EP0951202A2 - Plaque de cuisson avec plaque en céramique électriquement conductive - Google Patents

Plaque de cuisson avec plaque en céramique électriquement conductive Download PDF

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Publication number
EP0951202A2
EP0951202A2 EP99107754A EP99107754A EP0951202A2 EP 0951202 A2 EP0951202 A2 EP 0951202A2 EP 99107754 A EP99107754 A EP 99107754A EP 99107754 A EP99107754 A EP 99107754A EP 0951202 A2 EP0951202 A2 EP 0951202A2
Authority
EP
European Patent Office
Prior art keywords
plate
ceramic plate
cooking
layer
electrically conductive
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Withdrawn
Application number
EP99107754A
Other languages
German (de)
English (en)
Other versions
EP0951202A3 (fr
Inventor
Uwe Dipl.-Ing. Has
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
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 BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP0951202A2 publication Critical patent/EP0951202A2/fr
Publication of EP0951202A3 publication Critical patent/EP0951202A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • H05B3/00—Ohmic-resistance heating
    • H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
    • H05B3/22—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible
    • H05B3/26—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor mounted on insulating base
    • H05B3/265—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor mounted on insulating base the insulating base being an inorganic material, e.g. ceramic
    • 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
    • H05B3/00—Ohmic-resistance heating
    • H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates
    • H05B3/74—Non-metallic plates, e.g. vitroceramic, ceramic or glassceramic hobs, also including power or control circuits
    • H05B3/748—Resistive heating elements, i.e. heating elements exposed to the air, e.g. coil wire heater

Definitions

  • the present invention relates to a hotplate with a ceramic plate, the top serves as a shelf for a cooking container to be heated and on the underside thereof an electrically insulating insulator layer is arranged, the underside of which at least an electric heating element is assigned.
  • Such an electric heating plate is known from the publication DE 41 09 569 A1.
  • This heating plate for an electrically operated cooker comprises a cooking surface serving top layer of good heat-conducting, electrically non-conductive or only poorly conductive ceramic material.
  • Below the top layer is an electrically insulating one Enamel layer is provided, on the underside of which a heat conductor arrangement is printed is.
  • the thickness of the electric is not insulating enamel layer or the top layer, but between the Covered layer and the enamel layer arranged a grounded metal plate.
  • a corresponding hotplate made of glass ceramic is known from the document DE 31 05 065 A1 known. There is because of the increasing electrical with increasing temperature Conductivity of the glass ceramic to increase the operational reliability of the hotplate an earthed metallic layer is evaporated on the underside of the glass ceramic plate or sprayed on.
  • DE 195 10 989 A1 describes a component combination for electrical Heating plates known in which an electrical resistance element, an electrical insulating layer and a heat transfer plate are arranged one above the other.
  • the heat transfer plate consists at least partially of a thermal and electrically conductive metal matrix composite (MMC) material.
  • MMC metal matrix composite
  • the object of the present invention is to ensure the safety of a hotplate to improve the preamble of claim 1 with simple means.
  • this is achieved in that the ceramic plate from thermal and electrically conductive material exists, and that the ceramic plate is grounded. So it is dispenses with the previously known solutions, namely to increase the electrical safety of hot plates on a particularly stable and well insulating Insulation layer between the ceramic plate and the heating element or on an additional grounded metal layer between the ceramic hotplate and the insulator layer.
  • the electrical conductivity is particularly simple the ceramic plate itself. If the conductive ceramic plate is due to a Insulation fault to be connected to voltage, the grounding measure known fuse of the hotplate or the household triggered.
  • the thickness of the insulator layer may be less than be about 1 mm. On the one hand, this is completely sufficient for the safety of the hotplate and on the other hand, small layer thicknesses can be realized, which are caused by temperature stress the hotplate is less prone to flaking or jumping off. Furthermore, a thin insulator layer results in less heat loss.
  • the ceramic plate is made of a metal matrix composite (MMC) material.
  • MMC metal matrix composite
  • Such composite ceramics exist, for example from a porous base body made of silicon ceramic, which with a metal, for example Aluminum, is soaked.
  • MMC metal matrix composite
  • its properties can be targeted in terms of mechanical, influence thermal and electrical properties. This will make it, for example possible adaptation of the thermal expansion properties of the ceramic plate or heat transfer plate to achieve that of the insulation material. Especially can make electrical connections to ground the plate during the manufacturing process the ceramic plate can be realized.
  • Other advantageous properties result from the publication DE 195 10 989 A1.
  • the specific electrical resistance of the ceramic plate is at most about 0.35 ⁇ mm 2 / m, which corresponds to that of typical iron.
  • a suitable composition of the composite ceramic enables the electrical conductivity required in the particular circumstances to be specifically implemented.
  • a circular hotplate 1 is provided for insertion into a hob known per se, for example with a glass plate with corresponding circular recesses.
  • the hotplate 1 has a three-layer structure.
  • the uppermost layer is formed by a ceramic plate 3 made of metal matrix composite (MMC) material carrying the cookware
  • the middle layer is an insulator layer 5 made of aluminum oxide (Al 2 O 3 )
  • the bottom layer is formed by a lower heating conductor layer 7 educated.
  • the heating conductor 7 is applied to the underside of the insulator layer 5 by means of printing technology.
  • the thickness of the insulator layer 5 is approximately 0.7 mm.
  • the ceramic plate 3 has a specific electrical resistance of significantly less than 0.35 ⁇ mm 2 / m. In the event of a fault, a fuse of the hotplate 1, which is known per se and is not shown, is triggered during the electrical breakdown from the heating conductor 7 to the ceramic plate 3 as a result of its grounding.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Cookers (AREA)
  • Baking, Grill, Roasting (AREA)
EP99107754A 1998-04-17 1999-04-19 Plaque de cuisson avec plaque en céramique électriquement conductive Withdrawn EP0951202A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19817194 1998-04-17
DE1998117194 DE19817194A1 (de) 1998-04-17 1998-04-17 Kochplatte mit elektrisch leitfähiger Keramikplatte

Publications (2)

Publication Number Publication Date
EP0951202A2 true EP0951202A2 (fr) 1999-10-20
EP0951202A3 EP0951202A3 (fr) 2000-05-10

Family

ID=7864920

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99107754A Withdrawn EP0951202A3 (fr) 1998-04-17 1999-04-19 Plaque de cuisson avec plaque en céramique électriquement conductive

Country Status (2)

Country Link
EP (1) EP0951202A3 (fr)
DE (1) DE19817194A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000015005A1 (fr) * 1998-09-03 2000-03-16 Aktiebolaget Electrolux Film mince chauffant isole
WO2000065876A1 (fr) * 1999-04-21 2000-11-02 Aktiebolaget Electrolux Dispositif chauffant a film mince muni d'une couche barriere
WO2002071804A1 (fr) * 2001-03-06 2002-09-12 Schott Glas Systeme de cuisson ceramique comportant une plaque vitroceramique, une couche d'isolation et des elements chauffants
WO2002071802A1 (fr) * 2001-03-06 2002-09-12 Schott Glas Plaque de cuisson ceramique
WO2003105531A1 (fr) * 2002-06-06 2003-12-18 Schott Glas Systeme de cuisson a plaque vitroceramique chauffee directement
WO2007002861A2 (fr) 2005-06-29 2007-01-04 Watlow Electric Manufacturing Company Surfaces intelligentes de dispositif de chauffage en couches

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10242481C1 (de) * 2002-09-13 2003-12-04 Schott Glas Keramisches Kochsystem und Verfahren zur Herstellung derselben

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2418161A1 (de) * 1974-04-13 1975-10-23 Licentia Gmbh Elektrisch beheizte kochplatte aus keramischen material

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT312759B (de) * 1972-01-19 1974-01-25 Elektra Bregenz Gmbh Einrichtung zum thermischen Behandeln von Koch- und/oder Bratgut
DE3105065A1 (de) * 1981-02-12 1982-08-19 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Kochplatte aus glaskeramik
DE3506946A1 (de) * 1985-02-27 1986-08-28 E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen Elektro-kochplatte
DE4109569A1 (de) * 1991-03-22 1992-09-24 Buchtal Gmbh Elektrische heizplatte
AT408299B (de) * 1994-03-30 2001-10-25 Electrovac Heizvorrichtung für elektrische heizplatten, zündeinrichtungen, temperatursensoren od. dgl.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2418161A1 (de) * 1974-04-13 1975-10-23 Licentia Gmbh Elektrisch beheizte kochplatte aus keramischen material

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000015005A1 (fr) * 1998-09-03 2000-03-16 Aktiebolaget Electrolux Film mince chauffant isole
WO2000065876A1 (fr) * 1999-04-21 2000-11-02 Aktiebolaget Electrolux Dispositif chauffant a film mince muni d'une couche barriere
WO2002071804A1 (fr) * 2001-03-06 2002-09-12 Schott Glas Systeme de cuisson ceramique comportant une plaque vitroceramique, une couche d'isolation et des elements chauffants
WO2002071802A1 (fr) * 2001-03-06 2002-09-12 Schott Glas Plaque de cuisson ceramique
US6921882B2 (en) 2001-03-06 2005-07-26 Schott Ag Ceramic cooktop
WO2003105531A1 (fr) * 2002-06-06 2003-12-18 Schott Glas Systeme de cuisson a plaque vitroceramique chauffee directement
WO2007002861A2 (fr) 2005-06-29 2007-01-04 Watlow Electric Manufacturing Company Surfaces intelligentes de dispositif de chauffage en couches
WO2007002861A3 (fr) * 2005-06-29 2007-07-05 Watlow Electric Mfg Surfaces intelligentes de dispositif de chauffage en couches
US8847121B2 (en) 2005-06-29 2014-09-30 Watlow Electric Manufacturing Company Smart layered heater surfaces

Also Published As

Publication number Publication date
DE19817194A1 (de) 1999-10-21
EP0951202A3 (fr) 2000-05-10

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