EP2241822A2 - Covering plate for a cooktop - Google Patents
Covering plate for a cooktop Download PDFInfo
- Publication number
- EP2241822A2 EP2241822A2 EP10158901A EP10158901A EP2241822A2 EP 2241822 A2 EP2241822 A2 EP 2241822A2 EP 10158901 A EP10158901 A EP 10158901A EP 10158901 A EP10158901 A EP 10158901A EP 2241822 A2 EP2241822 A2 EP 2241822A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- cover plate
- elevations
- heating zone
- covering plate
- plate according
- 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.)
- Withdrawn
Links
- 238000010438 heat treatment Methods 0.000 claims abstract description 32
- 229910052751 metal Inorganic materials 0.000 claims abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 8
- 239000006112 glass ceramic composition Substances 0.000 claims abstract description 6
- 239000011521 glass Substances 0.000 claims description 4
- 230000006698 induction Effects 0.000 claims description 4
- 239000002241 glass-ceramic Substances 0.000 claims description 2
- 238000005553 drilling Methods 0.000 abstract 1
- 238000010411 cooking Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 5
- 238000009413 insulation Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 229910052572 stoneware Inorganic materials 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/10—Tops, e.g. hot plates; Rings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/10—Tops, e.g. hot plates; Rings
- F24C15/107—Pan supports or grates therefor
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
- H05B6/12—Cooking devices
- H05B6/1209—Cooking devices induction cooking plates or the like and devices to be used in combination with them
Definitions
- the invention relates to a cover plate for a hob with at least one heating zone and a plurality of radially extending elevations for setting up a cookware element.
- the phenomenon of dancing pots occurs.
- the magnetic fields generated for heating the cookware element or interference between different portions of such fields not only lead to the desired eddy currents in the bottom of the pot, but also generate an oscillating force acting on the pot or the cookware element. If the saucepan is not safe on the hob because of a deformed floor or the like, these forces can lead to disturbing rattling of the cooking pot.
- the invention is in particular the object of improving the stability of a cooking utensil element on an induction hob to avoid noise due to rattling cookware elements.
- the invention is particularly based on a cover plate for a hob with at least one heating zone and a plurality of radially extending elevations for setting up a cookware element.
- the cover plate comprises exactly three elevations per heating zone. This can ensure that the cookware element, so for example a saucepan or a pan, is supported in a statically determined manner. A rattling of the cooking utensil element is thus excluded.
- elongated elevations should be referred to as radially extending elevation, the longitudinal direction of which has a radial component, in particular those whose longitudinal direction deviate from a radial direction by less than 20 degrees or 30 degrees.
- spiral elevations conceivable.
- their elevations are rib-shaped and / or have over their length at least substantially constant profile.
- the cover plate and the protrusions may be made of a known glass material or glass-ceramic material or, alternatively, stoneware and / or fiber-reinforced press materials. It is conceivable that the cover plate is made of glass or glass ceramic, while the surveys designed as metal attachments or metal inserts are that can be glued to the cover plate, welded or fused.
- a marking of the edge of the heating zone on the cover plate can be avoided and / or supplemented if a radially outer end of the elevations marks a radially outer edge of the heating zone.
- Tilting of the cooking utensil element can be avoided if it is not placed in the center by the elevations meet in the middle of the heating zone.
- the heating zone is an induction heating zone with inductors arranged under the cover plate.
- the inventive design of the cover can also be used in hobs with radiant heaters and avoid an unstable state of the saucepan.
- the wear resistance of the bumps can be improved if they are flattened in their highest range.
- Fig. 1 shows a hob with a cover plate and four heating zones 10a - 10d.
- three radially extending elevations 12 are formed on the otherwise flat surface of the cover plate.
- the elevations 12 are used to set up a cooking utensil element, not shown here, for example, a pan or a saucepan, on the heating zone 10a - 10d.
- the three protuberances 12 are in the form of elongate ribs with constant profile over the length and extend radially from the edge of the heating zone 10a-10d to their midpoint.
- the edge of the heating zone coincides with the radially outer edge of the under the cover plate arranged inductors 14, which are shown here only schematically.
- the elevations 12 of the cover plate are made of the same glass ceramic material as the rest of the cover plate.
- the material of the projections is applied to the material of the cover plate before sintering and sintered together with the rest of the cover plate.
- the elevations 12 may be formed from subsequently fused to the rest of the cover plate glass.
- the radially outer end of the elevations 12 coincides with the edge of the heating zone 10a-10d, this edge is visualized and marked by the elevations 12. Another marking, such as a serigraphy on the back of the cover, can be avoided. Because the bumps 12 meet in the middle of the heating zone 10a-10d, even very small cooking pots can be safely placed on the heating zone 10a-10d, even if the inductors 14 have a much larger diameter than the pot in question.
- the elevations 12 are flattened in the highest area 16 so as to further improve stability of the cooking pot.
- Fig. 2 shows a sectional view of the cover plate FIG. 1 with a survey 12, which consists of a glued, welded or fused to the glass plate metal element.
- the metal element is made of a cut to length, rounded end band material having a flat bottom for connection to the cover plate and a convex top.
- Fig. 4 shows a sectional view of a cover plate of a hob according to a further alternative embodiment of the invention.
- the elevations 12 are formed as bonded to the cover metal elements which are inserted into corresponding recesses 18 in the glass ceramic material of the cover plate and / or anchored in holes in the cover plate.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Cookers (AREA)
- Electric Stoves And Ranges (AREA)
- Baking, Grill, Roasting (AREA)
- Induction Heating Cooking Devices (AREA)
Abstract
Description
Die Erfindung geht aus von einer Abdeckplatte für ein Kochfeld mit wenigstens einer Heizzone und mehreren radial verlaufenden Erhebungen zum Aufstellen eines Kochgeschirrelements.The invention relates to a cover plate for a hob with at least one heating zone and a plurality of radially extending elevations for setting up a cookware element.
Insbesondere in Induktionskochfeldern tritt das Phänomen der tanzenden Töpfe auf. Die zum Beheizen des Kochgeschirrelements erzeugten Magnetfelder bzw. Interferenzen zwischen unterschiedlichen Anteilen solcher Felder führen nicht nur zu den gewünschten Wirbelströmen im Topfboden, sondern erzeugen auch eine oszillierende Kraft, die auf den Topf- bzw. das Kochgeschirrelement wirkt. Wenn der Kochtopf wegen eines deformierten Bodens oder dergleichen nicht sicher auf dem Kochfeld steht, können diese Kräfte zu einem störenden Klappern des Kochtopfs führen.Especially in induction hobs, the phenomenon of dancing pots occurs. The magnetic fields generated for heating the cookware element or interference between different portions of such fields not only lead to the desired eddy currents in the bottom of the pot, but also generate an oscillating force acting on the pot or the cookware element. If the saucepan is not safe on the hob because of a deformed floor or the like, these forces can lead to disturbing rattling of the cooking pot.
Aus der
Um ein solches Klappern zu vermeiden, sind verschiedene Strategien zur Abstimmung von Frequenzen der von unterschiedlichen Induktoren erzeugten Wechselmagnetfelder bekannt. Beispielsweise ist es bekannt, stets auf einem minimalen Abstand zwischen den Frequenzen der Heizströme zu achten, um niederfrequente Schwebungen im Bereich von hörbaren Frequenzen und/oder im Bereich von Resonanzfrequenzen eines den Kochtopf umfassenden mechanischen Systems zu vermeiden. Eine solche Steuerung ist vergleichsweise komplex und schränkt zudem naturgemäß die Freiheit bei der Bestimmung der Heizfrequenzen und damit die unabhängige Einstellbarkeit der Heizleistungen unterschiedlicher Induktoren stark ein.To avoid such rattling, various strategies for tuning frequencies of alternating magnetic fields generated by different inductors are known. For example, it is known to always pay attention to a minimum distance between the frequencies of the heating currents in order to avoid low-frequency beats in the range of audible frequencies and / or in the range of resonance frequencies of a mechanical system comprising the cooking pot. Such control is comparative complex and, moreover, naturally limits the freedom in determining the heating frequencies and thus the independent adjustability of the heating power of different inductors strongly.
Der Erfindung liegt insbesondere die Aufgabe zugrunde, die Standfestigkeit eines Kochgeschirrelements auf einem Induktionskochfeld zu verbessern, um eine Lärmentwicklung durch klappernde Kochgeschirrelemente zu vermeiden.The invention is in particular the object of improving the stability of a cooking utensil element on an induction hob to avoid noise due to rattling cookware elements.
Die Aufgabe wird insbesondere durch eine Abdeckplatte für ein Kochfeld nach dem Anspruch 1 gelöst. Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen.The object is achieved in particular by a cover plate for a hob according to claim 1. Advantageous embodiments and modifications of the invention will become apparent from the dependent claims.
Die Erfindung geht insbesondere aus von einer Abdeckplatte für ein Kochfeld mit wenigstens einer Heizzone und mehreren radial verlaufenden Erhebungen zum Aufstellen eines Kochgeschirrelements.The invention is particularly based on a cover plate for a hob with at least one heating zone and a plurality of radially extending elevations for setting up a cookware element.
Es wird vorgeschlagen, dass die Abdeckplatte genau drei Erhebungen pro Heizzone umfasst. Dadurch kann sichergestellt werden, dass das Kochgeschirrelement, also beispielsweise ein Kochtopf oder eine Pfanne, in einer statisch bestimmten Weise abgestützt wird. Ein Klappern des Kochgeschirrelements ist damit ausgeschlossen.It is proposed that the cover plate comprises exactly three elevations per heating zone. This can ensure that the cookware element, so for example a saucepan or a pan, is supported in a statically determined manner. A rattling of the cooking utensil element is thus excluded.
Als radial verlaufende Erhebung sollen insbesondere längliche Erhebungen bezeichnet werden, deren Längsrichtung eine radiale Komponente hat, insbesondere solche, deren Längsrichtung um weniger als 20 Grad oder 30 Grad von einer radialen Richtung abweichen. Es sind auch spiralförmig verlaufende Erhebungen denkbar.In particular elongated elevations should be referred to as radially extending elevation, the longitudinal direction of which has a radial component, in particular those whose longitudinal direction deviate from a radial direction by less than 20 degrees or 30 degrees. There are also conceivable spiral elevations conceivable.
In einer besonders vorteilhaften Ausgestaltung der Erfindung sind ihre Erhebungen rippenförmig und/oder haben ein über ihre Länge zumindest im Wesentlichen konstantes Profil.In a particularly advantageous embodiment of the invention, their elevations are rib-shaped and / or have over their length at least substantially constant profile.
Die Abdeckplatte und die Erhebungen können aus einem bekannten Glasmaterial oder Glaskeramikmaterial hergestellt sein oder alternativ aus Steingut und/oder faserverstärkten Pressmaterialien. Dabei ist es denkbar, dass die Abdeckplatte aus Glas oder Glaskeramik gefertigt ist, während die Erhebungen als Metallaufsätze oder Metalleinsätze ausgebildet sind, die mit der Abdeckplatte verklebt, verschweißt oder verschmolzen sein können.The cover plate and the protrusions may be made of a known glass material or glass-ceramic material or, alternatively, stoneware and / or fiber-reinforced press materials. It is conceivable that the cover plate is made of glass or glass ceramic, while the surveys designed as metal attachments or metal inserts are that can be glued to the cover plate, welded or fused.
Eine Markierung des Rands der Heizzone auf der Abdeckplatte kann vermieden und/oder ergänzt werden, wenn ein radial äußeres Ende der Erhebungen einen radial äußeren Rand der Heizzone markiert.A marking of the edge of the heating zone on the cover plate can be avoided and / or supplemented if a radially outer end of the elevations marks a radially outer edge of the heating zone.
Ein Kippen des Kochgeschirrelements kann vermieden werden, wenn dieses nicht mittig aufgestellt ist, indem sich die Erhebungen in der Mitte der Heizzone treffen.Tilting of the cooking utensil element can be avoided if it is not placed in the center by the elevations meet in the middle of the heating zone.
Die Vorteile der Lärmreduktion kommen insbesondere dann zum Tragen, wenn die Heizzone eine Induktionsheizzone mit unter der Abdeckplatte angeordneten Induktoren ist. Die erfindungsgemäße Gestaltung der Abdeckplatte kann jedoch auch in Kochfelder mit Strahlungsheizkörpern eingesetzt werden und dort einen instabilen Stand des Kochtopfs vermeiden.The advantages of noise reduction come into play in particular when the heating zone is an induction heating zone with inductors arranged under the cover plate. However, the inventive design of the cover can also be used in hobs with radiant heaters and avoid an unstable state of the saucepan.
Die Verschleißfestigkeit der Erhebungen kann verbessert werden, wenn diese in ihrem höchsten Bereich abgeflacht sind.The wear resistance of the bumps can be improved if they are flattened in their highest range.
Weitere Vorteile und Merkmale der Erfindung ergeben sich aus der folgenden Zeichnungsbeschreibung. In der Zeichnung sind Ausführungsbeispiele der Erfindung dargestellt. Die Zeichnung, die Beschreibung und die Ansprüche enthalten zahlreiche Merkmale in Kombination. Der Fachmann wird die Merkmale zweckmäßigerweise auch einzeln betrachten und zu sinnvollen weiteren Kombinationen zusammenfassen.Further advantages and features of the invention will become apparent from the following description. In the drawings, embodiments of the invention are shown. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.
- Fig. 1.Fig. 1.
- ein Kochfeld mit einer erfindungsgemäßen Abdeckplatte nach einem ersten Ausführungsbeispiel der Erfindung,a hob with a cover plate according to the invention according to a first embodiment of the invention,
- Fig. 2.Fig. 2.
-
eine Schnittdarstellung einer Abdeckplatte des Kochfelds aus
Fig. 1 ,a sectional view of a cover plate of the hobFig. 1 . - Fig. 3Fig. 3
- eine Schnittdarstellung einer Abdeckplatte nach einer weiteren Ausgestaltung der Erfindung mit einer Erhebung aus Metall unda sectional view of a cover plate according to a further embodiment of the invention with a collection of metal and
- Fig. 4Fig. 4
- eine Schnittdarstellung einer Abdeckplatte eines Kochfelds nach einer weiteren Ausgestaltung der Erfindung mit einem in eine Vertiefung eingelassenen Metallelement.a sectional view of a cover plate of a hob according to another embodiment of the invention with a recessed in a recess metal element.
Die drei Erhebungen 12 haben die Form von länglichen Rippen mit über die Länge konstantem Profil und verlaufen radial vom Rand der Heizzone 10a - 10d bis zu ihrem Mittelpunkt. Der Rand der Heizzone fällt mit dem radial äußeren Rand der unter der Abdeckplatte angeordneten Induktoren 14 zusammen, die hier nur schematisch dargestellt sind.The three
In dem in
Da das radial äußere Ende der Erhebungen 12 mit dem Rand der Heizzone 10a - 10d zusammenfällt, wird dieser Rand durch die Erhebungen 12 visualisiert und markiert. Eine weitere Markierung, beispielsweise eine Serigraphie auf der Rückseite der Abdeckplatte, kann dadurch vermieden werden. Dadurch, dass sich die Erhebungen 12 in der Mitte der Heizzone 10a - 10d treffen, können auch sehr kleine Kochtöpfe sicher auf die Heizzone 10a - 10d aufgestellt werden, selbst wenn die Induktoren 14 einen sehr viel größeren Durchmesser als der betreffende Kochtopf haben.Since the radially outer end of the
Die Erhebungen 12 sind im höchsten Bereich 16 abgeflacht, um so eine Standsicherheit des Kochtopfs weiter zu verbessern.The
- 10a10a
- Heizzoneheating zone
- 10b10b
- Heizzoneheating zone
- 10c10c
- Heizzoneheating zone
- 10d10d
- Heizzoneheating zone
- 1212
- Erhebungsurvey
- 1414
- Induktorinductor
- 1616
- BereichArea
- 1818
- Vertiefungdeepening
Claims (9)
dadurch gekennzeichnet, dass, die Abdeckplatte genau drei Erhebungen (12) pro Heizzone (10a - 10d) umfasst.Cover plate for a hob with at least one heating zone (10a-10d) and a plurality of radially extending elevations (12) for setting up a cookware element,
characterized in that the cover plate comprises exactly three elevations (12) per heating zone (10a - 10d).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES200930076A ES2361106B1 (en) | 2009-04-17 | 2009-04-17 | COVER PLATE FOR A COOKING FIELD. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2241822A2 true EP2241822A2 (en) | 2010-10-20 |
EP2241822A3 EP2241822A3 (en) | 2017-09-13 |
Family
ID=42561056
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10158901.8A Withdrawn EP2241822A3 (en) | 2009-04-17 | 2010-04-01 | Covering plate for a cooktop |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2241822A3 (en) |
ES (1) | ES2361106B1 (en) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55152694U (en) * | 1979-04-19 | 1980-11-04 | ||
DE3602666A1 (en) | 1986-01-29 | 1987-07-30 | Wmf Wuerttemberg Metallwaren | Appliance for cooking food |
JPH03122992A (en) * | 1989-10-04 | 1991-05-24 | Matsushita Electric Ind Co Ltd | Induction heting cooking apparatus |
EP1217873A2 (en) * | 2000-12-21 | 2002-06-26 | E.G.O. ELEKTRO-GERÄTEBAU GmbH | Temperature of cooking vessels sensing method and device |
CN2708602Y (en) * | 2004-05-31 | 2005-07-06 | 杨集芳 | Electromagnetic oven panel |
CN2851896Y (en) * | 2005-12-16 | 2006-12-27 | 古宝贵 | Structure improvement of electromagnetic stove |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2257397A (en) * | 1940-03-30 | 1941-09-30 | Gas Products Corp | Top burner closure structure |
FR1114051A (en) * | 1954-11-12 | 1956-04-09 | Ideal Standard | Gas cookers |
US3949183A (en) * | 1972-10-20 | 1976-04-06 | Mitsubishi Denki Kabushiki Kaisha | Cover plate for induction heating apparatus |
FR2669404A1 (en) * | 1990-11-16 | 1992-05-22 | Philips Atoires Electronique | Hot-plate and utensil equipped with respective means selectively controlling their heat exchanges |
IT1255337B (en) * | 1992-07-13 | 1995-10-31 | Whirlpool Italia | DEVICE TO DETECT THE PRESENCE AND / OR THE TEMPERATURE OF A CONTAINER FOR THE PREPARATION OF FOOD PLACED ON A GLASS CERAMIC HOB |
FR2773873B1 (en) * | 1998-01-20 | 2000-02-25 | Eurokera | COOKING APPLIANCE |
ES2269247T3 (en) * | 2001-04-11 | 2007-04-01 | Whirlpool Corporation | GAS BURNER AND KITCHEN HOB PROVIDED WITH SUCH BURNER. |
-
2009
- 2009-04-17 ES ES200930076A patent/ES2361106B1/en not_active Expired - Fee Related
-
2010
- 2010-04-01 EP EP10158901.8A patent/EP2241822A3/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55152694U (en) * | 1979-04-19 | 1980-11-04 | ||
DE3602666A1 (en) | 1986-01-29 | 1987-07-30 | Wmf Wuerttemberg Metallwaren | Appliance for cooking food |
JPH03122992A (en) * | 1989-10-04 | 1991-05-24 | Matsushita Electric Ind Co Ltd | Induction heting cooking apparatus |
EP1217873A2 (en) * | 2000-12-21 | 2002-06-26 | E.G.O. ELEKTRO-GERÄTEBAU GmbH | Temperature of cooking vessels sensing method and device |
CN2708602Y (en) * | 2004-05-31 | 2005-07-06 | 杨集芳 | Electromagnetic oven panel |
CN2851896Y (en) * | 2005-12-16 | 2006-12-27 | 古宝贵 | Structure improvement of electromagnetic stove |
Also Published As
Publication number | Publication date |
---|---|
EP2241822A3 (en) | 2017-09-13 |
ES2361106B1 (en) | 2012-04-20 |
ES2361106A1 (en) | 2011-06-14 |
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