EP2774456B1 - Induktionsheizvorrichtung - Google Patents

Induktionsheizvorrichtung 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
European Patent Office
Prior art keywords
induction heating
units
unit
rectifier
heating apparatus
Prior art date
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Active
Application number
EP12806669.3A
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German (de)
English (en)
French (fr)
Other versions
EP2774456A2 (de
Inventor
Daniel Anton Falcon
Sergio Llorente Gil
Daniel Palacios Tomas
Diego Puyal Puente
Hector Sarnago Andia
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
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BSH Hausgeraete GmbH
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Publication date
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Publication of EP2774456A2 publication Critical patent/EP2774456A2/de
Application granted granted Critical
Publication of EP2774456B1 publication Critical patent/EP2774456B1/de
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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/06—Control, e.g. of temperature, of power
    • H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
    • 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.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Induction Heating Cooking Devices (AREA)
  • General Induction Heating (AREA)
EP12806669.3A 2011-11-04 2012-10-30 Induktionsheizvorrichtung Active EP2774456B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES201131770 2011-11-04
PCT/IB2012/055996 WO2013064968A2 (de) 2011-11-04 2012-10-30 Induktionsheizvorrichtung

Publications (2)

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

Family

ID=47436124

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12806669.3A Active EP2774456B1 (de) 2011-11-04 2012-10-30 Induktionsheizvorrichtung

Country Status (3)

Country Link
EP (1) EP2774456B1 (zh)
CN (1) CN103891400B (zh)
WO (1) WO2013064968A2 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013080088A2 (de) * 2011-11-28 2013-06-06 BSH Bosch und Siemens Hausgeräte GmbH Induktionsheizvorrichtung
KR102508227B1 (ko) 2018-05-29 2023-03-09 삼성전자주식회사 조리 장치 및 그 제어 방법

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2323837B1 (es) * 2007-06-21 2010-05-25 Bsh Electrodomesticos España, S.A. Circuito de dispositivo de coccion y procedimeinto para el calentamiento de un objeto.
ES2352772B1 (es) * 2008-12-19 2012-01-26 Bsh Electrodomésticos España, S.A. Campo de cocción con varios elementos de calentamiento y al menos un grupo constructivo de la electrónica de potencia.
FR2954661A1 (fr) * 2009-12-23 2011-06-24 Jaeger Inducteurs sur phases equilibrees
ES2384919B1 (es) * 2009-12-28 2013-05-20 Bsh Electrodomésticos España, S.A. Dispositivo de aparato de cocción.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

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

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