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EP2494846B1 - Plaque de cuisson à au moins deux résistances, et dispositif électronique de puissance - Google Patents

Plaque de cuisson à au moins deux résistances, et dispositif électronique de puissance Download PDF

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Publication number
EP2494846B1
EP2494846B1 EP10776822.8A EP10776822A EP2494846B1 EP 2494846 B1 EP2494846 B1 EP 2494846B1 EP 10776822 A EP10776822 A EP 10776822A EP 2494846 B1 EP2494846 B1 EP 2494846B1
Authority
EP
European Patent Office
Prior art keywords
heating elements
power supply
cook top
supply units
heating
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.)
Active
Application number
EP10776822.8A
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German (de)
English (en)
Other versions
EP2494846A1 (fr
Inventor
Daniel Anton Falcon
Carlos Bernal Ruiz
José Miguel Burdio Pinilla
Jose Maria De La Cuerda Ortin
Jose-Ramon Garcia Jimenez
Pablo Jesus Hernandez Blasco
Sergio Llorente Gil
Oscar Lucia Gil
Arturo Mediano Heredia
Ignacio Millan Serrano
Fernando Monterde Aznar
Daniel Moros Sanz
Jose Joaquin Paricio Azcona
Diego Puyal Puente
Jose Ignacio Artigas Maestre
Luis Angel Barragan Perez
Claudio Carretero Chamarro
Oscar Jimenez Navascues
Denis Navarro Tabernero
Isidro Urriza Parroque
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
Original Assignee
BSH Hausgeraete GmbH
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 Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Publication of EP2494846A1 publication Critical patent/EP2494846A1/fr
Application granted granted Critical
Publication of EP2494846B1 publication Critical patent/EP2494846B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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

Definitions

  • the invention relates to a hob with at least two heating elements and a power electronics assembly according to the preamble of claim 1.
  • Cooking hobs which comprise a plurality of heating elements and a power electronics assembly for connecting the hob to one or more phases of a household power grid. It is common to use separate power electronics assemblies each with a filter and a rectifier for each phase of a household power grid. Hobs, which are connected to only one phase of the household electricity network, are usually of low cost and simple design and have due to the power limitation of the household electricity network over a limited heating capacity, which may be, for example, a maximum of 4.6 kW.
  • Such switch assemblies typically combine a large number of heating elements, for example, small inducers of a matrix cooktop, with a much smaller number of power supply units, such as inverters.
  • the switch assembly therefore branches in the direction of the heating elements and each heating element is usually associated with the end of a branch of the branching tree structure.
  • Each of the heating elements can therefore be connected in exactly one way to a power supply unit get connected. Exceptions to this rule can be found in cooktops with a so-called booster mode, in which two power supply units can be interconnected to operate a single heating element.
  • a corresponding electromechanical relay opens or closes a bridge between the two power supply units, in particular between two inverters of an induction hob. Since the heating power is to be concentrated in the booster mode just on a heating element, in each case a further switch is disposed between this switch bridge and the heating elements, which can separate the heating elements not to be heated from the power supply.
  • the invention is therefore based on the object of making the association between power supply units and heating elements more flexible, reducing the number of switching operations necessary for the alternating use of a power supply unit for a plurality of heating elements and simplifying the fulfillment of standards for electromagnetic compatibility. Furthermore, the invention has the object to enable emergency operation of the hob even if one of the switches in the switch assembly is rendered inoperable by a defect.
  • the invention relates to a hob with at least two heating elements and a power electronics assembly for connection to a single phase of a household electricity network.
  • the power electronics assembly includes a plurality of power supply units for supplying each one or more heating elements with heating currents.
  • the hob comprises a switch assembly with a plurality of electromechanical Relay for connecting and / or disconnecting the power supply units to and from the heating elements.
  • the invention relates to cooking fields with at least three heating zones or at least three heating elements, which are fed by a single phase of the household electricity network and which are arranged, for example, under a cover plate with edge lengths between 60 and 80 cm.
  • At least one of the heating elements is fixedly connected to one of at least two output terminals of at least two of the electromechanical relays.
  • a redundant switch arrangement is realized, in which the heating element can be supplied with heating current optionally via two different paths, wherein each of the paths comprises one of the two relays.
  • the number of switching options and the number of possible assignments between power supply units and heating elements is significantly increased, thereby increasing the flexibility of the hob.
  • the heating elements are inductors and the power supply units comprise an inverter which can generate a high-frequency heating current from the rectified and possibly filtered current from the household power grid.
  • the frequencies of heating currents in induction hobs are typically between 20 kHz and 100 kHz.
  • the sum of the nominal outputs of the heating elements can be selected greater than the nominal power of the power electronics assembly.
  • the nominal power of the power electronics assembly is usually just below the maximum available power of a phase of the household power grid and can be, for example, 4.6 kW for Germany.
  • the maximum power consumed by the power electronics can also be made adjustable depending on the available power. This setting can be used in combination with other country settings, such as a time zone and / or language.
  • each of the heating elements is fixedly connected to one of at least two output terminals of at least two of the electromechanical relays.
  • the redundant power supply can thus be realized for each of the heating elements.
  • one or more heating elements may be connected to one of at least two output terminals of only a single electromagnetic relay.
  • the power electronics assembly includes a low pass filter and a rectifier shared for all power supply units.
  • single-pole changeover switches can be used as electromechanical relays, wherein the two output poles can be connected to different heating elements.
  • a common center terminal of the relay is connected to a power supply unit and the two output poles of the relay are each arranged with a heating element or in the connection between the heating element and the power supply unit in the corresponding direction.
  • a further increased flexibility of the switch arrangement can be realized by a plurality of series-connected relays in a connection between a power supply unit and a heating element.
  • the switch arrangement may in particular comprise a plurality of branch layers.
  • the number of branch layers or the number of relays connected in series can also be designed differently for different heating elements.
  • the centrally arranged heating elements can be very flexibly combined with other heating elements to heating zones, which is not necessary for heating elements which are arranged at the edge of the heating zone to the same extent.
  • Fig. 1 schematically shows a hob with four heating elements 10a-10d and a power electronics assembly 12.
  • the power electronics assembly is used to connect the hob to a single phase 14 of a household power network and supplies the entire hob from the flow of this phase fourteenth
  • the power electronics assembly includes a filter 16 and a rectifier 18 which filter the AC drawn from the household power grid and in a DC current convert, which undergoes further filtering by a damping capacitor 20.
  • the filter 16 is a low-pass filter that prevents damage to the hob by strong pulses from the household power grid and flicker amplifying feedback from the hob in the household power grid.
  • the power electronics module further comprises two power supply units 22a, 22b, which are designed as inverters and which are operated by a control unit, not shown here, so that a heating current is generated at a desired heating frequency.
  • the two inverters 22a, 22b can generate heating currents with different heating frequencies, different amplitudes and / or different load cycles or phases in order to generate the desired heating power in the heating elements 10a-10d.
  • the heating elements 10a-10d are inductors that generate a high-frequency magnetic field at the frequency of the heating current. The magnetic field induces eddy currents in a ferromagnetic bottom of a cooking utensil element placed on the hob in the region of the relevant heating element 10a-10d, which is heated thereby.
  • a switch arrangement 24 with electromechanical relays 26a-26d is arranged between the power supply units 22a, 22b and the heating elements 10a-10d.
  • the relays 26a-26d are unipolar changeover switches whose common center connection is connected to a respective pole of two further relays 28a, 28b.
  • the further relays 28a, 28b are connected via their center connection to a respective power supply unit 22a, 22b.
  • Each of the power supply units 22a, 22b may be connected to each of the heating elements 10a-10d by appropriate switching of the relays 26a, 26b, 28a-28d.
  • the heating elements 10a-10d are in turn fixedly connected to two output terminals of two different relays 26a-26d of the second relay layer of the switch arrangement 24.
  • each of the heating elements 10a-10d can be connected to both power supply units 22a, 22b at the same time in order to concentrate the total available energy on the heating element 10a-10d in question.
  • the two power supply units 22a, 22b designed as inverters should generate heating currents with the same heating frequency in order to avoid destructive interference.
  • the output poles of the relays 26a-26d, to which one of the heating elements 10a-10d is connected, are selected so that in the non-switching state of the relay 26a-26d exactly one of the two relays connects the heating element 10a-10d to one of the power supply units 22a, 22b while the other relay 26a-26d disconnects the connection to the other power supply unit 22a, 22b.
  • the heating element 10a is thus connected, for example, to the normally closed (NC) output terminal of the relay 26b and to the normally open (NO) output terminal of the relay 26c.
  • the sum of the nominal powers of the heating elements 10a-10d is greater than the nominal power of the power electronics assembly 12 and the phase 14 of the household power grid.
  • the sum of the nominal outputs of the heating elements 10a-10d can be 7.2 kW and the nominal power of the power electronics assembly 4.6 kW.
  • FIG. 1 illustrated two-layer structure of the switch assembly 24 are arranged in the connections between the heating elements 10a-10d and the power supply units 22a, 22b each have two series-connected relay 28a, 28b, 26a-26d.
  • Fig. 2 shows a further embodiment of the invention.
  • the following description is limited essentially to differences from those in Fig. 1 illustrated embodiment, while with regard to consistent features on the description in Fig. 1 is referenced.
  • the hob comprises three heating elements 10a-10c and the switch assembly 24 includes only a total of four relays 28a, 28b, 26a, 26b.
  • the heating element 10a is connected to the power supply units 22a, 22b via only one relay 28a, 28b, while the heating elements 10b, 10c are connected to the power supply units 22a, 22b via two series-connected relays 26a, 28a and 26b, 28b, respectively.
  • Fig. 3 shows a further alternative embodiment of the invention with only two relays 26a, 26b and three heating elements 10a, 10b, 10c. Of the heating elements, only the middle heating element 10b is connected to output terminals of both relays 26a, 26b, while the heating elements 10a are connected to the output terminal of only one relay 26a, 26b, respectively.
  • Fig. 4 shows a generalization of the structure of an induction hob according to the invention with M power supply units 22.1-22.M or inverters and N heating elements 10.1-10.N, which are connected via a switch assembly 24 to the power supply units 22.1-22.M. It is M ⁇ N.
  • the number K of the branching stages 30.1-30.K of the array 24 is at least as large as the smallest integer larger than the two logarithm of the number of power supply units M.
  • the switch assembly 24 may be mounted on a separate board or together with the power supplies 22.1-22.M on a single board. The same applies to the low-pass filter 16 and the rectifier 18. These elements can also be mounted on a separate board or together with the power supply units 22.1-22.M on a large board.
  • the invention can be used both for traditional well mirrors with four fixed heating zones and for matrix hobs with a large number of heating elements arranged in a grid and flexibly combined to heat a single pot.
  • the topology in Fig. 3 is particularly suitable for troughs with so-called paella heating zones in which in the middle of the hob with the help of the central heating element 10b, a large heating zone for heating a Paellapfanne is generated.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Induction Heating Cooking Devices (AREA)
  • Control Of Resistance Heating (AREA)

Claims (11)

  1. Champ de cuisson avec au moins trois éléments chauffants (10 a - 10 d) et un dispositif électronique de puissance (12) pour le raccordement à une seule phase (14) d'un réseau électrique domestique, dans lequel le dispositif électronique de puissance (12) englobe plusieurs unités d'alimentation électrique (22 a, 22 b) pour l'alimentation respective d'un ou de plusieurs élément(s) chauffant(s) (10 a - 10 d) en courants de chauffage, et avec un dispositif commutateur (24) avec plusieurs relais électromécaniques (26 a - 26 d ; 28 a, 28 b) pour la liaison et/ou la séparation des unités d'alimentation électrique aux resp. des éléments chauffants (10 a - 10 d), dans lequel le nombre d'unités d'alimentation électrique (22 a, 22 b) est inférieur au nombre d'éléments chauffants (10 a - 10 d) reliés aux unités d'alimentation électrique (22 a, 22 b) via le dispositif commutateur (24), dans lequel au moins l'un des éléments chauffants (10 a - 10 d) est relié de manière fixe à respectivement l'un d'au moins deux pôles de sortie d'au moins deux des relais électromagnétiques (26 a - 26 d).
  2. Champ de cuisson selon la revendication 1, caractérisé en ce que les éléments chauffants (10 a - 10 d) sont des inducteurs et les unités d'alimentation électrique (22 a, 22 b) englobent respectivement un onduleur.
  3. Champ de cuisson selon l'une des revendications précédentes, caractérisé en ce que la somme des puissances nominales des éléments chauffants (10 a - 10 d) est supérieure à la puissance nominale du dispositif électronique de puissance.
  4. Champ de cuisson selon l'une des revendications précédentes, caractérisé en ce que dans l'état exempt de courant de commutation des deux relais (26 a - 26 d) exactement l'un des deux relais relie l'élément chauffant (10 a - 10 d) à l'une des unités d'alimentation électrique (22 a, 22 b), tandis que l'autre relais (26 a - 26 d) assure la séparation de l'autre unité d'alimentation électrique (22 a, 22 b).
  5. Champ de cuisson selon l'une des revendications précédentes, caractérisé en ce que chacun des éléments chauffants (10 a - 10 d) est relié de manière fixe avec respectivement l'une d'au moins deux pôles de sortie d'au moins deux des relais électromécaniques (26 a - 26 d).
  6. Champ de cuisson selon l'une des revendications 1 à 3, caractérisé en ce qu'au moins l'un des éléments chauffants (10 a - 10 d) est relié à l'une d'au moins deux pôles de sortie d'un seul relais électromécanique (26 a - 26 d).
  7. Champ de cuisson selon l'une des revendications précédentes, caractérisé en ce que le dispositif électronique de puissance englobe un filtre passe-bas (16) et un redresseur (18) devenant commun pour toutes les unités d'alimentation électrique (22 a, 22 b).
  8. Champ de cuisson selon l'une des revendications précédentes, caractérisé en ce que les relais électromécaniques (26 a - 26 d) sont des inverseurs va-et-vient unipolaires.
  9. Champ de cuisson selon la revendication 8, caractérisé en ce qu'un raccordement central du relais (26 a - 26 d) est relié à une unité d'alimentation électrique (22 a, 22 b) et les deux pôles de sortie du relais (26 a - 26 d) sont respectivement reliées à un élément chauffant (10a - 10d).
  10. Champ de cuisson selon l'une des revendications précédentes, caractérisé en ce que le dispositif commutateur (24) englobe plusieurs relais branchés en série (26 a - 26 d ; 28 a, 28 b) dans une liaison entre une unité d'alimentation électrique (22 a, 22 b) et un élément chauffant (10a - 10d).
  11. Champ de cuisson selon la revendication 10, caractérisé en ce qu'un nombre différent de relais montés en série (26 a - 26 d ; 28 a, 28 b) est monté dans les liaisons entre deux éléments chauffants (10 a - 10 d) et une ou deux unité(s) d'alimentation électrique (22 a, 22 b).
EP10776822.8A 2009-10-26 2010-10-19 Plaque de cuisson à au moins deux résistances, et dispositif électronique de puissance Active EP2494846B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES200930899A ES2382862B1 (es) 2009-10-26 2009-10-26 Encimera de cocción con al menos dos elementos de calentamiento y una disposición de la electrónica de potencia
PCT/IB2010/054723 WO2011051856A1 (fr) 2009-10-26 2010-10-19 Plaque de cuisson à au moins deux résistances, et dispositif électronique de puissance

Publications (2)

Publication Number Publication Date
EP2494846A1 EP2494846A1 (fr) 2012-09-05
EP2494846B1 true EP2494846B1 (fr) 2015-07-22

Family

ID=43430383

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10776822.8A Active EP2494846B1 (fr) 2009-10-26 2010-10-19 Plaque de cuisson à au moins deux résistances, et dispositif électronique de puissance

Country Status (5)

Country Link
US (1) US10925122B2 (fr)
EP (1) EP2494846B1 (fr)
CN (1) CN102577597B (fr)
ES (2) ES2382862B1 (fr)
WO (1) WO2011051856A1 (fr)

Families Citing this family (12)

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EP2506671B2 (fr) 2011-03-29 2025-12-24 BSH Hausgeräte GmbH Dispositif de commutation
CN102809180B (zh) * 2012-08-07 2015-02-11 美的集团股份有限公司 均匀加热灶及其控制方法
WO2014033580A1 (fr) * 2012-08-27 2014-03-06 BSH Bosch und Siemens Hausgeräte GmbH Appareil électroménager
ES2538605B1 (es) * 2013-12-20 2016-04-15 Bsh Electrodomésticos España, S.A. Dispositivo de campo de cocción
US10440783B2 (en) * 2014-03-24 2019-10-08 BSH Hausgeräte GmbH Cooking appliance device having a self-controlling bypassing unit
US9752784B2 (en) 2014-07-21 2017-09-05 Electrolux Home Products, Inc. Heating element control circuit
ES2633517B1 (es) * 2016-03-21 2018-07-04 Bsh Electrodomésticos España, S.A. Dispositivo de aparato de cocción
EP3307017B1 (fr) * 2016-10-06 2019-05-22 Whirlpool Corporation Table de cuisson polyvalente à induction
ES2673131B1 (es) * 2016-12-19 2019-03-28 Bsh Electrodomesticos Espana Sa Dispositivo de aparato domestico de coccion por induccion con una matriz de elementos de calentamiento
US10993292B2 (en) * 2017-10-23 2021-04-27 Whirlpool Corporation System and method for tuning an induction circuit
ES2719129A1 (es) * 2018-01-08 2019-07-08 Bsh Electrodomesticos Espana Sa Dispositivo de campo de coccion
CN112020165B (zh) * 2019-05-30 2021-11-12 宁波方太厨具有限公司 一种电磁加热盘、电磁灶以及电磁灶的控制方法

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Also Published As

Publication number Publication date
CN102577597A (zh) 2012-07-11
WO2011051856A1 (fr) 2011-05-05
CN102577597B (zh) 2015-07-01
ES2545101T3 (es) 2015-09-08
ES2382862A1 (es) 2012-06-14
ES2382862B1 (es) 2013-05-08
EP2494846A1 (fr) 2012-09-05
US10925122B2 (en) 2021-02-16
US20120205365A1 (en) 2012-08-16

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