• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a lighting device (10) for a motor vehicle comprising: - structural elements (1, 11) including a housing (1); - At least one light module (2) housed inside said housing (1), comprising at least one light source cooperating with an optical surface, said light module being equipped with a heat sink (3a, 3b, 3c) ; - a generator of an air flow (5); and - a single air duct (7) adapted to cooperate with said air flow generator (5) so as to convey said generated air flow to the heat sink (3) of said at least one light module (2 ), said air duct (7) being formed by: - an open portion (9) attached in the housing (1); and - at least one closure structural element (1, 11) adapted to close all or part of said attached portion (9).
    公开号:FR3048487A1
    申请号:FR1651749
    申请日:2016-03-02
    公开日:2017-09-08
    发明作者:Hugo Mestre；Pedro Zambrana；Isidro Garcia；Rafael Martinez
    申请人:Valeo Vision SA；
    IPC主号:
    专利说明:

    LIGHTING DEVICE FOR A MOTOR VEHICLE COMPRISING COOLING LIGHT MODULES USING A GENERATOR OF AN AIR FLOW
    TECHNICAL FIELD OF THE INVENTION
    The present invention relates to a lighting device for a motor vehicle.
    It finds a particular but non-limiting application in lighting devices, such as motor vehicle headlamps.
    BACKGROUND OF THE INVENTION
    A lighting device for a motor vehicle, such as a projector, comprises, in a manner known to those skilled in the art: a plurality of light modules housed inside a housing, comprising at least one light source cooperating with an optical system, said light modules each being equipped with a heat sink; - a generator of an air flow; at least one air duct adapted to cooperate with said airflow generator so as to convey said stream of generated air to the heat sink of a light module.
    An air duct is a part completely attached in the housing. This is installed by an operator between the airflow generator and a heat sink. There are as many ducts as light modules to cool.
    A disadvantage of this state of the art is that the number of air ducts depends on the number of light modules to be cooled. This results in a significant bulk of the ducts in the lighting device and consequent manufacturing costs of this lighting device.
    In this context, the present invention aims to solve the aforementioned drawbacks.
    GENERAL DESCRIPTION OF THE INVENTION For this purpose the invention proposes a lighting device for a motor vehicle, said lighting device comprising: structural elements including a housing; - At least one light module housed inside said housing, comprising at least one light source cooperating with an optical system, said light module being equipped with a heat sink; at least one generator of an air flow; and at least one single air duct adapted to cooperate with said airflow generator so as to convey said stream of generated air to the heat sink of said at least one light module, said air duct being formed by: - an open part reported in the case; and - at least one closure structural element adapted to close all or part of said reported open portion.
    Thus, as will be seen in detail below, using a duct forming a single assembly, it limits the size of this assembly in the lighting device. In addition, the conduit is formed by an open portion external to the lighting device and reported therein and by a structural closure member internal to the lighting device. The internal structural element is thus adapted to receive the outer open portion of the conduit. The manufacture of this conduit is therefore more economical because an element thereof is already existing in the lighting device. This reduces the manufacturing costs of this lighting device.
    According to non-limiting embodiments, the lighting device may further comprise one or more additional characteristics among the following:
    In a non-limiting embodiment, the closure structural element is an optical block disposed in said housing and adapted to receive said at least one light module.
    In a non-limiting embodiment, the closure structural element is said housing.
    In a non-limiting embodiment, the attached portion of the air duct is fixed by fastening means to the closure structural member.
    In a non-limiting embodiment, the fastening means are latching means or gluing means or screwing means.
    In a non-limiting embodiment, the air flow generator comprises an air outlet and the air duct is connected directly to this air outlet.
    In a non-limiting embodiment, the air duct extends into the lighting device from the air flow generator and in a substantially longitudinal direction.
    In a non-limiting embodiment, the lighting device comprises a series of N light modules and in which the air duct is divided into N air sub-ducts, each sub duct supplying air respectively a light module. of the series of N light modules.
    In a non-limiting embodiment, the air duct comprises at least one outlet which opens directly on the heat sink of said at least one light module.
    In a non-limiting embodiment, said outlet of the air duct has a closed section.
    In a non-limiting embodiment, the air sub-duct which supplies the most distant light module of the air flow generator with air has an outlet which is closed directly by the housing.
    In a non-limiting embodiment, the output of said sub-air duct is divided into a plurality of channels.
    In a non-limiting embodiment, the light source is a semiconductor emitter chip.
    In a non-limiting embodiment, the structural element forming a portion of the air duct is made of plastic.
    In a non-limiting embodiment, the lighting device is a projector.
    BRIEF DESCRIPTION OF THE FIGURES The invention and its various applications will be better understood on reading the description which follows and on examining the figures that accompany it. - Figure 1 shows a lighting device for a motor vehicle comprising a plurality of light modules according to a non-limiting embodiment of the invention; - Figure 2 shows a first structural element of the housing lighting device, said housing being adapted to be fixed in the motor vehicle; - Figure 3 shows an optical unit of the lighting device, the optical unit being adapted to be housed in the housing; - Figure 4 shows an open portion of an air duct of the lighting device of Figure 1 adapted to be closed by at least one structural element of the lighting device; FIG. 5 represents the open part of the air duct of FIG. 4 which cooperates with an air flow generator; Figure 6 is a bottom view of the reported open portion of the air duct of Figure 4 which cooperates with a plurality of heat sinks; FIG. 7 illustrates the open part of the air duct of FIGS. 4 to 6 housed in an optical block of FIG. 3, the whole being integrated into the casing of FIG. 2; - Figure 8 shows a sectional view of the air duct of Figure 7 made in the length of this air duct; - Figure 9 shows a sectional view A-A of the duct of Figure 7 made at the air outlet of the air flow generator; - Figure 10 shows a sectional view B-B of the duct of Figure 7; and FIG. 11 represents a sectional view C-C of the duct of FIG. 7.
    DESCRIPTION OF EMBODIMENTS OF THE INVENTION
    Identical elements, structure or function, appearing in different figures retain, unless otherwise specified, the same references.
    The lighting device 10 for a motor vehicle according to the invention is described with reference to FIGS. 1 to 11.
    By motor vehicle, we mean any type of motorized vehicle.
    In a non-limiting example taken in the remainder of the description, the lighting device 10 is a projector.
    The lighting device 10 comprises: structural elements 1,11 including a housing 1; at least one light module 2 housed inside said housing 1; a generator of an air flow 5; and a single air duct 7 adapted to cooperate with said air flow generator 5.
    In a non-limiting embodiment, the lighting device 10 comprises a plurality of light modules 2. In the non-limiting example illustrated, the lighting device 10 comprises three light modules 2.
    A light module 2 comprises: at least one light source (not shown) cooperating with an optical surface and; an optical surface (not shown). In a non-limiting embodiment, the optical surface is a reflector and / or a lens.
    The light modules 2 are adapted to emit a light beam to perform at least one photometric function.
    In non-limiting embodiments, the photometric function is: a so-called "low beam" function for producing a dipped beam; - a function called "high beam" to achieve a high beam. - A function called "fog" to achieve a fog lamp. - A function called DRL ("Daytime Running Lamp" in English) to make a daytime running light.
    In a non-limiting embodiment, the light source is a semiconductor emitter chip.
    In a non-limiting embodiment, a semiconductor emitter chip is part of a light emitting diode. Light-emitting diode means any type of light-emitting diode, whether in non-limiting examples of LEDs ("Light Emitting Diode"), OLEDs ("organic LEDs"), AMOLEDs (Active-Matrix-Organic LEDs), or FOLED (Flexible OLED).
    The light modules 2 are housed in the lighting device 10 by means of structural elements 1, 11. Among these structural elements, there is a housing 1 (illustrated in FIG. 2) and an optical unit 11 (illustrated in FIG. 3) housed in the housing 1.
    Figure 2 shows in more detail the housing 1 of the lighting device 10. This housing 1 is in the general form of a shell defining an interior volume in which the light modules 2 are housed.
    The housing 1 also has fastening flanges 14 for fixing it in the motor vehicle by means of fixing screws (not shown in FIG. 2).
    The housing 1 is adapted to receive an optical block 11. In a non-limiting embodiment, the optical unit 11 is fixed in the housing by means of four fixing screws 12 as illustrated in FIG.
    Figure 3 shows the optical unit 11 adapted to be housed in the housing 1. In a non-limiting embodiment, the optical unit 11 is made of plastic.
    It comprises in particular a ramp 16. This ramp 16 is in the form of an elongated element generally flat and slightly inclined. The ramp 16 extends in a longitudinal direction X to the optical unit 11.
    The optical unit 11 also includes portions 21a ', 21b', 21c. The ramp 16 and the portions 21a ', 21b', 21c are adapted to receive an open portion 9 of an air duct 7 attached to the housing 1. This open open portion 9 rests on the ramp 16 on which it is hung . The open open portion 9 is thus closed by the optical unit 11, namely the ramp 16 and the portions 21a ', 21b', 21c of the optical unit 11.
    The open portion 9 is illustrated in FIG. 4. In this FIG. 4, the open open portion 9 is in the form of an elongated portion complementary to the ramp 16 and to the portions 21a ', 21b', 21c 'of the block optical 11 to form a single air duct 7. The single air duct 7 is thus formed by: - an open portion reported 9 reported in the housing 1; and - at least one closure structural element 1,11 adapted to close all or part of said attached portion 9.
    In a non-limiting embodiment illustrated in FIG. 3, the closure structural element is the optical block 11. In this case, the optical block 11 is adapted to close all the open open portion 9.
    The air duct 7 is adapted to cooperate with an air flow generator 5 and at least one heat sink so as to allow the transfer of the air flow of the air flow generator 5 to the heat sink. .
    FIG. 5 illustrates the open open portion 9 of the air duct 7 which cooperates with the air flow generator 5. By "air flow generator" is meant a fan adapted to stir a certain volume of air in order to force the passage of this volume of air into the air duct 7.
    In the non-limiting embodiment illustrated in FIG. 5, the air flow generator 5 comprises an air outlet 15 and the air duct 7 is connected directly to this air outlet 15. Thus, it There is no pressure drop between the air flow generator 5 and the air duct 7.
    It will be noted that the air flow generator 5 is here fixed by fastening screws 20 (illustrated in FIG. 9) on a complementary structural element 22, visible in FIG. 3. This complementary structural element 22 notably comprises an orifice of fixing 24 to receive one of the fixing screws 20 of the air flow generator 5.
    FIG. 6 illustrates the open open portion 9 of the air duct 7. This open open portion 9 is here open on a lower zone which will come into cooperation with the ramp 16 of the optical block 11. The open open portion 9 is also open. on lateral zones 21a ", 21b", 21c "which will come into cooperation with parts 21a ', 21b', 21c of the optical unit 11 so as to form outlets 21a, 21b, 21c of the air duct 7.
    The air duct 7 is connected to three heat sinks 3a, 3b, 3c. Each heat sink 3a, 3b, 3c is associated with a light module 2. Each heat sink is thus adapted to evacuate the heat generated by operation by this light module 2. For this, each heat sink 3a, 3b, 3c comprises fins allowing a heat exchange with the air flow generated by the air flow generator 15. The air flow scans the fins forced passage, which allows optimal cooling of the dissipators 3a, 3b, 3c.
    It will also be noted that the heat dissipaters 3a, 3b, 3c are adapted to be fixed on blistered portions 18a, 18b, 18c of the optical unit 11, as illustrated in FIGS. 3, 7. These blistered portions 18a, 18b, 18c allow to strengthen the structure of the optical unit 11. In a non-limiting embodiment, these cellular parts 18a, 18b, 18c are made of plastic. In a non-limiting example, the plastic is polypropylene with 20% fiberglass (known as PP-GF20).
    In a non-limiting embodiment, the open open portion 9 comprises fastening means adapted to fix it to a structural closure member, here the optical unit 11.
    In a non-limiting embodiment variant, the fastening means comprise first fastening means 13a (illustrated in FIG. 4) complementary to second fastening means 13b (illustrated in FIG. 3) belonging to the ramp 16 of the optical unit 11. The first fastening means 13a are here in the form of notches and the second fastening means 13b are, in a non-limiting embodiment, elastically deformable members. In a non-limiting variant embodiment, the second fastening means 13b are snap-fastening means adapted to be inserted into said slots 13a. In a non-limiting example, these latching means 13b are here clips.
    The air duct 7 is assembled according to the following assembly method: - it is positioned the reported open portion 9 on the ramp 16 so as to position the notches 13a next to the clips 13b. in this position, a force perpendicular to the transverse direction X is applied to the open portion 9 so that the clips 13b are housed in the notches 13a;
    The open open portion 9 is thus attached to the ramp 16 and the air duct 7 is formed.
    In another non-limiting embodiment, the fixing means are gluing means.
    In another non-limiting embodiment, the fastening means are screwing means.
    FIG. 7 illustrates a lighting device 10 in which the air duct 7 is integrated. This air duct 7 is connected directly to the air outlet 15 of the air flow generator 5.
    In a non-limiting embodiment, the air duct 7 comprises at least one outlet that opens directly onto the heat sink of a light module 2. In a non-limiting embodiment, said at least one output of the duct air 7 has a closed section. The section is formed by the open open portion of the air duct 7 (and in particular an open lateral zone 21a ", 21b", 21c ") and the closure structural element, here the optical block 11 (and in particular a part 21 a ', 21b', 21c ').
    In the nonlimiting example illustrated in Figure 7, the air duct 7 has three outlets 21a, 21b, 21c which open directly to three heat sinks 3a, 3b, 3c.
    In a non-limiting embodiment, the lighting device 10 comprises a series of N light modules 2, here three in the non-limiting example illustrated, and the air duct 7 is divided into N air ducts. 17a, 17b, 17c, each subcircuit supplying air respectively a light module 2 of the series of N light modules.
    Figure 8 is a sectional view of the air duct 7 of Figure 7 made in the length of the air duct. This sectional view shows that the air duct 7 is divided into 3 sub-ducts 17a, 17b, 17c. Each sub-conduit 17a, 17b, 17c is adapted to supply airflow directly to a heat sink 3a, 3b, 3c via one of the outputs 21a, 21b, 21c. The heat sinks 3a, 3b, 3c are thus connected in series along the air duct 7.
    FIG. 9 is a sectional view AA of the air duct of FIG. 7 made at the air outlet 15 of the air flow generator 5. In this sectional view AA, the air duct 7 is formed by the open open portion 9 and by the closure structural element 11, here the optical block 11,
    The air duct 7 comprises the three sub-ducts 17a, 17b, 17c which have substantially the same passage section in a non-limiting embodiment. Thus, the air flow created by the air flow generator 5 is divided equally between the three sub-ducts 17a, 17b, 17c. The three sub-ducts 17a, 17b, 17c will convey the flow of air to the three outlets 21a, 21b, 21c of the air duct 7 to cool the three light modules 2 via their associated heat sink 3a, 3b and 3c.
    FIG. 10 is a sectional view BB of the air duct of FIG. 7 made after the air supply of the first heat sink 3a, that is to say after the heatsink closest to the generator of the heat flow. 5. In this sectional view BB, the air duct 7 comprises only the two sub-ducts 17b, 17c which will convey the flow of air to the two outlets 21b, 21c of the air duct 7 to cool the two light modules furthest from the air flow generator 5. The sub-duct 17a is not visible in this section BB because this section is downstream of the first light module 2.
    FIG. 11 is a view in section CC of the air duct of FIG. 7 made at the outlet 21C of this duct, namely at the level of the third heat sink 3c furthest from the air flow generator 5 .
    The section of this outlet 21C is closed and the air duct 7 is delimited by the lateral zone 21c "and by the optical block 1, in particular the portion 21c '. At this level, this air duct 7 then comprises only one duct 17c adapted to supply air to the third heat sink 3c.
    In a non-limiting embodiment, the sub-conduit 17c is here divided into a plurality of channels 23a, 23b, 23c. The use of several channels at this output 21c allows a more uniform scan of the fins of the last heat sink 3c. The action of the channels for the flow guidance is thus limited to the level of the output 21c. There is therefore a good distinction between the sub-term and the term channel. Indeed, a sub-conduit starts at the outlet 15 of the air flow generator 5 and conveys a flow of air to a heat sink 3a, 3b, 3c. A channel begins at the end of a sub-duct closest to a heat sink to evenly distribute the airflow in the fins of a heat sink.
    Of course, the description of the invention is not limited to the embodiments described above.
    Thus, in a non-limiting embodiment, each subchannel comprises a plurality of channels at a corresponding output. Thus, in a non-limiting embodiment, the lighting device may comprise more than three light modules and therefore more than three sub-ducts supplying air to these light modules.
    Thus, in another non-limiting embodiment, the closure structural element is only the housing 1. In this case, there is no optical block 11.
    Thus, in another non-limiting embodiment, the air duct 7 is formed by the open open portion 9 and by two structural closure members, namely the optical unit 11 and the housing 1. In this case, for example the portion 21c 'belongs to the housing 1 and no longer to the optical block 11. In this case each closure structural element 1 and 11 is adapted to close a part of the open part reported 9.
    Thus, the described invention has the following advantages in particular: the duct is delimited in part by a structural element of the lighting device. The duct production cost is thus lower because less material is used to make the duct; the integration of the part of the reported duct is facilitated. Indeed, this portion of conduit fits exactly to the structural element of the complementary housing; - Fixing the reported portion of the conduit by simple fastening means allows easy installation and handling of this reported part in the housing; - The duct comprises a plurality of sub-ducts, each sub duct being adapted to supply air flow a heat sink. Thus, from a single conduit it is possible to cool several light modules. The overall bulk of the conduit in the housing is then limited and it is avoided to induce a gene for access to the other functional organs of the lighting device housed inside the housing, such as the light modules.
    权利要求:
    Claims (15)
    [1" id="c-fr-0001]
    A lighting device for a motor vehicle, said lighting device (10) comprising: - structural elements (1, 11) including a housing (1); - At least one light module (2) housed inside said housing (1), comprising at least one light source cooperating with an optical surface, said light module being equipped with a heat sink (3a, 3b, 3c) ; - a generator of an air flow (5); and - a single air duct (7) adapted to cooperate with said air flow generator (5) so as to convey said generated air flow to the heat sink (3) of said at least one light module (2 ), said air duct (7) being formed by: - an open portion (9) attached in the housing (1); and - at least one closure structural element (1, 11) adapted to close all or part of said reported open portion (9).
    [2" id="c-fr-0002]
    2. Lighting device according to claim 1, wherein the structural closure member (1, 11) is an optical block (11) disposed in said housing (1) and adapted to receive said at least one light module.
    [3" id="c-fr-0003]
    3. Lighting device according to claim 1 or claim 2, wherein the structural closure element (1, 11) is said housing (1).
    [4" id="c-fr-0004]
    4. Lighting device according to any one of the preceding claims 1 to 3, wherein the attached portion (9) of the air duct is fixed by fastening means (13a, 13b) to the structural closure element. (1, 11).
    [5" id="c-fr-0005]
    5. Lighting device according to the preceding claim 4, wherein the fastening means (13a, 13b) are: - latching means; or - gluing means; or - screwing means.
    [6" id="c-fr-0006]
    6. Lighting device according to any one of the preceding claims 1 to 5, wherein the air flow generator (5) comprises an air outlet (15) and the air duct (7) is connected. directly on this air outlet (15).
    [7" id="c-fr-0007]
    Lighting device according to one of the preceding claims 1 to 6, in which the air duct (7) extends into the lighting device (10) from the air flow generator ( 5) and in a substantially longitudinal direction (X).
    [8" id="c-fr-0008]
    8. Lighting device according to any one of the preceding claims 1 to 7, wherein the lighting device (10) comprises a series of N light modules (2) and wherein the air duct (7) is divided into N air sub-ducts (17a, 17b, 17c), each sub-duct respectively supplying air to a light module (2) of the series of N light modules.
    [9" id="c-fr-0009]
    9. Lighting device according to any one of claims 1 to 8, wherein the air duct (7) comprises at least one outlet (21a, 21b, 21c) which opens directly on the heat sink (3a , 3b, 3c) of said at least one light module (2).
    [10" id="c-fr-0010]
    10. Lighting device according to claim 9, wherein said outlet (21a, 21b, 21c) of the air duct (7) has a closed section.
    [11" id="c-fr-0011]
    11 .Dispositif lighting according to any of the preceding claims 8 to 10, wherein the air sub-conduit (17c) which supplies air to the remote light module of the air flow generator (5) has an output (21c) which is closed directly by the housing (1).
    [12" id="c-fr-0012]
    12. Device according to the preceding claim 11, wherein the outlet (21c) of said air sub-duct (17c) is divided into a plurality of channels (23a, 23b, 23c).
    [13" id="c-fr-0013]
    13. Lighting device according to any one of claims 1 to 12, wherein the light source is a semiconductor emitter chip.
    [14" id="c-fr-0014]
    14. Lighting device according to any one of claims 1 to 13, wherein the structural element (1, 11) forming a portion of the air duct (7) is made of plastic.
    [15" id="c-fr-0015]
    15. Lighting device according to any one of claims 1 to 14, wherein the lighting device (10) is a projector.
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    同族专利:
    公开号 | 公开日
    FR3048487B1|2019-05-24|
    US10288251B2|2019-05-14|
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    法律状态:
    2017-03-31| PLFP| Fee payment|Year of fee payment: 2 |
    2017-09-08| PLSC| Search report ready|Effective date: 20170908 |
    2018-03-29| PLFP| Fee payment|Year of fee payment: 3 |
    2019-03-29| PLFP| Fee payment|Year of fee payment: 4 |
    2020-03-31| PLFP| Fee payment|Year of fee payment: 5 |
    2021-03-30| PLFP| Fee payment|Year of fee payment: 6 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1651749|2016-03-02|
    FR1651749A|FR3048487B1|2016-03-02|2016-03-02|LIGHTING DEVICE FOR A MOTOR VEHICLE COMPRISING COOLING LIGHT MODULES USING A GENERATOR OF AN AIR FLOW|FR1651749A| FR3048487B1|2016-03-02|2016-03-02|LIGHTING DEVICE FOR A MOTOR VEHICLE COMPRISING COOLING LIGHT MODULES USING A GENERATOR OF AN AIR FLOW|
    EP17157627.5A| EP3214363A1|2016-03-02|2017-02-23|Lighting device for motor vehicle comprising light units cooled by means of an air flow generator|
    US15/446,106| US10288251B2|2016-03-02|2017-03-01|Motor vehicle lighting device comprising light modules cooled by means of a generator of an air flow|
    CN201710120030.XA| CN107152647B|2016-03-02|2017-03-02|Motor vehicle lighting device comprising a light module cooled by means of an air flow generator|
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