EP1068471B1 - Scheinwerfer oder leuchte - Google Patents
Scheinwerfer oder leuchte Download PDFInfo
- Publication number
- EP1068471B1 EP1068471B1 EP99919101A EP99919101A EP1068471B1 EP 1068471 B1 EP1068471 B1 EP 1068471B1 EP 99919101 A EP99919101 A EP 99919101A EP 99919101 A EP99919101 A EP 99919101A EP 1068471 B1 EP1068471 B1 EP 1068471B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- headlight
- blower
- light
- casing
- air
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
- F21S45/40—Cooling of lighting devices
- F21S45/42—Forced cooling
- F21S45/43—Forced cooling using gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
- F21S45/30—Ventilation or drainage of lighting devices
- F21S45/33—Ventilation or drainage of lighting devices specially adapted for headlamps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
- F21S45/30—Ventilation or drainage of lighting devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
- F21S45/30—Ventilation or drainage of lighting devices
- F21S45/37—Ventilation or drainage of lighting devices specially adapted for signal lamps
Definitions
- the invention relates to a headlight or a lamp for a motor vehicle, with a lens, a housing in which Housing arranged light sources, these associated reflectors and with a ventilation system that has at least one supply air opening, includes an exhaust port and a blower.
- the reflectors can namely to reflect the light in the direction of light emission, also as a support for light emission optics for additional lights such as. Flashing light or fog light can be used.
- Engine compartment side the headlight or the lamp is then from one Enclosed housing.
- conventional headlights or lights are e.g. three or even four light sources arranged in a spotlight. This simplifies assembly, because by installing the headlight all lights on the Vehicle are attached. This also gives the headlight a technically very interesting one for an observer from outside Impression.
- plastics for the housing or the reflector or for sealants usually used plastics, in particular PC polycarbonate, UP - unsaturated polyester, PP-GF - glass fiber reinforced Polypropylene (ester) and PVC - polyvinyl chloride.
- plastics contain outgassing volatile components.
- Ingredients that derogating from such plastics are e.g. Plasticizers, amines (PUR foam catalysts), lubricants, stabilizers, flame retardants or solvent.
- PUR foam catalysts e.g. Plasticizers, amines (PUR foam catalysts), lubricants, stabilizers, flame retardants or solvent.
- a precise listing of the fogging components is in "The fogging problem: measurement methods, ways and successes ", ATZ Automobiltechnische Zeitschrift 96 (94) page 238-246 Table 4 listed.
- Fogging leads to fogging or to gray the lens of the reflectors or to Decompose the plastic.
- Foggen takes on exponentially temperature, this is e.g. in "Temperature dependence of the Fogging Phenomenon "Kunststoffe 83 (1993), by F. Loock, Th. Lampe, AT THE. Bahadir described.
- the invention has for its object in a headlight or a lamp of the new generation the danger of graying or fogging of the lens or the reflectors To prevent fogging.
- this object is achieved in that at least one of the headlight parts at least partially a Ausfoggenden plastic is that the fan is an air from the housing suction fan, and that inside the housing air guiding devices are arranged so that the Blowers the air away from the lens and targeted at heat nests over to the back of the housing facing away from the lens leads.
- the air duct provided according to the invention also has an impact on the amount of fogging condensate in the Headlights.
- the flow of air past the reflector is particularly important because of its complicated geometric Training special protection against deposition of Condensates are required to ensure the specified light distribution or maintain unchanged. It is also important that the fan leads the air away from the lens, there volatile components when blowing on the windscreen the lens would be inflated.
- the fan is on or in a cover is arranged, the opening in the back of the housing is detachable closes.
- headlights of the generic type is in Usually such a cover is provided to the light sources easy to replace, without the entire headlight to have to expand.
- the lid also serves as a fastening attachment for a headlamp leveling device or other electrical Attachment parts.
- the air guiding devices Comprise flow openings in the reflector, these flow openings preferably close to the Light source are arranged.
- the air guiding column between the outer reflector edge and include the housing wall are advantageous if the air guiding column between the outer reflector edge and include the housing wall.
- the function of the fan is expedient to that Parking lights electrically coupled. This will turn on of the parking lights at the same time actuated the blower, which also works is switched on when the vehicle is stationary, due to the lack of Airflow to compensate for missing headlight cooling can.
- blower be turned off the headlight or the lamp according to a predetermined Overrun time can be switched off. This will make the fully heated one Headlights are cooled for a while even when the vehicle is stationary and prevents it from going out.
- the headlight has multiple light sources different Luminous intensity on, it is advisable to use the blower of the brightest Assign light source because it emits the most heat and thus represents the most critical point in the headlight.
- This fan arrangement makes it particularly effective Heat dissipation achieved.
- the invention is described below using an exemplary embodiment explained in more detail.
- the single figure shows one in cross section Headlights with a ventilation system.
- the headlight 1 has a housing 5 and a lens 2 on.
- Light sources 3 and reflectors 4 are provided in the housing 5.
- the light emitted by the light sources 3 is about the reflectors 4 emitted through the lens 2 to the outside.
- the light sources 3 can e.g. attached to the reflectors 4 be or other connected to the housing 5 Mounting bosses.
- the reflectors 4 can also used as a carrier for light emission optics for other light sources be on the side facing away from the lens 2 Side of the reflector 4 are arranged.
- the desired light distribution is determined by targeted geometric design of the reflectors 4 reached. Thereby it is possible to use a clear lens 2.
- the lens 2 is therefore made of one specially tempered glass or made of specially adjusted plastic, in particular PC-H (polycarbonate) manufactured to deformation to avoid by exposure to heat. From manufacturing technology The reasons for this are the housing 5 and / or the reflectors 4 and / or sealant between the components made of plastic.
- Plastics such as PC - polycarbonate, UP - unsaturated Polyester, PP-GF - glass fiber reinforced polypropylene (Ester) and PVC - polyvinyl chloride point to the desired Manufacture properties of plastics, additives such as plasticizer components, Flame retardants or lubricants.
- This volatile constituents gas especially at high temperatures from the plastics.
- This process is general described with fogging. After the headlight has cooled these volatile components settle on the reflectors or the lens and lead to its graying. Farther it is possible that the properties of the Plastics change unintentionally.
- a major influence on the amount of fogging condensate has the temperature of Plastic. For example, an increase in temperature from 90 ° C to 120 ° C with one instrument panel film Tenfold increase in fogging condensate.
- the housing 5 On the side of the reflectors 4 facing away from the light exit side, the housing 5 has an opening 25.
- the opening 25 is closed with a cover 6.
- the cover 6 serves as a fastening attachment, for example for a control device for a headlight range control 8 or plug contacts, not shown.
- the cover 6 has an exhaust air opening 15, in which the blower 7 is arranged.
- the arrangement of the blower 7 in the cover 6 makes it possible to retrofit headlights not previously equipped with a blower with a blower.
- the blower 7 is, for example, a commercially available fan, as is used in computer housings.
- the volume flow is, for example, 11 m 3 / h with a current consumption of 0.09 amperes and a voltage of 13 volts; the power consumed by the fan is therefore very low and can also be accepted from an energy point of view.
- the components around which the flow flows such as the reflectors 4 or the housing 5, are cooled, so that the volatile constituents which outgas from these parts are reduced.
- the increased air exchange also has an effect on the amount of fogging condensate in the headlight.
- supply air openings 10 which are arranged in the area behind the lens 2 on the housing circumference, can be enlarged and, in order to prevent the ingress of dust, engine ambient vapors and / or water, additional filter measures (for example carbon filters in connection with, for example, GORO -TEX®) with splash protection against water.
- additional filter measures for example carbon filters in connection with, for example, GORO -TEX®
- the invention offers the advantage that the lens 2 is exposed to a lower thermal load due to the cooling effect and can therefore also be made from a conventional plastic.
- the reflectors can have targeted flow openings 31 have, then by the choice of the gap width of columns 30 and the size of the passage opening 31 of the air flow can be guided in such a way that it is directed past heat nests becomes.
- the airflow is bypassed on the reflector 4 is particularly important because the reflector 4 through its complicated geometric formation, which ultimately the Light distribution determined, especially before condensate deposits to protect, otherwise the specified light distribution is not observed.
- the path of the air flow is through the Arrows shown. It is particularly important that the fan 7 Air leads away from the lens. Blowing on the lens similar to blowing the windshield on the vehicle interior ventilation would be undesirable because it volatile components specifically inflated onto the lens 2 would be.
- the reflector 4 can be outgassing volatile constituents undergo material decomposition, which ultimately also affects the light distribution.
- one of the light sources 3 is designed as a fog light, it is it is appropriate that the fan 7 is arranged in the area of the fog light is because of its particularly high fog light Light output also represents a particularly large heat source.
- the blower 7 is electrically coupled to the parking light. On This ensures that even in the event of unintentional Operating the parking lights ventilation of the headlamp 1 by means of the blower 7. It is also provided that the Blower 7 a predetermined after turning off the headlamp 1 Bear-up time is still running, so that volatile still present Components are removed from the headlight 1, and the Headlights cooled to an acceptable operating temperature is so that the further outgassing of volatile constituents is reduced to a minimum.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Abstract
Description
Claims (10)
- Scheinwerfer oder Leuchte (1) für ein Kraftfahrzeug, mit einer Lichtscheibe (2), einem Gehäuse (5), in dem Gehäuse (5) angeordneten Lichtquellen (3), diesen zugeordneten Reflektoren (4) und
mit einem Belüftungssystem, das zumindest eine Zuluftöffnung (10), eine Abluftöffnung (15) sowie ein Gebläse (7) umfaßt,
dadurch gekennzeichnet, daß zumindest eines der Scheinwerferteile zumindest teilweise aus einem ausfoggenden Kunststoff besteht,
daß das Gebläse (7) ein Luft aus dem Gehäuse (5) absaugendes Sauggebläse ist, und
daß innerhalb des Gehäuses (5) Luftleiteinrichtungen (30, 31) so angeordnet sind, daß das Gebläse (7) die Luft von der Lichtscheibe (2) weg und gezielt an Wärmenestern vorbei zu der von der Lichtscheibe (2) abgewandten Gehäuserückseite führt. - Schweinwerfer oder Leuchte nach Anspruch 1, dadurch gekennzeichnet, daß das Gebläse (7) auf oder in einem Deckel (6) angeordnet ist, der eine Öffnung (25) in der Gehäuserückseite lösbar verschließt.
- Scheinwerfer oder Leuchte nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Luftleiteinrichtungen (30, 31) Durchströmöffnungen (31) in dem Reflektor (4) umfassen.
- Scheinwerfer oder Leuchte nach Anspruch 3, dadurch gekennzeichnet, daß die Durchströmöffnungen (31) dicht neben der Lichtquelle (3) angeordnet sind.
- Scheinwerfer oder Leuchte nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Luftleiteinrichtungen (30, 31) Spalte (30) zwischen dem äußeren Reflektorrand und der Gehäusewandung umfassen.
- Scheinwerfer oder Leuchte nach einem der vorhergehenden Ansprüche, gekennzeichnet durch mehrere Lichtquellen (3) unterschiedlicher Lichtstärke, wobei das Gebläse (7) der lichtstärksten Lichtquelle zugeordnet ist.
- Scheinwerfer oder Leuchte nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Gebläse (7) mit einem Standlicht elektrisch gekoppelt ist.
- Scheinwerfer oder Leuchte nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Gebläse (7) nach dem Ausschalten des Scheinwerfers oder der Leuchte (1) nach einer vorgegebenen Nachlaufzeit abschaltbar ist.
- Scheinwerfer oder Leuchte nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Kunststoff ein PC - Polykarbonat, UP - ungesättigtes Polyester, PP-GF - glasfaserverstärktes Polypropylen (Ester) und PVC - Polyvinylchlorid ist.
- Scheinwerfer oder Leuchte nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Zuluftöffnungen (10) im Bereich hinter der Lichtscheibe (2) auf dem Gehäuseumfang verteilt angeordnet sind.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19814300 | 1998-03-31 | ||
DE19814300A DE19814300B4 (de) | 1998-03-31 | 1998-03-31 | Scheinwerfer oder Leuchte |
PCT/DE1999/000791 WO1999050594A1 (de) | 1998-03-31 | 1999-03-20 | Scheinwerfer oder leuchte |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1068471A1 EP1068471A1 (de) | 2001-01-17 |
EP1068471B1 true EP1068471B1 (de) | 2004-03-03 |
EP1068471B9 EP1068471B9 (de) | 2004-10-06 |
Family
ID=7863045
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99919101A Expired - Lifetime EP1068471B9 (de) | 1998-03-31 | 1999-03-20 | Scheinwerfer oder leuchte |
Country Status (7)
Country | Link |
---|---|
US (1) | US6497507B1 (de) |
EP (1) | EP1068471B9 (de) |
JP (1) | JP4274697B2 (de) |
CN (1) | CN1125263C (de) |
DE (1) | DE19814300B4 (de) |
ES (1) | ES2212846T3 (de) |
WO (1) | WO1999050594A1 (de) |
Cited By (1)
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---|---|---|---|---|
DE102015209276A1 (de) | 2015-05-21 | 2016-11-24 | Volkswagen Ag | Beleuchtungseinrichtung eines Kraftfahrzeugs |
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DE3906366C2 (de) * | 1989-03-01 | 1997-12-04 | Schnippering Hugo Gmbh Co Kg | Lampenfassung, die in den Reflektorhals einer Kraftfahrzeugleuchte eingesetzt wird |
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JP2756906B2 (ja) * | 1993-12-10 | 1998-05-25 | トヨタ自動車株式会社 | 車両用灯具 |
DE19607797A1 (de) * | 1995-03-03 | 1996-09-05 | Volkswagen Ag | Recyclinggerechter Scheinwerfer |
FR2732750B1 (fr) * | 1995-04-06 | 1997-06-20 | Valeo Vision | Dispositif de ventilation a chicane d'un bloc optique de vehicule automobile |
DE19644207A1 (de) * | 1996-10-24 | 1998-04-30 | Basf Ag | Direkt metallisierbare Scheinwerferreflektoren |
JPH10171362A (ja) * | 1996-12-06 | 1998-06-26 | Hitachi Ltd | 液晶プロジェクタ |
EP0859188A3 (de) | 1997-02-12 | 1999-09-08 | Volkswagen Aktiengesellschaft | Scheinwerferbetauungsschutz |
TW416531U (en) * | 1999-06-10 | 2000-12-21 | Optoma Corp | Spotlight structure capable of easily dissipating heat |
US6422730B1 (en) * | 2000-03-17 | 2002-07-23 | Super Vision International, Inc. | Fiber optic light source with two chamber cooling |
-
1998
- 1998-03-31 DE DE19814300A patent/DE19814300B4/de not_active Expired - Lifetime
-
1999
- 1999-03-20 ES ES99919101T patent/ES2212846T3/es not_active Expired - Lifetime
- 1999-03-20 US US09/622,794 patent/US6497507B1/en not_active Expired - Lifetime
- 1999-03-20 JP JP2000541460A patent/JP4274697B2/ja not_active Expired - Fee Related
- 1999-03-20 WO PCT/DE1999/000791 patent/WO1999050594A1/de active IP Right Grant
- 1999-03-20 EP EP99919101A patent/EP1068471B9/de not_active Expired - Lifetime
- 1999-03-20 CN CN99804749A patent/CN1125263C/zh not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015209276A1 (de) | 2015-05-21 | 2016-11-24 | Volkswagen Ag | Beleuchtungseinrichtung eines Kraftfahrzeugs |
Also Published As
Publication number | Publication date |
---|---|
US6497507B1 (en) | 2002-12-24 |
DE19814300B4 (de) | 2008-09-25 |
JP2002510136A (ja) | 2002-04-02 |
EP1068471B9 (de) | 2004-10-06 |
CN1125263C (zh) | 2003-10-22 |
EP1068471A1 (de) | 2001-01-17 |
CN1295659A (zh) | 2001-05-16 |
JP4274697B2 (ja) | 2009-06-10 |
ES2212846T3 (es) | 2004-08-01 |
DE19814300A1 (de) | 1999-10-07 |
WO1999050594A1 (de) | 1999-10-07 |
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