EP3087311B1 - Lampe - Google Patents

Lampe Download PDF

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Publication number
EP3087311B1
EP3087311B1 EP13777235.6A EP13777235A EP3087311B1 EP 3087311 B1 EP3087311 B1 EP 3087311B1 EP 13777235 A EP13777235 A EP 13777235A EP 3087311 B1 EP3087311 B1 EP 3087311B1
Authority
EP
European Patent Office
Prior art keywords
cooling
light fixture
length
fixture according
variable
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.)
Active
Application number
EP13777235.6A
Other languages
German (de)
English (en)
Other versions
EP3087311A1 (fr
Inventor
Jens Burmeister
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eaton Protection Systems IP GmbH and Co KG
Original Assignee
Eaton Protection Systems IP GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Eaton Protection Systems IP GmbH and Co KG filed Critical Eaton Protection Systems IP GmbH and Co KG
Publication of EP3087311A1 publication Critical patent/EP3087311A1/fr
Application granted granted Critical
Publication of EP3087311B1 publication Critical patent/EP3087311B1/fr
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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 corresponding cooling fins
  • 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 the cooling device has a length-variable cooling element for sufficient contact with the lamp housing for heat transfer, 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. That is, on the one hand there is a contact between the cooling device and the lamp housing, but this is possibly adversely affected by the manufacturing tolerances, so that via the variable length cooling element an additional contact is made, which compensates 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 the 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.
  • 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.
  • variable-length cooling element 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.
  • variable-length cooling element may be formed as a telescopic cooling element. That is, for example, two or more nested tubes which slide apart relative to one another 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.
  • variable length cooling elements are easy to arrange and usually designed to be retrofitted. 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.
  • variable-length heat sink has two interlocking heat sink parts, which are displaceable against each other and while maintaining a heat transfer between them.
  • 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.
  • the heat sink parts can be spring-loaded in the separating direction of these parts. That is, the heatsink members are pressed together into respective positions, and upon being installed in the installed position, the external pressure is released, so that the spring load moves the heatsink members away from each other and into contact with the housing members.
  • 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 larger heat transfer can take place.
  • Corresponding cooling surfaces can also be in the telescopic Cooling element can be arranged at the ends. In this context, it would also be advantageous if 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 between the relatively movable heat sink parts or the relatively displaceable parts of the telescopic cooling element can be arranged. 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 light source 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.
  • FIG. 1 is a side view in the form of a cross section through a lamp 1 according to the invention shown.
  • This comprises a luminaire housing 4 in which at least a number of luminous means 2 and an associated cooling device 3 are arranged.
  • Other electrical or electronic devices and also reflection devices are for simplicity in FIG. 1 not shown.
  • 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 heat sink 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. The flexibility results in a better adaptation to possibly curved surfaces of the housing wall 9 or of the heat sink 7. It is also possible that corresponding cooling surfaces 15, 16 have structures which are complementary to structures of the housing wall 9 or heat sink 7.
  • variable-length cooling element 6 in the form of a telescopic cooling element 11 is arranged on the other side of the heat sink 7.
  • the illustrated form of the telescoping cooling element 11 is only an example, wherein tubular, rail-shaped or other telescoping elements can be used. Also in this telescopic 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 is a section taken along the line II-II FIG. 1 illustrated for a further 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, which are slidable relative to each other and into 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 not additionally shown in use of the housing wall 9 taking advantage of their length variability.
  • spring elements 17 may 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. Thus, a further thermal contact is made to 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 retention mechanism that prevents, for example, too far separation of the heat sink portion 12 of the heat sink portion 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 generally produces a further contact between a cooling element of the cooling device and a corresponding housing part of the lamp housing.
  • the heat transfer from the heat source i. the lamp or lamps improved on the luminaire housing, which can deliver accordingly heat to the environment.
  • 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.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Claims (15)

  1. Lampe (1) destinée à être utilisée dans des zones exposées à des risques d'explosion avec au moins un moyen d'éclairage (2), un dispositif de refroidissement (3) du moyen d'éclairage (2) et un boîtier de lampe (4) avec une ouverture de sortie de lumière (5), boîtier de lampe (4) à l'intérieur duquel sont agencés complètement le au moins un moyen d'éclairage et le dispositif de refroidissement (3), caractérisée en ce que le dispositif de refroidissement (3) pour un transfert de chaleur au boîtier de lampe (4) présente un élément de refroidissement (6) de longueur variable ou est réalisé en tant que tel.
  2. Lampe selon la revendication 1, caractérisée en ce que l'élément de refroidissement (6) de longueur variable s'étend entre un corps de refroidissement (7) du dispositif de refroidissement (3) et une partie de boîtier (8), en particulier une paroi de boîtier (9).
  3. Lampe selon la revendication 1 ou 2, caractérisée en ce que l'élément de refroidissement (6) de longueur variable est réalisé sous la forme d'un ressort de refroidissement (10).
  4. Lampe selon l'une quelconque des revendications précédentes, caractérisée en ce que l'élément de refroidissement (6) de longueur variable est réalisé sous la forme d'un élément de refroidissement télescopique (11).
  5. Lampe selon l'une quelconque des revendications précédentes, caractérisée en ce que des éléments de refroidissement (6) de longueur variable sont agencés sur des côtés différents du corps de refroidissement (7) entre celui-ci et la partie de boîtier correspondante (8).
  6. Lampe selon l'une quelconque des revendications précédentes, caractérisée en ce que l'élément de refroidissement (6) de longueur variable peut être remplacé.
  7. Lampe selon l'une quelconque des revendications précédentes, caractérisée en ce que le corps de refroidissement (7) est de longueur variable.
  8. Lampe selon l'une quelconque des revendications précédentes, caractérisée en ce que le corps de refroidissement (7) présente deux parties de corps de refroidissement imbriquées (12, 13), qui peuvent être déplacées mutuellement en maintenant un contact de transfert de chaleur.
  9. Lampe selon l'une quelconque des revendications précédentes, caractérisée en ce que les parties de corps de refroidissement (12, 13) sont chargées par ressort dans une direction de séparation (14) des parties de corps de refroidissement.
  10. Lampe selon l'une quelconque des revendications précédentes, caractérisée en ce que les parties de corps de refroidissement (12, 13) présentent un dispositif de retenue pour limiter la variation de longueur dans la direction de séparation (14).
  11. Lampe selon l'une quelconque des revendications précédentes, caractérisée en ce que l'élément de refroidissement (6) de longueur variable présente au niveau de ses extrémités des surfaces de refroidissement (15, 16) destinées à venir en butée sur la partie de boîtier associée (8) ou sur le corps de refroidissement (7).
  12. Lampe selon l'une quelconque des revendications précédentes, caractérisée en ce qu'un milieu de transfert thermique est agencé entre les surfaces de refroidissement (15, 16) ou un élément de refroidissement (6) de longueur variable et une partie de boîtier (8) ou un corps de refroidissement (7) et/ou entre les parties de corps de refroidissement (12, 13) pouvant être déplacées relativement l'une par rapport à l'autre.
  13. Lampe selon l'une quelconque des revendications précédentes, caractérisée en ce que les surfaces de refroidissement (15, 16) sont interchangeables.
  14. Lampe selon l'une quelconque des revendications précédentes, caractérisée en ce que le moyen d'éclairage (2) est agencé sur le corps de refroidissement (7).
  15. Lampe selon l'une quelconque des revendications précédentes, caractérisée en ce que le moyen d'éclairage (2) présente une LED unique ou une pluralité de LED.
EP13777235.6A 2013-10-08 2013-10-08 Lampe Active EP3087311B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2013/003021 WO2015051810A1 (fr) 2013-10-08 2013-10-08 Lampe

Publications (2)

Publication Number Publication Date
EP3087311A1 EP3087311A1 (fr) 2016-11-02
EP3087311B1 true EP3087311B1 (fr) 2019-11-27

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Application Number Title Priority Date Filing Date
EP13777235.6A Active EP3087311B1 (fr) 2013-10-08 2013-10-08 Lampe

Country Status (5)

Country Link
US (1) US10030862B2 (fr)
EP (1) EP3087311B1 (fr)
CN (2) CN106030204A (fr)
BR (1) BR112016007558A2 (fr)
WO (1) WO2015051810A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
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

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012167945A1 (fr) * 2011-06-08 2012-12-13 Cooper Crouse-Hinds Gmbh Système de refroidissement et luminaire à del contenant celui-ci

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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
KR101220657B1 (ko) * 2008-11-28 2013-01-10 도시바 라이텍쿠 가부시키가이샤 조명기구
WO2010146509A1 (fr) * 2009-06-17 2010-12-23 Koninklijke Philips Electronics N.V. Connecteur pour connecter un composant à un puits de chaleur
EP2366937B1 (fr) 2010-03-18 2017-12-06 GLP German Light Products GmbH Beleuchtungsvorrichtung
DE102010060642B4 (de) 2010-11-18 2019-12-12 HELLA GmbH & Co. KGaA Scheinwerfer mit einer verbesserten Anordnung eines Kühlkörpers
US8915603B2 (en) * 2012-12-05 2014-12-23 Avago Technologies General Ip (Singapore) Pte. Ltd. Cooling system utilizing potential energy

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Publication number Priority date Publication date Assignee Title
WO2012167945A1 (fr) * 2011-06-08 2012-12-13 Cooper Crouse-Hinds Gmbh Système de refroidissement et luminaire à del contenant celui-ci

Also Published As

Publication number Publication date
US20160258612A1 (en) 2016-09-08
EP3087311A1 (fr) 2016-11-02
CN106030204A (zh) 2016-10-12
BR112016007558A2 (pt) 2017-08-01
CN111720806B (zh) 2022-12-27
US10030862B2 (en) 2018-07-24
WO2015051810A1 (fr) 2015-04-16
CN111720806A (zh) 2020-09-29

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