EP0711098B1 - Induktionskochgerät - Google Patents

Induktionskochgerät Download PDF

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Publication number
EP0711098B1
EP0711098B1 EP19950402455 EP95402455A EP0711098B1 EP 0711098 B1 EP0711098 B1 EP 0711098B1 EP 19950402455 EP19950402455 EP 19950402455 EP 95402455 A EP95402455 A EP 95402455A EP 0711098 B1 EP0711098 B1 EP 0711098B1
Authority
EP
European Patent Office
Prior art keywords
cooker according
glass
hob
induction
induction heater
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.)
Expired - Lifetime
Application number
EP19950402455
Other languages
English (en)
French (fr)
Other versions
EP0711098A1 (de
Inventor
Jean-Paul Chevrier
Bernard Delhomme
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.)
Europeenne De Fabrication D'enceintes Mi Cie
Brandt Cooking SAC
Brandt Industries SAS
Original Assignee
Compagnie Europeenne pour lEquipement Menager SA
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 Compagnie Europeenne pour lEquipement Menager SA filed Critical Compagnie Europeenne pour lEquipement Menager SA
Publication of EP0711098A1 publication Critical patent/EP0711098A1/de
Application granted granted Critical
Publication of EP0711098B1 publication Critical patent/EP0711098B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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 present invention relates to a cooking appliance with induction, and more specifically relates to the hob fitted to such a apparatus.
  • the hot plates known from said document DE-U-8 914 894 are brought to a relatively high temperature, their edge must be relatively distant (at least 40 mm) from the support surrounding, if the latter is made of plastic.
  • a large cooking container is placed on the hot plate, it communicates by conduction of heat to the support surrounding the plate, which requires either to increase the dimensions of the hot plate (therefore to increase the cost price), or to renounce when using plastic for the support.
  • the preceding advantage is not exploited in the heating by induction fireplace. Indeed, the heating occurring directly at the level of the container placed above the inductor, the rise in temperature of the hob, due to conduction thermal from the container to the plane, does not exceed, in the worst case, 300 to 350 ° C depending on the temperature regulation used.
  • glass ceramic is an expensive material, which strikes almost unnecessarily, given the previous remark, the price of household appliances.
  • the main purpose of the present invention is to find a replacement solution that significantly reduces the costs of a induction cooking appliance.
  • the subject of the present invention is an induction cooking appliance comprising a plate of substantially flat cooking and at least one inducing hearth placed under said plate, said plate being constituted by the assembly of a first part with a hole of size close to the diameter of the hearth inductor and greater than the diameter of the inductor hearth, and second glass part, intended to support a container for heating, said second part completely closing the hole of the first part, characterized in that the first part is obtained by molding of a heat-resistant material, and in that the second part has an upper surface raised relative to the upper surface of the first part.
  • Figure 1 there is shown schematically, in view partial elevation, a container 1 to be heated placed on the plate 2 of a induction cooking appliance with an induction cooker 3.
  • the inducing focus 3 is conventionally composed of one or more several coils placed concentrically.
  • the coils are shaped generally circular and the diameter of the inducing focus should preferably correspond to the diameter of the largest container to be heated, the latter being placed on the baking sheet 2, facing the inductor hearth.
  • the hob has two parts of different materials:
  • a first part 21 has a hole 22 whose size is greater than the diameter of the inducing focal point, so as to leave this focal point fully appear when the first part is put in place.
  • this first part is molded, by injection or by compression, in a heat-resistant material.
  • the material used for molding is a thermoplastic, preferably loaded by mineral particles (glass fibers, silica), in order to avoid molding imperfections.
  • thermosetting which has very high mechanical stability and thermal compared to a thermoplastic material.
  • the hob according to the invention comprises also a second part 20 made of glass, intended to carry the container to heat.
  • This second part is dimensioned at the surface so as to completely cover the hole 22 of the first part 21.
  • the thickness of the second part is determined so as to optimize the heating of the container 1 by induction, the inducing focus being over its entire surface in contact with the lower part of this second part.
  • the glass used can be a conventional glass ceramic. In this case, we reduced the amount of material needed compared to the tables in glass ceramic known, and therefore, the total cost of the device.
  • a glass is used soda-lime, type of glass generally used to make windows.
  • soda-lime glass can advantageously be tempered so as to to improve its resistance to mechanical shock.
  • a temperature control device advantageously can be provided to use a temperature control device avoiding, by adjusting the power of the inducing hearth, that part 20 does not reach temperatures above a certain threshold, typically 320 ° C.
  • Soda-lime and borosilicate glasses are preferable to glass-ceramic because they retain their dielectric characteristics in temperature.
  • the assembly of the two parts 20, 21 must allow good sealing and take into account the different expansion coefficients of the two used materials :
  • the first part 21 has a peripheral shoulder 23 on the periphery of the hole 22, on which comes to rest the second part 20.
  • the two parts are by example assembled by silicone bonding, to ensure a seal maximum.
  • assembly can be carried out through a seal.
  • the upper surface of the second part is raised relative to the upper surface of the first part, for example of the order of 1 millimeter.
  • the bottom of the container is never in contact with the heat-resistant material of the first part.
  • the overall cost of a cooking appliance fitted with alune plate according to the invention is significantly reduced compared to same appliance fitted with a ceramic hob (the induction cooker can be covered with a glass plate 20, much cheaper than the glass-ceramic, and the support 21 can be made of thermoplastic material or thermosetting).
  • the temperature of the plate being lower that in the case of radiant elements, its dimensions can be reduced.
  • the distance between the edges of the inductor hearth 3 and the support 21 can be very small (about 4 mm).
  • the plate 20 exceeds by about 1 mm the level of the support 21, there is no heat exchange between them by conduction (by O the vessels to be heated), which allows the support 21 made of thermosetting or thermoplastic material.
  • the first part being molded functions additional devices such as the control keypad or the air outlet of cooling can be integrated directly, with searches new aesthetics, in particular in terms of volume.
  • Figures 2a to 2f Different geometric configurations are possible, such as show Figures 2a to 2f. (circular, elliptical shapes (Figure 2a) or square (figure 2b) for devices fitted with four induction cookers conventional, or two induction cookers for fish dishes ( Figures 2c to 2 F)).

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Cookers (AREA)
  • Electric Stoves And Ranges (AREA)

Claims (14)

  1. Induktionskochgerät mit einer im wesentlichen ebenen Kochfläche (2) und einer Induktions-Wärmequelle (3) unter der Fläche, wobei diese Fläche aus einem ersten Teil (21) mit einem Loch (22) ähnlicher Abmessungen wie der Durchmesser der Induktions-Wärmequelle (3) und größer als der Durchmesser dieser Wärmequelle (3) sowie aus einem zweiten Teil (20) besteht, das aus Glas ist und einen zu erhitzenden Kochtopf (1) trägt sowie vollständig das Loch im ersten Teil bedeckt, dadurch gekennzeichnet, daß das erste Teil (21) durch Gießen aus einem wärmebeständigen Material hergestellt wird und das zweite Teil (20) eine Oberseite besitzt, die bezüglich der Oberseite des ersten Teils (21) erhöht liegt.
  2. Kochgerät nach Anspruch 1, dadurch gekennzeichnet, daß das wärmebeständige Material ein wärmehärtbares Material ist.
  3. Kochgerät nach Anspruch 1, dadurch gekennzeichnet, daß das wärmebeständige Material ein thermoplastisches Material ist.
  4. Kochgerät nach einem beliebigen der vorstehenden Ansprüche, dadurch gekennzeichnet, daß das zweite Teil aus Glaskeramik ist.
  5. Kochgerät nach einem beliebigen der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das zweite Teil aus Borsilikatglas ist.
  6. Kochgerät nach einem beliebigen der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das zweite Teil aus Calcium-Natrium-Glas ist.
  7. Kochgerät nach Anspruch 6, dadurch gekennzeichnet, daß das Calcium-Natrium-Glas wärmebehandelt ist.
  8. Kochgerät nach Anspruch 7, dadurch gekennzeichnet, daß es eine Vorrichtung zur Temperaturregelung besitzt, mit der die Leistung der Induktionswärmequelle geregelt wird, sodaß das zweite Teil kein Temperatur oberhalb einer vorgegebenen Schwelle erreichen kann.
  9. Kochgerät nach einem beliebigen der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die beiden Teile mit einem Silikonkleber zusammengehalten werden, um eine vollständige Dichtheit zu gewährleisten.
  10. Kochgerät nach einem beliebigen der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die beiden Teile über eine Dichtung zusammengefügt sind.
  11. Kochgerät nach einem beliebigen der vorstehenden Ansprüche, dadurch gekennzeichnet, daß in das erste Teil weiter ein Tastenfeld integriert ist.
  12. Kochgerät nach einem beliebigen der vorstehenden Ansprüche, dadurch gekennzeichnet, daß in das erste Teil außerdem ein Auslaß für Kühlluft integriert ist.
  13. Kochgerät nach einem beliebigen der vorstehenden Ansprüche, dadurch gekennzeichnet, daß das zweite Teil an seiner Oberseite eine um das Loch herum verlaufende Schulter (23) besitzt, auf der der Rand des ersten Teils aufliegt.
  14. Kochgerät nach einem beliebigen der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Oberseite des zweiten Teils über die Oberseite des ersten Teils um mindestens 1 mm vorsteht.
EP19950402455 1994-11-04 1995-11-03 Induktionskochgerät Expired - Lifetime EP0711098B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9413195A FR2726634B1 (fr) 1994-11-04 1994-11-04 Appareil de cuisson a induction
FR9413195 1994-11-04

Publications (2)

Publication Number Publication Date
EP0711098A1 EP0711098A1 (de) 1996-05-08
EP0711098B1 true EP0711098B1 (de) 1999-12-22

Family

ID=9468504

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19950402455 Expired - Lifetime EP0711098B1 (de) 1994-11-04 1995-11-03 Induktionskochgerät

Country Status (3)

Country Link
EP (1) EP0711098B1 (de)
DE (1) DE69514079T2 (de)
FR (1) FR2726634B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007006280A1 (de) * 2007-01-31 2008-08-07 E.G.O. Elektro-Gerätebau GmbH Verfahren zum Aufbau eines Induktionskochfeldes und Induktionskochfeld
DE102008059789A1 (de) * 2008-12-01 2010-06-02 Wamsler Haus- und Küchentechnik GmbH Kochfeld zum Anordnen über einem Wärmeerzeuger
WO2014140388A1 (es) * 2013-03-12 2014-09-18 FARRAS GASSO, Mª Teresa Encimera para equipos de inducción

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3866018A (en) * 1974-04-01 1975-02-11 Gen Electric Molded plastic cooktop with heated glass-ceramic plate insert
DE3440868A1 (de) * 1983-12-19 1985-06-27 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Kochmulde
US4549052A (en) * 1984-01-12 1985-10-22 The Maytag Company Cooling system for an induction cooking cartridge
DE3817438A1 (de) * 1988-05-21 1989-11-30 Schock & Co Gmbh Induktionskochfeld
DE8914894U1 (de) * 1989-12-20 1990-04-05 Bosch-Siemens Hausgeräte GmbH, 8000 München Kochfläche
ES2022003A6 (es) * 1990-03-28 1991-11-16 Balay Sa Sistema de union entre el vidrio ceramico y el marco de fijacion a la encimera.
DE4022846C2 (de) * 1990-07-18 1994-08-11 Schott Glaswerke Vorrichtung zur Leistungssteuerung und -begrenzung bei einer Heizfläche aus Glaskeramik oder einem vergleichbaren Material
FR2681770A1 (fr) * 1991-09-05 1993-04-02 Tecline Plan de travail de cuisine en particulier a usage domestique, muni d'au moins un element de cuisson.

Also Published As

Publication number Publication date
DE69514079T2 (de) 2000-05-25
DE69514079D1 (de) 2000-01-27
FR2726634B1 (fr) 1996-11-29
EP0711098A1 (de) 1996-05-08
FR2726634A1 (fr) 1996-05-10

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