EP3503672B1 - Induktionskochfeld - Google Patents

Induktionskochfeld Download PDF

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Publication number
EP3503672B1
EP3503672B1 EP17208843.7A EP17208843A EP3503672B1 EP 3503672 B1 EP3503672 B1 EP 3503672B1 EP 17208843 A EP17208843 A EP 17208843A EP 3503672 B1 EP3503672 B1 EP 3503672B1
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EP
European Patent Office
Prior art keywords
sensor
cooktop
induction
movable
cooking
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
EP17208843.7A
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English (en)
French (fr)
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EP3503672A1 (de
Inventor
Çaglar Islek
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.)
Vestel Elektronik Sanayi ve Ticaret AS
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Vestel Elektronik Sanayi ve Ticaret AS
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Priority to EP17208843.7A priority Critical patent/EP3503672B1/de
Priority to TR2017/22204A priority patent/TR201722204A2/tr
Publication of EP3503672A1 publication Critical patent/EP3503672A1/de
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    • 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
    • H05B2213/03—Heating plates made out of a matrix of heating elements that can define heating areas adapted to cookware randomly placed on the heating plate
    • 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 induction cooktops.
  • the invention further relates to a method for operating an induction cooktop.
  • Induction cooktops also known as “induction hobs” or “induction stoves”
  • induction hobs induction hobs
  • Induction stoves typically use fixed induction coils in combination with complex circuit arrangements including, for example, current measuring elements, in order to detect the position and/or size of cooking vessels on a cooking surface.
  • Alternative sensor systems are based on multiple LED or light sensors, but such systems are very high cost.
  • the induction cooktop described includes a cooking zone, and a circuit arrangement for operating the cooking zone.
  • the circuit arrangement has a parallel circuit, in which two inductors are connected in a parallel manner.
  • Apparatus is configured to detect occupancy of at least one cooking sub-zone of the cooking zone by a food preparation vessel and includes a current measuring element which is connected in series to the parallel circuit.
  • US 4,334,135 discloses a utensil detection arrangement for an induction heating apparatus which provides a signal indicative of an off-centre position of a cooking utensil supported on a cooking surface which overlies an induction heating coil.
  • the detection arrangement comprises a conductive loop configuration located intermediate the heating coil and the cooking utensil in a plane parallel to the plane of the cooking surface and concentric with respect to the axis of the coil.
  • the conductive loop is linked with the magnetic flux generated by the induction heating coil, which flux changes as a result of the position of a cooking utensil with respect to the axis of the coil and thereby generates a signal which changes in amplitude as a result of utensil position.
  • US 5,714,739 discloses a control device particularly for induction cooking ranges with multiple heating units which comprise a plurality of induction coils.
  • the induction coils can be electrically parallel connectable to each other.
  • the device also comprises elements for engaging the induction coils connecting individual induction coils or pairs of induction coils to a single electric power converter, and elements for sensing the presence or the absence of a pot or the presence of an unadapted pot on a particular induction coil; the sensor elements are electrically connected to control means that select, on user's command, the induction coils to be activated and the power to be carried to each individual induction coil, and control the sending of shares of the power generated by the electronic converter to each active induction coil, at the same time limiting the periodic variations in the current absorbed from the mains, within the limits allowed by statutory provisions regarding so-called "flicker”.
  • WO 2008/101766 relates to a hob with a cooking area with a plurality of heating zones on which cooking utensils are positioned, with at least one movable heating element, which is arranged below the cooking area, and with an actuator for moving the at least one movable heating element. It is proposed that in order to design generic hobs to be more flexible, the hob be equipped with a control unit for actuating the actuator depending on at least one operating parameter.
  • JP 2009011401 discloses a modular kitchen with approach sensor groups disposed on a base plate for detecting a cooking container placed on a top board.
  • the approach sensor groups include a first sensor group constituted by a plurality of approach sensors provided on one end side across the coil unit in one direction, and a second sensor group consisting of a plurality of approach sensors disposed on the other end side.
  • the cooking container is detected by the approach sensor groups by moving the base plate, and the base plate is further moved toward the position of detection of the cooking container, simultaneously detected by at least two approach sensors constituting the first approach sensor group, or at least two approach sensors constituting the second approach sensor group.
  • JP 2009011400 discloses a custom kitchen with a top plate, IH heater coils, a horizontally moving means moving the IH heater coils horizontally, spaces formed according to the space where the IH heater coils can move at least by the horizontally moving means in the lower side of the top plate, and blowers cooling the IH heater coils via a cooling medium longitudinally according to the moving direction of the IH heater coils in the spaces.
  • the invention provides an induction cooktop (10) comprising:
  • the senor is a movable sensor (40).
  • an induction cooktop comprising:
  • the sensor is preferably a movable ultrasound sensor (40). It is further preferred that said movable ultrasound sensor may be mounted on a rail system (50).
  • the two or more movable induction coils (20, 22, 24, 26, 28) include coils of different sizes.
  • the cooktop (10) is operated to select a size of coil (20, 22, 24, 26, 28) and move that coil (20, 22, 24, 26, 28) to a selected location based on information from said sensor (40).
  • a plurality of induction coils (20, 22, 24, 26, 28) may be controlled by a single control (30) or by a single slider.
  • the cooktop (10) of the invention contains only one sensor (40), being a movable ultrasound sensor (40).
  • the cooktop (10) of the invention preferably includes a display unit, more preferably a touchscreen display unit.
  • Said display unit may preferably display (i) the location and/or (ii) the size of said cooking vessel (60) based on information from said sensor (40).
  • the invention provides a method for operating an induction cooktop (10) comprising:
  • said methods further comprises operating said cooktop to select a coil and move that coil to selected location based on information from said sensor.
  • Said methods may preferably further comprise operating said cooktop to select a size of coil.
  • FIG 1 shows a plan view of a cooktop 10 according to an embodiment.
  • the cooktop 10 comprises a substantially planar cooking surface 12 arranged to receive one or more cooking vessels (not shown in Figure 1 ).
  • a plurality of movable coils 20, 22, 24, 26, 28 are arranged beneath the cooking surface 12 and configured, in use, to move to specific locations along a rail system 50.
  • a movable ultrasound sensor 40 is also shown.
  • Control units 30 are shown.
  • a rail system 50 in a grid structure is illustrated, by which the induction coils may be moved and positioned where needed according to the position of the cooking vessels detected.
  • Figure 2 shows a side elevation of the cooktop 10 according to an embodiment.
  • a movable ultrasound sensor 40 is shown, under the cooking surface 12.
  • Figure 3 shows a plan view of the cooktop of figure 1 in use.
  • a cooking vessel 60 is shown on the substantially planar cooking surface 12.
  • a selected movable induction coil 28 is shown being moved below the cooking surface 12 to the location of the cooking vessel 60.
  • Figure 4 shows a side elevation of the cooktop of figure 3 , in use.
  • the cooking vessel 60 is shown on the cooking surface 12 with the movable induction coil 28 moving into position beneath the cooking surface 12.
  • the invention relates to induction cooktops 10 having a movable coil system (e.g. including movable induction coils 20, 22, 24, 26, 28 and rail system 50) and/or a movable sensor 40.
  • a movable coil system e.g. including movable induction coils 20, 22, 24, 26, 28 and rail system 50
  • a movable sensor 40 e.g. including movable induction coils 20, 22, 24, 26, 28 and rail system 50
  • the induction cooktop according to the invention includes two or more movable induction coils, and a sensor.
  • the induction cooktop according to the invention includes two or more induction coils and a movable sensor.
  • the induction cooktop according to the invention includes two or more movable induction coils and a movable sensor.
  • the induction cooktop includes a sensor for detecting a cooking vessel on the cooking surface, the location of the cooking vessel on the cooking surface, and the size of the cooking vessel.
  • the induction cooktop then operates the movable coil system based on the sensor information.
  • the induction cooktop selects the coil and moves the selected coil to the location of the cooking vessel.
  • the sensor detects the size of the cooking vessel in addition to its location.
  • the induction cooktop selects a size of coil based on the size of the cooking vessel. In embodiments having movable induction coils, the selected coil is then moved to the location of the cooking vessel.
  • the movable induction coils used in the induction cooktops of the invention differ from the fixed induction coils or fixed induction elements that are used in current induction cooktops in that they are not stationary.
  • the movable induction coils are mobile and are not limited to one particular position relative to the cooking surface.
  • the induction cooktop of the invention comprises a number of movable induction coils. These are movable under the cooking surface during operation of the induction cooktop. For example, using rails in a grid structure as shown in figure 1 .
  • the movable induction coils may be of essentially any shape, but are typically of a regular shape such as a shape that is approximately circular, oval or rectangular.
  • the induction cooktop includes movable induction coils having a variety of different sizes. There may be two or more coils, or groups of coils, of essentially the same size. Equally possibly, the coils may all be of different sizes.
  • the cooktop may include some coils of the same size as well as a number of coils of differing sizes.
  • the mobility of the movable induction coils provides for more efficient use of the cooking surface.
  • a higher proportion of the cooking surface may be used in comparison with conventional induction cooktops having fixed induction coils.
  • the induction coils are not movable, i.e. are immobile or fixed, there are typically also included a number of induction coils. These may be of essentially any shape, but are typically of a regular shape such as a shape that is approximately circular, oval or rectangular.
  • the induction cooktop includes induction coils having a variety of different sizes. There may be two or more coils, or groups of coils, of essentially the same size. Equally possibly, the coils may all be of different sizes.
  • the cooktop may include some coils of the same size as well as a number of coils of differing sizes.
  • the senor is preferably a movable sensor. More preferably it is a movable ultrasound sensor. It is preferred, in all aspects and embodiments of the invention, that only one sensor is used, which is a movable ultrasound sensor.
  • the movable ultrasound sensor may preferably be mounted on a rail system.
  • suitable rail systems typically may be provided by a balancing wheel.
  • the rotation of the wheel typically may be via a motor.
  • the motor typically keeps a constant rotation speed to ensure a constant sensor velocity.
  • the ultrasound sensor may have a maximum range that corresponds to the dimension of the cooktop. The sensor thus only detects cooking vessels as an obstacle.
  • the induction cooktop of the invention starts to operate when a control or slider is operated. Typically this may be a heating control or heating slider.
  • the operation of the control/slider starts movement of the ultrasound sensor. For example, it starts the motor which moves the rail system on which the sensor may be mounted.
  • the moving ultrasound sensor scans the heating surface of the cooktop in one dimension.
  • the sensor detects the position of a cooking vessel via a distance measurement. This information is sent to a controller.
  • the cooktop further comprises a controller.
  • the controller extracts the position of the cooking vessel by mapping the cooking surface.
  • the sensor also measures time and this is also recorded by the controller in order to extract the radius of the cooking vessel (if it is a circular vessel) or dimensions of base of the vessel (if another type of vessel). This can be achieved, in embodiments, by the contant speed of the sensor.
  • the distance measurement may be added to the radius or base dimension of the vessel in order to determine the surface area to be heated.
  • the controller determines this area by mapping.
  • the controller will select the coil having dimensions that are most suitable to provide energy efficiently over the necessary surface area to heat the cooking vessel detected.
  • the selected coil can be moved into position, for example, by rails in a grid structure under the cooking surface, as shown in figure 1 .
  • the cooktop according to the invention has a cooking surface that can be used efficiently. Further the cooktop of the invention may be used to heat more than four cooking vessels at the same time. Cooking vessels placed in empty areas are detected by the sensor and an appropriate coil will be designated and despatched by the controller.
  • the cooktop can be operated using only a single control/slider.
  • the heat level may be adjusted for a first cooking vessel.
  • Pushing the control or slider (as a button) records this level.
  • a second push (as a button) returns to adjustment mode such that it is possible to use the control/slider to adjust the heat level for a second cooking vessel.
  • This sequence can be repeated to adjust heat levels for each cooking vessel.
  • the cooktop can include a display unit.
  • a touchscreen display unit may be included.
  • said display unit visually depicts information determined by the sensor, for example location of a cooking vessel and/or its size.
  • said display unit is operable to provide user control of the induction cooktop.
  • a touchscreen display unit that allows for selection of the area of the induction cooktop to be heated. Control of the level of heat to be applied may be achieved, for example, by a further touchscreen function and/or use of a control dial, button, slider or similar unit in combination with the display unit and controller.
  • the invention further provides a method for operating an induction cooktop comprising: detecting a cooking vessel on a cooking surface by lateral movement of an ultrasound sensor; based on detection of location of said cooking vessel and detection of size of said cooking vessel, selecting at least one movable induction coil; and moving said at least one movable induction coil to location of said cooking vessel.
  • the disclosure further provides a method of operating an induction cooktop, not according to the invention, which comprises: providing one or more movable induction coils movable under a cooking surface; and/or providing a movable sensor for detecting a cooking vessel on said cooking surface, and operating said sensor to determine (i) the location and/or (ii) the size of said cooking vessel.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Induction Heating Cooking Devices (AREA)
  • Cookers (AREA)

Claims (9)

  1. Induktionskochfeld (10), umfassend:
    eine Kochoberfläche (12);
    zwei oder mehr bewegbare Induktionsspulen (20, 22, 24, 26, 28), die unter der Kochoberfläche (12) bewegbar sind;
    einen Sensor (40) zum Erfassen eines Kochgefäßes (60) auf der Kochoberfläche (12);
    wobei der Sensor (40) betrieben wird, um (i) die Position und (ii) die Größe des Kochgefäßes (60) zu bestimmen;
    und wobei das Kochfeld (10) betrieben wird, um eine Spule (20, 22, 24, 26, 28) auszuwählen und diese Spule (20, 22, 24, 26, 28) auf eine ausgewählte Position basierend auf Informationen von dem Sensor (40) zu bewegen;
    wobei die zwei oder mehr Induktionsspulen (20, 22, 24, 26, 28) Spulen unterschiedlicher Größen beinhalten und wobei das Kochfeld (10) betrieben wird, um eine Größe einer Spule (20, 22, 24, 26, 28) basierend auf Informationen von dem Sensor (40) auszuwählen.
  2. Kochfeld nach Anspruch 1, wobei der Sensor ein bewegbarer Sensor (40) ist.
  3. Kochfeld (10) nach Anspruch 2, wobei der bewegbare Sensor (40) ein bewegbarer Ultraschallsensor (40) ist.
  4. Kochfeld (10) nach einem der Ansprüche 2 bis 3, wobei der Sensor (40) auf einem Schienensystem (50) montiert ist.
  5. Kochfeld (10) nach einem der vorstehenden Ansprüche, wobei eine Vielzahl von Induktionsspulen (20, 22, 24, 26, 28) durch eine einzelne Steuerung (30) oder durch einen einzelnen Schieber gesteuert werden.
  6. Kochfeld (10) nach einem der vorstehenden Ansprüche, das nur einen Sensor (40) enthält, wobei der Sensor ein bewegbarer Ultraschallsensor (40) ist.
  7. Kochfeld (10) nach einem der vorstehenden Ansprüche, ferner umfassend eine Anzeigeeinheit, vorzugsweise eine Touchscreen-Anzeigeeinheit.
  8. Kochfeld (10) nach Anspruch 7, wobei die Anzeigeeinheit betriebsfähig ist, um (i) die Position und/oder (ii) die Größe des Kochgefäßes (60) basierend auf Informationen von dem Sensor (40) anzuzeigen.
  9. Verfahren zum Betreiben eines Induktionskochfeldes (10), umfassend:
    Erfassen eines Kochgefäßes (60) auf einer Kochoberfläche (12) durch seitliche Bewegung eines Ultraschallsensors (40);
    basierend auf einer Erfassung der Position des Kochgefäßes (60) und der Erfassung der Größe des Kochgefäßes (60), Auswählen mindestens einer bewegbaren Induktionsspule (20, 22, 24, 26, 28); und
    Bewegen der mindestens einen bewegbaren Induktionsspule (20, 22, 24, 26, 28) zu einer Position des Kochgefäßes (60).
EP17208843.7A 2017-12-20 2017-12-20 Induktionskochfeld Active EP3503672B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP17208843.7A EP3503672B1 (de) 2017-12-20 2017-12-20 Induktionskochfeld
TR2017/22204A TR201722204A2 (tr) 2017-12-20 2017-12-27 İndüksi̇yonlu ocak

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17208843.7A EP3503672B1 (de) 2017-12-20 2017-12-20 Induktionskochfeld

Publications (2)

Publication Number Publication Date
EP3503672A1 EP3503672A1 (de) 2019-06-26
EP3503672B1 true EP3503672B1 (de) 2022-08-10

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ID=60702338

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17208843.7A Active EP3503672B1 (de) 2017-12-20 2017-12-20 Induktionskochfeld

Country Status (2)

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EP (1) EP3503672B1 (de)
TR (1) TR201722204A2 (de)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4334135A (en) 1980-12-22 1982-06-08 General Electric Company Utensil location sensor for induction surface units
IT1281843B1 (it) 1995-01-25 1998-03-03 Meneghetti Ampelio & C S N C Dispositivo di controllo particolarmente per fornelli ad induzione multipiastra
ES2319031B1 (es) * 2007-02-21 2010-02-03 Bsh Electrodomesticos España, S.A. Campo de coccion con un elemento de calentamiento movible.
JP5064908B2 (ja) * 2007-06-30 2012-10-31 クリナップ株式会社 システムキッチン
JP2009011400A (ja) * 2007-06-30 2009-01-22 Cleanup Corp システムキッチン
ES2388028B1 (es) 2010-03-03 2013-08-23 Bsh Electrodomésticos España, S.A. Encimera de cocción con al menos una zona de cocción y procedimiento para accionar una encimera de cocción.
FR2966002B1 (fr) * 2010-10-07 2015-12-11 Fagorbrandt Sas Procede de commande en fonctionnement d'un ensemble d'inducteurs d'une table de cuisson a induction et table de cuisson a induction associee

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Publication number Publication date
TR201722204A2 (tr) 2019-07-22
EP3503672A1 (de) 2019-06-26

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