EP2774456B1 - Induction heating apparatus - Google Patents

Induction heating apparatus Download PDF

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Publication number
EP2774456B1
EP2774456B1 EP12806669.3A EP12806669A EP2774456B1 EP 2774456 B1 EP2774456 B1 EP 2774456B1 EP 12806669 A EP12806669 A EP 12806669A EP 2774456 B1 EP2774456 B1 EP 2774456B1
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EP
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Prior art keywords
induction heating
units
unit
rectifier
heating apparatus
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EP12806669.3A
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German (de)
French (fr)
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EP2774456A2 (en
Inventor
Daniel Anton Falcon
Sergio Llorente Gil
Daniel Palacios Tomas
Diego Puyal Puente
Hector Sarnago Andia
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BSH Hausgeraete GmbH
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BSH Hausgeraete GmbH
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/06—Control, e.g. of temperature, of power
    • H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
    • H05B6/065—Control, e.g. of temperature, of power for cooking plates or the like using coordinated control of multiple induction coils

Definitions

  • the invention is based on an induction heating device according to the preamble of claim 1.
  • Induction hobs are known, which have rectifiers connected to two different phases, which are intended to supply different inverters in each case.
  • the document US2011 / 0147375 A1 discloses an induction device according to the preamble of claim 1.
  • the object of the invention is in particular to provide a generic device with improved electrical efficiency.
  • the object is achieved by the features of claim 1, while advantageous embodiments and modifications of the invention can be taken from the dependent claims.
  • the invention is based on an induction heating device, in particular an induction hob device, with at least two heating frequency units, which are intended to be connected to different energy sources and, in particular, are connected to different energy sources in at least one operating state.
  • the induction heating device has at least one first switching unit which is provided to connect at least the two heating frequency units in at least one operating mode to a single one of the at least two energy sources.
  • a "heating frequency unit” should in particular be understood to mean an electrical unit which generates an oscillating electrical signal, preferably at a frequency of at least 1 kHz, in particular of at least 10 kHz, advantageously of at least 20 kHz, and in particular of not more than 100 kHz for an induction heating unit ,
  • the heating frequency unit is intended to provide a maximum electrical power of at least 1000 W, in particular at least 2000 W, advantageously at least 3000 W and preferably at least 3500 W, required by an induction heating unit.
  • the heating frequency unit comprises at least one inverter, which preferably has at least two, preferably in series, bidirectional unipolar switches, which are formed in particular by a transistor and a diode connected in parallel, and particularly advantageous at least in each case one parallel to the bidirectional unipolar switches switched damping capacity, which is in particular formed by at least one capacitor.
  • An "energy source” is to be understood in particular as meaning an electrical energy source, preferably an alternating voltage source, in particular a phase of a multi-phase house connection.
  • the induction heating device has at least two connection points, which are intended to be connected to energy sources.
  • a “switching unit” is to be understood in particular as a unit having at least one switching element.
  • a “switching element” is to be understood as meaning, in particular, an electrical, preferably passive, component which is provided to disconnect and / or connect at least one electrical connection.
  • a switching element has at least one control input and is provided to switch in dependence on a, applied to the control input electrical signal.
  • the switching element is designed as a semiconductor component, preferably as a relay.
  • “provided” is intended to be understood in particular specially programmed, designed and / or equipped. In particular, an increased electrical efficiency can be achieved since losses in the rectifier units, in particular in semiconductor components of the rectifier units, increase disproportionately with a current flowing through the rectifier units.
  • the induction heating device has at least two induction heating units, which are intended to be operated in at least one operating mode of respectively different ones of the at least two heating frequency units.
  • An "induction heating unit” is to be understood in particular as meaning a unit which has at least one induction heating element.
  • An “induction heating element” should in particular be understood to mean a heating element which is intended to convert a high-frequency alternating current, in particular an alternating current having a frequency between 20 kHz and 100 kHz, into an alternating magnetic field which is induced by induction and / or magnetic reversal effects metallic, in particular ferromagnetic, body, in particular in a radiator and / or a cooking utensil, generates heat.
  • an induction heating element has at least a wound, in particular circular disk wound conductor. In particular, increased comfort can be achieved.
  • the induction heating device has at least one second switching unit which is provided to allow simultaneous operation of at least one of the induction heating units with at least two heating frequency units in at least one operating mode.
  • at least one second switching unit which is provided to allow simultaneous operation of at least one of the induction heating units with at least two heating frequency units in at least one operating mode.
  • an increased electrical efficiency can be achieved.
  • the induction heating device has at least two rectifier units with which in at least one operating mode in each case different ones of the at least two heating frequency units are connected.
  • a "rectifier unit” should be understood in particular to mean a unit which has at least one rectifier and is intended to rectify and output an electrical alternating voltage which is applied to input contacts and to output them to output contacts.
  • a rectifier unit preferably has at least one semiconductor component, preferably a diode.
  • a rectifier unit has at least one half-wave rectifier, preferably a bridge rectifier.
  • controllable rectifiers and / or boost rectifiers are conceivable.
  • the rectifier unit has a buffer capacity, in particular a capacitor unit, which is provided to achieve a smoothing of the rectified AC voltage.
  • an output voltage of the rectifier unit is a pulsating DC voltage.
  • a heating frequency unit is "connected" to a rectifier unit, it should be understood in particular that the heating frequency unit is connected via a current path to the rectifier unit, which differs from a current path that leads across more than one rectifier. In particular, an increased electrical efficiency can be achieved.
  • the induction heating device has at least one further switching unit which is provided to switch at least the two rectifier units in parallel on the consumer side in at least one operating mode.
  • the fact that the rectifier units are connected in parallel on the consumer side should in particular mean that the output contacts of the same name, in particular output contacts with the same-pole voltage, of the rectifier units are connected to one another are connected.
  • the further switching unit is arranged between the rectifier units and the at least two heating frequency units. In particular, an increased electrical efficiency can be achieved.
  • At least the two rectifier units each have a filter unit.
  • a "filter unit” is to be understood as meaning, in particular, an active and / or passive electronic unit which is intended to prevent a load from being fed into a power source, in particular a power grid, voltage peaks and / or off-grid frequencies.
  • the filter unit has at least one choke coil. In particular, a higher electrical efficiency can be achieved.
  • the domestic appliance device has at least one control unit which controls at least the first switching unit at least as a function of services requested for the consumers.
  • a "control unit” is to be understood in particular as meaning an electronic unit which is preferably at least partially integrated in a control and / or regulating unit of a home appliance device and which is preferably provided to control at least the first switching unit and in particular to control a power consumption of the consumer units and / or to regulate.
  • 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, a higher electrical efficiency can be achieved.
  • FIG. 1 shows a designed as a hob home appliance 10 in a schematic view.
  • the domestic appliance 10 has an induction heating device 12 designed as an induction hob device.
  • the induction heating device 12 has two heating frequency units 30, 32, which are intended to be connected to different energy sources 14, 16.
  • the heating frequency units 30, 32 are designed as inverters.
  • the induction heating device 12 has a first switching unit 40, which is provided to connect the two heating-frequency units 30, 32 to a single energy source 14, 16 in one operating mode.
  • the induction heating device 12 has two induction heating units 34, 36, which are intended to be operated in an operating mode of respectively different ones of the two heating-frequency units 30, 32.
  • the induction heating device 12 has a second switching unit 60, which is provided to allow simultaneous operation of one of the induction heating units 34, 36 with the two heating frequency units 30, 32 in one operating mode. Furthermore, the induction heating device 12 has two rectifier units 20, 22, to which in each case different of the two heating-frequency units 30, 32 are connected in one operating mode. Furthermore, the induction heating device 12 has a further switching unit 50, which is provided to switch the two rectifier units 20, 22 on the consumer side in parallel in an operating mode.
  • the two rectifier units 20, 22 each have a filter unit 24, 26.
  • the two rectifier units 20, 22 each have a rectifier 21, 23 configured as a bridge rectifier.
  • the induction heating device 12 has a control unit 70, which controls the second and the first switching unit 40, 60 as a function of the powers required for the induction heating units 34, 36.
  • the control unit 70 is provided to control the further switching unit 50.
  • the control unit 70 is provided to control the heating frequency units 30, 32 and thus a power consumption of the induction heating units 34, 36.
  • the energy sources 14, 16 are designed as phases of a multi-phase house connection.
  • the induction heating device 12 has an adjusting means 72, which is provided to allow an operator to set a maximum of the power sources 14, 16 to be related current.
  • the first switching unit 40 has two switching elements 42, 44.
  • the switching elements 42, 44 are designed as relays.
  • the switching elements 42, 44 are formed as a single pole changeover switch.
  • the first switching unit 40 is provided to the rectifier unit 20 either with the Energy source 14 or the power source 16 to connect. In an initial state, the first switching unit 40 connects the rectifier unit 20 to the power source 14 and the rectifier unit 22 to the power source 16.
  • the second switching unit 60 has two switching elements 62, 64.
  • the switching elements 62, 64 are designed as relays.
  • the switching elements 62, 64 are formed as a single pole changeover switch.
  • the second switching unit 60 is provided to either connect the induction heating units 34, 36 respectively to one of the heating frequency units 30, 32 or to operate one of the induction heating units 34, 36 with both heating frequency units 30, 32 in a boost mode.
  • the second switching unit 60 connects the induction heating unit 34 with the heating frequency unit 30 and the induction heating unit 36 with the heating frequency unit 32.
  • the further switching unit 50 has two switching elements 52, 54.
  • the switching elements 52, 54 are designed as relays.
  • the switching elements 52, 54 are designed as a single-pole power switch. In the initial state, a connection of output contacts of the rectifier units 20, 22 via the switching elements 52, 54 is disconnected.
  • the switching elements 42 and 44 are formed in pairs as a two-pole changeover switch and thus via a single control member, in particular a relay coil, are switchable.
  • the switching elements 52 and 54 are formed in pairs as a two-pole power switch and thus via a single control member, in particular a relay coil, are switchable.
  • the control unit 70 is provided for Switching units 40, 50, 60 to be left in their respective initial states.
  • the induction heating units 34, 36 are operated via completely different power electronics.
  • a second operating mode in which an operator requests powers for the induction heating units 34, 36 which in total correspond to a maximum of a power which may be obtained from the individual power source 16 to the maximum, the control unit 70 is provided to power the switching unit 60 in FIG leave their initial state and the switching units 40 and 50 to switch.
  • both rectifier units 20, 22 are connected to the power source 16 and the rectifier units 20, 22 are connected in parallel on the consumer side.
  • the Induction heating units 34, 36 are each operated via two rectifier units 20, 22.
  • the control unit 70 is provided to switch all the switching units 40, 50, 60. Both rectifier units 20, 22 are connected to the energy source 16, the rectifier units 20, 22 are connected in parallel on the consumer side, and the induction heating unit 34 is connected to both rectifier units 20, 22.
  • embodiments of the invention with more than two, in particular at least three, advantageously at least four, induction heating units, rectifier units and / or heating frequency units are conceivable.
  • such a configuration has more complex switching units adapted to the larger numbers.
  • control unit 70 is provided to close the switching unit 40 constantly when only one power source 16 is connected to the induction heating device 12.

Description

Die Erfindung geht aus von einer Induktionsheizvorrichtung nach dem Oberbegriff des Anspruchs 1.The invention is based on an induction heating device according to the preamble of claim 1.

Es sind Induktionskochfelder bekannt, die an zwei unterschiedliche Phasen angeschlossene Gleichrichter aufweisen, die dazu vorgesehen sind, jeweils unterschiedliche Inverter zu versorgen. Das Dokument US2011/0147375 A1 offenbart eine Induktionsvorrichtung gemäß dem Oberbegriff des Anspruchs 1.Induction hobs are known, which have rectifiers connected to two different phases, which are intended to supply different inverters in each case. The document US2011 / 0147375 A1 discloses an induction device according to the preamble of claim 1.

Die Aufgabe der Erfindung besteht insbesondere darin, eine gattungsgemäße Vorrichtung mit verbesserter elektrischer Effizienz bereitzustellen. Die Aufgabe wird erfindungsgemäß durch die Merkmale des Patentanspruchs 1 gelöst, während vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung den Unteransprüchen entnommen werden können.The object of the invention is in particular to provide a generic device with improved electrical efficiency. The object is achieved by the features of claim 1, while advantageous embodiments and modifications of the invention can be taken from the dependent claims.

Die Erfindung geht aus von einer Induktionsheizvorrichtung, insbesondere einer Induktionskochfeldvorrichtung, mit zumindest zwei Heizfrequenzeinheiten, die dazu vorgesehen sind, mit unterschiedlichen Energiequellen verbunden zu werden und die insbesondere in zumindest einem Betriebszustand mit unterschiedlichen Energiequellen verbunden sind.The invention is based on an induction heating device, in particular an induction hob device, with at least two heating frequency units, which are intended to be connected to different energy sources and, in particular, are connected to different energy sources in at least one operating state.

Es wird vorgeschlagen, dass die Induktionsheizvorrichtung zumindest eine erste Schalteinheit aufweist, die dazu vorgesehen ist, in wenigstens einem Betriebsmodus zumindest die zwei Heizfrequenzeinheiten mit einer einzelnen der zumindest zwei Energiequellen zu verbinden. Unter einer "Heizfrequenzeinheit" soll insbesondere eine elektrische Einheit verstanden werden, die ein oszillierendes elektrisches Signal, vorzugsweise mit einer Frequenz von zumindest 1 kHz, insbesondere von wenigstens 10 kHz, vorteilhaft von mindestens 20 kHz, und insbesondere von maximal 100 kHz für eine Induktionsheizeinheit erzeugt. Insbesondere ist die Heizfrequenzeinheit dazu vorgesehen, eine, von einer Induktionsheizeinheit geforderte, maximale elektrische Leistung von zumindest 1000 W, insbesondere zumindest 2000 W, vorteilhaft zumindest 3000 W und vorzugsweise zumindest 3500 W bereitzustellen. Die Heizfrequenzeinheit umfasst insbesondere zumindest einen Wechselrichter, der vorzugsweise zumindest zwei, vorzugsweise in Reihe geschaltete, bidirektionale unipolare Schalter, die insbesondere von einem Transistor und einer parallel geschalteten Diode gebildet sind, und besonders vorteilhaft zumindest jeweils einen parallel zu den bidirektionalen unipolaren Schaltern geschaltete Dämpfungskapazität, die insbesondere von zumindest einem Kondensator gebildet ist, aufweist. Hierdurch kann eine hochfrequente Energieversorgung der Induktionsheizeinheit bereitgestellt werden. Unter einer "Energiequelle" soll insbesondere eine elektrische Energiequelle, vorzugsweise eine Wechselspannungsquelle, insbesondere eine Phase eines Mehrphasenhausanschlusses, verstanden werden. Insbesondere weist die Induktionsheizvorrichtung zumindest zwei Anschlussstellen auf, die dazu vorgesehen sind, mit Energiequellen verbunden zu werden. Unter einer "Schalteinheit" soll insbesondere eine Einheit mit zumindest einem Schaltelement verstanden werden. Unter einem "Schaltelement" soll insbesondere eine elektrische, vorzugsweise passive, Komponente verstanden werden, die dazu vorgesehen ist, zumindest eine elektrische Verbindung zu trennen und/oder zu verbinden. Insbesondere weist ein Schaltelement zumindest einen Steuereingang auf und ist dazu vorgesehen, in Abhängigkeit von einem, an dem Steuereingang anliegenden elektrischen Signal zu schalten. Insbesondere ist das Schaltelement als Halbleiterbauteil, vorzugsweise als Relais ausgebildet. Unter "vorgesehen" soll insbesondere speziell programmiert, ausgelegt und/oder ausgestattet verstanden werden. Es kann insbesondere eine erhöhte elektrische Effizienz erreicht werden, da Verluste in den Gleichrichtereinheiten, insbesondere in Halbleiterbauteilen der Gleichrichtereinheiten, überproportional mit einem über die Gleichrichtereinheiten fließenden Strom ansteigen.It is proposed that the induction heating device has at least one first switching unit which is provided to connect at least the two heating frequency units in at least one operating mode to a single one of the at least two energy sources. A "heating frequency unit" should in particular be understood to mean an electrical unit which generates an oscillating electrical signal, preferably at a frequency of at least 1 kHz, in particular of at least 10 kHz, advantageously of at least 20 kHz, and in particular of not more than 100 kHz for an induction heating unit , In particular, the heating frequency unit is intended to provide a maximum electrical power of at least 1000 W, in particular at least 2000 W, advantageously at least 3000 W and preferably at least 3500 W, required by an induction heating unit. In particular, the heating frequency unit comprises at least one inverter, which preferably has at least two, preferably in series, bidirectional unipolar switches, which are formed in particular by a transistor and a diode connected in parallel, and particularly advantageous at least in each case one parallel to the bidirectional unipolar switches switched damping capacity, which is in particular formed by at least one capacitor. As a result, a high-frequency power supply of the induction heating unit can be provided. An "energy source" is to be understood in particular as meaning an electrical energy source, preferably an alternating voltage source, in particular a phase of a multi-phase house connection. In particular, the induction heating device has at least two connection points, which are intended to be connected to energy sources. A "switching unit" is to be understood in particular as a unit having at least one switching element. A "switching element" is to be understood as meaning, in particular, an electrical, preferably passive, component which is provided to disconnect and / or connect at least one electrical connection. In particular, a switching element has at least one control input and is provided to switch in dependence on a, applied to the control input electrical signal. In particular, the switching element is designed as a semiconductor component, preferably as a relay. By "provided" is intended to be understood in particular specially programmed, designed and / or equipped. In particular, an increased electrical efficiency can be achieved since losses in the rectifier units, in particular in semiconductor components of the rectifier units, increase disproportionately with a current flowing through the rectifier units.

Vorzugsweise weist die Induktionsheizvorrichtung zumindest zwei Induktionsheizeinheiten auf, die dazu vorgesehen sind, in zumindest einem Betriebsmodus von jeweils unterschiedlichen der zumindest zwei Heizfrequenzeinheiten betrieben zu werden. Unter einer "Induktionsheizeinheit" soll insbesondere eine Einheit verstanden werden, die zumindest ein Induktionsheizelement aufweist. Unter einem "Induktionsheizelement" soll insbesondere ein Heizelement verstanden werden, das dazu vorgesehen ist, einen hochfrequenten Wechselstrom, insbesondere einen Wechselstrom mit einer Frequenz zwischen 20 kHz und 100 kHz, in ein magnetisches Wechselfeld zu wandeln, welches durch Induktion und/oder Ummagnetisierungseffekte in einem metallischen, insbesondere ferromagnetischen, Körper, insbesondere in einem Heizkörper und/oder einem Gargeschirr, Wärme erzeugt. Insbesondere weist ein Induktionsheizelement zumindest einen gewickelten, insbesondere kreisscheibenförmig gewickelten, Leiter auf. Es kann insbesondere ein erhöhter Komfort erreicht werden.Preferably, the induction heating device has at least two induction heating units, which are intended to be operated in at least one operating mode of respectively different ones of the at least two heating frequency units. An "induction heating unit" is to be understood in particular as meaning a unit which has at least one induction heating element. An "induction heating element" should in particular be understood to mean a heating element which is intended to convert a high-frequency alternating current, in particular an alternating current having a frequency between 20 kHz and 100 kHz, into an alternating magnetic field which is induced by induction and / or magnetic reversal effects metallic, in particular ferromagnetic, body, in particular in a radiator and / or a cooking utensil, generates heat. In particular, an induction heating element has at least a wound, in particular circular disk wound conductor. In particular, increased comfort can be achieved.

Weiterhin wird vorgeschlagen, dass die Induktionsheizvorrichtung zumindest eine zweite Schalteinheit aufweist, die dazu vorgesehen ist, in zumindest einem Betriebsmodus einen gleichzeitigen Betrieb zumindest einer der Induktionsheizeinheiten mit zumindest zwei Heizfrequenzeinheiten zu ermöglichen. Es kann insbesondere eine erhöhte elektrische Effizienz erreicht werden.Furthermore, it is proposed that the induction heating device has at least one second switching unit which is provided to allow simultaneous operation of at least one of the induction heating units with at least two heating frequency units in at least one operating mode. In particular, an increased electrical efficiency can be achieved.

Vorteilhaft weist die Induktionsheizvorrichtung zumindest zwei Gleichrichtereinheiten auf, mit denen in zumindest einem Betriebsmodus jeweils unterschiedliche der zumindest zwei Heizfrequenzeinheiten verbunden sind. Unter einer "Gleichrichtereinheit" soll insbesondere eine Einheit verstanden werden, die zumindest einen Gleichrichter aufweist und dazu vorgesehen ist, eine elektrische Wechselspannung, die an Eingangskontakten anliegt, gleichzurichten und an Ausgangskontakten auszugeben. Vorzugsweise weist eine Gleichrichtereinheit zumindest ein Halbleiterbauelement, vorzugsweise eine Diode, auf. Insbesondere weist eine Gleichrichtereinheit zumindest einen Einweggleichrichter, vorzugsweise einen Brückengleichrichter, auf. Weiterhin sind steuerbare Gleichrichter und/oder Boostgleichrichter denkbar. Insbesondere weist die Gleichrichtereinheit eine Pufferkapazität, insbesondere eine Kondensatoreinheit, auf, die dazu vorgesehen ist, eine Glättung der gleichgerichteten Wechselspannung zu erreichen. Vorzugsweise handelt es sich bei einer Ausgangsspannung der Gleichrichtereinheit um eine pulsierende Gleichspannung. Darunter, dass eine Heizfrequenzeinheit mit einer Gleichrichtereinheit "verbunden" ist, soll insbesondere verstanden werden, dass die Heizfrequenzeinheit über einen Strompfad mit der Gleichrichtereinheit verbunden ist, der sich von einem Strompfad unterscheidet, der über mehr als einen Gleichrichter führt. Es kann insbesondere eine erhöhte elektrische Effizienz erreicht werden.Advantageously, the induction heating device has at least two rectifier units with which in at least one operating mode in each case different ones of the at least two heating frequency units are connected. A "rectifier unit" should be understood in particular to mean a unit which has at least one rectifier and is intended to rectify and output an electrical alternating voltage which is applied to input contacts and to output them to output contacts. A rectifier unit preferably has at least one semiconductor component, preferably a diode. In particular, a rectifier unit has at least one half-wave rectifier, preferably a bridge rectifier. Furthermore, controllable rectifiers and / or boost rectifiers are conceivable. In particular, the rectifier unit has a buffer capacity, in particular a capacitor unit, which is provided to achieve a smoothing of the rectified AC voltage. Preferably, an output voltage of the rectifier unit is a pulsating DC voltage. By referring to the fact that a heating frequency unit is "connected" to a rectifier unit, it should be understood in particular that the heating frequency unit is connected via a current path to the rectifier unit, which differs from a current path that leads across more than one rectifier. In particular, an increased electrical efficiency can be achieved.

Weiterhin wird vorgeschlagen, dass die Induktionsheizvorrichtung zumindest eine weitere Schalteinheit aufweist, die dazu vorgesehen ist, in zumindest einem Betriebsmodus zumindest die zwei Gleichrichtereinheiten verbraucherseitig parallel zu schalten. Darunter, dass die Gleichrichtereinheiten "verbraucherseitig" parallel geschaltet sind, soll insbesondere verstanden werden, dass gleichnamige Ausgangskontakte, insbesondere Ausgangskontakte mit gleichpoliger Spannung, der Gleichrichtereinheiten miteinander verbunden sind. Insbesondere ist die weitere Schalteinheit zwischen den Gleichrichtereinheiten und den zumindest zwei Heizfrequenzeinheiten angeordnet. Es kann insbesondere eine erhöhte elektrische Effizienz erreicht werden.Furthermore, it is proposed that the induction heating device has at least one further switching unit which is provided to switch at least the two rectifier units in parallel on the consumer side in at least one operating mode. The fact that the rectifier units are connected in parallel on the consumer side should in particular mean that the output contacts of the same name, in particular output contacts with the same-pole voltage, of the rectifier units are connected to one another are connected. In particular, the further switching unit is arranged between the rectifier units and the at least two heating frequency units. In particular, an increased electrical efficiency can be achieved.

Weiterhin wird vorgeschlagen, dass zumindest die zwei Gleichrichtereinheiten jeweils eine Filtereinheit aufweisen. Unter einer "Filtereinheit" soll insbesondere eine aktive und/oder passive elektronische Einheit verstanden werden, die dazu vorgesehen ist, aus einem Verbraucher in eine Energiequelle, insbesondere ein Stromnetz, rückkoppelnde Spannungsspitzen und/oder netzfremde Frequenzen zu vermeiden. Insbesondere weist die Filtereinheit zumindest eine Drosselspule auf. Es kann insbesondere eine höhere elektrische Effizienz erreicht werden.Furthermore, it is proposed that at least the two rectifier units each have a filter unit. A "filter unit" is to be understood as meaning, in particular, an active and / or passive electronic unit which is intended to prevent a load from being fed into a power source, in particular a power grid, voltage peaks and / or off-grid frequencies. In particular, the filter unit has at least one choke coil. In particular, a higher electrical efficiency can be achieved.

Vorteilhaft weist die Hausgerätevorrichtung zumindest eine Steuereinheit auf, die zumindest in Abhängigkeit von für die Verbraucher angeforderten Leistungen zumindest die erste Schalteinheit steuert. Unter einer "Steuereinheit" soll insbesondere eine elektronische Einheit verstanden werden, die vorzugsweise in einer Steuer- und/oder Regeleinheit einer Hausgerätevorrichtung zumindest teilweise integriert ist und die vorzugsweise dazu vorgesehen ist, zumindest die erste Schalteinheit zu steuern und insbesondere eine Leistungsaufnahme der Verbrauchereinheiten 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. Es kann insbesondere eine höhere elektrische Effizienz erreicht werden.Advantageously, the domestic appliance device has at least one control unit which controls at least the first switching unit at least as a function of services requested for the consumers. A "control unit" is to be understood in particular as meaning an electronic unit which is preferably at least partially integrated in a control and / or regulating unit of a home appliance device and which is preferably provided to control at least the first switching unit and in particular to control a power consumption of the consumer units and / or to regulate. 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, a higher electrical efficiency 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.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.

Figur 1 zeigt ein als Kochfeld ausgebildetes Hausgerät 10 in einer schematischen Ansicht. Das Hausgerät 10 weist eine als Induktionskochfeldvorrichtung ausgebildete Induktionsheizvorrichtung 12 auf. Die Induktionsheizvorrichtung 12 weist zwei Heizfrequenzeinheiten 30, 32 auf, die dazu vorgesehen sind, mit unterschiedlichen Energiequellen 14, 16 verbunden zu werden. Die Heizfrequenzeinheiten 30, 32 sind als Wechselrichter ausgebildet. Die Induktionsheizvorrichtung 12 weist eine erste Schalteinheit 40 auf, die dazu vorgesehen ist, in einem Betriebsmodus die zwei Heizfrequenzeinheiten 30, 32 mit einer einzelnen Energiequelle 14, 16 zu verbinden. Weiterhin weist die Induktionsheizvorrichtung 12 zwei Induktionsheizeinheiten 34, 36 auf, die dazu vorgesehen sind, in einem Betriebsmodus von jeweils unterschiedlichen der zwei Heizfrequenzeinheiten 30, 32 betrieben zu werden. Weiterhin weist die Induktionsheizvorrichtung 12 eine zweite Schalteinheit 60 auf, die dazu vorgesehen ist, in einem Betriebsmodus einen gleichzeitigen Betrieb einer der Induktionsheizeinheiten 34, 36 mit den zwei Heizfrequenzeinheiten 30, 32 zu ermöglichen. Weiterhin weist die Induktionsheizvorrichtung 12 zwei Gleichrichtereinheiten 20, 22 auf, mit denen in einem Betriebsmodus jeweils unterschiedliche der zwei Heizfrequenzeinheiten 30, 32 verbunden sind. Weiterhin weist die Induktionsheizvorrichtung 12 eine weitere Schalteinheit 50 auf, die dazu vorgesehen ist, in einem Betriebsmodus die zwei Gleichrichtereinheiten 20, 22 verbraucherseitig parallel zu schalten. FIG. 1 shows a designed as a hob home appliance 10 in a schematic view. The domestic appliance 10 has an induction heating device 12 designed as an induction hob device. The induction heating device 12 has two heating frequency units 30, 32, which are intended to be connected to different energy sources 14, 16. The heating frequency units 30, 32 are designed as inverters. The induction heating device 12 has a first switching unit 40, which is provided to connect the two heating-frequency units 30, 32 to a single energy source 14, 16 in one operating mode. Furthermore, the induction heating device 12 has two induction heating units 34, 36, which are intended to be operated in an operating mode of respectively different ones of the two heating-frequency units 30, 32. Furthermore, the induction heating device 12 has a second switching unit 60, which is provided to allow simultaneous operation of one of the induction heating units 34, 36 with the two heating frequency units 30, 32 in one operating mode. Furthermore, the induction heating device 12 has two rectifier units 20, 22, to which in each case different of the two heating-frequency units 30, 32 are connected in one operating mode. Furthermore, the induction heating device 12 has a further switching unit 50, which is provided to switch the two rectifier units 20, 22 on the consumer side in parallel in an operating mode.

Die zwei Gleichrichtereinheiten 20, 22 weisen jeweils eine Filtereinheit 24, 26 auf. Die zwei Gleichrichtereinheiten 20, 22 weisen jeweils einen als Brückengleichrichter ausgebildeten Gleichrichter 21, 23 auf. Weiterhin weist die Induktionsheizvorrichtung 12 eine Steuereinheit 70 auf, die in Abhängigkeit von für die Induktionsheizeinheiten 34, 36 angeforderten Leistungen die zweite und die erste Schalteinheit 40, 60 steuert. Weiterhin ist die Steuereinheit 70 dazu vorgesehen, die weitere Schalteinheit 50 zu steuern. Weiterhin ist die Steuereinheit 70 dazu vorgesehen, die Heizfrequenzeinheiten 30, 32 und somit eine Leistungsaufnahme der Induktionsheizeinheiten 34, 36 zu steuern. Die Energiequellen 14, 16 sind als Phasen eines Mehrphasenhausanschlusses ausgebildet. Die Induktionsheizvorrichtung 12 weist ein Stellmittel 72 auf, das dazu vorgesehen ist, einem Bediener eine Einstellung einer maximal über die Energiequellen 14, 16 zu beziehenden Stromstärke zu ermöglichen. Die erste Schalteinheit 40 weist zwei Schaltelemente 42, 44 auf. Die Schaltelemente 42, 44 sind als Relais ausgebildet. Die Schaltelemente 42, 44 sind als einpolige Wechselschalter ausgebildet. Die erste Schalteinheit 40 ist dazu vorgesehen, die Gleichrichtereinheit 20 entweder mit der Energiequelle 14 oder der Energiequelle 16 zu verbinden. In einem Ausgangszustand verbindet die erste Schalteinheit 40 die Gleichrichtereinheit 20 mit der Energiequelle 14 und die Gleichrichtereinheit 22 mit der Energiequelle 16. Die zweite Schalteinheit 60 weist zwei Schaltelemente 62, 64 auf. Die Schaltelemente 62, 64 sind als Relais ausgebildet. Die Schaltelemente 62, 64 sind als einpolige Wechselschalter ausgebildet. Die zweite Schalteinheit 60 ist dazu vorgesehen, die Induktionsheizeinheiten 34, 36 entweder jeweils mit einer der Heizfrequenzeinheiten 30, 32 zu verbinden oder eine der Induktionsheizeinheiten 34, 36 mit beiden Heizfrequenzeinheiten 30, 32 in einem Boostmodus zu betreiben. In dem Ausgangszustand verbindet die zweite Schalteinheit 60 die Induktionsheizeinheit 34 mit der Heizfrequenzeinheit 30 und die Induktionsheizeinheit 36 mit der Heizfrequenzeinheit 32. Die weitere Schalteinheit 50 weist zwei Schaltelemente 52, 54 auf. Die Schaltelemente 52, 54 sind als Relais ausgebildet. Die Schaltelemente 52, 54 sind als einpolige Einschalter ausgebildet. In dem Ausgangszustand ist eine Verbindung von Ausgangskontakten der Gleichrichtereinheiten 20, 22 über die Schaltelemente 52, 54 getrennt. In weiteren Ausgestaltungsvarianten ist es ebenso denkbar, dass die Schaltelemente 42 und 44 paarweise als zweipolige Wechselschalter ausgebildet sind und somit über ein einzelnes Steuerglied, insbesondere eine Relaisspule, schaltbar sind. In weiteren Ausgestaltungsvarianten ist es weiterhin denkbar, dass die Schaltelemente 52 und 54 paarweise als zweipolige Einschalter ausgebildet sind und somit über ein einzelnes Steuerglied, insbesondere eine Relaisspule, schaltbar sind.The two rectifier units 20, 22 each have a filter unit 24, 26. The two rectifier units 20, 22 each have a rectifier 21, 23 configured as a bridge rectifier. Furthermore, the induction heating device 12 has a control unit 70, which controls the second and the first switching unit 40, 60 as a function of the powers required for the induction heating units 34, 36. Furthermore, the control unit 70 is provided to control the further switching unit 50. Furthermore, the control unit 70 is provided to control the heating frequency units 30, 32 and thus a power consumption of the induction heating units 34, 36. The energy sources 14, 16 are designed as phases of a multi-phase house connection. The induction heating device 12 has an adjusting means 72, which is provided to allow an operator to set a maximum of the power sources 14, 16 to be related current. The first switching unit 40 has two switching elements 42, 44. The switching elements 42, 44 are designed as relays. The switching elements 42, 44 are formed as a single pole changeover switch. The first switching unit 40 is provided to the rectifier unit 20 either with the Energy source 14 or the power source 16 to connect. In an initial state, the first switching unit 40 connects the rectifier unit 20 to the power source 14 and the rectifier unit 22 to the power source 16. The second switching unit 60 has two switching elements 62, 64. The switching elements 62, 64 are designed as relays. The switching elements 62, 64 are formed as a single pole changeover switch. The second switching unit 60 is provided to either connect the induction heating units 34, 36 respectively to one of the heating frequency units 30, 32 or to operate one of the induction heating units 34, 36 with both heating frequency units 30, 32 in a boost mode. In the initial state, the second switching unit 60 connects the induction heating unit 34 with the heating frequency unit 30 and the induction heating unit 36 with the heating frequency unit 32. The further switching unit 50 has two switching elements 52, 54. The switching elements 52, 54 are designed as relays. The switching elements 52, 54 are designed as a single-pole power switch. In the initial state, a connection of output contacts of the rectifier units 20, 22 via the switching elements 52, 54 is disconnected. In further embodiments, it is also conceivable that the switching elements 42 and 44 are formed in pairs as a two-pole changeover switch and thus via a single control member, in particular a relay coil, are switchable. In further embodiments, it is further conceivable that the switching elements 52 and 54 are formed in pairs as a two-pole power switch and thus via a single control member, in particular a relay coil, are switchable.

In einem ersten Betriebsmodus, in dem für die Induktionsheizeinheiten 34, 36 von einem Bediener Leistungen angefordert sind, die in Summe größer sind als eine Leistung, die von einer einzelnen Energiequelle 14, 16 maximal bezogen werden dürfen, ist die Steuereinheit 70 dazu vorgesehen, die Schalteinheiten 40, 50, 60 in ihren jeweiligen Ausgangszuständen zu belassen. Die Induktionsheizeinheiten 34, 36 werden über komplett verschiedene Leistungselektronik betrieben.In a first mode of operation in which the inductive heating units 34, 36 are required by a user to provide outputs which are greater in total than a power which may be obtained by a maximum of a single energy source 14, 16, the control unit 70 is provided for Switching units 40, 50, 60 to be left in their respective initial states. The induction heating units 34, 36 are operated via completely different power electronics.

In einem zweiten Betriebsmodus, in dem für die Induktionsheizeinheiten 34, 36 von einem Bediener Leistungen angefordert sind, die in Summe maximal einer Leistung entsprechen, die von der einzelnen Energiequelle 16 maximal bezogen werden darf, ist die Steuereinheit 70 dazu vorgesehen, die Schalteinheit 60 in ihrem Ausgangszustand zu belassen und die Schalteinheiten 40 und 50 zu schalten. In diesem Betriebsmodus sind beide Gleichrichtereinheiten 20, 22 mit der Energiequelle 16 verbunden und die Gleichrichtereinheiten 20, 22 sind verbraucherseitig parallel geschaltet. Die Induktionsheizeinheiten 34, 36 werden jeweils über zwei Gleichrichtereinheiten 20, 22 betrieben.In a second operating mode, in which an operator requests powers for the induction heating units 34, 36 which in total correspond to a maximum of a power which may be obtained from the individual power source 16 to the maximum, the control unit 70 is provided to power the switching unit 60 in FIG leave their initial state and the switching units 40 and 50 to switch. In this operating mode, both rectifier units 20, 22 are connected to the power source 16 and the rectifier units 20, 22 are connected in parallel on the consumer side. The Induction heating units 34, 36 are each operated via two rectifier units 20, 22.

In einem dritten Betriebsmodus, in dem für mindestens eine und für weniger als alle Induktionsheizeinheiten 34, 36, also beispielsweise, wie in Figur 1 dargestellt, nur für die Induktionsheizeinheit 34, eine Leistung durch einen Bediener angefordert ist, ist die Steuereinheit 70 dazu vorgesehen, alle Schalteinheiten 40, 50, 60 zu schalten. Es sind beide Gleichrichtereinheiten 20, 22 mit der Energiequelle 16 verbunden, die Gleichrichtereinheiten 20, 22 sind verbraucherseitig parallel geschaltet und die Induktionsheizeinheit 34 ist mit beiden Gleichrichtereinheiten 20, 22 verbunden.In a third mode of operation, in which for at least one and for less than all induction heating units 34, 36, that is, for example, as in FIG FIG. 1 shown, only for the induction heating unit 34, a power is requested by an operator, the control unit 70 is provided to switch all the switching units 40, 50, 60. Both rectifier units 20, 22 are connected to the energy source 16, the rectifier units 20, 22 are connected in parallel on the consumer side, and the induction heating unit 34 is connected to both rectifier units 20, 22.

Weiterhin sind Betriebsmodi, die den zweiten und dritten Betriebsmodus kombinieren, denkbar, in denen die Induktionsheizeinheiten 34, 36 abwechselnd durch Schaltung der Schalteinheit 60 in einem Boostmodus betrieben werden.Furthermore, operating modes which combine the second and third operating modes are conceivable in which the induction heating units 34, 36 are operated alternately by switching the switching unit 60 in a boost mode.

Es sind weiterhin Ausgestaltungen der Erfindung mit mehr als zwei, insbesondere zumindest drei, vorteilhaft zumindest vier, Induktionsheizeinheiten, Gleichrichtereinheiten und/oder Heizfrequenzeinheiten denkbar. Insbesondere weist eine derartige Ausgestaltung komplexere, den größeren Anzahlen angepasste Schalteinheiten auf.Furthermore, embodiments of the invention with more than two, in particular at least three, advantageously at least four, induction heating units, rectifier units and / or heating frequency units are conceivable. In particular, such a configuration has more complex switching units adapted to the larger numbers.

Weiterhin ist es denkbar, dass die Steuereinheit 70 dazu vorgesehen ist, die Schalteinheit 40 ständig zu schließen, wenn lediglich eine Energiequelle 16 an die Induktionsheizvorrichtung 12 angeschlossen ist.Furthermore, it is conceivable that the control unit 70 is provided to close the switching unit 40 constantly when only one power source 16 is connected to the induction heating device 12.

Bezugszeichenreference numeral

1010
Hausgeräthousehold appliance
1212
Induktionsheizvorrichtunginduction heating
1414
Energiequelleenergy
1616
Energiequelleenergy
2020
GleichrichtereinheitRectifier unit
2121
Gleichrichterrectifier
2222
GleichrichtereinheitRectifier unit
2323
Gleichrichterrectifier
2424
Filtereinheitfilter unit
2626
Filtereinheitfilter unit
3030
HeizfrequenzeinheitHeizfrequenzeinheit
3232
HeizfrequenzeinheitHeizfrequenzeinheit
3434
Induktionsheizeinheitinduction heating
3636
Induktionsheizeinheitinduction heating
4040
Schalteinheitswitching unit
4242
Schaltelementswitching element
4444
Schaltelementswitching element
5050
Schalteinheitswitching unit
5252
Schaltelementswitching element
5454
Schaltelementswitching element
6060
Schalteinheitswitching unit
6262
Schaltelementswitching element
6464
Schaltelementswitching element
7070
Steuereinheitcontrol unit
7272
Stellmittelactuating means

Claims (9)

  1. Induction heating apparatus, in particular induction hob apparatus, having at least two heat frequency units (30, 32), which each have at least one inverter and are provided to be connected to different energy sources (14, 16), characterised by at least one first switching unit (40), which is provided to connect at least the two heat frequency units (30, 32) with one of the at least two energy sources (14, 16) in at least one operating mode.
  2. Induction heating apparatus according to one of the preceding claims, characterised by at least two induction heating units (34, 36), which are provided to be operated in at least one operating mode by in each case various of the at least two heat frequency units (30, 32).
  3. Induction heating apparatus according to claim 2, characterised by at least one second switching unit (60), which is provided to allow for simultaneous operation of at least one of the induction heating units (34, 36) with at least two heat frequency units (30, 32) in at least one operating mode.
  4. Induction heating apparatus according to one of the preceding claims, characterised by at least two rectifier units (20, 22), with which in each case various of the at least two heat frequency units (30, 32) are connected in at least one operating mode.
  5. Induction heating apparatus according to claim 4, characterised by at least one further switching unit (50), which is provided to switch at least the two rectifier units (20, 22) on the load side in parallel in at least one operating mode.
  6. Induction heating apparatus at least according to claim 4, characterised in that at least the two inverter units (20, 22) each have a filter unit (24, 26).
  7. Induction heating apparatus according to one of the preceding claims, characterised by a control unit (70), which controls at least the first switching unit (40) at least as a function of outputs required for the loads.
  8. Household appliance, in particular induction hob, having an induction heating apparatus (12) as claimed in one of the preceding claims,
  9. Method for operating an induction heating apparatus (12) as claimed in claim 7.
EP12806669.3A 2011-11-04 2012-10-30 Induction heating apparatus Active EP2774456B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES201131770 2011-11-04
PCT/IB2012/055996 WO2013064968A2 (en) 2011-11-04 2012-10-30 Induction heating apparatus

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Publication Number Publication Date
EP2774456A2 EP2774456A2 (en) 2014-09-10
EP2774456B1 true EP2774456B1 (en) 2018-12-12

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CN (1) CN103891400B (en)
WO (1) WO2013064968A2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013080088A2 (en) * 2011-11-28 2013-06-06 BSH Bosch und Siemens Hausgeräte GmbH Induction heating apparatus
KR102508227B1 (en) 2018-05-29 2023-03-09 삼성전자주식회사 Cooking apparatus and control method thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2323837B1 (en) * 2007-06-21 2010-05-25 Bsh Electrodomesticos España, S.A. COOKING DEVICE CIRCUIT AND PROCEDURE FOR THE WARMING OF AN OBJECT.
ES2352772B1 (en) * 2008-12-19 2012-01-26 Bsh Electrodomésticos España, S.A. COOKING FIELD WITH VARIOUS HEATING ELEMENTS AND AT LEAST A CONSTRUCTION GROUP OF POWER ELECTRONICS.
FR2954661A1 (en) * 2009-12-23 2011-06-24 Jaeger INDUCERS ON BALANCED PHASES
ES2384919B1 (en) * 2009-12-28 2013-05-20 Bsh Electrodomésticos España, S.A. COOKING DEVICE DEVICE.

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Also Published As

Publication number Publication date
CN103891400A (en) 2014-06-25
WO2013064968A3 (en) 2013-12-19
WO2013064968A2 (en) 2013-05-10
EP2774456A2 (en) 2014-09-10
CN103891400B (en) 2016-03-30

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