EP0520353A1 - Pare-brise chauffé électriquement - Google Patents

Pare-brise chauffé électriquement Download PDF

Info

Publication number
EP0520353A1
EP0520353A1 EP92110478A EP92110478A EP0520353A1 EP 0520353 A1 EP0520353 A1 EP 0520353A1 EP 92110478 A EP92110478 A EP 92110478A EP 92110478 A EP92110478 A EP 92110478A EP 0520353 A1 EP0520353 A1 EP 0520353A1
Authority
EP
European Patent Office
Prior art keywords
conductor
pane
heating
conductor tracks
viewing window
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
EP92110478A
Other languages
German (de)
English (en)
Other versions
EP0520353B1 (fr
Inventor
Jost Dipl.-Ing. Welteroth
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.)
Braas GmbH
Original Assignee
Braas 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 Braas GmbH filed Critical Braas GmbH
Publication of EP0520353A1 publication Critical patent/EP0520353A1/fr
Application granted granted Critical
Publication of EP0520353B1 publication Critical patent/EP0520353B1/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
    • H05B3/84—Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields
    • H05B3/86—Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields the heating conductors being embedded in the transparent or reflecting material

Definitions

  • the invention relates to an electrically heatable viewing pane, each having a lower pane consisting of identical transparent plastic and an upper pane between which a flat electrical heating conductor is arranged, each of which has a conductor track containing copper in opposite edge sections.
  • Such viewing windows are preferably used for motor vehicles, in particular for rear windows.
  • the lens can be heated by means of the electric heater to prevent fogging or icing of the surfaces.
  • Laminated transparent panes with heating wires are known from the British patent specification GB-P 972 453, in which the heating wires are arranged in a plastic intermediate layer between a lower and an upper pane.
  • the panes are usually glass panes which contain an intermediate layer made of plastic.
  • other materials such as polymethyl methacrylate plastic (PMMA) can also be used.
  • PMMA is a hard plastic.
  • Vinyl-butyl-aldehyde resin, in which the heating wires and conductor tracks are embedded, is recommended as the material for the intermediate layer.
  • the heating conductor must rest on the flat surface of a disk made of relatively hard material and that the heating conductor is embedded in the adjacent layer, the material of which, at least during manufacture, must be relatively soft around the heating wires to be able to record.
  • German patent application DE-A 20 30 204 describes a method for applying metal threads to flat bodies, metal threads being connected to an electrically insulating support structure to form a flat component, and this is applied as a layer to the flat body.
  • metal threads being connected to an electrically insulating support structure to form a flat component, and this is applied as a layer to the flat body.
  • These are primarily heated glass panes.
  • a film, a woven fabric, knitted fabric, knitted fabric or the like made of insulating material is used as the insulating support structure, and metal threads are embroidered, sewn or stitched onto this film or the like to produce the flat component.
  • the flat component is connected with a plastic film and this is applied to the flat body.
  • the flat component is arranged as a heat conductor system between two glass panes.
  • the object of the present invention is to provide an economically producible flexible, heatable, streak-free viewing window which can be used in particular as a rear window in convertible passenger cars.
  • the rear window of a convertible is folded parallel to its longitudinal axis at least once, in some models also two or more times Radius is in the range of less than 20 mm. So far, it was not possible to produce electrically heated rear windows for such vehicle types, and one had to make do with an elaborate arrangement of ventilation ducts in the automobile floor pan or an additional heating fan.
  • the lower disk and the upper disk are made of soft polyvinyl chloride with a thickness of less than 1 mm, that the heating conductor is designed as a fabric with a mesh size of less than 5 mm, that the conductor tracks on the Both longitudinal edges of the heating conductor are arranged, and that the conductor tracks to the lower pane and to the upper pane are covered with a cover film made of plastic which is chemically resistant to the material of the conductor tracks.
  • the lower cover film, the correspondingly cut heating conductor and the upper cover film are placed on the lower window and, after the upper window has been applied, laminated in a heating and cooling process. This creates a permanent, transparent, streak-free connection between the two plastic washers while simultaneously fixing the heating conductor.
  • the lens can be produced in a single process step.
  • the power supply via conductor tracks ensures an even distribution of the heating power over the entire visible surface, so that the plastic used for the panes is not heated above 70 ° C.
  • the conductor tracks are advantageously arranged opposite one another on both longitudinal edges, but can also be arranged on both side edges.
  • a reaction of the material of the conductor tracks with the material of the disks is prevented by the introduction of the cover film. If this cover film is colored, For example, black, and extends over the entire edge region of the lens, a border of the lens is achieved, as is currently common on glass panes.
  • the viewing pane according to the invention has almost the same mechanical properties as the previously unheatable panes if the thickness of the lower pane consisting of soft polyvinyl chloride and the upper pane are each about 0.5 mm.
  • the heating conductor is designed as a fabric, on the two longitudinal edges of which wires with high electrical conductivity are woven in as warp-traversing conductors.
  • the conductor tracks preferably run in an approximately horizontal direction when the viewing window is installed.
  • the heating conductor can thus be manufactured as a roll-up fabric strip of any length and is cut to length according to its width before the production of a viewing window.
  • a high conductivity of the conductor tracks on the longitudinal edges of the heating conductor is achieved if their wires are made of copper.
  • the diameter of the conductor wires is preferably larger than that of the heating wires.
  • the thickness of the fabric, including the conductor tracks, is advantageously reduced by rolling so that the conductor tracks are not applied.
  • the conductor tracks are preferably covered with an acrylate film opposite the upper and lower soft polyvinyl chloride disks.
  • the fabric is made of chrome-nickel wire less than 0.5 mm in diameter, preferably 0.05 mm in diameter with a Mesh size of less than 5 mm, preferably 0.5 mm, there is a complete connection of these disks within the mesh when the upper pane is laminated onto the lower pane, so that very good transparency is achieved.
  • Excellent optical and electrical properties of the lens are achieved if the fabric has a different electrical conductivity in the longitudinal direction than in the transverse direction.
  • This can be done, for example, by using wires of different thicknesses, by using wires of different material composition, by arranging wire distances different in the warp and in the weft direction, a fabric with a mesh shape other than the right-angled one, or also by using electrically non-conductive wires that run in particular in the warp direction or Fibers are reached so that the fabric is non-conductive in the longitudinal direction.
  • the resistance of the heating conductor can be increased by interrupting it at least once in the area of the visible surface transversely to the conductor tracks and one of the conductor tracks, so that at least two heating regions are formed. In this way, the heating conductor is divided into two or more resistance groups forming heating regions, each of which is connected to one another in an electrically conductive manner via one of the conductor tracks passing through the edge section.
  • the heating conductor in the area of the visible surface is interrupted several times transversely to the conductor tracks and alternately one of the conductor tracks is at least electrically insulating, so that the individual heating areas are electrically connected in series are switched, the resistance of the entire heating conductor can be easily adapted to the respective operating voltage. If an even number of the areas of the heating conductor are implemented, the electrical connections of the conductor tracks can each be made close to the lower outer edges of the viewing window.
  • the rear window of a convertible is sewn into the material of the roof, so that it cannot be enclosed in a frame. Damage to the conductor tracks or the heating conductor and the occurrence of leakage currents are prevented if an edge area is provided on all sides that extends from the edges of the viewing window and is free of electrical conductors.
  • FIG. 1 the arrangement of the heating conductor 12 on a lower pane 14 made of 0.5 mm thick soft polyvinyl chloride is shown on a viewing pane 10 according to the invention in a first manufacturing step.
  • the heating conductor 12 consists of a fabric 16 of 0.05 mm thick chrome-nickel wires and 0.5 mm mesh size in a square mesh shape.
  • Parallel to the longitudinal edges of the viewing window 10, an upper conductor track 18 and a lower conductor track 20 are woven into the longitudinal edges of the heating conductor 12 from copper wires running in the warp direction of the fabric 16.
  • the fabric 16 of the heating conductor is interrupted twice parallel to the weft direction of the fabric 16 over its entire width, so that three heating areas 22, 24, 26 are formed.
  • the lower conductor track 20 is interrupted between the first heating area 22 and the second heating area 24.
  • the upper conductor track 18 is interrupted between the second heating area 24 and the third heating area 26.
  • the three heating areas 22, 24, 26 are electrically connected in series with one another via the continuous conductor track.
  • An approximately 2 cm wide edge region 28 extending on all sides from the edges of the viewing window 10 is free of electrical conductors.
  • the upper conductor track 18 has in the third heating area 26 towards the edge a short upper extension 30, to which a conventional connection element, not shown in the drawing, is attached.
  • a corresponding lower extension 32 is provided on the lower conductor track 20 in the area of the first heating area 22.
  • the viewing pane 10 according to the invention is shown in the finished state, an upper pane 15 made of 0.5 mm thick soft polyvinyl chloride being laminated onto the lower pane 14 and the heating conductor 12.
  • the edge area 28 including the conductor tracks 18, 20 is covered with a cover film 34, which is shown colored in the left part of FIG. 2.

Landscapes

  • Surface Heating Bodies (AREA)
  • Resistance Heating (AREA)
EP92110478A 1991-06-26 1992-06-22 Pare-brise chauffé électriquement Expired - Lifetime EP0520353B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4121102 1991-06-26
DE4121102A DE4121102A1 (de) 1991-06-26 1991-06-26 Elektrisch beheizbare sichtscheibe

Publications (2)

Publication Number Publication Date
EP0520353A1 true EP0520353A1 (fr) 1992-12-30
EP0520353B1 EP0520353B1 (fr) 1995-07-05

Family

ID=6434789

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92110478A Expired - Lifetime EP0520353B1 (fr) 1991-06-26 1992-06-22 Pare-brise chauffé électriquement

Country Status (4)

Country Link
EP (1) EP0520353B1 (fr)
JP (1) JPH081827B2 (fr)
DE (2) DE4121102A1 (fr)
ES (1) ES2075542T3 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4301789A1 (de) * 1993-01-23 1994-07-28 Ver Glaswerke Gmbh Elektrisch beheizbare Glasscheibe
US5824993A (en) * 1995-05-04 1998-10-20 Ford Motor Company Arrangement for heating an automobile glazing unit
US6084502A (en) * 1996-03-11 2000-07-04 Matsushita Electric Industrial Co., Ltd. Resistor and method of making the same
EP0992381A3 (fr) * 1998-10-08 2001-09-05 Wilhelm Karmann GmbH Fenêtre arrière et sa fixation à la capote d'une voiture cabriolet
EP2265086A1 (fr) * 2008-04-11 2010-12-22 FUJIFILM Corporation Corps chauffant

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19819900A1 (de) * 1998-05-05 1999-11-11 Thermal Quarz Schmelze Gmbh Infrarotstrahlerelement
JP3524521B2 (ja) * 2001-07-03 2004-05-10 本田技研工業株式会社 コンバーチブルトップ用リヤーガラスにおける通線保護ケース構造
WO2009125854A1 (fr) * 2008-04-11 2009-10-15 富士フイルム株式会社 Couvercle frontal d’accessoire d’éclairage pour véhicule, procédé de fabrication du couvercle frontal et structure chauffante électrique
JP6123625B2 (ja) * 2013-10-08 2017-05-10 株式会社豊田自動織機 ウインドウ用面状発熱体および車両用窓
JP6759764B2 (ja) * 2016-06-30 2020-09-23 大日本印刷株式会社 通電加熱パネル、及び乗物
JP2019160800A (ja) * 2019-04-26 2019-09-19 大日本印刷株式会社 加熱電極装置、通電加熱ガラス

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1258014A (fr) * 1968-11-19 1971-12-22
DE2030204A1 (de) * 1970-06-19 1971-12-23 Breitner W Verfahren zum Aufbringen von Metallfaden auf flächige Körper
GB2091528A (en) * 1981-01-14 1982-07-28 Boussois Sa Heatable Panels
FR2508267A1 (fr) * 1981-06-19 1982-12-24 Saint Gobain Vitrage Procede pour monter un vitrage dans la baie d'une carrosserie ou pour l'en demonter et vitrage pour la realisation de ce procede
FR2633880A1 (fr) * 1989-07-05 1990-01-12 Asc Inc Lunette arriere composite chauffante, notamment pour automobiles decapotables

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE900119C (de) * 1941-04-04 1953-12-21 Walther Bethge Verfahren zur Herstellung elektrisch heizbarer Anordnungen, insbesondere Heizfolien, fuer Kochgeraete u. dgl.
BE634939A (fr) * 1962-07-16 1900-01-01
BE789359A (fr) * 1971-09-28 1973-03-27 Saint Gobain Vitrage a chauffage electrique
GB8431894D0 (en) * 1984-12-18 1985-01-30 Pilkington Brothers Plc Laminated windows for vehicles
DE4019357C1 (en) * 1990-06-18 1991-08-01 G. Bopp & Co Ag, Zuerich, Ch Flexible, electrically heatable, transparent panel - has heating grid embedded in sheet of thermoplastic material suitable for rear window of convertible car

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1258014A (fr) * 1968-11-19 1971-12-22
DE2030204A1 (de) * 1970-06-19 1971-12-23 Breitner W Verfahren zum Aufbringen von Metallfaden auf flächige Körper
GB2091528A (en) * 1981-01-14 1982-07-28 Boussois Sa Heatable Panels
FR2508267A1 (fr) * 1981-06-19 1982-12-24 Saint Gobain Vitrage Procede pour monter un vitrage dans la baie d'une carrosserie ou pour l'en demonter et vitrage pour la realisation de ce procede
FR2633880A1 (fr) * 1989-07-05 1990-01-12 Asc Inc Lunette arriere composite chauffante, notamment pour automobiles decapotables

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4301789A1 (de) * 1993-01-23 1994-07-28 Ver Glaswerke Gmbh Elektrisch beheizbare Glasscheibe
US5824993A (en) * 1995-05-04 1998-10-20 Ford Motor Company Arrangement for heating an automobile glazing unit
US6084502A (en) * 1996-03-11 2000-07-04 Matsushita Electric Industrial Co., Ltd. Resistor and method of making the same
EP0992381A3 (fr) * 1998-10-08 2001-09-05 Wilhelm Karmann GmbH Fenêtre arrière et sa fixation à la capote d'une voiture cabriolet
EP2265086A1 (fr) * 2008-04-11 2010-12-22 FUJIFILM Corporation Corps chauffant
EP2265086A4 (fr) * 2008-04-11 2013-11-13 Fujifilm Corp Corps chauffant

Also Published As

Publication number Publication date
DE59202793D1 (de) 1995-08-10
JPH081827B2 (ja) 1996-01-10
DE4121102A1 (de) 1993-01-07
JPH05205859A (ja) 1993-08-13
ES2075542T3 (es) 1995-10-01
EP0520353B1 (fr) 1995-07-05

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