EP2211591B2 - Verfahren zum Betreiben eines Kochfelds mit einer Mehrzahl von Heizelementen - Google Patents

Verfahren zum Betreiben eines Kochfelds mit einer Mehrzahl von Heizelementen Download PDF

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Publication number
EP2211591B2
EP2211591B2 EP10151139.2A EP10151139A EP2211591B2 EP 2211591 B2 EP2211591 B2 EP 2211591B2 EP 10151139 A EP10151139 A EP 10151139A EP 2211591 B2 EP2211591 B2 EP 2211591B2
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EP
European Patent Office
Prior art keywords
cooking vessel
vessel element
control unit
case
heating zone
Prior art date
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Application number
EP10151139.2A
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German (de)
English (en)
French (fr)
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EP2211591B1 (de
EP2211591A1 (de
Inventor
David Casanova Lacueva
Ignacio Garde Aranda
Javier Herrera Rodriguez
Carlos Vicente Mairal Serrano
Ramon Peinado Adiego
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
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BSH Bosch und Siemens Hausgeraete GmbH
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Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
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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
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/12—Cooking devices
    • 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
    • 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

Definitions

  • the invention relates to a method for operating a hob according to the preamble of claim 1 and a hob with a plurality of heating elements according to the preamble of claim 11.
  • So-called matrix cooktops with a multiplicity of small and identically constructed heating elements are known from the state of the art, which are arranged in a grid.
  • One of the distinguishing features of such cooktops is the ability to form from one or more such heating elements a flexible heating zone adapted to the size, shape and position of a cookware element placed on the cooktop. The user can therefore position the cookware element largely freely, and the assignment of different heating elements, in particular inductors of an induction hob, to the cookware element is automatically such that those heating elements that can heat the cookware element most effectively, this cookware element or on this cookware element be assigned adapted heating zone.
  • the detection of the shape, size and position of the cooking utensil element is usually not continuous, but with a time interval of a few seconds, which in particular energy can be saved in a standby mode. If a user inadvertently shifts or even deliberately displaces a cooking pot during cooking, either a corresponding shift in the heating zone must be made or a suboptimal adjustment of the heating zone to the cookware element must be accepted.
  • the invention is in particular the object of providing a working method for operating a hob with freely definable heating zones, which has an improved ease of use.
  • the invention is particularly based on a method for operating a hob with a plurality of heating elements.
  • the method comprises detecting a cooking utensil element by a detection arrangement, forming a heating zone adapted to the detected cookware element from one or more heating elements and setting at least one operating parameter of a heating zone by means of a user interface.
  • the control unit with the aid of the detection arrangement identifies the process as a whole and as a unit and does not interpret the process of removing the cooking utensil element and the process of setting up the cooking utensil element as two separate processes.
  • the method therefore further comprises associating the operation with one of at least two cases by the control unit.
  • the process is interpreted in a first case as a movement of the same cooking utensil element from the initial position to the end position.
  • the control unit automatically recognizes that it is not about moving the same cooking utensil element, but removing a cooking utensil and setting up a new cookware element.
  • the control unit moves the heating zone from the region of the initial position into the region of the end position.
  • the heating zone new heating elements are assigned and at least a portion of the heating zone originally assigned heating elements is removed or deactivated.
  • the originally set operating parameters for the displaced heating zone are taken over by the control unit. As a result, the ease of use can be significantly improved because a readjustment of the operating parameters can be omitted.
  • the assignment of the process to one of the cases takes place on the basis of at least one parameter which can be set by the user via the user interface.
  • the control unit can determine a parameter for the process, compare this characteristic with the parameter and the assignment or case distinction depending on the Perform the result of this comparison.
  • the control unit may determine suitable parameters, for example, if it determines a spatial distance between the starting position and the end position of the process. This distance can be used when assigning the operation to the different cases. Shifts by comparatively short distances are often unintentional, so that the adoption of the operating parameters of the heating zone corresponds to the user's request.
  • control unit can also determine a time interval between the removal of the cooking utensil element from the initial position and the setting up of the cookware element in the end position and perform the assignment of the process depending on the time interval.
  • a large time interval speaks in favor of the user's desire to interrupt the original cooking process and to start a new cooking process, while moving or changing the cooking utensil element in a short time interval usually reflects the user's desire not to cook as much as possible interrupt.
  • the time in which the converted or displaced cookware element remains unheated can be shortened by the automatic adoption of the operating parameters.
  • the case of a displacement of the same cooking utensil element can be easily distinguished from the setting up of another cooking utensil element by the control unit, when the control unit determines a size and / or shape of the cooking utensil element removed from the initial position with a size and / or shape of the cooking utensil element placed on the end position compares. If the differences in size and shape are within a measurement accuracy of the detection assembly, it is likely to be the same cookware element, while otherwise being a different cookware element, so that adoption of the operating parameters for the new cookware element is unlikely to be desired.
  • Another feature that can be used to identify the cooking utensil element is the material properties of the cookware element. These can be measured by the detection arrangement and used by the control unit to identify the cookware element.
  • the user can select by an input in the user interface, whether the set operating parameters or the set operating parameters for the relocated heating zone to be adopted or not.
  • the intervention of the user in cases of doubt, a misinterpretation of the process, which could upset the user, can be avoided.
  • control unit assign the process to one of at least three cases.
  • a shift of the same cookware element is clearly identified and the set operating parameters are automatically adopted for the displaced heating zone.
  • the assignment or classification of the process is unclear and the operating parameter (s) are only adopted for the relocated heating zone if the user confirms this by a corresponding input. The user may be prompted by a plain text display on the user interface to make such an entry.
  • the user's desire to create a new heating zone is unambiguous, and the operating parameters for the displaced heating zone are set to a default value, such as power level 0.
  • control unit can detect a speed of movement of the cookware element from the initial position to the end position and determine the temperature of the cookware element. Both parameters can be used to classify the process and / or to identify the cookware element.
  • the operating parameters of the heating zone taken over in accordance with the invention can in particular comprise a heating power or power level of the heating zone and timer settings, for example a remaining running time. If more complex operating programs occur on the heating zone, operating programs interrupted by the movement of the cooking utensil element can continue on the displaced heating zone.
  • the cooktop comprises a plurality of heating elements, a detection arrangement, a control unit and a user interface.
  • Fig. 1 shows an induction hob with a plurality of heating elements designed as inductors 10.
  • the inductors 10 are arranged in a uniform grid, identical in construction and can be operated by a control unit 18 substantially independently of each other.
  • the control unit 18 is a universally programmable arithmetic unit that generates control signals for operating one or more power electronics assemblies 28.
  • the power electronics assemblies 28 include a plurality of inverters 40, a filter 42 and a rectifier 44.
  • a switching arrangement 48 connects the inverters 40 to different inductors 10.
  • the inverters 40 generate a high frequency heating current that flows through the inductors 10 and generates a high frequency magnetic field.
  • the magnetic field creates eddy currents in a bottom of a cooking utensil element 12 placed on the hob, which heat the cookware element 12.
  • the heating power generated by the inductors 10 may be adjusted by varying a frequency and / or amplitude of the heating current generated by the inverters 40.
  • the control unit 18 uses the inductors 10 as a detection arrangement 14 for detecting the cookware elements 12 placed on the hob. For this purpose, the control unit 18 measures the influence of the cookware elements 12 on the inductance of the inductors 10 and of the inductors 10 and the bottom of the cookware element 12 existing overall system. Furthermore, the electrical losses in the bottom of the cookware element 12 lead to a frequency-dependent resistance or loss angle in the inductors 10. These loss angles can be used in addition to the detection of the cookware element 12 or for measuring material properties of its ferromagnetic ground.
  • the control unit 18 can in particular determine a degree of overlap between the bottom of the cookware element 12 and each of the inductors 10 and determine the position, size and shape of the bottom of the cookware element 12 from these measured variables. Depending on these data, the control unit 18 forms for each cookware element 12 a heating zone 16 which is adapted in size, shape and position to the size, shape and position of the detected cookware element 12. The control unit 18 combines those inductors 10, which are covered by the bottom of the cooking utensil element 12 for more than a predetermined proportion, to the heating zone 16 which is assigned to the relevant cookware element 12.
  • this comprises a user interface 26, on which the control unit 18 visualizes the heating zones 16 adapted to the detected cookware elements 12.
  • the user may set a power level and other operating parameters, such as a timer run time or a time for automatically turning off the heating zone 16, to each heating zone 16 via the user interface 26.
  • Fig. 2 schematically shows a process in which the cooking utensil element 12 shown as a circle is removed from an initial position 20 and then placed in an end position 22.
  • the detection arrangement 14 detects the position, size and shape of the cookware element 12 in regular cycles, in particular with cycle times of less than one second.
  • the measurement data are stored so that a change in position is detected directly by comparing the earlier measurement data with the current measurement data can be.
  • a timer or a time detection algorithm of the control unit 18 begins to run.
  • FIG. 3 is a flow chart of a case discrimination algorithm for classifying these operations.
  • FIG. If the setting up of the cookware element 12 in the end position 22 is detected within a predetermined time of about 10 seconds, the in Fig. 3 schematically illustrated algorithm which serves to assign this process to one of three cases. This allocation algorithm is implemented in the control unit 18 as software.
  • the control unit 18 determines a distance between the centers of the initial position 20 and the end position 22 and stores this distance as a distance value d.
  • the control unit 18 determines a time difference between the removal of the cooking utensil element 12 from the initial position 20 and the setting up of the cookware element 12 in the end position 22 and stores the thus determined time interval as a value t.
  • the control unit 18 determines a diameter of the cookware element removed from the initial position 20 and the cookware element placed on the end position 22 and forms the difference between these two diameters. This difference is stored as value s.
  • a step 36 three cases are distinguished.
  • a first case both the value d is smaller than a first threshold value d1 and the value t is smaller than a threshold value t1 and the value s is smaller than a threshold value s1.
  • a step 38 the heating zone 16 is moved to the area of the end position 22 and the operating parameters set for the heating zone 16 in their original position are taken over by the control unit 16 for the displaced heating zone 16.
  • the control unit checks in a step 37, whether the second or the third case occurs.
  • the third case which occurs when both the value d is greater than a threshold d2 and the value t is greater than a threshold t2 and the value s is greater than a threshold s2, the probability is very high the cookware element detected in the end position 22 is not around the cookware element 12 remote from the initial position 20 and that the user wishes to start a new cooking process. All operating parameters of the displaced heating zone 16 are then set to zero. In particular, the power level is set to zero and all timer functions are disabled.
  • the threshold values d2, t2 and s2 are each greater than the threshold values d1, t1 and s1.
  • a second case which occurs when neither the first nor the third case occurs, ie in particular when at least one of the values d, t, s lies between the two relevant threshold values d1, d2 or t1, t2 or s1, s2 , on a display of the user interface 26 the user is prompted to decide whether or not to accept the user setting from the old heating zone 16 to the displaced heating zone 16. If no user input occurs after a predetermined time, the operating parameters of the heating zone 16 are set to zero.
  • the user can change the threshold values d1, d2, s1, s2, t1, t2 via the user interface 26 in order to adapt them to his needs.
  • the user can only change one parameter that describes the sensitivity of the system.
  • the controller 18 may then determine the various thresholds depending on the parameter set by the user.
  • the detection arrangement 14 or the control unit 18 can also detect the temperature of the cookware element 12. If the temperature of the cooking utensil remote from the initial position 20 is very different from the temperature of the cooking utensil erected on the end position 22, then in all likelihood it will not be the same cookware element.
  • the identification of the cookware element 12 can also be improved by measuring the material properties of the cookware element 12.
  • control unit 18 may also determine the speed of a shift operation of the cookware element 12, for example by dividing the value d by the value t. If the detection takes place at a high measuring frequency, of course, further points of a trajectory of the cookware element 12 can be determined, which facilitates the distinction of a displacement of the cookware element from the setting up of another cooking utensil element.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electric Stoves And Ranges (AREA)
EP10151139.2A 2009-01-22 2010-01-20 Verfahren zum Betreiben eines Kochfelds mit einer Mehrzahl von Heizelementen Active EP2211591B2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES200900267A ES2358818B1 (es) 2009-01-22 2009-01-22 Procedimiento para accionar un campo de cocción con una pluralidad de elementos de calentamiento.

Publications (3)

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EP2211591A1 EP2211591A1 (de) 2010-07-28
EP2211591B1 EP2211591B1 (de) 2011-08-10
EP2211591B2 true EP2211591B2 (de) 2014-10-01

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AT (1) ATE520281T1 (es)
ES (2) ES2358818B1 (es)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10605464B2 (en) 2012-10-15 2020-03-31 Whirlpool Corporation Induction cooktop
US10893579B2 (en) 2017-07-18 2021-01-12 Whirlpool Corporation Method for operating an induction cooking hob and cooking hob using such method
US10993292B2 (en) 2017-10-23 2021-04-27 Whirlpool Corporation System and method for tuning an induction circuit
US11140751B2 (en) 2018-04-23 2021-10-05 Whirlpool Corporation System and method for controlling quasi-resonant induction heating devices
US11212880B2 (en) 2012-10-15 2021-12-28 Whirlpool Emea S.P.A. Induction cooking top
EP3612002B1 (de) * 2018-08-14 2022-03-09 E.G.O. Elektro-Gerätebau GmbH Verfahren zur ansteuerung einer heizeinrichtung eines kochfelds und kochfeld

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2966003B1 (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
EP2822355B1 (en) 2013-07-03 2016-12-14 ELECTROLUX PROFESSIONAL S.p.A. Cooking hob and operation method thereof
EP3028537B1 (de) * 2013-07-31 2019-09-11 BSH Hausgeräte GmbH Kochfeldvorrichtung
EP3028536B1 (de) 2013-07-31 2020-04-22 BSH Hausgeräte GmbH Kochfeldvorrichtung
EP2846607B1 (en) 2013-09-05 2016-05-18 Electrolux Appliances Aktiebolag An induction cooking hob including a cooking area with three or more induction coils and a method for controlling a cooking area
ES2535245B1 (es) 2013-11-05 2016-02-16 Bsh Electrodomésticos España, S.A. Dispositivo de campo de cocción por inducción
ES2544515B1 (es) * 2014-02-28 2016-06-09 Bsh Electrodomésticos España, S.A. Campo de cocción con varios elementos de calentamiento.
DE102014111899A1 (de) * 2014-08-20 2016-02-25 Miele & Cie. Kg Kochfeldeinrichtung und Verfahren zum Betreiben
ES2569577B1 (es) 2014-10-23 2017-03-01 BSH Electrodomésticos España S.A. Dispositivo de campo de cocción por inducción con sensor para detectar parámetros de una batería de cocción, sistema de dispositivo y batería, campo de cocción y procedimiento para accionar dicho dispositivo.
CN104797023A (zh) * 2015-04-28 2015-07-22 江苏惠通集团有限责任公司 智能电器系统及其控制装置和配套装置
DE102016217783A1 (de) 2016-09-16 2018-03-22 E.G.O. Elektro-Gerätebau GmbH Verfahren zum Betrieb eines Kochfeldes mit mehreren Heizeinrichtungen
KR20210066227A (ko) * 2019-11-28 2021-06-07 엘지전자 주식회사 사용자의 제스처에 따라 특정 기능을 제공하는 전기 레인지
DE102020103295A1 (de) 2020-02-10 2021-08-12 Miele & Cie. Kg Kochfeldeinheit
BE1028866B1 (de) * 2020-12-09 2022-07-12 Miele & Cie Vorrichtung zum Steuern einer Matrixsegmentanzeige für ein Haushaltsgerät, Haushaltsgerät mit Kochfeld, Matrixsegmentanzeige und Verfahren zum Steuern einer Matrixsegmentanzeige
EP4106490A1 (en) * 2021-06-15 2022-12-21 Aktiebolaget Electrolux Induction cooking appliance
EP4250872A1 (en) * 2022-03-25 2023-09-27 Electrolux Appliances Aktiebolag Induction cooking hob

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US20070164017A1 (en) † 2003-11-27 2007-07-19 Brandt Industries Method for heating a container placed on a cooktop by heating means associated to inductors

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DE1015677B (de) 1956-04-05 1957-09-12 Kurt Weberling Einrichtung zum Aufbringen von Magnettonbaendern auf Filmstreifen
DE10033361A1 (de) * 2000-07-08 2002-01-24 Thomas Wartmann Matrix-Kochfeld

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070164017A1 (en) † 2003-11-27 2007-07-19 Brandt Industries Method for heating a container placed on a cooktop by heating means associated to inductors

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10605464B2 (en) 2012-10-15 2020-03-31 Whirlpool Corporation Induction cooktop
US11212880B2 (en) 2012-10-15 2021-12-28 Whirlpool Emea S.P.A. Induction cooking top
US11655984B2 (en) 2012-10-15 2023-05-23 Whirlpool Corporation Induction cooktop
US10893579B2 (en) 2017-07-18 2021-01-12 Whirlpool Corporation Method for operating an induction cooking hob and cooking hob using such method
US10993292B2 (en) 2017-10-23 2021-04-27 Whirlpool Corporation System and method for tuning an induction circuit
US11140751B2 (en) 2018-04-23 2021-10-05 Whirlpool Corporation System and method for controlling quasi-resonant induction heating devices
EP3612002B1 (de) * 2018-08-14 2022-03-09 E.G.O. Elektro-Gerätebau GmbH Verfahren zur ansteuerung einer heizeinrichtung eines kochfelds und kochfeld

Also Published As

Publication number Publication date
ES2368028T5 (es) 2014-11-19
ES2358818B1 (es) 2012-04-02
ES2368028T3 (es) 2011-11-11
EP2211591B1 (de) 2011-08-10
EP2211591A1 (de) 2010-07-28
ES2358818A1 (es) 2011-05-16
ATE520281T1 (de) 2011-08-15

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