EP2506667B1 - Dispositif de chauffage à induction - Google Patents

Dispositif de chauffage à induction Download PDF

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Publication number
EP2506667B1
EP2506667B1 EP12158709.1A EP12158709A EP2506667B1 EP 2506667 B1 EP2506667 B1 EP 2506667B1 EP 12158709 A EP12158709 A EP 12158709A EP 2506667 B1 EP2506667 B1 EP 2506667B1
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EP
European Patent Office
Prior art keywords
induction heating
unit
induction
heating units
units
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Active
Application number
EP12158709.1A
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German (de)
English (en)
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EP2506667B2 (fr
EP2506667A3 (fr
EP2506667A2 (fr
Inventor
Miguel Angel BUÑUEL MAGDALENA
Carmelo Pina Gadea
Diego Puyal Puente
Julio Rivera Peman
Jose-Ramon Garcia Jimenez
Jose Andres Garcia Martinez
Ignacio Garde Aranda
Pablo Jesus Hernandez Blasco
Sergio Llorente Gil
Alfonso Lorente Perez
David Ortiz Sainz
Ramon Peinado Adiego
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BSH Hausgeraete GmbH
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BSH Hausgeraete GmbH
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Application filed by BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Publication of EP2506667A2 publication Critical patent/EP2506667A2/fr
Publication of EP2506667A3 publication Critical patent/EP2506667A3/fr
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    • 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 heaters are known in the art which have a plurality of induction heating elements which are supplied in parallel by an inverter.
  • the object of the invention is in particular to provide a generic device with improved properties in terms of high flexibility.
  • 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 one heating frequency unit and at least three induction heating units, which are assigned to the heating frequency unit.
  • the induction heating device has at least one control unit which is at least provided to operate at least two of the induction heating units in sections in at least one operating mode.
  • 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 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 at least one inverter, which preferably has at least two, preferably series-connected, bidirectional unipolar switches, in particular of a transistor and a parallel diode are formed, and particularly advantageous at least in each case a parallel to the bidirectional unipolar switches switched damping capacitance, which is in particular formed by at least one capacitor comprises.
  • a high-frequency power supply of the induction heating unit can be provided.
  • a voltage tap of the radio-frequency unit is arranged in particular at a common contact point of two bidirectional unipolar switches.
  • An "induction heating unit” is to be understood in particular as a unit having at least one induction heating element.
  • induction heating element is to be understood in particular as a wound electrical conductor, preferably in the form of a circular disk through which high-frequency alternating current flows in at least one operating state.
  • the induction heating element is preferably provided to convert electrical energy into an alternating magnetic field, which is intended to cause in a metallic, preferably at least partially ferromagnetic, heating means, in particular cooking utensils, eddy currents and / or remagnetization effects, which are converted into heat.
  • the induction heating device has at least one switching arrangement with at least two switching elements which differ from switching elements of a heating frequency unit, which is in particular provided to produce at least one direct connection from the heating frequency unit, preferably the voltage tap of the heating frequency unit, to at least one of the induction heating units.
  • a "direct connection” is to be understood in particular as meaning an electrical connection which, at least in an operating state with a current flow of alternating current via the connection with a frequency between 1 kHz and 100 kHz, has an impedance which is smaller than its magnitude 10 V / A, in particular less than 1 V / A, preferably less than 0.1 V / A and whose amount fluctuates in particular over a frequency range from 1 kHz to 100 kHz by a maximum of 10%, preferably a maximum of 3%.
  • switching element is intended in particular, an electrical component with at least two electrical contacts and at least two states are understood.
  • a “contact” is to be understood in particular an electrical connection point of an electrical component.
  • a switching element has a control member which can be controlled with low voltage, in particular a voltage between 12 V and 24 V, and causes a change of state of the switching element.
  • a switching element is designed as a relay, which is preferably designed as a single or multi-pole power switch or as a single or multi-pole changeover switch.
  • a "control unit” should in particular be understood as an electronic unit which is preferably at least partially integrated in a control and / or regulating unit of the induction heating device and which is preferably provided to control and / or regulate at least the heating frequency unit and the switching arrangement.
  • the control unit controls the control elements of the switching elements of the switching arrangement in order to establish at least one connection between the heating frequency unit and at least one of the induction heating units.
  • 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 induction heating unit is alternately, preferably periodically alternating, active or inactive.
  • the induction heating unit is “active” should be understood in particular that it is continuously supplied with high-frequency alternating current over a period of at least 10 ms.
  • the induction heating unit is “inactive” is to be understood in particular that it differs from an active induction heating unit and in particular over a period of at least 10 ms less than 10 W, in particular less than 1 W and preferably less than 0.1 W. at electrical power absorbs.
  • An “operating section” should be understood in particular to be a time range in which the induction heating unit is active.
  • operating sections of the one induction heating unit are different from operating sections of the other induction heating unit.
  • a first and a second operating section “differ”, it should be understood in particular that a starting point of the second operating section is behind an end point of the first operating section.
  • a flexible supply of the induction heating units can be achieved.
  • At least two of the induction heating units form a common heating area.
  • a “heating zone” is to be understood in particular as meaning an area of action of the magnetic alternating field generated by the induction heating unit in at least one operating state.
  • An “effective range” is to be understood in particular as a range in which a magnetic flux density corresponds to at least 30%, in particular at least 45%, advantageously at least 60% and preferably at least 75% of a momentary maximum magnetic flux density of the alternating magnetic field.
  • a heating area is an area that is in an operating condition directly above the induction heating unit on a cooktop panel.
  • two induction heating units form a "common" heating area
  • the heating areas of both induction heating units are at least 2 cm apart, preferably at most 1 cm, advantageously at most 0.1 cm apart and preferably partially overlap in at least one area.
  • the at least two induction heating units are arranged concentrically.
  • the control unit is provided, in at least one operating mode, to operate the at least two induction heating units in identical operating sections. In particular, a uniform heating of a large area can be achieved.
  • At least two of the induction heating units have a common contact.
  • a "common contact” should in particular be understood as a contact point to which the induction heating units are directly connected in any operating state which preferably differs from an operating state with a defect. In particular, costs can be reduced.
  • the induction heating unit has a resonance unit which is directly connected to the common contact in at least one operating state.
  • a "resonance unit” is to be understood as meaning, in particular, a unit which has at least one resonance capacity, preferably of at least one Capacitor is formed, which is preferably different from a damping capacity and / or a capacitance, which is connected in parallel to a switching element.
  • a resonant capacitance is formed by a combination of series and parallel circuits of a plurality of capacitors.
  • the resonance capacity is in particular part of an electrical resonant circuit, in particular of an electrical series resonant circuit.
  • the resonance capacitance in at least one operating state is connected in series with the induction heating unit and is particularly advantageously intended to be charged via the induction heating unit by at least one heating frequency unit, in particular if the induction heating unit is raised to a higher electrical potential by the switching arrangement is placed.
  • the resonance capacity is arranged in particular on a side of the induction heating unit facing away from the frequency unit, viewed in the direction of a line path.
  • an induction heating unit is operated in a full bridge circuit.
  • the induction heating unit is arranged together with a, preferably in series with the induction heating unit, resonant capacitance between two voltage dividing units formed by Schufrequenzüen in the bridge branch.
  • an induction heating unit is operated in a half-bridge circuit.
  • the induction heating unit is arranged between a voltage divider formed by the heating frequency unit and a voltage divider formed by two resonance capacitances in the bridge branch. In particular, costs can be reduced.
  • control unit is provided, at least in an operating mode with section-wise operation of at least two induction heating units, starting points of two successive operating sections of any Indudictionsweechen with at least 50 ms, preferably at least 100 ms to space.
  • a distance between two starting points of directly successive operating sections of any induction heating units is a multiple of 50 ms or a multiple of 100 ms.
  • an overload of switching elements, in particular relays can be avoided.
  • control unit is provided, at least in an operating mode with section-wise operation of at least two induction heating units, successive starting points of at least two, in particular at least five, advantageously at least ten and preferably of all successive operating sections of an induction heating unit with a maximum of 7 s, in particular a maximum of 5 s, advantageously a maximum of 3 s, and preferably a maximum of 2 s, to space.
  • a maximum of 7 s in particular a maximum of 5 s, advantageously a maximum of 3 s, and preferably a maximum of 2 s
  • the induction heating device has at least two switching elements, which are arranged between the heating frequency unit and at least one of the induction heating units.
  • the switching elements are part of the switching arrangement and / or differ from switching elements of a heating frequency unit.
  • the switching elements are designed as single or multi-pole changeover switch.
  • the first switching element with the Wienfrequenzü with the first switching element, the second switching element and the second switching element, the induction heating directly connected.
  • a low switching frequency and thus a low wear of the switching elements can be achieved.
  • FIG. 1 shows a designed as an induction hob home appliance 10a with an induction hob as trained induction heating device 12a with five induction heating units 20a, 22a, 24a, 26a, 28a, each having an induction heating element designed as an inductor.
  • the induction heating units 20a, 22a, 24a, 26a, 28a are disposed below a cooktop panel 14a.
  • heating areas 30a, 32a, 34a, 36a, 38a formed directly above the induction heating units 20a, 22a, 24a, 26a, 28a are arranged as cooking zones.
  • the heating areas 36a, 38a of the induction heating units 26a, 28a are concentrically arranged to form a common heating area 39a.
  • the induction heating units 20a, 22a, 24a, 26a, 28a are provided to heat cooking utensils placed on the induction heating unit 20a, 22a, 24a, 26a, 28a, 30a, 32a, 34a, 36a, 38a.
  • the induction heating device 12a has a power module 18a operated by a single phase 16a of a three-phase domestic connection, which is intended to provide the induction heating units 20a, 22a, 24a, 26a, 28a with high-frequency alternating current with a frequency between 20 kHz and 100 kHz to supply.
  • the power module 18a has a heating frequency unit 60a, to which the induction heating units 20a, 22a, 24a, 26a, 28a are assigned ( Fig.
  • the frequency is dependent on a heating power demanded for the heating area 30a, 32a, 34a, 36a, 38a via an operating unit 62a and a cooking utensil arranged on the heating area 30a, 32a, 34a, 36a, 38a and is controlled by a control unit 64a Induction heater 12a determined.
  • the control unit 64a has an arithmetic unit, a memory unit and an operating program stored in the memory unit, which is intended to be executed by the arithmetic unit.
  • FIG. 2 shows a first circuit for the induction heater 12a, which in an induction hob after FIG. 1 Can be used.
  • a voltage applied to a phase 16a mains voltage between 220 V and 230 V with a mains frequency between 49 Hz and 51 Hz is rectified in a rectifier 66a and partially stored in a buffer capacity 68a.
  • the poles of the buffer capacitor 68a form two external contacts 70a, 72a between which a pulsating DC voltage is applied.
  • the heating frequency unit 60a is arranged between the external contacts 70a, 72a and converts the pulsating DC voltage into a high-frequency alternating current.
  • the heating frequency unit 60a has two switching elements 74a, 76a which are connected in series between the external contacts 70a, 72a and designed as bidirectional unipolar switches, each having a parallel-connected damping capacitor 78a, 80a.
  • the switching elements 74a, 76a are each formed by an IGBT 82a, 84a (insulated gate bipolar transistor) and a parallel-connected diode 86a, 88a.
  • a voltage tap 90a is disposed at a common contact of the two IGBTs 82a, 84a.
  • the control unit 64a causes a high-frequency alternating voltage by alternately high-frequency driving of the two IGBTs 82a, 84a at the voltage tap 90a, which is followed by a high-frequency alternating current when an induction heating unit 20a, 22a, 24a, 26a, 28a is connected.
  • the voltage tap 90a of the heating frequency unit 60a is connected to an input contact 96a of a switching arrangement 92a of the induction heater 12a.
  • the switching arrangement 92a has five switching elements 40a, 42a, 44a, 46a, 48a, which are designed as, designed as a single-pole switch, relays.
  • a first of two contacts of the switching elements 40a, 42a, 44a, 46a, 48a (the left-hand contact in the illustration, respectively) is connected directly to the input contact 96a.
  • a second contact of the switching elements 40a, 42a, 44a, 46a, 48a is in each case connected to a first contact of one of the five induction heating units 20a, 22a, 24a, 26a, 28a.
  • the switching elements 40a, 42a, 44a, 46a, 48a are open in a normal state and are closed by control of the control unit 64a.
  • the control unit 64a is provided to connect induction heating units 20a, 22a, 24a, 26a, 28a directly to the heating frequency unit 60a by driving the switching elements 40a, 42a, 44a, 46a, 48a.
  • Second contacts of the induction heating units 20a, 22a, 24a, 26a, 28a are directly connected to each other and form a common contact 94a.
  • a resonance unit 50a which is formed by two resonance capacitances 52a, 54a of substantially equal size, connected in series.
  • the resonance capacitances 52a, 54a are each formed by a single capacitor.
  • a first contact of the first resonance capacitance 52a is directly connected to the first external contact 70a, and a first contact of the second resonance capacitance 54a is directly connected to the second external contact 72a.
  • the second contacts of the resonance capacitances 52a, 54a are directly connected to the common contact 94a of the induction heating units 20a, 22a, 24a, 26a, 28a.
  • the induction heating units 26a, 28a form a common heating area 39a.
  • This circuit can be arbitrarily extended to more than five induction heating units or limited to four or three induction heating units. Embodiments are also conceivable in which no two or more than two of the induction heating units form a common heating area.
  • FIGS. 3 to 5 Further embodiments of the invention are shown. The following descriptions are essentially limited to the differences between the embodiments, with respect to the same components, features and functions on the description of the other embodiments, in particular the FIGS. 1 and 2 , can be referenced. To distinguish the embodiments, the letter a in the reference numerals of the embodiment in the FIGS. 1 and 2 by the letters b, c and d in the reference numerals of the embodiments of FIGS. 3 to 5 replaced. With regard to identically designated components, in particular with regard to components with the same reference numerals, can in principle also to the drawings and / or the description of the other embodiments, in particular the FIGS. 1 and 2 , to get expelled.
  • the FIG. 3 shows an alternative circuit of an induction heater 12b.
  • the induction heating device 12b has five induction heating units 20b, 22b, 24b, 26b, 28b, each formed by a single inductor formed as an induction heating element, associated with a heating frequency unit 60b.
  • a switching arrangement 92b of the induction heating device 12b which is directly connected to a voltage tap 90b of the heating frequency unit 60b, has four switching elements 40b, 42b, 44b, 46b acting as a single pole changeover switch trained, relays are formed. Switching elements designed as single-pole changeover switches are intended to connect a first contact directly to a second contact in a first stable state and to connect the first and a third contact directly in a second stable state.
  • a control unit 64b of the induction heating device 12b is provided to make direct connections between the heating frequency unit 60b and the induction heating units 20b, 22b, 24b, 26b, 28b by driving the switching elements 40b, 42b, 44b, 46b of the switching arrangement 92b.
  • a first contact of a first switching element 40b is directly connected to the voltage tap 90b.
  • a first contact of a second switching element 42b is directly connected to a second contact of the first switching element 40b, and a first contact of a third switching element 44b is directly connected to a third contact of the first switching element 40b.
  • a first contact of a fourth switching element 46b is connected to a third contact of the third switching element 44b.
  • a first contact of one of the induction heating units 20b, 22b, 24b, 26b, 28b is directly connected to each of the second and third contacts of the second and fourth switching elements 42b, 46b and the second contact of the third switching element 44b.
  • two switching elements 30b, 32b and 30b, 36b respectively and three switching elements 30b, 36b, 38b are disposed between the two induction heating units 26b, 28b and the heating frequency unit 60b.
  • the second contacts of the induction heating units 20b, 22b, 24b, 26b, 28b are directly connected to each other and form a common contact 94b, which is directly analogous to a resonance unit 50b FIG. 2 connected is.
  • the two induction heating units 26b, 28b form a common heating area 39b.
  • the fourth switching element 46b of the switching arrangement is replaced by two switching elements, which are designed as a single-pole power switch. Two directly connected first contacts of the two switching elements would take the place of the first contact of the fourth switching element 46b and the second contacts of the two switching elements would each form the second and third contacts of the fourth switching element 46b.
  • modifications of the circuit with only three or four or with more than five induction heating units are conceivable.
  • the fourth switching element 46b and the fifth induction heating unit 28b would be omitted and the first contact of the fourth induction heating unit 26b would be directly connected to the third contact of the third switching element 44b.
  • the third and fourth switching elements 44b, 46b and the fourth and fifth induction heating units 26b, 28b would be omitted and the first contact of the third induction heating unit 24b would be directly connected to the third contact of the first switching element 40b.
  • the induction heater 12c has four induction heating units 20c, 22c, 24c, 26c, each having an induction heating element formed as an inductor, associated with a single heating frequency unit 60c of the induction heater 12c and connectable to the heating frequency unit 60c via a first switching arrangement 92c of the induction heater 12c.
  • the switching arrangement 92c may be analogous to the switching arrangements 92a, 92b FIG. 2 or FIG. 3 or a combination of these switch assemblies 92a, 92b.
  • Two pairs of induction heating units 20c, 22c and 24c, 26c each have a common contact 94c, 95c.
  • the induction heating device 12c has first and second resonance units 50c, 51c and a second switching arrangement 93c which is provided to associate either the first or the second resonance unit 50c, 51c to the pairs of induction heating units 20c, 22c and 24c, 26c ,
  • the resonance units 50c, 51c are both of the type of the resonance unit 50a FIG. 2 , but have different sized resonance capacitances 52c, 54c and 53c, 55c.
  • the second switching arrangement 93c has two switching elements 56c, 58c which are designed as relays formed as single-pole changeover switches.
  • a first contact of the switching elements 56c, 58c is directly connected to a common contact 94c, 95c of one of the pairs of induction heating units 20c, 22c and 24c, 26c, respectively, and the second and third contacts are respectively directly connected to the first and second resonance units 50c, 51 c connected.
  • the second switching arrangement 93c like the first switching arrangement 92c, is controlled by a control unit 64c of the induction heating apparatus 12c. An assignment of the resonance units 50c, 51c to the pairs of induction heating units 20c, 22c and 24c, 26c takes place in FIG Dependence on a power demanded for the induction heating units 20c, 22c, 24c, 26c.
  • any other numbers of induction heating units each have a common contact that can be connected to either the first or the second resonance unit 50c, 51c.
  • Embodiments are also conceivable in which groups of induction heating units and / or individual induction heating units, ie without additional switching elements, are directly connected to the resonance units 50c, 51c. Also, designs with more than two resonance units are conceivable.
  • An induction heating device 12d has four induction heating units 20d, 22d, 24d, 26d, which are associated with a first heating frequency unit 60d of the induction heating device 12d and can be directly connected to the induction heating device 12d via a switching arrangement 92d.
  • Two pairs of induction heating units 20d, 22d and 24d, 26d each have a common contact 94d, 95d directly connected to each one of two resonance units 50d, 51d.
  • the resonance units 50d, 51d are formed by a single resonance capacitor 52d, 53d, each consisting of a single capacitor.
  • the size of the resonance capacitors 52d, 53d is in this case adapted to the properties of the associated induction heating units 20d, 22d or 24d, 26d, that is, for example, to their inductance.
  • a first contact of the resonance units 50d, 51d is directly connected to the common contact 94d, 95d of one of the pairs of induction heating units 20d, 22d and 24d, 26d and a second contact of the resonance units 50d, 51d is directly connected to a voltage tap 91d of a second heating frequency unit 61d , which is constructed like the heating frequency unit 60d and 60a, respectively.
  • a control unit 64d of the induction heating device 12d is provided to drive the switching arrangement 92d and the two heating frequency units 60d, 61d.
  • FIG. 4 Switching elements are provided which allow an assignment of groups of induction heating units in common contact with the different resonance units. Likewise, everyone can Induction heating units have a common contact, which is connected directly to a single resonance unit.
  • relays which are designed as single-pole power-on switches can also be replaced by semiconductor switches, such as transistors, in particular IGBTs.
  • common contact of the induction heating units may connect the first contacts of the induction heating units and the voltage tap of the heating frequency unit, and a switching arrangement is connected to the second contacts of the induction heating units and is intended to establish a direct connection between at least one of the induction heating units and at least one of the resonance units.
  • FIG. 6 is a possible operation of the example of the first embodiment, identified by the reference numeral "a", shown.
  • the control unit 64a is provided, in an operation mode in which two or more of the induction heating units 20a, 22a, 24a, 26a, 28a are requested by an operator, the induction heating units 20a, 22a, 24a, 26a, 28a for the one Performance is required to operate in sections.
  • the control unit 64a is provided to space starting points 102a, 106a, 110a, 114a of two successive operating sections 100a, 104a, 108a, 112a of any induction heating units 20a, 22a, 24a, 26a, 28a by at least 100 ms and starting points 102a, 114a of two successive operating sections 100a, 112a of an induction heating unit 20a, 22a, 24a, 26a, 28a of 2 s.
  • the three induction heating units 20a, 22a and 26a are operated in sections.
  • the first (upper) diagram of the FIG. 6 shows a course of the provided over the heating frequency unit 60a power P as a function of time t.
  • a first operating section 100a the switching element 40a of the switching arrangement is closed, so that the first induction heating unit 20a is directly connected to the heating frequency unit 60a and is supplied with high-frequency alternating current.
  • the remaining switching elements 42a, 44a, 46a, 48a are open.
  • a second operating section 104a follows, in which the switching element 42a of the switching arrangement 92a is closed and the remaining switching elements 40a, 44a, 46a, 48a are open and thus the induction heating unit 22a is directly connected to the heating frequency unit 60a.
  • the starting point 106a of the second operating portion 104a is 100 ms to the starting point 102a of the first operating portion 100a spaced.
  • a third operation section 108a follows, in which the induction heating unit 26a is directly connected to the heating frequency unit 60a.
  • the switching element 46a is closed and the remaining switching elements 40a, 42a, 44a, 48a are open.
  • the starting point 110a of the third operating section is spaced at 700 ms from the starting point 106a of the second operating section 104a.
  • a fourth operating section 112a follows, in which again the induction heating unit 20a is connected in a known manner directly to the heating frequency unit 60a.
  • the starting point 114a of the fourth operating section 112a is spaced at 1.2 s from the starting point 110a of the third operating section 108a and at 2 s from the starting point 102a of the first operating section 100a.
  • the operation of the induction heating units 20a, 22a, 26a is periodically continued.
  • the switching elements 40a, 42a, 44a, 46a, 48a of the switching arrangement 92a are respectively switched over. Such switching over takes place, as shown in detail in the second (lower) diagram, in each case during a minimum point 116a of the pulsating DC voltage U which is present between the external contacts 70a, 72a ( FIG. 7 ).
  • response time 118a of the switching elements 40a, 42a, 44a, 46a, 48a are estimated.
  • the reaction time 118a ie from 3.5 ms before a minimum point 116a to 3.5 ms after the minimum point 116a
  • the heating frequency unit 60a is switched off, ie the IGBTs 82a, 84a receive no control signals.
  • the operating sections 100a, 104a, 108a, 112a of different induction heating units 20a, 22a, 26a are thus at least 7 ms apart.
  • a length of an operating portion 100a, 104a, 108a, 112a of an induction heating unit 20a, 22a, 24a, 26a, 28a and a frequency set therein at the heating frequency unit 60a are of a power required for the induction heating unit 20a, 22a, 24a, 26a, 28a a sum of the requested performances for all to be operated induction heating units 20a, 22a, 24a, 26a, 28a dependent.
  • the boundary condition is met that the powers to the individual operating sections 100a, 104a, 108a, 112a deviate less than 10% from the required total power.
  • control unit is in an arrangement in which two induction heating units form a common heating area and in which a first contact of the induction heating units is directly connected to a second contact of a first and second single-pole switch, respectively, and the first contacts of the first and second single-pole switches are direct are connected to each other, provided in an operating section in which a power is required for both induction heating units to operate the two induction heating units in identical operating sections.

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

Claims (8)

  1. Dispositif de champ de cuisson à induction avec au moins une unité de fréquence de chauffe (60a ; 60b ; 60c ; 60d, 61 d) et avec au moins trois unités de chauffe à induction (20a, 22a, 24a, 26a, 28a; 20b, 22b, 24b, 26b, 28b ; 20c, 22c, 24c, 26c; 20d, 22d, 24d, 26d) affectées à l'unité de fréquence de chauffe (60a ; 60b ; 60c ; 60d, 61 d), dans lequel dans chaque état de fonctionnement dans lequel une des unités de chauffe à induction (20a, 22a, 24a, 26a, 28a ; 20b, 22b, 24b, 26b, 28b ; 20c, 22c, 24c, 26c ; 20d, 22d, 24d, 26d) est alimentée en courant alternatif à haute fréquence, l'unité de fréquence de chauffe (60a ; 60b ; 60c ; 60d, 61 d) est directement reliée à l'unité de chauffe à induction (20a, 22a, 24a, 26a, 28a ; 20b, 22b, 24b, 26b, 28b ;20c, 22c, 24c, 26c ; 20d, 22d, 24d, 26d), et avec au moins une unité de commande (64a ; 64b ; 64c ; 64d) au moins prévue afin d'exploiter de manière intermittente, dans au moins un mode de fonctionnement au moins deux des unités de chauffe à induction (20a, 22a, 24a, 26a, 28a ; 20b, 22b, 24b, 26b, 28b ; 20c, 22c, 24c, 26c ; 20d, 22d, 24d, 26d), caractérisé en ce que l'unité de commande (64a ; 64b ; 64c ; 64d) est prévue, au moins dans un mode de fonctionnement avec exploitation intermittente d'au moins deux unités de chauffe à induction (20a, 22a, 24a, 26a, 28a ; 20b, 22b, 24b, 26b, 28b ; 20c, 22c, 24c, 26c ; 20d, 22d, 24d, 26d), afin d'écarter les instants de départ (102a, 106a, 110a, 114a) de deux séquences d'exploitation consécutives (100a, 104a, 108a, 112a) d'unité de chauffe à induction quelconques (20a, 22a, 24a, 26a, 28a ; 20b, 22b, 24b, 26b, 28b ; 20c, 22c, 24c, 26c ; 20d, 22d, 24d, 26d) d'au moins 50 ms.
  2. Dispositif de champ de cuisson à induction selon la revendication 1, caractérisé en ce qu'au moins deux des unités de chauffe à induction (20a, 22a, 24a, 26a, 28a ; 20b, 22b, 24b, 26b, 28b ; 20c, 22c, 24c, 26c ; 20d, 22d, 24d, 26d) constituent une zone de chauffe commune (39a, 39b).
  3. Dispositif de champ de cuisson à induction selon l'une des revendications précédentes, caractérisé en ce qu'au moins deux des unités de chauffe à induction (20a, 22a, 24a, 26a, 28a ; 20b, 22b, 24b, 26b, 28b ; 20c, 22c, 24c, 26c ; 20d, 22d, 24d, 26d) présentent un contact commun (94a ; 94b ; 94c, 95c ; 94d, 95d).
  4. Dispositif de champ de cuisson à induction selon la revendication 3, caractérisé par une unité de résonance (50a ; 50b ; 50c, 51 c ; 50d, 51 d) reliée directement à un contact commun (94a ; 94b ; 94c, 95c ; 94d, 95d) dans au moins un état de fonctionnement.
  5. Dispositif de champ de cuisson à induction selon l'une des revendications précédentes, caractérisé en ce que l'unité de commande (64a ; 64b ; 64c ; 64d) est prévue, au moins dans un mode de fonctionnement avec exploitation intermittente d'au moins deux unités de chauffe à induction (20a, 22a, 24a, 26a, 28a ; 20b, 22b, 24b, 26b, 28b ; 20c, 22c, 24c, 26c ; 20d, 22d, 24d, 26d), afin d'écarter les instants de départ (102a, 114a) d'au moins deux séquences d'exploitation consécutives (100a, 112a) d'une unité de chauffe à induction (20a, 22a, 24a, 26a, 28a ; 20b, 22b, 24b, 26b, 28b ; 20c, 22c, 24c, 26c ; 20d, 22d, 24d, 26d) d'un maximum de 7 s.
  6. Dispositif de champ de cuisson à induction selon l'une des revendications précédentes, caractérisé par au moins deux éléments de commutation (40b, 42b, 44b, 46b, 48b) disposés entre l'unité de fréquence de chauffe (60b ; 60c ; 60d, 61d) et au moins une des unités de chauffe à induction (20b, 22b, 24b, 26b, 28b ; 20c, 22c, 24c, 26c ; 20d, 22d, 24d, 26d).
  7. Champ de cuisson à induction avec un dispositif de champ de cuisson à induction (12a ; 12b ; 12c ; 12d) selon l'une des revendications précédentes.
  8. Procédé d'exploitation d'un dispositif de champ de cuisson à induction (12a ; 12b ; 12c ; 12d) selon l'une des revendications 1 à 6, dans lequel l'unité de commande (64a ; 64b ; 64c ; 64d) exploite par intermittence au moins deux des unités de chauffe à induction (20a, 22a, 24a, 26a, 28a ; 20b, 22b, 24b, 26b, 28b ; 20c, 22c, 24c, 26c ; 20d, 22d, 24d, 26d) dans au moins un mode d'exploitation, caractérisé en ce que l'unité de commande (64a ; 64b ; 64c ; 64d) écarte d'au moins 50 ms les instants de départ (102a, 106a, 110a, 114a) de deux séquences d'exploitation consécutives (100a, 104a, 108a, 112a) d'unités de chauffe à induction quelconques (20a, 22a, 24a, 26a, 28a ; 20b, 22b, 24b, 26b, 28b ; 20c, 22c, 24c, 26c ; 20d, 22d, 24d, 26d) au moins dans un mode d'exploitation avec exploitation intermittente d'au moins deux unités de chauffe à induction (20a, 22a, 24a, 26a, 28a ; 20b, 22b, 24b, 26b, 28b ; 20c, 22c, 24c, 26c ; 20d, 22d, 24d, 26d).
EP12158709.1A 2011-03-29 2012-03-09 Dispositif de chauffage à induction Active EP2506667B2 (fr)

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EP2744300B1 (fr) * 2012-12-11 2015-11-18 BSH Hausgeräte GmbH Dispositif domestique de chauffage par induction

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0724379A1 (fr) 1995-01-25 1996-07-31 MENEGHETTI Ampelio, STRAGLIOTTO Maria, MENEGHETTI Cesira, MENEGHETTI Tiziano dba MENEGHETTI AMPELIO & C. S.n.c. Dispositif de commande, notamment pour une plaque de cuisson avec plusieurs surfaces de chauffage par induction
EP1951003A1 (fr) 2007-01-23 2008-07-30 Whirlpool Corporation Procédé de commande d'induction d'une plaque de cuisson et d'induction d'une plaque de cuisson adaptée à un tel procédé

Family Cites Families (3)

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Publication number Priority date Publication date Assignee Title
DE102006058874A1 (de) * 2006-12-06 2008-06-19 E.G.O. Elektro-Gerätebau GmbH Verfahren zum Steuern von Induktionsheizeinrichtungen bei einem Elektokochgerät
ES2330496B1 (es) * 2007-10-31 2010-09-08 Bsh Electrodomesticos España, S.A. Dispositivo de coccion.
ES2353890B1 (es) * 2008-12-19 2012-01-26 Bsh Electrodomesticos España, S.A. Campo de cocción con al menos tres zonas de calentamiento.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0724379A1 (fr) 1995-01-25 1996-07-31 MENEGHETTI Ampelio, STRAGLIOTTO Maria, MENEGHETTI Cesira, MENEGHETTI Tiziano dba MENEGHETTI AMPELIO & C. S.n.c. Dispositif de commande, notamment pour une plaque de cuisson avec plusieurs surfaces de chauffage par induction
EP1951003A1 (fr) 2007-01-23 2008-07-30 Whirlpool Corporation Procédé de commande d'induction d'une plaque de cuisson et d'induction d'une plaque de cuisson adaptée à un tel procédé

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Title
"Electromagnetic compatibility (EMC) - Part 3-3", IEC INTERNATIONAL STANDARD 61000-3-3 (EDITION 1.1), March 2002 (2002-03-01), XP055401968

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ES2606530T3 (es) 2017-03-24
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EP2506667A2 (fr) 2012-10-03

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