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WO2000065875A1 - Procede de fabrication d'elements chauffants pour plaques vitro-ceramiques; element chauffant ainsi obtenu - Google Patents

Procede de fabrication d'elements chauffants pour plaques vitro-ceramiques; element chauffant ainsi obtenu Download PDF

Info

Publication number
WO2000065875A1
WO2000065875A1 PCT/EP2000/003461 EP0003461W WO0065875A1 WO 2000065875 A1 WO2000065875 A1 WO 2000065875A1 EP 0003461 W EP0003461 W EP 0003461W WO 0065875 A1 WO0065875 A1 WO 0065875A1
Authority
WO
WIPO (PCT)
Prior art keywords
strip
forming
channel
heating element
heat
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.)
Ceased
Application number
PCT/EP2000/003461
Other languages
English (en)
Inventor
Josef Vallet
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.)
IRCA SpA Industria Resistenze Corazzate e Affini
Original Assignee
IRCA SpA Industria Resistenze Corazzate e Affini
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 IRCA SpA Industria Resistenze Corazzate e Affini filed Critical IRCA SpA Industria Resistenze Corazzate e Affini
Priority to AU53921/00A priority Critical patent/AU5392100A/en
Publication of WO2000065875A1 publication Critical patent/WO2000065875A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • H05B3/68—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

  • This invention relates to a method for forming heating elements for glass ceramic cooking hobs, and a heating element obtained by the method. Heating elements for glass ceramic cooking hobs are well known.
  • These heating elements generally consists of a metal container internally housing a heat-resistant dielectric body provided with a mixed-line channel containing a resistive wire or an edgewise-inserted resistive strip with a thickness of between 0.05 and 0.1 mm and a width of between 2 and 4 mm.
  • the resistive strip On its outside the resistive strip generally comprises retention clips for its fixing to the base of the heating element which houses it.
  • An object of the invention is to provide a heating element for glass ceramic cooking hobs in which the resistive element is freely housed within the channels.
  • Figures 1-4 show different geometrical shapes of the resistive plate
  • Figure 5 show a strip housed in the refractory disc
  • Figure 6 is a cross-section through the disc on the line VI-VI of 5
  • FIG. 7-12 show different strip profiles
  • FIG 13 shows in detail the strip end to which the mains supply cables are connected
  • Figures 14-17 show different elements for locking the strip in the channels.
  • the method of the invention comprises a first stage in which a resistive strip 2 of any desired geometrical shape is formed from a thin metal sheet by punching or by acid incision.
  • a resistive strip 2 of any desired geometrical shape is formed from a thin metal sheet by punching or by acid incision.
  • the various geometrical shapes are shown in Figures 1 to 4, Figure 1 showing two resistive elements 2, 2' which can be formed separately, whereas Figures 2, 3 and 4 show a strip 2 formed in one piece.
  • the strip 2 can have a cross-section in the shape of a inverted V (see Figure 7), a curve with its concavity facing upwards (see Figure 8), a curve with its concavity facing downwards (see Figure 9), an inverted V with find (see Figure 10), a U (see Figure 10), or a zig-zag (see Figure 12).
  • a heat-resistant dielectric body 4 is formed separately.
  • This body is substantially in the shape of a cylindrical disc, which is positioned in a metal container 6 and is provided on its upper surface with a plurality of ribs 8 defining a channel 10 corresponding substantially to the geometrical development of the strip 2.
  • the distance between the parallel ribs 8 is greater than the width of the strip 2.
  • the resistive strip 2 is then positioned freely within said channels such as to enable it to move freely. This freedom of movement ensures that during the heating and consequent expansion of the strip, this does not curve and deform to hence rest against the walls.
  • bars 12 formed from steatite or similar materials extend transversely above the channels and rest with their ends on the perimetral edge 14 of the heating body.
  • a heat-sensitive element 18 is provided in a position above said strip, and then entire assembly is closed by a glass plate 20.
  • the bars are positioned triangularly above the open parts of the channels.
  • retention staples 16 are shown, to be driven into the insulating base spaced apart from each other above the strip to prevent this escaping from the channels.
  • the elements 18 enable the strip to expand but not to rise.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Surface Treatment Of Glass (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
  • Electric Stoves And Ranges (AREA)
  • Resistance Heating (AREA)

Abstract

Cette invention concerne un procédé de fabrication d'éléments chauffants pour plaques vitro-céramiques qui englobe les opérations suivantes: réalisation d'une lame de résistance selon un dessin déterminé à partir d'une mince tôle métallique, fabrication d'un disque en matériau diélectrique résistant à la chaleur dont les nervures définissent au moins une rainure et dont le dessin correspond à celui de la lame de résistance, emboîtement lâche de ladite lame dans ladite rainure, mise en place du disque dans un boîtier métallique; et fermeture de ce boîtier au moyen d'une plaque de verre.
PCT/EP2000/003461 1999-04-23 2000-04-17 Procede de fabrication d'elements chauffants pour plaques vitro-ceramiques; element chauffant ainsi obtenu Ceased WO2000065875A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU53921/00A AU5392100A (en) 1999-04-23 2000-04-17 Methods for forming heating elements for glass ceramic cooking hobs, and heatingelement obtained by the method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITVE99A000016 1999-04-23
IT1999VE000016A IT1311785B1 (it) 1999-04-23 1999-04-23 Procedimento di realizzazione di elementi riscaldanti per piani dicottura in vetroceramica ed elemento riscaldante ottenuto con il

Publications (1)

Publication Number Publication Date
WO2000065875A1 true WO2000065875A1 (fr) 2000-11-02

Family

ID=11424435

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2000/003461 Ceased WO2000065875A1 (fr) 1999-04-23 2000-04-17 Procede de fabrication d'elements chauffants pour plaques vitro-ceramiques; element chauffant ainsi obtenu

Country Status (3)

Country Link
AU (1) AU5392100A (fr)
IT (1) IT1311785B1 (fr)
WO (1) WO2000065875A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005055663A1 (fr) * 2003-12-02 2005-06-16 Schott Ag Dispositif de chauffage, notamment plaque de cuisson en ceramique, et procede pour produire un tel dispositif
DE102004024044A1 (de) * 2004-05-07 2005-11-24 E.G.O. Elektro-Gerätebau GmbH Elektrischer Heizleiter aus Keramik und Verfahren zu seiner Herstellung sowie Heizeinrichtung
DE102004023483A1 (de) * 2004-05-07 2005-12-01 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Heizelement für elektrische Strahlungsheizkörper
EP2943044A1 (fr) * 2014-05-06 2015-11-11 BSH Hausgeräte GmbH Élément thermique d'appareil de cuisson et appareil de cuisson, en particulier table de cuisson
DE102017201765A1 (de) * 2017-02-03 2018-08-09 E.G.O. Elektro-Gerätebau GmbH Heizeinrichtung, Kochgerät und Verfahren zur Herstellung einer solchen Heizeinrichtung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1714175A (en) * 1927-08-29 1929-05-21 Cribben & Sexton Company Electric cooking plate
GB2293952A (en) * 1994-10-05 1996-04-10 Redring Electric Ltd A heating unit for a ceramic hob
DE19610874A1 (de) * 1996-03-20 1997-09-25 Ako Werke Gmbh & Co Isolierformteil, gepreßt aus Dämmstoffmaterial
DE29808301U1 (de) * 1997-05-08 1998-07-23 Ceramaspeed Ltd., Droitwich, Worcestershire Elektrische Strahlungsheizung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1714175A (en) * 1927-08-29 1929-05-21 Cribben & Sexton Company Electric cooking plate
GB2293952A (en) * 1994-10-05 1996-04-10 Redring Electric Ltd A heating unit for a ceramic hob
DE19610874A1 (de) * 1996-03-20 1997-09-25 Ako Werke Gmbh & Co Isolierformteil, gepreßt aus Dämmstoffmaterial
DE29808301U1 (de) * 1997-05-08 1998-07-23 Ceramaspeed Ltd., Droitwich, Worcestershire Elektrische Strahlungsheizung

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005055663A1 (fr) * 2003-12-02 2005-06-16 Schott Ag Dispositif de chauffage, notamment plaque de cuisson en ceramique, et procede pour produire un tel dispositif
DE102004024044A1 (de) * 2004-05-07 2005-11-24 E.G.O. Elektro-Gerätebau GmbH Elektrischer Heizleiter aus Keramik und Verfahren zu seiner Herstellung sowie Heizeinrichtung
DE102004023483A1 (de) * 2004-05-07 2005-12-01 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Heizelement für elektrische Strahlungsheizkörper
DE102004023483B4 (de) * 2004-05-07 2009-08-06 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Keramisches Heizelement für elektrische Strahlungsheizkörper
EP2943044A1 (fr) * 2014-05-06 2015-11-11 BSH Hausgeräte GmbH Élément thermique d'appareil de cuisson et appareil de cuisson, en particulier table de cuisson
DE102017201765A1 (de) * 2017-02-03 2018-08-09 E.G.O. Elektro-Gerätebau GmbH Heizeinrichtung, Kochgerät und Verfahren zur Herstellung einer solchen Heizeinrichtung
DE102017201765B4 (de) 2017-02-03 2023-07-06 E.G.O. Elektro-Gerätebau GmbH Heizeinrichtung, Kochgerät und Verfahren zur Herstellung einer solchen Heizeinrichtung

Also Published As

Publication number Publication date
ITVE990016A0 (it) 1999-04-23
IT1311785B1 (it) 2002-03-19
ITVE990016A1 (it) 2000-10-23
AU5392100A (en) 2000-11-10

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