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EP0262243B1 - Ptc-heating resistor - Google Patents

Ptc-heating resistor Download PDF

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Publication number
EP0262243B1
EP0262243B1 EP86113472A EP86113472A EP0262243B1 EP 0262243 B1 EP0262243 B1 EP 0262243B1 EP 86113472 A EP86113472 A EP 86113472A EP 86113472 A EP86113472 A EP 86113472A EP 0262243 B1 EP0262243 B1 EP 0262243B1
Authority
EP
European Patent Office
Prior art keywords
ptc
heating element
support profile
profile body
section
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
EP86113472A
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German (de)
French (fr)
Other versions
EP0262243A1 (en
Inventor
Franz Bohlender
Norbert Buchlaub
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.)
DBK David and Baader GmbH
Original Assignee
DBK David and Baader 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 DBK David and Baader GmbH filed Critical DBK David and Baader GmbH
Priority to EP86113472A priority Critical patent/EP0262243B1/en
Priority to DE8686113472T priority patent/DE3677603D1/en
Priority to US07/103,055 priority patent/US4814584A/en
Priority to JP62249046A priority patent/JPS63164193A/en
Publication of EP0262243A1 publication Critical patent/EP0262243A1/en
Application granted granted Critical
Publication of EP0262243B1 publication Critical patent/EP0262243B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/10—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 thermistor heater according to the preamble of claim 1.
  • a heater is known from DE-OS 30 42 420.
  • PTC radiators of the aforementioned type generally contain several flat heating elements which, if necessary by an insulating plate with openings for receiving the heating elements, are kept at a mutual distance and are clamped between two electrode plates which supply the heating elements with current.
  • the heat developed in the PTC heating elements is emitted from their flat sides to the outside, which requires good heat conduction between the PTC heating element and the heat sink as a consumer.
  • the invention has for its object to provide a PTC thermistor of the type mentioned, which is particularly suitable for heating a tubular heat sink.
  • the invention provides a PTC heating element in which, with the aid of the angled edge strips attached to the covering element, the heat absorbed by the covering element is directed in approximately the same direction in which the side of the PTC heating element facing away from the covering element emits its heat.
  • the heat emitted on both sides by the PTC heating element is thus dissipated to essentially one side, where it can be emitted to a heat sink which is accommodated in the channel which is formed in the carrier profile body.
  • This channel can in particular have a semicircular cross section, so that a tube with a circular cross section can be accommodated in it.
  • the individual parts of the radiator can be joined together in a very simple manner, without the need for any bending processes or casting, the individual components only need to be superimposed in a suitable manner and are then clamped together by at least one clamping bracket and secured to each other.
  • the PTC heater consists of a carrier profile body 1, a PTC heater from four PTC resistance elements 2 in the present case (FIG. 2e), a position plate 3 which secures the PTC resistance elements 2 in their position , and upper and lower contact plates 4 and 5 with connecting conductors 6, an insulating film 7, a heat-conducting bracket 8 and a spring clip bracket 9.
  • the carrier profile body 1 consists of a highly thermally conductive material, for example aluminum or copper, and has no bearing surface 10 for receiving the PTC heating element.
  • a channel 11 is formed below the support surface 10, which in the present case has an approximately semicircular cross section.
  • walls 12 extend upwards, which have laterally projecting edges 13 and 14 at their upper and lower ends.
  • a groove 15 is formed between each of these walls 12 and the walls that delimit the channel 11.
  • the position plate 3 has four openings 16, which are intended for receiving the PTC resistance elements 2 and are correspondingly adapted to their sizes.
  • the position plate 3 consists of an insulating material and has notches 17 on both sides of the edges.
  • the Contact plates 4 and 5 have on their longitudinal edges downwardly angled lugs 18 and 19 and cutouts 20 and 21, the lugs and the cutouts on the contact plates being aligned with respect to one another such that after the sandwiching of the contact plates , the position plate and the PTC resistance elements existing PTC heating element and the bending of the flags 18 and 19 do not touch the two contact plates.
  • This structure of the PTC heating element is already known from DE-0S 3D 42 420.
  • the heating element is wrapped by the insulating film 7 (see FIG. 1) and in this state lies on the support surface 10.
  • the insulating film 7 electrically insulates the heating element from the carrier profile body 1, but ensures good heat transfer. It therefore consists of a highly thermally conductive material.
  • the heating element thus insulated is covered by the heat-conducting bracket 8, which consists of a highly heat-conductive material and has a cover plate 22, to which are connected laterally angled edge strips 23 which engage in the grooves 15 in the carrier profile body 1 and on the adjacent walls thereof fit tightly.
  • the heat-conducting bracket 8 is held by the spring clip 9, which is locked on the edges 13 projecting on both sides on the walls 12 of the carrier profile body 1, as FIG. 1 clearly shows.
  • the spring clip 9 is preferably provided in the middle with a bulge 24 which presses elastically on the heat-conducting bracket 8. Possibly.
  • Several such spring clamps can be used if a particularly high compressive force and an associated improvement in the heat transfer to the carrier profile body 1 is desired.
  • the heat given off by the heating element via the contact plates 4 and 5 and the insulating film 7 is absorbed, on the one hand, directly by the carrier profile body 1 and, on the other hand, is removed by the cover plate 22 of the heat-conducting bracket 8, from which it passes over the edge strips 23 in the lower region of the carrier profile body 1 is derived near the channel 11.
  • the carrier profile body 1 can be clamped to a pipe (not shown) with the aid of a comparable spring clip (not shown), which is clamped at the edges 14, in order to give off heat thereon.
  • a comparable spring clip (not shown)
  • the cross section of the channel 11 need not be semicircular, but can also have any other shape adapted to the outline of the body to be heated.
  • Fig. 3 shows a modified embodiment of a carrier profile body 1a, which has two contact surfaces 10 ⁇ and 10 ⁇ with associated walls, grooves, etc., which are arranged at an angle to one another and enclose the channel 11 between them. In this way it is possible to attach two PTC heating elements to the carrier profile body or to carry out a different mounting of the PTC heating element.
  • an insulating film can be dispensed with if the carrier profile body consists of an insulating material, for example a ceramic material.
  • the insulation can also be carried out by means of insulating plates, as is already known per se from the prior art.
  • edge strips 13 and the grooves 15 are matched in their dimensions so that a good fit is achieved, so that sufficiently large thermal bridges arise.
  • a certain elasticity of the material of the carrier profile body can also contribute to this, which permits a slight spreading of the grooves 15 due to a corresponding fit of edge strips and grooves.
  • grooves can also be formed on the wall 12, into each of which one or more suitably designed spring clamps can be locked.

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  • Resistance Heating (AREA)

Description

Die Erfindung bezieht sich auf einen Kaltleiter-PTC-Heizkörper nach dem Oberbegriff des Anspruchs 1. Ein solcher Heizkörper ist aus der DE-OS 30 42 420 bekannt.The invention relates to a PTC thermistor heater according to the preamble of claim 1. Such a heater is known from DE-OS 30 42 420.

PTC-Heizkörper der vorgenannten Art enthalten in aller Regel mehrere flache Heizelemente, die, ggf. von einer Isolierstoffplatte mit darin vorhandenen Durchbrüchen für die Aufnahme der Heizelemente, auf gegenseitigem Abstand gehalten und zwischen zwei Elektrodenplatten eingeklemmt sind, die den Heizelementen Strom zuführen. Die in den PTC-Heizelementen entwickelte Wärme wird von ihren Flachseiten nach außen abgegeben, wozu eine gute Wärmeleitung zwischen dem PTC-Heizkörper und d er Wärmesenke als Verbraucher erforderlich ist.PTC radiators of the aforementioned type generally contain several flat heating elements which, if necessary by an insulating plate with openings for receiving the heating elements, are kept at a mutual distance and are clamped between two electrode plates which supply the heating elements with current. The heat developed in the PTC heating elements is emitted from their flat sides to the outside, which requires good heat conduction between the PTC heating element and the heat sink as a consumer.

Zur Erzielung einer guten Wärmeabführung von einem PTC-Heizkörper ist es aus der DE-AS 20 02 254 bekannt, das die Wärme erzeugende PTC-Heizelement in einem Gehäuse mit Paraffin zu vergießen, so daß die Wärme allseitig von dem Heizelement abgeleitet wird. Auch aus der DE-OS 22 63 020 ist es bekannt, das PTC-Heizelement in einem es umgebenden Gehäuse mittels einer thermisch leitenden, elektrisch isolierenden Masse einzugießen.To achieve good heat dissipation from a PTC heating element, it is known from DE-AS 20 02 254 to shed the heat-generating PTC heating element in a housing with paraffin, so that the heat is dissipated from the heating element on all sides. From DE-OS 22 63 020 it is known to cast the PTC heating element in a surrounding housing by means of a thermally conductive, electrically insulating compound.

Aus der DE-PS 26 14 433 ist es bekannt, die Wärme von flachen PTC-Heizelementen, die innerhalb einer sie umgebenden Hülse angeordnet sind, mit Hilfe von federnden Blechen auf die Hülse zu übertragen, die jeweils einen auf den Heizelementen flach aufliegenden Schenkel und einen gebogenen, an der Hülsenwandung anliegenden Schenkel aufweisen. Auf diese Weise wird eine Wärmeableitung von beiden Seiten der Heizelemente in gleichem Umfang auf die Hülse erreicht.From DE-PS 26 14 433 it is known to transfer the heat from flat PTC heating elements, which are arranged within a sleeve surrounding them, with the aid of resilient sheets to the sleeve, each having a leg lying flat on the heating elements and have a curved leg abutting the sleeve wall. In this way, heat dissipation from both sides of the heating elements is achieved to the same extent on the sleeve.

Es gibt häufig Einsatzfälle, in denen Wärme einseitig auf einen Wärmeverbraucher zu übertragen ist. Ein solches Beispiel ist in der US-PS 40 91 267 dargestellt, in der ein elektrischer Wasserheizer beschrieben ist, bestehend aus einem Gefäß, das von außen mittels eines PTC-Heizkörpers beheizt wird. Dieser Heizkörper ist an einer Steinenwand des Behälters angebracht und enthält ein PTC-Heizelement, das innerhalb eines Gehäuses an der Gehäusewand anliegend angeordnet und in einer keramischen Filmmasse eingebettet ist. Aufgrund unterschiedlicher Wärmeableiteigenschaften zu beiden Seiten des Heizelements kann es bei dieser Anordnung dazu kommen, daß das Heizelement auf der einen Seite wärmer als auf der anderen Seite ist, daher seinen Widerstand entsprechend erhöht und keine optimale Wärmeentwicklung gewährleistet.There are often applications in which heat is to be transferred to a heat consumer on one side. Such an example is shown in US-PS 40 91 267, in which an electric water heater is described, consisting of a vessel that is heated from the outside by means of a PTC heater. This radiator is attached to a stone wall of the container and contains a PTC heating element which is arranged adjacent to the housing wall within a housing and is embedded in a ceramic film. Due to different heat dissipation properties on both sides of the heating element, this arrangement can result in the heating element being warmer on one side than on the other side, therefore increasing its resistance accordingly and not ensuring optimal heat development.

Es gibt weiterhin Einsatzfälle, bei denen Rohrleitungen zu erwärmen sind, beispielsweise die Rektifiziersäule in einer Absorptionskälteanlage, bei denen somit von einem in aller Regel flachen Heizelement Wärme auf eine Wärmesenke mit gewölbter Oberfläche zu übertragen ist. Ein solcher Anwendungsfall ist in bezug auf die Wärmeübertragung extrem ungünstig, weil Wärme von einem zweiseitig abstrahlenden Heizelement auf eine einseitig aufnehmende Wärmesenke übertragen werden muß. Die Gefahr, daß der Selbstbegrenzungseffekt des Heizelements vorzeitig eintritt und daher das Heizvermögen des PTC-Elements nicht optimal ausgenützt wird, ist daher in einem solchen Fall besonders groß.There are also applications in which pipes have to be heated, for example the rectification column in an absorption refrigeration system, in which heat is therefore to be transferred from a generally flat heating element to a heat sink with a curved surface. Such an application is extremely unfavorable with regard to heat transfer, because heat has to be transferred from a two-sided radiating heating element to a one-sided heat sink. The danger that the self-limiting effect of the heating element occurs prematurely and therefore the heating capacity of the PTC element is not optimally used is therefore particularly great in such a case.

Der Erfindung liegt die Aufgabe zugrunde, einen Kaltleiter-PTC-Heizkörper der eingangs genannten Art anzugeben, der zur Erwärmung einer rohrförmigen Wärmesenke in besonderer Weise geeignet ist.The invention has for its object to provide a PTC thermistor of the type mentioned, which is particularly suitable for heating a tubular heat sink.

Diese Aufgabe wird durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.This object is achieved by the characterizing features of claim 1. Advantageous embodiments of the invention are the subject of the dependent claims.

Durch die Erfindung wird ein PTC-Heizkörper geschaffen, bei welchem mit Hilfe der an dem Deckkörper angebrachten abgewinkelten Randstreifen die von dem Deckkörper aufgenommene Wärme in etwa dieselbe Richtung gelenkt wird, in die die dem Deckkörper abgewandte Seite des PTC-Heizkörper ihre Wärme abgibt. Es wird somit die beidseitig von dem PTC-Heizkörper abgegebene Wärme auf im wesentlichen eine einzige Seite abgeleitet, wo sie an eine Wärmesenke abgegeben werden kann, die in dem Kanal Aufnahme findet, der in dem Trägerprofilkörper ausgebildet ist. Dieser Kanal kann insbesondere halbkreisförmigen Querschnitt haben, so daß in ihm ein Rohr mit kreisförmigen Querschnitt Aufnahme finden kann.The invention provides a PTC heating element in which, with the aid of the angled edge strips attached to the covering element, the heat absorbed by the covering element is directed in approximately the same direction in which the side of the PTC heating element facing away from the covering element emits its heat. The heat emitted on both sides by the PTC heating element is thus dissipated to essentially one side, where it can be emitted to a heat sink which is accommodated in the channel which is formed in the carrier profile body. This channel can in particular have a semicircular cross section, so that a tube with a circular cross section can be accommodated in it.

Es ist wesentlich für die Erfindung, daß die Einzelteile des Heizkörpers in sehr einfacher Weise zusammengefügt werden können, ohne daß es irgendwelcher Biegevorgänge oder eines Vergießens bedarf, die einzelnen Bauteile brauchen nur in geeigneter Weise übereinandergelegt zu werden und werden dann durch wenigstens einen Klemmbügel zusammengespannt und aneinander gesichert.It is essential for the invention that the individual parts of the radiator can be joined together in a very simple manner, without the need for any bending processes or casting, the individual components only need to be superimposed in a suitable manner and are then clamped together by at least one clamping bracket and secured to each other.

Die Erfindung wird nachfolgend unter Bezugnahme auf in den Zeichnungen dargest ellte Ausführungsbeispiele näher erläutert. Es zeigt:

Fig. 1
einen Kaltleiter-PTC-Heizkörper gemäß einer ersten Ausführungsform der Erfindung;
Fig. 2
eine Explosionsdarstellung des Heizkörpers nach Fig. 1, und
Fig. 3
einen Trägerprofilkörper gemäß einer zweiten Ausführungsform der Erfindung.
The invention is explained in more detail below with reference to exemplary embodiments illustrated in the drawings. It shows:
Fig. 1
a PTC thermistor in accordance with a first embodiment of the invention;
Fig. 2
an exploded view of the radiator of FIG. 1, and
Fig. 3
a support profile body according to a second embodiment of the invention.

Gemäß den Fig. 1 und 2 besteht der PTC-Heizkörper aus einem Trägerprofilkörper 1, einem PTC-Heizkörper aus im vorliegenden Falle vier PTC-Widerstandselementen 2 (Fig. 2e), einer Positionsplatte 3, die die PTC-Widerstandselemente 2 in ihre Position sichert, und oberen und unteren Kontaktblechen 4 und 5 mit Anschlußleitern 6, einer Isolierfolie 7, einem Wärmeleitbügel 8 und einem Federklemmbügel 9.1 and 2, the PTC heater consists of a carrier profile body 1, a PTC heater from four PTC resistance elements 2 in the present case (FIG. 2e), a position plate 3 which secures the PTC resistance elements 2 in their position , and upper and lower contact plates 4 and 5 with connecting conductors 6, an insulating film 7, a heat-conducting bracket 8 and a spring clip bracket 9.

Der Trägerprofilkörper 1 besteht aus einem gut wärmeleitfähigen Material, beispielsweise aus Aluminium oder Kupfer, und weist keine Auflagefläche 10 zur Aufnahme des PTC-Heizelements auf. Unterhalb der Auflagefläche 10 ist ein Kanal 11 ausgebildet, der im vorliegenden Falle etwa halbkreisförmigen Querschnitt hat. Am unteren Ende der Wände, die den Kanal 11 begrenzen, erstrecken sich nach oben Wände 12, die an ihren oberen und unteren Enden seitlich vorstehende Ränder 13 und 14 aufweisen. Zwischen diesen Wänden 12 und den Wänden, die den Kanal 11 begrenzen, ist jeweils eine Rille 15 ausgebildet.The carrier profile body 1 consists of a highly thermally conductive material, for example aluminum or copper, and has no bearing surface 10 for receiving the PTC heating element. A channel 11 is formed below the support surface 10, which in the present case has an approximately semicircular cross section. At the lower end of the walls which delimit the channel 11, walls 12 extend upwards, which have laterally projecting edges 13 and 14 at their upper and lower ends. A groove 15 is formed between each of these walls 12 and the walls that delimit the channel 11.

Die Positionsplatte 3 weist vier Durchbrüche 16 auf, die zur Aufnahme der PTC-Widerstandselemente 2 bestimmt sind und entsprechend an deren Größen angepaßt sind. Die Positionsplatte 3 besteht aus einem isolierenden Material und weist seitlich an beiden Rändern Kerben 17 auf. Die Kontaktbleche 4 bzw. 5 weisen an ihren Längsrändern nach unten abgewinkelte Nasen 18 bzw. 19 und Ausschnitte 20 bzw. 21 auf, wobei die Nasen und die Ausschnitte an den Kontaktblechen in bezug aufeinander so ausgerichtet sind, daß nach dem sandwichartigen Zusammenfügen des aus den kontaktblechen, der positionsplatte und den PTC-Widerstandselementen bestehenden PTC-Heizelements und dem Umbiegen der Fahnen 18 und 19 die beiden Kontaktbleche einander nicht berühren. Dieser Aufbau des PTC-Heizelements ist aus der DE-0S 3D 42 420 bereits bekannt.The position plate 3 has four openings 16, which are intended for receiving the PTC resistance elements 2 and are correspondingly adapted to their sizes. The position plate 3 consists of an insulating material and has notches 17 on both sides of the edges. The Contact plates 4 and 5 have on their longitudinal edges downwardly angled lugs 18 and 19 and cutouts 20 and 21, the lugs and the cutouts on the contact plates being aligned with respect to one another such that after the sandwiching of the contact plates , the position plate and the PTC resistance elements existing PTC heating element and the bending of the flags 18 and 19 do not touch the two contact plates. This structure of the PTC heating element is already known from DE-0S 3D 42 420.

Das Heizelement ist von der isolierfolie 7 umwickelt (siehe Fig. 1) und liegt in diesem Zustand auf der Auflagefläche 10 auf. Die Isolierfolie 7 isoliert das Heizelement elektrisch gegenüber dem Trägerprofilkörper 1, stellt aber einen guten wärmeübergang sicher. Sie besteht daher aus einem gut wärmeleitfähigen Material. Von oben ist das so isolierte Heizelement von dem Wärmeleitbügel 8 abgedeckt, der aus einem gut wärmeleitfähigen Material besteht und eine Deckplatte 22 aufweist, an die sich seitlich abgewinkelte Randstreifen 23 anschließen, die in die Rillen 15 im Trägerprofilkörper 1 eingreifen und an den benachbarten Wänden desselben dicht anliegen. Der Wärmeleitbügel 8 wird von dem Federklemmbügel 9 festgehalten, der an den beiderseits abstehenden Rändern 13 an den Wänden 12 des Trägerprofilkörpers 1 verrastet ist, wie Fig. 1 anschaulich zeigt. Der Federklemmbügel 9 ist in der mitte vorzugsweise mit einer Ausbauchung 24 versehen, die elastisch auf den Wärmeleitbügel 8 drückt. Ggf. können mehrere solcher Federklemmbügel verwendet werden, wenn eine besonders hohe Druckkraft und eine damit verbundene verbesserung des Wärmeübergangs auf den Trägerprofilkörper 1 erwünscht ist.The heating element is wrapped by the insulating film 7 (see FIG. 1) and in this state lies on the support surface 10. The insulating film 7 electrically insulates the heating element from the carrier profile body 1, but ensures good heat transfer. It therefore consists of a highly thermally conductive material. From above, the heating element thus insulated is covered by the heat-conducting bracket 8, which consists of a highly heat-conductive material and has a cover plate 22, to which are connected laterally angled edge strips 23 which engage in the grooves 15 in the carrier profile body 1 and on the adjacent walls thereof fit tightly. The heat-conducting bracket 8 is held by the spring clip 9, which is locked on the edges 13 projecting on both sides on the walls 12 of the carrier profile body 1, as FIG. 1 clearly shows. The spring clip 9 is preferably provided in the middle with a bulge 24 which presses elastically on the heat-conducting bracket 8. Possibly. Several such spring clamps can be used if a particularly high compressive force and an associated improvement in the heat transfer to the carrier profile body 1 is desired.

Im Gebrauch wird die von dem Heizelement über die Kontaktbleche 4 und 5 und die Isolierfolie 7 abgegebene Wärme zum einen direkt von dem Trägerprofilkörper 1 aufgenommen und zum anderen von der Deckplatte 22 des Wärmeleitbügels 8 abgenommen, von der sie über die Randstreifen 23 in dem unteren Bereich des Trägerprofilkörpers 1 nahe dem Kanal 11 abgeleitet wird.In use, the heat given off by the heating element via the contact plates 4 and 5 and the insulating film 7 is absorbed, on the one hand, directly by the carrier profile body 1 and, on the other hand, is removed by the cover plate 22 of the heat-conducting bracket 8, from which it passes over the edge strips 23 in the lower region of the carrier profile body 1 is derived near the channel 11.

Der Trägerprofilkörper 1 kann mit Hilfe eines vergleichbaren Federklemmbügels (nicht dargestellt), der an den Rändern 14 verspannt ist, an einem Rohr (nicht dargestellt) festgespannt werden, um an dieses Wärme abzugeben. Es sei betont, da ß der Querschnitt des Kanals 11 nicht halbkreisförmig zu sein braucht, sondern auch jede andere, an den Umriß des zu beheizenden Körpers angepaßte Gestalt haben kann.The carrier profile body 1 can be clamped to a pipe (not shown) with the aid of a comparable spring clip (not shown), which is clamped at the edges 14, in order to give off heat thereon. It should be emphasized that the cross section of the channel 11 need not be semicircular, but can also have any other shape adapted to the outline of the body to be heated.

Fig. 3 zeigt eine modifizierte Ausführungsform eines Trägerprofilkörpers 1a, der zwei Auflageflächen 10ʹ und 10ʺ mit zugehörigen Wänden, Rillen usw. aufweist, die im Winkel zueinander angeordnet sind und den Kanal 11 zwischen sich einschließen. Auf diese Weise ist es möglich, an dem Trägerprofilkörper zwei PTC-Heizelemente anzubringen oder eine unterschiedliche Montage der PTC-Heizelement auszuführen.Fig. 3 shows a modified embodiment of a carrier profile body 1a, which has two contact surfaces 10ʹ and 10ʺ with associated walls, grooves, etc., which are arranged at an angle to one another and enclose the channel 11 between them. In this way it is possible to attach two PTC heating elements to the carrier profile body or to carry out a different mounting of the PTC heating element.

Es sei betont, daß auf die Verwendung einer Isolierfolie verzichtet werden kann, wenn der Trägerprofilkörper aus einem isolierenden Material, beispielsweise einem Keramikmaterial besteht. Alternative kann die Isolierung auch mittels Isolierplatten erfolgen, wie es an sich bereits aus dem Stand der Technik bekannt ist.It should be emphasized that the use of an insulating film can be dispensed with if the carrier profile body consists of an insulating material, for example a ceramic material. Alternatively, the insulation can also be carried out by means of insulating plates, as is already known per se from the prior art.

Für einem intensiven Wärmeübergang von der Oberseite des PTC-Heizelements in Richtung auf den Kanal 11 ist es wichtig, daß die Randstreifen 13 und die Rillen 15 in ihren Abmessungen so aufeinander abgestimmt sind, daß eine gute Passung erzielt wird, damit ausreichend große Wärmebrücken entstehen. Hierzu kann auch eine gewisse Elastizität des Materials des Trägerprofilkörpers beitragen, die ein geringfügiges Aufspreizen der Rillen 15 aufgrund entsprechender Passung von Randstreifen und Rillen gestattet.It is for an intense heat transfer from the top of the PTC heating element towards the channel 11 important that the edge strips 13 and the grooves 15 are matched in their dimensions so that a good fit is achieved, so that sufficiently large thermal bridges arise. A certain elasticity of the material of the carrier profile body can also contribute to this, which permits a slight spreading of the grooves 15 due to a corresponding fit of edge strips and grooves.

Es sei schließlich erwähnt, daß anstelle der seitlich vorstehenden Ränder 13 bzw. 14 an der Wand 12 auch Rillen ausgebildet sein können, in die jeweils ein oder mehrere passend gestaltete Federklemmbügel verrastbar sind.Finally, it should be mentioned that instead of the laterally projecting edges 13 and 14, grooves can also be formed on the wall 12, into each of which one or more suitably designed spring clamps can be locked.

Claims (8)

  1. PTC resistor heating body, consisting of an elongate support profile body composed of heat-conductive material with at least one support face and at least one PTC heating element, which rests flush on one side on said support face in a heat-conducting connexion and which consists of an upper and lower electrode plate and at least one PTC resistor element mounted in between, of a covering body with a face section resting flush on the other side of the PTC heating element, and of a clamping device for clamping together the support profile body and the cover body, characterised in that the support profile body (1) has, on the side facing away from the PTC heating element (2, 3, 4, 5), a channel (11) with a cross-section which is open on the side facing away from the PTC heating element, in that the support profile body (1) has a respective longitudinal groove (15) perpendicular to said longitudinal groove (15) on either side of the support face (10), the cover body (8) is provided on both sides of its face section (22) resting on the PTC heating element with edge strips (23) angled relative to said face section (22), the edge strips (23) being received in a tight fit by each of the grooves (15) in the support profile body (1), and in that the clamping device consists of at least one hasp spring clip (9) of approximately U-shaped cross-section, whose middle section presses on the cover body (8) and whose outer arms are braced against the support profile body (1).
  2. Heating body according to claim 1, characterised in that the middle section of the spring clip (9) is convex (24) relative to the cover body (8).
  3. Heating body according to claim 1 or 2, characterised in that the support profile body (1) has on each side a laterally projecting, longitudinal edge (13), to which the spring clip (9) is fastened.
  4. Heating body according to one of the preceding claims, characterised in that the support profile body (1) is provided on both sides in the region laterally next to the aperture of its channel (11) with a longitudinal groove or a laterally projecting edge (14) for anchoring a fixing clip.
  5. Heating body according to one of the preceding claims, characterised in that the support profile body (1a) has two support faces (10', 10'') which are arranged at an angle relative to one another approximately in the manner of a roof, so as to include the channel (11) between them.
  6. Heating body according to one of the preceding claims, characterised in that the support profile body (1) and the cover body (8) consist of metal, and the PTC heating element is electrically insulated therefrom by insulation (7) consisting of termally well conductive, electrically insulating material.
  7. Heating body according to claim 6, characterised in that the insulation is formed by a foil (7) wound round the PTC heating element (2, 3, 4, 5).
  8. Heating body according to one of the preceding claims, characterised in that the channel (11) has an approximately semicircular cross-section.
EP86113472A 1986-10-01 1986-10-01 Ptc-heating resistor Expired - Lifetime EP0262243B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP86113472A EP0262243B1 (en) 1986-10-01 1986-10-01 Ptc-heating resistor
DE8686113472T DE3677603D1 (en) 1986-10-01 1986-10-01 PTC PTC RADIATOR.
US07/103,055 US4814584A (en) 1986-10-01 1987-09-30 Profiled PCT heater for heating a tubular member
JP62249046A JPS63164193A (en) 1986-10-01 1987-10-01 Ptc heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP86113472A EP0262243B1 (en) 1986-10-01 1986-10-01 Ptc-heating resistor

Publications (2)

Publication Number Publication Date
EP0262243A1 EP0262243A1 (en) 1988-04-06
EP0262243B1 true EP0262243B1 (en) 1991-02-20

Family

ID=8195462

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86113472A Expired - Lifetime EP0262243B1 (en) 1986-10-01 1986-10-01 Ptc-heating resistor

Country Status (4)

Country Link
US (1) US4814584A (en)
EP (1) EP0262243B1 (en)
JP (1) JPS63164193A (en)
DE (1) DE3677603D1 (en)

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DE102018122436B4 (en) 2018-09-13 2024-08-22 Eichenauer Heizelemente Gmbh & Co. Kg Heater assembly and heater housing with such a heater assembly

Also Published As

Publication number Publication date
DE3677603D1 (en) 1991-03-28
US4814584A (en) 1989-03-21
EP0262243A1 (en) 1988-04-06
JPS63164193A (en) 1988-07-07

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