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  • 专利说明
  • 权利要求
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    • 专利摘要:
    A vehicle headlight (100), comprising a headlight housing (101), at least one light source (102), at least one projection optical system (104), at least one cooling channel (107) and a cooling medium. The at least one light source (102) is set up to emit light in the form of a light beam (105) in the direction of the at least one projection optics (104) and to form a light image on the road in front of the vehicle. The at least one light source (102) and the at least one projection optics (104) are located within the headlight housing (101). The at least one cooling channel (107) is thermally conductively connected to at least one heat source and the at least one cooling channel (107) is arranged to cool the heat source when the cooling medium flows through it. The at least one cooling passage (107) comprises at least one detachable connection coupling (108, 109) which is inserted into the cooling passage (107).
    公开号:AT519775A1
    申请号:T50245/2017
    申请日:2017-03-28
    公开日:2018-10-15
    发明作者:Mayer Matthias；Mitterlehner Stefan
    申请人:Zkw Group Gmbh；
    IPC主号:
    专利说明:

    VEHICLE HEADLIGHTS AND COOLING SYSTEM
    The invention relates to a vehicle headlight, comprising a headlight housing, at least one light source, at least one projection optics, at least one cooling channel and a cooling medium, wherein the at least one light source is arranged to emit light in the form of a light beam in the direction of the at least one projection optics and in front of the vehicle form a light image on the road, and the at least one light source and the at least one projection optics are located within the headlight housing, and the at least one cooling channel with at least one heat source which is within the
    Spotlight housing is located, is thermally conductively connected, and the at least one cooling channel is arranged to cool the at least one heat source when flowing through the cooling medium.
    Moreover, the invention relates to a cooling system comprising at least one cooling generator, a cooling medium and at least one cooling line.
    In the development of the current headlamp systems is increasingly the desire in the foreground to be able to project a high-resolution, homogeneous light image on the road. The term "roadway" is used here for a simplified representation, because of course it depends on the local conditions, whether a photograph is actually on the road or even beyond.
    In principle, the photograph in the sense used corresponds to a projection onto a vertical one
    Area in accordance with the relevant standards relating to automotive lighting technology.
    To meet this need, among other things, headlights have been developed in which a variably controllable reflector surface is formed from a plurality of micromirrors and a light emission generated by a light module in
    Direction of emission of the headlamp reflected. Such lighting devices are in
    Vehicle construction advantageous because of their very flexible lighting functions, since the illumination intensity can be controlled individually for different lighting areas and any lighting functions can be realized with different light distributions, such as a low beam light distribution, a cornering light distribution, a
    City light distribution, a motorway light distribution, a curve light
    Light distribution, a high beam light distribution or the image of glare-free high beam. For the micromirror arrangement, the so-called Digital Light Processing (DLP®) projection technology is used, in which images are generated by modulating a digital image onto a light beam. In this case, the light beam is divided into partial areas by a rectangular arrangement of movable micromirrors, also referred to as pixels, and then reflected pixelwise, either into the projection path or out of the projection path.
    The basis for this technique is an electronic component that contains the rectangular array in the form of a matrix of mirrors and their driving technique and is referred to as "Digital Micromirror Device" (DMD).
    In a DMD microsystem is a surface light modulator (Spatial Light Modulator, SLM), which consists of matrix-shaped micro-mirror actuators, that is tiltable reflective surfaces, for example, with an edge length of about 16 microns. The mirror surfaces are designed to be movable by the action of electrostatic fields. Each micromirror is individually adjustable in angle and usually has two stable end states, which can be changed within a second up to 5000 times. For example, the individual micromirrors can each be controlled by a pulse width modulation (PWM) in order to image further states of the micromirrors in the main beam direction of the DMD arrangement whose time-averaged reflectivity lies between the two stable states of the DMD. The number of mirrors corresponds to the resolution of the projected image, where a mirror can represent one or more pixels. Meanwhile, DMD chips with high resolutions in the megapixel range are available. The underlying technology for adjustable mirrors is Micro-Electro-Mechanical Systems (MEMS) technology. While the DMD technology has two stable mirror states, and by modulating between both stable states, the reflection factor can be set, the "Analog Micromirror Device" (AMD) technology has the property that the individual mirrors can be set in variable mirror positions. which are each in a stable state. However, DMD components are particularly sensitive to temperature fluctuations, which can be expressed on the one hand in an uneven reflection behavior of the individual mirrors, on the other hand can lead to a shortened life. Consequently, in the development of headlamps a corresponding cooling of the DMD component is an important aspect. This can be done by a suitable cooling of the DMD component, as well as in a corresponding dissipation of heat, for example, by the
    Light source is generated. A complex and precise cooling of a
    Vehicle headlamps often result in a large, needed from the headlamp
    Space and in accordance with high production costs. Both do not meet the commercial requirements for an effective headlight.
    It is an object of the invention to overcome the aforementioned disadvantages of the prior art, and to provide a vehicle headlamp with efficient cooling and also an efficient cooling system that meets the said requirements.
    The object is achieved by a vehicle headlamp of the type mentioned, wherein the at least one cooling channel comprises at least one releasable connection coupling, which is inserted into the cooling channel. This can be achieved that the
    Vehicle headlight may have a cooling device, wherein the production of a cold cooling medium is not carried out within the headlight, but by an external unit. Consequently, the vehicle headlight can be made smaller and less expensive. In addition, the generation of a cold cooling medium can be more effective and cheaper. This is particularly advantageous because at least two
    Vehicle headlights can use the same unit to produce a cold cooling medium. It is also possible to cool others
    Include components in a vehicle cooling system. By the detachable
    Connecting coupling, for example, a clampable or screwed
    Flange connection, a vehicle headlight can be easily installed and removed in a motor vehicle.
    This object of the invention is also achieved by a cooling system of the type mentioned, which additionally at least one vehicle headlamp according to the invention and at least one further unit to be cooled, in particular another vehicle headlamp invention or an accumulator unit of a
    Electric vehicle, which includes at least one accumulator cell and at least one AkkumulatorKühlanordnung includes, is coupled to the cooling system, and can be flowed through by the cooling medium. As a result, an existing, efficient vehicle cooling system can be used in addition to cool one or more vehicle headlights.
    It is clear that the more the individual headlights in one, the greater the benefit
    Vehicle to be integrated. In other words, it is advantageous if, for example, a plurality of headlights or a plurality of headlight pairs are used in separate headlight housings, for example for different light functions, and these multiple headlights use a common cooling system.
    In a particularly advantageous embodiment, the vehicle headlamp further comprises a micromirror arrangement, wherein the micromirror arrangement is inserted between the at least one light source and the at least one projection optical system in the beam path of the light beam, and the micromirror arrangement is set up, light emitted by the light source in the direction of the at least one projection optics to reflect, wherein the micro-mirror assembly is located within the headlight housing and the at least one heat source comprises the micromirror arrangement.
    In particular, micromirror arrangements in the form of optoelectronic components require a particularly reliable and precise temperature control, for example, the
    Life of the component not unfavorable influence. The vehicle headlight is therefore particularly well suited to provide such cooling.
    This also applies if the at least one heat source comprises the at least one light source, wherein the light source is designed as an LED, OLED or laser diode. A heat source in the form of an optical absorber is particularly well suited for this purpose, since these components generate a high heat loss. By such a vehicle headlight can thus be achieved that the waste heat to the outside of the
    Headlamps can be transported and therefore the headlamp can be made even smaller and cheaper. Thus, for example, several
    Headlight same unit to produce a cold cooling medium use or use the same cooling medium.
    In a favorable embodiment of the invention, the vehicle headlight further comprises a condenser for condensing water vapor, which is within the
    Headlight housing is located and connected to the cooling channel thermally conductive.
    This can be achieved that a transparent front window of the
    Vehicle headlamps do not need to be specially coated to fog the
    To prevent disc, which would adversely affect the optical function of the headlamp. Consequently, the air is dehumidified within the headlight housing.
    A capacitor can be a separate module, for example a separate heat sink, or a functional unit formed jointly with other headlight components, for example together with a heat sink of an electronic component of the headlight. A capacitor is a device whose
    Surface temperature is lower than the surface temperatures of adjacent
    Components or component areas. The capacitor may be formed by the
    Condenser in the cooling passage in the flow direction of the cooling medium as close as possible to the releasable connection coupling is arranged, and therefore has a lower temperature than the components to be cooled, which are arranged downstream in the cooling channel and have already submitted waste heat to the cooling medium.
    The condenser is located at least partially within the headlight housing and preferably at the cooling channel upstream of the light source.
    The condensate which forms on the condenser can preferably be replaced by a
    Drain drain opening.
    In one embodiment, the cooling medium is gaseous and preferably air, wherein at least a portion of the cooling medium within the vehicle headlight is removed by means of a branch from the cooling channel and the interior of the
    Headlight housing is supplied to generate within the headlight housing an atmospheric pressure over the pressure outside the vehicle headlight. The condensate that forms on the condenser and flows toward a pressure equalization valve or drainage port can thus be diverted out of the headlamp housing. By this embodiment, the efficiency of dehumidification can be improved within the headlight housing.
    In order to further improve the efficiency of the entire cooling system, the
    Vehicle headlights additionally comprise at least one throttle valve, which is within the
    Headlight housing or mounted on the headlight housing. This allows the
    Mounting the throttle valve can be facilitated by this is integrally integrated in the vehicle headlights.
    In a further development of the invention, the cooling system further comprises an electrical
    Control device and at least one throttle valve, wherein the at least one throttle valve and the at least one cooling channel is inserted into the cooling line. As a result, an efficient control of the cooling system can be achieved.
    The at least one throttle valve is arranged upstream of the at least one cooling channel, and the vehicle headlight further comprises at least one first temperature sensor, which is electrically connected to the electrical control device via at least one sensor line. The electrical control device is further configured to regulate the flow of the cooling medium through the vehicle headlight by means of the at least one throttle valve via at least one control line.
    This can be achieved that the inflow is controlled in the headlight and the other components on the cooling system, such as the accumulator unit can be better cooled.
    Preferably, the accumulator unit comprises at least a second one
    Temperature sensor, the at least one sensor line with the electrical
    Control device is electrically connected. The electrical control device is further configured to regulate the flow of the cooling medium through the accumulator unit by means of the at least one throttle valve via at least one control line. This allows an efficient control of the entire cooling system can be achieved.
    In a further development of the invention, the cooling medium is a fluid, preferably cooling water or oil. The at least one cooling line forms a closed cooling circuit with the at least one cooling generator.
    The cooling generator may, for example, a compressor, preferably the compressor of an air conditioner, which generates cold and mixed by means of a fan with a gaseous cooling medium or a pump with a fluid cooling medium, the cooled cooling medium in the cooling line in a flow movement. This can be achieved that particularly high amounts of heat are dissipated from the headlight and the headlamp can be made very small. In addition, you can
    Cost advantages arise. Often, a refrigeration generator includes an evaporator
    Expansion valve, a compressor, a condenser of the cooling generator, a filter or dryer and a condenser fan.
    It is clear in this context that a cooling generator can also be used to generate warm air, for example, to heat the connected components in winter at low outside temperatures. This can be done for example by arranged in the cooling line heating coils that are operated electrically.
    The invention and its advantages are described in more detail below with reference to non-limiting exemplary embodiments, which are illustrated in the accompanying drawings. The drawings show in
    1 is a block diagram of a first embodiment of a cooling system according to the invention with a vehicle headlamp according to the invention with a fluid cooling medium,
    Fig. 2 is a block diagram of a second embodiment of a cooling system according to the invention with a vehicle headlamp according to the invention with a gaseous cooling medium, and
    Fig. 3 is a block diagram of a third embodiment of a cooling system according to the invention with a vehicle headlamp according to the invention with a gaseous cooling medium.
    With reference to FIGS. 1 to 3, embodiments of the invention will now be explained in more detail with reference to schematic representations, wherein the arrangement shown does not correspond to the actual geometry. In particular, for the invention in one
    Headlight important parts shown, it being understood that a headlight still contains many other, not shown parts that allow a meaningful use in a motor vehicle, in particular a car or motorcycle. For clarity, therefore, for example, components, control electronics, other optical elements, mechanical adjustment devices or brackets are not shown.
    Fig. 1 shows a schematic representation of an inventive
    Vehicle headlight 100, the headlight housing 101, at least one
    Light source 102, at least one primary optics 103, at least one projection optics 104, a cooling channel 107 and a cooling medium comprises. Furthermore, a cooling system 10 according to the invention is shown.
    There are further embodiments of the invention are possible in which a plurality of cooling channels extend through a vehicle headlight, which are supplied for example via manifolds from a common cooling generator with a cooling medium.
    The cooling system 10 comprises at least one cooling generator 11, a cooling medium and at least one cooling line 12. In addition, at least two units to be cooled are included, which are supplied by the cooling system 10 together with a cooling medium. In this case, the at least two units to be cooled at least one inventive vehicle headlight, or even an accumulator unit 30 of a
    Electric vehicle, the at least one accumulator cell 32 and at least one
    Accumulator cooling arrangement comprises, be. Accordingly, it is clear that in multi-lane vehicles two or more headlamps 100 according to the invention may be included.
    Vehicle headlights according to the invention can be implemented in variants such as a high beam or dipped beam function, but also other light function, such as intelligent projectors, the dynamic traffic information or
    Project navigation information onto the roadway.
    The at least one light source 102 is arranged to receive light in the form of a light beam 105 in FIG
    Direction of at least one projection optics 104 to emit and in front of the vehicle
    Train light picture on the street. The projection optics 104 is in the direction of travel of
    Vehicle oriented.
    The cooling channel 107 is provided with at least one heat source, for example an electrical one
    Consumer or a heat sink, which is located within the headlight housing 101, thermally conductively connected. The cooling channel 107 is set up to cool the at least one heat source when flowing through the cooling medium.
    The cooling passage 107 further includes at least one releasable connection coupling 108, 109 inserted in the cooling passage 107. In this embodiment, two are detachable
    Connecting couplings 108, 109 shown.
    The vehicle headlight 100 further comprises a micromirror arrangement 110, wherein the
    Micro-mirror assembly 110 is inserted between the at least one light source 102 and the at least one projection optics 104 in the beam path of the light beam 105. The micromirror arrangement 110 is set up to reflect light emitted by the light source 102 in the direction of the at least one projection optics 104.
    Depending on the control of the micromirror arrangement 110, which is usually carried out by an electronic circuit (not shown), individual micromirrors of the
    Micromirror array 110 are driven such that light is reflected in the direction of the at least one first projection direction or alternatively reflected in another, second projection direction in which an optical absorber 111 is located, which converts the energy of the incident light into heat. The beam path 105 in the first projection direction is shown in FIG. 1 by a solid arrow and the
    Beam path 105, which is located in the second projection direction, from the
    Headlight 100 can exit through the transparent front glass 119 is shown with a dashed arrow.
    The micromirror arrangement 110 is located within the headlight housing 101 and the at least one heat source comprises the micromirror arrangement 110.
    The at least one heat source in this example comprises in the form of an electrical
    Power component, the at least one light source 102, which may be in particular an LED, an OLED or a laser diode, and an optical absorber 111. The at least one heat source may additionally each comprise a thermally conductive heat sink 112, 113, 114.
    In an advantageous development of the invention, the vehicle headlight 100 further comprises a condenser 115 for condensing water vapor. The capacitor 115 is located within the headlight housing 101 and is thermally conductively connected to the cooling channel 107. This can be achieved that the water content of the
    Air, which is included in the headlight housing 101, not on the transparent
    Windscreen 119 fogged and thus affects the optical function of the headlamp, but condensed on the capacitor 115, since this is a lower
    Temperature than the temperature of the transparent front panel 119 of the
    Headlamps, in turn, essentially due to the outside temperature outside the
    Vehicle is determined. This process is also referred to as condensation or resublimation. By this arrangement can be dispensed with an expensive special coating of the optically transparent front glass 119 of the headlamp 100, since the
    Condensation can take place largely on the capacitor 115 and not on the optically transparent front panel 119 of the headlight housing 101 or at others
    Components of the headlight 100, which contribute to its optical function, such as
    Light source 102, the primary optics 103, the projection optics 104 or the
    Micromirror arrangement 110.
    In a further development of the invention, as the cooling medium, a gas, for example
    Air, used that already has a very low moisture content. This can be achieved by using conditioned air generated, for example, by a refrigeration compressor as a refrigeration generator. It can thereby be achieved that the condensation or condensation of moisture within the vehicle headlight as a whole is reduced, since as a result less total moisture is present within the vehicle headlight.
    Preferably, the capacitor 115 is at least partially within the
    Headlight housing 101 and preferably located on the cooling channel 107 upstream of the light source 102.
    It can thereby be achieved that the cooling medium is passed to the condenser 115 immediately after it has entered the cooling channel 107, that is to say the point with the lowest temperature of the cooling medium within the headlight 100, and the
    Capacitor 115 has a particularly low temperature within the headlight 100, whereby the condenser 115 is particularly efficient and the water vapor can largely condense or resublimate at the condenser 115. The transition between gaseous and liquid state of water as a function of pressure and temperature is taken from the so-called phase diagram, such as
    Specialist known.
    By a corresponding embodiment of the vehicle headlight 100 it can be achieved that the condensate which forms on the condenser 115 can preferably run off through an outlet opening 116. For example, the drain opening 116 may be designed funnel-shaped and be located in the installed position below the condenser 115, whereby the condensate can drip off and drain. The cooling channel 107 may be partially surrounded by a thermal insulation in order to largely selectively absorb the generated cooling of the cooling medium in the cooling channel 107, the heat of the heat source or deliver the cold to the capacitor 115.
    It is advantageous if the vehicle headlight 100 additionally at least one
    Throttling valve 13 includes, within the headlight housing 101 or on the
    Headlight housing 101 is mounted. By such a throttle valve, the
    Flow of the cooling medium through the cooling channel 107 are regulated. If that
    Throttle valve 13 is integrally mounted with the headlight housing 101, the installation of both components is facilitated and additional fasteners can be saved.
    In Fig. 1, a cooling system 10 is additionally shown, which comprises at least one cooling generator 11, a cooling medium and at least one cooling line 12 and a
    Flow of the cooling medium in a flow direction 15 for supplying the heat sources in the headlight 100, such as the light source 102, the
    Micro-mirror assembly 110, the optical absorber 111 or the heat sink 112, 113, 114 and the components to be cooled, such as the capacitor 115, but also in the accumulator unit 30, the accumulator cells 32 generated.
    In addition, an accumulator unit 30 of an electric vehicle, the more
    Accumulator cells 32 and at least one accumulator cooling arrangement includes, shown, which is also coupled to the cooling system 10 and the cooling medium can be flowed through.
    By the combined generation of a cooled cooling medium by the cooling generator 11 for the vehicle headlight 100 and the accumulator unit 30 significant synergy effects can be used, whereby a total of less space and a cost-effective production can be achieved.
    The cooling system 10 further comprises an electric control device 20 and at least one
    Throttling valve 13, wherein the at least one throttle valve 13 and the at least one cooling passage 107 is inserted into the cooling line 12.
    The electrical control device 20 may be designed as a separate module, or just be a function of a complex control device, for example, another
    Performs control functions of the vehicle.
    The at least one throttle valve 13 is arranged upstream of the at least one cooling passage 107 in order to control the inflow into the headlight 100 or the
    Flow rate through the headlight 100 to regulate.
    The vehicle headlight 100 further comprises a first temperature sensor 106, which is electrically connected to the electrical control device 20 via at least one sensor line 21. Thereby, the temperature of the vehicle headlight 100 can be determined and the cooling performance can be adjusted. The electric
    Control device 20 is set up, by means of the at least one throttle valve 13 via at least one control line 23, 24, the flow of the cooling medium through the
    Vehicle headlight 100 to regulate. It is clear that the at least one
    Sensor line 21 may be formed for example by a vehicle bus, such as a CAN or LIN bus.
    In this embodiment, the accumulator unit 30 comprises at least a second temperature sensor 31, which via at least one sensor line 22 with the electrical
    Control device 20 is electrically connected. This can reduce the temperature of the
    Accumulator unit 30 can be determined and the cooling capacity can be adjusted thereon. It will be understood that each accumulator cell may include its own temperature sensor. The skilled person is also clear that the at least one sensor line 22 may be formed for example by a vehicle bus, such as a CAN or LIN bus. The same applies to the at least one control line 23, 24, 25.
    The electrical control device 20 is set up, by means of which at least one
    Throttle valve 14 via at least one control line 23, 25 to regulate the flow of the cooling medium through the accumulator unit 30.
    By sharing the electrical control device 20 for the cooling generator 11 through the vehicle headlight 100 and the accumulator unit 30 further synergy effects can be used, which further a smaller space and cost production can be achieved.
    It is favorable if the cooling medium is a fluid, preferably cooling water or oil, and the at least one cooling line 12 with the at least one cooling generator 11 forms a closed cooling circuit.
    The cooling generator 11 may comprise, for example, one or more heat exchangers (not shown) through which the traveling wind of the traveling vehicle flows and is thereby cooled. In addition, the cooling generator 11 may include a pump (not shown) for generating a flow in the flow direction 15 in the cooling pipe 12.
    FIG. 2 shows a further embodiment of a vehicle headlight 200 according to FIG
    Invention in which the cooling medium is gaseous and preferably air.
    At least part of the gaseous cooling medium can be inside the
    Vehicle headlights 200 are removed by means of a branch 217 from the cooling passage 207 and the interior of the headlight housing 201 are supplied. On the branch 217, a nozzle (not shown) may be attached, which directs the exiting flow of the cooling medium to a specific location, for example in the
    Range of the capacitor 215. It is clear that the cooling generator must be adapted to suck in air and supply the cooling line to the volume of the in
    Headlight 201 outflowing air to supply the cooling system 10 again. The
    Branch 217 may also be configured to create a flow of air in the headlamp housing 201 that reduces resublimation on the optical function components 202, 203, 204, or 210 of the headlamp 200, such as by dissipating heat (not shown) through a heat sink 214, flows toward the projection lens 204 or the transparent front glass 219. As a result, an atmospheric overpressure relative to the pressure outside the vehicle headlight 200 can be generated within a headlight housing 201.
    The transition between gaseous and liquid state of water as a function of pressure and temperature can be found in the so-called phase diagram, as known in the art. A higher pressure allows resublimation or condensation at a lower temperature. Thus, by a headlamp, which has an atmospheric pressure, a lighter or more efficient
    Dehumidification of the air can be achieved within the headlight.
    The condensate that forms on the condenser 215 may, for example, flow through a funnel-shaped shape toward a pressure compensation valve 218 and the
    Condensate may be drained out of the headlight housing 201 through the pressure balance valve 218. It is advantageous if the headlight housing 201 is carried out mainly tight and the pressure compensation mainly by the
    Pressure compensation valve 218 takes place, which also ensures that no moisture from the outside can get into the headlight housing 201. The pressure compensation valve 218 may alternatively be designed as a gas-permeable membrane.
    For example, the pressure compensation valve 218 in installation position below the
    Condenser 215 may be located, causing the condensate to drain and drain well.
    This can be achieved that the outflow of the condensate is facilitated and the
    Dehumidification of the air within the vehicle headlight is improved.
    Otherwise, the embodiments of FIG. 1 apply, wherein the reference numerals of the components of the headlamp 200 correspond to the numbers of the reference numbers of the headlamp 100 increased by the number 100.
    FIG. 3 shows a further embodiment of a vehicle headlight 300 according to FIG
    Invention in which the cooling medium is gaseous and preferably air.
    At least part of the gaseous cooling medium can be inside the
    Vehicle headlights 300 are removed from the cooling channel 307 by the cooling channel 307 has an open end, which is located in the interior of the headlight housing 301. A nozzle (not shown) may be provided on the open end of the cooling channel 307 directing the exiting flow of cooling medium to a particular location, such as the area of the condenser 315. It will be appreciated that the cooling generator must be configured to provide air suck and supply the cooling line to supply the volume of the outflowing in the headlight 301 air to the cooling system 10 again. The open end of the cooling channel 307 may also be configured, a
    To generate air flow in the headlight housing 301 that a Resublimation is reduced to the important components for the optical function 302, 303, 304 or 310 of the headlight 300, for example, by waste heat (not shown), which is discharged through a heat sink 314, in the direction of Projection lens 304 or the transparent windscreen 319 flows. As a result, within a headlight housing 301, an atmospheric pressure over the pressure outside of the
    Vehicle headlights 300 are generated.
    The condensate that forms on the condenser 315 may, for example, flow through a funnel-shaped shape towards a pressure compensation valve 318 and the
    Condensate may be discharged out of the headlamp housing 301 through the pressure compensating valve 318. It is advantageous if the headlight housing 301 is carried out mainly tight and the pressure compensation mainly by the
    Pressure equalization valve 318 takes place, which also ensures that no moisture from the outside can get into the headlight housing 301. The pressure compensation valve 318 may alternatively be designed as a gas-permeable membrane. In the simplest case, a simple opening at the location of the pressure compensation valve 318, which can also serve as a drain opening and through which the condensate can drain in the installed position of the headlamp.
    For example, the pressure compensation valve 318 in installation position below the
    Condenser 315 can be located, allowing the condensate drain and run well.
    This can be achieved that the outflow of the condensate is facilitated and the
    Dehumidification of the air within the vehicle headlight is improved.
    In this context, it is assumed that the open end of the cooling channel 307 can flow to a spot in the headlight 300, this point being referred to as
    Capacitor 315 is designated. This arrangement, in which the cooling medium from the cooling passage 307 preferably flows directed to the condenser 315, is functionally equivalent to a thermally conductive connection between the condenser 315 and the cooling passage 307.
    Otherwise, the embodiments of FIGS. 1 and 2, wherein the reference numerals of
    Components of the headlight 300 the numbers increased by the number 200
    Reference numerals of the headlamp 100 correspond.
    In this embodiment as well, the gaseous cooling medium entering the vehicle headlight can flow to a specific location, through which a capacitor can be formed, in order to detect the resublimation of the air in the headlight
    Force condenser. A favorable arrangement, for example, a plurality of heat sources, preferably in the installation position of the headlight vertically to each other, can support the function. As a result, a resublimation occurring at the components of the headlight which are important for the optical function can be reduced. An expensive anti-fog coating of the transparent windshield of the headlamp can be dispensed with.
    In connection with the embodiments shown, it is clear that the features of
    Claims can be combined with each other. So it is for example possible, the headlights shown 100, 200 or 300 with drain holes or valves or
    Depending on the particular requirements in the application of a
    Headlight. Likewise it is possible that different components within the
    Headlamps are cooled, even if they do not explicitly use a heat sink, but for example, are arranged on a circuit board by a suitable
    Coupling with the cooling channel is thermally coupled.
    REFERENCE NUMBER: 10 cooling system 11 cooling generator 12 cooling line 13, 14 throttle valve 15 flow direction 20 electrical control device 21, 22 sensor line 23, 24, 25 control line 30 accumulator unit 31 second temperature sensor 32 accumulator cell 100, 200, 300 vehicle headlight 101, 201, 301 headlight housing 102, 202, 302 light source 103, 203, 303 primary optics 104, 204, 304 projection optics 105, 205, 305 light beam 106, 206, 306 first temperature sensor 107, 207, 307 cooling channel 108, 109, 208, 209, 309 connection coupling 110, 210 , 310 micromirror arrangement 111, 211, 311 optical absorber 112, 113, 114, 212, 213, 214, 312, 313, 314 heat sink 115, 215, 315 condenser 116 drain opening 217 branch 218, 318 pressure compensation valve 119, 219, 319 windscreen
    权利要求:
    Claims (9)
    [1]
    1. A vehicle headlight (100, 200, 300), comprising a headlight housing (101, 201, 301), at least one light source (102, 202, 302), at least one projection optical system (104, 204, 304), at least one cooling channel (107, 207, 307) and a cooling medium, wherein the at least one light source (102, 202, 302) is arranged to emit light in the form of a light beam (105, 205, 305) in the direction of the at least one projection optics (104, 204, 304) and to form a light image on the road in front of the vehicle, and the at least one light source (102, 202, 302) and the at least one projection optics (104, 204, 304) are located within the headlight housing (101, 201, 301), and at least one cooling channel (107, 207, 307) having at least one heat source, which is located within the headlight housing (101, 201, 301), is thermally conductively connected, and the at least one cooling channel (107, 207, 307) is arranged at Flow through the cooling medium the at least one heat Cooling source, characterized in that the at least one cooling channel (107, 207, 307) at least one releasable connection coupling (108, 109, 208, 209, 309), which is inserted into the cooling channel (107, 207, 307).
    [2]
    2. A vehicle headlight (100, 200, 300) according to claim 1, characterized in that the vehicle headlight (100, 200, 300) further comprises a micromirror arrangement (110, 210, 310), wherein the micromirror arrangement (110, 210, 310) between the at least one light source (102, 202, 302) and the at least one projection optics (104, 204, 304) are inserted into the beam path of the light beam (105, 205, 305), and the micromirror arrangement (110, 210, 310) is set up to reflect light emitted from the light source (102, 202, 302) toward the at least one projection optic (104, 204, 304), the micromirror assembly (110, 210, 310) located within the spotlight housing (101, 201, 301) and the at least one heat source comprises the micromirror arrangement (110, 210, 310).
    [3]
    3. Vehicle headlight (100, 200, 300) according to claim 1 or 2, characterized in that the at least one heat source, the at least one light source (102, 202, 302), in particular an LED, an OLED or a laser diode, or a optical absorber (111, 211, 311).
    [4]
    4. Vehicle headlight (100, 200, 300) according to one of claims 1 to 3, characterized in that the vehicle headlight (100, 200, 300) further comprises a condenser (115, 215, 315) for the condensation of water vapor, which is within the Headlight housing (101, 201, 301) is located and with the cooling channel (107, 207, 307) is thermally conductively connected, wherein the capacitor (115, 215, 315) located at least partially within the headlight housing (101, 201, 301) and preferably located on the cooling passage (107, 207, 307) upstream of the light source (102, 202, 302), and the condensate forming on the condenser (115, 215, 315) preferably drains through a drain port (116) can.
    [5]
    5. Vehicle headlight (200) according to claim 4, characterized in that the cooling medium is gaseous, preferably air, wherein at least a portion of the cooling medium within the vehicle headlamp (200) by means of a branch (217) from the cooling channel (207) is removed and the Interior of the headlight housing (201) is supplied to within the headlight housing (201) to generate an atmospheric pressure over the pressure outside the vehicle headlight (200) and the condensate that forms on the condenser (215) and to a pressure compensation valve (218) or a drain opening flows through which / which the condensate from the headlamp housing (201) can be derived out.
    [6]
    6. Vehicle headlight (100, 200, 300) according to one of claims 1 to 5, characterized in that the vehicle headlight (100, 200, 300) additionally comprises at least one throttle valve (13), which within the headlight housing (101, 201, 301 ) or on the headlight housing (101, 201, 301) is mounted.
    [7]
    7. Cooling system (10) comprising at least one cooling generator (11), a cooling medium and at least one cooling line (12), characterized in that in addition at least one vehicle headlight (100, 200, 300) according to one of claims 1 to 6 and at least a further unit to be cooled, in particular a further vehicle headlight (100, 200, 300) according to one of claims 1 to 6 or an accumulator unit (30) of an electric vehicle, the at least one accumulator cell (32) and at least one accumulator cooling arrangement includes, is included and coupled to the cooling system (10) and can flow through the cooling medium.
    [8]
    8. Cooling system (10) according to claim 7, characterized in that the cooling system (10) further comprises an electric control device (20) and at least one throttle valve (13), wherein the at least one throttle valve (13) and the at least one cooling channel (107 , 207, 307) is inserted into the cooling line (12), wherein the at least one throttle valve (13) upstream of the at least one cooling channel (107, 207, 307) is arranged and the vehicle headlamp (100, 200, 300) further at least a first Temperature sensor (106, 206, 306), which is electrically connected via at least one sensor line (21) to the electrical control device (20), and the electrical control device (20) is arranged, by means of the at least one throttle valve (13) via at least one Control line (23, 24) to regulate the flow of the cooling medium through the vehicle headlight (100, 200, 300), and preferably the accumulator unit (30) at least one second temperature sensor (31) comprises, which is electrically connected via at least one sensor line (22) to the electrical control device (20), and the electrical control device (20) is arranged by means of the at least one throttle valve (14) via at least one control line (23, 25) the flow of the cooling medium through the accumulator unit (30) to regulate.
    [9]
    9. Cooling system (10) according to any one of claims 7 or 8, characterized in that the cooling medium is a fluid, preferably cooling water or oil, and the at least one cooling line (12) with the at least one cooling generator (11) forms a closed cooling circuit.
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    同族专利:
    公开号 | 公开日
    AT519775B1|2018-12-15|
    CN108662548A|2018-10-16|
    EP3382268B1|2021-09-01|
    EP3382268A1|2018-10-03|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE102010022856A1|2010-06-07|2011-12-08|Mercury Lighting Ltd.|Lighting device has multiple lamps, where each lamp has housing and diode emitting light in environment by upper surface of housing|
    CN203258540U|2013-04-18|2013-10-30|重庆桑耐美光电科技有限公司|Circulating water cooling type light emitting diode car lamp|
    CN103807719A|2014-02-25|2014-05-21|钱晓明|Liquid-cooled LED headlamp for means of transportation|
    DE10213680A1|2002-03-27|2003-10-09|Hella Kg Hueck & Co|Vehicle headlamp with cooling, includes condenser in headlamp housing, with interceptor and drain for condensate formed|
    US7384152B2|2004-04-22|2008-06-10|Nec Viewtechnology, Ltd.|Liquid-cooled projector|
    FR2950674B1|2009-09-30|2012-08-31|Valeo Vision|LIGHTING AND / OR SIGNALING DEVICE FOR MOTOR VEHICLE|
    TW201204994A|2010-07-30|2012-02-01|Microbase Technology Corp|Lighting device, cooling/heat dissipating system and its cooling module|
    AU2010364563A1|2010-11-23|2013-05-23|Mass Technology Limited|Heat conducting lamp base and LED lamp including the same|
    DE102011120123A1|2011-12-03|2013-06-06|Gm Global Technology Operations, Llc|LED-headlight i.e. front headlight, for use in motor car, has light source arranged on printed circuit board that is arranged in housing, where areas of cooling body stay in contact with liquid cooling medium provided in container|
    DE102016203397A1|2016-03-02|2017-09-07|Volkswagen Aktiengesellschaft|Method for ventilating a lighting device for the exterior lighting of a motor vehicle and motor vehicle for carrying out the method|DE102018107678A1|2018-03-29|2019-10-02|Automotive Lighting Reutlingen Gmbh|Micro-mirror having light module for a motor vehicle headlight|
    DE102019123063A1|2019-08-28|2021-03-04|Automotive Lighting Reutlingen Gmbh|Composite of a motor vehicle headlight and a coolant circuit of a motor vehicle|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50245/2017A|AT519775B1|2017-03-28|2017-03-28|Vehicle headlight and cooling system|ATA50245/2017A| AT519775B1|2017-03-28|2017-03-28|Vehicle headlight and cooling system|
    EP18161148.4A| EP3382268B1|2017-03-28|2018-03-12|Vehicle headlight and cooling system|
    CN201810263750.6A| CN108662548A|2017-03-28|2018-03-28|Headlight for vehicle and cooling system|
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