WO2022048837A1 - Appareil de cuisson à induction et procédé de mesure de la température sur une plaque de cuisson à induction - Google Patents

Appareil de cuisson à induction et procédé de mesure de la température sur une plaque de cuisson à induction Download PDF

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Publication number
WO2022048837A1
WO2022048837A1 PCT/EP2021/071532 EP2021071532W WO2022048837A1 WO 2022048837 A1 WO2022048837 A1 WO 2022048837A1 EP 2021071532 W EP2021071532 W EP 2021071532W WO 2022048837 A1 WO2022048837 A1 WO 2022048837A1
Authority
WO
WIPO (PCT)
Prior art keywords
induction hob
induction
sensor unit
magnetic field
magnetic sensor
Prior art date
Application number
PCT/EP2021/071532
Other languages
German (de)
English (en)
Inventor
Tomas Cabeza Gozalo
Carlos Franco Gutierrez
Javier Lasobras Bernad
Sergio Llorente Gil
Emilio PLUMED VELILLA
Julio Rivera Peman
Original Assignee
BSH Hausgeräte GmbH
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.)
Filing date
Publication date
Application filed by BSH Hausgeräte GmbH filed Critical BSH Hausgeräte GmbH
Priority to EP21752566.6A priority Critical patent/EP4209115A1/fr
Publication of WO2022048837A1 publication Critical patent/WO2022048837A1/fr

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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
    • 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
    • H05B2213/07—Heating plates with temperature control means

Definitions

  • the invention relates to an induction hob device according to the preamble of claim 1 and a method for measuring the temperature in an induction hob according to the preamble of claim 14.
  • the object of the invention consists in particular, but not limited thereto, in providing a generic device with improved properties with regard to temperature measurement.
  • the object is achieved according to the invention by the features of claims 1 and 14, while advantageous configurations and developments of the invention can be found in the dependent claims.
  • the invention is based on an induction hob device for an induction hob, in particular with a cooking utensil and with a magnetic sensor unit for measuring at least one magnetic field component of a magnetic field which is generated in particular by a heating unit of the induction hob.
  • the magnetic sensor unit is provided to measure at least one magnetic field component parallel to an induction heating surface of a cooking utensil, in particular parallel to a main extension plane of the induction heating surface, when the induction hob is in an operating state.
  • a configuration of this type makes it possible to increase the accuracy of a temperature measurement in a simple manner.
  • the determined horizontal component of the magnetic field can advantageously be used to determine a power distribution and temperature development along a heated surface, in particular a cooking utensil base.
  • An average temperature of the heated surface can be determined particularly advantageously by means of a single temperature sensor.
  • additional, spatially spaced temperature sensors for determining the average temperature can be dispensed with.
  • the induction hob device could, for example, have at least a part, in particular a subassembly, of an induction hob, in which case, in particular, accessory units for the induction hob can also be included, such as a cooking utensil and/or a base unit for placement between a cooking utensil base of a cooking utensil and a cooking zone of the induction hob .
  • the induction hob device can also include the entire induction hob.
  • the induction hob device could have at least a part, in particular a subassembly, of a cooking utensil, for example a pot or a pan.
  • the induction hob device advantageously has a temperature sensor, for example an NTC temperature sensor.
  • the temperature sensor is arranged in the vicinity of the magnetic sensor unit.
  • the induction hob device preferably has at least one energy source for supplying the temperature sensor and/or the magnetic sensor unit with energy, for example an accumulator or a battery.
  • the induction hob device is particularly advantageously provided for determining an average temperature of the induction heating surface on the basis of the measured magnetic field component and a temperature measurement by the temperature sensor.
  • the induction hob device is preferably provided to determine a distribution of the magnetic field component, in particular a square of the magnetic field component, over the induction heating surface using the measured magnetic field component and a numerical method, for example a finite element method.
  • the induction hob device has a control unit which is provided for measuring data from the magnetic sensor unit and the temperature sensors to determine the average temperature.
  • the induction hob device has a communication unit, which is provided to transmit measurement data from the magnetic sensor unit and/or the temperature sensor to a further unit for processing and/or output to a user.
  • the additional unit could, for example, be part of the induction hob or part of an external unit, in particular a smartphone and/or computer.
  • the communication unit could have a transmitter and/or receiver, in particular an RFID chip and/or radio chip and/or radio chip and/or IR chip and/or Bluetooth chip.
  • the heating unit is preferably designed as a heating inductor.
  • the heating unit could have a plurality of heating inductors.
  • the heating inductor could comprise a wound induction coil or a printed induction coil.
  • the heating unit is assigned to a cooking zone of the induction hob for heating cookware placed on the cooking zone in the operating state.
  • the magnetic sensor unit can have any type of sensor known to those skilled in the art for measuring a magnetic flux.
  • the magnetic sensor unit could have at least one Hall sensor and/or at least one Förster probe and/or at least one optically pumped magnetometer and/or at least one SQUID and/or at least one BEC magnetometer and/or at least one proton magnetometer and/or at least one Have Kerr magnetometer and/or at least one Faraday magnetometer.
  • the magnetic sensor unit could have at least one magnetic field sensor based on common magnetic field sensors used, for example, in mobile devices.
  • the magnetic sensor unit preferably has at least one sensor element which has a coil, particularly preferably a helically wound coil.
  • the sensor element is rotatable relative to a remaining magnetic sensor unit; the sensor element is advantageously immovable relative to a remaining magnetic sensor unit.
  • the sensor element is preferably provided to measure a magnetic field component in the operating state, which runs along a core direction of the coil.
  • a “core direction” of a coil should be understood to mean a direction along which an imaginary iron core could be inserted into a central area around which windings of the coil run. It would be conceivable that the core direction is oriented parallel to a main plane of extension of the sensor element, preferably the core direction is oriented perpendicular to the main plane of extension of the sensor element.
  • the magnetic field has three magnetic field components, which are preferably embodied as an X component, a Y component and a Z component.
  • the magnetic field components are in the form of coordinates of a Cartesian coordinate system which together define a vector which represents a direction of the magnetic field lines of the magnetic field at a predefined point.
  • the horizontal component is designed as a magnetic field component running in a horizontal plane. In the operating state of the induction hob, the horizontal plane is advantageously aligned parallel to a main extension plane of the heating unit of the induction hob and particularly advantageously parallel to a main extension plane of the induction heating surface.
  • a “main extension plane” of a structural unit is to be understood as a plane which is parallel to a largest side surface of an imaginary cuboid which just completely encloses the structural unit and in particular runs through the center point of the cuboid.
  • the X component and the Y component of the magnetic field are preferably designed as horizontal components and the Z component as a vertical component.
  • the vertical component is in the form of a magnetic field component running perpendicular to the horizontal plane.
  • the induction heating surface is preferably designed as a cooking utensil base of the cooking utensil; alternatively, the induction heating surface could be embodied as a side wall, an upper wall or a cooking utensil lid.
  • the induction heating surface is specially designed for heating by the heating unit; the induction heating surface preferably consists of an inductively heatable material such as cast iron.
  • the induction heating surface is preferably at least essentially flat, in particular the induction heating surface can be uneven in partial areas, for example edge areas.
  • Provided is intended to mean specifically programmed, designed and/or equipped. Including that an object is intended for a specific function be understood that the object fulfills and/or executes this specific function in at least one application and/or operating state.
  • the magnetic field component is advantageously designed as a horizontal component of the magnetic field.
  • the magnetic field component is particularly advantageously designed as the X component of the magnetic field or the Y component of the magnetic field.
  • the magnetic field component is preferably aligned parallel to a main extension plane of the induction heating surface. In this way, in particular, the accuracy of the temperature determination can be further increased. It would be conceivable for the induction heating surface to be in the form of a side wall and the magnetic field component to be in the form of a vertical component of the magnetic field.
  • the magnetic sensor unit is provided to measure a first magnetic field component, in particular the X component of the magnetic field, and a second magnetic field component, in particular the Y component of the magnetic field, aligned perpendicularly to the first magnetic field component.
  • the induction hob device is advantageously provided for determining a distribution of a sum of the squares of the first magnetic field component and the second magnetic field component along the induction heating surface using the numerical method. In this way, in particular, the accuracy of a temperature determination can be further increased.
  • the relationship between the distribution of the sum of the squares of the first magnetic field component and the second magnetic field component along the induction heating surface and the power distribution along the induction heating surface can advantageously be used to achieve a sufficiently precise determination of a temperature distribution along the induction heating surface.
  • the sum of the squares of the first magnetic field component and the second magnetic field component is proportional to the power distribution within the induction heating surface, in particular within the cooking utensil base, with a proportionality coefficient of properties of the cooking utensil and the heating unit, such as conductivity and permeability of the induction heating surface, in particular the cooking utensil base, and a frequency of the magnetic field, which are preferably known, the induction hob device being intended to use the characteristics to determine the average temperature.
  • the magnetic sensor unit has a first sensor element for measuring the first magnetic field component and a second sensor element for measuring the second magnetic field component.
  • the magnetic sensor unit can have any number of further first sensor elements and further second sensor elements.
  • the sensor elements are advantageously designed separately from one another.
  • the sensor elements are particularly advantageously configured identically to one another; alternatively, the sensor elements could be configured differently from one another.
  • the sensor elements are advantageously arranged in close proximity to one another, since too great a distance between the sensor elements can lead to errors in the power distribution determined.
  • the first sensor element has a first coil and the second sensor element has a second coil, core directions of the coils particularly preferably spanning an angle of essentially 90° in the horizontal plane.
  • the fact that the angle is “substantially 90°” should be understood to mean that the angle deviates from 90° by at most 15°, advantageously at most 10° and particularly advantageously by at most 5°.
  • the sensor elements are preferably arranged rotated by 90° with respect to one another. It would also be conceivable that the core directions of the coils in the horizontal plane could span any other angle other than 0°.
  • the sensor elements can be arranged in one plane aligned parallel to the horizontal plane or in two different planes aligned parallel to the horizontal plane.
  • the magnetic sensor unit can be constructed by means of a large number of different arrangements of two identical components relative to one another, in particular arrangements that can be adapted to a particular application.
  • a simple determination of the first magnetic field component and the second magnetic field component can advantageously be achieved by rotating the sensor elements by 90° relative to one another.
  • the magnetic sensor unit prefferably has a third sensor element, with the third sensor element being provided for measuring a third magnetic field component, in particular the Z component of the magnetic field.
  • the third sensor element is designed differently from the first and second sensor element; alternatively, the third sensor element could be designed differently from the first and second sensor element be identical in design.
  • the third sensor element preferably has a third coil, the core direction of which is particularly preferably aligned essentially perpendicularly to the horizontal plane.
  • the fact that the core direction of the third coil is “substantially perpendicular” to the horizontal plane should be understood to mean that the core direction deviates from an ideal perpendicular with respect to the horizontal plane by at most 15°, advantageously at most 10° and particularly advantageously at most 5°. In this way, in addition to providing a precise temperature measurement, incorrect placement of cooking utensils can be avoided.
  • the induction hob device has the induction hob, which has at least part of the magnetic sensor unit, for example one of the sensor elements, and preferably the entire magnetic sensor unit.
  • the magnetic sensor unit could be arranged in the operating state in the vicinity of the heating unit; the magnetic sensor unit is preferably arranged on an underside of a hob plate of the induction hob and/or on an underside of a worktop on which the induction hob is mounted.
  • the magnetic sensor unit preferably has a large number of sensor elements which are particularly preferably arranged in the form of a sensor matrix.
  • the magnetic sensor unit can extend over an entire worktop and/or an entire hob plate.
  • the magnetic sensor unit is advantageously designed as part of a plate-shaped element, in particular a coating.
  • a “plate-shaped element” should be understood to mean an element that has a thickness that corresponds to a maximum of 50%, in particular a maximum of 20%, advantageously a maximum of 10%, preferably a maximum of 5%, a length and/or a width of the element.
  • the element preferably has at least one, preferably at least two, in particular opposite sides, which have a flat, in particular smooth, surface. In this way, the induction hob device can be used easily.
  • the magnetic sensor device can be used particularly advantageously for measuring horizontal components of magnetic fields of several and in particular all heating units of the induction hob.
  • the induction hob device can also be used to detect cooking utensils that have been placed by changing the magnetic field be detected by setting up and/or removing the cooking utensil. It would be conceivable that all heating units of the induction hob are provided to generate a preferably weak, additional magnetic field in a detection phase, which takes place in particular outside of the operating state, which is provided exclusively for detecting cooking utensils that have been set up.
  • the induction hob device have a base unit, which is intended to be placed between the induction heating surface designed as the cooking utensil base of the cooking utensil and a cooking zone of the induction hob and which has at least part of the magnetic sensor unit, for example one of the sensor elements, and preferably the entire magnetic sensor unit.
  • a “underlay unit” should be understood to mean a unit which is intended for placing, advantageously for placing, on a worktop and/or hob plate and for setting up at least one cooking utensil and which, in particular in the operating state, is a base for the heated cooking utensil at least partially trained.
  • the base unit is preferably designed in the form of a plate.
  • the base unit is designed to be brittle.
  • the base unit is advantageously designed to be flexible.
  • the fact that a unit is “flexible” is to be understood in particular to mean that the unit can be bent, in particular folded and/or bent, in a non-destructive manner.
  • the magnetic sensor unit can be arranged on an underside and/or an upper side or completely in an interior area of the base unit.
  • a permeability of the base unit is preferably low enough to prevent magnetic saturation effects from occurring in the operating state, since the saturation effects can lead to an error in the measurement of the magnetic field components. In this way, in particular, flexible use of the induction hob device can be achieved.
  • the induction hob device can be used optionally with different cooking utensils and/or different heating units.
  • This configuration of the induction hob device is particularly advantageous for applications with induction hobs that are free of hob plates and are arranged completely below a worktop.
  • the induction hob device has the cooking utensil, which has the induction heating surface, which at least part of the magnetic sensor unit, for example one of the sensor elements, and preferably the entire Has magnetic sensor unit.
  • the induction hob, the base unit and the cooking utensil each have part of the magnetic sensor unit, preferably the induction hob or the base unit or the cooking utensil has the entire magnetic sensor unit.
  • the magnetic sensor unit to be embodied as part of an adhesive unit, for example a sticker, which is intended for detachable or non-detachable attachment to a remaining cooking utensil bottom or a remaining side wall.
  • the magnetic sensor unit is preferably arranged in an interior area of the base of the cooking utensil.
  • a compact and easy-to-use configuration of the induction hob device can be achieved.
  • additional actions by a user to use the induction hob device with the cooking utensil can be dispensed with.
  • the induction hob device can be used particularly advantageously with any heating units without having to extend over several heating units. This configuration of the induction hob device is particularly advantageous for applications with classic induction hobs which have hob plates.
  • a vertical distance between the magnetic sensor unit and the induction heating surface, in particular the base of the cookware, at least in the operating state is at most 50 mm, advantageously at most 20 mm, particularly advantageously at most 10 mm and preferably at most 4 mm.
  • a “vertical distance” is to be understood in this context as a length of a connecting line which runs perpendicularly to the cooking utensil base and connects an underside of the cooking utensil base to the magnetic sensor unit when the cooking utensil is in an upright position. In this way, in particular, the accuracy of the temperature measurement can be increased. Falsifications of the measurement of the horizontal component due to an excessive distance from the bottom of the cooking utensil can advantageously be avoided.
  • a radial distance between the magnetic sensor unit and an edge of the cooking utensil base is at least 4 mm and preferably at least 5 mm, at least in the operating state.
  • a "radial distance" is a length of a connecting line which, when viewed, connects the edge and the magnetic sensor unit and in the direction of a center point of the induction heating surface, in particular the bottom of the cookware, is aligned to be understood. In this way, in particular, the accuracy of the temperature measurement can be further increased. Falsifications of the measurement of the magnetic field components due to magnetic field distortions at the edge of the induction heating surface, in particular the bottom of the cooking utensil, can advantageously be avoided.
  • the magnetic sensor unit it would be conceivable for the magnetic sensor unit to have a housing unit in which all the sensor elements are arranged.
  • the induction hob device have a circuit board on and/or in which the magnetic sensor unit is arranged.
  • the sensor elements could each be mounted on the printed circuit board, preferably soldered and/or printed onto the printed circuit board.
  • the sensor elements are designed as SMD sensors.
  • a permeability of the printed circuit board is preferably low enough to prevent magnetic saturation effects from occurring in the operating state, since the saturation effects can lead to an error in the measurement of the magnetic field components.
  • the sensor elements can each be arranged on an upper side or an underside of the printed circuit board.
  • the first sensor element and the second sensor element could be arranged adjacent to one another on the upper side or the lower side.
  • the first sensor element and the second sensor element could be arranged opposite one another on the upper side and the lower side.
  • the printed circuit board it would also be conceivable for the printed circuit board to have a recess which is intended to accommodate at least one of the sensor elements.
  • the printed circuit board is advantageously part of the support unit or part of the induction heating surface, in particular the bottom of the cooking utensil, or part of a coating on the hob plate and/or the worktop.
  • existing electronic components can be used to arrange the magnetic sensor unit.
  • the magnetic sensor unit is advantageously at least partially embedded in the printed circuit board. It would be conceivable for at least one of the sensor elements to be arranged entirely in an interior area of the printed circuit board. Preferably, at least one of the sensor elements ment a circuit board coil.
  • a “printed circuit board coil” should be understood to mean a coil which extends over part of a top or bottom and over part of the interior.
  • the printed circuit board coil preferably has a plurality of vias which are connected to one another at the ends, preferably by conductive paths of the printed circuit board. In this way, a compact configuration of the magnetic sensor unit can be achieved.
  • the induction hob device has a carrier element, in particular a rod-shaped carrier element, with the magnetic sensor unit being wound onto the carrier element.
  • a "rod-shaped" element is to be understood as an element which has a thickness which corresponds to a maximum of 50%, in particular a maximum of 20%, advantageously a maximum of 10%, preferably a maximum of 5%, a length and a width of the element.
  • the carrier element preferably has an oval, in particular circular, or a rectangular, in particular square, cross section. It would be conceivable for the carrier element to be straight; the carrier element is preferably curved.
  • the carrier element advantageously consists of a non-ferromagnetic material, preferably a high-temperature plastic. As a result, production of the magnetic sensor unit can be simplified.
  • the carrier element preferably extends over an angular range of at least 70°, advantageously at least 80° and particularly advantageously at least 90°.
  • a direction that runs perpendicular to the smallest possible cross-sectional area of the carrier element rotates by at least 80° when the cross-sectional area is displaced from one end of the carrier element to another end of the carrier element.
  • the carrier element could be L-shaped or U-shaped.
  • production of the magnetic sensor unit can be further simplified.
  • the first sensor element and the second sensor element can be wound up on two different partial areas of the carrier element that are aligned perpendicularly to one another.
  • the carrier element is preferably shaped in such a way that when viewed perpendicularly to a main extension plane of the carrier element, all turns of the magnetic sensor unit are at the same distance from a center of the carrier element.
  • the carrier element is particularly preferably at least essentially ring-shaped. Including that the carrier element is "at least substantially ring-shaped" is intended in this Context to be understood that the carrier element corresponds to at least 70%, advantageously at least 80% and particularly advantageously at least 90% of a ring.
  • the ring can have a round or angular cross-section and a circular or square course.
  • the carrier element is C-shaped. In this way, a compact construction of the induction hob device can be achieved.
  • the temperature sensor can advantageously be arranged in a receiving area that is essentially enclosed by the carrier unit.
  • the invention is also based on a method for measuring the temperature in an induction hob, in particular with the induction hob device.
  • the induction hob device and the method should not be limited to the application and embodiment described above.
  • the induction hob device and the method for fulfilling a functionality described herein can have a number of individual elements, components and units that differs from the number specified herein.
  • Show it: 1 shows a cross-sectional representation of an induction hob, a cooking utensil and a base unit with an induction hob device from the front,
  • FIG. 3 shows a schematic process diagram of a method for measuring temperature with the induction hob and the induction hob device
  • FIG. 4 shows a sensor element of a further exemplary embodiment of a magnetic field sensor unit in an oblique view
  • FIG. 5 shows a cross-sectional representation of a further exemplary embodiment of an induction hob and a cooking utensil with an induction hob device from the front
  • FIG. 6 shows a printed circuit board and a magnetic sensor unit of the induction hob device from FIG. 5 in an oblique view
  • FIG. 7 shows a carrier element and a further exemplary embodiment of a magnetic sensor unit of the induction hob device from FIG. 5 from above,
  • FIG. 8 shows a cross-sectional representation of a further exemplary embodiment of an induction hob with the induction hob device and a cooking utensil from the front and
  • FIG. 9 shows a printed circuit board and a magnetic sensor unit of the induction hob device from FIG. 8 in an oblique view.
  • FIG. 1 shows an induction hob device 10a.
  • the induction hob device 10a is used with a standard induction hob 12a.
  • the induction hob 12a is in an operating state.
  • the induction hob 12a is arranged below a worktop 32a.
  • a cooking utensil 24a to be heated is set up on the worktop 32a.
  • the cooking utensil 24a is designed as a frying pan.
  • the induction hob device 10a has a base unit 20a.
  • the base unit 20a is arranged between an induction heating surface 22a of the cooking utensil 24a and a cooking zone of the induction hob 12a.
  • the induction heating surface 22a is as formed a cookware base.
  • the induction heating surface 22a could be designed as a side wall, a top wall or a cooking utensil lid.
  • the pad assembly 20a is made of high temperature silicone.
  • the pad unit 20a provides a support surface for the entire induction heating surface 22a.
  • the induction hob device 10a has a magnetic sensor unit 14a, which is shown in more detail in FIG.
  • the magnetic sensor unit 14a is used to measure an X component of a magnetic field generated by a heating unit 34a of the induction hob 12a.
  • the heating unit 34a is designed as a standard heating inductor.
  • the cooking zone is defined as an area above the heating unit 34a.
  • the heating unit 34a could consist of several common heating inductors which together define the cooking zone.
  • the magnetic field is used to heat the set cooking utensil 24a.
  • the magnetic sensor unit 14a is used to measure a Y component of the magnetic field.
  • the Y component is oriented perpendicular to the X component.
  • the X component and the Y component are aligned parallel to a horizontal plane, which corresponds to a main extension plane of the induction heating surface 22a.
  • the induction hob device 10a has a printed circuit board 28a.
  • the magnetic sensor unit 14a is arranged on the circuit board 28a.
  • the circuit board 28a is embedded in the base unit 20a.
  • a thickness of the washer unit 20a is 2 mm.
  • the printed circuit board 28a is arranged in a central area of the base unit 20a.
  • a vertical distance between the magnetic sensor unit 14a and the induction heating surface 22a is less than 1 mm.
  • a diameter of the induction heating surface 22a is 24 cm.
  • a radial distance between the magnetic sensor unit 14a and an edge 26a of the induction heating surface 22a is approximately 8 cm.
  • the magnetic sensor unit 14a has a first sensor element 16a.
  • the first sensor element 16a is used to measure the X component.
  • the first sensor element 16a has a first coil 38a.
  • the first coil 38a is helically wound.
  • the first coil 38a has a first core direction 40a.
  • the first core direction 40a is aligned parallel to a main extension plane of the first sensor element 16a.
  • the magnetic sensor unit 14a has a second sensor element 18a.
  • the second sensor element 18a has a second coil 42a.
  • the second coil 42a has a second core direction 44a.
  • the second sensor element 18a is used to measure the Y component.
  • the second sensor element 18a is identical to the first sensor element 16a.
  • the second sensor element 18a is arranged on the circuit board 28a rotated by 90° relative to the first sensor element 16a.
  • the magnetic sensor unit 14a could have a third sensor element for measuring a Z component of the magnetic field.
  • the sensor elements 16a, 18a are arranged on opposite sides of the circuit board 28a.
  • the sensor elements 16a, 18a could be arranged on the same side of the printed circuit board or in recesses in the printed circuit board 28a.
  • the induction hob device 10a has a temperature sensor (not shown).
  • the temperature sensor is arranged in the vicinity of the sensor elements 16a, 18a.
  • the temperature sensor is designed as a standard NTC temperature sensor.
  • the induction hob device 10a is used to evaluate measurement data from the magnetic sensor unit 14a and the temperature sensor to determine an average temperature of the induction heating surface 22a.
  • FIG. 3 shows a schematic process diagram of a method for measuring the temperature in the induction hob 12a.
  • a laying step 100a the induction hob device 10a is placed on the induction hob 12a.
  • the cooking utensil 24a is installed on the induction hob device 10a.
  • the setting up step 110a follows the hanging up step 100a.
  • a measuring step 120a the induction hob 12a is switched to the operating state.
  • the heating unit 34a generates the magnetic field.
  • the magnetic sensor unit 14a measures the X component and the Y component of the magnetic field.
  • the temperature sensor measures a temperature at a point on the induction heating surface 22a.
  • the induction hob device 10a uses the measurement data from the magnetic sensor unit 14a and the temperature sensor to determine an average temperature of the induction heating surface 22a.
  • the measuring step 120a follows the setting up step 110a.
  • FIGS. 1 to 3 Four further exemplary embodiments of the invention are shown in FIGS. The following descriptions are essentially limited to the differences between the exemplary embodiments, with reference being made to the description of the exemplary embodiment in FIGS. 1 to 3 with regard to components, features and functions that remain the same.
  • the letter a in the reference numbers of the exemplary embodiment in FIGS. 1 to 3 is replaced by the letters ben b to e in the reference numerals of the embodiment of Figures 4 to 9 replaced.
  • components with the same designation in particular with regard to components with the same reference numbers, reference can in principle also be made to the drawings and/or the description of the exemplary embodiment in FIGS.
  • FIG. 4 shows a first sensor element 16b of a further exemplary embodiment of a magnetic sensor unit 14b.
  • the first sensor element 16b has a first coil 38b.
  • the first coil 38b has a first core direction 40b.
  • the first core direction 40b runs perpendicular to a main extension plane of the first sensor element 16b.
  • the first sensor element 16b is arranged on a printed circuit board (not shown) in such a way that the first core direction 40b runs analogously to the first core direction 40a in FIG.
  • FIG. 5 shows a further exemplary embodiment of an induction hob device 10c.
  • the induction hob device 10c is used with an induction hob 12c.
  • the induction hob 12c has a hob plate 36c.
  • the induction hob device 10c has a cooking utensil 24c.
  • the induction hob device 10c has a magnetic sensor unit 14c, which is shown in more detail in FIG.
  • the magnetic sensor unit 14c is arranged in an interior area of an induction heating surface 22c of the cooking utensil 24c.
  • the induction hob device 10c has a printed circuit board 28c.
  • the magnetic sensor unit 14c is partially embedded in the circuit board 28c.
  • the magnetic sensor unit 14c has a first sensor element 16c.
  • the first sensor element 16c has a first coil 38c.
  • the first coil 38c is designed as a circuit board coil.
  • the first coil 38c extends over part of a surface of the circuit board 28c.
  • the first coil 38c extends over part of an interior area of the printed circuit board 28c.
  • the first coil 38c consists of vias 48c and conductive paths 50c.
  • FIG. 7 shows a further exemplary embodiment of an induction hob device 10d.
  • the induction hob device 10d has a carrier element 30d.
  • the carrier element 30d consists of a high-temperature plastic.
  • the induction hob device 10d has a magnetic sensor unit 14d.
  • the magnetic sensor unit 14d is wound onto the carrier element 30d.
  • the magnetic sensor unit 14d has a first sensor element 16d and a second sensor element 18d.
  • the sensor elements 16d, 18d are wound on mutually perpendicularly aligned partial areas of the carrier element 30d.
  • the carrier element 30d extends over an angular range of approximately 360°.
  • the carrier element 30d is essentially ring-shaped.
  • the carrier element 30d is designed as an angular ring open to one side.
  • the induction hob device 10d has a temperature sensor 46d.
  • the carrier element 30d essentially surrounds the temperature sensor 46d.
  • FIG. 8 shows a further exemplary embodiment of an induction hob device 10e.
  • the induction hob device 10e has an induction hob 12e.
  • the induction hob 12e has a magnetic sensor unit 14e, which is shown in more detail in FIG.
  • the induction hob device 10e has a printed circuit board 28e.
  • the printed circuit board 28e extends over an entire hob plate 36e of the induction hob
  • the printed circuit board 28e is printed on an underside of the hob plate 36e.
  • the magnetic sensor unit 14e is arranged on the circuit board 28e.
  • the magnetic sensor unit 14e has a plurality of first sensor elements 16e and second sensor elements 18e.
  • the sensor elements 16e, 18e are arranged in the form of a sensor matrix.
  • the magnetic sensor unit 14e is partially embedded in the circuit board 28e.
  • the first sensor elements 16e are arranged on one side of the circuit board 28e.
  • the second sensor elements 18e are arranged in an interior area of the printed circuit board 28c.

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

Abstract

L'invention concerne un appareil de cuisson à induction (10a-e) destiné à une table de cuisson à induction (12a-e), comprenant une unité de capteur magnétique (14a-e) pour la mesure d'au moins une composante de champ magnétique d'un champ magnétique. Afin d'augmenter la précision d'une mesure de température, selon l'invention, l'unité de capteur magnétique (14a-e) est disposée pour mesurer, dans un état de fonctionnement de la plaque de cuisson à induction (12a-e), au moins une composante de champ magnétique parallèle à une surface de chauffage par induction (22a-b) d'un plat de cuisson (24a-b).
PCT/EP2021/071532 2020-09-02 2021-08-02 Appareil de cuisson à induction et procédé de mesure de la température sur une plaque de cuisson à induction WO2022048837A1 (fr)

Priority Applications (1)

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EP21752566.6A EP4209115A1 (fr) 2020-09-02 2021-08-02 Appareil de cuisson à induction et procédé de mesure de la température sur une plaque de cuisson à induction

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EP20382781.1 2020-09-02
EP20382781 2020-09-02

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WO2022048837A1 true WO2022048837A1 (fr) 2022-03-10

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69424443T2 (de) * 1993-06-04 2001-02-08 Voss Fabrik Atlas Husholdnings Vorrichtung zur steuerung der erwärmung von nahrungsmitteln
KR20150117433A (ko) * 2014-04-10 2015-10-20 삼성전자주식회사 유도 가열 조리기 및 그 제어방법
US20180110364A1 (en) * 2015-09-23 2018-04-26 Lg Electronics Inc. Container support
CN207766586U (zh) * 2017-12-14 2018-08-24 佛山市顺德区美的电热电器制造有限公司 烹饪器具

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69424443T2 (de) * 1993-06-04 2001-02-08 Voss Fabrik Atlas Husholdnings Vorrichtung zur steuerung der erwärmung von nahrungsmitteln
KR20150117433A (ko) * 2014-04-10 2015-10-20 삼성전자주식회사 유도 가열 조리기 및 그 제어방법
US20180110364A1 (en) * 2015-09-23 2018-04-26 Lg Electronics Inc. Container support
CN207766586U (zh) * 2017-12-14 2018-08-24 佛山市顺德区美的电热电器制造有限公司 烹饪器具

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