EP2827064A1 - Appareil de cuisson doté d'éléments d'éclairage - Google Patents

Appareil de cuisson doté d'éléments d'éclairage Download PDF

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Publication number
EP2827064A1
EP2827064A1 EP14167301.2A EP14167301A EP2827064A1 EP 2827064 A1 EP2827064 A1 EP 2827064A1 EP 14167301 A EP14167301 A EP 14167301A EP 2827064 A1 EP2827064 A1 EP 2827064A1
Authority
EP
European Patent Office
Prior art keywords
cooking
appliance according
cooking surface
cooking appliance
light
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP14167301.2A
Other languages
German (de)
English (en)
Other versions
EP2827064B1 (fr
Inventor
Martin Taplan
Dr. Thomas Zenker
Gerold Ohl
Dr. Bernd Wölfing
Dr. Ju-Young Uam
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.)
Schott AG
Original Assignee
Schott AG
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
Priority claimed from DE102013110277.8A external-priority patent/DE102013110277B4/de
Application filed by Schott AG filed Critical Schott AG
Priority to EP17203551.1A priority Critical patent/EP3321592A1/fr
Priority to PL14167301T priority patent/PL2827064T3/pl
Publication of EP2827064A1 publication Critical patent/EP2827064A1/fr
Application granted granted Critical
Publication of EP2827064B1 publication Critical patent/EP2827064B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/08—Arrangement or mounting of control or safety devices
    • F24C7/082—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination
    • F24C7/083—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination on tops, hot plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/10—Tops, e.g. hot plates; Rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/10—Tops, e.g. hot plates; Rings
    • F24C15/102—Tops, e.g. hot plates; Rings electrically heated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/10—Tops, e.g. hot plates; Rings
    • F24C15/102—Tops, e.g. hot plates; Rings electrically heated
    • F24C15/105—Constructive details concerning the regulation of the temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/10—Tops, e.g. hot plates; Rings
    • F24C15/108—Mounting of hot plate on worktop
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/06—Arrangement or mounting of electric heating elements
    • F24C7/062—Arrangement or mounting of electric heating elements on stoves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/06—Arrangement or mounting of electric heating elements
    • F24C7/067—Arrangement or mounting of electric heating elements on ranges
    • 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
    • H05B3/00—Ohmic-resistance heating
    • H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates
    • H05B3/74—Non-metallic plates, e.g. vitroceramic, ceramic or glassceramic hobs, also including power or control circuits
    • 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
    • H05B3/00—Ohmic-resistance heating
    • H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates
    • H05B3/74—Non-metallic plates, e.g. vitroceramic, ceramic or glassceramic hobs, also including power or control circuits
    • H05B3/742—Plates having both lamps and resistive heating elements
    • 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
    • H05B3/00—Ohmic-resistance heating
    • H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates
    • H05B3/74—Non-metallic plates, e.g. vitroceramic, ceramic or glassceramic hobs, also including power or control circuits
    • H05B3/746—Protection, e.g. overheat cutoff, hot plate indicator
    • 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

Definitions

  • the invention relates to a cooking appliance with a cooking surface, consisting of a glass or glass ceramic material, wherein in the area below the underside of the cooking surface at least one heating element and at least one light-emitting element are arranged, wherein the heating element by means of a resiliently acting pressing indirectly or directly, for example. Under bias one or more spring elements or spring-acting trusses or mounting plates rests against the underside of the cooking surface.
  • Cooking devices with light elements are known from the prior art, in which the light elements are used to display operating conditions.
  • Induction cooking appliances are usually formed today with a glass ceramic disk as a cooking surface.
  • other materials such as tempered soda-lime glass or borosilicate glass can be used as cooking surface material if thermal overheating of these temperature-sensitive materials can be avoided. All materials, both glass ceramic and soda lime glass or borosilicate glass are brittle materials.
  • constructive measures must be taken to avoid breakage of the cooking surface.
  • a glass or glass ceramic cooking surface can not balance the energy of a falling pot by deformation of the surface, such as a metal surface it could.
  • the energy has to be transmitted to the environment through vibrations. If it is prevented, then the shock load leads to breakage of the cooking surface. For this reason, cooking surfaces are installed in such a way that they can avoid shock loads, for example when a pot falls down on the cooking surface.
  • the heating elements in particular induction coils are resiliently pressed against the underside of the cooking surface, so that they can also give in at the impact load.
  • Lighting elements are used for cooking zone marking or for visualization of operating conditions, such as cooking situations or dangerous situations. To ensure good visibility, the lighting elements should be as close as possible to the bottom of the cooking surface. Then losses due to scattering are kept low and it is possible to achieve a good image sharpness and brightness of the light-emitting elements.
  • the lighting elements themselves can be made of glass or glass ceramic and have the property that the light output along the length of the light element can be defined if necessary. In case of impact load (falling pot) on the cooking surface in this case is now double risk. On the one hand, the cooking surface can strike and break during deflection on the light element. On the other hand, however, the light element can be damaged or both components are unusable by the blow at the same time.
  • a cooking appliance in which a heating element is arranged below the cooking surface.
  • the heating element is supported by a housing.
  • a neck housing is screwed laterally.
  • the attachment housing carries a light source which couples its light into a light element designed as a light guide.
  • the light guide is annular and surrounds the heating element.
  • Another cooking appliance is out of the DE 40 02 322 A1 known.
  • the DE 38 31 233 A1 is used here as a light source an annular light guide. This is embedded in the insulating material of the heating element.
  • Another annular light guide is from the DE 43 35 893 A1 known.
  • This object is achieved in that the one or more lighting elements and that at least one heating element are arranged on a common support portion of the pressing device such that they are adjustable at a deflection and / or vibration of the cooking surface.
  • the lighting element can now be deflected together with the heating element to allow oscillation of the cooking surface. This reduces the risk of breakage of the cooking surface.
  • the light element is protected from damage.
  • the construction of the Cooking appliance can be selected in the invention in particular so that the lighting elements are mounted in a fixed position relative to the heating element.
  • the construction according to the invention is individualized in such a way that at least one spring element acting on the pressing device can be deflected during an adjustment of the luminous element and of the heating element. As a result, damage to the lighting element is excluded by striking the cooking surface.
  • At least one spring element acting on the pressing device can be deflected during an adjustment of the lighting element and of the heating element.
  • the aforementioned rigid association of the luminous element can be used for heating element, whereby the distance of the luminous element to the underside of the cooking surface does not change at impact or bending load.
  • the support portion itself is designed resiliently.
  • the luminous element is spring-biased against the pressing device supported. With the light element relative to the pressing device supporting spring elements and the spring elements which bias the support portion of the pressing, can be carried out on a suitable choice of the spring constant individual vote on the selected cooking surface.
  • the luminous element is arranged at a distance to the underside of the cooking surface, wherein preferably a distance in the range of 0.2 to 10 mm, particularly preferably 0.5 to 5 mm, particularly preferably 0.5 to 2 mm is provided , Due to the spacing and the spring preload of the support section a hitting the cooking surface is reliably prevented on the light-emitting element.
  • the distance range between 0.5 mm to 5 mm guaranteed with simultaneous damage, especially in large-sized colored glass or glass ceramic materials for the cooking surface a sufficiently high light output for visualization of a display on the cooking surface front. For such normal to small cooking surfaces can be gone to a distance range of 0.5 to 2 mm.
  • a distance range of up to 10 mm can be provided if high deflections / displacements are expected, for example, in the case of large formats which are at the same time mounted in a swingable manner.
  • the support portion carries a plurality of heating elements, wherein the heating elements are arranged in at least one row.
  • the design effort for a cooking appliance can be significantly simplified.
  • a plurality of support sections are arranged below the cooking surface, which extend in width or depth directions of the cooking surface.
  • an induction cooking appliance can be constructed, in which the entire cooking surface is acted upon by heating elements in order to be able to carry out a freely selectable positioning of a pot on the cooking surface.
  • the support portion is part of a carrier which receives the at least one heating element and the at least one luminous element, then a uniform assembly is formed, which can be installed with little effort. In the case of maintenance, this module can then also exchange targeted.
  • the carrier is designed like a housing and has at least one laterally molded receptacle for the luminous element.
  • the carrier may also have a different construction, for example be configured disc-shaped.
  • the heating element and the lighting element can be electrified at a common electrical connection of the carrier.
  • a clear and simple contacting of the heating elements is possible.
  • a conceivable variant of the invention is such that the luminous element is arranged between two heating elements.
  • a cooking appliance according to the invention is such that the luminous element has a luminous means and a light guide with at least one light guide section into which the light source couples its light, and the light guide section or a further light guide section coupled to the light guide section has a radiation region over which the light from the light source Illuminant is radiatable toward the bottom of the cooking surface, then specific lighting situations can be generated specifically.
  • the temperature-sensitive lighting means may in particular also be arranged away from the heating elements. With the Lichtleitabitesen can be punctual or surface-shaped luminous phenomena.
  • the at least two light-guiding sections merge into one another in one piece via an angling, then a low part and assembly effort can initially be achieved via the one-piece design.
  • About the Lichtleitabitese spatially difficult to access areas below the cooking surface can be made accessible.
  • the emitting region of the lighting elements may be formed by a convex surface or a flat surface of the light guiding section. Especially over flat surfaces can be produced easily recognizable luminous phenomena, which are so in the state The technique is not previously known.
  • a light-scattering element for example in the form of a roughening, a coating, in particular an organic or ceramic coating, a scattering element, for example a scattering film, a scattering glass or ceramic on the underside of the cooking surface Platelets or a scattered plastic film.
  • the aforementioned coatings can be formed using: sol-gel materials, silicones, silicone resins, epoxy resins, methacrylates, polyurethane.
  • the light-diffusing element may be or may be an intermediate support.
  • indirect carriers are glasses, glass ceramics or films, which in turn may be provided with organic and / or ceramic coatings.
  • the indirect carriers of the light-scattering layer may be either self-adhesive, materially bonded (for example with an adhesive layer) or loosely connected by pressure forces to the underside.
  • the light-scattering element causes a widening of the viewing angle (Comparisons FIGS. 16 and 17 ) and a reduction of the parallax shift, which substantially improves the recognition of this luminous appearance to the user.
  • the following materials can be used as scattering materials: Lexan 8B28 (SABIC Innovative Plastics), Macrofol BL / LT (Bayer), Plexiglas SATINICE ⁇ (Röhm), OPALIKA ⁇ Glass (SCHOTT)
  • At least one of the light guide sections is formed as a surface element.
  • a cooking appliance according to the invention may be such that the mean transmission of the colored cooking surface is> 0.1%, preferably> 0.4%, in each case for at least one, preferably for each of the spectral ranges from 420 to 500 nm, 500 to 550 nm and 550 to 640 nm.
  • sufficiently bright color impressions in the blue to red spectral range can be produced with the luminous elements through the cooking surface on the display side formed by the cooking surface front side.
  • With an average transmission> 0.4% clearly recognizable and sufficiently bright displays can be realized.
  • the maximum transmission of the cooking surface should be defined as ⁇ 50%, preferably ⁇ 25% at 400 nm - 700 nm Transmission should be in the spectral range of 450-600 nm ⁇ 8%, preferably ⁇ 4%. At a maximum transmission ⁇ 25%, the view is also denied from the outside even in the case of light irradiation.
  • an optical compensation filter may be arranged between the upper side of the cooking surface and the luminous element.
  • Such an optical compensation filter shifts the location of the light emitted by the luminous element Leuchterscheinung. When using a colored glass ceramic, the light location is then shifted again when passing through the cooking surface.
  • the optical compensation filter can now be matched to the material of the cooking surface, that ultimately the desired color appearance on the display side of the cooking surface can be generated. In this way, in particular cost-effective lighting elements using, for example, LEDs can be used.
  • optical compensation filter can be used filter films or suitable filter materials can be coated directly on the underside of the cooking surface or arranged directly in front of the light emitting element / LED or be integrated in the light guide or attached to the light guide.
  • the compensation filter In addition, it may also be such that it produces a scattering effect and thus widening of the viewing angle.
  • An inventive cooking appliance can also be such that the cooking surface is provided in the region of its top and / or bottom with a coating.
  • the coating may have functional properties, wherein it prevents, for example, in a transparent or semi-transparent cooking surface, a view of the arranged under the cooking surface internals. Additionally or alternatively, the coating can also be used for optical decoration.
  • the coating can also be provided in particular in the region of the lighting elements with recesses, so that it forms a mask.
  • Cooking surfaces are known from the prior art, which are provided for reasons of strength in the region of its underside with a knob-like or similar structuring.
  • a filling layer of transparent material to be applied to the underside of the cooking surface at least in partial regions of the emitting surface of the lighting elements.
  • the filling layer may consist of a transparent or translucent (for example, also scattering) plastic, for example, silicone.
  • cooking surfaces are used, which are smooth on its underside, so not structured, in particular not knotted.
  • the induction coil may in particular comprise a copper coil including a holder (which is usually made of plastic).
  • the induction coil may also be assigned a temperature sensor or an electrical or optionally thermal insulation.
  • the cooking appliance can also be equipped with a heating element in the form of an electric radiant heater or with a gas burner. Also conceivable are combination devices with different types of heating in one device.
  • the invention can also be applied to grills or warming appliances, which also form cooking appliances within the scope of the invention.
  • the luminous element may consist of a light guide, a light guide holder and a light source.
  • the optical waveguide can be formed from soda-lime glass, borosilicate glass, quartz, glass-ceramic or other transparent, in particular highly transparent types of glass. Such materials are preferred when lighting in the hot area of the cooking surface is to be achieved.
  • transparent or colored plastics such as Plexiglas, salts or fluids as a light guide conceivable.
  • the light feed into the light guide can usually be done by means of LEDs, which are available as commercially available LEDs in the colors white, blue, red and other colors. Furthermore, RGB LEDs can be used to generate any mixed colors.
  • RGB LEDs it may also be provided to use two differently colored LEDs, these LEDs radiating together into the light guide in order to selectively generate a predetermined mixed color. It is also conceivable that differently colored LEDs emit their light from two different locations in the light guide in order to illuminate this in different colors. It is also conceivable to use adapted LEDs, which compensate for a color shift through the colored cooking surface to the effect that the desired color on the cooking surface top is visible. This may be the original color of the LED but also a different color from the original light source. It is also conceivable to set a color filter directly in front of the light source or to design the light element accordingly as a filter. In this case, in particular, the task can be fulfilled, according to which the color shift can be varied, in particular compensated, by the colored cooking surface, whereby, in particular, the original color of the LED is generated again or another color tone is generated selectively.
  • FIG. 1 shows a cooking surface 10, which is preferably formed as a colored glass ceramic. It has an upper side 11 and a lower side 12. In the region of the underside 12, a coating 13 is applied to the cooking surface 10, which prevents inspection of the arranged in the area behind the bottom 12 of the cooking surface components.
  • the coating 13 has partial interruptions 14, which serve as light passages. Thus, the coating 13 forms a mask.
  • the cooking surface 10 is formed of a transparent glass material or a glass ceramic. It can be colored to achieve a corresponding aesthetic appearance. In this case, the coloring can also be chosen such that a view through the glass ceramic is substantially prevented. Then can be dispensed with the back coating 13. In the area behind the bottom 12 of the cooking surface 10 heating elements 20 are arranged. In the FIG.
  • a heating element 20 having an induction coil 21 is shown.
  • the heating element 20 is mounted on a support portion 42 of a pressing device 40.
  • the support portion 42 is supported via spring elements 41 on a housing 50.
  • present the support portion 42 is supported by means of the spring elements 41 relative to a housing bottom 51 of the housing 50.
  • the lighting elements 30 are further mounted.
  • the lighting elements 30 are arranged so that between the bottom 12 of the cooking surface 10 and the light-emitting element 30, a distance range is formed.
  • the distance is selected in the range between 0.2 to 10 mm, preferably in the range of 0.5 to 5 mm, in particular in the range between 0.5 and 2 mm.
  • the lighting elements 30 are positioned so that their emission area 36 is arranged in the region of the interruption 14 of the coating 13. While the left luminous element 30 enters its luminous appearance via the emission area 36 directly into the cooking surface 10, an optical compensation filter and / or an immersion layer 31 is arranged in the right luminous element 30 between the underside 12 of the cooking surface 10 and the luminous element 30. With the optical compensation filter or the immersion layer 31, the luminous appearance of the luminous element 30 can be changed.
  • the cooking surface 10 is glued edge elastically into a frame or glued with mounting brackets, which are screwed to the housing 50, locked or the like. Are connected. The assignment is made such that the cooking surface 10 is resiliently supported relative to the housing 50. Now, if a shock load on the top 11 of the cooking surface 10 acts, the cooking surface will bend and can swing against the housing. In this transient process, the heating element 20, which is pressed against the bottom 13 of the cooking surface 10, deflected. Since the light-emitting elements 30 are positioned fixedly to the heating element 20 on the support portion 42, they swing back together with the heating element 20 against the bias of the springs 41. In this case, the support portion 42 is adjusted against the spring elements 41 in the direction of the housing depth.
  • the support section 42 may itself have a spring action. In this case, the use of additional springs can be dispensed with.
  • FIG. 2 an exemplary embodiment for fixing the luminous element 30 to the support portion 42 is shown.
  • a holder 60 which has a fastening piece 61, which may be formed for example in the form of a printed circuit board.
  • a holding lug 62 is attached at the attachment piece 61.
  • the attachment piece 61 carries a luminous means 33 of the luminous element 30.
  • the attachment piece 61 is equipped with a contact region which holds an electrical contact for the voltage supply of the luminous element 30 in the region of the underside of the support portion 42.
  • the support portion 42 is provided with an opening 43 through which the attachment piece 61 engages.
  • a connection 63 is provided for fixing the holder 60 to the support portion 42.
  • the support portion 42 may consist of a sheet metal.
  • the connection 63 may, for example, be a welding, screwing or gluing, with which the holding lug 62 is connected to the surface of the support section 42.
  • the retaining lug 62 forms a receptacle into which a light guide of the luminous element 30 can be inserted.
  • the light guide on a coupling piece 32 which is inserted into the holding lug 62.
  • a light guide 34 connects.
  • the Lichtleitabites 34 of the luminous element 30 is formed by a rod-shaped material with a circular cross-section.
  • the luminous element 30 may be a glass rod.
  • the light source 33 couples its light into the coupling piece 32 at the end, from where the light enters the region of the light-conducting section 34.
  • the light-emitting element faces in the region facing the underside 13 of the cooking surface 10 30 its emission area 36 on.
  • the light of the luminous means 33 is coupled out of the light guide section 34.
  • the decoupling can be carried out, for example, by means of suitable measures, for example an etching of the surface of the light-conducting section 34. It is also conceivable to provide scattered light structures on the upper side of the light guide section 34. It is also provided to make the light extraction via a scattering reflection layer on the side facing away from the cooking surface underside of the light guide 30.
  • the scattering reflection layer can be generated by a scattering film or roughening of the light guide surface or printing in the desired portion of the light guide.
  • FIG. 3 shows two different variants of a holder 60 for fixing a light-emitting element 30. While the attachment piece 61 of the left holder 60 clearly projects beyond the holding lug 62, a flattening 64 is provided on the attachment piece 61 in the right holder 60, so that the holding lug 62 is preferably flush with the Top of the attachment piece 61 closes or only slightly spaced from the top of the attachment piece 61. With the in FIG. 3 shown right variant of a holder 60, the distance between the bottom 12 of the cooking surface 10 and the lighting element 30 can be reduced in favor of improved light output.
  • FIG. 4 shows a further variant of a holder 60.
  • the holder 60 has again a fastening piece 61 with a connected holding lug 62.
  • the support portion 42 has a fold in the region of the connection 63 to the holding lug 62 can be realized.
  • a light guide of the light-emitting element 30 in the form of a bent glass rod, plastic rod or a rod made of another transparent material is used.
  • the light guide has two light guide sections arranged at an angle to one another 34, 35, which are merged via an arcuate bend 37 into each other in one piece. While in the design variants according to the FIGS.
  • the central longitudinal axis of the coupling piece 32 was aligned horizontally is in the FIG. 4 the longitudinal axis of the coupling piece 32 aligned vertically to the cooking surface plane.
  • the lighting means 33 can be kept below the support portion 42, whereby an additional distance to the heating element and a thermal insulation is achieved. As a result, the service life of the luminous means 33 can be increased.
  • FIG. 5 is in principle a similar structure as in FIG. 4 shown. Unlike the FIG. 4 is now here no rod-shaped light guide used, but a light guide in the form of an angled plate, for example consisting of glass or plastic. Here are again two Lichtleitabitese 34, 35 via an angled portion 37 merged into each other.
  • the light-guiding section 35 forms on its upper side a radiation region 36 in the form of a rectangular or square surface, wherein it too can be structured, depending on the intended scattering or reflection regions.
  • FIG. 6 shows a light guide of a lighting element 30 in the form of a flat plate, which is set with its coupling piece 32 in the holder 60.
  • the plate forms on its upper side a radiation region 36 over which the light coupled in by the light source is emitted.
  • the plate-shaped geometry of the light guide according to FIGS. 5 and 6 is also the holder configured with a correspondingly elongated retaining lug 62.
  • the holding approach is formed by two parallel spaced-apart surface elements, between which the coupling piece 32 is enclosed.
  • a plurality of bulbs are arranged side by side in the direction of the longitudinal extent of the holding lug 62.
  • the bulbs 33 are preferably arranged to each other at the same pitch to achieve a uniform illumination.
  • the equalization of illumination can be improved by attaching a scattering surface on the surface of the light guide facing the light source.
  • the scattering surface can be done by roughening or printing or particularly advantageous by using a special adhesive tape, which is offered by the company 3M as unifomity tape.
  • FIGS. 7a to 7i show various embodiments of rod-shaped optical fibers of a luminous element 30 wherein always two mutually angled Lichtleitabroughe 34, 35 are used, which are connected in one piece via an angled portion 37.
  • FIG. 7a a circular cross-section is selected, which allows the light extraction via scattering or reflection region on the side facing away from the cooking surface of the light guide.
  • FIG. 7b For this purpose, a light guide with a rectangular or square cross section is selected.
  • FIG. 7c shows a similar cross-sectional configuration of the light guide.
  • the bend 37 is chosen so that the Lichtleitabroughe 34, 35 are at a low angle to each other. But they can also be arranged parallel to each other.
  • FIG. 7d is selected a rectangular cross-section for the light guide, wherein the height of the light guide is significantly greater than the width of the light guide.
  • Figure 7e shows an embodiment of a light guide according to FIG.
  • Figure 7f shows a similar embodiment of a light guide as FIG. 7c only with a round bar cross section.
  • FIG. 7g shows a variant of a cylindrical light guide.
  • FIG. 7h shows a light guide similar to FIG. 7d is designed, but has a lower height.
  • 7i shows a light guide with a curved course.
  • FIG. 7l and 7m show light guide of a luminous element 30 analogous to the embodiment according to FIG. 5 , These illustrations illustrate that in order to vary the geometry of the emission surface, both the extension of the light guide in depth and in width directions can vary.
  • FIGS. 7n to 7p optical fibers of a luminous element 30 are disclosed in which a plurality of Lichtleitabroughe 34, 35, 38 and 39 are integrally connected to each other.
  • Figure 7n a bow-shaped geometry of the light guide, which is formed by a round rod.
  • FIG. 7o shows a bow-shaped geometry having a rectangular cross-section.
  • 7p shows an optical waveguide design in which a further light-conducting section 39 terminates in the middle region between the two light-guiding sections 34 and 38.
  • Illuminants 33 can be provided at the free end regions of the light-conducting sections 34, 38 and 39 in order to couple their light into the light guide.
  • FIG. 7q shows again, much like FIG. 5 , a plate-shaped light guide, wherein the Lichtleitabites 35 has at its free end a concave geometry 30.1 to visualize an arcuate geometry, for example, the end portion of a heating element 20 can.
  • FIG. 7r shows a light guide which is formed by a plate-shaped blank and two leg-like Lichtleitabitese 34 and 38 which pass over bends 37 in the Lichtleitabites 35.
  • the light-guiding section 35 forms a large-area radiating surface 36.
  • Figure 7s discloses a light guide having two plate-like Lichtleitabitese 34, 35, which merge via a bend 37 into each other.
  • the Lichtleitabroughe 34, 35 are employed at a slight angle to each other or preferably arranged parallel to each other.
  • Figure 7t discloses a similar variant as FIG. 7r However, wherein a smaller width of the Lichtleitabiteses 35 is selected so that a correspondingly narrower radiating surface 36 results.
  • Figure 7u shows an embodiment of a light guide of the plate-like Lichtleitabroughe 34, 35 and 38, which merge via the bends 37 into each other.
  • the Lichtleitabroughe 34, 38 are aligned parallel to each other.
  • the light-guiding section 35 is provided with an opening 30.2, which preferably has a circular configuration in accordance with the geometry of the heating element 20.
  • the breakthrough 30.2 is limited by the geometry edge 30.1.
  • the radiation areas 36 are preferably arranged parallel to the bottom 12 of the cooking surface 10.
  • the radiating surfaces 36 may also be at an angle to the bottom 12 of the cooking surface 10.
  • FIG. 8 discloses an embodiment of a luminous element 30 with a two-part form of the light guide.
  • an optical waveguide element in angular geometry is formed in one piece by the two light-conducting sections 34 and 35 or the angled section 37.
  • the light guide section 34 is accordingly, for example FIG. 2 attached to a holder 60.
  • the light guide section 35 is now inserted in a holder 70.
  • the holder 70 carries a light guide section 38 designed as a rod profile.
  • the light guide sections 35 and 38 are positioned in the holder 70 so that the light from the light element 33 coming from the light guide section 35 can be coupled into the light guide section 38.
  • FIGS. 9a to 9e different embodiments of the invention are shown.
  • a circular heating element 22 is symbolized in these representations, to which the emission areas 36 of lighting elements 30 are assigned.
  • FIG. 9a indicates using the light guides FIG. 7i four arcuate radiating regions 36, which surround the heating element 20.
  • FIG. 9b also shows using the light guides FIG. 7i two arcuate radiating regions 36 which surround the heating element 20.
  • FIG. 9c shows four line-shaped radiating regions 36, which surround the heating element 20, wherein the optical fibers according to FIG. 7k be used.
  • FIG. 9d shows four punctiform radiating regions 36 of bulbs 33 according to the use of the light guide according to FIG. 7g are designed.
  • a radiation region 36 is shown which can be designed using the light guide according to FIG. 7u.
  • FIGS. 10a to 10c illustrate that on a support portion 42 a plurality of heating elements 20 may be installed.
  • the support section 42 may be assigned to different emission areas 36 in order to either optically mark the boundary of the support section 42 and / or to optically delimit individual heating elements 20.
  • FIG. 10a shows not only in plan view circular heating elements 20, but also any other geometries of heating elements 20, for example, oval heating elements 20 can be used.
  • FIG. 10c shows that on a support portion 42 a plurality of rows of heating elements 20 may be installed.
  • FIG. 10d shows the rectangular shape of a mounted on a support portion 42 heating element 20.
  • Bei FIG. 10a be optical fiber according to FIG. 7h or 7e , at FIG. 10b according to FIG. 7k or FIG.
  • FIG. 10c according to FIG. 7k or FIG. 2 and at FIG. 10c according to Figure 7m used.
  • FIG. 10e a light guide in which a plurality of openings 30.2 can be introduced into the light guide 35.
  • FIG. 11 shows a cooking appliance for a surface induction application, wherein a plurality of induction coils 21 of heating elements 20 are mounted on a support portion 42.
  • FIG. 12 shows, between the induction coil 21 lighting elements with optical fibers according to FIG. 7g be arranged.
  • FIG. 13 also a linear marking of the induction coils 21 with light sources, comprising light guides, for example according to the Figures 7j and 7k be used.
  • FIG. 14 shows a disc-like carrier 22. This takes, like the Figures 14a and 14b show, an induction coil 21 on. On the carrier 22 projections are formed, which form receptacles 23. In the receptacles 23 bulbs 33 are used, which have a radiating surface 36 directly to form a light-emitting element 36 and, for example, can be designed as LEDs (see FIG. 14b ). Alternatively, the lighting elements 30 according to Figure 14a also a light guide, for example according to FIG. 7g have, in which case in the receptacle 23, a lighting means 33, for example an LED is installed.
  • the carrier 22 may form the support portion 42, on which the spring elements 41 are supported.
  • a plurality of carriers 22 are installed together with their heating elements 20 on a support portion 42, which is then supported in turn by spring elements 41.
  • the carriers 22 are arranged in rows for a vibration-optimized design, wherein particularly preferably the carrier 22 of a row are mounted on a respective common support portion 42 in the form of, for example, a traverse.
  • FIG. 15 symbolizes such a row-shaped arrangement of the carrier 22 and thus the heating elements 20. Accordingly, could at FIG. 15 three (or more) side by side arranged support portions 42 are used, which are then respectively connected to the housing 50 of the cooking appliance.
  • FIGS. 15 and 14 show the images 23 and the lighting elements 30 at the same angular distance ⁇ arranged distributed to each other over the circumference of the carrier 22.
  • three receptacles 23 are provided, which are arranged offset from each other by 120 °. This way you can, like FIG. 15 shows, achieve a compact assignment of the individual heating elements 20 to each other and it is a uniform illumination of the intermediate regions between the carriers 22 allows.
  • FIG. 16 and 17 show the cooking appliance according to Fig. 1 in a modified embodiment, wherein for improving the luminous appearance on the underside 12 of the cooking surface 19, a light-scattering element 70, in particular a light-scattering plane in the form of a roughening, organic or ceramic coating, a scattering film, a scattering glass or ceramic plate or a scattering plastic film can be appropriate.
  • the indirect carriers of the light-diffusing layer can either be bonded to the underside 12 with an adhesive layer or self-adhesively or loosely via pressure forces.
  • the light-scattering plane causes a widening of the viewing angle ⁇ 1, ⁇ 2 and a reduction of the parallax shift whereby the recognition of this luminous appearance to the user B is substantially improved.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Induction Heating Cooking Devices (AREA)
  • Electric Stoves And Ranges (AREA)
EP14167301.2A 2013-07-16 2014-05-07 Appareil de cuisson doté d'éléments d'éclairage Active EP2827064B1 (fr)

Priority Applications (2)

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EP17203551.1A EP3321592A1 (fr) 2013-07-16 2014-05-07 Appareil de cuisson doté d'éléments d'éclairage
PL14167301T PL2827064T3 (pl) 2013-07-16 2014-05-07 Urządzenie do gotowania z elementami świetlnymi

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DE102013107523 2013-07-16
DE102013110277.8A DE102013110277B4 (de) 2013-07-16 2013-09-18 Kochgerät mit Lichtelementen

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EP17203551.1A Division-Into EP3321592A1 (fr) 2013-07-16 2014-05-07 Appareil de cuisson doté d'éléments d'éclairage

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EP3395124A1 (fr) * 2015-12-25 2018-10-31 Arçelik Anonim Sirketi Plaque à induction comprenant une source lumineuse
CN105744665B (zh) * 2016-03-28 2019-01-25 邢昱 振动式电磁炉
KR102493915B1 (ko) * 2016-06-03 2023-02-01 삼성전자주식회사 오븐
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JP6621976B2 (ja) 2019-12-18
JP2015023028A (ja) 2015-02-02
US20150021312A1 (en) 2015-01-22
EP3321592A1 (fr) 2018-05-16
PL2827064T3 (pl) 2021-11-22
US10228146B2 (en) 2019-03-12
CN110500622A (zh) 2019-11-26
EP2827064B1 (fr) 2021-06-02
ES2880299T3 (es) 2021-11-24

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