EP2786637A2 - Induction heating apparatus - Google Patents

Induction heating apparatus

Info

Publication number
EP2786637A2
EP2786637A2 EP12815785.6A EP12815785A EP2786637A2 EP 2786637 A2 EP2786637 A2 EP 2786637A2 EP 12815785 A EP12815785 A EP 12815785A EP 2786637 A2 EP2786637 A2 EP 2786637A2
Authority
EP
European Patent Office
Prior art keywords
induction heating
induction
unit
heating
strands
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.)
Granted
Application number
EP12815785.6A
Other languages
German (de)
French (fr)
Other versions
EP2786637B1 (en
Inventor
Sandra Aranda Vazquez
Carlos CALVO MESTRE
Pablo Jesus HERNANDEZ BLASO
Gil LLORENTE
Maria Elena Moya Albertin
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 Bosch und Siemens Hausgeraete GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP2786637A2 publication Critical patent/EP2786637A2/en
Application granted granted Critical
Publication of EP2786637B1 publication Critical patent/EP2786637B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/06—Control, e.g. of temperature, of power
    • H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
    • H05B6/065—Control, e.g. of temperature, of power for cooking plates or the like using coordinated control of multiple induction coils
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/12—Cooking devices
    • H05B6/1209—Cooking devices induction cooking plates or the like and devices to be used in combination with them
    • H05B6/1245—Cooking devices induction cooking plates or the like and devices to be used in combination with them with special coil arrangements
    • H05B6/1272—Cooking devices induction cooking plates or the like and devices to be used in combination with them with special coil arrangements with more than one coil or coil segment per heating zone

Definitions

  • the invention is based on an induction heating device according to the preamble of claim 1.
  • Induction heaters which comprise an induction heating unit formed by one or more concentrically arranged induction coils.
  • the object of the invention is in particular to provide a generic device with improved properties in terms of miniaturization.
  • the object is achieved by the features of claim 1, while advantageous embodiments and refinements of the invention
  • the invention is based on an induction heating device, in particular a
  • An induction hob apparatus comprising at least one induction heating unit having at least two induction heating conduits intended to be supplied by different heating frequency units.
  • induction heating unit is to be understood in particular as meaning a heating unit which is intended, by induction effects, in particular induction of electrical current and / or remagnetization effects, in a, preferably ferromagnetic, in particular metallic, heating means, in particular in one
  • the induction heating unit is provided to transmit in at least one operating mode in which the induction heating unit is connected to a supply electronics, a power of at least 100 W, in particular at least 500 W, advantageously at least 1000 W, preferably at least 2000 W, in particular electrical energy into electromagnetic field energy, which is finally converted into heat in a suitable heating medium.
  • a power of at least 100 W, in particular at least 500 W, advantageously at least 1000 W, preferably at least 2000 W in particular electrical energy into electromagnetic field energy, which is finally converted into heat in a suitable heating medium.
  • an electrical conduit is understood, which is intended to carry an electric current, which is intended to cause induction effects in a suitable heating means.
  • the induction heating is as
  • Inductance in particular as a coil, advantageously as a flat coil, preferably at least substantially in the form of a circular disc, alternatively in the form of an oval or a rectangle formed.
  • the induction heating in particular with a coupled heating means, an inductance of at least 0, 1 ⁇ , in particular at least 0.3 ⁇ , advantageously at least 1 ⁇ , on.
  • the induction heating in particular with a coupled heating means, an inductance of at least 0, 1 ⁇ , in particular at least 0.3 ⁇ , advantageously at least 1 ⁇ , on.
  • the induction heating in particular with a coupled heating means, an inductance of at least 0, 1 ⁇ , in particular at least 0.3 ⁇ , advantageously at least 1 ⁇ , on.
  • Indutationsloom economically, in particular without a coupled heating means, an inductance of a maximum of 100 mT, in particular a maximum of 10 mT, advantageously a maximum of 1 mT, on.
  • the induction heating is intended to at least in one
  • operating state of high-frequency alternating current in particular an alternating current having a frequency of at least 1 kHz, in particular at least 3 kHz, advantageously at least 10 kHz, preferably at least 20 kHz, in particular at most 100 kHz, in particular with a current of at least 0.5 A, in particular at least 1 A, advantageously at least 3 A, preferably at least 7 A, to be flowed through.
  • a "heating frequency unit” is to be understood as meaning, in particular, an electrical unit which has an oscillating electrical signal, preferably with a frequency of at least 1 kHz, in particular of at least 10 kHz advantageously of at least 20 kHz, and in particular of at most 100 kHz for a
  • the heating frequency unit is provided 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 the induction heating unit.
  • the heating frequency unit comprises in particular at least one inverter, which preferably has at least two, preferably series-connected, bidirectional unipolar switches, which are formed in particular by a transistor and a diode connected in parallel, and particularly advantageously at least one damping capacitor connected in parallel to the bidirectional unipolar switches, which is in particular formed by at least one capacitor. This allows a high-frequency power supply of the
  • Induction heating unit can be provided.
  • the heating frequency units are intended to generate currents which are a have at least substantially the same phase and / or an at least substantially the same frequency.
  • each of the values is not more than 100%, in particular not more than 20%, advantageously not more than 5%, particularly advantageously not more than 1%, preferably not more than 0.3% different from others
  • Indutationscream originallyen formed as spirals run into each other.
  • the induction heating cables are arranged one above the other.
  • a space savings can be achieved with respect to embodiments with concentric, separate induction heating.
  • a high power input can also be achieved for small heating means, in particular garnishes.
  • the different heating frequency units are intended to be connected to different phases of a multi-phase power connection.
  • a "connection" to a phase is to be understood as meaning that the heating frequency unit is connected in such a way that it can draw power from the phase, and in particular a high total power can be achieved.
  • the at least two induction heating cables are each formed by strands of a single stranded conductor.
  • the induction heating cables differ from two parallel-guided stranded conductors.
  • a “stranded conductor” is to be understood in particular as meaning an electrical conductor which is formed by a multiplicity, in particular at least 4, advantageously at least 8, particularly advantageously at least 16, preferably at least 32, individual wires, so-called strands
  • an insulation of the strands is intended to safely shield a voltage of at least 500 V, in particular at least 1000 V, advantageously at least 2000 V, preferably at least 4000 V.
  • the strands of the stranded conductor are preferably encased in a common electrical insulation.
  • the strands of the stranded conductor are twisted together, in particular intertwined.
  • strands of an induction heating line are electrically connected to one another at their ends and thus connected in parallel to one another.
  • the induction heating cables differ from two parallel-guided, in particular twisted, stranded conductors.
  • integers are understood that differ by a maximum of 10, in particular a maximum of 5, advantageously a maximum of 3, preferably a maximum of 1.
  • the proximity effect and / or the skin effect can be counteracted.
  • it may be an efficient radio frequency application
  • Induction heating can be achieved.
  • a low-cost configuration can take place, since only one electrical line has to be formed into an inductance.
  • a redesign of additional components, in particular a coil carrier, or a redesign of manufacturing processes, in particular of the winding process can be dispensed with in comparison to conventional induction heating devices.
  • an insulation of the strands is colored.
  • insulation of the strands is formed by an insulating varnish.
  • a thickness of insulation is the Litzen maximally 100 ⁇ , in particular maximally 50 ⁇ , advantageously maximally 30 ⁇ , preferably maximally 20 ⁇ .
  • a simple assembly and / or production can be achieved.
  • a faulty connection of the strands can be prevented.
  • the induction heating device has a control unit which is provided to associate the at least two induction heating lines of a single or at least two different heating frequency units.
  • a "control unit” is to be understood in particular as meaning a unit which has at least one control unit.
  • Control unit is to be understood in particular to mean an electronic unit which is preferably at least partially integrated in a control and / or regulating unit of an induction heating apparatus and which preferably is provided to control at least the heating frequency 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.
  • the control unit preferably has at least one switching arrangement with at least one switching element, in particular an electromechanical switching element, advantageously a relay, which is provided to assign at least one of the induction heating lines to different heating-frequency units.
  • the at least one switching element is designed as at least one-pole, preferably two-pole, changeover switch.
  • the switching element is provided to produce or disconnect only one connection between one of the induction heating pipes and a heating frequency unit.
  • the control unit is provided to heat the Indutechnischscreamtechnisch in response to a requested for the induction heating unit power, either a heating frequency unit, or more of a same phase
  • control unit is intended, in the case of very high requested powers, to operate the induction heating pipes of different phases. It can
  • the induction heating unit has a diameter which is smaller than 28 cm, in particular smaller than 25 cm, advantageously smaller than 23 cm, preferably smaller than 22 cm. Under a "diameter" of
  • Indutationswarriari should in particular a diameter of the
  • a diameter of the induction heating line corresponds to a diameter of the largest turn of the induction heating conductors.
  • Induction coils a particularly great advantage can be achieved.
  • the induction heating cables are provided to jointly implement a power of at least 3700 W, in particular at least 4000 W, advantageously at least 4300 W.
  • a maximum power that can be shared by the induction heating lines is more than a maximum of a single phase of a multi-phase power
  • Domestic electricity connection may be purchased.
  • a rapid heating of food and / or heating means can be made possible.
  • Fig. 1 shows an inventive hob with an inventive
  • Fig. 2 shows an induction heater according to the invention with a
  • FIG. 3 is a circuit diagram of a circuit according to the invention.
  • FIG. 1 shows a domestic appliance 10 designed as an induction hob.
  • the domestic appliance 10 has an induction heating device 12 designed as an induction hob appliance.
  • the induction heater 12 has five induction heating units 20, 22, 24, 26, 28.
  • the induction heating units 26, 28 are concentric.
  • the induction heating units 26, 28 are concentric.
  • Induction heating unit 20 has a diameter 14 of 21 cm.
  • Induction heating units 22, 24 have a diameter of 24 cm.
  • the induction heating unit 20 has two induction heating pipes 32, 34 which are provided by a first heating frequency unit 42 and a second heating frequency unit 42
  • Heating frequency unit 44 to be supplied ( Figures 2 and 3).
  • the induction heating pipes 32, 34 are arranged together.
  • the induction heating pipes 32, 34 are formed by a stranded wire 30 having 38 strands.
  • the induction heating pipes 32, 34 are each formed by nineteen strands of the stranded wire 30.
  • the strands intended to form different induction heating lines 32, 34 are colored differently.
  • the strands have a diameter of 0.2 mm.
  • Induction heating line 32 are colored blue, while the strands of the second
  • Induction heating 34 are colored red.
  • the strands of the stranded conductor 30 are
  • the strands of the respective Indudictionscream admiren 32, 34 are electrically connected to each other at their corresponding ends and form contacts 52, 53, 54, 55. Contrary to the schematic representation in which the Indu Vietnamesescream admiren 32, 34 are guided in parallel, the strands of the different Indu Vietnamesescream admiren are 32nd , 34 twisted together and intertwined.
  • the contacts 52, 54, and 53, 55 are electrically isolated from each other.
  • the contacts 52, 53 and 54, 55 are conductively connected to each other via the respective induction heating line 32, 34.
  • the Indudictionscream effet 32, 34 are provided, if this is required by an operator via an operating unit of the domestic appliance 10 to implement a power of 4400 W.
  • Induction heater 12 includes electronics assemblies 62, 64.
  • Electronic assemblies 62, 64 have the heating frequency units 42, 44. Furthermore, the electronic assemblies 62, 64 have rectifier components. Furthermore, the electronic assemblies 62, 64 have resonant assemblies formed by capacitors. on, which are intended to form with the Indutechnischscreamtechnischen 32, 34 resonant circuits.
  • the different heating frequency units 42, 44 are via the respective electronic assemblies 62, 64 to different phases 43, 45 of a
  • a control unit 70 which has a control unit 72 and a switching arrangement 74 on.
  • the control unit 70 is provided to individually assign the two induction heating lines 32, 34 of the first heating frequency unit 42 or to assign them to different heating frequency units 42, 44.
  • the switching arrangement 74 has a switching element 75 configured as a two-pole changeover switch.
  • the switching element 75 is designed as a relay.
  • the electronics assembly 64 is intended to be connected to the induction heating unit 22 during operation thereof. If the induction heating unit 22 is not in operation and the induction heating unit 20 is required to have a heating power greater than a heating power that can be supplied by a single phase 43, 45, this is
  • Control unit 70 is provided to switch the switching arrangement 74 such that the induction heating 34 with the electronic assembly 64 and thus with the
  • Heating frequency unit 44 is connected.
  • the control unit 72 is provided to operate the heating frequency units 42, 44 with the same parameters, ie the same frequency, the same phase position, the same dead times, etc. If no heating power is requested for the induction heating unit 22, the control unit 72 is provided for
  • Indutationscream Vogel 34 of the heating frequency unit 44 assign to reduce a load on the first heating frequency unit 42. If powers are required for the induction heating unit 20 under the maximum power available from one phase 43, 45 and the induction heating unit 22 is operating, the control unit 70 is provided to associate the induction heating line 34 with the first heating frequency unit 42 to reduce load on the induction heating line 32 ,
  • the heating frequency units 42, 44 each have an inverter.
  • Heating frequency units 42, 44 connected.
  • the electronic assembly 64 is provided solely as a reserve for the induction heating unit 20 and for the induction heating unit 22 at least one separate electronic assembly is provided. Furthermore, it is conceivable that the induction heating unit 22 is also formed by two induction heating conductors, the are arranged together, and the induction heater 12 is another
  • An electronic assembly with a heating frequency unit which is provided to supply at least one of the induction heating cables, and that the control unit 70 is provided to assign the electronic assembly 64, if necessary, the induction heating unit 22 or the induction heating unit 20. This can be scaled as required in the usual household appliance.
  • a stranded conductor 30 the strands of which have two different colors, is inserted into a spiral groove in a carrier (not shown) and glued to the carrier. The ends of the stranded wire 30 are split open and the strands
  • Matching strands are with a
  • Contact terminal mechanically and electrically connected to contacts 52, 53, 54, 55 with each other.
  • a heating frequency unit has more than two, in particular three, different induction heating lines, which are arranged one next to the other.

Abstract

The invention proceeds from an induction heating apparatus (12), in particular an induction hob apparatus, having at least one induction heating unit (20) which has at least two induction heating lines (32, 34) which are intended to be supplied by different heating frequency units (42, 44). In order to allow for small inductor sizes, the invention proposes that the induction heating lines (32, 34) are arranged next to one another.

Description

Induktionsheizvorrichtung  induction heating
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 Induktionsheizvorrichtungen bekannt, die eine Induktionsheizeinheit aufweisen, die von einer oder mehreren konzentrisch angeordneten Induktionsspulen gebildet sind. Die Aufgabe der Erfindung besteht insbesondere darin, eine gattungsgemäße Vorrichtung mit verbesserten Eigenschaften hinsichtlich einer Miniaturisierbarkeit bereitzustellen. Die Aufgabe wird erfindungsgemäß durch die Merkmale des Patentanspruchs 1 gelöst, während vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung den Induction heaters are known which comprise an induction heating unit formed by one or more concentrically arranged induction coils. The object of the invention is in particular to provide a generic device with improved properties in terms of miniaturization. The object is achieved by the features of claim 1, while advantageous embodiments and refinements of the invention
Unteransprüchen entnommen werden können. Subclaims can be removed.
Die Erfindung geht aus von einer Induktionsheizvorrichtung, insbesondere einer The invention is based on an induction heating device, in particular a
Induktionskochfeldvorrichtung, mit zumindest einer Induktionsheizeinheit, die zumindest zwei Induktionsheizleitungen aufweist, die dazu vorgesehen sind, von unterschiedlichen Heizfrequenzeinheiten versorgt zu werden. An induction hob apparatus, comprising at least one induction heating unit having at least two induction heating conduits intended to be supplied by different heating frequency units.
Es wird vorgeschlagen, dass die Induktionsheizleitungen beieinander angeordnet sind. Unter einer„Induktionsheizeinheit" soll insbesondere eine Heizeinheit verstanden werden, die dazu vorgesehen ist, durch Induktionseffekte, insbesondere Induzierung von elektrischem Strom und/oder Ummagnetisierungseffekten, in einem, vorzugsweise ferromagnetischen, insbesondere metallischen, Heizmittel, insbesondere in einem It is proposed that the induction heating pipes are arranged together. An "induction heating unit" is to be understood in particular as meaning a heating unit which is intended, by induction effects, in particular induction of electrical current and / or remagnetization effects, in a, preferably ferromagnetic, in particular metallic, heating means, in particular in one
Gargeschirr, in einer Backofenwand und/oder in einem Heizkörper, der in einem Backofen angeordnet ist, eine Erwärmung des Heizmittels zu verursachen. Insbesondere ist die Induktionsheizeinheit dazu vorgesehen, in zumindest einem Betriebsmodus, in dem die Induktionsheizeinheit an eine Versorgungselektronik angeschlossen ist, eine Leistung von zumindest 100 W, insbesondere zumindest 500 W, vorteilhaft zumindest 1000 W, vorzugsweise zumindest 2000 W, zu übertragen, insbesondere elektrische Energie in elektromagnetische Feldenergie zu wandeln, die in einem geeigneten Heizmittel letztendlich in Wärme gewandelt wird. Unter einer„Induktionsheizleitung" soll insbesondere eine elektrische Leitung verstanden werden, die dazu vorgesehen ist, einen elektrischen Strom zu führen, der dazu vorgesehen ist, in einem geeigneten Heizmittel Induktionseffekte hervorzurufen. Vorzugsweise ist die Induktionsheizleitung als Garware, in an oven wall and / or in a radiator, which is arranged in an oven to cause heating of the heating medium. In particular, the induction heating unit is provided to transmit in at least one operating mode in which the induction heating unit is connected to a supply electronics, a power of at least 100 W, in particular at least 500 W, advantageously at least 1000 W, preferably at least 2000 W, in particular electrical energy into electromagnetic field energy, which is finally converted into heat in a suitable heating medium. Under an "induction heating" should In particular, an electrical conduit is understood, which is intended to carry an electric current, which is intended to cause induction effects in a suitable heating means. Preferably, the induction heating is as
Induktivität, insbesondere als Spule, vorteilhaft als Flachspule, vorzugsweise zumindest im Wesentlichen in Form einer Kreisscheibe, alternativ in Form eines Ovals oder eines Rechtecks, ausgebildet. Insbesondere weist die Induktionsheizleitung, insbesondere mit einem gekoppelten Heizmittel, eine Induktivität von zumindest 0, 1 μΤ, insbesondere zumindest 0,3 μΤ, vorteilhaft zumindest 1 μΤ, auf. Insbesondere weist die Inductance, in particular as a coil, advantageously as a flat coil, preferably at least substantially in the form of a circular disc, alternatively in the form of an oval or a rectangle formed. In particular, the induction heating, in particular with a coupled heating means, an inductance of at least 0, 1 μΤ, in particular at least 0.3 μΤ, advantageously at least 1 μΤ, on. In particular, the
Induktionsheizleitung, insbesondere ohne ein gekoppeltes Heizmittel, eine Induktivität von maximal 100 mT, insbesondere maximal 10 mT, vorteilhaft maximal 1 mT, auf. Induktionsheizleitung, in particular without a coupled heating means, an inductance of a maximum of 100 mT, in particular a maximum of 10 mT, advantageously a maximum of 1 mT, on.
Vorzugsweise ist die Induktionsheizleitung dazu vorgesehen, zumindest in einem Preferably, the induction heating is intended to at least in one
Betriebszustand von hochfrequentem Wechselstrom, insbesondere einem Wechselstrom mit einer Frequenz von zumindest 1 kHz, insbesondere zumindest 3 kHz, vorteilhaft zumindest 10 kHz, vorzugsweise zumindest 20 kHz, insbesondere maximal 100 kHz, insbesondere mit einer Stromstärke von zumindest 0,5 A, insbesondere zumindest 1 A, vorteilhaft zumindest 3 A, vorzugsweise zumindest 7 A, durchflössen zu werden. Unter „vorgesehen" soll insbesondere speziell programmiert, ausgelegt und/oder ausgestattet verstanden werden. 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 Operating state of high-frequency alternating current, in particular an alternating current having a frequency of at least 1 kHz, in particular at least 3 kHz, advantageously at least 10 kHz, preferably at least 20 kHz, in particular at most 100 kHz, in particular with a current of at least 0.5 A, in particular at least 1 A, advantageously at least 3 A, preferably at least 7 A, to be flowed through. A "heating frequency unit" is to be understood as meaning, in particular, an electrical unit which has an oscillating electrical signal, preferably with a frequency of at least 1 kHz, in particular of at least 10 kHz advantageously of at least 20 kHz, and in particular of at most 100 kHz for a
Induktionsheizeinheit erzeugt. Insbesondere ist die Heizfrequenzeinheit dazu vorgesehen, eine, von der 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 Induced heating unit generates. In particular, the heating frequency unit is provided 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 the induction heating unit. The heating frequency unit comprises in particular at least one inverter, which preferably has at least two, preferably series-connected, bidirectional unipolar switches, which are formed in particular by a transistor and a diode connected in parallel, and particularly advantageously at least one damping capacitor connected in parallel to the bidirectional unipolar switches, which is in particular formed by at least one capacitor. This allows a high-frequency power supply of the
Induktionsheizeinheit bereitgestellt werden. Vorzugsweise sind in einem Betriebszustand, in dem die Induktionsheizleitungen mit unterschiedlichen Heizfrequenzeinheiten betrieben werden, die Heizfrequenzeinheiten dazu vorgesehen, Ströme zu erzeugen, die eine zumindest im Wesentlichen gleiche Phase und/oder eine zumindest im Wesentlichen gleiche Frequenz haben. Darunter, dass zwei Werte zumindest„im Wesentlichen gleich" sind, soll insbesondere verstanden werden, das jeder der Werte maximal 100 %, insbesondere maximal 20 %, vorteilhaft maximal 5 %, besonders vorteilhaft maximal 1 %, vorzugsweise maximal 0,3 %, vom anderen abweicht. Vorzugsweise sind die Induction heating unit can be provided. Preferably, in an operating condition in which the induction heating ducts are operated with different heating frequency units, the heating frequency units are intended to generate currents which are a have at least substantially the same phase and / or an at least substantially the same frequency. Assuming that two values are at least "essentially the same", it should be understood in particular that each of the values is not more than 100%, in particular not more than 20%, advantageously not more than 5%, particularly advantageously not more than 1%, preferably not more than 0.3% different from others
Induktionsheizleiter in ihrer Polarität derart an die Heizfrequenzeinheiten angeschlossen, dass sich durch die Induktionsheizleitungen erzeugte Magnetfelder konstruktiv überlagern. Darunter, dass zwei Induktionsheizleitungen„beieinander" angeordnet sind, soll insbesondere verstanden werden, dass zumindest 30 %, insbesondere zumindest 50 %, vorteilhaft zumindest 70 %, vorzugsweise zumindest 90 %, der Längsanteile jeder der Induktionsheizleitungen maximal 30 mm, insbesondere maximal 10 mm, vorteilhaft maximal 5 mm, vorzugsweise maximal 2 mm von einem beliebigen Längsanteil der jeweils anderen Induktionsheizleitung entfernt sind. Insbesondere sind die  Induktionsheizleiter in its polarity connected to the heating frequency units such that the magnetic fields generated by the Induktionsheizleitungen overlap constructively. It is to be understood, in particular, that at least 30%, in particular at least 50%, advantageously at least 70%, preferably at least 90%, of the longitudinal portions of each of the induction heating pipes is not more than 30 mm, in particular not more than 10 mm, in that two induction heating pipes are arranged "one behind the other". Advantageously, a maximum of 5 mm, preferably a maximum of 2 mm, is removed from any longitudinal portion of the respective other induction heating line
Induktionsheizleitungen zumindest im Wesentlichen parallel geführt. Insbesondere weisen ein Längsanteil einer ersten der Induktionsheizleitungen und ein Längsanteil der anderen Induktionsheizleitung, der dem Längsanteil der ersten der Induktionsheizleitungen am nächsten ist, eine Winkellage zueinander auf, die maximal 20°, insbesondere maximal 10°, vorteilhaft maximal 5°, von 0° abweicht. Insbesondere sind die Induktionsheizleitungen guided at least substantially parallel. In particular, a longitudinal portion of a first of the induction heating and a longitudinal portion of the other induction heating, which is the longitudinal portion of the first of the Induktionsheizleitungen closest, an angular position to each other, the maximum 20 °, in particular at most 10 °, advantageously a maximum of 5 °, deviates from 0 ° , In particular, the
Induktionsheizleitungen als ineinander geführte Spiralen ausgebildet. Alternativ ist es denkbar, dass die Induktionsheizleitungen übereinander angeordnet sind. Es kann insbesondere eine Platzersparnis erreicht werden bezüglich Ausgestaltungen mit konzentrischen, separaten Induktionsheizleitungen. Es kann insbesondere erreicht werden, dass eine ausreichende Anzahl an Windungen Platz findet, um eine für einen Betrieb nötige Induktivität der Induktionsheizleitung zu erreichen. Insbesondere kann auch für kleine Heizmittel, insbesondere Gargeschirre, ein hoher Leistungseintrag erreicht werden. Induktionsheizleitungen formed as spirals run into each other. Alternatively, it is conceivable that the induction heating cables are arranged one above the other. In particular, a space savings can be achieved with respect to embodiments with concentric, separate induction heating. In particular, it can be achieved that a sufficient number of windings can be accommodated in order to achieve an inductance of the induction heating line necessary for operation. In particular, a high power input can also be achieved for small heating means, in particular garnishes.
Weiterhin wird vorgeschlagen, dass die unterschiedlichen Heizfrequenzeinheiten dazu vorgesehen sind, an unterschiedliche Phasen eines Mehrphasenstromanschlusses angebunden zu werden. Unter einer„Anbindung" an eine Phase soll insbesondere verstanden werden, dass die Heizfrequenzeinheit so beschaltet ist, dass sie Leistung von der Phase beziehen kann. Es kann insbesondere eine hohe Gesamtleistung erreicht werden. Ferner wird vorgeschlagen, dass die zumindest zwei Induktionsheizleitungen jeweils von Litzen einer einzelnen Litzenleitung gebildet sind. Insbesondere unterscheiden sich die Induktionsheizleitungen von zwei parallel geführten Litzenleitungen. Unter einer „Litzenleitung" soll insbesondere eine elektrische Leitung verstanden werden, die von einer Vielzahl, insbesondere zumindest 4, vorteilhaft zumindest 8, besonders vorteilhaft zumindest 16, vorzugsweise zumindest 32, einzelnen Drähten, sogenannten Litzen, gebildet sind. Vorzugsweise sind die Litzen der Litzenleitung gegeneinander elektrisch isoliert. Insbesondere ist eine Isolation der Litzen dazu vorgesehen eine Spannung von zumindest 500 V, insbesondere zumindest 1000 V, vorteilhaft zumindest 2000 V, vorzugsweise zumindest 4000 V, sicher abzuschirmen. Vorzugsweise sind die Litzen der Litzenleitung von einer gemeinsamen elektrischen Isolation ummantelt. Vorzugsweise sind die Litzen der Litzenleitung miteinander verdrillt, insbesondere verflochten. Furthermore, it is proposed that the different heating frequency units are intended to be connected to different phases of a multi-phase power connection. In particular, a "connection" to a phase is to be understood as meaning that the heating frequency unit is connected in such a way that it can draw power from the phase, and in particular a high total power can be achieved. It is also proposed that the at least two induction heating cables are each formed by strands of a single stranded conductor. In particular, the induction heating cables differ from two parallel-guided stranded conductors. A "stranded conductor" is to be understood in particular as meaning an electrical conductor which is formed by a multiplicity, in particular at least 4, advantageously at least 8, particularly advantageously at least 16, preferably at least 32, individual wires, so-called strands In particular, an insulation of the strands is intended to safely shield a voltage of at least 500 V, in particular at least 1000 V, advantageously at least 2000 V, preferably at least 4000 V. The strands of the stranded conductor are preferably encased in a common electrical insulation. Preferably, the strands of the stranded conductor are twisted together, in particular intertwined.
Vorzugsweise sind Litzen einer Induktionsheizleitung an ihren Enden miteinander elektrisch verbunden und damit einander parallel geschaltet. Insbesondere unterscheiden sich die Induktionsheizleitungen von zwei parallel geführten, insbesondere miteinander verdrillten, Litzenleitungen. Insbesondere weisen die zumindest zwei Preferably, strands of an induction heating line are electrically connected to one another at their ends and thus connected in parallel to one another. In particular, the induction heating cables differ from two parallel-guided, in particular twisted, stranded conductors. In particular, the at least two
Induktionsheizleitungen eine im Wesentlichen gleiche Anzahl von Litzen auf, wodurch eine im Wesentlichen gleiche Belastbarkeit der unterschiedlichen Induktionsheizleitungen erreicht werden kann. Unter zwei„im Wesentlichen gleichen" Anzahlen sollen Induktionsheizleitungen a substantially equal number of strands, whereby a substantially equal load capacity of the different induction heating can be achieved. Under two "substantially equal" numbers are intended
insbesondere ganze Zahlen verstanden werden, die sich um maximal 10, insbesondere maximal 5, vorteilhaft maximal 3, vorzugsweise maximal 1 , unterscheiden. Insbesondere kann dem Proximity-Effekt und/oder dem Skin-Effekt entgegengewirkt werden. Es kann insbesondere eine effiziente, für Hochfrequenzanwendung geeignete In particular, integers are understood that differ by a maximum of 10, in particular a maximum of 5, advantageously a maximum of 3, preferably a maximum of 1. In particular, the proximity effect and / or the skin effect can be counteracted. In particular, it may be an efficient radio frequency application
Induktionsheizleitung erreicht werden. Insbesondere kann eine preiswerte Ausgestaltung erfolgen, da lediglich eine elektrische Leitung zu einer Induktivität ausgebildet werden muss. Insbesondere kann auf eine Umgestaltung zusätzlicher Bauteile, insbesondere eines Spulenträgers, oder einer Umgestaltung von Herstellungsprozessen, insbesondere des Windungsprozesses, im Vergleich zu herkömmlichen Induktionsheizvorrichtungen verzichtet werden. Induction heating can be achieved. In particular, a low-cost configuration can take place, since only one electrical line has to be formed into an inductance. In particular, a redesign of additional components, in particular a coil carrier, or a redesign of manufacturing processes, in particular of the winding process, can be dispensed with in comparison to conventional induction heating devices.
Weiterhin wird vorgeschlagen, dass die Litzen, die dazu vorgesehen sind, Furthermore, it is proposed that the strands intended
unterschiedliche Induktionsheizleitungen zu bilden, unterschiedlich gefärbt sind. to form different Induktionsheizleitungen are colored differently.
Insbesondere ist eine Isolierung der Litzen eingefärbt. Insbesondere ist eine Isolierung der Litzen von einem Isolierlack gebildet. Insbesondere beträgt eine Dicke einer Isolierung der Litzen maximal 100 μηη, insbesondere maximal 50 μηη, vorteilhaft maximal 30 μηη, vorzugsweise maximal 20 μηη. Insbesondere kann eine einfache Montage und/oder Produktion erreicht werden. Insbesondere kann einer fehlerhaften Verbindung der Litzen vorgebeugt werden. In particular, an insulation of the strands is colored. In particular, insulation of the strands is formed by an insulating varnish. In particular, a thickness of insulation is the Litzen maximally 100 μηη, in particular maximally 50 μηη, advantageously maximally 30 μηη, preferably maximally 20 μηη. In particular, a simple assembly and / or production can be achieved. In particular, a faulty connection of the strands can be prevented.
Vorteilhaft wird vorgeschlagen, dass die Induktionsheizvorrichtung eine Kontrolleinheit aufweist, die dazu vorgesehen ist, die zumindest zwei Induktionsheizleitungen einer einzelnen oder zumindest zwei unterschiedlichen Heizfrequenzeinheiten zuzuordnen. Unter einer„Kontrolleinheit" soll insbesondere eine Einheit verstanden werden, die zumindest eine Steuereinheit aufweist. Unter einer„Steuereinheit" soll insbesondere eine elektronische Einheit verstanden werden, die vorzugsweise in einer Steuer- und/oder Regeleinheit einer Induktionsheizvorrichtung zumindest teilweise integriert ist und die vorzugsweise dazu vorgesehen ist, zumindest die Heizfrequenzeinheiten 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. Vorzugsweise weist die Kontrolleinheit zumindest eine Schaltanordnung mit zumindest einem Schaltelement, insbesondere einem elektromechanischen Schaltelement, vorteilhaft einem Relais, auf, dass dazu vorgesehen ist, zumindest eine der Induktionsheizleitungen unterschiedlichen Heizfrequenzeinheiten zuzuordnen. Vorzugsweise ist das zumindest eine Schaltelement als zumindest einpoliger, vorteilhaft zweipoliger, Umschalter ausgebildet. Alternativ ist es denkbar, dass das Schaltelement dazu vorgesehen ist, lediglich eine Verbindung zwischen einer der Induktionsheizleitungen und einer Heizfrequenzeinheit herzustellen oder zu trennen. Insbesondere ist die Kontrolleinheit dazu vorgesehen, die Induktionsheizleitungen in Abhängigkeit von einer für die Induktionsheizeinheit angeforderten Leistung, entweder einer Heizfrequenzeinheit, bzw. mehreren von einer gleichen Phase betriebenen It is advantageously proposed that the induction heating device has a control unit which is provided to associate the at least two induction heating lines of a single or at least two different heating frequency units. A "control unit" is to be understood in particular as meaning a unit which has at least one control unit. "Control unit" is to be understood in particular to mean an electronic unit which is preferably at least partially integrated in a control and / or regulating unit of an induction heating apparatus and which preferably is provided to control at least the heating frequency 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. The control unit preferably has at least one switching arrangement with at least one switching element, in particular an electromechanical switching element, advantageously a relay, which is provided to assign at least one of the induction heating lines to different heating-frequency units. Preferably, the at least one switching element is designed as at least one-pole, preferably two-pole, changeover switch. Alternatively, it is conceivable that the switching element is provided to produce or disconnect only one connection between one of the induction heating pipes and a heating frequency unit. In particular, the control unit is provided to heat the Induktionsheizleitungen in response to a requested for the induction heating unit power, either a heating frequency unit, or more of a same phase
Heizfrequenzeinheiten, oder unterschiedlichen Heizfrequenzeinheiten, bzw. von unterschiedlichen Phasen betriebenen Heizfrequenzeinheiten, zuzuordnen. Insbesondere ist die Kontrolleinheit dazu vorgesehen, im Falle sehr hoher angeforderter Leistungen, die Induktionsheizleitungen von unterschiedlichen Phasen zu betreiben. Es kann Heizfrequenzeinheiten, or different Heizfrequenzeinheiten, or operated by different phases Heizfrequenzeinheiten assigned. In particular, the control unit is intended, in the case of very high requested powers, to operate the induction heating pipes of different phases. It can
insbesondere eine Belastung der Induktionsheizleitungen, insbesondere im Fall von niedrigen bis hohen Leistungen, reduziert werden. Es kann insbesondere eine hohe Flexibilität erreicht werden. Ferner wird vorgeschlagen, dass die Induktionsheizeinheit einen Durchmesser aufweist, der kleiner ist als 28 cm, insbesondere kleiner ist als 25 cm, vorteilhaft kleiner ist als 23 cm, vorzugsweise kleiner ist als 22 cm. Unter einem„Durchmesser" der In particular, a load on the induction heating, especially in the case of low to high power can be reduced. In particular, a high degree of flexibility can be achieved. It is further proposed that the induction heating unit has a diameter which is smaller than 28 cm, in particular smaller than 25 cm, advantageously smaller than 23 cm, preferably smaller than 22 cm. Under a "diameter" of
Induktionsheizeinheit soll insbesondere ein Durchmesser der von den Induktionsheizeinheit should in particular a diameter of the
Induktionsheizleitern gebildeten Induktivitäten verstanden werden. Insbesondere entspricht ein Durchmesser der Induktionsheizleitung einem Durchmesser der größten Windung der Induktionsheizleiter. Bei einem erfindungsgemäßen Einsatz in einer derart kleinen Induktionsheizeinheit, in der nicht genügend Platz für zwei separate Induktionsheizleiter formed inductors are understood. In particular, a diameter of the induction heating line corresponds to a diameter of the largest turn of the induction heating conductors. In an inventive use in such a small induction heating unit, in the not enough space for two separate
Induktionsspulen ist, kann ein besonders großer Vorteil erreicht werden. Induction coils, a particularly great advantage can be achieved.
Weiterhin wird vorgeschlagen, dass die Induktionsheizleitungen dazu vorgesehen sind, gemeinsam eine Leistung von zumindest 3700 W, insbesondere zumindest 4000 W, vorteilhaft zumindest 4300 W, umzusetzen. Insbesondere beträgt eine maximale Leistung, die gemeinsam von den Induktionsheizleitungen umgesetzt werden kann, mehr als eine Leistung, die maximal von einer einzelnen Phase eines Mehrphasen Furthermore, it is proposed that the induction heating cables are provided to jointly implement a power of at least 3700 W, in particular at least 4000 W, advantageously at least 4300 W. In particular, a maximum power that can be shared by the induction heating lines is more than a maximum of a single phase of a multi-phase power
Hausstromanschlusses bezogen werden darf. Es kann insbesondere eine schnelle Erhitzung von Gargut und/oder Heizmitteln ermöglicht werden. Domestic electricity connection may be purchased. In particular, a rapid heating of food and / or heating means can be made possible.
Weitere Vorteile ergeben sich aus der folgenden Zeichnungsbeschreibung. In der Further advantages emerge from the following description of the drawing. In the
Zeichnung ist ein Ausführungsbeispiel 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. Drawing is an embodiment of the invention 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: Show it:
Fig. 1 ein erfindungsgemäßes Kochfeld mit einer erfindungsgemäßen Fig. 1 shows an inventive hob with an inventive
Induktionsheizvorrichtung in einer schematischen Ansicht von  Induction heater in a schematic view of
oben,  above,
Fig. 2 eine erfindungsgemäße Induktionsheizvorrichtung mit einer  Fig. 2 shows an induction heater according to the invention with a
erfindungsgemäßen Litzenleitung und  Litz wire according to the invention and
Fig. 3 ein Schaltbild einer erfindungsgemäßen Beschaltung. Figur 1 zeigt ein als Induktionskochfeld ausgebildetes Hausgerät 10. Das Hausgerät 10 weist eine als Induktionskochfeldvorrichtung ausgebildete Induktionsheizvorrichtung 12 auf. Die Induktionsheizvorrichtung 12 weist fünf Induktionsheizeinheiten 20, 22, 24, 26, 28 auf. Die Induktionsheizeinheiten 26, 28 sind konzentrisch ausgebildet. Die Fig. 3 is a circuit diagram of a circuit according to the invention. FIG. 1 shows a domestic appliance 10 designed as an induction hob. The domestic appliance 10 has an induction heating device 12 designed as an induction hob appliance. The induction heater 12 has five induction heating units 20, 22, 24, 26, 28. The induction heating units 26, 28 are concentric. The
Induktionsheizeinheit 20 weist einen Durchmesser 14 von 21 cm auf. Die Induction heating unit 20 has a diameter 14 of 21 cm. The
Induktionsheizeinheiten 22, 24 weisen einen Durchmesser von 24 cm auf. Die Induktionsheizeinheit 20 weist zwei Induktionsheizleitungen 32, 34 auf, die dazu vorgesehen sind, von einer ersten Heizfrequenzeinheit 42 und einer zweiten Induction heating units 22, 24 have a diameter of 24 cm. The induction heating unit 20 has two induction heating pipes 32, 34 which are provided by a first heating frequency unit 42 and a second heating frequency unit 42
Heizfrequenzeinheit 44 versorgt zu werden (Figuren 2 und 3). Die Induktionsheizleitungen 32, 34 sind beieinander angeordnet. Die Induktionsheizleitungen 32, 34 sind von einer Litzenleitung 30 mit 38 Litzen gebildet. Die Induktionsheizleitungen 32, 34 sind jeweils von neunzehn Litzen der Litzenleitung 30 gebildet. Die Litzen, die dazu vorgesehen sind, unterschiedliche Induktionsheizleitungen 32, 34 zu bilden, sind unterschiedlich gefärbt. Die Litzen weisen einen Durchmesser von 0,2 mm auf. Die Litzen der ersten Heating frequency unit 44 to be supplied (Figures 2 and 3). The induction heating pipes 32, 34 are arranged together. The induction heating pipes 32, 34 are formed by a stranded wire 30 having 38 strands. The induction heating pipes 32, 34 are each formed by nineteen strands of the stranded wire 30. The strands intended to form different induction heating lines 32, 34 are colored differently. The strands have a diameter of 0.2 mm. The strands of the first
Induktionsheizleitung 32 sind blau gefärbt, während die Litzen der zweiten Induction heating line 32 are colored blue, while the strands of the second
Induktionsheizleitung 34 rot gefärbt sind. Die Litzen der Litzenleitung 30 sind Induction heating 34 are colored red. The strands of the stranded conductor 30 are
gegeneinander mit einem Schutzlack isoliert, der eine Dicke von 10 μηη aufweist und dazu vorgesehen ist, eine Spannung von maximal 2200 V einzuschließen. Die Litzen der jeweiligen Induktionsheizleitungen 32, 34 sind an ihren korrespondierenden Enden miteinander elektrisch verbunden und bilden Kontakte 52, 53, 54, 55. Entgegen der schematischen Darstellung, in der die Induktionsheizleitungen 32, 34 parallel geführt sind, sind die Litzen der unterschiedlichen Induktionsheizleitungen 32, 34 miteinander verdrillt und verflochten. Die Kontakte 52, 54, bzw. 53, 55 sind gegeneinander elektrisch isoliert. Die Kontakte 52, 53 bzw. 54, 55 sind über die jeweilige Induktionsheizleitung 32, 34 leitend miteinander verbunden. Die Induktionsheizleitungen 32, 34 sind dazu vorgesehen, wenn dies von einem Bediener über eine Bedieneinheit der des Hausgeräts 10 angefordert ist, eine Leistung von 4400 W umzusetzen. isolated from each other with a protective lacquer which has a thickness of 10 μηη and is intended to include a maximum voltage of 2200 V. The strands of the respective Induktionsheizleitungen 32, 34 are electrically connected to each other at their corresponding ends and form contacts 52, 53, 54, 55. Contrary to the schematic representation in which the Induktionsheizleitungen 32, 34 are guided in parallel, the strands of the different Induktionsheizleitungen are 32nd , 34 twisted together and intertwined. The contacts 52, 54, and 53, 55 are electrically isolated from each other. The contacts 52, 53 and 54, 55 are conductively connected to each other via the respective induction heating line 32, 34. The Induktionsheizleitungen 32, 34 are provided, if this is required by an operator via an operating unit of the domestic appliance 10 to implement a power of 4400 W.
Die Induktionsheizvorrichtung 12 weist Elektronikbaugruppen 62, 64 auf. Die Induction heater 12 includes electronics assemblies 62, 64. The
Elektronikbaugruppen 62, 64 weisen die Heizfrequenzeinheiten 42, 44 auf. Weiterhin weisen die Elektronikbaugruppen 62, 64 Gleichrichterkomponenten auf. Ferner weisen die Elektronikbaugruppen 62, 64 Resonanzanordnungen, die von Kapazitäten gebildet sind, auf, die dazu vorgesehen sind, mit den Induktionsheizleitungen 32, 34 Schwingkreise zu bilden. Die unterschiedlichen Heizfrequenzeinheiten 42, 44 sind über die jeweiligen Elektronikbaugruppen 62, 64 an unterschiedliche Phasen 43, 45 eines Electronic assemblies 62, 64 have the heating frequency units 42, 44. Furthermore, the electronic assemblies 62, 64 have rectifier components. Furthermore, the electronic assemblies 62, 64 have resonant assemblies formed by capacitors. on, which are intended to form with the Induktionsheizleitungen 32, 34 resonant circuits. The different heating frequency units 42, 44 are via the respective electronic assemblies 62, 64 to different phases 43, 45 of a
Mehrphasenstromanschlusses angebunden. Weiterhin weist die Multi-phase power supply connected. Furthermore, the
Induktionsheizvorrichtung 12 eine Kontrolleinheit 70, die eine Steuereinheit 72 und eine Schaltanordnung 74 aufweist, auf. Die Kontrolleinheit 70 ist dazu vorgesehen, die zwei Induktionsheizleitungen 32, 34 der ersten Heizfrequenzeinheit 42 einzeln zuzuordnen oder unterschiedlichen Heizfrequenzeinheiten 42, 44 zuzuordnen. Die Schaltanordnung 74 weist ein als zweipoliger Umschalter ausgebildetes Schaltelement 75 auf. Das Schaltelement 75 ist als Relais ausgebildet. Nicht detailliert dargestellt ist hier, dass die Elektronikbaugruppe 64 dazu vorgesehen ist, bei einem Betrieb der Induktionsheizeinheit 22 mit dieser verbunden zu werden. Ist die Induktionsheizeinheit 22 nicht in Betrieb und für die Induktionsheizeinheit 20 ist eine Heizleistung angefordert, die größer ist als eine Heizleistung, die von einer einzelnen Phase 43, 45 geliefert werden kann, ist die Induction heater 12, a control unit 70, which has a control unit 72 and a switching arrangement 74 on. The control unit 70 is provided to individually assign the two induction heating lines 32, 34 of the first heating frequency unit 42 or to assign them to different heating frequency units 42, 44. The switching arrangement 74 has a switching element 75 configured as a two-pole changeover switch. The switching element 75 is designed as a relay. Not detailed here is that the electronics assembly 64 is intended to be connected to the induction heating unit 22 during operation thereof. If the induction heating unit 22 is not in operation and the induction heating unit 20 is required to have a heating power greater than a heating power that can be supplied by a single phase 43, 45, this is
Kontrolleinheit 70 dazu vorgesehen, die Schaltanordnung 74 derart zu schalten, dass die Induktionsheizleitung 34 mit der Elektronikbaugruppe 64 und somit mit der Control unit 70 is provided to switch the switching arrangement 74 such that the induction heating 34 with the electronic assembly 64 and thus with the
Heizfrequenzeinheit 44 verbunden ist. Die Steuereinheit 72 ist dazu vorgesehen, die Heizfrequenzeinheiten 42, 44 mit gleichen Parametern, also gleicher Frequenz, gleicher Phasenlage, gleichen Totzeiten usw., zu betreiben. Ist für die Induktionsheizeinheit 22 keine Heizleistung angefordert, ist die Steuereinheit 72 dazu vorgesehen, die Heating frequency unit 44 is connected. The control unit 72 is provided to operate the heating frequency units 42, 44 with the same parameters, ie the same frequency, the same phase position, the same dead times, etc. If no heating power is requested for the induction heating unit 22, the control unit 72 is provided for
Induktionsheizleitung 34 der Heizfrequenzeinheit 44 zuzuordnen, um eine Belastung der ersten Heizfrequenzeinheit 42 zu verringern. Sind für die Induktionsheizeinheit 20 Leistungen unter der maximal von einer Phase 43, 45 lieferbaren Leistung angefordert und die Induktionsheizeinheit 22 ist in Betrieb, ist die Kontrolleinheit 70 dazu vorgesehen, die Induktionsheizleitung 34 der ersten Heizfrequenzeinheit 42 zuzuordnen, um eine Belastung der Induktionsheizleitung 32 zu verringern.  Induktionsheizleitung 34 of the heating frequency unit 44 assign to reduce a load on the first heating frequency unit 42. If powers are required for the induction heating unit 20 under the maximum power available from one phase 43, 45 and the induction heating unit 22 is operating, the control unit 70 is provided to associate the induction heating line 34 with the first heating frequency unit 42 to reduce load on the induction heating line 32 ,
Die Heizfrequenzeinheiten 42, 44 weisen jeweils einen Wechselrichter auf. Die The heating frequency units 42, 44 each have an inverter. The
Induktionsheizleitungen 32, 34 sind in Halbbrückenschaltung an die Induktionsheizleitungen 32, 34 are in half-bridge circuit to the
Heizfrequenzeinheiten 42, 44 angebunden. Heating frequency units 42, 44 connected.
Weiterhin ist denkbar, dass die Elektronikbaugruppe 64 alleinig als Reserve für die Induktionsheizeinheit 20 vorgesehen ist und für die Induktionsheizeinheit 22 zumindest eine separate Elektronikbaugruppe vorgesehen ist. Weiterhin ist es denkbar, dass die Induktionsheizeinheit 22 ebenso von zwei Induktionsheizleitern gebildet ist, die beieinander angeordnet sind, und die Induktionsheizvorrichtung 12 eine weitere Furthermore, it is conceivable that the electronic assembly 64 is provided solely as a reserve for the induction heating unit 20 and for the induction heating unit 22 at least one separate electronic assembly is provided. Furthermore, it is conceivable that the induction heating unit 22 is also formed by two induction heating conductors, the are arranged together, and the induction heater 12 is another
Elektronikbaugruppe mit Heizfrequenzeinheit aufweist, die dazu vorgesehen ist, mindestens eine der Induktionsheizleitungen zu versorgen, und dass die Kontrolleinheit 70 dazu vorgesehen ist, die Elektronikbaugruppe 64 bei Bedarf der Induktionsheizeinheit 22 oder der Induktionsheizeinheit 20 zuzuordnen. Dies kann in hausgeräteüblichem Rahmen beliebig skaliert werden. An electronic assembly with a heating frequency unit, which is provided to supply at least one of the induction heating cables, and that the control unit 70 is provided to assign the electronic assembly 64, if necessary, the induction heating unit 22 or the induction heating unit 20. This can be scaled as required in the usual household appliance.
Bei einer Herstellung der Induktionsheizvorrichtung 12, bzw. der Induktionsheizeinheit 20 wird eine Litzenleitung 30, deren Litzen zwei verschiedene Farben aufweisen, in eine spiralartige Nut in einem Träger (nicht weiter dargestellt) eingelegt und mit dem Träger verklebt. Die Enden der Litzenleitung 30 werden aufgesplissen und die Litzen When manufacturing the induction heating device 12 or the induction heating unit 20, a stranded conductor 30, the strands of which have two different colors, is inserted into a spiral groove in a carrier (not shown) and glued to the carrier. The ends of the stranded wire 30 are split open and the strands
entsprechend ihren Farben sortiert. Zusammengehörige Litzen werden mit einer sorted according to their colors. Matching strands are with a
Kontaktklemme mechanisch und elektrisch zu Kontakten 52, 53, 54, 55 miteinander verbunden. Contact terminal mechanically and electrically connected to contacts 52, 53, 54, 55 with each other.
Es sind weitere dem Fachmann als geeignet erscheinende Markierungsmethoden, insbesondere durch unterschiedliche Muster, für die Litzen denkbar. Weiterhin ist denkbar, dass die Litzen nach Überprüfung eines elektrischen Kontakts zwischen den Enden der Litzenleitung 30 den unterschiedlichen Induktionsheizleitungen 32, 34 zugeordnet werden. Further marking methods which appear suitable to the person skilled in the art are conceivable, in particular by different patterns, for the strands. Furthermore, it is conceivable that the strands are assigned to the different induction heating lines 32, 34 after checking an electrical contact between the ends of the stranded wire 30.
Weiterhin ist es denkbar, dass eine Heizfrequenzeinheit mehr als zwei, insbesondere drei, unterschiedliche Induktionsheizleitungen aufweist, die beieinander angeordnet sind. Ein entsprechender Betrieb von mehr als zwei, insbesondere von drei, Phasen, eine entsprechende Umgestaltung der Schaltung von Figur 3 vorausgesetzt, ist ebenso denkbar. Furthermore, it is conceivable that a heating frequency unit has more than two, in particular three, different induction heating lines, which are arranged one next to the other. A corresponding operation of more than two, in particular of three, phases, a corresponding transformation of the circuit of Figure 3 provided, is also conceivable.
Weiterhin ist es denkbar, erfindungsgemäße Induktionsheizeinheiten mit noch kleineren Durchmessern, beispielsweise 18 cm oder 15 cm, zu gestalten. Bezugszeichen Furthermore, it is conceivable to design induction heating units according to the invention with even smaller diameters, for example 18 cm or 15 cm. reference numeral
10 Hausgerät 10 home appliance
12 Induktionsheizvorrichtung 12 induction heater
14 Durchmesser 14 diameter
20 Induktionsheizeinheit 20 induction heating unit
22 Induktionsheizeinheit22 induction heating unit
24 Induktionsheizeinheit24 induction heating unit
26 Induktionsheizeinheit26 induction heating unit
28 Induktionsheizeinheit28 induction heating unit
30 Litzenleitung 30 stranded wire
32 Induktionsheizleitung 32 induction heating cable
34 Induktionsheizleitung34 induction heating cable
42 Heizfrequenzeinheit42 heating frequency unit
43 Phase 43 phase
44 Heizfrequenzeinheit 44 heating frequency unit
45 Phase 45 phase
52 Kontakt  52 contact
53 Kontakt  53 contact
54 Kontakt  54 contact
55 Kontakt  55 contact
62 Elektronikbaugruppe 62 electronic module
64 Elektronikbaugruppe64 electronic module
70 Kontrolleinheit 70 control unit
72 Steuereinheit  72 control unit
74 Schaltanordnung 74 switching arrangement
75 Schaltelement 75 switching element

Claims

Patentansprüche claims
1. Induktionsheizvorrichtung, insbesondere Induktionskochfeldvorrichtung, mit zumindest einer Induktionsheizeinheit (20), die zumindest zwei An induction heating device, in particular an induction hob device, with at least one induction heating unit (20) comprising at least two
Induktionsheizleitungen (32, 34) aufweist, die dazu vorgesehen sind, von unterschiedlichen Heizfrequenzeinheiten (42, 44) versorgt zu werden, dadurch gekennzeichnet, dass die Induktionsheizleitungen (32, 34) beieinander angeordnet sind.  Induktionsheizleitungen (32, 34), which are intended to be supplied by different Heizfrequenzeinheiten (42, 44), characterized in that the induction heating (32, 34) are arranged together.
2. Induktionsheizvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die unterschiedlichen Heizfrequenzeinheiten (42, 44) dazu vorgesehen sind, an unterschiedliche Phasen (43, 45) eines 2. Induction heater according to one of the preceding claims, characterized in that the different Heizfrequenzeinheiten (42, 44) are provided to different phases (43, 45) of a
Mehrphasenstromanschlusses angebunden zu werden.  Multi-phase power connection to be connected.
3. Induktionsheizvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die zumindest zwei Induktionsheizleitungen (32, 34) jeweils von Litzen einer einzelnen Litzenleitung (30) gebildet sind. 3. Induction heater according to one of the preceding claims, characterized in that the at least two induction heating pipes (32, 34) are each formed by strands of a single stranded wire (30).
4. Induktionsheizvorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass die4. Induction heater according to claim 3, characterized in that the
Litzen, die dazu vorgesehen sind, unterschiedliche Induktionsheizleitungen (32, 34) zu bilden, unterschiedlich gefärbt sind. Strands intended to form different induction heating lines (32, 34) are colored differently.
5. Induktionsheizvorrichtung nach einem der vorhergehenden Ansprüche, 5. Induction heater according to one of the preceding claims,
gekennzeichnet durch eine Kontrolleinheit (70), die dazu vorgesehen ist, die zumindest zwei Induktionsheizleitungen (32, 34) einer einzelnen oder zumindest zwei unterschiedlichen Heizfrequenzeinheiten (42, 44) zuzuordnen.  characterized by a control unit (70) which is provided to assign the at least two induction heating pipes (32, 34) to a single or at least two different heating frequency units (42, 44).
6. Induktionsheizvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Induktionsheizeinheit (20) einen Durchmesser (14) aufweist, der kleiner ist als 28 cm. 6. Induction heater according to one of the preceding claims, characterized in that the induction heating unit (20) has a diameter (14) which is smaller than 28 cm.
7. Induktionsheizvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Induktionsheizleitungen (32, 34) dazu vorgesehen sind, gemeinsam eine Leistung von zumindest 3700 W umzusetzen. 7. Induction heater according to one of the preceding claims, characterized in that the induction heating pipes (32, 34) are provided to jointly implement a power of at least 3700 W.
8. Hausgerät, insbesondere Kochfeld, mit einer Induktionsheizvorrichtung (12) nach einem der vorhergehenden Ansprüche. 8. Domestic appliance, in particular hob, with an induction heating device (12) according to one of the preceding claims.
9. Verfahren zum Betrieb einer Induktionsheizvorrichtung (12) nach einem der Ansprüche 1 bis 7. 9. A method of operating an induction heating device (12) according to any one of claims 1 to 7.
10. Verfahren zur Herstellung einer Induktionsheizvorrichtung (12) nach einem der Ansprüche 1 bis 7. 10. A method for producing an induction heating device (12) according to any one of claims 1 to 7.
1 1. Litzenleitung, die dazu vorgesehen ist, in einer Induktionsheizvorrichtung (12), zumindest nach Anspruch 3, verwendet zu werden. 1 1. Litz wire, which is intended to be used in an induction heating device (12), at least according to claim 3.
EP12815785.6A 2011-11-28 2012-11-20 Induction heating apparatus Active EP2786637B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES201131914 2011-11-28
PCT/IB2012/056557 WO2013080088A2 (en) 2011-11-28 2012-11-20 Induction heating apparatus

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EP2786637A2 true EP2786637A2 (en) 2014-10-08
EP2786637B1 EP2786637B1 (en) 2022-07-27

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US10455647B2 (en) 2014-11-26 2019-10-22 Samsung Electronics Co., Ltd. Cooking apparatus and method for controlling the same

Citations (3)

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Publication number Priority date Publication date Assignee Title
US3710062A (en) * 1971-04-06 1973-01-09 Environment One Corp Metal base cookware induction heating apparatus having improved power supply and gating control circuit using infra-red temperature sensor and improved induction heating coil arrangement
EP1931177A1 (en) * 2006-12-04 2008-06-11 BSH Bosch und Siemens Hausgeräte GmbH Heating device connection
WO2013064968A2 (en) * 2011-11-04 2013-05-10 BSH Bosch und Siemens Hausgeräte GmbH Induction heating apparatus

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JPH06260270A (en) * 1993-03-03 1994-09-16 Matsushita Electric Ind Co Ltd Heating coil
FR2728132A1 (en) * 1994-12-09 1996-06-14 Bonnet Sa DEVICE FOR HEATING BY INDUCTION OF CONTAINER AND METHOD FOR CONTROLLING SUCH A DEVICE
DE202006016551U1 (en) * 2006-10-23 2008-03-06 E.G.O. Elektro-Gerätebau GmbH induction heating
JP4936971B2 (en) * 2007-04-24 2012-05-23 株式会社中部コーポレーション Large electromagnetic induction heating device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3710062A (en) * 1971-04-06 1973-01-09 Environment One Corp Metal base cookware induction heating apparatus having improved power supply and gating control circuit using infra-red temperature sensor and improved induction heating coil arrangement
EP1931177A1 (en) * 2006-12-04 2008-06-11 BSH Bosch und Siemens Hausgeräte GmbH Heating device connection
WO2013064968A2 (en) * 2011-11-04 2013-05-10 BSH Bosch und Siemens Hausgeräte GmbH Induction heating apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2013080088A2 *

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WO2013080088A2 (en) 2013-06-06
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ES2927333T3 (en) 2022-11-04

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