EP1601235A2 - Monitoring device suitable for flexible heating elements - Google Patents

Monitoring device suitable for flexible heating elements Download PDF

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Publication number
EP1601235A2
EP1601235A2 EP05006383A EP05006383A EP1601235A2 EP 1601235 A2 EP1601235 A2 EP 1601235A2 EP 05006383 A EP05006383 A EP 05006383A EP 05006383 A EP05006383 A EP 05006383A EP 1601235 A2 EP1601235 A2 EP 1601235A2
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EP
European Patent Office
Prior art keywords
monitoring device
heating
conductors
conductor
contact
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Granted
Application number
EP05006383A
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German (de)
French (fr)
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EP1601235B1 (en
EP1601235A3 (en
Inventor
Jochen Michelmann
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IG Bauerhin GmbH
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IG Bauerhin GmbH
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Publication of EP1601235A3 publication Critical patent/EP1601235A3/en
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Publication of EP1601235B1 publication Critical patent/EP1601235B1/en
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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
    • H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
    • H05B3/34—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs
    • H05B3/342—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs heaters used in textiles
    • 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
    • H05B2203/003—Heaters using a particular layout for the resistive material or resistive elements using serpentine layout
    • 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
    • H05B2203/005—Heaters using a particular layout for the resistive material or resistive elements using multiple resistive elements or resistive zones isolated from each other
    • 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
    • H05B2203/014—Heaters using resistive wires or cables not provided for in H05B3/54
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/017—Manufacturing methods or apparatus for heaters
    • 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
    • H05B2203/029—Heaters specially adapted for seat warmers

Definitions

  • the present invention relates to a control and monitoring device for Prevention of overheating in flexible, textile surface heating elements, the at least two opposing contact conductors made of electrically conductive, uninsulated fibers or wires, between which several heating conductors extend, which are electrically connected to the contactors.
  • From DE 4 101 290 and DE 19 831 574 are textile surface heating with at least two opposing contact strips of electrically conductive, uninsulated fibers or wires, between which more of an electrical Resistance material existing uninsulated heating conductors run, known.
  • This type of surface heating elements are used primarily for seat heaters Used motor vehicles. Due to chemical and mechanical influences Like water, salt and movement on the seat, both the heating conductors and the Over time the contact ladder was attacked and destroyed locally.
  • the mechanism of destruction is such that either the leaders of the Break contact strips by constant bending and compression and thus the Cross section of the contact strip tapers at the kink or the contact conductors are chemically attacked and decompose or the contact resistance from heat conductor to the contact conductor increases, so that increased heat output is produced. Also, the installation of a temperature sensor can be at the above Heating elements do not exclude the thermal problems on the contact conductors.
  • a monitoring device of to develop the aforementioned type which prevents the heating element to or near the contact conductor gets so hot that the allowable thermal Limit temperature of the surrounding materials is exceeded.
  • this object is achieved by a control and Monitoring device to prevent overheating in flexible, textile Surface heating elements consisting of at least two opposite ones Contact conductors consist of electrically conductive, uninsulated fibers or wires, between which several heating conductors extend, which with the contact conductors electrically are conductively connected, with an additional conductor is placed over the heating element and with a Evaluation unit is coupled to the with a current-voltage source for the heating conductors works together to prevent overheating.
  • the additional conductor carries an insulation made of plastic or paint, which at intended use does not melt and thus prevents the Heat conductor and the additional conductor get electrical contact.
  • a detection conductor as additional conductor two or monitored multiple contact strips, this from a contact strip along the Heating conductor is led to the next contact strip.
  • claim 2 allow in particular the safe operation of Heating elements with metallic contact conductors and interconnected Heating conductors made of carbon fibers. Because these high temperatures are at fault locations at the Due to the high melting temperature of the Carbon fibers cause significant damage.
  • the heating element according to Fig. 1 consists of a two-part textile Surface heating element 4, the upper part of a wavy heating conductor and whose lower part have a network-arranged heating conductor.
  • the heating conductors are 8.1, 8.2 as CarbonMapleiter and the Additional conductor 1 formed as a rectilinear detection conductor.
  • This arrangement but is not mandatory, but it can be modified by case by metallic heating conductors or other heating conductor materials.
  • the additional ladder in However, they should be routed through the heating element at any angle remain outside the temperature sensing range, which in this example is lower terminal end of the contact conductor indicated by a temperature sensor 5 Is.
  • a section of the heating element is shown in cross-sectional shape.
  • the contact conductors 3 and the carbon heating conductors 8 are present as filaments.
  • the salt conductor consists of a detection conductor 1 in its core of a steel filament. 7 which is provided with a coating material of a melt insulation 6.
  • the monitoring device according to the invention thus consists of the additional conductors in the form of detection conductors 1 and the evaluation circuit 11. It is therefore relatively easy to introduce in a heating element and hardly causes additional costs. Due to its simple structure is the inventive Monitoring device is immune to interference and provides throughout the entire Lifetime of a panel heater safe protection against excessive Warming.

Abstract

The heating wires (8.1,8.2) in a motor vehicle seat are energised by connecting wires (3.1,3.2). Monitor wires (1), consisting of steel cable with an insulating fusible sheath and connected to a fuse (11), lie alongside the heating matrix and if overheating arises the sheath melts and fuses the system.

Description

Die vorliegende Erfindung betrifft eine Kontroll- und Überwachungseinrichtung zur Vermeidung von Überhitzungen bei flexiblen, textilen Flächenheizelementen, die aus mindestens zwei sich gegenüberliegenden Kontaktleitern aus elektrisch leitfähigen, unisolierten Fasern oder Drähten bestehen, zwischen denen mehrere Heizleiter verlaufen, welche mit den Kontaktieltern elektrisch leitend verbunden sind.The present invention relates to a control and monitoring device for Prevention of overheating in flexible, textile surface heating elements, the at least two opposing contact conductors made of electrically conductive, uninsulated fibers or wires, between which several heating conductors extend, which are electrically connected to the contactors.

Stand der TechnikState of the art

Aus der DE 4 101 290 sowie der DE 19 831 574 sind textile Flächenheizelemente mit mindestens zwei sich gegenüberliegenden Kontaktleisten aus elektrisch leitfähigen, unisolierten Fasern oder Drähten, zwischen denen mehrere aus einem elektrischem Widerstandsmaterial bestehenden unisolierte Heizleitern verlaufen, bekannt.From DE 4 101 290 and DE 19 831 574 are textile surface heating with at least two opposing contact strips of electrically conductive, uninsulated fibers or wires, between which more of an electrical Resistance material existing uninsulated heating conductors run, known.

Diese Art von Flächenheizelementen werden in erster Linie für Sitzheizungen in Kraftfahrzeugen eingesetzt. Aufgrund von chemischen und mechanischen Einflüssen wie Wasser, Salz und Bewegung auf dem Sitz werden sowohl die Heizleiter als auch die Kontaktleiter im Laufe der Zeit angegriffen und lokal zerstört.This type of surface heating elements are used primarily for seat heaters Used motor vehicles. Due to chemical and mechanical influences Like water, salt and movement on the seat, both the heating conductors and the Over time the contact ladder was attacked and destroyed locally.

Werden Teile der Kontaktleiter zerstört, so ergeben sich Übergangswiderstände und damit lokale Wärmeentwicklungen entlang der Kontaktleisten die zu unzulässigen Erwärmungen des Heizelementes führen können.If parts of the contact conductors are destroyed, then contact resistance and so that local heat developments along the contact strips to impermissible Can cause heating of the heating element.

Die DE 4 101 290 und G 90 075 19 offenbart ein Heizelement dessen mechanische Lebensdauer durch Kontaktleisten mit wellenförmigem Verlauf verlängert werden soll, was das Problem einer Überhitzung zwar mindert aber nicht verhindern kann. Gegen korrosive Angriffe auf metallische Leiter sind Oberflächenbeschichtungen aus Silber und Zinn bekannt, welche aber durch Elektrokorrosion bei Anwesenheit von Salz und Feuchtigkeit in Verbindung mit elektrischen Spannungen zerstört werden. DE 4 101 290 and G 90 075 19 discloses a heating element whose mechanical Life is to be extended by contact strips with wave-shaped course, which reduces but does not prevent the problem of overheating. Versus Corrosive attacks on metallic conductors are surface coatings of silver and tin, which, however, by electrocorrosion in the presence of salt and Moisture in connection with electrical voltages are destroyed.

Der Mechanismus der Zerstörung läuft dabei so ab, dass entweder die Leiter der Kontaktleisten durch ständige Biegung und Stauchung brechen und sich damit der Querschnitt der Kontaktleiste an der Knickstelle verjüngt oder aber die Kontaktleiter werden chemisch angegriffen und zersetzen sich oder aber den Übergangswiderstand von Heizleiter auf die Kontaktleiter erhöht sich, so dass vermehrt Wärmeleistung erzeugt wird. Auch der Einbau eines Temperaturfühlers kann bei den oben genannten Heizelementen die thermischen Probleme an den Kontaktleitern nicht ausschließen.The mechanism of destruction is such that either the leaders of the Break contact strips by constant bending and compression and thus the Cross section of the contact strip tapers at the kink or the contact conductors are chemically attacked and decompose or the contact resistance from heat conductor to the contact conductor increases, so that increased heat output is produced. Also, the installation of a temperature sensor can be at the above Heating elements do not exclude the thermal problems on the contact conductors.

Daher ist es Aufgabe der vorliegenden Erfindung eine Überwachungsreinrichtung der eingangs genannten Art zu entwickeln, welche verhindert, dass das Heizelement an oder in der Nähe der Kontaktleiter so heiß wird, dass die zulässige thermische Grenztemperatur der umliegenden Materialien überschritten wird.It is therefore an object of the present invention, a monitoring device of to develop the aforementioned type, which prevents the heating element to or near the contact conductor gets so hot that the allowable thermal Limit temperature of the surrounding materials is exceeded.

Erfindungsgemäß wird diese Aufgabe gelöst durch eine Kontroll- und Überwachungseinrichtung zur Vermeidung von Überhitzungen bei flexiblen, textilen Flächenheizelementen, die aus mindestens zwei sich gegenüberliegenden Kontaktleitern aus elektrisch leitfähigen, unisolierten Fasern oder Drähten bestehen, zwischen denen mehrere Heizleiter verlaufen, welche mit den Kontaktleitern elektrisch leitend verbunden sind, wobei ein Zusatzleiter über die Heizleiter gelegt ist und mit einer Auswerteeinheit gekoppelt ist, die mit einer Strom-Spannungsquelle für die Heizleiter zur Vermeidung von Überhitzungen zusammen wirkt.According to the invention this object is achieved by a control and Monitoring device to prevent overheating in flexible, textile Surface heating elements consisting of at least two opposite ones Contact conductors consist of electrically conductive, uninsulated fibers or wires, between which several heating conductors extend, which with the contact conductors electrically are conductively connected, with an additional conductor is placed over the heating element and with a Evaluation unit is coupled to the with a current-voltage source for the heating conductors works together to prevent overheating.

Der Zusatzleiter trägt eine Isolierung aus Kunststoff oder Lack, welche bei bestimmungsmäßigem Gebrauch nicht schmilzt und somit verhindert, dass der Heizleiter und der Zusatzleiter elektrischen Kontakt bekommen. Es sind dabei auch Ausführungsformen denkbar, bei denen ein Detektionsleiter als Zusatzleiter zwei oder mehrere Kontaktleisten überwacht, wobei dieser von einer Kontaktleiste entlang der Heizleiter bis zur nächsten Kontaktleiste geführt wird.The additional conductor carries an insulation made of plastic or paint, which at intended use does not melt and thus prevents the Heat conductor and the additional conductor get electrical contact. There are also Embodiments conceivable in which a detection conductor as additional conductor two or monitored multiple contact strips, this from a contact strip along the Heating conductor is led to the next contact strip.

Entsteht irgendwo im Bereich des Detektionsleiters eine ausreichend hohe Temperatur im Bereich der Kontaktleiste oder der über die Kontaktleiste verlaufenden Heizleiter, so schmilzt die Isolierung und der Detektionsleiter bekommt elektrischen Kontakt mit den darunter liegenden nicht isolierten Heiz- und/oder Kontaktleitern.If there is a sufficiently high temperature somewhere in the area of the detection conductor in the area of the contact strip or the heat conductor extending over the contact strip, see above melts the insulation and the detection conductor gets electrical contact with the underlying non-insulated heating and / or contact conductors.

Diese elektrische Verbindung wird von der Auswerteeinheit, z.B. einem entfernten Steuergerät erfasst und das Heizelement wird vor Entstehung eines Brandes von der Strom-Spannungsquelle abgeschaltet. Vorzugsweise ist dieses Steuergerät auch gleichzeitig das Regelgerät für die Betriebstemperatur des Heizelements.This electrical connection is made by the evaluation unit, e.g. a distant one Detected control unit and the heating element is before the creation of a fire of the Current voltage source switched off. Preferably, this controller is also at the same time the control device for the operating temperature of the heating element.

Die Merkmale in Anspruch 2 ermöglichen insbesondere den sicheren Betrieb von Heizelementen mit metallischen Kontaktleitern und untereinander verbundenen Heizleitern aus Kohlefasern. Da diese hohe Temperaturen bei Fehlstellen an der Kontaktleiste erzeugen, kann es aufgrund der hohen Schmelztemperatur der Kohlefasern zu erheblichen Schäden kommen.The features of claim 2 allow in particular the safe operation of Heating elements with metallic contact conductors and interconnected Heating conductors made of carbon fibers. Because these high temperatures are at fault locations at the Due to the high melting temperature of the Carbon fibers cause significant damage.

Die Merkmale aus Anspruch 3 stellen sicher, dass der Zusatzleiter seinerseits den mechanischen Knick- und Stauchbelastungen gewachsen ist und nicht im Bereich der Kontaktleiste zerstört wird. Dies wird erfindungsgemäß durch einen elektrisch zwar nur mäßig leitenden Stahlleiter erreicht, der aber hervorragende mechanische Stabilität aufweist.The features of claim 3 ensure that the additional conductor in turn the mechanical buckling and compression loads has grown and not in the field of Contact strip is destroyed. This is according to the invention by an electrically only moderately conductive steel conductor achieved, but excellent mechanical stability having.

Die Merkmale aus Anspruch 5 und 6 stellen sicher, dass die Isolierung nicht schon beim Herstellungsprozess beschädigt wird, da in bestimmten Wirkverfahren spitze Nadeln eingesetzt werden, die die Isolierung verletzen können. Speziell Kohlefaser werden von den Nadeln durch die Isolierung hindurch bis zum Leiter gezogen, so dass ein unerwünschter elektrischer Kontakt hergestellt wird.The features of claim 5 and 6 ensure that the insulation is not already at Manufacturing process is damaged, since in certain knitting process pointed needles be used, which can hurt the insulation. Specially carbon fiber are from pulled the needles through the insulation to the conductor, so that a unwanted electrical contact is made.

Die Merkmale aus Anspruch 7 und 8 verhindern eine Zerstörung des Zusatzleiters durch mechanische Beanspruchungen.The features of claim 7 and 8 prevent destruction of the additional conductor by mechanical stress.

Beschreibung der ErfindungDescription of the invention

Im folgenden wird die Erfindung anhand mehrerer Ausführungsbeispiele erläutert. Es zelgen:

Figur 1
Draufsicht auf ein erfindungsgemäßes flexibles Heizelement
Figur 2
Darstellung eines Ausschnitts X des flexiblen Heizelements nach Fig. 1 als Querschnitt des Flächenheizelements im Bereich eines Kontaktleiters
In the following the invention will be explained with reference to several embodiments. It says:
FIG. 1
Top view of a flexible heating element according to the invention
FIG. 2
Representation of a section X of the flexible heating element according to Fig. 1 as a cross section of the surface heating element in the region of a contact conductor

Das Heizelement nach Fig. 1 besteht aus einem zweiteiligen textilen Flächenheizelement 4, dessen oberer Teil einen wellenförmig verlaufenden Heizleiter und dessen unterer Teil netzförmig angeordnete Heizleiter aufweisen.The heating element according to Fig. 1 consists of a two-part textile Surface heating element 4, the upper part of a wavy heating conductor and whose lower part have a network-arranged heating conductor.

An beiden Seitenrändern des flexiblen Heizelementes befindet sich ein Bereich von Kontaktleitern 3.1, 3.2, die über entsprechende Zuführungsleitungen 9, 10 mit einer Spannungsquelle (nicht dargestellt) verbunden sind.On both side edges of the flexible heating element is a range of Contact conductors 3.1, 3.2, via corresponding supply lines 9, 10 with a Voltage source (not shown) are connected.

Parallel zu den Kontaktleitern 3.1, 3.2 zum Innenbereich des Heizelementes ist je ein Zusatzleiter 1 in Form eines Detektionsleiters angeordnet. Im unteren Bereich des Heizelementes, etwa auf der Höhe der Zufuhrleitungen 9, 10 werden die Delektionsleiter zusammengeführt und mit einer Auswerteschaltung 11 verbunden.Parallel to the contact conductors 3.1, 3.2 to the interior of the heating element is ever one Additional conductor 1 arranged in the form of a detection conductor. At the bottom of the Heating element, approximately at the height of the supply lines 9, 10 are the Delektionleiter merged and connected to an evaluation circuit 11.

Im vorliegenden Beispiel sind die Heizleiter 8.1, 8.2 als Carbonheizleiter und die Zusatzleiter 1 als geradlinig verlaufende Detektionsleiter ausgebildet. Diese Anordnung ist aber nicht zwingend, sondern sie kann fallweise auch abgewandelt werden durch metallische Heizleiter oder andere Heizleitermaterialien. Auch können die Zusatzleiter in jedem beliebigem Winkel über das Heizelement geführt werden, sie sollten jedoch außerhalb des Temperaturfühlerbereichs bleiben, der im vorliegenden Beispiel im unteren Anschlussende der Kontaktleiter durch einen Temperaturfühler 5 angedeutet Ist.In the present example, the heating conductors are 8.1, 8.2 as Carbonheizleiter and the Additional conductor 1 formed as a rectilinear detection conductor. This arrangement but is not mandatory, but it can be modified by case by metallic heating conductors or other heating conductor materials. Also, the additional ladder in However, they should be routed through the heating element at any angle remain outside the temperature sensing range, which in this example is lower terminal end of the contact conductor indicated by a temperature sensor 5 Is.

Aus Fig. 2 ist ein Ausschnitt des Heizelementes in Querschnittsform dargestellt. Hier liegen die Kontaktleiter 3 und die Carbonheizleiter 8 als Filamente vor. Der Zusalzleiter besteht aus einem Detektionsleiter 1 der in seinem Kern aus einem Stahlfilament 7 besteht, das mit einem Überzugsmaterial aus einer Schmelzisolierung 6 versehen ist. From Fig. 2, a section of the heating element is shown in cross-sectional shape. Here the contact conductors 3 and the carbon heating conductors 8 are present as filaments. The salt conductor consists of a detection conductor 1 in its core of a steel filament. 7 which is provided with a coating material of a melt insulation 6.

Wenn nun das Überzugsmaterial bei einer entsprechenden Temperatur der Carbonheizleiter 8 schmilzt, kommen die Stahlfilamente 7 in Kontakt mit den unter Strom stehenden Carbonheizleitern 8. Dadurch wird ein Signal zu der Auswerteschaltung 11 gegeben, so dass die Stromzuführung für das Heizelement unterbrochen werden kann. Damit ist die Gefahr einer Überhitzung des Heizelementes beseitigt.Now, if the coating material at a corresponding temperature of the Carbonheizleiter 8 melts, come the steel filaments 7 in contact with the below Current standing Carbonheizleitern 8. This is a signal to the Evaluation circuit 11 given, so that the power supply for the heating element can be interrupted. This is the risk of overheating of the heating element eliminated.

Die erfindungsgemäße Überwachungseinrichtung besteht somit aus den Zusatzleitern in Form von Detektionsleitern 1 und der Auswerteschaltung 11. Sie ist daher verhältnismäßig leicht in ein Heizelement einzubringen und verursacht kaum zusätzliche Kosten. Aufgrund ihres einfachen Aufbaus ist die erfindungsgemäße Überwachungseinrichtung störunanfällig und bietet während der gesamten Lebensdauer eines Flächenheizelementes einen sicheren Schutz gegen übermäßige Erwärmung.The monitoring device according to the invention thus consists of the additional conductors in the form of detection conductors 1 and the evaluation circuit 11. It is therefore relatively easy to introduce in a heating element and hardly causes additional costs. Due to its simple structure is the inventive Monitoring device is immune to interference and provides throughout the entire Lifetime of a panel heater safe protection against excessive Warming.

Claims (10)

Kontroll- und Überwachungseinrichtung zur Vermeidung von Schäden durch Überhitzungen bei flexiblen, textilen Flächenheizelementen, die aus mindestens zwei sich gegenüberliegenden Kontaktleitern (3.1, 3.2) aus elektrisch leitfähigen, unisolierlen Fasern oder Drähten, zwischen denen mehrere Heizleiter (8) verlaufen, welche mit den Kontaktleitern (3.1, 3.2) und einer Strom-Spannungsquelle elektrisch leitend verbunden sind, und aus einem Grundmaterial bestehen, dadurch gekennzeichnet, dass mindestens ein elektrischer Zusatzleiter (1) entlang mindestens einem Kontaktleiter über die Heizleiter (8) geführt ist, wobei der Zusatzleiter (1) mit einem Überzugsmaterial elektrisch isoliert und mit einer elektrischen oder elektronischen Auswerteschaltung (11) verbunden ist, dass das Überzugsmaterial einen Schmelzpunkt oder Erweichungsintervall aufweist, das oberhalb der üblichen Heiztemperatur des Flächenheizelementes aber unterhalb einer zulässigen thermischen Grenztemperatur der umliegenden Materialien und des Grundmaterials (12) liegt, wobei im Falle einer Überhitzung das Überzugsmaterial schmilzt und die Heizleiter (8.1, 8.2) mit dem Zusatzleiter einen elektrischen Kontakt bilden, über den für die Kontrolle der Überhitzung ein Strom zur elektrischen oder elektronischen Auswerteeinheit fließt, die mit der Strom-Spannungsquelle verbunden ist.Control and monitoring device to prevent damage from overheating in flexible, textile Flächenheizelementen consisting of at least two opposing contact conductors (3.1, 3.2) of electrically conductive, unisolierlen fibers or wires, between which several heating conductors (8) extend, which with the contact conductors (3.1, 3.2) and a current-voltage source are electrically connected, and consist of a base material, characterized in that at least one additional electrical conductor (1) along at least one contact conductor via the heating conductor (8) is guided, wherein the additional conductor (1 ) is electrically insulated with a coating material and connected to an electrical or electronic evaluation circuit (11) that the coating material has a melting point or softening, but above the usual heating temperature of the Flächenheizelementes below a permissible thermal limit temperature of umli In the event of overheating, the coating material melts and the heating conductors (8.1, 8.2) form an electrical contact with the additional conductor, over which a current flows to the electrical or electronic evaluation unit for controlling the overheating. which is connected to the current voltage source. Überwachungseinrichtung für Heizelemente nach Anspruch 1, dadurch gekennzeichnet, dass die Kontaktleiter (3.1, 3.2) aus metallischen Litzen und die Heizleiter (8.1, 8.2) aus sich in Abständen jeweils berührende wellenförmig verlaufende Kohlenfasern bestehen.Monitoring device for heating elements according to claim 1, characterized in that the contact conductors (3.1, 3.2) of metallic strands and the heating conductors (8.1, 8.2) consist of intermittently in each case contacting corrugated extending carbon fibers. Überwachungseinrichtung nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, dass der Zusatzleiter (1) im Inneren aus einem Filament (7) aus Stahl besteht. Monitoring device according to one of claims 1 and 2, characterized in that the additional conductor (1) in the interior of a filament (7) consists of steel. Überwachungseinrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Isolierung (6) des Zusatzleiters (1) einen Schmelzpunkt zwischen 110°C. und 150°C aufweist.Monitoring device according to one of claims 1 to 3, characterized in that the insulation (6) of the additional conductor (1) has a melting point between 110 ° C. and 150 ° C. Überwachungseinrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass sowohl die Heizleiter (8.1, 8.2) als auch die Kontaktleiter (3.1, 3.2) in ein textiles Grundmaterial eingewirkt sind und der Zusatzleiter (1) nachträglich nach dem Wirkprozess auf die Heizleiter (8.1, 8.2) aufgebracht ist.Monitoring device according to one of claims 1 to 4, characterized in that both the heating conductors (8.1, 8.2) and the contact conductors (3.1, 3.2) are acted upon in a textile base material and the additional conductor (1) subsequently after the active process on the heating conductors ( 8.1, 8.2) is applied. Überwachungseinrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass sowohl die Heizleiter (8.1, 8.2) und die Kontaktleiter (3.1, 3.2) als auch der Zusatzleiter (1) auf ein textiles Grundmaterial (12) aufgenäht sind.Monitoring device according to one of claims 1 to 5, characterized in that both the heating conductors (8.1, 8.2) and the contact conductors (3.1, 3.2) and the additional conductor (1) are sewn onto a textile base material (12). Überwachungseinrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der Zusatzleiter (1) wellenförmig in der Ebene des Heizelementes (4) verläuft.Monitoring device according to one of claims 1 to 6, characterized in that the additional conductor (1) extends undulating in the plane of the heating element (4). Überwachungseinrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass der Zusatzleiter (1) aus einem textilen Faden besteht, welcher in Richtung seiner Achse mit einem oder mehreren elektrisch leitenden Metallbändem umwickelt und anschließend isoliert ist.Monitoring device according to one of claims 1 to 7, characterized in that the additional conductor (1) consists of a textile thread, which is wrapped in the direction of its axis with one or more electrically conductive Metallbändem and then isolated. Überwachungseinrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Auswerteeinheit (11) mit einem Steuergerät für die Trennung der Strom-Spannungsquelle von den Zufuhrleitungen (9, 10) verbunden ist.Monitoring device according to one of claims 1 to 8, characterized in that the evaluation unit (11) is connected to a control device for the separation of the current-voltage source from the supply lines (9, 10). Überwachungseinrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass das Steuergerät als Regelgerät für die Betriebstemperatur des Heizelementes ausgebildet ist.Monitoring device according to one of claims 1 to 9, characterized in that the control device is designed as a control device for the operating temperature of the heating element.
EP05006383A 2004-05-29 2005-03-23 Monitoring device suitable for flexible heating elements Expired - Fee Related EP1601235B1 (en)

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EP1601235A3 (en) 2007-08-29
US7067776B2 (en) 2006-06-27
DE102004026458A1 (en) 2006-01-05
DE502005010827D1 (en) 2011-02-24
US20050263519A1 (en) 2005-12-01

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