EP1182908B1 - PTC-Heating device employing adhesive - Google Patents

PTC-Heating device employing adhesive Download PDF

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Publication number
EP1182908B1
EP1182908B1 EP00118502A EP00118502A EP1182908B1 EP 1182908 B1 EP1182908 B1 EP 1182908B1 EP 00118502 A EP00118502 A EP 00118502A EP 00118502 A EP00118502 A EP 00118502A EP 1182908 B1 EP1182908 B1 EP 1182908B1
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EP
European Patent Office
Prior art keywords
ptc
heating device
adhesive
elements
sides
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP00118502A
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German (de)
French (fr)
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EP1182908A1 (en
Inventor
Franz Bohlender
Kurt Walz
Josef David
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.)
Catem GmbH and Co KG
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Catem GmbH and Co KG
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 Catem GmbH and Co KG filed Critical Catem GmbH and Co KG
Priority to AT00118502T priority Critical patent/ATE238639T1/en
Priority to EP00118502A priority patent/EP1182908B1/en
Priority to ES00118502T priority patent/ES2194658T3/en
Priority to DE50001877T priority patent/DE50001877D1/en
Priority to JP2001245467A priority patent/JP2002141203A/en
Publication of EP1182908A1 publication Critical patent/EP1182908A1/en
Application granted granted Critical
Publication of EP1182908B1 publication Critical patent/EP1182908B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/42—Heating elements having the shape of rods or tubes non-flexible
    • H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material
    • H05B3/50—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material heating conductor arranged in metal tubes, the radiating surface having heat-conducting fins
    • 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
    • H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
    • H05B3/12—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
    • H05B3/14—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material the material being non-metallic

Definitions

  • the invention relates to a PTC heating device according to the Preamble of claim 1.
  • Heaters For use in motor vehicles, especially with consumption-optimized ones Internal combustion engines, heaters or radiators are used Heating of interior and engine used. Heaters, however, are also suitable for other purposes in a wide range of applications, for example for house installations (room air conditioning), industrial plants etc..
  • DE-C1 42 25 990 describes a process for the production of electrical Heaters known that have PTC elements.
  • the PTC elements are glued in the heater.
  • the adhesive is applied to the PTC elements applied separately. This method is disadvantageous in particular, that the manufacturing process of such heaters is very is complex since each PTC element is individually provided with adhesive got to.
  • the object of the invention is therefore to provide a PTC heating device which is easier to manufacture.
  • a PTC heating element constructed in this way is that its manufacturing process is very easy to industrialize. Besides, is the thermal resistance from the PTC element via the adhesive to the outside very low. This is due to a homogeneous connection between the PTC electrode and the contact plate caused by the bumps be balanced.
  • Another advantage of the PTC heating device according to the invention is that the different. Expansion coefficient of the PTC ceramic and the Contact sheets especially thanks to the metal foil with adhesive on both sides be well balanced.
  • the structure according to the invention also causes very good mechanical strength and is especially against environmental influences such as moisture, sulfur and salt and against reagents such as oils, cleaners etc. (according to the basic environmental test procedures according to DIN IEC 68, part 2 - ff.) Resistant.
  • Such a heating strip made of PTC elements with a frame as a stable support is on each side of a PCT element glued with a metal foil coated on both sides with adhesive.
  • Such an intermediate product is particularly easy to handle and allows one extensive industrialization of the manufacture of PTC heating devices.
  • the contact plate can also be designed as a heat-conducting element.
  • FIG. 2 shows an example of an embodiment of the invention Heater.
  • the device consists of a layering or stacking prefabricated radiator assemblies, between which PTC elements for Heat generation are provided.
  • a detailed view of the PTC heater is shown in Figure 1. It contains the mechanical fixation of the PTC elements 3 shown.
  • the PTC elements 3 can be both disc-shaped also be cuboid.
  • There are 3 on both sides of the PTC elements Contact plates 1a, 1b arranged. These contact plates 1a, 1b are used for Power supply for the PTC elements 3.
  • a positioning frame 4 can be provided.
  • Such a position frame is closed, for example, in the lower part of FIG. 3 detect.
  • the position frame shown has four cutouts 5 Recording the PTC elements 3.
  • the number of PTC elements per Position frame can deviate from the representation in FIG. 3 any values accept.
  • the recesses 5 are preferably as openings executed, but they can also be designed in the form of depressions.
  • the position frame 4 is preferably made of plastic, such as, for example Polyamide. To achieve increased mechanical stability, he can with the help reinforced by glass fibers.
  • Low voltage PTC elements are preferably made with a voltage of 12 V to 500 V.
  • the PTC elements are generally thick from 1.4 mm or even only from 1.1 mm.
  • the position frame 4 instructs its side edges have 6 bulges that create a noiseless air flow allow.
  • contact plates or electrodes 1a, 1b are on both sides flat sides of the PTC elements.
  • metal foils 2a, 2b are used, both sides with adhesive are concealed.
  • the metal foil is an electrically conductive foil that for example made of aluminum, copper or brass. This slide is coated on both sides with acrylic adhesive.
  • the metal foil 2a, 2b makes contact with the Adhesive on the one hand the PTC element 3 and on the other hand a contact plate 1a, 1b.
  • the electrically conductive film can also do this be used directly with the heat-conducting element, e.g. a corrugated fin, as shown in Fig. 3, are glued so that the corrugated fin 7 to Heat dissipation and current supply to the PTC elements is used.
  • the contact plate is not directly connected to the PTC elements connected, but via the corrugated fin elements 7.
  • a contact plate preferably arranged between two corrugated fin elements on the each other are connected to PTC elements.
  • PTC elements are with glued to a corrugated fin element, the corrugated fin element is on the the PTC elements opposite side with a contact plate or Electrode plate connected for current introduction (preferably also by means of a metal foil), on the other side of the electrode sheet is one further corrugated fin arranged, which in turn on the opposite side is glued with PTC elements.
  • the contact plate 8 takes over at the same time the function of a radiator sheet.
  • a Lamella end limit 9 with an electrical tab 10 for Power introduction connected in one piece.
  • FIG. 2 shows an embodiment of the heating device according to the invention.
  • the Device consists of a layering or stacking of prefabricated Radiator assemblies that form a total of three heating levels. In this In the exemplary embodiment, a total power of 1000 W is specified. Other Designs have PTC elements with a total output of up to to 2000 W. In such a layered heater, the PTC elements in a "clamping package" with the remaining elements of the heater held. The clamp acts so that it holds all the elements together and stands vertically on the contact surfaces of the PTC element.
  • the outer heating stages each have only one PTC row 11.
  • the middle ones Heating stages have two PTC rows 12.
  • the assemblies are held in a frame made of side rails 14 and longitudinal rails 15. Electrical connecting tabs 16 project laterally through one of the side rails 14 for contacting the contact plates.
  • the metal foil 2a, 2b shown in FIG. 1 is already in the delivery state laminated on both sides with adhesive.
  • the adhesive sides preferably covered with an easy-to-remove silicone paper. In order to unproblematic handling before and during production is guaranteed, since the adhesive with the cover, especially the silicone paper, is not a firm one Connection comes in.
  • the PTC elements are separated, sometimes even handmade, with layers of adhesive. Manufacturing tolerances and However, bumps in these adhesive layers often lead to one poor power line in low voltage applications of 12 up to 42 V, which are caused by unequal adhesive layer thicknesses.
  • the metal foil according to the invention is provided on both sides with an adhesive film.
  • Adhesives are, for example, epoxy glue, silicone glue and acrylic glue suitable.
  • An acrylic adhesive has particularly advantageous properties because it in operation at the elevated heating temperatures becomes soft and the This further reduces the layer thickness of the adhesive film during operation.
  • the adhesive has a layer thickness of 0.01 mm to 0.1 mm, preferably 40 ⁇ m.
  • the industrial production of the metal foils allows the application such thin adhesive layers and thus leads, among other things, to a special one low heat transfer resistance from the PTC elements to the Heat-conducting elements.
  • the PTC heating strip is then attached to the contact plates 1a and 1b attached.
  • the contact plates act on corrugated fin elements (so-called fins).
  • fins corrugated fin elements
  • This installation of a PTC heating device according to the invention is dispensed with any coating processes for fastening the PTC elements.
  • the Use of prefabricated, narrow metal foil strips, which are used on both sides Are provided, allows extensive automation and Simplification of the manufacturing process.
  • Fig. 4 gives an exploded view of a heating strip according to the invention again.
  • a PTC heating strip according to the invention consists of a Position frame 4 with recesses 5.
  • the recesses 5 are preferably punched out of the frame 4.
  • the position frame 4 is preferably a double T plastic profile.
  • FIGS. 3 and 4 are the T-ends 6 each on the long sides of the frame arranged.
  • PTC elements 3 are in the recesses in this position frame used.
  • the PTC elements 3 on the top and bottom provided with double-sided adhesive metal foils 2a, 2b.
  • the PTC heating strip produced in this way enables a particularly simple, Industrialized production of a PTC heating device according to the invention.

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  • Resistance Heating (AREA)
  • Direct Air Heating By Heater Or Combustion Gas (AREA)
  • Thermistors And Varistors (AREA)
  • Apparatuses And Processes For Manufacturing Resistors (AREA)

Abstract

The device has at least one PTC element (3) and two contact plates (1a,1b) that contact the PTC element. A metal foil (2a,2b) that is coated with adhesive on both sides is provided for connecting the surface of the PTC element to the contact plates. The contact plate is a heat conducting element, preferably a corrugated strip. Independent claims are also included for the following: a PTC heating strip for a PTC heating device.

Description

Die Erfindung bezieht sich auf eine PTC-Heizvorrichtung gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a PTC heating device according to the Preamble of claim 1.

Für den Einsatz in Kraftfahrzeugen, insbesondere mit verbrauchsoptimierten Verbrennungsmotoren, werden Heizvorrichtungen bzw. Radiatoren zur Beheizung von Innenraum und Motor verwendet. Heizvorrichtungen sind jedoch auch für andere Einsatzzwecke in einem weiten Anwendungsbereich geeignet, beispielsweise für Hausinstallationen (Raumklimatisierung), Industrieanlagen u.dgl.For use in motor vehicles, especially with consumption-optimized ones Internal combustion engines, heaters or radiators are used Heating of interior and engine used. Heaters, however, are also suitable for other purposes in a wide range of applications, for example for house installations (room air conditioning), industrial plants etc..

Aus DE-C1 42 25 990 ist ein Verfahren zur Herstellung von elektrischen Heizvorrichtungen bekannt, die PTC-Elemente aufweisen. Die PTC-Elemente werden in der Heizvorrichtung verklebt. Dabei wird der Kleber jeweils auf die PTC-Elemente separat aufgetragen. Nachteilig an diesem Verfahren ist insbesondere, dass der Fertigungsprozess solcher Heizvorrichtungen sehr aufwendig ist, da jedes PTC-Element einzeln mit Klebstoff versehen werden muss.DE-C1 42 25 990 describes a process for the production of electrical Heaters known that have PTC elements. The PTC elements are glued in the heater. The adhesive is applied to the PTC elements applied separately. This method is disadvantageous in particular, that the manufacturing process of such heaters is very is complex since each PTC element is individually provided with adhesive got to.

Aufgabe der Erfindung ist es daher, eine PTC-Heizvorrichtung anzugeben, die einfacher herstellbar ist.The object of the invention is therefore to provide a PTC heating device which is easier to manufacture.

Diese Aufgabe wird mit den Merkmalen des Patentanspruchs 1 für eine PTC-Heizvorrichtung und mit den Merkmalen des Patentanspruchs 5 für einen PTC-Heizstreifen zum Einbau in eine Heizvorrichtung gelöst. This object is achieved with the features of claim 1 for a PTC heating device and with the features of claim 5 for a PTC heating strip solved for installation in a heating device.

Erfindungsgemäß wird nicht jedes PTC-Element separat mit einem Klebstoffauftrag versehen, sondern bei der Herstellung werden zur Befestigung und Kontaktierung der PTC-Elemente beidseitig mit Klebstoff beschichtete Metallfolien verwendet. Durch die Verwendung solcher vorgefertigter, selbstklebenden Metallfolien zur Verbindung der PTC-Elemente mit den auf beiden Seiten der PTC-Elemente angeordneten Kontaktblechen bzw. Elektroden, wird die Montage und damit die Herstellung von PTC-Heizvorrichtungen deutlich vereinfacht.According to the invention, not every PTC element is separated with a Apply glue, but during manufacture are used for fastening and contacting the PTC elements coated on both sides with adhesive Metal foils used. By using such pre-made, self-adhesive metal foils for connecting the PTC elements to the Contact plates arranged on both sides of the PTC elements or Electrodes, the assembly and thus the manufacture of PTC heaters significantly simplified.

Besonders vorteilhaft an einem solchermaßen aufgebauten PTC-Heizelement ist, dass sein Herstellungsverfahren sehr gut industrialisierbar ist. Außerdem ist der Wärmewiderstand von dem PTC-Element über die Verklebung nach außen sehr gering. Dies wird durch eine homogene Verbindung zwischen der PTC-Elektrode und dem Kontaktblech hervorgerufen, bei der Unebenheiten ausgeglichen werden.Particularly advantageous on a PTC heating element constructed in this way is that its manufacturing process is very easy to industrialize. Besides, is the thermal resistance from the PTC element via the adhesive to the outside very low. This is due to a homogeneous connection between the PTC electrode and the contact plate caused by the bumps be balanced.

Ein weiterer Vorteil der erfindungsgemäßen PTC-Heizvorrichtung ist, dass die unterschiedlichen. Ausdehnungskoeffizienten der PTC-Keramik und der Kontaktbleche durch die beidseitig mit Klebstoff versehene Metallfolie besonders gut ausgeglichen werden. Der erfindungsgemäße Aufbau bewirkt zudem eine sehr gute mechanische Festigkeit und ist insbesondere gegen Umwelteinflüsse wie Feuchte, Schwefel und Salz und gegen Reagenzien wie Öle, Reiniger usw. (entsprechend den grundlegenden Umweltprüfverfahren gemäß DIN IEC 68, Teil 2 - ff.) resistent.Another advantage of the PTC heating device according to the invention is that the different. Expansion coefficient of the PTC ceramic and the Contact sheets especially thanks to the metal foil with adhesive on both sides be well balanced. The structure according to the invention also causes very good mechanical strength and is especially against environmental influences such as moisture, sulfur and salt and against reagents such as oils, cleaners etc. (according to the basic environmental test procedures according to DIN IEC 68, part 2 - ff.) Resistant.

Durch die Verwendung eines PTC-Heizstreifens wird die Herstellung einer Heizvorrichtung besonders einfach. Ein solcher Heizstreifen aus PTC-Elementen mit einem Positionsrahmen als stabilem Träger ist auf jeder Seite eines PCT-Elementes mit einer zweiseitig mit Klebstoff beschichteten Metallfolie verklebt. Ein solches Zwischenprodukt ist besonders leicht handhabbar und erlaubt eine weitgehende Industrialisierung der Herstellung von PTC-Heizvorrichtungen. By using a PTC heating strip, the production of a Heater particularly easy. Such a heating strip made of PTC elements with a frame as a stable support is on each side of a PCT element glued with a metal foil coated on both sides with adhesive. Such an intermediate product is particularly easy to handle and allows one extensive industrialization of the manufacture of PTC heating devices.

Das Kontaktblech kann auch als Wärmeleitelement ausgebildet sein. Durch dieses direkte Verkleben der Komponenten einer PTC-Heizvorrichtung, nämlich der PTC-Elemente mit beispielsweise einer Wellrippe, ist eine besonders effiziente Herstellung einer solchen Vorrichtung möglich.The contact plate can also be designed as a heat-conducting element. By this direct gluing of the components of a PTC heater, namely of the PTC elements, for example with a corrugated fin, is one of them efficient production of such a device possible.

Weitere vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand von Unteransprüchen.Further advantageous embodiments of the invention are the subject of Dependent claims.

Bevorzugte Ausgestaltungen der Erfindung werden nachfolgend unter Bezugnahme auf die Figuren näher erläutert.

Fig. 1
zeigt eine Detailansicht eines erfindungsgemäßen Aufbaus der PTC-Heizvorrichtung.
Fig. 2
zeigt eine Gesamtansicht eines Beispiels für eine PTC-Heizvorrichtung.
Fig. 3
stellt eine Detailansicht einer PTC-Heizvorrichtung mit einem Wärmeleitelement und einem Positionsrahmen dar.
Fig. 4
zeigt eine Explosionsdarstellung eines erfindungsgemäßen PTC-Heizstreifens zur Verwendung in einer PTC-Heizvorrichtung.
Preferred embodiments of the invention are explained in more detail below with reference to the figures.
Fig. 1
shows a detailed view of an inventive construction of the PTC heating device.
Fig. 2
shows an overall view of an example of a PTC heater.
Fig. 3
represents a detailed view of a PTC heating device with a heat-conducting element and a position frame.
Fig. 4
shows an exploded view of a PTC heating strip according to the invention for use in a PTC heating device.

Im folgenden werden bevorzugte Ausgestaltungen der Erfindung näher beschrieben.Preferred embodiments of the invention are described in more detail below described.

Fig. 2 zeigt ein Beispiel für eine Ausgestaltung der erfindungsgemäßen Heizvorrichtung. Die Vorrichtung besteht aus einer Schichtung oder Stapelung vorgefertigter Radiatorbaugruppen, zwischen denen PTC-Elemente zur Wärmeerzeugung vorgesehen sind. Eine Detailansicht der PTC-Heizvorrichtung ist in Figur 1 wiedergegeben. Darin ist die mechanische Fixierung der PTC-Elemente 3 dargestellt. Die PTC-Elemente 3 können sowohl scheibenförmig als auch quaderförmig ausgebildet sein. Beidseitig der PTC-Elemente 3 sind Kontaktbleche 1a, 1b angeordnet. Diese Kontaktbleche 1a, 1b dienen der Stromversorgung der PTC-Elemente 3. Zur Fixierung der Lage der PTC-Elemente 3 kann ein Positionsrahmen 4 vorgesehen sein.2 shows an example of an embodiment of the invention Heater. The device consists of a layering or stacking prefabricated radiator assemblies, between which PTC elements for Heat generation are provided. A detailed view of the PTC heater is shown in Figure 1. It contains the mechanical fixation of the PTC elements 3 shown. The PTC elements 3 can be both disc-shaped also be cuboid. There are 3 on both sides of the PTC elements Contact plates 1a, 1b arranged. These contact plates 1a, 1b are used for Power supply for the PTC elements 3. To fix the position of the PTC elements 3, a positioning frame 4 can be provided.

Ein solcher Positionsrahmen ist zum Beispiel im unteren Teil der Fig. 3 zu erkennen. Der gezeigte Positionsrahmen weist vier Aussparungen 5 zur Aufnahme der PTC-Elemente 3 auf. Die Anzahl der PTC-Elemente pro Positionsrahmen kann abweichend von der Darstellung in Fig. 3 beliebige Werte annehmen. Die Aussparungen 5 sind bevorzugterweise als Durchbrüche ausgeführt, sie können jedoch auch in Form von Vertiefungen ausgebildet sein. Vorzugsweise besteht der Positionsrahmen 4 aus Kunststoff, wie beispielsweise Polyamid. Zur Erzielung einer erhöhten mechanischen Stabilität kann er mit Hilfe von Glasfasern verstärkt werden.Such a position frame is closed, for example, in the lower part of FIG. 3 detect. The position frame shown has four cutouts 5 Recording the PTC elements 3. The number of PTC elements per Position frame can deviate from the representation in FIG. 3 any values accept. The recesses 5 are preferably as openings executed, but they can also be designed in the form of depressions. The position frame 4 is preferably made of plastic, such as, for example Polyamide. To achieve increased mechanical stability, he can with the help reinforced by glass fibers.

Die in den Aussparungen 5 eines Positionsrahmens 4 angeordneten Niederspannungs-PTC-Elemente werden vorzugsweise mit einer Spannung von 12 V bis 500 V betrieben. Die PTC-Elemente weisen im allgemeinen eine Dicke von 1,4 mm oder sogar nur von 1,1mm auf. Der Positionsrahmen 4 weist an seinen Seitenkanten 6 Wölbungen auf, die eine geräuschfreie Luftströmung erlauben.The arranged in the recesses 5 of a frame 4 Low voltage PTC elements are preferably made with a voltage of 12 V to 500 V. The PTC elements are generally thick from 1.4 mm or even only from 1.1 mm. The position frame 4 instructs its side edges have 6 bulges that create a noiseless air flow allow.

Zur Befestigung und Kontaktierung der PTC-Elemente 3 sind beiderseits der flachen Seiten der PTC-Elemente Kontaktbleche bzw. Elektroden 1a, 1b angeordnet. Um die PTC-Elemente 3 mit den Kontaktblechen 1a, 1b zu verbinden, werden Metallfolien 2a, 2b verwendet, die beidseitig mit Klebstoff kaschiert sind.To attach and contact the PTC elements 3 are on both sides flat sides of the PTC elements, contact plates or electrodes 1a, 1b arranged. To the PTC elements 3 with the contact plates 1a, 1b connect, metal foils 2a, 2b are used, both sides with adhesive are concealed.

Bei der Metallfolie handelt es sich um eine elektrisch leitfähige Folie, die beispielsweise aus Aluminium, Kupfer oder Messing gefertigt ist. Diese Folie ist beidseitig mit Acrylkleber beschichtet. Die Metallfolie 2a, 2b kontaktiert mit dem Kleber einerseits das PTC-Element 3 und andererseits ein Kontaktblech 1a, 1b. In einer weiteren Anwendung kann die elektrisch leitfähige Folie auch dazu verwendet werden, direkt mit dem wärmeleitenden Element, z.B. einer Wellrippe, wie sie in Fig. 3 dargestellt ist, verklebt werden, so daß die Wellrippe 7 zur Wärmeabgabe und zur Stromführung zu den PTC-Elementen dient. Das Kontaktblech wird in diesen Fällen nicht direkt mit den PTC-Elementen verbunden, sondern über die Wellrippenelemente 7. Dazu wird ein Kontaktblech vorzugsweise zwischen zwei Wellrippenelementen angeordnet, die auf der jeweils anderen Seite mit PTC-Elementen verbunden sind. Ein solcher Aufbau weist folgende Anordnungen von Elementen auf: Die PTC-Elemente werden mit einem Wellrippenelement verklebt, das Wellrippenelement ist auf der den PTC-Elementen gegenüberliegenden Seite mit einem Kontaktblech bzw. Elektrodenblech zur Stromeinleitung verbunden (vorzugsweise ebenfalls mittels einer Metallfolie verklebt), auf der anderen Seite des Elektrodenbleches ist eine weitere Wellrippe angeordnet, die auf der gegenüberliegenden Seite wiederum mit PTC-Elementen verklebt ist. Eine solche Ausführungsform benötigt deutlich weniger Elektrodenbleche als herkömmliche Heizvorrichtungen.The metal foil is an electrically conductive foil that for example made of aluminum, copper or brass. This slide is coated on both sides with acrylic adhesive. The metal foil 2a, 2b makes contact with the Adhesive on the one hand the PTC element 3 and on the other hand a contact plate 1a, 1b. In another application, the electrically conductive film can also do this be used directly with the heat-conducting element, e.g. a corrugated fin, as shown in Fig. 3, are glued so that the corrugated fin 7 to Heat dissipation and current supply to the PTC elements is used. The In these cases, the contact plate is not directly connected to the PTC elements connected, but via the corrugated fin elements 7. For this purpose, a contact plate preferably arranged between two corrugated fin elements on the each other are connected to PTC elements. Such a structure has the following arrangements of elements: The PTC elements are with glued to a corrugated fin element, the corrugated fin element is on the the PTC elements opposite side with a contact plate or Electrode plate connected for current introduction (preferably also by means of a metal foil), on the other side of the electrode sheet is one further corrugated fin arranged, which in turn on the opposite side is glued with PTC elements. Such an embodiment clearly requires fewer electrode sheets than conventional heaters.

In Fig. 3 ist auf der Unterseite einer Wellrippe 7 ein Kontaktblech 8 zu erkennen. In der dargestellten Ausgestaltung übernimmt das Kontaktblech 8 gleichzeitig die Funktion eines Radiatorbleches. Zu diesem Zweck ist eine Lamellenendbegrenzung 9 mit einer elektrischen Anschlußfahne 10 zur Stromeinleitung einstückig verbunden. In einer anderen Ausgestaltung können Radiatorblech und Kontaktblech separat voneinander vorgesehen sein.3 shows a contact plate 8 on the underside of a corrugated fin 7. In the illustrated embodiment, the contact plate 8 takes over at the same time the function of a radiator sheet. For this purpose is a Lamella end limit 9 with an electrical tab 10 for Power introduction connected in one piece. In another embodiment, you can Radiator plate and contact plate can be provided separately from each other.

Figur 2 zeigt eine Ausgestaltung der erfindungsgemäßen Heizvorrichtung. Die Vorrichtung besteht aus einer Schichtung oder Stapelung vorgefertigter Radiatorbaugruppen, die insgesamt drei Heizstufen bilden. In diesem Ausführungsbeispiel wird eine Gesamtleistung von 1000 W vorgegeben. Andere Ausgestaltungen verfügen über PTC-Elemente mit einer Gesamtleistung von bis zu 2000 W. In einer solchen geschichteten Heizvorrichtung werden die PTC-Elemente in einem "Klemmpaket" mit den übrigen Elementen der Heizvorrichtung gehalten. Die Klemmung wirkt dabei so, dass sie alle Elemente zusammenhält und steht vertikal auf den Kontaktoberflächen des PTC-Elementes.Figure 2 shows an embodiment of the heating device according to the invention. The Device consists of a layering or stacking of prefabricated Radiator assemblies that form a total of three heating levels. In this In the exemplary embodiment, a total power of 1000 W is specified. Other Designs have PTC elements with a total output of up to to 2000 W. In such a layered heater, the PTC elements in a "clamping package" with the remaining elements of the heater held. The clamp acts so that it holds all the elements together and stands vertically on the contact surfaces of the PTC element.

Die äußeren Heizstufen weisen jeweils nur eine PTC-Reihe 11 auf. Die mittleren Heizstufen weisen zwei PTC-Reihen 12 auf. Dabei sind die Elektrodenbleche der mittleren Baugruppen mittels einer Brücke 13 verbunden. Die Baugruppen werden in einem Rahmen aus Seitenholmen 14 und Längsholmen 15 gehalten. Elektrische Anschlußlaschen 16 ragen seitlich durch einen der Seitenholme 14 zur Kontaktierung der Kontaktbleche.The outer heating stages each have only one PTC row 11. The middle ones Heating stages have two PTC rows 12. Here are the electrode sheets the middle modules connected by a bridge 13. The assemblies are held in a frame made of side rails 14 and longitudinal rails 15. Electrical connecting tabs 16 project laterally through one of the side rails 14 for contacting the contact plates.

Die in Fig. 1 dargestellte Metallfolie 2a, 2b ist schon im Anlieferzustand beidseitig mit Klebstoff kaschiert. Bei der Anlieferung werden die Klebeseiten vorzugsweise mit einem leicht zu entfernenden Silikonpapier abgedeckt. Damit ist eine unproblematische Handhabung vor und bei der Fertigung gewährleistet, da der Klebstoff mit der Abdeckung, insbesondere dem Silikonpapier, keine feste Verbindung eingeht.The metal foil 2a, 2b shown in FIG. 1 is already in the delivery state laminated on both sides with adhesive. When delivered, the adhesive sides preferably covered with an easy-to-remove silicone paper. In order to unproblematic handling before and during production is guaranteed, since the adhesive with the cover, especially the silicone paper, is not a firm one Connection comes in.

Bei herkömmlichen Verfahren werden die PTC-Elemente separat, manchmal sogar in Handarbeit, mit Klebstoffschichten versehen. Fertigungstoleranzen und Unebenheiten dieser Klebstoffschichten führen jedoch häufig zu einer schlechten Stromleitung bei Anwendungen im Niederspannungsbereich von 12 bis 42 V, die durch ungleiche Klebeschichtstärken verursacht werden. Die erfindungsgemäße Metallfolie ist beidseitig mit einem Klebefilm versehen. Als Klebstoff sind beispielsweise Epoxy-Kleber, Silikonkleber und Acrylkleber geeignet. Ein Acrylkleber weist besonders vorteilhafte Eigenschaften auf, da er im Betrieb bei den erhöhten Heiztemperaturen weich wird und sich die Schichtdicke des Klebefilms dadurch im Betrieb weiter vermindert.In conventional methods, the PTC elements are separated, sometimes even handmade, with layers of adhesive. Manufacturing tolerances and However, bumps in these adhesive layers often lead to one poor power line in low voltage applications of 12 up to 42 V, which are caused by unequal adhesive layer thicknesses. The The metal foil according to the invention is provided on both sides with an adhesive film. As Adhesives are, for example, epoxy glue, silicone glue and acrylic glue suitable. An acrylic adhesive has particularly advantageous properties because it in operation at the elevated heating temperatures becomes soft and the This further reduces the layer thickness of the adhesive film during operation.

Der Kleber weist eine Schichtdicke von 0,01 mm bis 0,1 mm auf, vorzugsweise 40 µm. Die industrialisierte Herstellung der Metallfolien erlaubt das Auftragen solch dünner Klebeschichten und führt damit unter anderem zu einem besonders geringen Wärmeübergangswiderstand von den PTC-Elementen zu den Wärmeleitelementen.The adhesive has a layer thickness of 0.01 mm to 0.1 mm, preferably 40 µm. The industrial production of the metal foils allows the application such thin adhesive layers and thus leads, among other things, to a special one low heat transfer resistance from the PTC elements to the Heat-conducting elements.

Nachdem die Klebeschicht sehr dünn gehalten werden kann, erreicht man auch dann für den Niederspannungsbereich ausreichende Stromstärken, wenn der spezifische elektrische Widerstand relativ hoch liegt, so daß man diesen Kleber schon als elektrischen "Nichtleiter" bezeichnen würde.After the adhesive layer can be kept very thin, you can also reach then sufficient amperages for the low voltage range if the specific electrical resistance is relatively high, so that you can use this adhesive would already be referred to as an electrical "non-conductor".

Zur Herstellung einer erfindungsgemäßen PTC-Heizvorrichtung wird zunäcsht eine Seite des Positionsrahmens 4 abgeklebt. Anschließend werden die PTC-Elemente 3 in die Aussparungen 5 des Positionsrahmens 4 eingesetzt. Schließlich wird die gegenüberliegende Seite abgeklebt. Dazu werden die obengenannten beidseitig mit Klebstoff beschichteten Metallfolien 2a und 2b verwendet. Dieses Zwischenprodukt eines PTC-Heizstreifens ist sehr gut handhabbar und erlaubt, den Herstellungsprozess einer PTC-Heizvorrichtung zum mechanisieren, denn dieses Zwischenprodukt ist besonders leicht industriell herstellbar.To produce a PTC heating device according to the invention is first added one side of the frame 4 taped. Then the PTC elements 3 inserted into the recesses 5 of the frame 4. Finally the opposite side is taped. To do this, the Above-mentioned metal foils 2a and 2b coated on both sides with adhesive used. This intermediate product of a PTC heating strip is very good manageable and allows the manufacturing process of a PTC heater to mechanize, because this intermediate product is particularly light industrial produced.

Anschließend wird der PTC-Heizstreifen jeweils an den Kontaktblechen 1a und 1b befestigt. Bei den Kontaktblechen kann es sich, wie zuvor erwähnt, ebenfalls um Wellrippenelemente (sogenannten Fins) handeln. Die Arbeitsschritte müssen nicht in dieser Reihenfolge durchgeführt werden, auch jede andere Reihenfolge ist möglich.The PTC heating strip is then attached to the contact plates 1a and 1b attached. As previously mentioned, it can also be the case with the contact plates act on corrugated fin elements (so-called fins). The work steps must not be done in that order, any other order is possible.

Bei dieser erfindungsgemäßen Montage einer PTC-Heizvorrichtung entfallen jegliche Beschichtungsvorgänge zur Befestigung der PTC-Elemente. Die Verwendung vorgefertigter, schmaler Metallfolienstreifen, die beidseitig mit Klebstoff versehen sind, erlaubt eine weitgehende Automatisierung und Vereinfachung des Herstellungsverfahrens. This installation of a PTC heating device according to the invention is dispensed with any coating processes for fastening the PTC elements. The Use of prefabricated, narrow metal foil strips, which are used on both sides Are provided, allows extensive automation and Simplification of the manufacturing process.

Fig. 4 gibt eine Explosionsdarstellung eines erfindungsgemäßen Heizstreifens wieder. Ein solcher erfindungsgemäßer PTC-Heizstreifen besteht aus einem Positionsrahmen 4 mit Ausnehmungen 5. Die Ausnehmungen 5 sind vorzugsweise aus dem Rahmen 4 ausgestanzt. Der Positionsrahmen 4 ist vorzugsweise ein Doppel-T-Kunststoffprofil. Wie in Fig.3 und Fig. 4 zu erkennen, sind die T-Enden 6 jeweils an den Längsseiten des Positionsrahmens angeordnet.Fig. 4 gives an exploded view of a heating strip according to the invention again. Such a PTC heating strip according to the invention consists of a Position frame 4 with recesses 5. The recesses 5 are preferably punched out of the frame 4. The position frame 4 is preferably a double T plastic profile. As can be seen in FIGS. 3 and 4, are the T-ends 6 each on the long sides of the frame arranged.

In diesem Positionsrahmen sind in die Ausnehmungen 5 PTC-Elemente 3 eingesetzt. Zur mechanischen Fixierung der PTC-Elemente 3 in dem Positionsrahmen 4 werden die PTC-Elemente 3 auf der Ober- und Unterseite mit beidseitig klebenden Metallfolien 2a, 2b versehen.5 PTC elements 3 are in the recesses in this position frame used. For mechanical fixation of the PTC elements 3 in the Position frame 4, the PTC elements 3 on the top and bottom provided with double-sided adhesive metal foils 2a, 2b.

Der so hergestellte PTC-Heizstreifen ermöglicht eine besonders einfache, industrialisierte Herstellung einer erfindungsgemäßen PTC-Heizvorrichtung.The PTC heating strip produced in this way enables a particularly simple, Industrialized production of a PTC heating device according to the invention.

Claims (5)

  1. A PTC heating device comprising at least one PTC element (3) and two contact plates (1a, 1b) contacting said PTC element (3),
    characterized in that
    for connecting the surface of the PTC element (3) to the contact plates (1a, 1b), a metal foil (2a, 2b) is provided, which is coated with an adhesive on both sides thereof.
  2. A PTC heating device according to claim 1, characterized in that the contact plate is implemented as a heat-conductive element, preferably as a corrugation ridge (7).
  3. A PTC heating device according to claim 1 or 2, characterized in that the metal foil consists of aluminium, copper or brass.
  4. A PTC heating device according to one of the claims 1 to 3, characterized in that the PTC heating device comprises a layered structure of PTC elements (3) and heat-conductive elements, the respective heat-conductive elements being each arranged adjacent the flat sides of the PTC element (3).
  5. A PTC heating strip for installation in a PTC heating device, comprising:
    at least one PTC element (3),
    a position frame (4) comprising at least one opening (5) for accommodating the at least one PTC element (3),
    first and second metal foils (2a, 2b) which are coated with an adhesive on both sides thereof and which are respectively glued onto opposed sides of the at least one PTC element (3).
EP00118502A 2000-08-25 2000-08-25 PTC-Heating device employing adhesive Expired - Lifetime EP1182908B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AT00118502T ATE238639T1 (en) 2000-08-25 2000-08-25 PTC HEATER WITH ADHESIVE
EP00118502A EP1182908B1 (en) 2000-08-25 2000-08-25 PTC-Heating device employing adhesive
ES00118502T ES2194658T3 (en) 2000-08-25 2000-08-25 PTC HEATING DEVICE USING AN ADHESIVE.
DE50001877T DE50001877D1 (en) 2000-08-25 2000-08-25 PTC heater with adhesive
JP2001245467A JP2002141203A (en) 2000-08-25 2001-08-13 Ptc-heating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00118502A EP1182908B1 (en) 2000-08-25 2000-08-25 PTC-Heating device employing adhesive

Publications (2)

Publication Number Publication Date
EP1182908A1 EP1182908A1 (en) 2002-02-27
EP1182908B1 true EP1182908B1 (en) 2003-04-23

Family

ID=8169659

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00118502A Expired - Lifetime EP1182908B1 (en) 2000-08-25 2000-08-25 PTC-Heating device employing adhesive

Country Status (5)

Country Link
EP (1) EP1182908B1 (en)
JP (1) JP2002141203A (en)
AT (1) ATE238639T1 (en)
DE (1) DE50001877D1 (en)
ES (1) ES2194658T3 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005008596B3 (en) * 2005-02-23 2006-05-24 Daimlerchrysler Ag A method for heating motor vehicle interiors has a layer system of electrically heated ducts through which air is blown through speed restricting filling
WO2006089672A1 (en) 2005-02-23 2006-08-31 Daimlerchrysler Ag Heating device for heating an airflow in particular for a motor vehicle
US7759610B2 (en) 2003-10-07 2010-07-20 Behr France Rouffach Sas Heating assembly comprising a PTC element, in particular for a motor vehicle
EP2293648A1 (en) 2009-09-02 2011-03-09 Behr France Rouffach SAS Heat exchanger
WO2022171857A1 (en) 2021-02-15 2022-08-18 Tdk Electronics Ag Ptc heating element, electric heater, and use of a ptc heating element

Families Citing this family (16)

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KR100926313B1 (en) * 2003-03-10 2009-11-12 한라공조주식회사 A electric heater
KR100926315B1 (en) * 2003-03-10 2009-11-12 한라공조주식회사 A electric heater
KR100926316B1 (en) * 2003-03-10 2009-11-11 한라공조주식회사 A electric heater
KR100926314B1 (en) * 2003-03-10 2009-11-12 한라공조주식회사 A electric heater
KR100926312B1 (en) * 2003-03-10 2009-11-12 한라공조주식회사 A electric heater
KR100933209B1 (en) * 2003-04-14 2009-12-22 한라공조주식회사 Auxiliary heater and heat exchanger for heating using same
EP1515587B1 (en) * 2003-09-11 2006-12-13 Catem GmbH & Co. KG Electrical heated device with sealed heating element
EP1523226B1 (en) 2003-10-07 2014-12-10 Behr France Rouffach SAS Heating assembly with PTC elements, particularly for motor vehicles
JP4403956B2 (en) * 2004-11-29 2010-01-27 株式会社デンソー Electric heater and vehicle air conditioner
KR100831832B1 (en) 2006-12-27 2008-05-28 모딘코리아 유한회사 Ptc rod assembly
EP2296432B1 (en) * 2009-09-15 2018-01-03 Mahle Behr France Rouffach S.A.S Heat exchanger
EP2393336B1 (en) * 2010-06-04 2017-05-17 Mahle Behr France Rouffach S.A.S Heat exchanger
KR101228437B1 (en) * 2011-02-18 2013-02-01 고범용 Device molding press with which cooling part having thermoelectric and heating part having Positive Temperature Coefficient
CN103517469B (en) 2012-06-27 2015-03-04 比亚迪股份有限公司 PTC electrical heating element, electric heater unit and electric car
FR3072766B1 (en) * 2017-10-24 2020-07-24 Valeo Systemes Thermiques HEATING UNIT, HEAT EXCHANGE BEAM, ELECTRIC HEATING DEVICE AND ASSOCIATED AIR CONDITIONING BOX
DE102022121865A1 (en) 2022-08-30 2024-02-29 Tdk Electronics Ag Monolithic functional ceramic element and method for producing a contact for a functional ceramic

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US5326418A (en) * 1992-04-14 1994-07-05 Yeh Yuan Chang Method of making positive-temperature-coefficient thermistor heating element
DE4225990C1 (en) * 1992-08-06 1993-08-05 Tuerk & Hillinger Gmbh, 7200 Tuttlingen, De Mfg. electrical heating device with PTC elements - joined to heat removing elements by conductive adhesive in inner region but by non-conductive adhesive at outer edges
IL121449A0 (en) * 1997-08-01 1998-02-08 Body Heat Ltd Adhesive composition for electrical PTC heating device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7759610B2 (en) 2003-10-07 2010-07-20 Behr France Rouffach Sas Heating assembly comprising a PTC element, in particular for a motor vehicle
DE102005008596B3 (en) * 2005-02-23 2006-05-24 Daimlerchrysler Ag A method for heating motor vehicle interiors has a layer system of electrically heated ducts through which air is blown through speed restricting filling
WO2006089672A1 (en) 2005-02-23 2006-08-31 Daimlerchrysler Ag Heating device for heating an airflow in particular for a motor vehicle
EP2293648A1 (en) 2009-09-02 2011-03-09 Behr France Rouffach SAS Heat exchanger
WO2022171857A1 (en) 2021-02-15 2022-08-18 Tdk Electronics Ag Ptc heating element, electric heater, and use of a ptc heating element
DE102021103480A1 (en) 2021-02-15 2022-08-18 Tdk Electronics Ag PTC heating element, electric heating device and use of a PTC heating element

Also Published As

Publication number Publication date
ES2194658T3 (en) 2003-12-01
ATE238639T1 (en) 2003-05-15
EP1182908A1 (en) 2002-02-27
DE50001877D1 (en) 2003-05-28
JP2002141203A (en) 2002-05-17

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