen der Dicke des Bodens des Grundkörpers. Vorzugsweise fluchtet das mindestens eine Induktionselement mit den Abschnitten des Bodens, die die mindestens eine Öffnung zur Aufnahme des mindestens einen Induktionselements seitlich begrenzen. Das Induktionselement kann auf der Außenseite und/oder auf der Innenseite des Kochgeschirrs mit den benachbarten Abschnitten des Bodens fluchten.With regard to the cookware, the object is achieved by a cookware of the type mentioned above with the characterizing features of claim 1. According to the invention, it is proposed that the base of the main body has at least one opening which penetrates the ground and into which the at least one ferromagnetic induction element is inserted. The at least one induction element, which in turn can penetrate the soil after insertion into its associated opening, causes the cookware, whose base body is made of a non-induction hearthable material, can also be used on an induction hob of an induction cooker. Thus, the thickness of the at least one induction element preferably corresponds at least in sections substantially to the thickness of the base of the base body. Preferably, the at least one induction element is aligned with the portions of the bottom, the at least one Limit opening for receiving the at least one induction element laterally. The induction element can be aligned on the outside and / or on the inside of the cookware with the adjacent portions of the floor.

Um die Effizienz bei der Wärmeerzeugung auf dem Induktionskochfeld zu verbessern und gleichzeitig Verwindungen möglichst vermeiden zu können, wird gemäß einer bevorzugten Ausführungsform vorgeschlagen, dass das Kochgeschirr eine Mehrzahl ferromagnetischer Induktionselemente aufweist, wobei jedes der Induktionselemente in eine diesem zugeordnete Öffnung des Bodens eingesetzt ist. Jede der Öffnungen, in die bei der Herstellung des Kochgeschirrs ein Induktionselement eingesetzt wird, durchdringt dabei wiederum den Boden des Grundkörpers.In order to improve the efficiency of the heat generation on the induction hob and at the same time to avoid twisting as possible, it is proposed according to a preferred embodiment, that the cookware comprises a plurality of ferromagnetic induction elements, wherein each of the induction elements is inserted into an associated opening of the soil. Each of the openings, in which an induction element is used in the production of the cookware, in turn penetrates the bottom of the body.

Vorzugsweise sind die ferromagnetischen Induktionselemente konzentrisch im Boden des Grundkörpers angeordnet. Es hat sich gezeigt, dass mit der konzentrischen Anordnung der Induktionselemente um einen gemeinsamen Mittelpunkt des Bodens die Effizienz bei der Wärmeerzeugung verbessert werden kann.Preferably, the ferromagnetic induction elements are arranged concentrically in the bottom of the base body. It has been found that with the concentric arrangement of the induction elements around a common center of the floor, the efficiency of heat generation can be improved.

Es kann in einer vorteilhaften Ausführungsform vorgesehen sein, dass sich die ferromagnetischen Induktionselemente von einem gemeinsamen Mittelpunkt des Bodens radial nach außen erstrecken. Werden zum Beispiel im Wesentlichen noppenartig geformte Induktionselemente eingesetzt, können diese im Wesentlichen sternförmig bezüglich eines gemeinsamen Mittelpunkts angeordnet sein.It can be provided in an advantageous embodiment that extend the ferromagnetic induction elements from a common center of the bottom radially outward. If, for example, substantially nub-like shaped induction elements are used, they can be arranged substantially star-shaped with respect to a common center.

In einer besonders vorteilhaften Ausführungsform wird vorgeschlagen, dass das ferromagnetische Induktionselement an einer Unterseite eine Mehrzahl von Induktionssegmenten aufweist, die in mindestens einer ihnen zugeordneten Öffnung des Bodens eingesetzt sind.In a particularly advantageous embodiment, it is proposed that the ferromagnetic induction element has on a lower side a plurality of induction segments, which are inserted in at least one opening of the base assigned to them.

Es kann in einer bevorzugten Ausführungsform vorgesehen sein, dass sich die Induktionssegmente von einem gemeinsamen Mittelpunkt radial nach außen erstrecken.It may be provided in a preferred embodiment that the induction segments extend from a common center radially outward.

Vorzugsweise können die Induktionssegmente konzentrisch auf der Unterseite des Induktionselements angeordnet sein.Preferably, the induction segments can be arranged concentrically on the underside of the induction element.

In einer besonders vorteilhaften Ausführungsform sind die Induktionssegmente integral mit dem Induktionselement ausgebildet. Das Induktionselement kann somit als ein im Wesentlichen plattenförmiges Element ausgebildet sein, an dessen Unterseite die Induktionssegmente ausgebildet sind. Dieses im Wesentlichen plattenförmige Induktionselement kann relativ einfach von innen in die Öffnungen des Bodens eingesetzt werden. Damit können zum Beispiel auch thermische Spannungen, die aufgrund unterschiedlicher thermischer Ausdehnungskoeffizienten der Materialien auftreten können, vermieden werden. Wird das Induktionselement unter hohem Druck in die Öffnungen des Bodens eingepresst, kann durch Reibschweißen eine stoffschlüssige Materialverbindung hergestellt werden.In a particularly advantageous embodiment, the induction segments are formed integrally with the induction element. The induction element can thus be formed as a substantially plate-shaped element, on the underside of the induction segments are formed. This substantially plate-shaped induction element can be relatively easily inserted from the inside into the openings of the soil. Thus, for example, thermal stresses that can occur due to different thermal expansion coefficients of the materials can be avoided. If the induction element is pressed under high pressure into the openings of the bottom, a cohesive material connection can be produced by friction welding.

Zur Erleichterung der Montage, insbesondere beim Einpressen des mindestens einen Induktionselements unter hohem Druck, kann in einer vorteilhaften Ausführungsform vorgesehen sein, dass der Boden des Grundkörpers eine umlaufende Vertiefung aufweist, auf der das Induktionselement mindestens abschnittsweise aufliegt.To facilitate the assembly, in particular when pressing the at least one induction element under high pressure, can be provided in an advantageous embodiment that the bottom of the body has a circumferential recess on which the induction element rests at least in sections.

Vorzugsweise ist der Grundkörper aus einem nicht-ferritischen Metall, insbesondere aus Aluminium oder Aluminiumguss hergestellt.Preferably, the base body is made of a non-ferritic metal, in particular of aluminum or cast aluminum.

Gemäß einer Variante kann vorgesehen sein, dass der Grundkörper aus einem nicht-metallischen Material, insbesondere aus Kunststoff, Glas oder Keramik hergestellt ist.According to a variant it can be provided that the base body is made of a non-metallic material, in particular of plastic, glass or ceramic.

Das erfindungsgemäße Verfahren zur Herstellung eines Kochgeschirrs zeichnet sich durch die folgenden Verfahrensschritte aus:

  • aus einem nicht-induktionsherdtauglichen Werkstoff wird ein Grundkörper mit einem Boden erzeugt, der mindestens eine Öffnung aufweist, welche den Boden vollständig durchdringt;
  • mindestens ein ferromagnetisches Induktionselement wird in der Weise erzeugt, dass es in seiner Größe und Form der Größe und Form der mindestens einen Öffnung entspricht, wobei mindestens ein Induktionssegment (50) an einer Unterseite des Induktionselements (5) angeordnet ist;
  • das mindestens eine ferromagnetische Induktionselement wird in die mindestens eine Öffnung eingesetzt.
The method according to the invention for producing a cookware is characterized by the following method steps:
  • from a material suitable for non-induction cooking, a base body is produced with a bottom which has at least one opening which completely penetrates the bottom;
  • at least one ferromagnetic induction element is made to correspond in size and shape to the size and shape of the at least one aperture, with at least one induction segment (50) disposed on a bottom surface of the induction element (5);
  • the at least one ferromagnetic induction element is inserted into the at least one opening.

Gemäß einer bevorzugten Ausführungsform des Verfahrens wird zwischen dem mindestens einen Induktionselement und den Abschnitten des Bodens, welche die mindestens eine Öffnung seitlich begrenzen, eine stoffschlüssige Verbindung hergestellt.According to a preferred embodiment of the method, a material connection is produced between the at least one induction element and the sections of the floor which laterally delimit the at least one opening.

In einer besonders bevorzugten Ausführungsform wird vorgeschlagen, dass das mindestens eine Induktionselement in die mindestens eine Öffnung des Bodens eingepresst wird. Wird das mindestens eine Induktionselement unter hohem Druck in die mindestens eine Öffnung des Bodens eingepresst, kann dabei durch Reibschweißen auf einfache Weise eine stoffschlüssige Verbindung zwischen dem mindestens einen Induktionselement und den Bereichen des Bodens des Grundkörpers erzeugt werden, welche die mindestens eine Öffnung des Bodens seitlich begrenzen.In a particularly preferred embodiment, it is proposed that the at least one induction element is pressed into the at least one opening of the bottom. If the at least one induction element is pressed under high pressure into the at least one opening of the base, a cohesive connection between the at least one induction element and the areas of the base of the base body can be generated by friction welding, which laterally surrounds the at least one opening of the base limit.

In einer besonders bevorzugten Ausführungsform wird vorgeschlagen, dass ein Grundkörper mit einer Mehrzahl von Öffnungen erzeugt wird, die den Boden durchdringen und in die jeweils ein Induktionselement eingesetzt wird. Es hat sich gezeigt, dass es für eine besonders hohe Effizienz bei der Wärmeerzeugung vorteilhaft ist, wenn mindestens etwa 60 Prozent der auf einer Unterseite des Kochgeschirrs zur Verfügung stehenden Kontaktfläche von den Induktionselementen ausgefüllt wird.In a particularly preferred embodiment, it is proposed that a base body is produced with a plurality of openings which penetrate the floor and into which an induction element is inserted in each case. It has been shown that it is advantageous for a particularly high efficiency in the heat generation, if at least about 60 percent of the available on a bottom of the cookware contact surface is filled by the induction elements.

Gemäß einer Variante wird vorgeschlagen dass ein Grundkörper mit einer Mehrzahl von Öffnungen erzeugt wird, die den Boden durchdringen und in die mindestens ein Induktionssegment, das an einer Unterseite des Induktionselements angeordnet wird, eingesetzt wird. Auch auf diese Weise kann erreicht werden, dass etwa 60 Prozent der Gesamtfläche der Unterseite des Kochgeschirrs ein ferromagnetisches Material aufweisen. Beispielsweise kann das Induktionselement auch eine Mehrzahl von Induktionssegmenten an seiner Unterseite aufweisen.According to a variant, it is proposed that a base body is produced with a plurality of openings which penetrate the bottom and into which at least one induction segment, which is arranged on a lower side of the induction element, is inserted. Also in this way can be achieved that about 60 percent of the total area of the underside of the cookware have a ferromagnetic material. For example, the induction element may also have a plurality of induction segments on its underside.

Weitere Merkmale und Vorteile der vorliegenden Erfindung werden deutlich anhand der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele unter Bezugnahme auf die beiliegenden Abbildungen. Darin zeigen

Fig. 1
einen Längsschnitt durch ein Kochgeschirr gemäß einer ersten Ausführungsform;
Fig. 2
eine Draufsicht auf das Kochgeschirr gemäß Fig. 1;
Fig. 3
einen Längsschnitt durch ein Kochgeschirr gemäß einer Ausführungsform der vorliegenden Erfindung;
Fig. 4
eine Draufsicht auf das Kochgeschirr gemäß Fig. 3.
Further features and advantages of the present invention will become apparent from the following description of preferred embodiments with reference to the accompanying drawings. Show in it
Fig. 1
a longitudinal section through a cookware according to a first embodiment;
Fig. 2
a plan view of the cookware according to Fig. 1 ;
Fig. 3
a longitudinal section through a cookware according to an embodiment of the present invention;
Fig. 4
a plan view of the cookware according to Fig. 3 ,

Zunächst wird auf Fig. 1 Bezug genommen, in der ein Längsschnitt durch ein Kochgeschirr 1 gemäß einer Ausführungsform dargestellt ist, bei der nicht alle zur Erfindung gehörenden Merkmale verwirklicht sind.First, it will open Fig. 1 Reference is made, in which a longitudinal section through a cookware 1 according to an embodiment is shown in which not all the features belonging to the invention are realized.

Bei dem Kochgeschirr 1, das in diesem ersten Ausführungsbeispiel gezeigt ist, handelt es sich um einen Kochtopf. Grundsätzlich kann das Kochgeschirr 1 beispielsweise auch eine Pfanne oder dergleichen sein. Das Kochgeschirr 1 umfasst einen Grundkörper 2, der aus einem Material hergestellt ist, das für ein Aufheizen durch ein Induktionskochfeld eines Induktionsherds nicht geeignet ist. Das bedeutet, dass der Grundkörper 2 des Kochgeschirrs 1 auf dem Induktionskochfeld eines Induktionsherds bei dessen Betrieb nicht unmittelbar erwärmt werden kann. Beispielsweise kann der Grundkörper 2 aus einem metallischen Werkstoff wie zum Beispiel aus Aluminium, Aluminiumguss oder einer Aluminiumlegierung, aus Kupfer oder einer Kupferlegierung hergestellt sein. Der Grundkörper 2 kann gemäß einer Variante auch aus einem nichtmetallischen Werkstoff wie zum Beispiel aus Glas, Keramik oder Kunststoff hergestellt sein.The cookware 1 shown in this first embodiment is a saucepan. Basically, the cookware 1, for example, a pan or the like. The cookware 1 comprises a main body 2 which is made of a material which is not suitable for heating by an induction hob of an induction cooker. This means that the base body 2 of the cookware 1 on the induction hob of an induction cooker during its operation can not be heated directly. For example, the base body 2 may be made of a metallic material such as aluminum, cast aluminum or an aluminum alloy, copper or a copper alloy. The main body 2 can according to a variant also be made of a non-metallic material such as glass, ceramic or plastic.

Man erkennt, dass der Grundkörper 2 einen Innenraum 3 seitlich begrenzt, welcher das Kochgut während der Benutzung des Kochgeschirrs 1 aufnehmen kann.It can be seen that the base body 2 laterally delimits an interior 3, which can receive the food during use of the cookware 1.

Unter Bezugnahme auf Fig. 2, in der das in Fig. 1 gezeigte Kochgeschirr 1 in einer Draufsicht dargestellt ist, weist der Grundkörper 2 einen Boden 4 auf, der eine Mehrzahl von Öffnungen (nicht mit Bezugszeichen versehen) umfasst. Die Öffnungen durchdringen den Boden 4 des Grundkörpers 2 vollständig und sind hinsichtlich ihrer Größe und Form dazu geeignet, jeweils ein entsprechend geformtes Induktionselement 5, das aus einem ferromagnetischen Werkstoff hergestellt ist, aufzunehmen.With reference to Fig. 2 in which the in Fig. 1 shown cookware 1 is shown in a plan view, the base body 2 has a bottom 4, which comprises a plurality of openings (not provided with reference numerals). The openings completely penetrate the bottom 4 of the main body 2 and, with respect to their size and shape, are suitable for respectively receiving a correspondingly shaped induction element 5 made of a ferromagnetic material.

In diesem Ausführungsbeispiel weist das Kochgeschirr 1 insgesamt sechs separate Induktionselemente 5 auf, die jeweils in einer ihnen zugeordneten Öffnung im Boden 4 des Grundkörpers 2 aufgenommen sind. Man erkennt, dass die Induktionselemente 5 in diesem Ausführungsbeispiel konzentrisch um einen Mittelpunkt des Bodens 4 angeordnet sind und sich von diesem Mittelpunkt radial nach außen erstrecken.In this embodiment, the cookware 1 a total of six separate induction elements 5, which are each received in an associated opening in the bottom 4 of the base body 2. It can be seen that the induction elements 5 are arranged concentrically around a center of the bottom 4 in this embodiment and extend radially outward from this center.

Jedes der Induktionselemente 5 ist, wie bereits oben erwähnt, aus einem ferromagnetischen Material hergestellt, so dass sich die Induktionselemente 5 während des Betriebs des Kochgefäßes 1 auf einem Induktionskochfeld eines Induktionsherds erwärmen können. Beispielsweise können die Induktionselemente 5 aus Stahl, Stahlguss oder Chromstahl hergestellt sein. Alternativ können die Induktionselemente 5 auch aus anderen ferromagnetischen Materialien wie zum Beispiel aus Nickel oder aus ferromagnetischen Legierungen hergestellt sein.Each of the induction elements 5 is, as already mentioned above, made of a ferromagnetic material, so that the induction elements 5 can heat up during the operation of the cooking vessel 1 on an induction hob of an induction cooker. For example, the induction elements 5 may be made of steel, cast steel or chrome steel. Alternatively, the induction elements 5 can also be made of other ferromagnetic materials such as Example be made of nickel or ferromagnetic alloys.

Bei der Herstellung des Kochgeschirrs 1 wird zunächst der Grundkörper 2 mit den entsprechenden Öffnungen im Boden 4 erzeugt, in die nachfolgend jeweils eines der Induktionselemente 5 eingesetzt wird. Die Induktionselemente 5 können in dieser Ausführungsform des Kochgeschirrs 1 entweder von unten oder von oben (das heißt, vom Innenraum 3 aus) in die dafür vorgesehenen Öffnungen des Bodens 4 des Grundkörpers 2 eingesetzt werdenIn the production of the cookware 1, the main body 2 is first produced with the corresponding openings in the bottom 4, in each of which one of the induction elements 5 is subsequently used. The induction elements 5 can be used in this embodiment of the cookware 1 either from below or from above (that is, from the interior 3) in the openings provided for the bottom 4 of the base body 2

Beispielsweise kann jedes der Induktionselemente 5 unter hohem Druck in die ihm zugeordnete Öffnung eingepresst werden, so dass dabei durch Reibschweißen eine stoffschlüssige Verbindung zwischen den Induktionselementen 5 und den Abschnitten des Bodens 4, welche die jeweiligen Öffnungen für die Induktionselemente 5 seitlich begrenzen, hergestellt werden kann.For example, each of the induction elements 5 can be pressed under high pressure into its associated opening, so that by friction welding a cohesive connection between the induction elements 5 and the portions of the bottom 4, which laterally delimit the respective openings for the induction elements 5, can be produced ,

Die Induktionselemente 5 können alternativ auch in die entsprechenden Öffnungen den Bodens 4 eingesetzt und anschließend durch Löten oder ein alternatives stoffschlüssiges Fügeverfahren fixiert werden.Alternatively, the induction elements 5 can also be inserted into the corresponding openings in the base 4 and then fixed by soldering or an alternative cohesive joining process.

Die ferromagnetischen Induktionselemente 5 können als Vollkörper oder als Hohlkörper ausgeführt sein. Es hat sich gezeigt, dass eine Ausführung der Induktionselemente 5 als Hohlkörper insbesondere dann vorteilhaft sein kann, wenn die Induktionselemente 5 in die Öffnungen des Bodens 4 eingepresst werden und dabei durch Reibschweißen eine stoffschlüssige Materialverbindung hergestellt wird.The ferromagnetic induction elements 5 can be designed as a solid body or as a hollow body. It has been found that an embodiment of the induction elements 5 as a hollow body can be advantageous in particular when the induction elements 5 are pressed into the openings of the bottom 4 and a cohesive material connection is produced by friction welding.

Man erkennt insbesondere in Fig. 1, dass die Induktionselemente 5 in diesem Ausführungsbeispiel sowohl auf einer Innenseite, welche dem Innenraum 3 zugewandt ist, als auch auf einer Außenseite mit den unmittelbar an die Induktionselemente 5 angrenzenden Bereichen des Bodens 4 des Grundkörpers 2 fluchten. Dadurch wird insbesondere erreicht, dass die Unterseite des Kochgefäßes 1 im Wesentlichen eben ist.One recognizes in particular in Fig. 1 in that the induction elements 5 in this exemplary embodiment are aligned both on an inner side which faces the inner space 3 and on an outer side with the areas of the base 4 of the base body 2 which are directly adjacent to the induction elements 5. This ensures in particular that the underside of the cooking vessel 1 is substantially planar.

Vorzugsweise wird die an den Innenraum 3 des Kochgefäßes 1 angrenzende Fläche der Induktionselemente 5 mit einer geeigneten Beschichtung versiegelt.Preferably, the adjacent to the interior 3 of the cooking vessel 1 surface of the induction elements 5 is sealed with a suitable coating.

Um die Herstellung des Kochgeschirrs 1 zu vereinfachen und die thermischen Eigenschaften der Unterseite des Kochgeschirrs 1 zu verbessern, sind in diesem Ausführungsbeispiel alle Induktionselemente 5 aus demselben Material hergestellt, damit auf der Unterseite des Kochgeschirrs 1 an den Positionen, an denen die Induktionselemente 5 vorgesehen sind, vergleichbare thermische Bedingungen herrschen. Es kann gemäß einer Variante auch vorgesehen sein, dass die Induktionselemente 5 aus unterschiedlichen ferromagnetischen Materialien hergestellt sind.In order to simplify the production of the cookware 1 and to improve the thermal properties of the underside of the cookware 1, in this embodiment, all the induction elements 5 are made of the same material, thus on the underside of the cookware 1 at the positions at which the induction elements 5 are provided , comparable thermal conditions prevail. It can also be provided according to a variant, that the induction elements 5 are made of different ferromagnetic materials.

Es hat sich gezeigt, dass abhängig von den eingesetzten Materialien und den gewählten Formen der Induktionselemente 5, die im Prinzip beliebig gewählt sein können, mindestens etwa 60 % der auf der Unterseite des Kochgeschirrs 1 zur Verfügung stehenden Gesamtfläche von den Induktionselementen 5 ausgefüllt sein sollte, damit eine möglichst hohe Effizienz bei der Wärmeerzeugung erzielt werden kann. Beispielsweise können die Induktionselemente 5 auch im Wesentlichen noppenartig ausgeführt sein.It has been found that, depending on the materials used and the chosen shapes of the induction elements 5, which in principle can be chosen arbitrarily, at least about 60% of the total area available on the underside of the cookware 1 should be filled by the induction elements 5, so that the highest possible efficiency in heat generation can be achieved. By way of example, the induction elements 5 can also be configured substantially knob-like.

Nachfolgend soll auf Fig. 3 Bezug genommen werden, in der ein Längsschnitt durch ein Kochgeschirr 1 gemäß einer Ausführungsform der vorliegenden Erfindung dargestellt ist. Bei dem Kochgeschirr 1 handelt es sich wiederum um einen Kochtopf. Das Kochgeschirr 1 gemäß dieser Ausführungsform kann beispielsweise auch eine Pfanne oder dergleichen sein. Der Grundkörper 2 ist wie im ersten Ausführungsbeispiel aus einem nicht-induktionsherdtauglichen Material hergestellt, welches also für ein Induktionsheizen auf einem Induktionskochfeld nicht geeignet ist. Der Grundkörper 2 kann aus einem metallischen Werkstoff wie zum Beispiel aus Aluminium, Aluminiumguss oder einer Aluminiumlegierung, aus Kupfer oder einer Kupferlegierung hergestellt sein. Der Grundkörper 2 kann alternativ auch aus nichtmetallischen Werkstoffen wie zum Beispiel aus Glas, Keramik oder Kunststoff hergestellt sein.Below is on Fig. 3 Referring to Figure 1, a longitudinal section through a cookware 1 according to one embodiment of the present invention is shown. The cookware 1 is again a saucepan. The cookware 1 according to this embodiment may be, for example, a pan or the like. The main body 2 is made as in the first embodiment of a non-induction cooker suitable material, which is therefore not suitable for induction heating on an induction hob. The base body 2 may be made of a metallic material such as aluminum, cast aluminum or an aluminum alloy, copper or a copper alloy. The main body 2 may alternatively be made of non-metallic materials such as glass, ceramic or plastic.

Der Boden 4 des Grundkörpers 2 umfasst in diesem Ausführungsbeispiel eine im Wesentlichen ringförmig ausgebildete Vertiefung 40, auf der ein Randbereich des ferromagnetischen Induktionselements 5 abschnittsweise aufliegt. Auf einer dem Innenraum 3 zugewandten Seite fluchtet das Induktionselement 5 mit den unmittelbar daran angrenzenden Abschnitten des Bodens 4.In this exemplary embodiment, the base 4 of the base body 2 comprises a substantially annular depression 40, on which an edge region of the ferromagnetic induction element 5 rests in sections. On a side facing the interior 3, the induction element 5 is in alignment with the sections of the bottom 4 immediately adjacent thereto.

In Fig. 4 ist eine Draufsicht auf das Kochgeschirr gemäß Fig. 3 dargestellt. Das Induktionselement 5 umfasst in diesem Ausführungsbeispiel an einer Unterseite insgesamt sechs Induktionssegmente 50, die sich von einem gemeinsamen Mittelpunkt nach außen hin erstrecken. Dabei kann die geometrische Form der Induktionssegmente 50 im Prinzip beliebig gewählt sein. Es kann zum Beispiel vorgesehen sein, dass eine Mehrzahl im Wesentlichen noppenartig geformter Induktionssegmente eingesetzt wird, die konzentrisch auf der Unterseite des Induktionselements 5 angeordnet sein können und sich vom Mittelpunkt des Induktionselements 5 radial nach außen erstrecken können.In Fig. 4 is a plan view of the cookware according to Fig. 3 shown. In this exemplary embodiment, the induction element 5 comprises on a bottom side a total of six induction segments 50 which extend outward from a common center point. In this case, the geometric shape of the induction segments 50 can be chosen arbitrarily in principle. It can be provided, for example, that a plurality of substantially knob-like shaped induction segments is used, which can be arranged concentrically on the underside of the induction element 5 and can extend radially outwardly from the center of the induction element 5.

Diese noppenartigen Segmente können unterschiedliche Durchmesser aufweisen. Werden zum Beispiel relativ kleine noppenartige Induktionssegmente mit einem relativ geringen Durchmesser eingesetzt, müssen verhältnismäßig viele Öffnungen im Boden 4 des Grundkörpers 2 zur Verfügung gestellt werden, in die die noppenartigen Induktionssegmente jeweils eingreifen können.These knob-like segments may have different diameters. For example, if relatively small knob-like induction segments are used with a relatively small diameter, a relatively large number of openings in the bottom 4 of the base body 2 must be made available, in which the knob-like induction segments can each engage.

Das Induktionselement 5 mit den Induktionssegmenten 50 an seiner Unterseite ist aus einem ferromagnetischen Werkstoff hergestellt. Beispielsweise können die im ersten Ausführungsbeispiel genannten ferromagnetischen Werkstoffe eingesetzt werden. Dabei ist es vorteilhaft, dass sowohl das Induktionselement 5 als auch die Induktionssegmente 50 aus demselben ferromagnetischen Werkstoff hergestellt sind, um thermische Spannungen, die auf Grund unterschiedlicher thermischer Ausdehnungskoeffizienten auftreten können, nach Möglichkeit vermeiden zu können. Grundsätzlich können das Induktionselement 5 und die Induktionssegmente 50 aber auch aus unterschiedlichen ferromagnetischen Materialien hergestellt sein.The induction element 5 with the induction segments 50 on its underside is made of a ferromagnetic material. For example, the ferromagnetic materials mentioned in the first embodiment can be used. It is advantageous that both the induction element 5 and the induction segments 50 are made of the same ferromagnetic material in order to avoid thermal stresses that may occur due to different thermal expansion coefficients, if possible. In principle, however, the induction element 5 and the induction segments 50 can also be made of different ferromagnetic materials.

Das Induktionselement 5 mit den Induktionssegmenten 50 kann bei der Herstellung des Kochgeschirrs 1 wiederum unter hohem Druck in die entsprechend vorgesehenen Öffnungen des Bodens 4 des Grundkörpers 2 eingepresst werden, welche die Induktionssegmente 50 des Induktionselements 5 aufnehmen. Dabei kann dann durch Reibschweißen wiederum eine stoffschlüssige Materialverbindung hergestellt werden. Es wird damit deutlich, dass dabei auch jedes der Induktionssegmente 50 des Induktionselements 5 unter hohem Druck in die entsprechend vorgesehenen Öffnungen des Bodens 4 eingepresst wird, so dass dabei wiederum durch Reibschweißen eine stoffschlüssige Verbindung zwischen den Induktionssegmenten 50 und den Bereichen des Bodens 4, welche die Öffnungen für die Induktionssegmente 50 seitlich begrenzen, hergestellt werden kann.The induction element 5 with the induction segments 50 can be pressed in the manufacture of the cookware 1 again under high pressure in the correspondingly provided openings of the bottom 4 of the base body 2, which receive the induction segments 50 of the induction element 5. In this case, by friction welding in turn a cohesive material connection can be made. It is thus clear that each of the induction segments 50 of the induction element 5 is pressed under high pressure into the corresponding openings provided in the bottom 4, so that in turn by friction welding a cohesive connection between the induction segments 50 and the areas of the bottom 4, which the openings for the induction segments 50 laterally limit, can be produced.

Bei der Herstellung des Kochgeschirrs wird somit das gemäß der zweiten Ausführungsform aufgebaute Induktionselement 5 nicht, wie aus dem Stand der Technik bekannt, von außen an einer Unterseite des Bodens angebracht, sondern vom Innenraum 3 aus in die entsprechend ausgeschnittenen Öffnungen des Boden 4 des Grundkörpers 2 eingesetzt. Dies führt zu einer erhöhten Stabilität der gesamten Anordnung und verhindert, dass sich das Induktionselement 5 bei längerem Betrieb zum Beispiel auf Grund thermischer Spannungen vom Boden 4 des Grundkörpers 2 ablösen kann.In the production of the cookware thus constructed according to the second embodiment, the induction element 5 is not, as known from the prior art, attached from the outside to an underside of the bottom, but from the interior 3 into the corresponding cut openings of the bottom 4 of the base body second used. This leads to an increased stability of the entire arrangement and prevents the induction element 5 from becoming detached from the base 4 of the base body 2 during prolonged operation, for example due to thermal stresses.

Alternativ kann das Induktionselement 5 auch mit Hilfe anderer aus dem Stand der Technik bekannter Fügeverfahren, insbesondere durch Löten, stoffschlüssig im Boden 4 des Grundkörpers 2 angebracht werden.Alternatively, the induction element 5 can also be attached in the base 4 of the base body 2 with the aid of other joining methods known from the prior art, in particular by soldering.

Bei der Herstellung des Kochgefäßes 1 wird also zunächst wiederum der Grundkörper 2 zusammen mit den entsprechenden Öffnungen im Boden 4, die das Induktionselement 5 mit den Induktionssegmenten 50 an dessen Unterseite aufnehmen sollen, aus einem nicht-induktionsherdtauglichen Material erzeugt. Anschließend wird das Induktionselement 5 zusammen mit den Induktionssegmenten 50 unter hohem Druck in die dafür vorgesehenen Öffnungen des Bodens 4 eingepresst. Auf Grund der dabei durch Reibung entstehenden Wärme zwischen den Bereichen des Bodens 4, welche die Öffnungen seitlich begrenzen und den Induktionssegmenten 50 beziehungsweise der Grundplatte 5 wird wiederum durch Reibschweißen eine stoffschlüssig ge Verbindung zwischen den Materialien hergestellt.In the production of the cooking vessel 1, therefore, the main body 2 is first again generated together with the corresponding openings in the bottom 4, which are to receive the induction element 5 with the induction segments 50 on the underside of a non-induction cooker suitable material. Subsequently, the induction element 5 is pressed together with the induction segments 50 under high pressure in the openings provided for the bottom 4. Due to the heat generated thereby by friction between the areas of the bottom 4, which laterally delimit the openings and the induction segments 50 and the base plate 5 is in turn made by friction welding a cohesive ge connection between the materials.

Das Induktionselement 5 und die Induktionssegmente 50 können auch in diesem Ausführungsbeispiel als Vollkörper oder als Hohlkörper ausgeführt sein. Beispielsweise können auch im Wesentlichen noppenartig geformte Induktionssegmente 50 eingesetzt werden, die konzentrisch auf der Unterseite des Induktionselements angeordnet sein können und sich vom Mittelpunkt radial nach außen erstrecken können.The induction element 5 and the induction segments 50 can also be designed in this embodiment as a solid body or as a hollow body. For example, also substantially knob-like shaped induction segments 50 can be used, which can be arranged concentrically on the underside of the induction element and can extend radially outwardly from the center.

Es hat sich auch bei dieser Ausführungsform gezeigt, dass die Induktionssegmente 50 mindestens etwa 60% der zur Verfügung stehenden Gesamtfläche auf der Unterseite des Kochgeschirrs 1 einnehmen sollten, damit bei der Wärmeerzeugung eine ausreichende Effizienz erzielt wird.It has also been found in this embodiment that the induction segments 50 should occupy at least about 60% of the total available area on the underside of the cookware 1 in order to achieve sufficient efficiency in heat generation.

Vorzugsweise wird auch in diesem Ausführungsbeispiel die an den Innenraum 3 des Kochgefäßes 1 angrenzende Fläche des Induktionselements 5 mit einer geeigneten Beschichtung versiegelt.Preferably, in this embodiment, the adjacent to the interior 3 of the cooking vessel 1 surface of the induction element 5 is sealed with a suitable coating.

Ein Vorteil der hier vorgestellten vorteilhaften Ausführungsform der vorliegenden Erfindung besteht darin, dass das Kochgeschirr 1 auf einem Induktionskochfeld eines Induktionsherds eingesetzt werden kann, ohne dass während des Betriebs Verwindungen und Spannungen in dem Maße auftreten, dass das Kochgeschirr 1 auf längere Sicht unbrauchbar wird.An advantage of the advantageous embodiment of the present invention presented here is that the cookware 1 can be used on an induction hob of an induction cooker without distortions and tensions during operation to such an extent that the cookware 1 becomes unusable in the longer term.

Claims (15)

  1. Cookware (1), comprising a base body (2) which is produced from a material which is not suitable for use on an induction cooker, and has a base (4) of which at least portions comprise a ferromagnetic induction element (5),
    characterized
    in that the base (4) of the base body (2) has at least one opening which penetrates the base (4) and into which the at least one ferromagnetic induction element (5) is inserted, and
    in that the at least one ferromagnetic induction element (5) has at least one induction segment (50) on a lower face, the said induction segment being inserted into an opening, which is associated with said induction segment, in the base (4).
  2. Cookware according to Claim 1, characterized in that the cookware (1) has a plurality of ferromagnetic induction elements (5), with each of the induction elements (5) being inserted into an opening, which is associated with the said induction element, in the base (4).
  3. Cookware according to Claim 2, characterized in that the ferromagnetic induction elements (5) are arranged concentrically in the base (4) of the base body (2).
  4. Cookware according to Claim 2 or 3, characterized in that the ferromagnetic induction elements (5) extend radially outwards from a centre point of the base (4).
  5. Cookware according to one of Claims 1 to 4, characterized in that the ferromagnetic induction element (5) has a plurality of induction segments (50) on a lower face, the said induction segments being inserted in at least one opening, which is associated with the said induction segments, in the base (4).
  6. Cookware according to Claim 1 or 5, characterized in that the induction segments (50) extend radially outwards from a common centre point.
  7. Cookware according to one of Claims 1 to 6, characterized in that the induction segments (50) are arranged concentrically on the lower face of the induction element (5).
  8. Cookware according to one of Claims 1 to 7, characterized in that the induction segments (50) are integrally formed with the induction element (5).
  9. Cookware according to one of Claims 1 to 8, characterized in that the base (4) of the base body (2) has a circumferential recess (40) on which at least portions of the at least one induction element (5) rest,
  10. Cookware according to one of Claims 1 to 9, characterized in that the base body (2) is produced from a non-ferritic metal, in particular from aluminium or cast aluminium.
  11. Cookware according to one of Claims 1 to 9, characterized in that the base body (2) is produced from a non-metallic material, in particular from plastic, glass or ceramic.
  12. Method for producing an item of cookware, characterized by the following method steps:
    • a base body (2) with a base (4) is generated from a material which is not suitable for use in an induction cooker, the said base body having at least one opening which fully penetrates the base (4) ;
    • at least one ferromagnetic induction element (5) is generated in such a way that its size and shape correspond to the size and shape of the at least one opening in the base (4), wherein at least one induction segment (50) is arranged on a lower face of the induction element (5);
    • the at least one ferromagnetic induction element (5) is inserted into the at least one opening.
  13. Method according to Claim 12, characterized in that a cohesive connection is established between the at least one induction element (5) and the portions of the base (4) which laterally bound the at least one opening.
  14. Method according to Claim 12 or 13, characterized in that the at least one induction element (5) is pressed into the at least one opening in the base (4).
  15. Method according to one of Claims 12 to 14, characterized in that a base body (2) is generated with a plurality of openings which penetrate the base (4) and into which an induction element (5) is inserted in each case.
EP05006319A 2005-03-22 2005-03-22 Cooking vessel and method for manufacturing the same Not-in-force EP1704937B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT05006319T ATE435079T1 (en) 2005-03-22 2005-03-22 COOKWARE AND METHOD FOR PRODUCING COOKWARE
EP05006319A EP1704937B1 (en) 2005-03-22 2005-03-22 Cooking vessel and method for manufacturing the same
DE502005007613T DE502005007613D1 (en) 2005-03-22 2005-03-22 Cookware and method of making a cookware

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05006319A EP1704937B1 (en) 2005-03-22 2005-03-22 Cooking vessel and method for manufacturing the same

Publications (2)

Publication Number Publication Date
EP1704937A1 EP1704937A1 (en) 2006-09-27
EP1704937B1 true EP1704937B1 (en) 2009-07-01

Family

ID=34934440

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05006319A Not-in-force EP1704937B1 (en) 2005-03-22 2005-03-22 Cooking vessel and method for manufacturing the same

Country Status (3)

Country Link
EP (1) EP1704937B1 (en)
AT (1) ATE435079T1 (en)
DE (1) DE502005007613D1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITVB20100003A1 (en) * 2010-10-26 2011-01-25 Andrea Ottoni PRODUCTION PROCESS FOR THE APPLICATION OF PLATE OR RING IN FERROMAGNETIC MATERIAL ON THE SIDE OF THE BOTTOM OF COOKING VESSELS IN ALUMINUM OR ITS ALLOYS.

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5647271A (en) * 1992-07-06 1997-07-15 Seb Kitchenware with thermal conducting system
DE9315661U1 (en) * 1993-10-14 1994-02-24 Fa. Alfred Herzog, 58540 Meinerzhagen Cookware with an aluminum base plate
DE4421904C2 (en) * 1994-06-24 1998-05-28 Vesta Ag & Co Ohg Pot-shaped cooking and / or cooking device
FI101260B (en) * 1995-04-20 1998-05-29 Rondex Oy Ltd Method of joining metal parts
IT1312566B1 (en) * 1999-05-21 2002-04-22 Lagostina Spa COOKING APPLIANCE WITH BOTTOM SUITABLE FOR THE SUPPLY OF ENERGY THROUGH ELECTROMAGNETIC CONDUCTION AND INDUCTION.

Also Published As

Publication number Publication date
ATE435079T1 (en) 2009-07-15
DE502005007613D1 (en) 2009-08-13
EP1704937A1 (en) 2006-09-27

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