EP2393336B1 - Heat exchanger - Google Patents

Heat exchanger Download PDF

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Publication number
EP2393336B1
EP2393336B1 EP10290296.2A EP10290296A EP2393336B1 EP 2393336 B1 EP2393336 B1 EP 2393336B1 EP 10290296 A EP10290296 A EP 10290296A EP 2393336 B1 EP2393336 B1 EP 2393336B1
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EP
European Patent Office
Prior art keywords
housing
insulation
heat exchanger
ptc heating
heating element
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EP10290296.2A
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German (de)
French (fr)
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EP2393336A1 (en
EP2393336A8 (en
Inventor
Thierry Clauss
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Mahle Behr France Rouffach SAS
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Mahle Behr France Rouffach SAS
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Priority to EP10290296.2A priority Critical patent/EP2393336B1/en
Publication of EP2393336A1 publication Critical patent/EP2393336A1/en
Publication of EP2393336A8 publication Critical patent/EP2393336A8/en
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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
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/02—Heaters using heating elements having a positive temperature coefficient

Definitions

  • the invention relates to a heat exchanger according to the preamble of claim 1.
  • Consumption-optimized vehicles generate less and less waste heat, which is available for warming up the interior. Especially in the starting phase and at low outside temperatures it is necessary to heat up.
  • electric heaters with PTC heating elements are used, which make the conversion of electrical energy, for example from the electrical system of the vehicle into heat.
  • an electric heater which comprises a PTC heating element and an insulating housing surrounding the PTC heating element, wherein the housing comprises a housing shell element and a shell counter element, which abut each other with the interposition of a sealing strip applied to opposite end sides of the housing elements.
  • the sealing element seals the housing elements against each other in an externally acting on the heat-generating element and the tracks against the PTC heating element pushing pressure force and surrounds the PTC heating element sealing.
  • EP 1 768 459 A1 EP 1 768 458 B1 and EP 1 768 457 B1
  • HV-PTC heaters are described in which the electrical insulation is effected in that the contact plates are each covered by an insulating layer, and that the insulating layers are connected to an insulating or positioning housing.
  • the EP 2 190 256 A1 discloses a heat exchanger for a motor vehicle, which has a housing in which at least one PTC heating element is arranged, which in each case adjoins a contact plate on opposite sides, wherein the at least one PTC heating element and the adjacent contact plates on the opposite sides are glued together so as to form a preassembled structural unit (8), wherein an insulation is provided between an inner wall of the housing and each of the contact sheets, wherein the insulation is also part of the preassembled unit.
  • the object of the present invention to provide a designed as an electric heater heat exchanger, in which on the one hand a water and dustproof, but not electrically insulating housing is provided and in which on the other hand, the PTC heating elements and adjacent contact plates both in the housing are positioned as well as against the insulation, which has a structurally simple and thus cost-effective construction.
  • a heat exchanger in particular an electric heater for a motor vehicle, which has a housing in which at least one PTC heating element is arranged, which in each case adjoins a contact plate on opposite sides, wherein the at least one PTC heating element and the opposite sides adjacent contact sheets are glued together so as to form a preassembled unit, wherein between an inner wall of the housing and each of the contact plates insulation is provided, the insulation is also part of the preassembled unit, wherein all contact surfaces of PTC heating element, the two contact plates and the insulation are glued together, and wherein the insulation is U-shaped.
  • the housing is dustproof and waterproof, so that a long life of the heat exchanger can be guaranteed.
  • the housing is electrically conductive, in particular made of aluminum.
  • the housing consists of two half-shells, which are tightly connected to each other, in particular glued, welded or folded, are.
  • the housing is made as a closed tube, in particular of an extruded tube.
  • the insulation is made of polyimide, silicone, ceramic-filled silicone or ceramic, in particular alumina, aluminum nitride or boron nitride.
  • the insulation is U-shaped.
  • the U-shaped design of the insulation makes it possible to position the preassembled unit and at the same time to space it from the electrically non-insulating housing.
  • a position profile is attached to the insulation.
  • the position profile is preferably made of an electrically insulating material, in particular of polyamide or silicone.
  • the position profile is fixed to the insulation by means of an adhesive.
  • the position profile is formed self-adhesive or self-adhesive.
  • the position profile can also be fixed to the insulation by means of latching, sliding, gluing or extrusion coating.
  • the contact plates are each connected to a position profile, which positions the preassembled unit both in the housing and against the insulation.
  • the at least one PTC heating element is not held by the position profile, because the at least one PTC heating element and the contact plates bonded thereto form the preassembled structural unit.
  • the preassembled unit can be positioned both in the housing and against the insulation.
  • the position profile can be fixed according to yet another preferred embodiment by means of snapping, pushing, gluing or extrusion coating on the contact plate.
  • Fig.1A and Fig. 1B each show a sectional view through a housing 1 of a heat exchanger 2 according to a non-inventive embodiment, wherein the in Fig. 1A Housing 1 shown in two parts of two half-shells 3, 3 'is constructed, which are connected together tightly by gluing, and in Fig. 1B shown housing 1 is made in one piece from a closed, extruded tube.
  • the housing 1 is made of aluminum in both cases.
  • the structure and the arrangement of the individual elements of the heat exchanger 2 in the interior of the respective housing 1 is in the embodiments of Fig. 1A and Fig. 1B however identical and will only be based on the Fig. 1A explained.
  • the housing 4 there is a plurality of PTC heating elements 5 in the housing 4, which is sealed in a watertight and dust-tight manner, in its interior space 4.
  • a contact plate 7, 7' is arranged in each case.
  • the PTC heating elements 5 are glued to the contact plates 7, 7 'and thus form the preassembled unit 8.
  • an insulation 10, 10 ' is arranged between an inner wall 9 of the housing 1 and each contact plate 7, 7'.
  • the insulation 10, 10 ' is in the embodiment of polyimide.
  • the insulation may also be made of silicone, ceramic-filled silicone, or ceramic such as alumina, aluminum nitride, boron nitride.
  • the insulation 10 and the insulation 10 ' are spaced apart in the interior 4 of the housing.
  • To the insulation 10, 10 ' is in each case a position profile 11, 11' attached or glued thereto.
  • the insulation 10, 10 ' forms a U-shaped element with a respective position profile 11, 11'.
  • the assembly 8 consisting of the plurality of PTC heating elements 5 and the contact plates glued on both sides 7, 7 'is positioned by the described arrangement in a simple manner both in the housing 1 and against the insulation 10, 10'.
  • Fig. 2A, 2B each show a sectional view through a housing 1 of a heat exchanger according to an embodiment of the invention.
  • the housing which as already in connection with Fig. 1A and Fig. 1B has been explained in Fig. 2A two-piece and in Fig. 2B is formed in one piece.
  • the arrangement of the elements in the interior 4 of the housing 1 shown here differs from the in Fig. 1A and Fig. 1B illustrated embodiment in that instead of the provision of a position profile 11, 11 ', the insulation 10, 10' itself each U-shaped and thus ensures the positioning of the preassembled unit 8 in the housing 1 and against the insulation 10, 10 '.
  • FIGS. 3A and 3B each show a sectional view through a housing 1 of a heat exchanger 2 according to yet another non-inventive Embodiment.
  • the Fig. 3A, 3B differ with respect to their housing 1 in the manner already described above.
  • the FIGS. 3A and 3B illustrated embodiment differs from the embodiments described so far in that the position profiles 11, 11 'here are not attached to the respective insulation 10, 10' and the insulation 10, 10 'is itself formed as a position profile sandem the position profiles eleventh , 11 'here are attached to the both sides of the PTC heating elements 5 adhered contact plates 7, 7', wherein the contact plates 7, 7 'of in FIGS.
  • Fig. 4A, 4B each show a sectional view through a housing 1 of a heat exchanger 2 according to another embodiment not according to the invention.
  • the Fig. 4A, 4B differ with respect to their housing 1 in the manner already described above.
  • the position profiles 11, 11 ' are attached to the contact plates 7, 7', in which case the position profiles 11, 11 'have been glued to the respective contact plates 7, 7'.
  • Fig. 5A, 5B each show a sectional view through a housing 1 of a heat exchanger 2 according to another embodiment not according to the invention.
  • the Fig. 5A, 5B differ with respect to their housing 1 in the manner already described above.
  • the insulation 10, 10 'at a first end portion 14, 14' respective first recesses 15, 15 'and at a second end portion 16, 16 'respective second recesses 17, 17' in which the position profiles 11, 11 'are also included.
  • Fig. 6A, 6B each show a sectional view through a housing 1 of a heat exchanger 2 according to another embodiment not according to the invention.
  • the PTC heating element 5, the two contact sheets 7, 7 'and the insulation 10, 10' form a preassembled unit, the manufacturing process ensuring the relative positioning of these components to one another.
  • all contact surfaces of PTC heating element, the two contact plates 7, 7 'and the insulation 10, 10' are glued together.
  • the preassembled unit consisting of the PTC heating element 5, the two contact plates 7 and 7 'and the insulation 10, 10' is formed by the two end portions of the insulation in the housing (formed as a closed tube ( Fig. 6B ) or as two half-shells ( Fig. 6A )).
  • PTC heating elements can be positioned in a watertight and dust-tight housing with the heat exchanger 1 designed in this way in a structurally simple and thus cost-effective manner.

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  • Air-Conditioning For Vehicles (AREA)
  • Resistance Heating (AREA)

Description

Die Erfindung betrifft einen Wärmeübertrager gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a heat exchanger according to the preamble of claim 1.

Verbrauchsoptimierte Fahrzeuge erzeugen immer weniger Abwärme, die für die Aufwärmung des Innenraums zur Verfügung steht. Vor allem in der Startphase und bei geringen Außentemperaturen ist es notwendig, zuzuheizen. Hierzu werden im Stand der Technik unter anderem elektrische Zuheizer mit PTC-Heizelementen eingesetzt, welche die Umwandlung von elektrischer Energie beispielsweise aus dem Bordnetz des Fahrzeugs in Wärme vornehmen.Consumption-optimized vehicles generate less and less waste heat, which is available for warming up the interior. Especially in the starting phase and at low outside temperatures it is necessary to heat up. For this purpose, in the prior art, inter alia, electric heaters with PTC heating elements are used, which make the conversion of electrical energy, for example from the electrical system of the vehicle into heat.

An diese elektrischen PTC-Heizeinrichtungen werden spezielle Anforderungen gestellt. So sollte eine elektrische Isolation von wärmeabführenden Elementen der PTC-Heizeinrichtung bis zu 5000 VAC gewährleistet sein, während eine hohe Wärmeleitfähigkeit der elektrisch isolierenden Elemente, die größer als 5 W/m/K ist, vorhanden sein sollte. Auch sollte eine hohe Temperaturbeständigkeit der elektrisch isolierenden Elemente von mindestens 200 °C gegeben sein und das Heiznetz der PTC-Heizeinrichtung sollte bezüglich der Staub- und Wasserdichtigkeit der Schutzklasse IP67 entsprechen.Special requirements are made of these electric PTC heaters. Thus, an electrical insulation of heat-dissipating elements of the PTC heater should be ensured up to 5000 VAC, while a high thermal conductivity of the electrically insulating elements, which is greater than 5 W / m / K, should be present. Also, a high temperature resistance of the electrically insulating elements of at least 200 ° C should be given and the heating network of the PTC heater should comply with the dust and water resistance of the protection class IP67.

Im Hinblick auf die Dichtigkeit des Gehäuses offenbart EP 1 916 873 B1 einen elektrischen Zuheizer, welcher ein PTC-Heizelement und ein das PTC-Heizelement umgebendes isolierendes Gehäuse umfasst, wobei das Gehäuse ein Gehäuseschalenelement und ein Schalengegenelement umfasst, die unter Zwischenlage eines an gegenüberliegenden Stirnseiten der Gehäuseelemente anliegende Dichtstreifen aneinander anliegen. Das Dichtelement dichtet die Gehäuseelemente bei einer von außen auf das wärmeerzeugende Element wirkenden und die Leiterbahnen gegen das eine PTC-Heizelement drückenden Druckkraft gegeneinander ab und umschließt das PTC-Heizelement dichtend.With regard to the tightness of the housing disclosed EP 1 916 873 B1 an electric heater, which comprises a PTC heating element and an insulating housing surrounding the PTC heating element, wherein the housing comprises a housing shell element and a shell counter element, which abut each other with the interposition of a sealing strip applied to opposite end sides of the housing elements. The sealing element seals the housing elements against each other in an externally acting on the heat-generating element and the tracks against the PTC heating element pushing pressure force and surrounds the PTC heating element sealing.

Darüber hinaus ist es bezüglich der elektrischen Isolation aus EP 2 109 345 A1 bekannt, die Außenflächen der elektrischen Leiterbahnen jeweils mit einer Isolierschicht zu überdecken, die fest mit einem das PTC-Heizelement umgebenden, isolierenden Gehäuse verbunden ist.In addition, it is in terms of electrical insulation EP 2 109 345 A1 known to cover each of the outer surfaces of the electrical conductor tracks with an insulating layer, which is fixedly connected to a surrounding the PTC heating element, insulating housing.

In EP 1 768 459 A1 , EP 1 768 458 B1 und EP 1 768 457 B1 werden jeweils HV-PTC-Heizer beschrieben, in denen die elektrische Isolation dadurch erfolgt, dass die Kontaktbleche jeweils von einer Isolierschicht überdeckt sind, und dass die Isolierschichten mit einem Isolier- bzw. Positioniergehäuse verbunden sind.In EP 1 768 459 A1 . EP 1 768 458 B1 and EP 1 768 457 B1 In each case HV-PTC heaters are described in which the electrical insulation is effected in that the contact plates are each covered by an insulating layer, and that the insulating layers are connected to an insulating or positioning housing.

Die EP 2 190 256 A1 offenbart einen Wärmeübertrager für ein Kraftfahrzeug, welcher ein Gehäuse aufweist, in welchem zumindest ein PTC-Heizelement angeordnet ist, welches auf gegenüberliegenden Seiten jeweils an ein Kontaktblech angrenzt, wobei das zumindest eine PTC-Heizelement und die auf den gegenüberliegenden Seiten angrenzenden Kontaktbleche miteinander verklebt sind, um so eine vormontierte Baueinheit (8) zu bilden, wobei zwischen einer Innenwand des Gehäuses und jedem der Kontaktbleche eine Isolierung vorgesehen ist, wobei die Isolierung ebenso Teil der vormontierten Baueinheit ist.The EP 2 190 256 A1 discloses a heat exchanger for a motor vehicle, which has a housing in which at least one PTC heating element is arranged, which in each case adjoins a contact plate on opposite sides, wherein the at least one PTC heating element and the adjacent contact plates on the opposite sides are glued together so as to form a preassembled structural unit (8), wherein an insulation is provided between an inner wall of the housing and each of the contact sheets, wherein the insulation is also part of the preassembled unit.

Die im Stand der Technik bekannten Konfigurationen von PTC-Heizeinrichtungen sind jedoch im Hinblick auf elektrische Isolation und Staub- bzw. Wasserdichtigkeit konstruktiv aufwändig und somit teuer. Darüber hinaus besteht bei den im Stand der Technik bekannten Konfigurationen auch ein Problem im Hinblick auf die Positionierung der PTC-Heizelemente sowohl im Gehäuse als auch gegen die Isolierungen.However, the known in the prior art configurations of PTC heaters are structurally complex in terms of electrical insulation and dust or water resistance and thus expensive. Moreover, the configurations known in the art exist also a problem with regard to the positioning of the PTC heating elements both in the housing and against the insulation.

Daher ist es die Aufgabe der vorliegenden Erfindung, einen als elektrischen Zuheizer ausgebildeten Wärmeübertrager zu schaffen, bei welchem einerseits ein wasser- und staubdichtes, jedoch elektrisch nicht isolierendes Gehäuse vorgesehen wird und in welchem andererseits die PTC-Heizelemente und daran anliegende Kontaktbleche sowohl in dem Gehäuse als auch gegen die Isolierung positioniert sind, welcher einen konstruktiv einfachen und somit kostengünstigen Aufbau aufweiset.Therefore, it is the object of the present invention to provide a designed as an electric heater heat exchanger, in which on the one hand a water and dustproof, but not electrically insulating housing is provided and in which on the other hand, the PTC heating elements and adjacent contact plates both in the housing are positioned as well as against the insulation, which has a structurally simple and thus cost-effective construction.

Die Aufgabe der vorliegenden Erfindung wird durch einen Wärmeübertrager mit den Merkmalen gemäß Anspruch 1 gelöst. Vorteilhafte Weiterbildungen der vorliegenden Erfindung sind in den Unteransprüchen definiert.The object of the present invention is achieved by a heat exchanger with the features of claim 1. Advantageous developments of the present invention are defined in the subclaims.

Erfindungsgemäß wird ein Wärmeübertrager, insbesondere ein elektrischer Zuheizer für ein Kraftfahrzeug, vorgesehen, welcher ein Gehäuse aufweist, in welchem zumindest ein PTC-Heizelement angeordnet ist, welches auf gegenüberliegenden Seiten jeweils an ein Kontaktblech angrenzt, wobei das zumindest eine PTC-Heizelement und die auf den gegenüberliegenden Seiten angrenzenden Kontaktbleche miteinander verklebt sind, um so eine vormontierte Baueinheit zu bilden, wobei zwischen einer Innenwand des Gehäuses und jedem der Kontaktbleche eine Isolierung vorgesehen ist, wobei die Isolierung ebenso Teil der vormontierten Baueinheit ist, wobei sämtliche Berührungsflächen von PTC-Heizelement, den beiden Kontaktblechen und der Isolierung miteinander verklebt sind, und wobei die Isolierung U-förmig ausgebildet ist.According to the invention, a heat exchanger, in particular an electric heater for a motor vehicle, is provided which has a housing in which at least one PTC heating element is arranged, which in each case adjoins a contact plate on opposite sides, wherein the at least one PTC heating element and the the opposite sides adjacent contact sheets are glued together so as to form a preassembled unit, wherein between an inner wall of the housing and each of the contact plates insulation is provided, the insulation is also part of the preassembled unit, wherein all contact surfaces of PTC heating element, the two contact plates and the insulation are glued together, and wherein the insulation is U-shaped.

Durch Vorsehen einer vormontierten Baueinheit bestehend aus zumindest einem PTC-Heizelement und den beidseitig daran angrenzenden Kontaktblechen wird ein einerseits einfacher Aufbau erzielt, anderseits lässt sich die vormontierte Baueinheit sowohl im Gehäuse als auch gegen die Isolierungen auf einfache Art und Weise positionieren.By providing a preassembled unit consisting of at least one PTC heating element and the contact plates adjacent thereto on both sides, on the one hand a simple structure is achieved, on the other hand, the Position the pre-assembled unit in the housing as well as against the insulation in a simple way.

Vorzugsweise ist das Gehäuse staub- und wasserdicht, so dass eine lange Lebensdauer des Wärmeübertragers gewährleistet werden kann.Preferably, the housing is dustproof and waterproof, so that a long life of the heat exchanger can be guaranteed.

Gemäß einer bevorzugten Ausführungsform ist das Gehäuse elektrisch leitend, insbesondere aus Aluminium.According to a preferred embodiment, the housing is electrically conductive, in particular made of aluminum.

Gemäß noch einer bevorzugten Ausführungsform besteht das Gehäuse aus zwei Halbschalen, die miteinander dicht verbunden, insbesondere verklebt, verschweißt oder verfalzt, sind.According to yet a preferred embodiment, the housing consists of two half-shells, which are tightly connected to each other, in particular glued, welded or folded, are.

Gemäß noch einer weiteren bevorzugten Ausführungsform ist das Gehäuse als geschlossenes Rohr, insbesondere aus einem extrudierten Rohr, hergestellt.According to yet another preferred embodiment, the housing is made as a closed tube, in particular of an extruded tube.

Darüber hinaus ist gemäß noch einer weiteren bevorzugten Ausführungsform die Isolierung aus Polyimid, Silikon, mit Keramik gefülltem Silikon oder Keramik, insbesondere Aluminiumoxyd, Aluminiumnitrid oder Bornitrid, hergestellt.Moreover, according to yet another preferred embodiment, the insulation is made of polyimide, silicone, ceramic-filled silicone or ceramic, in particular alumina, aluminum nitride or boron nitride.

Erfindungsgemäß ist die Isolierung U-förmig ausgebildet. Die U-förmige Ausbildung der Isolierung ermöglicht es, die vormontierte Baueinheit zu positionieren und sie gleichzeitig von dem elektrisch nicht isolierenden Gehäuse zu beabstanden.According to the invention, the insulation is U-shaped. The U-shaped design of the insulation makes it possible to position the preassembled unit and at the same time to space it from the electrically non-insulating housing.

Gemäß einer weiteren bevorzugten Ausführungsform ist an der Isolierung ein Positionsprofil angebracht.According to a further preferred embodiment, a position profile is attached to the insulation.

Vorzugsweise ist das Positionsprofil aus einem elektrisch isolierenden Material, insbesondere aus Polyamid oder Silikon, hergestellt.The position profile is preferably made of an electrically insulating material, in particular of polyamide or silicone.

Es ist darüber hinaus auch bevorzugt, wenn das Positionsprofil an der Isolierung mittels eines Klebers fixiert ist.Moreover, it is also preferred if the position profile is fixed to the insulation by means of an adhesive.

Gemäß noch einer weiteren bevorzugten Ausführungsform ist das Positionsprofil selbsthaftend oder selbstklebend ausgebildet.According to yet another preferred embodiment, the position profile is formed self-adhesive or self-adhesive.

Das Positionsprofil kann an der Isolierung auch mittels Aufrasten, Aufschieben, Verkleben oder Umspritzen fixiert sein.The position profile can also be fixed to the insulation by means of latching, sliding, gluing or extrusion coating.

Vorzugsweise sind die Kontaktbleche jeweils mit einem Positionsprofil verbunden, welches die vormontierte Baueinheit sowohl im Gehäuse als auch gegen die Isolierung positioniert. In dieser Ausführungsform wird das zumindest eine PTC-Heizelement jedoch nicht von dem Positionsprofil gehalten, denn das zumindest eine PTC-Heizelement und die darauf verklebten Kontaktbleche bilden die vormontierte Baueinheit. Auch durch dieses Positionsprofil kann die vormontierte Baueinheit sowohl im Gehäuse als auch gegen die Isolierung positioniert werden.Preferably, the contact plates are each connected to a position profile, which positions the preassembled unit both in the housing and against the insulation. In this embodiment, however, the at least one PTC heating element is not held by the position profile, because the at least one PTC heating element and the contact plates bonded thereto form the preassembled structural unit. Also by this position profile, the preassembled unit can be positioned both in the housing and against the insulation.

Das Positionsprofil kann gemäß noch einer weiteren bevorzugten Ausführungsform mittels Aufrasten, Aufschieben, Verkleben oder Umspritzen an dem Kontaktblech befestigt sein.The position profile can be fixed according to yet another preferred embodiment by means of snapping, pushing, gluing or extrusion coating on the contact plate.

Im Folgenden wird die Erfindung anhand eines Ausführungsbeispiels unter Bezugnahme auf die Zeichnung detailliert erläutert. In der Zeichnung zeigen:

Fig.1A, 1B
jeweils eine Schnittansicht durch ein Gehäuse eines Wärmeübertragers gemäß einer nicht erfindungsgemäßen Ausführungsform;
Fig. 2A, 2B
jeweils eine Schnittansicht durch ein Gehäuse eines Wärmeübertragers gemäß einer erfindungsgemäßen Ausführungsform;
Fig. 3A, 3B
jeweils eine Schnittansicht durch ein Gehäuse eines Wärmeübertragers gemäß einer weiteren nicht erfindungsgemäßen Ausführungsform;
Fig. 4A, 4B
jeweils eine Schnittansicht durch ein Gehäuse eines Wärmeübertragers gemäß einer weiteren nicht erfindungsgemäßen Ausführungsform;
Fig. 5A, 5B
jeweils eine Schnittansicht durch ein Gehäuse eines Wärmeübertragers gemäß einer weiteren nicht erfindungsgemäßen Ausführungsform;
Fig. 6A, 6B
jeweils eine Schnittansicht durch ein Gehäuse eines Wärmeübertragers gemäß einer weiteren nicht erfindungsgemäßen Ausführungsform.
In the following the invention will be explained in detail by means of an embodiment with reference to the drawing. In the drawing show:
Fig.1A, 1B
each a sectional view through a housing of a heat exchanger according to a non-inventive embodiment;
Fig. 2A, 2B
each a sectional view through a housing of a heat exchanger according to an embodiment of the invention;
Fig. 3A, 3B
in each case a sectional view through a housing of a heat exchanger according to a further non-inventive embodiment;
Fig. 4A, 4B
in each case a sectional view through a housing of a heat exchanger according to a further non-inventive embodiment;
Fig. 5A, 5B
in each case a sectional view through a housing of a heat exchanger according to a further non-inventive embodiment;
Fig. 6A, 6B
in each case a sectional view through a housing of a heat exchanger according to a further non-inventive embodiment.

Fig.1A und Fig. 1B zeigen jeweils eine Schnittansicht durch ein Gehäuse 1 eines Wärmeübertragers 2 gemäß einer nicht erfindungsgemäßen Ausführungsform, wobei das in Fig. 1A gezeigte Gehäuse 1 zweiteilig aus zwei Halbschalen 3, 3' aufgebaut ist, die miteinander dicht durch Verkleben verbunden sind, und das in Fig. 1B gezeigte Gehäuse 1 einteilig aus einem geschlossenen, extrudierten Rohr hergestellt ist. Das Gehäuse 1 besteht in beiden Fällen aus Aluminium. Der Aufbau und die Anordnung der einzelnen Elemente des Wärmeübertragers 2 im Inneren der jeweiligen Gehäuse 1 ist in den Ausführungsformen der Fig. 1A und Fig. 1B jedoch identisch und wird lediglich anhand der Fig. 1A erläutert. Dabei befindet sich in dem wasserdicht und staubdicht verschlossenen Gehäuse 1 in dessen Innenraum 4 eine Vielzahl von PTC-Heizelementen 5. Auf den gegenüberliegenden Längseiten 6, 6' der PTC-Heizelemente 5 ist jeweils ein Kontaktblech 7, 7' angeordnet. Die PTC-Heizelemente 5 sind mit den Kontaktblechen 7, 7' verklebt und bilden so die vormontierte Baueinheit 8. Zwischen einer Innenwand 9 des Gehäuses 1 und jedem Kontaktblech 7, 7' ist eine Isolierung 10, 10' angeordnet. Die Isolierung 10, 10' besteht in der Ausführungsform aus Polyimid. Alternativ kann die Isolierung jedoch auch aus Silikon, mit Keramik gefülltem Silikon oder aus Keramik, wie z. b. aus Aluminiumoxid, Aluminiumnitrid, Bornitrid, hergestellt sein. Die Isolierung 10 und die Isolierung 10' sind in dem Innenraum 4 des Gehäuses beabstandet voneinander angeordnet. An die Isolierung 10, 10' ist jeweils ein Positionsprofil 11, 11' angebracht bzw. daran geklebt. Im Schnitt betrachtet bildet die Isolierung 10, 10' mit einem jeweiligen Positionsprofil 11, 11' ein U-förmiges Element. Die Baueinheit 8 bestehend aus der Vielzahl von PTC-Heizelementen 5 und den beidseitig angeklebten Kontaktblechen 7, 7' ist durch die beschriebene Anordnung auf einfache Weise sowohl in dem Gehäuse 1 als auch gegen die Isolierung 10, 10' positioniert. Fig.1A and Fig. 1B each show a sectional view through a housing 1 of a heat exchanger 2 according to a non-inventive embodiment, wherein the in Fig. 1A Housing 1 shown in two parts of two half-shells 3, 3 'is constructed, which are connected together tightly by gluing, and in Fig. 1B shown housing 1 is made in one piece from a closed, extruded tube. The housing 1 is made of aluminum in both cases. The structure and the arrangement of the individual elements of the heat exchanger 2 in the interior of the respective housing 1 is in the embodiments of Fig. 1A and Fig. 1B however identical and will only be based on the Fig. 1A explained. In this case, there is a plurality of PTC heating elements 5 in the housing 4, which is sealed in a watertight and dust-tight manner, in its interior space 4. On the opposite longitudinal sides 6, 6 'of the PTC heating elements 5, a contact plate 7, 7' is arranged in each case. The PTC heating elements 5 are glued to the contact plates 7, 7 'and thus form the preassembled unit 8. Between an inner wall 9 of the housing 1 and each contact plate 7, 7', an insulation 10, 10 'is arranged. The insulation 10, 10 'is in the embodiment of polyimide. Alternatively, however, the insulation may also be made of silicone, ceramic-filled silicone, or ceramic such as alumina, aluminum nitride, boron nitride. The insulation 10 and the insulation 10 'are spaced apart in the interior 4 of the housing. To the insulation 10, 10 'is in each case a position profile 11, 11' attached or glued thereto. When viewed in section, the insulation 10, 10 'forms a U-shaped element with a respective position profile 11, 11'. The assembly 8 consisting of the plurality of PTC heating elements 5 and the contact plates glued on both sides 7, 7 'is positioned by the described arrangement in a simple manner both in the housing 1 and against the insulation 10, 10'.

Fig. 2A, 2B zeigen jeweils eine Schnittansicht durch ein Gehäuse 1 eines Wärmeübertragers gemäß einer erfindungsgemäßen Ausführungsform. Wiederum ist der einzige Unterschied zwischen der in Fig. 2A und Fig. 2B dargestellten Ausführungsform das Gehäuse, welches wie bereits in Zusammenhang mit Fig. 1A und Fig. 1B erläutert worden ist, in Fig. 2A zweiteilig und in Fig. 2B einteilig ausgebildet ist. Die hier dargestellte Anordnung der Elemente im Innenraum 4 des Gehäuses 1 unterscheidet sich von der in Fig. 1A und Fig. 1B dargestellten Ausführungsform dadurch, dass anstelle des Vorsehens eines Positionsprofils 11, 11' die Isolierung 10, 10' selbst jeweils U-förmig ausgebildet ist und somit die Positionierung der vormontierten Baueinheit 8 in dem Gehäuse 1 und gegen die Isolierung 10, 10' gewährleistet. Fig. 2A, 2B each show a sectional view through a housing 1 of a heat exchanger according to an embodiment of the invention. Again, the only difference between the in Fig. 2A and Fig. 2B illustrated embodiment, the housing, which as already in connection with Fig. 1A and Fig. 1B has been explained in Fig. 2A two-piece and in Fig. 2B is formed in one piece. The arrangement of the elements in the interior 4 of the housing 1 shown here differs from the in Fig. 1A and Fig. 1B illustrated embodiment in that instead of the provision of a position profile 11, 11 ', the insulation 10, 10' itself each U-shaped and thus ensures the positioning of the preassembled unit 8 in the housing 1 and against the insulation 10, 10 '.

Fig. 3A, 3B zeigen jeweils eine Schnittansicht durch ein Gehäuse 1 eines Wärmeübertragers 2 gemäß noch einer weiteren nicht erfindungsgemäßen Ausführungsform. Die Fig. 3A, 3B unterscheiden sich bezüglich ihres Gehäuses 1 auf die oben bereits beschriebene Art und Weise. Die in Fig. 3A und 3B dargestellte Ausführungsform unterscheidet sich darüber hinaus von den bisher beschriebenen Ausführungsformen dadurch, dass die Positionsprofile 11, 11' hier nicht an der jeweiligen Isolierung 10, 10' angebracht sind bzw. die Isolierung 10, 10' selbst als Positionsprofil ausgebildet ist, sandem die Positionsprofile 11, 11' hier an den beidseitig an den PTC-Heizelementen 5 angeklebten Kontaktblechen 7, 7' angebracht sind, wobei die Kontaktbleche 7, 7' der in Fig. 3A und 3B dargestellten Ausführungsform auf deren jeweiligen ersten Endabschnitt 12, 12' und zweiten Endabschnitt 13, 13' mit einem jeweiligen Positionsprofil 11, 11' durch Umspritzen des ersten Endabschnitts 12, 12' und des zweiten Endabschnitts 13, 13' bzw. Aufrasten, Aufschieben oder Verkleben an den ersten Endabschnitt 12, 12' und den zweiten Endabschnitt 13, 13' versehen sind. Fig. 3A, 3B each show a sectional view through a housing 1 of a heat exchanger 2 according to yet another non-inventive Embodiment. The Fig. 3A, 3B differ with respect to their housing 1 in the manner already described above. In the FIGS. 3A and 3B illustrated embodiment differs from the embodiments described so far in that the position profiles 11, 11 'here are not attached to the respective insulation 10, 10' and the insulation 10, 10 'is itself formed as a position profile sandem the position profiles eleventh , 11 'here are attached to the both sides of the PTC heating elements 5 adhered contact plates 7, 7', wherein the contact plates 7, 7 'of in FIGS. 3A and 3B on its respective first end portion 12, 12 'and second end portion 13, 13' with a respective position profile 11, 11 'by encapsulation of the first end portion 12, 12' and the second end portion 13, 13 'or snapping, sliding or gluing to the first end portion 12, 12 'and the second end portion 13, 13' are provided.

Fig. 4A, 4B zeigen jeweils eine Schnittansicht durch ein Gehäuse 1 eines Wärmeübertragers 2 gemäß einer weiteren nicht erfindungsgemäßen Ausführungsform. Die Fig. 4A, 4B unterscheiden sich bezüglich ihres Gehäuses 1 auf die oben bereits beschriebene Art und Weise. Auch in dieser Ausführungsform sind die Positionsprofile 11, 11' an den Kontaktblechen 7, 7' angebracht, wobei hierbei die Positionsprofile 11, 11' mit den jeweiligen Kontaktblechen 7, 7' verklebt wurden. Fig. 4A, 4B each show a sectional view through a housing 1 of a heat exchanger 2 according to another embodiment not according to the invention. The Fig. 4A, 4B differ with respect to their housing 1 in the manner already described above. In this embodiment as well, the position profiles 11, 11 'are attached to the contact plates 7, 7', in which case the position profiles 11, 11 'have been glued to the respective contact plates 7, 7'.

Fig. 5A, 5B zeigen jeweils eine Schnittansicht durch ein Gehäuse 1 eines Wärmeübertragers 2 gemäß einer weiteren nicht erfindungsgemäßen Ausführungsform. Die Fig. 5A, 5B unterscheiden sich bezüglich ihres Gehäuses 1 auf die oben bereits beschriebene Art und Weise. Die Positionsprofile 11, 11' sind wie in den Ausführungsformen 3A, 3B auf die jeweiligen Kontaktbleche 7, 7' aufgerastet, aufgeschoben, umgespritzt oder verklebt. Darüber hinaus ist erkennbar, dass die Isolierung 10, 10' an einem ersten Endabschnitt 14, 14' jeweilige erste Ausnehmungen 15, 15' und an einem zweiten Endabschnitt 16, 16' jeweilige zweite Ausnehmungen 17, 17' aufweist, in denen die Positionsprofile 11, 11' ebenfalls aufgenommen sind. Fig. 5A, 5B each show a sectional view through a housing 1 of a heat exchanger 2 according to another embodiment not according to the invention. The Fig. 5A, 5B differ with respect to their housing 1 in the manner already described above. The position profiles 11, 11 'are, as in the embodiments 3A, 3B, latched onto the respective contact plates 7, 7', slid, encapsulated or adhesively bonded. In addition, it can be seen that the insulation 10, 10 'at a first end portion 14, 14' respective first recesses 15, 15 'and at a second end portion 16, 16 'respective second recesses 17, 17', in which the position profiles 11, 11 'are also included.

Fig. 6A, 6B zeigen jeweils eine Schnittansicht durch ein Gehäuse 1 eines Wärmeübertragers 2 gemäß einer weiteren nicht erfindungsgemäßen Ausführungsform. In dieser Ausführungsform bilden das PTC-Heizelement 5, die beiden Kontaktbleche 7, 7' und die Isolierung 10, 10' eine vormontierte Baueinheit, wobei der Herstellungsprozess die relative Positionierung dieser Bauteile zueinander gewährleistet. Insbesondere sind sämtliche Berührungsflächen von PTC-Heizelement, den beiden Kontaktblechen 7, 7' und der Isolierung 10, 10' miteinander verklebt. Die vormontierte Baueinheit bestehend aus dem PTC-Heizelement 5, den beiden Kontaktblechen 7 und 7' und der Isolierung 10, 10' wird von den beiden Endabschnitten der Isolierung im Gehäuse (gebildet als geschlossenes Rohr (Fig. 6B) oder als zwei miteinander dicht verbundene Halbschalen (Fig. 6A)) positioniert. Fig. 6A, 6B each show a sectional view through a housing 1 of a heat exchanger 2 according to another embodiment not according to the invention. In this embodiment, the PTC heating element 5, the two contact sheets 7, 7 'and the insulation 10, 10' form a preassembled unit, the manufacturing process ensuring the relative positioning of these components to one another. In particular, all contact surfaces of PTC heating element, the two contact plates 7, 7 'and the insulation 10, 10' are glued together. The preassembled unit consisting of the PTC heating element 5, the two contact plates 7 and 7 'and the insulation 10, 10' is formed by the two end portions of the insulation in the housing (formed as a closed tube ( Fig. 6B ) or as two half-shells ( Fig. 6A )).

Insgesamt betrachtet können mit dem so ausgestalteten Wärmeübertrager 1 auf konstruktiv einfache und somit kostengünstige Art und Weise PTC-Heizelemente in einem wasser- und staubdichten Gehäuse positioniert werden. Overall, PTC heating elements can be positioned in a watertight and dust-tight housing with the heat exchanger 1 designed in this way in a structurally simple and thus cost-effective manner.

Claims (6)

  1. A heat exchanger (2), in particular an electric auxiliary heater for a motor vehicle, having a housing (1) in which at least one PTC heating element (5) is arranged which, on opposite sides, is respectively adjacent to a contact sheet (7, 7'), wherein the at least one PTC heating element (5) and the contact sheets (7, 7') being adjacent on the opposite sides are glued together so as to form a preassembled component (8), wherein an insulation (10, 10') is provided between an inner wall (9) of the housing (1) and each of the contact sheets (7, 7'), wherein the insulation (10, 10') is also part of the preassembled component, characterised in that all contact areas of PTC elements, the two contact sheets (7, 7') and the insulation (10, 10') are glued together and wherein the insulation (10, 10') is U-shaped.
  2. The heat exchanger (2) according to claim 1, characterised in that the housing (1) is dustproof and waterproof.
  3. The heat exchanger (2) according to claim 1 or 2, characterised in that the housing (1) is made from electrically conductive material, in particular aluminium.
  4. The heat exchanger (2) according to one or more of claims 1 to 3, characterised in that the housing (1) consists of two half shells (3, 3') which are tightly joined together, in particular glued, welded or seamed.
  5. The heat exchanger (2) according to one or more of claims 1 to 3, characterised in that the housing (1) is made as a closed tube, in particular from an extruded tube.
  6. The heat exchanger (2) according to one of the preceding claims, characterised in that the insulation (10, 10') is made from polyimide, silicone, silicone filled with a ceramic or ceramic, in particular aluminium oxide, aluminium nitride or boron nitride.
EP10290296.2A 2010-06-04 2010-06-04 Heat exchanger Active EP2393336B1 (en)

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EP2393336A8 EP2393336A8 (en) 2012-02-15
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EP2608633B1 (en) 2011-12-22 2020-08-26 Eberspächer catem GmbH & Co. KG Element which produces heat
DE102012013770A1 (en) 2012-07-11 2014-01-16 Eberspächer Catem Gmbh & Co. Kg Heat generating element
DE102012107985B4 (en) 2012-08-29 2023-06-22 Borgwarner Ludwigsburg Gmbh heater
EP2731400A1 (en) * 2012-11-12 2014-05-14 Betacera Inc. Electric heating apparatus with waterproof mechanism
EP2933577B1 (en) 2014-04-14 2017-12-06 Mahle Behr France Rouffach S.A.S Electric heating device
EP4333558A1 (en) * 2022-08-31 2024-03-06 MAHLE International GmbH Ptc heater and method

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DE50001877D1 (en) * 2000-08-25 2003-05-28 Catem Gmbh & Co Kg PTC heater with adhesive
FR2826829B1 (en) * 2001-06-27 2004-04-02 Valeo Climatisation HEAT EXCHANGER WITH HEATING BARS CONTAINING RESISTIVE ELEMENTS
EP1657963B1 (en) * 2004-11-11 2007-03-14 DBK David + Baader GmbH Electrical printed circuit board heating component, printed circuit board and heating process
ES2303167T3 (en) 2005-09-23 2008-08-01 CATEM GMBH & CO. KG HEAT GENERATING ELEMENT OF A HEATING DEVICE.
ES2360885T3 (en) 2005-09-23 2011-06-10 EBERSPÄCHER CATEM GMBH & CO. KG HEAT GENERATING ELEMENT OF A HEATING DEVICE.
ES2303712T3 (en) 2005-09-23 2008-08-16 CATEM GMBH & CO. KG HEAT GENERATING ELEMENT FOR A HEATING DEVICE.
US20080173637A1 (en) * 2005-11-02 2008-07-24 Koshiro Taguchi Insulated waterproof heater
DE502006003627D1 (en) 2006-10-25 2009-06-10 Catem Gmbh & Co Kg Heat generating element for an electric heater and method of making the same
ES2345574T3 (en) 2008-04-11 2010-09-27 EBERSPACHER CATEM GMBH & CO. KG HEAT GENERATING ELEMENT AND HEATING DEVICE THAT INCLUDES A HEAT GENERATING ELEMENT.
EP2190258A1 (en) * 2008-11-20 2010-05-26 Behr France Rouffach SAS Heat exchanger

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EP2393336A8 (en) 2012-02-15

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