EP1017256B1 - Kochfeld mit einem Temperatursensor - Google Patents

Kochfeld mit einem Temperatursensor Download PDF

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Publication number
EP1017256B1
EP1017256B1 EP99403325A EP99403325A EP1017256B1 EP 1017256 B1 EP1017256 B1 EP 1017256B1 EP 99403325 A EP99403325 A EP 99403325A EP 99403325 A EP99403325 A EP 99403325A EP 1017256 B1 EP1017256 B1 EP 1017256B1
Authority
EP
European Patent Office
Prior art keywords
hearth
cooking
temperature sensor
temperature
hearth plate
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
EP99403325A
Other languages
English (en)
French (fr)
Other versions
EP1017256A1 (de
Inventor
René c/o Thomson-CSF Propriété Ind. Cornec
Dominique c/o Propriété Industrielle Fournier
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.)
Brandt Cooking SAC
Original Assignee
Brandt Cooking SAC
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 Brandt Cooking SAC filed Critical Brandt Cooking SAC
Publication of EP1017256A1 publication Critical patent/EP1017256A1/de
Application granted granted Critical
Publication of EP1017256B1 publication Critical patent/EP1017256B1/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
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/06—Control, e.g. of temperature, of power
    • H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
    • 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 hob with sensor temperature.
  • Document WO 98 28945 describes an induction furnace comprising a plate capable of being heated by induction by a coil. A sensor temperature is fixed on the lower plate of the oven, allowing to control the operation of the coil at a temperature measured in the enclosure of the oven.
  • a temperature In a hob, you can use a temperature to measure the temperature of a kitchen utensil heated by a fireplace belonging to the hob. Measuring the temperature of the utensil can for example be used to control the heating power provided by the fireplace to a kitchen utensil.
  • the invention aims to overcome these problems by proposing a device without moving parts usable when the hearth is a induction.
  • the invention relates to a hob induction comprising: a hearth plate, a cooking hearth located under the hearth plate, a temperature sensor, the hearth plate being intended for support on its upper side a kitchen utensil heated by the hearth, the temperature sensor comprising a sensitive zone measuring the temperature in an area above the hearth plate vertically of the hearth, characterized in that the sensitive area of the temperature sensor is kept in a fixed position on the upper face of the hearth plate.
  • An advantage linked to the invention is that with a cooking hearth induction, the kitchen utensil placed on the hearth plate above the hearth is hotter than the hearth plate itself. Consequently, even when the cookware is deformed to the point of no longer being contact with the sensitive area of the temperature sensor, the sensor measures the temperature of the kitchen utensil whose heat flow reaches the radiation sensor.
  • a temperature sensor according to the invention present in besides the advantage of limiting the temperature of the hearth plate. This allows to make the hearth plate in a material less resistant to higher temperatures than commonly used glass ceramic. We can for example making the hearth plate in marble, granite, wood, composite material or tiled. So the hearth plate can be made from the same material as a kitchen worktop equipped. Thus, a single mechanical part can perform several functions, such as for example the function of a sink, a worktop and a hearth plate.
  • the hob shown in Figure 1 has a plate hearth 1 and an induction cooking hearth 2 located under the hearth plate 1.
  • the cooking hearth 2 is substantially circular with axis 3.
  • Axis 3 is substantially perpendicular to the hearth plate 1.
  • the cooking hearth 2 has substantially the shape of a flat washer. It is understood that others fireplace shapes are possible to implement the invention.
  • the home of cooking 2 has a hole 13 substantially on axis 3.
  • Certain materials used to make the hearth plate 1, such as for example glass ceramics are not good high electrical insulators temperature. It is therefore necessary to electrically isolate the firebox from cooking 2 of the hearth plate 1. Air can be used to achieve this insulation but advantageously there is between the cooking hearth 2 and the hearth plate 1 an electrical insulator 4 comprising for example mica.
  • the electrical insulation 4 substantially covers the cooking hearth 2.
  • the table also includes a temperature sensor 5.
  • the temperature sensor temperature 5 measures the temperature in an area near the above the hearth plate 1.
  • the temperature sensor 5 is substantially located on axis 3.
  • the temperature sensor 5 includes a sensitive area 6.
  • the sensitive zone 6 is maintained in a fixed position on the upper face 7 of the hearth plate 1.
  • the sensitive zone 6 is advantageously made in a material which conducts heat well, such as for example a metallic material.
  • the sensitive zone 6 can have any shape, as for example example a ball or a disc as shown in figure 1.
  • the sensitive area 6 is for example immobilized by gluing on the upper face 7 of the hearth plate 1.
  • the sensitive area 6 may protrude slightly above the upper face 7 of the hearth plate 1.
  • the sensitive zone 6 has a more surface important than that of hole 9 and completely covers the edges of hole 9.
  • hole 9 weakens the hearth plate 1 and the fact that the sensitive area completely covers the edges of the hole 9 allows the hearth plate 1 to be less sensitive to shocks caused for example by the brutal installation of a cooking utensil on the hearth plate 1.
  • the sensitive zone 6 can just as well be drowned inside the hearth plate 1 and thus flush with the upper face 7 of the hearth plate 1 or even be located slightly below the upper face 7.
  • the temperature sensor 5 includes a component 8 for measuring the temperature.
  • Component 8 is by example a resistance with positive or negative temperature coefficient.
  • the component 8 can also be produced using a thermocouple.
  • the component 8 is fixed to the sensitive zone 6.
  • the hearth plate 1 has a hole 9 of axis 3.
  • the hole 9 contains component 8. Hole 9 is sealed off by the sensitive area 6.
  • the temperature sensor 5 can also be submerged in the hearth plate, when the latter is produced for example by molding.
  • the hob also includes processing means 10.
  • the temperature sensor 5 is connected to the processing means by a link 11.
  • the link 11 passes through the electrical insulation 4 and the cooking hearth 2, by its hole 13 substantially along the axis 3.
  • the processing means 10 can also be connected to the cooking zone 2 in order to supply it with energy.
  • the processing means 10 are then connected to a supply 12 outside the hob.
  • the processing means 10 can by example control the supply to the cooking zone 2 according to the temperature measured by the temperature sensor 5.
  • the hob shown in Figure 2 has the plate hearth 1, cooking hearth 2, electrical insulation 4, heat sensor temperature 5 and the processing means 10.
  • the temperature sensor 5 is also connected to the processing means 10 by the link 11.
  • the link 11 does not pass through the hearth 2.
  • the link 11 is arranged between the cooking hearth 2 and the hearth plate 1, and extends beyond the cooking hearth 2.
  • the link 11 is disposed above the electrical insulation 4. This embodiment has the advantage of facilitating the assembly of the hearth plate 1.
  • the focus of cooking 2 is an induction fireplace. Indeed, the focus of 2 induction cooking directly heats a cooking utensil placed on the hearth plate 1 without heating the connection 11. Other types of hearths would impose a bond 11 resistant to high temperature; what would increase the cost of making the hob.
  • the component 8 is a thermocouple.
  • the thermocouple has a lower impedance than the resistances positive or negative temperature coefficient. This low impedance is less likely to be disturbed by the magnetic field of an induction cooking hearth 2.
  • the hob has only one sensor temperature by induction cooker 2.
  • the cookware may be slightly deformed to the point of no longer be in contact with the sensitive area 6.
  • the temperature measurement may be altered.
  • the cooking plate can include several sensors for temperature of which the sensitive areas of each are distinct and are arranged inside a heating zone marked on the plate hearth 1 by a circle 16 on the top view, the heating zone being located above cooking zone 2.
  • the Figure 3 shows three temperature sensors 5 whose sensitive areas 6 are arranged substantially at the three vertices of an equilateral triangle 15 shown in dotted lines in the top view.
  • the equilateral triangle 15 is centered around a point 0 whose a projection perpendicular to the upper face 7 of the plate hearth 1 is confused with the center C of the inductor when the latter has the shaped like a flat washer.
  • the components 8 of each sensor temperature 5 are all connected to the processing means 10.
  • the means of processing may for example only retain the highest measure of three measurements made by the three temperature sensors 5.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Induction Heating Cooking Devices (AREA)
  • Electric Stoves And Ranges (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Claims (7)

  1. Kochfeld mit einer Kochplatte (1), einer unter der Kochplatte angeordneten Induktions-Kochstelle, einem Temperaturfühler (5), wobei die Kochplatte (1) dazu bestimmt ist, auf ihrer Oberseite (7) ein von der Kochstelle (2) erhitztes Kochgerät zu tragen, wobei der Temperaturfühler (5) eine sensitive Zone (6) aufweist, die die Temperatur in einer oberhalb der Kochplatte (1) senkrecht zur Kochstelle (2) liegenden Zone misst, dadurch gekennzeichnet, daß die sensitive Zone (6) des Temperaturfühlers (5) in einer feststehenden Position auf der Oberseite (7) der Kochplatte (1) gehalten ist.
  2. Kochfeld nach Anspruch 1, dadurch gekennzeichnet, daß die sensitive Zone (6) des Temperaturfühlers (5) aus Metall besteht.
  3. Kochfeld nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß der Temperaturfühler (5) ein mit der sensitiven Zone (6) des Temperaturfühlers (5) verbundenes Thermoelement aufweist.
  4. Kochfeld nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Kochplatte (1) ein Loch (9) aufweist, das ermöglicht, den Fühler mit Mitteln zum Verarbeiten (10) der Temperaturmessung zu verbinden, wobei das Loch in dichter Weise durch die sensitive Zone (6) des Temperaturfühlers (5) verschlossen ist.
  5. Kochfeld nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Kochplatte (1) ein Loch (9) aufweist, das ermöglicht, den Fühler mit Mitteln zum Verarbeiten (10) der Temperaturmessung zu verbinden, und daß die sensitive Zone (6) die Ränder des Lochs vollständig abdeckt.
  6. Kochfeld nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß es eine Vielzahl von Temperaturfühlern (5) oberhalb einer Kochstelle (2) aufweist.
  7. Kochfeld nach Anspruch 6, dadurch gekennzeichnet, daß die Kochstelle (2) im wesentlichen kreisförmig ist und drei Temperaturfühler (5) dreieckförmig (15) oberhalb der Kochstelle (2) angeordnet sind.
EP99403325A 1998-12-30 1999-12-30 Kochfeld mit einem Temperatursensor Expired - Lifetime EP1017256B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9816658A FR2788115B1 (fr) 1998-12-30 1998-12-30 Montage d'un capteur de temperature dans une table de cuisson
FR9816658 1998-12-30

Publications (2)

Publication Number Publication Date
EP1017256A1 EP1017256A1 (de) 2000-07-05
EP1017256B1 true EP1017256B1 (de) 2003-03-12

Family

ID=9534700

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99403325A Expired - Lifetime EP1017256B1 (de) 1998-12-30 1999-12-30 Kochfeld mit einem Temperatursensor

Country Status (3)

Country Link
EP (1) EP1017256B1 (de)
DE (1) DE69905851D1 (de)
FR (1) FR2788115B1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2340643B1 (es) * 2007-02-02 2011-04-08 Bsh Electrodomesticos España, S.A. Unidad inductora.
FR2948253B1 (fr) * 2009-07-17 2013-05-24 Mag Tech Dispositif de chauffe par induction
FR2965330A1 (fr) * 2010-09-23 2012-03-30 Jaeger Capteur pour inducteur ameliore
FR2966687B1 (fr) * 2010-10-21 2016-11-04 Fagorbrandt Sas Dispositif de mesure de temperature d'un groupe d'inducteurs d'une table de cuisson a induction et table de cuisson a induction associee.
GB2552531B (en) * 2016-07-28 2019-10-23 Richards Morphy N I Ltd Temperature sensor in induction cooker

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998028945A1 (en) * 1996-12-20 1998-07-02 Taco Bell Corp. Domed induction oven

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5256860A (en) * 1993-01-22 1993-10-26 Therm-O-Disc, Incorporated Control for glass cooktops utilizing rod-shaped thermistor
FR2728060B1 (fr) * 1994-12-09 1997-08-14 Seb Sa Dispositif pour chauffer par induction un recipient de cuisson
US5603858A (en) * 1995-06-02 1997-02-18 Aladdin Synergetics, Inc. Heat retentive server for induction heating

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998028945A1 (en) * 1996-12-20 1998-07-02 Taco Bell Corp. Domed induction oven

Also Published As

Publication number Publication date
FR2788115B1 (fr) 2001-03-23
DE69905851D1 (de) 2003-04-17
EP1017256A1 (de) 2000-07-05
FR2788115A1 (fr) 2000-07-07

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