EP2852249B1 - Cooking hob - Google Patents

Cooking hob Download PDF

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Publication number
EP2852249B1
EP2852249B1 EP14183193.3A EP14183193A EP2852249B1 EP 2852249 B1 EP2852249 B1 EP 2852249B1 EP 14183193 A EP14183193 A EP 14183193A EP 2852249 B1 EP2852249 B1 EP 2852249B1
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EP
European Patent Office
Prior art keywords
switching
unit
switching element
sensor unit
control unit
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.)
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Application number
EP14183193.3A
Other languages
German (de)
French (fr)
Other versions
EP2852249A1 (en
Inventor
Daniel Anton Falcon
Sergio Llorente Gil
Diego Puyal Puente
Isidro Urriza Parroque
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
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Publication date
Application filed by BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Publication of EP2852249A1 publication Critical patent/EP2852249A1/en
Application granted granted Critical
Publication of EP2852249B1 publication Critical patent/EP2852249B1/en
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    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00Heating by electric, magnetic or electromagnetic fields
    • H05B6/02Induction heating
    • H05B6/06Control, e.g. of temperature, of power
    • H05B6/062Control, e.g. of temperature, of power for cooking plates or the like
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00Heating by electric, magnetic or electromagnetic fields
    • H05B6/02Induction heating
    • H05B6/10Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/12Cooking devices
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/002Monitoring or fail-safe circuits
    • H01H2047/006Detecting unwanted movement of contacts and applying pulses to coil for restoring to normal status
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/002Monitoring or fail-safe circuits

Definitions

  • the invention relates to a hob device according to the preamble of claim 1.
  • the object of the invention is in particular to provide a generic device with improved properties in terms of high flexibility and / or low cost.
  • the object is achieved by the features of
  • Claim 11 relates to a method for operating a hob device.
  • the invention is based on a cooktop device, in particular an induction cooktop device, with at least one switching unit which comprises at least one switching element which is intended to switch reversibly between at least two switching states and to guide, in particular conduct, a heating element current in at least one operating state, and with at least one sensor unit at least for a detection of a contact production of the switching element. It is proposed that the sensor unit is arranged at least substantially outside at least one circuit which comprises the switching unit.
  • a “switching element” is to be understood in particular an electrical and / or electronic element which is provided to produce and / or to separate an electrically conductive connection between two points, in particular contact points of the switching element.
  • the switching element has at least one control contact, via which the switching element can be switched.
  • the switching element is provided to receive by means of the control contact at least one control signal, in particular of at least one control unit, and to change at least one switching state as a function of the control signal.
  • the switching element is designed as a mechanical and / or electromechanical switching element.
  • the switching element is designed as an electromagnetic switching element, in particular as a relay.
  • the switching element comprises at least one switching part which is provided to reversibly establish and / or interrupt a connection between at least one first contact point and at least one second contact point during a switching operation of the switching element.
  • the switching part is at least substantially fixedly arranged at the first contact point.
  • the first contact point is designed as a fixed contact.
  • the second contact point is designed as a changeover contact.
  • the switching part is provided to establish a connection between the first contact point and the second contact point in a first switching state of the switching element.
  • the switching part is provided to disconnect a connection between the first contact point and the second contact point in a second switching state of the switching element and / or to establish a connection between the first contact point and at least one third contact point.
  • the third contact point is designed as a changeover contact.
  • the contact points are designed as power contacts.
  • the switching part is designed as an anchor.
  • the switching part is intended to be set in motion by at least one electrical and / or magnetic driving force.
  • the switching unit comprises at least 2, in particular at least 4, advantageously at least 6, particularly advantageously at least 8 switching elements.
  • the switching unit comprises at most 80, in particular at most 60, advantageously at most 40, particularly advantageously at most 20, preferably at most 10 switching elements.
  • the switching element is intended to "reversibly" to switch between at least two switching states, should be understood in particular that the switching element is intended to switch at least for a first time from a first switching state to a second switching state and to a second time, which is in particular temporally spaced at the first time to switch from the second switching state to the first switching state.
  • a switching operation of the switching element is reversible, advantageously as often executable, in particular repeatable.
  • the cooktop device comprises at least one supply electronics at least for generating the Schuelementstroms.
  • the supply electronics comprises at least one heating frequency unit at least for generating heating element current for operating and / or for supplying at least one heating element.
  • the cooktop device comprises at least one heating element for heating up cooking utensils.
  • the cooktop device comprises at least one control unit at least for controlling the supply electronics and / or the heating element and / or the switching unit.
  • a "control unit” should in particular be understood to mean an electronic unit which is preferably at least partially integrated in a control and / or regulating unit of a cooktop and which is preferably provided to control and / or regulate at least the supply electronics.
  • the control unit preferably 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, which is intended to be executed by the computing unit.
  • the control unit comprises at least one driver electronics at least for generating a control signal for switching the switching element.
  • the control unit is provided to control the supply electronics for operating the heating element, in order in particular to generate the heating element current.
  • the control unit is provided to effect at least one switching operation of the switching element.
  • control unit is intended to transmit at least one control signal to the switching element, in particular to the control contact of the switching element, to stimulate the switching element to a switching operation, in particular to put the switching part of the switching element in motion.
  • the heating frequency unit, the switching unit, in particular with the switching element, and the heating element are part of a common, in particular electrical, advantageously closed circuit.
  • the switching element is provided to enable and / or block supply of the heating element with heating element current as a function of a switching state.
  • the switching element is provided to supply the heating element with Schuelementstrom in the open switching state To block.
  • the switching element is provided to interrupt the circuit comprising the switching unit in the open switching state.
  • the switching element is provided to allow a supply of the heating element with Walkerelementstrom in the closed switching state.
  • the switching element is provided to close in the closed switching state, the circuit comprising the switching unit.
  • the switching element is provided, in the closed switching state, to lead, in particular to conduct, a heating element current flowing through the circuit comprising the switching unit.
  • a "sensor unit” is to be understood in particular as meaning a unit having at least one sensor element which is provided to measure and / or detect and / or detect at least one parameter for detection of a contact production of the switching element.
  • the sensor unit has at least one microphone which is provided for a detection of a contact production of the switching element.
  • the parameter is designed as an acoustic characteristic.
  • the sensor unit is provided to detect at least a number of impacts of the switching part on one of the contact points.
  • the sensor unit is provided to detect at least one acoustic energy of a contact production of the switching element.
  • the sensor unit has at least one time sensor which is provided to detect at least one duration of a bouncing process of the switching part on one of the contact points.
  • a "microphone” is to be understood in particular as an element which is intended to convert at least one acoustic signal, in particular a sound wave, advantageously a sound pressure wave, into at least one electrical signal, in particular at least one electrical voltage, at least in one operating state, in particular to transform.
  • the microphone is intended to detect acoustic signals from a frequency range between 100 Hz and 16000 Hz, at least in one operating state.
  • the cooktop device advantageously in addition to the sensor unit for detecting the contact production of the switching element, comprises at least one further sensor unit, which is provided at least for a detection of an electrical parameter of the circuit comprising the switching unit.
  • the electrical parameter is designed as an electrical voltage and / or as an electrical current strength and / or as a frequency of an electrical current and / or as a resistance.
  • the sensor unit could comprise an acceleration sensor, which could be provided to detect an acceleration of the switching part for detecting a contact-making of the switching element.
  • the sensor unit is provided for detecting a position and / or a movement of the switching part by means of a light beam, in particular a laser beam, for a detection of a contact production of the switching element.
  • the characteristic would be designed as an optical characteristic.
  • the sensor unit comprises a multi-pole change-over switch for a detection of a contact production of the switching element to a measurement of a switching state of the switching element.
  • the sensor unit comprises a further switching element whose switching part is mechanically connected to the switching part of the switching element, thereby to enable the measurement of a switching state of the switching element.
  • the sensor unit and the switching unit are arranged at least substantially without electrical interaction with each other.
  • the sensor unit and the switching unit are coupled at least in an operating state only via acoustic signals, in particular via sound waves.
  • the sensor unit and the switching unit are supplied at least in an operating state of different voltage transformers.
  • the sensor unit and the switching unit are operated at least in an operating state of different phases.
  • the sensor unit and the switching unit are operated at least in an operating state of a single, common phase.
  • the sensor unit is provided to detect the contact production of the switching element at least substantially independently of a current flowing through the switching element current.
  • the sensor unit and the switching unit are arranged at a distance from one another.
  • the sensor unit and the switching unit have a distance of at least 2 cm, in particular of at least 4 cm, advantageously of at least 5 cm.
  • the sensor unit and the switching unit have a distance of at most 50 cm, in particular of at most 30 cm, advantageously of at most 20 cm.
  • the inventive design can be achieved in particular a high flexibility and / or low cost.
  • the contact production of the switching element can be detected safely and / or precisely.
  • the contact production of the switching element can be detected wirelessly, in particular while avoiding a direct electrical connection between the switching unit and the sensor unit.
  • a functionality of the switching element can be monitored. In particular, possible malfunctions can be detected early.
  • a durable design can be achieved.
  • the sensor unit has at least one, in particular exactly one sensor element which is provided at least for a detection of a contact production of at least two, in particular of at least four, advantageously of at least six, particularly advantageous of all switching elements of the switching unit.
  • the control unit is provided to switch a first switching element of the switching unit at a different time than a second switching element of the switching unit, in particular to avoid a superposition of switching noise and / or to enable a precise measurement of a contact production of the switching element.
  • the control unit is provided to carry out a detection of a contact production of a switching element at a time, which is formed spaced at a time of further contact production of other switching elements.
  • control unit is provided, in particular before an activation of the switching element, advantageously before a contact preparation of the switching element, to predict a contact production of the switching element.
  • control unit is provided to determine at least one switching time window in which a switching operation of a switching element is to be expected.
  • control unit is provided for interpreting a signal detected by the sensor element within the switching time window as switching of the switching element.
  • control unit is provided to assign a signal detected by the sensor element to the switching element, if that of the sensor element detected signal is arranged within the switching time window.
  • control unit is provided to effect exactly one switching operation of exactly one switching element within the switching time window.
  • control unit is provided to refrain from evaluating signals detected by the sensor element during a switching operation of at least two switching elements within the switching time window.
  • a cost-effective and / or flexible design can be achieved.
  • a small number of sensor elements can be achieved.
  • a contact production of a plurality of switching elements can be detected.
  • the cooktop device comprises at least one control unit which is provided to calculate at least one switchover duration of the switching element as a function of the detection of a contact production of the switching element.
  • the switching period is formed as a period of time that the switching element requires from activation to contact making.
  • the switching period is formed as a period of time that the switching part needs to move from the first contact point to the second contact point.
  • the switching part is in motion during the switching period.
  • the sensor unit comprises at least one transmission module for transmitting a switching characteristic to the control unit.
  • the control unit comprises at least one receiving module for receiving switching parameters transmitted by the sensor unit. This can be done in particular a contact of the switching element at a desired time.
  • control unit be provided for the switching period of the switching element after at least substantially 25, in particular after at least substantially 50, advantageously after at least substantially 75, more preferably after at least substantially 100, preferably after at least substantially 150, Particularly advantageously after at least substantially 200, advantageously after at least substantially 500, in particular after at least substantially 1000 switching operations of the switching element to redetermine.
  • control unit is provided to the switching period of the switching element according to at least substantially, in particular after at least substantially 50, advantageously after at least substantially 75, particularly preferably after at least substantially 100, preferably after at least substantially 150, particularly advantageously after at least substantially 200, advantageously after at least substantially 500, in particular after at least substantially new 1000 switching operations of the switching element in response to a new detection of a contact production of the switching element.
  • the sensor unit is provided after at least substantially 25, in particular after at least substantially 50, advantageously after at least substantially 75, particularly preferably after at least substantially 100, preferably after at least substantially 150, particularly advantageously after at least substantially 200, advantageous after at least substantially 500, in particular after at least substantially 1000 switching operations of the switching element to detect a contact production of the switching element new.
  • control unit is provided to redetermine the switching duration of the switching element when a temperature, in particular an ambient temperature and / or a temperature of the switching element, changes. It is also conceivable that the control unit is provided to redetermine the switching period of the switching element when changing a magnetic field and / or when changing an activation voltage of the switching element and / or changing an activation current of the switching element.
  • the control unit is provided for limiting the switching period of the switching element, in particular merely in FIG Distance of at least substantially 25 switching operations of the switching element to redetermine.
  • a long-life cooktop device can be achieved.
  • a regular control of the switching element can be provided, whereby a possible malfunction can be detected early.
  • control unit is provided to take into account at least one distance of the sensor unit to the switching unit when determining the switching period of the switching element.
  • control unit is provided to make at least one switching correction.
  • in the storage unit of the control unit at least one distance of the sensor unit, in particular of the sensor element, to the switching unit, in particular to a switching element of the switching unit, advantageously to all switching elements of the switching unit stored.
  • the control unit is provided to determine by means of the stored distances a period of time between a contact production of the switching element and a detection of a contact production of the switching element.
  • control unit is provided to take into account the determined time duration between a contact production of the switching element and a detection of a contact production of the switching element in a determination of the switching time of the switching element. As a result, in particular a precise determination of the switching time can be achieved.
  • control unit be provided to set at least one switch-off duration of supply electronics, which is provided in at least one operating state for supplying at least one heating element with heating element current, as a function of the switchover duration.
  • control unit is provided to deactivate the supply electronics, which is provided at least in an operating state for supplying at least one heating element with Schuelementstrom during the switching period of the switching element.
  • control unit is provided to switch the switching element in at least substantially de-energized state.
  • control unit is provided to deactivate the supply electronics in a, in particular temporally seen range of a zero crossing of a mains voltage.
  • the switch-off duration is arranged around a region of a zero crossing of the mains voltage, in particular in order to achieve low inrush currents and / or switch-off currents.
  • a durable design and / or a high electrical efficiency can be achieved.
  • a short turn-off of the power electronics can be achieved.
  • a low inrush current can be achieved.
  • Fig. 1 shows a cooktop 38 according to the invention, which is designed as an induction cooktop, with a cooktop 36 according to the invention, which is designed as an induction cooktop.
  • the cooktop 36 includes a cooktop device 10 that is formed as an induction cooktop device.
  • the hob device 10 has a base body 40 for setting up cooking utensils.
  • the main body 40 is formed as a hob plate.
  • the hob device 10 has a plurality of heating elements (not shown), which are arranged below the main body 40.
  • the heating elements, which are designed as induction heating elements, are each provided to heat cooking utensils placed on the base body 40 above the heating elements.
  • the cooktop device 10 has an operating unit 42 for operating input of operating parameters in an area assigned to an operator in the installed state.
  • the operating parameters are designed as a selection and / or modification of a heating zone and / or as an adjustment of a heating power and / or heating power density of a heating zone.
  • the operating unit 42 is provided for optically outputting a value of an operating parameter to an operator.
  • the operating unit is provided for an acoustic output of a value of an operating parameter to an operator.
  • the hob device 10 has a control unit 32, which is intended to summarize covered by the cooking utensils heating elements to a common heating zone, which is associated with the cooking utensils.
  • the control unit 32 is provided, depending on the means of the control unit 42nd entered operating parameters to perform actions and / or to change settings.
  • the hob device 10 comprises a supply electronics 34 which is provided to supply the heating elements with Walkerelementstrom.
  • the supply electronics 34 has heating frequency units (not shown) for generating the heating element current.
  • the hob device 10 has a switching unit 12 (see. Fig. 2 ).
  • the switching unit 12 is arranged on an electronic circuit board 44 of the hob device 10.
  • the switching unit 12 is equipped with seven switching elements 14, 16, 18, 20, 22, 24, 26.
  • Each switching element 14, 16, 18, 20, 22, 24, 26 is provided for a reversible switching between two switching states. In a switching operation between two switching states generates each of the switching elements 14, 16, 18, 20, 22, 24, 26, which are each designed as a relay, a switching noise.
  • the heating frequency units of the supply electronics 34, the switching elements 14, 16, 18, 20, 22, 24, 26 of the switching unit 12 and the heating elements are part of a common circuit.
  • the circuit comprising the switching unit 12 with the switching elements 14, 16, 18, 20, 22, 24, 26 is formed as an electrical, closed circuit.
  • Each switching element 14, 16, 18, 20, 22, 24, 26 interrupts in the open switching state the circuit comprising the switching unit 12.
  • Each switching element 14, 16, 18, 20, 22, 24, 26 allows, in the closed switching state, a supply of the heating elements with Bankelementstrom.
  • Each switching element 14, 16, 18, 20, 22, 24, 26 closes in the closed switching state, the circuit comprising the switching unit 12.
  • Each switching element 14, 16, 18, 20, 22, 24, 26 leads, in the closed switching state, a heating element current flowing through the circuit comprising the switching unit 12.
  • the switching elements 14, 16, 18, 20, 22, 24, 26 lead in an operating state, the Schuelementstrom.
  • the cooktop device 10 comprises a sensor unit 28 for detecting a contact production of the switching elements 14, 16, 18, 20, 22, 24, 26.
  • the sensor unit 28 is arranged on the electronic circuit board 44.
  • the sensor unit 28 is arranged at a distance from the switching unit 12.
  • a distance of the sensor unit 28 to a nearest switching element 24 of the switching unit 12 is substantially 2 cm.
  • a distance of the sensor unit 28 to a remotely located switching element 14 of the switching unit 12 is substantially 20 cm.
  • a distance of the sensor unit 28 to the other switching elements 16, 18, 20, 22, 26 of the switching unit 12 is substantially between 2 cm and 20 cm.
  • the sensor unit 28 is disposed outside of the circuit comprising the switching unit 12.
  • the sensor unit 28 is operated in an operating state of a different phase than the circuit comprising the switching unit 12. In an alternative embodiment of the invention, it is conceivable that the sensor unit is operated in an operating state of the same phase as the circuit comprising the switching unit.
  • the sensor unit 28 and the switching unit 12 are arranged electrically independently.
  • the sensor unit 28 has exactly one sensor element 30, which is provided for detecting contact production of all the switching elements 14, 16, 18, 20, 22, 24, 26 of the switching unit 12.
  • the sensor unit 28 detects a contact production of the switching elements 14, 16, 18, 20, 22, 24, 26 by means of the sensor element 30.
  • the sensor unit 28 detects a contact production of the switching elements 14, 16, 18, 20 , 22, 24, 26 offset in time.
  • the sensor unit 28 detects contact making of a first switching element 14, 16, 18, 20, 22, 24, 26.
  • a second time window spaced in time with the first time window, the sensor unit 28 detects contact making of a second switching element 14, 16, 18, 20, 22, 24, 26.
  • the sensor unit 28 For a detection of the contact-making of the switching elements 14, 16, 18, 20, 22, 24, 26, the sensor unit 28 has a microphone.
  • the sensor element 30 is designed as a microphone.
  • the sensor unit 28 detects a switching noise of the switching elements 14, 16, 18, 20, 22, 24, 26.
  • the sensor unit 28 is coupled to the switching unit 12 via sound.
  • the sensor unit 28 detects contact making of one of the switching elements 14, 16, 18, 20, 22, 24, 26 when exactly one of the switching elements 14, 16, 18, 20, 22, 24, 26 switches.
  • the control unit 32 causes a switching operation of the switching elements 14, 16, 18, 20, 22, 24, 26.
  • the control unit 32 controls a driver electronics 46, the switching elements 14, 16, 18, 20, 22, 24, 26 to a Switching action is stimulated (see. Fig. 3 ).
  • the control of a switching element 14, 16, 18, 20, 22, 24, 26 by means of the driver electronics 46 is formed as the starting point of a switching period of the switching element 14, 16, 18, 20, 22, 24, 26.
  • the control unit 32 causes a switching of one of the switching elements 14, 16, 18, 20, 22, 24, 26.
  • the control unit 32 determines a switching time window, in which a switching operation of the switching element 14, 16, 18, 20, 22, 24, 26 is to be expected.
  • the control unit 32 interprets one of the sensor element 30 signal detected within the switching time window as switching of the switching element 14, 16, 18, 20, 22, 24, 26.
  • the control unit 32 calculates a function of the detection of contact making of the switching element 14, 16, 18, 20, 22, 24, 26 a Switching time of the switching element 14, 16, 18, 20, 22, 24, 26.
  • the contact production of the switching element 14, 16, 18, 20, 22, 24, 26 is the end point of a switching period of the switching element 14, 16, 18, 20, 22nd , 24, 26 are formed.
  • the sensor unit 28 comprises a transmitting module for transmitting a switching characteristic to the control unit 32.
  • the control unit 32 comprises a receiving module for receiving switching parameters transmitted by the sensor unit 28. After a detection of a contact production of a switching element 14, 16, 18, 20, 22, 24, 26, the detected signal is converted by the sensor unit 28 into an analog signal. It is also conceivable that the sensor unit comprises an amplifier for amplifying the detected signal. In addition, the sensor unit could have a filter and / or an analog-to-digital converter. After conversion of the detected signal, the sensor unit 28 transmits the analog signal to the control unit 32.
  • the sensor unit 28 After substantially 100 switching operations of one switching element 14, 16, 18, 20, 22, 24, 26, the sensor unit 28 detects a contact production of the switching element 14, 16, 18, 20, 22, 24, 26. After substantially 100 switching operations of each switching element 14, 16, 18, 20, 22, 24, 26, the sensor unit 28 detects a contact production of the switching elements 14, 16, 18, 20, 22, 24, 26.
  • the control unit 32 determines the switching period of the switching elements 14, 16, 18, 20, 22, 24, 26 after substantially 100 switching operations of the switching elements 14, 16, 18, 20, 22, 24, 26.
  • the control unit 32 uses the newly detected by the sensor unit 28 switching characteristics, the control unit 32 has received from the sensor unit 28.
  • the control unit 32 takes into account the distance of the sensor unit 28 to the switching unit 12 when determining the switching time of the switching elements 14, 16, 18, 20, 22, 24, 26.
  • a distance of each switching element 14, 16, 18, 20, 22, 24, 26 is stored in a storage unit of the control unit 32.
  • the control unit 32 causes a switching operation of the most remote switching element 14 of the switching unit 12
  • the control unit 32 takes a distance of substantially 20 cm.
  • the control unit 32 a switching operation of the nearest switching element 24 of the switching unit 12, so the control unit 32 takes a distance of substantially 2 cm.
  • the control unit 32 defines a switch-off duration of the supply electronics 34, which is provided in an operating state for supplying the heating elements with heating element current, as a function of the switch-over duration.
  • the control unit 32 initiates a switching operation of a switching element 14, 16, 18, 20, 22, 24, 26 and calculates a switching time window in which a switching operation of the switching element 14, 16, 18, 20, 22, 24, 26 is to be expected.
  • the sensor unit 28 transmits a switching characteristic to the control unit 32.
  • the control unit 32 interprets a signal detected by the sensor element 30 within the switching time window as switching of the switching element 14, 16, 18, 20, 22, 24, 26. Subsequently, the control unit 32 activates the supply electronics 34.
  • control unit is provided to calculate, depending on the detection of a contact production of the switching element at least one pulse duration to a drive of the movable switching part of the switching element, in particular to achieve a low-noise contact production of the switching element.
  • control unit is provided to effect switching of the switching element during the pulse duration, whereupon the movable switching part is set in motion starting from a first contact point in the direction of a second contact point.
  • control unit is provided after the end of the pulse duration to interrupt a supply of the switching element with electric current, wherein the movable switching part in particular moves on because of the inertia.
  • the switching part is slowed down in a movement after interrupting the supply of the switching element with electric current by a frictional force and / or spring force.
  • the control unit is provided to set a pulse duration in order to achieve reaching the second contact point by the switching part at a speed of at least substantially 0 m / s.
  • the control unit is provided, shortly before reaching the second contact point by the movable switching element, at least one supply of the switching elements, in particular the Driver electronics, to activate a supply.
  • the control unit is provided to adjust the pulse duration in a detection of a noise by means of the sensor unit, in particular to achieve a low-noise contact production of the switching element.
  • the control unit is provided to adjust the pulse duration at standstill of the switching part before reaching the second contact point, in particular to achieve a low-noise contact production of the switching element.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electric Stoves And Ranges (AREA)
  • Electric Ovens (AREA)

Description

Die Erfindung geht aus von einer Kochmuldenvorrichtung nach dem Oberbegriff des Anspruchs 1.The invention relates to a hob device according to the preamble of claim 1.

Aus der ES 2 042 359 ist bereits eine Kochmuldenvorrichtung, und zwar eine Induktionskochmuldenvorrichtung, mit einer Schalteinheit, die ein Schaltelement umfasst, das dazu vorgesehen ist, reversibel zwischen zwei Schaltzuständen zu schalten und in einem Betriebszustand einen Heizelementstrom zu führen, und mit einer Sensoreinheit zu einer Detektion einer Kontaktherstellung des Schaltelements, vorgeschlagen worden. Hierbei ist das Schaltelement als Relais ausgebildet und die Sensoreinheit elektrisch mit dem Schaltelement verbunden, wobei die Sensoreinheit und das Schaltelement in einem gemeinsamen Schaltkreis angeordnet sind.From the ES 2 042 359 is already a Kochmuldenvorrichtung, namely a Induktionskochmuldenvorrichtung, with a switching unit comprising a switching element which is intended to switch reversibly between two switching states and in an operating state to carry a Heizelementstrom, and with a sensor unit for detecting a contact production of the switching element , has been proposed. Here, the switching element is designed as a relay and the sensor unit is electrically connected to the switching element, wherein the sensor unit and the switching element are arranged in a common circuit.

Die Aufgabe der Erfindung besteht insbesondere darin, eine gattungsgemäße Vorrichtung mit verbesserten Eigenschaften hinsichtlich einer hohen Flexibilität und/oder geringer Kosten bereitzustellen. Die Aufgabe wird erfindungsgemäß durch die Merkmale desThe object of the invention is in particular to provide a generic device with improved properties in terms of high flexibility and / or low cost. The object is achieved by the features of

Patentanspruchs 1 gelöst, während vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung den Unteransprüchen entnommen werden können. Anspruch 11 betrifft ein Verfahren zum Betrieb einer Kochmuldenvorrichtung. Die Erfindung geht aus von einer Kochmuldenvorrichtung, insbesondere einer Induktionskochmuldenvorrichtung, mit zumindest einer Schalteinheit, die zumindest ein Schaltelement umfasst, das dazu vorgesehen ist, reversibel zwischen zumindest zwei Schaltzuständen zu schalten und in zumindest einem Betriebszustand einen Heizelementstrom zu führen, insbesondere zu leiten, und mit zumindest einer Sensoreinheit zumindest zu einer Detektion einer Kontaktherstellung des Schaltelements. Es wird vorgeschlagen, dass die Sensoreinheit zumindest im Wesentlichen außerhalb zumindest eines Schaltkreises, der die Schalteinheit umfasst, angeordnet ist. Unter einem "Schaltelement" soll insbesondere ein elektrisches und/oder elektronisches Element verstanden werden, das dazu vorgesehen ist, zwischen zwei Punkten, insbesondere Kontaktstellen des Schaltelements, eine elektrisch leitende Verbindung herzustellen und/oder zu trennen. Vorzugsweise weist das Schaltelement zumindest einen Steuerkontakt auf, über den das Schaltelement geschaltet werden kann. Vorzugsweise ist das Schaltelement dazu vorgesehen, mittels des Steuerkontakts zumindest ein Steuersignal, insbesondere von zumindest einer Steuereinheit, zu empfangen und in Abhängigkeit von dem Steuersignal zumindest einen Schaltzustand zu ändern. Insbesondere ist das Schaltelement als mechanisches und/oder elektromechanisches Schaltelement ausgebildet. Vorzugsweise ist das Schaltelement als elektromagnetisches Schaltelement, insbesondere als Relais, ausgebildet. Insbesondere umfasst das Schaltelement zumindest ein Schaltteil, das dazu vorgesehen ist, bei einem Schaltvorgang des Schaltelements reversibel eine Verbindung zwischen zumindest einer ersten Kontaktstelle und zumindest einer zweiten Kontaktstelle herzustellen und/oder zu unterbrechen. Insbesondere ist das Schaltteil zumindest im Wesentlichen fest an der ersten Kontaktstelle angeordnet. Insbesondere ist die erste Kontaktstelle als Festkontakt ausgebildet. Insbesondere ist die zweite Kontaktstelle als Wechselkontakt ausgebildet. Insbesondere ist das Schaltteil dazu vorgesehen, in einem ersten Schaltzustand des Schaltelements eine Verbindung zwischen der ersten Kontaktstelle und der zweiten Kontaktstelle herzustellen. Insbesondere ist das Schaltteil dazu vorgesehen, in einem zweiten Schaltzustand des Schaltelements eine Verbindung zwischen der ersten Kontaktstelle und der zweiten Kontaktstelle zu trennen und/oder eine Verbindung zwischen der ersten Kontaktstelle und zumindest einer dritten Kontaktstelle herzustellen. Insbesondere ist die dritte Kontaktstelle als Wechselkontakt ausgebildet. Insbesondere sind die Kontaktstellen als Leistungskontakte ausgebildet. Insbesondere ist das Schaltteil als Anker ausgebildet. Insbesondere ist das Schaltteil dazu vorgesehen, durch zumindest eine elektrische und/oder magnetische Antriebskraft in Bewegung versetzt zu werden. Insbesondere umfasst die Schalteinheit zumindest 2, insbesondere zumindest 4, vorteilhaft zumindest 6, besonders vorteilhaft zumindest 8 Schaltelemente. Insbesondere umfasst die Schalteinheit höchstens 80, insbesondere höchstens 60, vorteilhaft höchstens 40, besonders vorteilhaft höchstens 20, vorzugsweise höchstens 10 Schaltelemente. Unter der Wendung, dass das Schaltelement dazu vorgesehen ist, "reversibel" zwischen zumindest zwei Schaltzuständen zu schalten, soll insbesondere verstanden werden, dass das Schaltelement dazu vorgesehen ist, zumindest zu einer ersten Zeit von einem ersten Schaltzustand in einen zweiten Schaltzustand zu schalten und zu einer zweiten Zeit, die insbesondere zeitlich zu der ersten Zeit beabstandet ist, von dem zweiten Schaltzustand in den ersten Schaltzustand zu schalten. Insbesondere ist ein Schaltvorgang des Schaltelements umkehrbar, vorteilhaft beliebig oft ausführbar, insbesondere wiederholbar. Unter einem "Heizelementstrom" soll insbesondere elektrischer Strom zumindest zu einem Betreiben und/oder zu einer Versorgung zumindest eines Heizelements verstanden werden. Insbesondere umfasst die Kochmuldenvorrichtung zumindest eine Versorgungselektronik zumindest zu einer Erzeugung des Heizelementstroms. Insbesondere umfasst die Versorgungselektronik zumindest eine Heizfrequenzeinheit zumindest zu einer Erzeugung von Heizelementstrom zu einem Betreiben und/oder zu einer Versorgung zumindest eines Heizelements. Insbesondere umfasst die Kochmuldenvorrichtung zumindest ein Heizelement zu einem Erhitzen von aufgestelltem Gargeschirr. Insbesondere umfasst die Kochmuldenvorrichtung zumindest eine Steuereinheit zumindest zu einer Steuerung der Versorgungselektronik und/oder des Heizelements und/oder der Schalteinheit. Unter einer "Steuereinheit" soll insbesondere eine elektronische Einheit verstanden werden, die vorzugsweise in einer Steuer- und/oder Regeleinheit einer Kochmulde zumindest teilweise integriert ist und die vorzugsweise dazu vorgesehen ist, zumindest die Versorgungselektronik zu steuern und/oder zu regeln. Vorzugsweise umfasst die Steuereinheit eine Recheneinheit und insbesondere zusätzlich zur Recheneinheit eine Speichereinheit mit einem darin gespeicherten Steuer- und/oder Regelprogramm, das dazu vorgesehen ist, von der Recheneinheit ausgeführt zu werden. Insbesondere umfasst die Steuereinheit zumindest eine Treiberelektronik zumindest zu einer Erzeugung eines Steuersignals zu einem Schalten des Schaltelements. Insbesondere ist die Steuereinheit dazu vorgesehen, zu einem Betreiben des Heizelements die Versorgungselektronik anzusteuern, um insbesondere den Heizelementstrom zu erzeugen. Insbesondere ist die Steuereinheit dazu vorgesehen, zumindest einen Schaltvorgang des Schaltelements zu bewirken. Unter der Wendung, dass die Steuereinheit dazu vorgesehen ist, zumindest einen Schaltvorgang des Schaltelements zu "bewirken", soll insbesondere verstanden werden, dass die Steuereinheit dazu vorgesehen ist, zumindest ein Steuersignal an das Schaltelement, insbesondere an den Steuerkontakt des Schaltelements, zu übertragen, um das Schaltelement zu einem Schaltvorgang anzuregen, insbesondere das Schaltteil des Schaltelements in Bewegung zu versetzen. Insbesondere sind die Heizfrequenzeinheit, die Schalteinheit, insbesondere mit dem Schaltelement, und das Heizelement Teil eines gemeinsamen, insbesondere elektrischen, vorteilhaft geschlossenen Schaltkreises. Insbesondere ist das Schaltelement dazu vorgesehen, in Abhängigkeit von einem Schaltzustand eine Versorgung des Heizelements mit Heizelementstrom zu ermöglichen und/oder zu blockieren. Insbesondere ist das Schaltelement dazu vorgesehen, in geöffnetem Schaltzustand eine Versorgung des Heizelements mit Heizelementstrom zu blockieren. Insbesondere ist das Schaltelement dazu vorgesehen, in geöffnetem Schaltzustand den Schaltkreis, der die Schalteinheit umfasst, zu unterbrechen. Insbesondere ist das Schaltelement dazu vorgesehen, in geschlossenem Schaltzustand eine Versorgung des Heizelements mit Heizelementstrom zu ermöglichen. Insbesondere ist das Schaltelement dazu vorgesehen, in geschlossenem Schaltzustand den Schaltkreis, der die Schalteinheit umfasst, zu schließen. Insbesondere ist das Schaltelement dazu vorgesehen, in geschlossenem Schaltzustand einen durch den Schaltkreis, der die Schalteinheit umfasst, fließenden Heizelementstrom zu führen, insbesondere zu leiten. Unter einer "Sensoreinheit" soll insbesondere eine Einheit mit zumindest einem Sensorelement verstanden werden, das dazu vorgesehen ist, zu einer Detektion einer Kontaktherstellung des Schaltelements zumindest eine Kenngröße zu messen und/oder zu detektieren und/oder zu erfassen. Vorzugsweise weist die Sensoreinheit zumindest ein Mikrofon auf, das zu einer Detektion einer Kontaktherstellung des Schaltelements vorgesehen ist. Insbesondere ist die Kenngröße als akustische Kenngröße ausgebildet. Zusätzlich ist denkbar, dass die Sensoreinheit dazu vorgesehen ist, zumindest eine Anzahl an Aufprallen des Schaltteils auf eine der Kontaktstellen zu detektieren. Weiterhin ist denkbar, dass die Sensoreinheit dazu vorgesehen ist, zumindest eine akustische Energie einer Kontaktherstellung des Schaltelements zu detektieren. Ebenfalls denkbar ist, dass die Sensoreinheit zumindest einen Zeitsensor aufweist, der dazu vorgesehen ist, zumindest eine Dauer eines Prellvorgangs des Schaltteils auf eine der Kontaktstellen zu detektieren. Unter einem "Mikrofon" soll insbesondere ein Element verstanden werden, das dazu vorgesehen ist, zumindest in einem Betriebszustand zumindest ein akustisches Signal, insbesondere eine Schallwelle, vorteilhaft eine Schalldruckwelle, in zumindest ein elektrisches Signal, insbesondere in zumindest eine elektrische Spannung, zu konvertieren, insbesondere umzuwandeln. Insbesondere ist das Mikrofon dazu vorgesehen, zumindest in einem Betriebszustand akustische Signale aus einem Frequenzbereich zwischen 100 Hz und 16000 Hz zu detektieren. Insbesondere umfasst die Kochmuldenvorrichtung, vorteilhaft zusätzlich zu der Sensoreinheit zu einer Detektion der Kontaktherstellung des Schaltelements, zumindest eine weitere Sensoreinheit, die zumindest zu einer Detektion eines elektrischen Parameters des Schaltkreises, der die Schalteinheit umfasst, vorgesehen ist. Beispielsweise ist der elektrische Parameter als elektrische Spannung und/oder als elektrische Stromstärke und/oder als Frequenz eines elektrischen Stroms und/oder als Widerstand ausgebildet. Alternativ sind weitere, einem Fachmann als sinnvoll erscheinende Parameter denkbar. In einer alternativen Ausgestaltung der Erfindung könnte die Sensoreinheit einen Beschleunigungssensor umfassen, der dazu vorgesehen sein könnte, zu einer Detektion einer Kontaktherstellung des Schaltelements eine Beschleunigung des Schaltteils zu detektieren. Ebenfalls denkbar ist, dass die Sensoreinheit dazu vorgesehen ist, zu einer Detektion einer Kontaktherstellung des Schaltelements eine Position und/oder eine Bewegung des Schaltteils mittels eines Lichtstrahls, insbesondere eines Laserstrahls, zu detektieren. Insbesondere wäre hierbei die Kenngröße als optische Kenngröße ausgebildet. Zudem ist denkbar, dass die Sensoreinheit zu einer Detektion einer Kontaktherstellung des Schaltelements einen mehrpoligen Umschalter zu einer Messung eines Schaltzustands des Schaltelements umfasst. Insbesondere ist hierbei denkbar, dass die Sensoreinheit ein weiteres Schaltelement umfasst, dessen Schaltteil mechanisch mit dem Schaltteil des Schaltelements verbunden ist, um dadurch die Messung eines Schaltzustands des Schaltelements zu ermöglichen. Unter der Wendung, dass die Sensoreinheit zumindest im Wesentlichen "außerhalb" zumindest eines Schaltkreises, der die Schalteinheit umfasst, angeordnet ist, soll insbesondere verstanden werden, dass die Sensoreinheit und die Schalteinheit elektrisch unabhängig angeordnet sind. Insbesondere sind die Sensoreinheit und die Schalteinheit zumindest im Wesentlichen elektrisch voneinander isoliert. Erfindungsgemäß sind die Sensoreinheit und die Schalteinheit zumindest im Wesentlichen elektrisch wechselwirkungsfrei zueinander angeordnet. Insbesondere sind die Sensoreinheit und die Schalteinheit zumindest in einem Betriebszustand lediglich über akustische Signale, insbesondere über Schallwellen gekoppelt. Vorteilhaft sind die Sensoreinheit und die Schalteinheit zumindest in einem Betriebszustand von verschiedenen Spannungswandlern versorgt. Vorteilhaft sind die Sensoreinheit und die Schalteinheit zumindest in einem Betriebszustand von verschiedenen Phasen betrieben. Alternativ ist denkbar, dass die Sensoreinheit und die Schalteinheit zumindest in einem Betriebszustand von einer einzigen, gemeinsamen Phase betrieben sind. Insbesondere ist die Sensoreinheit dazu vorgesehen, die Kontaktherstellung des Schaltelements zumindest im Wesentlichen unabhängig von einem durch das Schaltelement fließenden Strom zu detektieren. Insbesondere sind die Sensoreinheit und die Schalteinheit beabstandet zueinander angeordnet. Insbesondere weisen die Sensoreinheit und die Schalteinheit einen Abstand von zumindest 2 cm, insbesondere von zumindest 4 cm, vorteilhaft von zumindest 5 cm auf. Insbesondere weisen die Sensoreinheit und die Schalteinheit einen Abstand von höchstens 50 cm, insbesondere von höchstens 30 cm, vorteilhaft von höchstens 20 cm auf. Unter "vorgesehen" soll insbesondere speziell programmiert, ausgelegt und/oder ausgestattet verstanden werden. Darunter, dass ein Objekt zu einer bestimmten Funktion vorgesehen ist, soll insbesondere verstanden werden, dass das Objekt diese bestimmte Funktion in zumindest einem Anwendungs- und/oder Betriebszustand erfüllt und/oder ausführt.Patent claim 1 solved, while advantageous embodiments and modifications of the invention can be taken from the dependent claims. Claim 11 relates to a method for operating a hob device. The invention is based on a cooktop device, in particular an induction cooktop device, with at least one switching unit which comprises at least one switching element which is intended to switch reversibly between at least two switching states and to guide, in particular conduct, a heating element current in at least one operating state, and with at least one sensor unit at least for a detection of a contact production of the switching element. It is proposed that the sensor unit is arranged at least substantially outside at least one circuit which comprises the switching unit. A "switching element" is to be understood in particular an electrical and / or electronic element which is provided to produce and / or to separate an electrically conductive connection between two points, in particular contact points of the switching element. Preferably, the switching element has at least one control contact, via which the switching element can be switched. Preferably the switching element is provided to receive by means of the control contact at least one control signal, in particular of at least one control unit, and to change at least one switching state as a function of the control signal. In particular, the switching element is designed as a mechanical and / or electromechanical switching element. Preferably, the switching element is designed as an electromagnetic switching element, in particular as a relay. In particular, the switching element comprises at least one switching part which is provided to reversibly establish and / or interrupt a connection between at least one first contact point and at least one second contact point during a switching operation of the switching element. In particular, the switching part is at least substantially fixedly arranged at the first contact point. In particular, the first contact point is designed as a fixed contact. In particular, the second contact point is designed as a changeover contact. In particular, the switching part is provided to establish a connection between the first contact point and the second contact point in a first switching state of the switching element. In particular, the switching part is provided to disconnect a connection between the first contact point and the second contact point in a second switching state of the switching element and / or to establish a connection between the first contact point and at least one third contact point. In particular, the third contact point is designed as a changeover contact. In particular, the contact points are designed as power contacts. In particular, the switching part is designed as an anchor. In particular, the switching part is intended to be set in motion by at least one electrical and / or magnetic driving force. In particular, the switching unit comprises at least 2, in particular at least 4, advantageously at least 6, particularly advantageously at least 8 switching elements. In particular, the switching unit comprises at most 80, in particular at most 60, advantageously at most 40, particularly advantageously at most 20, preferably at most 10 switching elements. Under the phrase that the switching element is intended to "reversibly" to switch between at least two switching states, should be understood in particular that the switching element is intended to switch at least for a first time from a first switching state to a second switching state and to a second time, which is in particular temporally spaced at the first time to switch from the second switching state to the first switching state. In particular, a switching operation of the switching element is reversible, advantageously as often executable, in particular repeatable. Under a "Heizelementstrom" in particular electrical current to at least an operation and / or to supply at least one heating element to be understood. In particular, the cooktop device comprises at least one supply electronics at least for generating the Heizelementstroms. In particular, the supply electronics comprises at least one heating frequency unit at least for generating heating element current for operating and / or for supplying at least one heating element. In particular, the cooktop device comprises at least one heating element for heating up cooking utensils. In particular, the cooktop device comprises at least one control unit at least for controlling the supply electronics and / or the heating element and / or the switching unit. A "control unit" should in particular be understood to mean an electronic unit which is preferably at least partially integrated in a control and / or regulating unit of a cooktop and which is preferably provided to control and / or regulate at least the supply electronics. The control unit preferably 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, which is intended to be executed by the computing unit. In particular, the control unit comprises at least one driver electronics at least for generating a control signal for switching the switching element. In particular, the control unit is provided to control the supply electronics for operating the heating element, in order in particular to generate the heating element current. In particular, the control unit is provided to effect at least one switching operation of the switching element. By the use of the control unit being intended to "effect" at least one switching operation of the switching element, it should be understood in particular that the control unit is intended to transmit at least one control signal to the switching element, in particular to the control contact of the switching element, to stimulate the switching element to a switching operation, in particular to put the switching part of the switching element in motion. In particular, the heating frequency unit, the switching unit, in particular with the switching element, and the heating element are part of a common, in particular electrical, advantageously closed circuit. In particular, the switching element is provided to enable and / or block supply of the heating element with heating element current as a function of a switching state. In particular, the switching element is provided to supply the heating element with Heizelementstrom in the open switching state To block. In particular, the switching element is provided to interrupt the circuit comprising the switching unit in the open switching state. In particular, the switching element is provided to allow a supply of the heating element with Heizelementstrom in the closed switching state. In particular, the switching element is provided to close in the closed switching state, the circuit comprising the switching unit. In particular, the switching element is provided, in the closed switching state, to lead, in particular to conduct, a heating element current flowing through the circuit comprising the switching unit. A "sensor unit" is to be understood in particular as meaning a unit having at least one sensor element which is provided to measure and / or detect and / or detect at least one parameter for detection of a contact production of the switching element. Preferably, the sensor unit has at least one microphone which is provided for a detection of a contact production of the switching element. In particular, the parameter is designed as an acoustic characteristic. In addition, it is conceivable that the sensor unit is provided to detect at least a number of impacts of the switching part on one of the contact points. Furthermore, it is conceivable that the sensor unit is provided to detect at least one acoustic energy of a contact production of the switching element. It is also conceivable that the sensor unit has at least one time sensor which is provided to detect at least one duration of a bouncing process of the switching part on one of the contact points. A "microphone" is to be understood in particular as an element which is intended to convert at least one acoustic signal, in particular a sound wave, advantageously a sound pressure wave, into at least one electrical signal, in particular at least one electrical voltage, at least in one operating state, in particular to transform. In particular, the microphone is intended to detect acoustic signals from a frequency range between 100 Hz and 16000 Hz, at least in one operating state. In particular, the cooktop device, advantageously in addition to the sensor unit for detecting the contact production of the switching element, comprises at least one further sensor unit, which is provided at least for a detection of an electrical parameter of the circuit comprising the switching unit. For example, the electrical parameter is designed as an electrical voltage and / or as an electrical current strength and / or as a frequency of an electrical current and / or as a resistance. Alternatively, further parameters that appear appropriate to a person skilled in the art are conceivable. In According to an alternative embodiment of the invention, the sensor unit could comprise an acceleration sensor, which could be provided to detect an acceleration of the switching part for detecting a contact-making of the switching element. It is also conceivable that the sensor unit is provided for detecting a position and / or a movement of the switching part by means of a light beam, in particular a laser beam, for a detection of a contact production of the switching element. In particular, in this case the characteristic would be designed as an optical characteristic. In addition, it is conceivable for the sensor unit to comprise a multi-pole change-over switch for a detection of a contact production of the switching element to a measurement of a switching state of the switching element. In particular, it is conceivable that the sensor unit comprises a further switching element whose switching part is mechanically connected to the switching part of the switching element, thereby to enable the measurement of a switching state of the switching element. By the use of the sensor unit being arranged at least substantially "outside" of at least one circuit comprising the switching unit, it should be understood in particular that the sensor unit and the switching unit are arranged electrically independently. In particular, the sensor unit and the switching unit are at least substantially electrically isolated from each other. According to the invention, the sensor unit and the switching unit are arranged at least substantially without electrical interaction with each other. In particular, the sensor unit and the switching unit are coupled at least in an operating state only via acoustic signals, in particular via sound waves. Advantageously, the sensor unit and the switching unit are supplied at least in an operating state of different voltage transformers. Advantageously, the sensor unit and the switching unit are operated at least in an operating state of different phases. Alternatively, it is conceivable that the sensor unit and the switching unit are operated at least in an operating state of a single, common phase. In particular, the sensor unit is provided to detect the contact production of the switching element at least substantially independently of a current flowing through the switching element current. In particular, the sensor unit and the switching unit are arranged at a distance from one another. In particular, the sensor unit and the switching unit have a distance of at least 2 cm, in particular of at least 4 cm, advantageously of at least 5 cm. In particular, the sensor unit and the switching unit have a distance of at most 50 cm, in particular of at most 30 cm, advantageously of at most 20 cm. By "provided" is meant to be specific in particular programmed, designed and / or equipped to be understood. The fact that an object is intended for a specific function should in particular mean that the object fulfills and / or executes this specific function in at least one application and / or operating state.

Durch die erfindungsgemäße Ausgestaltung kann insbesondere eine hohe Flexibilität und/oder geringe Kosten erreicht werden. Insbesondere kann die Kontaktherstellung des Schaltelements sicher und/oder präzise detektiert werden. Vorteilhaft kann die Kontaktherstellung des Schaltelements drahtlos, insbesondere unter Vermeidung einer direkten elektrischen Verbindung zwischen der Schalteinheit und der Sensoreinheit, detektiert werden. Vorteilhaft kann eine Funktionsfähigkeit des Schaltelements überwacht werden. Insbesondere können mögliche Fehlfunktionen frühzeitig erkannt werden. Insbesondere kann eine langlebige Ausgestaltung erreicht werden.The inventive design can be achieved in particular a high flexibility and / or low cost. In particular, the contact production of the switching element can be detected safely and / or precisely. Advantageously, the contact production of the switching element can be detected wirelessly, in particular while avoiding a direct electrical connection between the switching unit and the sensor unit. Advantageously, a functionality of the switching element can be monitored. In particular, possible malfunctions can be detected early. In particular, a durable design can be achieved.

Weiterhin wird vorgeschlagen, dass die Sensoreinheit zumindest ein, insbesondere genau ein Sensorelement aufweist, das zumindest zu einer Detektion einer Kontaktherstellung von zumindest zwei, insbesondere von zumindest vier, vorteilhaft von zumindest sechs, besonders vorteilhaft von allen Schaltelementen der Schalteinheit vorgesehen ist. Insbesondere ist die Steuereinheit dazu vorgesehen, ein erstes Schaltelement der Schalteinheit zu einer anderen Zeit zu schalten als ein zweites Schaltelement der Schalteinheit, insbesondere um eine Überlagerung von Schaltgeräuschen zu vermeiden und/oder eine präzise Messung einer Kontaktherstellung des Schaltelements zu ermöglichen. Vorzugsweise ist die Steuereinheit dazu vorgesehen, eine Detektion einer Kontaktherstellung eines Schaltelements zu einer Zeit vorzunehmen, die zu einer Zeit weiterer Kontaktherstellungen weiterer Schaltelemente beabstandet ausgebildet ist. Insbesondere ist die Steuereinheit dazu vorgesehen, insbesondere vor einer Aktivierung des Schaltelements, vorteilhaft vor einer Kontaktherstellung des Schaltelements, eine Kontaktherstellung des Schaltelements zu prognostizieren. Insbesondere ist die Steuereinheit dazu vorgesehen, zumindest ein Schaltzeitfenster, in welchem ein Schaltvorgang eines Schaltelements zu erwarten ist, zu ermitteln. Insbesondere ist die Steuereinheit dazu vorgesehen, ein von dem Sensorelement innerhalb des Schaltzeitfensters detektiertes Signal als Schalten des Schaltelements zu interpretieren. Insbesondere ist die Steuereinheit dazu vorgesehen, ein von dem Sensorelement detektiertes Signal dem Schaltelement zuzuordnen, falls das von dem Sensorelement detektierte Signal innerhalb des Schaltzeitfensters angeordnet ist. Insbesondere ist die Steuereinheit dazu vorgesehen, innerhalb des Schaltzeitfensters genau einen Schaltvorgang genau eines Schaltelements zu bewirken. Insbesondere ist die Steuereinheit dazu vorgesehen, bei einem Schaltvorgang von zumindest zwei Schaltelementen innerhalb des Schaltzeitfensters eine Auswertung von durch das Sensorelement detektierten Signalen zu unterlassen. Dadurch kann insbesondere eine kostengünstige und/oder flexible Ausgestaltung erreicht werden. Insbesondere kann eine geringe Anzahl an Sensorelementen erreicht werden. Insbesondere kann mittels eines einzigen Sensorelements eine Kontaktherstellung mehrerer Schaltelemente detektiert werden.Furthermore, it is proposed that the sensor unit has at least one, in particular exactly one sensor element which is provided at least for a detection of a contact production of at least two, in particular of at least four, advantageously of at least six, particularly advantageous of all switching elements of the switching unit. In particular, the control unit is provided to switch a first switching element of the switching unit at a different time than a second switching element of the switching unit, in particular to avoid a superposition of switching noise and / or to enable a precise measurement of a contact production of the switching element. Preferably, the control unit is provided to carry out a detection of a contact production of a switching element at a time, which is formed spaced at a time of further contact production of other switching elements. In particular, the control unit is provided, in particular before an activation of the switching element, advantageously before a contact preparation of the switching element, to predict a contact production of the switching element. In particular, the control unit is provided to determine at least one switching time window in which a switching operation of a switching element is to be expected. In particular, the control unit is provided for interpreting a signal detected by the sensor element within the switching time window as switching of the switching element. In particular, the control unit is provided to assign a signal detected by the sensor element to the switching element, if that of the sensor element detected signal is arranged within the switching time window. In particular, the control unit is provided to effect exactly one switching operation of exactly one switching element within the switching time window. In particular, the control unit is provided to refrain from evaluating signals detected by the sensor element during a switching operation of at least two switching elements within the switching time window. As a result, in particular a cost-effective and / or flexible design can be achieved. In particular, a small number of sensor elements can be achieved. In particular, by means of a single sensor element, a contact production of a plurality of switching elements can be detected.

Zudem wird vorgeschlagen, dass die Kochmuldenvorrichtung zumindest eine Steuereinheit umfasst, die dazu vorgesehen ist, in Abhängigkeit von der Detektion einer Kontaktherstellung des Schaltelements zumindest eine Umschaltdauer des Schaltelements zu berechnen. Insbesondere ist die Umschaltdauer als eine Zeitspanne ausgebildet, die das Schaltelement von einer Aktivierung an bis zu einer Kontaktherstellung benötigt. Insbesondere ist die Umschaltdauer als eine Zeitspanne ausgebildet, die das Schaltteil zu einer Bewegung von der ersten Kontaktstelle zu der zweiten Kontaktstelle benötigt. Insbesondere befindet sich das Schaltteil während der Umschaltdauer in Bewegung. Insbesondere umfasst die Sensoreinheit zumindest ein Sendemodul zu einer Übertragung einer Schaltkenngröße an die Steuereinheit. Insbesondere umfasst die Steuereinheit zumindest ein Empfangsmodul zu einem Empfang von der Sensoreinheit übermittelter Schaltkenngrößen. Dadurch kann insbesondere eine Kontaktherstellung des Schaltelements zu einer gewünschten Zeit erfolgen.In addition, it is proposed that the cooktop device comprises at least one control unit which is provided to calculate at least one switchover duration of the switching element as a function of the detection of a contact production of the switching element. In particular, the switching period is formed as a period of time that the switching element requires from activation to contact making. In particular, the switching period is formed as a period of time that the switching part needs to move from the first contact point to the second contact point. In particular, the switching part is in motion during the switching period. In particular, the sensor unit comprises at least one transmission module for transmitting a switching characteristic to the control unit. In particular, the control unit comprises at least one receiving module for receiving switching parameters transmitted by the sensor unit. This can be done in particular a contact of the switching element at a desired time.

Weiterhin wird vorgeschlagen, dass die Steuereinheit dazu vorgesehen ist, die Umschaltdauer des Schaltelements nach zumindest im Wesentlichen 25, insbesondere nach zumindest im Wesentlichen 50, vorteilhaft nach zumindest im Wesentlichen 75, besonders bevorzugt nach zumindest im Wesentlichen 100, bevorzugt nach zumindest im Wesentlichen 150, besonders vorteilhaft nach zumindest im Wesentlichen 200, vorteilhaft nach zumindest im Wesentlichen 500, insbesondere nach zumindest im Wesentlichen 1000 Schaltvorgängen des Schaltelements neu zu ermitteln. Insbesondere ist die Steuereinheit dazu vorgesehen, die Umschaltdauer des Schaltelements nach zumindest im Wesentlichen 25, insbesondere nach zumindest im Wesentlichen 50, vorteilhaft nach zumindest im Wesentlichen 75, besonders bevorzugt nach zumindest im Wesentlichen 100, bevorzugt nach zumindest im Wesentlichen 150, besonders vorteilhaft nach zumindest im Wesentlichen 200, vorteilhaft nach zumindest im Wesentlichen 500, insbesondere nach zumindest im Wesentlichen 1000 Schaltvorgängen des Schaltelements in Abhängigkeit einer neuen Detektion einer Kontaktherstellung des Schaltelements neu zu ermitteln. Insbesondere ist die Sensoreinheit dazu vorgesehen, nach zumindest im Wesentlichen 25, insbesondere nach zumindest im Wesentlichen 50, vorteilhaft nach zumindest im Wesentlichen 75, besonders bevorzugt nach zumindest im Wesentlichen 100, bevorzugt nach zumindest im Wesentlichen 150, besonders vorteilhaft nach zumindest im Wesentlichen 200, vorteilhaft nach zumindest im Wesentlichen 500, insbesondere nach zumindest im Wesentlichen 1000 Schaltvorgängen des Schaltelements eine Kontaktherstellung des Schaltelements neu zu detektieren. Alternativ oder zusätzlich ist denkbar, dass die Steuereinheit dazu vorgesehen ist, die Umschaltdauer des Schaltelements bei Änderung einer Temperatur, insbesondere einer Umgebungstemperatur und/oder einer Temperatur des Schaltelements, neu zu ermitteln. Ebenfalls denkbar ist, dass die Steuereinheit dazu vorgesehen ist, die Umschaltdauer des Schaltelements bei Änderung eines Magnetfelds und/oder bei Änderung einer Aktivierungsspannung des Schaltelements und/oder bei Änderung eines Aktivierungsstroms des Schaltelements neu zu ermitteln. Unter der Wendung, dass die Steuereinheit dazu vorgesehen ist, die Umschaltdauer des Schaltelements "nach" zumindest im Wesentlichen 25 Schaltvorgängen des Schaltelements neu zu ermitteln, soll insbesondere verstanden werden, dass die Steuereinheit dazu vorgesehen ist, die Umschaltdauer des Schaltelements, insbesondere lediglich, im Abstand von zumindest im Wesentlichen 25 Schaltvorgängen des Schaltelements neu zu ermitteln. Dadurch kann insbesondere eine langlebige Kochmuldenvorrichtung erreicht werden. Insbesondere kann eine regelmäßige Kontrolle des Schaltelements bereitgestellt werden, wodurch eine mögliche Fehlfunktion früh erkannt werden kann.Furthermore, it is proposed that the control unit be provided for the switching period of the switching element after at least substantially 25, in particular after at least substantially 50, advantageously after at least substantially 75, more preferably after at least substantially 100, preferably after at least substantially 150, Particularly advantageously after at least substantially 200, advantageously after at least substantially 500, in particular after at least substantially 1000 switching operations of the switching element to redetermine. In particular, the control unit is provided to the switching period of the switching element according to at least substantially, in particular after at least substantially 50, advantageously after at least substantially 75, particularly preferably after at least substantially 100, preferably after at least substantially 150, particularly advantageously after at least substantially 200, advantageously after at least substantially 500, in particular after at least substantially new 1000 switching operations of the switching element in response to a new detection of a contact production of the switching element. In particular, the sensor unit is provided after at least substantially 25, in particular after at least substantially 50, advantageously after at least substantially 75, particularly preferably after at least substantially 100, preferably after at least substantially 150, particularly advantageously after at least substantially 200, advantageous after at least substantially 500, in particular after at least substantially 1000 switching operations of the switching element to detect a contact production of the switching element new. Alternatively or additionally, it is conceivable that the control unit is provided to redetermine the switching duration of the switching element when a temperature, in particular an ambient temperature and / or a temperature of the switching element, changes. It is also conceivable that the control unit is provided to redetermine the switching period of the switching element when changing a magnetic field and / or when changing an activation voltage of the switching element and / or changing an activation current of the switching element. By the use of the control unit being intended to newly determine the switching period of the switching element "after" at least substantially 25 switching operations of the switching element, it should be understood in particular that the control unit is provided for limiting the switching period of the switching element, in particular merely in FIG Distance of at least substantially 25 switching operations of the switching element to redetermine. As a result, in particular, a long-life cooktop device can be achieved. In particular, a regular control of the switching element can be provided, whereby a possible malfunction can be detected early.

Ferner wird vorgeschlagen, dass die Steuereinheit dazu vorgesehen ist, bei einer Ermittlung der Umschaltdauer des Schaltelements zumindest einen Abstand der Sensoreinheit zu der Schalteinheit zu berücksichtigen. Insbesondere ist die Steuereinheit dazu vorgesehen, zumindest eine Schaltkorrektur vorzunehmen. Insbesondere ist in der Speichereinheit der Steuereinheit zumindest ein Abstand der Sensoreinheit, insbesondere des Sensorelements, zu der Schalteinheit, insbesondere zu einem Schaltelement der Schalteinheit, vorteilhaft zu allen Schaltelementen der Schalteinheit, gespeichert. Insbesondere ist die Steuereinheit dazu vorgesehen, mittels der gespeicherten Abstände eine Zeitdauer zwischen einer Kontaktherstellung des Schaltelements und einer Detektion einer Kontaktherstellung des Schaltelements zu ermitteln. Insbesondere ist die Steuereinheit dazu vorgesehen, die ermittelte Zeitdauer zwischen einer Kontaktherstellung des Schaltelements und einer Detektion einer Kontaktherstellung des Schaltelements bei einer Ermittlung der Umschaltdauer des Schaltelements zu berücksichtigen. Dadurch kann insbesondere eine präzise Ermittlung der Umschaltdauer erreicht werden.It is also proposed that the control unit is provided to take into account at least one distance of the sensor unit to the switching unit when determining the switching period of the switching element. In particular, the control unit is provided to make at least one switching correction. In particular, in the storage unit of the control unit at least one distance of the sensor unit, in particular of the sensor element, to the switching unit, in particular to a switching element of the switching unit, advantageously to all switching elements of the switching unit stored. In particular, the control unit is provided to determine by means of the stored distances a period of time between a contact production of the switching element and a detection of a contact production of the switching element. In particular, the control unit is provided to take into account the determined time duration between a contact production of the switching element and a detection of a contact production of the switching element in a determination of the switching time of the switching element. As a result, in particular a precise determination of the switching time can be achieved.

Zudem wird vorgeschlagen, dass die Steuereinheit dazu vorgesehen ist, in Abhängigkeit von der Umschaltdauer zumindest eine Ausschaltdauer einer Versorgungselektronik, die in zumindest einem Betriebszustand zu einer Versorgung zumindest eines Heizelements mit Heizelementstrom vorgesehen ist, festzulegen. Insbesondere ist die Steuereinheit dazu vorgesehen, die Versorgungselektronik, die zumindest in einem Betriebszustand zu einer Versorgung zumindest eines Heizelements mit Heizelementstrom vorgesehen ist, während der Umschaltdauer des Schaltelements zu deaktivieren. Insbesondere ist die Steuereinheit dazu vorgesehen, das Schaltelement in zumindest im Wesentlichen stromlosen Zustand zu schalten. Insbesondere ist die Steuereinheit dazu vorgesehen, die Versorgungselektronik in einem, insbesondere zeitlich gesehen Bereich eines Nulldurchgangs einer Netzspannung zu deaktivieren. Insbesondere ist die Ausschaltdauer um einen Bereich eines Nulldurchgangs der Netzspannung angeordnet, insbesondere um geringe Einschaltströme und/oder Ausschaltströme zu erreichen. Dadurch kann insbesondere eine langlebige Ausgestaltung und/oder eine hohe elektrische Effizienz erreicht werden. Vorteilhaft kann eine kurze Ausschaltdauer der Versorgungselektronik erreicht werden. Zudem kann vorteilhaft ein geringer Einschaltstrom erreicht werden.In addition, it is proposed that the control unit be provided to set at least one switch-off duration of supply electronics, which is provided in at least one operating state for supplying at least one heating element with heating element current, as a function of the switchover duration. In particular, the control unit is provided to deactivate the supply electronics, which is provided at least in an operating state for supplying at least one heating element with Heizelementstrom during the switching period of the switching element. In particular, the control unit is provided to switch the switching element in at least substantially de-energized state. In particular, the control unit is provided to deactivate the supply electronics in a, in particular temporally seen range of a zero crossing of a mains voltage. In particular, the switch-off duration is arranged around a region of a zero crossing of the mains voltage, in particular in order to achieve low inrush currents and / or switch-off currents. As a result, in particular a durable design and / or a high electrical efficiency can be achieved. Advantageously, a short turn-off of the power electronics can be achieved. In addition, advantageously, a low inrush current can be achieved.

Weitere Vorteile ergeben sich aus der folgenden Zeichnungsbeschreibung. In der Zeichnung sind Ausführungsbeispiele der Erfindung dargestellt. Die Zeichnung, die Beschreibung und die Ansprüche enthalten zahlreiche Merkmale in Kombination. Der Fachmann wird die Merkmale zweckmäßigerweise auch einzeln betrachten und zu sinnvollen weiteren Kombinationen zusammenfassen.Further advantages emerge from the following description of the drawing. In the drawings, embodiments of the invention are shown. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.

Es zeigen:

Fig. 1
ein erfindungsgemäßes Kochfeld mit einer erfindungsgemäßen Kochmulde, die eine erfindungsgemäße Kochmuldenvorrichtung umfasst, in einer schematischen Draufsicht,
Fig. 2
einen Ausschnitt der erfindungsgemäßen Kochmulde der erfindungsgemäßen Kochmuldenvorrichtung aus Fig. 1 in einer schematischen Darstellung und
Fig. 3
ein schematisches Funktionsdiagramm der erfindungsgemäßen Kochmuldenvorrichtung aus Fig. 1.
Show it:
Fig. 1
a cooking hob according to the invention with a cooktop according to the invention comprising a cooktop device according to the invention, in a schematic plan view,
Fig. 2
a section of the hob according to the invention of the hob according to the invention Fig. 1 in a schematic representation and
Fig. 3
a schematic functional diagram of the hob according to the invention Fig. 1 ,

Fig. 1 zeigt ein erfindungsgemäßes Kochfeld 38, das als ein Induktionskochfeld ausgebildet ist, mit einer erfindungsgemäßen Kochmulde 36, die als eine Induktionskochmulde ausgebildet ist. Die Kochmulde 36 umfasst eine Kochmuldenvorrichtung 10, die als eine Induktionskochmuldenvorrichtung ausgebildet ist. Die Kochmuldenvorrichtung 10 weist einen Grundkörper 40 zu einem Aufstellen von Gargeschirren auf. Der Grundkörper 40 ist als Kochfeldplatte ausgebildet. Die Kochmuldenvorrichtung 10 weist mehrere Heizelemente (nicht dargestellt) auf, die unterhalb des Grundkörpers 40 angeordnet sind. Die Heizelemente, die als Induktionsheizelemente ausgebildet sind, sind jeweils dazu vorgesehen, auf dem Grundkörper 40 oberhalb der Heizelemente aufgestelltes Gargeschirr zu erhitzen. Die Kochmuldenvorrichtung 10 weist in einem in eingebautem Zustand einem Bediener zuweisenden Bereich eine Bedieneinheit 42 zu einer Bedieneingabe von Betriebsparametern auf. Beispielsweise sind die Betriebsparameter als Auswahl und/oder Veränderung einer Heizzone und/oder als eine Einstellung einer Heizleistung und/oder Heizleistungsdichte einer Heizzone ausgebildet. Alternativ sind weitere, einem Fachmann als sinnvoll erscheinende Ausbildungen des Betriebsparameters denkbar. Die Bedieneinheit 42 ist zu einer optischen Ausgabe eines Werts eines Betriebsparameters an einen Bediener vorgesehen. Alternativ oder zusätzlich ist denkbar, dass die Bedieneinheit zu einer akustischen Ausgabe eines Werts eines Betriebsparameters an einen Bediener vorgesehen ist. Die Kochmuldenvorrichtung 10 weist eine Steuereinheit 32 auf, die dazu vorgesehen ist, von dem Gargeschirr bedeckte Heizelemente zu einer gemeinsamen Heizzone zusammenzufassen, die dem Gargeschirr zugeordnet ist. Zudem ist die Steuereinheit 32 dazu vorgesehen, in Abhängigkeit der mittels der Bedieneinheit 42 eingegebenen Betriebsparameter Aktionen auszuführen und/oder Einstellungen zu verändern. Die Kochmuldenvorrichtung 10 umfasst eine Versorgungselektronik 34, die zu einer Versorgung der Heizelemente mit Heizelementstrom vorgesehen ist. Die Versorgungselektronik 34 weist Heizfrequenzeinheiten (nicht dargestellt) zu einer Erzeugung des Heizelementstroms auf. Fig. 1 shows a cooktop 38 according to the invention, which is designed as an induction cooktop, with a cooktop 36 according to the invention, which is designed as an induction cooktop. The cooktop 36 includes a cooktop device 10 that is formed as an induction cooktop device. The hob device 10 has a base body 40 for setting up cooking utensils. The main body 40 is formed as a hob plate. The hob device 10 has a plurality of heating elements (not shown), which are arranged below the main body 40. The heating elements, which are designed as induction heating elements, are each provided to heat cooking utensils placed on the base body 40 above the heating elements. The cooktop device 10 has an operating unit 42 for operating input of operating parameters in an area assigned to an operator in the installed state. For example, the operating parameters are designed as a selection and / or modification of a heating zone and / or as an adjustment of a heating power and / or heating power density of a heating zone. Alternatively, further embodiments of the operating parameter that appear appropriate to a person skilled in the art are conceivable. The operating unit 42 is provided for optically outputting a value of an operating parameter to an operator. Alternatively or additionally, it is conceivable that the operating unit is provided for an acoustic output of a value of an operating parameter to an operator. The hob device 10 has a control unit 32, which is intended to summarize covered by the cooking utensils heating elements to a common heating zone, which is associated with the cooking utensils. In addition, the control unit 32 is provided, depending on the means of the control unit 42nd entered operating parameters to perform actions and / or to change settings. The hob device 10 comprises a supply electronics 34 which is provided to supply the heating elements with Heizelementstrom. The supply electronics 34 has heating frequency units (not shown) for generating the heating element current.

Die Kochmuldenvorrichtung 10 weist eine Schalteinheit 12 auf (vgl. Fig. 2). Die Schalteinheit 12 ist auf einer Elektronikplatine 44 der Kochmuldenvorrichtung 10 angeordnet. Die Schalteinheit 12 ist ausgestattet mit sieben Schaltelementen 14, 16, 18, 20, 22, 24, 26. Jedes Schaltelement 14, 16, 18, 20, 22, 24, 26 ist zu einem reversiblen Schalten zwischen zwei Schaltzuständen vorgesehen. Bei einem Schaltvorgang zwischen zwei Schaltzuständen erzeugt jedes der Schaltelemente 14, 16, 18, 20, 22, 24, 26, die jeweils als Relais ausgebildet sind, ein Schaltgeräusch. Die Heizfrequenzeinheiten der Versorgungselektronik 34, die Schaltelemente 14, 16, 18, 20, 22, 24, 26 der Schalteinheit 12 und die Heizelemente sind Teil eines gemeinsamen Schaltkreises. Der Schaltkreis, der die Schalteinheit 12 mit den Schaltelementen 14, 16, 18, 20, 22, 24, 26 umfasst, ist als elektrischer, geschlossener Schaltkreis ausgebildet. Jedes Schaltelement 14, 16, 18, 20, 22, 24, 26 unterbricht in geöffnetem Schaltzustand den Schaltkreis, der die Schalteinheit 12 umfasst. Jedes Schaltelement 14, 16, 18, 20, 22, 24, 26 ermöglicht in geschlossenem Schaltzustand eine Versorgung der Heizelemente mit Heizelementstrom. Jedes Schaltelement 14, 16, 18, 20, 22, 24, 26 schließt in geschlossenem Schaltzustand den Schaltkreis, der die Schalteinheit 12 umfasst. Jedes Schaltelement 14, 16, 18, 20, 22, 24, 26 führt in geschlossenem Schaltzustand einen durch den Schaltkreis, der die Schalteinheit 12 umfasst, fließenden Heizelementstrom. Die Schaltelemente 14, 16, 18, 20, 22, 24, 26 führen in einem Betriebszustand den Heizelementstrom.The hob device 10 has a switching unit 12 (see. Fig. 2 ). The switching unit 12 is arranged on an electronic circuit board 44 of the hob device 10. The switching unit 12 is equipped with seven switching elements 14, 16, 18, 20, 22, 24, 26. Each switching element 14, 16, 18, 20, 22, 24, 26 is provided for a reversible switching between two switching states. In a switching operation between two switching states generates each of the switching elements 14, 16, 18, 20, 22, 24, 26, which are each designed as a relay, a switching noise. The heating frequency units of the supply electronics 34, the switching elements 14, 16, 18, 20, 22, 24, 26 of the switching unit 12 and the heating elements are part of a common circuit. The circuit comprising the switching unit 12 with the switching elements 14, 16, 18, 20, 22, 24, 26 is formed as an electrical, closed circuit. Each switching element 14, 16, 18, 20, 22, 24, 26 interrupts in the open switching state the circuit comprising the switching unit 12. Each switching element 14, 16, 18, 20, 22, 24, 26 allows, in the closed switching state, a supply of the heating elements with Heizelementstrom. Each switching element 14, 16, 18, 20, 22, 24, 26 closes in the closed switching state, the circuit comprising the switching unit 12. Each switching element 14, 16, 18, 20, 22, 24, 26 leads, in the closed switching state, a heating element current flowing through the circuit comprising the switching unit 12. The switching elements 14, 16, 18, 20, 22, 24, 26 lead in an operating state, the Heizelementstrom.

Die Kochmuldenvorrichtung 10 umfasst eine Sensoreinheit 28 zu einer Detektion einer Kontaktherstellung der Schaltelemente 14, 16, 18, 20, 22, 24, 26. Die Sensoreinheit 28 ist auf der Elektronikplatine 44 angeordnet. Die Sensoreinheit 28 ist zu der Schalteinheit 12 beabstandet angeordnet. Ein Abstand der Sensoreinheit 28 zu einem nächstgelegenen Schaltelement 24 der Schalteinheit 12 beträgt im Wesentlichen 2 cm. Ein Abstand der Sensoreinheit 28 zu einem entferntest gelegenen Schaltelement 14 der Schalteinheit 12 beträgt im Wesentlichen 20 cm. Ein Abstand der Sensoreinheit 28 zu den weiteren Schaltelementen 16, 18, 20, 22, 26 der Schalteinheit 12 beträgt im Wesentlichen zwischen 2 cm und 20 cm. Die Sensoreinheit 28 ist außerhalb des Schaltkreises, der die Schalteinheit 12 umfasst, angeordnet. Die Sensoreinheit 28 ist in einem Betriebszustand von einer anderen Phase betrieben als der Schaltkreis, der die Schalteinheit 12 umfasst. In einer alternativen Ausgestaltung der Erfindung ist denkbar, dass die Sensoreinheit in einem Betriebszustand von der gleichen Phase betrieben ist wie der Schaltkreis, der die Schalteinheit umfasst. Die Sensoreinheit 28 und die Schalteinheit 12 sind elektrisch unabhängig angeordnet.The cooktop device 10 comprises a sensor unit 28 for detecting a contact production of the switching elements 14, 16, 18, 20, 22, 24, 26. The sensor unit 28 is arranged on the electronic circuit board 44. The sensor unit 28 is arranged at a distance from the switching unit 12. A distance of the sensor unit 28 to a nearest switching element 24 of the switching unit 12 is substantially 2 cm. A distance of the sensor unit 28 to a remotely located switching element 14 of the switching unit 12 is substantially 20 cm. A distance of the sensor unit 28 to the other switching elements 16, 18, 20, 22, 26 of the switching unit 12 is substantially between 2 cm and 20 cm. The sensor unit 28 is disposed outside of the circuit comprising the switching unit 12. The sensor unit 28 is operated in an operating state of a different phase than the circuit comprising the switching unit 12. In an alternative embodiment of the invention, it is conceivable that the sensor unit is operated in an operating state of the same phase as the circuit comprising the switching unit. The sensor unit 28 and the switching unit 12 are arranged electrically independently.

Die Sensoreinheit 28 weist genau ein Sensorelement 30 auf, das zu einer Detektion einer Kontaktherstellung von allen Schaltelementen 14, 16, 18, 20, 22, 24, 26 der Schalteinheit 12 vorgesehen ist. Die Sensoreinheit 28 detektiert in einem Verfahren zum Betrieb der Kochmuldenvorrichtung 10 eine Kontaktherstellung der Schaltelemente 14, 16, 18, 20, 22, 24, 26 mittels des Sensorelements 30. Hierbei detektiert die Sensoreinheit 28 eine Kontaktherstellung der Schaltelemente 14, 16, 18, 20, 22, 24, 26 zeitlich versetzt. In einem ersten Zeitfenster detektiert die Sensoreinheit 28 eine Kontaktherstellung eines ersten Schaltelements 14, 16, 18, 20, 22, 24, 26. In einem zweiten Zeitfenster, das zu dem ersten Zeitfenster zeitlich beabstandet ist, detektiert die Sensoreinheit 28 eine Kontaktherstellung eines zweiten Schaltelements 14, 16, 18, 20, 22, 24, 26. Zu einer Detektion der Kontaktherstellung der Schaltelemente 14, 16, 18, 20, 22, 24, 26 weist die Sensoreinheit 28 ein Mikrofon auf. Das Sensorelement 30 ist als Mikrofon ausgebildet. Die Sensoreinheit 28 detektiert ein Schaltgeräusch der Schaltelemente 14, 16, 18, 20, 22, 24, 26. Die Sensoreinheit 28 ist mit der Schalteinheit 12 über Schall gekoppelt. Die Sensoreinheit 28 detektiert eine Kontaktherstellung eines der Schaltelemente 14, 16, 18, 20, 22, 24, 26, wenn genau eines der Schaltelemente 14, 16, 18, 20, 22, 24, 26 schaltet.The sensor unit 28 has exactly one sensor element 30, which is provided for detecting contact production of all the switching elements 14, 16, 18, 20, 22, 24, 26 of the switching unit 12. In a method for operating the cooktop device 10, the sensor unit 28 detects a contact production of the switching elements 14, 16, 18, 20, 22, 24, 26 by means of the sensor element 30. Here, the sensor unit 28 detects a contact production of the switching elements 14, 16, 18, 20 , 22, 24, 26 offset in time. In a first time window, the sensor unit 28 detects contact making of a first switching element 14, 16, 18, 20, 22, 24, 26. In a second time window, spaced in time with the first time window, the sensor unit 28 detects contact making of a second switching element 14, 16, 18, 20, 22, 24, 26. For a detection of the contact-making of the switching elements 14, 16, 18, 20, 22, 24, 26, the sensor unit 28 has a microphone. The sensor element 30 is designed as a microphone. The sensor unit 28 detects a switching noise of the switching elements 14, 16, 18, 20, 22, 24, 26. The sensor unit 28 is coupled to the switching unit 12 via sound. The sensor unit 28 detects contact making of one of the switching elements 14, 16, 18, 20, 22, 24, 26 when exactly one of the switching elements 14, 16, 18, 20, 22, 24, 26 switches.

Die Steuereinheit 32 veranlasst einen Schaltvorgang der Schaltelemente 14, 16, 18, 20, 22, 24, 26. Hierzu steuert die Steuereinheit 32 eine Treiberelektronik 46 an, die die Schaltelemente 14, 16, 18, 20, 22, 24, 26 zu einem Schaltvorgang anregt (vgl. Fig. 3). Die Ansteuerung eines Schaltelements 14, 16, 18, 20, 22, 24, 26 mittels der Treiberelektronik 46 ist als Anfangspunkt einer Umschaltdauer des Schaltelements 14, 16, 18, 20, 22, 24, 26 ausgebildet. Beispielsweise veranlasst die Steuereinheit 32 ein Schalten eines der Schaltelemente 14, 16, 18, 20, 22, 24, 26. Die Steuereinheit 32 ermittelt ein Schaltzeitfenster, in welchem ein Schaltvorgang des Schaltelements 14, 16, 18, 20, 22, 24, 26 zu erwarten ist. Die Steuereinheit 32 interpretiert ein von dem Sensorelement 30 innerhalb des Schaltzeitfensters detektiertes Signal als Schalten des Schaltelements 14, 16, 18, 20, 22, 24, 26. Die Steuereinheit 32 berechnet in Abhängigkeit von der Detektion einer Kontaktherstellung des Schaltelements 14, 16, 18, 20, 22, 24, 26 eine Umschaltdauer des Schaltelements 14, 16, 18, 20, 22, 24, 26. Die Kontaktherstellung des Schaltelements 14, 16, 18, 20, 22, 24, 26 ist als Endpunkt einer Umschaltdauer des Schaltelements 14, 16, 18, 20, 22, 24, 26 ausgebildet.The control unit 32 causes a switching operation of the switching elements 14, 16, 18, 20, 22, 24, 26. For this purpose, the control unit 32 controls a driver electronics 46, the switching elements 14, 16, 18, 20, 22, 24, 26 to a Switching action is stimulated (see. Fig. 3 ). The control of a switching element 14, 16, 18, 20, 22, 24, 26 by means of the driver electronics 46 is formed as the starting point of a switching period of the switching element 14, 16, 18, 20, 22, 24, 26. For example, the control unit 32 causes a switching of one of the switching elements 14, 16, 18, 20, 22, 24, 26. The control unit 32 determines a switching time window, in which a switching operation of the switching element 14, 16, 18, 20, 22, 24, 26 is to be expected. The control unit 32 interprets one of the sensor element 30 signal detected within the switching time window as switching of the switching element 14, 16, 18, 20, 22, 24, 26. The control unit 32 calculates a function of the detection of contact making of the switching element 14, 16, 18, 20, 22, 24, 26 a Switching time of the switching element 14, 16, 18, 20, 22, 24, 26. The contact production of the switching element 14, 16, 18, 20, 22, 24, 26 is the end point of a switching period of the switching element 14, 16, 18, 20, 22nd , 24, 26 are formed.

Die Sensoreinheit 28 umfasst ein Sendemodul zu einer Übertragung einer Schaltkenngröße an die Steuereinheit 32. Die Steuereinheit 32 umfasst ein Empfangsmodul zu einem Empfang von der Sensoreinheit 28 übermittelter Schaltkenngrößen. Nach einer Detektion einer Kontaktherstellung eines Schaltelements 14, 16, 18, 20, 22, 24, 26 wird das detektierte Signal von der Sensoreinheit 28 in ein analoges Signal umgewandelt. Ebenfalls denkbar ist, dass die Sensoreinheit einen Verstärker zu einer Verstärkung des detektierten Signals umfasst. Zudem könnte die Sensoreinheit einen Filter und/oder einen Analog-Digital-Wandler aufweisen. Nach erfolgter Umwandlung des detektierten Signals übermittelt die Sensoreinheit 28 das analoge Signal an die Steuereinheit 32.The sensor unit 28 comprises a transmitting module for transmitting a switching characteristic to the control unit 32. The control unit 32 comprises a receiving module for receiving switching parameters transmitted by the sensor unit 28. After a detection of a contact production of a switching element 14, 16, 18, 20, 22, 24, 26, the detected signal is converted by the sensor unit 28 into an analog signal. It is also conceivable that the sensor unit comprises an amplifier for amplifying the detected signal. In addition, the sensor unit could have a filter and / or an analog-to-digital converter. After conversion of the detected signal, the sensor unit 28 transmits the analog signal to the control unit 32.

Die Sensoreinheit 28 detektiert nach im Wesentlichen 100 Schaltvorgängen eines Schaltelements 14, 16, 18, 20, 22, 24, 26 eine Kontaktherstellung des Schaltelements 14, 16, 18, 20, 22, 24, 26 neu. Die Sensoreinheit 28 detektiert nach im Wesentlichen 100 Schaltvorgängen jedes Schaltelements 14, 16, 18, 20, 22, 24, 26 eine Kontaktherstellung der Schaltelemente 14, 16, 18, 20, 22, 24, 26 neu. Die Steuereinheit 32 ermittelt die Umschaltdauer der Schaltelemente 14, 16, 18, 20, 22, 24, 26 nach im Wesentlichen 100 Schaltvorgängen der Schaltelemente 14, 16, 18, 20, 22, 24, 26 neu. Hierbei verwendet die Steuereinheit 32 die neu von der Sensoreinheit 28 detektierten Schaltkenngrößen, die die Steuereinheit 32 von der Sensoreinheit 28 empfangen hat. Die Steuereinheit 32 berücksichtigt bei Ermittlung der Umschaltdauer der Schaltelemente 14, 16, 18, 20, 22, 24, 26 einen Abstand der Sensoreinheit 28 zu der Schalteinheit 12. Ein Abstand jedes Schaltelements 14, 16, 18, 20, 22, 24, 26 ist in einer Speichereinheit der Steuereinheit 32 gespeichert. Veranlasst die Steuereinheit 32 beispielsweise einen Schaltvorgang des entferntest gelegenen Schaltelements 14 der Schalteinheit 12, so berücksichtigt die Steuereinheit 32 einen Abstand von im Wesentlichen 20 cm. Veranlasst die Steuereinheit 32 einen Schaltvorgang des nächstgelegenen Schaltelements 24 der Schalteinheit 12, so berücksichtigt die Steuereinheit 32 einen Abstand von im Wesentlichen 2 cm.After substantially 100 switching operations of one switching element 14, 16, 18, 20, 22, 24, 26, the sensor unit 28 detects a contact production of the switching element 14, 16, 18, 20, 22, 24, 26. After substantially 100 switching operations of each switching element 14, 16, 18, 20, 22, 24, 26, the sensor unit 28 detects a contact production of the switching elements 14, 16, 18, 20, 22, 24, 26. The control unit 32 determines the switching period of the switching elements 14, 16, 18, 20, 22, 24, 26 after substantially 100 switching operations of the switching elements 14, 16, 18, 20, 22, 24, 26. Here, the control unit 32 uses the newly detected by the sensor unit 28 switching characteristics, the control unit 32 has received from the sensor unit 28. The control unit 32 takes into account the distance of the sensor unit 28 to the switching unit 12 when determining the switching time of the switching elements 14, 16, 18, 20, 22, 24, 26. A distance of each switching element 14, 16, 18, 20, 22, 24, 26 is stored in a storage unit of the control unit 32. For example, if the control unit 32 causes a switching operation of the most remote switching element 14 of the switching unit 12, the control unit 32 takes a distance of substantially 20 cm. Causes the control unit 32, a switching operation of the nearest switching element 24 of the switching unit 12, so the control unit 32 takes a distance of substantially 2 cm.

Die Steuereinheit 32 legt in Abhängigkeit von der Umschaltdauer eine Ausschaltdauer der Versorgungselektronik 34, die in einem Betriebszustand zu einer Versorgung der Heizelemente mit Heizelementstrom vorgesehen ist, fest. Die Steuereinheit 32 deaktiviert in einem ersten Verfahrensschritt die Versorgungselektronik 34. In einem weiteren Verfahrensschritt veranlasst die Steuereinheit 32 einen Schaltvorgang eines Schaltelements 14, 16, 18, 20, 22, 24, 26 und berechnet ein Schaltzeitfenster, in welchem ein Schaltvorgang des Schaltelements 14, 16, 18, 20, 22, 24, 26 zu erwarten ist. Nach Detektion der Kontaktherstellung des Schaltelements 14, 16, 18, 20, 22, 24, 26 übermittelt die Sensoreinheit 28 eine Schaltkenngröße an die Steuereinheit 32. Die Steuereinheit 32 interpretiert ein von dem Sensorelement 30 innerhalb des Schaltzeitfensters detektiertes Signal als Schalten des Schaltelements 14, 16, 18, 20, 22, 24, 26. Anschließend aktiviert die Steuereinheit 32 die Versorgungselektronik 34.The control unit 32 defines a switch-off duration of the supply electronics 34, which is provided in an operating state for supplying the heating elements with heating element current, as a function of the switch-over duration. In a further method step, the control unit 32 initiates a switching operation of a switching element 14, 16, 18, 20, 22, 24, 26 and calculates a switching time window in which a switching operation of the switching element 14, 16, 18, 20, 22, 24, 26 is to be expected. After detection of the contact making of the switching element 14, 16, 18, 20, 22, 24, 26, the sensor unit 28 transmits a switching characteristic to the control unit 32. The control unit 32 interprets a signal detected by the sensor element 30 within the switching time window as switching of the switching element 14, 16, 18, 20, 22, 24, 26. Subsequently, the control unit 32 activates the supply electronics 34.

In einer weiteren Ausgestaltung der Erfindung ist denkbar, dass die Steuereinheit dazu vorgesehen ist, in Abhängigkeit von der Detektion einer Kontaktherstellung des Schaltelements zumindest eine Pulsdauer zu einem Antrieb des beweglichen Schaltteils des Schaltelements zu berechnen, um insbesondere eine geräuscharme Kontaktherstellung des Schaltelements zu erreichen. Insbesondere ist die Steuereinheit dazu vorgesehen, während der Pulsdauer ein Schalten des Schaltelements zu bewirken, woraufhin das bewegliche Schaltteil, ausgehend von einer ersten Kontaktstelle in Richtung einer zweiten Kontaktstelle in Bewegung versetzt wird. Insbesondere ist die Steuereinheit dazu vorgesehen, nach Ende der Pulsdauer eine Versorgung des Schaltelements mit elektrischem Strom zu unterbrechen, wobei sich das bewegliche Schaltteil insbesondere aufgrund der Trägheit weiterbewegt. Insbesondere wird das Schaltteil bei einer Bewegung nach Unterbrechen der Versorgung des Schaltelements mit elektrischem Strom durch eine Reibungskraft und/oder Federkraft verlangsamt. Insbesondere ist die Steuereinheit dazu vorgesehen, eine Pulsdauer festzulegen, um ein Erreichen der zweiten Kontaktstelle durch das Schaltteil mit einer Geschwindigkeit von zumindest im Wesentlichen 0 m/s zu erreichen. Insbesondere ist die Steuereinheit dazu vorgesehen, kurz vor Erreichen der zweiten Kontaktstelle durch das bewegliche Schaltelement zumindest eine Versorgung der Schaltelemente, insbesondere die Treiberelektronik, zu einer Versorgung zu aktivieren. Insbesondere ist die Steuereinheit dazu vorgesehen, bei einer Detektion eines Geräuschs mittels der Sensoreinheit die Pulsdauer anzupassen, um insbesondere eine geräuscharme Kontaktherstellung des Schaltelements zu erreichen. Insbesondere ist die Steuereinheit dazu vorgesehen, bei Stillstand des Schaltteils vor Erreichen der zweiten Kontaktstelle die Pulsdauer anzupassen, um insbesondere eine geräuscharme Kontaktherstellung des Schaltelements zu erreichen.In a further embodiment of the invention, it is conceivable that the control unit is provided to calculate, depending on the detection of a contact production of the switching element at least one pulse duration to a drive of the movable switching part of the switching element, in particular to achieve a low-noise contact production of the switching element. In particular, the control unit is provided to effect switching of the switching element during the pulse duration, whereupon the movable switching part is set in motion starting from a first contact point in the direction of a second contact point. In particular, the control unit is provided after the end of the pulse duration to interrupt a supply of the switching element with electric current, wherein the movable switching part in particular moves on because of the inertia. In particular, the switching part is slowed down in a movement after interrupting the supply of the switching element with electric current by a frictional force and / or spring force. In particular, the control unit is provided to set a pulse duration in order to achieve reaching the second contact point by the switching part at a speed of at least substantially 0 m / s. In particular, the control unit is provided, shortly before reaching the second contact point by the movable switching element, at least one supply of the switching elements, in particular the Driver electronics, to activate a supply. In particular, the control unit is provided to adjust the pulse duration in a detection of a noise by means of the sensor unit, in particular to achieve a low-noise contact production of the switching element. In particular, the control unit is provided to adjust the pulse duration at standstill of the switching part before reaching the second contact point, in particular to achieve a low-noise contact production of the switching element.

Bezugszeichenreference numeral

1010
KochmuldenvorrichtungCooktop device
1212
Schalteinheitswitching unit
1414
Schaltelementswitching element
1616
Schaltelementswitching element
1818
Schaltelementswitching element
2020
Schaltelementswitching element
2222
Schaltelementswitching element
2424
Schaltelementswitching element
2626
Schaltelementswitching element
2828
Sensoreinheitsensor unit
3030
Sensorelementsensor element
3232
Steuereinheitcontrol unit
3434
Versorgungselektroniksupply electronics
3636
Kochmuldecooktop
3838
Kochfeldhob
4040
Grundkörperbody
4242
Bedieneinheitoperating unit
4444
Elektronikplatineelectronic board
4646
Treiberelektronikdriver electronics

Claims (11)

  1. Cooking hob device, in particular induction cooking hob device, having at least one switching unit (12) which comprises at least one switching element (14, 16, 18, 20, 22, 24, 26) which is provided in order to switch reversibly between at least two switching states and to conduct a heating element current in at least one operating state, and having at least one sensor unit (28) at least for detection of an establishment of contact of the switching element (14, 16, 18, 20, 22, 24, 26), characterised in that the sensor unit (28) is arranged at least essentially outside at least one circuit which comprises the switching unit (12), wherein the sensor unit (28) and the switching unit (12) are arranged at least essentially so as to be free of electrical interaction with one another.
  2. Cooking hob device according to claim 1, characterised in that the sensor unit (28) has at least one microphone.
  3. Cooking hob device according to one of the preceding claims, characterised in that the sensor unit (28) and the switching unit (12) are arranged electrically independently.
  4. Cooking hob device according to one of the preceding claims, characterised in that the sensor unit (28) has at least one sensor element (30), which is provided at least for the detection of an establishment of contact of at least two switching elements (14, 16, 18, 20, 22, 24, 26) of the switching unit (12).
  5. Cooking hob device according to one of the preceding claims, characterised in that the switching element (14, 16, 18, 20, 22, 24, 26) is designed as a relay.
  6. Cooking hob device according to one of the preceding claims, characterised by at least one control unit (32) which is provided to calculate at least one switching time of the switching element (14, 16, 18, 20, 22, 24, 26) as a function of the detection of the establishment of contact of the switching element (14, 16, 18, 20, 22, 24, 26).
  7. Cooking hob device according to claim 6, characterised in that the control unit (32) is provided in order to redetermine the switching time of the switching element (14, 16, 18, 20, 22, 24, 26) after at least essentially 25 switching operations of the switching element (14, 16, 18, 20, 22, 24, 26).
  8. Cooking hob device at least according to claim 6, characterised in that the control unit (32) is provided, during a determination of the switching time of the switching element (14, 16, 18, 20, 22, 24, 26), to take into consideration at least one distance of the sensor unit (28) from the switching unit (12).
  9. Cooking hob device at least according to claim 6, characterised in that the control unit (32) is provided, as a function of the switching time, to establish at least one off-time of a supply electronics unit (34) which is provided in at least one operating state to supply at least one heating element with heating element current.
  10. Cooking hob having at least one cooking hob device (10) according to one of claims 1 to 9.
  11. Method for operating a cooking hob device (10) according to one of claims 1 to 9, having at least one switching unit (12), which comprises at least one switching element (14, 16, 18, 20, 22, 24, 26), wherein the switching element (14, 16, 18, 20, 22, 24, 26) is used to switch reversibly between at least two switching states and to conduct a heating element current in at least one operating state, and having at least one sensor unit (28) which enables at least one establishment of contact of the switching element (14, 16, 18, 20, 22, 24, 26) to be detected, wherein the sensor unit (28) is arranged at least essentially outside at least one circuit comprising the switching unit (12), and wherein the sensor unit (28) and the switching unit (12) are arranged at least essentially so as to be free of electrical interaction with one another.
EP14183193.3A 2013-09-18 2014-09-02 Cooking hob Active EP2852249B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES201331355A ES2531904B1 (en) 2013-09-18 2013-09-18 Cooking countertop device

Publications (2)

Publication Number Publication Date
EP2852249A1 EP2852249A1 (en) 2015-03-25
EP2852249B1 true EP2852249B1 (en) 2017-04-12

Family

ID=51429179

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US4952766A (en) * 1987-10-26 1990-08-28 Microwave Products Of America, Inc. Sensor and pop detector for microwave popcorn control
US5096725A (en) * 1989-01-11 1992-03-17 Kim Kyung H Automatic cooking method
ES2042359B1 (en) 1991-04-29 1995-10-01 Fagor S Coop Ltda SYSTEM FOR THE MEASUREMENT OF THE SWITCHING TIMES IN POWER RELAYS.
WO2009135519A1 (en) * 2008-05-09 2009-11-12 Siemens Aktiengesellschaft Method and device for controlling a magnetic actuator
DE102008046374B3 (en) * 2008-09-09 2009-12-31 Siemens Aktiengesellschaft Electromagnetic switchgear e.g. relay, has contact system standing in effective connection with magnetic system, and sensor arranged at side of yoke lying opposite to movable armature, where sensor detects impact torque of armature
ES2386456B1 (en) * 2010-06-28 2013-07-19 BSH Electrodomésticos España S.A. COOKING HOB DEVICE
ES2396336B1 (en) * 2010-11-10 2014-02-11 BSH Electrodomésticos España S.A. Cooktop and cooktop heating device with such a device

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US10260753B2 (en) 2015-10-28 2019-04-16 BSH Hausgeräte GmbH Domestic-appliance heating device

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ES2626778T3 (en) 2017-07-26
ES2531904B1 (en) 2016-01-04
ES2531904A1 (en) 2015-03-20
EP2852249A1 (en) 2015-03-25

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