EP3502546B1 - Module lumineux pour vehicule comprenant un dispositif de ventilation disposé entre deux dispositifs de dissipation de chaleur - Google Patents

Module lumineux pour vehicule comprenant un dispositif de ventilation disposé entre deux dispositifs de dissipation de chaleur Download PDF

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Publication number
EP3502546B1
EP3502546B1 EP18212726.6A EP18212726A EP3502546B1 EP 3502546 B1 EP3502546 B1 EP 3502546B1 EP 18212726 A EP18212726 A EP 18212726A EP 3502546 B1 EP3502546 B1 EP 3502546B1
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EP
European Patent Office
Prior art keywords
chamber
heat dissipation
lighting module
dissipation device
ventilation device
Prior art date
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Application number
EP18212726.6A
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German (de)
English (en)
French (fr)
Other versions
EP3502546A1 (fr
Inventor
Christophe CLETO
Lotfi REDJEM SAAD
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Vision SAS
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Valeo Vision SAS
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Publication of EP3502546A1 publication Critical patent/EP3502546A1/fr
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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
    • F21S45/30—Ventilation or drainage of lighting devices
    • F21S45/33—Ventilation or drainage of lighting devices specially adapted for headlamps
    • 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]
    • 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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • 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
    • F21S45/47—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
    • 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
    • F21S45/48—Passive cooling, e.g. using fins, thermal conductive elements or openings with means for conducting heat from the inside to the outside of the lighting devices, e.g. with fins on the outer surface of the lighting device
    • 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 headlights for vehicles. It relates more particularly to the field of cooling light modules intended to be mounted in such headlamps.
  • the document FROM 10 2014 10 2870 describes a luminous module comprising a cooling body comprising a base having, on the one hand, a first face on which light emitting means are received, and on the other hand, a second face on which is formed a structure of cooling.
  • the light module also includes a ventilation unit provided to generate forced convection of the cooling structure.
  • a desired objective of the aforementioned document is to improve the cooling capacity of the light-emitting means of the light module, while preserving the compactness of the latter.
  • the document provides that a deflection channel is designed in such a way that it generates a deflection of the air between a direction of flow of an air flow at the outlet of the ventilation unit and a flow direction of the air flow passing through the cooling structure.
  • first lighting function allows the formation of a first light beam, called main beam
  • second lighting function allows the formation of a second light beam, called dipped beam.
  • the first light emitting means can be arranged on a first cooling body, while the second light emitting means can be arranged on a second cooling body separate from the first body.
  • the solution presented in the aforementioned document is not suitable for such a structure and therefore does not support forced cooling of each of the first and second cooling bodies of the light module.
  • the object of the present invention is to overcome at least one of the aforementioned drawbacks and to propose a particular arrangement of a light module making it possible to improve the cooling of each of these lighting elements, while preserving its compactness and its production cost.
  • the third chamber separates the first chamber and the second chamber from each other, and the second heat dissipation device houses the ventilation device.
  • the first chamber comprises an inlet forming an inlet of the cooling circuit, and an outlet
  • the third chamber comprises an inlet, formed by the outlet of the first chamber, and an outlet
  • the second chamber comprises an inlet formed by the outlet of the third chamber, and an outlet forming an outlet of the cooling circuit.
  • the cooling circuit then allows cooling by forced convection of each of the first and second heat dissipation devices, via the ventilation device.
  • the ventilation device allows the formation of a call for air passing through the first chamber and then allowing forced cooling of the first heat dissipation device.
  • the air circulating in the ventilation device is then accelerated and directed towards the second chamber to allow the forced cooling of the second heat dissipation device.
  • the solution of the invention allows cooling by forced convection of each of the heat dissipation devices by the same ventilation device interposed between the first chamber and the second chamber, thus making it possible to preserve the compactness of the light module.
  • Such a positioning of the ventilation device frees up precious space at the input or output of the cooling circuit, which makes it possible to accommodate more easily an actuator of the light module which is the subject of the invention.
  • the cooling circuit is advantageously formed to allow the circulation of an air flow from the first chamber to the second chamber via the third chamber.
  • the first chamber, the second chamber and the third chamber of the cooling circuit together form the cooling circuit of the light module.
  • the cooling circuit is exclusively formed by the first chamber, the second chamber and the third chamber.
  • the first heat dissipation device comprises a mouth and the second heat dissipation device comprises an opening, the mouth forming an inlet of the first chamber of the cooling circuit and the opening forming an outlet from the first chamber of the cooling circuit.
  • the outlet of the first chamber being an inlet of the third chamber, it should be noted that the opening of the second heat dissipation device advantageously makes it possible to fluidically connect the first chamber to the third chamber.
  • the first heat dissipation device comprises a housing and a first heat sink, the housing housing the first heat sink, the mouth, called first mouth, and a second mouth being formed on the casing, so that the second mouth faces the opening of the second heat dissipation device.
  • the second opening and the opening both form an outlet from the first chamber.
  • the opening may comprise a fixing surface cooperating with the second mouth.
  • a fixing surface advantageously makes it possible to fit the housing of the first heat dissipation device onto the second heat dissipation device. This interlocking then contributes to limiting the pressure drops of the flow of air circulating between the first chamber and the third chamber.
  • the casing comprises a housing provided to receive the first heat sink.
  • the first heat sink device then comprises the first heat sink and the housing.
  • the housing delimited by these mouths and its housing makes it possible to form the first chamber according to the invention when the first heat sink is received in this housing.
  • the first heat sink comprises a base comprising a front face and a rear face opposite each other, the front face being intended to receive the at least one first lighting element and the face back comprising a cooling structure extending therefrom.
  • the purpose of such a cooling structure is to increase the exchange surface between the heat dissipated by the first heat sink and a flow of air traversing it.
  • the casing is then preferably formed to surround the first heat sink so as to channel the flow of air onto the first heat sink and force heat exchange between the air and the first heat sink.
  • the cooling structure of the first heat sink is formed by fins.
  • the cooling structure of the first heat sink is formed by rods.
  • the second heat dissipation device houses the ventilation device. Thanks to this feature, it is possible to further optimize the compactness of the light module.
  • the ventilation device comprises an air inlet and an air outlet respectively forming an inlet of the third chamber of the cooling circuit and an outlet of the third chamber of the cooling circuit.
  • the air inlet of the ventilation device faces the opening of the second heat dissipation device.
  • the second heat dissipation device comprises an opening, and the air outlet of the ventilation device forms an inlet of the second chamber of the cooling circuit and the opening forms an outlet of the second chamber of the cooling circuit.
  • the air outlet of the ventilation device then forms, on the one hand, an outlet of the third chamber and, on the other hand, an inlet of the second chamber.
  • the second heat sink device comprises a cover and a heat sink, said second heat sink, the cover at least partially covering the heat sink of the second heat sink device, the opening of the second heat dissipation device being delimited at least in part by the cover.
  • the cover and the second heat sink make it possible to delimit the second chamber.
  • the cover is preferably assembled on the second heat sink to allow a flow of air entering the second chamber to be distributed in the second chamber.
  • the second heat sink comprises a plate comprising a front surface and a rear surface opposite to each other, the front surface being intended to receive the at least one second lighting element and the surface back comprising a cooling structure extending therefrom.
  • the purpose of such a cooling structure is to increase the exchange surface between the heat dissipated by the second heat sink and a flow of air traversing it.
  • the cooling structure is formed by rods.
  • the cooling structure is formed by fins.
  • the cover covers the rear surface of the plate of the second heat sink.
  • the rear surface of the tray and the cover together delimit a volume, the ventilation device being included in this volume.
  • the rear surface of the plate advantageously comprises a flat zone against which the ventilation device is secured. In this way, it is possible to integrate the ventilation device into this volume without increasing the latter.
  • the ventilation device is advantageously surrounded by the cooling structure of the second heat sink. More particularly, the ventilation device is surrounded by the rods of the second heat sink.
  • the at least one first lighting element enables a first lighting function of the light module to be performed.
  • the first lighting function allows the formation of a first light beam, called high beam.
  • the at least one second lighting element allows the realization of a second lighting function of the light module.
  • the second lighting function allows the formation of a second light beam, called dipped beam.
  • the first lighting function of the light module can advantageously be performed by a combination of the at least one first lighting element and the at least one second lighting element.
  • first lighting element and the second lighting element are distinct from each other.
  • the air outlet of the ventilation device and the opening of the second heat dissipation device are arranged to channel an air flow in opposite directions.
  • This particular configuration has the advantage of optimizing the forced convection in the second chamber, by forcing the flow of air to follow an uneven circulation which promotes heat exchange.
  • the air outlet of the ventilation device is arranged to direct an air flow in a first direction perpendicular to a second direction along which this air flow passes the air inlet.
  • the ventilation device comprises a centrifugal fan.
  • a centrifugal fan is of the squirrel cage type, that is to say it comprises a centrifugal wheel.
  • the light module comprises a lens support covering at least the first heat dissipation device, the lens support comprising a recess facing the mouth, called the first mouth.
  • the recess advantageously allows the formation of the call for air when the ventilation device is actuated.
  • the invention also relates to a headlamp for a vehicle, in particular an automobile, comprising a light module as described according to the invention of this document.
  • An interesting technical combination relates to a case as described in this document and intended to equip a light module.
  • the box comprises a lower wall, an upper wall and a bottom wall bounding between them two side walls.
  • the walls of the casing delimit between them a housing in which the first heat sink is received.
  • the upper wall of the casing participates in the formation of a cutting edge of at least one first lighting element.
  • a cut edge forms an area devoid of light.
  • the cut-off edge is advantageously delimited by a front outer edge of the upper wall which forms a cut-off line separating a light beam and the zone devoid of light.
  • a mouth is formed in the lower wall of the casing.
  • a second mouth is formed in the bottom wall of the box.
  • the side walls of the casing each comprise a cutout provided for positioning a heat sink, called the first heat sink, as described in this document, in the housing of the casing.
  • Another object of this interesting technical combination relates to a heat sink device, said first heat sink device as described in this document, comprising the housing and a heat sink, said first heat sink as described in the this document.
  • the luminous module 1 is represented in low view of the front of the luminous module 1 at the figure 1 and low view of the rear of the light module 1 at the figure 2 .
  • the light module 1 is intended to equip a headlight (not shown) of a vehicle.
  • the light module 1 is formed by assembling a lens support 4 and a cover 31 each placed on the same heat sink 30.
  • the light module 1 comprises a projection lens 5.
  • the projection lens 5 is carried by the lens support 4 of the light module 1.
  • the lens support 4 is more particularly formed by a lower part 41 and by an upper part 42.
  • the lower part 41 and the upper part 42 of the lens support 4 take together the projection lens 5.
  • the lower part 41 of the lens support 4 comprises a frame 40 to allow its attachment to the heat sink 30.
  • the lens support 4 of the light module 1, more particularly its lower part 41 comprises a recess 4A
  • the cover 31 delimits at least in part an opening 3B.
  • the recess 4A and the opening 3B form respectively an inlet of a cooling circuit of the luminous module 1 and an outlet of this same cooling circuit of the luminous module 1.
  • Such a cooling circuit adapted to a circulation of an air flow F, aims to allow cooling of the light module 1. More particularly, its purpose is to allow cooling of the heat dissipation devices that it comprises.
  • the light module 1 is shown in exploded view.
  • the lower part 41 of the lens support 4 the upper part 42 of the lens support 4, the projection lens 5, a first heat dissipation device 2, a second heat dissipation device 3 and a ventilation device 6.
  • the lens support 4 of the light module 1 is assembled, by the frame 40 of its lower part 41 from a front surface 32′ of the heat sink 30, while the cover 31 is assembled from a rear surface 32′′ of the heat sink 30.
  • the first heat sink device 2 includes a first heat sink 20 and a housing 21, the second heat sink device 3 includes a second heat sink 30 and the cover 31, as previously described.
  • the ventilation device 6 comprises a centrifugal fan. It should be noted that the second heat sink 30 corresponds to the heat sink described in figure 1 and 2 .
  • the first and second heat dissipation devices 2, 3 and the ventilation device 6 are assembled in the light module 1 in order to form the cooling circuit.
  • the light module 1 represented allows the realization of a first lighting function and a second lighting function.
  • the first lighting function allows the formation of a first light beam, called main beam
  • the second lighting function allows the formation of a second light beam, called dipped beam.
  • the light module 1 comprises first lighting elements 7 and second lighting elements 8 distinct from the first lighting elements 7.
  • the first lighting elements 7 and the second lighting elements lighting 8 include light emitting diodes.
  • At least one of the functions lighting can be performed by the combination of the first and second lighting elements 7, 8.
  • the first lighting function is performed by the combination of the first lighting elements 7 and the second lighting elements 8 and the second lighting function is performed by the second lighting elements 8.
  • the first heat dissipation device 2 comprises the first heat sink 20 and the casing 21.
  • the first heat sink 20 comprises a base 22 comprising a front face 22' and a rear face 22" opposite one another.
  • the rear face 22" of the base 22 comprises a cooling structure 23 formed for example by fins 23 extending from this base 22.
  • the fins 23 of the first heat sink 20 extend, more particularly, from the rear face 22" of the base 22 and perpendicular thereto.
  • the front face 22' of the base 22 carries the first lighting elements 7 described previously, which are located at the level of a high edge 22A of the front face 22' of the base 22.
  • the first lighting elements 7 can be aligned horizontally along the same straight line.
  • Two arms 24 of the first heat sink 20 extend laterally from the base 22 of the first heat sink 20.
  • Each of these arms 24 comprises a first portion 24A provided for positioning the first heat sink 20 in the housing 21 and a second portion 24B provided for fixing the first heat sink 20 on the lower part 41 of the lens support 4 of the housing 21.
  • each arm 24 extends laterally from the base 22 parallel to the rear face 22" of the base 22, while the second portion 24B of each arm 24 extends from the first portion 24A in a direction of orientation of the fins 23. More particularly, each portion 24A, 24B of the arms 24 extends from the base 22 perpendicular to the fins 23.
  • the housing 21 of the heat dissipation device is shown in more detail in figure 4 .
  • the box 21 comprises a bottom wall 21A, an upper wall 21B and a bottom wall 21C bounding between them two side walls 21D.
  • the walls 21A-21D of the casing 21 delimit between them a housing 25 in which the first heat sink 20 is received.
  • a mouth 2A, called the first mouth 2A, is formed in the lower wall 21A of the casing 21 and a second mouth 2B is formed in the bottom wall 21C of the casing 21.
  • the side walls 21D of the casing 21 each comprise a cutout 21D1 provided to allow the passage of the arms 24 and allow the positioning of the first heat sink 20 in the housing 25 of the casing 21. It will be understood that the first mouth 2A and the second mouth 2B are included in the first heat dissipation device 2.
  • the first portions 24A of the arms 24 abut against the cutouts 21D1 of the housing 21.
  • the base 22 of the first heat sink 20 closes by its front face 22' the housing 25 of the casing 21, so that a chamber C1, called the first chamber C1, of the cooling circuit is delimited by each of the walls 21A-21D of the casing 21 and by the base 22 of the first heat sink 20, more particularly by the rear face 22" of the base 22.
  • the first mouth 2A and the second mouth 2B of the casing 21 then respectively form an inlet and an outlet of the first chamber C1.
  • the cooling structure 23 of the first heat sink 20 extends into this first chamber C1.
  • an air passage hole 21E can be provided at the intersection of the bottom wall 21C, of the lower wall 21A with each of the side walls 21D, as shown in figure 4 .
  • Such an air passage hole 21E has the advantage of eliminating any risk of mechanical interference between the first dissipator 20 and the casing 21, so as to guarantee the position of the first lighting elements 7.
  • An air gap L can be formed between the base 22 and the upper wall 21B of the box 21. This air gap L advantageously makes it possible to direct the heat given off by the first lighting elements 7 towards the inside of the first room C1.
  • the arms 24 of the first heat sink 20 are received in cavities 41B of the lower part 41 of the lens support 4.
  • the first portion 24A of the arms 24 then comes to rest against the bottom of each cavity 41B, while the second portion 24B of the arms 24 bears against a stud 41C of the lower part 41 of the lens support 4.
  • a hole 24B1 formed in each second portion 24B of the arms 24 is in correspondence of a bore 41C1 formed in the corresponding stud 41C.
  • the lower wall 21A of the housing 21 is pressed against a lower wall 41D of the lower part 41 of the lens support 4 comprising the recess 4A described above, this to allow positioning the first mouth 2A of the housing 21 opposite the recess 4A of the lens support 4 and channel the air entering the recess 4A of the lens support 4 towards the inlet of the first chamber C1.
  • the first mouth 2A of the housing 21 and the recess 4A of the lens support 4 are advantageously of identical shape.
  • the first lighting elements 7 are advantageously recessed with respect to a front outer edge 21B1 of the upper wall 21B of the housing 21.
  • the second heat dissipation device 3 comprises the second heat sink 30 and the cover 31.
  • the second heat sink 30 comprises a plate 32 comprising a front surface 32' and a rear surface 32" opposite one another.
  • the rear surface 32" of the plate 32 comprises a cooling structure 33 formed for example of the rods 33 extending from this plate 32, as shown in figure 7 .
  • the front surface 32' of the plate 32 carries the second lighting elements 8 described above.
  • the second heat sink 30 comprises a cutout 34 formed in its plate 32 to pass through each of the front and rear surfaces 32', 32" of the plate 32.
  • the cutout 34 extends in particular by a fixing surface 34A to project of the front surface 32 'of the plate 32. It will then be understood that the opening 34 is included in the second heat dissipation device 3.
  • the rear surface 32" of the plate 32 comprises a flat zone 35 intended to receive the ventilation device 6.
  • the flat zone 35 has no cooling structure 33, thus delimiting a space intended to be occupied by the ventilation device 6.
  • the opening 34 is advantageously formed to open onto this flat zone 35 of the rear surface 32" of the plate 32.
  • the cover 31 is intended to be mounted against the rear surface 32" of the plate 32, so that the cooling structure 33 of the second heat sink 30 is covered by the cover 31.
  • an edge of the cover 31 and an edge of the rear surface 32" of the plate 32 delimit the opening 3B described previously. It will then be understood that the opening 3B is included in the second heat dissipation device 3.
  • first bores can be provided on the rear surface 32" of the plate 32 to be in correspondence of holes formed in the cover 31 so that fixing screws can pass through the holes in the cover 31 to fit into the first bores and allow the fixing of the cover 31 on the rear surface 32" of the plate 32.
  • Cover 31 and rear surface 32" of second heat sink 30 together delimit a second chamber C2 of the cooling circuit, one outlet of which is formed by opening 3B of second heat sink device 3.
  • second bores 32A can be provided on the front surface 32' of the plate 32 to be in correspondence of holes 40A formed in the frame 40 of the lower part 41 so that fixing screws can pass through the holes 40A of the frame 40 to be housed in the second bores 32A and allow the fixing of the frame 40 of the lower part 41 of the lens support 4 on the surface before 32 'of the plate 32.
  • the opening 34 of the second heat sink 30 is then facing the second mouth 2B of the first heat dissipation device 2 described previously.
  • the fixing surface 34A of the opening 34 is arranged to fit the second mouth 2B.
  • the fixing surface 34A and the second mouth 2B are preferably of complementary shapes with each other to allow this arrangement.
  • the ventilation device 6 is housed in the second heat dissipation device 3. More particularly, the rear surface 32" of the plate 32 and the cover 31 together delimit a volume V in which the ventilation device 6 is included.
  • the ventilation device 6 is arranged against the flat zone 35 of the rear surface 32" of the plate 32 of the second heat sink 30.
  • an air inlet 6A - visible at the picture 3 - of the ventilation device 6 leads to the opening 34 of the plate 32 of the second heat sink 30.
  • an air outlet 6B - visible to figure 3 And 7 - The ventilation device 6 opens into the second chamber C2 of the cooling circuit.
  • the air inlet 6A and the air outlet 6B of the ventilation device 6 respectively form an inlet and an outlet of a third chamber C3 of the cooling circuit.
  • the opening 34 of the plate 32 of the second heat sink 30 forms both an outlet for the first chamber C1 and, at the same time, an inlet for the third chamber C3.
  • the ventilation device 6 can be mounted by screwing onto the flat area 35 of the rear surface 32" of the second heat sink 30.
  • the air outlet 6B of the ventilation device 6 forms an inlet of the second chamber C2.
  • the air outlet 6B of the ventilation device 6 and the opening 3B of the second heat dissipation device 3 are each arranged to channel an air flow in opposite directions. According to the example illustrated here, the air outlet 6B and the opening 3B extend in parallel planes, or substantially parallel.
  • the ventilation device 6 advantageously comprises a centrifugal fan configured to allow the air outlet 6B of the ventilation device 6 to direct an air flow perpendicularly with respect to its air inlet 6A.
  • a power supply plug 60 is provided to power the ventilation device 6.
  • a power supply cable can be provided to pass through the opening 3B of the second heat dissipation device 3 and be connected to the power supply plug. power supply 60 of the ventilation device 6.
  • the cooling circuit of the light module 1 is formed successively by the first chamber C1, by the third chamber C3 and by the second chamber C2 delimited respectively by the first heat dissipation device 2, by the ventilation device 6 and by the second heat dissipation device 3.
  • a flow of air F is shown traversing the first heat dissipation device and the second heat dissipation device, via the ventilation device.
  • the third chamber C3 separates the first chamber C1 and the second chamber C2 from the cooling circuit.
  • the ventilation device 6 When the ventilation device 6 is electrically controlled, the latter generates at its air inlet 6A a call for air making it possible to direct a flow of air F from the inlet 2A of the first chamber C1 towards the outlet 2B of the first chamber C1.
  • This call for air advantageously makes it possible to force the cooling of the fins 23 of the first heat sink 20 included in the first chamber C1.
  • the air flow F is directed towards the inlet 6A of the third chamber C3 via the opening 34 to be accelerated by the centrifugal fan before being discharged into the second chamber C2 from the exit 6B of the third chamber C3, also forming an entry 3A of the second chamber C2.
  • the air flow F is then directed from the inlet 3A of the second chamber C2 towards a first wall 31A of the cover 31 opposite a second wall 31B of the cover 31 partly delimiting the opening 3B of the second heat dissipation device 3.
  • the air outlet 6B is oriented so that the air flow F is directed towards, and strikes against, the first wall 31A of the cover 31. This optimizes the forced convection in the second chamber C2 by forcing the air flow F to change direction through the cooling structure 33 of the second heat sink 30, thus increasing the heat exchange between the heat sink 32 and the air flow.
  • the light module 1 is shown without the upper part 42 of the lens support 4, but with its lower part 41 of the lens support 4.
  • the first heat dissipation device 2 and the second heat dissipation device 3 are arranged l relative to each other to perform the first and second lighting functions of the light module 1. More particularly, in this arrangement, the first lighting elements 7 carried by the first heat sink 20 and the second lighting elements Lighting 8 carried by the second heat sink 30 are arranged on their respective heat sink 20, 30 so as to be separated by a cutting edge.
  • the cutting edge is advantageously formed by the upper wall 21B of the casing 21. More particularly, the cutting edge is formed by the front outer edge 21B1.
  • the cut-off edge makes it possible to prevent the emission of light by the first lighting elements 7 above the cut-off edge. This advantageously makes it possible to perform the first lighting function, that is to say the formation of a first light beam, called high beam, which can be projected from the projection lens 5. It will be understood that, when the first lighting function is carried out, the first and the second lighting elements 7, 8 are used.
  • the emission of light emitted by the second lighting elements 8 is advantageously projected by the projection lens 5 to form the second light beam, called dipped beam. It will be understood that, when the second lighting function is performed, the first lighting elements 7 are not used.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP18212726.6A 2017-12-22 2018-12-14 Module lumineux pour vehicule comprenant un dispositif de ventilation disposé entre deux dispositifs de dissipation de chaleur Active EP3502546B1 (fr)

Applications Claiming Priority (1)

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FR1762903A FR3075929B1 (fr) 2017-12-22 2017-12-22 Module lumineux pour vehicule comprenant un dispositif de ventilation dispose entre deux dispositifs de dissipation de chaleur

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EP3502546A1 EP3502546A1 (fr) 2019-06-26
EP3502546B1 true EP3502546B1 (fr) 2023-07-12

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US (1) US10738964B2 (zh)
EP (1) EP3502546B1 (zh)
CN (1) CN109973939B (zh)
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FR3103537B1 (fr) * 2019-11-21 2022-06-24 Valeo Vision Dispositif lumineux pour véhicule automobile
CN115059600B (zh) * 2022-08-15 2022-12-09 宁波从越电子设备有限公司 一种车载充气泵

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WO2017104679A1 (ja) * 2015-12-15 2017-06-22 株式会社小糸製作所 車両用灯具

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DE102004025624A1 (de) * 2004-05-25 2005-12-15 Hella Kgaa Hueck & Co. Scheinwerfer mit Wärmetauscher zur Kühlung von Leuchtmitteln
US7329033B2 (en) * 2005-10-25 2008-02-12 Visteon Global Technologies, Inc. Convectively cooled headlamp assembly
DE102007043961C5 (de) * 2007-09-14 2017-04-06 Automotive Lighting Reutlingen Gmbh Beleuchtungseinrichtung mit Halbleiterlichtquelle
CN201547566U (zh) * 2009-11-23 2010-08-11 北京星光影视设备科技股份有限公司 变焦成像灯led光源部件
CN103453422B (zh) * 2013-08-30 2016-03-09 安徽湛蓝光电科技有限公司 Led汽车前照灯近光光学模组
JP6689198B2 (ja) * 2014-07-23 2020-04-28 株式会社小糸製作所 灯具ユニットおよび車両用前照灯
JP2017120736A (ja) * 2015-12-28 2017-07-06 パナソニックＩｐマネジメント株式会社 前照灯及び移動体

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WO2017104679A1 (ja) * 2015-12-15 2017-06-22 株式会社小糸製作所 車両用灯具

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Publication number Publication date
CN109973939B (zh) 2021-09-28
EP3502546A1 (fr) 2019-06-26
CN109973939A (zh) 2019-07-05
US10738964B2 (en) 2020-08-11
US20190195463A1 (en) 2019-06-27
FR3075929A1 (fr) 2019-06-28
FR3075929B1 (fr) 2021-01-29

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