EP3502546A1 - Light module for a vehicle comprising a ventilation device arranged between two devices for heat dissipation - Google Patents
Light module for a vehicle comprising a ventilation device arranged between two devices for heat dissipation Download PDFInfo
- Publication number
- EP3502546A1 EP3502546A1 EP18212726.6A EP18212726A EP3502546A1 EP 3502546 A1 EP3502546 A1 EP 3502546A1 EP 18212726 A EP18212726 A EP 18212726A EP 3502546 A1 EP3502546 A1 EP 3502546A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- chamber
- light module
- heat dissipating
- heat sink
- dissipating device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000009423 ventilation Methods 0.000 title claims abstract description 62
- 230000017525 heat dissipation Effects 0.000 title description 8
- 238000001816 cooling Methods 0.000 claims abstract description 76
- 230000015572 biosynthetic process Effects 0.000 description 10
- 235000021183 entrée Nutrition 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 2
- 241000555745 Sciuridae Species 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
Images
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 vehicle projectors. It relates more particularly to the field of cooling light modules intended to be mounted in such projectors.
- the document DE 10 2014 10 2870 discloses a light module comprising a cooling body having a base having, firstly, a first face on which light emission means are received, and secondly, a second face on which is formed a structure of cooling.
- the light module also includes a ventilation unit provided to generate a 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 thereof.
- the document provides that a deflection channel is designed such that it generates a deflection of air between a flow direction 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, said high beam
- second lighting function allows the formation of a second light beam, said low beam
- the first light emitting means may be disposed on a first cooling body, while the second light emitting means may be disposed on a second cooling body separate from the first body.
- the solution presented in the aforementioned document is not adapted to such a structure and therefore does not support forced cooling of each of the first and second cooling body of the light module.
- the present invention aims to overcome at least one of the aforementioned drawbacks and to provide a particular arrangement of a light module 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 one another.
- the cooling circuit then allows forced convection cooling of each of the first and second heat dissipating devices, through the ventilation device.
- the ventilation device allows the formation of a call air through the first chamber and then allowing forced cooling of the first heat dissipating device.
- the air circulating in the ventilation device is then accelerated and directed towards the second chamber to allow forced cooling of the second heat dissipating device.
- the solution of the invention allows forced convection cooling of each of the heat dissipating devices by a same ventilation device interposed between the first chamber and the second chamber, thus preserving the compactness of the light module.
- Such positioning of the ventilation device releases a valuable place at the inlet or outlet of the cooling circuit, which makes it easier to accommodate an actuator of the light module object of the invention.
- the cooling circuit is advantageously formed to allow the circulation of a flow of air from the first chamber to the second chamber through 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 dissipating device comprises a mouth and the second heat dissipating device comprises an aperture, the mouth forming an inlet of the first chamber of the cooling circuit and the aperture forming an outlet of the first chamber of the cooling circuit.
- the opening of the second heat dissipation device advantageously makes it possible to connect the first chamber to the third chamber in a fluid manner.
- the first heat dissipating device comprises a housing and a first heat sink, the housing housing the first heat sink, the mouth, said first mouth, and a second mouth being formed. on the housing, so that the second mouth is opposite the a journey of the second heat dissipating device.
- the second mouth When the second mouth is disposed opposite the a journey, the second mouth and the a journey both form an outlet of the first chamber.
- the opening may include a fastening surface cooperating with the second mouth.
- a fixing surface advantageously allows to fit the casing of the first heat dissipating device on the second heat dissipating device. This interlocking then contributes to limiting the pressure drop of the flow of air flowing between the first chamber and the third chamber.
- the housing comprises a housing provided to receive the first heat sink.
- the first heat dissipating 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 having a front face and a rear face opposite to each other, the front face being intended to receive the at least one first lighting element and the face rear including a cooling structure extending therefrom.
- a cooling structure is intended to increase the exchange surface between the heat dissipated by the first heat sink and a flow of air flowing through it.
- the housing is then preferably formed to surround the first heat sink so as to channel the air flow on the first dissipator and force the heat exchange between the air and the first dissipator.
- 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 dissipating 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 is opposite the opening of the second heat dissipating device.
- the second heat dissipating 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 dissipating 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 dissipating device, the opening of the second heat dissipating device being delimited at least in part by the cover.
- the lid and the second heat sink define the second chamber.
- the cover is preferably assembled on the second heat sink to allow an air flow entering the second chamber to be distributed in the second chamber.
- the second heat sink comprises a plate having a front surface and a rear surface opposite to each other, the front surface being adapted to receive the at least one second lighting element and the surface rear including a cooling structure extending therefrom.
- a cooling structure aims to increase the exchange surface between the heat dissipated by the second heat sink and a flow of air flowing through 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 lid together define a volume, the ventilation device being included in this volume.
- the rear surface of the plate advantageously comprises a flat area against which is secured the ventilation device. In this way, it is possible to integrate the ventilation device in this volume without increasing it.
- 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 allows the realization of a first lighting function of the light module.
- 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 low beam.
- the first lighting function of the light module can be advantageously achieved 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 one another.
- the air outlet of the ventilation device and the opening of the second heat dissipating device are arranged to channel a flow of air in opposite directions.
- This particular configuration has the advantage of optimizing the forced convection in the second chamber, forcing the flow of air to follow a traffic that favors heat exchange.
- the air outlet of the ventilation device is arranged to guide a flow of air 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 that it comprises a centrifugal wheel.
- the light module comprises a lens support covering at least the first heat dissipating device, the lens support comprising a recess facing the mouth, said first mouth.
- the recess advantageously allows the formation of the call of air when the ventilation device is actuated.
- the subject of the invention is also a vehicle headlamp, in particular an automobile headlamp, comprising a light module as described according to the invention of the present document.
- the housing comprises a bottom wall, an upper wall and a bottom wall bounding between them two side walls.
- the walls of the housing delimit between them a housing in which is received the first heat sink.
- the upper wall of the housing contributes to the formation of a cutting edge of at least a first lighting element.
- a cutting edge forms a zone devoid of light.
- the cutting edge is advantageously delimited by a front outer edge of the upper wall which forms a cutoff line separating a light beam and the light-free zone.
- a mouth is formed in the bottom wall of the housing.
- a second mouth is formed in the bottom wall of the housing.
- the side walls of the housing each comprise a cutout provided for positioning a heat sink, said first heat sink, as described herein, in the housing housing.
- Another object of this interesting technical combination relates to a heat dissipation device, said first heat dissipation device as described herein, comprising the housing and a heat sink, said first heat sink as described in FIG. this document.
- the light module 1 As illustrated in Figures 1 and 2 , the light module 1 according to the invention is shown in a bottom view of the front of the light module 1 to the figure 1 and low view from the back of the light module 1 to the figure 2 .
- the light module 1 is intended to equip a projector (not shown) of a vehicle.
- the light module 1 is formed by the assembly of a lens support 4 and a cover 31 each disposed 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 portion 41 and an upper portion 42.
- the lower portion 41 and the upper portion 42 of the lens holder 4 together take the projection lens 5.
- the lower portion 41 of the lens holder 4 comprises a frame 40 to allow its attachment to the heat sink 30.
- the lens holder 4 of the light module 1, more particularly its lower portion 41, comprises a recess 4A
- the cover 31 defines at least partly an opening 3B.
- the recess 4A and the opening 3B form respectively an input of a cooling circuit of the light module 1 and an output of the same cooling circuit of the light module 1.
- Such a cooling circuit adapted to a circulation of an air flow F, is intended to allow a cooling of the light module 1. More particularly, it is intended to allow cooling of the heat dissipating devices it comprises.
- the light module 1 is shown in exploded view. Thus, it is represented the lower portion 41 of the lens holder 4, the upper portion 42 of the lens holder 4, the projection lens 5, a first heat dissipating device 2, a second heat dissipating device 3 and a ventilation device 6.
- the lens holder 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 dissipating device 2 comprises a first heat sink 20 and a housing 21
- the second heat dissipating device 3 comprises a second heat sink 30 and the cover 31, as described above.
- the ventilation device 6 includes a centrifugal fan. It should be noted that the second heat sink 30 corresponds to the dissipator described in figure 1 and 2 .
- the first and second heat dissipating 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 shown 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, said high beam
- the second lighting function allows the formation of a second light beam, said low beam.
- the light module 1 comprises first lighting elements 7 and second lighting elements 8 different from the first lighting elements 7.
- the first lighting elements 7 and the second elements lighting devices 8 include light-emitting diodes. At least one of the functions The first lighting function is preferably achieved by combining the first lighting elements 7 and the second lighting elements 8 and 8. the second lighting function is performed by the second lighting elements 8.
- the first heat dissipating device 2 comprises the first heat sink 20 and the housing 21.
- the first heat sink 20 comprises a base 22 comprising a front face 22 'and a rear face 22 "opposite one to the other.
- 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 above, which are located at a high edge 22A of the front face 22 'of the base 22.
- the first lighting elements 7 can be aligned horizontally in 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 portion 41 of the lens holder 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 d Orientation of the fins 23. More particularly, each portion 24A, 24B of the arms 24 extends from the base 22 perpendicularly to the fins 23.
- the housing 21 of the heat dissipating device is shown in more detail in FIG. figure 4 .
- the housing 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 housing 21 delimit between them a housing 25 in which is received the first heat sink 20.
- a mouth 2A, said first mouth 2A, is formed in the bottom wall 21A of the housing 21 and a second mouth 2B is formed in the bottom wall 21C of the housing 21.
- the side walls 21D of the housing 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 housing 21. It will be understood that the first mouth 2A and the second mouth 2B are included in the first heat dissipating device 2.
- the first portions 24A of the arms 24 abut against the cutouts 21D1 of the housing 21.
- the base 22 the first heat sink 20 closes the housing 25 of the housing 21 with its front face 22 ', 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 housing 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 housing 21 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 may be provided at the intersection of the bottom wall 21C, the bottom wall 21A with each of the side walls 21D, as shown in FIG. 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 housing 21, so as to guarantee the position of the first lighting elements 7.
- An air gap L may be formed between the base 22 and the upper wall 21B of the housing 21. This air gap L advantageously makes it possible to direct the heat released 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 portion 41 of the lens support 4.
- the first portion 24A of the arms 24 then abuts against the bottom of each cavity 41B, while the second 24B portion of the arm 24 bears against a stud 41C of the lower portion 41 of the lens holder 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 portion 41 of the lens support 4 having the recess 4A described above, 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 to 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 dissipating 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 to the other.
- the rear surface 32 "of the plate 32 comprises a cooling structure 33 formed, for example, of rods 33 extending from this plate 32, as shown in FIG. figure 7 .
- the front surface 32 'of the plate 32 carries the second lighting elements 8 previously described.
- the second heat sink 30 comprises an aperture 34 formed in its plate 32 to pass through each of the front and rear surfaces 32 ', 32 "of the plate 32.
- the aperture 34 extends in particular through a fixing surface 34A to protrude of the front surface 32 'of the plate 32. It will then be understood that the aperture 34 is included in the second heat dissipating device 3.
- the rear surface 32 "of the plate 32 comprises a flat zone 35 designed 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 aperture 34 is advantageously formed to lead to this flat area 35 of the rear surface 32 "of the plate 32.
- the cover 31 is provided 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 define the opening 3B described above, it will be understood that the opening 3B is included in the second heat dissipating device 3.
- first bores may 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 may pass through the holes of the cover 31 to be housed in the first bores and allow the fixing of the cover 31 on the rear surface 32 "of the plate 32.
- the cover 31 and the rear surface 32 "of the second heat sink 30 together define a second chamber C2 of the cooling circuit, an output of which is formed by the opening 3B of the second heat dissipating device 3.
- second bores 32A may 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 fit in the second bores 32A and allow the attachment of the frame 40 of the lower portion 41 of the lens holder 4 to the surface before 32 'of the plate 32.
- the aperture 34 of the second heat sink 30 is then facing the second mouth 2B of the first heat dissipation device 2 described above.
- the attachment surface 34A of the aperture 34 is arranged to fit the second mouth 2B.
- the attachment range 34A and the second mouth 2B are preferably complementary shapes to each other to allow this arrangement.
- the ventilation device 6 is housed in the second heat dissipating device 3. More particularly, the rear surface 32 "of the plate 32 and the lid 31 together define a volume V in which the ventilation device 6 is comprised.
- the ventilation device 6 is disposed 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 figure 3 - The ventilation device 6 opens on the aperture 34 of the plate 32 of the second heat sink 30.
- an air outlet 6B - visible to the figures 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 aperture 34 of the plate 32 of the second heat sink 30 forms, at one and the same time, an output of the first chamber C1 and at the same time an input of the third chamber C3.
- the ventilation device 6 can be screwed 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 dissipating device 3 are each arranged to channel a flow of air in opposite directions.
- the air outlet 6B and the opening 3B extend in parallel or substantially parallel planes.
- the ventilation device 6 advantageously comprises a centrifugal fan configured to allow the air outlet 6B of the ventilation device 6 to direct a stream of air perpendicular to its air inlet 6A.
- An electrical power plug 60 is provided to electrically power the ventilation device 6.
- a power supply cable may be provided to pass through the opening 3B of the second heat dissipating device 3 and be connected to the plug of the device. electrical 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 dissipating device 3.
- An air flow F is shown running through the first heat dissipating device and the second heat dissipating 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, it generates at its air inlet 6A a call for air to direct a flow of air F from the inlet 2A of the first chamber C1 to the outlet 2B of the first room C1.
- This air intake 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 to the inlet 6A of the third chamber C3 via the aperture 34 to be accelerated by the centrifugal fan before being rejected in the second chamber C2 from the outlet 6B of the third chamber C3, also forming an inlet 3A of the second chamber C2.
- the air flow F is then directed from the inlet 3A of the second chamber C2 to a first wall 31A of the cover 31 opposite a second wall 31B of the cover 31 partially defining the opening 3B of the second heat dissipating device 3.
- the air outlet 6B is oriented so that the air flow F is directed towards and hits 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 dissipator 32 and the air flow.
- the light module 1 is shown without the upper part 42 of the lens holder 4, but with its lower part 41 of the lens holder 4.
- the first heat-dissipating device 2 and the second heat-dissipating device 3 are arranged l relative to one another 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 heat sink 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 housing 21. More particularly, the cutting edge is formed by the outer front edge 21B1.
- the cutting edge makes it possible to prevent the emission of light by the first lighting elements 7 above the cutting edge. This advantageously makes it possible to achieve the first lighting function, that is to say the formation of a first light beam, said high beam, which can be projected from the projection lens 5. It will be understood that, when the first lighting function is performed, the first and 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, said low 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)
Abstract
L'invention a pour objet un module lumineux (1) pour véhicule, le module lumineux (1) comprenant un circuit de refroidissement comportant : une première chambre (C1) délimitée par un premier dispositif de dissipation de chaleur (2) et prévue pour le refroidissement d'au moins un premier élément d'éclairage (7) du module lumineux (1), une deuxième chambre (C2) délimitée par un deuxième dispositif de dissipation de chaleur (3) et prévue pour le refroidissement d'au moins un deuxième élément d'éclairage (8) du module lumineux (1), et une troisième chambre (C3) délimitée par un dispositif de ventilation (6). Selon l'invention, la troisième chambre (C3) sépare la première chambre (C1) et la deuxième chambre (C2) l'une de l'autre.The invention relates to a light module (1) for a vehicle, the light module (1) comprising a cooling circuit comprising: a first chamber (C1) delimited by a first heat dissipating device (2) and provided for the cooling of at least a first lighting element (7) of the light module (1), a second chamber (C2) delimited by a second heat dissipating device (3) and provided for cooling at least a second lighting element (8) of the light module (1), and a third chamber (C3) delimited by a ventilation device (6). According to the invention, the third chamber (C3) separates the first chamber (C1) and the second chamber (C2) from one another.
Description
L'invention relève du domaine des projecteurs pour véhicule. Elle concerne plus particulièrement le domaine du refroidissement des modules lumineux destinés à être montés dans de tels projecteurs.The invention relates to the field of vehicle projectors. It relates more particularly to the field of cooling light modules intended to be mounted in such projectors.
Le document
Un objectif recherché du document précité est d'améliorer la capacité de refroidissement des moyens d'émission de lumière du module lumineux, tout en préservant la compacité de celui-ci. Pour cela, le document prévoit qu'un canal de déviation est conçu de telle sorte qu'il génère une déviation de l'air entre un sens d'écoulement d'un flux d'air en sortie de l'unité de ventilation et un sens d'écoulement du flux d'air traversant la structure de refroidissement.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 thereof. For this, the document provides that a deflection channel is designed such that it generates a deflection of air between a flow direction of an air flow at the outlet of the ventilation unit and a flow direction of the air flow passing through the cooling structure.
Toutefois, le document cité ne trouve pas une application dans des modules lumineux comprenant distinctement des premiers moyens d'émission de lumière et des deuxièmes moyens d'émission de lumière, où ces premiers et deuxièmes moyens d'émission de lumière sont destinés à réaliser une première fonction d'éclairage et une deuxième fonction d'éclairage. Dans de tels modules, la première fonction d'éclairage permet la formation d'un premier faisceau lumineux, dit feux de route, alors que la deuxième fonction d'éclairage permet la formation d'un deuxième faisceau lumineux, dit feux de croisement.However, the cited document does not find an application in light modules distinctly comprising first light-emitting means and second light-emitting means, wherein these first and second light-emitting means are intended to produce a light source. first lighting function and a second lighting function. In such modules, the first lighting function allows the formation of a first light beam, said high beam, while the second lighting function allows the formation of a second light beam, said low beam.
Dans cette application, les premiers moyens d'émission de lumière peuvent être disposés sur un premier corps de refroidissement, alors que les deuxièmes moyens d'émission de lumière peuvent être disposés sur un deuxième corps de refroidissement distinct du premier corps. La solution présentée dans le document précité n'est pas adaptée à une telle structure et ne prend donc pas en charge un refroidissement forcé de chacun des premier et deuxième corps de refroidissement du module lumineux.In this application, the first light emitting means may be disposed on a first cooling body, while the second light emitting means may be disposed on a second cooling body separate from the first body. The solution presented in the aforementioned document is not adapted to such a structure and therefore does not support forced cooling of each of the first and second cooling body of the light module.
De plus, une telle solution appliquée à ces modules lumineux nécessite des modifications structurelles importantes contribuant à augmenter le coût de production d'un tel module lumineux.In addition, such a solution applied to these light modules requires significant structural changes contributing to increase the production cost of such a light module.
La présente invention a pour but de pallier à au moins l'un des inconvénients précités et de proposer un agencement particulier d'un module lumineux permettant d'améliorer le refroidissement de chacun de ces éléments d'éclairage, tout en préservant sa compacité et son coût de production.The present invention aims to overcome at least one of the aforementioned drawbacks and to provide a particular arrangement of a light module to improve the cooling of each of these lighting elements, while preserving its compactness and its production cost.
A cet effet, l'invention a pour objet un module lumineux pour véhicule, le module lumineux comprenant un circuit de refroidissement comportant :
- une première chambre délimitée par un premier dispositif de dissipation de chaleur et prévue pour le refroidissement d'au moins un premier élément d'éclairage du module lumineux,
- une deuxième chambre délimitée par un deuxième dispositif de dissipation de chaleur et prévue pour le refroidissement d'au moins un deuxième élément d'éclairage du module lumineux, et
- une troisième chambre délimitée par un dispositif de ventilation.
- a first chamber delimited by a first heat dissipating device and provided for cooling at least a first lighting element of the light module,
- a second chamber delimited by a second heat dissipating device and provided for cooling at least one second lighting element of the light module, and
- a third chamber defined by a ventilation device.
Selon l'invention, la troisième chambre sépare la première chambre et la deuxième chambre l'une de l'autre.According to the invention, the third chamber separates the first chamber and the second chamber from one another.
Le circuit de refroidissement permet alors un refroidissement par convection forcée de chacun des premier et deuxième dispositifs de dissipation de chaleur, par l'intermédiaire du dispositif de ventilation. En effet, le dispositif de ventilation permet la formation d'un appel d'air traversant la première chambre et permettant alors un refroidissement forcé du premier dispositif de dissipation de chaleur. L'air circulant dans le dispositif de ventilation est alors accéléré et dirigé vers la deuxième chambre pour permettre le refroidissement forcé du deuxième dispositif de dissipation de chaleur. La solution de l'invention permet le refroidissement par convection forcée de chacun des dispositifs de dissipation de chaleur par un même dispositif de ventilation interposé entre la première chambre et la deuxième chambre, permettant ainsi de préserver la compacité du module lumineux.The cooling circuit then allows forced convection cooling of each of the first and second heat dissipating devices, through the ventilation device. Indeed, the ventilation device allows the formation of a call air through the first chamber and then allowing forced cooling of the first heat dissipating device. The air circulating in the ventilation device is then accelerated and directed towards the second chamber to allow forced cooling of the second heat dissipating device. The solution of the invention allows forced convection cooling of each of the heat dissipating devices by a same ventilation device interposed between the first chamber and the second chamber, thus preserving the compactness of the light module.
Un tel positionnement du dispositif de ventilation libère une place précieuse en entrée ou en sortie du circuit de refroidissement, ce qui permet de loger plus facilement un actionneur du module lumineux objet de l'invention.Such positioning of the ventilation device releases a valuable place at the inlet or outlet of the cooling circuit, which makes it easier to accommodate an actuator of the light module object of the invention.
Le circuit de refroidissement est avantageusement formé pour permettre la circulation d'un flux d'air depuis la première chambre vers la deuxième chambre en passant par la troisième chambre.The cooling circuit is advantageously formed to allow the circulation of a flow of air from the first chamber to the second chamber through the third chamber.
Selon une particularité de l'invention, la première chambre, la deuxième chambre et la troisième chambre du circuit de refroidissement forment ensemble le circuit de refroidissement du module lumineux. En d'autres termes, le circuit de refroidissement est exclusivement formé par la première chambre, la deuxième chambre et la troisième chambre.According to a feature of the invention, the first chamber, the second chamber and the third chamber of the cooling circuit together form the cooling circuit of the light module. In other words, the cooling circuit is exclusively formed by the first chamber, the second chamber and the third chamber.
Selon un mode de réalisation de l'invention, le premier dispositif de dissipation de chaleur comprend une bouche et le deuxième dispositif de dissipation de chaleur comprend un ajour, la bouche formant une entrée de la première chambre du circuit de refroidissement et l'ajour formant une sortie de la première chambre du circuit de refroidissement.According to one embodiment of the invention, the first heat dissipating device comprises a mouth and the second heat dissipating device comprises an aperture, the mouth forming an inlet of the first chamber of the cooling circuit and the aperture forming an outlet of the first chamber of the cooling circuit.
La sortie de la première chambre étant une entrée de la troisième chambre, il est à noter que l'ajour du deuxième dispositif de dissipation de chaleur permet avantageusement de relier de façon fluidique la première chambre à la troisième chambre.Since the outlet of the first chamber is an inlet of the third chamber, it should be noted that the opening of the second heat dissipation device advantageously makes it possible to connect the first chamber to the third chamber in a fluid manner.
Selon un autre mode de réalisation de l'invention, le premier dispositif de dissipation de chaleur comprend un boîtier et un premier dissipateur de chaleur, le boîtier logeant le premier dissipateur de chaleur, la bouche, dite première bouche, et une deuxième bouche étant formées sur le boîtier, de sorte que la deuxième bouche soit en regard de l'ajour du deuxième dispositif de dissipation de chaleur.According to another embodiment of the invention, the first heat dissipating device comprises a housing and a first heat sink, the housing housing the first heat sink, the mouth, said first mouth, and a second mouth being formed. on the housing, so that the second mouth is opposite the ajour of the second heat dissipating device.
Lorsque la deuxième bouche est disposée en regard de l'ajour, la deuxième bouche et l'ajour forment tous deux une sortie de la première chambre.When the second mouth is disposed opposite the ajour, the second mouth and the ajour both form an outlet of the first chamber.
L'ajour peut comprendre une portée de fixation coopérant avec la deuxième bouche. Une telle portée de fixation permet avantageusement d'emboîter le boîtier du premier dispositif de dissipation de chaleur sur le deuxième dispositif de dissipation de chaleur. Cet emboîtement contribue alors à limiter les pertes de charge du flux d'air circulant entre la première chambre et la troisième chambre.The opening may include a fastening surface cooperating with the second mouth. Such a fixing surface advantageously allows to fit the casing of the first heat dissipating device on the second heat dissipating device. This interlocking then contributes to limiting the pressure drop of the flow of air flowing between the first chamber and the third chamber.
Avantageusement, le boîtier comprend un logement prévu pour recevoir le premier dissipateur de chaleur. Le premier dispositif de dissipation de chaleur comprend alors le premier dissipateur de chaleur et le boîter. Le boîtier délimité par ces bouches et son logement permet de former la première chambre selon l'invention lorsque le premier dissipateur de chaleur est reçu dans ce logement.Advantageously, the housing comprises a housing provided to receive the first heat sink. The first heat dissipating 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.
De façon plus particulière, le premier dissipateur de chaleur comprend une base comportant une face avant et une face arrière opposées l'une à l'autre, la face avant étant destinée à recevoir l'au moins un premier élément d'éclairage et la face arrière comprenant une structure de refroidissement s'étendant depuis cette dernière. Une telle structure de refroidissement a pour but d'augmenter la surface d'échange entre la chaleur dissipée par le premier dissipateur de chaleur et un flux d'air la parcourant. Lorsque le premier dissipateur de chaleur comprend une telle base, il est possible d'utiliser la face arrière de la base pour fermer le logement du boîter.More particularly, the first heat sink comprises a base having a front face and a rear face opposite to each other, the front face being intended to receive the at least one first lighting element and the face rear including a cooling structure extending therefrom. Such a cooling structure is intended to increase the exchange surface between the heat dissipated by the first heat sink and a flow of air flowing through it. When the first heat sink includes such a base, it is possible to use the rear face of the base to close the housing of the housing.
Le boîtier est alors préférentiellement formé pour entourer le premier dissipateur de chaleur de sorte à canaliser le flux d'air sur le premier dissipateur et forcer l'échange thermique entre l'air et le premier dissipateur.The housing is then preferably formed to surround the first heat sink so as to channel the air flow on the first dissipator and force the heat exchange between the air and the first dissipator.
Avantageusement, la structure de refroidissement du premier dissipateur de chaleur est formée par des ailettes. Alternativement, la structure de refroidissement du premier dissipateur de chaleur est formée par des tiges.Advantageously, the cooling structure of the first heat sink is formed by fins. Alternatively, the cooling structure of the first heat sink is formed by rods.
Selon un mode de réalisation particulier de l'invention, le deuxième dispositif de dissipation de chaleur loge le dispositif de ventilation. Grâce à cette particularité, il est possible d'optimiser davantage la compacité du module lumineux.According to a particular embodiment of the invention, the second heat dissipating device houses the ventilation device. Thanks to this feature, it is possible to further optimize the compactness of the light module.
Selon une caractéristique de l'invention, le dispositif de ventilation comprend une entrée d'air et une sortie d'air formant respectivement une entrée de la troisième chambre du circuit de refroidissement et une sortie de la troisième chambre du circuit de refroidissement.According to a characteristic of the invention, 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.
Selon une variante de réalisation de l'invention, l'entrée d'air du dispositif de ventilation est en regard de l'ajour du deuxième dispositif de dissipation de chaleur.According to an alternative embodiment of the invention, the air inlet of the ventilation device is opposite the opening of the second heat dissipating device.
Selon une autre caractéristique de l'invention, le deuxième dispositif de dissipation de chaleur comprend une ouverture, et la sortie d'air du dispositif de ventilation forme une entrée de la deuxième chambre du circuit de refroidissement et l'ouverture forme une sortie de la deuxième chambre du circuit de refroidissement.According to another characteristic of the invention, the second heat dissipating 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.
Il convient de noter que la sortie d'air du dispositif de ventilation forme alors, d'une part, une sortie de la troisième chambre et, d'autre part, une entrée de la deuxième chambre.It should be noted that 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.
Selon une variante de l'invention, le deuxième dispositif de dissipation de chaleur comprend un couvercle et un dissipateur de chaleur, dit deuxième dissipateur de chaleur, le couvercle recouvrant au moins partiellement le dissipateur de chaleur du deuxième dispositif de dissipation de chaleur, l'ouverture du deuxième dispositif de dissipation de chaleur étant délimitée au moins en partie par le couvercle.According to a variant of the invention, the second heat dissipating 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 dissipating device, the opening of the second heat dissipating device being delimited at least in part by the cover.
Le couvercle et le deuxième dissipateur de chaleur permettent de délimiter la deuxième chambre. Ainsi, le couvercle est préférentiellement assemblé sur le deuxième dissipateur de chaleur pour permettre à un flux d'air en entrée de la deuxième chambre d'être réparti dans la deuxième chambre.The lid and the second heat sink define the second chamber. Thus, the cover is preferably assembled on the second heat sink to allow an air flow entering the second chamber to be distributed in the second chamber.
De façon plus particulière, le deuxième dissipateur de chaleur comprend un plateau comportant une surface avant et une surface arrière opposées l'une à l'autre, la surface avant étant destinée à recevoir l'au moins un deuxième élément d'éclairage et la surface arrière comprenant une structure de refroidissement s'étendant depuis cette dernière. Une telle structure de refroidissement a pour but d'augmenter la surface d'échange entre la chaleur dissipée par le deuxième dissipateur de chaleur et un flux d'air la parcourant.More particularly, the second heat sink comprises a plate having a front surface and a rear surface opposite to each other, the front surface being adapted to receive the at least one second lighting element and the surface rear including a cooling structure extending therefrom. Such a cooling structure aims to increase the exchange surface between the heat dissipated by the second heat sink and a flow of air flowing through it.
Avantageusement, la structure de refroidissement est formée par des tiges. Alternativement, la structure de refroidissement est formée par des ailettes.Advantageously, the cooling structure is formed by rods. Alternatively, the cooling structure is formed by fins.
Avantageusement, le couvercle recouvre la surface arrière du plateau du deuxième dissipateur de chaleur.Advantageously, the cover covers the rear surface of the plate of the second heat sink.
Selon un mode de réalisation de l'invention, la surface arrière du plateau et le couvercle délimitent ensemble un volume, le dispositif de ventilation étant compris dans ce volume.According to one embodiment of the invention, the rear surface of the tray and the lid together define a volume, the ventilation device being included in this volume.
Pour préserver ce volume, la surface arrière du plateau comprend avantageusement une zone plane contre laquelle est solidarisé le dispositif de ventilation. De cette façon, il est possible d'intégrer le dispositif de ventilation dans ce volume sans augmenter celui-ci.To preserve this volume, the rear surface of the plate advantageously comprises a flat area against which is secured the ventilation device. In this way, it is possible to integrate the ventilation device in this volume without increasing it.
Le dispositif de ventilation est avantageusement entouré par la structure de refroidissement du deuxième dissipateur de chaleur. Plus particulièrement, le dispositif de ventilation est entouré par les tiges du deuxième dissipateur de chaleur.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.
Avantageusement, l'au moins un premier élément d'éclairage permet la réalisation d'une première fonction d'éclairage du module lumineux. La première fonction d'éclairage permet la formation d'un premier faisceau lumineux, dit feux de route.Advantageously, the at least one first lighting element allows the realization of a first lighting function of the light module. The first lighting function allows the formation of a first light beam, called high beam.
Avantageusement, l'au moins un deuxième élément d'éclairage permet la réalisation d'une deuxième fonction d'éclairage du module lumineux. La deuxième fonction d'éclairage permet la formation d'un deuxième faisceau lumineux, dit feux de croisement.Advantageously, 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 low beam.
La première fonction d'éclairage du module lumineux peut être avantageusement réalisée par une combinaison de l'au moins un premier élément d'éclairage et de l'au moins un deuxième élément d'éclairage.The first lighting function of the light module can be advantageously achieved by a combination of the at least one first lighting element and the at least one second lighting element.
Il convient de noter que le premier élément d'éclairage et le deuxième élément d'éclairage sont distincts l'un de l'autre.It should be noted that the first lighting element and the second lighting element are distinct from one another.
Selon un mode de réalisation avantageux de l'invention, la sortie d'air du dispositif de ventilation et l'ouverture du deuxième dispositif de dissipation de chaleur sont agencées pour canaliser un flux d'air selon des sens opposés. Cette configuration particulière a pour intérêt d'optimiser la convection forcée dans la deuxième chambre, en forçant le flux d'air à suivre une circulation accidentée qui favorise les échanges thermiques.According to an advantageous embodiment of the invention, the air outlet of the ventilation device and the opening of the second heat dissipating device are arranged to channel a flow of air in opposite directions. This particular configuration has the advantage of optimizing the forced convection in the second chamber, forcing the flow of air to follow a traffic that favors heat exchange.
Selon un autre mode de réalisation de l'invention, la sortie d'air du dispositif de ventilation est agencée pour orienter un flux d'air selon une première direction perpendiculaire à une deuxième direction le long de laquelle ce flux d'air passe l'entrée d'air.According to another embodiment of the invention, the air outlet of the ventilation device is arranged to guide a flow of air in a first direction perpendicular to a second direction along which this air flow passes the air inlet.
Avantageusement, le dispositif de ventilation comprend un ventilateur centrifuge. Un tel ventilateur centrifuge est de type cage d'écureuil, c'est-à-dire qu'il comprend une roue centrifuge.Advantageously, the ventilation device comprises a centrifugal fan. Such a centrifugal fan is of the squirrel cage type, that is to say that it comprises a centrifugal wheel.
Selon une autre caractéristique de l'invention, le module lumineux comprend un support de lentille recouvrant au moins le premier dispositif de dissipation de chaleur, le support de lentille comprenant un évidement en regard de la bouche, dite première bouche. L'évidement permet avantageusement la formation de l'appel d'air lorsque le dispositif de ventilation est actionné.According to another characteristic of the invention, the light module comprises a lens support covering at least the first heat dissipating device, the lens support comprising a recess facing the mouth, said first mouth. The recess advantageously allows the formation of the call of air when the ventilation device is actuated.
L'invention a également pour objet un projecteur pour véhicule, notamment automobile, comprenant un module lumineux tel que décrit selon l'invention du présent document.The subject of the invention is also a vehicle headlamp, in particular an automobile headlamp, comprising a light module as described according to the invention of the present document.
Une combinaison technique intéressante concerne un boîtier tel que décrit dans le présent document et destiné à équiper un module lumineux.An interesting technical combination concerns a housing as described herein. document and intended to equip a light module.
Avantageusement, le boîtier comprend une paroi inférieure, une paroi supérieure et une paroi de fond bornant entre elles deux parois latérales.Advantageously, the housing comprises a bottom wall, an upper wall and a bottom wall bounding between them two side walls.
Avantageusement, les parois du boîtier délimitent entre elles un logement dans lequel est reçu le premier dissipateur de chaleur.Advantageously, the walls of the housing delimit between them a housing in which is received the first heat sink.
Avantageusement, la paroi supérieure du boîtier participe à la formation d'une arête de coupure d'au moins un premier élément d'éclairage. Une telle arête de coupure forme une zone dépourvue de lumière.Advantageously, the upper wall of the housing contributes to the formation of a cutting edge of at least a first lighting element. Such a cutting edge forms a zone devoid of light.
L'arête de coupure est avantageusement délimitée par une bordure extérieure avant de la paroi supérieure qui forme une ligne de coupure séparant un faisceau lumineux et la zone dépourvue de lumière.The cutting edge is advantageously delimited by a front outer edge of the upper wall which forms a cutoff line separating a light beam and the light-free zone.
Avantageusement, une bouche, dite première bouche, est formée dans la paroi inférieure du boîtier.Advantageously, a mouth, said first mouth, is formed in the bottom wall of the housing.
Avantageusement, une deuxième bouche est formée dans la paroi de fond du boîtier.Advantageously, a second mouth is formed in the bottom wall of the housing.
Avantageusement, les parois latérales du boîtier comprennent chacune une découpe prévue pour positionner un dissipateur de chaleur, dit premier dissipateur de chaleur, tel que décrit dans le présent document, dans le logement du boîtier.Advantageously, the side walls of the housing each comprise a cutout provided for positioning a heat sink, said first heat sink, as described herein, in the housing housing.
Un autre objet de cette combinaison technique intéressante concerne un dispositif de dissipation de chaleur, dit premier dispositif de dissipation de chaleur tel que décrit dans le présent document, comprenant le boîtier et un dissipateur de chaleur, dit premier dissipateur de chaleur tel que décrit dans le présent document.Another object of this interesting technical combination relates to a heat dissipation device, said first heat dissipation device as described herein, comprising the housing and a heat sink, said first heat sink as described in FIG. this document.
D'autres caractéristiques, détails et avantages de l'invention ressortiront plus clairement à la lecture de la description donnée ci-après à titre indicatif en relation avec des dessins dans lesquels :
- la
figure 1 est une vue basse en perspective de l'avant d'un module lumineux selon l'invention, - la
figure 2 est une vue basse en perspective de l'arrière du module lumineux de lafigure 1 , - la
figure 3 est une vue éclatée du module lumineux illustré auxfigures 1 ,et 2 - la
figure 4 montre une vue en perspective d'un boîtier du premier dissipateur de chaleur, - la
figure 5 montre une vue en perspective à l'état assemblé du premier dispositif de dissipation de chaleur formé par le boîtier de lafigure 4 et par un premier dissipateur de chaleur logé dans le boîtier, - la
figure 6 montre une vue de dessus d'une partie inférieure d'un support de lentille du module lumineux prévue pour recevoir le premier dispositif de dissipation de chaleur, - la
figure 7 montre un deuxième dissipateur de chaleur du deuxième dispositif de dissipation de chaleur, le deuxième dissipateur de chaleur est représenté vue de l'arrière où une surface arrière de celui-ci est prévue pour recevoir le dispositif de ventilation, - la
figure 8 montre une vue en coupe verticale en perspective du module lumineux illustré auxfigures 1 ,et 2 - la
figure 9 montre le module lumineux selon l'invention dépourvu d'une partie supérieure d'un support de lentille du module lumineux.
- the
figure 1 is a low perspective view of the front of a light module according to the invention, - the
figure 2 is a low perspective view of the back of the light module of thefigure 1 , - the
figure 3 is an exploded view of the light module illustrated inFigures 1 and 2 , - the
figure 4 shows a perspective view of a housing of the first heat sink, - the
figure 5 shows a perspective view in the assembled state of the first heat dissipation device formed by the housing of thefigure 4 and by a first heat sink housed in the housing, - the
figure 6 shows a top view of a lower portion of a lens holder of the light module adapted to receive the first heat dissipating device, - the
figure 7 shows a second heat sink of the second heat dissipating device, the second heat sink is shown from the rear where a rear surface thereof is provided to receive the ventilation device, - the
figure 8 shows a perspective vertical sectional view of the light module illustrated in FIGS.Figures 1 and 2 , - the
figure 9 shows the light module according to the invention without an upper part of a lens holder of the light module.
Tel qu'illustré aux
Dans l'exemple illustré sur ces
En référence à la
Le support de lentille 4 du module lumineux 1 est assemblé, par le cadre 40 de sa partie inférieure 41 depuis une surface avant 32' du dissipateur de chaleur 30, alors que le couvercle 31 est assemblé depuis une surface arrière 32" du dissipateur de chaleur 30.The
De façon plus détaillée, le premier dispositif de dissipation de chaleur 2 comprend un premier dissipateur de chaleur 20 et un boîtier 21, le deuxième dispositif de dissipation de chaleur 3 comprend un deuxième dissipateur de chaleur 30 et le couvercle 31, tel que décrit précédemment. Le dispositif de ventilation 6 comprend lui un ventilateur centrifuge. Il convient de noter que le deuxième dissipateur de chaleur 30 correspond au dissipateur décrit aux
Les premier et deuxième dispositifs de dissipation de chaleur 2, 3 et le dispositif de ventilation 6 sont assemblés dans le module lumineux 1 en vue de former le circuit de refroidissement.The first and second
En se référant à la
Pour réaliser ces fonctions d'éclairage, le module lumineux 1 comprend des premiers éléments d'éclairage 7 et des deuxièmes éléments d'éclairage 8 distincts des premiers éléments d'éclairage 7. Avantageusement, les premiers éléments d'éclairage 7 et les deuxièmes éléments d'éclairage 8 comprennent des diodes électroluminescentes. Au moins l'une des fonctions d'éclairage peut être réalisée par la combinaison des premiers et deuxièmes éléments d'éclairage 7, 8. Préférentiellement, la première fonction d'éclairage est réalisée par la combinaison des premiers éléments d'éclairage 7 et des deuxièmes éléments d'éclairage 8 et la deuxième fonction d'éclairage est réalisée par les deuxièmes éléments d'éclairage 8.To achieve these lighting functions, the
On va maintenant décrire plus en détails chacun des premier et deuxième dispositif de dissipation de chaleur 2, 3.Each of the first and second
En se référant à la
Deux bras 24 du premier dissipateur de chaleur 20 s'étendent latéralement depuis la base 22 du premier dissipateur de chaleur 20. Chacun de ces bras 24 comprend une première portion 24A prévue pour positionner le premier dissipateur de chaleur 20 dans le boîtier 21 et une deuxième portion 24B prévue pour la fixation du premier dissipateur de chaleur 20 sur la partie inférieure 41 du support de lentille 4 du boîtier 21.Two
La première portion 24A de chaque bras 24 s'étend latéralement depuis la base 22 parallèlement à la face arrière 22" de la base 22, alors que la deuxième portion 24B de chaque bras 24 s'étend depuis la première portion 24A dans une direction d'orientation des ailettes 23. Plus particulièrement, chaque portion 24A, 24B des bras 24 s'étend depuis la base 22 perpendiculairement aux ailettes 23.The
Le boîtier 21 du dispositif de dissipation de chaleur est représenté plus en détails à la
Tel que cela est représenté à la
Optionnellement, un trou 21E de passage d'air peut être prévu à l'intersection de la paroi de fond 21C, de la paroi inférieure 21A avec chacune des parois latérales 21D, telles que représentées à la
Une lame d'air L peut être formée entre la base 22 et la paroi supérieure 21B du boîtier 21. Cette lame d'air L permet avantageusement de diriger la chaleur dégagée par les premiers éléments d'éclairage 7 vers l'intérieur de la première chambre C1.An air gap L may be formed between the base 22 and the
Pour assembler le premier dispositif de dissipation de chaleur 2, représenté à la
Tels que représentés à la
En se référant de nouveau à la
La surface avant 32' du plateau 32 porte les deuxièmes éléments d'éclairage 8 décrits précédemment.The front surface 32 'of the
Le deuxième dissipateur de chaleur 30 comprend un ajour 34 formé dans son plateau 32 pour traverser chacune des surfaces avant et arrière 32', 32" du plateau 32. L'ajour 34 s'étend notamment par une portée de fixation 34A pour être en saillie de la surface avant 32' du plateau 32. On comprendra alors que l'ajour 34 est compris dans le deuxième dispositif de dissipation de chaleur 3.The
Telle que représentée à la
L'ajour 34 est avantageusement formé pour déboucher sur cette zone plane 35 de la surface arrière 32" du plateau 32.The
En référence à la
Pour permettre la fixation du couvercle 31 sur la surface arrière 32" du plateau 32, des premiers alésages peuvent être prévus sur la surface arrière 32" du plateau 32 pour être en correspondance de trous formés dans le couvercle 31 de sorte que des vis de fixation puissent traverser les trous du couvercle 31 pour se loger dans les premiers alésages et permettre la fixation du couvercle 31 sur la surface arrière 32" du plateau 32.To allow the fixing of the
Le couvercle 31 et la surface arrière 32" du deuxième dissipateur de chaleur 30 délimitent ensemble une deuxième chambre C2 du circuit de refroidissement, dont une sortie est formée par l'ouverture 3B du deuxième dispositif de dissipation de chaleur 3.The
Pour permettre la fixation de la partie inférieure 41 du support de lentille 4 sur la surface avant 32' du plateau 32, des deuxièmes alésages 32A peuvent être prévus sur la surface avant 32' du plateau 32 pour être en correspondance de trous 40A formés dans le cadre 40 de la partie inférieure 41 de sorte que des vis de fixation puissent traverser les trous 40A du cadre 40 pour se loger dans les deuxièmes alésages 32A et permettre la fixation du cadre 40 de la partie inférieure 41 du support de lentille 4 sur la surface avant 32' du plateau 32.To allow the attachment of the
Lorsque la partie inférieure 41 du support de lentille 4 - préalablement équipée du premier dispositif de dissipation de chaleur 2 - est montée sur le plateau 32 du deuxième dissipateur de chaleur 30, l'ajour 34 du deuxième dissipateur de chaleur 30 est alors en regard de la deuxième bouche 2B du premier dispositif de dissipation de chaleur 2 décrit précédemment. Préférentiellement, la portée de fixation 34A de l'ajour 34 est agencée pour emboîter la deuxième bouche 2B. La portée de fixation 34A et la deuxième bouche 2B sont préférentiellement de formes complémentaires l'une avec l'autre pour permettre cet agencement.When the
En se référant à la
Tel que cela est illustré à la
La sortie d'air 6B du dispositif de ventilation 6 forme une entrée de la deuxième chambre C2. La sortie d'air 6B du dispositif de ventilation 6 et l'ouverture 3B du deuxième dispositif de dissipation de chaleur 3 sont chacune agencées pour canaliser un flux d'air selon des sens opposés. Selon l'exemple illustré ici, la sortie d'air 6B et l'ouverture 3B s'étendent dans des plans parallèles, ou sensiblement parallèles.The
Le dispositif de ventilation 6 comprend avantageusement un ventilateur centrifuge configuré pour permettre que la sortie d'air 6B du dispositif de ventilation 6 oriente un flux d'air perpendiculairement par rapport à son entrée d'air 6A.The
Une fiche d'alimentation électrique 60 est prévue pour alimenter électriquement le dispositif de ventilation 6. Un câble d'alimentation électrique peut être prévu pour passer par l'ouverture 3B du deuxième dispositif de dissipation de chaleur 3 et être relié à la fiche d'alimentation électrique 60 du dispositif de ventilation 6.An
En se référant à la
Il est à noter de ce qui précède que la troisième chambre C3 sépare la première chambre C1 et la deuxième chambre C2 du circuit de refroidissement.It should be noted from the foregoing that the third chamber C3 separates the first chamber C1 and the second chamber C2 from the cooling circuit.
De façon plus détaillée, il convient de noter que :
l'entrée 2A de la première chambre C1 forme une entrée du circuit de refroidissement,la sortie 2B de la première chambre C1 forme une entrée de la troisième chambre C3,la sortie 6B de la troisième chambre C3 forme une entrée 3A de la deuxième chambre C2,la sortie 3B de la deuxième chambre C2 forme une sortie du circuit de refroidissement.
- the
inlet 2A of the first chamber C1 forms an inlet of the cooling circuit, - the
outlet 2B of the first chamber C1 forms an inlet of the third chamber C3, - the
outlet 6B of the third chamber C3 forms aninlet 3A of the second chamber C2, - the
outlet 3B of the second chamber C2 forms an outlet of the cooling circuit.
On va maintenant décrire le fonctionnement du circuit de refroidissement en se référant à la
La vue en coupe de la
- la première bouche 2A du premier dispositif de dissipation de chaleur 2
formant l'entrée 2A de la première chambre C1 et étant de forme identique à l'évidement 4A de la partie inférieure 41 du support de lentille 4, - la deuxième bouche 2B du premier dispositif de dissipation de chaleur 2
formant la sortie 2B de la première chambre C1, l'entrée d'air 6A du dispositif deventilation 6formant l'entrée 6A de la troisième chambre C3,l'ajour 34 du deuxième dispositif de dissipation de chaleur 3 reliant de façon fluidique la sortie 2A de la première chambre C1 et l'entrée 6A de la troisième chambre C3,la sortie d'air 6B du dispositif deventilation 6formant la sortie 6B de la troisième chambre C3 et l'entrée 3A de la deuxième chambre C2,- l'ouverture 3B du deuxième dispositif de dissipation de chaleur 3
formant la sortie 3B de la deuxième chambre C2.
- the
first mouth 2A of the firstheat dissipating device 2 forming theinlet 2A of the first chamber C1 and being of identical shape to therecess 4A of thelower part 41 of thelens support 4, - the
second mouth 2B of the firstheat dissipating device 2 forming theoutlet 2B of the first chamber C1, - the
air inlet 6A of theventilation device 6 forming theinlet 6A of the third chamber C3, - the
aperture 34 of the secondheat dissipating device 3 fluidly connecting theoutlet 2A of the first chamber C1 and theinlet 6A of the third chamber C3, - the
air outlet 6B of theventilation device 6 forming theoutlet 6B of the third chamber C3 and theinlet 3A of the second chamber C2, - the
opening 3B of the secondheat dissipating device 3 forming theoutlet 3B of the second chamber C2.
Lorsque le dispositif de ventilation 6 est commandé électriquement, ce dernier génère à son entrée d'air 6A un appel d'air permettant de diriger un flux d'air F depuis l'entrée 2A de la première chambre C1 vers la sortie 2B de la première chambre C1. Cet appel d'air permet avantageusement de forcer le refroidissement des ailettes 23 du premier dissipateur de chaleur 20 comprises dans la première chambre C1. Par la suite, le flux d'air F est dirigé vers l'entrée 6A de la troisième chambre C3 via l'ajour 34 pour être accéléré par le ventilateur centrifuge avant d'être rejeté dans la deuxième chambre C2 depuis la sortie 6B de la troisième chambre C3, formant également une entrée 3A de la deuxième chambre C2. Le flux d'air F est alors dirigé depuis l'entrée 3A de la deuxième chambre C2 vers une première paroi 31A du couvercle 31 opposée à une deuxième paroi 31B du couvercle 31 délimitant en partie l'ouverture 3B du deuxième dispositif de dissipation de chaleur 3. La sortie d'air 6B est orientée de telle sorte que le flux d'air F se dirige vers, et frappe contre, la première paroi 31A du couvercle 31. On optimise ainsi la convection forcée dans la deuxième chambre C2 en forçant le flux d'air F à changer de direction à travers la structure de refroidissement 33 du deuxième dissipateur de chaleur 30, augmentant ainsi l'échange thermique entre le dissipateur 32 et le flux d'air.When the
En se référant à la
L'arête de coupure est avantageusement formée par la paroi supérieure 21B du boîtier 21. Plus particulièrement, l'arête de coupure est formée par la bordure extérieure avant 21B1. L'arête de coupure permet d'empêcher l'émission de lumière par les premiers éléments d'éclairage 7 au-dessus de l'arête de coupure. Ceci permet avantageusement de réaliser la première fonction d'éclairage, c'est-à-dire la formation d'un premier faisceau lumineux, dit feux de route, pouvant être projeté depuis la lentille de projection 5. On comprendra que, lorsque la première fonction d'éclairage est réalisée, les premiers et les deuxièmes éléments d'éclairage 7, 8 sont utilisés.The cutting edge is advantageously formed by the
Lorsque la deuxième fonction d'éclairage du module lumineux 1 est souhaitée, l'émission de lumière émises par les deuxièmes éléments d'éclairage 8 est avantageusement projetée par la lentille de projection 5 pour former le deuxième faisceau lumineux, dit feux de croisement. On comprendra que, lorsque la deuxième fonction d'éclairage est réalisée, les premiers éléments d'éclairage 7 ne sont pas utilisés.When the second lighting function of the
Bien entendu, les caractéristiques, les variantes et les différentes formes de réalisation de l'invention peuvent être associées les unes avec les autres, selon diverses combinaisons, dans la mesure où elles ne sont pas incompatibles ou exclusives les unes des autres. On pourra notamment imaginer des variantes de l'invention ne comprenant qu'une sélection de caractéristiques décrites par la suite de manière isolée des autres caractéristiques décrites, si cette sélection de caractéristiques est suffisante pour conférer un avantage technique ou pour différencier l'invention par rapport à l'état de la technique.Of course, the features, variants and different embodiments of the invention can be associated with each other, in various combinations, in the to the extent that they are not incompatible or exclusive of each other. It will be possible to imagine variants of the invention comprising only a selection of characteristics subsequently described in isolation from the other characteristics described, if this selection of characteristics is sufficient to confer a technical advantage or to differentiate the invention compared in the state of the art.
Claims (15)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1762903A FR3075929B1 (en) | 2017-12-22 | 2017-12-22 | LIGHT MODULE FOR VEHICLES INCLUDING A VENTILATION DEVICE BETWEEN TWO HEAT DISSIPATING DEVICES |
Publications (2)
Publication Number | Publication Date |
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EP3502546A1 true EP3502546A1 (en) | 2019-06-26 |
EP3502546B1 EP3502546B1 (en) | 2023-07-12 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP18212726.6A Active EP3502546B1 (en) | 2017-12-22 | 2018-12-14 | Light module for a vehicle comprising a ventilation device arranged between two devices for heat dissipation |
Country Status (4)
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US (1) | US10738964B2 (en) |
EP (1) | EP3502546B1 (en) |
CN (1) | CN109973939B (en) |
FR (1) | FR3075929B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3103537A1 (en) * | 2019-11-21 | 2021-05-28 | Valeo Vision | Lighting device for motor vehicle |
Families Citing this family (1)
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CN115059600B (en) * | 2022-08-15 | 2022-12-09 | 宁波从越电子设备有限公司 | Vehicle-mounted inflator pump |
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US20070091632A1 (en) * | 2005-10-25 | 2007-04-26 | Visteon Global Technologies, Inc. | Convectively cooled headlamp assembly |
DE102007043961A1 (en) * | 2007-09-14 | 2009-03-19 | Automotive Lighting Reutlingen Gmbh | Illuminating device, has closed air passage provided with essentially horizontal extension, and conveying unit actively conveying air through air passage, and heat sink partially arranged in air stream that flows through air passage |
EP3173688A1 (en) * | 2014-07-23 | 2017-05-31 | Koito Manufacturing Co., Ltd. | Lighting fixture unit and headlamp for vehicle |
JP2017120736A (en) * | 2015-12-28 | 2017-07-06 | パナソニックIpマネジメント株式会社 | Headlight and movable body |
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CN201547566U (en) * | 2009-11-23 | 2010-08-11 | 北京星光影视设备科技股份有限公司 | LED light source component of zoom imaging light |
CN103453422B (en) * | 2013-08-30 | 2016-03-09 | 安徽湛蓝光电科技有限公司 | Automotive LED headlamp dipped beam optics module |
US10794561B2 (en) * | 2015-12-15 | 2020-10-06 | Koito Manufacturing Co., Ltd. | Vehicle lamp |
-
2017
- 2017-12-22 FR FR1762903A patent/FR3075929B1/en active Active
-
2018
- 2018-12-14 EP EP18212726.6A patent/EP3502546B1/en active Active
- 2018-12-21 CN CN201811578793.XA patent/CN109973939B/en active Active
- 2018-12-21 US US16/230,015 patent/US10738964B2/en active Active
Patent Citations (5)
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WO2005116522A1 (en) * | 2004-05-25 | 2005-12-08 | Hella Kgaa Hueck & Co. | Headlight with heat exchanger for cooling the lighting means |
US20070091632A1 (en) * | 2005-10-25 | 2007-04-26 | Visteon Global Technologies, Inc. | Convectively cooled headlamp assembly |
DE102007043961A1 (en) * | 2007-09-14 | 2009-03-19 | Automotive Lighting Reutlingen Gmbh | Illuminating device, has closed air passage provided with essentially horizontal extension, and conveying unit actively conveying air through air passage, and heat sink partially arranged in air stream that flows through air passage |
EP3173688A1 (en) * | 2014-07-23 | 2017-05-31 | Koito Manufacturing Co., Ltd. | Lighting fixture unit and headlamp for vehicle |
JP2017120736A (en) * | 2015-12-28 | 2017-07-06 | パナソニックIpマネジメント株式会社 | Headlight and movable body |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3103537A1 (en) * | 2019-11-21 | 2021-05-28 | Valeo Vision | Lighting device for motor vehicle |
Also Published As
Publication number | Publication date |
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FR3075929B1 (en) | 2021-01-29 |
US20190195463A1 (en) | 2019-06-27 |
CN109973939A (en) | 2019-07-05 |
CN109973939B (en) | 2021-09-28 |
EP3502546B1 (en) | 2023-07-12 |
US10738964B2 (en) | 2020-08-11 |
FR3075929A1 (en) | 2019-06-28 |
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