EP2774455A2 - Dispositif de chauffage par induction - Google Patents

Dispositif de chauffage par induction

Info

Publication number
EP2774455A2
EP2774455A2 EP12806668.5A EP12806668A EP2774455A2 EP 2774455 A2 EP2774455 A2 EP 2774455A2 EP 12806668 A EP12806668 A EP 12806668A EP 2774455 A2 EP2774455 A2 EP 2774455A2
Authority
EP
European Patent Office
Prior art keywords
heating
unit
control unit
induction
power
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Withdrawn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
EP12806668.5A
Other languages
German (de)
English (en)
Inventor
Sergio Llorente Gil
Daniel PALACIOS THOMAS
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
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 EP2774455A2 publication Critical patent/EP2774455A2/fr
Withdrawn legal-status Critical Current

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

Definitions

  • the invention is based on an induction heating device according to the preamble of claim 1.
  • the object of the invention is, in particular, a generic device with improved properties in terms of high electrical efficiency
  • Patent claim 1 solved, 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 a
  • Induction hob device comprising at least one heating frequency unit, at least one induction heating unit, which is intended to be operated by the heating frequency unit, and at least one control unit.
  • control unit be provided to the
  • Heating power is requested, which is available in a continuous operation of the heating frequency unit to the induction heating unit to operate pulsed.
  • Heating frequency unit is to be understood in particular as an electrical unit which generates an oscillating electrical signal, preferably with a switching frequency of at least 1 kHz, in particular of at least 10 kHz, advantageously of at least 20 kHz, in particular of not more than 100 kHz, for an induction heating unit.
  • the heating frequency unit is intended to be one of which
  • the heating frequency unit comprises 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 parallel to the bidirectional unipolar switches
  • Damping capacity which is in particular formed by at least one capacitor has.
  • a high-frequency power supply of the induction heating unit can be provided.
  • An "induction heating unit” is to be understood in particular as a unit having at least one induction heating element. In particular, in an operating state in which the induction heating unit with high-frequency
  • induction heating element is to be understood, in particular, as a wound electrical conductor, preferably in the form of a circular disk, which is arranged in at least one
  • Indutationsheizelement is preferably intended to convert electrical energy into a magnetic alternating field, which is intended to be in 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 an induction heating device and which is preferably provided for, at least the
  • Heating frequency unit to control and / or to regulate.
  • the heating frequency unit to control and / or to regulate.
  • Control unit a computing unit and in particular in addition to the arithmetic unit, a memory unit with a stored therein control and / or control program, which is intended to be executed by the arithmetic unit.
  • provided is meant in particular specially programmed, designed and / or equipped.
  • Required heating power is to be understood in particular as an adjustment made by an operator via an operating unit.
  • a value of an electrical power in particular in watts, and / or a power level, which is preferably assigned by the control unit to an electrical power, can be set.
  • the requested heating power can be set by the control unit as part of a cooking program.
  • a heating power is particularly available in a "continuous operation" when an electrical efficiency of a whole used heating electronics, in particular at least the
  • a rectifier unit, the induction heating unit and / or the control unit is greater than at least 85%, in particular at least 90%, advantageously at least 93%, preferably at least 95%.
  • a rectifier unit, the induction heating unit and / or the control unit is greater than at least 85%, in particular at least 90%, advantageously at least 93%, preferably at least 95%.
  • Power loss of the heating electronics a maximum of 15%, in particular a maximum of 10%, advantageously a maximum of 7%, preferably a maximum of 5%, a heating power over the
  • Induction heating unit is delivered to a heating medium.
  • a heating medium In particular, one is
  • a "pulsed operation” is to be understood in particular as an operating state in which a heating frequency unit alternately, preferably periodically alternately, provides no current in pulsed phase high frequency alternating current or in idle phases ..
  • a pulse phase duration is at least 0.1 s, in particular at least 0.5 s
  • the control unit is provided to select a pulse power, ie heat power during pulse phases, such that a heating power averaged over time
  • the heating powers are at least essentially the same in different, in particular successive, preferably immediately successive, pulse phases, below that two values are "essentially” the same, it shall be understood in particular that a difference in the W maximum of 10%, in particular not more than 5%, preferably not more than 1% of a sum of the values.
  • a resting phase duration in at least one operating state is at most 100%, in particular at most 50%, advantageously at most 25%, preferably at most 10%, of a duration of a preceding pulse phase.
  • a "low to medium” heating power is to be understood in particular to mean a heating power which corresponds to a maximum of 70%, in particular a maximum of 50%, preferably a maximum of 30% of a maximum heating power, in particular a maximum power of the heating frequency unit 1, 5 kW, advantageously at most 1.2 kW, preferably at most 1 kW.
  • Operating mode is provided to set a pulse power as a function of the requested heating power via at least one assignment function.
  • the mathematical function is stored in a memory unit of the control unit, in particular in the form of a table,
  • the assignment function is designed as a step function, alternatively any, preferably monotonous, in particular monotonically increasing Functions are conceivable, in particular a simple control can be achieved.
  • control unit be provided to assign at least two, in particular at least three, advantageously at least four, subregions of an entire range of possible heating powers each having different pulse powers.
  • a "subarea" of a region should in particular be understood to mean a coherent region which lies completely within the region. ⁇ br/> ⁇ br/>
  • the subregions cover the entire region together.
  • ⁇ / RTI> Preferably, an overlap of different subregions is limited to their edges
  • control unit be in at least one
  • Operating state is provided to at least one of the sub-areas to assign a pulse power that is at least 1%, in particular at least 3%, preferably at least 8% greater than a maximum heat output of the sub-area. In particular, high efficiency can be achieved.
  • a pulse phase spacing at least as a function of at least one characteristic, in particular a characteristic which assigns a power to a minimum pulse phase spacing, preferably a flicker characteristic,
  • a "pulse phase distance” is to be understood as meaning, in particular, a distance between start times of two pulse phases, preferably immediately consecutive pulse phases
  • a flicker characteristic should in particular be understood as a characteristic curve which determines, at least, how large a pulse-phase distance as a function of a pulse power should be to disturbances in a power grid and / or
  • Comfort restrictions such as flickering light
  • increased comfort and / or improved network stability can be achieved.
  • control unit be provided, at least in the at least one, at least as a function of an operator input
  • the induction heating device has at least one
  • Operating element in particular a touch-sensitive control surface and / or a menu item in a control menu, which is provided to provide the control unit with a signal for switching.
  • increased comfort can be achieved.
  • control unit is provided to define at least one pulse phase duration and / or at least one pulse power as a function of at least one time characteristic. Under a "time characteristic" should
  • a parameter to be understood that reflects a time period and / or a time.
  • the time parameter is intended to specify a maximum and / or minimum and / or exact idle-phase duration.
  • the time parameter has a value of at least 0 s, in particular at least 2 s, advantageously at least 5 s, in particular a maximum of 30 s, advantageously a maximum of 20 s, preferably a maximum of 10 s.
  • the control unit is to
  • Such a device is particularly advantageously arranged in an induction hob and / or in an oven with induction heating.
  • FIG. 1 shows a domestic appliance 10 designed as an induction hob, with a domestic appliance 10
  • Induction heater 12 has four formed as an inverter
  • the induction heating device 12 has four induction heating units 30, 32, 34, 36 formed as inductors, which are each intended to be operated by different heating frequency units 20, 22, 24, 26.
  • the induction heating units 30, 32, 34, 36 are disposed below a cooking plate and are intended to plate on the hob set Garware, which is positioned above the induction heating units 30, 32, 34, 36 to heat.
  • the induction heating device 12 has a control unit 14 and an operator interface 16.
  • the user interface 16 is intended to allow an operator to control heating power for the
  • Induction heating units 30, 32, 34, 36 to request and currently set
  • the control unit 14 is provided to process inputs of the user interface 16, to control displays of the display units of the user interface 16 and to control the heating frequency units 20, 22, 24, 26 such that the induction heating units 30, 32, 34, 36 deliver powers on average that correspond to requested heating powers via the user interface 16.
  • the control unit 14 is provided to the heating frequency units 20, 22, 24, 26 respectively in an operating mode in which a heating power P me on is requested for the corresponding induction heating unit 30, 32, 34, 36, in a continuous operation of the heating frequency unit 20th , 22, 24, 26 to the induction heating unit 30, 32, 34, 36 is available to operate pulsed ( Figure 2).
  • the induction heating unit 30, 32, 34, 36 is provided to generate in the operating mode periodically alternately during pulse phases 60, 62 with a pulse phase duration t 0 N high-frequency alternating current, which leads to a pulse power P pu i s , and during resting phases 61, 63 with a rest period t off no high-frequency alternating current to produce.
  • a permanently deliverable power is determined by a performance-dependent efficiency ⁇ of electronics of the induction heating device 12 (FIG. 5).
  • ⁇ performance-dependent efficiency
  • the control unit 14 is provided in the one operating mode to a pulse power Ppuis in response to the requested heating power P me on a
  • the control unit 14 is provided to two
  • Divisions 52, 54 of an entire range 50 of possible heating powers P mean each assign different pulse powers P 52 , P 54 .
  • the control unit 14 is provided in the one operating state to allocate a pulse power P 52 to the partial area 52 which is 10% greater than a maximum heating power P 5 2max of the partial area 52.
  • a pulse power P 54 of the partial area 54 corresponds to a maximum heating power P5 4 max of the partial area 54.
  • the partial area 52 extends from 0 W to 2000 W.
  • the partial area 52 is assigned a pulse power P 52 of 2200 W.
  • the partial area 54 extends from 2000 W to 3300 W.
  • the partial area 54 is assigned a pulse power P 54 of 3300 W.
  • An upper limit of the partial area 54 corresponds to a maximum heating power of the heating frequency units 20, 22, 24, 26.
  • the control unit 14 is provided in the one operating mode to a
  • Pulse phase distance t F icker depending on a Flickerkennline f F ii C ker set.
  • FIG. 4 shows, by way of example, a patch characteristic f F ii C ker, as defined by the national standard. The following information refers to the Spanish Flickernorm.
  • the control unit 14 assigns the pulse power P 52 a pulse phase distance t 52 of 32 s and the pulse power P 54 to a pulse phase distance t 54 of 170 s.
  • Subareas 52, 54, the associated pulse powers P 52 , P 54 and the associated pulse phase intervals t 52 , t 54 are stored in an allocation table in a memory unit of the control unit 14.
  • a requested heat output P me on becomes such a
  • assigned to icker a pulse phase duration t 0 N is after the
  • control unit 14 is provided depending on a
  • assignment function f 2 can be designed as a step function with more than 2 stages, in particular any number of stages, for example 4 stages.
  • the assignment function f 3 may be formed as a continuous function, wherein a pulse power P pU
  • Control unit 14 is provided, depending on an operator input via the operator interface 16 to select one of different assignment functions that are provided by the control unit for election. For example, an operator may specify a number of levels and the control unit calculates and / or determines a suitably suitable staircase function.
  • the pulsed operation produces a periodically fluctuating temperature profile with a fluctuation range ⁇ (FIG. 6).
  • ⁇ fluctuation range
  • the control unit 14 In order to keep the fluctuation range ⁇ low, can be provided in a further variant, the control unit 14 to
  • control unit 14 is provided for the Schufrequentsburg 20, 22, 24, 26 at heating power P m ean, which are greater than low to medium heat outputs, ie, for example, greater than 1000 W to operate continuously.
  • Embodiments of the invention are also conceivable in which a heating frequency unit is provided to operate a plurality of induction heating units alternately.
  • Heating frequency unit P 52 Pulse power

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Induction Heating (AREA)
  • Induction Heating Cooking Devices (AREA)

Abstract

L'invention concerne un dispositif de chauffage par induction, en particulier un dispositif de plaque de cuisson à induction comprenant au moins une unité à fréquence de chauffage (20, 22, 24, 26), au moins une unité de chauffage à induction (30, 32, 34, 36) fonctionnant par l'intermédiaire de l'unité à fréquence de chauffage (20, 22, 24, 26), et au moins une unité de commande (14). Pour obtenir une efficacité accrue, l'unité de commande est prévue pour faire fonctionner l'unité à fréquence de chauffage (20, 22, 24, 26) par impulsion au moins dans un mode de fonctionnement dans lequel une puissance de chauffage (Pmean) exigée pour l'unité ou les unités de chauffage à induction (30, 32, 34, 36) peut être fournie pendant un fonctionnement continu par l'unité à fréquence de chauffage (20, 22, 24, 26) à l'unité de chauffage par induction (30, 32, 34, 36).
EP12806668.5A 2011-11-04 2012-10-30 Dispositif de chauffage par induction Withdrawn EP2774455A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES201131768 2011-11-04
PCT/IB2012/055994 WO2013064967A2 (fr) 2011-11-04 2012-10-30 Dispositif de chauffage par induction

Publications (1)

Publication Number Publication Date
EP2774455A2 true EP2774455A2 (fr) 2014-09-10

Family

ID=47436123

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12806668.5A Withdrawn EP2774455A2 (fr) 2011-11-04 2012-10-30 Dispositif de chauffage par induction

Country Status (3)

Country Link
EP (1) EP2774455A2 (fr)
CN (1) CN103891401B (fr)
WO (1) WO2013064967A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105338674B (zh) * 2014-07-02 2019-04-30 浙江苏泊尔家电制造有限公司 一种电磁加热方法及采用该方法的电磁加热的电饭煲
CN106247416B (zh) * 2016-08-10 2018-10-23 深圳拓邦股份有限公司 多灶头电磁炉及其功率控制方法
CN107172732A (zh) * 2017-06-06 2017-09-15 浙江绍兴苏泊尔生活电器有限公司 电磁炉的工作控制方法和电磁炉

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001052602A1 (fr) * 2000-01-13 2001-07-19 Electric Power Research Institute, Inc. Appareil et procede de chauffage a induction

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE602007003672D1 (de) * 2007-01-23 2010-01-21 Teka Ind Sa Verfahren zur Regelung eines Induktionskochfeldes und zur Ausführung dieses Verfahrens adaptiertes Induktionskochfeld
DE102008042512A1 (de) * 2008-09-30 2010-04-01 BSH Bosch und Siemens Hausgeräte GmbH Kochfeld und Verfahren zum Betreiben eines Kochfelds
ATE520279T1 (de) * 2008-12-22 2011-08-15 Fagorbrandt Sas Verfahren zur stromversorgung mit der leistung von zwei induktoren und kochgerät, bei dem dieses verfahren umgesetzt ist

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001052602A1 (fr) * 2000-01-13 2001-07-19 Electric Power Research Institute, Inc. Appareil et procede de chauffage a induction

Also Published As

Publication number Publication date
WO2013064967A2 (fr) 2013-05-10
WO2013064967A3 (fr) 2013-08-15
CN103891401A (zh) 2014-06-25
CN103891401B (zh) 2016-03-09

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