EP1405547B2 - Electric heating device, in particular for a motor vehicle heating installation - Google Patents

Electric heating device, in particular for a motor vehicle heating installation Download PDF

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Publication number
EP1405547B2
EP1405547B2 EP02762537.5A EP02762537A EP1405547B2 EP 1405547 B2 EP1405547 B2 EP 1405547B2 EP 02762537 A EP02762537 A EP 02762537A EP 1405547 B2 EP1405547 B2 EP 1405547B2
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EP
European Patent Office
Prior art keywords
heating
bars
heating device
heat
bar
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EP02762537.5A
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German (de)
French (fr)
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EP1405547B8 (en
EP1405547A1 (en
EP1405547B1 (en
Inventor
Noureddine Nadir
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Valeo Systemes Thermiques SAS
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Valeo Systemes Thermiques SAS
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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
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0227—Applications
    • H05B1/023—Industrial applications
    • H05B1/0236—Industrial applications for vehicles
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
    • H05B3/22—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible
    • 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

Definitions

  • the invention relates to air heating installations, in particular for motor vehicles.
  • the heating of the air intended for heating the passenger compartment of a motor vehicle with a heat engine, as well as for defogging and deicing, is ensured by heat exchange between an air flow and a engine coolant.
  • Such a device generally uses resistive elements with a positive temperature coefficient (PTC). These elements, because of the strong increase in their electrical resistance from a temperature threshold (Curie point), give the heating device the ability to self-regulate as a function of temperature, which avoids any excessive heating. potentially dangerous.
  • PTC positive temperature coefficient
  • PTC resistors are usually in the form of blocks or stones that are arranged in bars.
  • Each bar comprises a plurality of stones spaced from each other and fed in parallel between two electrodes.
  • One of the electrodes may be constituted by a tube enclosing the bar, while the other electrode is in the form of a metal strip introduced into the bar and isolated from the wall of the tube.
  • Several heating bars are arranged in a support frame and are in contact with radiant elements such as spacers arranged between the bars or fins which extend transversely to the bars and are traversed by them.
  • the object of the invention is to simplify the implementation of an electric heating device having an integrated control electronics, in particular to reduce the cost thereof compared to the devices of the prior art.
  • an electric heating device comprising a plurality of heating bars each having resistive elements arranged in parallel between two electrical conductors extending along the bar, an electronic circuit with power components for the switching of the electrical supply of the bars, and a heat dissipation plate produced by the components exposed to a flow of air passing through the heating device, the electronic circuit with the power components being supported by the heat dissipation plate mounted directly on the heating bars, at one end thereof, each heating bar having a tube containing the resistive elements, the heat dissipating plate being mounted at one end of the tubes of the heating bars, in which device the tube constitutes one electrical conductors in contact with the resistive elements of the bar.
  • the heat dissipating plate carrying the electronic circuit integrates into the heating device in the manner of a radiant element mounted on the heating bars.
  • the electronic circuit is carried by a printed circuit board supported by the heat dissipation plate. At least one of the electrical conductors extending along each bar passes through the heat sink plate and the printed circuit board to be connected thereto.
  • FIGS. 1 and 2 schematically show a heating device according to the invention for example for an air heating installation for a motor vehicle.
  • the heating device comprises several heating bars 10 (three are shown on the figure 1 , but their number may be larger).
  • the heating bars are associated with radiating elements in the form of fins 12.
  • the bars 10 extend transversely with respect to the fins 12 by being forced into passages formed in the fins, so that a good thermal contact is obtained. established between the bars 10 and the fins 12.
  • the bars 10 and fins 12 are mounted inside a frame 14.
  • the bars 10 each comprise a tube 100 of flattened shape in which resistive elements 102 are arranged spaced apart from each other along the tube 100.
  • the resistive elements 102 for example PTC stones are clamped between an inner wall of the tube 100 and an electrode 104 extending along the tube 100, inside thereof.
  • the tube 100 is made of an electrically conductive metal, for example aluminum.
  • the electrode 104 is in the form of a metal strip, for example also made of aluminum.
  • An electrical insulator 106 is interposed between the electrode 104 and the inner wall of the tube 100 opposite to that in contact with the resistive elements 102.
  • the electrical supply of the resistive elements of the bars 10 is provided by means of an electronic circuit 20.
  • This comprises a printed circuit board 200 mounted on a heat dissipating plate 202 with the interposition of an insulating layer 204.
  • the layer 204 is an electrical insulating material but thermal conductor in the form of sheet, for example a paper loaded with glass.
  • the printed circuit board 200 is attached to the heat dissipation plate 202, for example by screw-nuts 203, or by stripping.
  • the heat dissipating plate 202 for example alumina, is mounted on the ends of the bars 10.
  • the plate 202 and the fins 12 are engaged at their ends in housings formed in opposite amounts of the frame 14.
  • the plate 202 has passages 206 in which the ends of the tubes 100 are force-fitted and / or fixed by screw-nuts.
  • end portions 108 of the tubes 100 having passed through the passages 206 are cut and folded on the side of the plate 202 opposite that where the bars 10 are and are secured to the plate 202 for example by welding.
  • the plate 202 is recessed around the passages 206 to accommodate the portions 108 of the tubes 100. This arrangement can confer a better resistance to vibrations at the connection between the bars 10 and the plate 202.
  • a good electrical and thermal connection is established between the bars 10 and the plate 202.
  • This plate is connected to a reference potential (ground or potential + V as provided for example by a motor vehicle battery) to which the tubes 100 and the fins 12 are therefore worn.
  • the electrodes 104 of the bars 10 are extended beyond the end thereof connected to the plate 202 and pass through the passages 206 as well as passages formed through the insulating layer 204 and the printed circuit board 200. ends 104a of the electrodes 104 projecting above the plate 200 are connected to the circuits thereof by welding, for example on connecting tabs 201.
  • the plate 200 carries components 208 which switch the power supply of the bars 10 by selectively connecting the electrodes 104 to a power supply terminal (not shown) brought to a potential + V for example the positive potential provided by a motor vehicle battery.
  • a protective cover 216 may cover the circuit 20 while being fixed on the plate 202.
  • the figure 4 shows the electrical circuit of the heater.
  • the components 208 for example power transistors, are controlled by a control unit 210 to connect the electrodes 104 to the + V potential and supply the resistive elements 102.
  • the control unit 210 comprises a microprocessor connected via a bus interface to a data bus 212. The latter receives in a known manner control signals produced by a central air conditioning control unit according to needs expressed or detected in electric heating. According to these needs, one or more heating bars are controlled.
  • the heat produced by the electronic circuit 20, in particular the power transistors 208, is discharged through the plate.
  • the dissipation plate 202 is exposed to the flow of air passing through the heating device (arrows F of the figure 2 ). In this way, a contribution is made both to the desired reheating of this air flow and to the necessary cooling of the components 208.
  • the bars 10 are devoid of resistive elements in the immediate vicinity of the ends connected to the plate 202 .
  • Another advantage of the device described above lies in the simplicity and the minimal cost of the electrical connection between the bars 10 and the electronic circuit 20.
  • the electrical conductors supplying the resistive elements of the bars may consist of two electrodes housed in the tubes 100 and passing through the heat dissipating plate 202, the insulator 204 and the printed circuit board 200 to be connected. to it, for example in the same way as the electrode 104 of the mode realization of Figures 1 and 2 .

Abstract

The invention concerns an electric heating device, in particular for heating a motor vehicle, comprising heating bars (10) with resistive elements (102) arranged in parallel between two electrical conductors extending along the bar, an electronic circuit (20) with power components (208) for switching the electric supply of the bars, and means (202) for dissipating the heat produced by the components exposed to an air flow passing through the heating device, the electronic circuit (20) together with the power components (208) being supported by a heat dissipating plate (202) mounted directly on the heating bars (10), at one end thereof, each heating bar (10) including a tube (100) containing resistive elements, the heat dissipating plate being mounted at one end of the tubes of the heating bars, device wherein the tube forms one of the electrical conductors in contact with the resistive elements of the bar.

Description

Arrière-plan de l'inventionBackground of the invention

L'invention concerne les installations de chauffage d'air, en particulier pour des véhicules automobiles.The invention relates to air heating installations, in particular for motor vehicles.

De façon bien connue, le réchauffage de l'air destiné au chauffage de l'habitacle d'un véhicule automobile à moteur thermique, ainsi qu'au désembuage et au dégivrage, est assuré par échange de chaleur entre un flux d'air et un liquide de refroidissement du moteur.In a well-known manner, the heating of the air intended for heating the passenger compartment of a motor vehicle with a heat engine, as well as for defogging and deicing, is ensured by heat exchange between an air flow and a engine coolant.

Il est connu également qu'au démarrage et pendant un certain laps de temps suivant le démarrage, les calories véhiculées par le liquide de refroidissement du moteur peuvent être insuffisantes pour assurer un chauffage rapide et efficace de l'habitacle. Cela est observé plus particulièrement avec certains types de moteur et présente un réel inconvénient par temps très froid car non seulement la température interne de l'habitacle ne peut être élevée rapidement, mais en outre les fonctions de dégivrage et désembuage ne peuvent être assurées efficacement.It is also known that at startup and for a certain period of time after starting, the calories carried by the engine coolant may be insufficient to ensure rapid and efficient heating of the passenger compartment. This is observed more particularly with certain types of engine and has a real disadvantage in very cold weather because not only the internal temperature of the passenger compartment can be raised quickly, but also the functions of defrosting and defogging can not be ensured effectively.

Pour remédier à ces inconvénients, il a été proposé de monter un dispositif de chauffage électrique complémentaire dans le flux d'air dirigé vers l'habitacle, immédiatement en aval de l'échangeur de chaleur parcouru par le liquide de refroidissement du moteur.To overcome these drawbacks, it has been proposed to mount a complementary electric heating device in the air flow directed towards the passenger compartment, immediately downstream of the heat exchanger through which the engine coolant flows.

Un tel dispositif utilise généralement des éléments résistifs à coefficient de température positif (CTP). Ces éléments, du fait de la forte augmentation de leur résistance électrique à partir d'un seuil de température (point de Curie), confèrent au dispositif de chauffage la capacité de s'autoréguler en fonction de la température, ce qui évite tout échauffement excessif potentiellement dangereux.Such a device generally uses resistive elements with a positive temperature coefficient (PTC). These elements, because of the strong increase in their electrical resistance from a temperature threshold (Curie point), give the heating device the ability to self-regulate as a function of temperature, which avoids any excessive heating. potentially dangerous.

Les résistances CTP se présentent habituellement sous forme de blocs ou pierres qui sont disposés dans des barreaux. Chaque barreau comprend une pluralité de pierres espacées les unes des autres et alimentées en parallèle entre deux électrodes. L'une des électrodes peut être constituée par un tube enfermant le barreau, tandis que l'autre électrode se présente sous forme d'une bande métallique introduite dans le barreau et isolée de la paroi du tube. Plusieurs barreaux chauffants sont disposés dans un cadre support et sont en contact avec des éléments radiants tels que des entretoises disposées entre les barreaux ou des ailettes qui s'étendent transversalement par rapport aux barreaux et sont traversées par ceux-ci.PTC resistors are usually in the form of blocks or stones that are arranged in bars. Each bar comprises a plurality of stones spaced from each other and fed in parallel between two electrodes. One of the electrodes may be constituted by a tube enclosing the bar, while the other electrode is in the form of a metal strip introduced into the bar and isolated from the wall of the tube. Several heating bars are arranged in a support frame and are in contact with radiant elements such as spacers arranged between the bars or fins which extend transversely to the bars and are traversed by them.

Afin de réduire le câblage nécessaire à la commande des barreaux chauffants, notamment lorsque ceux-ci sont commandés individuellement de façon sélective pour ajuster la puissance délivrée par le dispositif de chauffage, il a été proposé dans le document EP 0 901 311 de loger cette électronique de commande sur le cadre dans lequel sont montés les barreaux chauffants. La commutation de l'alimentation des barreaux est assurée au moyen de composants tels que des transistors de puissance. Ceux-ci sont munis de radiateurs exposés au flux d'air traversant le dispositif de chauffage.In order to reduce the wiring necessary for the control of the heating bars, especially when they are selectively individually controlled to adjust the power delivered by the heating device, it has been proposed in the document EP 0 901 311 to house this control electronics on the frame in which the heating bars are mounted. The switching of the power supply of the bars is ensured by means of components such as power transistors. These are equipped with radiators exposed to the flow of air passing through the heating device.

Objet et résumé de l'inventionObject and summary of the invention

L'invention a pour but de simplifier la réalisation d'un dispositif de chauffage électrique ayant une électronique de commande intégrée, notamment pour en réduire le coût par rapport aux dispositifs de l'art antérieur.The object of the invention is to simplify the implementation of an electric heating device having an integrated control electronics, in particular to reduce the cost thereof compared to the devices of the prior art.

Ce but est atteint grâce à un dispositif de chauffage électrique comprenant une pluralité de barreaux chauffants ayant chacun des éléments résistifs disposés en parallèle entre deux conducteurs électriques s'étendant le long du barreau, un circuit électronique avec des composants de puissance pour la commutation de l'alimentation électriques des barreaux, et une plaque de dissipation de la chaleur produite par les composants exposée à un flux d'air traversant le dispositif de chauffage, le circuit électronique avec les composants de puissance étant supporté par la plaque de dissipation de chaleur montée directement sur les barreaux chauffants, à une extrémité de ceux-ci, chaque barreau chauffant comportant un tube contenant les éléments résistifs, la plaque de dissipation de chaleur étant montée à une extrémité des tubes des barreaux chauffants, dispositif dans lequel le tube constitue l'un des conducteurs électriques en contact avec les éléments résistifs du barreau.This object is achieved by means of an electric heating device comprising a plurality of heating bars each having resistive elements arranged in parallel between two electrical conductors extending along the bar, an electronic circuit with power components for the switching of the electrical supply of the bars, and a heat dissipation plate produced by the components exposed to a flow of air passing through the heating device, the electronic circuit with the power components being supported by the heat dissipation plate mounted directly on the heating bars, at one end thereof, each heating bar having a tube containing the resistive elements, the heat dissipating plate being mounted at one end of the tubes of the heating bars, in which device the tube constitutes one electrical conductors in contact with the resistive elements of the bar.

Ainsi, la plaque de dissipation de chaleur portant le circuit électronique s'intègre dans le dispositif de chauffage à la manière d'un élément radiant monté sur les barreaux chauffants.Thus, the heat dissipating plate carrying the electronic circuit integrates into the heating device in the manner of a radiant element mounted on the heating bars.

Selon une particularité du dispositif de chauffage, le circuit électronique est porté par une plaque de circuit imprimé supportée par la plaque de dissipation de chaleur. Au moins l'un des conducteurs électriques s'étendant le long de chaque barreau traverse la plaque de dissipation de chaleur et la plaque de circuit imprimé pour être raccordé à celle-ci.According to a feature of the heating device, the electronic circuit is carried by a printed circuit board supported by the heat dissipation plate. At least one of the electrical conductors extending along each bar passes through the heat sink plate and the printed circuit board to be connected thereto.

Ainsi, le raccordement électrique entre les barreaux chauffants et le circuit électrique est-il très simplifié.Thus, the electrical connection between the heating bars and the electrical circuit is very simplified.

Brève description des dessinsBrief description of the drawings

L'invention sera mieux comprise à la lecture de la description faite ci-après à titre indicatif, mais non limitatif, en référence aux dessins annexés sur lesquels :

  • la figure 1 est une vue partielle en coupe et en Ă©lĂ©vation d'un mode de rĂ©alisation d'un dispositif de chauffage conforme Ă  l'invention ;
  • la figure 2 est une vue partielle en coupe selon le plan II-II de la figure 1 ;
  • la figure 3 est une vue de dĂ©tail montrant une variante de rĂ©alisation du dispositif de chauffage de la figure 1 ; et
  • la figure 4 est un schĂ©ma Ă©lectrique du dispositif de chauffage de la figure 1.
The invention will be better understood on reading the description given below by way of indication, but without limitation, with reference to the appended drawings in which:
  • the figure 1 is a partial view in section and elevation of an embodiment of a heating device according to the invention;
  • the figure 2 is a partial sectional view according to plan II-II of the figure 1 ;
  • the figure 3 is a detail view showing an alternative embodiment of the heating device of the figure 1 ; and
  • the figure 4 is a circuit diagram of the heater of the figure 1 .

Description détaillée de modes de réalisation de l'inventionDETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION

Les figures 1 et 2 montrent schématiquement un dispositif de chauffage conforme à l'invention destiné par exemple à une installation de chauffage d'air pour un véhicule automobile.The Figures 1 and 2 schematically show a heating device according to the invention for example for an air heating installation for a motor vehicle.

Le dispositif de chauffage comprend plusieurs barreaux chauffants 10 (trois sont montrés sur la figure 1,mais leur nombre peut être plus grand). Les barreaux chauffants sont associés à des éléments radiants sous forme d'ailettes 12. Les barreaux 10 s'étendent transversalement par rapport aux ailettes 12 en étant engagés à force dans des passages formés dans les ailettes, de sorte qu'un bon contact thermique est établi entre les barreaux 10 et les ailettes 12. Les barreaux 10 et ailettes 12 sont montés à l'intérieur d'un cadre 14.The heating device comprises several heating bars 10 (three are shown on the figure 1 , but their number may be larger). The heating bars are associated with radiating elements in the form of fins 12. The bars 10 extend transversely with respect to the fins 12 by being forced into passages formed in the fins, so that a good thermal contact is obtained. established between the bars 10 and the fins 12. The bars 10 and fins 12 are mounted inside a frame 14.

Les barreaux 10 comportent chacun un tube 100 de forme aplatie dans lequel sont disposés des éléments résistifs 102 espacés les uns des autres le long du tube 100.The bars 10 each comprise a tube 100 of flattened shape in which resistive elements 102 are arranged spaced apart from each other along the tube 100.

Les éléments résistifs 102, par exemple des pierres CTP sont serrées entre une paroi interne du tube 100 et une électrode 104 s'étendant le long du tube 100, à l'intérieur de celui-ci. Le tube 100 est en un métal conducteur de l'électricité, par exemple en aluminium. L'électrode 104 est sous forme d'une bande métallique, par exemple également en aluminium. Un isolant électrique 106 est interposé entre l'électrode 104 et la paroi interne du tube 100 opposée à celle en contact avec les éléments résistifs 102.The resistive elements 102, for example PTC stones are clamped between an inner wall of the tube 100 and an electrode 104 extending along the tube 100, inside thereof. The tube 100 is made of an electrically conductive metal, for example aluminum. The electrode 104 is in the form of a metal strip, for example also made of aluminum. An electrical insulator 106 is interposed between the electrode 104 and the inner wall of the tube 100 opposite to that in contact with the resistive elements 102.

L'alimentation électrique des éléments résistifs des barreaux 10 est assurée au moyen d'un circuit électronique 20. Celui-ci comporte une plaque de circuit imprimé 200 montée sur une plaque de dissipation de chaleur 202 avec interposition d'une couche isolante 204. La couche 204 est en un matériau isolant électrique mais conducteur thermique sous forme de feuille, par exemple un papier chargé de verre. La plaque de circuit imprimé 200 est fixée à la plaque 202 de dissipation de chaleur, par exemple par vis-écrous 203, ou par boutrolage.The electrical supply of the resistive elements of the bars 10 is provided by means of an electronic circuit 20. This comprises a printed circuit board 200 mounted on a heat dissipating plate 202 with the interposition of an insulating layer 204. The layer 204 is an electrical insulating material but thermal conductor in the form of sheet, for example a paper loaded with glass. The printed circuit board 200 is attached to the heat dissipation plate 202, for example by screw-nuts 203, or by stripping.

La plaque de dissipation de chaleur 202, par exemple en alumine est montée sur les extrémités des barreaux 10. La plaque 202 et les ailettes 12 sont engagées à leurs extrémités dans des logements formés dans des montants opposés du cadre 14.The heat dissipating plate 202, for example alumina, is mounted on the ends of the bars 10. The plate 202 and the fins 12 are engaged at their ends in housings formed in opposite amounts of the frame 14.

Dans le mode de réalisation des figures 1 et 2, la plaque 202 présente des passages 206 dans lesquels les extrémités des tubes 100 sont emmanchées à force et/ou fixées par vis-écrous.In the embodiment of Figures 1 and 2 , the plate 202 has passages 206 in which the ends of the tubes 100 are force-fitted and / or fixed by screw-nuts.

Dans le mode de réalisation de la figure 3, des parties d'extrémité 108 des tubes 100 ayant traversé les passages 206 sont découpées et rabattues sur le côté de la plaque 202 opposé à celui où se trouvent les barreaux 10 et sont solidarisées à la plaque 202 par exemple par soudage. La plaque 202 est évidée autour des passages 206 pour loger les parties 108 des tubes 100. Ce montage peut conférer une meilleure tenue aux vibrations à la liaison entre les barreaux 10 et la plaque 202.In the embodiment of the figure 3 , end portions 108 of the tubes 100 having passed through the passages 206 are cut and folded on the side of the plate 202 opposite that where the bars 10 are and are secured to the plate 202 for example by welding. The plate 202 is recessed around the passages 206 to accommodate the portions 108 of the tubes 100. This arrangement can confer a better resistance to vibrations at the connection between the bars 10 and the plate 202.

Dans les deux modes de réalisation ci-dessus, une bonne liaison électrique et thermique est établie entre les barreaux 10 et la plaque 202. Celle-ci est reliée à un potentiel de référence (masse ou potentiel +V tel que fourni par exemple par une batterie de véhicule automobile) auquel les tubes 100 et les ailettes 12 sont par conséquent portés.In the two embodiments above, a good electrical and thermal connection is established between the bars 10 and the plate 202. This plate is connected to a reference potential (ground or potential + V as provided for example by a motor vehicle battery) to which the tubes 100 and the fins 12 are therefore worn.

Les électrodes 104 des barreaux 10 sont prolongées au-delà de l'extrémité de ceux-ci reliée à la plaque 202 et traversent les passages 206 ainsi que des passages formés à travers la couche isolante 204 ainsi que la plaque de circuit imprimé 200. Les extrémités 104a des électrodes 104 faisant saillie au-dessus de la plaque 200 sont reliées aux circuits de celles-ci par soudage par exemple sur des pattes de liaison 201.The electrodes 104 of the bars 10 are extended beyond the end thereof connected to the plate 202 and pass through the passages 206 as well as passages formed through the insulating layer 204 and the printed circuit board 200. ends 104a of the electrodes 104 projecting above the plate 200 are connected to the circuits thereof by welding, for example on connecting tabs 201.

La plaque 200 porte des composants 208 qui assurent la commutation de l'alimentation électrique des barreaux 10 en reliant de façon sélective les électrodes 104 à une borne d'alimentation (non représentée) portée à un potentiel +V par exemple le potentiel positif fourni par une batterie de véhicule automobile. Un capot de protection 216 peut recouvrir le circuit 20 en étant fixé sur la plaque 202.The plate 200 carries components 208 which switch the power supply of the bars 10 by selectively connecting the electrodes 104 to a power supply terminal (not shown) brought to a potential + V for example the positive potential provided by a motor vehicle battery. A protective cover 216 may cover the circuit 20 while being fixed on the plate 202.

La figure 4 montre le circuit électrique du dispositif de chauffage. Les composants 208, par exemple des transistors de puissance, sont commandés par une unité de commande 210 pour relier les électrodes 104 au potentiel +V et alimenter les éléments résistifs 102. L'unité de commande 210 comprend un microprocesseur relié par une interface de bus à un bus de données 212. Ce dernier reçoit de façon connue des signaux de commande produits par une unité centrale de commande de climatisation en fonction de besoins exprimés ou détectés en chauffage électrique. Selon ces besoins, un ou plusieurs barreaux chauffants sont commandés.The figure 4 shows the electrical circuit of the heater. The components 208, for example power transistors, are controlled by a control unit 210 to connect the electrodes 104 to the + V potential and supply the resistive elements 102. The control unit 210 comprises a microprocessor connected via a bus interface to a data bus 212. The latter receives in a known manner control signals produced by a central air conditioning control unit according to needs expressed or detected in electric heating. According to these needs, one or more heating bars are controlled.

La chaleur produite par le circuit électronique 20, notamment les transistors de puissance 208 est évacuée par la plaque.The heat produced by the electronic circuit 20, in particular the power transistors 208, is discharged through the plate.

La plaque de dissipation 202 se trouve exposée au flux d'air traversant le dispositif de chauffage (flèches F de la figure 2). De la sorte, une contribution est apportée à la fois au réchauffage souhaité de ce flux d'air et au refroidissement nécessaire des composants 208. De préférence, les barreaux 10 sont dépourvus d'éléments résistifs au voisinage immédiat des extrémités reliées à la plaque 202.The dissipation plate 202 is exposed to the flow of air passing through the heating device (arrows F of the figure 2 ). In this way, a contribution is made both to the desired reheating of this air flow and to the necessary cooling of the components 208. Preferably, the bars 10 are devoid of resistive elements in the immediate vicinity of the ends connected to the plate 202 .

Un autre avantage du dispositif décrit ci-avant réside dans la simplicité et le coût minimal de la connexion électrique entre les barreaux 10 et le circuit électronique 20.Another advantage of the device described above lies in the simplicity and the minimal cost of the electrical connection between the bars 10 and the electronic circuit 20.

On notera toutefois que les conducteurs électriques d'alimentation des éléments résistifs des barreaux pourront être constitués par deux électrodes logées dans les tubes 100 et traversant la plaque de dissipation de chaleur 202, l'isolant 204 et la plaque de circuit imprimé 200 pour être reliés à celle-ci, par exemple de la même manière que l'électrode 104 du mode de réalisation des figures 1 et 2.It will be noted, however, that the electrical conductors supplying the resistive elements of the bars may consist of two electrodes housed in the tubes 100 and passing through the heat dissipating plate 202, the insulator 204 and the printed circuit board 200 to be connected. to it, for example in the same way as the electrode 104 of the mode realization of Figures 1 and 2 .

Claims (8)

  1. Electric heating device comprising a plurality of heating bars (10) each having resistance elements (102) placed in parallel between two electric conductors extending along the bar, an electronic circuit (20) with power components (208) for switching the electric supply of the bars, and a plate (202) for dissipating heat generated by the components (208), the said plate (202) being exposed to a flow of air passing through the heating device, the electronic circuit (20) with the power components (208) being supported by the heat-dissipation plate (202) mounted directly on the heating bars (10), at one end of the latter, each heating bar (10) comprising a tube (100) containing the resistance elements (102), the heat-dissipation plate (202) being mounted at one end of the tubes (100) of the heating bars, characterized in that the tube (100) forms one of the electric conductors in contact with the resistance elements (102) of the bar (10).
  2. Heating device according to Claim 1, characterized in that the heat-dissipation plate (202) comprises passageways (206) in which the ends of the tubes (100) are engaged.
  3. Heating device according to Claim 2, characterized in that the ends of the tubes (100) are force-fitted into the said passageways.
  4. Heating device according to Claim 2, characterized in that the ends of the tubes (100) are fastened into said passageways by screws-nuts.
  5. Heating device according to Claim 2, characterized in that the end portions (108) of the tubes (100) are folded onto the heat-dissipation plate (202) on the side of the latter that is opposite to that on which the heating bars are found (10).
  6. Heating device according to any one of Claims 1 to 5, characterized in that the electronic circuit is supported by a printed circuit board (200) supported by the heat-dissipation plate (202).
  7. Heating device according to Claim 6, characterized in that an electric insulator (204) in sheet form is interposed between the printed circuit board (200) and the heat-dissipation plate (202).
  8. Heating device according to either one of Claims 6 and 7, characterized in that at least one (104) of the electric conductors extending along each bar (10) passes through the heat-dissipation plate (202) and the printed circuit board (200) in order to be connected to the latter.
EP02762537.5A 2001-07-09 2002-07-05 Electric heating device, in particular for a motor vehicle heating installation Expired - Lifetime EP1405547B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0109078 2001-07-09
FR0109078A FR2827113B1 (en) 2001-07-09 2001-07-09 ELECTRIC HEATING DEVICE, PARTICULARLY FOR A MOTOR VEHICLE HEATING SYSTEM
PCT/FR2002/002374 WO2003009645A1 (en) 2001-07-09 2002-07-05 Electric heating device, in particular for a motor vehicle heating installation

Publications (4)

Publication Number Publication Date
EP1405547A1 EP1405547A1 (en) 2004-04-07
EP1405547B1 EP1405547B1 (en) 2009-04-29
EP1405547B8 EP1405547B8 (en) 2009-08-26
EP1405547B2 true EP1405547B2 (en) 2014-12-31

Family

ID=8865273

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02762537.5A Expired - Lifetime EP1405547B2 (en) 2001-07-09 2002-07-05 Electric heating device, in particular for a motor vehicle heating installation

Country Status (6)

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EP (1) EP1405547B2 (en)
AT (1) ATE430461T1 (en)
DE (1) DE60232148D1 (en)
ES (1) ES2324602T3 (en)
FR (1) FR2827113B1 (en)
WO (1) WO2003009645A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2859349B1 (en) * 2003-08-29 2006-12-01 Valeo Climatisation ELECTRIC HEATING ELEMENT FOR VENTILATION, HEATING AND / OR AIR CONDITIONING APPARATUS
ES2376387T3 (en) * 2006-06-28 2012-03-13 Eberspächer Catem Gmbh & Co. Kg ELECTRICAL HEATING DEVICE.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19848169A1 (en) † 1997-11-05 1999-05-06 Eichenauer Gmbh & Co Kg F Heating driver's cabin of commercial vehicles rapidly
DE19911204A1 (en) † 1999-03-13 2000-09-14 Behr Gmbh & Co Electronic components cooling device for use in motor vehicle, uses aluminum or aluminum-alloy support fastened to radiator, for carrying electronic components
EP1390219B1 (en) † 2001-01-17 2004-09-22 Beru Aktiengesellschaft Electric heating system for a motor vehicle

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19925757C5 (en) * 1999-06-05 2011-02-10 Behr France Rouffach S.A.S. Heating device, in particular for a motor vehicle
DE19957452B4 (en) * 1999-11-19 2019-03-28 Mahle International Gmbh Electric heating device, in particular for a motor vehicle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19848169A1 (en) † 1997-11-05 1999-05-06 Eichenauer Gmbh & Co Kg F Heating driver's cabin of commercial vehicles rapidly
DE19911204A1 (en) † 1999-03-13 2000-09-14 Behr Gmbh & Co Electronic components cooling device for use in motor vehicle, uses aluminum or aluminum-alloy support fastened to radiator, for carrying electronic components
EP1390219B1 (en) † 2001-01-17 2004-09-22 Beru Aktiengesellschaft Electric heating system for a motor vehicle

Also Published As

Publication number Publication date
ATE430461T1 (en) 2009-05-15
WO2003009645A1 (en) 2003-01-30
FR2827113B1 (en) 2003-10-17
EP1405547B8 (en) 2009-08-26
ES2324602T3 (en) 2009-08-11
EP1405547A1 (en) 2004-04-07
FR2827113A1 (en) 2003-01-10
DE60232148D1 (en) 2009-06-10
EP1405547B1 (en) 2009-04-29

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