EP3087311A1 - Leuchte - Google Patents
LeuchteInfo
- Publication number
- EP3087311A1 EP3087311A1 EP13777235.6A EP13777235A EP3087311A1 EP 3087311 A1 EP3087311 A1 EP 3087311A1 EP 13777235 A EP13777235 A EP 13777235A EP 3087311 A1 EP3087311 A1 EP 3087311A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooling
- heat sink
- housing
- light
- cooling element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000001816 cooling Methods 0.000 claims abstract description 112
- 239000002360 explosive Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 238000004880 explosion Methods 0.000 abstract 1
- 238000000926 separation method Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
-
- 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
- F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
- F21V29/73—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks the elements being adjustable with respect to each other, e.g. hinged
-
- 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
- F21V25/00—Safety devices structurally associated with lighting devices
- F21V25/12—Flameproof or explosion-proof arrangements
-
- 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
- F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
- F21V29/71—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks using a combination of separate elements interconnected by heat-conducting means, e.g. with heat pipes or thermally conductive bars between separate heat-sink elements
-
- 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
- F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
- F21V29/71—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks using a combination of separate elements interconnected by heat-conducting means, e.g. with heat pipes or thermally conductive bars between separate heat-sink elements
- F21V29/717—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks using a combination of separate elements interconnected by heat-conducting means, e.g. with heat pipes or thermally conductive bars between separate heat-sink elements using split or remote units thermally interconnected, e.g. by thermally conductive bars or heat pipes
-
- 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
- F21V19/00—Fastening of light sources or lamp holders
- F21V19/02—Fastening of light sources or lamp holders with provision for adjustment, e.g. for focusing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Definitions
- the invention relates to a luminaire, in particular for use in potentially explosive atmospheres, with at least one luminous means, a cooling device for the luminous means and a luminaire housing with light exit opening, luminous means and cooling device being arranged in the luminaire housing.
- the luminous means is a heat source, which must be cooled by the corresponding cooling device, which is particularly with regard to use in potentially explosive areas of advantage or necessary.
- the lamp is located near the cooling device or at this.
- a cooling device for example, a heat sink with appropriate cooling ribs can be used.
- LEDs are frequently used as lighting means in recent times. These are more effective compared to previously common bulbs with regard to a corresponding implementation of the energy used in visible light. However, even with these LEDs only a maximum of 30% of the energy used is converted into visible light. Especially with such bulbs, however, it is necessary that they are sufficiently cooled, otherwise their life, light output or color output is negatively affected at too high temperatures. In addition, it is generally true that at temperatures of 120 ° C or more a corresponding semiconductor crystal of the LED is damaged and it comes to lasting impairment of life, light color, light output or the like.
- the previously used cooling devices are mounted within the lamp housing so that on the one hand, a corresponding heat transfer from the bulb can be made to the cooling device and on the other hand, the alignment of the bulb is guaranteed to the corresponding light exit opening of the lamp housing.
- corresponding reflection devices can be used for this purpose.
- both the cooling device and the corresponding points of the lamp housing to which the cooling device is attached have manufacturing tolerances, so that a corresponding heat transfer contact between the cooling device and the lamp housing for dissipating the heat to the housing and finally is compromised in the environment. This is partially offset by additional application of a thermal compound or the like.
- the invention is therefore based on the object to improve heat transfer from the lamp and in particular from the cooling device to the lamp housing in a simple and secure manner without additional use of thermal grease or the like, with corresponding manufacturing tolerances that can negatively affect a good thermal contact, no longer are taken into account.
- the invention is characterized in particular by the fact that, for sufficient contact with the lamp housing for heat transmission, the cooling device has a length-variable cooling element or is designed as such.
- variable-length cooling element extends between the other cooling device and the luminaire housing and thus produces sufficient contact for heat transfer even in the case of manufacturing tolerances. This means that, on the one hand, there is contact between the cooling device and the luminaire housing, but this is adversely affected by the manufacturing tolerances, so that an additional contact is made via the variable length cooling element, which compensates for any heat transfer loss due to manufacturing tolerances or the like.
- the cooling device is designed directly as such a variable-length cooling element, so that it can be increased or decreased in size to improve contact with the corresponding attachment point in the lamp housing, or to make further contacts to the lamp housing.
- variable-length cooling element improves the direct contact between the heat source, ie the light source, and the luminaire housing, even with manufacturing tolerances, and as a rule increases it.
- the cooling device comprises a heat sink
- the variable-length cooling element can extend between this heat sink and a matching housing part, in particular a housing wall. The distance of the heat sink from the housing part, the length of the cooling element is adjusted.
- a simple embodiment of such a variable-length cooling element is for example a cooling spring. This is simply placed between the heat sink and the housing part and held by its own spring tension in position.
- the cooling spring is formed of a corresponding material with high thermal conductivity, such as a metal or corresponding alloys.
- the variable-length cooling element can be designed as a te les-couplable cooling element. That is, for example, two or more nested and relatively apart sliding tubes extend between the heat sink and the corresponding housing part.
- variable-length cooling elements are arranged on different sides of the heat sink between this and a corresponding housing part. If the heat sink, for example, cuboid, may extend from all sides of the heat sink corresponding variable length cooling elements from the heat sink to the adjacent housing part and significantly improve the heat transfer to the lamp housing.
- the variable-length cooling elements are easy to arrange and usually designed to retrofit bar. That is, as required, such a variable length cooling element may be installed or added to existing variable length cooling elements may be added to others.
- the heat sink is variable in length directly. That is, it can rest with a body surface on a corresponding device within the lamp housing and be introduced with other body surfaces by its length variability to other housing parts and in particular the housing wall, so that there can also be a heat transfer to the lamp housing.
- a simple embodiment of such a variable-length heat sink can be seen for example in that it has two interlocking heat sink parts, which are displaceable against each other and while maintaining a heat transfer between them. Such a displaceability may, for example, result from arm-like protrusions projecting from one heat sink part, which engage displaceably in corresponding openings in the other heat sink part.
- the heat sink parts are movable relative to each other, but with a corresponding variation of their extent or length in the corresponding direction continues in heat transfer contact.
- Other possibilities for intermeshing of the heat sink parts and for enabling a relative displacement of the heat sink parts are conceivable.
- the heat sink parts can be spring-loaded in the separating direction of these parts. That is, the heatsink parts are pressed together into corresponding positions, and when placed in the installation position, the external pressure is released, so that the spring load moves the heatsink parts away from each other in the separation direction and is brought into contact with the housing parts.
- the cooling body parts have a retaining device for limiting the length variability in the separating direction.
- a retaining device may be a latching mechanism, a physical stop or the like.
- variable-length cooling element may have at its respective ends cooling surfaces for engagement with the housing part or on the heat sink.
- These cooling surfaces may have larger dimensions than the corresponding ends of the cooling elements.
- this may have at their ends flat cooling plates as a heat sink, which are in particular pressed against the housing wall and accordingly also to the heat sink. As a result, the surface contact between them is increased, so that a greater heat transfer can take place.
- Corresponding cooling surfaces can also be used in the telescopic be arranged pierbaren cooling element at its ends.
- the cooling surfaces have a certain flexibility in order to be able to easily adapt to corresponding curvatures of the housing parts or the heat sink, for example.
- a heat transfer medium can be arranged between the heat-sink parts which are displaceable relative to one another or the parts of the telescopable cooling element which can be displaced relative to one another be. It is also conceivable that additionally such a heat transfer medium between the respective cooling surfaces and housing parts or heat sink is arranged.
- cooling compartments are interchangeable. This means, for example, that a cooling surface with a certain geometry and curvature is replaced by another cooling surface, which rests better on the corresponding housing part or heat sink for heat transfer.
- the invention makes it possible in a simple manner to arrange the corresponding light source directly on the heat sink or on the heat sink.
- a luminous means but a plurality or multiplicity of such luminous means are arranged on the heat sink or on the heat sink.
- An example of such a luminous means is a single LED or a plurality of LEDs, which are present, for example, in the form of LED light strips, LED spots, LED stripes or the like.
- Figure 1 is a schematic diagram of a lamp with inventive cooling device and Figure 2 is a section along the line II-IL of Figure 1 for a further embodiment of the invention.
- FIG. 1 shows a side view in the form of a cross section through a luminaire 1 according to the invention.
- This comprises a luminaire housing 4 in which at least a number of luminous means 2 and an associated cooling device 3 are arranged. Further electrical or electronic devices and also reflection devices are not shown in FIG. 1 for the sake of simplicity.
- the cooling device 3 comprises, for example, a heat sink 7 in the form of a cuboid or the like, to which, however, cooling fins may also be arranged.
- a heat sink 7 in the form of a cuboid or the like, to which, however, cooling fins may also be arranged.
- an additional cooling element in the form of a variable-length cooling element 6 is arranged in addition to the heat sink 7 as part of the cooling device 3.
- a variable-length cooling element 6 is arranged in the form of a cooling spring 10. This extends between one end side of the cooling body 7 and a housing part 8 in the form of a housing wall 9.
- the cooling spring 10 presses with its two ends on one side against the housing wall 9 and on the other side against the heat sink 7.
- the cooling spring at their ends cooling surfaces 15 and 16 have. These are connected to the cooling spring 10 and lie flat against the housing wall 9 or heat sink 7 at.
- the cooling surfaces 15, 16 may be exchangeable and / or flexible.
- a variable-length cooling element 6 in the form of a telescopic cooling element 11 is arranged. net. This includes, for example, two telescoped pipe elements which are longitudinally variable apart and pushed one inside the other.
- the illustrated form of the telescopic cooling element 11 is only an example, wherein tubular, rail-shaped or other telescoping elements can be used. Also in this telescoping cooling element 11, it is advantageous if the corresponding telescopic elements are spring-loaded in the extension direction.
- the heat sink 7 rests on a bearing surface 18 and is in heat transfer contact with it.
- a further heat transfer contact to corresponding points of the lamp housing 4 and in particular to the housing wall 9 is produced as a corresponding housing part 8.
- FIG. 2 shows a section along the line II-II from FIG. 1 for a further exemplary embodiment of the invention.
- the heat sink 7 is formed directly as a variable-length cooling element 6. That is, the heat sink 7 consists of at least two heat sink parts 12 and 13, respectively, which are slidable into and out of each other relative to each other. The corresponding heat sink 7 is arranged on the bearing surface 18, but can produce a further contact with a housing wall 9 as a housing part 8 by ejecting the heat sink part 12 or 13. In FIG. 2, the two heat sink parts 12, 13 are still compressed and are not additionally shown in contact with the housing wall 9, taking advantage of their length variability.
- spring elements 17 can be arranged, which support a sliding apart of the heat sink parts 12, 13 in the separation direction 14. That is, a pushing out of the heat sink portion 12 is allowed from the cooling body part 13, this moves due to the spring load by the spring elements 17 until it rests against the housing wall 9. This creates a further thermal contact with the lamp housing 4, which may affect the thermal contact between the heat sink 7 and bearing surface 18 due to manufacturing tolerances or the like at least compensated.
- both heat sink parts 12, 13 engage in one another like a comb.
- a retaining mechanism that prevents, for example, too far separation of heat sink part 12 of the heat sink part 13 in the separation direction 14, so that a certain interlocking of the two heat sink parts 12 and 13 is always guaranteed.
- a retaining mechanism may be for example a latching mechanism, a mechanical stop or the like.
- telescoping cooling element 11 and heat sink parts 12 and 13 may be applied for better coupling and heat transfer, a corresponding heat transfer medium.
- the cooling device has a variable-length cooling element, which as a rule produces a further contact between a cooling element of the cooling device and a corresponding housing part of the luminaire housing.
- the variable-length cooling element is in many embodiments for a lamp additional active cooling of the lamps, for example in the form of a fan or the like no longer necessary.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2013/003021 WO2015051810A1 (de) | 2013-10-08 | 2013-10-08 | Leuchte |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3087311A1 true EP3087311A1 (de) | 2016-11-02 |
EP3087311B1 EP3087311B1 (de) | 2019-11-27 |
Family
ID=49382388
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13777235.6A Active EP3087311B1 (de) | 2013-10-08 | 2013-10-08 | Leuchte |
Country Status (5)
Country | Link |
---|---|
US (1) | US10030862B2 (de) |
EP (1) | EP3087311B1 (de) |
CN (2) | CN106030204A (de) |
BR (1) | BR112016007558A2 (de) |
WO (1) | WO2015051810A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITUA20161520A1 (it) * | 2016-03-10 | 2017-09-10 | A A G Stucchi S R L | Dispositivo dissipatore di calore in particolare per l’impiego in un apparecchio di illuminazione tubolare e apparecchio di illuminazione tubolare impiegante lo stesso |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6632405B2 (en) * | 2001-06-26 | 2003-10-14 | Edgardo R. Lua | Solar-power battery air freshener with oscillating fan |
DE10258624B3 (de) * | 2002-12-16 | 2004-07-15 | Daimlerchrysler Ag | Scheinwerfereinheit für ein Kraftfahrzeug |
DE102006001711B4 (de) * | 2006-01-13 | 2008-10-30 | Audi Ag | Beleuchtungseinrichtung für ein Kraftfahrzeug |
KR101014485B1 (ko) * | 2008-05-07 | 2011-02-14 | 현대자동차주식회사 | 방열성능이 개선된 조사각 가변용 헤드램프장치 |
EP2336631B1 (de) | 2008-11-28 | 2017-10-25 | Toshiba Lighting&Technology Corporation | Beleuchtungsvorrichtung |
KR101814194B1 (ko) * | 2009-06-17 | 2018-01-02 | 필립스 라이팅 홀딩 비.브이. | 구성요소를 히트싱크에 연결하기 위한 커넥터 |
EP2366937B1 (de) * | 2010-03-18 | 2017-12-06 | GLP German Light Products GmbH | Appareil d'éclairage |
DE102010060642B4 (de) * | 2010-11-18 | 2019-12-12 | HELLA GmbH & Co. KGaA | Scheinwerfer mit einer verbesserten Anordnung eines Kühlkörpers |
DE102011103605B4 (de) * | 2011-06-08 | 2015-09-10 | Cooper Crouse-Hinds Gmbh | Kühlsystem und led-basierte leuchte, beinhaltend selbiges |
US8915603B2 (en) * | 2012-12-05 | 2014-12-23 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Cooling system utilizing potential energy |
-
2013
- 2013-10-08 BR BR112016007558A patent/BR112016007558A2/pt not_active IP Right Cessation
- 2013-10-08 US US15/026,920 patent/US10030862B2/en active Active
- 2013-10-08 CN CN201380080131.9A patent/CN106030204A/zh active Pending
- 2013-10-08 WO PCT/EP2013/003021 patent/WO2015051810A1/de active Application Filing
- 2013-10-08 EP EP13777235.6A patent/EP3087311B1/de active Active
- 2013-10-08 CN CN202010669584.7A patent/CN111720806B/zh active Active
Also Published As
Publication number | Publication date |
---|---|
US10030862B2 (en) | 2018-07-24 |
US20160258612A1 (en) | 2016-09-08 |
CN111720806B (zh) | 2022-12-27 |
EP3087311B1 (de) | 2019-11-27 |
CN106030204A (zh) | 2016-10-12 |
BR112016007558A2 (pt) | 2017-08-01 |
WO2015051810A1 (de) | 2015-04-16 |
CN111720806A (zh) | 2020-09-29 |
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