WO2021044090A1 - 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
WO2021044090A1
WO2021044090A1 PCT/FR2020/051473 FR2020051473W WO2021044090A1 WO 2021044090 A1 WO2021044090 A1 WO 2021044090A1 FR 2020051473 W FR2020051473 W FR 2020051473W WO 2021044090 A1 WO2021044090 A1 WO 2021044090A1
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WO
WIPO (PCT)
Prior art keywords
radiator
bearing
openings
lower bearing
radiator according
Prior art date
Application number
PCT/FR2020/051473
Other languages
French (fr)
Inventor
Filipe Videira
Bruno DESSI
Original Assignee
Psa Automobiles Sa
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Psa Automobiles Sa filed Critical Psa Automobiles Sa
Priority to EP20775369.0A priority Critical patent/EP4025828B1/en
Priority to CN202080062156.6A priority patent/CN114341548A/en
Publication of WO2021044090A1 publication Critical patent/WO2021044090A1/en

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Classifications

    • 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

  • TITLE Radiator with optimized cooling capacity for automotive vehicle headlight
  • 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 the heat dissipation capacity of which 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 provided with cooling means in order to guarantee their correct operation in the presence of strong thermal stresses.
  • these cooling means comprise associated radiators, if the heat dissipation by convection proves to be insufficient, with additional means, for example, fans which make it possible to force the air flow towards the components electronic.
  • 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 a cooling channel from an air inlet located at the front of the projector.
  • patent application FR3033622 describes a motor vehicle headlight provided with a radiator formed from a metal sheet with a plurality of folds, each forming a heat dissipation fin.
  • an automatic cut-off of the power supply is generally provided or, at least, a reduction in the power of the lighting module, which is prejudicial to the safety of the vehicle.
  • the invention aims to provide a technical solution to ensure effective cooling of all the electronic components of the projector by optimizing the convection capacity of the radiator by a better distribution of its dissipation surfaces of the heat.
  • This object is achieved by means of a radiator with optimized convection capacity for cooling a motor vehicle headlight comprising at least two electronic components supported and fixed, respectively, on a lower bearing and an upper bearing of the radiator , each having a heat dissipating surface, characterized in that said radiator comprises low openings and high openings passing through said bearings and opening onto each bearing at its heat dissipation surface.
  • the radiator comprises lateral fins and underlying fins extending perpendicularly and under the lower bearing.
  • the bottom openings are formed of parallel slots opening out, on the one hand, between the underlying fins and on the other hand, on a projecting part of the lower bearing.
  • the bottom openings are provided on either side of the lower landing.
  • the upper openings open out, for their part, on the inner rim of the upper bearing.
  • the upper openings are formed of grooves extending between the respective dissipation surfaces of the lower bearing and of the upper bearing.
  • the lower bearing is spaced from its dissipation surface by being delimited by bevelled notches while the upper bearing is coplanar with its dissipation surface.
  • the upper bearing is divided into two side plates flanking the lower bearing which extends beyond the rim 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 provides efficient and rapid cooling of the electronic components (and, in particular, of the printed circuit boards), fixed on its two bearings thanks to the openings which make it possible to avoid the disturbance of the flow of heat transfer air.
  • 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 smaller amount of on-board material. [0025] The radiator of the invention thus contributes to improving the quality by reducing the risks of electronic failure and by simplifying the protection of electronic components.
  • FIG. 1 is a perspective overview 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 FIG. 1 before assembly of the electronic boards.
  • FIG. 2B is a perspective view of the embodiment of the radiator of FIG. 2A after assembly of the electronic boards.
  • FIG. 3 is a top view of the heat sink of FIGS. 2A and 2B before fixing the electronic boards.
  • 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 inventive radiator and an auxiliary fan.
  • the invention relates to the field of cooling headlights integrated into lighting and signaling systems fitted to motor vehicles. More particularly, the invention is concerned with optimizing the ability of the radiator to dissipate the heat produced by the electronic boards of the projector module.
  • FIG. 1 shows 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 la and an upper bearing lb radiator 1.
  • the radiator 1 comprises, of traditionally, side fins 12 and underlying fins 13 which extend perpendicularly and under the lower bearing 1a.
  • the radiator can receive more than two flat electronic components and, in such an alternative embodiment, the radiator would include as many bearings as it there would be components, each bearing being associated with a heat dissipation surface.
  • the lower openings 10a are here formed by parallel slots opening out, on the one hand, between the underlying fins 13 and on the other hand, on a projecting portion ld of the lower bearing la. These low openings are provided on both sides on the other side of the lower bearing 1a and of its dissipation surface 11a, also being present on the bottom of the groove 1c, as illustrated in FIG. 3.
  • the slots forming the bottom openings 10a are distributed between short slots and longer slots extending to the landing 1a of the card C1.
  • the top openings 10b are here formed of grooves extending between the respective dissipation surfaces 11a, 11b of the lower bearing la and of the upper bearing lb.
  • the top openings 10b open onto the inner rim of the upper bearing lb.
  • the lower bearing la is spaced from its dissipation surface 11a while the upper bearing lb is coplanar with its dissipation surface 11b.
  • the lower bearing la is delimited by the bevelled notches carried by the inner side wall of the radiator 1 and the widened end of which ends above the dissipation surface 11a.
  • the card C1 is thus supported and wedged by the notches le. above its dissipation surface 11a.
  • the upper bearing lb is, in turn, divided into two side plates flanking the lower bearing 1a and separated by a groove 14 extending between the dissipation surface 1a and the outside of the radiator 1.
  • the lower openings 10a are thus arranged around the first electronic card Cl (relative to the direction of convection) and the flow of hot air, escaping to the outside through these openings, then comes, via the top opening 10b, near the second electronic card C2, as illustrated in FIG. 4A.
  • the latter delivers a pulsed air flow 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.
  • the air charged with the calories released by the card Clse then directs, via the top openings 10b, to the dissipation surface 11b of the card C2 to ventilate and cool it.

Abstract

The invention concerns a radiator (1) with optimised convection capacity for cooling a motor vehicle headlamp comprising at least two electronic components (C1, C2) supported and fastened, respectively, to a lower stage (1a) and an upper stage (1b) of the radiator (1), each having a heat-dissipation surface (11a, 11b), characterised in that the radiator comprises bottom openings (10a) and top openings (10b) passing through the stages (1a, 1b) and opening on each stage at the heat-dissipation surface (11a, 11b) of same, and a headlamp equipped with the radiator.

Description

DESCRIPTION DESCRIPTION
TITRE : Radiateur à capacité de refroidissement optimisée pour projecteur de véhicule automobile TITLE: Radiator with optimized cooling capacity for automotive vehicle headlight
[0001] L’invention s’applique au domaine du refroidissement des projecteurs de véhicules automobiles. The invention applies to the field of cooling motor vehicle headlights.
[0002] 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. [0002] More specifically, the invention relates to a radiator intended to ensure the cooling of optical modules fitted to motor vehicles and the heat dissipation capacity of which is optimized.
[0003] 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. [0003] Automotive vehicle lighting systems include optical modules with electronic components which tend to heat up (LED lamps, printed circuits, etc.). These modules are therefore provided with cooling means in order to guarantee their correct operation in the presence of strong thermal stresses.
[0004] 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 comprise associated radiators, if the heat dissipation by convection proves to be insufficient, with additional means, for example, fans which make it possible to force the air flow towards the components electronic.
[0005] 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. [0005] Such cooling means are described, in particular, in 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 a cooling channel from an air inlet located at the front of the projector.
[0006] 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. [0006] Furthermore, patent application FR3033622 describes a motor vehicle headlight provided with a radiator formed from a metal sheet with a plurality of folds, each forming a heat dissipation fin.
[0007] 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. [0007] However, depending on the shape of the optical modules, their method of attachment 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, are not optimally arranged.
[0008] 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. [0008] 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. Indeed, the calories released by one of the cards and diffused by convection in the ambient air are confined by the other cards, which can lead to a critical rise in temperature.
[0009] 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 power supply is generally provided or, at least, a reduction in the power of the lighting module, which is prejudicial to the safety of the vehicle.
[0010] Une autre option, parfois mise en œuvre, 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.
[0011] 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. [0012] Ce but est atteint au moyen d’un radiateur à capacité de convection optimisée pour le refroidissement d’un projecteur de véhicule automobile comprenant 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. In this context, the invention aims to provide a technical solution to ensure effective cooling of all the electronic components of the projector by optimizing the convection capacity of the radiator by a better distribution of its dissipation surfaces of the heat. This object is achieved by means of a radiator with optimized convection capacity for cooling a motor vehicle headlight comprising at least two electronic components supported and fixed, respectively, on a lower bearing and an upper bearing of the radiator , each having a heat dissipating surface, characterized in that said radiator comprises low openings and high openings passing through said bearings and opening onto each bearing at its heat dissipation surface.
[0013] Selon un mode de réalisation préférentiel, le radiateur comporte des ailettes latérales et des ailettes sous-jacentes s’étendant perpendiculairement et sous le palier inférieur. [0014] 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. [0013] According to a preferred embodiment, the radiator comprises lateral fins and underlying fins extending perpendicularly and under the lower bearing. In such an embodiment, the bottom openings are formed of parallel slots opening out, on the one hand, between the underlying fins and on the other hand, on a projecting part of the lower bearing.
[0015] Selon une variante spécifique de réalisation, les ouvertures basses sont ménagées de part et d’autre du palier inférieur. [0015] According to a specific variant embodiment, the bottom openings are provided on either side of the lower landing.
[0016] Les ouvertures hautes débouchent, quant à elles, sur le rebord intérieur du palier supérieur. The upper openings open out, for their part, on the inner rim of the upper bearing.
[0017] 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. [0017] According to another variant embodiment, the upper openings are formed of grooves extending between the respective dissipation surfaces of the lower bearing and of the upper bearing.
[0018] De préférence, le palier inférieur est espacé de sa surface de dissipation en étant délimité par des crans biseautés tandis que le palier supérieur est coplanaire avec sa surface de dissipation. Preferably, the lower bearing is spaced from its dissipation surface by being delimited by bevelled notches while the upper bearing is coplanar with its dissipation surface.
[0019] 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. [0019] According to yet another variant, the upper bearing is divided into two side plates flanking the lower bearing which extends beyond the rim of the upper bearing.
[0020] 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. [0021] 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. 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 provides efficient and rapid cooling of the electronic components (and, in particular, of the printed circuit boards), fixed on its two bearings thanks to the openings which make it possible to avoid the disturbance of the flow of heat transfer air.
[0022] 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. [0023] La présence des ouvertures permet, en outre, d’alléger le radiateur tout en augmentant la surface totale de dissipation. 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.
[0024] Le radiateur de l’invention offre aussi un gain économique en employant une quantité plus faible de matière embarquée. [0025] 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. [0024] The radiator of the invention also offers an economic gain by using a smaller amount of on-board material. [0025] The radiator of the invention thus contributes to improving the quality by reducing the risks of electronic failure and by simplifying the protection of electronic components.
[0026] 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. [0026] Other characteristics and advantages of the invention will become apparent on reading the description which follows, with reference to the appended and detailed figures below.
[0027] [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. [0027] [Fig. 1] is a perspective overview of a motor vehicle headlight provided with an embodiment of the improved radiator of the invention.
[0028] [Fig. 2A] est une vue en perspective éclatée du mode de réalisation du radiateur de la figure 1 avant assemblage des cartes électroniques. [0029] [Fig. 2B] est une vue en perspective du mode de réalisation du radiateur de la figure 2A après assemblage des cartes électroniques. [0028] [Fig. 2A] is an exploded perspective view of the embodiment of the radiator of FIG. 1 before assembly of the electronic boards. [0029] [Fig. 2B] is a perspective view of the embodiment of the radiator of FIG. 2A after assembly of the electronic boards.
[0030] [Fig. 3] est une vue de dessus du radiateur des figures 2A et 2B avant fixation des cartes électroniques. [0030] [Fig. 3] is a top view of the heat sink of FIGS. 2A and 2B before fixing the electronic boards.
[0031] [Fig. 4A] est une vue partielle en coupe d’un projecteur équipé du radiateur de l’invention. [0031] [Fig. 4A] is a partial sectional view of a projector equipped with the radiator of the invention.
[0032] [Fig. 4B] est une vue partielle en coupe d’un projecteur équipé du radiateur de l’invention et d’un ventilateur d’appoint. [0032] [Fig. 4B] is a partial sectional view of a projector equipped with the inventive radiator and an auxiliary fan.
[0033] Pour plus de clarté, les éléments identiques ou similaires sont repérés par des signes de référence identiques sur l’ensemble des figures. [0034] 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. For greater clarity, identical or similar elements are identified by identical reference signs in all of the figures. Of course, the embodiments of the device of the invention illustrated by the figures presented above and described below, are given only as non-limiting examples. It is explicitly provided that we can offer and combine different modes to offer others.
[0035] 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 is concerned with optimizing the ability of the radiator to dissipate the heat produced by the electronic boards of the projector module.
[0036] 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 Cl, C2 supportées et fixées, respectivement, sur un palier inférieur la et un palier supérieur lb du radiateur 1. Figure 1 shows 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 la and an upper bearing lb radiator 1.
[0037] A chaque palier la, lb est associée une surface lia, 11b de dissipation de la chaleur qui est dégagée par les cartes Cl, 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 la. With each bearing la, lb is associated a surface 11a, 11b of heat dissipation which is released by the cards C1, C2, as illustrated by Figures 2A and 3. For this purpose, the radiator 1 comprises, of traditionally, side fins 12 and underlying fins 13 which extend perpendicularly and under the lower bearing 1a.
[0038] 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 la, lb et débouchant sur chaque palier au niveau de sa propre surface lia, 11b de dissipation de la chaleur. According to the invention, provision is made in the radiator 1 of the upper openings 10a and the lower openings 10b respectively passing through the bearings la, lb and opening onto each bearing at its own surface 11a, 11b of dissipation of the heat.
[0039] 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 can receive more than two flat electronic components and, in such an alternative embodiment, the radiator would include as many bearings as it there would be components, each bearing being associated with a heat dissipation surface.
[0040] 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 ld du palier inférieur la. Ces ouvertures basses sont ménagées de part et d’autre du palier inférieur la et de sa surface de dissipation lia, en étant aussi présentes sur le fond de la gorge le, comme illustré par la figure 3. In the preferred embodiment of the invention illustrated by the accompanying figures, the lower openings 10a are here formed by parallel slots opening out, on the one hand, between the underlying fins 13 and on the other hand, on a projecting portion ld of the lower bearing la. These low openings are provided on both sides on the other side of the lower bearing 1a and of its dissipation surface 11a, also being present on the bottom of the groove 1c, as illustrated in FIG. 3.
[0041] Sur la partie en saillie ld 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 la de la carte Cl. On the protruding part 1d of the radiator, the slots forming the bottom openings 10a are distributed between short slots and longer slots extending to the landing 1a of the card C1.
[0042] 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 lia, 11b du palier inférieur la et du palier supérieur lb. Les ouvertures hautes 10b débouchent sur le rebord intérieur du palier supérieur lb. [0043] Le palier inférieur la est espacé de sa surface de dissipation lia tandis que le palier supérieur lb est coplanaire avec sa surface de dissipation 11b. Still in the embodiment shown in the figures, the top openings 10b are here formed of grooves extending between the respective dissipation surfaces 11a, 11b of the lower bearing la and of the upper bearing lb. The top openings 10b open onto the inner rim of the upper bearing lb. The lower bearing la is spaced from its dissipation surface 11a while the upper bearing lb is coplanar with its dissipation surface 11b.
[0044] Le palier inférieur la est délimité par des crans le biseautés portés par la paroi latérale intérieure du radiateur 1 et dont l’extrémité élargie se termine au-dessus de la surface de dissipation lia. La carte Cl est ainsi supportée et calée par les crans le. au-dessus de sa surface de dissipation lia. The lower bearing la is delimited by the bevelled notches carried by the inner side wall of the radiator 1 and the widened end of which ends above the dissipation surface 11a. The card C1 is thus supported and wedged by the notches le. above its dissipation surface 11a.
[0045] Le palier supérieur lb est, quant à lui, divisé en deux plateaux latéraux encadrant le palier inférieur la et séparés par une gorge 14 s’étendant entre la surface de dissipation la et l’extérieur du radiateur 1. The upper bearing lb is, in turn, divided into two side plates flanking the lower bearing 1a and separated by a groove 14 extending between the dissipation surface 1a and the outside of the radiator 1.
[0046] La surface de dissipation lia et le palier inférieur la de support de la carte Cl situé immédiatement au-dessus, s’étendent au-delà du rebord du palier supérieur lb sur la partie en saillie ld sur laquelle débouchent aussi les ouvertures basses 10a, comme illustré par les figures 2B et 3. The dissipation surface 11a and the lower bearing the support of the card C1 located immediately above, extend beyond the rim of the upper bearing lb on the projecting part ld onto which also open the lower openings 10a, as illustrated by Figures 2B and 3.
[0047] Les ouvertures basses 10a sont ainsi disposées autour de la première carte électronique Cl (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 Cl (relative to the direction of convection) and the flow of hot air, escaping to the outside through these openings, then comes, via the top opening 10b, near the second electronic card C2, as illustrated in FIG. 4A.
[0048] 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 lia et le palier la de la carte Cl. Ce flux d’air chargé des calories dégagées par la carte Clse 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 FIG. 4B where the projector P is further equipped with a fan V to obtain further cooling, the latter delivers a pulsed air flow 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. The air charged with the calories released by the card Clse then directs, via the top openings 10b, to the dissipation surface 11b of the card C2 to ventilate and cool it.

Claims

REVENDICATIONS
1 . Radiateur (1) à capacité de convection optimisée pour le refroidissement d’un projecteur (P) de véhicule automobile comprenant au moins deux composants électroniques (Cl, C2) supportés et fixés, respectivement, sur un palier inférieur1. Radiator (1) with optimized convection capacity for cooling a motor vehicle headlight (P) comprising at least two electronic components (Cl, C2) supported and fixed, respectively, on a lower bearing
(la) et un palier supérieur (lb) du radiateur (1), présentant chacun une surface de dissipation (lia, 11b) de la chaleur, caractérisé en ce que ledit radiateur comprend des ouvertures basses (10a) et des ouvertures hautes (10b) traversant lesdits paliers (la, lb) et débouchant sur chaque palier au niveau de sa surface (lia, 11b) de dissipation de la chaleur. (la) and an upper bearing (lb) of the radiator (1), each having a heat dissipating surface (11a, 11b), characterized in that said radiator comprises bottom openings (10a) and top openings (10b) ) passing through said bearings (la, lb) and opening onto each bearing at the level of its heat dissipation surface (11a, 11b).
2. Radiateur selon la revendication 1, caractérisé en ce qu’il comporte des ailettes latérales (12) et des ailettes sous-jacentes (13) s’étendant perpendiculairement et sous le palier inférieur (la). 2. Radiator according to claim 1, characterized in that it comprises lateral fins (12) and underlying fins (13) extending perpendicularly and under the lower bearing (la).
3. Radiateur selon la revendication précédente, caractérisé en ce que les ouvertures basses (10a) sont formées de fentes parallèles débouchant, d’une part, entre les ailettes sous-jacentes (13) et d’autre part, sur une partie en saillie (ld) du palier inférieur (la). 3. Radiator according to the preceding claim, characterized in that the bottom openings (10a) are formed of parallel slots opening, on the one hand, between the underlying fins (13) and on the other hand, on a projecting part (ld) of the lower bearing (la).
4. Radiateur selon l’une des revendications précédentes, caractérisé en ce que les ouvertures basses (10a) sont ménagées de part et d’autre du palier inférieur (la). 4. Radiator according to one of the preceding claims, characterized in that the lower openings (10a) are provided on either side of the lower bearing (la).
5. Radiateur selon l’une des revendications précédentes, caractérisé en ce que les ouvertures hautes (10b) débouchent sur le rebord intérieur du palier supérieur5. Radiator according to one of the preceding claims, characterized in that the upper openings (10b) open onto the inner rim of the upper bearing
(lb). (lb).
6. Radiateur selon l’une des revendications précédentes, caractérisé en ce que les ouvertures hautes (10b) sont formées de rainures s’étendant entre les surfaces de dissipation respectives (lia, 11b) du palier inférieur (la) et du palier supérieur (lb). 6. 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 (la) and of the upper bearing ( lb).
7. Radiateur selon l’une des revendications précédentes, caractérisé en ce que le palier inférieur (la) est espacé de sa surface de dissipation (lia) et est délimité par des crans biseautés (le). 7. Radiator according to one of the preceding claims, characterized in that the lower bearing (la) is spaced from its dissipation surface (11a) and is delimited by bevelled notches (le).
8. Radiateur selon l’une des revendications précédentes, caractérisé en ce que le palier supérieur (lb) est coplanaire avec sa surface de dissipation (11b). 8. Radiator according to one of the preceding claims, characterized in that the upper bearing (lb) is coplanar with its dissipation surface (11b).
9. Radiateur selon la revendication précédente, caractérisé en ce que le palier supérieur (lb) est divisé en deux plateaux latéraux encadrant ledit palier inférieur (la) qui s’étend au-delà du rebord du palier supérieur. 9. Radiator according to the preceding claim, characterized in that the upper bearing (lb) is divided into two side plates flanking said lower bearing (la) which extends beyond the rim of the upper bearing.
10. Projecteur (P) de véhicule automobile équipé d’un radiateur (1) de refroidissement à capacité de convection optimisée selon l’une des revendications précédentes. 10. Headlight (P) of a motor vehicle equipped with a cooling radiator (1) with optimized convection capacity according to one of the preceding claims.
PCT/FR2020/051473 2019-09-05 2020-08-17 Radiator with optimised cooling capacity for motor vehicle headlamp WO2021044090A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20775369.0A EP4025828B1 (en) 2019-09-05 2020-08-17 Radiator with optimised cooling capacity for motor vehicle headlamp
CN202080062156.6A CN114341548A (en) 2019-09-05 2020-08-17 Heat sink for a motor vehicle headlight with optimized cooling capacity

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
FRFR1909755 2019-09-05

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WO2021044090A1 true WO2021044090A1 (en) 2021-03-11

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CN (1) CN114341548A (en)
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EP2730837A1 (en) * 2012-11-09 2014-05-14 Valeo Vision Lighting module with separate heat sinks mounted on a common printed circuit board
EP3043107A1 (en) * 2015-01-09 2016-07-13 Valeo Vision Optical module for motor vehicle headlight
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FR3015003B1 (en) * 2013-12-13 2016-01-01 Peugeot Citroen Automobiles Sa MOTOR VEHICLE PROJECTOR WITHOUT ICE
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US20070091632A1 (en) * 2005-10-25 2007-04-26 Visteon Global Technologies, Inc. Convectively cooled headlamp assembly
US20100315830A1 (en) * 2009-06-10 2010-12-16 Man Zai Industrial Co., Ltd. Heat dissipation device of vehicle lamp and interposing element 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
EP2730837A1 (en) * 2012-11-09 2014-05-14 Valeo Vision Lighting module with separate heat sinks mounted on a common printed circuit board
EP3043107A1 (en) * 2015-01-09 2016-07-13 Valeo Vision Optical module for motor vehicle headlight
FR3033622A1 (en) 2015-03-13 2016-09-16 Valeo Iluminacion Sa OPTICAL MODULE FOR MOTOR VEHICLE PROJECTOR
KR20170117717A (en) * 2016-04-14 2017-10-24 순천대학교 산학협력단 Headlamp for vehicles

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CN114341548A (en) 2022-04-12
EP4025828A1 (en) 2022-07-13
EP4025828B1 (en) 2024-01-17
FR3100600A1 (en) 2021-03-12

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