EP1854337A1 - Heating device for an inductive cooking device - Google Patents
Heating device for an inductive cooking deviceInfo
- Publication number
- EP1854337A1 EP1854337A1 EP05825303A EP05825303A EP1854337A1 EP 1854337 A1 EP1854337 A1 EP 1854337A1 EP 05825303 A EP05825303 A EP 05825303A EP 05825303 A EP05825303 A EP 05825303A EP 1854337 A1 EP1854337 A1 EP 1854337A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heating
- circuit
- inductors
- switching means
- inductor
- 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.)
- Granted
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
-
- 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
- H05B6/04—Sources of current
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
- H05B6/12—Cooking devices
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/36—Coil arrangements
- H05B6/44—Coil arrangements having more than one coil or coil segment
Definitions
- the invention relates to a heating device for a Indutationsgarêt according to the preamble of claim 1.
- the invention relates to a heating device for a Indutationsgarêt with a first resonant circuit comprising at least a first and a second inductor for transmitting heat energy to a heating element to be heated and a first circuit for exciting the first resonant circuit and supplying the heating energy to the inductors.
- the heating device comprises a switching means by which the heating energy can optionally be fed in parallel only to one of the inductors or simultaneously to both inductors.
- a switching means by which the heating energy can optionally be fed in parallel only to one of the inductors or simultaneously to both inductors.
- the switching means By the switching means one of the two or both inductors, preferably directly connected to the circuit for exciting the first resonant circuit.
- the induction cooking appliance can be kept particularly simple if the supply of heating energy is effected by connecting voltage drawn from a power supply network. In this case, an additional resonant circuit can be dispensed with.
- the circuit for exciting the first resonant circuit preferably comprises a half-bridge circuit.
- the second inductor is operated exclusively with the first inductor together.
- the two inductors are expediently used for heating a single heating element, for example a single pot. They are preferably arranged in the immediate vicinity of each other. Large or elongated cooking appliances can be heated particularly effectively when the inductors are arranged in a contiguous heating area for heating a single heating element.
- both inductors can be connected by the switching means individually to the first circuit. Both inductors can be treated equally by an operator, and a small pot can e.g. optionally be placed on one or the other inductor for heating.
- the heating device comprises a rectifier to which both the first resonant circuit and a second resonant circuit with a second circuit for exciting the second resonant circuit and a further inductor are turned on.
- Unwanted noise when heating a cooking vessel can be avoided by a control unit which is prepared to control the circuits so that the first circuit always resonates the first resonant circuit at the same frequency as the second circuit stimulates the second resonant circuit.
- the Gleichscnies the resonant circuits can be performed independently of an operation of Indutechnischsgarêts.
- the heating device be another circuit for exciting a further resonant circuit with a further inductor and another
- Switching means comprises, wherein the further circuit is selectively connectable by the further switching means with the first or the further resonant circuit.
- the first resonant circuit can be transmitted by both circuits for excitation a large power without this electrical components of one of the circuits would have to be particularly stressed.
- the further circuit can support the first circuit by its performance.
- the heating device comprises a means for measuring a property of the resonant circuit successively with the switching means open and closed and for detecting whether the heating element is arranged on only one or both inductors. It can be automatically recognized, for example by means of a control unit, whether the heating element should be sufficiently heated with an inductor or more uniformly with both inductors, and the switching means can be switched automatically according to the more effective variant. A decision as to whether either or both of the inductors are to be used to heat the heating element can be saved to an operator.
- the heating device expediently comprises a control unit which is provided for actuating the switching means at a moment at which no voltage is applied to the circuit. device for excitation of the resonant circuit is applied.
- the control unit is prepared to interrupt the voltage before switching the switching means or to set it to a predetermined value.
- Fig. 1 is a schematic sectional view through a pot and a
- FIG. 2 shows a circuit diagram of a resonant circuit with two inductors and a switching means between the two inductors
- FIG. 3 shows different heating areas for an induction hob with a plurality of heating subfields, each assigned to an inductor
- FIG. 3 shows different heating areas for an induction hob with a plurality of heating subfields, each assigned to an inductor
- FIG. 5 shows a block diagram of a further heating unit with three inductors and two circuits for exciting each resonant circuit
- FIG. 6 shows a circuit diagram of a further heating device with two inductors and a switching means, with the optional one of the two inductors or both inductors can be excited simultaneously
- FIG. 8 shows a circuit diagram of a further heating device with three inductors and a second circuit which can be used to amplify a first circuit for exciting a resonant circuit.
- Figure 1 shows a section through a pot 2 with a bottom of the pot, which is provided as a heating element 4 for a liquid in the pot 2 or food.
- the pot 2 stands on a support plate 6 of an induction hob of a Indutationsgarêts, under which a heater 8 for inductive heating of the heating element 4 is arranged.
- the heating device 8 comprises a plurality of winding blocks 10, each comprising an inner and an outer coil.
- the inner coils are in this case combined to form a first inductor 12 and the outer coils are combined to form a second inductor 14.
- the magnetic field generated by the two inductors 12, 14 is directed by a straightening structure 16 to the heating element 4 and generates when flowing through the heating element 4 eddy currents that heat the heating element 4.
- FIG. 2 shows a circuit diagram of the heating device 8, which is provided for connection to an AC voltage of a power supply network 20.
- the heating device 8 comprises the two inductors 12, 14, a capacitive element 22 with two capacitors, a half-bridge circuit 24 having two power transistors 28 for applying a switching voltage to one or both of the inductors 12, 14 and a rectifier 26 comprising two diodes.
- a switching means 30 By a switching means 30, the second inductor 14 in addition to the first inductor 12 are connected to the circuit 24.
- the circuit 24, the capacitive element 22 and one or both of the inductors 12, 14 form a resonant circuit 32 which can be excited by the circuit 24 to oscillate, the circuit 24 heating energy to heat the heating element of one or both of the inductors 12, 14 4 feeds.
- FIGS. 1 and 2 The elements of the heating device 8 shown in FIGS. 1 and 2 are used in the following to explain a few examples, wherein identical or similar elements are each provided with the same reference numerals.
- the first inductor 12 is arranged below a first heating portion 34 of the support plate 6, which is shown in FIG.
- the second inductor 14 is disposed below a second heating portion 36.
- the two heating sections 34, 36 are arranged directly next to each other and together form a heating area 38 for heating an oval or elongate heating element 4 of a cooking vessel, for example a casserole or a fish pot.
- the switching means 30 shown in FIG. 2 only the first inductor 12 is connected to the circuit 24 for exciting the resonant circuit 32.
- the second inductor 14, however, does not resonate with the excitation of the resonant circuit 32 by the circuit 24. Heat in the heating element 4 is thus generated only by the magnetic field caused by the first inductor 12.
- This position of the switching means 30 is suitable for heating a small pot 2 with a small heating element 4, which stands on the first Schuteil Scheme 34.
- the switching means 30 can be closed and the second inductor 14 are connected to the circuit 24. Now swing both inductors 12, 14, whereby the full heating area 38 is charged with a provided for heating the heating element 4 magnetic field.
- the second inductor 14 may be dimensioned smaller in this example in its performance than the first inductor, since the second Schuteil Scheme 36 of the surface is slightly smaller than the first Schuteil Scheme 34.
- the heating powers of the inductors 12, 14 always in a fixed, predetermined relationship to each other.
- a heating area 40 with two heating part areas 42, 44 arranged concentrically with one another is particularly suitable, as shown in FIG.
- a smaller first Schuteil Complex 42 is surrounded by a larger second Schuteil Complex 44 annular.
- the switching means 30 is opened, so that the first inductor 12 is connected to the circuit 24.
- the switching means 30 is closed, and the second inductor 14, which is made more powerful in this example than the first inductor 12, is also connected to the circuit 24 for exciting the resonant circuit 32.
- FIG. 4 shows a block diagram of the heating device 8 from FIG. 2.
- the heating device 8 comprises the rectifier 26, the circuit 24, the two inductors 12, 14 and the switching means 30.
- FIG. 5 shows an alternative heating device 46, to the rectifier 48 of which two circuits 50, 52 for the excitation of a respective resonant circuit 54, 56 are connected.
- the first resonant circuit 54 here comprises two inductors 58, 60, of which the inductor 60 can be connected to the first circuit 50 via a switching means 62.
- the second resonant circuit 56 includes only a single inductor 64.
- Both circuits 50, 52 are individually controllable by the control unit 18, so that together with the switching means 62 one, two or three inductors 58, 60, 64 can be actuated.
- Such a heater 46 is particularly suitable for a like in FIG 3 heating sections 68, 70, 72 for a small, medium and a very large pot 2.
- the two Circuits 50, 52 are always controlled by the control unit 18 so that all the excited inductors 58, 60, 64 are excited to oscillate at the same frequency in order to avoid interference oscillations in the pot 2.
- FIG. 6 shows a heating device 74, which is particularly suitable for heating regions 76, 78, such as those shown in FIG.
- Two inductors 80, 82 are individually or jointly connectable via a respective switching means 84, 86 with the circuit 24 for exciting the resonant circuit 32.
- the inductors 80, 82 have, for example, the same power ranges and are therefore particularly suitable for arrangement under the same Thompsonteil Schemeen 88, 90 or 92, 94 of the heating areas 76 and 78, each for heating a very small or small pot 2 or common heating a medium-sized or large elongated pot 2 are provided.
- the inductors 80, 82 are individually connectable to the circuit 24.
- both switching means 84, 86 are closed and both inductors 80, 82 are connected to the circuit 24 and thereby excited to transmit energy to the heating element 4.
- the graph shown in Figure 7 shows the power P of the inductors 12, 14 and 80, 82 plotted against the switching frequency f s of the circuit 24.
- the power P is with respect to the maximum power P max of the only turned-on inductor 12 or 80 or 82 is plotted, and the switching frequency f s is normalized with respect to the resonant frequency f r of the oscillating circuit 32 with only one inductor 12 or 80 or 82 connected.
- the curve 96 indicates the power of an inductor 12 or 80 or 82 connected individually to the circuit 24.
- the control unit 18 For controlling the power P of the inductor 12 or 80 or 82, the control unit 18 sets a switching frequency f s corresponding to the desired power P between, for example, 1, 0 f r and 1, 8 f r .
- the power is variable in this example between P max and 0.2 P max . If two circuits 50, 52 are available, as in the heater 46 of Figure 5, the total power of the two inductors 58, 64 together - with the inductor 60 switched off - reach the value 2 P max , as represented by the curve 98.
- FIG. 8 shows a further embodiment with which this relative power loss can be counteracted.
- a heating device 104 Shown is a heating device 104, whose components 8 to the heating device are always identified by the same reference numerals. Furthermore, with regard to features and functions that remain the same, reference may be made to the description of the exemplary embodiment in FIGS. 2 and 4.
- the heating device 104 has a further circuit 106 for exciting a further oscillating circuit 108 with a further inductor 110.
- the heating device 104 comprises two further switching means 1 12, 1 14, which - as well as the switching means 30 - are actuated by the control unit 18.
- the inductor 1 10 with the circuit 106 and the inductors 12, 14 with the circuit 24 or the inductor 1 10 with the circuits 24 and 106 or the inductors 12, 14 with the Circuits 24 and 106 are connected.
- both circuits 24 and 106 can excite the inductors 12, 14 and thus - without a large load on the electrical components of the circuits 24, 106 - both inductors 12, 14 individually with the one shown in FIG Curve 96 or together with the power P to curve 98 are operated.
- This is particularly suitable for use with the heating region 40, each with large heating portions 42, 44 for heating a very large pot 2. It is also possible to arrange all three inductors 12, 14, 110 for use with the heating region 66 immediately adjacent to each other the heating element rich 68, 70 with particularly high power P or all three Bankteil Schemee 68, 70, 72 with distributed power P to operate.
- the control unit 18 is provided for determining a variable associated with the inductance of the oscillating circuit 32. By measuring this size both with the switching means 30 closed and with the switching means 30 open, the arrangement of a large or a small pot 2 in the heating area 40 can be concluded, and the switching means 30 for efficient heating of the pot 2 or its heating element 4 can be switched accordingly.
- Heating section 94 Heating section
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Induction Heating Cooking Devices (AREA)
- Cookers (AREA)
- General Induction Heating (AREA)
- Control Of High-Frequency Heating Circuits (AREA)
- Electric Stoves And Ranges (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL05825303T PL1854337T3 (en) | 2005-03-01 | 2005-12-27 | Heating device for an inductive cooking device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES200500543A ES2265758B1 (en) | 2005-03-01 | 2005-03-01 | HEATING DEVICE FOR AN INDUCTION KITCHEN. |
PCT/EP2005/057179 WO2006092179A1 (en) | 2005-03-01 | 2005-12-27 | Heating device for an inductive cooking device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1854337A1 true EP1854337A1 (en) | 2007-11-14 |
EP1854337B1 EP1854337B1 (en) | 2012-03-21 |
Family
ID=35886329
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05825303A Revoked EP1854337B1 (en) | 2005-03-01 | 2005-12-27 | Heating device for an inductive cooking device |
Country Status (7)
Country | Link |
---|---|
US (1) | US8030601B2 (en) |
EP (1) | EP1854337B1 (en) |
AT (1) | ATE550909T1 (en) |
DK (1) | DK1854337T3 (en) |
ES (2) | ES2265758B1 (en) |
PL (1) | PL1854337T3 (en) |
WO (1) | WO2006092179A1 (en) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202006016551U1 (en) * | 2006-10-23 | 2008-03-06 | E.G.O. Elektro-Gerätebau GmbH | induction heating |
ES2310960B1 (en) * | 2006-11-08 | 2009-11-05 | Bsh Electrodomesticos España S.A. | HEATING DEVICE CIRCUIT. |
ES2335256B1 (en) | 2008-01-14 | 2011-01-17 | Bsh Electrodomesticos España, S.A. | INDUCTION COOKING FIELD WITH A PLURALITY OF INDUCTION HEATING BODIES. |
KR101353313B1 (en) * | 2008-02-25 | 2014-01-21 | 삼성전자주식회사 | Electric range and induction coil unit |
DE102009018134A1 (en) * | 2009-04-15 | 2010-09-16 | E.G.O. Elektro-Gerätebau GmbH | Induction heating device for induction cooker, comprises three induction coils that are arranged, such that central induction coil is arranged between two outer induction coils |
ES2366514B1 (en) * | 2009-05-15 | 2012-10-09 | Bsh Electrodomesticos España S.A. | DEVICE FOR PLACEMENT ON AN INDUCTION COOKING FIELD. |
ES2362607B1 (en) * | 2009-08-27 | 2012-06-05 | Bsh Electrodomésticos España, S.A. | MULTIPLEXATION OF INDUCTION HEATING LOADS. |
EP2306784A1 (en) * | 2009-10-05 | 2011-04-06 | Whirlpool Corporation | Method for supplying power to induction cooking zones of an induction cooking hob having a plurality of power converters, and induction cooking hob using such method |
ES2378607B1 (en) * | 2009-11-05 | 2013-03-14 | BSH Electrodomésticos España S.A. | COOKING FIELD WITH AT LEAST TWO HEATING INDUCTORS. |
EP2512205B1 (en) * | 2009-12-11 | 2015-02-11 | Panasonic Corporation | Induction heating apparatus and induction heating cooker provided with same |
ES2388028B1 (en) | 2010-03-03 | 2013-08-23 | Bsh Electrodomésticos España, S.A. | COOKING HOB WITH AT LEAST ONE COOKING AREA AND PROCEDURE TO OPERATE A COOKING HOB. |
ES2388269B1 (en) | 2010-03-03 | 2013-08-23 | BSH Electrodomésticos España S.A. | COOKING HOB WITH AT LEAST ONE COOKING AREA, AND PROCEDURE TO OPERATE A COOKING HOB. |
ES2388303B1 (en) | 2010-03-03 | 2013-08-23 | BSH Electrodomésticos España S.A. | COOKING HOB WITH AT LEAST ONE COOKING AREA, AND PROCEDURE TO OPERATE A COOKING HOB. |
EP2506671B1 (en) | 2011-03-29 | 2017-09-13 | BSH Hausgeräte GmbH | Switch device |
FR2984038B1 (en) * | 2011-12-13 | 2018-09-21 | Fagorbrandt | INVERTER SUPPLY DEVICE, IN PARTICULAR FOR INDUCTION COOKING APPARATUS |
JP6723432B2 (en) * | 2017-03-24 | 2020-07-15 | 三菱電機株式会社 | Induction cooker |
US11438974B2 (en) * | 2017-03-30 | 2022-09-06 | BSH Hausgeräte GmbH | Induction cooktop device |
KR102071957B1 (en) * | 2018-04-19 | 2020-01-31 | 엘지전자 주식회사 | Induction heating device having improved control algorithm and circuit structure |
KR102082507B1 (en) * | 2018-05-16 | 2020-02-27 | 엘지전자 주식회사 | Induction heating device having improved control algorithm and circuit structure |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL296433A (en) | 1962-08-09 | |||
JPS59149683A (en) * | 1983-01-28 | 1984-08-27 | 株式会社東芝 | Induction heating cooking device |
JPH02114488A (en) * | 1988-10-25 | 1990-04-26 | Matsushita Electric Ind Co Ltd | Induction heating cooker |
EP0376760A1 (en) | 1988-12-27 | 1990-07-04 | Bonnet S.A. | Electric induction-cooking appliance |
JP2722738B2 (en) * | 1989-12-20 | 1998-03-09 | 松下電器産業株式会社 | Induction heating device |
JP2943017B2 (en) * | 1991-01-16 | 1999-08-30 | 松下電器産業株式会社 | Pot detection device for induction heating cooker |
FR2672763B1 (en) * | 1991-02-08 | 1993-05-07 | Bonnet Sa | INDUCING DEVICE FOR INDUCTION HEATING OF KITCHEN CONTAINERS AND METHOD FOR CONTROLLING SUCH A DEVICE. |
FR2773014B1 (en) | 1997-12-23 | 2000-03-03 | Europ Equip Menager | DEVICE FOR SUPPLYING MULTIPLE RESONANT CIRCUITS BY AN INVERTER POWER GENERATOR |
FR2806868B1 (en) * | 2000-03-21 | 2002-06-28 | Brandt Cooking | DEVICE FOR HEATING BY INDUCTION OF CULINARY CONTAINER |
DE10231122A1 (en) * | 2002-07-05 | 2004-01-22 | E.G.O. Elektro-Gerätebau GmbH | Method of measuring the temperature of a metal cooking vessel |
JP2004296279A (en) * | 2003-03-27 | 2004-10-21 | Hitachi Hometec Ltd | Induction heating cooker |
DE10314690A1 (en) | 2003-03-27 | 2004-10-07 | E.G.O. Elektro-Gerätebau GmbH | Heating device for flat heating with induction heating elements |
US7022952B2 (en) * | 2003-08-26 | 2006-04-04 | General Electric Company | Dual coil induction heating system |
-
2005
- 2005-03-01 ES ES200500543A patent/ES2265758B1/en not_active Expired - Fee Related
- 2005-12-27 US US11/885,324 patent/US8030601B2/en not_active Expired - Fee Related
- 2005-12-27 AT AT05825303T patent/ATE550909T1/en active
- 2005-12-27 EP EP05825303A patent/EP1854337B1/en not_active Revoked
- 2005-12-27 PL PL05825303T patent/PL1854337T3/en unknown
- 2005-12-27 DK DK05825303.0T patent/DK1854337T3/en active
- 2005-12-27 ES ES05825303T patent/ES2383963T3/en active Active
- 2005-12-27 WO PCT/EP2005/057179 patent/WO2006092179A1/en not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO2006092179A1 * |
Also Published As
Publication number | Publication date |
---|---|
ES2265758A1 (en) | 2007-02-16 |
ES2265758B1 (en) | 2007-11-16 |
US20080164249A1 (en) | 2008-07-10 |
DK1854337T3 (en) | 2012-07-09 |
US8030601B2 (en) | 2011-10-04 |
PL1854337T3 (en) | 2012-08-31 |
WO2006092179A1 (en) | 2006-09-08 |
ATE550909T1 (en) | 2012-04-15 |
EP1854337B1 (en) | 2012-03-21 |
ES2383963T3 (en) | 2012-06-27 |
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