EP3484243A1 - Plaque de cuisson à induction - Google Patents

Plaque de cuisson à induction Download PDF

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Publication number
EP3484243A1
EP3484243A1 EP17200848.4A EP17200848A EP3484243A1 EP 3484243 A1 EP3484243 A1 EP 3484243A1 EP 17200848 A EP17200848 A EP 17200848A EP 3484243 A1 EP3484243 A1 EP 3484243A1
Authority
EP
European Patent Office
Prior art keywords
cooking surface
cooktop
support element
support
container
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.)
Withdrawn
Application number
EP17200848.4A
Other languages
German (de)
English (en)
Inventor
Fabrizio Crisà
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Elica SpA
Original Assignee
Elica SpA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Elica SpA filed Critical Elica SpA
Priority to EP17200848.4A priority Critical patent/EP3484243A1/fr
Publication of EP3484243A1 publication Critical patent/EP3484243A1/fr
Withdrawn legal-status Critical Current

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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

Definitions

  • the present invention relates to an induction cooktop, according to the preamble of claim 1.
  • such induction cooktop is used in cookers of homes and more generally, in any place where it is necessary to cook foods.
  • the induction cooktop according to the invention may be provided as a separate domestic appliance or optionally, it may be integrated in a work surface of a modular cooker.
  • induction cooktops are known in the background art.
  • the most common type comprises different induction elements, each comprising a coil capable of causing an electromagnetic field of variable intensity.
  • a ferromagnetic container is placed over such coil. Thereby electric currents are introduced directly into container, thus heating the contents thereof with a much greater efficiency with respect to a resistive-plate cooker and/or a cooker with traditional burners.
  • the induction cooktop comprises an upper panel overlapping the induction element.
  • Such upper panel is capable of supporting the container and preferably is thermally insulating so as to counter the dispersion of heat from the bottom of the container.
  • such panel usually is made of glass.
  • cooktops having panels made of materials other than glass have been made, such as for example wood, granite, marble or other technical materials usually used for making the so-called “tops” of cookers.
  • Cooktops made of materials other than glass are known in the background art as a partial solution to this problem.
  • Such cooktops comprise an upper panel which has a discontinuity close to the induction elements or with respect to the rest of the "top” of the cooker.
  • the cooking surface in the first case is not defined by a single upper panel, but rather by a plurality of separate panels.
  • the upper panel has holes over the induction coils. Such holes are each covered by a respective panel which is shaped like the perimeter of the inductor (usually circular) made of the same material as the upper panel.
  • one panel covers the inductors but it is separate from the rest of the "top" of the cooker.
  • the panel that covers the inductors for both the embodiments are separated by means of a gap, which allows the panel to expand when it is heated by the container during the cooking, so as to avoid cracks or breaks.
  • This type of cooktop has significant disadvantages.
  • the technical task at the basis of the present invention is to propose an induction cooktop which overcomes the above-mentioned drawbacks of the known technique.
  • an induction cooktop according to one embodiment of the present invention comprises at least one induction element.
  • Such induction element is configured to cause an electric current in a container provided for cooking food.
  • the cooktop further comprises a panel overlapping the induction element.
  • the panel defines a cooking surface which, as described below, is one with the top, that is there are no discontinuities or gaps between the cooking surface and the rest of the top of the cooker.
  • the panel is also configured to support the container.
  • the cooktop comprises at least one support element fastened to the cooking surface.
  • the support element projects from the cooking surface.
  • the support element is configured to support the container close to the cooking surface and at the same time, to avoid the direct contact between the container and the cooking surface.
  • the cooktop proposed resolves the technical problem because by providing the direct contact between the hot container and the cooking surface, the heat exchange with the surface itself is greatly limited.
  • the panel is therefore subjected to much smaller thermal stresses with respect to conventional cooktops and therefore may be made of any material without there being a need to introduce discontinuity.
  • 1 indicates an induction cooktop according to the present invention.
  • the cooktop 1 comprises at least one induction element 2, which is configured to induce an electric current in a container (not illustrated) provided for cooking foods.
  • Such induction element 2 which is diagrammatically depicted with a dotted line in Figure 1 , is in itself known to the expert in the field, and therefore is not described in detail.
  • the cooktop 1 comprises a plurality of induction elements 2.
  • the number of induction elements 2 in the cooktop 1 is variable according to the model.
  • a typical cooktop 1 may comprise four induction elements 2, arranged at the vertexes of a rectangle or of a square.
  • the cooktop 1 further comprises a panel 4 which is at least partly, preferably completely, overlapping the induction element 2.
  • Such panel 4 defines a cooking surface 5 and is configured to support the container.
  • such panel 4 is substantially flat.
  • the panel 4 may be made of different types of materials among which there are comprised, by mere way of example, marble, wood or ceramic or composite materials or combinations of several of the aforesaid materials or of technical materials of which the tops of cookers are made.
  • the panel 4 generally is not made of glass.
  • the cooking surface 5 does not have discontinuities or gaps, that is to say it does not have interruptions or openings that may make it permeable to possible liquids.
  • the panel 4, and therefore the cooking surface 5 forms the "top" of the cooker without there being any discontinuities between the area dedicated to cooking the dish and the other areas of such "top".
  • discontinuity means an interruption of the cooking surface 5 which extends inwards, interrupting the continuity with the remaining portion of the panel 4.
  • the cooking surface 5 of the panel 4 may however have variations in height (that is along the vertical which preferably is perpendicular with respect to the treading plane), also sudden variations, as is better illustrated in a successive section of the present description.
  • the cooktop 1 comprises at least one support element 6 fastened to the cooking surface 5.
  • Such support element 6 projects from the cooking surface 5, and in particular is provided to support the container close to the cooking surface 5 so as to avoid the direct contact between the container and the cooking surface 5.
  • the container is in direct contact exclusively with the support element 6, that is the bottom of the container does not come into contact with the cooking surface 5, thus leaving a gap between the bottom of the container and the cooking surface 5.
  • Such an arrangement is particularly advantageous during the cooking of food because the heat of the container caused by the inductors does not propagate, if not marginally, to the panel 4 by conduction, rather it is removed by convection by the air in the gap formed by the spacers 6.
  • the support element 6 develops, projecting outwards, from the cooking surface 5 for a height (that is along the vertical which preferably is perpendicular with respect to the treading plane) such as to allow an adequate removal of the heat from the container.
  • a height that is along the vertical which preferably is perpendicular with respect to the treading plane
  • such height is comprised between 10-12 mm, preferably is comprised between 6-7 mm.
  • the support element 6 is fastened to the cooking surface 5 in a non-removable manner, that is it cannot be removed or moved from its original position.
  • the support element 6 defines a sufficient contact area for stably supporting the container during the cooking of the foods.
  • the material of which the support 6 is made is a plastic material capable of resisting high temperatures and which does not modify the structure thereof (for example, rigidity, colour, thermal insulation) in the whole lifecycle of the induction surface 1.
  • the material of which the support 6 is made is a different material from the one of which the support 4 is made.
  • a material is silicone, PBT, PA66 or PBS, but also wood, glass or granite, marble and the like.
  • the material of which such support 6 is made is the same material as the one of which the support 4 is made. Therefore, if the support 4 is made of wood, then the support element 6 is too.
  • the cooktop 1 may comprise a plurality of support elements 6.
  • each induction element 2 there may be four support elements 6 for each induction element 2.
  • Such elements have a rectangular or bar shape and are arranged in a cross at each induction element 2.
  • the support elements 6 may have different shapes and sizes from one another.
  • the device 1 also comprises fastening means 7. Such fastening means 7 are active between the cooking surface 5 and the support element 6.
  • the fastening means 7 may comprise an adhesive, preferably silicone-based glue.
  • the panel 4 has at least one recess 8.
  • Such recess 8 is counter-shaped to the support element 6 in such a manner as to stably house the support element 6 therein.
  • the support element 6 projects from the cooking surface 5, whereby here the total height of the support element 6 is obtained by adding the height with respect to the surface 5, to the depth of the recess 8.
  • Such mask 9 has at least one opening 10 counter-shaped to the support element 6 to be installed.
  • Such opening 10 is positioned on the cooking surface 5 substantially at one of the induction elements 2 so that it is possible to fasten the support element 6 in a predetermined position with respect to the induction element 2 by simply fastening it on the surface 5 that remains visible through the openings 10 after the mask 9 is positioned.
  • the number of openings 10 on the mask 9 is equal to the number of support elements 6 to be fastened on the panel 4.
  • shape of the openings 10 corresponds to the one of the support elements 6 to be installed.
  • the support element 6 is in any case a separate element from the cooking surface 5.
  • the support element 6 may be made integral with the cooking surface 5.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Cookers (AREA)
EP17200848.4A 2017-11-09 2017-11-09 Plaque de cuisson à induction Withdrawn EP3484243A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17200848.4A EP3484243A1 (fr) 2017-11-09 2017-11-09 Plaque de cuisson à induction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17200848.4A EP3484243A1 (fr) 2017-11-09 2017-11-09 Plaque de cuisson à induction

Publications (1)

Publication Number Publication Date
EP3484243A1 true EP3484243A1 (fr) 2019-05-15

Family

ID=60629393

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17200848.4A Withdrawn EP3484243A1 (fr) 2017-11-09 2017-11-09 Plaque de cuisson à induction

Country Status (1)

Country Link
EP (1) EP3484243A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009143199A1 (fr) * 2008-05-20 2009-11-26 Kenyon International, Inc. Appareil à table de cuisson par induction
US20120111854A1 (en) * 2009-07-17 2012-05-10 Jean-Yves Gaspard Device for induction heating
ES2402960A1 (es) * 2013-01-08 2013-05-10 Juan Lloveras Calvo Sistema de cocinado por inducción y recipiente necesario para dicho sistema
US20140124501A1 (en) * 2012-11-07 2014-05-08 General Electric Company Induction cooktop appliance

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009143199A1 (fr) * 2008-05-20 2009-11-26 Kenyon International, Inc. Appareil à table de cuisson par induction
US20120111854A1 (en) * 2009-07-17 2012-05-10 Jean-Yves Gaspard Device for induction heating
US20140124501A1 (en) * 2012-11-07 2014-05-08 General Electric Company Induction cooktop appliance
ES2402960A1 (es) * 2013-01-08 2013-05-10 Juan Lloveras Calvo Sistema de cocinado por inducción y recipiente necesario para dicho sistema

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