EP0750444A1 - 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
EP0750444A1
EP0750444A1 EP96109730A EP96109730A EP0750444A1 EP 0750444 A1 EP0750444 A1 EP 0750444A1 EP 96109730 A EP96109730 A EP 96109730A EP 96109730 A EP96109730 A EP 96109730A EP 0750444 A1 EP0750444 A1 EP 0750444A1
Authority
EP
European Patent Office
Prior art keywords
tablet
thermal insulation
heating conductor
carrier shell
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.)
Granted
Application number
EP96109730A
Other languages
German (de)
English (en)
Other versions
EP0750444B2 (fr
EP0750444B1 (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=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0750444(A1) "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 carrier shell and an insulating layer inserted therein, on which a heating conductor is attached, and to such a radiant heater.
  • a radiation heating unit for glass ceramic electric cooking devices has become known, in which one or more insulating layers of non-or poorly compressed bulk material lie in a carrier shell. A layer of fibrous insulating material is placed on these layers, on which heating coils are fixed by embedding in the wet state. The plate is held down by a peripheral edge.
  • the heating conductors are attached in an ideal manner, but a two-layer structure is necessary.
  • a radiant heater has become known in which a pourable insulating material is filled into a carrier shell and compressed with a stamp, so that a surface forms on which heating coils are stapled by means of wire clips. The surface does not have to be flat.
  • the surface of the lower layer or the lower surface of the upper layer are arched away from each other.
  • a multi-layer insulation structure is not only complex, but also inferior to a single-layer structure in terms of its insulating effect, at least when one of the layers consists of less good thermal insulation material. For this reason, the aim is to get by with a layer of the best thermal insulation material. It is a pourable insulating material that is pressed accordingly to hold it together.
  • the object of the invention is to provide a method and a radiant heater produced therewith, which are easy to manufacture and highly effective in insulation allows a perfect and even embedding of the heating conductor.
  • the carrier shell produced as a sheet metal plate usually had a naturally convex base.
  • the insulation bulged upwards due to radial compressive stress. If the fastening feet were pressed into this curved surface, the fastening was either imperfect in the edge area or too deep in the central area, so that the radiating surface of the heating conductors was too small.
  • the stamp could not be arched either because the curvature of the thermal insulation layer was unpredictable and uneven and, furthermore, a curved shape of the surface carrying the heat conductor would mean an inadmissible increase in the overall height of the radiant heater.
  • both the production of the molded thermal body and the attachment of the heating conductors are preferably carried out in a separate form outside the carrier shell and the one-piece tablet prepared in this way, fitted with the heating conductor, is placed in the empty sheet metal plate.
  • a convex bottom of the plate plate does not interfere, because it creates an additional air-insulating layer.
  • the tablet is in one piece and preferably also in one layer, but could also be formed as a multi-layer pressed.
  • a secure and tilt-free attachment can be ensured in that the carrier shell has in its edge region an annular support shoulder which is raised in relation to the floor and on which a correspondingly offset edge of the tablet rests.
  • the heating conductors can preferably be a thin, corrugated band of heating conductor material which is fixed upright on the insulating body by means of fastening feet which are formed on the band and which protrude at a distance from one another, but possibly also extend over the entire length of the heating conductor and / or can be interrupted by perforations, are pressed. These are curved in accordance with the corrugation of the band and thus form spade-shaped fastening elements which are stable in shape due to their curvature and which can also be pressed into the finished tablet surface.
  • a pourable insulating material 31 is filled into a mold 12 shown in FIGS. 1 and 2 and, if necessary, smoothed out for uniformity.
  • the shape has an adapted shape of one of the outer shapes of the radiant heater, but need not exactly match this. Rather, the mold recess 33 can deviate from the final shape that the product manufactured therein is supposed to have in such a way that the product according to its Pressing and taking into account all further intermediate steps finally receives the desired final shape.
  • the insulating material is a silica airgel, which is pyrogenic and has a dust-like consistency when unpressed.
  • This silica airgel is normally mixed with additives, such as opacifiers, which reduce the radiation transmission, binders and / or reinforcing agents to increase the mechanical strength, for example fibers.
  • additives such as opacifiers, which reduce the radiation transmission, binders and / or reinforcing agents to increase the mechanical strength, for example fibers.
  • a press ram 13 can be inserted into the mold, which compresses the loose bulk material in such a way that a manageable tablet is formed, but which is not so compacted that it loses its good thermal insulation properties.
  • the design of the press ram possibly deviating from the flat shape of the pressing surface 14, can also ensure that the resulting thermal insulation molding 15, also referred to below as a tablet, has a flat surface.
  • a heating conductor strip 17 is now partially pressed into the surface 18 of the thermal insulation molded part 15 by an insertion stamp 16.
  • the insertion punch 16 has grooves 20 in its surface 19 facing the surface 18. The grooves are arranged in accordance with the desired laying (macro shape) of the heating conductor, for example in a spiral or meandering manner. They are about as wide as the heating conductor.
  • the heating conductor 17 consists of a thin strip of heating conductor material shown in more detail in FIG. 3.
  • the thickness is usually only a few hundred millimeters, e.g. 0.04 - 0.07 mm, while the height is a few millimeters.
  • Fastening feet 22 are arranged on the lower edge of the continuous band-shaped area 21, which are made in one piece with the band by corresponding punching or cutting. These e.g. Rectangular or trapezoid-shaped fastening feet, like the band, are curved in a wave-like manner, so that the band has a corrugation running transversely to its main direction. The axes of curvature of the waves are therefore perpendicular to the surface 18, 19.
  • the heating conductor strips 17 are held in the grooves 20 by appropriate dimensioning and resilient contact or by magnets introduced into the insertion stamp, so that the fastening feet 22 protrude from the grooves 20 beyond the lower surface 19 of the insertion stamp 16.
  • the insertion stamp is pressed against the flat surface 18 of the tablet 15, namely until the fastening feet 22 have penetrated the pre-compressed material.
  • the surface 19 of the insertion die limits the die movement, which, however, can also be intercepted accordingly by a control. A certain amount of repressing can take place, but this is not absolutely necessary.
  • the stamp 16 is raised while the heating conductors 17 remain on the tablet 15. This can be facilitated by e.g. an electromagnet holding the heating conductor is switched off.
  • the thermal insulation molded part 15, which is now firmly connected to the heating conductor strip, is removed from the mold or its holder and can, if necessary after an intermediate storage, be used as prefabricated part can be inserted into a sheet metal carrier shell 23 of a radiant heater.
  • This sheet metal carrier shell has the shape of a flat shell with an edge 25 which is somewhat raised in relation to the bottom 24 and which is adjoined by the vertically projecting outer edge 26.
  • the tablet 15 has a base which is molded in accordance with this shape, namely a recessed base section 27, and an edge region 28 which is offset in comparison therewith and which rests on the support shoulder 25 when the tablet 15 is inserted.
  • annular edge 30 made of a mechanically somewhat firmer and also highly heat-resistant Insert insulation material, for example made of ceramic fibers or vermiculite, which protrudes somewhat above the outer edge of the sheet metal 26 and rests with its top against the underside of a glass ceramic plate 29 which forms the cooking surface.
  • This edge 30 then also serves at the same time to secure the thermal insulation molded part in the carrier shell and prevents it from being lifted off during transport, for example.
  • the heat molded part 11 Due to the large-area hold-down and the fact that this edge 30 engages directly above the support shoulder 25, the heat molded part 11 is only loaded by low compressive forces when the radiant heater 11 is pressed resiliently onto the underside of the glass ceramic plate.
  • the separate heat-insulating molded part 25 can be somewhat smaller than the carrier shell, so that expansions caused by heat, moisture or the like do not lead to tensioning of the heat-insulating molded part.
  • the resulting radiant heater is thus characterized by a surface to be designed that carries the heating conductors and has a uniform embedding depth of the heating conductors, this being independent of the shape of the support shell, the base 24 of which could be curved accidentally or deliberately, in order to avoid any spring washer effects in the process To prevent warming. Due to the single-layer insulation made of highly heat-insulating and high-temperature resistant material, the insulation is very effective and inexpensive to manufacture. Due to the low mechanical requirements, reinforcement by fibers can largely be dispensed with.
  • the surface 18 of the separate thermal insulation molding 15 is flat in the sense that it corresponds exactly to the desired shape.
  • the surface could, for example, also consist of two levels that are offset in height, for example if Heating conductors of different heights can be used in different areas.
  • preference is given to the planar execution of the surface 18 running as precisely as possible parallel to the lower edge of the glass ceramic, the upper edges of the heating conductors then also lying in a plane lying parallel to the glass ceramic surface.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Resistance Heating (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Aerials With Secondary Devices (AREA)
  • Constitution Of High-Frequency Heating (AREA)
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
DE19522798 1995-06-23
DE19522798A DE19522798A1 (de) 1995-06-23 1995-06-23 Verfahren zur Herstellung eines Strahlungsheizkörpers und Strahlungsheizkörper

Publications (3)

Publication Number Publication Date
EP0750444A1 true EP0750444A1 (fr) 1996-12-27
EP0750444B1 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)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1229763A2 (fr) * 2001-02-02 2002-08-07 Eika, S.Coop Résistance plate destinée au chauffage de plaque de cuisson
DE102006017998A1 (de) * 2006-04-07 2007-10-11 E.G.O. Elektro-Gerätebau GmbH Heizvorrichtung und Kochfeld mit einer solchen Heizvorrichtung
DE102012002163A1 (de) 2012-01-31 2013-08-01 E.G.O. Elektro-Gerätebau GmbH Heizeinrichtung, Verwendung einer solchen Heizeinrichtung und Verfahren zur Herstellung
EP3115698A1 (fr) 2015-07-09 2017-01-11 E.G.O. ELEKTRO-GERÄTEBAU GmbH Plan de cuisson
EP3771287A1 (fr) 2019-07-25 2021-01-27 E.G.O. Elektro-Gerätebau GmbH Dispositif chauffant à rayonnement et plaque de cuisson dotée d'un tel dispositif chauffant à rayonnement

Families Citing this family (10)

* 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
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
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
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
DE102017222958A1 (de) 2017-09-04 2019-03-07 E.G.O. Elektro-Gerätebau GmbH Heizeinrichtung und Verfahren zur Herstellung einer Heizeinrichtung
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

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4161648A (en) * 1975-11-14 1979-07-17 E. G. O. Elektro-Geraete Blanc Und Fischer Electrical radiation heater for a glass ceramic plate
DE9419922U1 (de) * 1993-12-24 1995-02-02 Ceramaspeed Ltd., Droitwich, Worcestershire Elektrischer Strahlungsheizer

Family Cites Families (15)

* 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
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
GB2275161B (en) * 1993-02-11 1996-05-15 Ceramaspeed Ltd Method of manufacturing a radiant electric heater
ES2109601T3 (es) * 1993-02-11 1998-01-16 Ceramaspeed Ltd Elemento de calentamiento electrico, su fabricacion y su uso.
GB2275160B (en) * 1993-02-11 1996-04-03 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

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4161648A (en) * 1975-11-14 1979-07-17 E. G. O. Elektro-Geraete Blanc Und Fischer Electrical radiation heater for a glass ceramic plate
DE9419922U1 (de) * 1993-12-24 1995-02-02 Ceramaspeed Ltd., Droitwich, Worcestershire Elektrischer Strahlungsheizer

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1229763A2 (fr) * 2001-02-02 2002-08-07 Eika, S.Coop Résistance plate destinée au chauffage de plaque de cuisson
EP1229763A3 (fr) * 2001-02-02 2004-12-22 Eika, S.Coop Résistance plate destinée au chauffage de plaque de cuisson
DE102006017998A1 (de) * 2006-04-07 2007-10-11 E.G.O. Elektro-Gerätebau GmbH Heizvorrichtung und Kochfeld mit einer solchen Heizvorrichtung
DE102012002163A1 (de) 2012-01-31 2013-08-01 E.G.O. Elektro-Gerätebau GmbH Heizeinrichtung, Verwendung einer solchen Heizeinrichtung und Verfahren zur Herstellung
WO2013113703A1 (fr) 2012-01-31 2013-08-08 E.G.O. Elektro-Gerätebau GmbH Dispositif de chauffage, utilisation d'un tel dispositif de chauffage et son procédé de fabrication
EP3115698A1 (fr) 2015-07-09 2017-01-11 E.G.O. ELEKTRO-GERÄTEBAU GmbH Plan de cuisson
DE102015212916A1 (de) 2015-07-09 2017-01-12 E.G.O. Elektro-Gerätebau GmbH Kochfeld
EP3771287A1 (fr) 2019-07-25 2021-01-27 E.G.O. Elektro-Gerätebau GmbH Dispositif chauffant à rayonnement et plaque de cuisson dotée d'un tel dispositif chauffant à rayonnement

Also Published As

Publication number Publication date
SI0750444T1 (en) 2002-04-30
TR199600520A2 (tr) 1997-03-21
ES2169175T3 (es) 2002-07-01
EP0750444B2 (fr) 2006-04-12
SI0750444T2 (sl) 2006-08-31
DE59608342D1 (de) 2002-01-17
ATE210363T1 (de) 2001-12-15
ES2169175T5 (es) 2006-11-16
EP0750444B1 (fr) 2001-12-05
US5834740A (en) 1998-11-10
DE19522798A1 (de) 1997-01-02

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