EP3153770B1 - Cooling air duct for motor vehicle headlight - Google Patents

Cooling air duct for motor vehicle headlight Download PDF

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Publication number
EP3153770B1
EP3153770B1 EP16190426.3A EP16190426A EP3153770B1 EP 3153770 B1 EP3153770 B1 EP 3153770B1 EP 16190426 A EP16190426 A EP 16190426A EP 3153770 B1 EP3153770 B1 EP 3153770B1
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EP
European Patent Office
Prior art keywords
walls
headlamp
duct
hollow parts
wall
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EP16190426.3A
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German (de)
French (fr)
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EP3153770A1 (en
Inventor
Lotfi REDJEM SAAD
François BERREZAI
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Valeo Vision SAS
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Valeo Vision SAS
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Publication of EP3153770A1 publication Critical patent/EP3153770A1/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
    • F21S45/42—Forced cooling
    • F21S45/43—Forced cooling using gas
    • 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
    • F21S45/49—Attachment of the cooling means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
    • F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles

Definitions

  • the invention relates to the field of lighting and/or light signaling, in particular for motor vehicles. More particularly, the invention relates to the cooling of light modules of a motor vehicle headlamp.
  • the light sources present in projectors and lighting devices are subject to overheating and often require cooling. This is particularly the case for semi-conductor light sources, such as light-emitting diodes or even laser diodes. These light sources are in fact of very small size for a high lighting power. They are usually arranged on a plate of the printed circuit type and are often thermally coupled to one or more radiators.
  • the published patent document DE 10 2007 043 961 A1 discloses a projector comprising several light modules whose light sources of the semiconductor type are coupled to radiators. These are cooled by a forced air current through a duct.
  • the latter comprises a cooling air inlet set in motion by a fan, several outlets opening out near the coolers and a passage connecting the inlet to the outlets.
  • the passage includes branches dividing the air flow from the inlet into several flows to the different outlets.
  • the construction of the duct is conventional in that it is the ramifications of the duct which carry out the distribution of the inlet air flow.
  • the number of possible outputs is however limited by the ramifications and, moreover, the distribution of the specific bit rates of the various outputs lacks control. Indeed, an unidentified pressure drop downstream in one of the ramifications can have a significant negative influence on the flow distribution.
  • the realization of the ramifications is not without posing certain problems of size and cost of realization.
  • the patent document FR 2 946 730 A1 discloses, similarly to the previous document, a headlamp for a motor vehicle, comprising several modules whose light sources are cooled by a flow of cooling air circulating through a duct arranged between a fan and respective radiators of the light sources. Similar to the conduit of teaching above, the duct is made to have a bulky and complex shape from a production cost point of view. The distribution of the flow rates has the same drawbacks there as in the previous teaching.
  • the patent document US 2011/0051453 A1 discloses a headlamp for a motor vehicle, comprising several light modules whose light sources are in thermal contact with a common radiator.
  • a fan is arranged in a low position and at a distance from the radiator in order to allow the pivoting of the light sources and of the radiator in relation to a directional lighting function.
  • the object of the invention is to propose a solution to the problem of cooling light modules of a projector or light device. More particularly, the object of the invention is to allow efficient distribution of a flow of cooling air produced by one or more radiators.
  • the subject of the invention is a headlamp for a motor vehicle, as defined in claim 1, comprising: several light modules; an air duct for cooling the light modules, with at least one inlet for an air flow from one or more fans, several air outlets towards the light modules, and a passage connecting the inlet(s) with the exits ; remarkable in that the duct comprises at least one added wall separating the passage.
  • added wall is meant a separate wall of the body of the duct, the wall then being fixed to said body.
  • the body advantageously forms the outer walls of the duct.
  • the passage advantageously forms several fluid veins, such as for example at least four fluid veins.
  • Each fluid stream is advantageously associated with one or more outlets.
  • the conduit is advantageously made of plastic material, in particular thermoplastic.
  • the or at least one of the added walls is adjacent to the inlet or at least one of the inlets.
  • the duct generally extends in a plane, the or at least one of the added walls being parallel to said plane or forming an angle of less than 15°, preferably less than 10°, with said plan.
  • the or at least one of the added walls is configured to divide the air flow, preferably at the inlet of said duct, into at least two separate veins towards the different outlets.
  • the added wall or walls cooperate with one or more fixed partition walls so as to divide the air flow, preferably at the inlet of said duct, into at least four separate veins towards the different exits.
  • the fixed partition(s) are transverse, preferably perpendicular, to the added wall(s).
  • the duct comprises at least two hollow parts assembled together, the or at least one of the added walls being placed between said hollow parts.
  • the added wall or walls are thus sandwiched between the at least two hollow parts.
  • the at least two hollow parts delimit in a complementary manner the passage between the inlet or inlets and the outlets, along one or more cross sections of said passage.
  • the at least two hollow parts form at least one hinge connecting them and making it possible to bring them together with a view to assembling them, said hinge being preferentially integral with said hollow parts.
  • the at least two hollow parts are assembled in generally planar mutual contact, the or at least one of the added walls extending parallel to said plane or forming with said plane an angle of less than 15° , preferably less than 10°.
  • the at least two hollow parts delimit the inlet or at least one of the inlets, along a cross section of said inlet or inlets.
  • each of the outlets is integrally formed on one of the at least two hollow parts.
  • At least one, preferably each, of the outlets forms a channel extending transversely to the duct.
  • the channel formed by the outlet or outlets has a section with a convergent profile.
  • each of the at least two hollow parts comprises a bottom wall, the or each of the fixed partition walls extending over one of said bottom walls.
  • each of the at least two hollow parts comprises side walls, the or each of the fixed separating walls being in contact with at least one of the side walls.
  • the fixed partition walls comprise at least one partition wall transverse to the duct, with an edge adjacent to an edge of the or one of the added walls, said partition wall(s) preferably being generally straight.
  • the fixed partition walls comprise at least one guide wall extending along the duct, said guide wall(s) preferably being curved.
  • the partitioning wall or walls are on one of the at least two hollow parts of the conduit and the or at least one of the guide walls is on another of said at least two hollow parts.
  • the measures of the invention are advantageous in that they make it possible to produce a conduit forming several streams towards different outlets, which is efficient and economical.
  • the duct performs well in that the fact of providing at least one separating wall which is attached makes it possible to separate the fluid streams in an optimal manner.
  • the duct is economical to produce in that all of its fixed walls can extend in the same direction, which is favorable to the stripping operations. The added wall(s) can thus cooperate with the walls fixed to delimit in a precise and controlled manner the different fluid streams towards the different outlets.
  • THE figures 1 to 3 illustrate a projector according to a first embodiment of the invention.
  • FIG. 1 illustrates projector 2 from a front perspective.
  • Headlamp 2 is shown without closing lens. It comprises a casing 4 housing light modules 6, in this case four light modules.
  • the casing 4 also houses a system for cooling the modules 6, more precisely the light sources of the modules in question, comprising a cooling air duct 8 and two fans 10 and 12 connected in an aeraulic manner with the duct 8.
  • the latter comprises air outlets arranged near the radiators of the light modules 6.
  • FIG. 2 is a rear view of the 6 light modules and their cooling system.
  • the two fans 10 and 12 can be observed there arranged in front of corresponding inlets of the duct 8.
  • the modules 6 each comprise a radiator 14 arranged at the rear.
  • the light source(s) of each of the modules 6 are thermally connected to the radiator of the module, so that the cooling air flow of the conduit 8, along the radiators provides cooling of the light source(s) in question.
  • the light sources are advantageously of the semiconductor type, such as for example electroluminescent diodes or else of the laser type.
  • FIG. 3 There picture 3 is a plan view of conduit 8, the latter consisting of two hollow parts 8 1 and 8 2 which are shown in the open state. More specifically, these two parts 8 1 and 8 2 are interconnected by a hinge 8 3 .
  • the hollow parts and the hinge are advantageously made in one piece from a plastic material.
  • Each of the two hollow parts 8 1 and 8 2 comprises two inlets 16 1 /16 2 and 18 1 /18 2 . It is understood that the inputs 16 1 and 16 2 , and the inputs 18 1 and 18 2 , cooperate with each other when the two hollow parts 8 1 and 8 2 are assembled together, to form the inlets 16 and 18 of the duct cooperating with the fans 10 and 12 ( figure 2 ), respectively.
  • the hollow part 8 2 comprises the four outlets 20 1 , 20 2 , 20 3 and 20 4 intended to be arranged close to the radiators 14 of the modules 6 ( figure 2 ).
  • Line 8 thus forms a passage connecting inputs 16 and 18 to outputs 20 1 , 20 2 , 20 3 and 20 4 .
  • the passage is divided into four veins 22 1 , 22 2 , 22 3 and 22 4 specific to the four outlets 20 1 , 20 2 , 20 3 and 20 4 , respectively.
  • the vein 22 1 actually connects the inlet 16 (16 1 +16 2 ) to the outlet 20 1 .
  • the vein 22 2 connects the inlet 18 (18 1 +18 2 ) to the outlet 20 2 .
  • the vein 22 3 connects the inlet 18 to the outlet 20 3 and the vein 22 4 connects the inlet 16 to the outlet 20 4 .
  • Each of the inlets 16 and 18 is thus connected to two veins 22 1 and 22 4 , and 22 2 and 22 3 , respectively.
  • the duct 8 comprises a separation wall 24 (shaded area) arranged close to the inlets 16 and 18 and essentially in the contact plane of the two hollow parts 8 1 and 8 2 .
  • This separating wall is attached in that it is arranged between the two hollow parts 8 1 and 8 2 , this wall being separate from said hollow parts.
  • the added partition wall 24 thus makes it possible to divide each of the two air flows forced into the inlets 16 and 18 by the fans into two fluid streams, in this case the fluid streams 22 1 and 22 4 for the inlet 16 and the fluid veins 22 2 and 22 3 for the inlet 18.
  • the fluid streams are delimited thanks to the fixed separation walls 26 1 , 26 2 , 28 1 , 28 2 , 28 3 , 28 4 and 28 5 of the two hollow parts 8 1 and 8 2 .
  • These fixed partition walls extend generally perpendicular to the mean contact plane of the two hollow parts and, therefore, of the added wall 24.
  • the added wall 24 cooperates with the two walls 26 1 and 26 2 with a view to delimiting, in the hollow part 8 2 , veins 22 1 and 22 2 .
  • the two walls 26 1 and 26 2 have their free edges adjacent to two opposite edges of the added wall 24, respectively. Among the two other edges of the added wall 24, one is adjacent to a side wall of the hollow part 8 2 , along the hinge 8 3 , and the other is located in the entrances 16 and 18 and forms a dividing edge of the flows of these inlets.
  • the hollow parts 8 1 and 8 2 each comprise a bottom wall and side walls, said walls forming a U-shaped profile.
  • the fixed partition walls extend over the bottom walls and are contiguous with the corresponding side walls .
  • the fixed separation walls there are the walls 28 1 and 28 2 on the hollow part 8 2 , of generally curved shape and ensuring appropriate guidance of the fluid streams 22 1 and 22 2 towards the outlets 20 1 and 20 2 .
  • the wall 28 3 still on the hollow part 8 2 , of generally curved shape and ensuring appropriate guidance of the fluid stream 22 3 towards the outlet 20 3 .
  • the fluid stream 22 3 extends, downstream of the added wall 24, over the entire thickness of the duct 8, that is to say in the two hollow parts 8 1 and 8 2 .
  • the fixed wall 28 4 on the hollow part 8 1 cooperates with the fixed wall 28 3 .
  • the fixed wall 28 4 also cooperates with the attached wall 24 in that it comes into contact with the latter.
  • the fixed wall 28 5 on the hollow part 8 1 , also cooperates with the added wall 24 . reported 24.
  • each of the inlets 16 and 18 has a portion of the edge separating the added wall 24, these edge portions ensuring the separation in two of each of the flow rates at the said inlets.
  • each of the flow rates produced by fans 10 and 12 figure 1 And 2
  • the installation of the added wall 24 is particularly simple.
  • the production of the hollow parts 8 1 and 8 2 is also advantageous in that they can be produced in one piece by plastic injection into a mould.
  • the walls delimiting the duct and the fixed partition walls essentially all extend in the same direction, which is favorable to the stripping operations.
  • the added wall 24 can be glued or more simply deposited in a housing on the hollow part 8 2 .
  • the two hollow parts 8 1 and 8 2 can be assembled together by clipping, gluing and/or screwing.
  • THE figures 4 to 6 illustrate a cooling air duct according to a second embodiment, it being understood that this duct can be implemented in a headlight as illustrated in figure 1 .
  • the reference numbers of the first embodiment are used to designate the same elements or corresponding elements, these numbers being however increased by 100 for purposes of distinguishing between the two embodiments. Reference is also made to the description of these elements in relation to the first embodiment. Specific numbers are used for elements specific to this embodiment.
  • the conduit 108 consists, similarly to that of the first mode, essentially of two hollow parts 108 1 and 108 2 interconnected by a hinge 108 3 .
  • the duct 108 has a single inlet 116 (116 1 +116 2 ) for a single fan 110.
  • Each of the hollow parts 108 1 and 108 2 comprises a fixed partition 126 3 and 126 4 , respectively, extending along the axis of the inlet.
  • These two walls 126 3 and 126 4 are advantageously aligned, it being understood, however, that they can also be offset.
  • the added partition wall 124 extends transversely to the walls 126 1 , 126 2 , 126 3 and 126 4 .
  • the walls 126 1 , 126 2 and 126 4 delimit, with the attached wall 124, the veins 122 1 and 122 2 in the hollow part 108 2 .
  • the walls 126 3 , 128 4 and 128 5 delimit, with the attached wall 124, the veins 122 3 and 122 4 in the hollow part 108 1 , at the height of the added wall 124, and in the hollow parts 108 1 and 108 2 , downstream of said wall 124.
  • the conduit outlets may form channels extending transversely to the general extent of the conduit. These channels may have a converging section intended to ensure an acceleration of the flow of cooling air.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Projection Apparatus (AREA)

Description

L'invention a trait au domaine de l'éclairage et/ou de la signalisation lumineuse, notamment pour véhicule automobile. Plus particulièrement, l'invention a trait au refroidissement de modules lumineux d'un projecteur de véhicule automobile.The invention relates to the field of lighting and/or light signaling, in particular for motor vehicles. More particularly, the invention relates to the cooling of light modules of a motor vehicle headlamp.

Les sources lumineuses présentes dans les projecteurs et dispositifs lumineux sont sujettes à échauffement et requièrent souvent d'être refroidies. C'est particulièrement le cas pour les sources lumineuses à semi-conducteurs, comme les diodes à électroluminescence ou encore les diodes laser. Ces sources lumineuses sont en effet de très petite taille pour une puissance d'éclairage importante. Elles sont habituellement disposées sur une platine du type circuit imprimé et sont souvent couplées thermiquement à un ou plusieurs radiateurs.The light sources present in projectors and lighting devices are subject to overheating and often require cooling. This is particularly the case for semi-conductor light sources, such as light-emitting diodes or even laser diodes. These light sources are in fact of very small size for a high lighting power. They are usually arranged on a plate of the printed circuit type and are often thermally coupled to one or more radiators.

Le document de brevet publié DE 10 2007 043 961 A1 divulgue un projecteur comprenant plusieurs modules lumineux dont les sources lumineuses du type semi-conducteurs sont couplées à des radiateurs. Ces derniers sont refroidis par un courant d'air forcé au travers d'un conduit. Ce dernier comprend une entrée d'air de refroidissement mis en mouvement par un ventilateur, plusieurs sorties débouchant à proximité des refroidisseurs et un passage reliant l'entrée aux sorties. Le passage comprend des ramifications divisant le débit d'air de l'entrée en plusieurs débits vers les différentes sorties. La construction du conduit est classique en ce que ce sont les ramifications du conduit qui réalisent la répartition du débit d'air d'entrée. Le nombre de sorties possibles est cependant limité par les ramifications et, par ailleurs, la répartition des débits spécifiques des différentes sorties manque d'être maitrisée. En effet, une perte de charge non identifiée en aval dans une des ramifications peut avoir une influence néfaste importante sur la répartition des débits. De plus, la réalisation des ramifications n'est pas sans poser certains problèmes d'encombrement et de coût de réalisation.The published patent document DE 10 2007 043 961 A1 discloses a projector comprising several light modules whose light sources of the semiconductor type are coupled to radiators. These are cooled by a forced air current through a duct. The latter comprises a cooling air inlet set in motion by a fan, several outlets opening out near the coolers and a passage connecting the inlet to the outlets. The passage includes branches dividing the air flow from the inlet into several flows to the different outlets. The construction of the duct is conventional in that it is the ramifications of the duct which carry out the distribution of the inlet air flow. The number of possible outputs is however limited by the ramifications and, moreover, the distribution of the specific bit rates of the various outputs lacks control. Indeed, an unidentified pressure drop downstream in one of the ramifications can have a significant negative influence on the flow distribution. In addition, the realization of the ramifications is not without posing certain problems of size and cost of realization.

Le document de brevet FR 2 946 730 A1 divulgue, similairement au document précédent, un projecteur pour véhicule automobile, comprenant plusieurs modules dont les sources lumineuses sont refroidies par un débit d'air de refroidissement circulant au travers d'un conduit disposé entre un ventilateur et des radiateurs respectifs des sources lumineuses. Similairement au conduit de l'enseignement précédent, le conduit est amené à présenter une forme encombrante et complexe d'un point de vue coût de production. La répartition des débits y présente les mêmes inconvénients que dans l'enseignement précédent.The patent document FR 2 946 730 A1 discloses, similarly to the previous document, a headlamp for a motor vehicle, comprising several modules whose light sources are cooled by a flow of cooling air circulating through a duct arranged between a fan and respective radiators of the light sources. Similar to the conduit of teaching above, the duct is made to have a bulky and complex shape from a production cost point of view. The distribution of the flow rates has the same drawbacks there as in the previous teaching.

Le document de brevet US 2011/0051453 A1 divulgue un projecteur pour véhicule automobile, comprenant plusieurs modules lumineux dont les sources lumineuses sont en contact thermique avec un radiateur commun. Un ventilateur est disposé en position basse et à distance du radiateur afin de permettre le pivotement des sources lumineuses et du radiateur en relation avec une fonction d'éclairage directionnel. Cette solution est intéressante par sa simplicité mais présente des contraintes en ce qui concerne l'emplacement des modules et plus particulièrement des sources lumineuses.The patent document US 2011/0051453 A1 discloses a headlamp for a motor vehicle, comprising several light modules whose light sources are in thermal contact with a common radiator. A fan is arranged in a low position and at a distance from the radiator in order to allow the pivoting of the light sources and of the radiator in relation to a directional lighting function. This solution is interesting because of its simplicity but presents constraints as regards the location of the modules and more particularly of the light sources.

L'invention a pour objectif de proposer une solution au problème de refroidissement de modules lumineux d'un projecteur ou dispositif lumineux. Plus particulièrement, l'invention a pour objectif de permettre une distribution efficace d'un débit d'air de refroidissement produit par un ou plusieurs radiateurs.The object of the invention is to propose a solution to the problem of cooling light modules of a projector or light device. More particularly, the object of the invention is to allow efficient distribution of a flow of cooling air produced by one or more radiators.

L'invention a pour objet un projecteur pour véhicule automobile, tel que défini dans la revendication 1, comprenant : plusieurs modules lumineux ; un conduit d'air de refroidissement des modules lumineux, avec au moins une entrée d'un flux d'air d'un ou plusieurs ventilateurs, plusieurs sorties d'air vers les modules lumineux, et un passage reliant la ou les entrées avec les sorties ; remarquable en ce que le conduit comprend au moins une paroi rapportée de séparation du passage.The subject of the invention is a headlamp for a motor vehicle, as defined in claim 1, comprising: several light modules; an air duct for cooling the light modules, with at least one inlet for an air flow from one or more fans, several air outlets towards the light modules, and a passage connecting the inlet(s) with the exits ; remarkable in that the duct comprises at least one added wall separating the passage.

Par paroi rapportée, on entend une paroi distincte du corps du conduit, la paroi étant alors fixée audit corps. Le corps forme avantageusement les parois extérieures du conduit.By added wall is meant a separate wall of the body of the duct, the wall then being fixed to said body. The body advantageously forms the outer walls of the duct.

Le passage forme avantageusement plusieurs veines fluides, comme par exemple au moins quatre veines fluides. Chaque veine fluide est avantageusement associée à une ou plusieurs sorties.The passage advantageously forms several fluid veins, such as for example at least four fluid veins. Each fluid stream is advantageously associated with one or more outlets.

Le conduit est avantageusement en matériau plastique, notamment thermoplastique. Selon un mode avantageux de l'invention, la ou au moins une des parois rapportées est adjacente à l'entrée ou au moins une des entrées.The conduit is advantageously made of plastic material, in particular thermoplastic. According to an advantageous embodiment of the invention, the or at least one of the added walls is adjacent to the inlet or at least one of the inlets.

Selon un mode avantageux de l'invention, le conduit s'étend généralement dans un plan, la ou au moins une des parois rapportées étant parallèle audit plan ou formant un angle de moins de 15°, préférentiellement de moins de 10°, avec ledit plan. Selon un mode avantageux de l'invention, la ou au moins une des parois rapportées est configurée pour diviser le flux d'air, préférentiellement à l'entrée dudit conduit, en au moins deux veines séparées vers les différentes sorties.According to an advantageous embodiment of the invention, the duct generally extends in a plane, the or at least one of the added walls being parallel to said plane or forming an angle of less than 15°, preferably less than 10°, with said plan. According to an advantageous embodiment of the invention, the or at least one of the added walls is configured to divide the air flow, preferably at the inlet of said duct, into at least two separate veins towards the different outlets.

Selon un mode avantageux de l'invention, la ou les parois rapportées coopèrent avec une ou plusieurs parois de séparation fixes de manière à diviser le flux d'air, préférentiellement à l'entrée dudit conduit, en au moins quatre veines séparées vers les différentes sorties.According to an advantageous mode of the invention, the added wall or walls cooperate with one or more fixed partition walls so as to divide the air flow, preferably at the inlet of said duct, into at least four separate veins towards the different exits.

Selon un mode avantageux de l'invention, la ou les parois de séparation fixes sont transversales, préférentiellement perpendiculaires, à la ou aux parois rapportées.According to an advantageous embodiment of the invention, the fixed partition(s) are transverse, preferably perpendicular, to the added wall(s).

Selon l'invention, le conduit comprend au moins deux parties creuses assemblées l'une à l'autre, la ou au moins une des parois rapportées étant disposée entre lesdites parties creuses. La ou les parois rapportées sont ainsi prises en sandwich entre les au moins deux parties creuses.According to the invention, the duct comprises at least two hollow parts assembled together, the or at least one of the added walls being placed between said hollow parts. The added wall or walls are thus sandwiched between the at least two hollow parts.

Selon un mode avantageux de l'invention, les au moins deux parties creuses délimitent de manière complémentaire le passage entre la ou les entrées et les sorties, suivant une ou plusieurs sections transversales dudit passage.According to an advantageous embodiment of the invention, the at least two hollow parts delimit in a complementary manner the passage between the inlet or inlets and the outlets, along one or more cross sections of said passage.

Selon un mode avantageux de l'invention, les au moins deux parties creuses forment au moins une charnière les reliant et permettant de les rapprocher en vue de les assembler, ladite charnière étant préférentiellement venue de matière avec lesdites parties creuses.According to an advantageous embodiment of the invention, the at least two hollow parts form at least one hinge connecting them and making it possible to bring them together with a view to assembling them, said hinge being preferentially integral with said hollow parts.

Selon un mode avantageux de l'invention, les au moins deux parties creuses sont assemblées suivant un contact mutuel généralement plan, la ou au moins une des parois rapportées s'étendant parallèlement audit plan ou formant avec ledit plan un angle de moins de 15°, préférentiellement de moins de 10°.According to an advantageous embodiment of the invention, the at least two hollow parts are assembled in generally planar mutual contact, the or at least one of the added walls extending parallel to said plane or forming with said plane an angle of less than 15° , preferably less than 10°.

Selon un mode avantageux de l'invention, les au moins deux parties creuses délimitent l'entrée ou au moins une des entrées, suivant une section transversale de ladite ou desdites entrées.According to an advantageous embodiment of the invention, the at least two hollow parts delimit the inlet or at least one of the inlets, along a cross section of said inlet or inlets.

Selon un mode avantageux de l'invention, chacune des sorties est intégralement formée sur une des au moins deux parties creuses.According to an advantageous mode of the invention, each of the outlets is integrally formed on one of the at least two hollow parts.

Selon un mode avantageux de l'invention, au moins une, préférentiellement chacune, des sorties forme un canal s'étendant transversalement au conduit.According to an advantageous embodiment of the invention, at least one, preferably each, of the outlets forms a channel extending transversely to the duct.

Selon un mode avantageux de l'invention, le canal formé par la ou les sorties présente une section avec un profil convergent.According to an advantageous embodiment of the invention, the channel formed by the outlet or outlets has a section with a convergent profile.

Selon un mode avantageux de l'invention, chacune des au moins deux parties creuses comprend une paroi de fond, la ou chacune des parois de séparation fixes s'étendant sur une desdites parois de fond.According to an advantageous embodiment of the invention, each of the at least two hollow parts comprises a bottom wall, the or each of the fixed partition walls extending over one of said bottom walls.

Selon un mode avantageux de l'invention, chacune des au moins deux parties creuses comprend des parois latérales, la ou chacune des parois de séparation fixes étant en contact avec au moins une des parois latérales.According to an advantageous embodiment of the invention, each of the at least two hollow parts comprises side walls, the or each of the fixed separating walls being in contact with at least one of the side walls.

Selon un mode avantageux de l'invention, les parois de séparation fixes comprennent au moins une paroi de cloisonnement transversale au conduit, avec un bord adjacent à un bord de la ou d'une des parois rapportées, ladite ou lesdites parois de cloisonnement étant préférentiellement généralement droites.According to an advantageous embodiment of the invention, the fixed partition walls comprise at least one partition wall transverse to the duct, with an edge adjacent to an edge of the or one of the added walls, said partition wall(s) preferably being generally straight.

Selon un mode avantageux de l'invention, les parois de séparation fixes comprennent au moins une paroi de guidage s'étendant suivant le conduit, ladite ou lesdites parois de guidage étant préférentiellement courbes.According to an advantageous embodiment of the invention, the fixed partition walls comprise at least one guide wall extending along the duct, said guide wall(s) preferably being curved.

Selon un mode avantageux de l'invention, la ou les parois de cloisonnement sont sur une des au moins deux parties creuses du conduit et la ou au moins une des parois de guidage est sur une autre desdites au moins deux parties creuses.According to an advantageous embodiment of the invention, the partitioning wall or walls are on one of the at least two hollow parts of the conduit and the or at least one of the guide walls is on another of said at least two hollow parts.

Les mesures de l'invention sont intéressantes en ce qu'elles permettent de réaliser un conduit formant plusieurs veines vers différentes sorties, qui est performant et économique. Le conduit est performant en ce que le fait de prévoir au moins une paroi de séparation qui est rapportée permet de séparer de manière optimale les veines fluides. Le conduit est économique à réaliser en ce que toutes ses parois fixes peuvent s'étendre dans la même direction, ce qui est favorable aux opérations de démoulage. La ou les parois rapportées peuvent ainsi coopérer avec les parois fixes pour délimiter de manière précise et contrôlée les différentes veines fluides vers les différentes sorties.The measures of the invention are advantageous in that they make it possible to produce a conduit forming several streams towards different outlets, which is efficient and economical. The duct performs well in that the fact of providing at least one separating wall which is attached makes it possible to separate the fluid streams in an optimal manner. The duct is economical to produce in that all of its fixed walls can extend in the same direction, which is favorable to the stripping operations. The added wall(s) can thus cooperate with the walls fixed to delimit in a precise and controlled manner the different fluid streams towards the different outlets.

D'autres caractéristiques et avantages de la présente invention seront mieux compris à l'aide de la description et des dessins parmi lesquels :

  • La figure 1 est une vue avant d'un projecteur selon un premier mode de réalisation de l'invention ;
  • La figure 2 est une vue arrière des modules et du conduit de refroidissement desdits modules du projecteur de la figure 1 ;
  • La figure 3 est une vue en plan du conduit des figures 1 et 2, le conduit étant en position ouverte ;
  • La figure 4 est une vue en perspective d'un conduit selon un deuxième mode de réalisation, le conduit étant en position ouverte ;
  • La figure 5 est une vue en plan du conduit de la figure 4 ;
  • La figure 6 est une vue en perspective du conduit des figures 4 et 5, à l'état assemblé.
Other characteristics and advantages of the present invention will be better understood using the description and the drawings, among which:
  • There figure 1 is a front view of a projector according to a first embodiment of the invention;
  • There figure 2 is a rear view of the modules and the cooling duct of said projector modules from the figure 1 ;
  • There picture 3 is a plan view of the duct figure 1 And 2 , the duct being in the open position;
  • There figure 4 is a perspective view of a duct according to a second embodiment, the duct being in the open position;
  • There figure 5 is a plan view of the duct of the figure 4 ;
  • There figure 6 is a perspective view of the duct of the figure 4 And 5 , in the assembled state.

Les figures 1 à 3 illustrent un projecteur conforme à un premier mode de réalisation de l'invention.THE figures 1 to 3 illustrate a projector according to a first embodiment of the invention.

La figure 1 illustre le projecteur 2 depuis un point de vue situé à l'avant. Le projecteur 2 est illustré sans glace de fermeture. Il comprend un boîtier 4 logeant des modules lumineux 6, en l'occurrence quatre modules d'éclairage. Le boîtier 4 loge également un système de refroidissement des modules 6, plus précisément des sources lumineuses des modules en question, comprenant un conduit 8 d'air de refroidissement et deux ventilateurs 10 et 12 reliés de manière aéraulique avec le conduit 8. Ce dernier comprend des sorties d'air disposées à proximité de radiateurs des modules lumineux 6.There figure 1 illustrates projector 2 from a front perspective. Headlamp 2 is shown without closing lens. It comprises a casing 4 housing light modules 6, in this case four light modules. The casing 4 also houses a system for cooling the modules 6, more precisely the light sources of the modules in question, comprising a cooling air duct 8 and two fans 10 and 12 connected in an aeraulic manner with the duct 8. The latter comprises air outlets arranged near the radiators of the light modules 6.

La figure 2 est une vue arrière des modules lumineux 6 et de leur système de refroidissement. On peut y observer les deux ventilateurs 10 et 12 disposés devant des entrées correspondantes du conduit 8. On peut également observer que les modules 6 comprennent, chacun, un radiateur 14 disposé à l'arrière. La ou les sources lumineuses de chacun des modules 6 sont reliées thermiquement au radiateur du module, de manière à ce que le débit d'air de refroidissement du conduit 8, le long des radiateurs assure un refroidissement de la ou des sources lumineuses en question.There figure 2 is a rear view of the 6 light modules and their cooling system. The two fans 10 and 12 can be observed there arranged in front of corresponding inlets of the duct 8. It can also be observed that the modules 6 each comprise a radiator 14 arranged at the rear. The light source(s) of each of the modules 6 are thermally connected to the radiator of the module, so that the cooling air flow of the conduit 8, along the radiators provides cooling of the light source(s) in question.

Les sources lumineuses sont avantageusement du type semi-conducteur, comme par exemple des diodes à électroluminescence ou encore du type laser.The light sources are advantageously of the semiconductor type, such as for example electroluminescent diodes or else of the laser type.

La figure 3 est une vue en plan du conduit 8, ce dernier étant constitué de deux parties creuses 81 et 82 qui sont représentées à l'état ouvert. Plus précisément, ces deux parties 81 et 82 sont reliées entre elles par une charnière 83. Les parties creuses et la charnière sont avantageusement réalisées d'un seul tenant en matériau plastique.There picture 3 is a plan view of conduit 8, the latter consisting of two hollow parts 8 1 and 8 2 which are shown in the open state. More specifically, these two parts 8 1 and 8 2 are interconnected by a hinge 8 3 . The hollow parts and the hinge are advantageously made in one piece from a plastic material.

Chacune des deux parties creuses 81 et 82 comprend deux entrées 161/162 et 181/182. Il est entendu que les entrées 161 et 162, et les entrées 181 et 182, coopèrent l'une avec l'autre lorsque les deux parties creuses 81 et 82 sont assemblées l'une à l'autre, pour former les entrées 16 et 18 du conduit coopérant avec les ventilateurs 10 et 12 (figure 2), respectivement.Each of the two hollow parts 8 1 and 8 2 comprises two inlets 16 1 /16 2 and 18 1 /18 2 . It is understood that the inputs 16 1 and 16 2 , and the inputs 18 1 and 18 2 , cooperate with each other when the two hollow parts 8 1 and 8 2 are assembled together, to form the inlets 16 and 18 of the duct cooperating with the fans 10 and 12 ( figure 2 ), respectively.

La partie creuse 82 comprend les quatre sorties 201, 202, 203 et 204 destinées à être disposées à proximité des radiateurs 14 des modules 6 (figure 2). Le conduit 8 forme ainsi un passage reliant les entrées 16 et 18 aux sorties 201, 202, 203 et 204. Plus précisément, le passage est divisé en quatre veines 221, 222, 223 et 224 spécifiques aux quatre sorties 201, 202, 203 et 204, respectivement. La veine 221 relie en effet l'entrée 16 (161+162) à la sortie 201. Similairement, la veine 222 relie l'entrée 18 (181+182) à la sortie 202. La veine 223 relie l'entrée 18 à la sortie 203 et la veine 224 relie l'entrée 16 à la sortie 204. Chacune des entrées 16 et 18 est ainsi reliée à deux veines 221 et 224, et 222 et 223, respectivement. Pour ce faire, le conduit 8 comprend une paroi de séparation 24 (zone hachurée) disposée à proximité des entrées 16 et 18 et essentiellement dans le plan de contact des deux parties creuses 81 et 82. Cette paroi de séparation est rapportée en ce qu'elle est disposée entre les deux parties creuses 81 et 82, cette paroi étant distincte desdites parties creuses. La paroi de séparation rapportée 24 permet ainsi de diviser chacun des deux flux d'air forcés dans les entrées 16 et 18 par les ventilateurs en deux veines fluides, en l'occurrence les veines fluides 221 et 224 pour l'entrée 16 et les veines fluides 222 et 223 pour l'entrée 18.The hollow part 8 2 comprises the four outlets 20 1 , 20 2 , 20 3 and 20 4 intended to be arranged close to the radiators 14 of the modules 6 ( figure 2 ). Line 8 thus forms a passage connecting inputs 16 and 18 to outputs 20 1 , 20 2 , 20 3 and 20 4 . More precisely, the passage is divided into four veins 22 1 , 22 2 , 22 3 and 22 4 specific to the four outlets 20 1 , 20 2 , 20 3 and 20 4 , respectively. The vein 22 1 actually connects the inlet 16 (16 1 +16 2 ) to the outlet 20 1 . Similarly, the vein 22 2 connects the inlet 18 (18 1 +18 2 ) to the outlet 20 2 . The vein 22 3 connects the inlet 18 to the outlet 20 3 and the vein 22 4 connects the inlet 16 to the outlet 20 4 . Each of the inlets 16 and 18 is thus connected to two veins 22 1 and 22 4 , and 22 2 and 22 3 , respectively. To do this, the duct 8 comprises a separation wall 24 (shaded area) arranged close to the inlets 16 and 18 and essentially in the contact plane of the two hollow parts 8 1 and 8 2 . This separating wall is attached in that it is arranged between the two hollow parts 8 1 and 8 2 , this wall being separate from said hollow parts. The added partition wall 24 thus makes it possible to divide each of the two air flows forced into the inlets 16 and 18 by the fans into two fluid streams, in this case the fluid streams 22 1 and 22 4 for the inlet 16 and the fluid veins 22 2 and 22 3 for the inlet 18.

Les veines fluides sont délimitées grâce aux parois de séparation fixes 261, 262, 281, 282, 283, 284 et 285 des deux parties creuses 81 et 82. Ces parois de séparation fixes s'étendent généralement perpendiculairement au plan moyen de contact des deux parties creuses et, partant, de la paroi rapportée 24. La paroi rapportée 24 coopère avec les deux parois 261 et 262 en vue de délimiter, dans la partie creuse 82, les veines 221 et 222. Les deux parois 261 et 262 ont leurs bords libres adjacents à deux bords opposés de la paroi rapportée 24, respectivement. Parmi les deux autres bords de la paroi rapportée 24, l'un est adjacent à une paroi latérale de la partie creuse 82, le long de la charnière 83, et l'autre est situé dans les entrées 16 et 18 et forme un bord de séparation des débits de ces entrées.The fluid streams are delimited thanks to the fixed separation walls 26 1 , 26 2 , 28 1 , 28 2 , 28 3 , 28 4 and 28 5 of the two hollow parts 8 1 and 8 2 . These fixed partition walls extend generally perpendicular to the mean contact plane of the two hollow parts and, therefore, of the added wall 24. The added wall 24 cooperates with the two walls 26 1 and 26 2 with a view to delimiting, in the hollow part 8 2 , veins 22 1 and 22 2 . The two walls 26 1 and 26 2 have their free edges adjacent to two opposite edges of the added wall 24, respectively. Among the two other edges of the added wall 24, one is adjacent to a side wall of the hollow part 8 2 , along the hinge 8 3 , and the other is located in the entrances 16 and 18 and forms a dividing edge of the flows of these inlets.

Les parties creuses 81 et 82 comprennent, chacune, une paroi de fond et des parois latérales, lesdites parois formant un profil en U. Les parois de séparation fixes s'étendent sur les parois de fond et sont jointives avec les parois latérales correspondantes.The hollow parts 8 1 and 8 2 each comprise a bottom wall and side walls, said walls forming a U-shaped profile. The fixed partition walls extend over the bottom walls and are contiguous with the corresponding side walls .

Parmi les parois de séparation fixes, on compte les parois 281 et 282 sur la partie creuse 82, de forme généralement courbe et assurant un guidage approprié des veines fluides 221 et 222 vers les sorties 201 et 202. On compte également la paroi 283, toujours sur la partie creuse 82, de forme généralement courbe et assurant un guidage approprié de la veine fluide 223 vers la sortie 203. La veine fluide 223 s'étend, en aval de la paroi rapportée 24, sur toute l'épaisseur du conduit 8, c'est-à-dire dans les deux parties creuses 81 et 82. A cet effet, la paroi fixe 284 sur la partie creuse 81 coopère avec la paroi fixe 283. Il est à noter que la paroi fixe 284 coopère également avec la paroi rapportée 24 en ce qu'elle vient en contact avec cette dernière. Similairement la paroi fixe 285, sur la partie creuse 81, coopère également avec la paroi rapportée 24. Similairement à la veine fluide 223, la veine fluide 224 s'étend sur toute l'épaisseur du conduit en aval de la paroi rapportée 24.Among the fixed separation walls, there are the walls 28 1 and 28 2 on the hollow part 8 2 , of generally curved shape and ensuring appropriate guidance of the fluid streams 22 1 and 22 2 towards the outlets 20 1 and 20 2 . There is also the wall 28 3 , still on the hollow part 8 2 , of generally curved shape and ensuring appropriate guidance of the fluid stream 22 3 towards the outlet 20 3 . The fluid stream 22 3 extends, downstream of the added wall 24, over the entire thickness of the duct 8, that is to say in the two hollow parts 8 1 and 8 2 . For this purpose, the fixed wall 28 4 on the hollow part 8 1 cooperates with the fixed wall 28 3 . It should be noted that the fixed wall 28 4 also cooperates with the attached wall 24 in that it comes into contact with the latter. Similarly, the fixed wall 28 5 , on the hollow part 8 1 , also cooperates with the added wall 24 . reported 24.

Lorsque les deux parties creuses 81 et 82 sont rabattues l'une sur l'autre de manière à former le conduit 8, chacune des entrées 16 et 18 présente une portion du bord de séparation de la paroi rapportée 24, ces portions de bord assurant la séparation en deux de chacun des débits aux dites entrées. En d'autres termes, chacun des débits produit par les ventilateurs 10 et 12 (figures 1 et 2) est séparé en deux veines fluides à proximité de l'entrée, ce qui assure une répartition maitrisée des débits vers les différents sorties. De plus, la mise en place de la paroi rapportée 24 est particulièrement simple. La réalisation des parties creuses 81 et 82 est également avantageuse en ce qu'elles peuvent être réalisées d'un seul tenant par injection plastique dans un moule. Les parois délimitant le conduit et les parois de séparation fixes s'étendent essentiellement toutes dans la même direction, ce qui est favorable aux opérations démoulage.When the two hollow parts 8 1 and 8 2 are folded over one another so as to form the duct 8, each of the inlets 16 and 18 has a portion of the edge separating the added wall 24, these edge portions ensuring the separation in two of each of the flow rates at the said inlets. In other words, each of the flow rates produced by fans 10 and 12 ( figure 1 And 2 ) is separated into two fluid streams near the inlet, which ensures a controlled distribution of the flows towards the different outputs. In addition, the installation of the added wall 24 is particularly simple. The production of the hollow parts 8 1 and 8 2 is also advantageous in that they can be produced in one piece by plastic injection into a mould. The walls delimiting the duct and the fixed partition walls essentially all extend in the same direction, which is favorable to the stripping operations.

La paroi rapportée 24 peut être collée ou plus simplement déposée dans un logement sur la partie creuse 82. Les deux parties creuses 81 et 82 peuvent être assemblées l'une à l'autre par clippage, collage et/ou vissage.The added wall 24 can be glued or more simply deposited in a housing on the hollow part 8 2 . The two hollow parts 8 1 and 8 2 can be assembled together by clipping, gluing and/or screwing.

Les figures 4 à 6 illustrent un conduit d'air de refroidissement selon un deuxième mode de réalisation, étant entendu que ce conduit peut être mis en oeuvre dans un projecteur tel qu'illustré à la figure 1.THE figures 4 to 6 illustrate a cooling air duct according to a second embodiment, it being understood that this duct can be implemented in a headlight as illustrated in figure 1 .

Les numéros de référence du premier mode de réalisation sont utilisés pour désigner les mêmes éléments ou des éléments correspondants, ces numéros étant toutefois majorés de 100 à des fins de distinction des deux modes de réalisation. Il est par ailleurs fait référence à la description de ces éléments en relation avec le premier mode de réalisation. Des numéros spécifiques sont utilisés pour les éléments spécifiques à ce mode de réalisation.The reference numbers of the first embodiment are used to designate the same elements or corresponding elements, these numbers being however increased by 100 for purposes of distinguishing between the two embodiments. Reference is also made to the description of these elements in relation to the first embodiment. Specific numbers are used for elements specific to this embodiment.

Le conduit 108 est constitué, similairement à celui du premier mode, essentiellement de deux parties creuses 1081 et 1082 reliées entre elles par une charnière 1083.The conduit 108 consists, similarly to that of the first mode, essentially of two hollow parts 108 1 and 108 2 interconnected by a hinge 108 3 .

A la différence du conduit des figures 1 à 3, le conduit 108 présente une seule entrée 116 (1161+1162) pour un seul ventilateur 110. Cela signifie que le débit d'air à l'entrée se voit divisé en quatre veines fluides 1221, 1222, 1223 et 1224 vers les différentes sorties 1201, 1202, 1203 et 1204, respectivement. Chacune des parties creuses 1081 et 1082 comprend une paroi de séparation fixe 1263 et 1264, respectivement, s'étendant dans l'axe de l'entrée. Ces deux parois 1263 et 1264 sont avantageusement alignées, étant toutefois entendu qu'elles peuvent également être décalées. La paroi de séparation rapportée 124 s'étend transversalement aux parois 1261, 1262, 1263 et 1264. Les parois 1261, 1262 et 1264 délimitent, avec la paroi rapportée 124, les veines 1221 et 1222 dans la partie creuse 1082. Similairement, les parois 1263, 1284 et 1285 délimitent, avec la paroi rapportée 124, les veines 1223 et 1224 dans la partie creuse 1081, à hauteur de la paroi rapportée 124, et dans les parties creuses 1081 et 1082, en aval de ladite paroi 124.Unlike the conduit of figures 1 to 3 , the duct 108 has a single inlet 116 (116 1 +116 2 ) for a single fan 110. This means that the air flow at the inlet is divided into four fluid veins 122 1 , 122 2 , 122 3 and 122 4 to the different outputs 120 1 , 120 2 , 120 3 and 120 4 , respectively. Each of the hollow parts 108 1 and 108 2 comprises a fixed partition 126 3 and 126 4 , respectively, extending along the axis of the inlet. These two walls 126 3 and 126 4 are advantageously aligned, it being understood, however, that they can also be offset. The added partition wall 124 extends transversely to the walls 126 1 , 126 2 , 126 3 and 126 4 . The walls 126 1 , 126 2 and 126 4 delimit, with the attached wall 124, the veins 122 1 and 122 2 in the hollow part 108 2 . Similarly, the walls 126 3 , 128 4 and 128 5 delimit, with the attached wall 124, the veins 122 3 and 122 4 in the hollow part 108 1 , at the height of the added wall 124, and in the hollow parts 108 1 and 108 2 , downstream of said wall 124.

A la figure 6, on peut observer les moyens de clippage 130 assurant la liaison entre les deux parties creuses lorsqu'elles sont assemblées l'une à l'autre.To the figure 6 , one can observe the clipping means 130 ensuring the connection between the two hollow parts when they are assembled to one another.

En relation avec les deux modes de réalisation ci-avant et de manière générale, les sorties du conduit peuvent former des canaux s'étendant transversalement à l'étendue générale du conduit. Ces canaux peuvent présenter une section convergente destinée à assurer une accélération du flux d'air de refroidissement.In connection with the two embodiments above and generally, the conduit outlets may form channels extending transversely to the general extent of the conduit. These channels may have a converging section intended to ensure an acceleration of the flow of cooling air.

De manière générale, il est entendu que le nombre d'entrées, de sorties et de veines fluides peut varier des deux modes de réalisation qui sont décrits ci-avant.In general, it is understood that the number of inlets, outlets and fluid streams can vary from the two embodiments which are described above.

Claims (17)

  1. Headlamp (2) for a motor vehicle, comprising:
    - a plurality of light modules (6);
    - a cooling air duct (8; 108) for the light modules (6), with at least one inlet (16, 18; 116) for an air flow from one or more fans (10, 12; 110), a plurality of air outlets (201, 202, 203, 204; 1201, 1202, 1203, 1204) towards the light modules (6), and a passage connecting the one or more inlets with the outlets;
    the duct (8; 108) comprising at least one attached separating wall (24, 124) of the passage; said attached wall being a wall separate from the body of the duct and being fastened to said body of the duct;
    characterized in that the duct (8; 108) comprises at least two hollow parts (81, 82; 1081, 1082) joined to one another, the or at least one of the attached walls (24; 124) being disposed between said hollow parts (81, 82; 1081, 1082).
  2. Headlamp (2) according to Claim 1, characterized in that the or at least one of the attached walls (24, 124) is adjacent to the inlet (116) or at least one of the inlets (16, 18).
  3. Headlamp (2) according to either of Claims 1 and 2, characterized in that the duct (8; 108) extends generally in a plane, the or at least one of the attached walls (24; 124) being parallel to said plane or forming an angle of less than 15°, preferably of less than 10°, with said plane.
  4. Headlamp (2) according to one of Claims 1 to 3, characterized in that the or at least one of the attached walls (24, 124) is configured to divide the air flow, preferably at the inlet (16, 18; 116) of said duct, into at least two separate flow paths (221, 222, 223, 224; 1221, 1222, 1223, 1224) towards the various outlets (201, 202, 203 and 204; 1201, 1202, 1203, 1204).
  5. Headlamp (2) according to one of Claims 1 to 4, characterized in that the one or more attached walls (24, 124) cooperate with one or more fixed separating walls (261, 262, 281, 282, 283, 284, 285; 1261, 1262, 1263, 1264, 1284, 1285) so as to divide the air flow, preferably at the inlet (116) or at the inlets (16, 18) of said duct, into at least four separate flow paths (221, 222, 223, 224; 1221, 1222, 1223, 1224) towards the various outlets (201, 202, 203 and 204; 1201, 1202, 1203, 1204).
  6. Headlamp (2) according to Claim 5, characterized in that the one or more fixed separating walls (261, 262, 281, 282, 283, 284, 285; 1261, 1262, 1263, 1264, 1284, 1285) are transverse, preferably perpendicular, to the one or more attached walls (24; 124).
  7. Headlamp (2) according to one of Claims 1 to 6, characterized in that the at least two hollow parts (81, 82; 1081, 1082) form at least one hinge (83; 1083) connecting them and allowing them to be moved closer together for the purpose of joining them, said hinge (83; 1083) preferably being integrally formed with said hollow parts (81, 82; 1081, 1082).
  8. Headlamp (2) according to one of Claims 1 to 7, characterized in that the at least two hollow parts (81, 82; 1081, 1082) are joined with generally planar mutual contact, the or at least one of the attached walls (24; 124) extending parallel to said plane or forming with said plane an angle of less than 15°, preferably of less than 10°.
  9. Headlamp (2) according to one of Claims 1 to 8, characterized in that the at least two hollow parts (81, 82; 1081, 1082) delimit the inlet (116) or at least one of the inlets (16, 18), along a cross section of said one or more inlets.
  10. Headlamp (2) according to one of Claims 1 to 9, characterized in that each of the outlets (201, 202, 203 and 204; 1201, 1202, 1203, 1204) is integrally formed on one of the at least two hollow parts (81, 82; 1081, 1082).
  11. Headlamp (2) according to one of Claims 1 to 10, characterized in that at least one, preferably each, of the outlets (201, 202, 203, 204; 1201, 1202, 1203, 1204) forms a channel extending transversely to the duct (8; 108) .
  12. Headlamp (2) according to Claim 11, characterized in that the channel formed by the one or more outlets (201, 202, 203, 204; 1201, 1202, 1203, 1204) has a section with a convergent profile.
  13. Headlamp (2) according to one of Claims 5-12 and according to one of Claims 7 to 13, characterized in that each of the at least two hollow parts (81, 82; 1081, 1082) comprises an end wall, the or each of the fixed separating walls (261, 262, 281, 282, 283, 284, 285; 1261, 1262, 1263, 1264, 1284, 1285) extending onto one of said end walls.
  14. Headlamp (2) according to Claim 13, characterized in that each of the at least two hollow parts (81, 82; 1081, 1082) comprises lateral walls, the or each of the fixed separating walls (261, 262, 281, 282, 283, 284, 285; 1261, 1262, 1263, 1264, 1284, 1285) being in contact with at least one of the lateral walls.
  15. Headlamp (2) according to either of Claims 13 and 14, characterized in that the fixed separating walls comprise at least one partitioning wall (261, 262; 1261, 1262) transverse to the duct, with an edge adjacent to an edge of the or of one of the attached walls (24; 124), said one or more partitioning walls preferably being generally straight.
  16. Headlamp (2) according to one of Claims 13 to 15, characterized in that the fixed separating walls comprise at least one guide wall (281, 282, 283, 284, 285; 1284, 1285) extending along the duct (8; 108), said one or more guide walls preferably being curved.
  17. Headlamp (2) according to Claims 15 and 16, characterized in that the one or more partitioning walls (261, 262; 1261, 1262) are on one of the at least two hollow parts (82; 1082) of the duct (8; 108) and the or at least one of the guide walls (284, 285; 1284, 1285) is on another of said at least two hollow parts (81; 1081).
EP16190426.3A 2015-10-09 2016-09-23 Cooling air duct for motor vehicle headlight Active EP3153770B1 (en)

Applications Claiming Priority (1)

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FR1559625A FR3042259B1 (en) 2015-10-09 2015-10-09 COOLING AIR DUCT FOR MOTOR VEHICLE PROJECTOR

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EP3153770B1 true EP3153770B1 (en) 2023-05-17

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EP (1) EP3153770B1 (en)
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CN107023788B (en) 2020-11-06
CN107023788A (en) 2017-08-08
US10451244B2 (en) 2019-10-22
FR3042259B1 (en) 2018-09-07
FR3042259A1 (en) 2017-04-14
EP3153770A1 (en) 2017-04-12

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