EP1154675B1 - Vorrichtung und Verfahren zur Steuerung von Kochfeldern mit Glaskeramikkochflächen - Google Patents

Vorrichtung und Verfahren zur Steuerung von Kochfeldern mit Glaskeramikkochflächen Download PDF

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Publication number
EP1154675B1
EP1154675B1 EP01103428A EP01103428A EP1154675B1 EP 1154675 B1 EP1154675 B1 EP 1154675B1 EP 01103428 A EP01103428 A EP 01103428A EP 01103428 A EP01103428 A EP 01103428A EP 1154675 B1 EP1154675 B1 EP 1154675B1
Authority
EP
European Patent Office
Prior art keywords
temperature measurement
glass
controlling
temperature
conductive
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
EP01103428A
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German (de)
English (en)
French (fr)
Other versions
EP1154675A1 (de
Inventor
Harry Engelmann
Kurt Dr. Schaupert
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
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Filing date
Publication date
Application filed by Carl Zeiss AG, Schott Glaswerke AG filed Critical Carl Zeiss AG
Publication of EP1154675A1 publication Critical patent/EP1154675A1/de
Application granted granted Critical
Publication of EP1154675B1 publication Critical patent/EP1154675B1/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
    • 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
    • H05B2213/05—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 present invention relates to a device and a method for control from cooktops with glass ceramic cooktops.
  • the temperature of the cooking zones of hobs with glass ceramic cooktops is limited with mechanical protection temperature controllers From DE-A 40 22 846 and EP-A 0 823 620 sensors are known which directly on the glass ceramic be applied. You measure the temperature by changing the electrical Resistance of the conductor track or the glass ceramic base material the respective cooking surface. Monitoring the temperature Directly on the glass ceramic is cheap because of overheating or overloading the glass ceramic and the possibly standing pot avoided becomes. The direct glass ceramic temperature measurement thus makes an additional one Security achieved.
  • a hotplate with a switch for the Energy supply of the heating device is known from AT-A 238 331. The switching device gives the energy supply to the heating device when putting on the Pot free and interrupts the energy supply when removing the pot.
  • Pot detection systems with known optical sensors are described in DE-A 37 11 589 and DE-A 37 33 108.
  • Inductive proximity switches are based on the principle of damping an oscillating circuit as a result of eddy current losses in metals that occur in the stray magnetic field a multi-winded sensor coil.
  • Pot detection systems with one inductive sensor in the form of a coil are described in EP-A 0 442 275 and EP-A 0 469 189.
  • Capacitive sensors for pot detection are known from WO-A 90/107851 and EP-A 0 429 120.
  • DE-A 197 00 735 describes a device for inductive detection of Cookware described.
  • the sensors each consist of a single-wind Coil for the transmitter and the receiver, which are concentric in the circle Cooking zone are arranged.
  • the coils can be placed on a support plate, in particular a glass ceramic hotplate, applied conductor tracks his.
  • DE-A 196 46 826 describes apparatus and methods for temperature measurement and pot detection at hotplates known.
  • the sensor is designed as a conductor track, wherein a temperature-dependent between its two outer connection ends electrical resistance is measurable. Two measuring connections are from the conductor track branched, the two branch points one from the outer Central cable section of the conductor path facing away from the connecting ends Limit temperature measurement.
  • the object of the present invention is a new device to control cooktops with glass ceramic cooktops with reduced Number of components, easier connection and safe function as well as an economical one and safe method for controlling cooktops with glass ceramic cooktops provide.
  • the object underlying the invention is achieved by a device for Control of cooktops with glass ceramic cooktops and at least one Circuit structure solved, the circuit structure being a combination of at least one inductive pot detection and at least one temperature measurement contains, the temperature measurement by means of between at least two conductor tracks located glass ceramic and the conductor track for temperature measurement in the edge area and in the center area of the Cooking zone is arranged.
  • This combination makes the same sensors for pot detection and uses the temperature measurement, whereby a simplified according to the invention System with a reduced number of components, easier connection and safer Function is maintained. This also makes it possible to make the connections to lead the inner conductor structure directly next to each other for pot detection, so that the enclosed area is minimized and safe operation by avoiding the malfunction by switching on the cooking zone when setting up of cookware in the cold area is made possible.
  • the cooking surface according to the invention preferably contains a conductor track coating for measuring, monitoring and displaying the temperature required for automatic power distribution, empty cooking shutdown and temperature limitation is being used.
  • the cooktop also contains a conductor track coating for automatic pot, pot shape and pot size detection.
  • the conductor track is for the Temperature measurement in the center area carried out as an electrode with an open end.
  • the conductor track for temperature measurement in the center area as a loop-shaped electrode executed.
  • the lines for the inner circuit circuit are arranged directly next to each other. This arrangement according to the invention advantageously prevents that there is interference and increased uncertainty when a pot is not placed centrally on the hob.
  • a multi-circuit heating element is provided, the innermost one Heating circuit is formed according to the present invention.
  • the invention is suitable for use in multi-circuit radiators.
  • According to the invention is an economical method for controlling cooktops provided with glass ceramic cooktops with a conductor track structure, combined pot detection and temperature measurement.
  • a preferred embodiment of the invention is a method, wherein the Temperature measurement by evaluating the temperature-dependent conductor resistance he follows. Good results are achieved by the evaluation.
  • a preferred embodiment of the invention is a method, wherein the Temperature measurement by evaluating the temperature-dependent resistance the glass ceramic takes place between at least two conductor tracks. The evaluation gives very good results
  • a preferred embodiment of the invention is a method, wherein the Temperature measurement in the edge area and in the center area of the cooking zone he follows. With this arrangement, the entire heating surface is captured very advantageously.
  • a preferred embodiment of the invention is a method, wherein the Temperature measurement in the center area via an electrode with an open end or via a loop-shaped electrode.
  • a preferred embodiment of the invention is a method, wherein the signals of pot detection and temperature measurement by different frequencies for pot detection and temperature measurement.
  • a preferred embodiment of the invention is a method, wherein the signals of pot detection and temperature measurement through time-shifted Queries are separated.
  • a preferred embodiment of the invention is a method, the adjustment the relative sensitivity of temperature measurement from outside and Interior by choosing the lengths and distances of the ladder
  • the separation of the signals detected by the same sensors from the pot detection and temperature measurement takes place through use and decoupling of AC voltages of different frequencies. So the pot detection from 10 MHz to 17 MHz, preferably from 11 MHz to 15 MHz and particularly preferably from 12.5 MHz to 13.5 MHz and the temperature measurement at 150 Hz to 600 Hz, preferably from 200 Hz to 400 Hz and particularly preferred operated from 250 Hz to 350 Hz. Also sequential query of the two Measured variables are possible.
  • the conductor track area for the temperature measurement in the middle of the cooking zone carries not to the signals of the pot detection in the specified embodiment because the electrode coming from the outer circle is not a loop is executed and is therefore not flowed through by the current. It is therefore not inductively effective.
  • the additional conductor structure is in the middle of the cooking zone only derived from the pot detection of the inner heating circuit. With this structure will contribute to both the critical interior of cookware small and large diameter recorded.
  • the exterior of the large heating circuit can by a separate temperature measurement the outer pot detection structure can be detected, such as that for implementation a power redistribution is described in DE-A 40 22 846.
  • the temperature measurement can be sufficient for those described in the literature Applications such as protection temperature limitation, power redistribution, Residual heat indicator or automatic cooking can be used.
  • the applications are described in DE-A 21 39 828, DE-A 40 22 846 and DE-A 37 44 372, which is explicitly referred to here.
  • the arrangement according to the invention has the following advantages.
  • the same Sensors are used for pot detection and temperature limitation.
  • the number of sensors used is halved compared to conventional ones Systems. So can the mechanical protective temperature limiter to be dispensed with.
  • the number of connections for inductive pot detection the additional function of temperature measurement does not use conductor tracks elevated.
  • the leads to the conductor tracks of the pot detection can be tight put together and malfunctions by placing pots in the cold area be prevented.
  • FIGS. 1 to 5 The drawing exists from FIGS. 1 to 5.
  • Fig. 1 shows an embodiment of the prior art.
  • the conductor tracks (A) for measuring the temperature in the central area of the cooking zone using the Resistance of the glass ceramic are between the connections for the Pot detection and the connections for the temperature measurement led out.
  • the connection for the pot detection encloses one in the cold area large area and acts as a single-winding coil, which is used to switch on the pan detection can lead.
  • Fig. 2 shows an embodiment of the device according to the invention.
  • the circular tracks of the pot detection and those in the middle the conductor tracks of an electronic temperature measurement leading the cooking zone combined. This is achieved by the outer circle (1) of the pot detection with a single leading electrode designed as an electrode Track (2) is added.
  • the inner circle (3) is around this single trace led around.
  • the outer circle represents the cooking zone (4).
  • FIG 3 shows a further embodiment of the device according to the invention.
  • the circular traces of the pot detection and the conductor tracks of an electronic temperature measurement leading into the middle of the cooking zone combined. This is achieved by the outer circle (1) of the Pot detection with a conductor track in the middle designed as a loop (2) is added. The inner circle (3) is led around this loop. The outer circle represents the cooking zone (4).
  • Fig. 4 shows a multi-circuit heating element, the innermost heating circuit according to Fig. 2 is formed.
  • a dual-circuit cooking zone is shown as an example, the additional conductor track structure in the middle of the cooking zone only from the pan detection of the inner heating circuit (5) is derived. With this structure the critical interior of both small and large cookware detected.
  • Fig. 5 shows a multi-circuit heating element, the innermost heating circuit according to Fig. 3 is formed.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Cookers (AREA)
  • Induction Heating Cooking Devices (AREA)
  • Surface Treatment Of Glass (AREA)
  • Resistance Heating (AREA)
  • Electric Stoves And Ranges (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
  • Glass Compositions (AREA)
EP01103428A 2000-05-11 2001-02-14 Vorrichtung und Verfahren zur Steuerung von Kochfeldern mit Glaskeramikkochflächen Expired - Lifetime EP1154675B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10023179 2000-05-11
DE10023179A DE10023179C2 (de) 2000-05-11 2000-05-11 Vorrichtung und deren Verwendung Steuerung von Kochfeldern mit Glaskeramikkochflächen

Publications (2)

Publication Number Publication Date
EP1154675A1 EP1154675A1 (de) 2001-11-14
EP1154675B1 true EP1154675B1 (de) 2002-09-18

Family

ID=7641717

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01103428A Expired - Lifetime EP1154675B1 (de) 2000-05-11 2001-02-14 Vorrichtung und Verfahren zur Steuerung von Kochfeldern mit Glaskeramikkochflächen

Country Status (7)

Country Link
US (1) US6501054B2 (da)
EP (1) EP1154675B1 (da)
AT (1) ATE224629T1 (da)
DE (2) DE10023179C2 (da)
DK (1) DK1154675T3 (da)
ES (1) ES2182810T3 (da)
PL (1) PL347461A1 (da)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101936554A (zh) * 2010-08-31 2011-01-05 浙江苏泊尔家电制造有限公司 一种电磁炉用无线测温装置

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DE10232710B4 (de) * 2001-08-28 2007-07-12 Cherry Gmbh Kochstelle mit Kochgefässerkennungssystem
US6815648B2 (en) * 2002-12-31 2004-11-09 General Electric Company Contact sensor arrangements for glass-ceramic cooktop appliances
US8890038B2 (en) 2004-03-30 2014-11-18 Thermoceramix Inc. Heating apparatus with multiple element array
US7482556B2 (en) * 2004-03-30 2009-01-27 Shaw John R Heating apparatus with multiple element array
DE102004059822B4 (de) * 2004-12-03 2011-02-24 E.G.O. Elektro-Gerätebau GmbH Verfahren zum Betrieb eines Induktionskochfelds
US7355150B2 (en) * 2006-03-23 2008-04-08 Access Business Group International Llc Food preparation system with inductive power
US7989986B2 (en) * 2006-03-23 2011-08-02 Access Business Group International Llc Inductive power supply with device identification
US11245287B2 (en) 2006-03-23 2022-02-08 Philips Ip Ventures B.V. Inductive power supply with device identification
BRPI0605541A (pt) * 2006-12-01 2008-07-15 Whirlpool Sa dispositivo e método para controlar um elemento aquecedor de uma placa de cocção vitrocerámica
KR101261645B1 (ko) * 2006-12-14 2013-05-08 엘지전자 주식회사 조리기기 및 그 제어방법
EP1937032B1 (en) * 2006-12-20 2020-11-04 Electrolux Home Products Corporation N.V. Household appliance
US9226343B2 (en) * 2007-11-30 2015-12-29 Nuwave, Llc Apparatus, system, method and computer program product for precise multistage programmable induction cooktop
TWI578237B (zh) 2010-04-08 2017-04-11 通路實業集團國際公司 銷售點感應系統及其方法
US20130175254A1 (en) * 2012-01-10 2013-07-11 General Electric Company Cook top appliance having spill and boil-over detection and response
EP2906083A1 (en) * 2012-10-11 2015-08-19 Arçelik Anonim Sirketi A wireless cooking appliance operated on an induction heating cooktop
DE102013201386A1 (de) * 2013-01-29 2014-07-31 BSH Bosch und Siemens Hausgeräte GmbH Kochfeld mit einer Kochfeldplatte und einer Leiterbahn als Flächenbegrenzung für Elektronikkomponenten
DE102014224051A1 (de) 2014-11-25 2016-05-25 E.G.O. Elektro-Gerätebau GmbH Induktionskochfeld und Verfahren zur Steuerung eines Induktionskochfelds

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101936554A (zh) * 2010-08-31 2011-01-05 浙江苏泊尔家电制造有限公司 一种电磁炉用无线测温装置
CN101936554B (zh) * 2010-08-31 2015-09-09 浙江苏泊尔家电制造有限公司 一种电磁炉用无线测温装置

Also Published As

Publication number Publication date
DE10023179C2 (de) 2002-07-18
US20010052519A1 (en) 2001-12-20
PL347461A1 (en) 2001-11-19
ES2182810T3 (es) 2003-03-16
US6501054B2 (en) 2002-12-31
EP1154675A1 (de) 2001-11-14
ATE224629T1 (de) 2002-10-15
DK1154675T3 (da) 2002-12-02
DE50100026D1 (de) 2002-10-24
DE10023179A1 (de) 2001-11-22

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