EP0229928A2 - Elément de chauffage pour appareils de chauffage notamment pour cuisinières - Google Patents

Elément de chauffage pour appareils de chauffage notamment pour cuisinières Download PDF

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Publication number
EP0229928A2
EP0229928A2 EP86116386A EP86116386A EP0229928A2 EP 0229928 A2 EP0229928 A2 EP 0229928A2 EP 86116386 A EP86116386 A EP 86116386A EP 86116386 A EP86116386 A EP 86116386A EP 0229928 A2 EP0229928 A2 EP 0229928A2
Authority
EP
European Patent Office
Prior art keywords
heating
heating element
element according
support
surface support
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
EP86116386A
Other languages
German (de)
English (en)
Other versions
EP0229928A3 (en
EP0229928B1 (fr
Inventor
Julius Dipl.-Ing. Husslein
Günther Wittauer
Heinz Kotsch
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.)
BSH Hausgeraete GmbH
Original Assignee
Bosch Siemens Hausgerate GmbH
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 Bosch Siemens Hausgerate GmbH filed Critical Bosch Siemens Hausgerate GmbH
Publication of EP0229928A2 publication Critical patent/EP0229928A2/fr
Publication of EP0229928A3 publication Critical patent/EP0229928A3/de
Application granted granted Critical
Publication of EP0229928B1 publication Critical patent/EP0229928B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H05B3/00—Ohmic-resistance heating
    • H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates
    • H05B3/72—Plates of sheet metal

Definitions

  • the invention relates to a heating element according to the preamble of claim 1.
  • a heating conductor in the form of a coiled heating wire is arranged in a carrier body on an insulating layer. It is also known to provide several such heating resistors with which by means of a so-called seven-stroke switch known per se Different heating outputs can be set in parallel or in series. Such heating elements are relatively complex in terms of construction and production technology and in particular require a considerable overall height of the heating element. In the case of heating elements for other applications, it is known to design the heating conductor (s) in the so-called thick-film paste technique using thick-film pastes and dielectric material which serves as an insulation and carrier layer and to which the thick-film pastes are applied, for example burned in, to create heating conductor tracks.
  • the invention has for its object to design a heating element of the type mentioned in the preamble of claim 1 so that in addition to a simple construction and method of manufacture and a low overall height, there is a very good heating effect.
  • the heating element according to the invention special precautions are taken to ensure that the heat flow resistance between the very flat heating conductor tracks, in particular the thick-film heating conductor tracks, and the surface to be heated is very low. In addition, it is ensured that the best possible coupling of the heating element to the surface to be heated, e.g. to a hob made of stainless steel or glass ceramic or directly to the bottom of the saucepan. Of course, there are similar advantages when using such a heating element for other thermal household appliances, such as for hot plates, but also for dishwashers or washing machines or the like.
  • the support element is provided on both sides with an insulating enamel layer, on which e.g. the heating conductor track or heating conductor tracks are applied directly, e.g. by printing and then baking.
  • This double-sided coating e.g. Enamelling, one avoids one-sided bending of the metallic element due to unsymmetrical thermal stresses when the metallic supporting element is strongly heated.
  • a one-sided surface coating or enamelling is sufficient, namely where the heating conductor tracks are applied.
  • the metal plate consists of a low-carbon and therefore enamel-capable material.
  • the invention provides the possibility of applying the heating conductor tracks directly to a hob plate of a hob with the insulating layer interposed. It is advantageous here if agents, e.g. Thermal barriers are provided to prevent the heat from spreading outside the cooking surfaces. Such heat barriers can be designed in the form of material constrictions or material breakthroughs.
  • an aluminum plate is used as a heating surface support according to claim 7.
  • a stiffening aluminum body of small thermal mass is provided.
  • Such a heating surface support made of aluminum or a similar relatively soft material opens up the possibility of connecting such a heating element by simple pressure welding or friction welding with another metallic and stable support element, for example made of steel, it being possible for the aluminum surface to be provided with rubbing ribs o . Like. is provided.
  • a reflector reflecting heat rays is attached to the underside of the heating surface support or support element.
  • a reflector can be designed as a separate part which is arranged directly on the lower cover layer of the heating element or at a distance therefrom. But there is also the possibility, e.g. enamel a metal layer on the lower cover layer or provide this cover layer with a metal oxide layer.
  • the embodiment according to FIGS. 1 and 3 is a circular hotplate heating element which can be used directly or indirectly, for example in connection with a trough plate or glass ceramic plate, as hotplate heating.
  • It has as carrier 1 a flat, smooth steel plate made of a scale-resistant material up to approx. 700 ° C., which is preferably provided with enamel coatings 2 and 3 on both sides.
  • This metallic carrier 1 is provided with a protective conductor connection, not shown.
  • a thick-film heating conductor track 4 is applied to the underside of the carrier 1 on the egg-layer 3, for example by baking, in the geometric arrangement explained below.
  • This cover layer 5 for example glass layer, has a relatively high dielectric strength at 1250 V.
  • a fastening bolt 7 is provided, which extends through and extends above the aforementioned layers and is welded to the carrier 1.
  • This fastening bolt 7 is used for the mechanical fastening of the hotplate heating element, for example in a hob of the type mentioned at the beginning.
  • the hotplate surface 8 is divided into two heating zones, namely into an outer heating zone 9 and into an inner heating zone 10 and into an innermost one unheated zone 11 and an outermost unheated peripheral zone 12.
  • the radial width of zones 9, 10 and 11 corresponds in each case to approximately one third of the radial width of the hotplate surface 8.
  • the heating conductor track 4 has 11 connection or contact surfaces 13 in the innermost unheated zone and within that inner heating zone 10 and within the outer heating zone 9 altogether annular sections 14 and 15, which are arranged concentrically to each other and in which the heating conductor 4 runs in a meandering manner.
  • the gaps 16 between the meandering turns of section 15 are smaller than the gaps 17 between the meandering turns of section 14, while the cross section of all Ab cuts is always the same size. In this way, the heating effect of the outer section 15 (specific heating surface load) is greater than that of the inner section 14.
  • the two sections 14 and 15 are in electrical connection with one another via connecting sections 18.
  • an electrical measuring resistor track 19 is also applied as a thick-film heating conductor track on the carrier 1 with electrical connection or contact surfaces 20 in the innermost unheated zone 11.
  • this measuring resistor track which consists, for example, of pure nickel and preferably a measuring resistor of 300 up to 550 ohms, the temperature of the outer section 15 of the heating conductor track 4 is sensed, whereby this measuring resistor track 19 can be applied to a predetermined measuring voltage and through the changing resistance at different temperatures different currents are obtained which can be used to control or regulate the heating power .
  • this measuring resistor track 19 of creating an overtemperature protection which ensures that the thermal heating surface load does not exceed a predetermined critical temperature.
  • Tungsten or platinum or a corresponding alloy can be used as material for the heating conductor track 4, which is scale-resistant in the order of magnitude up to 800 ° C.
  • the heating conductor track is designed such that it is approximately 9.7 W / qcm with a diameter of the surface 8 of approximately 145 mm.
  • a slightly thicker aluminum layer 31 is arranged between two steel plates 30. At least the lower steel plate 30 is provided with an enamel layer at 32. Heating conductor tracks 4 are printed and burned onto this enamel layer 32.
  • a lower corner layer 33 can in turn consist of an enamel layer or of glass enamel hen.
  • a reflector 34 is applied to the underside of this cover layer 33 with or without a gap.
  • a steel plate 30 is provided on both sides with enamel layers 32.
  • the heating conductor tracks 4 are applied to the lower of these enamel layers and are in turn covered by an enamel or glass enamel layer. This symmetrical coating of the steel or sheet metal plate 30 prevents warping of the steel plate 30 in the event of excessive heating, i.e. when operating the heating element.
  • FIG. 5 shows a hotplate, for example in the form of a cast hotplate 35, which can be fastened in a known manner on a trough plate, for example made of sheet metal or glass ceramic or glass.
  • a trough plate for example made of sheet metal or glass ceramic or glass.
  • the base surface 38 is provided with an enamel layer. It is advantageous here if a low-carbon material is used for the cast-iron hotplate 35 in order to facilitate the enamelling process.
  • a heating element 37 of the type described above directly to the floor surface 38 without an enamel layer, for example by gluing it or jamming it in a manner not shown.
  • heating element for example according to FIG. 6 with an aluminum surface
  • it can be connected to the metallic material of the cast-iron hotplate 35 by friction welding.
  • a heating element shown in FIG. 6 can preferably be used here.
  • an electrically insulating layer 40, z. 8. made of ceramic, Teflon, enamel or anodized, which in turn carries the heating tracks 4.
  • an aluminum body is used, which is designed in the form of a rib body, ie its lower surface is provided with recesses 43 and in this way has a very small thermal mass.
  • Self Ver in all of these embodiments there is still the possibility of installing a reflector on the underside in the manner described. As in the previous exemplary embodiments, this is also a sandwich-like structural unit that is stable in itself.
  • a heating element 37 of the type described above is to be attached to the underside of a glass ceramic plate 44.
  • a good heat-conducting intermediate layer 45 e.g. as aluminum, to which the heating element 37 is first applied.
  • a sheet metal material e.g. made of stainless steel plate plate 46 of a hob.
  • this trough plate 46 has an indentation 47 with a bottom 48 which is recessed downwards.
  • a heating element 37 ' is inserted into this indentation 47, the e.g. the top heating surface support is drawn approximately in the form of a steel or aluminum plate with the edges 49 down and is supported on the floor 48.
  • a covering plate 50 which in turn is flush with the plane of the trough plate 46, is placed or connected to the heating element 37 'over a large area. consist of glass or glass ceramic material.
  • the shape 48 stabilizes the heating element 37 ', wherein a reflector and / or a thermal insulation material can in turn be arranged in the space between the heating element 37' and the base 48.
  • a trough plate 46 ' is indicated with an opening 51.
  • a heating element 37'' is arranged at the level of this opening 51 or is immersed in it, which in turn is provided with heating conductor tracks 4 and with a heating surface support 52.
  • Connected to the top of the heating surface support 52 is a support element 53, the edge zone 53 'of which is bent downwards at an angle and is practically linear on the troughs plate 46 'supports.
  • the heating element 37 ′′ has an inner annular heating zone with an annular heating conductor track 4 ′ and separated from this is an outer heating zone with a likewise ring-shaped heating conductor track 4 ".
  • This is a so-called zone heating, the heating conductor tracks being switchable together or separately.
  • the heat energy when the inner heating zone, ie the heating conductor track 4 ', is operated solely on the associated heating zone To concentrate and limit the ring area, a heat flow barrier is provided around the inner heating zone in the form of an annular groove 54. This narrowing of the material creates an intermediate zone of increased heat flow resistance.

Landscapes

  • Surface Heating Bodies (AREA)
  • Resistance Heating (AREA)
  • Electric Stoves And Ranges (AREA)
EP86116386A 1985-12-20 1986-11-25 Elément de chauffage pour appareils de chauffage notamment pour cuisinières Expired - Lifetime EP0229928B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3545442 1985-12-20
DE19853545442 DE3545442A1 (de) 1985-12-20 1985-12-20 Heizelement fuer thermische hausgeraete, insbesondere fuer kochstellen

Publications (3)

Publication Number Publication Date
EP0229928A2 true EP0229928A2 (fr) 1987-07-29
EP0229928A3 EP0229928A3 (en) 1988-03-09
EP0229928B1 EP0229928B1 (fr) 1992-06-17

Family

ID=6289167

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86116386A Expired - Lifetime EP0229928B1 (fr) 1985-12-20 1986-11-25 Elément de chauffage pour appareils de chauffage notamment pour cuisinières

Country Status (3)

Country Link
US (1) US4843218A (fr)
EP (1) EP0229928B1 (fr)
DE (2) DE3545442A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0324086A1 (fr) * 1988-01-13 1989-07-19 Fritz Eichenauer GmbH & Co. KG Dispositif de chauffage, en particulier comme plaque de cuisson
DE8909020U1 (de) * 1988-04-15 1989-12-14 Bayer Ag, 5090 Leverkusen Flächenheizelement
DE4109569A1 (de) * 1991-03-22 1992-09-24 Buchtal Gmbh Elektrische heizplatte
EP0481162A3 (en) * 1990-10-15 1992-12-09 Lancet S.A. Domestic cooking apparatus
DE4341035A1 (de) * 1993-12-02 1995-06-08 Ego Elektro Blanc & Fischer Beheizung mit einer Heizeinheit
EP0695914A1 (fr) * 1994-08-04 1996-02-07 Sollac S.A. Elément de cuisson encastrable extra-plat
DE19638640A1 (de) * 1996-09-21 1998-04-02 Ako Werke Gmbh & Co Strahlungsheizkörper mit einem Metallfolien-Heizleiter
DE102011003464A1 (de) 2011-02-01 2012-04-26 E.G.O. Elektro-Gerätebau GmbH Heizeinrichtung für eine Pumpe und Pumpe
EP2481931A2 (fr) 2011-02-01 2012-08-01 E.G.O. Elektro-Gerätebau GmbH Dispositif de chauffage pour une pompe et pompe
EP1177708B2 (fr) † 1999-05-04 2012-12-12 Otter Controls Limited Ameliorations apportees a des elements chauffants, notamment dans le domaine des elements chauffants en couche epaisse

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DE3723016A1 (de) * 1987-07-11 1989-01-19 Krups Stiftung Elektrisch betriebenes geraet zum zubereiten von heissgetraenken, wie kaffee, tee od. dgl.
DE3728466A1 (de) * 1987-08-26 1989-03-09 Ego Elektro Blanc & Fischer Kochgeraet
DE3810736A1 (de) * 1988-03-30 1989-10-19 Bentz & Sohn Melitta Durchlauferhitzer, insbesondere fuer eine kaffee- oder teemaschine
DE3827073A1 (de) * 1988-08-10 1990-02-15 Ego Elektro Blanc & Fischer Elektrokochplatte
FR2641930A1 (fr) * 1989-01-13 1990-07-20 Vulcanic Dispositif de chauffage electrique a haute temperature
US5252809A (en) * 1991-02-26 1993-10-12 Lapin-Demin Gmbh Panel heating element and process for its production
ATE320749T1 (de) * 1991-12-20 2006-04-15 Fisher & Paykel Appliances Ltd Geschirrspülmaschine
FR2692426B1 (fr) * 1992-06-11 1994-08-26 Seb Sa Plaque chauffante pour récipient chauffant, notamment pour bouilloire.
DE9208004U1 (de) * 1992-06-15 1992-08-27 Fritz Eichenauer GmbH + Co. KG Fabrik elektrischer Spezialartikel, 6729 Hatzenbühl Heizeinrichtung für eine Reisekaffeemaschine zum Anschluß an Niederspannung
US5782172A (en) * 1992-10-08 1998-07-21 Schacht; Paul Appliance for low and high-heat cooking
JP2516182B2 (ja) * 1993-07-30 1996-07-10 株式会社共和工業所 食品・食品種の加熱調理方法及びそれを利用した装置
DE4333158A1 (de) * 1993-09-29 1995-03-30 Blanco Gmbh & Co Kg Gerät zum Zubereiten von Speisen
JPH09507395A (ja) * 1993-10-21 1997-07-29 オッター コントロールズ リミテッド 電気加熱式湯沸器に関する改良
DE19503723A1 (de) * 1995-02-04 1996-08-08 Ego Elektro Blanc & Fischer Kochplatte mit einem Gußköprer und Verfahren zu ihrer Herstellung
DE19508315C1 (de) * 1995-03-09 1996-05-09 Vontana Wasserbetten Gmbh Heizungsvorrichtung für Wasserbetten
AU1030897A (en) * 1995-12-04 1997-06-27 Aktiebolaget Electrolux A resistive heating element for a cooker
WO1999021401A1 (fr) * 1997-10-21 1999-04-29 Dusko Maravic Element chauffaut d'une grande efficacite
FR2771616B1 (fr) * 1997-11-28 2000-12-22 Moulinex Sa Appareil electrique de cuisson, en particulier friteuse, comportant un element chauffant plat a resistance serigraphiee
US5973298A (en) * 1998-04-27 1999-10-26 White Consolidated Industries, Inc. Circular film heater and porcelain enamel cooktop
GB2338632A (en) * 1998-06-16 1999-12-22 Pifco Ltd Metal sheathed planar element: Edge connector with shutter
EP0967838B1 (fr) * 1998-06-25 2005-07-27 White Consolidated Industries, Inc. Assemblages chauffants à couche mince
US6242722B1 (en) * 1999-07-01 2001-06-05 Thermostone Usa, Llc Temperature controlled thin film circular heater
US6225608B1 (en) 1999-11-30 2001-05-01 White Consolidated Industries, Inc. Circular film heater
DE10018589A1 (de) * 2000-04-14 2001-10-25 Apag Elektronik Ag Duebendorf Heizanordnung
DE10053415A1 (de) * 2000-10-27 2002-05-29 Bsh Bosch Siemens Hausgeraete Elektrischer Heizkörper
JP3897563B2 (ja) * 2001-10-24 2007-03-28 日本碍子株式会社 加熱装置
US7372001B2 (en) * 2002-12-17 2008-05-13 Nhk Spring Co., Ltd. Ceramics heater
DE10322034A1 (de) 2003-05-16 2004-12-02 Stiebel Eltron Gmbh & Co. Kg Flüssigkeitserhitzer
US7025893B2 (en) * 2003-08-12 2006-04-11 Thermo Stone Usa, Llc Structure and method to compensate for thermal edge loss in thin film heaters
US7115324B1 (en) 2003-08-29 2006-10-03 Alcoa Inc. Method of combining welding and adhesive bonding for joining metal components
AT414073B (de) * 2004-10-05 2006-08-15 Kerschbaum Margarete Heizgerät
NL1027571C2 (nl) * 2004-11-23 2006-05-24 Ferro Techniek Holding Bv Emailsamenstelling voor toepassing als dielektricum, en gebruik van een dergelijke emailsamenstelling.
US20090242546A1 (en) * 2008-03-26 2009-10-01 Yungbluth Christian M Cooking apparatus with thermally shielded temperature sensor
DE102012110649C5 (de) * 2012-11-07 2018-03-01 Benteler Automobiltechnik Gmbh Warmformlinie sowie Verfahren zur Herstellung eines warmumgeformten und pressgehärteten Kraftfahrzeugbauteils
WO2015116660A1 (fr) * 2014-01-28 2015-08-06 Spectrum Brands, Inc. Appareil de cuisson à plaque de cuisson possédant un élément chauffant intégré

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0324086A1 (fr) * 1988-01-13 1989-07-19 Fritz Eichenauer GmbH & Co. KG Dispositif de chauffage, en particulier comme plaque de cuisson
DE8909020U1 (de) * 1988-04-15 1989-12-14 Bayer Ag, 5090 Leverkusen Flächenheizelement
EP0481162A3 (en) * 1990-10-15 1992-12-09 Lancet S.A. Domestic cooking apparatus
DE4109569A1 (de) * 1991-03-22 1992-09-24 Buchtal Gmbh Elektrische heizplatte
DE4341035A1 (de) * 1993-12-02 1995-06-08 Ego Elektro Blanc & Fischer Beheizung mit einer Heizeinheit
FR2723430A1 (fr) * 1994-08-04 1996-02-09 Lorraine Laminage Element de cuisson encastrable extra-plat
EP0695914A1 (fr) * 1994-08-04 1996-02-07 Sollac S.A. Elément de cuisson encastrable extra-plat
US5679273A (en) * 1994-08-04 1997-10-21 Sollac (Societe Anonyme) Cooktop having a flat surface, suitable for flush-mounting
DE19638640A1 (de) * 1996-09-21 1998-04-02 Ako Werke Gmbh & Co Strahlungsheizkörper mit einem Metallfolien-Heizleiter
DE19638640C2 (de) * 1996-09-21 2000-11-30 Diehl Ako Stiftung Gmbh & Co Strahlungsheizkörper mit einem Metallfolien-Heizleiter
EP1177708B2 (fr) † 1999-05-04 2012-12-12 Otter Controls Limited Ameliorations apportees a des elements chauffants, notamment dans le domaine des elements chauffants en couche epaisse
DE102011003464A1 (de) 2011-02-01 2012-04-26 E.G.O. Elektro-Gerätebau GmbH Heizeinrichtung für eine Pumpe und Pumpe
EP2481931A2 (fr) 2011-02-01 2012-08-01 E.G.O. Elektro-Gerätebau GmbH Dispositif de chauffage pour une pompe et pompe
DE102011003467A1 (de) 2011-02-01 2012-08-02 E.G.O. Elektro-Gerätebau GmbH Heizeinrichtung für eine Pumpe und Pumpe

Also Published As

Publication number Publication date
EP0229928A3 (en) 1988-03-09
EP0229928B1 (fr) 1992-06-17
DE3545442A1 (de) 1987-06-25
US4843218A (en) 1989-06-27
DE3545442C2 (fr) 1991-05-29
DE3685741D1 (de) 1992-07-23

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