EP0722069A2 - Appareil de cuisson - Google Patents

Appareil de cuisson Download PDF

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Publication number
EP0722069A2
EP0722069A2 EP96200004A EP96200004A EP0722069A2 EP 0722069 A2 EP0722069 A2 EP 0722069A2 EP 96200004 A EP96200004 A EP 96200004A EP 96200004 A EP96200004 A EP 96200004A EP 0722069 A2 EP0722069 A2 EP 0722069A2
Authority
EP
European Patent Office
Prior art keywords
sensor
temperature
ceramic plate
cooking appliance
pot
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.)
Withdrawn
Application number
EP96200004A
Other languages
German (de)
English (en)
Other versions
EP0722069A3 (fr
Inventor
Reinhard Dr. Rer. Nat. Kersten
Heinz Körver
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.)
Philips Intellectual Property and Standards GmbH
Koninklijke Philips NV
Original Assignee
Philips Corporate Intellectual Property GmbH
Philips Patentverwaltung GmbH
Koninklijke Philips Electronics NV
Philips Electronics NV
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 Philips Corporate Intellectual Property GmbH, Philips Patentverwaltung GmbH, Koninklijke Philips Electronics NV, Philips Electronics NV filed Critical Philips Corporate Intellectual Property GmbH
Publication of EP0722069A2 publication Critical patent/EP0722069A2/fr
Publication of EP0722069A3 publication Critical patent/EP0722069A3/fr
Withdrawn legal-status Critical Current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
    • H05B3/744—Lamps as heat source, i.e. heating elements with protective gas envelope, e.g. halogen lamps
    • 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 further relates to a system with a cooking appliance and cookware and to a method for carrying out a process control.
  • a cooking appliance mentioned at the outset has become known, for example, from EP 0 037 638 B1.
  • the sensor is arranged at a distance below the heating plate and is located in a cylindrical shield that runs from the heating plate to the bottom of the cooking device.
  • the cylindrical shield is arranged outside the center of the heating plate.
  • GB-PS 15 74 167 discloses a cooking appliance with a glass ceramic plate and a flat heating field which is arranged below the glass ceramic plate and which has electrical resistance elements. A bulge is provided on the outer edge of the heating field, in which a temperature sensor is arranged, which in this design is in direct thermal contact with the glass ceramic plate. Shielding of the sensor is not provided for in this type.
  • the main obstacle in the classic ceramic cooktops described above is the high overheating of the ceramic in the heat transfer area, which is around 500 ° C. This great overheating is due to the fact that the ceramics previously used do not let through a large part of the heat supplied from below, but absorbs it. Therefore, a sensor attached to the ceramic plate does not measure the temperature of the pot placed on it, but a temperature that is mainly determined by the absorbed radiation power or, in the case of shielding, is falsified by so-called transverse heat conduction from the overheated neighboring areas. This measured value can therefore not provide a clear measure of the pot bottom temperature.
  • the halogen spotlight contains two halogen lamps, which are arranged above a specially shaped reflector.
  • the reflector is made of aluminum and therefore has a very high one Reflectance. Aluminum can be used because the majority of the heat energy supplied by the halogen lamps penetrates the ceramic glass plate and therefore there can be no excessive temperatures below the glass ceramic that would destroy the aluminum mirror.
  • the invention has for its object to design a cooking device of the type mentioned in such a way that a reliable temperature measurement of the pot bottom can be made possible by means of the sensor arranged below the glass ceramic plate.
  • halogen lamps also offer the advantage that the thermal energy developed by the halogen lamp is ideally available, ie without absorption by the ceramic plate.
  • the thermal energy developed by the halogen lamp is ideally available, ie without absorption by the ceramic plate.
  • a relatively small part is absorbed, but the main part is immediately available as heating power at the bottom of the pot, so that all heating processes start with this available power and are constantly limited to the set target temperature .
  • the handling takes place in such a way that only the process temperature is set after the pot with the corresponding food to be cooked has been placed on the cooking ceramic. Then the transition from parboiling or heating up to the correct continuous output takes place automatically at the desired process temperature without manual intervention. If necessary, however, individual readjustment can be carried out in a simple manner by setting a changed process temperature.
  • the working temperature is essentially kept good, which is important when grilling, meat fondue or roasting, for example. Unnecessary odors, such as smoking oil, are avoided. Since the bottom temperature of the pot is regulated, sensitive goods are treated particularly gently by avoiding excess temperatures. Fondue oil degrades more slowly, cheese fondue does not curdle and chocolate formulation becomes gently like treated in a water bath. This is a considerable advantage compared to controls that work with a immersion sensor in the food, for example, because full power is transferred almost to the end temperature, which is associated with a significant overheating of the floor boundary layer.
  • Another advantage of the cooking device according to the invention is that when using a pan with an uneven bottom or when the ceramic hob is switched on without a pan being placed, the output is usually automatically limited without causing damage. This means that a pot with an uneven bottom is automatically adjusted to a lower output than a pot with a flat bottom. Furthermore, the remaining transverse heat conduction within the ceramic plate limits the performance of the ceramic hob in the event that no pot was placed on the ceramic plate when the radiant heater was switched on.
  • the system automatically adjusts and tries to keep the optimal temperature as good as possible.
  • the user of the cooking device according to the invention can thus turn to other things after switching on the power and setting a desired temperature without having to fear that the device will get out of control. If necessary, however, he can intervene individually according to his taste and make new temperature specifications.
  • an aluminum reflector be assigned to the halogen lamp system.
  • the ceramic material with smaller Absorption also takes place below the heating plate, so that there is no danger that the reflector made of aluminum will be destroyed.
  • Aluminum has a very high degree of reflection, so that most of the heat flow generated by the halogen spotlights is reflected upwards in the direction of the ceramic plate.
  • the senor is pressed resiliently against the ceramic plate. This design enables simple assembly without complicated mounting.
  • the target temperature can be set in a simple manner by providing a rotary knob with corresponding symbols. This can e.g. be combined with the on / off switch.
  • the setpoint temperature can also be set by a switch combination having a plurality of pressure switches.
  • the senor is made of a highly reflective material, e.g. made of aluminum, existing pipe is shielded. This ensures that the temperature to be sensed by the sensor is falsified as little as possible by the heat radiation from the radiant heater.
  • the diameter of the shielding tube is so large in relation to the contact area of the sensor that the edge areas of the Rohres have no noticeable influence on the temperature sensed by the sensor.
  • the senor is arranged eccentrically on the edge of the hob in a manner known per se.
  • the bottom of the pot used is as flat as possible. This ensures that the air gap between the pot base and the ceramic plate is very small and uniform, so that the heat generated by the heat radiator can reach the pot base unhindered. It has been found that even small air gaps of up to approx. 0.4 mm between the ceramic top and the bottom of the pot are still tolerable and enable the bottom temperature of the pot to be determined with sufficient accuracy.
  • a method for carrying out a process control with a cooking device of the type mentioned above is characterized in that the temperature signals supplied by the sensor are constantly compared with the set target temperature and in that the values determined by the comparison are converted into a control power to be set.
  • Such a method enables automatic process control without fear of overheating. All heating processes start automatically and ideally with the full available power and are constantly limited to the set target temperature in the power.
  • the constant comparison of the measured actual temperature with the target temperature takes place e.g. at a distance of 2.5 seconds. It has been found that such a measurement gives sufficient values.
  • FIG. 1 shows a cooking appliance with a highly transparent glass ceramic plate 10 and with a halogen spotlight 11 arranged below the plate 10, which has two halogen lamps 12 and an aluminum reflector 13 arranged in front of and behind the plane of the drawing.
  • a temperature sensor which is arranged in the edge region of the cooktop, is designated by 14 and is shielded by a cylindrical aluminum tube 15 against the thermal radiation 16 emanating from the halogen lamps 12 and is located between the lamps 12.
  • the sensor 14 is pressed against the glass ceramic plate 10 by a spring 14a.
  • a pot 17 with a liquid 18 stands on the glass ceramic plate.
  • the pot bottom 17a is black, and there is practically no air gap between the pot bottom and the glass ceramic plate.
  • the heat radiation 16 is blocked by the shield 15 from the sensor 14. The radiation 16 which strikes the glass ceramic plate 10 outside the shield 15 is for the most part directed directly onto the pot base 17a.
  • FIG. 3 shows an exemplary embodiment corresponding to FIG. 2, but an air gap 22 is present between the pot bottom 17a and the glass ceramic plate 10.
  • the heat radiation 16 present outside the shield 15 can partially reach the pot bottom 17a via the shield 15, as indicated by 16a. If it is black, the radiation is absorbed and cannot reach sensor 14 and falsify its measurement result.
  • the heat generated by the heat radiation 16 outside the shielding area 20 in the glass ceramic 10 is more or less prevented from flowing into the pot bottom 17a when the shield overflows through the air gap 22. Therefore, in this arrangement there is a somewhat increased heat flow 23 in the direction of the sensor 14.
  • the temperature measured by the sensor 14 can be increased slightly, but, as experience has shown, with air gaps smaller than approximately 0.4 mm and with a black pot bottom remains within small limits. The sensor 14 thus predominantly experiences the heat flow 24 from the pot bottom 17a.
  • 1 to 3 has a control device 25, shown schematically in FIG. 1, with a rotary knob 25a for setting a target temperature.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Electric Stoves And Ranges (AREA)
  • Baking, Grill, Roasting (AREA)
EP96200004A 1995-01-07 1996-01-03 Appareil de cuisson Withdrawn EP0722069A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19500351 1995-01-07
DE19500351A DE19500351A1 (de) 1995-01-07 1995-01-07 Kochgerät

Publications (2)

Publication Number Publication Date
EP0722069A2 true EP0722069A2 (fr) 1996-07-17
EP0722069A3 EP0722069A3 (fr) 1999-04-14

Family

ID=7751122

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96200004A Withdrawn EP0722069A3 (fr) 1995-01-07 1996-01-03 Appareil de cuisson

Country Status (4)

Country Link
US (1) US5919385A (fr)
EP (1) EP0722069A3 (fr)
JP (1) JPH08228937A (fr)
DE (1) DE19500351A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106419622A (zh) * 2016-11-07 2017-02-22 四川唯诺家私有限公司 一种加热烤漆的电热膜烤盘结构

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040016746A1 (en) * 1999-12-29 2004-01-29 Ibiden Co., Ltd. Ceramic heater
KR20010077553A (ko) * 2000-02-03 2001-08-20 장태균 가열온도 조절기능을 갖춘 가열장치
GB2360591B (en) 2000-03-23 2004-04-28 Ceramaspeed Ltd Temperature sensor
DE10064621A1 (de) * 2000-12-21 2002-06-27 Ego Elektro Geraetebau Gmbh Verfahren und Vorrichtung zur Erfassung der Tenperatur eines Kochgefäßes
US6521870B2 (en) 2001-01-11 2003-02-18 General Electric Company Thermal/convection oven including halogen lamps
US7307246B2 (en) * 2004-06-28 2007-12-11 General Electric Company System and method of detecting temperature of a cooking utensil over a radiant cooktop
DE102004033454A1 (de) * 2004-07-07 2006-01-26 E.G.O. Elektro-Gerätebau GmbH Kochgerät mit Temperaturerfassung und Verfahren zur Temperaturerfassung an einem Kochgerät
DE102005015773A1 (de) * 2005-04-06 2006-10-12 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Sensoranordnung
DE102006021029A1 (de) * 2006-04-28 2007-10-31 E.G.O. Elektro-Gerätebau GmbH Vorrichtung und Verfahren zur Temperaturmessung an einer Induktionsheizvorrichtung
CN101776294B (zh) * 2009-01-08 2012-09-26 厦门灿坤实业股份有限公司 一种新型烤箱
ES1135492Y (es) * 2014-12-11 2015-04-13 Eika S Coop Foco radiante adaptado a una encimera de cocción

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1574167A (en) 1976-12-30 1980-09-03 Bosch Siemens Hausgeraete Cooking apparatus
EP0037638B1 (fr) 1980-03-05 1984-05-09 Kenwood Manufacturing Company Limited Appareil de cuisson
DE3842033A1 (de) 1987-07-11 1990-07-05 Bauknecht Hausgeraete Strahlheizkoerper fuer kochgeraete

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3646321A (en) * 1970-06-22 1972-02-29 Gen Motors Corp Infrared surface heating unit
DE2500586A1 (de) * 1975-01-09 1976-07-15 Ego Elektro Blanc & Fischer Elektrokochgeraet
GB2132060B (en) * 1982-12-24 1985-12-18 Thorn Emi Domestic Appliances Heating apparatus
DE3703768A1 (de) * 1987-02-07 1988-08-18 Fissler Gmbh Vorrichtung zum erfassen der temperatur einer mittels heizwicklungen oder halogenlampen aufgeheizten glaskeramikplatte
US4816647A (en) * 1987-11-13 1989-03-28 General Electric Company Power control for appliance having a glass ceramic cooking surface
DE3909246A1 (de) * 1989-03-21 1990-09-27 Leybold Ag Heizvorrichtung fuer das garen von speisen, insbesondere kochplatte
FR2667477A1 (fr) * 1990-09-28 1992-04-03 Philips Electronique Lab Table chauffante a commandes automatiques.
DE4039501A1 (de) * 1990-12-11 1992-06-17 Ego Elektro Blanc & Fischer Elektrischer heizkoerper, insbesondere strahlheizkoerper
DE9108012U1 (fr) * 1991-06-28 1991-09-05 Bosch-Siemens Hausgeraete Gmbh, 8000 Muenchen, De
IT1272028B (it) * 1993-03-15 1997-06-10 Whirlpool Italia Dispositivo per rilevare la presenza di un contenitore per alimenti, quale una pentola, una pirofila o similare, su un piano di cottura in vetroceramica.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1574167A (en) 1976-12-30 1980-09-03 Bosch Siemens Hausgeraete Cooking apparatus
EP0037638B1 (fr) 1980-03-05 1984-05-09 Kenwood Manufacturing Company Limited Appareil de cuisson
DE3842033A1 (de) 1987-07-11 1990-07-05 Bauknecht Hausgeraete Strahlheizkoerper fuer kochgeraete

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106419622A (zh) * 2016-11-07 2017-02-22 四川唯诺家私有限公司 一种加热烤漆的电热膜烤盘结构

Also Published As

Publication number Publication date
JPH08228937A (ja) 1996-09-10
US5919385A (en) 1999-07-06
DE19500351A1 (de) 1996-07-11
EP0722069A3 (fr) 1999-04-14

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