EP1921897A1 - Circuit de dispositif de chauffage - Google Patents

Circuit de dispositif de chauffage Download PDF

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Publication number
EP1921897A1
EP1921897A1 EP07119968A EP07119968A EP1921897A1 EP 1921897 A1 EP1921897 A1 EP 1921897A1 EP 07119968 A EP07119968 A EP 07119968A EP 07119968 A EP07119968 A EP 07119968A EP 1921897 A1 EP1921897 A1 EP 1921897A1
Authority
EP
European Patent Office
Prior art keywords
heating
unit
voltage
modules
voltage converter
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.)
Withdrawn
Application number
EP07119968A
Other languages
German (de)
English (en)
Inventor
Rafael Alonso Esteban
Luis Angel Barragan Perez
José Miguel Burdio Pinilla
Jose-Ramon Garcia Jimenez
Ignacio Garde Aranda
Pablo Jesus Hernandez Blasco
Fernando Monterde Aznar
Denis Navarro Tabernero
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 EP1921897A1 publication Critical patent/EP1921897A1/fr
Withdrawn legal-status Critical Current

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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
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/12—Cooking devices
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/06—Control, e.g. of temperature, of power
    • H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2213/00—Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
    • H05B2213/03—Heating plates made out of a matrix of heating elements that can define heating areas adapted to cookware randomly placed on the heating plate

Definitions

  • the invention is based on a heater circuit, in particular an induction cooker circuit, according to the preamble of claim 1.
  • radiators such as e.g. Induction coils, which are operated in operation under a mains supply voltage.
  • the object of the invention is in particular to develop generic Schuffleiquessscigenen that can provide operating characteristics for operating the radiator, which are adapted to a design of the radiator.
  • the invention is based on a heater circuit, in particular an induction cooker circuit, with at least one heating unit.
  • the heater circuit has a voltage conversion unit associated with the heating unit. It can be advantageously provided an operating voltage of the heating unit, which is adapted to an actual design of the heating unit.
  • the voltage converter unit can serve to supply the heating unit with an operating voltage which is adapted to the impedance of the heating unit.
  • an "association" can be understood to be, in particular, the provision of a live connection, in particular under the form of an electrical line, between the heating unit and the voltage transformer unit.
  • the heating unit or functional components of the heating unit can have an electrical signal which has a voltage provided by the voltage transformer unit.
  • An “association” may in this context be understood to mean in particular an upstream connection become.
  • the voltage conversion unit can convert an input voltage into an output voltage whose value is predefined and kept constant. Alternatively, the output voltage may depend on a load connected downstream of the voltage converter unit.
  • the heating device circuit according to the invention is particularly suitable for use in induction cooking devices, such as e.g. at an induction hob.
  • Induction cooking appliances in which the radiators correspond to induction heating coils, may differ in particular with regard to the geometry of the induction heating coils used. It can e.g. Indu Wegswespulen with different circumference and / or a different number of windings are used.
  • the voltage converter unit can provide an operating voltage for operating the induction heating coils, which is specially matched to its impedance.
  • the voltage converter unit is assigned to at least one set of heating modules for generating a heating signal.
  • a heating module preferably has at least one heating element for generating the heating signal, which is transmitted to an object to be heated.
  • the heating module may further comprise a control means for controlling the radiator. If the heating signal has a heating frequency, the control means is preferably designed as a heating frequency unit for generating the heating frequency.
  • the heating signal is designed as a magnetic alternating field with the heating frequency.
  • the heating frequency unit is e.g. designed as an inverter.
  • the heating device circuit comprises a control unit which is arranged to form a heating group of heating modules designed for heating the object, depending on a position of an object to be heated relative to the heating modules.
  • a control unit which is arranged to form a heating group of heating modules designed for heating the object, depending on a position of an object to be heated relative to the heating modules.
  • the heating modules are preferably arranged below a cooking plate.
  • a heating group of heating modules is preferably composed of heating modules of the set, which are at least partially covered by the object located on the hotplate, in particular a cookware.
  • the arrangement of the heating modules is preferably designed as a matrix arrangement. In this case, heating modules of different rows and / or different columns of the matrix arrangement can be at least partially covered by the object placed on the hotplate.
  • the heating modules are preferably dimensioned such that a cookware of conventional dimensions, such as e.g. a pot with a diameter of at least 8 cm, heating modules of different rows and different columns at least partially covers.
  • the set of heating modules defines a contiguous cooking zone of the hotplate surface suitable for heating the article which covers at least a majority of the hotplate surface, advantageously at least 60%, preferably at least 70% and most preferably at least 80% of the hotplate surface.
  • the control unit here is preferably provided to adapt the composition of the heating group to a change in the position of the object relative to the heating modules at least partially automatically, advantageously fully automatically.
  • a heating unit provided for group operation of the heating modules is preferably provided with a large number of heating modules, in particular with at least six heating modules.
  • the heating unit is preferably provided with a set of at least ten, advantageously at least twenty, more preferably at least forty heating modules.
  • the heating modules of such a set have by their construction in particular a smaller resistance than heating modules, which are used in a cooking device with predefined cooking areas of the hotplate.
  • the voltage converter unit can easily achieve an operating voltage that is adapted to heating modules provided for group operation.
  • the voltage converter unit has a maximum power which is smaller than the power of the set of heating modules.
  • the "power of the set” preferably corresponds to the sum of all individual services, in particular maximum outputs of the heating modules. This is particularly suitable when the heating modules are provided for heating an object by means of a group operation.
  • the set of heating modules is distributed to groups of powered and non-powered heating modules. As a result, in a heating operation, the heating unit is typically operated at a lower power than the sum of the individual powers of all the heating modules of the set.
  • the maximum power of the voltage converter unit can advantageously be chosen to be less than 90%, particularly advantageously less than 70%, and particularly preferably less than 50% of the power of the set.
  • the "maximum power" of a unit can be understood as meaning, in particular, the maximum admissible acceptance or output power. Their value is determined by the sizing of internal components of the unit. The maximum power may correspond to the upper limit of a power range suitable for trouble-free operation of the unit.
  • the term “maximum power” can be understood as the term rated power.
  • the heater circuit is provided with a protection device intended to limit a power accepted or output by the voltage conversion unit.
  • a protection device intended to limit a power accepted or output by the voltage conversion unit.
  • the voltage converter unit may have the protective device as an internal component, or the protective device may be designed as a component and / or as a program of an external control unit for controlling an operation of the set of heating modules.
  • the protection means may comprise a sensor unit for detecting the output power, e.g. a current transformer for detecting a current accepted by the voltage conversion unit.
  • a structurally simple and cost-effective design of the voltage converter unit can be achieved if it has a DC-DC converter.
  • This is suitable for applications with high current intensity, such as in particular in an application in an induction cooking device.
  • the DC-DC converter is connected directly downstream of a rectifier for rectifying a signal related to a mains power supply.
  • the voltage converter unit serves to convert an input voltage into a smaller output voltage, whereby a particularly effective operation of a heating unit with a low impedance can be achieved.
  • This is particularly suitable for use in an induction cooking device, which is provided for a group operation of heating modules.
  • the impedance of a heating module is typically less than one ohm. It is advantageous in this context if the voltage converter unit serves to at least halve the input voltage.
  • the input voltage is designed as a mains power supply voltage.
  • the voltage conversion unit is assigned to a set of printed circuit boards, on each of which a group of functional components of the heating unit is arranged. Thereby, a compact and structurally simple embodiment of the heater circuit can be achieved.
  • a heating frequency unit preferably forms with a heating element a heating module for generating a heating signal, which is transmitted to an object to be heated.
  • the voltage converter unit has a set of voltage transformers which are each assigned to a line current phase, whereby a flexible use of multiple current phases can be achieved.
  • the heating device 10 has a mounting frame 12 for attachment to a countertop, a cooking plate 14 for placing cookware and a control panel 16 for starting, stopping and setting a heating operation.
  • On the hotplate 14 two designed as a pot objects 18, 20 are arranged, which are each shown schematically by a solid circle.
  • the heating unit 22 has a set of heating modules 24, each comprising a heating element 26 designed as an induction coil.
  • the arrangement of the radiator 26, which is shown schematically in the figure by a dashed rectangle, is designed as a matrix arrangement. Radiators 26 of different columns and different rows are covered by the object 18.
  • a heating signal H which is designed as an alternating magnetic field, is generated by the corresponding heating element 26 (see FIG. 2), which has a heating frequency, e.g. 25 kHz.
  • the heating signal H induces electrical currents in the metallic bottom of the objects 18, 20. These electrical currents heat up due to ohmic losses in the objects 18, 20 located food.
  • a radiator 26 in operation of the corresponding heating module 24 is fed to generate the heating signal H with an alternating electrical current, which oscillates with the heating frequency.
  • the heating modules 24 are each provided with a heating frequency unit 28 designed as an inverter. These heating frequency units 28 are shown in FIG.
  • the heating device 10 is provided for heating the articles 18, 20 by means of a group operation of the heating modules 24.
  • the heating modules 24 each with a sensor means not shown provided by means of which it can be detected whether a heating module 24 is covered by one of the objects 18, 20 at least partially.
  • heating groups of heating modules 24 are formed, which are each assigned to one of the objects 18, 20. If an operator starts a cooking operation of the heating device 10 by means of the control panel 16, this cooking operation is carried out by means of the heating modules 24 of both heating groups, while the other heating modules 24 which do not belong to any of the heating groups formed, remain undriven. If the operator adjusts one of the objects 18, 20 on the cooking plate 14 or places another cookware on the cooking plate 14, corresponding heating groups of heating modules 24 are adapted or newly formed on the basis of the new arrangement of objects to be heated relative to the radiators 26.
  • FIG. 2 schematically shows a heating device circuit 30 of the heating device 10 from FIG.
  • the heating device circuit 30 comprises the heating unit 22.
  • This comprises the set of radiators 26, each formed as an induction coil and can also be seen in Figure 1.
  • the heating unit 22 further comprises, as described above, a set of heating frequency units 28 associated with the set of radiators 26, wherein a heating frequency unit 28 and a radiator 26 each form a heating module 24.
  • the set of heating modules 24 is distributed among different groups 32.
  • the set is distributed among groups 32 of six heating modules 24 each.
  • Each group 32 of heating modules 24 is associated with a control unit 34, which is provided for controlling the heating frequency units 28 of the group 32.
  • the control units 34 may comprise a microprocessor or they may be formed as a microprocessor.
  • the heating frequency units 28 of a group 32 and the associated control unit 34 are each mounted on a printed circuit board 36.
  • the heating unit 22 thus has a number of different circuit boards 36, which corresponds to the number of group 32 of heating modules 24.
  • the heating unit 22 has eight groups 32. For the sake of clarity, only two groups 32 with the corresponding circuit boards 36 have been shown in the figure.
  • the power lines shown in dashed lines can also be flexibly changed during operation, for example by the assignment of the radiator 26 to the heating frequency units 28 to form a Heating module 24 during operation of the heating unit 22 can be adjusted.
  • the heater circuit 30 is provided with a power supply unit 38 which is connected to a mains power supply 40 on the one hand and to each of the printed circuit boards 36 on the other hand.
  • the power supply unit 38 provides a power supply signal on a bus bar 42, from each of which a power supply 44 is branched off to supply one of the control units 34.
  • the heater circuit 30 is further provided with a control unit 46.
  • the control unit 46 may comprise a microprocessor or it may be designed as a microprocessor. It is connected via a data bus 47 to the control units 34 of the various groups 32 of heating modules 24.
  • the control unit 46 is particularly designed to form the heating groups and to control a heating operation with the heating groups, depending on the position of the objects 18, 20 on the hotplate by means of a communication with the control units 34.
  • control unit 46 for controlling a group operation by a control unit 34 or more control units 34 of the groups 32 of heating modules 24 are taken over, the group operation of the heating modules 24 by means of an at least partial self-organization of the control units 34 takes place.
  • control units 34 can be connected to each other for the exchange of information, which in the figure schematically indicate dashed connecting lines between the control units 34.
  • the heating frequency units 28 are provided for generating the heating frequency of the heating signal H generated by the corresponding radiator 26.
  • the heating frequency units 28 are each designed as inverters.
  • a heating frequency unit 28 preferably comprises at least one pair of switching means 48, which are formed as semiconductor components. Irrespective of the topology of the heating frequency unit 28, the switching means 48 of the heating-frequency units 28 are indicated schematically by means of a transistor symbol.
  • the switching means 48 are formed as an IGBT (Insulated Gate Bipolar Transistor or Insulated Gate Bipolar Transistor).
  • the inverter can be constructed with different topologies, such as a pair of Switching means 48 in a half-bridge topology or with two pairs of switching means 48 arranged in a full-bridge topology.
  • the heating-frequency units 28 are supplied with an electrical signal 50 which has a direct voltage V.
  • the Schufrequenzüen 28 generate the alternating current from this electrical signal 50 by means of switching operations of the switching means 48, which are controlled by the control unit 34 of the corresponding group 32. This principle is known and will not be explained in detail in the context of this description.
  • the electrical signal 50 is generated by means of rectifying a mains power signal 52.
  • the heating device circuit 30 is provided with a rectifier 54, which is shown schematically by means of a diode symbol.
  • the rectifier 54 provides an electrical signal having a DC voltage corresponding to a mains supply voltage V N of 230V.
  • the heating elements 26 designed as induction heating coils are designed with a diameter which is smaller than 100 mm. Induction heating coils in conventional induction cooking zones with predefined cooking zones typically have a diameter of over 200 mm.
  • the impedance of the heating elements 26 has a value which is less than 1 ⁇ .
  • a typical impedance of a radiator in a conventional induction hob is about 3.5 ⁇ . It is therefore advantageous if the heating modules 24 are operated with the DC voltage V, which is smaller than the mains power supply voltage V N is formed.
  • the heater circuit 30 has a voltage converter unit 56, which is connected downstream of the rectifier 54.
  • the voltage conversion unit 56 is formed by a DC-DC converter. This generates the electrical signal 50, with which the Schufrequenzüen 28 are fed and whose DC voltage V has a value between 30 V and 100 V.
  • the voltage converter unit 56 is connected to the circuit boards 36 via a bus bar 58.
  • Supply lines 60 for supplying the electrical signal 50 to one of the printed circuit boards 36 or to the heating frequency units 28 arranged on this printed circuit board 36 are branched off from this bus bar 58.
  • the assignment of the voltage converter unit 56 for a plurality of groups 32 of heating modules 24 or for a plurality of circuit boards 36 a particularly simple design of the heater circuit 30 can be achieved.
  • This can be special can be achieved by providing the electrical signal 50 for the heating frequency units 28 by means of the common rail 58 for the heating frequency units 28.
  • the heating modules 24 are dimensioned to provide a maximum power of 500W.
  • the heating unit 22 thus has a theoretical maximum power P M of 24 kW, which could be achieved if all the heating modules 24 would be operated simultaneously with its maximum power. Since this does not take place in a realistic application of the heating device 10, it is advantageous if the maximum power of the voltage converter unit 56 is smaller than the sum of the individual powers of the heating modules 24.
  • the maximum power of the voltage converter unit 56 has a value between 10% and 50% of the maximum power P M.
  • the voltage conversion unit 56 has a maximum power of 3600W.
  • the heater circuit 30 is provided with a power limiter that limits the power assumed by the heater unit 22 to the maximum power of the voltage conversion unit 56.
  • the control unit 46 is programmed with software that monitors and limits the power received by the heater unit 22.
  • the voltage converter unit 56 may include a power limiter, such as in the form of a current limiter.
  • FIG. 3 shows a detailed view of the voltage converter unit 56.
  • This is designed as a DC-DC converter, which is designed as a buck converter of the so-called BUCK type.
  • the voltage conversion unit 56 has a diode 62, an inductance 64 and a switch 66. Within a period T, the switch 66 is in a conductive state for a time t on less than T.
  • the input signal corresponds to the signal rectified by the rectifier 54 with the mains supply voltage V N.
  • the output voltage corresponding to the DC voltage V for feeding the heating frequency units 28 is smaller compared to the input voltage V N and can be varied by adjusting the ratio t on / T.
  • the principle of such a DC-DC converter is known and will not be explained in detail in the context of this description.
  • the DC voltage V has a value between 30 V and 100 V.
  • heater 60 supply line 12 mounting frame 62 diode 14 hotplate 64 inductance 16 Control panel 66 switch 18 object H heating signal 20 object V DC 22 heating unit V N AC power supply voltage 24 heating module 26 radiator 28 Schufrequenzappel 30 heater board 32 group 34 control unit 36 circuit board 38 Power supply unit 40 AC power supply 42 conductor rail 44 power 46 control unit 47 bus 48 switching means 50 signal 52 AC power signal 54 rectifier 56 DC converter unit 58 conductor rail

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Induction Heating Cooking Devices (AREA)
EP07119968A 2006-11-08 2007-11-05 Circuit de dispositif de chauffage Withdrawn EP1921897A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES200602926A ES2310960B1 (es) 2006-11-08 2006-11-08 Circuito de dispositivo de calentamiento.

Publications (1)

Publication Number Publication Date
EP1921897A1 true EP1921897A1 (fr) 2008-05-14

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ID=38984164

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07119968A Withdrawn EP1921897A1 (fr) 2006-11-08 2007-11-05 Circuit de dispositif de chauffage

Country Status (2)

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EP (1) EP1921897A1 (fr)
ES (1) ES2310960B1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010069616A1 (fr) * 2008-12-19 2010-06-24 BSH Bosch und Siemens Hausgeräte GmbH Table de cuisson avec au moins trois zones de cuisson
EP2506669A3 (fr) * 2011-03-29 2012-11-07 BSH Bosch und Siemens Hausgeräte GmbH Dispositif de commutation

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2836610A1 (de) * 1978-08-22 1980-03-06 Licentia Gmbh Induktions-heizgeraet mit einem wechselrichter, wobei die induktionsspule des schwingkreises die heizspule fuer das kochgeschirr ist
DE3710085A1 (de) * 1987-03-27 1988-10-13 Asea Brown Boveri Einrichtung zur induktiven erwaermung eines werkstueckes mittels mehrerer induktoren
DE3925047A1 (de) * 1989-07-28 1991-01-31 Paul Dr Ing Braisch Verfahren zur werkstoffabhaengigen steuerung von waermebehandlungsprozessen von metallen und vorrichtung zur durchfuehrung des verfahrens
DE4116871A1 (de) * 1990-05-25 1991-11-28 Sawafuji Electric Co Ltd Ac/dc-mikrowellenofen
US5450305A (en) * 1991-08-12 1995-09-12 Auckland Uniservices Limited Resonant power supplies
US5773799A (en) * 1996-04-01 1998-06-30 Gas Research Institute High-frequency induction heating power supply
US6246040B1 (en) * 1999-01-29 2001-06-12 Bradley R. Gunn Solid state RF generator for dielectric heating of food products
WO2004077000A1 (fr) * 2003-02-25 2004-09-10 Hubert Eric Walter Systeme et procede pour determiner des temperatures
WO2004103028A1 (fr) * 2003-05-15 2004-11-25 BSH Bosch und Siemens Hausgeräte GmbH Regulation de temperature destinee a un element de chauffage chauffe par induction
FR2862895A1 (fr) * 2003-11-28 2005-06-03 Fournel Procedes de controle automatique de la puissance et du temps de frettage ou defrettage
JP2006230517A (ja) * 2005-02-23 2006-09-07 Cleanup Corp システムキッチン
WO2006092179A1 (fr) * 2005-03-01 2006-09-08 BSH Bosch und Siemens Hausgeräte GmbH Dispositif de chauffe pour un appareil de cuisson a induction

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2836610A1 (de) * 1978-08-22 1980-03-06 Licentia Gmbh Induktions-heizgeraet mit einem wechselrichter, wobei die induktionsspule des schwingkreises die heizspule fuer das kochgeschirr ist
DE3710085A1 (de) * 1987-03-27 1988-10-13 Asea Brown Boveri Einrichtung zur induktiven erwaermung eines werkstueckes mittels mehrerer induktoren
DE3925047A1 (de) * 1989-07-28 1991-01-31 Paul Dr Ing Braisch Verfahren zur werkstoffabhaengigen steuerung von waermebehandlungsprozessen von metallen und vorrichtung zur durchfuehrung des verfahrens
DE4116871A1 (de) * 1990-05-25 1991-11-28 Sawafuji Electric Co Ltd Ac/dc-mikrowellenofen
US5450305A (en) * 1991-08-12 1995-09-12 Auckland Uniservices Limited Resonant power supplies
US5773799A (en) * 1996-04-01 1998-06-30 Gas Research Institute High-frequency induction heating power supply
US6246040B1 (en) * 1999-01-29 2001-06-12 Bradley R. Gunn Solid state RF generator for dielectric heating of food products
WO2004077000A1 (fr) * 2003-02-25 2004-09-10 Hubert Eric Walter Systeme et procede pour determiner des temperatures
WO2004103028A1 (fr) * 2003-05-15 2004-11-25 BSH Bosch und Siemens Hausgeräte GmbH Regulation de temperature destinee a un element de chauffage chauffe par induction
FR2862895A1 (fr) * 2003-11-28 2005-06-03 Fournel Procedes de controle automatique de la puissance et du temps de frettage ou defrettage
JP2006230517A (ja) * 2005-02-23 2006-09-07 Cleanup Corp システムキッチン
WO2006092179A1 (fr) * 2005-03-01 2006-09-08 BSH Bosch und Siemens Hausgeräte GmbH Dispositif de chauffe pour un appareil de cuisson a induction

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010069616A1 (fr) * 2008-12-19 2010-06-24 BSH Bosch und Siemens Hausgeräte GmbH Table de cuisson avec au moins trois zones de cuisson
ES2353890A1 (es) * 2008-12-19 2011-03-08 Bsh Electrodomesticos España, S.A. Campo de cocción con al menos tres zonas de calentamiento.
CN102257876A (zh) * 2008-12-19 2011-11-23 Bsh博世和西门子家用电器有限公司 具有至少三个加热区的灶台
US9113502B2 (en) 2008-12-19 2015-08-18 Bsh Bosch Und Siemens Hausgeraete Gmbh Cook-top having at least three heating zones
CN102257876B (zh) * 2008-12-19 2016-03-02 Bsh家用电器有限公司 具有至少三个加热区的灶台
EP2506669A3 (fr) * 2011-03-29 2012-11-07 BSH Bosch und Siemens Hausgeräte GmbH Dispositif de commutation
EP2506669B1 (fr) 2011-03-29 2016-10-12 BSH Hausgeräte GmbH Dispositif de commutation

Also Published As

Publication number Publication date
ES2310960B1 (es) 2009-11-05
ES2310960A1 (es) 2009-01-16

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