EP1217873A2 - Procédé et dispositif de détection de la température d'un ustensile de cuisine - Google Patents

Procédé et dispositif de détection de la température d'un ustensile de cuisine Download PDF

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Publication number
EP1217873A2
EP1217873A2 EP01128793A EP01128793A EP1217873A2 EP 1217873 A2 EP1217873 A2 EP 1217873A2 EP 01128793 A EP01128793 A EP 01128793A EP 01128793 A EP01128793 A EP 01128793A EP 1217873 A2 EP1217873 A2 EP 1217873A2
Authority
EP
European Patent Office
Prior art keywords
measuring element
hotplate
temperature
cooking
cooking vessel
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
EP01128793A
Other languages
German (de)
English (en)
Other versions
EP1217873B1 (fr
EP1217873A3 (fr
Inventor
Ralf Dr. Dorwarth
Martin Baier
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.)
EGO Elektro Geratebau GmbH
Original Assignee
EGO Elektro Geratebau GmbH
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 EGO Elektro Geratebau GmbH filed Critical EGO Elektro Geratebau GmbH
Publication of EP1217873A2 publication Critical patent/EP1217873A2/fr
Publication of EP1217873A3 publication Critical patent/EP1217873A3/fr
Application granted granted Critical
Publication of EP1217873B1 publication Critical patent/EP1217873B1/fr
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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/08—Foundations or supports plates; Legs or pillars; Casings; Wheels
    • F24C15/083—Anti-tip arrangements
    • 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
    • H05B2213/07—Heating plates with temperature control means

Definitions

  • the invention relates to a method and a device for detection the temperature of a cooking vessel according to the preamble of claims 1 and 9 and claim 10.
  • the cooking vessel is advantageously on a hotplate or heating plate, for example a glass ceramic plate, a preferably electrically operated heating device set up in the area of a heating zone of the heating device.
  • heating devices For heating food and other heating materials when cooking, Frying, deep frying or the like are nowadays often heating devices with in usually made of glass ceramic material, on which one or more cooking or heating zones are defined, the heating devices arranged below the hotplate are heated.
  • the heating devices can, for example, in In the form of electric radiant heaters or in the form of induction devices with one or more induction coils for inductive Heating the cooking vessels set up on the assigned cooking zone be trained.
  • the invention has for its object a method and an apparatus for recording the temperature of hotplates To create cooking vessels that have the disadvantages of the prior art Avoid technology. In particular, without limitation at Handling of the cooking vessels enables precise temperature measurement become.
  • the invention proposes a device the features of claims 1 and 9 and a method with the Features of claim 10. Preferred further developments are in the dependent claims.
  • the wording of all Claims become the content of the content by express reference Description made.
  • the invention is in the area of a heating zone to be monitored the top of the hotplate facing the cooking vessel at least one flat measuring element is provided, which the one Bottom of a cooking vessel to be set up facing and for touch contact provided with the bottom of the cooking vessel top whose area is normally a fraction of the total area of the assigned heating zone.
  • the temperature of this measuring element is determined, for which purpose at least one sensor is usually used for detection the temperature of the measuring element is provided. Because the measuring element is designed so that the normally largely flat or slightly arched bottom of a standing cooking vessel under the influence of the cooking vessel weight over a large area on the measuring element is pressed, the temperature of the measuring element arises due to of heat conduction usually quickly to the temperature of the bottom of the cooking vessel on.
  • the measuring element For fast, reliable temperature adjustment to ensure, the measuring element consists appropriately a good heat-conducting material and has a low heat capacity. In addition, there is a certain wear resistance or scratch resistance or abrasion resistance advantageous, so even after many years Operation no wear-related functional impairments are to be feared.
  • an exact temperature measurement on the cooking vessel is possible, as long as this is set up in such a way that a sufficiently good touch contact to the measuring element.
  • the measurement can be done in this Case largely independent of other properties of the cooking vessel be, for example, of the heat radiation ability of its Surface.
  • measuring elements according to the invention are largely standardized measuring points for the precise temperature determination of the cooking vessel temperature created in the bottom area of the cooking vessel.
  • the temperature of the measuring element from below through the hotplate he follows. This makes it possible to use temperature detection devices of the external measuring elements, for example, largely hermetically sealed space below the glass ceramic plate to accommodate a hob protected. On lines or The like, which lead to the measuring element on the top of the plate to be dispensed with. For example, directly below a measuring element a measuring resistance element on the inside of the hotplate be attached, for example by printing, with the under utilization the heat conduction through the hotplate the measuring element temperature can be determined. In particular, however, below the Hotplate, possibly at a distance from it, at least one infrared sensor be arranged, with the help of the temperature of the hotplate facing Bottom of the measuring element can be detected.
  • the hotplate should have sufficient permeability or transmission for the thermal radiation used for the measurement exhibit. Since the bottom of the measuring element is independent of the Cooking vessel properties one of the type of measuring element and possibly of the hotplate surface certain, defined emissivity for Such a system can be used with any type of cooking vessel work precisely without taking any special precautions on the cooking vessel itself to ensure a certain radiation ability Need to become. This allows users of such systems without special investments in the purchase of cooking vessels the advantages use a temperature measurement using infrared sensors.
  • a measuring element can for example by a on the top of the Hotplate self-adhesive material layer formed, for example, by using a thin-film process or a thick-film process applied material layer, especially a temperature-resistant Coat of paint.
  • Adhesion of the measuring element on the top of the hotplate reached be can also shape and / or thickness of the measuring element the procedure for the coating in a simple manner to the desired measuring element design can be adapted.
  • suitable layers of paint can be used, as in the usual decoration of glass ceramic surfaces become. The order can be placed in the same process step. at If necessary, metal particles can be added.
  • At least one measuring element by a separate piece of material, for example a piece a metal foil is formed, which with the help of suitable fasteners, for example by gluing on the top of the hotplate can be attached. This is especially true in the case of infrared temperature measurement from the bottom of the hotplate to an adequate one Emissivity and / or heat radiation transparency of the adhesive material to watch out for.
  • the top of the measuring element is the top of the Slightly protruding hotplate, i.e. opposite the hotplate top is sublime.
  • small protrusion heights are expediently between approximately 0.05 mm and about 0.2 mm, especially at about 0.1 mm.
  • the invention one or several reference measuring surfaces for infrared temperature measurement from Proposing out inside a ceramic hob also affects Heating devices with a temperature detection device according to the invention are equipped, in particular electric heating devices.
  • she is Particularly advantageous for use in induction hobs where the heat for heating up cooking vessels in the wall material of the cooking vessel itself, especially in the bottom of the cooking vessel inductively generated eddy currents.
  • Electric heating devices is the exact determination of the cooking vessel temperature useful as indirect temperature monitoring, for example by monitoring the hotplate temperature, may be inaccurate because there may be large temperature differences between the hotplate and the cooking vessel exist.
  • Inductive cooking systems are also possible Radiant heating systems are therefore particularly suitable because that's usually the case with radiant heating systems a measuring element heated directly from below by heat radiation is, so that there may be temperature differences to the cooking vessel temperature can result. It is also the case with inductive cooking systems Usually easier, below the hotplate, for example nearby an induction coil, one or more heat-sensitive infrared sensors protected because in this area compared to Radiant heating systems typically have significantly lower temperatures rule what the functionality and lifespan of Infrared sensors can improve.
  • the material of the hotplate can also be so be chosen to be more typical, especially in the temperature range Pot bottom temperatures, which are usually when cooking below approx. 140 ° and for example when frying at a maximum of 250 ° C 300 ° C, especially for the corresponding heat radiation is permeable.
  • Pot bottom temperatures which are usually when cooking below approx. 140 ° and for example when frying at a maximum of 250 ° C 300 ° C, especially for the corresponding heat radiation is permeable.
  • a transmissibility at higher temperatures, that is, at shorter wavelengths of heat radiation, such as, for example required for glass ceramic plates in radiant heating systems is not absolutely necessary, so the hotplate material in terms of its transmission properties optimally to the requirements can be coordinated during temperature detection.
  • the first drawing figure 1 shows a preferred embodiment in a schematic representation a temperature detection device according to the invention, the is installed in an induction hob.
  • Fig. 2 shows a top view to the induction hob on Fig. 1.
  • FIG. 1 shows a section of a electric stove, the top or worktop through a horizontal glass ceramic plate 2 is defined, the one or several hotplates or cooking or May have heating zones 3.
  • Heaters 4 are opposite the inside or bottom 5 of the plate 2 and are arranged in the inductive shown Electric heating device by multi-winded, flat in the example shown Induction coils 6 are formed, each with a short distance below the glass ceramic plate 2 are attached.
  • the induction coil shown as an example 6 is connected to a radio frequency generator, not shown Cooking appliance connected.
  • the flat induction coil 6 In the radially outer area of the flat induction coil 6 are cylindrical in their plate-facing area and funnel-shaped heat shields 7 attached, which ensure that inside and below the shield 7 the electromagnetic alternating field generated by the coil 6 is greatly weakened and radiating downwards from the area of the plate 2 Heat is largely shielded.
  • infrared sensors 8 for example with a infrared-sensitive diode, arranged on an electronic evaluation system 9 for processing the voltage signals provided by the infrared sensors are connected.
  • the evaluation electronics 9 can a circuit board can be arranged in the hermetically sealed Space below the glass ceramic plate 2 is attached and the electronic Components of an electronic control device for the electrical device 1 wears.
  • the shape and size of the induction coil 6 assigned, in the example circular heating zone 3 is in the interior of the hob a surrounding the induction coil with radial distance up to the Underside 5 of the glass ceramic plate 2 reaching ring 10 defined, the one that shields the electromagnetic radiation from the coil 2, electrically conductive material, such as aluminum can.
  • electrically conductive material such as aluminum can.
  • plane-parallel hotplate 2 can the outer limit of round heating zone 3 by a ring not shown from printed Decor color to be marked in order to provide a user with a correct, to allow the most central possible placement of cooking vessels.
  • hot plates 2 from one for light in the visible Spectrum of transparent material can border the cooking zone through the ring 10 visible in this case from above.
  • the Diameter in each case a fraction, for example about a tenth of the diameter of the cooking zone.
  • the color layer circles can for example in thin film or thick film technology e.g. by printing be applied and have typical thicknesses in the range of approx. 0.1 mm, so that the largely flat tops 18, 19, 20 of the color circles are evenly raised against the top of the plate 11. With the undersides 21, 22, 23 of the paint layers adhere firmly to the Top of the plate 11.
  • the centers of the color circles 15, 16, 17 lie with even distance from each other on a circle, its diameter can be about 10% to 30% smaller than the cooking zone diameter.
  • the raised layers of paint form a triangular arrangement, to the size of the cooking zone 3 adapted cooking vessel 25 is tilt-proof and wobble-free.
  • the cooking vessel 25 more or less centrally in the area of the cooking zone set up, it touches the largely flat or slightly dome-shaped curved cooking vessel bottom 26 the tops 18, 19, 20 of the Color dots 15, 16, 17 each over essentially the entire area, so that under the weight of the cooking vessel and the inside A flat contact pressure between the colored layer elements 15, 16, 17 and the bottom of the cooking vessel 26 is ensured.
  • the color layer circles that can be reliably attached in a cost-effective manner 15, 16, 17 form measuring elements of a temperature detection device, which allows the temperature of the cooking vessel, in particular of the cooking vessel base 26, in an economical manner to be determined reliably and precisely.
  • a temperature detection device which allows the temperature of the cooking vessel, in particular of the cooking vessel base 26, in an economical manner to be determined reliably and precisely.
  • Line of sight can be a connection that conducts heat radiation between the infrared sensor and the underside of the measuring element also using a or more mirrors suitable for reflecting infrared radiation and / or created with the aid of heat radiation-conducting optical fibers become.
  • a temperature detection according to the invention is particularly suitable good for automatic, sensor-supported cooking systems, at which the heating power of the heating devices assigned to each cooking zone depending on the temperature of the food or cooking vessel is controllable.
  • the sensed temperature can only to be displayed to an operator the cookware to enable gentle and effective cooking, roasting, deep-frying or the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Electromagnetism (AREA)
  • Ceramic Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Electric Stoves And Ranges (AREA)
  • Induction Heating Cooking Devices (AREA)
  • Control Of Resistance Heating (AREA)
  • Cookers (AREA)
  • Control Of High-Frequency Heating Circuits (AREA)
EP01128793A 2000-12-21 2001-12-04 Procédé et dispositif de détection de la température d'un ustensile de cuisine Expired - Lifetime EP1217873B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10064621A DE10064621A1 (de) 2000-12-21 2000-12-21 Verfahren und Vorrichtung zur Erfassung der Tenperatur eines Kochgefäßes
DE10064621 2000-12-21

Publications (3)

Publication Number Publication Date
EP1217873A2 true EP1217873A2 (fr) 2002-06-26
EP1217873A3 EP1217873A3 (fr) 2003-11-05
EP1217873B1 EP1217873B1 (fr) 2006-06-28

Family

ID=7668701

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01128793A Expired - Lifetime EP1217873B1 (fr) 2000-12-21 2001-12-04 Procédé et dispositif de détection de la température d'un ustensile de cuisine

Country Status (6)

Country Link
US (1) US20030206572A1 (fr)
EP (1) EP1217873B1 (fr)
AT (1) ATE332071T1 (fr)
AU (1) AU781345B2 (fr)
DE (2) DE10064621A1 (fr)
ES (1) ES2267657T3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1643807A1 (fr) * 2003-07-04 2006-04-05 Matsushita Electric Industrial Co., Ltd. Dispositif de chauffage par induction
EP2241822A2 (fr) * 2009-04-17 2010-10-20 BSH Bosch und Siemens Hausgeräte GmbH Plaque de recouvrement pour une plaque de cuisson
FR2965330A1 (fr) * 2010-09-23 2012-03-30 Jaeger Capteur pour inducteur ameliore
WO2013034528A1 (fr) * 2011-09-05 2013-03-14 BSH Bosch und Siemens Hausgeräte GmbH Dispositif pour appareil électroménager pourvu d'un capteur d'infrarouge

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101558682B (zh) * 2006-12-18 2012-05-09 松下电器产业株式会社 感应加热烹调器
SG171458A1 (en) 2008-12-03 2011-07-28 Halton Group Ltd Oy Exhaust flow control system and method
ES2356442B1 (es) * 2009-01-13 2012-03-13 Bsh Electrodomesticos España, S.A Campo de cocción con una placa de cubierta.
CA2875803C (fr) * 2012-06-07 2019-01-29 Oy Halton Group Ltd. Systemes, dispositifs et procedes d'extinction d'incendie
DE102012213831A1 (de) * 2012-08-03 2014-05-22 E.G.O. Elektro-Gerätebau GmbH Messeinrichtung und System
DE102013102112A1 (de) * 2013-03-04 2014-09-18 Miele & Cie. Kg Kocheinrichtung
DE102013102107A1 (de) * 2013-03-04 2014-09-18 Miele & Cie. Kg Kocheinrichtung und Verfahren zum Betreiben
ES2526622B1 (es) * 2013-07-09 2015-10-26 Bsh Electrodomésticos España, S.A. Dispositivo de aparato doméstico
ES2597752B1 (es) * 2015-07-20 2017-10-25 Bsh Electrodomésticos España, S.A. Dispositivo de campo de cocción
ITUB20154671A1 (it) * 2015-10-14 2017-04-14 Alessandro Condini Metodo per il controllo di una sorgente di calore appartenente a un apparato di cottura e apparato di cottura configurato per attuare detto metodo
CN107289470B (zh) * 2016-04-11 2019-06-14 众智光电科技股份有限公司 具有温度感测功能的瓦斯炉
US20180199401A1 (en) * 2017-01-09 2018-07-12 Nuwave, Llc Induction Wok

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3742179A (en) * 1971-12-29 1973-06-26 Gen Electric Induction cooking appliance including wireless transmission of temperature data
EP0779051A1 (fr) * 1995-12-12 1997-06-18 Bosch-Siemens HausgerÀ¤te GmbH Récipient pour une unité de cuisson contrÔlé par un capteur
DE19734960A1 (de) * 1997-08-13 1999-02-18 Ako Werke Gmbh & Co Kochzone
US5919385A (en) * 1995-01-07 1999-07-06 U.S. Phillips Corporation Cooking apparatus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8709051D0 (en) * 1987-04-15 1987-05-20 Emi Plc Thorn Thermochromic temperature sensor
DE19820108C2 (de) * 1998-05-06 2001-03-15 Schott Glas Anordnung eines wärmeleitenden keramischen Trägers mit einem Heizkörper als Kochzone in einer Aussparung einer Kochfläche

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3742179A (en) * 1971-12-29 1973-06-26 Gen Electric Induction cooking appliance including wireless transmission of temperature data
US5919385A (en) * 1995-01-07 1999-07-06 U.S. Phillips Corporation Cooking apparatus
EP0779051A1 (fr) * 1995-12-12 1997-06-18 Bosch-Siemens HausgerÀ¤te GmbH Récipient pour une unité de cuisson contrÔlé par un capteur
DE19734960A1 (de) * 1997-08-13 1999-02-18 Ako Werke Gmbh & Co Kochzone

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1643807A1 (fr) * 2003-07-04 2006-04-05 Matsushita Electric Industrial Co., Ltd. Dispositif de chauffage par induction
EP1643807A4 (fr) * 2003-07-04 2012-05-16 Panasonic Corp Dispositif de chauffage par induction
EP2241822A2 (fr) * 2009-04-17 2010-10-20 BSH Bosch und Siemens Hausgeräte GmbH Plaque de recouvrement pour une plaque de cuisson
FR2965330A1 (fr) * 2010-09-23 2012-03-30 Jaeger Capteur pour inducteur ameliore
WO2013034528A1 (fr) * 2011-09-05 2013-03-14 BSH Bosch und Siemens Hausgeräte GmbH Dispositif pour appareil électroménager pourvu d'un capteur d'infrarouge

Also Published As

Publication number Publication date
ES2267657T3 (es) 2007-03-16
ATE332071T1 (de) 2006-07-15
DE50110327D1 (de) 2006-08-10
AU9725901A (en) 2002-08-22
US20030206572A1 (en) 2003-11-06
DE10064621A1 (de) 2002-06-27
AU781345B2 (en) 2005-05-19
EP1217873B1 (fr) 2006-06-28
EP1217873A3 (fr) 2003-11-05

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