EP0750444B1 - Corps de chauffe rayonnant et son procédé de fabrication - Google Patents

Corps de chauffe rayonnant et son procédé de fabrication Download PDF

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Publication number
EP0750444B1
EP0750444B1 EP96109730A EP96109730A EP0750444B1 EP 0750444 B1 EP0750444 B1 EP 0750444B1 EP 96109730 A EP96109730 A EP 96109730A EP 96109730 A EP96109730 A EP 96109730A EP 0750444 B1 EP0750444 B1 EP 0750444B1
Authority
EP
European Patent Office
Prior art keywords
tablet
thermally insulating
insulating layer
heating conductor
radiant heater
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.)
Expired - Lifetime
Application number
EP96109730A
Other languages
German (de)
English (en)
Other versions
EP0750444B2 (fr
EP0750444A1 (fr
Inventor
Eugen Wilde
Martin Gross
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.)
EGO Elektro Geratebau GmbH
Original Assignee
EGO Elektro Geratebau 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7765062&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0750444(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by EGO Elektro Geratebau GmbH filed Critical EGO Elektro Geratebau GmbH
Priority to SI9630441T priority Critical patent/SI0750444T2/sl
Priority to DE29624627U priority patent/DE29624627U1/de
Publication of EP0750444A1 publication Critical patent/EP0750444A1/fr
Application granted granted Critical
Publication of EP0750444B1 publication Critical patent/EP0750444B1/fr
Publication of EP0750444B2 publication Critical patent/EP0750444B2/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
    • H05B3/74—Non-metallic plates, e.g. vitroceramic, ceramic or glassceramic hobs, also including power or control circuits
    • H05B3/748—Resistive heating elements, i.e. heating elements exposed to the air, e.g. coil wire heater
    • 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
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/017—Manufacturing methods or apparatus for heaters
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49082—Resistor making
    • Y10T29/49083—Heater type

Definitions

  • the invention relates to a method for producing a Radiant heater with a support shell and one in it inserted insulation layer, on which a heating conductor is attached is, and such a radiant heater.
  • DE 27 29 930 A is a radiation heating unit for Glass ceramic electric cooking devices have become known, in which one or more insulating layers from a carrier shell loose or slightly compacted bulk material. On these layers become a sheet of fibrous insulating material placed on the heating coils by embedding in the wet state are set. The plate is made by a revolving Edge held down. Here is the attachment of the heating conductor ideally done, but a two-layer Construction necessary.
  • a radiant heater has become known from DE 28 06 367 A, in which a pourable insulating material in a Carrier shell filled and compressed with a stamp so that a surface forms on the heating coils can be stapled with wire clips. The surface need not be level.
  • Heating coils have become known from EP 35 280 B, wherein a lower, thin layer of pourable insulating material is pressed directly into the carrier shell while over it a thicker layer of inorganic adhesive Aluminum silicate lies above it, which is the heating conductor can "stick".
  • a method of making a radiant heater according to the first part of claim 1 and a Radiant heater according to the first part of the claim 5 is known from DE-U-9 419 922.
  • a multilayer insulation structure is not only complex, but also in terms of its insulating effect inferior to a single-layer structure at least if one the layers consist of less good thermal insulation material. That is why the aim is to use one layer if possible to get by with the best thermal insulation material. there it is pourable insulating material that for Cohesion is pressed accordingly.
  • the object of the invention is a method and a so to produce radiant heaters, which at simple manufacture and great effectiveness of the insulation perfect and even embedding of the Heating conductor allows.
  • the invention is both the production of the molded thermal body as well as the attachment of the heating conductor preferably in a separate form outside the carrier shell made and the so prepared with the heat conductor Loaded one-piece tablet into the empty tin plate inserted.
  • a convex base of the sheet metal plate interferes with this by no means, because it creates an additional layer of air insulation arises.
  • the tablet is in one piece and is preferred also single-layer, but could also be multi-layered be pressed.
  • the heating conductors can preferably be a thin one corrugated band of heating conductor material act upright is attached to the insulator by using it the tape integrally formed mounting feet that are spaced protrude from each other, but possibly also over the entire length of the heating conductor go through and / or interrupted by perforations can be pressed. These are according to the Corrugation of the band arched and thus form spades and through their curvature, form-fitting fasteners that also pressed into the finished tablet surface can be.
  • the shape has one of the outer shapes of the Radiant heater approximately adapted shape, must with this but do not match exactly.
  • the mold recess 33 can rather of the final form, which is what it produces Product should differ so that the product according to its Pressing and taking into account all further intermediate steps finally gets the desired final shape.
  • the insulating material is a silica airgel, the pyrogenic is manufactured and in the uncompressed Condition has a dusty consistency.
  • This silica airgel is usually with additives such as opacifiers, which reduce radiation transmission, binders and / or reinforcing means to increase the mechanical Strength, for example fibers, mixed. It is however desirable and an advantage of the invention that the separate Thermal insulation molding can be made fiber-free.
  • a press ram 13 can be inserted into the mold the loose bulk material compacted so that a manageable Tablet is formed, but it is not compressed as much, that it would lose its good thermal insulation properties. Except by the design of the shape recess can also by Design of the press ram, possibly in deviation from the flat shape of the pressing surface 14, be ensured that the emerging, also referred to below as a tablet, Thermal insulation molding 15 has a flat surface.
  • the grooves are corresponding to the desired laying (Macroform) of the heating conductor arranged, for example spiral or meandering. They are something like that wide as the heating conductor.
  • the heating conductor 17 consists of the example shown a thin strip of heating conductor material shown in Fig. 3.
  • the thickness is usually only a few hundred digits Millimeters, e.g. 0.04 - 0.07 mm while the height is a few millimeters.
  • fastening feet 22 arranged with the tape in one piece by appropriate Punching or cutting are made.
  • Rectangular or trapezoid-shaped mounting feet are, like the band, wavy curved, so that the Tape a curl across its main direction having.
  • the axes of curvature of the waves are therefore perpendicular to the surface 18, 19.
  • the heating conductor strips 17 are in the grooves 20 by appropriate Design and resilient system or by in the Inserted magnets held so that the Fastening feet 22 out of the grooves 20 over the lower one Stand out surface 19 of the insertion punch 16. So it will Insert stamp against the flat surface 18 of the tablet 15 pressed, until the mounting feet 22 in the pre-compressed material has penetrated.
  • the surface 19 of the insertion stamp limits the stamp movement that but also intercepted accordingly by a controller can be. A certain amount of repressing can take place which, however, is not absolutely necessary. Then the Stamp 16 started up while the heating conductor 17 on the Tablet 15 stay. This can be facilitated that e.g. an electromagnet holding the heating conductor is switched off becomes.
  • This sheet metal carrier shell has the shape of a flat bowl with one opposite the bottom 24 slightly raised edge 25 to which the vertical towering outer edge 26 connects.
  • the tablet 15 has a shaped base according to this shape, namely a recessed bottom portion 27, and one opposite upwardly offset edge region 28, which when inserting the Tablet 15 rests on the support shoulder 25.
  • annular rim 30 from a mechanical something firmer and also highly heat-resistant insulation material, for example from ceramic fibers or vermiculite, insert that protrudes slightly above the sheet metal outer edge 26 and with its top against the bottom of a glass ceramic plate 29 creates, which forms the cooking surface.
  • This Edge 30 then also serves as a backup of the Insulated molded part in the carrier shell and prevents, for example take off in transport.
  • the heat molded part 11 Due to the large area Restraint and the fact that this edge 30 immediately engages over the support shoulder 25, the heat molded part 11 only burdened by low compressive forces if the radiant heater 11 resiliently to the bottom of the Glass ceramic plate is pressed.
  • the separate thermal insulation molding 25 In diameter, i.e. in the horizontal dimensions, the separate thermal insulation molding 25 be slightly smaller than the carrier shell, so that also due to heat, moisture or the like do not lead to distortion of the thermal insulation molded part.
  • the resulting radiant heater is characterized by a surface to be designed to carry the heating conductor with a uniform embedding depth of the heating conductor, whereby this is independent of the shape of the carrier shell, the Floor 24 could be randomly or deliberately curved, for possible spring washer effects during heating to prevent. Thanks to the single-layer insulation made of highly heat-insulating and high temperature resistant material is the insulation very effective and inexpensive to manufacture. Because of The low mechanical requirements can largely be attributed to reinforcement by fibers can be dispensed with.
  • the surface 18 of the separate thermal insulation molding 15 is in the sense that it corresponds exactly to the desired shape.
  • the surface could be two levels offset from each other in terms of height, if e.g. Heating conductors of different heights in different Areas are used.
  • this is preferred if possible exactly parallel to the lower edge of the glass ceramic flat design of the surface 18, and then also the upper edges of the heating conductors in one to the glass ceramic surface parallel plane.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Resistance Heating (AREA)
  • Aerials With Secondary Devices (AREA)
  • Constitution Of High-Frequency Heating (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Claims (8)

  1. Procédé pour la fabrication d'un corps de chauffe à rayonnement (11) avec une cuvette de support (23) et une couche d'isolation thermique ou couche d'isolation contre les effets de la chaleur (15) placée à l'intérieur de celle-ci, à la surface (18) de laquelle est fixé un conducteur chauffant (17) par incorporation partielle du conducteur chauffant dans le matériau d'isolation thermique de la couche d'isolation thermique, caractérisé en ce que la couche d'isolation thermique (15) est moulée en tant que pastille en matériau d'isolation thermique (31) déversable avec une surface (18) essentiellement plane, par compression dans un moule (12) à part, et que la pastille est mise en place dans la cuvette de support (23) vide en tant qu'isolation thermique d'une seule pièce.
  2. Procédé d'après la revendication 1, caractérisé en ce que l'incorporation partielle est effectuée dans le domaine de pattes de fixation (22) saillantes du conducteur chauffant.
  3. Procédé d'après la revendication 1 ou 2, caractérisé en ce que le conducteur chauffant (17) est placé dans un outil d'insertion (16) et qu'il est imprimé avec ses élements (22) d'incorporation dans la surface de la pastille (15).
  4. Procédé d'après une des revendications précédentes, caractérisé en ce que la pastille (15) est à couche unique et qu'elte est constituée de préférence principalement d'un aérogel pyrogène d'acide silicique comprimé.
  5. Corps de chauffe à rayonnement (11) avec une cuvette de support (23) et une couche d'isolation thermique (15) placée à l'intérieur de celle-ci, sur laquelle est fixé un conducteur chauffant (17) par immersion partielle dans le matériau d'isolation thermique de la couche d'isolation thermique, caractérisé en ce que la couche d'isolation thermique (15) consiste en une pastille en matériau d'isolation thermique obtenue par compression dans un moule à part, laquelle s'appuie essentiellement seulement dans son domaine marginal directement sur la cuvette de support (23).
  6. Corps de chauffe à rayonnement d'après la revendication 5, caractérisé en ce que la cuvette de support (23) présente dans le domaine marginal un épaulement d'appui (25) surélevé par rapport à son fond (24), sur lequel s'appuie la pastille constituant la couche d'isolation thermique (15), éventuellement avec une saillie (28) correspondante, tandis que dans le domaine du fond il existe un écart entre le fond (27) de la pastille et le fond (24) de la cuvette de support (23).
  7. Corps de chauffe à rayonnement d'après la revendication 5 ou 6, caractérisé en ce que le conducteur chauffant (17) est une bande (21) ondulée en matériau de résistance métallique, mince, en position droite sur la surface (18) de la pastille (15), laquelle présente des pattes de fixation (22) saillant vers le bas et qui sont courbées de préférence de manière correspondante à l'ondulation, lesquelles sont incorporées dans la couche d'isolation thermique (15).
  8. Corps de chauffe à rayonnement d'après une des revendications de 5 à 7, caractérisé en ce que la surface (18) de la pastille (15) et/ou l'arête supérieure du conducteur chauffant se trouvent respectivement dans des plans, ces plans étant de préférence parallèles entr'eux.
EP96109730A 1995-06-23 1996-06-18 Corps de chauffe rayonnant et son procédé de fabrication Expired - Lifetime EP0750444B2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SI9630441T SI0750444T2 (sl) 1995-06-23 1996-06-18 Postopek za izdelavo sevalnega grelnega telesa insevalno grelno telo
DE29624627U DE29624627U1 (de) 1996-06-18 1996-06-18 Strahlungsheizkörper

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19522798A DE19522798A1 (de) 1995-06-23 1995-06-23 Verfahren zur Herstellung eines Strahlungsheizkörpers und Strahlungsheizkörper
DE19522798 1995-06-23

Publications (3)

Publication Number Publication Date
EP0750444A1 EP0750444A1 (fr) 1996-12-27
EP0750444B1 true EP0750444B1 (fr) 2001-12-05
EP0750444B2 EP0750444B2 (fr) 2006-04-12

Family

ID=7765062

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96109730A Expired - Lifetime EP0750444B2 (fr) 1995-06-23 1996-06-18 Corps de chauffe rayonnant et son procédé de fabrication

Country Status (7)

Country Link
US (1) US5834740A (fr)
EP (1) EP0750444B2 (fr)
AT (1) ATE210363T1 (fr)
DE (2) DE19522798A1 (fr)
ES (1) ES2169175T5 (fr)
SI (1) SI0750444T2 (fr)
TR (1) TR199600520A2 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2323762B (en) * 1997-03-27 2001-01-31 Ceramaspeed Ltd Method of securing a heating element
DE19755114A1 (de) * 1997-12-11 1999-06-17 Ego Elektro Geraetebau Gmbh Heizkörper, insbesondere für Küchengeräte
ES1048230Y (es) * 2001-02-02 2001-12-01 Eika S Coop Resistencia electrica de caldeo plana para una placa de cocina.
GB0202957D0 (en) 2002-02-08 2002-03-27 Ceramaspeed Ltd Method and apparatus for manufacturing an electric heater
DE102005036581A1 (de) * 2005-08-01 2007-02-08 Electrovac Ag Heizband für einen elektrischen Heizer, Heizer mit einem derartigen Heizband sowie Verfahren zum Herstellen des Heizbandes
DE102006017998A1 (de) * 2006-04-07 2007-10-11 E.G.O. Elektro-Gerätebau GmbH Heizvorrichtung und Kochfeld mit einer solchen Heizvorrichtung
DE102007038782A1 (de) 2007-08-06 2009-02-19 E.G.O. Elektro-Gerätebau GmbH Abdeckteil für die Unterseite einer Kochplatte und Herstellungsverfahren und Kochplatte mit einem solchen Abdeckteil und Herstellungsverfahren
GB0811980D0 (en) * 2008-07-07 2008-07-30 Ceramaspeed Ltd Radiant electric heater
DE102012002163A1 (de) 2012-01-31 2013-08-01 E.G.O. Elektro-Gerätebau GmbH Heizeinrichtung, Verwendung einer solchen Heizeinrichtung und Verfahren zur Herstellung
WO2014025248A1 (fr) * 2012-08-10 2014-02-13 Vbc Electro-Heat Sdn. Bhd. Elément chauffant/réchauffeur en mica pour table de cuisson électrique
EP3116286A4 (fr) 2015-05-15 2017-04-19 Shenzhen Foda Electric Co., Ltd. Plaque chauffante à régulation de température, isolée thermiquement
DE102015212916A1 (de) 2015-07-09 2017-01-12 E.G.O. Elektro-Gerätebau GmbH Kochfeld
EP3451791B1 (fr) 2017-09-04 2020-03-25 E.G.O. Elektro-Gerätebau GmbH Dispositif de chauffage et procédé de fabrication d'un dispositif de chauffage
DE102017222958A1 (de) 2017-09-04 2019-03-07 E.G.O. Elektro-Gerätebau GmbH Heizeinrichtung und Verfahren zur Herstellung einer Heizeinrichtung
DE102019211101A1 (de) 2019-07-25 2021-01-28 E.G.O. Elektro-Gerätebau GmbH Strahlungsheizeinrichtung und Kochfeld mit einer solchen Strahlungsheizeinrichtung

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2729930C2 (de) * 1977-07-02 1993-02-18 E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen Verfahren zur Herstellung eines elektrischen Strahlungs-Heizelementes
DE2551137C2 (de) * 1975-11-14 1986-04-24 E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen Elektrischer Strahlungsheizkörper für Glaskeramikkochplatten
GB1580909A (en) * 1977-02-10 1980-12-10 Micropore Internatioonal Ltd Thermal insulation material
EP0035280B1 (fr) * 1980-03-05 1984-06-20 Grünzweig + Hartmann und Glasfaser AG Dispositif d'isolation thermique d'une source de chaleur
DE3519350A1 (de) * 1985-05-30 1986-12-04 E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen Strahlungs-heizeinheit
DE3527413A1 (de) † 1985-07-31 1987-02-12 Ego Elektro Blanc & Fischer Elektrischer strahlheizkoerper zur beheizung von heizflaechen sowie verfahren und vorrichtung zu seiner herstellung
GB8625556D0 (en) * 1986-10-25 1986-11-26 Micropore International Ltd Radiant heaters
DE3828192A1 (de) † 1988-08-19 1990-02-22 Ego Elektro Blanc & Fischer Strahlheizkoerper sowie verfahren und vorrichtung zu seiner herstellung
DE4019898A1 (de) † 1990-06-22 1992-01-02 Ego Elektro Blanc & Fischer Verfahren und vorrichtung zum befestigen von heizwiderstaenden auf einem traeger
DE4022292A1 (de) * 1990-07-15 1992-01-16 Ego Elektro Blanc & Fischer Elektrisches strahlungsheizelement
GB9102133D0 (en) * 1991-01-31 1991-03-13 Ceramaspeed Ltd Radiant electric heaters
DK0612199T3 (da) * 1993-02-11 1998-07-27 Ceramaspeed Ltd Elektrisk varmeelement, dets fremstilling og anvendelse
GB2275160B (en) * 1993-02-11 1996-04-03 Ceramaspeed Ltd Method of manufacturing a radiant electric heater
GB2275161B (en) * 1993-02-11 1996-05-15 Ceramaspeed Ltd Method of manufacturing a radiant electric heater
DE4310613A1 (de) † 1993-03-31 1994-10-06 Wacker Chemie Gmbh Mikroporöser Wärmedämmformkörper
DE4331702A1 (de) * 1993-09-17 1995-03-23 Wacker Chemie Gmbh Strahlungsheizkörper, insbesondere zum Beheizen einer glaskeramischen Kochplatte
GB2285058B (en) * 1993-12-24 1997-01-08 Ceramaspeed Ltd Radiant Electric Heater

Also Published As

Publication number Publication date
ATE210363T1 (de) 2001-12-15
SI0750444T2 (sl) 2006-08-31
EP0750444B2 (fr) 2006-04-12
US5834740A (en) 1998-11-10
ES2169175T3 (es) 2002-07-01
DE59608342D1 (de) 2002-01-17
ES2169175T5 (es) 2006-11-16
DE19522798A1 (de) 1997-01-02
TR199600520A2 (tr) 1997-03-21
SI0750444T1 (en) 2002-04-30
EP0750444A1 (fr) 1996-12-27

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