EP3490338A1 - Induktionsherd, verfahren zum betrieb eines induktionsherdes und steuergerät für einen induktionsherd - Google Patents

Induktionsherd, verfahren zum betrieb eines induktionsherdes und steuergerät für einen induktionsherd Download PDF

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Publication number
EP3490338A1
EP3490338A1 EP17203147.8A EP17203147A EP3490338A1 EP 3490338 A1 EP3490338 A1 EP 3490338A1 EP 17203147 A EP17203147 A EP 17203147A EP 3490338 A1 EP3490338 A1 EP 3490338A1
Authority
EP
European Patent Office
Prior art keywords
cooking
induction
sensors
induction cooker
cooker
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
EP17203147.8A
Other languages
English (en)
French (fr)
Other versions
EP3490338B1 (de
Inventor
Yusuf AK
Mert Serdar BÍLGÍN
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
Original Assignee
Vestel Elektronik Sanayi ve Ticaret AS
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.)
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Publication date
Application filed by Vestel Elektronik Sanayi ve Ticaret AS filed Critical Vestel Elektronik Sanayi ve Ticaret AS
Priority to EP17203147.8A priority Critical patent/EP3490338B1/de
Priority to TR2017/19171A priority patent/TR201719171A2/tr
Publication of EP3490338A1 publication Critical patent/EP3490338A1/de
Application granted granted Critical
Publication of EP3490338B1 publication Critical patent/EP3490338B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/12—Cooking devices
    • H05B6/1209—Cooking devices induction cooking plates or the like and devices to be used in combination with them
    • H05B6/1245—Cooking devices induction cooking plates or the like and devices to be used in combination with them with special coil 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
    • 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 present disclosure relates to an induction cooker, to a method for operating an induction cooker and to a controller for an induction cooker.
  • a cooking vessel When cooking using an induction cooker or a cooker having direct heating elements, it is beneficial for a cooking vessel to be positioned accurately over an induction heating coil or direct heating element to ensure an intended heating effect. However, if a cooking vessel is not, or cannot, be accurately positioned then it is known, in the field of induction cookers in particular, to provide movable induction cooking coils.
  • CN 104540260 A discloses an arrangement comprising a main heating coil and four auxiliary heating coils mounted in sliding grooves on a heating base plate. Adjusting rods enable the positions of the main heating coil and auxiliary heating coils to be adjusted within their sliding grooves to ensure uniform heating of a cooking vessel.
  • an induction cooker comprising:
  • the induction cooker according to this first aspect is therefore able automatically to compensate for imprecise placement of a cooking vessel upon a cooking surface within a range of movement of an induction cooking coil beneath the cooking surface. This ensures that the cooking vessel is heated with the intended level of power.
  • the plurality of sensors comprise a plurality of light sensors for sensing light incident at a respective position on the cooking surface.
  • the light may for example be ambient light incident upon the cooking surface.
  • the induction cooker comprises a plurality of light sources arranged to emit light detectable by the plurality of light sensors. In this way, ambient light need not be relied upon for the detection of a cooking vessel.
  • the plurality of light sensors are arranged such that placement of a cooking vessel upon the cooking surface inhibits the passage of incident light to one or more of the plurality of light sensors. In this way, any sensor not receiving light indicates that a cooking vessel is present on the cooking surface at a position above the sensor.
  • the incident light may be incident ambient light or incident light emitted by a plurality of light sources provided on the cooker.
  • the plurality of light sensors and the plurality of light sources are arranged such that placement of a cooking vessel upon the cooking surface reflects the emitted light towards one or more of the plurality of light sensors. In this way, any sensor receiving reflected light indicates that a cooking vessel is present on the cooking surface at a position above the sensor.
  • the plurality of sensors comprise one or more electromagnetic sensors.
  • the controller is configured to determine a centre position of a group of one or more of the plurality of sensors indicating that a cooking vessel is present and thereby to control the mechanical system to align a centre of the cooking coil with the determined centre position of the group of sensors. In this way the positioning of induction cooking coils of different sizes may be achieved under cooking vessels of different sizes without needing to know the actual size of either.
  • the mechanical system comprises an arrangement of one or more rails or arms linked to a respective actuator to move the induction cooking coil under the control of the controller.
  • the mechanical system comprises a position sensor arranged to output a signal indicative of the position of the induction cooking coil and wherein the controller is arranged to receive signals from the position sensor. In this way the controller is able to monitor the position of the cooking coil as it moves.
  • the induction cooker comprises a plurality of induction cooking coils of which at least two are movable by a respective said mechanical system each within a respective region beneath the cooking surface of the cooker.
  • the respective regions may overlap such that any one of the at least two movable cooking coils may be positioned beneath a cooking vessel placed within the overlap of the respective regions.
  • a method for operating an induction cooker having an induction cooking coil movable beneath a cooking surface and one or more sensors for indicating the presence of a cooking vessel at a respective position when placed upon the cooking surface, the method comprising determining from indications received from the one or more sensors a position of a cooking vessel on the cooking surface and controlling movement of the induction cooking coil to a position beneath the cooking surface substantially coincident with the determined position.
  • the induction cooker comprises two or more movable induction cooking coils and the method comprises determining the position of each of the two or more coils and controlling movement of the two or more coils to avoid a conflict in their respective positions.
  • the method comprises receiving an indication from a user of a power level required for cooking, and selecting a respective one of the two or more movable induction cooking coils to move to the determined position of a cooking vessel.
  • a controller for an induction cooker configured to implement a method for operating an induction cooker a described above according to the second aspect disclosed herein.
  • FIG. 1 there is shown schematically an induction cooker 5 in a plan view, comprising four induction cooking coils 10, 15, 20, 25, shown in an evenly spaced arrangement, mounted on a mechanical system (not shown in Figure 1 ).
  • the mechanical system enables independent movement and positioning of each of the four induction cooking coils 10-25 within a respective region beneath a cooking surface 30.
  • each cooking coil 10-25 may be positioned by movement along a respective supporting rail and/or by rotation of a supporting arm about a pivot which may itself be movable along the rail or fixed.
  • the rail may for example be straight or curved.
  • Movement of each induction cooking coil 10-25 may be achieved for example using a connecting cord and pulley arrangement or a system of levers and/or gears, movable by respective actuators, for example actuators comprising electric motors, operating under the control of a controller.
  • the actuators may cause a supported cooking coil 10-25 to travel along a respective rail or to move by rotating a respective supporting arm about a pivot for example.
  • All four induction cooking coils 10-25 shown in Figure 1 are indicated as being movable by the principles to be described. However, in another example arrangement of two or more cooking coils 10-25, at least one of the cooking coils 10-25 may be fixed and the other or others movable. Movement of each movable induction cooking coil 10-25 may be constrained by the supporting mechanical system to move within a respective region beneath the cooking surface 30, an example of which will now be described with reference to Figure 2 .
  • an example arrangement of induction cooking coils 10-25 is shown as may be achieved with the mechanical system of rails and/or arms in the cooker 5.
  • a region 40, 45, 50, 55 may be marked upon the cooking surface 30 to indicate the extent of a region within which a cooking vessel may be placed to receive optimal heating from a respective induction cooking coil 10, 15, 20, 25.
  • the marked regions may overlap.
  • the regions 40-55 correspond to the extent of a rail or length of a supporting arm in the mechanical system supporting a respective cooking coil 10-25.
  • the controller may be configured take account of the positions of the other cooking coils 10-25 when moving one cooking coil 10-25 to ensure that there is no conflict in the positioning of any two cooking coils 10-25, if such is possible due to the overlap of the regions 40-55.
  • the induction cooker 5 is able to detect the position of a cooking vessel upon the cooking surface 30 and to move a respective cooking coil 10-25 into position beneath the cooking vessel automatically.
  • An arrangement for detecting the position of a cooking vessel will now be described with reference to Figure 3 , Figure 4 and Figure 5 .
  • the example induction cooker 5 of Figure 2 is shown with an example of an underlying arrangement of the induction cooking coils 10-25.
  • an array of photoelectric or other type of light sensors 50 which may be mounted beneath the cooking surface 30 or embedded within the cooking surface 30.
  • the sensors 50 are sensitive to the intensity of light, for example of light of visible or infra-red wavelengths, reaching the sensors 50.
  • a cooking vessel placed upon the cooking surface 30 prevents ambient light, or light emitted from light sources associated with the cooker above the cooking surface 30 reaching those photoelectric sensors 50 located beneath the vessel.
  • the sensors 50 may reflect light incident upon and reflected by the cooking vessel from below the cooking surface 30.
  • the sensors 50 may comprise infra-red or visible light sensors each having an associated infra-red or visible light source.
  • the light sensor is arranged to sense light emitted by the associated light source when reflected from the underside of a cooking vessel when placed above the light sensor upon the cooking surface 30.
  • the sensors 50 may comprised electromagnetic sensors.
  • a controller 70 of the induction cooker 5 may be connected to each of the photoelectric sensors 50, for example via a respective analogue to digital converter (ADC), and configured to sense the respective light levels at each sensor 50.
  • the controller 70 may be configured to determine which of the sensors 50 in the array of sensors 50 is receiving little or no light from above the cooking surface 30 and to determine a position approximately central amongst those unilluminated sensors 50. The determined central position represents an approximate centre of the region occupied by a cooking vessel placed upon the cooking surface 30.
  • the controller 70 may determine which of the sensors 50 is receiving reflected infra-red light and determine therefrom the position of a cooking vessel.
  • the controller 70 may energise one or more actuators of a rail/arm mechanical system 75, 80, 85, 90 of the respective cooking coil 10-25 to move the cooking coil 10-25 to a position coincident with the determined position of the cooking vessel.
  • the one or more actuators may have associated position sensors to enable the controller 70 to determine the extent of movement of the respective cooking coil 10-25 and so determine when the cooking coil 10-25 reaches the determined position.
  • the controller 70 may receive position signals from position sensors associated with the rail/arm systems of the other cooking coils 10-25 and so determine the existing positions of the other cooking coils 10-25.
  • the controller 70 may move the potentially conflicting cooking coil 10-25 to a non-conflicting position, if not already in use with another cooking vessel. Any unresolvable conflicts may be indicated by the controller 70 in an alert to the user to prompt a repositioning of one or more cooking vessels on the cooking surface 30.
  • a cooking vessel If a cooking vessel is positioned within an overlapping area of two of the regions 40-55, then it may be heated by either of two induction cooking coils 10-25, for example by a low power coil 15, 25 or a high power coil 10, 20.
  • the user may select a required power level and the controller 70 may select a cooking coil 10-25 appropriate to the selected power level and to the determined position of the cooking vessel and position the selected cooking coil 10-25 beneath the cooking vessel.
  • the photoelectric sensors 50 may detect the level of ambient light reaching the cooking surface 30 or they may be arranged to detect light supplied from above the cooking surface 30 by a light source associated with the induction cooker.
  • a light source associated with the induction cooker An example arrangement for a light source associate with the cooker will now be described with reference to Figure 5 .
  • the induction cooker 5 of Figure 3 is reproduced with the addition of light sources 60 mounted around a perimeter section 65 of the induction cooker 5, surrounding the cooking surface 30.
  • Light emitted by at least some of the light sources 60 is detectable by each of the photoelectric sensors 50 unless a cooking vessel is placed upon the cooking surface 30 and prevents that light reaching respective sensors 50.
  • the controller 70 it is not necessary for the controller 70 to rely upon the sensors 50 detecting the brightness of ambient light in order to determine the position of a cooking vessel, using instead a system of illumination associated with the induction cooker 5.
  • the light emitted by the light sources 60 may be within a predetermined range of wavelengths, for example in a visible or infra-red range of wavelengths.
  • the photoelectric sensors 50 may be selected for their sensitivity to light of the wavelengths emitted by the light sources 60.
  • the light sources 60 may for example be energised by the controller 70 when a user activates a particular induction cooking coil 10-25 or selects a required power level.
  • the controller 70 may energise the light sources 60 to emit a pulse of light or a sequence of light pulses or to emit light for a period of continuous illumination until a cooking vessel is detected and its approximate position on the cooking surface 30 is determined.
  • controller 70 and the connected components 50, 75-90 as shown in Figure 4 are represented as a schematic block diagram for the purposes of explaining the functionality of the controller 70 and the connected components only.
  • the configuration and implementation of the controller 70 and of the connected components 50, 75-90 may comprise any one of a number of variants as would be apparent to a person of ordinary skill in the relevant art according to the principles described herein.
  • the controller 70 may in practice be provided by a single chip or integrated circuit or plural chips or integrated circuits, optionally provided as a chipset, an application-specific integrated circuit (ASIC), field-programmable gate array (FPGA), digital signal processor (DSP), graphics processing units (GPUs), etc.
  • the chip or chips may comprise circuitry (as well as possibly firmware) for embodying at least one or more of a data processor or processors, a digital signal processor or processors, baseband circuitry and radio frequency circuitry, which are configurable so as to operate in accordance with the exemplary embodiments.
  • the exemplary embodiments may be implemented at least in part by computer software stored in (non-transitory) memory and executable by the processor, or by hardware, or by a combination of tangibly stored software and hardware (and tangibly stored firmware).
  • Data storage associated with the controller 70 may be provided by a single device or by plural devices. Suitable devices include for example a hard disk and non-volatile semiconductor memory.
  • the invention also extends to computer programs, particularly computer programs on or in a carrier, adapted for putting the invention into practice.
  • the program may be in the form of non-transitory source code, object code, a code intermediate source and object code such as in partially compiled form, or in any other non-transitory form suitable for use in the implementation of processes according to the invention.
  • the carrier may be any entity or device capable of carrying the program.
  • the carrier may comprise a storage medium, such as a solid-state drive (SSD) or other semiconductor-based RAM; a ROM, for example a CD ROM or a semiconductor ROM; a magnetic recording medium; optical memory devices in general; etc.
  • SSD solid-state drive
  • ROM read-only memory
  • magnetic recording medium such as a CD ROM or a semiconductor ROM
  • optical memory devices in general

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Induction Heating Cooking Devices (AREA)
EP17203147.8A 2017-11-22 2017-11-22 Induktionsherd, verfahren zum betrieb eines induktionsherdes und steuergerät für einen induktionsherd Active EP3490338B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP17203147.8A EP3490338B1 (de) 2017-11-22 2017-11-22 Induktionsherd, verfahren zum betrieb eines induktionsherdes und steuergerät für einen induktionsherd
TR2017/19171A TR201719171A2 (tr) 2017-11-22 2017-11-29 İndüksi̇yonlu pi̇şi̇ri̇ci̇, bi̇r i̇ndüksi̇yonlu pi̇şi̇ri̇ci̇yi̇ çaliştirmak i̇çi̇n yöntem ve bi̇r i̇ndüksi̇yonlu pi̇şi̇ri̇ci̇ i̇çi̇n kontrolör

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17203147.8A EP3490338B1 (de) 2017-11-22 2017-11-22 Induktionsherd, verfahren zum betrieb eines induktionsherdes und steuergerät für einen induktionsherd

Publications (2)

Publication Number Publication Date
EP3490338A1 true EP3490338A1 (de) 2019-05-29
EP3490338B1 EP3490338B1 (de) 2022-07-06

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EP17203147.8A Active EP3490338B1 (de) 2017-11-22 2017-11-22 Induktionsherd, verfahren zum betrieb eines induktionsherdes und steuergerät für einen induktionsherd

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EP (1) EP3490338B1 (de)
TR (1) TR201719171A2 (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008101766A1 (de) * 2007-02-21 2008-08-28 BSH Bosch und Siemens Hausgeräte GmbH Kochfeld mit einem bewegbaren heizelement
JP2009011401A (ja) * 2007-06-30 2009-01-22 Cleanup Corp システムキッチン
EP2312908A1 (de) * 2009-10-13 2011-04-20 BSH Bosch und Siemens Hausgeräte GmbH Kochfeld mit Sensoren
CN104540260A (zh) 2014-12-17 2015-04-22 无锡博达电气有限公司 电磁炉用可调加热线盘
DE102015203316A1 (de) * 2015-02-24 2016-08-25 E.G.O. Elektro-Gerätebau GmbH Kochfeld und Verfahren zur Positionierung einer Heizeinrichtung an einem Kochfeld

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008101766A1 (de) * 2007-02-21 2008-08-28 BSH Bosch und Siemens Hausgeräte GmbH Kochfeld mit einem bewegbaren heizelement
JP2009011401A (ja) * 2007-06-30 2009-01-22 Cleanup Corp システムキッチン
EP2312908A1 (de) * 2009-10-13 2011-04-20 BSH Bosch und Siemens Hausgeräte GmbH Kochfeld mit Sensoren
CN104540260A (zh) 2014-12-17 2015-04-22 无锡博达电气有限公司 电磁炉用可调加热线盘
DE102015203316A1 (de) * 2015-02-24 2016-08-25 E.G.O. Elektro-Gerätebau GmbH Kochfeld und Verfahren zur Positionierung einer Heizeinrichtung an einem Kochfeld

Also Published As

Publication number Publication date
EP3490338B1 (de) 2022-07-06
TR201719171A2 (tr) 2019-06-21

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