EP3836752A1 - Kochgeschirrplatzierung durch heizungsregelkreis in einem induktionskochsystem - Google Patents

Kochgeschirrplatzierung durch heizungsregelkreis in einem induktionskochsystem Download PDF

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Publication number
EP3836752A1
EP3836752A1 EP19215917.6A EP19215917A EP3836752A1 EP 3836752 A1 EP3836752 A1 EP 3836752A1 EP 19215917 A EP19215917 A EP 19215917A EP 3836752 A1 EP3836752 A1 EP 3836752A1
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EP
European Patent Office
Prior art keywords
cookware
heating
cooktop
placement
induction
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
EP19215917.6A
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English (en)
French (fr)
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EP3836752C0 (de
EP3836752B1 (de
Inventor
Peter Favrholdt
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Ztove Aps
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Ztove Aps
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Priority to EP19215917.6A priority Critical patent/EP3836752B1/de
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Application granted granted Critical
Publication of EP3836752C0 publication Critical patent/EP3836752C0/de
Publication of EP3836752B1 publication Critical patent/EP3836752B1/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
    • H05B2213/06—Cook-top or cookware capable of communicating with each other

Definitions

  • the present invention relates to cooking by an induction cooktop with improved control, temperature regulation, and safety.
  • the invention is directed to cookware having an integrated thermal sensor and another sensor or sensors (e.g., accelerometer, microphone, wire, wire loop or any other) and a method for detection and identification of cookware placement on the cooktop surface, heating zones and within the automated cooking temperature control loop.
  • another sensor or sensors e.g., accelerometer, microphone, wire, wire loop or any other
  • Smart cooking employs systems, methods, and devices for cooking automation, digital regulation, and control by smartphones/apps, and cookware with different sensors, safety means, and other advanced features.
  • the temperature control is achieved by employing a temperature sensor inside the cookware, e. g., in the bottom plain of the pan or pot.
  • the cookware control electronics read an instant temperature value from the sensor and send it to the induction cooktop, or an external smart device and application (e.g., a smartphone) controlling operation of the cooktop. Therefore, the induction cooktop is controlled by an algorithm determining how much power to supply to the heating coil to achieve the desired temperature in the cookware.
  • Induction cooktops usually have several heating zones and control with manual setting of heating levels in the zones. Using more than one cookware item and several heating zones or even cooktops (e.g., in shared kitchens) simultaneously, the complexity may exceed convenience and reduce the efficiency and safety of smart cooking.
  • Cida detecting device of cookware motion information during cooking which matches with cookware in use and comprises a sensor system and a processing module.
  • the sensor system acquires the motion information with the cookware and outputs the information to the processing module for processing to obtain motion change information of the cookware.
  • the adopted detecting device is used as a cookware motion information measuring medium, measures motion types of the cookware, and corresponding motion starting time and stop time of the motion types, then uses the processing module for processing measured information, and accordingly obtains cookware position change information.
  • FIG. 11-13 shows accelerometer and gyroscope signals during flipping, stirring, and whisking movements of the cooking utensil. These movement indications may be useful to identify what actions the user/cook is doing with the utensil; however, these movements and indications are not sufficient to detect cookware placement on the heating areas of the cooktop.
  • the additional variables/parameters are defined and employed for identification and detection of cookware placement on the cooktop.
  • the list of the variables comprises at least these variables:
  • Heating Temperature rate of change at the beginning of the heating (at high power On or Off) there is observed a change of rate (the 2'nd order derivative) of the temperature. This happens with a bit longer delay (because the temperature measurement is rather slow, i. e., 5-10 seconds). But this correlation adds to the probability of the cookware being situated in this zone.
  • the listed variables and their control functions are implemented in the method and the respective algorithm of cookware placement, producing a reliable detection of the various situations in the kitchen and the cookware placement on the cooktop surface and the heating induction zones.
  • the above principles of placement detection can also be used on a cooktop without the "Pot detect” signal where the heating coil is active always after Power-On in that heating area.
  • Some induction cooktops provide the "Pot not detected” signal only when that particular heating zone is turned on. The activated heating zone will not provide heating power unless there are cookware present and the signal "pot is not detected” is received after a second or so. But the speed of detection and the robustness of how easily the detection algorithm can fail is less that means the "Safe Reduce” function needs to be activated more often that leads to the control algorithm initiating a longer detection cycle "all heating zones off - and detect one by one".
  • the placement method requires physical modifications of cookware and respectively developed software in the digital control devices and modules of the cooking system (digital control module of the cooktop, digital control module of the cookware, and application software in the external device/app).
  • One embodiment of the cookware comprises a separate coil, especially for measuring the magnetic field strength from the cooktop induction coil.
  • Another embodiment of the cookware comprises the energy harvesting coil 13 that is used for energy harvesting from the cooktop induction coil 5 but can also be exploited for measuring the magnetic field strength from the induction coil ( FIG.2 ).
  • One more embodiment of the cookware 2 has any integrated sensor and the associated wire or wires in the bottom plain of the cookware 2.
  • One more embodiment takes into account that during the cooking process, the control loop repeatedly changes the power level according to the measured temperature in the pot 2 and the temperature setpoint. Even when cookware is steady on the cooktop, the control loop is maintaining the set temperature; thus the power varies ("oscillates") in a wide range. The history of the past power levels from all active coils is then correlated with the history of previously detected field levels in the cookware items. The result of such calculation is probabilities identifying which cookware item is positioned on each coil/heating area.
  • the "modulation" of power level done by the control loop can be seen as a random modulation; however, it is known by the digital control module in the cooktop. Also, another modulation type can be added to the output of the User Interface panel, e.g., a sine wave modulation or another pseudo-random modulation that can easily be detected by sensors and digital processing algorithms. Any modulation technique could be used.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Cookers (AREA)
  • Induction Heating Cooking Devices (AREA)
EP19215917.6A 2019-12-13 2019-12-13 Kochgeschirrplatzierung durch heizungsregelkreis in einem induktionskochsystem Active EP3836752B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19215917.6A EP3836752B1 (de) 2019-12-13 2019-12-13 Kochgeschirrplatzierung durch heizungsregelkreis in einem induktionskochsystem

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19215917.6A EP3836752B1 (de) 2019-12-13 2019-12-13 Kochgeschirrplatzierung durch heizungsregelkreis in einem induktionskochsystem

Publications (3)

Publication Number Publication Date
EP3836752A1 true EP3836752A1 (de) 2021-06-16
EP3836752C0 EP3836752C0 (de) 2023-06-07
EP3836752B1 EP3836752B1 (de) 2023-06-07

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EP19215917.6A Active EP3836752B1 (de) 2019-12-13 2019-12-13 Kochgeschirrplatzierung durch heizungsregelkreis in einem induktionskochsystem

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023036612A1 (de) * 2021-09-08 2023-03-16 BSH Hausgeräte GmbH Gargeschirrsensorvorrichtung
CN115988692A (zh) * 2022-12-02 2023-04-18 中山安亚思电子科技有限公司 电磁炉智能厨具控制方法和系统
EP4324362A1 (de) * 2022-08-16 2024-02-21 Miele & Cie. KG Funktionsgargeschirr und verfahren zum betreiben
WO2024046640A1 (de) * 2022-08-30 2024-03-07 BSH Hausgeräte GmbH Induktionsenergieübertragungssystem
WO2024094267A1 (en) * 2022-11-04 2024-05-10 Ztove Aps Handover of cookware between cooking zones
WO2024094265A1 (en) * 2022-11-04 2024-05-10 Ztove Aps Induction cookware for providing power instructions to an induction hob

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201710159U (zh) 2009-07-09 2011-01-19 深圳市爱可机器人技术有限公司 烹饪过程中锅具运动信息检测装置
US20140057214A1 (en) * 2012-08-22 2014-02-27 Whirlpool Corporation Boil and boil-dry detection methods for cooking appliances using vibration sensors
EP2999301A1 (de) * 2014-09-18 2016-03-23 Electrolux Appliances Aktiebolag Induktionskochfeld mit Siededetektion und Induktionsenergiesteuerung, Verfahren zum Erwärmen von Speisen mit einem Induktionskochfeld und Computerprogrammprodukt
EP3001771A1 (de) * 2014-09-29 2016-03-30 E.G.O. ELEKTRO-GERÄTEBAU GmbH Verfahren zur Detektion der Identität eines Topfes auf einem Kochpunkt eines Kochfelds und System eines Kochfelds mit einem Topf
EP3364717A1 (de) * 2017-02-20 2018-08-22 Samsung Electronics Co., Ltd. Kochvorrichtung und steuerungsverfahren dafür
US20190125120A1 (en) 2016-02-18 2019-05-02 Meyer Intellectual Properties Limited Cooking system for tracking a cooking device
US10448776B2 (en) 2015-11-30 2019-10-22 Whirlpool Corporation Cooking system

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201710159U (zh) 2009-07-09 2011-01-19 深圳市爱可机器人技术有限公司 烹饪过程中锅具运动信息检测装置
US20140057214A1 (en) * 2012-08-22 2014-02-27 Whirlpool Corporation Boil and boil-dry detection methods for cooking appliances using vibration sensors
US9354207B2 (en) 2012-08-22 2016-05-31 Whirlpool Corporation Boil and boil-dry detection methods for cooking appliances using vibration sensors
EP2999301A1 (de) * 2014-09-18 2016-03-23 Electrolux Appliances Aktiebolag Induktionskochfeld mit Siededetektion und Induktionsenergiesteuerung, Verfahren zum Erwärmen von Speisen mit einem Induktionskochfeld und Computerprogrammprodukt
EP3001771A1 (de) * 2014-09-29 2016-03-30 E.G.O. ELEKTRO-GERÄTEBAU GmbH Verfahren zur Detektion der Identität eines Topfes auf einem Kochpunkt eines Kochfelds und System eines Kochfelds mit einem Topf
US10448776B2 (en) 2015-11-30 2019-10-22 Whirlpool Corporation Cooking system
US20190125120A1 (en) 2016-02-18 2019-05-02 Meyer Intellectual Properties Limited Cooking system for tracking a cooking device
EP3364717A1 (de) * 2017-02-20 2018-08-22 Samsung Electronics Co., Ltd. Kochvorrichtung und steuerungsverfahren dafür

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023036612A1 (de) * 2021-09-08 2023-03-16 BSH Hausgeräte GmbH Gargeschirrsensorvorrichtung
EP4324362A1 (de) * 2022-08-16 2024-02-21 Miele & Cie. KG Funktionsgargeschirr und verfahren zum betreiben
WO2024046640A1 (de) * 2022-08-30 2024-03-07 BSH Hausgeräte GmbH Induktionsenergieübertragungssystem
WO2024094267A1 (en) * 2022-11-04 2024-05-10 Ztove Aps Handover of cookware between cooking zones
WO2024094265A1 (en) * 2022-11-04 2024-05-10 Ztove Aps Induction cookware for providing power instructions to an induction hob
CN115988692A (zh) * 2022-12-02 2023-04-18 中山安亚思电子科技有限公司 电磁炉智能厨具控制方法和系统
CN115988692B (zh) * 2022-12-02 2023-08-22 中山安亚思电子科技有限公司 电磁炉智能厨具控制方法和系统

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Publication number Publication date
EP3836752C0 (de) 2023-06-07
EP3836752B1 (de) 2023-06-07

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