EP0754918A1 - Sensor arrangement for cookers heating elements - Google Patents

Sensor arrangement for cookers heating elements Download PDF

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Publication number
EP0754918A1
EP0754918A1 EP96710007A EP96710007A EP0754918A1 EP 0754918 A1 EP0754918 A1 EP 0754918A1 EP 96710007 A EP96710007 A EP 96710007A EP 96710007 A EP96710007 A EP 96710007A EP 0754918 A1 EP0754918 A1 EP 0754918A1
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EP
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Prior art keywords
sensor arrangement
arrangement according
sensor
monitoring
heat
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Granted
Application number
EP96710007A
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German (de)
French (fr)
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EP0754918B1 (en
Inventor
Günter Dipl.-Ing. Zschau (FH)
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BSH Hausgeraete GmbH
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Individual
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    • 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
    • H05B3/746—Protection, e.g. overheat cutoff, hot plate indicator

Definitions

  • the invention relates to a sensor arrangement for hotplate heating elements, which are either radiant heaters or mass heaters and are connected to cooktop layers, which consist of metallic or non-metallic materials of limited layer thickness.
  • the object of the invention is therefore to create an effective and inexpensive monitoring method against breakage of radiant heaters and cooking surfaces of the type mentioned.
  • the arrangement according to the invention for solving this problem is characterized in that a safety circuit fed by at least one monitoring sensor Turns off radiant heat sources and / or heat conducting heat sources in the event of an accident.
  • An advantageous embodiment of the invention is characterized in that the monitoring sensor is formed from a monitoring conductor track which surrounds the heating source to be monitored. Further advantageous embodiments of the invention are contained in the subclaims. An embodiment of the invention is described below with reference to the drawing.
  • FIG. 1 a heat-conducting plate with a monitoring sensor can be seen, which consists in particular of a heat-conducting carrier 1, a heating medium 2, electrical contacts 3 for the heating medium 2, the monitoring conductor 4, and the voltage supply contacts 7 for the monitoring conductor 4.
  • the associated FIG. 2 shows a cooking surface, for example a glass ceramic cooking surface or glass surface, which is equipped with four individually monitored hotplates according to FIG. 1.
  • the cooking surface 6 has a monitoring path 5 which surrounds all the cooking areas and signals breaks in the vicinity of the cooking area or in the glass ceramic cooking area.
  • the heat sources at risk of breakage for example heat-conducting layer heat sources, are monitored for voltage, overheating and fatigue breaks by the application of at least one monitoring conductor track 4, 5.
  • the monitoring path 4, 5 is connected to a safety circuit which switches off the radiant heat sources and / or heat conducting heat sources in the event of an accident. This usually happens in that the monitoring path 4, 5 is connected to the control circuit of a relay circuit which is connected in series to the respective radiator and switches it off at all poles if the monitoring path 4, 5 is interrupted in the monitoring circuit.
  • the relay for controlling the safety circuit can be connected to a safety extra-low voltage by a separately feeding transformer.
  • the requirements for the surveillance track are that it is sensibly protective is arranged around the heat sources, consists of sufficiently thin material, for example gold, nickel silver, graphite, and is applied by vapor deposition, sputtering or printing.
  • the heating source to be monitored breaks, it can be assumed that the monitoring sensor 4, 5 also interrupts and thus triggers the safety circuit.
  • Both the monitoring sensor or sensors and the heat source structure can be designed in different ways.
  • the structural shape of the heat source to be monitored can be applied in a meandering manner, in spiral circular paths or in concentric circular paths. It makes sense to design the monitoring sensor so that it largely approximates the shape of the respective heat source.
  • an inner and an outer monitoring sensor can be arranged which can switch off different heating circuits if they break, at least one of these several monitoring sensors 4, 5 additionally for pot detection purposes is usable. According to FIG.
  • the arrangement also provides that the monitoring sensor is assigned to each cooking zone of a cooking surface and that the cooking surface itself additionally protects against breakage.
  • the mass-determining electrical non-conductive layer of a silicon compound, for example silicon nitrite or silicon carbide the monitoring sensor must surround the at least one closed heating surface in a sealed manner.
  • heat-conducting plates of the aforementioned type consist in particular in the fact that the heat-conducting sources equipped with carrier materials made of silicon nitrite or silicon carbide have a very short comparison heating time compared to previously known heating sources.
  • the overall efficiency of such special heat-conducting plates is also above 80% and thus significantly higher than previously known heat source arrangements.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Electric Stoves And Ranges (AREA)
  • Resistance Heating (AREA)

Abstract

The sensor device is combined with the cooking field layers made of a metallic or non-metallic material of limited thickness, with at least one monitoring sensor (4) for automatic cut-out of the electric heating source in the case of an accident. Pref. the monitoring sensor defines a surveillance conductor path enclosing the heating source which has is structured in a meandering path, a number of concentric rings, or a spiral.

Description

Die Erfindung bezieht sich auf eine Sensoranordnung für Kochstellenheizelemente, die entweder Strahlungsheizkörper oder Masseheizkörper sind und mit Kochfeldschichten in Verbindung stehen, die aus metallischen oder nichtmetallischen Materialien begrenzter Schichtdicke bestehen.The invention relates to a sensor arrangement for hotplate heating elements, which are either radiant heaters or mass heaters and are connected to cooktop layers, which consist of metallic or non-metallic materials of limited layer thickness.

Kommen Glaskeramik-Kochflächen, Glaskochflächen oder Heizungen, die auf Siliziumbasis des Trägermaterials beruhen zu Bruch, so kann es zu Netzspannungsberührungen der aufgesetzten Metalltöpfe kommen, welche durch die eindringende Feuchtigkeit in die Bruchfläche bedingt ist. Da es bisher ausschließbar war, daß solche Brüche diesbezügliche Folgen haben, erfolgte bei Beschädigung der vorgenannten Platten zunächst keine zwangsläufige Netztrennung. Werden Spezialwärmeleitplatten auf Silizium-Nitrit- bzw. Silizium-Karbitbasis verwendet, und kommt es infolge hoher thermischer Belastung zu Rissen oder Brüchen, so stellt sich dieser Vorgang besonders kritisch dar, da der jeweilige Heizleiter bei dem vorgenannten Trägermaterial entweder direkt aufgedampft bzw. gespattert ist oder beispielsweise als Graphitfolie ebenso direkt anliegt. Durch die begrenzte Dicke der genannten Silizium-Nitrit- bzw. Silizium-Karbitträgerschichten ist bei Bruch derselben mit einer notwendigen Netztrennung zu begegnen, um lebensbedrohliche Situationen infolge Kontaktierung der Netzspannung über Kriechstrecken mit den Topfböden zu verhindern.If glass ceramic cooktops, glass cooktops or heaters based on the silicon of the support material break, the metal pots can come into contact with the mains voltage, which is caused by the moisture penetrating into the broken surface. Since it could previously be ruled out that such breaks had consequences in this way, if the aforementioned plates were damaged, there was initially no inevitable disconnection from the mains. If special heat-conducting plates based on silicon nitrite or silicon carbide are used, and if cracks or breaks occur as a result of high thermal stress, this process is particularly critical, since the respective heating conductor is either directly vapor-deposited or sputtered on the aforementioned carrier material or, for example, also directly as a graphite foil. Due to the limited thickness of the silicon nitride or silicon carbide support layers mentioned, if they break, the necessary network separation must be used to prevent life-threatening situations as a result of contacting the network voltage via creepage distances with the pot bases.

Aufgabe der Erfindung ist es daher, eine wirksame und kostengünstige Überwachungsmethode gegen Bruch von Strahlungsheizkörpern und Kochflächen der genannten Art zu erstellen.The object of the invention is therefore to create an effective and inexpensive monitoring method against breakage of radiant heaters and cooking surfaces of the type mentioned.

Die erfindungsgemäße Anordnung zur Lösung dieser Aufgabe ist dadurch gekennzeichnet, daß eine von mindestens einem Überwachungssensor gespeiste Sicherheitsschaltung Strahlungsheizquellen und/oder Wärmeleitheizquellen in Havariefällen abschaltet. Eine vorteilhafte Ausgestaltung der Erfindung ist dadurch gekennzeichnet, daß der Überwachungssensor aus einer Überwachungsleiterbahn gebildet ist, die die zu überwachende Heizquelle umschließt. Weitere vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen enthalten.
Ein Ausführungsbeispiel nach der Erfindung ist im folgenden anhand der Zeichnung näher beschrieben.The arrangement according to the invention for solving this problem is characterized in that a safety circuit fed by at least one monitoring sensor Turns off radiant heat sources and / or heat conducting heat sources in the event of an accident. An advantageous embodiment of the invention is characterized in that the monitoring sensor is formed from a monitoring conductor track which surrounds the heating source to be monitored. Further advantageous embodiments of the invention are contained in the subclaims.
An embodiment of the invention is described below with reference to the drawing.

Es zeigen

Fig. 1
einen Überwachungssensor auf einer Wärmeleitheiz quelle,
Fig. 2
eine Kochfeldanordnung mit Überwachungssensoren.
Show it
Fig. 1
a monitoring sensor on a heat conducting source,
Fig. 2
a cooktop arrangement with monitoring sensors.

Gemäß Fig.1 ist eine Wärmeleitplatte mit Überwachungssensor erkennbar, die im einzelnen aus einem wärmeleitenden Träger 1, einem Heizmedium 2, aus elektrischen Kontakten 3 für das Heizmedium 2, aus der Überwachungsleiterbahn 4, und den Spannungszuführungskontakten 7 für die Überwachungsleiterbahn 4 besteht. Die zugehörige Fig.2 zeigt eine Kochfläche, beispielsweise Glaskeramik-Kochfläche oder Glasfläche, die mit vier einzeln überwachten Kochstellen gemäß Fig.1 bestückt ist. Die Kochfläche 6 besitzt eine Überwachungsbahn 5, die alle Kochstellen umschließt und Brüche in Umgebung der Kochstelle bzw. in der Glaskeramik-Kochfläche signalisiert. Die bruchgefährdeten Heizquellen, beispielsweise Wärmeleitschichtheizquellen, sind durch das Aufbringen mindestens einer Überwachungsleiterbahn 4, 5 auf Spannungs-, Überhitzungs-, Ermüdungsbrüche hin überwacht. Dabei ist die Überwachungsbahn 4, 5 mit einer Sicherheitsschaltung verbunden, die die Strahlungsheizquellen und/oder Wärmeleitheizquellen in Havariefällen abschaltet. Dies geschieht in der Regel dadurch, daß die Überwachungsbahn 4, 5 mit dem Steuerkreis einer Relaisschaltung verbunden ist, welche in Reihe zu dem jeweiligen Heizkörper geschaltet ist und diese allpolig abschaltet, falls im Überwachungskreis eine Unterbrechung der Überwachungsbahn 4, 5 auftritt. Das Relais für die Steuerung der Sicherheitsschaltung kann dabei mit einer Sicherheitskleinspannung durch einen separat speisenden Transformator verbunden sein. Die Anforderungen an die Überwachungsbahn bestehen darin, daß sie sinnvoll schützend um die Heizquellen angeordnet ist, aus genügend dünnem Material besteht, beispielsweise Gold, Neusilber, Graphit, und durch Aufdampfen, Aufspattern bzw. Aufdrucken aufgebracht ist. Unter diesen Umständen ist es beim Bruch der zu überwachenden Heizquelle als sicher anzunehmen, daß der Überwachungssensor 4, 5 ebenfalls unterbricht und somit die Sicherheitsschaltung auslöst. Sowohl der oder die Überwachungssensoren als auch die Heizquellenstruktur können verschiedenartig ausgeführt sein. Die zu überwachende Heizquelle kann ihrer Strukturform nach meänderartig, in Spiralkreisbahnen oder in konzentrischen Kreisbahnen aufgebracht sein. Es ist sinnvoll, den Überwachungssensor so auszuführen, daß er sich der jeweiligen Heizquellenstrukturform weitgehend annähert. Für spezielle Ausführungsformen der Heizquelle, beispielsweise für geometrisch größere Heizflächen mit entsprechend größerer Gesamtheizleistung, kann ein innerer und ein äußerer Überwachungssensor angeordnet sein, der unterschiedliche Heizkreise abschalten kann, falls sie zu Bruch kommen, wobei mindestens einer dieser mehreren Überwachungssensoren 4, 5 für Topferkennungszwecke zusätzlich nutzbar ist. Gemäß Fig.2 ist außerdem anordnungsmäßig vorgesehen, daß der Überwachungssensor jeder einzelnen Kochstelle einer Kochfläche zugeordnet ist und die Kochfläche selbst ebenso gegen Bruch zusätzlich schützt. Im Fall der Ausführung der Kochstelle als Wärmeleitplatte, deren massebestimmende elektrische nichtleitende Schicht einer Siliziumverbindung, beispielsweise Silizium-Nitrit oder Silizium-Karbit ist, muß der Überwachungssensor die mindestens eine geschlossene Heizfläche dicht umgeben.According to FIG. 1, a heat-conducting plate with a monitoring sensor can be seen, which consists in particular of a heat-conducting carrier 1, a heating medium 2, electrical contacts 3 for the heating medium 2, the monitoring conductor 4, and the voltage supply contacts 7 for the monitoring conductor 4. The associated FIG. 2 shows a cooking surface, for example a glass ceramic cooking surface or glass surface, which is equipped with four individually monitored hotplates according to FIG. 1. The cooking surface 6 has a monitoring path 5 which surrounds all the cooking areas and signals breaks in the vicinity of the cooking area or in the glass ceramic cooking area. The heat sources at risk of breakage, for example heat-conducting layer heat sources, are monitored for voltage, overheating and fatigue breaks by the application of at least one monitoring conductor track 4, 5. The monitoring path 4, 5 is connected to a safety circuit which switches off the radiant heat sources and / or heat conducting heat sources in the event of an accident. This usually happens in that the monitoring path 4, 5 is connected to the control circuit of a relay circuit which is connected in series to the respective radiator and switches it off at all poles if the monitoring path 4, 5 is interrupted in the monitoring circuit. The relay for controlling the safety circuit can be connected to a safety extra-low voltage by a separately feeding transformer. The requirements for the surveillance track are that it is sensibly protective is arranged around the heat sources, consists of sufficiently thin material, for example gold, nickel silver, graphite, and is applied by vapor deposition, sputtering or printing. Under these circumstances, if the heating source to be monitored breaks, it can be assumed that the monitoring sensor 4, 5 also interrupts and thus triggers the safety circuit. Both the monitoring sensor or sensors and the heat source structure can be designed in different ways. The structural shape of the heat source to be monitored can be applied in a meandering manner, in spiral circular paths or in concentric circular paths. It makes sense to design the monitoring sensor so that it largely approximates the shape of the respective heat source. For special embodiments of the heating source, for example for geometrically larger heating surfaces with a correspondingly greater total heating output, an inner and an outer monitoring sensor can be arranged which can switch off different heating circuits if they break, at least one of these several monitoring sensors 4, 5 additionally for pot detection purposes is usable. According to FIG. 2, the arrangement also provides that the monitoring sensor is assigned to each cooking zone of a cooking surface and that the cooking surface itself additionally protects against breakage. In the case of the design of the hotplate as a heat-conducting plate, the mass-determining electrical non-conductive layer of a silicon compound, for example silicon nitrite or silicon carbide, the monitoring sensor must surround the at least one closed heating surface in a sealed manner.

Die Vorteile, die mit Wärmeleitplatten der vorgenannten Art verbunden sind, bestehen insbesondere darin, daß die mit Trägermaterialien aus Silizium-Nitrit bzw. Silizium-Karbit ausgerüsteten Wärmeleitquellen gegenüber bisher bekannten Heizquellen eine sehr kurze Vergleichsankochzeit besitzen. Auch der Gesamtwirkungsgrad solcher spezieller Wärmeleitplatten liegt oberhalb von 80 % und damit deutlich über bisher bekannten Heizquellenanordnungen. Um die möglicherweise bei höheren Energien auftretende Wahrscheinlichkeit eines Erwärmungsbruches zu beherrschen, ist es notwendig, die mit der erfindungsgemäßen Anordnung gegebene Sicherheit mittels Überwachungssensor vorzusehen.The advantages associated with heat-conducting plates of the aforementioned type consist in particular in the fact that the heat-conducting sources equipped with carrier materials made of silicon nitrite or silicon carbide have a very short comparison heating time compared to previously known heating sources. The overall efficiency of such special heat-conducting plates is also above 80% and thus significantly higher than previously known heat source arrangements. In order to control the probability of a heating break occurring at higher energies, it is necessary to provide the security provided by the arrangement according to the invention by means of a monitoring sensor.

Claims (11)

1. Sensoranordnung für Kochstellenheizelemente, die entweder Strahlungsheizkörper oder Masseheizkörper sind und mit Kochfeldschichten in Verbindung stehen, die aus metallischen oder nichtmetallischen Materialien begrenzter Schichtdicke bestehen, dadurch gekennzeichnet, daß eine von mindestens einem Überwachungssensor (4, 5) gespeiste Sicherheitsschaltung Strahlungsheizquellen und/oder Wärmeleitheizquellen in Havariefällen abschaltet.1. Sensor arrangement for hotplate heating elements which are either radiant heaters or mass heaters and are connected to cooktop layers which consist of metallic or non-metallic materials of limited layer thickness, characterized in that a safety circuit fed by at least one monitoring sensor (4, 5) radiant heating sources and / or heat conducting heating sources switches off in the event of an accident. 2. Sensoranordnung nach Anspruch 1, dadurch gekennzeichnet, daß der Überwachungssensor (4, 5) aus einer Überwachungsleiterbahn gebildet ist, die die zu überwachende Heizquelle umschließt.2. Sensor arrangement according to claim 1, characterized in that the monitoring sensor (4, 5) is formed from a monitoring conductor track which surrounds the heating source to be monitored. 3. Sensoranordnung nach Anspruch 1, 2, dadurch gekennzeichnet, daß die zu überwachende Heizquelle ihrer Strukturform nach meänderartig ist.3. Sensor arrangement according to claim 1, 2, characterized in that the heat source to be monitored is me shape-like structure. 4. Sensoranordnung nach Anspruch 1, 2, dadurch gekennzeichnet, daß die zu überwachende Heizquelle ihrer Form nach in konzentrischen Kreisbahnen oder Spiralkreisbahnen strukturiert ist, wobei der mindestens eine Überwachungssensor (4, 5) sich der jeweiligen Heizquellenstruktur annähert.4. Sensor arrangement according to claim 1, 2, characterized in that the heat source to be monitored is structured according to its shape in concentric circular or spiral circular paths, the at least one monitoring sensor (4, 5) approaching the respective heat source structure. 5. Sensoranordnung nach Anspruch 1, dadurch gekennzeichnet, daß für geometrisch und damit leistungsstärkere größere Heizflächen ein innerer und ein äußerer Überwachungssensor angeordnet ist.5. Sensor arrangement according to claim 1, characterized in that an inner and an outer monitoring sensor is arranged for geometrically and thus more powerful larger heating surfaces. 6. Sensoranordnung nach Anspruch 1, 5, dadurch gekennzeichnet, daß der Überwachungssensor (4, 5) für Topferkennungszwecke nutzbar ist.6. Sensor arrangement according to claim 1, 5, characterized in that the monitoring sensor (4, 5) can be used for pot detection purposes. 7. Sensoranordnung nach Anspruch 1, dadurch gekennzeichnet, daß der Überwachungssensor (4, 5) für bruchgefährdete Kochfeldanordnungen angepaßt ist.7. Sensor arrangement according to claim 1, characterized in that the monitoring sensor (4, 5) is adapted for hob arrangements at risk of breakage. 8. Sensoranordnung nach Anspruch 1 oder 7, dadurch gekennzeichnet, daß der Überwachungssensor (4, 5) jeder einzelnen Kochstelle einer Kochfläche und dieser selbst zuordenbar ist.8. Sensor arrangement according to claim 1 or 7, characterized in that the monitoring sensor (4, 5) each cooking area of a cooking surface and this can be assigned itself. 10. Sensoranordnung nach Anspruch 1, dadurch gekennzeichnet, daß die Kochstelle eine Wärmeleitplatte ist, deren massebestimmende elektrische nichtleitende Schicht eine Siliziumverbindung ist.10. Sensor arrangement according to claim 1, characterized in that the hotplate is a heat-conducting plate, the mass-determining electrical non-conductive layer is a silicon compound. 11. Sensoranordnung nach Anspruch 1, 9, dadurch gekennzeichnet, daß die Kochstelle eine Wärmeleitplatte ist, deren massebestimmende elektrisch nichtleitende Schicht aus Silizium-Nitrit besteht.11. Sensor arrangement according to claim 1, 9, characterized in that the hotplate is a heat-conducting plate, the mass-determining electrically non-conductive layer consists of silicon nitride. 12. Sensoranordnung nach Anspruch 1, dadurch gekennzeichnet, daß die Kochstelle eine Wärmeleitplatte ist, deren massebestimmende elektrisch nichtleitende Schicht aus Silizium-Karbit besteht.12. Sensor arrangement according to claim 1, characterized in that the hotplate is a heat-conducting plate whose mass-determining electrically non-conductive layer consists of silicon carbide.
EP96710007A 1995-07-20 1996-07-03 Cooking hob with a sensor arrangement for cooker heating elements. Expired - Lifetime EP0754918B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29511740U DE29511740U1 (en) 1995-07-20 1995-07-20 Sensor arrangement for hotplate heating elements
DE29511740U 1995-07-20

Publications (2)

Publication Number Publication Date
EP0754918A1 true EP0754918A1 (en) 1997-01-22
EP0754918B1 EP0754918B1 (en) 2000-09-20

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ID=8010784

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EP96710007A Expired - Lifetime EP0754918B1 (en) 1995-07-20 1996-07-03 Cooking hob with a sensor arrangement for cooker heating elements.

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EP (1) EP0754918B1 (en)
DE (2) DE29511740U1 (en)
ES (1) ES2151648T3 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19820108A1 (en) * 1998-05-06 1999-12-02 Schott Glas Heat conducting ceramic support fitted with a heating element
DE19853388A1 (en) * 1998-11-19 2000-05-25 Ego Elektro Geraetebau Gmbh Electric heater, especially cooker hot plate, has ceramic bearer, electrical heating element on underside bounded by contact track attached to bearer and connected to protective arrangement

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19629155C2 (en) * 1996-07-19 2001-06-07 Ggt Ges Fuer Gerontotechnik Mb Method and device for safety shutdown of electrical cooking appliances

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4286377A (en) * 1978-07-03 1981-09-01 General Electric Company Method of manufacture for a resistance heater and temperature sensor
DE3105065A1 (en) * 1981-02-12 1982-08-19 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Glass-ceramic hotplate
DE3345991A1 (en) * 1983-12-20 1985-06-27 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Arrangement for the power regulation of electrical cooking plates, preferably glass-ceramic cooking plates
US4833288A (en) * 1987-01-13 1989-05-23 Cableco Induction-heated electric hob having support with indicia

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4286377A (en) * 1978-07-03 1981-09-01 General Electric Company Method of manufacture for a resistance heater and temperature sensor
DE3105065A1 (en) * 1981-02-12 1982-08-19 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Glass-ceramic hotplate
DE3345991A1 (en) * 1983-12-20 1985-06-27 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Arrangement for the power regulation of electrical cooking plates, preferably glass-ceramic cooking plates
US4833288A (en) * 1987-01-13 1989-05-23 Cableco Induction-heated electric hob having support with indicia

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19820108A1 (en) * 1998-05-06 1999-12-02 Schott Glas Heat conducting ceramic support fitted with a heating element
DE19820108C2 (en) * 1998-05-06 2001-03-15 Schott Glas Arrangement of a heat-conducting ceramic carrier with a heating element as a cooking zone in a recess in a cooking surface
DE19853388A1 (en) * 1998-11-19 2000-05-25 Ego Elektro Geraetebau Gmbh Electric heater, especially cooker hot plate, has ceramic bearer, electrical heating element on underside bounded by contact track attached to bearer and connected to protective arrangement

Also Published As

Publication number Publication date
ES2151648T3 (en) 2001-01-01
DE29511740U1 (en) 1995-10-05
EP0754918B1 (en) 2000-09-20
DE59605907D1 (en) 2000-10-26

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