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
  • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
  • H05B6/12—Cooking devices
  • H05B6/1209—Cooking devices induction cooking plates or the like and devices to be used in combination with them
  • H05B6/1245—Cooking devices induction cooking plates or the like and devices to be used in combination with them with special coil arrangements
  • H05B6/1272—Cooking devices induction cooking plates or the like and devices to be used in combination with them with special coil arrangements with more than one coil or coil segment per heating zone

Definitions

• the invention is based on an induction heating device according to the preamble of claim 1.
• Induction heaters which comprise an induction heating unit formed by one or more concentrically arranged induction coils.
• the object of the invention is in particular to provide a generic device with improved properties in terms of miniaturization.
• the object is achieved by the features of claim 1, while advantageous embodiments and refinements of the invention
• the invention is based on an induction heating device, in particular a
• An induction hob apparatus comprising at least one induction heating unit having at least two induction heating conduits intended to be supplied by different heating frequency units.
• induction heating unit is to be understood in particular as meaning a heating unit which is intended, by induction effects, in particular induction of electrical current and / or remagnetization effects, in a, preferably ferromagnetic, in particular metallic, heating means, in particular in one
• the induction heating unit is provided to transmit in at least one operating mode in which the induction heating unit is connected to a supply electronics, a power of at least 100 W, in particular at least 500 W, advantageously at least 1000 W, preferably at least 2000 W, in particular electrical energy into electromagnetic field energy, which is finally converted into heat in a suitable heating medium.
• a power of at least 100 W, in particular at least 500 W, advantageously at least 1000 W, preferably at least 2000 W in particular electrical energy into electromagnetic field energy, which is finally converted into heat in a suitable heating medium.
• an electrical conduit is understood, which is intended to carry an electric current, which is intended to cause induction effects in a suitable heating means.
• the induction heating is as
• Inductance in particular as a coil, advantageously as a flat coil, preferably at least substantially in the form of a circular disc, alternatively in the form of an oval or a rectangle formed.
• the induction heating in particular with a coupled heating means, an inductance of at least 0, 1 ⁇ , in particular at least 0.3 ⁇ , advantageously at least 1 ⁇ , on.
• the induction heating in particular with a coupled heating means, an inductance of at least 0, 1 ⁇ , in particular at least 0.3 ⁇ , advantageously at least 1 ⁇ , on.
• the induction heating in particular with a coupled heating means, an inductance of at least 0, 1 ⁇ , in particular at least 0.3 ⁇ , advantageously at least 1 ⁇ , on.
• Indutationsloom economically, in particular without a coupled heating means, an inductance of a maximum of 100 mT, in particular a maximum of 10 mT, advantageously a maximum of 1 mT, on.
• the induction heating is intended to at least in one
• operating state of high-frequency alternating current in particular an alternating current having a frequency of at least 1 kHz, in particular at least 3 kHz, advantageously at least 10 kHz, preferably at least 20 kHz, in particular at most 100 kHz, in particular with a current of at least 0.5 A, in particular at least 1 A, advantageously at least 3 A, preferably at least 7 A, to be flowed through.
• a "heating frequency unit” is to be understood as meaning, in particular, an electrical unit which has an oscillating electrical signal, preferably with a frequency of at least 1 kHz, in particular of at least 10 kHz advantageously of at least 20 kHz, and in particular of at most 100 kHz for a
• 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 in particular 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 damping capacitor connected in parallel to the bidirectional unipolar switches, which is in particular formed by at least one capacitor. This allows a high-frequency power supply of the
• Induction heating unit can be provided.
• the heating frequency units are intended to generate currents which are a have at least substantially the same phase and / or an at least substantially the same frequency.
• each of the values is not more than 100%, in particular not more than 20%, advantageously not more than 5%, particularly advantageously not more than 1%, preferably not more than 0.3% different from others
• Indutationscream originallyen formed as spirals run into each other.
• the induction heating cables are arranged one above the other.
• a space savings can be achieved with respect to embodiments with concentric, separate induction heating.
• a high power input can also be achieved for small heating means, in particular garnishes.
• the different heating frequency units are intended to be connected to different phases of a multi-phase power connection.
• a "connection" to a phase is to be understood as meaning that the heating frequency unit is connected in such a way that it can draw power from the phase, and in particular a high total power can be achieved.
• the at least two induction heating cables are each formed by strands of a single stranded conductor.
• the induction heating cables differ from two parallel-guided stranded conductors.
• a “stranded conductor” is to be understood in particular as meaning an electrical conductor which is formed by a multiplicity, in particular at least 4, advantageously at least 8, particularly advantageously at least 16, preferably at least 32, individual wires, so-called strands
• an insulation of the strands is intended to safely shield a voltage of at least 500 V, in particular at least 1000 V, advantageously at least 2000 V, preferably at least 4000 V.
• the strands of the stranded conductor are preferably encased in a common electrical insulation.
• the strands of the stranded conductor are twisted together, in particular intertwined.
• strands of an induction heating line are electrically connected to one another at their ends and thus connected in parallel to one another.
• the induction heating cables differ from two parallel-guided, in particular twisted, stranded conductors.
• integers are understood that differ by a maximum of 10, in particular a maximum of 5, advantageously a maximum of 3, preferably a maximum of 1.
• the proximity effect and / or the skin effect can be counteracted.
• it may be an efficient radio frequency application
• Induction heating can be achieved.
• a low-cost configuration can take place, since only one electrical line has to be formed into an inductance.
• a redesign of additional components, in particular a coil carrier, or a redesign of manufacturing processes, in particular of the winding process can be dispensed with in comparison to conventional induction heating devices.
• an insulation of the strands is colored.
• insulation of the strands is formed by an insulating varnish.
• a thickness of insulation is the Litzen maximally 100 ⁇ , in particular maximally 50 ⁇ , advantageously maximally 30 ⁇ , preferably maximally 20 ⁇ .
• a simple assembly and / or production can be achieved.
• a faulty connection of the strands can be prevented.
• the induction heating device has a control unit which is provided to associate the at least two induction heating lines of a single or at least two different heating frequency units.
• a "control unit” is to be understood in particular as meaning a unit which has at least one control unit.
• Control unit is to be understood in particular to mean an electronic unit which is preferably at least partially integrated in a control and / or regulating unit of an induction heating apparatus and which preferably is provided to control at least the heating frequency units and / or to regulate.
• the control unit preferably comprises a computing unit and, in particular in addition to the computing unit, a memory unit with a control and / or regulating program stored therein, which is intended to be executed by the computing unit.
• the control unit preferably has at least one switching arrangement with at least one switching element, in particular an electromechanical switching element, advantageously a relay, which is provided to assign at least one of the induction heating lines to different heating-frequency units.
• the at least one switching element is designed as at least one-pole, preferably two-pole, changeover switch.
• the switching element is provided to produce or disconnect only one connection between one of the induction heating pipes and a heating frequency unit.
• the control unit is provided to heat the Indutechnischscreamtechnisch in response to a requested for the induction heating unit power, either a heating frequency unit, or more of a same phase
• control unit is intended, in the case of very high requested powers, to operate the induction heating pipes of different phases. It can
• the induction heating unit has a diameter which is smaller than 28 cm, in particular smaller than 25 cm, advantageously smaller than 23 cm, preferably smaller than 22 cm. Under a "diameter" of
• Indutationswarriari should in particular a diameter of the
• a diameter of the induction heating line corresponds to a diameter of the largest turn of the induction heating conductors.
• Induction coils a particularly great advantage can be achieved.
• the induction heating cables are provided to jointly implement a power of at least 3700 W, in particular at least 4000 W, advantageously at least 4300 W.
• a maximum power that can be shared by the induction heating lines is more than a maximum of a single phase of a multi-phase power
• Domestic electricity connection may be purchased.
• a rapid heating of food and / or heating means can be made possible.
• Fig. 1 shows an inventive hob with an inventive
• Fig. 2 shows an induction heater according to the invention with a
• FIG. 3 is a circuit diagram of a circuit according to the invention.
• FIG. 1 shows a domestic appliance 10 designed as an induction hob.
• the domestic appliance 10 has an induction heating device 12 designed as an induction hob appliance.
• the induction heater 12 has five induction heating units 20, 22, 24, 26, 28.
• the induction heating units 26, 28 are concentric.
• the induction heating units 26, 28 are concentric.
• Induction heating unit 20 has a diameter 14 of 21 cm.
• Induction heating units 22, 24 have a diameter of 24 cm.
• the induction heating unit 20 has two induction heating pipes 32, 34 which are provided by a first heating frequency unit 42 and a second heating frequency unit 42
• Heating frequency unit 44 to be supplied ( Figures 2 and 3).
• the induction heating pipes 32, 34 are arranged together.
• the induction heating pipes 32, 34 are formed by a stranded wire 30 having 38 strands.
• the induction heating pipes 32, 34 are each formed by nineteen strands of the stranded wire 30.
• the strands intended to form different induction heating lines 32, 34 are colored differently.
• the strands have a diameter of 0.2 mm.
• Induction heating line 32 are colored blue, while the strands of the second
• Induction heating 34 are colored red.
• the strands of the stranded conductor 30 are
• the strands of the respective Indudictionscream admiren 32, 34 are electrically connected to each other at their corresponding ends and form contacts 52, 53, 54, 55. Contrary to the schematic representation in which the Indu Vietnamesescream admiren 32, 34 are guided in parallel, the strands of the different Indu Vietnamesescream admiren are 32nd , 34 twisted together and intertwined.
• the contacts 52, 54, and 53, 55 are electrically isolated from each other.
• the contacts 52, 53 and 54, 55 are conductively connected to each other via the respective induction heating line 32, 34.
• the Indudictionscream effet 32, 34 are provided, if this is required by an operator via an operating unit of the domestic appliance 10 to implement a power of 4400 W.
• Induction heater 12 includes electronics assemblies 62, 64.
• Electronic assemblies 62, 64 have the heating frequency units 42, 44. Furthermore, the electronic assemblies 62, 64 have rectifier components. Furthermore, the electronic assemblies 62, 64 have resonant assemblies formed by capacitors. on, which are intended to form with the Indutechnischscreamtechnischen 32, 34 resonant circuits.
• the different heating frequency units 42, 44 are via the respective electronic assemblies 62, 64 to different phases 43, 45 of a
• a control unit 70 which has a control unit 72 and a switching arrangement 74 on.
• the control unit 70 is provided to individually assign the two induction heating lines 32, 34 of the first heating frequency unit 42 or to assign them to different heating frequency units 42, 44.
• the switching arrangement 74 has a switching element 75 configured as a two-pole changeover switch.
• the switching element 75 is designed as a relay.
• the electronics assembly 64 is intended to be connected to the induction heating unit 22 during operation thereof. If the induction heating unit 22 is not in operation and the induction heating unit 20 is required to have a heating power greater than a heating power that can be supplied by a single phase 43, 45, this is
• Control unit 70 is provided to switch the switching arrangement 74 such that the induction heating 34 with the electronic assembly 64 and thus with the
• Heating frequency unit 44 is connected.
• the control unit 72 is provided to operate the heating frequency units 42, 44 with the same parameters, ie the same frequency, the same phase position, the same dead times, etc. If no heating power is requested for the induction heating unit 22, the control unit 72 is provided for
• Indutationscream Vogel 34 of the heating frequency unit 44 assign to reduce a load on the first heating frequency unit 42. If powers are required for the induction heating unit 20 under the maximum power available from one phase 43, 45 and the induction heating unit 22 is operating, the control unit 70 is provided to associate the induction heating line 34 with the first heating frequency unit 42 to reduce load on the induction heating line 32 ,
• the heating frequency units 42, 44 each have an inverter.
• Heating frequency units 42, 44 connected.
• the electronic assembly 64 is provided solely as a reserve for the induction heating unit 20 and for the induction heating unit 22 at least one separate electronic assembly is provided. Furthermore, it is conceivable that the induction heating unit 22 is also formed by two induction heating conductors, the are arranged together, and the induction heater 12 is another
• An electronic assembly with a heating frequency unit which is provided to supply at least one of the induction heating cables, and that the control unit 70 is provided to assign the electronic assembly 64, if necessary, the induction heating unit 22 or the induction heating unit 20. This can be scaled as required in the usual household appliance.
• a stranded conductor 30 the strands of which have two different colors, is inserted into a spiral groove in a carrier (not shown) and glued to the carrier. The ends of the stranded wire 30 are split open and the strands
• Matching strands are with a
• Contact terminal mechanically and electrically connected to contacts 52, 53, 54, 55 with each other.
• a heating frequency unit has more than two, in particular three, different induction heating lines, which are arranged one next to the other.

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

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Applications Claiming Priority (2)

Publications (2)

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Cited By (1)

Family Cites Families (7)

• 2012
  • 2012-11-20 WO PCT/IB2012/056557 patent/WO2013080088A2/de not_active Ceased
  • 2012-11-20 EP EP12815785.6A patent/EP2786637B1/de active Active
  • 2012-11-20 ES ES12815785T patent/ES2927333T3/es active Active

Non-Patent Citations (1)

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