EP3220716A1 - Transparente fensterscheibe mit elektrischer heizschicht - Google Patents

Transparente fensterscheibe mit elektrischer heizschicht Download PDF

Info

Publication number
EP3220716A1
EP3220716A1 EP16160226.3A EP16160226A EP3220716A1 EP 3220716 A1 EP3220716 A1 EP 3220716A1 EP 16160226 A EP16160226 A EP 16160226A EP 3220716 A1 EP3220716 A1 EP 3220716A1
Authority
EP
European Patent Office
Prior art keywords
conducting
window pane
heating layer
transparent window
main
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.)
Withdrawn
Application number
EP16160226.3A
Other languages
English (en)
French (fr)
Inventor
Valentin SCHULZ
Stephan GILLESSEN
Wolfgang Andreas Nositschka
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.)
Saint Gobain Glass France SAS
Compagnie de Saint Gobain SA
Original Assignee
Saint Gobain Glass France SAS
Compagnie de Saint Gobain SA
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 Saint Gobain Glass France SAS, Compagnie de Saint Gobain SA filed Critical Saint Gobain Glass France SAS
Priority to EP16160226.3A priority Critical patent/EP3220716A1/de
Priority to CN201780000589.7A priority patent/CN108141918A/zh
Priority to BR112018016549A priority patent/BR112018016549A2/pt
Priority to CA3015133A priority patent/CA3015133A1/en
Priority to PCT/EP2017/055705 priority patent/WO2017157795A1/en
Publication of EP3220716A1 publication Critical patent/EP3220716A1/de
Withdrawn legal-status Critical Current

Links

Images

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
    • 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
    • H05B2203/002—Heaters using a particular layout for the resistive material or resistive elements
    • H05B2203/007—Heaters using a particular layout for the resistive material or resistive elements using multiple electrically connected resistive elements or resistive zones
    • 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
    • H05B2203/011—Heaters using laterally extending conductive material as connecting means
    • 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
    • H05B2203/013—Heaters using resistive films or coatings
    • 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
    • H05B2203/031—Heaters specially adapted for heating the windscreen wiper area

Definitions

  • the present invention is in the field of pane technology and relates to a transparent window pane having an electrical heating layer.
  • Transparent window panes having an electrical heating layer are well-known per se and have already been described many times in the patent literature. In motor vehicles, they are frequently used as windshields since the central visual field must, by law, have no substantial vision restrictions. By means of the heat generated by the heating layer, condensed moisture, ice, and snow can be removed in a short time.
  • the heating current is usually introduced into the heating layer by at least one pair of strip- or band-shaped electrodes. These electrodes should introduce the heating current into the heating layer as uniformly as possible and distribute it widely.
  • the electrical sheet resistance of the heating layer is relatively high and may reach several ohms per square. In order to nevertheless obtain adequate heating output, the supply voltage must be correspondingly high, but, for example, in motor vehicles, standardly, only an onboard voltage of 12 to 24 volts is available. Since the resistance of the heating layer increases with the length of the current path of the heating current, the bus bars of opposite polarity should have the least possible distance between them. In the case of motor vehicle panes, which are usually wider than they are high, the bus bars are, consequently, disposed along the two longer edges of the panes such that the heating current can flow via the shorter path of the height of the pane. This design results, however, in the fact that the region of a resting or parked position of windshield wipers provided to wipe the pane customarily lies outside the heating field such that no adequate heating output remains present there and the wipers can freeze in place.
  • the object of the present invention consists in further improving transparent panes with an electrical heating layer, by reducing their energy consumption.
  • a transparent window pane according to the present invention comprises:
  • the transparent window pane according to the invention is for example a pane exhibiting - on at least part of its surface - a transmission in the visible range higher than 70%.
  • the main and additional heating layers are both electrically heatable and can be electrically connected to a power source.
  • the first and second electrodes in the main heating part serve to introduce a heating current into the main heating layer and are electrically connected directly to the main heating layer such that after application of a supply voltage to the electrodes, a heating current flows over a heating field formed by the heating layer.
  • External connectors may be provided for connection of the first and second electrodes with the two terminals of the main power source.
  • the first electrode is located adjacent the upper edge of the pane and the second electrode, adjacent the lower edge of the pane such that the two electrodes run in the transverse direction of the pane or the motor vehicle.
  • the first and second electrodes are generally designed in the form of strip or band electrodes (in particular "bus bars”, notably silver busbars or busbars of any other conductive material, for example made by printing such as ink jet printing or silk screen printing etc.), in order to introduce the heating current widely distributed into the heating layer.
  • bus bars notably silver busbars or busbars of any other conductive material, for example made by printing such as ink jet printing or silk screen printing etc.
  • the first and second electrodes may be electrically connected directly over their full strip length to the main heating layer.
  • the two electrodes may be applied completely on the heating layer, for example, by screen printing, or only in a connection section extending along the full length of the electrode.
  • the electrodes have preferably, in each case, a contact region that extends over the complete strip length and provides direct electrical contact with the heating layer.
  • the sheet resistance of the main and/or additional heating layer is, for example, in the range from 0,1 to 200 ohm/square, more particularly from 0,5 to 50 ohm/square.
  • the window pane according to the invention further comprises an additonal heating layer located in an additional heating part.
  • the additional heating layer is electrically isolated from the main heating layer. As a consequence, the additional heating part cannot be directly heated by the first and second electrodes located in the main heating part.
  • the main heating layer and the additional heating layer are electrically separated from each other by a heating layer-free pane zone.
  • This separation zone may be formed by removal of part of a heating layer (by laser cut for example) covering both the main and additional heating part or by masking during application of the said layer, or any other adapted method. Laser cut is particularly easy, fast and economic.
  • the additional heating part can be the region of a resting or parked position of windshield wipers provided to wipe the pane.
  • a conducting part which is directly connected to the additional heating layer.
  • the conducting part is interrupted by interruption zones. That is, the conducting part is formed of a plurality of conducting elements placed one next to the other, but physically separated from each other by said interruption zones.
  • Zones carrying the conducting elements are called hereafter "conducting zones”.
  • the current flows mainly in said conducting elements, whereby the additional heating layer in said conducting zones is not heated.
  • the conducting elements themselves do not - or only in a negligible amount - contribute to the electrical heating.
  • the conducting element generally has a resistance which is significantly lower than the resistance of the additional heating layer.
  • the conducting zones are non- or low heated zones.
  • the interruption zones separating two conducting elements are heated, due to the relatively higher resistance of the additional heating layer and the absence of conducting element.
  • the window pane is thus provided, in the additional heating part, with a row of alternate heated zones (corresponding to the interruption zones) and non-heated or low-heated zones (corresponding to the conducting zones carrying the conducting elements).
  • window pane can be advantageous in particular in cases where some areas of the window pane are, in use, heated by an external system, for example a hot air stream supplied by an air conditional system.
  • an external system for example a hot air stream supplied by an air conditional system.
  • air swept zones can be taken out from active heating.
  • an optimized heating power per surface unit can be obtained in the interruption zones compared with the prior art systems, in which a part of the heating power was wasted to parts of the window pane which did not need extra heating.
  • the heating effect in all interruption zones can be made homogeneous.
  • the conducting elements and the interruption zones are alternated in a row extending in a transverse direction of the window pane.
  • the window pane has two edges, in particular long-side edges, extending in the said transverse direction.
  • the first and second electrodes typically run in said transverse direction.
  • the conducting part is advantageously configured such that the conducting elements and the interruption zones are alternated along at least a part of one of said edges of the window pane, preferably along at least 50% of the entire length of said edge, still more preferably along at least 70% of the entire length of said edge, even more preferably 95%.
  • this edge is usually the long-side lower edge of the window pane.
  • the conducting elements may be formed of conducting tracks or wires.
  • the conducting elements may be formed of printed tracks or wires.
  • the conducting elements may be printed in the same printing step as first and second electrodes, this allowing saving process steps (wiring).
  • a conducting element may be formed of copper, tungsten, silver, gold, or any other appropriate material.
  • the conducting tracks or wires have a thickness (measured in a direction orthogonal to the main surfaces of the window pane) of between 1 and 100 ⁇ m, more preferably between 5 and 15 ⁇ m and a width (measured in a direction tangential to the main surfaces of the window pane) of between 0,1 and 10 mm, more preferably between 0,5 and 5 mm.
  • the conducting part is an interrupted line comprising a plurality of line parts.
  • each conducting element comprises at least one line part, generally extending (at least in part) in the transverse direction of the window pane.
  • Each conducting element could also comprise two or more parallel line parts extending in the transverse direction of the window pane.
  • each conducting element further comprises at least one collecting end part running transversally to said line part at each end of the line part facing an adjacent conducting element.
  • the collecting end part of a first conducting element so faces the collecting end part of an adjacent second conducting element, an interruption zone being delimited by facing collecting end parts of two adjacent conducting elements.
  • the conducting elements of the conducting part are H-shaped or T-shaped.
  • each conducting element located between two interruption zones is H-shaped.
  • the conducting part comprises two T-shaped conducting elements at its ends.
  • each conducting element is directly contacting at least one edge of the additional heating layer, notably an edge delimiting a heating-layer-free edge of the window pane and/or an edge delimiting the heating-layer-free separating part between the main heating layer and the additional heating layer.
  • the length of each connecting element located between two interruption zones is at least 10%, preferably at least 50%, of the length of any of the said adjacent interruption zone.
  • the transparent pane comprises at least two interruption zones, preferably at least five interruption zones, preferably distributed in the transverse direction of the pane.
  • the conducting part has only two (a first and a second physical) connection points (terminals) physically connected to the main power source or another power source.
  • one end conducting element (end connection section) of the conducting part is physically connected to the positive terminal of the power source and an opposite end conducting element (end connection section) is physically connected to the negative terminal of the power source.
  • the intermediate conducting elements located between interruption zones have no physical connection with the positive or negative terminals of the power source.
  • the conducting part is adapted to be electrically connected to the main power source, to which the main heating layer part is connected.
  • the conducting part is electrically connected to the first and second electrodes of the main heating part, in an electrical parallel circuit with respect to the main heating field.
  • the conducting part may directly contact at least one of the first and the second electrode.
  • end connection sections of the conducting part may sometimes be disposed, at least in some regions, in physical contact with the main heating layer, with at least the regions of said sections disposed in physical contact with the heating layer provided with a sheathing electrically insulating against the environment.
  • sheathing can, for example, be a polyurethane or polyimide coating.
  • the end connection sections are disposed at least partially in a heating layer-free or heating field-free edge zone of the pane. In that particular case, it is possible to dispense with an insulating sheathing of the end connection sections.
  • the conducting part may thus be fed with the same supply voltage as the main heating layer, such that, advantageously, it is possible to do without separate external connectors.
  • the conducting part may also be advantageous to connect the conducting part with separate external connectors and preferably with a separate power source, for example to avoid connecting sections on the transparent pane or when the conducting part should be supplied with higher or lower voltage.
  • the transparent window pane comprises two sheets bonded to each other by an adhesive layer, wherein the heating layer is situated on at least one surface of the two sheets and/or on a surface of a carrier arranged between the two sheets, and wherein the conducting part is disposed between the two sheets.
  • the two sheets may be made of glass or of a non-glass material, for example, plastic.
  • the adhesive layer preferably comprises a thermoplastic material, for example polyvinyl butyral (PVB), ethylene vinyl acetate (EVA), polyurethane (PU) and/or polyethylene terephthalate (PET), and may be composed of one or several thermoplastic films.
  • PVB polyvinyl butyral
  • EVA ethylene vinyl acetate
  • PU polyurethane
  • PET polyethylene terephthalate
  • the present invention is further directed to the use of a transparent pane as described above as a functional individual piece in particular in means of transportation on land, in the air, or on water, in particular in motor vehicles, for example, as a windshield or rear window.
  • the invention concerns, in particular, an assembly comprising a transparent window pane as defined hereabove, and air supplying means, the air supplying means being configured to supply air between interruption zones of the window pane.
  • the air supplying means comprise air ducts adapted to be fed with air, notably by an air conditioning system.
  • the transparent window pane and the air ducts are then assembled such that each air duct is adapted to supply air between interruption zones of the window pane.
  • the assembly more specifically comprises an instrument panel, in particular an instrument panel of a vehicle, provided with the plurality of air ducts.
  • the present invention further is directed to an element, in particular a vehicle, comprising such an assembly and an air conditioning system feeding the air ducts.
  • a pane according to a first embodiment of the invention is embodied in the form of a motor vehicle windshield referred to as a whole by the reference 1.
  • the windshield 1 is a composite pane, which (as can be discerned from the interposed cross-sectional depiction) comprises a rigid outer sheet 2 and a rigid inner sheet 3, bonded to each other by means of a thermoplastic adhesive layer 4, here, for example, a polyvinyl butyral film (PVB), ethylene vinyl acetate film (EVA), polyurethane film (PU) and/or polyethylene terephthalate (PET).
  • PVB polyvinyl butyral film
  • EVA ethylene vinyl acetate film
  • PU polyurethane film
  • PET polyethylene terephthalate
  • the two sheets 2, 3 are approximately the same size, have a roughly trapezoidal curved contour, and are, for example, made of glass, or of a non-glass material, such as plastic. For an application other than a windshield, it is possible to make the two individual sheets 2, 3 from a flexible material.
  • the contour of the windshield 1 is defined by an edge of the pane 5, which is, corresponding to the trapezoidal shape, composed of two long side edges 5a, 5a' (bottom and top in the installation position), and two short side edges 5b, 5b' (left and right in the installation position).
  • a transverse direction X of the window pane is generally defined as a direction orthogonal to a plane of symmetry of the window pane, and generally corresponding to the direction of the long side edges 5a, 5a'.
  • the window pane comprises a main heating layer 6 located in a main heating part 7 and an additional heating layer 8 located in an additional heating part 9 thereof. Both heating layers serve to electrically heat the windshield 1.
  • the main and additional heating layers 6, 8 together cover substantially the entire surface of the pane 1, with a circumferential edge strip 10 on all sides of the pane not coated such that a heating layer edge is set back inward relative to the edge of the pane 5 from a distance r (see figure 3 - constant or variable along the edge 5 of the pane) comprised for example between 2 and 50 mm.
  • This provides electrical insulation of the heating layers 6, 8 against the outside and protection of the heating layers against corrosion penetrating from the edge 5 of the pane.
  • the main and additional heating layers 6, 8 are for example deposited on the side of the inner sheet 3 bonded to the adhesive layer 4.
  • the main and additional heating layers 6, 8 are deposited as one and the same heating layer.
  • the said single layer may then be separated in two parts by laser or mechanical grinding process, as will be explained in more detail hereunder.
  • the heating layers may comprise, in a manner known per se, a layer sequence with at least one electrically conductive metallic sublayer, preferably silver, and, optionally, other sublayers (metallic or not), such as anti-reflection layers and blocker layers.
  • the layer sequence advantageously has high thermal stability such that it withstands, without damage, the temperatures of typically more than 600° C necessary for the bending of glass panes; however, layer sequences with low thermal stability can also be provided.
  • the heating layer may be applied on a PET foil.
  • the main and additional heating layers are, for example, applied by sputtering (magnetron cathode sputtering).
  • the sheet resistance of the heating layers 6, 8 is, for example, in the range from 0,5 to 50 ohm.
  • the main heating layer 6 is intended to heat the upper pane region, corresponding to the region of the pane intended to be placed in the visual field of a driver or operator.
  • the main heating layer 6 is electrically connected directly to a (top) first electrode - here in the form of a first bus bar 11 - and to a (bottom) second electrode - here in the form of a second bus bar 12.
  • Both bus bars 11, 12 are band- or strip-shaped and serve as connection electrodes for the broad introduction of a supply current into the main heating layer 6.
  • the bus bars 11, 12 are disposed on the main heating layer, with the first bus bar 11 extending along the upper long-side edge of the pane 5a' and the second bus bar 12 extending along the lower long-side edge of the pane 5a.
  • the two bus bars 11, 12 are thus electrically connected directly to the main heating layer 6 along their full strip length and make contact with the main heating layer, in each case, in a contact region situated on their underside.
  • the two bus bars 11, 12 run exclusively along the long-side edges 5a, 5a' of the pane, but not along the short edges 5b, 5b' of the pane.
  • the two bus bars 11, 12 are made of one and the same material and can, for example, be produced by printing a paste on the main heating layer, for example, by screen printing. Alternatively, it would also be possible to make the bus bars 11, 12 from narrow metal foil strips, for example, of copper or aluminum. These can, for example, be fixed on the adhesive layer 4 and be disposed on the main heating layer 6 at the time of the bonding of the outer and inner sheets 2, 3. An electrical contact can be ensured through the action of heat and pressure at the time of the bonding of the individual panes.
  • a first connection lead 13 that is implemented as a flat ribbon cable (e.g., narrow metal foil) is electrically connected in direct contact to the first bus bar 11, and is connected to a first terminal of a main power source to make a supply voltage available.
  • the first connection lead 13 is disposed roughly in the center of the upper long-side edge of the pane 5a' perpendicular to the first bus bar 11.
  • Two second connection leads 14, 14' are electrically connected in direct contact with the second bus bar 12, and are connected to another terminal of the main power source.
  • the two second connection leads 14, 14' are disposed at a distance on both sides of the central region of the pane.
  • the lower pane region which is no longer part of the visual field but corresponds to the region of a resting or parked position of windshield wipers provided to wipe the pane, is heated by the additional heating layer 8.
  • the main heating layer 6 and the additional heating layer 8 are electrically isolated, in particular galvanically isolated, for example by a heating-layer-free separating zone 16 (see figure 2 or 3 ).
  • the separation zone 16 may be formed by removal of the heating layer either by laser or by a mechanical grinding process, or by masking during application of the layer.
  • the separation zone 16 may have a width d of for example 10 ⁇ m to 2 mm in case of laser decoating or between 1 mm and 30mm in case of a mechanical grinding process.
  • the additional heating layer 8 forms a strip extending in the transverse direction X, almost on the entire length of the window pane 1 in the said transverse direction. It is delimited by the heating-layer-free separating zone 16 on one side and by the circumferential edge strip 10 on the other side.
  • the additional heating layer 8 has a width g measured perpendicularly to the transverse direction typically comprised between 10mm and 250mm, depending notably on the glass geometry.
  • the additional heating layer 8 cannot be flowed through by the heating current flowing in the main heating part 7 and is not directly heatable through the two bus bars 11, 12.
  • the additional heating part 9 In order to heat the additional heating part 9, the latter is provided with a conducting part 20.
  • the conducting part 20 has globally the form of an interrupted line, in particular of a regularly interrupted line, extending in the transverse direction of the window pane, from the vicinity of left short side edge 5b to the vicinity of right short side edge 5b'.
  • the conducting part extends along an edge (generally a lower edge) of the window pane, on at least 50%, preferably 80% of the length of said edge.
  • the conducting part 20 has only two connection points with which it is (physically) connected to a power source for voltage supply, as will be described in more details hereafter.
  • conducting part 20 is a discontinuous line interrupted by interruption zones 21. It is so formed of a plurality of conducting elements 22 physically separated from each other by said interruption zones 21.
  • Each conducting element 22 is electrically connected to the additional electrical heating layer 8.
  • conducting zones 50 the zones of the additional heating part 9 carrying the conducting elements 22 are referred to as conducting zones 50.
  • the conducting part 20 is advantageously formed of printed conducting tracks or wires. These tracks/wires are formed by applying electrically conductive paste on the inner sheet 3 in the same printing process, in particular screen printing process, as the first and second bus bars 11, 12. In other words, the conducting part 20 is directly printed on the additional heating layer 8. It is so into direct contact with said layer 8 and electrically connected thereto.
  • the tracks/wires have, for example, a width b between 0,1 and 10 mm and a thickness e between 1 and 100 ⁇ m.
  • the conducting elements 22 forming the conducting part 20 have a resistance which is low, such that they have almost no heating output with the customary onboard voltage of a motor vehicle of 12 to 24 V.
  • the conducting elements may be formed of the printed Ag tracks having a conductivity of 43.50E6 S/m with the additional heating layer having a conductivity between 25.0E4 S/m and 1.43e6 S/m (this example being provided for the sake of illustration only, and being not limiting in any way).
  • the conducting part 20 comprises a first end connecting section (end conducting element) 23, a second end connecting section (end conducting element) 24, and a plurality of intermediate conducting elements 25, all being separated by interruption zones 21.
  • the first end conducting element 23 of conducting part 20 comprises a line part 26 extending partially along the heating-layer-free short edge 5b of the window pane 1.
  • One connecting end 23a of said line part is in direct contact with the first bus bar 11, so forming a first connection point of the conducting part 20 for voltage supply.
  • the second end conducting element 24 comprises a line part 26 extending in the vicinity of the opposite short edge 5b', with one connecting end 24a thereof directly contacting the second bus bar 12, so forming a second connection point of the conducting part 20 for voltage supply.
  • Each intermediate conducting element 25 also comprises a line part 26, straight or slightly curved, extending in the transverse direction and along the lower long-side edge 5a of the pane.
  • each intermediate connecting element is at least 10 %, preferably at least 50%, of the length L1 of any of the adjacent interruption zones 21 (see figure 2 ).
  • All line parts 26 of the conducting elements 22 so form a discontinuous conducting line along the lower edge 5a.
  • each conducting element 22 further comprises a (strip-shaped) collecting end part 27 running transversely to its corresponding line part 26, at at least one end of the said line part 26.
  • the first end section comprises at its end opposite to the connecting end 23a, a transversally extending collecting end part 27, facing an adjacent intermediate conducting element 25.
  • the second end section comprises at its end opposite to the connecting end 24a, a transversally extending collecting end part 27, facing an adjacent intermediate conducting element 25.
  • Each intermediate conducting elements 25 also comprises a collecting end part 27 orthogonal to its line part 26, at each end.
  • all conducting elements are arranged such that the strip-shaped collecting end part 27 of a first conducting element 22 faces the strip-shaped collecting end part 27 of an adjacent second conducting element 22 in the transverse direction X of the window pane.
  • An interruption zone 21 is so delimited by the facing strip-shaped collecting end parts 27 of two adjacent conducting elements 22 forming the conducting part 20.
  • the transparent window pane comprises one conducting part 20 which has, between its connection points 23a, 24a, seven interruption zones 40 regularly distributed along the long-side lower edge 5a of the window pane 1, symmetrically with respect to a mid-plane of the pane.
  • each conducting element 22 is electrically connected to the additional electrical heating layer.
  • each conducting element is directly contacting the heating layer, notably through its collecting end parts.
  • the left collecting end part 27a thereof forms an electrode contacting the additional heating layer 8 and collecting the current flowing from the adjacent conducting element through said heating layer in interruption zone 21a.
  • the collected current then flows through the line part 26 of the conducting element 25A to the right collecting end part 27b.
  • the right collecting end part 27b forms an electrode contacting the heating layer 8 and serves to introduce the current flowing through the line part 26 into the additional heating layer 8 in the following interruption zone 21b.
  • the current is then again collected by left collecting end part 27a of adjacent conducting element 25B and so on.
  • the conducting elements 22 Because the resistance of the conducting elements 22 is negligible compared to that of the additional heating layer 8, in the conducting zones 50, the current runs firstly in said conducting elements 22 and not through the additional heating layer 8. On the other hand, the conducting elements 22 do not - or only insignificantly- heat up. Therefore, the conducting zones 50 are not or low - electrically heated.
  • the lengths of all interruption zones 21 are equal.
  • the electrical potential in all conducting elements 22 being the same, the heating effect in all interruption zones 21 is homogeneous.
  • Figure 4 shows the heating power distribution in the additional heating part of the window pane of figure 1 , with an electrical potential of 14 V applied to the conducting part 20.
  • the specific heating power measured in the interruption zones 21 is between 350 and 650 W/m 2 .
  • the calculated average specific heating power in these zones is 478.1 W/m 2 .
  • the average specific heating power in the conducting zones 50 located on either side of the interruption zones 21 is close to 0.
  • Figure 5 shows the outer glass surface temperature distribution in the additional heating part 9 of the window pane of figure 1 , in the same conditions.
  • the simulation shows a difference in the measured temperature of 12 to 16°C between the interruption zones 21 and the conducting zones 50.
  • each collecting end part 27 of each conducting element 22 runs until the edge of the additional heating layer delimiting the separation part 16. This allows the current to flow directly and straight in the interruption zone from one collecting end part 27 to a facing one, without much deviating from a rectilinear trajectory orthogonal to the said end parts.
  • each collecting part 27 remains distant from the circumferential edge strip 10.
  • each conducting element 22 may directly contact both heating-layer-free zones 16, 10 located on each side of the additional heating layer 8. As shown in the figure, each conducting element 22 extends on the entire width of the additional heating part 9, in a direction orthogonal to the transverse direction X. In particular, each collecting part 26 of each conducting element 22 contacts, at one end, the separation part 16, and, at its opposite end, the circumferential edge strip 10.
  • each interruption zone 21 is so delimited exclusively by the two heating-zone-free parts and two conducting elements (in particular the strip-shaped end parts of two adjacent conducting elements).
  • the conducting zones 50 correspond to areas of the window pane which are heated by another external system, and which do not need extra electrical heating.
  • figure 7 illustrates an assembly 60 according to an embodiment of the present invention, comprising a transparent window pane 1 of the type defined here above, and an instrument panel 70 of a vehicle.
  • the instrument panel comprises air ducts 72 adapted to be fed with hot air by an air conditioning system (not shown in the figure).
  • the transparent window pane 1 and the instrument panel 70 are assembled such that each duct 72 is adapted to supply air to a conducting zone 50 of the window pane 1.
  • the instrument panel 70 may be provided with a number of ducts equal to the number of conducting zones 50 in the window pane, each duct 72 being adapted to supply one respective conducting zone.
  • the hot air provided by the ducts 72 heat the conducting zones 50. These zones do therefore not need any extra heating.
  • This heating is achieved by applying a supply voltage to the connection points 23a, 24a of the conducting part 20: As explained hereabove, current then flows from one conducting element 22 to an adjacent conducting element 22 in each interruption zone 21, through the additional heating layer 8.
EP16160226.3A 2016-03-14 2016-03-14 Transparente fensterscheibe mit elektrischer heizschicht Withdrawn EP3220716A1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP16160226.3A EP3220716A1 (de) 2016-03-14 2016-03-14 Transparente fensterscheibe mit elektrischer heizschicht
CN201780000589.7A CN108141918A (zh) 2016-03-14 2017-03-10 具有电加热层的透明窗玻璃
BR112018016549A BR112018016549A2 (pt) 2016-03-14 2017-03-10 painel de janela transparente com camada de aquecimento elétrico
CA3015133A CA3015133A1 (en) 2016-03-14 2017-03-10 Transparent window pane with electrical heating layer
PCT/EP2017/055705 WO2017157795A1 (en) 2016-03-14 2017-03-10 Transparent window pane with electrical heating layer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16160226.3A EP3220716A1 (de) 2016-03-14 2016-03-14 Transparente fensterscheibe mit elektrischer heizschicht

Publications (1)

Publication Number Publication Date
EP3220716A1 true EP3220716A1 (de) 2017-09-20

Family

ID=55650113

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16160226.3A Withdrawn EP3220716A1 (de) 2016-03-14 2016-03-14 Transparente fensterscheibe mit elektrischer heizschicht

Country Status (5)

Country Link
EP (1) EP3220716A1 (de)
CN (1) CN108141918A (de)
BR (1) BR112018016549A2 (de)
CA (1) CA3015133A1 (de)
WO (1) WO2017157795A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110300468B (zh) * 2019-04-25 2020-06-09 福耀玻璃工业集团股份有限公司 一种汽车边窗镀膜加热玻璃

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0246683A (ja) * 1988-08-05 1990-02-16 Nippon Denso Co Ltd ウインドシールド
WO2003051088A2 (fr) * 2001-12-11 2003-06-19 Saint-Gobain Glass France Vitre chauffante avec un revetement superficiel electriquement conducteur
WO2008104728A2 (fr) 2007-02-23 2008-09-04 Saint-Gobain Glass France Vitre transparente avec un revetement chauffant
WO2011141487A1 (de) * 2010-05-10 2011-11-17 Saint-Gobain Glass France Transparente scheibe mit heizbarer beschichtung, sowie herstellungsverfahren hierfür
WO2016020114A1 (de) * 2014-08-08 2016-02-11 Saint-Gobain Glass France Transparente scheibe mit elektrischer heizschicht, verfahren zu ihrer herstellung und ihre verwendung

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105338672A (zh) * 2015-09-17 2016-02-17 福建省万达汽车玻璃工业有限公司 一种可均匀电加热的汽车夹层玻璃

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0246683A (ja) * 1988-08-05 1990-02-16 Nippon Denso Co Ltd ウインドシールド
WO2003051088A2 (fr) * 2001-12-11 2003-06-19 Saint-Gobain Glass France Vitre chauffante avec un revetement superficiel electriquement conducteur
WO2008104728A2 (fr) 2007-02-23 2008-09-04 Saint-Gobain Glass France Vitre transparente avec un revetement chauffant
WO2011141487A1 (de) * 2010-05-10 2011-11-17 Saint-Gobain Glass France Transparente scheibe mit heizbarer beschichtung, sowie herstellungsverfahren hierfür
WO2016020114A1 (de) * 2014-08-08 2016-02-11 Saint-Gobain Glass France Transparente scheibe mit elektrischer heizschicht, verfahren zu ihrer herstellung und ihre verwendung

Also Published As

Publication number Publication date
CA3015133A1 (en) 2017-09-21
CN108141918A (zh) 2018-06-08
WO2017157795A1 (en) 2017-09-21
BR112018016549A2 (pt) 2018-12-26

Similar Documents

Publication Publication Date Title
JP6266679B2 (ja) 電気加熱層を備える透明な板ガラス、およびそのための製造プロセス
JP5600364B2 (ja) 加熱可能なコーティングを備える透明窓ガラスおよびその製造方法
KR101345050B1 (ko) 전기적으로 광범위하게 가열될 수 있는 투명 물품, 그의 제조 방법, 및 그의 용도
US9596719B2 (en) Composite pane having an electrically heatable coating
KR101493622B1 (ko) 가열성 코팅을 갖는 투명한 창유리
JP6463842B2 (ja) 電気的な加熱層を備えた透明なパネルならびにその製造方法
JP6978940B2 (ja) 加熱可能なガラスパネル
US10660161B2 (en) Transparent pane having an electrical heating layer, method for its production, and its use
US10356851B2 (en) Transparent pane having an electrical heating layer, method for the production thereof, and use thereof
KR101976910B1 (ko) 가열가능 코팅을 갖는 투명 패널
EP3220716A1 (de) Transparente fensterscheibe mit elektrischer heizschicht

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

17P Request for examination filed

Effective date: 20180320

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20191001