EP0438656B1 - Plaque de cuisson - Google Patents

Plaque de cuisson Download PDF

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Publication number
EP0438656B1
EP0438656B1 EP90122087A EP90122087A EP0438656B1 EP 0438656 B1 EP0438656 B1 EP 0438656B1 EP 90122087 A EP90122087 A EP 90122087A EP 90122087 A EP90122087 A EP 90122087A EP 0438656 B1 EP0438656 B1 EP 0438656B1
Authority
EP
European Patent Office
Prior art keywords
carrier
cooking field
field according
luminous organ
luminous
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
EP90122087A
Other languages
German (de)
English (en)
Other versions
EP0438656A2 (fr
EP0438656A3 (en
Inventor
Julius Dipl.-Ing. Husslein
Heinrich Detterbeck
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.)
BOSCH-SIEMENS HAUSGERAETE GMBH
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0438656A2 publication Critical patent/EP0438656A2/fr
Publication of EP0438656A3 publication Critical patent/EP0438656A3/de
Application granted granted Critical
Publication of EP0438656B1 publication Critical patent/EP0438656B1/fr
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
    • 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
    • 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
    • H05B2213/00—Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
    • H05B2213/04—Heating plates with overheat protection means

Definitions

  • the invention relates to a hob according to claim 1
  • a device for the so-called residual heat indicator is provided in the form of a temperature-dependent switch which is used to control a light or signal element.
  • a cooktop with a glass ceramic plate outside the shelf e.g. for a pot, under which shelf a radiant heater is located, is an essentially ring-shaped light guide at a distance to limit the space below the glass ceramic plate, which is also located outside the space.
  • Light source is optically coupled.
  • the invention is based, to improve the recognizability and assignment of the lighting elements in relation to the individual surfaces of the carrier and beyond the construction of the entire lighting device the task.
  • the lighting element Due to the geometric inclusion of the lighting element in the associated footprint, an optimal recognizability and assignability of the lighting element in relation to the footprint is obtained and it is made clear to the user of the hob that just at the point where the lighting element is located and indicates an increased residual heat Avoid touching the hand as much as possible.
  • the special arrangement and placement of the lighting element within the footprint prevents this lighting element from being damaged and destroyed as a result of the high thermal energy emanating from the heating element in the area within the footprint.
  • the assigned footprint is optically identified by the lighting element and the exact placement of the cooking vessel on this footprint is facilitated, in particular when the lighting element directly identifies the outer periphery of the heated footprint.
  • the luminous element is designed as an elongated light guide which is optically connected to a single light source.
  • a light guide other lighting elements, such as incandescent or glow lamps, can also be provided, which are connected to a single electrical voltage source.
  • this is the case with such a hob, eg glass ceramic hob already provided safety temperature limiter component used as an electrical connection element in that this component is provided in a simple manner in an additional electrical contact pair or serves as a carrier for a light source for the light guide.
  • FIG. 1 shows a partially transparent support 1 made of glass ceramic material, on which cooking vessels can be placed for the purpose of heating.
  • An infrared radiation heater 2 is arranged underneath the footprint of the hob, which is characterized by printing on the support 1, and consists in a manner known per se of a pot-shaped, metallic jacket, a thermal insulation 4 arranged therein and heating windings 5 carried by this insulation an electrical power network can be connected, as indicated in Fig. 2.
  • FIGS. 1 and 2 two different variants of this embodiment are shown in FIGS. 1 and 2 to the left and right of the central plane in relation to the lighting device explained below (residual heat indicator).
  • the wall of the aforementioned recess forms a reflector for the light coming from the glow lamp 8, which is thrown in the direction of the carrier 1 in a concentrated manner.
  • an incandescent lamp 12 is provided instead of a glow lamp 8 as a luminous element with an incandescent filament or filament surrounded by a glass tube, which incandescent lamp 12 is also ring-shaped and also lies in the recess 7 of the insulating material carrier 4.
  • the annular light-emitting element serves not only as a so-called residual heat indicator, that is to say for the optical display of the heating of the carrier 1 which exceeds a predetermined temperature which is permissible for contact, the control of this light-emitting element taking place in a manner known per se by means of a temperature-dependent switch, e.g. by means of a further path of the safety temperature limiter 9, but also represents an optical marking of the ring-shaped footprint of the hob.
  • an electrically conductive metal strip 17 is provided as a luminous element for the residual heat indicator and for the identification of the footprint of the support 1, which is in the vertical wall 6 of the insulating material support 4 with a flush finish to the wall end and to the partially transparent support in Insulating material is embedded and in turn is electrically connected to contacts of the safety temperature limiter 9.
  • the metal strip has consecutive points 18 with a constant spacing Cross-section and increased electrical resistance, at which points a glow and thus lighting effect occurs when an electrical voltage is applied. These cross-sectionally reduced locations 18 thus form line-shaped luminous surfaces along the metal strip 17.
  • a luminous element which again surrounds the footprint of the support 1 in a ring, is formed by small glow lamps 19, which are embedded in corresponding, hole-shaped recesses 20 of the insulating material carrier 4 and protrude into the area in the area of upper, funnel-shaped recesses 21.
  • This large number of small glow lamps 19 can be connected in series with one another to a power source, e.g. of the safety temperature limiter 9.
  • the standing or heating surface of the hob of the glass-ceramic carrier is delimited by an annular marking 23 printed on the carrier 1, which is in a widened region 25 and / or in a region with a continuous width 24 has unprinted area 26, which preferably faces the operating front of the hob.
  • the marking or the position print 23 is interrupted by an unprinted, circular point 27. Below the above-mentioned positions 26 and 27 there are again light elements in round or elongated form, as explained analogously above. Illuminated surfaces are thus created here, which are included in the position printing of the glass ceramic plate 1.
  • the lighting element for example in the form of an elongated or round lamp, for example a glow lamp
  • the sensor 10 of which in turn radially overlaps the footprint extends.
  • the luminous element denoted for example by 8, for example in the form of a glow lamp, is mounted on the top of the safety temperature limiter module 9, for example with a reflector as the base, as shown in FIG. 10.
  • the safety temperature limiter 9 has a contact 28 of a temperature-dependent switch, or a second control path of the safety temperature limiter, which is adjusted according to the requirements of the "residual heat indicator" function for the control of the lighting element 8.
  • the contact 29 assigned to the “safety temperature limiter” function is indicated.
  • the lighting element is included in the position marking 23 with the width a.
  • a light guide 30 or 30 ′ is provided as the signal element, which extends radially from the outside of the footprint to the center of the footprint.
  • the light guide is arranged above the heating windings 5 of the radiant heater 2 directly below the carrier 1. Outside the jacket 3 of the radiant heater 2, it has an opening 31 for introducing a light emitter in the form of a lamp 32 and in the center a circular, enlarged, and with a reflection corrugation corresponding to FIG. 18, large luminous surface 33 and in the course of the light guide 30 several successive ones Reflection notches or reflection recesses 34. As shown in FIG.
  • this light guide is located in an at least largely unheated area above the heating windings 5, namely where the reversal points of the heating windings are located.
  • the lamp 32 is in electrical connection with the safety temperature limiter 9.
  • a light guide 30 ' can also be provided below the radiant heater 2, which is also connected to a lamp and extends to the center of the footprint.
  • the pot-shaped jacket 3 has an opening 35 formed by a through-hole, through which the light field, again formed in the center, is optically recognizable from above the support when the residual heat indicator signals an excess temperature.
  • the luminous element of the residual heat indicator is structurally connected to the sensor 10 of the safety temperature limiter 9, which sensor 10 extends radially over the footprint of the glass-ceramic carrier 1.
  • the sensor 10 of the safety temperature limiter 9 is formed by a glass tube 36, in which there is an expansion rod 37 in a known manner, which, in order to protect the glass ceramic carrier 1, senses its temperature and, when reaching unsafe temperatures, appropriate switching measures in the safety temperature limiter 9 causes.
  • the sensor 10 is surrounded by a further, transparent glass protective tube 38, a light-emitting element in the form of an elongated filament or band 39 being arranged in the cavity between the two glass tubes 36 and 38, for example, applied to the outer surface of the inner glass tube 36, as shown in FIG. 16 is.
  • This glow wire or the glow band 39 is preferably larger in cross section on the side facing the carrier 1 than below the glass tube 36 in the region of the return line of the electrical conductor. As illustrated in FIG. 2, the filament 39 can also be wound onto the inner glass tube 36. This glow wire is in turn electrically connected to contacts of the safety temperature limiter.
  • a band-like light guide 40 is arranged parallel to the sensor 10 of the safety temperature limiter 9 and e.g. appropriately mechanically coupled to the sensor 10.
  • This light guide in turn has light-reflecting corrugations 41 or the like along its longitudinal extent and is in turn in optical connection with a lamp 32 which is held in the safety temperature limiter 9 and is electrically connected.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Electric Stoves And Ranges (AREA)
  • Resistance Heating (AREA)
  • Baking, Grill, Roasting (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • Cookers (AREA)
  • Surgical Instruments (AREA)

Claims (13)

  1. Plaque de cuisson comportant un support au moins partiellement transparent en verre ou en vitrocérame, des dispositifs de chauffage à rayonnement (2) disposés au-dessous de ce support au voisinage de surfaces d'appui du support, et un dispositif d'éclairement pour signaler optiquement un échauffement du support dépassant une température prédéterminée admissible pour un contact, à l'aide d'un interrupteur qui dépend de la température et est couplé thermiquement au support, et un élément d'éclairement commandé par cet interrupteur, l'élément d'éclairement (8,17,19,30,39,40) étant disposé au voisinage du dispositif de chauffage à rayonnement en un emplacement au moins dans une large mesure non chauffé et à l'intérieur ou sur la périphérie de la surface d'appui.
  2. Plaque de cuisson selon la revendication 1, caractérisée en ce que l'élément d'éclairement est monté dans un ou plusieurs évidements (7), ouverts en direction du support, d'un support en matériau isolant en forme de cuvette (4), qui supporte l'élément chauffant (5), de préférence dans la paroi (6) de ce support.
  3. Plaque de cuisson selon l'une des revendications précédentes, caractérisée en ce que l'élément d'éclairement (8) est inséré conjointement dans une zone de marquage (23) du support (1), qui caractérise la périphérie de la surface d'appui, de préférence au niveau d'un emplacement d'interruption (26,27) de la zone de marquage.
  4. Plaque de cuisson selon la revendication 1, caractérisée en ce que l'élément d'éclairement est disposé en tant que surface éclairante (33,35) au centre de la surface d'appui, qui ne comporte pas de filament de chauffage.
  5. Plaque de cuisson selon la revendication 1, caractérisée en ce que le guide de lumière (30) est disposé dans la zone située entre un élément de chauffage à rayonnement (5) et le support (1) au niveau d'une zone, ne comportant pas de filament de chauffage, de l'élément de chauffage à rayonnement (5) ou au-dessous de l'élément de chauffage à rayonnement.
  6. Plaque de cuisson selon la revendication 1 ou 5, caractérisée en ce que la plaque de cuisson est traversée de préférence radialement par un capteur de température en forme de tige (10), qui est disposé dans un tube de protection (36), d'un dispositif (9) de limitation à une température de sécurité, et que l'élément d'éclairement est disposé le long de ce capteur de température dans la zone située entre ce dernier et le support (1).
  7. Plaque de cuisson selon la revendication 6, caractérisée en ce que le tube de protection (36) du capteur de température (10) est entouré par un autre tube de protection transparent (38), et que l'élément d'éclairement est disposé entre le tube de protection, sur le côté tourné vers le support (1), sous la forme d'un fil incandescent allongé ou d'une bande incandescente allongée (39) ou sous la forme d'un filament incandescent enroulé sur le tube intérieur de protection (36).
  8. Plaque de cuisson selon l'une des revendications précédentes, caractérisée en ce qu'il est prévu comme élément d'éclairement, un guide de lumière allongé (40).
  9. Plaque de cuisson selon l'une des revendications précédentes, caractérisée en ce que le dispositif (9) de limitation à une température de sécurité, de préférence à plusieurs voies, est prévu en tant qu'élément de support et élément de raccordement électrique pour la source de lumière du guide de lumière ou pour un autre élément d'éclairement.
  10. Plaque de cuisson selon l'une des revendications précédentes, caractérisée en ce que l'élément d'éclairement est formé par un certain nombre de lampes à incandescence ou de lampes fluorescentes électriques (19), qui sont disposées à la suite les unes des autres à une certaine distance réciproque.
  11. Plaque de cuisson selon l'une des revendications 1 à 9, caractérisée en ce que l'élément d'éclairement est formé par une bande métallique (17), qui est raccordée à une source de courant, de préférence une source de courant basse tension, et possède des zones (18) qui sont disposées à la suite les unes des autres à une certaine distance réciproque et représentent les surfaces d'éclairement possédant une section transversale réduite et une résistance électrique accrue.
  12. Plaque de cuisson selon l'une des revendications 1 à 9, caractérisée en ce que l'élément d'éclairement est formé par une lampe électrique allongée (8,12).
  13. Plaque de cuisson selon l'une des revendications 1 à 9, caractérisée en ce que l'élément d'éclairement est formé par un fil incandescent allongé ou hélicoïdal (39) disposé dans un tube de protection transparent (38) et-qui est raccordé à une source de courant, de préférence une source de courant basse tension.
EP90122087A 1990-01-26 1990-11-19 Plaque de cuisson Expired - Lifetime EP0438656B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4002322A DE4002322A1 (de) 1990-01-26 1990-01-26 Kochfeld
DE4002322 1990-01-26

Publications (3)

Publication Number Publication Date
EP0438656A2 EP0438656A2 (fr) 1991-07-31
EP0438656A3 EP0438656A3 (en) 1992-04-15
EP0438656B1 true EP0438656B1 (fr) 1996-01-24

Family

ID=6398859

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90122087A Expired - Lifetime EP0438656B1 (fr) 1990-01-26 1990-11-19 Plaque de cuisson

Country Status (6)

Country Link
US (2) US5138135A (fr)
EP (1) EP0438656B1 (fr)
JP (1) JPH04212317A (fr)
AT (1) ATE133530T1 (fr)
DE (2) DE4002322A1 (fr)
ES (1) ES2084634T3 (fr)

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DE102006027739A1 (de) * 2006-06-16 2007-12-20 Schott Ag Kochfeld mit einer Glaskeramikplatte als Kochfeld
EP3603337B1 (fr) * 2017-03-28 2023-10-25 BSH Hausgeräte GmbH Dispositif pour appareil de cuisson et procédé de fabrication d'un dispositif pour appareil de cuisson

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EP2827064B1 (fr) 2013-07-16 2021-06-02 Schott Ag Appareil de cuisson doté d'éléments d'éclairage
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Publication number Priority date Publication date Assignee Title
DE102006027739A1 (de) * 2006-06-16 2007-12-20 Schott Ag Kochfeld mit einer Glaskeramikplatte als Kochfeld
DE102006027739B4 (de) * 2006-06-16 2008-05-29 Schott Ag Kochfeld mit einer Glaskeramikplatte als Kochfläche
EP3603337B1 (fr) * 2017-03-28 2023-10-25 BSH Hausgeräte GmbH Dispositif pour appareil de cuisson et procédé de fabrication d'un dispositif pour appareil de cuisson

Also Published As

Publication number Publication date
US5448036A (en) 1995-09-05
ATE133530T1 (de) 1996-02-15
ES2084634T3 (es) 1996-05-16
EP0438656A2 (fr) 1991-07-31
DE4002322A1 (de) 1991-08-01
DE59010089D1 (de) 1996-03-07
US5138135A (en) 1992-08-11
EP0438656A3 (en) 1992-04-15
JPH04212317A (ja) 1992-08-03

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