EP2600691B1 - Plaque de cuisson - Google Patents

Plaque de cuisson Download PDF

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Publication number
EP2600691B1
EP2600691B1 EP12382420.3A EP12382420A EP2600691B1 EP 2600691 B1 EP2600691 B1 EP 2600691B1 EP 12382420 A EP12382420 A EP 12382420A EP 2600691 B1 EP2600691 B1 EP 2600691B1
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EP
European Patent Office
Prior art keywords
placement
hob
measuring unit
cooking
heating
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.)
Active
Application number
EP12382420.3A
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German (de)
English (en)
Other versions
EP2600691A3 (fr
EP2600691A2 (fr
Inventor
Daniel ANTÓN FALCÓN
Carlos Franco Gutierrez
Ignacio Garde Aranda
Pablo Jesús Hernández Blasco
Paul Muresan
David Paesa García
Daniel PALACIOS TOMÁS
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
Original Assignee
BSH Hausgeraete 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 Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Publication of EP2600691A2 publication Critical patent/EP2600691A2/fr
Publication of EP2600691A3 publication Critical patent/EP2600691A3/fr
Application granted granted Critical
Publication of EP2600691B1 publication Critical patent/EP2600691B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/06—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
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0227—Applications
    • H05B1/0252—Domestic applications
    • H05B1/0258—For cooking
    • H05B1/0261—For cooking of food
    • H05B1/0266—Cooktops
    • 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 cooktop comprises a sensor unit with two acoustic sensors for detecting an installation position of a cooking vessel on one of the four heating zones.
  • the international patent application WO 2006/072388 A1 discloses a hob with a ceramic hob plate, wherein a plurality of individual heating units are provided on the hob, which are uniformly hexagonal and connect to each other. Elongated lighting segments are arranged on their outer contours. When operating this hob with several adjacent heating units as associated heating surface, the entire outer contour of this heating surface or that of the individual heating units Illuminated and thus the user the activated heating units are displayed.
  • a hob is known with a hotplate and at least one cooking zone.
  • a plurality of heating elements is arranged for the at least one cooking zone.
  • Each of the plurality of heating elements is associated with a detection device for pot detection.
  • a control device is provided which is designed to switch on only those heating elements of the plurality of heating elements whose respective detection device has detected a cooking utensil on the cooking plate above this heating element, and the power levels of the heating elements activated in this manner as a function of that detected by the detection devices Position of the cookware to drive.
  • the European patent application EP 2 242 328 A2 discloses a method for detecting cookware elements on a matrix cooktop.
  • the method includes creating a first image of a bottom surface of a cookware element or multiple cookware elements placed on the matrix hob, and classifying a contiguous surface in the image of the bottom surface depending on the shape and / or size the area.
  • a pot separation algorithm is used to distinguish areas created by a single cookware element from areas created by two or more cookware elements.
  • the object of the invention is in particular to optimize a cooking utensil detection.
  • the object is achieved by the features of claim 1 and the method claims 8 and 9, while advantageous embodiments and modifications of the invention can be taken from the dependent claims.
  • the invention relates to a cooktop apparatus with a cooktop panel with an at least substantially free installation position for heating a cooking utensil, with a set-up measuring unit designed differently by a heating unit and with a control unit, which is provided to initiate a set-up position determination upon receipt of a signal by the set-up measuring unit ,
  • a set-up measuring unit designed differently by a heating unit and with a control unit, which is provided to initiate a set-up position determination upon receipt of a signal by the set-up measuring unit
  • a “hob plate” should be understood in particular a plate unit of a hob, which is provided in an operational state for setting up a cooking utensil on a top.
  • the hob plate is at least partially and particularly advantageously completely made of a glass ceramic.
  • an "at least essentially free installation position for heating a cooking utensil” should be understood in this context, in particular a freely selectable at least within predetermined limits position on which the cooking utensils can be placed for heating on the hob plate, with a range within the given limits in particular an area of at least 50%, in particular of at least 60%, preferably of at least 70%, advantageous of at least 80%, and more preferably at least 90%, of a surface area of the entire top surface of the cooktop panel.
  • heating unit is to be understood in particular as a unit which is intended to convert electrical energy into heat.
  • the heating unit comprises a resistance heater and / or a radiant heater and / or preferably an induction heater, which is intended to convert electrical energy into heat indirectly via eddy currents induced in the cooking utensil.
  • a "set-up measuring unit” should be understood to mean a unit which is provided to detect the setting up of the cooking utensil on the hob plate and, in particular, to provide a corresponding electrical signal for the control unit.
  • a number of sensor elements of the setup measuring unit is smaller than a total number of heating units.
  • a "control unit” is to be understood as meaning, in particular, an electronic unit which is at least provided for reading out electrical signals of the set-up measuring unit and for additionally controlling the set-up measuring unit.
  • the control unit comprises a computing unit and, in particular in addition to the computing unit, a memory unit with a control and / or regulating program stored therein.
  • the control unit with a control and / or regulating unit of the hob, which is intended to control at least the heating unit and / or to regulate, at least partially formed in one piece.
  • a "signal" received by the installation measuring unit is understood to mean a value of a physical variable which is characteristic for setting up the cooking utensil on the hob plate and detected by the installation measuring unit.
  • a "Aufstellpositionsbetician” should be understood in this context, in particular a preferably controlled by the control unit routine for particular, at least largely accurate determination of the installation position of the cooking utensils on the hob plate.
  • a “at least largely accurate determination "of the installation position of the cooking utensil is to be understood in particular a determination of the installation position of the cooking utensils, wherein a relative deviation of a measured installation position of the actual installation position of the cooking utensil on the cooktop panel at most 30%, in particular at most 20%, preferably at most 10% and
  • the set-up position determination can comprise a plurality of steps, in particular a step for at least coarse determination of the set-up position and a further step for the at least largely accurate determination of the set-up position Determining the installation position of the cooking utensil are understood, in which a relative deviation of a measured Aufstellposition höc from the actual Aufstellposition of the cooking utensils on the hob
  • the Aufstellmessaku may be at least partially formed integrally with a sensor unit, which is intended to sense the Aufstellposition in the Aufstellpositionsbeées, especially in the at least largely accurate determination and / or at least coarse determination of the installation position of the cooking utensils.
  • the installation measuring unit and the sensor unit can use identical and preferably the same sensor elements or sensor elements that are different from one another, in particular also of different types.
  • the setup measuring unit is designed differently from this sensor unit.
  • a Garware detection can be optimized.
  • a permanent and autonomous monitoring in particular without manual starting of a cooking utensil detection by an operator, can be achieved with regard to setting up a cooking utensil on the hob plate, while still keeping energy consumption advantageously low.
  • heating units are constantly cyclically actuated in a matrix cooktop in a known manner and to make a position determination.
  • a constant movement of the heating unit can be avoided in the case of a hob with at least one heating unit movably arranged below the hob plate.
  • the hob recognizes this, switches to an active state and requests an operator input of a heating power and / or a cooking program for heating the cooking utensil.
  • a period of time from setting up a cooking utensil to a start of a heating process can be advantageously shortened.
  • the erection measuring unit has only a low energy requirement, an advantageously high energy efficiency can be achieved with simultaneously advantageously high ease of use.
  • a special operating intervention of an operator to start a cooking utensil detection is superfluous.
  • a "matrix cooktop” is to be understood, in particular, as a cooktop in which the heating units are arranged in a preferably regular grid under the cooktop panel and a region of the cooktop panel which can be heated by means of the heating units is preferably at least 60%, in particular at least 70%. advantageously comprises at least 80% and particularly advantageously at least 90% of the surface of the hob plate.
  • the matrix cooktop comprises at least 10, in particular at least 20, advantageously at least 30 and particularly advantageously at least 40 heating units.
  • a "heating unit movably arranged below the cooktop panel” should be understood to mean, in particular, a heating unit which, in particular, is movable parallel to the cooktop panel via a guide unit below the cooktop panel.
  • the guide unit has at least one drive unit for moving the heating unit.
  • the installation measuring unit comprises at least two installation sensors communicating with the hob plate.
  • a "setup sensor” is to be understood here and below as meaning, in particular, a sensor unit which is intended to detect the setting up of the cooking utensil on the hob plate, in particular via physical parameters which occur when setting up the cooking utensil and / or change characteristically, in particular an acceleration and / or an expansion and / or a sound pressure level and / or a vibration.
  • the erection sensors can be any sensors which appear sensible to a person skilled in the art, but preferably strain gauges or vibration sensors, in particular accelerometers and / or microphones.
  • a “vibration sensor” is to be understood in particular as meaning a sensor unit which is intended to detect vibrations generated by the setting up of the cooking utensil on the hob plate, in particular those which are generated in the hob plate and spread there.
  • An “accelerometer” is to be understood in particular as meaning a sensor unit which is provided to measure an acceleration, in particular by determining an inertial force acting on a test mass.
  • the acceleration unit may be any acceleration unit which appears expedient to a person skilled in the art, in particular a piezoelectric acceleration unit.
  • the acceleration unit is preferably a miniaturized acceleration unit, which is designed in particular as a micro-electro-mechanical system (MEMS).
  • the sensor unit preferably comprises an amplifier unit for amplifying the measured variable.
  • positioning sensors communicating with the cooktop panel should in particular be understood to mean deployment sensors which are in operative connection with the cooktop panel and, in particular, are preferably in direct contact with it.
  • the positioning unit comprises at least four positioning sensors, a sensitivity can be further advantageously increased since physical properties of the cooking field plate, in particular a temperature dependence of a speed of sound in the cooking field plate, can be regarded as variables in the determination of the mounting position and can thus be determined in real time.
  • the erection sensors are designed as vibration sensors.
  • an advantageously high reliability of Aufstellmessaku be guaranteed because when setting up the Gargeschirrs a noise is generated and this is detected by vibration sensors. Furthermore, costs can be reduced.
  • the control unit is intended to carry out an at least rough determination of the set-up position on the basis of distance parameters, which depend on a respective distance between the set-up sensors and the set-up position.
  • a distance parameter in particular a signal strength and preferably a signal delay in question.
  • a "signal propagation time” is to be understood in particular as meaning a time which a signal, in particular a vibration signal, covers a distance from a first location, in particular a place of origin of the vibration signal, preferably the installation position of the cookware, to a second location, in particular a detection location , preferably a location of one of the Aufstellsensoren needed.
  • the distance parameters signal propagation times.
  • the control unit is provided to use signal propagation time differences in the at least rough determination of the installation position. As a result, a reliability can be increased particularly advantageous.
  • control unit is intended to use a position measuring unit designed differently by the setup measuring unit for the at least largely accurate determination of the set-up position
  • uncertainties in the determination of the set-up position can advantageously be reduced by means of the set-up measuring unit.
  • an exact determination of the position of the cooking utensil can take place when this is displaced, for example, on the hob plate after setting up.
  • an exact determination of the position of the cooking utensil can take place if, for example, when it is placed on the hob plate with an edge of its bottom, it first impinges on the hob plate, whereby the determination of the set-up position by means of the set-up measuring unit becomes inaccurate.
  • a "position measuring unit” is to be understood in this context, in particular a unit which is provided for at least largely accurate determination of the installation position of the cooking utensils on the hob plate.
  • the position measuring unit can be configured in any way that appears appropriate to a person skilled in the art. For example, it may have an optical camera with which the hob plate is filmed so as to determine the mounting position. Furthermore, a laser-assisted position measuring unit is conceivable.
  • the hob device comprises at least one heating unit, which is at least partially formed integrally with the position measuring unit.
  • the position measuring unit may be integrally formed with a plurality of heating units, in particular with a plurality of heating units arranged in the manner of a matrix.
  • the heating unit has at least one induction heater.
  • the at least largely accurate determination of the installation position preferably takes place by means of a method known to a person skilled in the art, in which, for example, an attenuation of a resonant circuit comprising the induction heater is detected occurring due to eddy currents induced in the erected cooking utensil.
  • an advantageous position measuring unit can be provided.
  • components can be used can be saved, which on the one hand a mounting effort and on the other hand costs can be reduced.
  • the positioning measuring unit comprises at least one electromagnetic sensor which is provided to detect at least one electromagnetic variable.
  • An "electromagnetic quantity" is intended in particular to be an electrical variable, in particular an electric field strength, a change in an electric field strength, an electric current strength, an electrical resistance, a frequency or amplitude of an alternating electric current or an alternating electric field, an electrical capacitance or an induction voltage, and / or a magnetic quantity, in particular a magnetic field strength, a change in a magnetic field strength, a frequency or amplitude of an alternating magnetic field, or an inductance.
  • the electromagnetic sensor can be, for example, a coil, which is excited in particular to electromagnetic oscillations, around a magnetoresistive sensor, which is intended in particular to detect a change in a geomagnetic field due to the presence of a ferromagnetic cooking utensil, a capacitive sensor, which in particular is intended to detect a presence of a Gargeschirrs by a change in capacity, and / or an optical sensor, in particular an infrared and / or image sensor, preferably a CCD sensor act.
  • the setup measuring unit in this case comprises a detection electronics connected to the electromagnetic sensor, which can in particular also be provided to supply the electromagnetic sensor with energy, in particular electromagnetic energy.
  • the electromagnetic sensor is designed as a capacitive sensor, a cost-effective coarse set-up detection can be implemented.
  • the electromagnetic sensor is designed as a coil.
  • the coil is arranged below the hob plate along an outer edge region of a heating region of the hob plate. Windings of the coil preferably surround at least a majority of, and particularly advantageously all heating units of the hob.
  • at least a majority of the heating units of the cooktop is to be understood in particular a proportion of at least 60%, in particular of at least 70%, preferably of at least 80% and particularly advantageously of at least 90% of all heating units of the cooktop.
  • an advantageously flexible deployment measuring unit can be provided.
  • the coil is designed as an air coil, costs can be reduced.
  • an advantageous space utilization can be made possible.
  • the erection measuring unit is additionally provided for detecting a change in a set-up configuration of cooking utensils parked on the hob plate, operating convenience can be further increased.
  • an automatic switch-on function can be implemented when a cooking utensil is displaced on the hob plate.
  • the at least largely accurate determination of the installation position of the cooking utensil can also be started when the cooking utensil is displaced.
  • a "change in a set-up configuration of cooking utensils placed on the cooktop panel” should be understood as meaning, in particular, a change in a position and / or, in the case of oblong cooking utensils, an angular orientation of at least one cooking utensil parked on the cooktop panel relative to the cooktop panel.
  • the set-up measuring unit comprises at least one positioning sensor which communicates with the hob plate
  • the positioning sensor is additionally provided to detect a change in a set-up configuration of cooking utensils placed on the hob plate, in particular via physical parameters which occur when changing the set-up configuration and / or characteristic change, in particular an acceleration and / or an elongation and / or a sound pressure level and / or a vibration.
  • the Aufstellmessappel at least one electromagnetic Sensor comprises, the electromagnetic sensor is in particular additionally provided to detect a change in a Aufstellkonfiguration of parked on the cooking plate cooking utensils, in particular via a change in a detected by the electromagnetic sensor electromagnetic quantity.
  • a method is proposed with a cooktop device with a cooktop panel with an at least substantially free Aufstellposition for heating a Gargeschirrs and with a Aufstellmessaku, in which a Aufstellpositionsbeées is initiated upon receipt of a signal by the Aufstellmessaku.
  • a Garware detection can be optimized.
  • a cooktop in particular an induction cooktop, with a cooktop device according to the invention is proposed.
  • the hob can be designed in particular as a matrix hob. In this way, a hob can be provided with an optimized cookingware detection.
  • the hob comprises at least one heating unit movably arranged below the hob plate.
  • a cost-effective cooktop with an at least substantially free installation position for heating a cooking utensil can be provided.
  • costs for additional induction heaters and / or inverters can be saved.
  • the hob comprises a plurality of heating units arranged in a matrix-like manner under the cooktop plate, in particular in a stationary manner.
  • FIG. 1 shows a cooktop 36a designed as induction hob 38a.
  • the hob 36a comprises a hob according to the invention.
  • the hob device has a hob plate 10a.
  • the hob plate 10a consists of a glass ceramic.
  • the hob plate 10a is arranged horizontally and provided for setting up cooking utensils 14a for heating thereof.
  • a marking 40a which is applied to the hob plate 10a in a manner known to a person skilled in the art, a heating region 42a on the cooking field plate 10a is separated from an operating region 44a.
  • the cooktop 36 a comprises an operator interface 46 a, which in Fig. 1 is shown only schematically.
  • the operator interface 46a includes a display unit and a plurality of touch-sensitive keys.
  • the hob 36a is provided for setting up the cooking utensil 14a to an arbitrary set-up position 12a within the heating area 42a.
  • the hob device has at least one heating unit 16a arranged movably below the hob plate 10a (in FIG Fig. 1 shown schematically and dashed).
  • the heating unit 16a has at least one induction heater for inductive heating of the cooking utensil 14a.
  • the heating unit 16a is supported by a guide unit which allows a movement of the heating unit 16a and adjustment of a position of the heating unit 16a to the erecting position 12a of the cooking utensil 14a (not shown).
  • the hob device further, in Fig. 1 Not shown heating units include, which preferably also comprise at least one induction heater and which are also movably mounted on guide units below the hob plate 10a.
  • the cooktop apparatus further comprises an installation measuring unit 18a and a control unit 20a below the cooktop panel 10a (in FIG Fig. 1 shown in dashed lines).
  • the control unit 20a is provided to initiate a set-up position determination upon receipt of a signal by the set-up measuring unit 18a (cf. Fig. 2 ).
  • the installation measuring unit 18a comprises a positioning sensor 22a designed as a vibration sensor 28a (in FIG Fig. 1 shown in dashed lines).
  • the positioning sensor 22a is arranged below the operating area 44a of the hob plate 10a (in FIG Fig. 1 shown in dashed lines).
  • the positioning sensor 22a is attached to an underside of the hob plate 10a.
  • the positioning sensor 22a is as an accelerometer is formed.
  • the positioning sensor 22a is provided to detect sound waves occurring during the installation of the cooking utensil 14a in the hob plate 10a.
  • the hob device further comprises a position measuring unit 34a designed differently by the setting-up measuring unit 18a, which is provided for an at least largely accurate determination of the set-up position 12a.
  • the position measuring unit 34a is formed integrally with the heating unit 16a.
  • the control unit 20a causes the Aufstellpositionsbeées.
  • the installation position 12a is determined by means of the position measuring unit 34a. For this purpose, use is made of a method already known to a person skilled in the art.
  • the heating unit 16a is slowly moved in a regular search pattern below the cooking field plate 10a. At regular short intervals or alternatively continuously, the induction heater of the heating unit 16a is operated with high-frequency AC voltage. If the heating unit 16a is located below the cooking utensil 14a, this is detectable on the basis of a characteristic current profile in the induction heater.
  • FIG. 2 shows a flow chart of Aufstellpositionsbeées. It is assumed at the beginning that the hob 36a is in a resting state. The power supplies of all the heating units 16a and the user interface 46a are interrupted. Only the control unit 20a operates in a low-energy state and supplies the setup sensor 22a of the setup measurement unit 18a with energy. In a step 60a, let it be assumed that the positioning sensor 22a detects a vibration. The control unit 20a thereby transitions from the low energy state to a normal operation state.
  • the control unit 20a can again switch to the low-energy state.
  • the vibration is actually for setting up the Garde 14a on the hob plate 10a in question or if a frequency analysis is not performed, the Aufstellpositionsbeées is initiated by the control unit 20a with a step 68a.
  • step 68a the heating unit 16a is used to search for the installation position 12a of the cooking utensil 14a.
  • the control unit 20a checks whether the set-up position 12a has been found. If so, then the control unit 20a causes in a step 72a via the user interface 46a an operating request for the selection of cooking parameters for the cooking utensil 14a. If the set-up position 12a has not been found, an error message is output via the user interface 46a in a step 74a. Alternatively or additionally, an acoustic signal may be provided.
  • step 76a the control unit 20a returns to the low energy state immediately or alternatively after a predetermined time.
  • Fig. 3 to 9 three further embodiments of the invention are shown.
  • the following descriptions are essentially limited to the differences between the embodiments, with respect to the same components, features and functions on the description of the other embodiments, in particular the Fig. 1 and 2 , can be referenced.
  • the letter a in the reference numerals of the embodiment in Fig. 1 and 2 by the letters b, c and d in the reference numerals of the embodiments of Fig. 3 to 9 replaced.
  • identically designated components in particular with regard to components with the same reference numerals, can in principle also to the drawings and / or the description of the other embodiments, in particular the Fig. 1 and 2 , to get expelled.
  • FIG. 3 shows a trained as induction cooktop 38b hob 36b with an alternative cooktop device.
  • the cooktop device comprises an installation measuring unit 18b with two erecting sensors 22b, 24b designed as vibration sensors 28b, 30b.
  • the erection sensors 22b, 24b are again below an operating area 44b of a hob plate 10b.
  • the erection sensors 22b, 24b are arranged in an environment of opposite short sides of the operation area 44b (in FIG Fig. 3 shown in dashed lines).
  • the erection sensors 22b, 24b are attached to an underside of the hob plate 10b.
  • the erection sensors 22b, 24b are also designed as accelerometers.
  • the erection sensors 22b, 24b are intended to detect sound waves occurring when setting up a cooking utensil 14b in the hob plate 10b.
  • a control unit 20b is provided to make an at least rough determination of a set-up position 12b of the cooking utensil 14b on the basis of distance parameters which depend on a respective distance of the set-up sensors 22b, 24b to the set-up position 12b. As distance parameters, signal propagation times are available in the present case.
  • FIG. 4 shows a flow chart of Aufstellpositionsbeées. It is assumed at the beginning that the hob 36b is in an idle state. The power supplies of all the heating units 16b and an operator interface 46b are interrupted. Only the control unit 20b operates in a low energy state and supplies the erection sensors 22b, 24b of the setup measuring unit 18b with energy. In a step 60b, assume that one of the erection sensors 22b, 24b registers a vibration. The control unit 20b then starts the Aufstellpositionsbeées. The control unit 20b waits for a corresponding detection of the vibration by the respective other positioning sensor 22b, 24b.
  • the control unit 20b If the detection by the other setting sensor 22b, 24b fails within a short period of time, the control unit 20b remains in the low energy state. If the other positioning sensor 22b, 24b also detects the vibration in a step 62b, the control unit 20b goes from the low energy state in a normal operating state via. In a step 64b, it can be provided, in particular, to check by means of a frequency analysis whether the oscillation registered by the positioning sensors 22b, 24b is actually a vibration which is caused by placing a metallic object, in particular the cooking utensil 14b, on the Hob plate 10b is formed. If this is not the case, the control unit 20b can again switch to the low-energy state.
  • the control unit 20b concludes from the fact that the vibration was detected by one of the erection sensors 22b, 24b earlier than by the other that the mounting position 12b must be closer to the Aufstellsensor 22b, 24b, which could detect the vibration first.
  • the half-space 48b, 50b, in which the set-up position 12b is arranged, is therefore known in step 64b.
  • a step 68b as described above, with the aid of the heating unit 16b in the corresponding half-space 48b, 50b, the installation position 12b of the cooking utensil 14b is searched for.
  • a step 70b it is checked by the control unit 20b whether the set-up position 12b has been found. If so, then the control unit 20b causes in a step 72b via the operator interface 46b an operating request for the selection of cooking parameters for the cooking utensil 14b. If the set-up position 12b was not found, an error message is output in a step 74b via the user interface 46b. Alternatively or additionally, an acoustic signal may be provided.
  • the control unit 20b returns to the low energy state immediately or alternatively after a predetermined time.
  • FIG. 5 shows a trained as induction cooktop 38c cooktop 36c with another cooktop device.
  • the cooktop apparatus comprises an installation measuring unit 18c with three erecting sensors 22c, 24c, 26c designed as vibration sensors 28c, 30c, 32c.
  • Two of the erection sensors 22c, 24c are disposed below an operation area 44c of a cooktop panel 10c (in FIG Fig. 5 shown in dashed lines).
  • the erection sensors 22c, 24c are arranged in an environment of opposite short sides of the operation area 44c.
  • One of the erecting sensors 26c is disposed in a vicinity of a side 52c of the cooking hob plate 10c opposite to the operating portion 44c below a heating portion 42c of the cooking hob plate 10c.
  • the positioning sensor 26c is centered relative to the side 52c of the cooking field plate 10c.
  • the erection sensors 22c, 24c, 26c are attached to an underside of the cooktop panel 10c.
  • the erection sensors 22c, 24c, 26c are also designed as accelerometers.
  • the erection sensors 22c, 24c, 26c are intended to detect sound waves occurring when setting up a cooking utensil 14c in the hob plate 10c.
  • a control unit 20c is provided to make an at least rough determination of a set-up position 12c of the cooking utensil 14c on the basis of distance parameters, which depend on a respective distance of the set-up sensors 22c, 24c, 26c to the set-up position 12c.
  • signal transit times are also suitable here.
  • the control unit 20c starts a set-up position determination (cf. Fig. 7 ). Since the sound waves reach the set-up sensors 22c, 24c, 26c at different times depending on an installation position 12c of the cooking utensil 14c, an approximate two-dimensional position determination can be made as follows.
  • (x 1 , y 1 ), (x 2 , y 2 ) and (x 3 , y 3 ) be the two-dimensional location coordinates of the setup sensors 22c, 24c, 26c relative to a coordinate origin (0, 0) on the hob plate 10c. Further, let (x, y) be the two-dimensional one Location coordinate of the installation position 12c on the hob plate 10c relative to the coordinate origin (0, 0). The speed of sound in the hob plate 10c is c.
  • c c x 1 2 + c y 1 2 1 / 2 .
  • c c x2 2 + c y 2 2 1 / 2 .
  • c c x3 2 + c y 3 2 1 / 2 and nine unknowns x, y, t 1 , c x1 , c y1 , c x2 , c y2 , c x3 and c y3 .
  • the time duration t 1 which requires the oscillation signal from the point of origin of the set-up position 12 c to the set-up sensor 24 c at the location coordinates (x 1 , y 1 ), is an unknown.
  • the control unit 20c is provided to solve this equation system with the known parameters x 1 , y 1 , x 2 , y 2 , x 3 , y 3 , ⁇ t 2, ⁇ t 3 and c.
  • FIG. 7 shows a flow chart of Aufstellpositionsbeées. It is assumed at the beginning that the hob 36c is in a state of rest. The power supplies of all the heating units 16c and an operator interface 46c are interrupted. Only the control unit 20c operates in a low energy state and supplies the erection sensors 22c, 24c, 26c of the setup measuring unit 18c with energy. In a step 60c, let us assume one of the positioning sensors 22c, 24c, 26c register a vibration. The control unit 20c then starts the Aufstellpositionsbeées. The control unit 20c waits for a corresponding detection of the oscillation by the respectively other set-up sensors 22c, 24c, 26c.
  • the control unit 20c If the detection by the other setting sensors 22c, 24c, 26c fails within a short period of time, the control unit 20c remains in the low energy state. If the other erection sensors 22c, 24c, 26c also detect the oscillation in a step 62c with propagation time differences ⁇ t 2 and ⁇ t 3 , the control unit 20c changes from the low-energy state into a normal operating state. In a step 64c, it can be provided, in particular, to check by means of a frequency analysis whether the vibration registered by the erection sensors 22c, 24c, 26c is actually a vibration which is caused by setting up a metallic object, in particular the cooking utensil 14c. on the hob plate 10c arises.
  • control unit 20c can again switch to the low-energy state. However, if the oscillation is actually in question for placing the cooking utensil 14c on the cooktop panel 10c or if frequency analysis is not performed, the control unit 20c calculates the approximate location coordinates (x, y) of the erecting position 12c in step 64c using the above equation system ,
  • a step 68c as described above, with the aid of the heating unit 16c in an environment of the location coordinates (x, y), the exact set-up position 12c of the cooking utensil 14c is searched for.
  • the control unit 20c checks whether the set-up position 12c has been found. If so, then the control unit 20c causes in a step 72c via the user interface 46c an operating request for the selection of cooking parameters for the cooking utensil 14c. If the set-up position 12c was not found, an error message is output in a step 74c via the user interface 46c. Alternatively or additionally, an acoustic signal may be provided.
  • a step 76c the control unit 20c returns to the low energy state immediately or alternatively after a predetermined time.
  • a hob instead of a hob with at least one movable heating unit is designed as a matrix hob with a plurality of heating units arranged in a matrix.
  • a position measuring unit in particular a position measuring unit integrally formed at least partially with a heating unit, is completely dispensed with and in particular only the set-up measuring unit is used to determine a set-up position of a cooking utensil on a hob plate.
  • an operator interface it is conceivable for an operator interface to have a touchscreen on which found heating zones are displayed and can be selected directly, in particular for selecting a heating stage.
  • a Aufstellmessaku is additionally provided to detect a change in a set-up of parked on a cooktop plate cooking utensils.
  • FIG. 8 shows a trained as induction hob 38d hob 36d.
  • the cooktop 36d comprises a further cooktop device according to the invention.
  • the hob 36d is provided for setting up cooking utensils 14d to an arbitrary set-up position 12d within a heating area 42d of a hob plate 10d.
  • the cooktop apparatus has a plurality of heating units 16d arranged in a matrix manner under the cooktop panel 10d, of which in Fig. 8 only one is shown schematically and dashed.
  • the cooktop 36d is thus designed as a matrix cooktop 84d.
  • the heating units 16d each comprise at least one induction heater for inductive heating of the cooking utensil 14d.
  • a control unit 20d of the cooktop device controls a power supply of the heating units 16d covered by the cooking utensil 14d for heating the cooking utensil 14d.
  • the cooktop device has below the cooktop panel 10d a Aufstellmesstechnik 18d (in Fig. 8 shown in dashed lines).
  • the control unit 20d is provided to initiate a set-up position determination upon receipt of a signal by the set-up measuring unit 18d (cf. FIGS. 9 and 10 ).
  • the erection measuring unit 18d is additionally provided to detect a change in a set-up configuration of cooking utensils 14d set down on the hob plate 10d.
  • the erection measuring unit 18d includes an electromagnetic sensor 78d which is provided to detect an electromagnetic quantity.
  • the electromagnetic sensor 78d is formed as a coil 80d.
  • the coil 80d is an air coil 86d.
  • the coil 80d is wound along an outer portion of the heating portion 42d.
  • a coil surface of the coil 80d is parallel to the hob plate 10d. Windings of the coil 80d surround all heating units 16d of the hob 36d.
  • the installation measuring unit 18d comprises detection electronics 82d for controlling the electromagnetic sensor 78d.
  • the detection electronics 82d comprises a resistor, via which an alternating voltage is applied to the coil 80d in an operating state. An amplitude of the alternating voltage is preferably at most 24 V.
  • the alternating voltage applied to the coil 80d produces a magnetic alternating field penetrating the coil surface.
  • an alternating current flowing through the coil 80d is established, which is measured by a sensor unit of the detection electronics 82d.
  • the alternating current occurring in the coil 80d depends on an environment of the coil 80d, in particular also on an environment of the hob 36d.
  • the control unit 20d is provided in a calibration step 88d, 90d, 100d (see FIG. FIGS. 9 and 10 ) to perform a calibration such that during the calibration step 88d, 90d, 100d adjusting alternating current is stored as a certain Aufstellkonfiguration of cooking utensils 14d on the hob plate 10d alternating current. Any future deviation of the alternating current from the characteristic alternating current is judged by the control unit 20d as an event triggering a set-up position determination.
  • FIG. 9 shows a flowchart of a first variant of Aufstellpositionsbeées. It is assumed at the beginning that the hob 36d is in an idle state. Power supplies of all the heating units 16d and an operator interface 46d are interrupted. Only the control unit 20d operates in a low energy state and supplies the detection electronics 82d of the setup measuring unit 18d with energy. Suppose a cooking utensil 14d is placed on the cooktop panel 10d. Then, in a step 60d detected by the detection electronics 82d, a deviation of the alternating current from a previously determined and stored in the control unit 20d characteristic AC. The control unit 20d then starts the Aufstellpositionsbeées. The control unit 20d transitions from the low power state to a normal operation state.
  • a step 68d an installation position 12d of the cooking utensil 14d is searched with the aid of the heating units 16d.
  • the heating units 16d are briefly operated individually or jointly in order to detect a covering of the respective heating unit 16d with at least one part of the cooking utensil 14d in a manner known per se to the person skilled in the art.
  • the control unit 20d checks whether the set-up position 12d has been found. If so, the control unit 20d causes in a step 72d via the user interface 46d an operating request for the selection of cooking parameters for the cooking utensil 14d. Further, the calibration step 90d is started to set a new characteristic AC current.
  • an error message is output in a step 74d via the user interface 46d.
  • an acoustic signal may be provided.
  • the calibration step 88d is started to set a new characteristic AC current.
  • the control unit 20d returns immediately or alternatively after a predetermined time back to the low energy state.
  • FIG. 10 shows a flowchart of a second variant of Aufstellpositionsbeées.
  • the hob 36d is in an operating state and heats at least one cooking utensil 14d.
  • a cooking utensil 14d already set down on the hob plate 10d is displaced and / or rotated or removed, or another cooking utensil is placed on the hob plate 10d.
  • a deviation of the alternating current from a previously determined and stored in the control unit 20d characteristic alternating current.
  • the control unit 20d then starts the Aufstellpositionsbeées.
  • a step 94d as already described above, with the aid of the heating units 16d it is searched for set-up positions 12d of cooking utensils 14d.
  • a step 96d it is checked by the control unit 20d whether a new cooking utensil has been added. If so, the control unit 20d causes in a step 98d via the user interface 46d an operating request for the selection of cooking parameters for the new cooking utensils. Further, the calibration step 100d is started to set a new characteristic AC current. If no new cooking utensils were found, it is determined in a step 104d by the control unit 20d whether at least one cooking utensil 14d has gone crazy.
  • the control unit 20d reconfigures the heating units 16d to heat the new set-up configuration of the cooking utensils 14d. Further, the calibration step 100d is started to set a new characteristic AC current. If no cooking utensil 14d has gone wrong, an error message is output via the user interface 46d in a step 108d. Alternatively or additionally, an acoustic signal may be provided. Further, the calibration step 100d is started to set a new characteristic AC current.
  • a different control of a coil by detection electronics is conceivable.
  • a detection electronics be provided to determine a natural frequency of the coil having a resonant circuit.
  • a detection electronics can be provided to apply a voltage pulse to the coil, wherein a time-delayed, occurring on the coil induced voltage pulse indicates the presence of a Gargeschirrs.
  • deviating electromagnetic sensors are conceivable, in particular a magnetoresistive sensor which is intended to detect changes in an earth's magnetic field induced by the presence of a cookware.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Induction Heating Cooking Devices (AREA)
  • Electric Stoves And Ranges (AREA)
  • Electric Ovens (AREA)

Claims (12)

  1. Dispositif de table de cuisson comprenant une plaque de table de cuisson (10a - d) ayant une position de pose (12a - d) au moins essentiellement libre pour un échauffement d'un récipient de cuisson (14a - d), comprenant une unité de mesure de pose (18a - d) réalisée de manière différente d'une unité de chauffage (16a - d), laquelle unité de mesure de pose est ménagée pour détecter la pose du récipient de cuisson (14a - d) sur la plaque de table de cuisson (10a - d), et comprenant une unité de commande (20a - d) qui est ménagée pour introduire une détermination de position de pose lors d'une réception d'un signal par l'unité de mesure de pose (18a - d), le signal étant une valeur d'une grandeur physique, caractéristique pour la pose du récipient de cuisson (14a - d) sur la plaque de table de cuisson (10a - d) et détectée par l'unité de mesure de pose (18a - d), l'unité de mesure de pose (18b ; 18c) comprenant au moins deux capteurs de pose (22b, 24b ; 22c, 24c, 26c) communiquant avec la plaque de table de cuisson (10b ; 10c), et l'unité de commande (20b ; 20c) étant ménagée pour effectuer une détermination au moins grossière de la position de pose (12b ; 12c) sur la base de paramètres d'écart, lesquels dépendent d'un écart respectif des capteurs de pose (22b, 24b ; 22c, 24c, 26c) par rapport à la position de pose (12b ; 12c), caractérisé en ce que l'unité de commande (20a - d) est ménagée pour utiliser une unité de mesure de position (34a - d) réalisée de manière différente de l'unité de mesure de pose (18a - d) pour la détermination au moins largement précise de la position de pose (12a - d).
  2. Dispositif de table de cuisson selon la revendication 1, caractérisé en ce que les capteurs de pose (22b, 24b ; 22c, 24c, 26c) sont réalisés comme capteurs de vibration (28b, 30b ; 28c, 30c, 32c).
  3. Dispositif de table de cuisson selon la revendication 1 ou 2, caractérisé en ce que les paramètres d'écart sont des temps de propagation de signal.
  4. Dispositif de table de cuisson selon l'une quelconque des revendications précédentes, caractérisé par au moins une unité de chauffage (16a - d) qui est réalisée au moins en partie d'une seule pièce avec l'unité de mesure de position (34a - d).
  5. Dispositif de table de cuisson selon la revendication 1, caractérisé en ce que l'unité de mesure de pose (18d) comprend au moins un capteur électromagnétique (78d) qui est ménagé pour détecter au moins une grandeur électromagnétique.
  6. Dispositif de table de cuisson selon la revendication 5, caractérisé en ce que le capteur électromagnétique (78d) est réalisé comme une bobine (80d).
  7. Dispositif de table de cuisson selon l'une quelconque des revendications précédentes, caractérisé en ce que l'unité de mesure de pose (18d) est en outre ménagée pour détecter une modification d'une configuration de pose d'un récipient de cuisson (14d) posé sur la plaque de table de cuisson (10d).
  8. Procédé avec un dispositif de table de cuisson comprenant une plaque de table de cuisson (10a - d) ayant une position de pose (12a - d) au moins essentiellement libre pour un échauffement d'un récipient de chauffage (14a - d), et comprenant une unité de mesure de pose (18a - d) réalisée de manière différente d'une unité de chauffage (16a - d), laquelle unité de mesure de pose est ménagée pour détecter la pose du récipient de cuisson (14a - d) sur la plaque de table de cuisson (10a - d), selon l'une quelconque des revendications précédentes, dans lequel, lors d'une réception d'un signal, une détermination de position de pose est introduite par l'unité de mesure de pose (18a - d), le signal étant une valeur d'une grandeur physique, caractéristique pour la pose du récipient de cuisson (14a - d) sur la plaque de table de cuisson (10a - d) et détectée par l'unité de mesure de pose (18a - d), l'unité de mesure de pose (18b ; 18c) comprenant au moins deux capteurs de pose (22b, 24b ; 22c, 24c, 26c) communiquant avec la plaque de table de cuisson (10b ; 10c), et une détermination au moins grossière de la position de pose (12b ; 12c) étant effectuée par une unité de commande (20b ; 20c) sur la base de paramètres d'écart, lesquels dépendent d'un écart respectif des capteurs de pose (22b, 24b ; 22c, 24c, 26c) par rapport à la position de pose (12b ; 12c), caractérisé en ce qu'une unité de mesure de position (34a - d) réalisée de manière différente de l'unité de mesure de pose (18a - d) est utilisée par l'unité de commande (20a - d) pour la détermination au moins largement précise de la position de pose (12a - d).
  9. Procédé avec un dispositif de table de cuisson comprenant une plaque de table de cuisson (10a - d) ayant une position de pose (12a - d) au moins essentiellement libre pour un échauffement d'un récipient de chauffage (14a - d), et comprenant une unité de mesure de pose (18a - d) réalisée de manière différente d'une unité de chauffage (16a - d), laquelle unité de mesure de pose est ménagée pour détecter la pose du récipient de cuisson (14a - d) sur la plaque de table de cuisson (10a - d), dans lequel, lors d'une réception d'un signal, une détermination de position de pose est introduite par l'unité de mesure de pose (18a - d), le signal étant une valeur d'une grandeur physique, caractéristique pour la pose du récipient de cuisson (14a - d) sur la plaque de table de cuisson (10a - d) et détectée par l'unité de mesure de pose (18a - d), l'unité de mesure de pose (18b ; 18c) comprenant au moins deux capteurs de pose (22b, 24b ; 22c, 24c, 26c) communiquant avec la plaque de table de cuisson (10b ; 10c), une détermination au moins grossière de la position de pose (12b ; 12c) étant effectuée par une unité de commande (20b ; 20c) sur la base de paramètres d'écart, lesquels dépendent d'un écart respectif des capteurs de pose (22b, 24b ; 22c, 24c, 26c) par rapport à la position de pose (12b ; 12c), caractérisé en ce qu'une unité de mesure de position (34a - d) réalisée de manière différente de l'unité de mesure de pose (18a - d) est utilisée par l'unité de commande (20a - d) pour la détermination au moins largement précise de la position de pose (12a - d).
  10. Table de cuisson (36a - d), notamment table de cuisson à induction (38a - d), comprenant un dispositif de table de cuisson selon l'une quelconque des revendications 1 à 7.
  11. Table de cuisson (36a - c) selon la revendication 10, caractérisée par au moins une unité de chauffage (16a - c) disposée de manière mobile en dessous de la plaque de table de cuisson (10a - c).
  12. Table de cuisson (36d) selon la revendication 10 ou 11, caractérisée par une pluralité d'unités de chauffage (16d) disposées de manière matricielle en dessous de la plaque de table de cuisson (10d).
EP12382420.3A 2011-11-29 2012-10-31 Plaque de cuisson Active EP2600691B1 (fr)

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DE102015105452A1 (de) * 2015-04-10 2016-10-13 Miele & Cie. Kg Verfahren zum Betrieb eines Kochfeldes sowie ein Kochfeld
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
EP3500064A1 (fr) * 2017-12-14 2019-06-19 Vestel Elektronik Sanayi ve Ticaret A.S. Cuisinière et système de détection de position de récipient de cuisson
EP3879925A1 (fr) * 2020-03-12 2021-09-15 Electrolux Appliances Aktiebolag Appareil ménager doté de moyens de détection et/ou de mesure d'accélération et unité de commande et procédé de commande d'un appareil ménager

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BE1031174A1 (de) 2022-12-21 2024-07-15 Miele & Cie Verfahren zum Betrieb eines Bediensystems sowie Betriebsvorrichtung und bewegliche Bedienvorrichtung

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EP2600691A2 (fr) 2013-06-05
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EP2600690A2 (fr) 2013-06-05

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