EP3087311A1 - Light fixture - Google Patents

Light fixture

Info

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
Application number
EP13777235.6A
Other languages
German (de)
French (fr)
Other versions
EP3087311B1 (en
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/en
Application granted granted Critical
Publication of EP3087311B1 publication Critical patent/EP3087311B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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.

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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)

Abstract

A light fixture, in particular for use in areas in which there is a risk of explosions, has at least a lighting means, a cooling device for the lighting means and a light fixture housing with a light exit opening, wherein at least the lighting means and the cooling device are arranged in the light fixture housing. In order to improve heat transfer from the lighting means, in particular from the cooling device, to the light fixture housing in a simple and reliable manner without the additional use of a thermally conductive paste or the like, wherein corresponding manufacturing tolerances, which can have a negative influence on good thermal contact, no longer have to be taken into account, the cooling device has, for heat transfer to the light fixture housing, a cooling element of variable length or is in the form of a cooling element of variable length.

Description

Leuchte  lamp
Die Erfindung betrifft eine Leuchte, insbesondere für den Einsatz in explosionsgefährdeten Bereichen, mit wenigstens einem Leuchtmittel, einer Kühleinrichtung für das Leuchtmittel und einem Leuchtengehäuse mit Lichtaustrittsöffnung, wobei im Leuchtengehäuse Leuchtmittel und Kühleinrichtung angeordnet sind. 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.
Bei solchen Leuchten stellt das Leuchtmittel eine Wärmequelle dar, die durch die entsprechende Kühleinrichtung abgekühlt werden muss, was insbesondere im Hinblick auf einen Einsatz in explosionsgefährdeten Bereichen von Vorteil oder auch notwendig ist. In der Regel ist das Leuchtmittel nahe der Kühleinrichtung oder an dieser angeordnet. Als Kühl- einrichtung ist beispielsweise ein Kühlkörper mit entsprechenden Kühlrippen verwendbar. In such luminaires, 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. In general, the lamp is located near the cooling device or at this. As a cooling device, for example, a heat sink with appropriate cooling ribs can be used.
Als Leuchtmittel werden beispielsweise in letzter Zeit häufig LEDs (lichtemittierende Dioden) eingesetzt. Diese sind gegenüber bisher üblichen Leuchtmitteln wirkungsvoller im Hinblick auf eine entsprechende Umsetzung der eingesetzten Energie in sichtbares Licht. Allerdings wird auch bei diesen LEDs nur maximal 30% der eingesetzten Energie in sichtbares Licht umgewandelt. Gerade bei solchen Leuchtmitteln ist es allerdings notwendig, dass diese ausreichend gekühlt werden, da ansonsten deren Lebensdauer, Lichtausbeute oder auch Farbabgabe bei zu hohen Temperaturen negativ beeinflusst wird. Außerdem gilt in der Regel, dass bei Temperaturen von 120°C oder mehr ein entsprechendes Halbleiterkristall der LED geschädigt wird und es so zu bleibenden Beeinträchtigungen von Lebensdauer, Lichtfarbe, Lichtausbeute oder dergleichen kommt. For example, LEDs (light-emitting diodes) 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.
Die bisher verwendeten Kühleinrichtungen sind innerhalb des Leuchtengehäuses so befestigt, dass einerseits eine entsprechende Wärmeübertragung vom Leuchtmittel auf die Kühleinrichtung erfolgen kann und andererseits die Ausrichtung des Leuchtmittels zur entsprechenden Lichtaustrittsöffnung des Leuchtengehäuses gewährleistete ist. Aller- dings können dazu entsprechende Reflexionseinrichtungen zu Hilfe genommen werden. 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. However, corresponding reflection devices can be used for this purpose.
Es hat sich herausgestellt, dass auch sowohl die Kühleinrichtung als auch die entsprechenden Stellen des Leuchtengehäuses, an denen die Kühleinrichtung befestigt ist, Fertigungstoleranzen aufweisen, sodass ein entsprechender Wärmeübertragungskontakt zwischen Kühleinrichtung und Leuchtengehäuse zur Abfuhr der Wärme auf das Gehäuse und schließlich in die Umgebung beeinträchtigt ist. Dies wird zum Teil durch zusätzliches Auftragen einer Wärmeleitpaste oder dergleichen ausgeglichen. It has been found that 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.
Der Erfindung liegt daher die Aufgabe zugrunde, eine Wärmeübertragung vom Leuchtmittel und insbesondere von der Kühleinrichtung auf das Leuchtengehäuse in einfacher und sicherer Weise ohne zusätzliche Verwendung einer Wärmeleitpaste oder dergleichen zu verbessern, wobei entsprechende Fertigungstoleranzen, die einen guten Wärmekontakt negativ beeinflussen können, nicht mehr zu berücksichtigen sind. 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.
Diese Aufgabe wird durch die Merkmale des Patentanspruchs 1 gelöst. Die Erfindung zeichnet sich insbesondere dadurch aus, dass die Kühleinrichtung für einen ausreichen- den Kontakt mit dem Leuchtengehäuse zur Wärmeübertragung ein längenvariables Kühlelement aufweist, oder als solches ausgebildet ist. This object is solved by the features of patent claim 1. 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.
Das längenvariable Kühlelement erstreckt sich zwischen der übrigen Kühleinrichtung und dem Leuchtengehäuse und stellt so auch bei Fertigungstoleranzen einen ausreichenden Kontakt zur Wärmeübertragung her. D.h., dass einerseits ein Kontakt zwischen Kühlein- richtung und Leuchtengehäuse vorliegt, allerdings dieser gegebenenfalls durch die Fertigungstoleranzen negativ beeinflusst wird, sodass über das längenvariable Kühlelement ein zusätzlicher Kontakt hergestellt wird, der jeglichen Wärmeübertragungsverlust aufgrund der Fertigungstoleranzen oder dergleichen ausgleicht. The 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.
Es besteht ebenfalls die Möglichkeit, dass die Kühleinrichtung direkt als ein solches län- genvariables Kühlelement ausgebildet ist, sodass sie in ihren Abmessungen vergrößert oder verkleinert werden kann, um den Kontakt zur entsprechenden Befestigungsstelle im Leuchtengehäuse zu verbessern, oder um weitere Kontakte zum Leuchtengehäuse herzustellen. There is also the possibility that 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.
Je nach Erfordernis und Anordnung der Kühleinrichtung im Leuchtengehäuse wird durch diese Längenvariabilität der Kontakt verbessert oder ein zusätzlicher Kontakt zur Wärmeübertragung auf das Leuchtengehäuse hergestellt. Depending on the requirement and arrangement of the cooling device in the luminaire housing is improved by this length variability of the contact or made an additional contact for heat transfer to the luminaire housing.
D.h. durch das längenvariable Kühlelement wird der direkte Kontakt zwischen der Wärmequelle, d.h. dem Leuchtmittel, und dem Leuchtengehäuse auch bei Fertigungstoleranzen verbessert und in der Regel vergrößert. Umfasst die Kühleinrichtung beispielsweise einen Kühlkörper, kann sich das längenvariable Kühlelement zwischen diesem Kühlkörper und einem passenden Gehäuseteil, insbesondere einer Gehäusewand, erstrecken. Dem Abstand des Kühlkörpers von dem Gehäuseteil wird die Länge des Kühlelements angepasst. Ein einfaches Ausführungsbeispiel für ein solches längenvariables Kühlelement ist beispielsweise eine Kühlfeder. Diese wird einfach zwischen Kühlkörper und Gehäuseteil angeordnet und durch die eigene Federspannung in ihrer Position gehalten. Die Kühlfeder ist aus einem entsprechenden Material mit hoher Wärmeleitfähigkeit gebildet, wie beispielsweise aus einem Metall oder entsprechenden Legierungen. Bei einem weiteren Ausführungsbeispiel kann das längenvariable Kühlelement als te- leskopierbares Kühlelement ausgebildet sein. D.h., dass sich beispielsweise zwei oder mehr ineinander gesteckte und relativ zueinander auseinander schiebbare Rohre zwischen dem Kühlkörper und dem entsprechenden Gehäuseteil erstrecken. This means that the 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. For example, if 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. In a further embodiment, 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.
In diesem Zusammenhang ist es selbstverständlich auch denkbar, dass entsprechende längenvariable Kühlelemente auf verschiedenen Seiten des Kühlkörpers zwischen diesem und einem entsprechendem Gehäuseteil angeordnet sind. Ist der Kühlkörper beispielsweise quaderförmig, können sich von allen Seitenflächen des Kühlkörpers entsprechende längenvariable Kühlelemente vom Kühlkörper zum benachbarten Gehäuseteil erstrecken und den Wärmeübertrag auf das Leuchtengehäuse erheblich verbessern. Die längenvariablen Kühlelemente sind einfach anordbar und in der Regel auch nachrüst- bar ausgebildet. D.h., je nach Erfordernis kann ein solches längenvariables Kühlelement eingebaut werden oder zu bereits vorhandenen längenvariablen Kühlelementen können weiteren hinzugefügt werden. In this context, it is of course also conceivable that corresponding 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.
Bei einem weiteren Ausführungsbeispiel gemäß der Erfindung ist direkt der Kühlkörper längenvariabel. D.h., er kann mit einer Körperfläche auf einer entsprechenden Einrichtung innerhalb des Leuchtengehäuses aufliegen und mit anderen Körperflächen durch seine Längenvariabilität an andere Gehäuseteile und insbesondere die Gehäusewand herangeführt werden, so dass auch dort ein Wärmeübertrag auf das Leuchtengehäuse erfolgen kann. Ein einfaches Ausführungsbeispiel eines solchen längenvariablen Kühlkörpers kann beispielsweise darin gesehen werden, dass dieser zwei ineinander greifende Kühlkörperteile aufweist, die gegeneinander und unter Aufrechterhaltung einer Wärmeübertragung zwischen diesen verschieblich sind. Eine solche Verschiebbarkeit kann sich beispielsweise dadurch ergeben, dass von einem Kühlkörperteil armartige Vorsprünge abstehen, die im anderen Kühlkörperteil in entsprechende Öffnungen verschieblich eingreifen. Dadurch sind die Kühlkörperteile relativ zueinander beweglich, aber bei einer entsprechenden Variation ihrer Ausdehnung bzw. Länge in entsprechender Richtung weiterhin in Wärmeübertragungskontakt. Andere Möglichkeiten zum Ineinandergreifen der Kühlkörperteile und zum Ermöglichen eines relativen Verschiebens der Kühlkörperteile sind denkbar. In a further embodiment according to the invention, 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. As a result, 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.
Um in einfacher Weise die entsprechenden Kühlkörperteile an die Gehäusewände als Gehäuseteile andrücken zu können, können die Kühlkörperteile in Trennrichtung dieser Teile federbelastet sein. D.h., die Kühlkörperteile werden zusammengedrückt in entspre- chende Positionen gebracht und nach Anordnung in der Einbauposition wird der äußere Druck abgebaut, so dass durch die Federbelastung die Kühlkörperteile in Trennrichtung voneinander weg bewegt und in Kontakt mit den Gehäuseteilen gebracht werden. In order to be able to press the corresponding heat sink parts to the housing walls as housing parts in a simple manner, 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.
Um zu verhindern, dass durch die Federbelastung die Kühlkörperteile vollständig voneinander getrennt werden, kann es sich als günstig erweisen, wenn die Kühlkörperteile eine Rückhalteeinrichtung zur Begrenzung der Längenvariabilität in Trennrichtung aufweisen. Eine solche Rückhalteeinrichtung kann ein Rastmechanismus, ein körperlicher Anschlag oder dergleichen sein. In order to prevent that the cooling body parts are completely separated from each other by the spring load, it may prove to be advantageous if the cooling body parts have a retaining device for limiting the length variability in the separating direction. Such a retaining device may be a latching mechanism, a physical stop or the like.
Um einen entsprechenden Wärmeübertragungskontakt zwischen längenvariablem Kühlelement und den entsprechenden Gehäuseteilen zu verbessern, kann das längenvariable Kühlelement an seinen entsprechenden Enden Kühlflächen zur Anlage am Gehäuseteil bzw. am Kühlkörper aufweisen. Diese Kühlflächen können größere Abmessungen aufweisen als die entsprechenden Enden der Kühlelemente. Beispielsweise bei der Kühlfeder, kann diese an ihren Enden flache Kühlplatten als Kühlkörper aufweisen, die insbesondere an die Gehäusewand und entsprechend auch an den Kühlkörper andrückbar sind. Da- durch wird der Flächenkontakt zwischen diesen vergrößert, so dass ein größerer Wärmeübertrag erfolgen kann. Entsprechende Kühlflächen können ebenfalls bei dem telesko- pierbaren Kühlelement an dessen Enden angeordnet sein. In diesem Zusammenhang wäre es weiterhin von Vorteil, wenn die Kühlflächen eine gewisse Flexibilität aufweisen, um sich beispielsweise an entsprechende Krümmungen der Gehäuseteile bzw. des Kühlkörpers einfach anpassen zu können. Um insbesondere bei relativ zueinander verschiebbaren Teilen der Kühleinrichtung eine entsprechende Wärmeübertragung zu verbessern oder den Kontakt zwischen diesen relativ zueinander beweglichen Teilen für eine Wärmeübertragung zu intensivieren, kann ein Wärmeübertragungsmedium zwischen den relativ zueinander verschiebbaren Kühlkörperteilen oder den relativ zueinander verschiebbaren Teilen des teleskopierbaren Kühlele- ments angeordnet sein. Es ist ebenfalls denkbar, dass zusätzlich noch ein solches Wärmeübertragungsmedium zwischen den entsprechenden Kühlflächen und Gehäuseteilen bzw. Kühlkörper angeordnet wird. In order to improve a corresponding heat transfer contact between variable-length cooling element and the corresponding housing parts, the 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. For example, in the cooling spring, 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. 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. In order to improve a corresponding heat transfer, in particular in the case of parts of the cooling device which can be displaced relative to one another, or to intensify the contact between these parts which are movable relative to one another for heat transfer, 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.
Um ein entsprechendes längenvariables Kühlelement in einfacher Weise an unterschiedliche Einbausituationen und unterschiedliche Leuchtengehäuse anpassen zu können, kann es sich als vorteilhaft erweisen, wenn zumindest die Kühlfächern austauschbar sind. D.h., dass beispielsweise eine Kühlfläche mit bestimmter Geometrie und Krümmung durch eine andere Kühlfläche ersetzt wird, die besser an dem entsprechenden Gehäuseteil bzw. Kühlkörper zur Wärmeübertragung anliegt. In order to adapt a corresponding variable length cooling element in a simple manner to different installation situations and different light housing, it may prove advantageous if at least the 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.
Durch die Erfindung besteht in einfacher Weise die Möglichkeit, das entsprechende Leuchtmittel direkt auf dem Kühlkörper oder am Kühlkörper anzuordnen. Dies gilt natürlich auch, wenn nicht nur ein Leuchtmittel, sondern eine Mehrzahl oder Vielzahl solcher Leuchtmittel am Kühlkörper bzw. auf dem Kühlkörper angeordnet sind. Ein Beispiel für ein solches Leuchtmittel ist eine einzelne LED oder eine Mehrzahl von LEDs, die beispielsweise in Form von LED-Leuchtstreifen, LED-Spots, LED-Stripes oder dergleichen vorlie- gen. 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. Of course, this also applies if not only 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.
Im Folgenden werden vorteilhafte Ausführungsbeispiele der Erfindung anhand der in der Zeichnung beigefügten Figuren näher erläutert. In the following advantageous embodiments of the invention will be explained in more detail with reference to the accompanying figures in the drawing.
Es zeigen: Show it:
Figur 1 eine Prinzipdarstellung einer Leuchte mit erfindungsgemäßer Kühleinrichtung und Figur 2 einen Schnitt entlang der Linie ll-il aus Figur 1 für ein weiteres Ausführungsbeispiel der Erfindung. 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.
In Figur 1 ist eine Seitenansicht in Form eines Querschnitts durch eine erfindungsgemäße Leuchte 1 dargestellt. Diese umfasst ein Leuchtengehäuse 4 in dem zumindest eine An- zahl von Leuchtmitteln 2 und eine zugeordnete Kühleinrichtung 3 angeordnet sind. Weitere elektrische oder elektronische Einrichtungen und auch Reflektionseinrichtungen sind zur Vereinfachung in Figur 1 nicht dargestellt. 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.
Die Kühleinrichtung 3 umfasst beispielsweise einen Kühlkörper 7 in Form eines Quaders oder dergleichen, an dem allerdings auch Kühlrippen angeordnet sein können. Auf einer einer Lichtaustrittsöffnung 5 des Leuchtengehäuses 4 zuweisenden Oberseite des Kühlkörpers 7 sind drei Leuchtmittel 2 in Form von LEDs (lichtemittierenden Dioden) dargestellt. Es ist selbstverständlich, dass auch mehr solcher LEDs 2 angeordnet werden können. Außerdem muss zwischen den Leuchtmitteln kein entsprechender Abstand vorliegen, sondern sie können beispielsweise in Form eines LED-Leuchtbandes oder -Stripes direkt auf dem Kühlkörper angeordnet sein. 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. On one of a light exit opening 5 of the lamp housing 4 zuweisenden top of the heat sink 7, three bulbs 2 in the form of LEDs (light emitting diodes) are shown. It goes without saying that more such LEDs 2 can be arranged. In addition, there must be no corresponding distance between the light sources, but instead they can be arranged directly on the heat sink, for example in the form of an LED light strip or strip.
Erfindungsgemäß ist außer dem Kühlkörper 7 als Teil der Kühleinrichtung 3 ein zusätzliches Kühlelement in Form eines längenvariablen Kühlelements 6 angeordnet. Einseitig zum Kühlkörper 7 ist beispielsweise ein solches längenvariables Kühlelement 6 in Form einer Kühlfeder 10 angeordnet. Diese erstreckt sich zwischen einer Endseite des Kühl- körpers 7 und einem Gehäuseteil 8 in Form einer Gehäusewand 9. Die Kühlfeder 10 drückt mit ihren beiden Enden auf der einen Seite gegen die Gehäusewand 9 und auf der anderen Seite gegen den Kühlkörper 7. Zur Vergrößerung der Kontaktfläche kann die Kühlfeder an ihren Enden Kühlflächen 15 bzw. 16 aufweisen. Diese sind mit der Kühlfeder 10 verbunden und liegen flächig an Gehäusewand 9 bzw. Kühlkörper 7 an. Die Kühlflächen 15, 16 können austauschbar und/oder flexibel ausgebildet sein. Durch die Flexibilität erfolgt eine bessere Anpassung an ggf. gekrümmte Flächen der Gehäusewand 9 bzw. des Kühlkörpers 7. Es besteht ebenfalls die Möglichkeit, dass entsprechende Kühlflächen 15, 16 Strukturen aufweisen, die zu Strukturen von Gehäusewand 9 bzw. Kühlkörper 7 komplementär sind. Auf der anderen Seite des Kühlkörpers 7 ist ein weiteres Ausführungsbeispiel eines längenvariablen Kühlelements 6 in Form eines teleskopierbaren Kühlelements 11 angeord- net. Dieses umfasst beispielsweise zwei ineinander geschobene Rohrelemente, die längsvariabel auseinander und ineinander schiebbar sind. Die dargestellte Form des te- leskopierbaren Kühlelements 11 ist nur beispielhaft, wobei rohrförmige, schienenförmige oder andere teleskopierbare Elemente verwendbar sind. Auch bei diesem teleskopierba- ren Kühlelement 11 ist es von Vorteil, wenn die entsprechenden Teleskopelemente federbelastet in Ausschubrichtung sind. According to the invention, 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. On one side of the heat sink 7, for example, such 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. To enlarge the Contact surface, 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. On the other side of the heat sink 7, another embodiment of 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.
Der Kühlkörper 7 liegt auf einer Lagerfläche 18 auf und steht mit dieser in Wärmeübertragungskontakt. Durch die teleskopierbaren Kühlelemente 6 wird ein weiterer Wärmeübertragungskontakt zu entsprechenden Stellen des Leuchtengehäuses 4 und insbesondere zur Gehäusewand 9 als entsprechendem Gehäuseteil 8 hergestellt. The heat sink 7 rests on a bearing surface 18 and is in heat transfer contact with it. By the telescopic cooling elements 6, 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.
In Figur 2 ist ein Schnitt entlang der Linie II-II aus Figur 1 für ein weiteres Ausführungsbeispiel der Erfindung dargestellt. Bei diesem Ausführungsbeispiel ist der Kühlkörper 7 direkt als längenvariables Kühlelement 6 ausgebildet. D.h., der Kühlkörper 7 besteht aus zumindest zwei Kühlkörperteilen 12 bzw. 13, die relativ zueinander ineinander und auseinander schiebbar sind. Der entsprechende Kühlkörper 7 ist auf der Lagerfläche 18 angeordnet, kann allerdings durch Ausschub des Kühlkörperteils 12 bzw. 13 einen weiteren Kontakt zu einer Gehäusewand 9 als Gehäuseteil 8 herstellen. In Figur 2 sind die beiden Kühlkörperteile 12, 13 noch zusammengedrückt und nicht unter Ausnutzung ihrer Längenvariabilität zusätzlich in Kontakt mit der Gehäusewand 9 dargestellt. Zwischen den beiden Kühlkör- perteilen 12, 13 können Federelemente 17 angeordnet sein, die ein Auseinanderschieben der Kühlkörperteile 12, 13 in Trennrichtung 14 unterstützen. D.h., wird ein Ausschieben des Kühlkörperteils 12 aus Kühlkörperteil 13 zugelassen, bewegt sich dieses aufgrund der Federbelastung durch die Federelemente 17 bis zur Anlage an die Gehäusewand 9. Dadurch wird ein weiterer Wärmekontakt zum Leuchtengehäuse 4 hergestellt, der ggf. eine Beeinträchtigung eines Wärmekontakts zwischen Kühlkörper 7 und Lagerfläche 18 aufgrund von Fertigungstoleranzen oder dergleichen zumindest kompensiert. FIG. 2 shows a section along the line II-II from FIG. 1 for a further exemplary embodiment of the invention. In this embodiment, 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. Between the two heat sink parts 12, 13, 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.
Andere Arten des Zusammenwirkens der Kühlkörperteile 12 und 13 sind denkbar. Bei dem dargestellten Ausführungsbeispiel greifen beide Kühlkörperteile 12, 13 kammartig ineinander. Nicht dargestellt in Figur 2 ist ein Rückhaltemechanismus, der beispielsweise ein zu weites Trennen von Kühlkörperteil 12 von Kühlkörperteil 13 in Trennrichtung 14 verhindert, so dass immer ein bestimmtes Ineinandergreifen der beiden Kühlkörperteile 12 und 13 gewährleistet ist. Ein solcher Rückhaltemechanismus kann beispielsweise ein Rastmechanismus, ein mechanischer Anschlag oder dergleichen sein. Other types of interaction of the heat sink parts 12 and 13 are conceivable. In the illustrated embodiment, both heat sink parts 12, 13 engage in one another like a comb. Not shown in Figure 2 is 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. Such a retaining mechanism may be for example a latching mechanism, a mechanical stop or the like.
Zwischen den relativ zueinander beweglichen Teilen von beispielsweise teleskopierbarem Kühlelement 11 bzw. Kühlkörperteilen 12 und 13 kann zur besseren Ankopplung und Wärmeübertragung ein entsprechendes Wärmeleitmedium aufgetragen sein. Between the relatively movable parts of, for example, 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.
Erfindungsgemäß ergibt sich eine einfache Möglichkeit entsprechende Fertigungstoleranzen bei der Herstellung von Leuchte und Kühleinrichtung auszugleichen, die ggf. eine Wärmeübertragung zwischen diesen Teilen negativ beeinflussen. Dazu weist die Kühlein- richtung ein längenvariables Kühlelement auf, das in der Regel einen weiteren Kontakt zwischen einem Kühlelement der Kühleinrichtung und einem entsprechenden Gehäuseteil des Leuchtengehäuses herstellt. Dadurch wird insgesamt die Wärmeübertragung von der Wärmequelle, d.h. dem oder den Leuchtmitteln auf das Leuchtengehäuse verbessert, wobei dieses entsprechend Wärme an die Umgebung abgeben kann. Durch die Verwendung des längenvariablen Kühlelements ist bei vielen Ausführungsbeispielen für eine Leuchte eine zusätzliche aktive Kühlung der Leuchtmittel beispielsweise in Form eines Ventilators oder dergleichen nicht mehr notwendig. According to the invention results in a simple way to compensate for corresponding manufacturing tolerances in the manufacture of light and cooling device, which may negatively affect a heat transfer between these parts. For this purpose, 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. As a result, overall 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. By using 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.

Claims

Ansprüche claims
1. Leuchte (1), insbesondere für den Einsatz in explosionsgefährdeten Bereichen, mit wenigstens einem Leuchtmittel (2), einer Kühleinrichtung (3) für das Leuchtmittel (2) und einem Leuchtengehäuse (4) mit Lichtaustrittsöffnung (5) in welchem Leuchtengehäuse (4) zumindest Leuchtmittel und Kühleinrichtung (3) angeordnet sind, dadurch gekennzeichnet, dass die Kühleinrichtung (3) zur Wärmeübertragung auf das Leuchtengehäuse (4) ein längsvariables Kühlelement (6) aufweist oder als solches ausgebildet ist. 1. Lamp (1), in particular for use in potentially explosive atmospheres, with at least one light source (2), a cooling device (3) for the light source (2) and a light housing (4) with light exit opening (5) in which light housing (4 ) at least lighting means and cooling device (3) are arranged, characterized in that the cooling device (3) for heat transfer to the lamp housing (4) has a längsvariables cooling element (6) or is designed as such.
2. Leuchte nach Anspruch 1 , dadurch gekennzeichnet, dass das längsvariable Kühlelement (6) sich zwischen einem Kühlkörper (7) der Kühleinrichtung (3) und einem Gehäuseteil (8), insbesondere Gehäusewand (9), erstreckt. 2. Lamp according to claim 1, characterized in that the longitudinally variable cooling element (6) extends between a heat sink (7) of the cooling device (3) and a housing part (8), in particular housing wall (9).
3. Leuchte nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das längsvariable Kühlelement (6) als Kühlfeder (10) ausgebildet ist. 3. Lamp according to claim 1 or 2, characterized in that the longitudinally variable cooling element (6) is designed as a cooling spring (10).
4. Leuchte nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das längsvariable Kühlelement (6) als teleskopierbares Kühlelement (11) ausgebildet ist. 4. Lamp according to one of the preceding claims, characterized in that the longitudinally variable cooling element (6) is designed as a telescopic cooling element (11).
5. Leuchte nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass längsvariable Kühlelemente (6) auf verschiedenen Seiten des Kühlkörpers (7) zwischen diesem und dem entsprechenden Gehäuseteil (8) angeordnet sind. 5. Lamp according to one of the preceding claims, characterized in that longitudinally variable cooling elements (6) on different sides of the heat sink (7) between the latter and the corresponding housing part (8) are arranged.
6. Leuchte nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das längsvariable Kühlelement (6) nachrüstbar ist. 6. Lamp according to one of the preceding claims, characterized in that the longitudinally variable cooling element (6) can be retrofitted.
7. Leuchte nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Kühlkörper (7) längsvariabel ist. 7. Lamp according to one of the preceding claims, characterized in that the cooling body (7) is variable in length.
8. Leuchte nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Kühlkörper (7) zwei ineinandergreifende Kühlkörperteile (12, 13) aufweist, die gegeneinander unter Aufrechterhaltung eines Wärmeübertragungskontakts verschieblich sind. 8. Light according to one of the preceding claims, characterized in that the cooling body (7) has two interlocking heat sink parts (12, 13) which are mutually displaceable while maintaining a heat transfer contact.
9. Leuchte nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Kühlkörperteile (12, 13) in Trennrichtung (14) der Kühlkörperteile federbelastet sind. 9. Lamp according to one of the preceding claims, characterized in that the cooling body parts (12, 13) in the separating direction (14) of the heat sink parts are spring-loaded.
10. Leuchte nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Kühlkörperteile (12, 13) eine Rückhalteeinrichtung zur Begrenzung der Längenvariation in Trennrichtung (14) aufweisen. 10. Luminaire according to one of the preceding claims, characterized in that the cooling body parts (12, 13) have a retaining device for limiting the length variation in the separating direction (14).
11. Leuchte nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das längsvariable Kühlelement (6) an seinen Enden Kühlflächen (15, 16) zur Anlage am zugeordneten Gehäuseteil (8) bzw. am Kühlkörper (7) aufweist. 11. Luminaire according to one of the preceding claims, characterized in that the longitudinally variable cooling element (6) at its ends cooling surfaces (15, 16) for abutment with the associated housing part (8) or on the heat sink (7).
12. Leuchte nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass ein Wärmeübertragungsmedium zwischen Kühlflächen (15, 16) bzw. längsvariablem Kühlelement (6) und Gehäuseteil (8) bzw. Kühlkörper (7) und/oder zwischen den relativ zueinander verschiebbaren Kühlkörperteilen (12, 13) angeordnet ist. 12. Luminaire according to one of the preceding claims, characterized in that a heat transfer medium between cooling surfaces (15, 16) or längsvariablem cooling element (6) and housing part (8) or heat sink (7) and / or between the relatively movable heat sink parts ( 12, 13) is arranged.
13. Leuchte nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Kühlflächen (15, 16) austauschbar sind. 13. Light according to one of the preceding claims, characterized in that the cooling surfaces (15, 16) are interchangeable.
14. Leuchte nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das Leuchtmittel (2) am Kühlkörper (7) angeordnet ist. 14. Light according to one of the preceding claims, characterized in that the lighting means (2) on the heat sink (7) is arranged.
15. Leuchte nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das Leuchtmittel (2) eine einzelne LED oder eine Mehrzahl von LEDs aufweist. 15. Light according to one of the preceding claims, characterized in that the lighting means (2) comprises a single LED or a plurality of LEDs.
EP13777235.6A 2013-10-08 2013-10-08 Light fixture Active EP3087311B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2013/003021 WO2015051810A1 (en) 2013-10-08 2013-10-08 Light fixture

Publications (2)

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

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Application Number Title Priority Date Filing Date
EP13777235.6A Active EP3087311B1 (en) 2013-10-08 2013-10-08 Light fixture

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US (1) US10030862B2 (en)
EP (1) EP3087311B1 (en)
CN (2) CN106030204A (en)
BR (1) BR112016007558A2 (en)
WO (1) WO2015051810A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUA20161520A1 (en) * 2016-03-10 2017-09-10 A A G Stucchi S R L DEVICE HEAT SINK IN PARTICULAR FOR THE USE IN A TUBULAR LIGHTING APPARATUS AND TUBULAR LIGHTING EQUIPMENT USING THE SAME

Family Cites Families (10)

* Cited by examiner, † Cited by third party
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 (en) * 2002-12-16 2004-07-15 Daimlerchrysler Ag Headlamp unit for a motor vehicle
DE102006001711B4 (en) * 2006-01-13 2008-10-30 Audi Ag Lighting device for a motor vehicle
KR101014485B1 (en) * 2008-05-07 2011-02-14 현대자동차주식회사 Adaptive Front Lighting System Having Advanced Efficiency for Radiant Heat
EP2336631B1 (en) 2008-11-28 2017-10-25 Toshiba Lighting&Technology Corporation Lighting device
KR101814194B1 (en) * 2009-06-17 2018-01-02 필립스 라이팅 홀딩 비.브이. A connector for connecting a component to a heat sink
EP2366937B1 (en) * 2010-03-18 2017-12-06 GLP German Light Products GmbH Illumination apparatus
DE102010060642B4 (en) * 2010-11-18 2019-12-12 HELLA GmbH & Co. KGaA Headlamp with an improved arrangement of a heat sink
DE102011103605B4 (en) * 2011-06-08 2015-09-10 Cooper Crouse-Hinds Gmbh COOLING SYSTEM AND LED-BASED LIGHT, LEGALLY SELF
US8915603B2 (en) * 2012-12-05 2014-12-23 Avago Technologies General Ip (Singapore) Pte. Ltd. Cooling system utilizing potential energy

Also Published As

Publication number Publication date
US10030862B2 (en) 2018-07-24
US20160258612A1 (en) 2016-09-08
CN111720806B (en) 2022-12-27
EP3087311B1 (en) 2019-11-27
CN106030204A (en) 2016-10-12
BR112016007558A2 (en) 2017-08-01
WO2015051810A1 (en) 2015-04-16
CN111720806A (en) 2020-09-29

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