EP4423428A1 - Kühlmodul und scheinwerfer - Google Patents
Kühlmodul und scheinwerferInfo
- Publication number
- EP4423428A1 EP4423428A1 EP22783517.0A EP22783517A EP4423428A1 EP 4423428 A1 EP4423428 A1 EP 4423428A1 EP 22783517 A EP22783517 A EP 22783517A EP 4423428 A1 EP4423428 A1 EP 4423428A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooling
- heat
- headlight
- cooling module
- fan
- 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.)
- Pending
Links
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
- F21S45/40—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
- 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
- F21S41/2805—Cover glass
-
- 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
- F21S45/435—Forced cooling using gas circulating the gas within a closed system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/60—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air
- F21V29/67—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by the arrangement of fans
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/60—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air
- F21V29/67—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by the arrangement of fans
- F21V29/677—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by the arrangement of fans the fans being used for discharging
-
- 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
- F21S45/50—Waterproofing
Definitions
- the invention relates to a cooling module with a cooling element according to the type defined in more detail in the preamble of claim 1.
- the invention also relates to a headlight with such a cooling module, in particular for a motor vehicle.
- Modern headlights have many internal components that emit heat during operation. In addition to the LEDs typically used today as light sources, these are stepper motors and control units. Due to the sometimes very high currents, heat is also generated in the area of the lines and contacts due to the electrical resistance of the cabling. In order to avoid overheating of the typically self-contained interior volume of the headlight, since this would force a power reduction or could even cause component damage, this waste heat must be dissipated from the interior volume of the headlight. Typically, the heat is transported via the cover pane, which is also referred to as the front pane or cover glass.
- the plastic housing of the headlamp itself also contributes to the heat transfer, but the materials used and the typical installation location with relatively small distances to surrounding components limit the efficient heat transfer. As a result, only a small part of the waste heat can be dissipated via the housing, for example into the engine compartment of the vehicle.
- One approach to improve the dissipation of waste heat is typically to use cooling elements and a fan inside the headlight to cool the To transport waste heat in a targeted manner from the components producing the waste heat to the cover plate, in the area of which it can be released.
- the prior art also discloses the use of a cooling element which has two sides, one of the sides being arranged inside the headlight and the other of the sides being outside.
- a cooling element which has two sides, one of the sides being arranged inside the headlight and the other of the sides being outside.
- a central part which is designed here as a thermoelectric cooler, i.e. for actively influencing the heat flow from the inside to the outside is.
- JP 2015-103335 A describes the use of for cooling LEDs
- Heat sinks which are flown with cooling air by two parallel fans. about a The baffle can be used to ensure that the air flows from the parallel fans do not mix unnecessarily before they reach the heatsink.
- a very complex cooled headlight is known from WO 2020/053068 A1.
- the headlight is cooled via an air conditioning circuit, which is connected to the interior of the headlight via a liquid heat exchanger or a liquid heat exchanger and cooling fins.
- the structure is complex to manufacture, requires many components and a correspondingly large amount of space in order to position the components of the air conditioning circuit adjacent to the headlight.
- the object of the present invention is now to specify an improved integrated cooling module which is improved compared to the structure mentioned in the prior art and which can preferably be used in an improved headlight.
- this object is achieved by a cooling module having the features in claim 1.
- Advantageous refinements and developments result from the dependent subclaims.
- a headlight with the features in claim 7 and such a cooling module solves the problem.
- advantageous refinements and developments of the headlight result from the dependent claims.
- the cooling module according to the invention is an integrated cooling module with a cooling element on the one hand and a conveying device for air on the other.
- the cooling element comprises a closed central part, which seals the areas on both sides of it from one another, and heat-conducting elements on the two sides of this central part.
- the conveying device is designed as an integrated twin fan, which conveys ambient air from one side of the central part on the one hand and ambient air from the other side of the central part to the cooling device on the other hand.
- the cooling device is therefore, for example, a plate with heat-conducting elements on one side and on the other.
- these heat-conducting elements can be designed as heat-conducting ribs or fins or also as heat-conducting fingers, pins or knobs. Also a combination of these Elements or the combination with other measures that increase the surface area of the cooling element on the respective side, such as roughening the surface or the like, are conceivable.
- Heat can now be transported from one side with the heat-conducting elements to the other side with the heat-conducting elements via this cooling element alone.
- the twin fans allow both sides to flow in parallel, so that, for example, warm air is conveyed to the heat-conducting elements of the first side on the one hand for cooling and at the same time cooler air is conveyed on the other side to dissipate the waste heat transferred from the first side to the second side can be.
- the twin fan has two fan wheels sealed against one another and a common electric drive motor for the two fan wheels.
- This structure is extremely simple and efficient and allows good functionality with little hardware, space and energy consumption.
- the one electric drive motor for the two fan wheels can preferably be arranged centrally between the two fan wheels.
- the twin fan can be designed as a radial fan, so that it draws in the sucked-in air, for example, laterally in relation to the respective side or its surface of the cooling element and then releases it again over the surface of the respective side of the central part and preferably between the heat-conducting elements .
- warm air can be efficiently conveyed to the heat-conducting elements, so that the heat is transported from one side to the other side, and at the same time, on the other side, cool air can be conveyed in the same way to move the heat from the first side to the second Efficiently dissipate heat transferred from the side.
- the twin fan is designed in such a way that it conveys the ambient air from the respective side of the cooling element or its central part on the pressure side to the heat-conducting elements and correspondingly the ambient air, preferably as a radial fan in the above-mentioned configuration perpendicular to this direction, sucks accordingly.
- a cooling module can always be used as an integrated cooling module where heat is to be transferred from one side to the other, especially in components with limited installation space, since this is where the highly integrated and compact design made possible by the cooling module according to the invention is possible , especially pays off.
- the cooling module can be integrated into a housing, which has air inlet openings on two opposite sides for the air drawn in by the twin fan and spaced therefrom exhaust air openings for the exhaust air after it has flowed through the heat conducting elements of the cooling element .
- the cooling element and twin fans can therefore be efficiently arranged in such a housing.
- the housing can then be inserted into a suitable cut-out in a wall. Screwing or also clipping can be provided for this purpose, for example.
- the heat can then be transported from one side of the wall to the other side of the wall. This can be done extremely easily and efficiently by merely connecting an electrical connection for one drive motor to a power source. Further measures, connections or the like are not necessary.
- the power can be supplied from one side or the other side of the wall, depending on what is more convenient in terms of assembly.
- a preferred use is in the area of a headlight.
- a headlight with a self-contained interior volume, with a transparent cover pane and lighting means, which include at least light-emitting diodes, their control electronics and the like, can now be ideally cooled via the cooling module according to the invention.
- the headlight according to the invention according to claim 7 provides that the central part of the cooling element of the cooling module forms part of the boundary of the inner volume, so that the heat-conducting elements on one side protrude into the inner volume and the heat-conducting elements on the other side protrude into the environment.
- any heat that occurs can then be conducted via one side of the twin fan to the cooling element or its heat-conducting elements.
- the heat then gets out of the completely sealable inner volume of the headlight through the cooling element or its central part on the other side to the heat conducting elements there. There it is released into the environment, which is supported by ambient air, which is guided from the other part of the twin fan via the corresponding heat-conducting elements in order to achieve cooling with forced assembly.
- the twin fan is set up, on the one hand, to circulate air in the interior volume and to convey it to the cooling element of the cooling module and, on the other hand, to convey ambient air to the other side of the cooling element. Both air flows are materially separate, so the air does not mix.
- the heat is dissipated from the headlight so efficiently that, in addition to dissipating heat via the cover pane, heat can also be dissipated in an additional area, for example an engine compartment or the like.
- a headlight is used as a headlight in a vehicle, in particular in a motor vehicle and here preferably in a non-rail land vehicle such as a car or truck .
- FIG. 1 shows a side view of a possible embodiment of a cooling module according to the invention in partial section
- FIG. 2 shows a plan view of the cooling module according to FIG. 1 in a sectional representation
- FIG. 3 shows a schematic representation of a vehicle headlight in an embodiment according to the invention.
- a side view of an integrated cooling module denoted in its entirety by 1 can be seen.
- a housing 2 of the integrated cooling module 1 is partially shown in a sectional view in order to provide a view of a cooling element 3 with a few indicated cooling pins 4 on the side 5 facing the viewer.
- a twin fan 6 is integrated into the housing 2, which is designed as a radial fan, with one of the radial fan wheels 7 being indicated in the housing in dashed lines, since it is covered by the actual housing 2.
- the functionality can best be shown in the top view, which can be seen in the sectional view of FIG.
- the housing 2 of the cooling module 1 is received in an opening 8 of a wall labeled 9 .
- a peripheral seal 10 is provided between the wall 9 and a flange 11 on the housing.
- the connection can be realized, for example, by gluing, screwing, riveting or the like.
- it can be implemented by clipping, for which purpose clips 12 indicated in FIG. 2 can be seen as part of the housing. If the housing is pushed into the opening 8 from above in the illustration in FIG. 2, then it can be easily and efficiently clipped to the wall 9, preferably with deformation of the inserted seal 10, so that the structure is completely sealed.
- the cooling element 3 has a closed central part 15 which is accommodated in the housing 2 in such a way that the area facing the inner volume 13 is sealed off from the area facing the outer volume 14.
- the first side 5 of the cooling element 3 or its central part 15, which faces downwards here, carries some of the cooling pins 4, the opposite second side 16 likewise.
- the sealing of the area adjacent to the two sides 5, 16 continues through the housing and is extended by an intermediate wall 17 which is arranged flush with the central part 15 of the cooling element 3.
- This intermediate wall 17 has an opening for one electric drive motor 18, which is part of the twin fan 6 and drives two impellers with their respective vanes 7 in parallel.
- the area of the two impellers is also sealed from one another by the intermediate wall 7 and the drive motor 18, so that when the housing 2 is installed in a sealed manner in the opening 8 of the wall 9, the inner volume 13 can be completely sealed off from the outer volume 14.
- the cooling element 3 with its cooling pins 4 and the central part 15 can be made of aluminum, for example.
- the heat is then conducted very well from the cooling pins 4 on the first side 5 of the central part 15 through the central part 15 to the cooling pins 4 on the second side 16 of the cooling element 3 or its central part 15 .
- the twin fan 6 now moves, in addition to the impeller in the illustration in FIG. 2 below, the impeller with the guide vanes 7 in the illustration in FIG. 2 at the top.
- both running wheels can be arranged on one and the same shaft of the common electric drive motor 18 and thus rotate at the same speed.
- a gear for changing the rotational speed of one of the running wheels would also be conceivable in principle.
- the impellers are preferably constructed analogously to one another.
- the ambient air of the outer volume 14 is sucked in via the air inlet openings 19 located there and flows, comparable to the other part of the integrated cooling module 1, between the cooling pins 4 on the second side 16 through to the Exhaust air openings 20.
- the ambient air from the outer volume 14 can absorb heat from the cooling pins 4 of the second side 16 of the cooling element 3 or its central part 15 and into the discharge environment. This enables efficient cooling of the inner volume 13 without the volumes being fluidically connected to one another. Rather, they can be completely sealed.
- the headlight 21 shown in FIG. 3 which has already been mentioned.
- Its structure consists of a housing 22 and a transparent cover plate 23. Below this cover plate 23, two fields 24 with light-emitting diodes are arranged purely by way of example.
- a control device 25 and a stepping motor 26 are indicated as examples.
- These elements in the interior volume 13 of the headlight 21 produce waste heat, which in practice can usually only be dissipated via the cover plate 23 .
- the cooling module 1 as shown in FIG.
- Heat is thus transferred via the cooling module 1 from the inner volume 13 of the headlight 21 into the volume surrounding the headlight 21, which correspondingly corresponds to the outer volume 14 in the structure according to FIG.
- the interior volume 13 of the headlight 21 itself can also be hermetically sealed in order to prevent the ingress of moisture, which could damage the electrical and, in particular, optical components inside the headlight 21 .
- the construction of the integrated cooling module 1 is extraordinarily efficient and compact. In addition to cooling via the cover pane 23, cooling is also made possible in other areas surrounding the headlight 21, for example in the area of an engine compartment, a body cavity or the like.
- the construction is extraordinarily simple and efficient. It can be electrically connected both from the interior volume 13 of the headlight 21 and from the exterior volume 14 . All that is required is an electrical connection for the common drive motor 18, so that this common drive motor 18 starts working, for example when the light is switched on, without the need for complex open-loop or closed-loop control or the like.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021005388.5A DE102021005388B4 (de) | 2021-10-29 | 2021-10-29 | Schweinwerfer mit einem Kühlmodul |
| PCT/EP2022/076960 WO2023072517A1 (de) | 2021-10-29 | 2022-09-28 | Kühlmodul und scheinwerfer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4423428A1 true EP4423428A1 (de) | 2024-09-04 |
Family
ID=83558095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22783517.0A Pending EP4423428A1 (de) | 2021-10-29 | 2022-09-28 | Kühlmodul und scheinwerfer |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US12247715B2 (de) |
| EP (1) | EP4423428A1 (de) |
| JP (1) | JP7710102B2 (de) |
| KR (1) | KR20240073075A (de) |
| CN (1) | CN117940702A (de) |
| DE (1) | DE102021005388B4 (de) |
| WO (1) | WO2023072517A1 (de) |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4586144B2 (ja) * | 2005-07-25 | 2010-11-24 | スタンレー電気株式会社 | 車両用灯具 |
| DE102007057056A1 (de) | 2007-11-27 | 2009-05-28 | Hella Kgaa Hueck & Co. | Scheinwerfer für ein Kraftfahrzeug mit Mitteln zum Wärmeaustausch zwischen dem Innenraum und der Außenseite des Scheinwerfers |
| JP4970232B2 (ja) * | 2007-12-12 | 2012-07-04 | 株式会社小糸製作所 | 車両用灯具 |
| JP5342553B2 (ja) * | 2008-06-06 | 2013-11-13 | 株式会社小糸製作所 | 車両用灯具 |
| KR101417403B1 (ko) * | 2012-11-12 | 2014-07-08 | 현대자동차주식회사 | 헤드램프의 습기발생 방지장치 |
| JP6151591B2 (ja) * | 2013-02-22 | 2017-06-21 | 株式会社小糸製作所 | 車両用灯具 |
| JP5928838B2 (ja) | 2013-11-22 | 2016-06-01 | ウシオ電機株式会社 | 光源装置 |
| DE102013113529B4 (de) | 2013-12-05 | 2023-03-09 | HELLA GmbH & Co. KGaA | Scheinwerfer für ein Fahrzeug mit einer Kühlluftführung |
| FR3058503B1 (fr) * | 2016-11-09 | 2019-01-25 | Valeo Vision | Dispositif lumineux equipe d'au moins un element peltier |
| FR3085741B1 (fr) | 2018-09-10 | 2021-05-28 | Valeo Vision | Projecteur pour un vehicule automobile |
-
2021
- 2021-10-29 DE DE102021005388.5A patent/DE102021005388B4/de active Active
-
2022
- 2022-09-28 US US18/704,102 patent/US12247715B2/en active Active
- 2022-09-28 JP JP2024520660A patent/JP7710102B2/ja active Active
- 2022-09-28 EP EP22783517.0A patent/EP4423428A1/de active Pending
- 2022-09-28 WO PCT/EP2022/076960 patent/WO2023072517A1/de not_active Ceased
- 2022-09-28 KR KR1020247013436A patent/KR20240073075A/ko active Pending
- 2022-09-28 CN CN202280062418.8A patent/CN117940702A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JP7710102B2 (ja) | 2025-07-17 |
| US20240410545A1 (en) | 2024-12-12 |
| KR20240073075A (ko) | 2024-05-24 |
| DE102021005388A1 (de) | 2023-05-04 |
| WO2023072517A1 (de) | 2023-05-04 |
| CN117940702A (zh) | 2024-04-26 |
| JP2024536357A (ja) | 2024-10-04 |
| DE102021005388B4 (de) | 2025-11-13 |
| US12247715B2 (en) | 2025-03-11 |
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