EP2375148A2 - Reflector lamp - Google Patents

Reflector lamp Download PDF

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Publication number
EP2375148A2
EP2375148A2 EP11002446A EP11002446A EP2375148A2 EP 2375148 A2 EP2375148 A2 EP 2375148A2 EP 11002446 A EP11002446 A EP 11002446A EP 11002446 A EP11002446 A EP 11002446A EP 2375148 A2 EP2375148 A2 EP 2375148A2
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EP
European Patent Office
Prior art keywords
reflector
light
emitting diodes
rod
heat
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.)
Withdrawn
Application number
EP11002446A
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German (de)
French (fr)
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EP2375148A3 (en
Inventor
Joachim Becker
Norbert Fernkorn
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Spittler Lichttechnik
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Spittler Lichttechnik
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Publication date
Application filed by Spittler Lichttechnik filed Critical Spittler Lichttechnik
Publication of EP2375148A2 publication Critical patent/EP2375148A2/en
Publication of EP2375148A3 publication Critical patent/EP2375148A3/en
Withdrawn legal-status Critical Current

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    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F21V7/06—Optical design with parabolic curvature
    • 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
    • F21V29/51—Cooling arrangements using condensation or evaporation of a fluid, e.g. 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
    • 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
    • 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
    • F21Y2107/00—Light sources with three-dimensionally disposed light-generating elements
    • F21Y2107/30—Light sources with three-dimensionally disposed light-generating elements on the outer surface of cylindrical surfaces, e.g. rod-shaped supports having a circular or a polygonal cross section
    • 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 reflector lamp comprising a reflector and a light source arranged in a defined region of the reflector, whose radiated light is predominantly reflected by the reflector.
  • Such reflector lamps are known in numerous embodiments.
  • the shape of the reflectors is adapted to the respective applications.
  • parabolic reflectors which are rotationally symmetric about a central axis and in which a light source is arranged in the common focus of the parabola.
  • the light emitted from the focus of the parabolas exits a reflector aperture in parallel when reflected at the reflector surface.
  • Such a luminaire is suitable for a uniform illumination of a room, since the uniformity of the illumination does not change over the axial distance from the reflector luminaire.
  • Targeted other radiation angles can be realized by other shapes of the reflector.
  • the light sources used in reflector lights are essentially regarded as point light sources to determine the required position.
  • the axial and radial extent of the light source causes the image of the light source after the reflection on the reflector does not appear punctiform, but expanded in space.
  • a reflector lamp for example, for the formation of a downlight, it is known to use an array of LEDs as a light source. Since the individual LEDs are usually delivered with their own lenses in their cases, such downlights are formed without reflectors, since the directly emitted light of the LEDs is used.
  • Such a light-emitting diode arrangement is for example off EP 1 783 421 A1 known.
  • the light source has a plurality of light-emitting diodes arranged on a circuit board.
  • the board is provided on its back with a rod-shaped tube, which is designed as a heat pipe, that includes a longitudinally circulating heat transfer medium.
  • a heat sink with a large sauceabstrahlober Structure is arranged at the other end of the heat pipe. Such an arrangement encounters with respect to the amount of heat dissipated to its limits.
  • the present invention has for its object to provide a reflector lamp that allows the emission of high light output with high efficiency.
  • a reflector lamp of the type mentioned above is characterized in that the light source is formed by a plurality of light-emitting diodes, that the light-emitting diodes are arranged on a lateral surface of a hollow cylindrical LED holder and that in the cylindrical cavity of the LED holder, a rod made of thermally conductive material used in heat-conductive contact, the protrudes from the reflector and is connected outside of the reflector with a heat sink.
  • the rod is thereby inserted into the cavity of the light-emitting diode carrier and preferably designed as a heat pipe.
  • the reflector luminaire according to the invention thus enables the arrangement of a plurality of LEDs in a manner that allows a controlled emission of the light of the LEDs by the light emitting diodes radially radiate from the LED and thereby reaches virtually the entire light of the LEDs on the surface of the reflector and from there is reflected off.
  • the light is - depending on the nature of the reflector - controlled emitted as parallel or substantially parallel light or focused on a small area to realize a spot lighting.
  • the light-emitting diodes are preferably distributed uniformly over the circumferential angle of the cylindrical light-emitting diode carrier, for example in one or more groups, which are each located at the same axial height of the cylindrical light-emitting diode carrier.
  • the LEDs should be as close as possible to the desired focal point position of the reflector for a specific application.
  • the hollow-cylindrical light-emitting diode carrier according to the invention is preferably positioned in a center axis of the reflector about which the reflector is rotationally symmetrical.
  • a rod of thermally conductive material is used in heat-conducting contact in the cylindrical cavity of the LED array. This rod protrudes out of the reflector and is outside the reflector connected to a heat sink. This makes it possible to equip a reflector lamp with LEDs so that a high emission power is generated.
  • light emitting diodes In an arrangement with 18 light-emitting diodes, which are arranged offset in three groups on three axial heights of the lateral surface of the hollow cylindrical LED support each at an angular distance of 60 ° to each other, light emitting diodes can be operated with a total electrical power of 70 W, for example.
  • FIG. 1 shows a light-emitting diode holder 1, which consists of a hollow body 2 with a circular cylindrical cross-section and a flared extension piece 3, which merges into an annular flange 4.
  • the cylindrical hollow body 2 is closed at its end opposite the flange 4 by an end wall, so that it forms a one-sided axially open interior.
  • the cylindrical hollow body 2 has an outer circumferential surface 5, on which light-emitting diodes 6 are located.
  • the LEDs 6 are arranged in this embodiment with respect to the longitudinal axis of the cylindrical hollow body 2 in three groups one behind the other with a small distance.
  • Each of the groups of light-emitting diodes 6 has six light-emitting diodes which are distributed uniformly at the same axial height on the circular-cylindrical circumference of the lateral surface 5, so that between each two adjacent light-emitting diodes on the circumferential line a circumferential angle of 60 ° exists,
  • FIG. 2 illustrates that the light-emitting diode holder 1 is used with its LEDs 6 in a reflector 7.
  • the reflector 7 is for example a parabolic reflector 7 which is rotationally symmetrical about a central axis 8.
  • the reflector 7 thus has a parabolic reflector body 9, which has a through opening 10 around the center axis 8, into which the light-emitting diode holder 1 is inserted and which is so large that the flange 4 limits the insertion movement of the light-emitting diode body 1 into the interior of the reflector 7 ,
  • the dimensioning of the light-emitting diode holder 1 is chosen so that the middle group of the LEDs 6 is located at the height of the focal point of the parabolic reflector 7.
  • the axially adjacent LEDs 6 are therefore located near the focal point.
  • the light-emitting diodes 6 radiate their light radially from the center axis 8 of the reflector 7, so that virtually all of the radiated light falls on the inside of the reflector 7 and thus is reflected in a controlled manner by the reflector 7 and the reflector 7 through an output opening 11 as substantially parallel Aligned light leaves.
  • the outlet opening 11 is located at the height of the largest diameter of the reflector. 7
  • a heat pipe 12 In the one-sided open interior of the cylindrical hollow body is fit, preferably in a press fit, a heat pipe 12 is used, which extends far beyond the flange 4 - and thus outside of the reflector 7.
  • a heat pipe 12 (heat pipe) contains a plurality of fine channels in the longitudinal direction, which are interconnected end, so that a introduced into the heat pipe 12 cooling liquid in the longitudinal direction of the heat pipe 12 circulates and thus heat from the end inserted into the cylindrical hollow body 2 heat pipe 12 to the free end of the heat pipe 12 outside the reflector 7 dissipates.
  • FIG. 3 illustrates that on the heat pipe 12, a solid heat sink 13 is applied in a heat-conductive contact with the heat pipe 12, so that the heat sink 3 absorb the heat transported away from the heat pipe 12 due to its large heat capacity quickly and its high surface area to the environment can deliver.
  • the reflector lamp thus formed thus combines the advantages of a conventional reflector lamp, in which the light is emitted in a controlled manner through the outlet opening 11, with the advantages of a light source which is constructed with a plurality of light-emitting diodes 6.
  • the rotationally symmetrical arrangement of the reflector 7 is received by the light-emitting diodes 6 are arranged on a cylindrical hollow body 2 with a circular cylindrical surface 5 and are distributed over a circumferential line of the lateral surface 5 at equal angular intervals.
  • This uniform illumination leads to a uniform emission of directed light through the exit opening 11 of the reflector 7.
  • the use of the circular cylindrical hollow body 2 as a light-emitting diode holder 1 also allows the use of a rod-shaped heat conductor, preferably in the form of a heat pipe 12, for effective heat dissipation into the cooling body 13 inside.
  • the light-emitting diode holder 1 which is provided via the extension piece 3 with the insertion movement into the interior of the reflector 7 limiting flange, forces the correct positioning of the light emitting diodes 6 in the interior of the reflector 7 at the desired location, for example, near the focal point of parabolic reflector 7.
  • the reflector lamp according to the invention is extremely simple and ensures safe assembly. Due to the effective cooling, in particular via the heat pipe 12, can thus be realized in a simple and cost-effective manner, a reflector lamp with a very high light output.

Abstract

The lamp has a light source arranged in a defined region of a reflector (7), where radiated light of the light source is directly and predominantly reflected by the reflector. The light source is formed by a set of LEDs arranged on outer surface of a hollow cylindrical LED carrier (1). A foster pipe (12) is inserted into a cylindrical cavity of the LED carrier, made up of heat conducting material and used in heat conducting contact. A rod is protruded from the reflector and connected with a cooling body (13) on an outer side of the reflector.

Description

Die Erfindung betrifft eine Reflektorleuchte mit einem Reflektor und einer in einem definierten Bereich des Reflektors angeordneten Lichtquelle, deren abgestrahltes Licht überwiegend vom Reflektor gerichtet reflektiert wird.The invention relates to a reflector lamp comprising a reflector and a light source arranged in a defined region of the reflector, whose radiated light is predominantly reflected by the reflector.

Derartige Reflektorleuchten sind in zahlreichen Ausführungsformen bekannt. Die Form der Reflektoren wird dabei den jeweiligen Anwendungsfällen angepasst. So ist es bekannt, parabolische Reflektoren zu verwenden, die um eine Mittenachse rotationssymmetrisch sind und bei denen eine Lichtquelle im gemeinsamen Brennpunkt der Parabel angeordnet ist. Das aus dem Brennpunkt der Parabeln ausgesandte Licht tritt aus einer Reflektoröffnung parallel aus, wenn es an der Reflektoroberfläche reflektiert worden ist. Eine derartige Leuchte eignet sich für eine gleichmäßige Ausleuchtung eines Raums, da sich die Gleichmäßigkeit der Ausleuchtung über den axialen Abstand von der Reflektorleuchte nicht ändert.Such reflector lamps are known in numerous embodiments. The shape of the reflectors is adapted to the respective applications. Thus, it is known to use parabolic reflectors which are rotationally symmetric about a central axis and in which a light source is arranged in the common focus of the parabola. The light emitted from the focus of the parabolas exits a reflector aperture in parallel when reflected at the reflector surface. Such a luminaire is suitable for a uniform illumination of a room, since the uniformity of the illumination does not change over the axial distance from the reflector luminaire.

Es ist ferner bekannt, ellipsoide Reflektoren zu verwenden, wobei die Lichtquelle in einem Brennpunkt der Ellipse angeordnet ist. Das an dem Reflektor reflektierte Licht wird dabei in dem zweiten Brennpunkt der Ellipse gesammelt. Eine derartige Reflektoranordnung eignet sich daher beispielsweise für eine Spot-Beleuchtung.It is also known to use ellipsoidal reflectors, wherein the light source is disposed at a focal point of the ellipse. The light reflected at the reflector is thereby collected in the second focal point of the ellipse. Such a reflector arrangement is therefore suitable, for example, for spot lighting.

Gezielte andere Abstrahlwinkel lassen sich durch andere Formgebungen des Reflektors realisieren.Targeted other radiation angles can be realized by other shapes of the reflector.

Die bei Reflektorleuchten verwendeten Lichtquellen werden im Wesentlichen als punktförmige Lichtquellen angesehen, um die benötigte Position zu bestimmen. Die axiale und radiale Ausdehnung der Lichtquelle führt dazu, dass das Bild der Lichtquelle nach der Reflektion am Reflektor nicht punktförmig erscheint, sondern im Raum ausgedehnt. Für manche Anwendungsfälle einer Reflektorleuchte, beispielsweise für die Ausbildung eines Downlights, ist es bekannt, ein Array von Leuchtdioden als Lichtquelle zu verwenden. Da die einzelnen Leuchtdioden üblicherweise mit eigenen Linsen in ihren Gehäusen ausgeliefert werden, werden derartige Downlights ohne Reflektoren ausgebildet, da das direkt ausgesendete Licht der Leuchtdioden verwendet wird. Eine derartige Leuchtdiodenanordnung ist beispielsweise aus EP 1 783 421 A1 bekannt. Die Lichtquelle weist dabei eine Mehrzahl von auf einer Platine angeordneten Leuchtdioden auf. Um die beim Betrieb der Leuchtdioden produzierte erhebliche Wärme abzutransportieren, ist die Platine auf ihrer Rückseite mit einem stabförmigen Rohr versehen, das als heat pipe ausgebildet ist, also ein längs zirkulierendes Wärmeübertragungsmedium beinhaltet. Am anderen Ende der heat pipe ist ein Kühlkörper mit einer großen Wärmeabstrahloberfläche angeordnet. Eine derartige Anordnung stößt bezüglich der abgeleiteten Wärmemenge an ihre Grenzen.The light sources used in reflector lights are essentially regarded as point light sources to determine the required position. The axial and radial extent of the light source causes the image of the light source after the reflection on the reflector does not appear punctiform, but expanded in space. For some applications of a reflector lamp, for example, for the formation of a downlight, it is known to use an array of LEDs as a light source. Since the individual LEDs are usually delivered with their own lenses in their cases, such downlights are formed without reflectors, since the directly emitted light of the LEDs is used. Such a light-emitting diode arrangement is for example off EP 1 783 421 A1 known. In this case, the light source has a plurality of light-emitting diodes arranged on a circuit board. In order to remove the considerable heat produced during the operation of the LEDs, the board is provided on its back with a rod-shaped tube, which is designed as a heat pipe, that includes a longitudinally circulating heat transfer medium. At the other end of the heat pipe, a heat sink with a large Wärmeabstrahloberfläche is arranged. Such an arrangement encounters with respect to the amount of heat dissipated to its limits.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Reflektorleuchte zu ermöglichen, die die Abstrahlung einer hohen Lichtleistung mit einem hohen Wirkungsgrad ermöglicht.The present invention has for its object to provide a reflector lamp that allows the emission of high light output with high efficiency.

Zur Lösung dieser Aufgabe wird erfindungsgemäß eine Reflektorleuchte der eingangs erwähnten Art dadurch gekennzeichnet, dass die Lichtquelle durch eine Mehrzahl von Leuchtdioden gebildet ist, dass die Leuchtdioden auf einer Mantelfläche eines hohlzylindrischen Leuchtdiodenträgers angeordnet sind und dass in den zylindrischen Hohlraum des Leuchtdiodenträgers ein Stab aus wärmeleitendem Material in wärmeleitendem Kontakt eingesetzt ist, der aus dem Reflektor herausragt und außerhalb des Reflektors mit einem Kühlkörper verbunden ist. Vorzugsweise ist der Stab dabei passig in den Hohlraum des Leuchtdiodenträgers eingesetzt und bevorzugt als heat pipe ausgebildet.To achieve this object, a reflector lamp of the type mentioned above is characterized in that the light source is formed by a plurality of light-emitting diodes, that the light-emitting diodes are arranged on a lateral surface of a hollow cylindrical LED holder and that in the cylindrical cavity of the LED holder, a rod made of thermally conductive material used in heat-conductive contact, the protrudes from the reflector and is connected outside of the reflector with a heat sink. Preferably, the rod is thereby inserted into the cavity of the light-emitting diode carrier and preferably designed as a heat pipe.

Die erfindungsgemäße Reflektorleuchte ermöglicht somit die Anordnung einer Vielzahl von Leuchtdioden in einer Weise, die eine kontrollierte Abstrahlung des Lichts der Leuchtdioden ermöglicht, indem die Leuchtdioden von dem Leuchtdiodenträger radial abstrahlt und dadurch praktisch das gesamte Licht der Leuchtdioden auf die Oberfläche des Reflektors gelangt und von dort aus gerichtet reflektiert wird. Dabei wird das Licht - je nach Art des Reflektors - kontrolliert als paralleles oder im Wesentlichen paralleles Licht ausgesandt oder auf einen kleinen Bereich fokussiert, um eine Spotbeleuchtung zu realisieren. Dabei sind die Leuchtdioden vorzugsweise über den Umfangswinkel des zylindrischen Leuchtdiodenträgers gleichmäßig verteilt, beispielsweise in einer oder mehreren Gruppen, die sich jeweils auf der gleichen axialen Höhe des zylindrischen Leuchtdiodenträgers befinden. Es ist allerdings auch möglich, eine räumlich gleichmäßige Lichtverteilung mit anderen Verteilungsmustern der Leuchtdioden, beispielsweise mit einer spiralförmigen Anordnung der Leuchtdioden auf der Mantelfläche des zylindrischen Leuchtdiodenträgers, anzustreben.The reflector luminaire according to the invention thus enables the arrangement of a plurality of LEDs in a manner that allows a controlled emission of the light of the LEDs by the light emitting diodes radially radiate from the LED and thereby reaches virtually the entire light of the LEDs on the surface of the reflector and from there is reflected off. The light is - depending on the nature of the reflector - controlled emitted as parallel or substantially parallel light or focused on a small area to realize a spot lighting. In this case, the light-emitting diodes are preferably distributed uniformly over the circumferential angle of the cylindrical light-emitting diode carrier, for example in one or more groups, which are each located at the same axial height of the cylindrical light-emitting diode carrier. However, it is also possible to seek a spatially uniform light distribution with other distribution patterns of the light-emitting diodes, for example with a spiral arrangement of the LEDs on the lateral surface of the cylindrical light-emitting diode carrier.

Bei einem paraboloiden oder ellipsoiden Reflektor sollten sich die Leuchtdioden möglichst nahe der für einen speziellen Anwendungsfall angestrebten Brennpunktposition des Reflektors befinden.In a parabolic or ellipsoidal reflector, the LEDs should be as close as possible to the desired focal point position of the reflector for a specific application.

Der erfindungsgemäße hohlzylindrische Leuchtdiodenträger ist vorzugsweise in einer Mittenachse des Reflektors positioniert, um die der Reflektor rotationssymmetrisch ausgebildet ist. Für die Ableitung der durch die Leuchtdioden produzierten Wärme ist in den zylindrischen Hohlraum des Leuchtdiodenträgers ein Stab aus wärmeleitenden Material in wärmeleitendem Kontakt eingesetzt. Dieser Stab ragt aus dem Reflektor heraus und ist außerhalb des Reflektors mit einem Kühlkörper verbunden. Dadurch ist es möglich, eine Reflektorleuchte mit Leuchtdioden so zu bestücken, dass eine hohe Abstrahlleistung erzeugt wird. In einer Anordnung mit 18 Leuchtdioden, die in drei Gruppen auf drei axialen Höhen der Mantelfläche des hohlzylindrischen Leuchtdiodenträgers jeweils in einem Winkelabstand von 60° zueinander versetzt angeordnet sind, können Leuchtdioden mit einer elektrischen Gesamtleistung von beispielsweise 70 W betrieben werden.The hollow-cylindrical light-emitting diode carrier according to the invention is preferably positioned in a center axis of the reflector about which the reflector is rotationally symmetrical. For the derivation of the heat produced by the light emitting diodes, a rod of thermally conductive material is used in heat-conducting contact in the cylindrical cavity of the LED array. This rod protrudes out of the reflector and is outside the reflector connected to a heat sink. This makes it possible to equip a reflector lamp with LEDs so that a high emission power is generated. In an arrangement with 18 light-emitting diodes, which are arranged offset in three groups on three axial heights of the lateral surface of the hollow cylindrical LED support each at an angular distance of 60 ° to each other, light emitting diodes can be operated with a total electrical power of 70 W, for example.

Die Erfindung soll im Folgenden anhand eines in der Zeichnung schematisch dargestellten Ausführungsbeispiels näher erläutert werden. Es zeigen:

  • Figur 1 eine schematische Ansicht eines Leuchtdiodenträgers mit drei Gruppen von axial hintereinander angeordneten Leuchtdioden.
  • Figur 2 den Leuchtdiodenträger gemäß Figur 1, einen Reflektor mit dem eingesetzten Leuchtdiodenträger gemäß Figur 1 und eine in den Leuchtdiodenträger eingesetzte heat pipe;
  • Figur 3 die Anordnung aus Figur 2 mit einem schematisch dargestellten Kühlkörper, der mit dem aus dem Reflektor herausragenden Ende der heat pipe verbunden ist.
The invention will be explained in more detail below with reference to an embodiment schematically illustrated in the drawing. Show it:
  • FIG. 1 a schematic view of a light-emitting diode carrier with three groups of light emitting diodes arranged axially behind one another.
  • FIG. 2 the light-emitting diode according to FIG. 1 , a reflector with the inserted LED array according to FIG. 1 and a heat pipe inserted into the LED support;
  • FIG. 3 the arrangement FIG. 2 with a heat sink shown schematically, which is connected to the protruding from the reflector end of the heat pipe.

Figur 1 zeigt einen Leuchtdiodenhalter 1, der aus einem Hohlkörper 2 mit einem kreiszylindrischen Querschnitt und einem sich konisch erweiternden Ansatzstück 3 besteht, das in einen ringförmigen Flansch 4 übergeht. Der zylindrische Hohlkörper 2 ist an seinem dem Flansch 4 gegenüberliegenden Ende durch eine Stirnwand abgeschlossen, sodass er einen einseitig axial offenen Innenraum ausbildet. Der zylindrische Hohlkörper 2 weist eine äußere Mantelfläche 5 auf, auf der sich Leuchtdioden 6 befinden. Die Leuchtdioden 6 sind in diesem Ausführungsbeispiel bezüglich der Längsachse des zylindrischen Hohlkörpers 2 in drei Gruppen hintereinander mit einem geringen Abstand angeordnet. Der Abstand ist kleiner als die Längserstreckung der Leuchtdioden 6. Jede der Gruppen von Leuchtdioden 6 weist sechs Leuchtdioden auf, die auf derselben axialen Höhe gleichmäßig auf dem kreiszylindrischen Umfang der Mantelfläche 5 verteilt sind, sodass zwischen jeweils zwei benachbarten Leuchtdioden auf der Umfangslinie ein Umfangswinkel von 60° existiert, FIG. 1 shows a light-emitting diode holder 1, which consists of a hollow body 2 with a circular cylindrical cross-section and a flared extension piece 3, which merges into an annular flange 4. The cylindrical hollow body 2 is closed at its end opposite the flange 4 by an end wall, so that it forms a one-sided axially open interior. The cylindrical hollow body 2 has an outer circumferential surface 5, on which light-emitting diodes 6 are located. The LEDs 6 are arranged in this embodiment with respect to the longitudinal axis of the cylindrical hollow body 2 in three groups one behind the other with a small distance. Each of the groups of light-emitting diodes 6 has six light-emitting diodes which are distributed uniformly at the same axial height on the circular-cylindrical circumference of the lateral surface 5, so that between each two adjacent light-emitting diodes on the circumferential line a circumferential angle of 60 ° exists,

Figur 2 verdeutlicht, dass der Leuchtdiodenhalter 1 mit seinen Leuchtdioden 6 in einen Reflektor 7 eingesetzt wird. Der Reflektor 7 ist beispielsweise ein parabolischer Reflektor 7, der rotationssymmetrisch um eine Mittenachse 8 ausgebildet ist. Der Reflektor 7 weist somit einen parabolischen Reflektorkörper 9 auf, der um die Mittenachse 8 eine Durchgangsöffnung 10 aufweist, in die der Leuchtdiodenhalter 1 eingesetzt ist und die so groß ist, dass der Flansch 4 die Einschubbewegung des Leuchtdiodenkörpers 1 in den Innenraum des Reflektors 7 begrenzt. Die Dimensionierung des Leuchtdiodenhalters 1 ist dabei so gewählt, dass die mittlere Gruppe der Leuchtdioden 6 sich auf der Höhe des Brennpunkts des parabelförmigen Reflektors 7 befindet. Die axial benachbarten Leuchtdioden 6 befinden sich daher nahe dem Brennpunkt. Die Leuchtdioden 6 strahlen ihr Licht so radial zur Mittenachse 8 des Reflektors 7 ab, sodass praktisch das gesamte abgestrahlte Licht auf die Innenseite des Reflektors 7 fällt und somit kontrolliert durch den Reflektor 7 reflektiert wird und den Reflektor 7 durch eine Ausgangsöffnung 11 als im Wesentlichen parallel ausgerichtetes Licht verlässt. Die Ausgangsöffnung 11 befindet sich dabei auf der Höhe des größten Durchmessers des Reflektors 7. FIG. 2 illustrates that the light-emitting diode holder 1 is used with its LEDs 6 in a reflector 7. The reflector 7 is for example a parabolic reflector 7 which is rotationally symmetrical about a central axis 8. The reflector 7 thus has a parabolic reflector body 9, which has a through opening 10 around the center axis 8, into which the light-emitting diode holder 1 is inserted and which is so large that the flange 4 limits the insertion movement of the light-emitting diode body 1 into the interior of the reflector 7 , The dimensioning of the light-emitting diode holder 1 is chosen so that the middle group of the LEDs 6 is located at the height of the focal point of the parabolic reflector 7. The axially adjacent LEDs 6 are therefore located near the focal point. The light-emitting diodes 6 radiate their light radially from the center axis 8 of the reflector 7, so that virtually all of the radiated light falls on the inside of the reflector 7 and thus is reflected in a controlled manner by the reflector 7 and the reflector 7 through an output opening 11 as substantially parallel Aligned light leaves. The outlet opening 11 is located at the height of the largest diameter of the reflector. 7

In den einseitig offenen Innenraum des zylindrischen Hohlkörpers ist passig, vorzugsweise im Presssitz, eine heat pipe 12 eingesetzt, die sich weit jenseits des Flansches 4 - und damit außerhalb des Reflektors 7 - erstreckt. Eine heat pipe 12 (Wärmerohr) enthält eine Vielzahl feiner Kanäle in Längsrichtung, die endseitig miteinander verbunden sind, sodass eine in die heat pipe 12 eingebrachte Kühlflüssigkeit in Längsrichtung der heat pipe 12 zirkuliert und damit Wärme von dem in den zylindrischen Hohlkörper 2 eingesetzten Ende der heat pipe 12 zum freien Ende der heat pipe 12 außerhalb des Reflektors 7 abführt.In the one-sided open interior of the cylindrical hollow body is fit, preferably in a press fit, a heat pipe 12 is used, which extends far beyond the flange 4 - and thus outside of the reflector 7. A heat pipe 12 (heat pipe) contains a plurality of fine channels in the longitudinal direction, which are interconnected end, so that a introduced into the heat pipe 12 cooling liquid in the longitudinal direction of the heat pipe 12 circulates and thus heat from the end inserted into the cylindrical hollow body 2 heat pipe 12 to the free end of the heat pipe 12 outside the reflector 7 dissipates.

Figur 3 verdeutlicht, dass auf die heat pipe 12 ein massiver Kühlkörper 13 in einem wärmeleitenden Kontakt mit der heat pipe 12 aufgebracht ist, sodass der Kühlkörper 3 die von der heat pipe 12 abtransportierte Wärme aufgrund seiner großen Wärmekapazität schnell aufnehmen und über seine große Oberfläche an die Umgebung abgeben kann. FIG. 3 illustrates that on the heat pipe 12, a solid heat sink 13 is applied in a heat-conductive contact with the heat pipe 12, so that the heat sink 3 absorb the heat transported away from the heat pipe 12 due to its large heat capacity quickly and its high surface area to the environment can deliver.

Die so ausgebildete Reflektorleuchte vereint somit die Vorteile einer herkömmlichen Reflektorleuchte, bei der das Licht kontrolliert durch die Ausgangsöffnung 11 abgestrahlt wird, mit den Vorteilen einer Lichtquelle, die mit einer Mehrzahl von Leuchtdioden 6 aufgebaut ist. Dabei wird die rotationssymmetrische Anordnung des Reflektors 7 dadurch aufgenommen, dass die Leuchtdioden 6 auf einem zylindrischen Hohlkörper 2 mit einer kreiszylindrischen Mantelfläche 5 angeordnet sind und über eine Umfangslinie der Mantelfläche 5 in gleichen Winkelabständen verteilt sind. Auf diese Weise gelingt eine gleichmäßige Ausleuchtung der Innenwandung des Reflektors 7. Diese gleichmäßige Ausleuchtung führt zu einer gleichmäßigen Abstrahlung von gerichtetem Licht durch die Ausgangsöffnung 11 des Reflektors 7. Die Verwendung des kreiszylindrischen Hohlkörpers 2 als Leuchtdiodenhalter 1 ermöglicht ferner den Einsatz eines stangenförmigen Wärmeleiters, vorzugsweise in Form einer heat pipe 12, zur effektiven Wärmeabführung in den Kühikörper 13 hinein.The reflector lamp thus formed thus combines the advantages of a conventional reflector lamp, in which the light is emitted in a controlled manner through the outlet opening 11, with the advantages of a light source which is constructed with a plurality of light-emitting diodes 6. In this case, the rotationally symmetrical arrangement of the reflector 7 is received by the light-emitting diodes 6 are arranged on a cylindrical hollow body 2 with a circular cylindrical surface 5 and are distributed over a circumferential line of the lateral surface 5 at equal angular intervals. This uniform illumination leads to a uniform emission of directed light through the exit opening 11 of the reflector 7. The use of the circular cylindrical hollow body 2 as a light-emitting diode holder 1 also allows the use of a rod-shaped heat conductor, preferably in the form of a heat pipe 12, for effective heat dissipation into the cooling body 13 inside.

Durch die Verwendung des Leuchtdiodenhalters 1, der über das Ansatzstück 3 mit dem die Einschubbewegung in den Innenraum des Reflektors 7 begrenzenden Flansch versehen ist, erzwingt die richtige Positionierung der Leuchtdioden 6 in dem Innenraum des Reflektors 7 an der gewünschten Stelle, beispielsweise nahe dem Brennpunkt eines parabelförmigen Reflektors 7.By using the light-emitting diode holder 1, which is provided via the extension piece 3 with the insertion movement into the interior of the reflector 7 limiting flange, forces the correct positioning of the light emitting diodes 6 in the interior of the reflector 7 at the desired location, for example, near the focal point of parabolic reflector 7.

Es ist ersichtlich, dass die erfindungsgemäße Reflektorleuchte außerordentlich einfach aufgebaut ist und einen sicheren Zusammenbau gewährleistet. Durch die effektive Kühlung, insbesondere über die heat pipe 12, lässt sich somit in einfacher und kostengünstiger Weise eine Reflektorleuchte mit einer sehr hohen Lichtleistung realisieren.It can be seen that the reflector lamp according to the invention is extremely simple and ensures safe assembly. Due to the effective cooling, in particular via the heat pipe 12, can thus be realized in a simple and cost-effective manner, a reflector lamp with a very high light output.

Claims (7)

Reflektorleuchte mit einem Reflektor (7) und einer in einem definierten Bereich des Reflektors (7) angeordneten Lichtquelle, deren abgestrahltes Licht überwiegend vom Reflektor (7) gerichtet reflektiert wird, dadurch gekennzeichnet, dass die Lichtquelle durch eine Mehrzahl von Leuchtdioden (6) gebildet ist, dass die Leuchtdioden (6) auf der Mantelfläche (5) eines hohlzylindrischen Leuchtdiodenträgers (1) angeordnet sind und dass in den zylindrischen Hohlraum des Leuchtdiodenträgers (1) ein Stab (12) aus wärmeleitendem Material in wärmeleitendem Kontakt eingesetzt ist, der aus dem Reflektor (7) herausragt und außerhalb des Reflektors (7) mit einem Kühlkörper (13) verbunden ist.Reflector luminaire with a reflector (7) and a light source arranged in a defined region of the reflector (7) whose emitted light is predominantly reflected by the reflector (7), characterized in that the light source is formed by a plurality of light emitting diodes (6) in that the light-emitting diodes (6) are arranged on the lateral surface (5) of a hollow-cylindrical light-emitting diode carrier (1) and in that a rod (12) of heat-conducting material in heat-conducting contact is inserted into the cylindrical cavity of the light-emitting diode carrier (1) (7) protrudes and outside of the reflector (7) is connected to a heat sink (13). Reflektorleuchte nach Anspruch 1, dadurch gekennzeichnet, dass der Stab (12) in den zylindrischen Hohlraum des Leuchtdiodenträgers (1) passig eingesetzt ist.Reflector luminaire according to claim 1, characterized in that the rod (12) is inserted snugly into the cylindrical cavity of the light-emitting diode carrier (1). Reflektorleuchte nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Stab durch eine heat pipe (12) gebildet ist.Reflector lamp according to claim 1 or 2, characterized in that the rod is formed by a heat pipe (12). Reflektorleuchte nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Reflektor (7) rotationssymmetrisch um eine Mittenachse (8) ausgebildet ist, dass der Stab (12) auf der Mittenachse (8) des Reflektors (7) positioniert ist und dass die Leuchtdioden (6) auf der Mantelfläche (5) in gleichmäßigen Umfangswinkelabständen angeordnet sind.Reflector lamp according to one of claims 1 to 3, characterized in that the reflector (7) is rotationally symmetrical about a central axis (8) is formed, that the rod (12) on the center axis (8) of the reflector (7) is positioned and that the Light-emitting diodes (6) on the lateral surface (5) are arranged at uniform circumferential angular distances. Reflektorleuchte nach Anspruch 4, dadurch gekennzeichnet, dass zumindest eine Gruppe von Leuchtdioden (6) auf gleicher axialer Höhe des Stabs (12) angeordnet ist.Reflector luminaire according to claim 4, characterized in that at least one group of light-emitting diodes (6) is arranged at the same axial height of the rod (12). Reflektorleuchte nach Anspruch 5, dadurch gekennzeichnet, dass die axiale Höhe die Höhe eines Brennpunkts des Reflektors (7) ist.Reflector luminaire according to claim 5, characterized in that the axial height is the height of a focal point of the reflector (7). Reflektorleuchte nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, dass mehrere Gruppen von Leuchtdioden (6) vorgesehen sind, die sich nahe der Höhe des Brennpunkts befinden.Reflector lamp according to one of claims 4 to 6, characterized in that a plurality of groups of light-emitting diodes (6) are provided, which are located near the height of the focal point.
EP11002446A 2010-04-06 2011-03-24 Reflector lamp Withdrawn EP2375148A3 (en)

Applications Claiming Priority (1)

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DE102010014338A DE102010014338B4 (en) 2010-04-06 2010-04-06 reflector lamp

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1783421A1 (en) 2005-10-26 2007-05-09 Spectral Gesellschaft für Lichttechnik mit beschränkter Haftung Lampe

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TWI263008B (en) * 2004-06-30 2006-10-01 Ind Tech Res Inst LED lamp
DE202005007501U1 (en) * 2005-05-12 2005-08-18 Automotive Lighting Reutlingen Gmbh Vehicle light, consists of at least one light diode chip mechanically and electrically fixed to a circuit board
CN101349412A (en) * 2007-07-18 2009-01-21 富准精密工业(深圳)有限公司 LED lamp
US20090046464A1 (en) * 2007-08-15 2009-02-19 Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. Led lamp with a heat sink
DE202009008456U1 (en) * 2009-06-19 2009-08-27 Hoffmeister Leuchten Gmbh Downlight

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1783421A1 (en) 2005-10-26 2007-05-09 Spectral Gesellschaft für Lichttechnik mit beschränkter Haftung Lampe

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