EP1033064A1 - Window heater - Google Patents

Window heater

Info

Publication number
EP1033064A1
EP1033064A1 EP98963320A EP98963320A EP1033064A1 EP 1033064 A1 EP1033064 A1 EP 1033064A1 EP 98963320 A EP98963320 A EP 98963320A EP 98963320 A EP98963320 A EP 98963320A EP 1033064 A1 EP1033064 A1 EP 1033064A1
Authority
EP
European Patent Office
Prior art keywords
switching means
semiconductor switching
pane
connection
heater according
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
EP98963320A
Other languages
German (de)
French (fr)
Other versions
EP1033064B1 (en
Inventor
Rainer Topp
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1033064A1 publication Critical patent/EP1033064A1/en
Application granted granted Critical
Publication of EP1033064B1 publication Critical patent/EP1033064B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0227—Applications
    • H05B1/023—Industrial applications
    • H05B1/0236—Industrial applications for vehicles
    • 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
    • H05B2203/016—Heaters using particular 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
    • H05B2203/035—Electrical circuits used in resistive heating apparatus

Definitions

  • the invention relates to a window heater, in particular for heating a window of a motor vehicle, with the features mentioned in the preamble of claim 1.
  • Disc heaters of the generic type are known. These usually have a resistance heating device which is formed by electrical conductors which are arranged in a meandering shape over the pane to be heated. The electrical conductors are applied as thin, flat or linear conductor tracks to a surface of the pane or - in the case of composite panes - integrated into a space between the panes.
  • a heating voltage source usually the motor vehicle battery
  • the resistance heating device is heated as a result of a flowing electrical current, which then heats the pane to be heated.
  • an electrical switching means for connecting the resistance heating device to the heating voltage source which can be activated by an operator of the motor vehicle. Relays are used, for example, as electrical switching means.
  • the disc heater according to the invention with the features mentioned in claim 1 offers the advantage that contacting the resistance heating device with a heating voltage source is possible in a simple and inexpensive manner.
  • the switching means is a semiconductor switching means arranged directly on the pane to be heated, it is advantageously possible to contact the semiconductor switching means available as standard components directly with the resistance heating device on the pane to be heated without the interposition of an adapter housing.
  • the pane to be heated also serves as a carrier for the semiconductor switching means and thus a circuit board for connecting the semiconductor switching means is simulated in a simple manner by appropriate design of the resistance heating device.
  • the semiconductor switching means contains intelligent circuit components, by means of which an automatic temperature detection and control of the resistance heating device is preferably possible.
  • the semiconductor switching means having the intelligent circuits on the pane a direct temperature measurement of the pane to be heated can be carried out and the pane heating can be switched on or off automatically depending on a selectable switching threshold.
  • Figure 1 is a schematic overall view of a window heater;
  • Figure 2 shows the use of a semiconductor switching means in a first embodiment and
  • Figure 3 shows the use of a semiconductor switching means in a second embodiment.
  • FIG. 1 shows a schematic view of a window heater 10 for heating a window 12.
  • the window 12 is, for example, a motor vehicle window, in particular a rear window, a front window or a side window.
  • the disk heater 10 comprises a resistance heating device 14, which is formed by a conductor loop 16 arranged in a meandering manner on the disk 12.
  • the conductor loop 16 forms two connection areas 18 and 20, which are contacted with a switching means 22.
  • the switching means 22 is a power transistor, generally referred to as semiconductor switching means 24.
  • the switching means 22 is connected via connecting lines 26 and 28 to a heating voltage source 30, for example a motor vehicle battery.
  • a control connection line 32 can be acted upon with a control signal for actuating the switching means 22.
  • the semiconductor switching means 24 is arranged directly on the disk 12.
  • the position of the semiconductor switching means 24 is selected so that it on the one hand with the connecting lines 26, 28 and the control line 32 and on the other hand with the connecting lines range 18 and 20 is contactable.
  • One position of the semiconductor switching means is, for example, in a corner region of the pane 12, which on the one hand is relatively protected against possible mechanical stress and on the other hand does not necessarily have to be available for a clear view through the pane 12.
  • the semiconductor switching means 24 changes its switching position, so that the heating voltage source 30 is connected to the conductor loop 16. This results in a flow of a heating current I, which leads to the heating of the conductor loop 16 and thus the disk 12 in a known manner.
  • FIGS. 2a and 3a each show a schematic top view and FIGS. 2b and 3b each show a schematic side view of the connection area.
  • the semiconductor switching means 24 is a standard power transistor known under the trade name TO-220. This has a standard housing 34, within which a silicon chip (not shown in detail) is arranged, which can be controlled via three outer connection contacts 36, 38 and 40.
  • connection contacts 36 and 38 are the switching contacts, while the connection contact 40 is the control contact.
  • the connection contact 36 is connected to the connection line 28, while the connection contact 40 is connected to the control line 32.
  • the connecting contacts 36 and 40 can be bent slightly away from the disk 12, if necessary.
  • a connection between the connecting contacts 36 and 40 and the connecting line 28 or the control line 32 can be made, for example, by a soldered connection or other suitable electrically conductive contacts.
  • the connection contact 38 is connected to a connection lug 42 of the
  • Connection area 20 contacted.
  • connection lug 42 forms an extension, as seen in the plan view shown in FIG. 2, and at the same time serves as an assembly basis for the semiconductor switching means 24.
  • the housing 34 of the semiconductor switching means 24 can be joined, for example, flatly to the connection lug 42.
  • a non-positive connection can be made, for example, by gluing, soldering or other suitable connection techniques.
  • the connection contact 38 is, for example, as again the schematic side view see in Figure 2b shows, angled in the direction of the disc 12 and contacted on a finger-like extension of the terminal lug 42, for example by soldering.
  • connection area 20 of the resistance heating device 14 serves here, in addition to making electrical contact with the semiconductor switching means 24, for mechanically fixing the semiconductor switching means 24 on the disk 12.
  • heat loss from the semiconductor switching means 24 can be absorbed via the connecting lug 42 and transferred to the Disk 12 are removed.
  • an additional, at least local, heat source is available for heating the pane 12.
  • FIGS. 3a and 3b show an embodiment variant in which the semiconductor switching means 24 is formed by a standard power transistor, which is available under the trade name PS-010.
  • the semiconductor switching means 24 is formed by a standard power transistor, which is available under the trade name PS-010.
  • its connection contact 36 is applied to the connection lug 42 of the connection area 20.
  • the connection contact 36 formed here by a plurality of connecting legs is connected to the connection line 28 via an intermediate conductor track 46.
  • the connection contact 40 which is likewise formed here by a plurality of connecting legs, is likewise connected to the control line 32 via an intermediate conductor track 48.
  • the design of the connecting lug 42 or the intermediate conductor tracks 46 and 48 is adapted to the predetermined position of the connecting contacts 36, 38 and 40 of the semiconductor switching means 24.
  • a structuring of the connecting lug 42 or the intermediate conductor tracks 46 and 48 and the connection regions 18 and 20 of the conductor loop 16 can take place simultaneously with the application of the conductor loop 16 to the disk 12.
  • the disk 12 simultaneously serves as a printed circuit board for contacting the semiconductor switching means 24.
  • the semiconductor switching means 24 contain integrated intelligent circuits, by means of which, for example, time control and / or temperature control of the semiconductor switching means 24 is possible.
  • a temperature of the pane 12 can particularly preferably be determined and this can be used as a control variable for switching the semiconductor switching means 24 on and off.
  • selectable threshold values an optimal switching on and off of the window heater 10 can thus be ensured, whereby a load on the heating voltage source 30 formed by the motor vehicle battery is kept to a necessary minimum.
  • the pane 12 for example as a motor vehicle pane, can be prefabricated with a pane heater 10 which is already provided with an integrated switching means 22 and can be used by the end user as a complete structural unit. It is only necessary to make contact with the connecting lines 26 and 28 and the control line 32, which can be implemented, for example, by simple plug connections without additional aids.

Landscapes

  • Air-Conditioning For Vehicles (AREA)
  • Control Of Resistance Heating (AREA)
  • Control Of Non-Electrical Variables (AREA)
  • Control Of Temperature (AREA)

Abstract

The invention relates to a window heater, especially for a motor vehicle, comprising a resistance heating device placed on the window or integrated therein. Said heating device can be connected to a voltage source via terminal contacts and electrical switching means. Said switching means (24) consists of a semi-conductor switching element (24) mounted directly on the window (12) to be heated.

Description

Sc eibenheizungDisc heating
Die Erfindung betrifft eine Scheibenheizung, insbesondere zum Heizen einer Scheibe eines Kraftfahrzeuges, mit den im Oberbegriff des Anspruchs 1 genannten Merkmalen.The invention relates to a window heater, in particular for heating a window of a motor vehicle, with the features mentioned in the preamble of claim 1.
Stand der TechnikState of the art
Scheibenheizungen der gattungsgemäßen Art sind bekannt. Diese besitzen üblicherweise eine Widerstandsheizeinrichtung, die von in Form von mäanderförmig über die zu beheizende Scheibe angeordneten elektrischen Leitern gebildet wird. Die elektrischen Leiter sind hierbei als dünne, flächige oder linienförmige Leiterbahnen auf eine Oberfläche der Scheibe aufgebracht oder - bei Verbundscheiben - in einen Schei- benzwischenraum integriert. Durch Verbinden der Widerstandsheizeinrichtung mit einer Heizspannungsquelle, in der Regel der Kraftfahrzeugbatterie, kommt es infolge eines fließenden elektrischen Stromes zu einer Erwärmung der Widerstandsheizeinrichtung, die daraufhin die zu beheizende Scheibe erwärmt. Bekannt ist, zum Verbinden der Widerstandsheizeinrichtung mit der Heizspannungsquelle ein elektrisches Schaltmittel einzusetzen, das von einem Bedienenden des Kraftfahrzeuges aktivierbar ist. Als elektrische Schaltmittel werden beispielsweise Relais eingesetzt. Diese sind üblicherweise auf einer in der Armaturentafel des Kraftfahrzeuges angeordneten Leiterplatte angeordnet. Bekannt ist ferner, anstelle der mechanischen Relais Halbleiter-Schaltmittel, beispielsweise Leistungstransistoren, einzusetzen, die jedoch zur Anpassung an vorhandene Kontaktstrukturen der mechanischen Relais in Adaptergehäusen plaziert sind. Neben der hiermit verbundenen zusätzlichen Kosten durch den Einsatz des Adaptergehäuses ist die Montage auf einer, unterhalb einer Armaturentafel des Kraftfahrzeuges angeordneten Leiterplatte relativ aufwendig.Disc heaters of the generic type are known. These usually have a resistance heating device which is formed by electrical conductors which are arranged in a meandering shape over the pane to be heated. The electrical conductors are applied as thin, flat or linear conductor tracks to a surface of the pane or - in the case of composite panes - integrated into a space between the panes. By connecting the resistance heating device to a heating voltage source, usually the motor vehicle battery, the resistance heating device is heated as a result of a flowing electrical current, which then heats the pane to be heated. It is known to use an electrical switching means for connecting the resistance heating device to the heating voltage source which can be activated by an operator of the motor vehicle. Relays are used, for example, as electrical switching means. These are usually arranged on a printed circuit board arranged in the dashboard of the motor vehicle. It is also known to use semiconductor switching means, for example power transistors, instead of the mechanical relays, but these are placed in adapter housings to adapt to existing contact structures of the mechanical relays. In addition to the additional costs associated therewith due to the use of the adapter housing, assembly on a circuit board arranged below a dashboard of the motor vehicle is relatively complex.
Vorteile der ErfindungAdvantages of the invention
Die erfindungsgemäße Scheibenheizung mit den im Anspruch 1 genannten Merkmalen bietet demgegenüber den Vorteil, daß in einfacher und kostengünstiger Weise eine Kontaktierung der Widerstandsheizeinrichtung mit einer Heizspannungsquelle möglich ist. Dadurch, daß das Schaltmittel ein unmittelbar auf der zu beheizenden Scheibe angeordnetes Halbleiter-Schaltmittel ist, ist vorteilhaft möglich, die als Standardbauelemente zur Verfügung stehenden Halbleiter-Schaltmittel ohne Zwischenschaltung eines Adaptergehäuses direkt mit der Widerstandsheizeinrichtung auf der zu beheizenden Scheibe zu kontaktieren. Neben dem Entfall eines zusätzlichen Adaptergehäuses ergibt sich der weitere Vorteil, daß die zu beheizende Scheibe gleichzeitig als Träger des Halbleiter-Schaltmittels dient und somit in einfacher Weise durch entsprechendes Design der Widerstandsheizeinrichtung eine Leiterplatte zum Anschluß des Halbleiter-Schaltmittels simuliert wird.The disc heater according to the invention with the features mentioned in claim 1 offers the advantage that contacting the resistance heating device with a heating voltage source is possible in a simple and inexpensive manner. Because the switching means is a semiconductor switching means arranged directly on the pane to be heated, it is advantageously possible to contact the semiconductor switching means available as standard components directly with the resistance heating device on the pane to be heated without the interposition of an adapter housing. In addition to the elimination of one Additional adapter housing has the further advantage that the pane to be heated also serves as a carrier for the semiconductor switching means and thus a circuit board for connecting the semiconductor switching means is simulated in a simple manner by appropriate design of the resistance heating device.
In bevorzugter Ausgestaltung der Erfindung ist vorgesehen, daß das Halbleiter-Schaltmittel intelligente Schaltungsbestandteile enthält, mittels denen vorzugsweise eine automatische Temperaturerfassung und - Steuerung der Widerstandsheizeinrichtung möglich ist. Insbesondere kann sehr vorteilhaft durch direktes Anordnen der die intelligenten Schaltkreise aufwei- senden Halbleiter-Schaltmittel auf der Scheibe eine unmittelbare Temperaturmessung der zu beheizenden Scheibe erfolgen und in Abhängigkeit einer wählbaren Schaltschwelle eine Zu- beziehungsweise Abschaltung der Scheibenheizung automatisch erfolgen.In a preferred embodiment of the invention it is provided that the semiconductor switching means contains intelligent circuit components, by means of which an automatic temperature detection and control of the resistance heating device is preferably possible. In particular, by directly arranging the semiconductor switching means having the intelligent circuits on the pane, a direct temperature measurement of the pane to be heated can be carried out and the pane heating can be switched on or off automatically depending on a selectable switching threshold.
Weitere bevorzugte Ausgestaltungen der Erfindung ergeben sich aus den übrigen, in den Unteransprüchen genannten Merkmalen.Further preferred embodiments of the invention result from the other features mentioned in the subclaims.
Zeichnungendrawings
Die Erfindung wird nachfolgend in Ausführungsbei- spielen anhand der zugehörigen Zeichnungen näher erläutert. Es zeigen:The invention is explained in more detail below in exemplary embodiments with reference to the associated drawings. Show it:
Figur 1 eine schematische Gesamtansicht einer Scheibenheizung; Figur 2 den Einsatz eines Halbleiter-Schaltmittels in einer ersten Ausführungsvariante undFigure 1 is a schematic overall view of a window heater; Figure 2 shows the use of a semiconductor switching means in a first embodiment and
Figur 3 den Einsatz eines Halbleiter-Schaltmittels in einer zweiten Ausführungsvariante.Figure 3 shows the use of a semiconductor switching means in a second embodiment.
Beschreibung der AusführungsbeispieleDescription of the embodiments
Figur 1 zeigt eine schematische Ansicht einer Scheibenheizung 10 zum Heizen einer Scheibe 12. Die Scheibe 12 ist beispielsweise eine Kraftfahrzeugscheibe, insbesondere eine Heckscheibe, eine Frontscheibe oder eine Seitenscheibe. Die Scheibenheizung 10 umfaßt eine Widerstandsheizeinrichtung 14, die von einer mäanderförmig auf der Scheibe 12 angeordneten Leiterschleife 16 gebildet ist. Die Leiterschleife 16 bildet zwei Anschlußbereiche 18 beziehungsweise 20 aus, die mit einem Schaltmittel 22 kontaktiert sind. Das Schaltmittel 22 ist ein allgemein als Halbleiter- Schaltmittel 24 bezeichneter Leistungstransistor. Das Schaltmittel 22 ist über Anschlußleitungen 26 und 28 mit einer Heizspannungsquelle 30, beispielsweise einer Kraftfahrzeugbatterie, verbunden. Eine Steueranschlußleitung 32 ist mit einem Steuersignal zu einer Betätigung des Schaltmittels 22 beaufschlagbar. Das Halbleiter-Schaltmittel 24 ist unmittelbar auf der Scheibe 12 angeordnet. Die Position des Halblei- ter-Schaltmittels 24 ist so gewählt, daß dieses einerseits mit den Anschlußleitungen 26, 28 sowie der Steuerleitung 32 und andererseits mit den Anschlußbe- reichen 18 und 20 kontaktierbar ist. Eine Position des Halbleiter-Schaltmittels liegt beispielsweise in einem Eckbereich der Scheibe 12, der einerseits gegen eventuelle mechanische Beanspruchung relativ ge- schützt liegt und andererseits für eine freie Sicht durch die Scheibe 12 nicht notwendigerweise zur Verfügung stehen muß.FIG. 1 shows a schematic view of a window heater 10 for heating a window 12. The window 12 is, for example, a motor vehicle window, in particular a rear window, a front window or a side window. The disk heater 10 comprises a resistance heating device 14, which is formed by a conductor loop 16 arranged in a meandering manner on the disk 12. The conductor loop 16 forms two connection areas 18 and 20, which are contacted with a switching means 22. The switching means 22 is a power transistor, generally referred to as semiconductor switching means 24. The switching means 22 is connected via connecting lines 26 and 28 to a heating voltage source 30, for example a motor vehicle battery. A control connection line 32 can be acted upon with a control signal for actuating the switching means 22. The semiconductor switching means 24 is arranged directly on the disk 12. The position of the semiconductor switching means 24 is selected so that it on the one hand with the connecting lines 26, 28 and the control line 32 and on the other hand with the connecting lines range 18 and 20 is contactable. One position of the semiconductor switching means is, for example, in a corner region of the pane 12, which on the one hand is relatively protected against possible mechanical stress and on the other hand does not necessarily have to be available for a clear view through the pane 12.
Die allgemeine Funktion der Scheibenheizung 10 ist bekannt, so daß im Rahmen der vorliegenden Beschreibung hierauf nicht detailliert eingegangen wird. Durch Beaufschlagen der Steuerleitung 32 mit einem Signal verändert das Halbleiter-Schaltmittel 24 seine Schaltstellung, so daß die Heizspannungsquelle 30 mit der Leiterschleife 16 verbunden wird. Hierdurch kommt es zu einem Fließen eines Heizstromes I, der in bekannter Weise zum Aufheizen der Leiterschleife 16 und somit der Scheibe 12 führt.The general function of the window heater 10 is known, so that it is not discussed in detail in the context of the present description. By applying a signal to the control line 32, the semiconductor switching means 24 changes its switching position, so that the heating voltage source 30 is connected to the conductor loop 16. This results in a flow of a heating current I, which leads to the heating of the conductor loop 16 and thus the disk 12 in a known manner.
Anhand der in den Figuren 2 und 3 gezeigten Ausführungsvarianten wird auf die Anordnung der Halbleiter- Schaltmittel 24 auf der Scheibe 12 eingegangen. Hierbei ist jeweils nur ein Eckbereich der Scheibe 12 gezeigt, innerhalb dem die Halbleiter-Schaltmittel 24 angeordnet sind. Gleiche Teile wie in Figur 1 sind mit gleichen Bezugszeichen versehen und nicht nochmals erläutert. In Figur 2a beziehungsweise 3a ist jeweils eine schematische Draufsicht und in Figur 2b beziehungsweise 3b jeweils eine schematische Seiten- ansieht des Anschlußbereiches gezeigt. In Figur 2 ist das Halbleiter-Schaltmittel 24 ein unter der Handelsbezeichnung TO-220 bekannter Standard-Leistungstransistor. Dieses besitzt ein Standardgehäuse 34, innerhalb dem ein detailliert nicht dargestellter Silizium-Chip angeordnet ist, der über drei äußere Anschlußkontakte 36, 38 und 40 ansteuerbar ist. Die Anschlußkontakte 36 und 38 sind die Schaltkontakte, während der Anschlußkontakt 40 der Steuerkontakt ist. Der Anschlußkontakt 36 ist mit der Anschlußleitung 28 verbunden, während der Anschlußkontakt 40 mit der Steuerleitung 32 verbunden ist. Hierzu können die Anschlußkontakte 36 und 40, wie die schematische Seitenansicht in Figur 2b zeigt, gegebenenfalls geringfügig, von der Scheibe 12 weg, abgebo- gen sein. Eine Verbindung zwischen den Anschlußkontakten 36 und 40 sowie der Anschlußleitung 28 beziehungsweise der Steuerleitung 32 kann beispielsweise durch eine Lötverbindung oder andere geeignete elektrisch leitende Kontaktierungen erfolgen. Der An- schlußkontakt 38 ist mit einer Anschlußfahne 42 desThe arrangement of the semiconductor switching means 24 on the disk 12 is discussed with the aid of the embodiment variants shown in FIGS. 2 and 3. Only one corner region of the pane 12 is shown here, within which the semiconductor switching means 24 are arranged. The same parts as in Figure 1 are provided with the same reference numerals and not explained again. FIGS. 2a and 3a each show a schematic top view and FIGS. 2b and 3b each show a schematic side view of the connection area. In Figure 2, the semiconductor switching means 24 is a standard power transistor known under the trade name TO-220. This has a standard housing 34, within which a silicon chip (not shown in detail) is arranged, which can be controlled via three outer connection contacts 36, 38 and 40. The connection contacts 36 and 38 are the switching contacts, while the connection contact 40 is the control contact. The connection contact 36 is connected to the connection line 28, while the connection contact 40 is connected to the control line 32. For this purpose, as shown in the schematic side view in FIG. 2b, the connecting contacts 36 and 40 can be bent slightly away from the disk 12, if necessary. A connection between the connecting contacts 36 and 40 and the connecting line 28 or the control line 32 can be made, for example, by a soldered connection or other suitable electrically conductive contacts. The connection contact 38 is connected to a connection lug 42 of the
Anschlußbereiches 20 kontaktiert.Connection area 20 contacted.
Die Anschlußfahne 42 bildet - in der in Figur 2 gezeigten Draufsicht gesehen - eine Erweiterung aus und dient gleichzeitig als Montagegrundlage für das Halbleiter-Schaltmittel 24. Hierzu kann das Gehäuse 34 des Halbleiter-Schaltmittels 24 beispielsweise flächig auf die Anschlußfahne 42 gefügt sein. Eine kraftschlüssige Verbindung kann beispielsweise durch Kleben, Löten oder andere geeignete Verbindungstechniken erfolgen. Der Anschlußkontakt 38 ist beispielsweise, wie wiederum die schematische Seitenan- sieht in Figur 2b zeigt, in Richtung der Scheibe 12 abgewinkelt und auf einer fingerartigen Verlängerung der Anschlußfahne 42, beispielsweise durch Löten, kontaktiert .The connection lug 42 forms an extension, as seen in the plan view shown in FIG. 2, and at the same time serves as an assembly basis for the semiconductor switching means 24. For this purpose, the housing 34 of the semiconductor switching means 24 can be joined, for example, flatly to the connection lug 42. A non-positive connection can be made, for example, by gluing, soldering or other suitable connection techniques. The connection contact 38 is, for example, as again the schematic side view see in Figure 2b shows, angled in the direction of the disc 12 and contacted on a finger-like extension of the terminal lug 42, for example by soldering.
Anhand der in den Figuren 2a und 2b gezeigten Ansichten wird ohne weiteres deutlich, daß das standardisierte Halbleiter-Schaltmittel 24 in einfacher Weise direkt auf der Scheibe 12 angeordnet werden kann. Der Anschlußbereich 20 der Widerstandsheizeinrichtung 14 dient hierbei gleichzeitig neben einer elektrischen Kontaktierung des Halbleiter-Schaltmittels 24 einer mechanischen Fixierung des Halbleiter-Schaltmittels 24 auf der Scheibe 12. Darüber hinaus kann über die Anschlußfahne 42 gleichzeitig eine Verlustwärme des Halbleiter-Schaltmittels 24 aufgenommen und an die Scheibe 12 abgeführt werden. Neben der hiermit verbundenen notwendigen Kühlung zur Abführung einer Verlustwärme des Halbleiter-Schaltmittels 24 steht eine zusätzliche, zumindest lokale Wärmequelle zur Erwärmung der Scheibe 12 zur Verfügung.From the views shown in FIGS. 2a and 2b, it is readily apparent that the standardized semiconductor switching means 24 can be arranged directly on the pane 12 in a simple manner. The connection area 20 of the resistance heating device 14 serves here, in addition to making electrical contact with the semiconductor switching means 24, for mechanically fixing the semiconductor switching means 24 on the disk 12. In addition, heat loss from the semiconductor switching means 24 can be absorbed via the connecting lug 42 and transferred to the Disk 12 are removed. In addition to the associated cooling necessary to dissipate heat loss from the semiconductor switching means 24, an additional, at least local, heat source is available for heating the pane 12.
In Figur 3a und Figur 3b ist eine Ausführungsvariante gezeigt, bei der das Halbleiter-Schaltmittel 24 von einem Standard-Leistungstransistor gebildet wird, der unter der Handelsbezeichnung PS-010 verfügbar ist. Entsprechend des gegebenen konstruktiven Aufbaus des Halbleiter-Schaltmittels 24 ist dessen Anschlußkontakt 36 auf der Anschlußfahne 42 des Anschlußberei- ches 20 aufgebracht. Hierbei erfolgt wiederum entweder eine elektrisch leitfähige Kleb- oder Lötverbindung zwischen der Anschlußfahne 42 und dem Anschluß- kontakt 38, so daß neben der elektrischen Kontaktie- rung gleichzeitig eine mechanische Fixierung des Halbleiter-Schaltmittels 24 gegeben ist. Der hier von einer Mehrzahl von Anschlußbeinchen gebildete An- schlußkontakt 36 ist über eine Zwischenleiterbahn 46 mit der Anschlußleitung 28 verbunden. Der hier ebenfalls von einer Mehrzahl von Anschlußbeinchen gebildete Anschlußkontakt 40 ist ebenfalls über eine Zwischenleiterbahn 48 mit der Steuerleitung 32 verbun- den. Das Design der Anschlußfahne 42 beziehungsweise der Zwischenleiterbahnen 46 und 48 ist der vorgegebenen Lage der Anschlußkontakte 36, 38 und 40 des Halbleiter-Schaltmittels 24 angepaßt. Eine Strukturierung der Anschlußfahne 42 beziehungsweise der Zwischenlei- terbahnen 46 und 48 sowie der Anschlußbereiche 18 und 20 der Leiterschleife 16 kann gleichzeitig mit Aufbringen der Leiterschleife 16 auf die Scheibe 12 erfolgen. Somit dient die Scheibe 12 im übertragenen Sinne gleichzeitig als Leiterplatte zum Kontaktieren der Halbleiter-Schaltmittel 24.FIGS. 3a and 3b show an embodiment variant in which the semiconductor switching means 24 is formed by a standard power transistor, which is available under the trade name PS-010. In accordance with the given design of the semiconductor switching means 24, its connection contact 36 is applied to the connection lug 42 of the connection area 20. Here again, there is either an electrically conductive adhesive or solder connection between the terminal lug 42 and the terminal Contact 38, so that in addition to the electrical contacting, the semiconductor switching means 24 is mechanically fixed at the same time. The connection contact 36 formed here by a plurality of connecting legs is connected to the connection line 28 via an intermediate conductor track 46. The connection contact 40, which is likewise formed here by a plurality of connecting legs, is likewise connected to the control line 32 via an intermediate conductor track 48. The design of the connecting lug 42 or the intermediate conductor tracks 46 and 48 is adapted to the predetermined position of the connecting contacts 36, 38 and 40 of the semiconductor switching means 24. A structuring of the connecting lug 42 or the intermediate conductor tracks 46 and 48 and the connection regions 18 and 20 of the conductor loop 16 can take place simultaneously with the application of the conductor loop 16 to the disk 12. Thus, in the figurative sense, the disk 12 simultaneously serves as a printed circuit board for contacting the semiconductor switching means 24.
Nach weiteren, nicht näher dargestellten Ausführungsbeispielen, kann vorgesehen sein, daß die Halbleiter- Schaltmittel 24 integrierte intelligente Schaltkreise enthalten, mittels denen beispielsweise eine Zeitsteuerung und/oder eine Temperatursteuerung der Halbleiter-Schaltmittel 24 möglich ist. Durch die direkte thermische Kopplung der Halbleiter-Schaltmittel 24 mit der Scheibe 12 kann besonders bevorzugt eine Temperatur der Scheibe 12 ermittelt und diese als Regelgröße für eine Zu- beziehungsweise Abschaltung der Halbleiter-Schaltmittel 24 genutzt werden. Ent- sprechend auswählbarer Schwellwerte kann somit ein optimales Ein- beziehungsweise Ausschalten der Scheibenheizung 10 gewährleistet werden, wodurch eine Belastung der von der Kraftfahrzeugbatterie gebilde- ten Heizspannungsquelle 30 auf ein notwendiges Minimum beschränkt bleibt.According to further exemplary embodiments, which are not shown in detail, it can be provided that the semiconductor switching means 24 contain integrated intelligent circuits, by means of which, for example, time control and / or temperature control of the semiconductor switching means 24 is possible. Through the direct thermal coupling of the semiconductor switching means 24 to the pane 12, a temperature of the pane 12 can particularly preferably be determined and this can be used as a control variable for switching the semiconductor switching means 24 on and off. Ent- According to selectable threshold values, an optimal switching on and off of the window heater 10 can thus be ensured, whereby a load on the heating voltage source 30 formed by the motor vehicle battery is kept to a necessary minimum.
Insgesamt kann die Scheibe 12, beispielsweise als Kraftfahrzeugscheibe, mit einer, bereits mit einem integrierten Schaltmittel 22 versehenen, Scheibenheizung 10 vorgefertigt werden und ist beim Endverbraucher als komplette Baueinheit einsetzbar. Es muß lediglich noch die Kontaktierung mit den Anschlußlei- tungen 26 und 28 sowie der Steuerleitung 32 erfolgen, die beispielsweise durch einfache Steckverbindungen ohne zusätzliche Hilfsmittel realisierbar sind. Overall, the pane 12, for example as a motor vehicle pane, can be prefabricated with a pane heater 10 which is already provided with an integrated switching means 22 and can be used by the end user as a complete structural unit. It is only necessary to make contact with the connecting lines 26 and 28 and the control line 32, which can be implemented, for example, by simple plug connections without additional aids.

Claims

Patentansprüche claims
1. Scheibenheizung, insbesondere zum Heizen einer Scheibe eines Kraftfahrzeuges, mit einer auf die Scheibe aufgebrachten oder in die Scheibe integrierten Widerstandsheizeinrichtung, die über Anschlußkontakte mittels eines elektrischen Schaltmittels mit einer Heizspannungsquelle verbindbar ist, dadurch gekennzeichnet, daß das Schaltmittel (22) ein unmittelbar auf der zu beheizenden Scheibe (12) angeordnetes Halbleiter-Schaltmittel (24) ist, wobei das Halbleiter-Schaltmittel (24) direkt mit Anschlußbereichen (18, 20) einer Leiterschleife (16) der Widerstandsheizeinrichtung (14) kontaktiert ist.1. pane heating, in particular for heating a pane of a motor vehicle, with a resistance heating device applied to the pane or integrated into the pane, which can be connected via connecting contacts by means of an electrical switching means to a heating voltage source, characterized in that the switching means (22) is directly on of the pane (12) to be heated is semiconductor switching means (24), the semiconductor switching means (24) being in direct contact with connection regions (18, 20) of a conductor loop (16) of the resistance heating device (14).
2. Scheibenheizung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß wenigstens einer der Anschlußbereiche (18, 20) eine Anschlußfahne (42) ausbildet, die neben einer elektrischen Kontaktierung einer mechanischen Fixierung des Halbleiter-Schaltmittels (24) dient.2. Disk heater according to one of the preceding claims, characterized in that at least one of the connection regions (18, 20) forms a connection lug (42) which, in addition to making electrical contact, serves to mechanically fix the semiconductor switching means (24).
3. Scheibenheizung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Anschlußfahne (42) als Wärmeleiter zur Ableitung einer Verlustwärme des Halbleiter-Schal mittels (24) dient.3. Disc heater according to one of the preceding claims, characterized in that the connecting lug (42) serves as a heat conductor for dissipating heat loss from the semiconductor scarf by means of (24).
4. Scheibenheizung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß wenigstens einer der Anschlußbereiche (18, 20) ein Design von Leiterbahnen (46, 48) ausbildet, das am Anschluß eines Standard-Halbleiter-Schaltmittels (24) angepaßt ist.4. Window heater according to one of the preceding claims, characterized in that at least one of the connection areas (18, 20) has a design of Forms conductor tracks (46, 48) which is adapted to the connection of a standard semiconductor switching means (24).
5. Scheibenheizung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Halbleiter- Schaltmittel (24) intelligente Schaltungsbestandteile umfaßt, mittels denen eine Zeit- und/oder Temperatursteuerung des Halbleiter-Schaltmittels (24) erfolgt.5. Window heater according to one of the preceding claims, characterized in that the semiconductor switching means (24) comprises intelligent circuit components, by means of which a time and / or temperature control of the semiconductor switching means (24) takes place.
6. Scheibenheizung nach Anspruch 5 , dadurch gekennzeichnet, daß das Halbleiter-Schaltmittel (24) in Abhängigkeit einer direkt über das Halbleiter- Schaltmittel (24) gemessenen Temperatur der Scheibe (12) die Widerstandsheizeinrichtung (14) mit der6. Disc heater according to claim 5, characterized in that the semiconductor switching means (24) in dependence on a directly via the semiconductor switching means (24) measured temperature of the disc (12), the resistance heater (14) with the
Heizspannungsquelle (30) verbindet beziehungsweise trennt .Heating voltage source (30) connects or disconnects.
7. Scheibenheizung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das7. Window heater according to one of the preceding claims, characterized in that the
Schaltmittel (22) als integrierter Bestandteil der Scheibe (12) ausgebildet ist, das mit Anschlußbeziehungsweise Steuerleitungen (26, 28, 32) einer Kraftfahrzeugverdrahtung kontaktierbar ist. Switching means (22) is designed as an integrated component of the disc (12), which can be contacted with connection or control lines (26, 28, 32) of a motor vehicle wiring.
EP98963320A 1997-11-20 1998-11-05 Window heater Expired - Lifetime EP1033064B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19751423A DE19751423A1 (en) 1997-11-20 1997-11-20 Window heating
DE19751423 1997-11-20
PCT/DE1998/003218 WO1999027756A1 (en) 1997-11-20 1998-11-05 Window heater

Publications (2)

Publication Number Publication Date
EP1033064A1 true EP1033064A1 (en) 2000-09-06
EP1033064B1 EP1033064B1 (en) 2002-02-13

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EP98963320A Expired - Lifetime EP1033064B1 (en) 1997-11-20 1998-11-05 Window heater

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US (1) US6320159B1 (en)
EP (1) EP1033064B1 (en)
JP (1) JP4199924B2 (en)
DE (2) DE19751423A1 (en)
WO (1) WO1999027756A1 (en)

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Publication number Publication date
DE19751423A1 (en) 1999-06-02
EP1033064B1 (en) 2002-02-13
JP4199924B2 (en) 2008-12-24
JP2001524742A (en) 2001-12-04
WO1999027756A1 (en) 1999-06-03
DE59803098D1 (en) 2002-03-21
US6320159B1 (en) 2001-11-20

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