EP0471171A2 - Dispositif pour la régulation et le limitation de la puissance d'une surface de chauffage en céramique ou un matériau similaire - Google Patents

Dispositif pour la régulation et le limitation de la puissance d'une surface de chauffage en céramique ou un matériau similaire Download PDF

Info

Publication number
EP0471171A2
EP0471171A2 EP91110463A EP91110463A EP0471171A2 EP 0471171 A2 EP0471171 A2 EP 0471171A2 EP 91110463 A EP91110463 A EP 91110463A EP 91110463 A EP91110463 A EP 91110463A EP 0471171 A2 EP0471171 A2 EP 0471171A2
Authority
EP
European Patent Office
Prior art keywords
heating
temperature
glass ceramic
zone
heating elements
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.)
Granted
Application number
EP91110463A
Other languages
German (de)
English (en)
Other versions
EP0471171B1 (fr
EP0471171A3 (en
Inventor
Bernd Schultheis
Klaus Kristen
Martin Taplan
Herwig Scheidler
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.)
Schott AG
Carl Zeiss AG
Original Assignee
Carl Zeiss AG
Schott Glaswerke AG
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 Carl Zeiss AG, Schott Glaswerke AG filed Critical Carl Zeiss AG
Publication of EP0471171A2 publication Critical patent/EP0471171A2/fr
Publication of EP0471171A3 publication Critical patent/EP0471171A3/de
Application granted granted Critical
Publication of EP0471171B1 publication Critical patent/EP0471171B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • H05B3/746—Protection, e.g. overheat cutoff, hot plate indicator
    • 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
    • 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
    • H05B2213/05—Heating plates with pan detection means
    • 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
    • H05B2213/07—Heating plates with temperature control means

Definitions

  • the invention relates to a method for power control and limitation in a heating surface made of glass ceramic or a comparable material, in particular a glass ceramic cooking surface, the individual heating zones of the heating surface being heated in a manner known per se with heating devices with a plurality of independently switchable and controllable heating elements.
  • the invention further relates to a preferred device for carrying out the method in a hob with a glass ceramic hob.
  • Heating surfaces made of glass ceramic or a comparable material are also used, for example, as wall or ceiling radiators, heat exchangers or other large-area heating devices which can be heated in any way.
  • the heating power for the heating devices is set permanently by the user or electronically, electromechanically or, in the case of gas stoves, by means of a selectable time program via valves, purely mechanically controlled.
  • Corresponding controls are described for example in the patent specification DE-PS 3 639 186 A1.
  • DE-OS 33 14 501 A 1 describes a heating plate with two concentric heating circuits, in which the outer heating circuit is designed as an auxiliary heating circuit.
  • DE-PS 34 06 604 relates to a heating device in which the heating zone is heated by means of several high and normal temperature radiation heating elements.
  • the heating elements are arranged in such a way that the heating point is divided into two concentric zones, the inner zone being heated only by the high-temperature radiation heating elements which can preferably be used as auxiliary heating elements in the boiling phase and the outer zone by the normal-temperature radiation heating elements.
  • a comparable arrangement of several radiant heating elements in the area of a cooking zone can also be found in US Pat. No. 4,639,579.
  • a heating device with a gas burner which has two burner chambers which can be acted upon independently of one another and which, for example, Can limit concentric zones in the cooking zone area is described in US Pat. No. 4,083,355.
  • Protective temperature limiter for example between the heating elements and the glass ceramic surface mostly along a diameter arranged rod expansion switches, which usually switch off the heating device completely or reduce its performance when a certain limit temperature is exceeded. After running through a hysteresis, the full heating output is switched on again. From DE-OS 3 314 501, for example, a rod expansion switch with two different switching points is known, which switches accordingly at two different temperatures.
  • the abnormal loading conditions described above can lead to damage to the glass ceramic cooktop on the one hand and on the other hand considerably impair the efficiency of the cooking system.
  • the object of the invention is to provide an improved method for power control and limitation in the case of a heating surface made of glass ceramic or a comparable material, in particular in the case of a glass ceramic cooking surface, which enables the cooking system to be used optimally even when poor cookware is used, but also the thermal load to keep the heating surface small.
  • Another object of the invention is to provide a suitable device for carrying out the method in a hob with a glass ceramic hob.
  • the temperature distribution in the heating zone is recorded with a plurality of independent temperature sensors arranged in the area of a heating zone, which can be integrated into the cooking zone area, for example, and the temperature signals obtained therefrom are used to detect the temperature distribution in the heating zone Switching and controlling the heating elements or heating circuits assigned to the heating zone independently of one another in such a way that the power distribution and thus the surface load of the heating zone is adapted to the locally different heat flow, which, for example, depends on the geometry of the support surface of the pots placed on the hob.
  • heating takes place, for example, even when the pot quality is poor, with optimal heating output, while in places where there is little heat extraction, the heating output is prevented by overheating by reducing the number of cycles, for example.
  • the conversion of the temperature measurement signals into control signals for the power supply of the heating elements is carried out with the help of control devices known per se.
  • the power supply for the heating elements is interrupted until the temperature in the assigned overheated cooking zone area is again below the threshold temperature.
  • the full heating output is then switched on again.
  • the power supply for the heating elements is reduced continuously or stepwise at intervals, for example to a level which is reduced by at least 10%, until the heating power of the heating elements is optimally matched to the maximum possible heat removal in the assigned area of the heating zone is adapted.
  • the gradual power reduction at different switching temperatures can take place in a manner known per se in such a way that for each switching temperature there is a separate temperature sensor in the area of the heating zone assigned to the respective heating element.
  • Mutually independent temperature sensors in the sense of this invention can be, for example, electromechanical temperature sensors with a plurality of mutually independent switching contacts, such as the known rod expansion switches, for example in the form of capillaries filled with molten salt, with several, but at least two, mutually independent switching contacts.
  • the switching contact which limits the maximum surface temperature, should advantageously respond at a temperature which is at least 10 K above the switching temperatures of the other switching contacts, with the aid of which the power is reduced.
  • Thermally conductive rods or sheets or the like can also be used as temperature sensors, to which the actual temperature sensor is coupled outside the radiator or the heated zone.
  • thermocouples or other suitable temperature sensors arranged in the form of a grid in the area of the heating zone. In order to ensure sufficient thermal contact with the heating surface, these must be pressed onto the heating surface. Such temperature sensors can also be integrated into the heating surface. For example, thermocouples can be embedded or rolled into the heating surface.
  • the temperature sensors known from DE-PS 21 39 828 and integrated into the heating surfaces are preferably used.
  • two parallel conductor tracks are applied to the heating surface in the area of the heating zones in a manner known per se, for example by means of screen printing or vapor deposition or other methods, and then baked.
  • the very strong temperature-dependent electrical resistance of the glass ceramic delimited between the conductor tracks represents the actual temperature sensor.
  • large-scale temperature sensors of any shape can be implemented in a simple manner, which permit area-wide temperature monitoring.
  • This can also be used, for example Monitor and control large-area heat radiators and heat exchangers with heating surfaces made of glass ceramic, glass or similar materials.
  • the geometrical arrangement of the conductor tracks in the region of a heating zone is expediently adapted to the geometrical arrangement of the heating elements and to the expected temperature distribution in the case of known anomalous thermal load cases.
  • the temperature sensors advantageously detect all essential parts of the heated areas of the heating zone assigned to the heating elements, so that local overheating is also detected. For example, heating coil loops or in the area of flame tips, e.g. with gas heating, higher temperatures occur at these points than neighboring points. These temperature peaks must be recorded, otherwise the heating surface can be damaged at these points.
  • FIGS. 1 and 2 show an example of a device which is particularly suitable for carrying out the method according to the invention in a hob with a glass ceramic hob.
  • gold conductor tracks (2) are arranged within the cooking zone (1) of a glass ceramic hob on the glass ceramic underside.
  • the conductor track is selected such that the outer circle (3a) and the inner circle (3b) of a two-circuit heating element (4) are each covered with ring-shaped conductor tracks.
  • the connection areas (5) lie outside the cooking zone (1) for protection against thermal loads.
  • Figure 2 shows the arrangement consisting of the glass ceramic plate (6), the two-circuit heating element (4) with the heating coils (4a) and the printed conductors (2) printed on the underside of the glass ceramic and the connection areas (5) in section.
  • the invention is in no way limited to the use of the two-circuit heating elements shown in FIGS. 1 and 2.
  • any heating device can be used that is composed of several heating elements that can be switched and controlled independently of one another in the area of a cooking zone.
  • the invention can e.g. can also be used with gas burners, e.g. also in the gas burner known from US Pat. No. 4,083,355 with two burner chambers which can be acted upon independently of one another by fuel.
  • the heating elements can e.g. be arranged in a grid below the cooking zone.
  • the geometric arrangement of the heating elements is advantageously adapted to the geometry of the cookware or to the temperature distribution in the cooking zone area in the case of known anomalous thermal loads, so that effective control of the power distribution to the locally different heat extraction is possible.
  • the conductor tracks (2) cover only a small part of the cooking zone. Track widths of ⁇ 3 mm are preferred. In the present case, the conductor tracks are 1-2 mm wide, so that the total area of the conductor tracks is small in relation to the area of the heated zone. Influencing the This minimizes the total heat flow.
  • the surface resistance of these interconnect layers is ⁇ 50 m ⁇ / ⁇ with layer thicknesses below 1 ⁇ m.
  • FIGS. 3a and 3b show corresponding arrangements for square and oval multi-circuit heating elements.
  • the parallel conductor tracks (2) within the cooking zone (1) delimit narrow circular or linear temperature measuring zones in which the glass ceramic volume delimited by the conductor tracks serves as a temperature-dependent resistor.
  • the temperature coefficient of these measuring resistors is negative. It is strongly temperature-dependent and is e.g. for glass ceramics of the SiO2-Al2O3-Li2O system at 300 ° C 3.3% / ° C.
  • the constants a and b are constants dependent on the geometry of the conductor tracks and on the glass ceramic (a in Ohm * cm and b in Kelvin).
  • T i is the absolute temperature of each differential resistor in Kelvin.
  • the total electrical resistance is determined by the smallest resistance at the point of the highest temperature of the sensor zones, which results in an automatic display of the maximum temperature in the respective sensor zone. Locally occurring high temperatures cause one or more differential resistors to become low-ohmic in relation to the other differential resistors that are in colder zones, so that the total resistance of a sensor according to Eq. 2 becomes very small.
  • FIG. 4 schematically shows a section of the opposite conductor tracks (2) for clarification.
  • the glass ceramic defined between them can be understood as a parallel connection of many temperature-dependent differential resistors.
  • the conversion of the temperature-dependent change in conductivity of the glass ceramic into a measurement signal can be implemented in a voltage divider supplied with AC voltage, in which a resistance is formed by the temperature-dependent resistance of the sensor surfaces.
  • the fixed resistors of the voltage divider must be selected so that at temperatures that exceed the permissible temperature / time load, sufficient signal changes can be picked up on the voltage divider for further processing.
  • the temperature range in which the largest signal swing occurs can be changed by adjusting the fixed resistors.
  • the fixed resistors also serve to limit the current.
  • the AC voltage is necessary to avoid polarization effects of the glass ceramic and the associated electrochemical decomposition due to the ion migration. Frequencies in the range between 50 Hz and 1000 Hz are preferred for the applied AC voltage.
  • FIG. 5a schematically shows the circuit arrangement according to the invention, a voltage divider (7) for each temperature sensor being shown in each case.
  • Both voltage dividers are supplied by an AC voltage source (8), shown here as a transformer. This ensures that the glass ceramic, shown here as a temperature-dependent resistor (9), is not flowed through by direct current.
  • the two fixed resistors (10a) and (10b) were chosen so that a large signal change in the range from 500 to 600 ° C occurs. This temperature range is characteristic of the surface temperatures that occur in practice within the cooking zones (1) of glass ceramic hobs.
  • the AC voltage signal present at the voltage divider is rectified via a rectifier circuit and fed to a suitable electronic circuit.
  • a rectifier circuit can be operational amplifiers, which are connected as comparators, or other circuits and components known from electronics, such as ⁇ -processors or the like.
  • the signals supplied by the sensors are processed in these circuits in such a way that a signal is available at their output with which the individual heating circuits can be controlled via relays or power semiconductor components such as triac's or MOS-FET's.
  • the power control can take place, for example, by means of phase control, half or full wave packet control with different duty cycles, so that constant temperature controls are also possible.
  • the output signal of the control electronics can also be supplied to the semiconductor components described above via optocouplers or other circuits which serve for the electrical isolation between control electronics and power section. So-called zero voltage switches can also be implemented, which only switch the individual heating circuits of the heating elements at zero voltage crossing.
  • the signal tapped at the voltage divider (7) is fed via a rectifier circuit (11) to the one input of an operational amplifier (12) connected as a comparator.
  • the comparator has the task of comparing the temperature-dependent signal originating from the sensor arrangement with a fixed voltage value, the threshold voltage Us in FIG. 5b. If the voltage from the sensor is above the threshold voltage, which would be the case in the present arrangement at relatively low temperatures, e.g. when using good dishes, the output of the comparator is switched through.
  • This signal is fed via a diode (13) and an optocoupler (14) to a semiconductor AC switch (triac) with an integrated zero voltage switch (15) which controls the heating coil (4a) of a heating circuit. It is particularly important that the present arrangement provides galvanic isolation between the electronic measuring circuit and the power section.
  • the output of the comparator (12) switches to negative potential.
  • the diode (13) blocks, so that the triac (15) also blocks.
  • the corresponding heating circuit is switched off.
  • the temperature of the glass ceramic decreases again, as a result of which the electrical resistance of the sensors increases again.
  • This increases the voltage at the output of the voltage divider back to.
  • the output of the comparator (12) switches back to positive potential, as a result of which the triac (15), which is now conductive again, ignites at zero crossing and thus the corresponding one Heating coil is switched on. With this arrangement, regulation is thus possible, separately for each heating circuit.
  • FIG. 6a shows the voltage curve over time for U i (inner circle) and U a (outer circle).
  • pots of good quality are provided with the full nominal output, which, based on the area of the cooking zone, can be considerably higher than that of the heating elements previously used in glass ceramic cooktops. This significantly increases the performance of the cooking system.
  • the power distribution is changed so that the temperature / time load on the glass ceramic is reduced under the pan base. In the areas of the cooking zone in which the pot stands up and good heat extraction takes place, an increased power density compared to conventional heating systems is maintained, while in areas with poor thermal contact the power is reduced accordingly. Overall, the cooking time is reduced due to the higher average power offered for parboiling with poor dishes.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Control Of Resistance Heating (AREA)
  • Electric Stoves And Ranges (AREA)
  • Resistance Heating (AREA)
  • Control Of Temperature (AREA)
  • Glass Compositions (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
EP91110463A 1990-07-18 1991-06-25 Dispositif pour la régulation et le limitation de la puissance d'une surface de chauffage en céramique ou un matériau similaire Expired - Lifetime EP0471171B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4022846 1990-07-18
DE4022846A DE4022846C2 (de) 1990-07-18 1990-07-18 Vorrichtung zur Leistungssteuerung und -begrenzung bei einer Heizfläche aus Glaskeramik oder einem vergleichbaren Material

Publications (3)

Publication Number Publication Date
EP0471171A2 true EP0471171A2 (fr) 1992-02-19
EP0471171A3 EP0471171A3 (en) 1992-08-05
EP0471171B1 EP0471171B1 (fr) 1995-01-11

Family

ID=6410522

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91110463A Expired - Lifetime EP0471171B1 (fr) 1990-07-18 1991-06-25 Dispositif pour la régulation et le limitation de la puissance d'une surface de chauffage en céramique ou un matériau similaire

Country Status (6)

Country Link
US (1) US5352864A (fr)
EP (1) EP0471171B1 (fr)
JP (1) JP2715193B2 (fr)
AT (1) ATE117157T1 (fr)
DE (2) DE4022846C2 (fr)
ES (1) ES2066280T3 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0531987A2 (fr) † 1991-09-12 1993-03-17 E.G.O. Elektro-Geräte Blanc und Fischer GmbH & Co. KG Dispositif de chauffage électrique
WO1994024490A1 (fr) * 1993-04-13 1994-10-27 Redring Electric Limited Plaque de chaleur
EP0711098A1 (fr) * 1994-11-04 1996-05-08 Compagnie Europeenne Pour L'equipement Menager "Cepem" Appareil de cuisson à induction
EP0786923A2 (fr) * 1996-01-26 1997-07-30 AEG Hausgeräte GmbH Système de commutation pour une protection contre le suréchauffement d'une plaque vitro-céramique d'une aire de cuisson
DE10103299A1 (de) * 2001-01-25 2002-08-01 Bsh Bosch Siemens Hausgeraete Kochmuldenheizvorrichtung
DE10307246A1 (de) * 2003-02-17 2004-08-26 E.G.O. Elektrogerätebau GmbH Heizungseinrichtung mit zwei Bereichen
WO2007124891A1 (fr) * 2006-04-28 2007-11-08 E.G.O. Elektro-Gerätebau GmbH Procédé et dispositif de mesure de température d'un dispositif de chauffage par induction
EP2983449A1 (fr) * 2014-08-08 2016-02-10 BSH Hausgeräte GmbH Procede d'acceleration d'un processus de cuisson, dispositif de commande et appareil de cuisson correspondant
WO2022022978A1 (fr) * 2020-07-30 2022-02-03 BSH Hausgeräte GmbH Système de plaque de cuisson et procédé de fonctionnement de système de plaque de cuisson

Families Citing this family (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4345472C2 (de) * 1993-10-28 2001-05-10 Aeg Hausgeraete Gmbh Verfahren zum Zubereiten von Speisen in einem wenigstens teilweise mit Wasser gefüllten Kochgeschirr auf einem Kochfeld aus Keramik, insbesondere Glaskeramik
DE4445426A1 (de) 1994-12-20 1996-06-27 Schott Glaswerke Strahlungsbrenner mit einer gasdurchlässigen Brennerplatte
US5640947A (en) * 1995-02-15 1997-06-24 Shute; Alan B. Counter-top cooking unit using natural stone
DE19604306C2 (de) * 1996-02-07 2000-05-11 Ako Werke Gmbh & Co Strahlungsheizkörper
DE19646826C5 (de) * 1996-02-22 2008-10-16 AEG Hausgeräte GmbH Vorrichtung zur Temperaturmessung an Kochstellen
DE19643698C2 (de) * 1996-05-11 2000-04-13 Aeg Hausgeraete Gmbh Vorrichtung zur Abschirmung von für kapazitive Messungen verwendeten Leiterbahnen eines Kochfeldes
DE19632057C2 (de) * 1996-08-09 2000-06-21 Schott Glas Verfahren zum Kalibrieren von Temperaturmeßwiderständen auf Trägern aus Glas, Glaskeramik oder dergleichen
DE19654773C1 (de) * 1996-12-31 1998-04-23 Schott Glaswerke Verfahren und Vorrichtung zur betrieblichen Messung der Temperatur in mindestens einer Kochzone eines Kochfeldes mit einer Glaskeramikplatte
DE19700753C2 (de) * 1997-01-11 2000-09-14 Schott Glas Kochfeld mit einer nicht-metallischen Kochplatte
GB2327541A (en) * 1997-07-17 1999-01-27 Ceramaspeed Ltd Electric heater control for a glass-ceramic top cooking appliance
US5973298A (en) * 1998-04-27 1999-10-26 White Consolidated Industries, Inc. Circular film heater and porcelain enamel cooktop
DE19828052A1 (de) * 1998-06-24 1999-12-30 Cherry Gmbh Einrichtung zur Temperaturbegrenzung eines Glaskeramikkochfelds
DE19845103A1 (de) * 1998-09-30 2000-04-06 Bsh Bosch Siemens Hausgeraete Kontaktwärmeübertragendes elektrisches Kochsystem und Verfahren zum Betreiben eines entsprechenden Kochsystems
DE19851029C2 (de) * 1998-11-05 2000-12-21 Schott Glas Verfahren zum Anpassen des Grenzwertes der Betriebstemperatur einer Glas-/Glaskeramikkochfläche und Vorrichtung zur Durchführung des Verfahrens
DE19906115C1 (de) 1999-02-13 2000-08-31 Schott Glas Verfahren zum Erkennen des Leerkochens von Geschirr bei Kochfeldern mit einer Glaskeramik-Kochfläche und zugehörige Vorrichtung
US6127659A (en) * 1999-04-26 2000-10-03 Hardt Equipment Manufacturing Inc. Food warmer
US6242722B1 (en) * 1999-07-01 2001-06-05 Thermostone Usa, Llc Temperature controlled thin film circular heater
US6225608B1 (en) 1999-11-30 2001-05-01 White Consolidated Industries, Inc. Circular film heater
DE10023179C2 (de) * 2000-05-11 2002-07-18 Schott Glas Vorrichtung und deren Verwendung Steuerung von Kochfeldern mit Glaskeramikkochflächen
DE10041967A1 (de) * 2000-08-25 2002-03-21 Schott Glas Kochfläche aus Glaskeramik
EP1355214A3 (fr) * 2002-04-17 2004-12-15 Diamond H Controls Limited Capteur thermique, procédé de fabrication et utilisation comme détecteur d'absence de flamme
GB2391725A (en) * 2002-04-17 2004-02-11 Diamond H Controls Ltd Control device with thermal sensor
GB0313831D0 (en) * 2003-06-16 2003-07-23 Ceramaspeed Ltd Apparatus and method for detecting abnormal temperature rise associated with a cooking arrangement
FR2856881B1 (fr) * 2003-06-30 2005-08-26 Frima Sa Plaque chauffante avec une pluralite de pistes chauffantes, ainsi qu'un appareil de cuisson comprenant une telle plaque chauffante
US7025893B2 (en) * 2003-08-12 2006-04-11 Thermo Stone Usa, Llc Structure and method to compensate for thermal edge loss in thin film heaters
KR20050026598A (ko) * 2003-09-09 2005-03-15 삼성전자주식회사 전기조리기 및 그 제어방법
FR2859867B1 (fr) * 2003-09-16 2006-04-14 Frima Sa Element chauffant pour appareil de cuisson
DE102004034204A1 (de) * 2004-07-14 2006-02-09 Meier Vakuumtechnik Gmbh Heizplatte, insbesondere für einen Laminator
EP1946615A4 (fr) * 2005-10-05 2015-04-01 Evo Inc Appareil de cuisson electrique
DE102007012379A1 (de) * 2007-03-14 2008-09-18 BSH Bosch und Siemens Hausgeräte GmbH Kochfeldvorrichtung
DE102008041184B4 (de) * 2008-08-12 2023-08-17 BSH Hausgeräte GmbH Verfahren und Vorrichtung zum Betreiben einer Kochstelle eines Kochfeldes
ES2356780B1 (es) 2009-01-20 2012-03-13 Bsh Electrodomésticos España, S.A. Campo de cocción con al menos una zona de calentamiento de varios elementos de calentamiento.
US9282593B2 (en) * 2011-06-03 2016-03-08 General Electric Company Device and system for induction heating
US9909764B2 (en) * 2016-07-11 2018-03-06 Haier Us Appliance Solutions, Inc. Cooking appliance and method for limiting cooking utensil temperatures using dual control modes
KR102069583B1 (ko) * 2017-06-26 2020-01-23 엘지전자 주식회사 유도 가열 장치 및 유도 가열 장치의 용기 감지 방법
US11562913B2 (en) * 2019-04-25 2023-01-24 Watlow Electric Manufacturing Company Multi-zone azimuthal heater

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2060329A (en) * 1979-10-11 1981-04-29 Thorn Domestic Appliances Ltd Cooking hobs
GB2138659A (en) * 1980-01-14 1984-10-24 Johnson Matthey Plc Glass Ceramic Hob including Temperature Sensor
EP0138314A1 (fr) * 1983-08-31 1985-04-24 THORN EMI Appliances Limited Appareil de chauffage

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3622754A (en) * 1970-07-24 1971-11-23 Gen Electric Glass plate surface heating unit with even temperature distribution
DE2139828C3 (de) * 1971-08-09 1974-02-14 Jenaer Glaswerk Schott & Gen., 6500 Mainz Temperaturmeßwiderstand mit großer Temperaturwechselbeständigkeit aus Glaskeramik
NL176301C (nl) * 1974-08-24 Schwank Gmbh Toestel met ten minste een gasbrander voor een kookplaat.
US4237368A (en) * 1978-06-02 1980-12-02 General Electric Company Temperature sensor for glass-ceramic cooktop
FR2476308A1 (fr) * 1980-01-14 1981-08-21 Johnson Matthey Co Ltd Plaque en vitre ceramique comprenant un dispositif de mesure de la temperature
NZ196104A (en) * 1980-02-01 1984-08-24 Micropore International Ltd Cooker plate with twin element:thermal cut-out for one
US4394546A (en) * 1980-10-09 1983-07-19 Alps Electric Co., Ltd. Composite switch assembly
DE3117205A1 (de) * 1981-04-30 1982-12-02 Ernst Dipl.-Kfm. Dr. 7100 Heilbronn Haag Optoelektronische kochfeldsteuerung
FR2515790B1 (fr) * 1981-10-29 1986-12-12 Dietrich De Perfectionnement aux indicateurs de chaleur residuelle pour tables ou plans de cuisson a energie electrique
US4394564A (en) * 1981-12-21 1983-07-19 General Electric Company Solid plate heating unit
DE3314501A1 (de) * 1983-04-21 1984-10-25 Ego Elektro Blanc & Fischer Heizelement, insbesondere strahlungs-heizelement fuer die beheizung von glaskeramikplatten
DE3234349A1 (de) * 1982-09-16 1984-03-22 Ego Elektro Blanc & Fischer Heizkoerper fuer glaskeramikkochflaechen
GB8412339D0 (en) * 1984-05-15 1984-06-20 Thorn Emi Domestic Appliances Heating apparatus
DE3639186A1 (de) * 1986-11-15 1988-05-26 Ego Elektro Blanc & Fischer Elektro-schaltgeraet, insbesondere zur leistungssteuerung
US4755655A (en) * 1986-12-04 1988-07-05 General Electric Company Thermal protection arrangement for solid disk glass cooktop
US4740664A (en) * 1987-01-05 1988-04-26 General Electric Company Temperature limiting arrangement for a glass-ceramic cooktop appliance
DE3736005A1 (de) * 1987-10-23 1989-05-03 Bosch Siemens Hausgeraete Steuereinheit fuer elektronische kochstellen-temperaturregelung mit temperatursensor
DE8914470U1 (fr) * 1988-12-09 1990-06-21 Redring Electric Ltd., Peterborough, Gb
US5001423A (en) * 1990-01-24 1991-03-19 International Business Machines Corporation Dry interface thermal chuck temperature control system for semiconductor wafer testing
DE4022844C1 (fr) * 1990-07-18 1992-02-27 Schott Glaswerke, 6500 Mainz, De
DE4022845A1 (de) * 1990-07-18 1992-01-23 Schott Glaswerke Temperatursensor oder -sensoranordnung aus glaskeramik und kontaktierenden filmwiderstaenden
GB2263379B (en) * 1992-01-10 1995-07-26 Ceramaspeed Ltd Radiant heater having multiple heating zones

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2060329A (en) * 1979-10-11 1981-04-29 Thorn Domestic Appliances Ltd Cooking hobs
GB2138659A (en) * 1980-01-14 1984-10-24 Johnson Matthey Plc Glass Ceramic Hob including Temperature Sensor
EP0138314A1 (fr) * 1983-08-31 1985-04-24 THORN EMI Appliances Limited Appareil de chauffage

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0531987B2 (fr) † 1991-09-12 2003-11-05 E.G.O. Elektro-Gerätebau GmbH Dispositif de chauffage électrique
EP0531987A2 (fr) † 1991-09-12 1993-03-17 E.G.O. Elektro-Geräte Blanc und Fischer GmbH & Co. KG Dispositif de chauffage électrique
WO1994024490A1 (fr) * 1993-04-13 1994-10-27 Redring Electric Limited Plaque de chaleur
EP0711098A1 (fr) * 1994-11-04 1996-05-08 Compagnie Europeenne Pour L'equipement Menager "Cepem" Appareil de cuisson à induction
FR2726634A1 (fr) * 1994-11-04 1996-05-10 Europ Equip Menager Appareil de cuisson a induction
EP0786923A2 (fr) * 1996-01-26 1997-07-30 AEG Hausgeräte GmbH Système de commutation pour une protection contre le suréchauffement d'une plaque vitro-céramique d'une aire de cuisson
EP0786923A3 (fr) * 1996-01-26 1998-01-07 AEG Hausgeräte GmbH Système de commutation pour une protection contre le suréchauffement d'une plaque vitro-céramique d'une aire de cuisson
DE10103299A1 (de) * 2001-01-25 2002-08-01 Bsh Bosch Siemens Hausgeraete Kochmuldenheizvorrichtung
DE10103299B4 (de) * 2001-01-25 2010-08-05 BSH Bosch und Siemens Hausgeräte GmbH Kochmuldenheizvorrichtung
DE10307246A1 (de) * 2003-02-17 2004-08-26 E.G.O. Elektrogerätebau GmbH Heizungseinrichtung mit zwei Bereichen
US7053340B2 (en) 2003-02-17 2006-05-30 E.G.O. Elektro-Geraetebau Gmbh Heating device with two areas
WO2007124891A1 (fr) * 2006-04-28 2007-11-08 E.G.O. Elektro-Gerätebau GmbH Procédé et dispositif de mesure de température d'un dispositif de chauffage par induction
EP2983449A1 (fr) * 2014-08-08 2016-02-10 BSH Hausgeräte GmbH Procede d'acceleration d'un processus de cuisson, dispositif de commande et appareil de cuisson correspondant
WO2022022978A1 (fr) * 2020-07-30 2022-02-03 BSH Hausgeräte GmbH Système de plaque de cuisson et procédé de fonctionnement de système de plaque de cuisson

Also Published As

Publication number Publication date
DE4022846C2 (de) 1994-08-11
EP0471171B1 (fr) 1995-01-11
JPH05347177A (ja) 1993-12-27
DE4022846A1 (de) 1992-01-23
ES2066280T3 (es) 1995-03-01
JP2715193B2 (ja) 1998-02-18
EP0471171A3 (en) 1992-08-05
DE59104213D1 (de) 1995-02-23
US5352864A (en) 1994-10-04
ATE117157T1 (de) 1995-01-15

Similar Documents

Publication Publication Date Title
EP0471171B1 (fr) Dispositif pour la régulation et le limitation de la puissance d'une surface de chauffage en céramique ou un matériau similaire
EP0467134B1 (fr) Procédé et appareil pour indiquer un état de charge anormal thermique d'un panneau chauffé
DE3744372C2 (de) Leistungssteuerungsverfahren zum Schutz von Glaskeramikkochflächen
DE4130337C2 (de) Verfahren zum Betrieb einer elektrischen Heizeinheit und elektrische Heizeinheit
EP0467133B1 (fr) Capteur de températures ou dispositif de mesure de la température en céramique de verre pourvu de résistances en couches minces
DE69832329T2 (de) Verfahren und Vorrichtung zur Regelung eines elektrischen Heizelementes
EP0250880B1 (fr) Corps de chauffage à rayonnement
DD253137A5 (de) Glaskeramik-kochfeld mit heizkoerpern mit in der anheizphase schnell gluehenden heizleitern
CH654966A5 (de) Elektrischer kochherd.
DE4345472C2 (de) Verfahren zum Zubereiten von Speisen in einem wenigstens teilweise mit Wasser gefüllten Kochgeschirr auf einem Kochfeld aus Keramik, insbesondere Glaskeramik
AT389612B (de) Elektrische strahlungsheizeinheit
DE10111734A1 (de) Keramisches Kochsystem mit Glaskeramikplatte, Isolationsschicht und Heizelementen
EP0967839A2 (fr) Plaque de cuisson munie d'une unité de commande dans le but de déterminer le niveau de puissance fournie
DE4413979C2 (de) Sensorgesteuerte Garungseinheit und Gargerät
DE19646826A1 (de) Vorrichtung und Verfahren zur Temperaturmessung und Topferkennung an Kochstellen
EP0777169A1 (fr) Dispositif de régulation de puissance pour un élément de chauffage par rayonnement
WO2001062046A1 (fr) Ensemble plaque de cuisson dote d'un capteur de temperature
DE19500448A1 (de) Heizeinheit
DE102017114951A1 (de) Verfahren zum Betrieb einer Kochstelle eines Induktionskochfelds mit einem Kochgeschirr
DE2914304C2 (fr)
DE19526091A1 (de) Einrichtung zur Temperaturbegrenzung eines elektrischen Wärmegerätes
EP1074823A1 (fr) Table de cuisson avec capteur de poids
DE60220784T2 (de) Verfahren und vorrichtung zum regeln eines kochgerätes
EP0754918B1 (fr) Table de cuisson avec un dispositif détecteur pour éléments chauffants des cuisinières.
DE3601634C2 (de) Vorrichtung zum Regeln oder Begrenzen der Temperatur von Strahlungs- oder Kontaktheizkörpern

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT CH DE ES FR GB IT LI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT CH DE ES FR GB IT LI

17P Request for examination filed

Effective date: 19920821

17Q First examination report despatched

Effective date: 19931123

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DE ES FR GB IT LI

REF Corresponds to:

Ref document number: 117157

Country of ref document: AT

Date of ref document: 19950115

Kind code of ref document: T

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19950119

REF Corresponds to:

Ref document number: 59104213

Country of ref document: DE

Date of ref document: 19950223

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2066280

Country of ref document: ES

Kind code of ref document: T3

ITF It: translation for a ep patent filed

Owner name: STUDIO TORTA SOCIETA' SEMPLICE

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20050610

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20050613

Year of fee payment: 15

Ref country code: DE

Payment date: 20050613

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20050614

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20050615

Year of fee payment: 15

Ref country code: AT

Payment date: 20050615

Year of fee payment: 15

REG Reference to a national code

Ref country code: CH

Ref legal event code: PUE

Owner name: SCHOTT AG

Free format text: SCHOTT GLASWERKE#HATTENBERGSTRASSE 10#D-55122 MAINZ 1 (DE) -TRANSFER TO- SCHOTT AG#HATTENBERGSTRASSE 10#55122 MAINZ (DE)

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060625

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060625

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060626

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060630

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060630

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20060630

Year of fee payment: 16

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070103

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20060625

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20070228

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20060626

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070625