EP2741571B1 - Dispositif de champ de cuisson - Google Patents

Dispositif de champ de cuisson Download PDF

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Publication number
EP2741571B1
EP2741571B1 EP13194841.6A EP13194841A EP2741571B1 EP 2741571 B1 EP2741571 B1 EP 2741571B1 EP 13194841 A EP13194841 A EP 13194841A EP 2741571 B1 EP2741571 B1 EP 2741571B1
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EP
European Patent Office
Prior art keywords
electrode
touch
cooking zone
control unit
sensitive control
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.)
Active
Application number
EP13194841.6A
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German (de)
English (en)
Other versions
EP2741571A1 (fr
Inventor
Jorge Alaman Aguilar
Miguel Angel Bunuel Magdalena
Francisco Javier Ester Sola
Jose Andres Garcia Martinez
Fernando Planas Layunta
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Hausgeraete GmbH
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Publication date
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Publication of EP2741571A1 publication Critical patent/EP2741571A1/fr
Application granted granted Critical
Publication of EP2741571B1 publication Critical patent/EP2741571B1/fr
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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
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/08—Arrangement or mounting of control or safety devices
    • F24C7/082—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination
    • F24C7/083—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination on tops, hot plates
    • 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

Definitions

  • the invention relates to a hob device according to the preamble of claim 1.
  • Hob devices with capacitive pan detection systems are known. Furthermore, hob devices with touch-sensitive control units are known.
  • the object of the invention is in particular to provide a generic device with improved properties in terms of component savings.
  • the object is achieved by the features of claim 1, while advantageous embodiments and modifications of the invention can be taken from the dependent claims.
  • the invention is based on a cooktop device, in particular an induction cooktop device, with at least a first cooking zone defined by a first heating element, with a first electrode which significantly changes its capacity as a function of a cookware occupancy of the first cooking zone, and with at least one touch-sensitive operating unit wherein the touch-sensitive operating unit evaluates the electrode properties of the first electrode in at least one operating mode.
  • the touch-sensitive operating unit has a second electrode, which changes its capacity significantly in response to an operation by an operator and which is electrically conductively connected to the first electrode.
  • the electrode is arranged on and / or on a rear side, in particular a side facing away from an operator in an operating state, of a plate unit, in particular a hob plate.
  • a "heating element” is to be understood in particular an element which is intended to transmit power, in particular in the form of electromagnetic radiation and / or heat, to a cooking utensil.
  • the heating element transmits in at least one operating mode a power of at least 100 W, in particular at least 300 W, advantageously at least 1000 W, particularly advantageously at least 2000 W, to a cooking utensil.
  • the hob device comprises at least one, in particular from glass ceramic, borosilicate glass and / or a composite material formed, hob plate, wherein the heating unit is advantageously arranged at least in a standard operating orientation under the cooking plate, preferably directly applied to this.
  • the cooking zone is formed by a region of action of the heating element above the hob plate.
  • a "range of action" of a heating element should be understood to mean in particular a local area in which an energy flow corresponds to at least 20%, in particular at least 50%, advantageously at least 80% of a maximum of an energy flow of the heating element.
  • the heating element is designed as an induction heating element and converts in an operating state a high-frequency electrical current having a frequency between 10 kHz and 150 kHz, preferably between 20 kHz and 100 kHz, in an alternating magnetic field, which in a set up, advantageously metallic, preferably ferromagnettica, cooking utensil is converted into heat.
  • the induction heating element is formed by a wound electrical conductor, advantageously a stranded conductor.
  • the heating element forms a round, alternatively an oval, an at least substantially angular or any other shape, cooking zone.
  • the heating element is designed as a radiation, resistance or Halogenheizelement.
  • An "electrode” should in particular be understood to mean an electrical conductor which forms an electric field in an operating state with a counterelectrode, which is formed in particular by the earth itself.
  • the electrode is used as a ring electrode, in particular also with several, advantageously concentric, rings formed.
  • the first electrode is designed as a surface electrode.
  • the first electrode it is conceivable for the first electrode to have a star-shaped form or another form which appears suitable to a person skilled in the art. Furthermore, it is conceivable that the electrode is formed by the heating element itself. In particular, the first electrode and / or the first electrode comprises at least 20%, advantageously at least 50%, preferably at least 80%, of the first cooking zone. The first electrode is preferably arranged in a vicinity of the first cooking zone, in particular under the hob plate, preferably between the heating element and the hob plate. A "significant" change is to be understood as meaning, in particular, a change that goes beyond a purely measured value fluctuation, which is triggered in particular by a measurement tolerance and / or by temperature fluctuations.
  • the capacity changes as a function of a cooking utensil coverage of the cooking zone by a factor of at least 1.1, in particular at least 1.5 advantageously at least 2, more preferably at least 5, preferably at least 8.
  • the capacitance of the electrode changes by in one Cookware arranged close to the electrode, since the dielectric properties of the cooking utensil differ from the air present in the absence of cooking utensils.
  • a "touch-sensitive operating unit” should be understood in particular to mean a unit which has at least one touch-sensitive operating element and at least one evaluation electronics.
  • the touch-sensitive operating unit has at least one control unit, which is provided in particular at least to control and / or regulate heating powers of the cooking zone.
  • a "touch-sensitive operating element” is to be understood in particular as an operating element which has at least one physical characteristic, preferably at least one capacity, when operated by an operator, preferably when a finger or the like is brought to an area of action of the operating element, preferably a physical contact is unnecessary, changes.
  • the evaluation electronics determines in at least one operating state a parameter dependent on the physical parameter of the touch-sensitive operating element or the capacitance of the at least first electrode and / or the physical characteristic per se.
  • the transmitter has at least one auxiliary circuit, in particular a bridge circuit and / or a resonant circuit, in particular a filter, in particular a high, low or band pass, on, in and / or on which the touch-sensitive control element and / or at least the first electrode is arranged.
  • the evaluation electronics preferably evaluate a voltage and / or a current which is present in the auxiliary circuit and / or flows.
  • a “conductive connection” is to be understood in particular a compound which has an ohmic resistance of less than 100 ohms, in particular less than 30 ohms, advantageously less than 10 ohms, particularly advantageously less than 3 ohms, preferably less than 1 ohm.
  • the conductive connection has a dummy resistance which, independently of operating state, is at most 100 V / A, in particular at most 30 V / A, advantageously at most 10 V / A, particularly advantageously at most 3 V / A, preferably at most 1 V / A.
  • a reactive resistance of the conductive connection is preferably at most 200%, in particular at most 100%, advantageously at most 50%, preferably at most 25%, of an ohmic resistance of the conductive connection.
  • the inventive design in particular a simple control can be achieved.
  • a component-saving design can be achieved.
  • a component-saving design and / or improved efficiency can be achieved, since in particular an identical evaluation circuit can evaluate both electrodes together.
  • At least the first electrode is designed as a cooktop plate coating.
  • a "cooktop panel coating” is to be understood in particular an element which is arranged on one side, preferably a rear side, of a cooktop panel, which preferably has a thickness which less than 0.5 mm, in particular less than 0.1 mm, advantageously less than 50 microns, and is advantageously materially connected to the hob plate.
  • the cooktop panel coating is applied directly to a base body of the cooktop panel, which in particular makes up at least 80%, in particular at least 90%, preferably at least 98%, of the cooktop panel.
  • At least one, in particular a cohesive connection-improving coating is arranged between the cooktop panel coating and the cooktop panel main body.
  • a space-saving design can be achieved.
  • a galvanically separated from the heating elements embodiment can be achieved.
  • the electrode is printed.
  • the electrode is applied to the cooktop panel by a screen printing method.
  • the electrode is formed from a material which is formed by curing, in particular drying, of a liquid which is formed by a carrier liquid mixed with conductive, in particular metallic, pigments.
  • the electrode is applied by a vapor deposition method, in particular a PVD and / or CVD method, in particular using a suitable mask. In particular, a cost-saving design can be achieved.
  • the touch-sensitive operating unit automatically activates the first cooking zone in at least one operating mode when a set cooking utensil is detected by means of the first electrode.
  • An "activation" of a cooking zone is to be understood in particular to mean a process which releases at least one input of a heating power for the cooking zone, wherein in particular a power of the cooking zone is set to a value of preferably 0 W until a higher power and / or power level by an operator, in particular via further touch-sensitive input elements, is entered.
  • the touch-sensitive operating unit sets a power level of the heating unit to a value greater than 0 W, in particular a value corresponding to 50% of a maximum heating power of the cooking zone when activating the cooking zone.
  • a power level when an automatic activation of the cooking zone is set by an operator, in particular in a basic device setting, is pre-configurable.
  • the touch-sensitive operating unit is provided to estimate a size of the installed cooking utensil based on a strength of a capacity change, in particular being intended to prevent activation of the cooking zone when the capacity change and thus the cooking utensil size is below a threshold value.
  • a simple, time-saving and / or user-friendly control can be achieved.
  • the touch-sensitive operating unit activates the first cooking zone in at least one operating mode when an actuation of an operator is detected by means of the second electrode.
  • the first and second electrodes are shaped such that they cause at least substantially equal capacitance changes in operation or placement of a cooking utensil.
  • capacitance changes of the first electrode may be significantly greater than capacitance changes of the second electrode, whereby the touch-sensitive operating unit is made possible a distinction of setting up a Gargeschirrs and a bringing a finger.
  • a control unit which controls and / or regulates an inductive heating element associated with the cooking zone detects occupancy of the cooking zone due to a decrease in power and, in the case of an at least substantially unoccupied cooking zone, delays activation of the cooking zone until a waiting time has elapsed and / or has been reached another occupancy signal is received via one of the two electrodes.
  • a variable operation can be enabled.
  • an operator may be enabled in this manner to determine a cooking zone's performance before setting up a cooking utensil.
  • At least one conductive connection between the first electrode and the touch-sensitive control unit is electrically shielded.
  • a conductive connection is "shielded", it should be understood in particular that a capacitance of the conductive connection itself does not change or only slightly changes when a cooking utensil is placed in its vicinity.
  • an electrical conductor which is in particular grounded, is arranged in a near zone, in particular at least on both sides, of the conductive connection.
  • the conductive connection and / or the electrical conductor are also as Coated plate coating formed and / or printed.
  • a “near zone” is to be understood in particular a distance range of less than 2 mm, in particular less than 1 mm, preferably less than 0.5 mm, to the conductive connection.
  • a reliable operation can be achieved.
  • a misdetection can be avoided.
  • FIG. 1 shows an induction cooktop designed according to the invention, hob 10 with an induction cooktop formed according to the invention cooking hob device 12 in a schematic view from above.
  • the hob device 12 has four, each a cooking zone 22, 24, 26, 28 forming, heating elements.
  • the heating elements are designed as induction heating elements and arranged below a hob plate 14.
  • the cooktop device 12 has a first electrode 32, which significantly changes its capacity as a function of a cookware occupancy of the first cooking zone 22.
  • the cooktop device 12 has a third electrode 34, which significantly changes its capacity depending on a cookware occupancy of the second cooking zone 24, a fifth electrode 36, which significantly changes its capacity in response to a cookware occupancy of the third cooking zone 26, and a seventh electrode 34, which significantly changes its capacity in response to a cookware occupancy of the fourth cooking zone 28.
  • the hob device 12 has a touch-sensitive control unit 40.
  • the touch-sensitive operating unit 40 evaluates the electrode properties of the first, third, fifth and seventh electrodes 32, 34, 36, 38 in operating modes in which the cooktop 10 is switched on, ie supplied with power, and the corresponding cooking zone 22, 24, 26, 28 is inactive. Alternatively, it is conceivable that the electrode properties are evaluated independently of an activity of the associated cooking zone 22, 24, 26, 28.
  • the first, third, fifth and seventh electrodes 32, 34, 36, 38 are via conductive connections 33, 35, 37, 39 with the touch-sensitive Operating unit 40 connected.
  • Touch-sensitive operating unit 40 has touch-sensitive operating elements formed as electrodes 42, 44, 46, 48, 49.
  • a second electrode 42 of the operating unit 40 which significantly changes its capacity in response to an operator's operation, is electrically conductively connected to the first electrode 32 via a first one of the conductive connections 33.
  • a fourth electrode 44 of the operating unit 40 which changes its capacity significantly in response to an operation by an operator, is electrically conductively connected to the third electrode 34 via a second one of the conductive connections 35.
  • a sixth electrode 46 of the operating unit 40 which changes its capacity significantly in response to an operation by an operator, is electrically conductively connected to the fifth electrode 36 via a third of the conductive connections 37.
  • An eighth electrode 48 of the operating unit 40 which significantly changes its capacity in response to an operation by an operator, is electrically conductively connected to the seventh electrode 38 via a fourth one of the conductive connections 39.
  • the electrodes 32, 34, 36, 38, 42, 44, 46, 48 and the conductive connections 33, 35, 37, 39 are designed as hob plate coating.
  • the electrodes 32, 34, 36, 38, 42, 44, 46, 48 and the conductive connections 33, 35, 37, 39 are printed on an underside of the hob plate 14.
  • the conductive connections 33, 35, 37, 39 between the electrodes 32, 34, 36, 38 and the control unit 40 are electrically shielded.
  • the conductive connections 33, 35, 37, 39 have a width of 100 ⁇ m. On both sides of the conductive connections 33, 35, 37, 39 are printed at a distance of 100 microns electrical conductors having a width of 300 microns.
  • the first electrode 32 is formed as a circular ring electrode, wherein an outer diameter is only slightly smaller than a diameter of the cooking zone 22.
  • the third electrode 34 is formed as a double oval ring electrode, which is arranged completely within the cooking zone 24.
  • the fifth electrode 36 is formed as a circular area electrode, which fills the cooking zone 26 to 50%.
  • the seventh Electrode 38 is formed as a cross-shaped electrode which extends through the entire cooking zone 28.
  • the touch-sensitive operating unit 40 activates the corresponding cooking zone 22, 24, 26, 28 in an operating mode when a set cooking utensil is detected by means of the corresponding first, third, fifth or seventh electrode 32, 34, 36, 38.
  • the touch-sensitive operating unit 40 activates the corresponding cooking zone 22, 24, 26, 28 in an operating mode when an operator's operation is detected by means of the corresponding second, fourth, sixth and eighth electrodes 42, 44, 46, 48, respectively.
  • an operator can control a heating power of the cooking zone 22, 24, 26 via two touch-sensitive operating elements assigned to the respective cooking zone 22, 24, 26, 28, which are formed by electrodes 49, 28 zoom in and out.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Induction Heating Cooking Devices (AREA)
  • Electric Stoves And Ranges (AREA)

Claims (9)

  1. Système de table de cuisson, en particulier système de table de cuisson à induction, comprenant au moins une première zone de cuisson (22, 24, 26, 28) définie par un élément chauffant, une première électrode (32, 34, 36, 38) qui change sa capacité de manière significative en fonction de l'occupation de la première zone de cuisson (22, 24, 26, 28) par un récipient de cuisson, et au moins une unité de commande (40) tactile, l'unité de commande (40) tactile évaluant les propriétés d'électrode de la première électrode (32, 34, 36, 38) dans au moins un mode de fonctionnement, caractérisé en ce que l'unité de commande (40) tactile comporte une seconde électrode (42, 44, 46, 48) qui change sa capacité de manière significative en fonction d'un actionnement par un utilisateur et qui est reliée de manière électriquement conductrice à la première électrode (32, 34, 36, 38).
  2. Système de table de cuisson selon la revendication 1, caractérisé en ce qu'au moins la première électrode (32, 34, 36, 38) est réalisée comme revêtement de plaque de la table de cuisson.
  3. Système de table de cuisson selon la revendication 2, caractérisé en ce qu'au moins la première électrode (32, 34, 36, 38) est imprimée.
  4. Système de table de cuisson selon l'une des revendications précédentes, caractérisé en ce que l'unité de commande (40) tactile active la première zone de cuisson (22, 24, 26, 28) dans au moins un premier mode de fonctionnement, lorsqu'un récipient de cuisson posé est détecté par la première électrode (32, 34, 36, 38).
  5. Système de table de cuisson selon l'une des revendications précédentes, caractérisé en ce que l'unité de commande (40) tactile active la première zone de cuisson (22, 24, 26, 28) dans au moins un premier mode de fonctionnement, lorsqu'un actionnement d'un utilisateur est détecté par la seconde électrode (42, 44, 46, 48).
  6. Système de table de cuisson selon l'une des revendications précédentes, caractérisé en ce qu'au moins une liaison conductrice (33, 35, 37, 39) entre la première électrode (32, 34, 36, 38) et l'unité de commande (40) tactile est pourvue d'un blindage électrique.
  7. Table de cuisson avec un système de table de cuisson (12) selon l'une des revendications précédentes.
  8. Procédé de fonctionnement d'un système de table de cuisson (12) selon l'une des revendications 1 à 6 comprenant au moins une première zone de cuisson (22, 24, 26, 28) définie par un élément chauffant, une première électrode (32, 34, 36, 38) dont la capacité change de manière significative en fonction de l'occupation de la première zone de cuisson (22, 24, 26, 28) par un récipient de cuisson, et au moins une unité de commande (40) tactile, les propriétés d'électrode de la première électrode (32, 34, 36, 38) étant évaluées par l'unité de commande (40) tactile dans au moins un mode de fonctionnement, caractérisé en ce que l'unité de commande (40) tactile comporte une seconde électrode (42, 44, 46, 48) dont la capacité change de manière significative en fonction d'un actionnement par un utilisateur et qui est reliée de manière électriquement conductrice à la première électrode (32, 34, 36, 38).
  9. Procédé de fabrication d'un système de table de cuisson (12) selon l'une des revendications 1 à 6 comprenant au moins une première zone de cuisson (22, 24, 26, 28) définie par un élément chauffant, une première électrode (32, 34, 36, 38) et au moins une unité de commande (40) tactile, caractérisé en ce que l'unité de commande (40) tactile comporte une seconde électrode (42, 44, 46, 48) qui est reliée de manière électriquement conductrice à la première électrode (32, 34, 36, 38).
EP13194841.6A 2012-12-05 2013-11-28 Dispositif de champ de cuisson Active EP2741571B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES201231892 2012-12-05

Publications (2)

Publication Number Publication Date
EP2741571A1 EP2741571A1 (fr) 2014-06-11
EP2741571B1 true EP2741571B1 (fr) 2017-01-11

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EP13194841.6A Active EP2741571B1 (fr) 2012-12-05 2013-11-28 Dispositif de champ de cuisson

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3316663B1 (fr) * 2016-10-25 2019-09-11 Electrolux Appliances Aktiebolag Plaque de cuisson à induction et procédé de commande d'une telle plaque
EP3478027B1 (fr) * 2017-10-30 2020-07-15 Vestel Elektronik Sanayi ve Ticaret A.S. Cuiseur et procédé de fonctionnement d'un cuiseur

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29521593U1 (de) * 1995-02-21 1997-10-16 Thielmann AG KG, 35708 Haiger Herdmulde
US6184501B1 (en) * 1999-09-23 2001-02-06 Cherry Gmbh Object detection system
DE102004011749A1 (de) * 2004-03-02 2005-09-15 E.G.O. Elektro-Gerätebau GmbH Elektronisch gesteuertes Kochfeld mit mehreren Kochstellen und Verfahren zum Betrieb eines solchen Kochfeldes

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
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