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
  • H05B6/10—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
  • H05B6/1254—Cooking devices induction cooking plates or the like and devices to be used in combination with them with special coil arrangements using conductive pieces to direct the induced magnetic field
• • 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
  • 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
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
  • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

Definitions

• the invention relates to a method for producing an inductor for an induction hob, in which a plate-like support is provided, on which on one side at least one magnetic return element and on the opposite side of a coil are formed. Furthermore, the invention relates to an inductor for an induction hob.
• Induction hobs comprise an inductor which is arranged under a hob plate, which may be formed of glass ceramic, for example. In electromagnetic interaction with the material of the plate set up on the hob cooking vessel introduced in the preparation vessel food is heated and prepared.
• an inductor with a coil carrier comprises at least one receiving space for at least one magnetic return means, wherein this return means is held in the receiving space such that the receiving spaces are closed by a common cover.
• the plurality of return means are arranged as narrow strips in the radial direction of the coil carrier and thus in the vertical direction with respect to the winding of the induction coil, which is helically wound in a plane parallel to the magnetic return means. It is an object of the present invention to provide a method for producing an inductor for an induction hob as well as such an inductor, which can be formed less expensive with regard to the attachment of the components to the carrier.
• a plate-like carrier In a method according to the invention for producing an inductor for an induction hob, first of all a plate-like carrier is provided. At least one magnetic return means or magnetic return element is attached to a first side of this plate-like carrier. On the opposite side of the plate-like support, an inductor coil is attached. This is generated in particular in several windings of a coil wire. In continuous recesses in the plate-like carrier, an adhesive is introduced, and in an adhesive step, the magnetic return element and the coil is adhered to the carrier. By this method, only one bonding step is performed and thereby the two essential components, namely the at least one magnetic return element and the coil, can be adhered to the support. As a result, a considerable amount of time and thus a cost reduction is connected.
• the adhesive introduced into the recesses of the plate-like carrier is pressed partially through the recesses onto the other side of the carrier and pressed over the coil already mounted there.
• a side facing away from the carrier of the coil is also arranged electrically insulating insulator plate bonded to the carrier and / or the coil by means of the overflowed adhesive.
• such an electrically insulating insulator plate is made of a so-called and known mica material.
• the recesses are formed as slots or elongated slots in the plate-like support and extend from the center outwards to the edge of the plate-like support, in particular in an inclined configuration towards the edge.
• a very simple introduction of the adhesive can be made in these recesses and on the other hand a best possible distribution of the adhesive on both sides of the plate-like support are ensured, whereby a particularly effective and efficient attachment of different components on both sides of the plate-like support by only a single gluing step is possible.
• the coil is applied to the carrier by winding a coil wire and held with a holding device prior to the introduction of adhesive into the recesses of the carrier.
• this electrically holding insulating plate is also held in position with this holding device. It is therefore carried out before the introduction of the adhesive already a corresponding positioning of the coil on the carrier in a first intermediate step and beyond a positionally accurate arrangement of the insulator plate to the coil, which is held in position during the manufacturing process by the holding device.
• an undesired positional shift of the coil and the insulator plate can be avoided.
• unwanted leakage or overflow when introducing the adhesive into the recess from the side from which the magnetic return elements are then applied to the carrier is avoided.
• the coil then serves to introduce the adhesive into the Recesses already as a mechanical stop element. Such a sequence of steps is most suitably fast and precise with regard to the introduction of the adhesive and the retention of the adhesive at the desired location until complete bonding of all components to the support.
• the magnetic return element, the coil and an insulator plate are glued to the carrier.
• the at least one magnetic return element is introduced into the intended positions and receptacles in the plate-like support on the side of the plate-like support intended for this purpose and pressed against the support.
• the adhesive introduced beforehand in the recesses is then pushed past the recesses and, in particular, laterally past the coil.
• the recesses are sized and arranged to extend outwardly from the center towards the edge of the plate-like support when the coil is mounted over the outer edge of the coil, an exposed portion remains with the recesses when the coil is mounted which is not covered by the coil.
• the invention relates to an inductor for an induction hob, which has a plate-like carrier, on one side of which at least one magnetic return element and on the opposite side of a coil are arranged.
• the plate-like carrier has one or more continuous recesses, in which an adhesive is applied, with which both the magnetic return element and the coil are adhered to the carrier in a single bonding step.
• the inductor preferably comprises an electrically insulating insulator plate, which is arranged on the side facing away from the carrier of the coil.
• the insulator plate is glued to the adhesive introduced in the recesses by means of the single gluing step on the support.
• the adhesive provided for bonding the insulator plate to the carrier extends laterally past the regions of the recesses which are not covered by the coil, past the coil.
• the inductor is manufactured with a view to securing the magnetic return element, coil and insulator plate with a single adhesive in a single bonding step.
• the plate-like support is made as a one-piece component, in particular made of plastic. This makes it relatively quick and inexpensive to manufacture and is also very easily trained. In addition, an electromagnetic neutral design is possible by this material, so that the electromagnetic interaction between the coil and the magnetic yoke elements is not affected thereby.
• the at least one return element is designed as a ferrite component having at least partially, wherein it is formed in particular as a plate of a ferrite material.
• the return element comprises a plurality of return partial elements. These are oriented in the direction of current flow in the induction coil, whereby the electromagnetic interaction is improved.
• the inductor comprises six return partial elements, which are arranged symmetrically to at least one horizontal axis of symmetry of the inductor.
• the magnetic return element is formed of a plurality of segments or return partial elements, which are arranged substantially to a closed induction coil shape successively in the winding direction of the induction coil and in particular give a total shape corresponding to the induction coil shape in the winding state.
• the winding shape and thus the induction coil shape is corner-free, in particular oval, formed.
• new cooking zone geometries can be formed particularly advantageously, in which case particularly for new preparation vessels, a particularly adapted zone heating in the region of a cooking zone is made possible so that as little energy loss as possible occurs.
• the induction coil shape is a flat ring with a particular oval ring shape, in which case the shape of the at least one magnetic return element is a flat ring.
• a flat ring is understood to mean a shape in which the radial thickness of the ring is not just one line but has a greater width in this regard.
• Fig. 1 is a plan view of a first side of the carrier of an inductor to which magnetic return elements are attached;
• Figure 2 is a plan view of the carrier on a second side, on which the coil is already applied.
• FIG. 3 shows a plan view of the carrier on the side according to FIG. 1 with already introduced magnetic return-circuit elements
• Fig. 4 is a plan view of the illustrations of FIG. 2 with in addition to the
• a plate-like carrier 1 of an inductor 2 for an induction hob is shown in a plan view.
• the plate-like carrier 1 is a one-piece plastic part, which has an oval shape.
• a first side 3 which has a plurality of receivers 4, 5, 6, 7, 8 and 9.
• magnetic return partial elements which are formed in particular of ferrite and plate-like shapes, introduced. They are used for electromagnetic interaction with a mounted on the opposite side of the carrier 1 coil.
• Continuous recesses 10a, 10b, 10c, 10d, 10e, 10f, 10g, 10h, 10i and 10j are furthermore formed in the plate-like carrier 1. As can be seen, they extend from the center in an oblique orientation outwards to the edge of the plate-like carrier 1.
• the inductor 2 first of all this plate-like carrier 1 is provided as shown in FIG.
• a coil 12 is then formed on the second side 11 opposite the first side 3.
• a coil wire is wound in a variety of turns in an oval shape.
• the winding of the coil 12 takes place in such a way that subareas of the recesses in the direction towards the edge of the plate-like carrier 1 extend beyond an edge 13 of the coil 12.
• an electrically insulating insulator plate 14 shown in Fig. 4 which is formed of a mica material beyond is held.
• a top view of this insulator plate 14 is shown. It is arranged on the side facing away from the Republicl of the coil 12 on the spool 12 and covers it completely as shown in FIG. 4.
• this insulator plate between the underside of the cooktop plate and the coil 12 is arranged.
• a silicone adhesive is then introduced into the recesses 10a to 10j in a subsequent method step. This is done from that side 3 of the carrier 1, as shown in the plan view of FIG. 1 and FIG. 3.
• the adhesive is introduced from that side 3 into the recesses 10a to 10j, on which the magnetic return-circuit sub-elements are subsequently introduced.
• the already applied on the opposite side 1 1 coil 12 then serves as a kind of stopper for the introduced into the recesses 10 a to 10 j from the side 3 ago adhesive.
• this magnetic return element 15 is introduced.
• this magnetic return circuit elements 15 is formed of a plurality, in particular six magnetic return partial elements, of which in Fig. 3, only two return partial elements 15a and 15b, which are incorporated in the receptacles 4 and 5 are shown.
• the further four return partial elements are not shown in FIG. 3 and are then introduced into the receptacles 6 to 9 in the carrier 1.
• these return partial elements 15a and 15b are introduced simultaneously or successively into the receptacles 4 and 5 provided for this purpose and pressed against the carrier 1.
• the silicon adhesive introduced into the recesses 10a to 10d is pressed through these recesses 10a to 10d and, in particular, passes over the uncovered partial regions 101a to 101d past the coil 12 and thus passes over the coil 12 so as to form the insulator plate 14 reached.

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• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Coils Or Transformers For Communication (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=44246953

Family Applications (1)

Country Status (2)

Cited By (6)

Citations (4)

• 2010
  • 2010-04-15 ES ES201030546A patent/ES2388393B1/es not_active Expired - Fee Related
• 2011
  • 2011-03-31 WO PCT/IB2011/051380 patent/WO2011128799A1/de active Application Filing

Patent Citations (4)

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