EP0750444B2 - Verfahren zur Herstellung eines Strahlungsheizkörpers und Strahlungsheizkörper - Google Patents

Verfahren zur Herstellung eines Strahlungsheizkörpers und Strahlungsheizkörper Download PDF

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Publication number
EP0750444B2
EP0750444B2 EP96109730A EP96109730A EP0750444B2 EP 0750444 B2 EP0750444 B2 EP 0750444B2 EP 96109730 A EP96109730 A EP 96109730A EP 96109730 A EP96109730 A EP 96109730A EP 0750444 B2 EP0750444 B2 EP 0750444B2
Authority
EP
European Patent Office
Prior art keywords
tablet
thermally insulating
radiant heater
insulating layer
heat
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)
French (fr)
Other versions
EP0750444B1 (de
EP0750444A1 (de
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(B2) "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/de
Publication of EP0750444B1 publication Critical patent/EP0750444B1/de
Application granted granted Critical
Publication of EP0750444B2 publication Critical patent/EP0750444B2/de
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 radiant heater with a carrier shell and an insulating layer inserted therein, on which a heating element is attached.
  • a radiant heating unit for glass-ceramic electric cooking appliances has become known in which lie in a carrier shell one or more insulating layers of non or weakly compacted bulk material. On these layers, a plate of fibrous insulating material is laid on which are fixed by embedding in the wet state heating coils. The plate is held down by a peripheral edge.
  • the attachment of the heating element is made in an ideal way, however, a two-layer structure needed.
  • a radiant heater has become known in which a pourable insulating material is filled in a carrier shell and compacted with a stamp, so that a surface is formed, are stapled to the heating coils by means of wire staples.
  • the surface does not need to be flat.
  • a radiant heater according to the first part of claim 1 is known from DE-U-9 419 922.
  • the surface of the lower layer and the lower surface of the upper layer are each arched away from each other.
  • a multilayer insulation structure is not only expensive, but at least inferior to a single-layer structure with regard to its insulating effect, if one of the layers consists of less good heat-insulating material. Therefore, the aim is to get along as possible with a layer of highly insulating material. It is pourable insulating material, which is pressed to cohesion accordingly.
  • the object of the invention is to provide a radiant heater, which allows a simple and uniform embedding of the heat conductor with ease of manufacture and high efficiency of the insulation.
  • a radiant heater according to claim 1 The preparation of the entire insulation of pourable high temperature resistant thermal insulation material as a prefabricated tablet allows the production in a size and shape accurately sized form, in particular it can be ensured that after the compression of the insulating material, the surface of the tablet is flat. In this flat surface, the heating element, which are received in an otherwise flat punch In grooves, from which they protrude with their mounting feet, so press that the feet are pressed equally deep into the surface and, accordingly, the protruding part always is equally wide if this is intended.
  • the support tray made as a sheet metal plate usually had a naturally convex bottom.
  • the insulation also bulged upwards due to radial compressive stress. If the fixing feet were pressed into this upwardly curved surface, then either the attachment in the edge region was imperfect or too deep in the middle region, so that the radiating surface of the heating conductor became too small.
  • both the production of the thermal insulation molding as well as the attachment of the heating element is preferably carried out in a separate form outside the carrier shell and inserted the thus prepared, equipped with the heating conductor one-piece tablet in the empty sheet metal plate.
  • a convex bottom of the tin plate does not interfere, as it creates an additional air-insulating layer.
  • the tablet is in one piece and preferably one-layered, but could also be formed as a multilayer pressed.
  • a secure and tilt-free attachment is ensured by the fact that the carrier shell has in its edge region a raised relative to the bottom, annular support shoulder on which a possibly corresponding remote edge of the tablet rests.
  • the heating conductors may preferably be a thin corrugated band of heating conductor material which is fastened upright on the insulating body by projecting with fastening feet formed on the band which protrude at a distance from one another, but possibly also over the entire heating conductor length go through and / or can be interrupted by perforations are pressed. These are curved according to the corrugation of the band and thus form spade-shaped and shaped by its curvature fastening elements that can be pressed into the finished tablet surface.
  • a flowable insulating material 31 is filled into a mold 12 shown in FIGS. 1 and 2 and, if necessary, smoothed for the purpose of comparison.
  • the shape has one of the outer shapes of the radiant heater approximately matched shape, but does not have to match exactly. Instead, the mold cavity 33 may deviate from the final shape intended for the product produced therein so that the product finally obtains the desired final shape after being compressed and taking into account all further intermediate steps.
  • the insulating material is a silica airgel, which is produced pyrogenically and has a dust-like consistency when not pressed.
  • This silica airgel is usually blended with additives such as opacifiers that reduce radiation transmission, binders and / or reinforcing agents to increase mechanical strength, such as fibers.
  • additives such as opacifiers that reduce radiation transmission, binders and / or reinforcing agents to increase mechanical strength, such as fibers.
  • thermal insulation molding 15 has a flat surface.
  • a Schuleiterband 17 is now partially pressed into the surface 18 of the thermal insulation molding 15 by an insertion punch 16.
  • the insertion die has 16 grooves 20 in its surface 18 facing surface 19.
  • the grooves are arranged according to the desired installation (Macroform) of the heating element, for example, spiral or meandering. They are about as wide as the heating conductor.
  • the heating conductor 17 consists of a thin strip of heating conductor material shown in greater detail in FIG.
  • the thickness is usually only a few hundredths of a millimeter, e.g. 0.04-0.07 mm, while the height is a few millimeters.
  • mounting feet 22 are arranged, which are made with the tape in one piece by appropriate punching or cutting. This e.g. rectangular or trapezoidal limited mounting feet are, like the band, curved in a wave, so that the band has a transverse to its main direction corrugation. The axes of curvature of the waves are thus perpendicular to the surface 18, 19.
  • the Schuleiterb sections 17 are held in the grooves 20 by appropriate design and resilient system or by introduced into the insert magnets, so that the mounting feet 22 protrude out of the grooves 20 on the lower surface 19 of the insert 16.
  • the insertion punch is pressed against the flat surface 18 of the tablet 15, and that until the mounting feet 22 have penetrated into the pre-compressed material.
  • the surface 19 of the insertion punch limits the punch movement, which however can also be adequately intercepted by a controller. This can be done a certain Nachverpressung, but this is not absolutely necessary.
  • the punch 16 is raised while the heat conductors 17 remain on the tablet 15. This can be facilitated by e.g. a holding the heating element holding solenoid is turned off.
  • This sheet-metal tray has the shape of a flat shell with a relative to the bottom 24 slightly raised edge 25, to which the vertically projecting outer edge 26 connects.
  • the tablet 15 has a base formed in accordance with this shape, namely a recessed bottom portion 27, and a contrast edge section 28 which rests on the support shoulder 25 when the tablet 15 is inserted.
  • the heat-insulating molding subsequent to the flat surface 18 may form an upstanding edge in the outer region, which internally insulates the outer edge 26 of the sheet metal carrier shell 23
  • a separate annular rim 30 made of a mechanically somewhat stronger and likewise highly heat-resistant insulating material. Material, for example of ceramic fibers or vermiculite insert, which projects slightly above the sheet-metal outer edge 26 and rests with its upper side to the underside of a glass ceramic plate 29, which forms the cooking surface.
  • This edge 30 then also serves as a backup of the heat-insulating molding in the carrier shell and prevents, for example in transport lifting.
  • the heat-molded part 11 is charged only by low compressive forces when the radiant heater 11 is resiliently pressed against the underside of the glass ceramic plate.
  • the separate thermal insulation molding 25 may be slightly smaller than the carrier shell, so that even heat, moisture or the like. Conditional expansions do not lead to a strain of the thermal insulation molding.
  • the resulting radiant heater is thus characterized by a heating element carrying flat to be designed surface with uniform embedding depth of the heating element, which is independent of the shape of the carrier shell, the bottom 24 could be quite random or deliberately curved to any jump glass effects in the Prevent heating. Due to the single-layer insulation made of highly heat-insulating and high-temperature-resistant material, the insulation is very effective and inexpensive to produce. Due to the low mechanical requirements can be largely dispensed with a reinforcement by fibers.
  • the surface 18 of the separate heat-insulating molding 15 is flat in the sense that it corresponds exactly to the desired shape.
  • the surface could also consist of two levels offset from each other in height, e.g. Heating conductors of different heights can be used in different areas.
  • the flat version of the surface 18, which runs as exactly as possible parallel to the lower edge of the glass ceramic, is preferred, 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)
  • Constitution Of High-Frequency Heating (AREA)
  • Aerials With Secondary Devices (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
EP96109730A 1995-06-23 1996-06-18 Verfahren zur Herstellung eines Strahlungsheizkörpers und Strahlungsheizkörper Expired - Lifetime EP0750444B2 (de)

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 EP0750444A1 (de) 1996-12-27
EP0750444B1 EP0750444B1 (de) 2001-12-05
EP0750444B2 true EP0750444B2 (de) 2006-04-12

Family

ID=7765062

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96109730A Expired - Lifetime EP0750444B2 (de) 1995-06-23 1996-06-18 Verfahren zur Herstellung eines Strahlungsheizkörpers und Strahlungsheizkörper

Country Status (7)

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

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 (en) * 2012-08-10 2014-02-13 Vbc Electro-Heat Sdn. Bhd. Mica warmer heater for electrical cook top
EP3116286A4 (en) 2015-05-15 2017-04-19 Shenzhen Foda Electric Co., Ltd. Thermally-insulated temperature-controlled heating plate
DE102015212916A1 (de) 2015-07-09 2017-01-12 E.G.O. Elektro-Gerätebau GmbH Kochfeld
DE102017222958A1 (de) 2017-09-04 2019-03-07 E.G.O. Elektro-Gerätebau GmbH Heizeinrichtung und Verfahren zur Herstellung einer Heizeinrichtung
PL3451791T3 (pl) 2017-09-04 2020-11-16 E.G.O. Elektro-Gerätebau GmbH Urządzenie grzewcze i sposób wytwarzania urządzenia grzewczego
DE102019211101A1 (de) 2019-07-25 2021-01-28 E.G.O. Elektro-Gerätebau GmbH Strahlungsheizeinrichtung und Kochfeld mit einer solchen Strahlungsheizeinrichtung

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4713527A (en) † 1985-05-30 1987-12-15 Ego Elektro Gerate Blanc U. Fischer Radiant heating unit
US4789773A (en) † 1985-07-31 1988-12-06 E.G.O. Elektro-Gerate Blanc U. Fischer Electrical radiant heater for heating heating surfaces
US5181312A (en) † 1990-06-22 1993-01-26 E.G.O. Elektro-Gerate Blanc U. Fischer Method and apparatus for fixing heating resistors to a support
US5196678A (en) † 1988-08-19 1993-03-23 E.G.O. Elektro-Gerate Blanc U. Fischer Radiant heater, as well as method and apparatus for its production
EP0612196A1 (en) † 1993-02-11 1994-08-24 Ceramaspeed Limited Method of manufacturing a radiant electric heater
EP0618399A1 (de) † 1993-03-31 1994-10-05 Wacker-Chemie GmbH Mikroporöser Wärmedämmformkörper
EP0644707A1 (de) † 1993-09-17 1995-03-22 Wacker-Chemie GmbH Strahlungsheizkörper, insbesondere zum Beheizen einer glaskeramischen Kochplatte

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2729930A1 (de) * 1977-07-02 1979-01-11 Karl Fischer Strahlungs-heizeinheit fuer glaskeramik-elektrokochgeraete
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 (de) * 1980-03-05 1984-06-20 Grünzweig + Hartmann und Glasfaser AG Vorrichtung zur Wärmedämmung einer Wärmequelle
GB8625556D0 (en) * 1986-10-25 1986-11-26 Micropore International Ltd Radiant heaters
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
EP0612199B1 (en) * 1993-02-11 1997-11-19 Ceramaspeed Limited Electrical heating element, its manufacture and use
GB2285058B (en) * 1993-12-24 1997-01-08 Ceramaspeed Ltd Radiant Electric Heater

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4713527A (en) † 1985-05-30 1987-12-15 Ego Elektro Gerate Blanc U. Fischer Radiant heating unit
US4789773A (en) † 1985-07-31 1988-12-06 E.G.O. Elektro-Gerate Blanc U. Fischer Electrical radiant heater for heating heating surfaces
US5196678A (en) † 1988-08-19 1993-03-23 E.G.O. Elektro-Gerate Blanc U. Fischer Radiant heater, as well as method and apparatus for its production
US5181312A (en) † 1990-06-22 1993-01-26 E.G.O. Elektro-Gerate Blanc U. Fischer Method and apparatus for fixing heating resistors to a support
EP0612196A1 (en) † 1993-02-11 1994-08-24 Ceramaspeed Limited Method of manufacturing a radiant electric heater
EP0618399A1 (de) † 1993-03-31 1994-10-05 Wacker-Chemie GmbH Mikroporöser Wärmedämmformkörper
US5556689A (en) † 1993-03-31 1996-09-17 Wacker-Chemie Gmbh Microporous thermal insulation molding
EP0644707A1 (de) † 1993-09-17 1995-03-22 Wacker-Chemie GmbH Strahlungsheizkörper, insbesondere zum Beheizen einer glaskeramischen Kochplatte

Also Published As

Publication number Publication date
ES2169175T3 (es) 2002-07-01
DE59608342D1 (de) 2002-01-17
US5834740A (en) 1998-11-10
DE19522798A1 (de) 1997-01-02
ATE210363T1 (de) 2001-12-15
SI0750444T1 (en) 2002-04-30
EP0750444B1 (de) 2001-12-05
TR199600520A2 (tr) 1997-03-21
EP0750444A1 (de) 1996-12-27
SI0750444T2 (sl) 2006-08-31
ES2169175T5 (es) 2006-11-16

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