EP4025828B1 - Radiator with optimised cooling capacity for motor vehicle headlamp - Google Patents

Radiator with optimised cooling capacity for motor vehicle headlamp Download PDF

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Publication number
EP4025828B1
EP4025828B1 EP20775369.0A EP20775369A EP4025828B1 EP 4025828 B1 EP4025828 B1 EP 4025828B1 EP 20775369 A EP20775369 A EP 20775369A EP 4025828 B1 EP4025828 B1 EP 4025828B1
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EP
European Patent Office
Prior art keywords
radiator
bearing
openings
dissipation surface
lower bearing
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EP20775369.0A
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German (de)
French (fr)
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EP4025828A1 (en
Inventor
Filipe Videira
Bruno DESSI
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Stellantis Auto SAS
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Stellantis Auto SAS
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Publication of EP4025828A1 publication Critical patent/EP4025828A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40—Cooling of lighting devices
    • F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F21S41/148—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device the main emission direction of the LED being perpendicular to the optical axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/19—Attachment of light sources or lamp holders
    • F21S41/192—Details of lamp holders, terminals or connectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40—Cooling of lighting devices
    • F21S45/42—Forced cooling
    • F21S45/43—Forced cooling using gas
    • F21S45/435—Forced cooling using gas circulating the gas within a closed system

Definitions

  • the invention applies to the field of cooling motor vehicle headlights.
  • the invention relates to a radiator intended to ensure the cooling of optical modules fitted to motor vehicles and whose heat dissipation capacity is optimized.
  • Automotive vehicle lighting systems include optical modules with electronic components which tend to heat up (LED lamps, printed circuits, etc.). These modules are therefore equipped with cooling means to guarantee their proper functioning in the presence of strong thermal stresses.
  • these cooling means include radiators associated, if heat dissipation by convection proves insufficient, with complementary means, for example, fans which make it possible to force the air flow towards the electronic components.
  • a light-emitting diode motor vehicle lighting module comprises a housing in which are housed a connected headlight and a radiator provided with at least one cooling channel starting from an air inlet located at the front of the headlight .
  • the patent application FR3033622 describes a motor vehicle headlight provided with a radiator formed of a metal sheet with a plurality of folds, each forming a heat dissipation fin.
  • an automatic cut-off of the electrical supply is generally provided or, at least, a reduction in the power of the lighting module, which is detrimental to the safety of the vehicle.
  • the invention aims to provide a technical solution making it possible to ensure effective cooling of all the electronic components of the projector by optimizing the convection capacity of the radiator by better distribution of its heat dissipation surfaces.
  • the radiator comprises at least two electronic components supported and fixed, respectively, on a lower bearing and an upper bearing of the radiator, each having a heat dissipation surface, characterized in that said radiator comprises lower openings and upper openings passing through said bearings and opening onto each bearing at the level of its surface heat dissipation.
  • the radiator comprises lateral fins and underlying fins extending perpendicularly and under the lower bearing.
  • the lower openings are formed of parallel slots opening, on the one hand, between the underlying fins and on the other hand, on a projecting part of the lower bearing.
  • the lower openings are provided on either side of the lower landing.
  • the upper openings open onto the interior edge of the upper landing.
  • the upper openings are formed of grooves extending between the respective dissipation surfaces of the lower bearing and the upper bearing.
  • the lower bearing is spaced from its dissipation surface by being delimited by beveled notches.
  • the upper bearing is coplanar with its dissipation surface.
  • the upper bearing is divided into two side plates framing the lower bearing which extends beyond the edge of the upper bearing.
  • Another object of the invention is a motor vehicle headlight equipped with a cooling radiator with optimized convection capacity having the characteristics defined above.
  • the radiator of the invention ensures efficient and rapid cooling of electronic components (and, in particular, printed circuit boards), fixed on its two bearings thanks to the openings which make it possible to avoid disturbance of the transfer air flows thermal.
  • the calories released by the electronic components are evacuated either by convection to the outside, or by circulation of pulsed air through the radiator by means of an auxiliary fan.
  • the presence of the openings also makes it possible to lighten the radiator while increasing the total dissipation surface.
  • the radiator of the invention also offers an economic gain by using a lower quantity of on-board material.
  • the radiator of the invention thus contributes to improving quality by reducing the risk of electronic failure and by simplifying the protection of electronic components.
  • the invention relates to the field of cooling headlights integrated into lighting and signaling systems fitted to motor vehicles. More particularly, the invention concerns the optimization of the capacity of the radiator to dissipate the heat produced by the electronic cards of the projector module.
  • FIG. 1 represents a projector P equipped with a radiator 1 intended to cool at least two electronic components and here two printed circuit boards C1, C2 supported and fixed, respectively, on a lower bearing 1a and an upper bearing 1b of the radiator 1.
  • Each level 1a, 1b is associated with a heat dissipation surface 11a, 11b which is released by the cards C1, C2, as illustrated by the figures 2A And 3 .
  • the radiator 1 comprises, in a traditional manner, lateral fins 12 and underlying fins 13 which extend perpendicularly and under the lower bearing 1a.
  • the radiator could accommodate more than two flat electronic components and, in such a variant embodiment, the radiator would include as many bearings as there would be components, each bearing being associated with a heat dissipation surface.
  • the lower openings 10a are formed here of parallel slots opening, on the one hand, between the underlying fins 13 and on the other hand, on a part in projection 1d of the lower bearing 1a. These lower openings are provided on either side of the lower bearing 1a and its dissipation surface 11a, while also being present on the bottom of the groove 1c, as illustrated by the Figure 3 .
  • the slots forming the lower openings 10a are distributed between short slots and longer slots extending up to the bearing 1a of the card C1.
  • the upper openings 10b are here formed of grooves extending between the respective dissipation surfaces 11a, 11b of the lower bearing 1a and the upper bearing 1b.
  • the upper openings 10b open onto the interior edge of the upper landing 1b.
  • the lower bearing 1a is spaced from its dissipation surface 11a while the upper bearing 1b is coplanar with its dissipation surface 11b.
  • the lower bearing 1a is delimited by beveled notches 1c carried by the interior side wall of the radiator 1 and whose enlarged end ends above the dissipation surface 11a.
  • the C1 card is thus supported and wedged by the notches 1c. above its dissipation surface 11a.
  • the upper bearing 1b is, for its part, divided into two side plates framing the lower bearing 1a and separated by a groove 14 extending between the dissipation surface 1a and the exterior of the radiator 1.
  • the lower openings 10a are thus arranged around the first electronic card C1 (relative to the direction of convection) and the flow of hot air, escaping towards the outside through these openings, then comes, via the high openings 10b, near the second electronic card C2, as illustrated by the Figure 4A .

Description

L'invention s'applique au domaine du refroidissement des projecteurs de véhicules automobiles.The invention applies to the field of cooling motor vehicle headlights.

Plus précisément, l'invention concerne un radiateur destiné à assurer le refroidissement des modules optiques équipant les véhicules automobiles et dont la capacité de dissipation thermique est optimisée.More specifically, the invention relates to a radiator intended to ensure the cooling of optical modules fitted to motor vehicles and whose heat dissipation capacity is optimized.

Les systèmes d'éclairage de véhicules automobiles comprennent des modules optiques à composants électroniques qui ont tendance à s'échauffer, (lampes à LED, circuits imprimés, ...). Ces modules sont donc munis de moyens de refroidissement afin de garantir leur bon fonctionnement en présence de fortes sollicitations thermiques.Automotive vehicle lighting systems include optical modules with electronic components which tend to heat up (LED lamps, printed circuits, etc.). These modules are therefore equipped with cooling means to guarantee their proper functioning in the presence of strong thermal stresses.

De manière connue, ces moyens de refroidissement comprennent des radiateurs associés, si la dissipation thermique par convection s'avère insuffisante, à des moyens complémentaires, par exemple, des ventilateurs qui permettent de forcer le flux d'air en direction des composants électroniques.In known manner, these cooling means include radiators associated, if heat dissipation by convection proves insufficient, with complementary means, for example, fans which make it possible to force the air flow towards the electronic components.

De tels moyens de refroidissement sont décrits, notamment, dans la demande de brevet FR2997751A1 dans lequel un module d'éclairage de véhicule automobile à diode électroluminescente comprend un boîtier dans lequel sont logés un projecteur connecté et un radiateur pourvu d'au moins un canal de refroidissement partant d'une entrée d'air situé à l'avant du projecteur.Such cooling means are described, in particular, in the patent application FR2997751A1 in which a light-emitting diode motor vehicle lighting module comprises a housing in which are housed a connected headlight and a radiator provided with at least one cooling channel starting from an air inlet located at the front of the headlight .

Par ailleurs, la demande de brevet FR3033622 décrit un projecteur de véhicule automobile muni d'un radiateur formé d'une feuille métallique avec une pluralité de pliures, chacune formant une ailette de dissipation thermique.Furthermore, the patent application FR3033622 describes a motor vehicle headlight provided with a radiator formed of a metal sheet with a plurality of folds, each forming a heat dissipation fin.

On connaît par les documents KR20170117717 , EP3043107 , US2007/091632 , US2010/315830 , EP2730837 et CN102818235 des dispositifs d'éclairage comportant un dissipateur thermique.We know from the documents KR20170117717 , EP3043107 , US2007/091632 , US2010/315830 , EP2730837 And CN102818235 lighting devices comprising a heat sink.

Cependant, suivant la forme des modules optiques, de leur mode de fixation et de l'espace disponible dans leur environnement, il arrive parfois que les moyens de refroidissement par dissipation thermique et, en particulier, par convection au moyen d'un radiateur, ne soient pas disposés de façon optimale.However, depending on the shape of the optical modules, their method of fixing and the space available in their environment, it sometimes happens that the means of cooling by heat dissipation and, in particular, by convection by means of a radiator, do not are not optimally arranged.

Cela s'avère d'autant plus problématique lorsque plusieurs cartes électroniques sont supportées et fixées sur le radiateur qui doit alors dissiper la chaleur émise simultanément par toutes les cartes. En effet, les calories dégagées par l'une des cartes et diffusées par convection dans l'air ambiant se trouve confinées par les autres cartes ce qui peut conduire à une élévation critique de la température.This becomes all the more problematic when several electronic cards are supported and fixed on the radiator which must then dissipate the heat emitted simultaneously by all the cards. In fact, the calories released by one of the cards and diffused by convection into the ambient air are confined by the other cards, which can lead to a critical rise in temperature.

Dans ce cas et afin de protéger les circuits électroniques, il est généralement prévu une coupure automatique de l'alimentation électrique ou, tout au moins, une réduction de la puissance du module d'éclairage ce qui est préjudiciable à la sécurité du véhicule.In this case and in order to protect the electronic circuits, an automatic cut-off of the electrical supply is generally provided or, at least, a reduction in the power of the lighting module, which is detrimental to the safety of the vehicle.

Une autre option, parfois mise en oeuvre, consiste à utiliser un radiateur surdimensionné. Mais cela engendre des coûts de matières plus importants et conduit à augmenter l'encombrement et le poids du module d'éclairage et donc celui du véhicule ce qui va à l'encontre des tendances actuelles dans le secteur automobile.Another option, sometimes implemented, is to use an oversized radiator. But this generates higher material costs and leads to an increase in the size and weight of the lighting module and therefore that of the vehicle, which goes against current trends in the automotive sector.

Dans ce contexte, l'invention vise à apporter une solution technique permettant d'assurer un refroidissement efficace de l'ensemble des composants électroniques du projecteur en optimisant la capacité de convection du radiateur par une meilleure répartition de ses surfaces de dissipation de la chaleur.In this context, the invention aims to provide a technical solution making it possible to ensure effective cooling of all the electronic components of the projector by optimizing the convection capacity of the radiator by better distribution of its heat dissipation surfaces.

Ce but est atteint au moyen d'un radiateur à capacité de convection optimisée pour le refroidissement d'un projecteur de véhicule automobile tel que défini dans la revendication 1. Selon l'invention, le radiateur comprend au moins deux composants électroniques supportés et fixés, respectivement, sur un palier inférieur et un palier supérieur du radiateur, présentant chacun une surface de dissipation de la chaleur, caractérisé en ce que ledit radiateur comprend des ouvertures basses et des ouvertures hautes traversant lesdits paliers et débouchant sur chaque palier au niveau de sa surface de dissipation de la chaleur.This goal is achieved by means of a radiator with optimized convection capacity for cooling a motor vehicle headlight as defined in claim 1. According to the invention, the radiator comprises at least two electronic components supported and fixed, respectively, on a lower bearing and an upper bearing of the radiator, each having a heat dissipation surface, characterized in that said radiator comprises lower openings and upper openings passing through said bearings and opening onto each bearing at the level of its surface heat dissipation.

Selon l'invention, le radiateur comporte des ailettes latérales et des ailettes sous-jacentes s'étendant perpendiculairement et sous le palier inférieur.According to the invention, the radiator comprises lateral fins and underlying fins extending perpendicularly and under the lower bearing.

Dans un tel mode de réalisation, les ouvertures basses sont formées de fentes parallèles débouchant, d'une part, entre les ailettes sous-jacentes et d'autre part, sur une partie en saillie du palier inférieur.In such an embodiment, the lower openings are formed of parallel slots opening, on the one hand, between the underlying fins and on the other hand, on a projecting part of the lower bearing.

Selon une variante spécifique de réalisation, les ouvertures basses sont ménagées de part et d'autre du palier inférieur.According to a specific embodiment, the lower openings are provided on either side of the lower landing.

Les ouvertures hautes débouchent, quant à elles, sur le rebord intérieur du palier supérieur.The upper openings open onto the interior edge of the upper landing.

Selon une autre variante de réalisation, les ouvertures hautes sont formées de rainures s'étendant entre les surfaces de dissipation respectives du palier inférieur et du palier supérieur.According to another alternative embodiment, the upper openings are formed of grooves extending between the respective dissipation surfaces of the lower bearing and the upper bearing.

Selon l'invention, le palier inférieur est espacé de sa surface de dissipation en étant délimité par des crans biseautés. De préférence, le palier supérieur est coplanaire avec sa surface de dissipation.According to the invention, the lower bearing is spaced from its dissipation surface by being delimited by beveled notches. Preferably, the upper bearing is coplanar with its dissipation surface.

Selon encore une autre variante, le palier supérieur est divisé en deux plateaux latéraux encadrant le palier inférieur qui s'étend au-delà du rebord du palier supérieur.According to yet another variant, the upper bearing is divided into two side plates framing the lower bearing which extends beyond the edge of the upper bearing.

Un autre objet de l'invention est un projecteur de véhicule automobile équipé d'un radiateur de refroidissement à capacité de convection optimisée présentant les caractéristiques définies ci-dessus.Another object of the invention is a motor vehicle headlight equipped with a cooling radiator with optimized convection capacity having the characteristics defined above.

Le radiateur de l'invention assure un refroidissement performant et rapide des composants électroniques (et, en particulier, des cartes de circuits imprimés), fixés sur ses deux paliers grâce aux ouvertures qui permettent d'éviter la perturbation des flux d'air de transfert thermique.The radiator of the invention ensures efficient and rapid cooling of electronic components (and, in particular, printed circuit boards), fixed on its two bearings thanks to the openings which make it possible to avoid disturbance of the transfer air flows thermal.

Les calories dégagées par les composants électroniques sont évacuées soit par convection vers l'extérieur, soit par circulation d'air pulsé au travers du radiateur au moyen d'un ventilateur d'appoint.The calories released by the electronic components are evacuated either by convection to the outside, or by circulation of pulsed air through the radiator by means of an auxiliary fan.

La présence des ouvertures permet, en outre, d'alléger le radiateur tout en augmentant la surface totale de dissipation.The presence of the openings also makes it possible to lighten the radiator while increasing the total dissipation surface.

Le radiateur de l'invention offre aussi un gain économique en employant une quantité plus faible de matière embarquée.The radiator of the invention also offers an economic gain by using a lower quantity of on-board material.

Le radiateur de l'invention contribue ainsi à l'amélioration de la qualité en réduisant les risques de panne électronique et en simplifiant la protection des composants électroniques.The radiator of the invention thus contributes to improving quality by reducing the risk of electronic failure and by simplifying the protection of electronic components.

D'autres caractéristiques et avantages de l'invention ressortiront à la lecture de la description qui va suivre, en référence aux figures annexées et détaillées ci-après.

  • [Fig. 1] est une vue d'ensemble en perspective d'un projecteur de véhicule automobile pourvu d'un mode de réalisation du radiateur perfectionné de l'invention.
  • [Fig. 2A] est une vue en perspective éclatée du mode de réalisation du radiateur de la figure 1 avant assemblage des cartes électroniques.
  • [Fig. 2B] est une vue en perspective du mode de réalisation du radiateur de la figure 2A après assemblage des cartes électroniques.
  • [Fig. 3] est une vue de dessus du radiateur des figures 2A et 2B avant fixation des cartes électroniques.
  • [Fig. 4A] est une vue partielle en coupe d'un projecteur équipé du radiateur de l'invention.
  • [Fig. 4B] est une vue partielle en coupe d'un projecteur équipé du radiateur de l'invention et d'un ventilateur d'appoint.
Other characteristics and advantages of the invention will emerge on reading the description which follows, with reference to the appended figures detailed below.
  • [ Fig. 1 ] is an overall perspective view of a motor vehicle headlight provided with an embodiment of the improved radiator of the invention.
  • [ Fig. 2A ] is an exploded perspective view of the embodiment of the radiator of the figure 1 before assembling the electronic cards.
  • [ Fig. 2B ] is a perspective view of the embodiment of the radiator of the Figure 2A after assembly of the electronic cards.
  • [ Fig. 3 ] is a top view of the radiator of the Figures 2A and 2B before fixing the electronic cards.
  • [ Fig. 4A ] is a partial sectional view of a projector equipped with the radiator of the invention.
  • [ Fig. 4B ] is a partial sectional view of a projector equipped with the radiator of the invention and an auxiliary fan.

Pour plus de clarté, les éléments identiques ou similaires sont repérés par des signes de référence identiques sur l'ensemble des figures.For greater clarity, identical or similar elements are identified by identical reference signs throughout the figures.

Naturellement, les modes de réalisation du dispositif de l'invention illustrés par les figures présentées ci-dessus et décrites ci-après, ne sont donnés qu'à titre d'exemples non limitatifs. Il est explicitement prévu que l'on puisse proposer et combiner entre eux différents modes pour en proposer d'autres.Naturally, the embodiments of the device of the invention illustrated by the figures presented above and described below, are given only by way of non-limiting examples. It is explicitly planned that different modes can be proposed and combined to offer others.

L'invention concerne le domaine du refroidissement des projecteurs intégrés aux systèmes d'éclairage et de signalisation équipant les véhicules automobiles. Plus particulièrement, l'invention s'intéresse à l'optimisation de la capacité du radiateur à dissiper la chaleur produite par les cartes électroniques du module de projecteur.The invention relates to the field of cooling headlights integrated into lighting and signaling systems fitted to motor vehicles. More particularly, the invention concerns the optimization of the capacity of the radiator to dissipate the heat produced by the electronic cards of the projector module.

La figure 1 représente un projecteur P équipé d'un radiateur 1 destiné à refroidir au moins deux composants électroniques et ici deux cartes de circuits imprimés C1, C2 supportées et fixées, respectivement, sur un palier inférieur 1a et un palier supérieur 1b du radiateur 1.There figure 1 represents a projector P equipped with a radiator 1 intended to cool at least two electronic components and here two printed circuit boards C1, C2 supported and fixed, respectively, on a lower bearing 1a and an upper bearing 1b of the radiator 1.

A chaque palier 1a, 1b est associée une surface 11a, 11b de dissipation de la chaleur qui est dégagée par les cartes C1, C2, comme illustré par les figures 2A et 3. A cet effet, le radiateur 1 comporte, de manière traditionnelle, des ailettes latérales 12 et des ailettes sous-jacentes 13 qui s'étendent perpendiculairement et sous le palier inférieur 1a.Each level 1a, 1b is associated with a heat dissipation surface 11a, 11b which is released by the cards C1, C2, as illustrated by the figures 2A And 3 . For this purpose, the radiator 1 comprises, in a traditional manner, lateral fins 12 and underlying fins 13 which extend perpendicularly and under the lower bearing 1a.

Selon l'invention, il est prévu de réaliser dans le radiateur 1 des ouvertures hautes 10a et des ouvertures basses 10b traversant respectivement les paliers 1a, 1b et débouchant sur chaque palier au niveau de sa propre surface 11a, 11b de dissipation de la chaleur.According to the invention, it is planned to produce in the radiator 1 upper openings 10a and lower openings 10b respectively crossing the bearings 1a, 1b and opening onto each bearing at the level of its own heat dissipation surface 11a, 11b.

Bien entendu, il serait possible de prévoir, sans sortir du cadre de l'invention, que le radiateur puisse recevoir plus de deux composants électroniques plats et, dans une telle variante de réalisation, le radiateur comprendrait autant de paliers qu'il y aurait de composants, chaque palier étant associé à une surface de dissipation de la chaleur.Of course, it would be possible to provide, without departing from the scope of the invention, that the radiator could accommodate more than two flat electronic components and, in such a variant embodiment, the radiator would include as many bearings as there would be components, each bearing being associated with a heat dissipation surface.

Dans le mode de réalisation préférentiel de l'invention illustré par les figures annexées, les ouvertures basses 10a sont formées ici de fentes parallèles débouchant, d'une part, entre les ailettes sous-jacentes 13 et d'autre part, sur une partie en saillie 1d du palier inférieur 1a. Ces ouvertures basses sont ménagées de part et d'autre du palier inférieur 1a et de sa surface de dissipation 11a, en étant aussi présentes sur le fond de la gorge 1c, comme illustré par la figure 3.In the preferred embodiment of the invention illustrated by the appended figures, the lower openings 10a are formed here of parallel slots opening, on the one hand, between the underlying fins 13 and on the other hand, on a part in projection 1d of the lower bearing 1a. These lower openings are provided on either side of the lower bearing 1a and its dissipation surface 11a, while also being present on the bottom of the groove 1c, as illustrated by the Figure 3 .

Sur la partie en saillie 1d du radiateur, les fentes formant les ouvertures basses 10a se répartissent entre des fentes courtes et des fentes plus longues s'étendant jusqu'au palier 1a de la carte C1.On the projecting part 1d of the radiator, the slots forming the lower openings 10a are distributed between short slots and longer slots extending up to the bearing 1a of the card C1.

Toujours dans le mode de réalisation représenté sur les figures, les ouvertures hautes 10b sont ici formées de rainures s'étendant entre les surfaces de dissipation respectives 11a, 11b du palier inférieur 1a et du palier supérieur 1b. Les ouvertures hautes 10b débouchent sur le rebord intérieur du palier supérieur 1b.Still in the embodiment shown in the figures, the upper openings 10b are here formed of grooves extending between the respective dissipation surfaces 11a, 11b of the lower bearing 1a and the upper bearing 1b. The upper openings 10b open onto the interior edge of the upper landing 1b.

Le palier inférieur 1a est espacé de sa surface de dissipation 11a tandis que le palier supérieur 1b est coplanaire avec sa surface de dissipation 11b.The lower bearing 1a is spaced from its dissipation surface 11a while the upper bearing 1b is coplanar with its dissipation surface 11b.

Le palier inférieur 1a est délimité par des crans 1c biseautés portés par la paroi latérale intérieure du radiateur 1 et dont l'extrémité élargie se termine au-dessus de la surface de dissipation 11a. La carte C1 est ainsi supportée et calée par les crans 1c. au-dessus de sa surface de dissipation 11a.The lower bearing 1a is delimited by beveled notches 1c carried by the interior side wall of the radiator 1 and whose enlarged end ends above the dissipation surface 11a. The C1 card is thus supported and wedged by the notches 1c. above its dissipation surface 11a.

Le palier supérieur 1b est, quant à lui, divisé en deux plateaux latéraux encadrant le palier inférieur 1a et séparés par une gorge 14 s'étendant entre la surface de dissipation 1a et l'extérieur du radiateur 1.The upper bearing 1b is, for its part, divided into two side plates framing the lower bearing 1a and separated by a groove 14 extending between the dissipation surface 1a and the exterior of the radiator 1.

La surface de dissipation 11a et le palier inférieur 1a de support de la carte C1 situé immédiatement au-dessus, s'étendent au-delà du rebord du palier supérieur 1b sur la partie en saillie 1d sur laquelle débouchent aussi les ouvertures basses 10a, comme illustré par les figures 2B et 3.The dissipation surface 11a and the lower bearing 1a for supporting the card C1 located immediately above, extend beyond the edge of the upper bearing 1b on the projecting part 1d onto which the lower openings 10a also open, as illustrated by the figures 2B And 3 .

Les ouvertures basses 10a sont ainsi disposées autour de la première carte électronique C1 (relativement au sens de convection) et le flux d'air chaud, s'échappant vers l'extérieur au travers de ces ouvertures, vient ensuite, via les ouverture hautes 10b, à proximité de la seconde carte électronique C2, comme illustré par la figure 4A.The lower openings 10a are thus arranged around the first electronic card C1 (relative to the direction of convection) and the flow of hot air, escaping towards the outside through these openings, then comes, via the high openings 10b, near the second electronic card C2, as illustrated by the Figure 4A .

Dans le cas illustré par la figure 4B où le projecteur P est équipé, en outre, d'un ventilateur V pour obtenir un refroidissement plus poussé, ce dernier délivre un flux d'air pulsé qui s'engouffre dans le radiateur 1, d'abord vers le haut dans les ouvertures basses 10a pour pénétrer dans l'espace situé entre la surface de dissipation 11a et le palier 1a de la carte C1. Ce flux d'air chargé des calories dégagées par la carte C1se dirige ensuite, via les ouvertures hautes 10b, vers la surface de dissipation 11b de la carte C2 pour la ventiler et la refroidir.In the case illustrated by figure 4B where the projector P is equipped, in addition, with a fan V to obtain further cooling, the latter delivers a flow of pulsed air which rushes into the radiator 1, first upwards in the lower openings 10a to enter the space located between the dissipation surface 11a and the bearing 1a of the card C1. This air flow loaded with calories released by the C1 card then directs, via the upper openings 10b, towards the dissipation surface 11b of the C2 card to ventilate and cool it.

Claims (7)

  1. Radiator (1) with optimized convection capacity for cooling a headlight (P) of a motor vehicle comprising at least two electronic components (C1, C2) supported and fixed, respectively, on a lower bearing (1a) and a upper bearing (1b) of the radiator (1), each having a heat dissipation surface (11a, 11b), said radiator comprising lower openings (10a) and upper openings (10b) passing through said bearings (1a, 1b) and opening onto each bearing at the level of its heat dissipation surface (11a, 11b), said radiator comprising lateral fins (12) and underlying fins (13) extending perpendicularly and under the lower bearing (1a ), the lower openings (10a) being formed of parallel slots opening, on the one hand, between the underlying fins (13) and on the other hand, on a projecting part (1d) of the lower bearing (1a), characterized in that the lower bearing (1a) is spaced from its dissipation surface (11a) and is delimited by beveled notches (1c) carried by the interior side wall of the radiator and whose enlarged end ends above the dissipation surface (11a) in order to support and wedge one of the two electronic components (C1) above the dissipation surface (11a).
  2. Radiator according to one of the preceding claims, characterized in that the lower openings (10a) are provided on either side of the lower bearing (1a).
  3. Radiator according to one of the preceding claims, characterized in that the upper openings (10b) open onto the inner rim of the upper bearing (1b).
  4. Radiator according to one of the preceding claims, characterized in that the upper openings (10b) are formed of grooves extending between the respective dissipation surfaces (11a, 11b) of the lower bearing (1a) and the upper bearing ( 1b).
  5. Radiator according to one of the preceding claims, characterized in that the upper bearing (1b) is coplanar with its dissipation surface (11b).
  6. Radiator according to the preceding claim, characterized in that the upper bearing (1b) is divided into two side plates framing said lower bearing (1a) which extends beyond the edge of the upper bearing.
  7. Headlight (P) of a motor vehicle equipped with a cooling radiator (1) with optimized convection capacity according to one of the preceding claims.
EP20775369.0A 2019-09-05 2020-08-17 Radiator with optimised cooling capacity for motor vehicle headlamp Active EP4025828B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1909755A FR3100600A1 (en) 2019-09-05 2019-09-05 Radiator with optimized cooling capacity for automotive vehicle headlight
PCT/FR2020/051473 WO2021044090A1 (en) 2019-09-05 2020-08-17 Radiator with optimised cooling capacity for motor vehicle headlamp

Publications (2)

Publication Number Publication Date
EP4025828A1 EP4025828A1 (en) 2022-07-13
EP4025828B1 true EP4025828B1 (en) 2024-01-17

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EP (1) EP4025828B1 (en)
CN (1) CN114341548A (en)
FR (1) FR3100600A1 (en)
WO (1) WO2021044090A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7329033B2 (en) * 2005-10-25 2008-02-12 Visteon Global Technologies, Inc. Convectively cooled headlamp assembly
TW201043500A (en) * 2009-06-10 2010-12-16 Man Zai Ind Co Ltd Heat dissipation device of car lamp and spacer thereof
CN102818235A (en) * 2011-06-10 2012-12-12 王勤文 Radiator and light-emitting diode (LED) lighting device with radiator
FR2997751A1 (en) 2012-11-08 2014-05-09 Peugeot Citroen Automobiles Sa Front headlight i.e. LED headlight, for motor vehicle, has cooling channel extended from air intake located in front of headlight between dipped and main beam headlamps to respective rear radiators of dipped and main beam headlamps
FR2998034A1 (en) * 2012-11-09 2014-05-16 Valeo Vision LIGHTING MODULE WITH UNIT CARD AND DISTINCTIVE DISSIPATORS
CN203464214U (en) * 2013-08-30 2014-03-05 安徽湛蓝光电科技有限公司 Radiator applied to LED (Light-Emitting Diode) automotive headlamp
FR3015003B1 (en) * 2013-12-13 2016-01-01 Peugeot Citroen Automobiles Sa MOTOR VEHICLE PROJECTOR WITHOUT ICE
FR3018013B1 (en) * 2014-02-26 2018-01-12 Valeo Equipements Electriques Moteur ELECTRONIC ASSEMBLY FOR ROTATING ELECTRIC MACHINE FOR MOTOR VEHICLE
FR3031571B1 (en) * 2015-01-09 2018-08-10 Valeo Vision OPTICAL MODULE FOR VEHICLE PROJECTOR
FR3033622B1 (en) 2015-03-13 2018-04-27 Valeo Iluminacion OPTICAL MODULE FOR MOTOR VEHICLE PROJECTOR
ITUB20155584A1 (en) * 2015-11-13 2017-05-13 Piaggio & C Spa Engine cooling system of a motor vehicle
KR101791607B1 (en) * 2016-04-14 2017-10-30 순천대학교 산학협력단 Headlamp for vehicles
FR3064049B1 (en) * 2017-03-16 2021-07-09 Valeo Vision OPTICAL MODULE INCLUDING A RADIATOR EQUIPPED WITH A VENT

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WO2021044090A1 (en) 2021-03-11
CN114341548A (en) 2022-04-12
EP4025828A1 (en) 2022-07-13
FR3100600A1 (en) 2021-03-12

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