EP3503672A1 - Induktionskochfeld - Google Patents

Induktionskochfeld Download PDF

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Publication number
EP3503672A1
EP3503672A1 EP17208843.7A EP17208843A EP3503672A1 EP 3503672 A1 EP3503672 A1 EP 3503672A1 EP 17208843 A EP17208843 A EP 17208843A EP 3503672 A1 EP3503672 A1 EP 3503672A1
Authority
EP
European Patent Office
Prior art keywords
sensor
cooktop
movable
induction
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.)
Granted
Application number
EP17208843.7A
Other languages
English (en)
French (fr)
Other versions
EP3503672B1 (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
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 EP17208843.7A priority Critical patent/EP3503672B1/de
Priority to TR2017/22204A priority patent/TR201722204A2/tr
Publication of EP3503672A1 publication Critical patent/EP3503672A1/de
Application granted granted Critical
Publication of EP3503672B1 publication Critical patent/EP3503672B1/de
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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
    • H05B6/06—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”.
  • the invention provides an induction cooktop comprising:
  • the senor is a movable sensor.
  • the invention provides an induction cooktop comprising:
  • the sensor is preferably a movable ultrasound sensor. It is further preferred that said movable ultrasound sensor may be mounted on a rail system.
  • the one or more movable induction coils include coils of different sizes. It is further preferred that said cooktop is operable to select a size of coil and move that coil to a selected location based on information from said sensor.
  • a plurality of induction coils may be controlled by a single control or by a single slider.
  • the cooktop of the invention contains only one sensor, being a movable ultrasound sensor.
  • the cooktop 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 based on information from said sensor.
  • the invention provides a method for operating an induction cooktop comprising:
  • the invention provides a method for operating an induction cooktop comprising:
  • said method further comprises operating said cooktop to select a coil and move that coil to selected location based on information from said sensor.
  • Said method 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 one or more movable induction coils, and a sensor.
  • the induction cooktop according to the invention includes one or more induction coils and a movable sensor.
  • the induction cooktop according to the invention includes one 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/or the size of the cooking vessel.
  • the sensor detects at least the location 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 senor may detect 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/or 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 invention further provides a method of operating an induction cooktop, 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)
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 true EP3503672A1 (de) 2019-06-26
EP3503672B1 EP3503672B1 (de) 2022-08-10

Family

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)

Citations (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
US5714739A (en) 1995-01-25 1998-02-03 Meneghetti Ampelio & C. S.N.C. Control device particularly for induction cooking ranges with multiple heating elements
WO2008101766A1 (de) * 2007-02-21 2008-08-28 BSH Bosch und Siemens Hausgeräte GmbH Kochfeld mit einem bewegbaren heizelement
JP2009011400A (ja) * 2007-06-30 2009-01-22 Cleanup Corp システムキッチン
JP2009011401A (ja) * 2007-06-30 2009-01-22 Cleanup Corp システムキッチン
EP2440007A2 (de) * 2010-10-07 2012-04-11 FagorBrandt SAS Steuerverfahren bei Betrieb einer Reihe von Induktoren eines Induktionskochfeldes, und zugehöriges Induktionskochfeld
US8791398B2 (en) 2010-03-03 2014-07-29 Bsh Bosch Und Siemens Hausgeraete Gmbh Hob having at least one cooking zone and method for operating a hob

Patent Citations (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
US5714739A (en) 1995-01-25 1998-02-03 Meneghetti Ampelio & C. S.N.C. Control device particularly for induction cooking ranges with multiple heating elements
WO2008101766A1 (de) * 2007-02-21 2008-08-28 BSH Bosch und Siemens Hausgeräte GmbH Kochfeld mit einem bewegbaren heizelement
JP2009011400A (ja) * 2007-06-30 2009-01-22 Cleanup Corp システムキッチン
JP2009011401A (ja) * 2007-06-30 2009-01-22 Cleanup Corp システムキッチン
US8791398B2 (en) 2010-03-03 2014-07-29 Bsh Bosch Und Siemens Hausgeraete Gmbh Hob having at least one cooking zone and method for operating a hob
EP2440007A2 (de) * 2010-10-07 2012-04-11 FagorBrandt SAS Steuerverfahren bei Betrieb einer Reihe von Induktoren eines Induktionskochfeldes, und zugehöriges Induktionskochfeld

Also Published As

Publication number Publication date
EP3503672B1 (de) 2022-08-10
TR201722204A2 (tr) 2019-07-22

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