EP1844630B1 - Induction heating device and ceramic hob cavity comprising said type of induction heating device - Google Patents
Induction heating device and ceramic hob cavity comprising said type of induction heating device Download PDFInfo
- Publication number
- EP1844630B1 EP1844630B1 EP06706390A EP06706390A EP1844630B1 EP 1844630 B1 EP1844630 B1 EP 1844630B1 EP 06706390 A EP06706390 A EP 06706390A EP 06706390 A EP06706390 A EP 06706390A EP 1844630 B1 EP1844630 B1 EP 1844630B1
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- European Patent Office
- Prior art keywords
- support
- induction heating
- heating device
- induction
- supply part
- 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.)
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- 230000006698 induction Effects 0.000 title claims abstract description 149
- 238000010438 heat treatment Methods 0.000 title claims description 57
- 239000000919 ceramic Substances 0.000 title 1
- 125000006850 spacer group Chemical group 0.000 claims description 28
- 238000001816 cooling Methods 0.000 claims description 27
- 125000004122 cyclic group Chemical group 0.000 claims description 2
- 230000001419 dependent effect Effects 0.000 claims description 2
- 238000010248 power generation Methods 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 claims 1
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 229910000859 α-Fe Inorganic materials 0.000 description 4
- 239000002241 glass-ceramic Substances 0.000 description 3
- 238000010411 cooking Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
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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
-
- 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
- H05B6/1263—Cooking devices induction cooking plates or the like and devices to be used in combination with them with special coil arrangements using coil cooling arrangements
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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
-
- 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
- H05B2206/00—Aspects relating to heating by electric, magnetic, or electromagnetic fields covered by group H05B6/00
- H05B2206/02—Induction heating
- H05B2206/022—Special supports for the induction coils
Definitions
- the invention relates to an induction heater for a cooking area and a hob with such an induction heater.
- a hob with induction heaters is for example from the DE19817197 A1 known.
- individual induction coils possibly wound on their own carrier, arranged in a receptacle of an induction cooktop. They are connected to a central power supply which is provided either for all induction heaters or for at least two induction heaters.
- a hob control is according to the predetermined power level signals to the power supply for a corresponding power application of the respective induction heater.
- the DE 199 35 835 A1 known to heat two hobs inductively with induction heating on a hob cavity and the other hobs with radiant heaters.
- a common power supply is provided, which applies control commands according to one or both induction heaters with power.
- the two induction heating devices can be designed as a so-called two-module belonging together.
- the DE 202 04 249 U1 describes an induction heater for a hotplate.
- This induction heater has an induction coil in the form of a flat spiral, one mounted on one side Heatsink and a cover plate to cover power elements of an induction generator of the induction heater.
- this induction heater is constructed relatively open. Furthermore, cooling of a power electronics can only be done via the heat sink and the cover plate.
- the DE 101 63 839 A1 describes a further induction heating device in the form of an aforementioned two-module. Induction coils are provided on a frame, while common cooling bodies, a single common cooling fan and the electronics for all four induction coils are provided underneath. These individual functional parts form assemblies.
- the invention has for its object to provide an induction heater mentioned above and provided therewith hob hob with which problems of the prior art can be eliminated and above all, a desired structure of a hob cavity in various ways is possible.
- the induction coil is arranged or fastened to a carrier device, which can also be done by winding a coil wire onto the carrier device.
- a supply part arranged, which converts supplied voltage, in particular single-phase mains voltage, into a power drive for the induction coil.
- the supply part has power electronics and control electronics, for which purpose the induction heating device has electrical power connections and electrical control connections.
- a fan device is provided which at least cools the power unit or supplies cooling air.
- the induction heater is designed as a ready to install or ready to connect unit. This means that it is prefabricated so far that it only needs to be used in a hob cavity during assembly and electrically connected. Further steps are advantageously not required.
- the assembly of a hob with at least one such induction heating fast and easy to do.
- the induction heater is a self-sufficient functional unit that can be very easily connected as well as otherwise, for example radiant heater and no additional power electronics needed.
- the induction heater is a self-sufficient functional unit that can be very easily connected as well as otherwise, for example radiant heater and no additional power electronics needed.
- the induction heater is a self-sufficient functional unit that can be very easily connected as well as otherwise, for example radiant heater and no additional power electronics needed.
- the induction heater is a self-sufficient functional unit that can be very easily connected as well as otherwise, for example radiant heater and no additional power electronics needed.
- four-hob hob four heaters to use of which any number may be formed by induction heating according to the invention.
- the separate power supply or power electronics is eliminated.
- This also has the advantage, for example, that the space otherwise required for the central or common power supply becomes available. This in turn increases the scope for the arrangement of the heaters on the hob.
- the induction coil is flat and consists of a layer of coiled conductors, so it is single-layered.
- the support means is substantially flat, such as a disk-like. It supports the induction coil over the entire surface or on its entire surface, although it may have individual openings or openings.
- the supply part which can have a number of components, this advantageously carries on a printed circuit board or generally on a component carrier. This advantageously extends substantially parallel to the induction coil. All electrical components of the control electronics and / or power electronics are particularly advantageously mounted on a single component carrier, in particular on both sides.
- the fan device may advantageously be a conventional integrated and relatively small fan, which only has to be electrically connected.
- This fan can be attached on the one hand to the support means, wherein it is advantageously attached directly thereto by screws or locking connections or the like. But it can also be attached directly to the component carrier or connected to it. About spacers or the like. it can also rest against the carrier device.
- spacers are provided between the component carrier and the carrier device, which provide for the exact positioning of the component carrier relative to the carrier device and thus within the induction device.
- the component carrier may be mechanically fixedly connected to the carrier device, for example via the aforementioned spacers. Such a connection should be solvable, especially in the event of repair or replacement.
- a cover may be provided which covers or surrounds various components of the induction heating device, in particular the component carrier.
- the cover is advantageously substantially closed or surrounding, so that an overall largely closed unit is formed. Openings can of course be provided for bushings of electrical lines and as ventilation openings.
- the cover may be shell-shaped, that is to say with a surface from which a side edge projects in essential areas. It can cover both the surface of the component carrier as well as on the side to reach the carrier device. It is possible, the cover only on the support device to hold or attach fasteners such as pins or screws in the carrier device.
- the cover may be applied to the component carrier or spacer to the component carrier. It is thus possible, for example, to fix the component carrier to the cover in such a way that it is pressed by the latter against the carrier device and advantageously bears against it via spacers.
- the support means at least in its outer region on a protruding side edge, which may be wholly or largely encircling.
- the support device itself form a shell-like receiving space for receiving especially the supply part and the fan device.
- These parts can be secured in this receiving space, advantageously they are attached directly to the support means.
- the receiving space can be closed by a cover.
- this rests substantially on the protruding side edges of the support means. It can be a kind of flat lid.
- it can be provided, in particular in the case of a component carrier engaging the essential surface of the induction heater, that the cover rests against it as little as possible in order not to bend it.
- a spacer may be provided in the middle region of the carrier device and, in addition to a laterally outer attachment, bring about a central fastening or fixing of the supply part or of the component carrier. In this area can also attack covers, since their power is then passed through the connection via the spacer directly to the support means.
- Such spacers may be integrally connected to the carrier device or be an integral part. Especially when trained as plastic parts, the spacers can stand out.
- a support member may be a planar support of the induction coil or carry the induction coil.
- Another carrier part can carry or be connected to the supply part or its component carrier.
- the support members may be interconnected, with a fixed and simultaneously releasable mechanical connection provides an advantageous installation and repair options.
- a first carrier part may be substantially disc-like and flat.
- a second carrier part may also have a kind of disc, wherein in particular a side edge protrudes to form a shell-like receiving space for the supply part.
- the side edge may be substantially circumferential with the same height.
- the component carrier can be fastened, for example via spacers, to the second carrier part.
- the spacers can thereby project integrally from the second carrier part.
- For closing the assembly or the receiving space can then be provided a substantially disc-like cover, as has already been described above.
- a peripheral side edge of the assembly or a cover in certain areas forms the entire side edge, wherein small sections with openings or recesses may be present.
- the cutout can be used primarily for easier insertion of the supply part with the protruding connections. This interruption can be locked or covered in the side edge by a corresponding protruding section on the other part.
- Such a cutout is particularly advantageously provided on the part of the induction heating device to which the component carrier is fastened, in particular if the Component carrier is prefixed to a shell-like cover before attaching to the carrier device.
- a single component carrier for the supply part is provided for a simpler construction of the heater.
- both power electronics and control electronics are arranged.
- the components of the power electronics in particular those which are less prone to interference, lie on the side facing the induction coil side. This is especially advantageous if the component carrier is located as far away from the induction coil on the unit.
- the parts of the control electronics in particular sensitive components, arranged on the opposite side of the component carrier.
- the supply part or the power electronics for the induction heater is advantageously constructed with a single transistor inverter. This can form a parallel resonant circuit with the induction coil to limit the complexity of the component. Furthermore, an optimal adaptation to the induction coil can take place, in particular with regard to the electrical parameters.
- the power electronics advantageously has a heat sink on which, in particular, an aforementioned transistor converter or other power components are arranged.
- This heat sink can also serve as one of the abovementioned spacers, for example.
- it because of its stable construction made of aluminum, it can be installed mechanically firmly connecting or force-transmitting.
- the fan device which mainly cools the supply part or a power electronics, can be arranged between the induction coil and the component carrier or the supply part, that is, completely integrated into the structural unit of the induction device. She is for control and power supply advantageously connected to the supply part or the component carrier.
- a cooling air guide can be designed so that cooling air is introduced or sucked in at one side remote from the induction coil, which is usually the underside in use, by means of one or more defined predefined suction openings. These suction openings are arranged close to the fan device, in particular directly below.
- the fan device blows the cooling air first against the supply part or the power electronics or a heat sink provided for this purpose. Subsequently, the cooling air flow is passed past the other power electronics and the other control electronics. Thereafter, it can flow out of the heater.
- a certain air gap of a few millimeters is provided between the induction coil and the underside of the cooktop panel.
- the cooling air can escape to the outside, wherein preferably a substantially radially outwardly propagating and the entire induction coil sweeping cooling air flow is generated.
- air guide elements can be provided. So even a cooling of the induction coil is possible.
- the temperature compatibility of conventional induction coils is far above that of electrical components, usually at over 200 ° C.
- the heating device may have a temperature sensor.
- the temperature sensor is advantageously designed so that it rests on the underside with heat-transmitting contact both for defined positioning and for temperature measurement. In the case of a cooling air duct extending through the middle, this is led past the temperature sensor.
- the finished structural unit of the induction heating device projects laterally only slightly beyond the induction coil.
- a relatively compact construction of the entire unit is achieved.
- this makes it very well possible to arrange such an induction heating device in a cooktop trough, in addition to other heating devices, such as radiant heaters, in a relatively narrow and space-saving manner.
- spacer elements can be provided or formed, in particular in the outer region and / or a central central region. They protrude above the induction coil and serve to be applied to a cooktop plate running above it for a defined distance.
- a hob according to the invention has a plurality of heating devices, of which at least one is an aforementioned induction heater.
- the heaters are attached to the cooking hob, in particular either on a bottom side of the carrier tray or on a top surface of the cooktop plate.
- Induction heaters and conventional radiant heaters combined.
- the cooktop cavity has an operating device which has operating elements and a controller.
- operation-dependent control signals can be generated, which are guided at least directly to an induction heater or its control electronics.
- a power supply of the hob is provided and electrical leads directly from the power supply to the power electronics of the supply part of the induction heater.
- the supply part undertakes the application of power to the induction coil.
- any other power electronics which is usually provided centrally for the supply of multiple induction coils omitted.
- a hob with controls such as touch switches and electromechanical energy regulator can be provided, as it is known from DE 198 33 983 A1 are known. They contain a clocking mechanical switch that generates switching signals or, when the radiant heaters are connected, directly applies power to them. With appropriate coordination, these electrical switching signals can also be given to the control electronics of an induction heater. On the one hand, this can detect the set power level in continuous operation and then adjust to the induction coil for a continuous power supply with the appropriate power level. On the other hand, it can operate the induction coil clocking similar to a radiant heater, so only for certain times, but then with full power.
- an induction heater 11 is shown disassembled in the upper part into its essential parts.
- An induction coil 13 consists of several turns 14 of a coil wire 15 with an inner terminal 16a and an outer terminal 16b.
- a temperature sensor 18 In the central area is a temperature sensor 18 with lead 19.
- the induction coil 13 is supported by a carrier device 20 and is arranged thereon.
- the support means 20 is advantageously made of plastic and is substantially flat and plate-like. They have molded spacers 22, whose function will be discussed in more detail. Furthermore, what can Fig. 4 it can be seen better, elongated and flat ferrite cores 25 are introduced into corresponding receptacles 24 on the underside and secured thereto.
- the carrier device 20 on openings 27, through which the terminals 16 of the induction coil 13 and the terminals 19 of the temperature sensor 18 can be guided downwards.
- the electrical system 30 or a component carrier 31, in particular a printed circuit board It carries on its upper side mainly the power electronics 33 and on its underside mainly the control electronics 35.
- the power electronics 33 includes, for example, a transistor 34 together with heat sink 35.
- Other components of the power electronics 33 are those that are usually present in the power electronics of an induction heating.
- the components of the control electronics 37 are also typical components, in particular ICs or smaller components.
- a ventilation device 39 advantageously an integrated fan such as a radial fan is mounted or attached to the supply part 30, in particular with direct cooling effect for the heat sink 35 and thus the transistor 34th
- a cover 40 is mounted on the induction device 11. It consists of a substantially flat cover plate 41, from which a substantially peripheral side edge 42 protrudes.
- the cover 40 is advantageously made of plastic.
- an aluminum plate 26 can be arranged in the assembled state for shielding the supply part 30 lying thereunder.
- the composite induction heater 11 is shown.
- the cover 40 and / or its side edge 42 extend substantially all the way round to the carrier device 20 or its outer edge, so as to form a closed structural unit.
- the induction coil 13 rests directly on the carrier device 20.
- the supply part 30 and the component carrier 31 is applied and in particular also screwed or fastened.
- the terminals 16 of the induction coil 13 are attached to corresponding terminals of the supply part 30, for example, the coil wire 15 soldered directly to contact fields.
- a cooling air intake takes place by indicated cooling air openings 44 in the lower part of the cover 40 and in the cover 41.
- Cooling air flow passes through the cooling air openings 44 and to the cooling body 35. From there, the cooling air flows over the other surface of the component carrier 31 or the power electronics 33. Thereafter it passes through the central opening 27 past the temperature sensor 18 and spreads between the underside of an overlying hob plate and the top of the induction coil 13 radially outward. This allows all swept parts to be cooled.
- Fig. 2 is a modification of the same induction coil 113 as in Fig. 1 shown. This is applied to a first support means 120a, which is only a flat plate with corresponding receptacles 124a for ferrite cores 125.
- the second part of the support means is the lower part 120b.
- both spacers 122 and side edges 121 are formed, which are advantageously formed substantially circumferentially and the induction heater 111 final.
- the supply part 130 as well as the fan device 139 corresponds to those Fig. 1 , Completed the assembly is down through a cover 140, which consists only of a flat cover plate 141, so no side edges or the like. having.
- the induction coil 113 As well as the supply part 130 abut on a two-piece support means with the upper support 120a and the lower support 120b.
- the supply part 130 and the component carrier 131 abut against the spacers 122 and are fastened.
- the carrier device is formed in two parts and has itself the side edge 121.
- the cover thus has no margin.
- Fig. 3 is again, similar to the Fig. 1 and 2 , the same induction coil 213 is provided together with the upper part of a carrier 220a. Also supply part 230 and fan device 239 corresponding to those of the previous figures.
- the carrier device is here also provided with a lower carrier 220b, that is to say with a two-part carrier device. However, the spacers 222 are formed as separate components and are just introduced separately.
- the lower carrier 220b in turn has the protruding side edge 221.
- the cover 240 down corresponds to the one out Fig. 2 , So is only a flat cover plate 241.
- Fig. 4 the structure of the induction heater 11 is off Fig. 1 shown in more detail.
- the round induction coil 13 is placed on the carrier device 20 or is placed.
- spoke-like receptacles 24 are formed, in which the flat ferrite cores 25 can be inserted and fixed.
- the correspondingly shaped aluminum plate 26 is placed, which has at the same points openings 27 as well as the support means 20, in particular for the passage of terminals.
- the spacers 22 also project through the aluminum plate 26. It can be seen how a short side edge piece 21 protrudes from the carrier device 20 at one point. This will be discussed in more detail below.
- Fig. 5 is shown from a slightly different perspective, the entire assembly of the induction heater 11.
- the supply part 30 has a component carrier 31, on which the power electronics 33 is seated, as well as the transistor 34 together with the heat sink 35.
- the fan 39 directly adjoins the heat sink 35 and blows the cooling air directly onto it. It should be noted that the component carrier 31 stops short of the transistor 34 and thus the heat sink 35 projects beyond it.
- connection section 32 has at least two plug-in lugs, which are provided in particular for a mains connection, ie form the power connection or the connection from the outside to the power electronics 33.
- a control connection to the control electronics 37 is not shown, but can easily be done via corresponding plug-in lugs or a tab connection.
- the cover 40 Under the component carrier 31 is the cover 40, which is formed substantially cup-like. In this case, however, a recess in the side edge 42 is provided in the region of the connection section 32. Furthermore, here extends their lower cover plate 41 accordingly so far that it also supports the connection portion 32 and covers down.
- the recess 43 in the side edge 42 thus serves to allow the connection section 32 to protrude from the otherwise closed induction heating device 11.
- the small piece of side edge 21 is provided on the carrier device 20.
- Fig. 6 is shown in an oblique top view, as the supply part 30 is inserted into the cover 40. It will be appreciated that the fan 39 is close to the heat sink 35. Furthermore, it can be seen how the connecting portion 32 protrudes through the recess 43 to the outside and thus is easily accessible. Furthermore, it can be seen that the component carrier 31 is covered in approximately two-thirds of the surface of the cover plate 41, wherein it is substantially triangular in shape and does not quite follow the round shape of the cover plate 41. At the bottom of the component carrier 31, the control electronics 37 is still arranged, which, however, is not visible here.
- Fig. 7 an entire hob cavity 50 is shown. It consists of a hob plate 51, for example made of glass ceramic, which with a circumferential frame 52 is provided, for example made of metal.
- a circumferential frame 52 is provided, for example made of metal.
- different heaters are arranged, in this embodiment, the two left heaters radiant heaters 55 and the two right different sized induction heaters 11 according to the invention.
- a mains connection 57 is provided in the rear central region, with which the hob cavity 50 can be connected, for example, as usual to a three-phase connection in a household.
- connecting cables 58a go directly to the two induction heating devices 11 or their connection sections 32.
- connection cables 58b go to a control device 60, which undertakes a direct power supply to the radiant heaters 55.
- the controller 60 for example, have touch switches for an operator, which are marked on the top of the hob plate 51 by corresponding markings 61.
- control signals or operating commands can be entered, in particular for selecting a hotplate or a heater and for setting a power level.
- the control 60 does this internally, for example via power relays, which connect the respectively selected radiant heaters 55 to the mains connection 57 by means of the connection cables 58b and thus apply full power, in particular in cyclic operation.
- control lines 59 are provided by the controller 60, which supplies the corresponding commands to the respective control electronics 37 of the induction heating devices 11. Since the power electronics 33 is connected via the connection cable 58 a directly to the power supply terminal 57, so the control electronics 37 at the induction heater 11 directly make the power or control.
- the induction heating 11 according to the invention in the hob according to the invention 50 are formed by the outer dimensions corresponding to conventional heaters such as radiant heaters 55.
- conventional heaters such as radiant heaters 55.
- the hob requires 50 no central line electronics or power supply.
- a mains connection 57 is inevitably provided in each hob cavity anyway.
- the induction heating devices 11 according to the invention can also be varied freely with regard to their arrangement. In the hob 50 only connection cable 58 and control lines 59 are to be laid, but this is not a major problem.
- the induction heaters 11 are advantageously provided with similar dimensions as the radiant heaters 55, in particular also with respect to their height. Thus, under certain circumstances even the same fasteners with spring clips or the like. be used, which allows a freer arrangement of induction heaters in a so-called mixed hob.
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Induction Heating (AREA)
- Induction Heating Cooking Devices (AREA)
- Baking, Grill, Roasting (AREA)
- Cookers (AREA)
Abstract
Description
Die Erfindung betrifft eine Induktionsheizeinrichtung für eine Kochstelle sowie eine Kochfeldmulde mit einer solchen Induktionsheizeinrichtung.The invention relates to an induction heater for a cooking area and a hob with such an induction heater.
Der Aufbau einer Kochfeldmulde mit Induktionsheizeinrichtungen ist beispielsweise aus der
Des Weiteren ist es aus der
Die
Die
Der Erfindung liegt die Aufgabe zugrunde, eine eingangs genannte Induktionsheizeinrichtung sowie eine damit versehene Kochfeldmulde zu schaffen, mit denen Probleme des Standes der Technik beseitigt werden können und vor allem ein gewünschter Aufbau einer Kochfeldmulde auf verschiedenartige Weise möglich ist.The invention has for its object to provide an induction heater mentioned above and provided therewith hob hob with which problems of the prior art can be eliminated and above all, a desired structure of a hob cavity in various ways is possible.
Gelöst wird diese Aufgabe durch eine Induktionsheizeinrichtung mit den Merkmalen des Anspruchs 1 sowie eine Kochfeldmulde mit den Merkmalen des Anspruchs 20. Vorteilhafte sowie bevorzugte Ausgestaltungen der Erfindung sind Gegenstand der weiteren Ansprüche und werden im Folgenden näher erläutert. Der Wortlaut der Ansprüche wird durch ausdrückliche Bezugnahme zum Inhalt der Beschreibung gemacht.This object is achieved by an induction heater with the features of claim 1 and a hob with the features of
Erfindungsgemäß ist vorgesehen, dass die Induktionsspule an einer Trägereinrichtung angeordnet ist bzw. befestigt ist, was auch dadurch erfolgen kann, dass ein Spulendraht an der Trägereinrichtung aufgewickelt wird. An der Trägereinrichtung wird zum einen ein Versorgungsteil angeordnet, welches zugeführte Spannung, insbesondere einphasige Netzspannung, in eine Leistungsansteuerung für die Induktionsspule umsetzt. Dazu weist das Versorgungsteil eine Leistungselektronik und eine Steuerelektronik auf, wozu die Induktionsheizeinrichtung elektrische Leistungsanschlüsse und elektrische Steueranschlüsse aufweist. Des weiteren ist eine Lüftereinrichtung vorgesehen, welche zumindest den Leistungsteil kühlt bzw. Kühlluft zuführt. Schließlich ist die Induktionsheizeinrichtung als montagefertige bzw. anschlussfertige Baueinheit ausgebildet. Dies bedeutet, dass sie soweit vorgefertigt ist, dass sie nur noch in eine Kochfeldmulde bei deren Zusammenbau eingesetzt und elektrisch angeschlossen werden muss. Weitere Schritte sind vorteilhaft nicht erforderlich.According to the invention, it is provided that the induction coil is arranged or fastened to a carrier device, which can also be done by winding a coil wire onto the carrier device. On the support means is on the one hand, a supply part arranged, which converts supplied voltage, in particular single-phase mains voltage, into a power drive for the induction coil. For this purpose, the supply part has power electronics and control electronics, for which purpose the induction heating device has electrical power connections and electrical control connections. Furthermore, a fan device is provided which at least cools the power unit or supplies cooling air. Finally, the induction heater is designed as a ready to install or ready to connect unit. This means that it is prefabricated so far that it only needs to be used in a hob cavity during assembly and electrically connected. Further steps are advantageously not required.
Somit ist es durch die Erfindung möglich, den Zusammenbau eines Kochfeldes mit zumindest einer derartigen Induktionsheizeinrichtung schnell und einfach durchzuführen. Des weiteren ist die Induktionsheizeinrichtung eine autarke Funktionseinheit, die genauso wie ansonsten auch beispielsweise Strahlungsheizkörper sehr einfach angeschlossen werden kann und keine zusätzliche Leistungselektronik benötigt. So sind beispielsweise in einer sogenannten Vierer-Kochfeldmulde vier Heizeinrichtungen einzusetzen, von denen eine beliebige Anzahl durch erfindungsgemäße Induktionsheizeinrichtungen gebildet sein kann. Für den Aufbau der Kochfeldmulde spielt dies keine wesentliche Rolle, da im Vergleich zu bekannten Induktionskochfeldern aus dem Stand der Technik die separate Leistungsversorgung bzw. Leistungselektronik wegfällt. Dies weist beispielsweise auch den Vorteil auf, dass der ansonsten für die zentrale oder gemeinsame Leistungsversorgung benötigte Raum frei wird. Dies erhöht wiederum den Gestaltungsspielraum für die Anordnung der Heizeinrichtungen an der Kochfeldmulde. Des weiteren können so auch kostengünstig kleinere Serien von jeweils völlig beliebig und unterschiedlich angeordneten Heizeinrichtungen mit einer Kombination aus Induktionsheizeinrichtungen und Strahlungsheizeinrichtungen geschaffen werden.Thus, it is possible by the invention, the assembly of a hob with at least one such induction heating fast and easy to do. Furthermore, the induction heater is a self-sufficient functional unit that can be very easily connected as well as otherwise, for example radiant heater and no additional power electronics needed. For example, in a so-called four-hob hob four heaters to use, of which any number may be formed by induction heating according to the invention. For the construction of the cooktop cavity, this does not play a significant role, since compared to known induction cooktops from the prior art, the separate power supply or power electronics is eliminated. This also has the advantage, for example, that the space otherwise required for the central or common power supply becomes available. This in turn increases the scope for the arrangement of the heaters on the hob. Furthermore, it is also possible to provide smaller series of heating devices of any desired and differently arranged type having a combination of induction heating devices and radiant heating devices.
Vorteilhaft ist die Induktionsspule flach und besteht aus einer Lage von nebeneinander aufgewickelten Leitern, ist also einlagig. Dazu ist auch die Trägereinrichtung im wesentlichen flach, beispielsweise scheibenartig. Sie unterstützt die Induktionsspule vollflächig bzw. auf deren gesamter Fläche, wenngleich sie einzelne Öffnungen oder Durchbrüche aufweisen kann.Advantageously, the induction coil is flat and consists of a layer of coiled conductors, so it is single-layered. For this purpose, the support means is substantially flat, such as a disk-like. It supports the induction coil over the entire surface or on its entire surface, although it may have individual openings or openings.
Das Versorgungsteil, welches eine Anzahl von Bauteilen aufweisen kann, trägt diese vorteilhaft auf einer Leiterplatte bzw. allgemein auf einem Bauteilträger. Dieser verläuft vorteilhaft im wesentlichen parallel zu der Induktionsspule. Besonders vorteilhaft sind auf einem einzigen Bauteilträger sämtliche elektrischen Bauteile der Steuerelektronik und/oder der Leistungselektronik angebracht, insbesondere beidseitig.The supply part, which can have a number of components, this advantageously carries on a printed circuit board or generally on a component carrier. This advantageously extends substantially parallel to the induction coil. All electrical components of the control electronics and / or power electronics are particularly advantageously mounted on a single component carrier, in particular on both sides.
Die Lüftereinrichtung kann vorteilhaft ein üblicher integrierter und relativ kleiner Lüfter sein, der lediglich noch elektrisch angeschlossen werden muss. Dieser Lüfter kann einerseits an der Trägereinrichtung befestigt sein, wobei er vorteilhaft direkt daran befestigt ist durch Schrauben oder Rastverbindungen odgl. Er kann aber auch direkt an dem Bauteilträger befestigt bzw. damit verbunden sein. Über Abstandshalter odgl. kann er auch an der Trägereinrichtung anliegen.The fan device may advantageously be a conventional integrated and relatively small fan, which only has to be electrically connected. This fan can be attached on the one hand to the support means, wherein it is advantageously attached directly thereto by screws or locking connections or the like. But it can also be attached directly to the component carrier or connected to it. About spacers or the like. it can also rest against the carrier device.
Vorteilhaft sind zwischen Bauteilträger und Trägereinrichtung Abstandshalter vorgesehen, die für die genaue Positionierung des Bauteilträgers relativ zu der Trägereinrichtung und somit innerhalb der Induktionseinrichtung sorgen. Einerseits ist es hier möglich, lediglich über eine von außen angedrückte Anlage die Positionierung vorzunehmen. Andererseits kann der Bauteilträger mit der Trägereinrichtung mechanisch fest verbunden sein, beispielsweise über vorgenannte Abstandshalter. Eine solche Verbindung sollte lösbar sein, insbesondere für den Fall einer Reparatur oder eines Austauschs.Advantageously, spacers are provided between the component carrier and the carrier device, which provide for the exact positioning of the component carrier relative to the carrier device and thus within the induction device. On the one hand, it is possible here to carry out the positioning only by means of a system pressed from the outside. On the other hand, the component carrier may be mechanically fixedly connected to the carrier device, for example via the aforementioned spacers. Such a connection should be solvable, especially in the event of repair or replacement.
Grundsätzlich kann eine Abdeckung vorgesehen sein, welche verschiedene Bauteile der Induktionsheizeinrichtung abdeckt bzw. umgibt, insbesondere den Bauteilträger. Die Abdeckung ist dabei vorteilhaft im wesentlichen geschlossen bzw. umgebend, so dass eine insgesamt weitgehend geschlossene Baueinheit entsteht. Öffnungen können selbstverständlich für Durchführungen von elektrischen Leitungen sowie als Lüftungsöffnungen vorgesehen sein.In principle, a cover may be provided which covers or surrounds various components of the induction heating device, in particular the component carrier. The cover is advantageously substantially closed or surrounding, so that an overall largely closed unit is formed. Openings can of course be provided for bushings of electrical lines and as ventilation openings.
Die Abdeckung kann gemäß einem ersten Ausführungsbeispiel schalenartig sein, also mit einer Fläche, von welcher in wesentlichen Bereichen ein Seitenrand absteht. Sie kann sowohl die Fläche des Bauteilträgers überdecken als auch an der Seite bis zu der Trägereinrichtung reichen. Dabei ist es möglich, die Abdeckung ausschließlich an der Trägereinrichtung zu haltern bzw. Befestigungsmittel wie Stifte oder Schrauben in die Trägereinrichtung greifen zu lassen. Die Abdeckung kann an dem Bauteilträger oder dem Abstandshalter zu dem Bauteilträger angelegt sein. So ist es beispielsweise möglich, den Bauteilträger derart an der Abdeckung zu fixieren, dass er von dieser gegen die Trägereinrichtung gedrückt wird und vorteilhaft über Abstandshalter daran anliegt.According to a first exemplary embodiment, the cover may be shell-shaped, that is to say with a surface from which a side edge projects in essential areas. It can cover both the surface of the component carrier as well as on the side to reach the carrier device. It is possible, the cover only on the support device to hold or attach fasteners such as pins or screws in the carrier device. The cover may be applied to the component carrier or spacer to the component carrier. It is thus possible, for example, to fix the component carrier to the cover in such a way that it is pressed by the latter against the carrier device and advantageously bears against it via spacers.
Gemäß einer weiteren Ausbildungsmöglichkeit der Erfindung weist die Trägereinrichtung zumindest in ihrem Außenbereich einen abstehenden Seitenrand auf, der ganz oder weitgehend umlaufend sein kann. So kann die Trägereinrichtung selber einen schalenartigen Aufnahmeraum bilden zur Aufnahme vor allem des Versorgungsteils sowie der Lüftereinrichtung. Diese Teile können in diesem Aufnahmeraum befestigt sein, vorteilhaft sind sie direkt an der Trägereinrichtung befestigt. Der Aufnahmeraum kann durch eine Abdeckung abgeschlossen werden. Hier kann es vorgesehen sein, dass diese im wesentlichen auf den abstehenden Seitenrändern der Trägereinrichtung aufliegt. Dabei kann sie eine Art flacher Deckel sein. Des weiteren kann vor allem bei einem die wesentliche Fläche der Induktionsheizeinrichtung einnehmenden Bauteilträger vorgesehen sein, dass die Abdeckung an diesem möglichst wenig anliegt um ihn nicht zu verbiegen. Alternativ kann im Mittelbereich der Trägereinrichtung ein Abstandshalter vorgesehen sein und zusätzlich zu einer seitlich äußeren Befestigung eine zentrale Befestigung oder Fixierung des Versorgungsteils bzw. des Bauteilträgers bewirken. In diesem Bereich können auch Abdeckungen angreifen, da ihre Kraft dann durch die Verbindung über den Abstandshalter direkt an die Trägereinrichtung geleitet ist. Derartige Abstandshalter können einteilig mit der Trägereinrichtung verbunden bzw. integraler Bestandteil sein. Vor allem bei einer Ausbildung als Kunststoffteile können die Abstandshalter davon abstehen.According to a further embodiment of the invention, the support means at least in its outer region on a protruding side edge, which may be wholly or largely encircling. Thus, the support device itself form a shell-like receiving space for receiving especially the supply part and the fan device. These parts can be secured in this receiving space, advantageously they are attached directly to the support means. The receiving space can be closed by a cover. Here it can be provided that this rests substantially on the protruding side edges of the support means. It can be a kind of flat lid. Furthermore, it can be provided, in particular in the case of a component carrier engaging the essential surface of the induction heater, that the cover rests against it as little as possible in order not to bend it. Alternatively, a spacer may be provided in the middle region of the carrier device and, in addition to a laterally outer attachment, bring about a central fastening or fixing of the supply part or of the component carrier. In this area can also attack covers, since their power is then passed through the connection via the spacer directly to the support means. Such spacers may be integrally connected to the carrier device or be an integral part. Especially when trained as plastic parts, the spacers can stand out.
Es ist möglich, die Trägereinrichtung für die Induktionsheizung aus mindestens zwei Trägerteilen aufzubauen. Ein Trägerteil kann dabei eine flächige Unterstützung der Induktionsspule sein bzw. die Induktionsspule tragen. Ein anderer Trägerteil kann den Versorgungsteil bzw. dessen Bauteilträger tragen oder mit ihm verbunden sein. Vorteilhaft können die Trägerteile miteinander verbunden sein, wobei eine feste und gleichzeitig lösbare mechanische Verbindung eine vorteilhafte Montage sowie Reparaturmöglichkeiten bietet.It is possible to construct the carrier device for the induction heating from at least two carrier parts. A support member may be a planar support of the induction coil or carry the induction coil. Another carrier part can carry or be connected to the supply part or its component carrier. Advantageously, the support members may be interconnected, with a fixed and simultaneously releasable mechanical connection provides an advantageous installation and repair options.
Ein erster Trägerteil kann dabei im wesentlichen scheibenartig und flach sein. Ein zweiter Trägerteil kann ebenso eine Art Scheibe aufweisen, wobei vor allem ein Seitenrand absteht um einen schalenartigen Aufnahmeraum für das Versorgungsteil zu bilden. Der Seitenrand kann im wesentlichen umlaufend sein mit gleicher Höhe. In dem Aufnahmeraum kann der Bauteilträger beispielsweise über Abstandshalter an dem zweiten Trägerteil befestigt sein. Die Abstandshalter können dabei integral von dem zweiten Trägerteil abstehen. Zum Verschließen der Baueinheit bzw. des Aufnahmeraums kann dann eine im wesentlichen scheibenartige Abdeckung vorgesehen sein, wie sie zuvor bereits beschrieben worden ist.A first carrier part may be substantially disc-like and flat. A second carrier part may also have a kind of disc, wherein in particular a side edge protrudes to form a shell-like receiving space for the supply part. The side edge may be substantially circumferential with the same height. In the receiving space, the component carrier can be fastened, for example via spacers, to the second carrier part. The spacers can thereby project integrally from the second carrier part. For closing the assembly or the receiving space can then be provided a substantially disc-like cover, as has already been described above.
Vorteilhaft ist allgemein vorgesehen, dass ein umlaufender Seitenrand der Baueinheit bzw. eine Abdeckung in gewissen Bereichen den gesamten Seitenrand bildet, wobei kleine Abschnitte mit Öffnungen oder Ausnehmungen vorhanden sein können. Durch diese können Anschlüsse odgl. des Versorgungsteils nach außen ragen. Der Ausschnitt kann vor allem zum leichteren Einsetzen des Versorgungsteils mit den abstehenden Anschlüssen dienen. Verschlossen oder abgedeckt werden kann diese Unterbrechung im Seitenrand durch einen entsprechenden abstehenden Abschnitt an dem anderen Teil. Besonders vorteilhaft ist ein solcher Ausschnitt an dem Teil der Induktionsheizeinrichtung vorgesehen, an welchem der Bauteilträger befestigt ist, insbesondere dann, wenn der Bauteilträger an einer schalenartigen Abdeckung vorfixiert wird vor Anfügen an die Trägereinrichtung.Advantageously, it is generally provided that a peripheral side edge of the assembly or a cover in certain areas forms the entire side edge, wherein small sections with openings or recesses may be present. Through these connections can odgl. of the supply part protrude outward. The cutout can be used primarily for easier insertion of the supply part with the protruding connections. This interruption can be locked or covered in the side edge by a corresponding protruding section on the other part. Such a cutout is particularly advantageously provided on the part of the induction heating device to which the component carrier is fastened, in particular if the Component carrier is prefixed to a shell-like cover before attaching to the carrier device.
Vorteilhaft ist für einen einfacheren Aufbau der Heizeinrichtung lediglich ein einziger Bauteilträger für das Versorgungsteil vorgesehen. Daran sind sowohl Leistungselektronik als auch Steuerelektronik angeordnet. Dabei kann es vorgesehen sein, dass die Bauteile der Leistungselektronik, insbesondere solche, die für Störfelder wenig anfällig sind, an der zu der Induktionsspule hin weisenden Seite liegen. Dies ist vor allem dann von Vorteil, wenn der Bauteilträger möglichst weit entfernt von der Induktionsspule an der Baueinheit liegt. Besonders vorteilhaft sind die Teile der Steuerelektronik, insbesondere empfindliche Bauteile, an der abgewandten Seite des Bauteilträgers, angeordnet.Advantageously, only a single component carrier for the supply part is provided for a simpler construction of the heater. At it both power electronics and control electronics are arranged. It may be provided that the components of the power electronics, in particular those which are less prone to interference, lie on the side facing the induction coil side. This is especially advantageous if the component carrier is located as far away from the induction coil on the unit. Particularly advantageous are the parts of the control electronics, in particular sensitive components, arranged on the opposite side of the component carrier.
Das Versorgungsteil bzw. die Leistungselektronik für die Induktionsheizeinrichtung ist vorteilhaft mit einem einzigen Transistor-Umrichter aufgebaut. Dieser kann einen Parallel-Schwingkreis mit der Induktionsspule bilden zur Begrenzung des Bauteilaufwandes. Des weiteren kann eine optimale Anpassung an die Induktionsspule erfolgen, insbesondere hinsichtlich der elektrischen Parameter.The supply part or the power electronics for the induction heater is advantageously constructed with a single transistor inverter. This can form a parallel resonant circuit with the induction coil to limit the complexity of the component. Furthermore, an optimal adaptation to the induction coil can take place, in particular with regard to the electrical parameters.
Die Leistungselektronik weist vorteilhaft einen Kühlkörper auf, an dem insbesondere ein vorgenannter Transistor-Umrichter oder sonstige Leistungs-Bauteile angeordnet sind. Dieser Kühlkörper kann auch beispielsweise als einer der vorgenannten Abstandshalter dienen. Ebenso kann er wegen seiner stabilen Ausbildung aus Aluminium mechanisch fest verbindend oder kraftübertragend eingebaut sein.The power electronics advantageously has a heat sink on which, in particular, an aforementioned transistor converter or other power components are arranged. This heat sink can also serve as one of the abovementioned spacers, for example. Likewise, because of its stable construction made of aluminum, it can be installed mechanically firmly connecting or force-transmitting.
Die Lüftereinrichtung, welche vor allem das Versorgungsteil bzw. eine Leistungselektronik kühlt, kann zwischen der Induktionsspule und dem Bauteilträger bzw. dem Versorgungsteil angeordnet sein, also vollständig integriert in die Baueinheit der Induktionseinrichtung. Dabei ist sie zur Steuerung und Leistungsversorgung vorteilhaft mit dem Versorgungsteil bzw. dem Bauteilträger verbunden.The fan device, which mainly cools the supply part or a power electronics, can be arranged between the induction coil and the component carrier or the supply part, that is, completely integrated into the structural unit of the induction device. She is for control and power supply advantageously connected to the supply part or the component carrier.
Eine Kühlluftführung kann so ausgebildet sein, dass an einer von der Induktionsspule abgewandten Seite, welche im Einsatz üblicherweise die Unterseite ist, durch eine oder mehrere definiert vorgegebene Ansaugöffnungen Kühlluft eingeführt bzw. angesaugt wird. Diese Ansaugöffnungen sind nahe an der Lüftereinrichtung angeordnet, insbesondere direkt darunter. Die Lüftereinrichtung bläst die Kühlluft zuerst gegen das Versorgungsteil bzw. die Leistungselektronik oder einen hierfür vorgesehenen Kühlkörper. Anschließend wird der Kühlluftstrom an der sonstigen Leistungselektronik und auch der sonstigen Steuerelektronik vorbeigeleitet. Danach kann er aus der Heizeinrichtung ausströmen. Hierfür ist es vorteilhaft vorgesehen, dass im Mittelbereich der Trägereinrichtung eine Öffnung vorgesehen ist, durch welche die Kühlluft austreten kann. Hierbei kann insbesondere für den Einbau unter einer Abdeckung wie einer Glaskeramik-Kochfeldplatte vorgesehen sein, dass zwischen Induktionsspule und Unterseite der Kochfeldplatte ein gewissen Luftspalt von einigen Millimetern vorgesehen ist. Durch diesen Zwischenraum kann die Kühlluft nach außen entweichen, wobei vorzugsweise ein im wesentlichen radial nach außen sich ausbreitender und die gesamte Induktionsspule überstreichender Kühlluftstrom erzeugt wird. Hierfür können auch Luftleitelemente vorgesehen sein. So ist auch noch eine Kühlung der Induktionsspule möglich. Dass die Kühlluft bereits sonstige Teile der Induktionsheizeinrichtung gekühlt hat und somit eine in der Regel recht hohe Temperatur erreicht hat, stört hier nicht. Die Temperaturverträglichkeit üblicher Induktionsspulen liegt weit über derjenigen von elektrischen Bauteilen, in der Regel bei über 200°C.A cooling air guide can be designed so that cooling air is introduced or sucked in at one side remote from the induction coil, which is usually the underside in use, by means of one or more defined predefined suction openings. These suction openings are arranged close to the fan device, in particular directly below. The fan device blows the cooling air first against the supply part or the power electronics or a heat sink provided for this purpose. Subsequently, the cooling air flow is passed past the other power electronics and the other control electronics. Thereafter, it can flow out of the heater. For this purpose, it is advantageously provided that in the central region of the support means an opening is provided through which the cooling air can escape. In this case, it can be provided in particular for installation under a cover, such as a glass-ceramic cooktop panel, that a certain air gap of a few millimeters is provided between the induction coil and the underside of the cooktop panel. Through this gap, the cooling air can escape to the outside, wherein preferably a substantially radially outwardly propagating and the entire induction coil sweeping cooling air flow is generated. For this purpose, air guide elements can be provided. So even a cooling of the induction coil is possible. The fact that the cooling air has already cooled other parts of the induction heater and thus has reached a generally quite high temperature, does not bother here. The temperature compatibility of conventional induction coils is far above that of electrical components, usually at over 200 ° C.
Durch die Anordnung einer Lüftereinrichtung direkt an der Heizeinrichtung, welche auch noch die Induktionsspule selber kühlen kann, ist es möglich, auf sonstige Wärmedämmung zu verzichten. So ist der Aufbau einfacher und ein Zusammenbau geht schneller von statten.By arranging a fan device directly to the heater, which also can cool the induction coil itself, it is possible to dispense with other thermal insulation. This makes assembly easier and assembly is quicker.
In einem freien Mittelbereich der Induktionsspule kann die Heizeinrichtung einen Temperatursensor aufweisen. Mit diesem kann die Temperatur einer darüber verlaufenden Abdeckung oder Kochfeldplatte erfasst werden. Dazu ist der Temperatursensor vorteilhaft so ausgebildet, dass er an der Unterseite mit wärmeübertragendem Kontakt anliegt sowohl zur definierten Positionierung als auch zur Temperaturmessung. Im Falle einer sich durch die Mitte erstreckenden Kühlluftführung wird diese an dem Temperatursensor vorbeigeführt.In a free central region of the induction coil, the heating device may have a temperature sensor. With this, the temperature of an overlying cover or hob plate can be detected. For this purpose, the temperature sensor is advantageously designed so that it rests on the underside with heat-transmitting contact both for defined positioning and for temperature measurement. In the case of a cooling air duct extending through the middle, this is led past the temperature sensor.
Erfindungsgemäß ist vorgesehen, dass die fertige Baueinheit der Induktionsheizeinrichtung seitlich nur wenig über die Induktionsspule selber übersteht. So wird ein relativ kompakter Aufbau der gesamten Baueinheit erreicht. Insbesondere ist es dadurch gut möglich, in einer Kochfeldmulde eine solche Induktionsheizeinrichtung neben anderen Heizeinrichtungen wie Strahlungsheizkörpern relativ eng und platzsparend anzuordnen.According to the invention, it is provided that the finished structural unit of the induction heating device projects laterally only slightly beyond the induction coil. Thus, a relatively compact construction of the entire unit is achieved. In particular, this makes it very well possible to arrange such an induction heating device in a cooktop trough, in addition to other heating devices, such as radiant heaters, in a relatively narrow and space-saving manner.
An der Trägereinrichtung für die Induktionsspule können, insbesondere im Außenbereich und/oder einem zentralen Mittelbereich, Distanzelemente vorgesehen bzw. ausgebildet sein. Sie stehen über die Induktionsspule über und dienen dazu, an eine darüber verlaufende Kochfeld-Platte angelegt zu werden für einen definierten Abstand.On the carrier device for the induction coil, spacer elements can be provided or formed, in particular in the outer region and / or a central central region. They protrude above the induction coil and serve to be applied to a cooktop plate running above it for a defined distance.
Eine erfindungsgemäße Kochfeldmulde weist mehrere Heizeinrichtungen auf, von denen mindestens eine eine vorgenannte Induktionsheizeinrichtung ist. Die Heizeinrichtungen sind an der Kochfeldmulde befestigt, insbesondere entweder an einer die Unterseite abschließenden Trägerwanne oder an einer die Oberseite abschließenden Kochfeldplatte. Insbesondere sind in einer solchen Kochfeldmulde erfindungsgemäße Induktionsheizeinrichtungen und herkömmliche Strahlungsheizkörper kombiniert.A hob according to the invention has a plurality of heating devices, of which at least one is an aforementioned induction heater. The heaters are attached to the cooking hob, in particular either on a bottom side of the carrier tray or on a top surface of the cooktop plate. In particular, in such a hob according to the invention Induction heaters and conventional radiant heaters combined.
Die Kochfeldmulde weist eine Bedieneinrichtung auf, welche Bedienelemente und eine Steuerung aufweist. So können bedienungsabhängige Steuersignale erzeugt werden, die zumindest direkt zu einer Induktionsheizeinrichtung bzw. deren Steuerelektronik geführt werden. Des weiteren ist ein Netzteil der Kochfeldmulde vorgesehen und elektrische Leitungen führen direkt von dem Netzteil zu der Leistungselektronik des Versorgungsteils der Induktionsheizeinrichtung. Abhängig von den Steuersignalen nimmt das Versorgungsteil die Leistungsbeaufschlagung der Induktionsspule vor. So kann eine sonstige Leistungselektronik, welche üblicherweise zentral vorgesehen ist für die Versorgung mehrerer Induktionsspulen, entfallen.The cooktop cavity has an operating device which has operating elements and a controller. Thus, operation-dependent control signals can be generated, which are guided at least directly to an induction heater or its control electronics. Furthermore, a power supply of the hob is provided and electrical leads directly from the power supply to the power electronics of the supply part of the induction heater. Depending on the control signals, the supply part undertakes the application of power to the induction coil. Thus, any other power electronics, which is usually provided centrally for the supply of multiple induction coils omitted.
Anstelle einer Steuerung einer Kochfeldmulde mit Bedienelementen wie beispielsweise Berührungsschaltern können auch elektromechanische Energieregler vorgesehen sein, wie sie aus der
Diese und weitere Merkmale gehen außer aus den Ansprüchen auch aus der Beschreibung und den Zeichnungen hervor, wobei die einzelnen Merkmale jeweils für sich allein oder zu mehreren in Form von Unterkombinationen bei einer Ausführungsform der Erfindung und auf anderen Gebieten verwirklicht sein und vorteilhafte sowie für sich schutzfähige Ausführungen darstellen können, für die hier Schutz beansprucht wird. Die Unterteilung der Anmeldung in einzelne Abschnitte sowie Zwischen-Überschriften beschränken die unter diesen gemachten Aussagen nicht in ihrer Allgemeingültigkeit.These and other features are apparent from the claims and from the description and drawings, wherein the individual features in each case alone or in the form of sub-combinations be realized in one embodiment of the invention and in other fields and can represent advantageous and protectable versions for which protection is claimed here. The subdivision of the application into individual sections as well as intermediate headings does not restrict the general validity of the statements made thereunder.
Ausführungsbeispiele der Erfindung sind in den Zeichnungen schematisch dargestellt und werden im Folgenden näher beschrieben. In den Zeichnungen zeigt:
- Fig. 1
- eine Induktionsheizeinrichtung hinsichtlich ihrer Einzelteile und in fertig montiertem Zustand,
- Fig. 2
- eine Variation der Induktionsheizeinrichtung aus
Fig. 1 , - Fig. 3
- eine weitere Variation der Induktionsheizeinrichtung aus
Fig. 1 , - Fig. 4
- eine detailliertere Ansicht einer Induktionsheizeinrichtung entsprechend
Fig. 1 mit einer einteiligen Trägereinrichtung, - Fig. 5
- der Zusammenbau einer Induktionsspule nach
Fig. 4 , an die von unten sowohl ein Bauteilträger als auch eine schalenartige Abdeckung angesetzt sind, - Fig. 6
- eine Ansicht von schräg oben auf die Anordnung des Bauteilträgers aus
Fig. 5 in der Abdeckung und - Fig. 7
- eine erfindungsgemäße Kochfeldmulde mit in einer Aufnahmewanne angeordneten Heizeinrichtungen und Glaskeramik-Kochfeldplatte darüber.
- Fig. 1
- an induction heater with regard to its individual parts and when fully assembled,
- Fig. 2
- a variation of the induction heater off
Fig. 1 . - Fig. 3
- another variation of the induction heater off
Fig. 1 . - Fig. 4
- a more detailed view of an induction heater accordingly
Fig. 1 with a one-piece support device, - Fig. 5
- the assembly of an induction coil after
Fig. 4 to which both a component carrier and a shell-like cover are attached from below, - Fig. 6
- a view from above obliquely on the arrangement of the component carrier
Fig. 5 in the cover and - Fig. 7
- a hob according to the invention with arranged in a receptacle heaters and glass ceramic hob plate above.
In
Die Induktionsspule 13 ist von einer Trägereinrichtung 20 getragen bzw. ist auf dieser angeordnet. Die Trägereinrichtung 20 besteht vorteilhaft aus Kunststoff und ist im wesentlichen flach und plattenartig. Sie angeformte Abstandshalter 22 aufweisen, auf deren Funktion noch genauer eingegangen wird. Des weiteren können, was aus
Unter der Trägereinrichtung 20 kommt die Elektrik 30 bzw. ein Bauteilträger 31, insbesondere eine Leiterplatte. Er trägt auf seiner Oberseite hauptsächlich die Leistungselektronik 33 und an seiner Unterseite hauptsächlich die Steuerelektronik 35. Die Leistungselektronik 33 umfasst beispielsweise einen Transistor 34 samt Kühlkörper 35. Weitere Bauteile der Leistungselektronik 33 sind solche, die üblicherweise in der Leistungselektronik einer Induktionsheizeinrichtung vorhanden sind. Die Bauteile der Steuerelektronik 37 sind ebenso typische Bauteile, insbesondere auch IC's oder kleinere Bauteile.Under the support means 20, the
Die Elektrik 30 bildet somit das Versorgungsteil und wird nachfolgend noch genauer beschrieben. Eine Lüfteinrichtung 39, vorteilhaft ein integrierter Lüfter wie beispielsweise ein Radiallüfter, wird an das Versorgungsteil 30 montiert bzw. angesetzt, insbesondere mit direkter Kühlwirkung für den Kühlkörper 35 und somit den Transistor 34.The
Von unten wird eine Abdeckung 40 an die Induktionseinrichtung 11 montiert. Sie besteht aus einer im wesentlichen flachen Abdeckplatte 41, von der aus ein im wesentlichen umlaufender Seitenrand 42 absteht. Die Abdeckung 40 ist vorteilhaft aus Kunststoff gefertigt.From below, a
Unterhalb der Trägereinrichtung 20 bzw. vor allem unterhalb der Induktionsspule 13 und der Ferritkerne 25 kann im zusammengebauten Zustand eine Aluminiumplatte 26 angeordnet sein zur Abschirmung des darunter liegenden Versorgungsteils 30.Below the
Ganz unten in
In
Das Versorgungsteil 130 entspricht ebenso wie die Lüftereinrichtung 139 derjenigen aus
Aus der zusammengebauten Induktionsheizeinrichtung 111 ist ersichtlich, wie die Induktionsspule 113 ebenso wie das Versorgungsteil 130 an einer zweiteiligen Trägereinrichtung mit dem oberen Träger 120a und dem unteren Träger 120b anliegen. Das Versorgungsteil 130 bzw. der Bauteilträger 131 liegen an den Abstandshaltern 122 an und sind befestigt. Im Vergleich zu
In
Aus dem zusammengebauten Zustand der Induktionsheizeinrichtung 211 ganz unten in
In
In
Der Bauteilträger 31 geht nach rechts in einen Anschlussabschnitt 32 über. Dieser Anschlussabschnitt 32 weist zumindest zwei Steckfahnen auf, welche insbesondere für einen Netzanschluss vorgesehen sind, also den Leistungsanschluss bzw. den Anschluss von außen an die Leistungselektronik 33 bilden. Ein Steueranschluss an die Steuerelektronik 37 ist nicht dargestellt, kann jedoch leicht über entsprechende Steckanschlussfahnen oder einen Flachsteckanschluss erfolgen.The
Unter dem Bauteilträger 31 befindet sich die Abdeckung 40, welche im wesentlichen schalenartig ausgebildet ist. Dabei ist jedoch in dem Bereich des Anschlussabschnitts 32 eine Ausnehmung im Seitenrand 42 vorgesehen. Des weiteren erstreckt sich hier ihre untere Abdeckplatte 41 entsprechend so weit, dass sie auch den Anschlussabschnitt 32 unterstützt bzw. nach unten abdeckt. Die Ausnehmung 43 im Seitenrand 42 dient also dazu, dass hier der Anschlussabschnitt 32 aus der ansonsten geschlossenen Induktionsheizeinrichtung 11 herausragen kann. Um die Ausnehmung 43 wiederum zu verschließen, ist das kleine Stück Seitenrand 21 an der Trägereinrichtung 20 vorgesehen.Under the
In
In
In der Aufnahmewanne ist im hinteren mittleren Bereich ein Netzanschluss 57 vorgesehen, mit dem die Kochfeldmulde 50 beispielsweise wie üblich an einen Drei-Phasen-Anschluss in einem Haushalt angeschlossen werden kann. Von dem Netzanschluss 57 gehen Anschlusskabel 58a direkt an die beiden Induktionsheizeinrichtungen 11 bzw. deren Anschlussabschnitte 32. Des weiteren gehen Anschlusskabel 58b an eine Steuereinrichtung 60, welche eine direkte Leistungsversorgung der Strahlungsheizkörper 55 übernimmt. Dazu kann die Steuerung 60 beispielsweise Berührungsschalter aufweisen für eine Bedienperson, welche an der Oberseite der Kochfeld-Platte 51 durch entsprechende Markierungen 61 gekennzeichnet sind. Damit können Steuersignale bzw. Bedienbefehle eingegeben werden, insbesondere zur Auswahl einer Kochstelle bzw. einer Heizeinrichtung sowie zum Einstellen einer Leistungshöhe. Für die Strahlungsheizkörper 55 macht dies die Steuerung 60 intern, beispielsweise über Leistungsrelais, die den jeweils ausgewählten Strahlungsheizkörper 55 mittels der Anschlusskabel 58b an den Netzanschluss 57 anschließen und somit mit voller Leistung beaufschlagen, insbesondere im Taktbetrieb.In the receptacle a
Für die Induktionsheizeinrichtungen 11 sind Steuerleitungen 59 von der Steuerung 60 vorgesehen, welche die entsprechenden Befehle an die jeweilige Steuerelektronik 37 der Induktionsheizeinrichtungen 11 liefert. Da die Leistungselektronik 33 über die Anschlusskabel 58a direkt mit dem Netzanschluss 57 verbunden ist, kann so die Steuerelektronik 37 an der Induktionsheizeinrichtung 11 direkt die Leistungsbeaufschlagung vornehmen bzw. steuern.For the
Wie aus
Claims (23)
- Induction heating device (11, 111, 211) for a hotplate, having an induction coil (13, 113, 213) which is arranged on or fastened on a support device (20, 120, 22), where:- a supply part (30, 130, 230) for converting the voltage supplied into a power control for the induction coil (13, 113, 213) is arranged on the support device (20, 120, 22),- the supply part has an electronic power unit (33, 133, 233) and an electronic control unit (37, 137, 237),- a fan device (39, 139, 239) is provided for at least the electronic power unit,- the induction heating device (11, 111, 211) has electrical power connections and electrical control connections and- the induction heating device is designed as a ready-to-install and/or ready-to-connect module,characterized in that the induction heating device (11, 111, 211) is a module being substantially closed to the outside and projecting as a complete module in its lateral extent only slightly beyond that of the induction coil (13, 113,213).
- Induction heating device according to Claim 1, characterized in that the support device (20, 120, 220) is flat, in particular disk-like, where the support device takes up the same surface area as the induction coil (13, 113, 213) or supports the same in full-surface manner.
- Induction heating device according to Claim 1 or 2, characterized in that the supply part (30, 130, 230) has a printed circuit board or component support (31, 131, 231) which is preferably substantially parallel to the induction coil (13, 113, 213) and carries the electronic power unit (33, 133, 233) and/or the electronic control unit (37, 137, 237).
- Induction heating device according to one of the preceding claims, characterized in that the fan device (39, 139, 239) is fastened, in particular directly fastened or connected, to the support device (20, 120, 220).
- Induction heating device according to one of the Claims 1 to 3, characterized in that the fan device (39, 139, 239) is directly fastened or connected to the component support (31, 131, 231) and also engages via spacers (22, 122, 222) on the support device (20, 120, 220).
- Induction heating device according to one of the preceding claims, characterized in that the component support (31, 131, 231) is applied via spacers (22, 122, 222) against the support device (20, 120, 220) and is in particular mechanically firmly connected to the support device via the spacers, with a cover (40, 41, 42) preferably covering or surrounding the component support (31), where in particular the cover has a substantially dish-like design and forms a reception space and both covers the surface of the component support and also extends at the sides (42) up to the support device (20) in such a way that the finished induction heating device (11) is a substantially sealed module.
- Induction heating device according to Claim 6, characterized in that the cover (40) is exclusively fastened to the support device (20) and/or via spacers (22) to a component support (31), preferably in the vicinity of the outer edge (42).
- Induction heating device according to one of Claims 1 to 6, characterized in that, at least in the outer area, the support device (120, 220) has a projecting, substantially circumferential lateral edge (121, 221) for forming a dish-like reception space.
- Induction heating device according to Claims 3 and 8, characterized in that a component support (131, 231) or a printed circuit board with the electronic power unit (133, 233), the electronic control unit (137, 237) and/or the fan device (139, 239), which in particular form the supply part, are fastened inside the reception space of the support device (120, 220) and preferably to the latter.
- Induction heating device according to Claim 8 or 9, characterized in that the dish-like reception space is terminated by a cover (140, 240), which essentially rests on the projecting lateral edges (121, 221) of the support device (120, 220) and is preferably a type of flat lid and in particular rests essentially in the area of the lateral edge.
- Induction heating device according to one of Claims 8 to 10, characterized in that at least one spacer (122, 222) is provided in the central area of the support device (120, 220) for the positionally accurate arrangement of the supply part (130, 230) or component support (131, 231) thereon, where in particular the spacer is connected in one piece to the support device or is an integral component.
- Induction heating device according to one of Claims 8 to 11, characterized in that the support device (120, 220) comprises at least two support parts (120a, b; 220a, b), where one support part (120a, 220a) is the flat support of the induction coil (133, 213) and the other support part (120b, 220b) carries or is connected to the supply part (130, 230) or a component support (131, 231), where preferably the two parts of the support device are firmly and detachably connected with each other and in particular the first support part (120a, 220a) is substantially disk-like, preferably without projecting lateral edges.
- Induction heating device according to Claim 12, characterized in that the second support part (120b, 220b) has a circumferential lateral edge (121, 221) for forming a dish-like reception space for the supply part (130, 230) or the component support (131, 231), where the lateral edge preferably projects from a disk-like central part.
- Induction heating device according to Claim 12 or 13, characterized in that the supply part (130, 230) or the component support (131, 231) is fastened to the second support part (120b, 220b), where preferably this second support part has spacers (122, 222) for engagement on the component support, which in particular form an integral unit with the second support part (120b, 220b).
- Induction heating device according to one of the preceding claims, characterized in that the supply part (30, 130, 230) has a single component support (31, 131, 231) for the electronic power unit (33, 133, 233) and the electronic control unit (37, 137, 237), where preferably the electronic power unit components are located on that side of the component support facing the induction coil (13, 113, 213) and the component support is arranged at the module end remote from the induction coil.
- Induction heating device according to one of the preceding claims, characterized in that the supply part (30, 130, 230) or an electronic power unit (33, 133, 233) contained therein has a single transistor inverter (34, 134, 234) and forms a parallel resonant circuit with the induction coil (13, 113, 213).
- Induction heating device according to one of the preceding claims, characterized in that the fan device (39, 139, 239) is arranged between the induction coil (13, 113, 213) and the supply part (30, 130, 230) or component support (31, 131, 231) and is preferably provided with, and connected by electrical connections, to the supply part or component support.
- Induction heating device according to one of the preceding claims, characterized in that on a side remote from the induction coil (13, 113, 213), in particular the underside, a suction port (44, 144, 244) is provided for cooling air in the vicinity of the fan device (39, 139, 239), which sucks in cooling air and guides it against the supply part (30, 130, 230) or the electronic power unit (33, 133, 233) or a heat sink (34, 134, 234), while preferably a cooling air circulation is provided which, after the cooling air flow was guided past the electronic power unit, guides the cooling air flow past the electronic control unit (37, 137, 237) and then through a central opening (27, 127, 227) in the support device (20, 120, 220) out of the module through a free central area of the induction coil.
- Induction heating device according to one of the preceding claims, characterized in that it is designed as an autonomous module for connection to a supply voltage (57) which is not regulated with respect to power generation, such as a mains voltage, and for connection to control signals for adjusting the power control or power output level.
- Hob cavity with several hotplates and in each case associated heating devices, where the hob cavity (50) has a support tray (54) into which the heating devices (11, 55) are introduced and fastened, characterized in that at least one heating device is an induction heating device (11) according to one of the preceding claims.
- Hob cavity according to Claim 20, characterized in that it has an operating device (60, 61) with a control for generating operation-dependent control signals, which are passed directly to an induction heating device (11).
- Hob cavity according to Claim 21 or 22, characterized in that it has electromechanical power control devices, which contain a cyclic mechanical switch whose electrical switching signals are passed directly to an induction heating device (11).
- Hob cavity according to one of Claims 20 to 22, characterized in that it has a mains part (57), preferably with a filter with an induction heating device (11) of the hob cavity (50) being connected directly to the mains part.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SI200630537T SI1844630T1 (en) | 2005-01-31 | 2006-01-25 | Induction heating device and ceramic hob cavity comprising said type of induction heating device |
PL06706390T PL1844630T3 (en) | 2005-01-31 | 2006-01-25 | Induction heating device and ceramic hob cavity comprising said type of induction heating device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005005527A DE102005005527A1 (en) | 2005-01-31 | 2005-01-31 | Induction heating device for cooking area of hob tray, has supply part converting applied voltage into power control for induction coil, where device is formed as installation-finished and/or connection-finished component |
PCT/EP2006/000619 WO2006081967A1 (en) | 2005-01-31 | 2006-01-25 | Induction heating device and ceramic hob cavity comprising said type of induction heating device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1844630A1 EP1844630A1 (en) | 2007-10-17 |
EP1844630B1 true EP1844630B1 (en) | 2009-12-09 |
Family
ID=36147349
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06706390A Active EP1844630B1 (en) | 2005-01-31 | 2006-01-25 | Induction heating device and ceramic hob cavity comprising said type of induction heating device |
Country Status (12)
Country | Link |
---|---|
US (1) | US7786414B2 (en) |
EP (1) | EP1844630B1 (en) |
JP (1) | JP4925343B2 (en) |
KR (1) | KR101285910B1 (en) |
CN (1) | CN1943274B (en) |
AT (1) | ATE451818T1 (en) |
DE (2) | DE102005005527A1 (en) |
ES (1) | ES2337922T3 (en) |
HK (1) | HK1101849A1 (en) |
PL (1) | PL1844630T3 (en) |
SI (1) | SI1844630T1 (en) |
WO (1) | WO2006081967A1 (en) |
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KR20210105689A (en) | 2020-02-19 | 2021-08-27 | 엘지전자 주식회사 | Induction heating type cooktop |
KR20210106290A (en) * | 2020-02-20 | 2021-08-30 | 엘지전자 주식회사 | Cooking appliance and method for controlling thereof |
US11871499B2 (en) | 2020-11-05 | 2024-01-09 | Whirlpool Corporation | Induction cooking apparatus with heatsink and method of assembly |
KR20220080380A (en) | 2020-12-07 | 2022-06-14 | 엘지전자 주식회사 | Electric range |
KR20220160925A (en) * | 2021-05-28 | 2022-12-06 | 엘지전자 주식회사 | Electric range |
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JPS57109291A (en) | 1980-12-26 | 1982-07-07 | Matsushita Electric Ind Co Ltd | Induction heating cooking device |
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US4549052A (en) * | 1984-01-12 | 1985-10-22 | The Maytag Company | Cooling system for an induction cooking cartridge |
JPS61105036A (en) * | 1984-10-29 | 1986-05-23 | Matsushita Electric Ind Co Ltd | Burner unit for cooking |
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FR2635852B1 (en) * | 1988-08-29 | 1994-09-16 | Samsung Electronics Co Ltd | ELECTRONIC MODULAR TYPE COOKING APPARATUS |
JPH04245188A (en) * | 1991-01-31 | 1992-09-01 | Matsushita Electric Ind Co Ltd | Induction heating cooker |
JPH0529073A (en) | 1991-07-24 | 1993-02-05 | Matsushita Electric Ind Co Ltd | Induction heating cooker |
DE4224405A1 (en) | 1992-03-14 | 1993-09-16 | Ego Elektro Blanc & Fischer | INDUCTIVE COOKING HEATING |
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DE10163839B4 (en) * | 2001-12-22 | 2005-01-05 | AEG Hausgeräte GmbH | Cooker, in particular induction cooker |
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DE20204249U1 (en) * | 2002-03-16 | 2002-05-29 | Berner Kochsysteme Gmbh & Co K | Induction generator that can be installed in modules |
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KR100644062B1 (en) * | 2004-08-16 | 2006-11-10 | 엘지전자 주식회사 | Inducion heat cooking apparatus |
-
2005
- 2005-01-31 DE DE102005005527A patent/DE102005005527A1/en not_active Withdrawn
-
2006
- 2006-01-25 EP EP06706390A patent/EP1844630B1/en active Active
- 2006-01-25 ES ES06706390T patent/ES2337922T3/en active Active
- 2006-01-25 PL PL06706390T patent/PL1844630T3/en unknown
- 2006-01-25 JP JP2007552564A patent/JP4925343B2/en not_active Expired - Fee Related
- 2006-01-25 WO PCT/EP2006/000619 patent/WO2006081967A1/en active Application Filing
- 2006-01-25 DE DE502006005577T patent/DE502006005577D1/en active Active
- 2006-01-25 CN CN2006800000823A patent/CN1943274B/en active Active
- 2006-01-25 SI SI200630537T patent/SI1844630T1/en unknown
- 2006-01-25 AT AT06706390T patent/ATE451818T1/en not_active IP Right Cessation
- 2006-01-25 KR KR1020077019799A patent/KR101285910B1/en active IP Right Grant
-
2007
- 2007-07-26 US US11/828,751 patent/US7786414B2/en not_active Expired - Fee Related
- 2007-08-24 HK HK07109246.6A patent/HK1101849A1/en not_active IP Right Cessation
Also Published As
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PL1844630T3 (en) | 2010-05-31 |
US7786414B2 (en) | 2010-08-31 |
DE102005005527A1 (en) | 2006-08-03 |
US20070278215A1 (en) | 2007-12-06 |
CN1943274A (en) | 2007-04-04 |
DE502006005577D1 (en) | 2010-01-21 |
KR20070107731A (en) | 2007-11-07 |
ATE451818T1 (en) | 2009-12-15 |
ES2337922T3 (en) | 2010-04-30 |
EP1844630A1 (en) | 2007-10-17 |
JP4925343B2 (en) | 2012-04-25 |
WO2006081967A1 (en) | 2006-08-10 |
HK1101849A1 (en) | 2007-10-26 |
SI1844630T1 (en) | 2010-02-26 |
JP2008528918A (en) | 2008-07-31 |
CN1943274B (en) | 2012-11-14 |
KR101285910B1 (en) | 2013-07-23 |
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