EP2539632A1 - Heat sink for a light source - Google Patents

Heat sink for a light source

Info

Publication number
EP2539632A1
EP2539632A1 EP11704788A EP11704788A EP2539632A1 EP 2539632 A1 EP2539632 A1 EP 2539632A1 EP 11704788 A EP11704788 A EP 11704788A EP 11704788 A EP11704788 A EP 11704788A EP 2539632 A1 EP2539632 A1 EP 2539632A1
Authority
EP
European Patent Office
Prior art keywords
heat sink
light source
outer body
central
central body
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
EP11704788A
Other languages
German (de)
French (fr)
Other versions
EP2539632B1 (en
Inventor
Bernd Oehle
Stefan Pieper
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.)
Zumtobel Lighting GmbH Austria
Zumtobel Lighting GmbH Germany
Original Assignee
Zumtobel Lighting GmbH Austria
Zumtobel Lighting GmbH Germany
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 Zumtobel Lighting GmbH Austria, Zumtobel Lighting GmbH Germany filed Critical Zumtobel Lighting GmbH Austria
Publication of EP2539632A1 publication Critical patent/EP2539632A1/en
Application granted granted Critical
Publication of EP2539632B1 publication Critical patent/EP2539632B1/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
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/77—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical diverging planar fins or blades, e.g. with fan-like or star-like cross-section
    • F21V29/773—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical diverging planar fins or blades, e.g. with fan-like or star-like cross-section the planes containing the fins or blades having the direction of the light emitting axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/02—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
    • F21S8/026—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling
    • 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
    • F21Y2105/00—Planar light sources
    • F21Y2105/10—Planar light sources comprising a two-dimensional array of point-like light-generating elements
    • 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]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining

Definitions

  • the present invention relates to a heat sink, for cooling a
  • Light source is provided.
  • the invention relates to a heat sink for an LED light source, wherein the heat sink with the light source may for example be part of a so-called downlight.
  • LED-based light sources are increasingly finding their way into nowadays
  • LEDs Light applications use.
  • the luminous intensities achievable with LEDs are so high in the meantime that in almost all cases previously used light sources - for example light bulbs or fluorescent lamps - can be replaced by LEDs.
  • LEDs With regard to their reliability and the possibilities for controlling, LEDs have clear advantages.
  • the use of LEDs for lighting brings that
  • a classic heat sink is usually made of metal - in particular
  • the present invention has for its object to provide a novel heat sink for cooling light sources, which has good cooling properties and at the same time can be relatively easily and inexpensively manufactured.
  • the object is achieved by a heat sink with the features of claim 1 and by a method for producing a heat sink according to claim 7.
  • the invention proposes to form the heat sink in several parts, in particular in two parts. He has for this purpose an annular outer body and a central body, which is formed by a separate element and arranged in a central opening of the outer body.
  • a heat sink is accordingly proposed for a light source, in particular for an LED light source, wherein the heat sink has an annular outer body and a central body which is formed by a separate element and arranged in a central opening of the outer body.
  • a method for producing a heat sink for a light source, in particular for an LED light source is proposed, wherein initially a ring-like outer body is provided with a central opening and then into the opening
  • the central body forms a flat support surface for the light source.
  • he may in particular also have means for fixing the light source. These may be formed for example by drilling or the like.
  • outer body and central body are preferably carried out in that the outer body is shrunk onto the central body. As a result, a full-surface contact is ensured, which allows a good transfer of heat from the central body to the outer body.
  • the subdivision of the heat sink according to the invention in particular opens up the possibility of producing the outer body in the extrusion process.
  • the central body itself is preferably designed as a solid material body in order to optimize the removal of the heat emanating from the light source.
  • FIG. 1 and 2 are views of a recessed luminaire in the form of a so-called downlight, in which the heat sink according to the invention is used;
  • FIG. 3 shows a view of the outer body of the heat sink according to the invention
  • FIG. 4a to 4c are views of a central body of the heat sink according to the invention.
  • Figs. 5 and 6 are views of the formed by the outer body and the central body
  • Fig. 7 is a view of a heat sink according to the invention with it
  • Embodiment in a so-called downlight, so a recessed luminaire, which is complained in the circular opening of a ceiling used.
  • the properties of the heat sink in a particularly advantageous manner to bear.
  • the heat sink according to the invention could also be used in other types of luminaires.
  • the heat sink 10 represents the central element of the luminaire. In particular, the heat sink 10 simultaneously also serves to hold further elements of the luminaire 1.
  • the heat sink 10 has the shape of a flat cylinder and is provided over its peripheral region with numerous fins or cooling fins 1 1, through which the surface is increased. Heat exchange with the environment is optimized by this increase in surface area.
  • the heat sink 10 also serves to support a light source, which in the present case is, in particular, an LED light source.
  • a light source which in the present case is, in particular, an LED light source.
  • several LEDs can be arranged in a matrix-like manner on a circuit board. Since the LEDs themselves represent almost punctiform light sources, an optical element 2, for example a diffusing screen, is arranged in front of the LEDs to even out the light output.
  • the heat sink 10 is formed in two parts and consists on the one hand of an annular outer body 15, which is shown in Figure 3, and a central body 20, which is shown in Figures 4a to 4c.
  • the annular outer body 15 consists essentially of a circular arrangement of fins or ribs 1 1, which extend laterally from a central opening 16 over the circumference.
  • the lamellas 11 can again branch in a Y-shape on the way to the outside, as a result of which an additional enlargement of the surface is achieved.
  • the outer body 15 shown in FIG. 3 can be produced in a simple manner as part of an extrusion process. This process is much easier and cheaper to carry out than a production in aluminum die-casting.
  • a final metal body having the cross-sectional configuration shown in the figures is made larger in length. This rod-like structure then only has to be cut to the appropriate length of the heat sink.
  • the second element which ultimately forms the heat sink 10 is the central body 20 shown in Figures 4a to 4c, which is preferably a solid material body, which is in particular integrally formed. He first has a larger disc 21, on one side of a cylinder-like
  • Projection 22 is arranged.
  • the outer contour of the projection 22 corresponds to the opening 16 of the outer body 15, so that the central body 20 can be accurately inserted into the outer body 15 as described below.
  • Attachment of the central body 20 on the outer body 15 is preferably carried out by shrinking.
  • the outer body 15 is first heated so that it expands slightly and in particular the cross-sectional area of the passage opening 16 is increased.
  • the cylindrical Vorsprang 22 of the central body 20 can be inserted into the opening 16. Subsequently, the
  • a full-surface contact with the board 31 is ensured, so that an optimal
  • Heat coupling is achieved.
  • the attachment of the board 31 to the central body 20 by means of four screws 32 which engage in corresponding holes 23 on the plate 22, the heat transfer can be further optimized by the fact that between the board 31 and support plate 21, a thermally conductive material, For example, a corresponding paste or the like is provided.
  • a strain relief device 35 can also be fastened on the circumference of the support plate 21, by means of which cables leading to the LED circuit board 31 can be fixed.
  • the present invention provides a heat sink which on the one hand can be produced simply and inexpensively, on the other hand ensures optimum heat transfer or removal of the heat generated by a light source.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Led Device Packages (AREA)

Abstract

The invention relates to an elevator system (1) comprising an elevator car (10), elevator doors (15), a drive (20), an elevator control system (30), and a counterweight (13) which can be moved in the opposite direction to the elevator car (10). The elevator control system (30) comprises a door control module (31) or can be connected to a door control module (31), which predefines a standard time for holding the doors open or an extended time for holding the doors open, depending on the load situation of the elevator car (10).

Description

Kühlkörper für eine Lichtquelle  Heat sink for a light source
Die vorliegende Erfindung betrifft einen Kühlkörper, der zur Kühlung einer The present invention relates to a heat sink, for cooling a
Lichtquelle vorgesehen ist. Insbesondere betrifft die Erfindung einen Kühlkörper für eine LED-Lichtquelle, wobei der Kühlkörper mit der Lichtquelle beispielsweise Bestandteil eines sogenannten Downlights sein kann. Light source is provided. In particular, the invention relates to a heat sink for an LED light source, wherein the heat sink with the light source may for example be part of a so-called downlight.
Lichtquellen auf LED-Basis finden in letzter Zeit zunehmend auch in LED-based light sources are increasingly finding their way into lately
Beleuchtungsanwendungen Verwendung. Die mit LEDs erreichbaren Leuchtstärken sind zwischenzeitlich so hoch, dass in nahezu allen Fällen bislang verwendete Lichtquellen - beispielsweise Glühbirnen oder Leuchtstofflampen - durch LEDs ersetzt werden können. Hinsichtlich ihrer Betriebssicherheit sowie der Möglichkeiten zur Ansteuerung weisen dabei LEDs deutliche Vorteile auf. Auf der anderen Seite bringt die Nutzung von LEDs zu Beleuchtungszwecken dasLighting applications use. The luminous intensities achievable with LEDs are so high in the meantime that in almost all cases previously used light sources - for example light bulbs or fluorescent lamps - can be replaced by LEDs. With regard to their reliability and the possibilities for controlling, LEDs have clear advantages. On the other hand, the use of LEDs for lighting brings that
Problem mit sich, dass effektive Maßnahmen zum Kühlen der Lichtquellen eingesetzt werden müssen. Die beim Betrieb von LEDs auftretende Verlustwärme ist verhältnismäßig hoch und ferner auch auf einen kleinen Bereich konzentriert, so dass zur Vermeidung von Beschädigungen Maßnahmen getroffen werden müssen, um die Wärme schnell und effektiv abzuführen. Üblicherweise werden hierzu Kühlkörper eingesetzt, welche thermisch in Verbindung mit den LEDs stehen. Problem is that effective measures for cooling the light sources must be used. The loss of heat occurring during the operation of LEDs is relatively high and also concentrated in a small area, so that measures must be taken to avoid heat dissipation quickly and effectively. Usually this heat sink are used, which are thermally in conjunction with the LEDs.
Ein klassischer Kühlkörper besteht üblicherweise aus Metall - insbesondere A classic heat sink is usually made of metal - in particular
Aluminium - und ist derart ausgebildet, dass er eine große Kontaktfläche mit der Umgebung bildet. Hierzu ist der Kühlkörper in der Regel lamellenartig ausgebildet bzw. mit entsprechenden Lamellen oder Kühlrippen versehen. Eine derartige Struktur ist allerdings verhältnismäßig komplex, weshalb bislang Kühlkörper in erster Linie als Aluminiumdruckgusskörper ausgeführt waren. Der Aufwand zur Herstellung derartiger Aluminiumdruckgusskörper ist verhältnismäßig hoch und dementsprechend mit hohen Kosten verbunden. Ferner weisen derartige Kühlkörper auch ein nicht zu vernachlässigendes Gewicht auf. Der vorliegenden Erfindung liegt die Aufgabe zugrunde, einen neuartigen Kühlkörper zum Kühlen von Lichtquellen bereitzustellen, der gute Kühleigenschaften aufweist und gleichzeitig verhältnismäßig einfach und kostengünstig hergestellt werden kann. Die Aufgabe wird durch einen Kühlkörper mit den Merkmalen des Anspruchs 1 sowie durch ein Verfahren zum Herstellen eines Kühlkörpers gemäß Anspruch 7 gelöst. Vorteilhafte Weiterbildungen der Erfindung sind Gegenstand der abhängigen Aluminum - and is designed so that it forms a large contact surface with the environment. For this purpose, the heat sink is generally formed lamellar or provided with corresponding fins or cooling fins. However, such a structure is relatively complex, which is why hitherto heat sinks were designed primarily as a cast aluminum body. The cost of producing such Aluminiumdruckgusskörper is relatively high and therefore associated with high costs. Furthermore, such heatsinks also have a not inconsiderable weight. The present invention has for its object to provide a novel heat sink for cooling light sources, which has good cooling properties and at the same time can be relatively easily and inexpensively manufactured. The object is achieved by a heat sink with the features of claim 1 and by a method for producing a heat sink according to claim 7. Advantageous developments of the invention are the subject of the dependent
Ansprüche. Bei den oben erwähnten Aluminiumdruckgusskörpern, welche bislang als Kühlkörper verwendet wurden, handelte es sich in der Regel um einstückige Elemente.  Claims. The above-mentioned aluminum die castings which have heretofore been used as heatsinks have generally been one-piece elements.
Demgegenüber wird erfindungsgemäß vorgeschlagen, den Kühlkörper mehrteilig, insbesondere zweiteilig auszubilden. Er weist hierfür einen ringartigen Außenkörper sowie einen Zentralkörper auf, der durch ein separates Element gebildet und in einer zentralen Öffnung des Außenkörpers angeordnet ist. In contrast, the invention proposes to form the heat sink in several parts, in particular in two parts. He has for this purpose an annular outer body and a central body, which is formed by a separate element and arranged in a central opening of the outer body.
Gemäß der vorliegenden Erfindung wird dementsprechend ein Kühlkörper für eine Lichtquelle, insbesondere für eine LED-Lichtquelle vorgeschlagen, wobei der Kühlkörper einen ringartigen Außenkörper sowie einen Zentralkörper aufweist, der durch ein separates Element gebildet und in einer zentralen Öffnung des Außenkörpers angeordnet ist. Gemäß der vorliegenden Erfindung wird auch ein Verfahren zum Erstellen eines Kühlkörpers für eine Lichtquelle, insbesondere für eine LED- Lichtquelle vorgeschlagen, wobei zunächst ein ringartiger Außenkörper mit einer zentralen Öffnung bereitgestellt wird und anschließend in die Öffnung ein According to the present invention, a heat sink is accordingly proposed for a light source, in particular for an LED light source, wherein the heat sink has an annular outer body and a central body which is formed by a separate element and arranged in a central opening of the outer body. According to the present invention, a method for producing a heat sink for a light source, in particular for an LED light source is proposed, wherein initially a ring-like outer body is provided with a central opening and then into the opening
Zentralkörper eingesetzt wird. Central body is used.
Vorzugsweise bildet der Zentralkörper eine ebene Auflagefläche für die Lichtquelle. Er kann hierzu insbesondere auch Mittel zur Befestigung der Lichtquelle aufweisen. Diese können beispielsweise durch Bohrungen oder dergleichen gebildet sein. Preferably, the central body forms a flat support surface for the light source. For this purpose, he may in particular also have means for fixing the light source. These may be formed for example by drilling or the like.
Das Zusammenfügen von Außenkörper und Zentralkörper erfolgt vorzugsweise dadurch, dass der Außenkörper auf den Zentralkörper aufgeschrumpft wird. Hierdurch ist ein vollflächiger Kontakt gewährleistet, der eine gute Übertragung der Wärme von dem Zentralkörper auf den Außenkörper ermöglicht. The joining of outer body and central body is preferably carried out in that the outer body is shrunk onto the central body. As a result, a full-surface contact is ensured, which allows a good transfer of heat from the central body to the outer body.
Die erfindungsgemäße Unterteilung des Kühlkörpers eröffnet insbesondere die Möglichkeit, den Außenkörper im Strangpressverfahren herzustellen. Diese The subdivision of the heat sink according to the invention in particular opens up the possibility of producing the outer body in the extrusion process. These
Vorgehensweise ist deutlich einfacher und kostengünstiger als das The procedure is much simpler and cheaper than that
Druckgussverfahren, weshalb die Herstellungskosten für den Kühlkörper deutlich reduziert werden können. Auch eine Gewichtsreduzierung des Kühlkörpers wird bei gleichbleibend guten Kühleigenschaften erzielt. Der Zentralkörper selbst ist vorzugsweise als Vollmaterialkörper ausgebildet, um die Abführung der von der Lichtquelle ausgehenden Wärme zu optimieren. Die casting process, which is why the manufacturing cost of the heat sink significantly can be reduced. Also, a weight reduction of the heat sink is achieved with consistently good cooling properties. The central body itself is preferably designed as a solid material body in order to optimize the removal of the heat emanating from the light source.
Nachfolgend soll die Erfindung anhand der beiliegenden Zeichnung näher erläutert werden. Es zeigen: The invention will be explained in more detail with reference to the accompanying drawings. Show it:
Fig. 1 und 2 Ansichten einer Einbauleuchte in Form eines sogenannten Downlights, bei welcher der erfindungsgemäße Kühlkörper zum Einsatz kommt; 1 and 2 are views of a recessed luminaire in the form of a so-called downlight, in which the heat sink according to the invention is used;
Fig. 3 eine Ansicht des Außenkörpers des erfindungsgemäßen Kühlkörpers; 3 shows a view of the outer body of the heat sink according to the invention;
Fig. 4a bis 4c Ansichten eines Zentralkörpers des erfindungsgemäßen Kühlkörpers; 4a to 4c are views of a central body of the heat sink according to the invention;
Fig. 5 und 6 Ansichten des durch Außenkörper und Zentralkörper gebildeten Figs. 5 and 6 are views of the formed by the outer body and the central body
Kühlkörpers und  Heatsink and
Fig. 7 eine Ansicht eines erfindungsgemäßen Kühlkörpers mit daran Fig. 7 is a view of a heat sink according to the invention with it
befestigter LED-Lichtquelle.  mounted LED light source.
Der erfindungsgemäße Kühlkörper wird bei dem nachfolgend beschriebenen The heat sink according to the invention is described in the following
Ausführungsbeispiel bei einem sogenannten Downlight, also einer Einbauleuchte, die in der kreisförmigen Öffnung einer Decke moniert wird, verwendet. Bei einem derartigen Anwendungsfall kommen die Eigenschaften des Kühlkörpers in besonders vorteilhafter Weise zum Tragen. Gleichwohl ist darauf hinzuweisen, dass der erfindungsgemäße Kühlkörper auch bei anderen Leuchtentypen eingesetzt werden könnte. Embodiment in a so-called downlight, so a recessed luminaire, which is complained in the circular opening of a ceiling used. In such an application, the properties of the heat sink in a particularly advantageous manner to bear. However, it should be noted that the heat sink according to the invention could also be used in other types of luminaires.
Bei dem in den Figuren 1 und 2 dargestellten Downlight 1 stellt der Kühlkörper 10 das zentrale Element der Leuchte dar. Insbesondere dient der Kühlkörper 10 gleichzeitig auch der Halterung weiterer Elemente der Leuchte 1. In the case of the downlight 1 shown in FIGS. 1 and 2, the heat sink 10 represents the central element of the luminaire. In particular, the heat sink 10 simultaneously also serves to hold further elements of the luminaire 1.
Der Kühlkörper 10 weist die Form eines flachen Zylinders auf und ist über seinen Umfangsbereich hinweg mit zahlreichen Lamellen bzw. Kühlrippen 1 1 versehen, durch welche die Oberfläche vergrößert wird. Ein Wärmeaustausch mit der Umgebung wird durch diese Oberflächenvergrößerung optimiert. Der Kühlkörper 10 dient ferner der Lagerung einer Lichtquelle, bei der es sich im vorliegenden Fall insbesondere um eine LED-Lichtquelle handelt. Insbesondere können hierfür - wie nachfolgend näher beschrieben - mehrere LEDs matrixartig auf einer Platine angeordnet sein. Da die LEDs selbst nahezu punktförmige Lichtquellen darstellen, ist zur Vergleichmäßigung der Lichtabgabe vor den LEDs ein optisches Element 2, beispielsweise eine Streuscheibe angeordnet. Hierdurch werden die einzelnen durch die LEDs hervorgerufenen sog. Hotspots aufgelöst und es ergibt sich das Erscheinungsbild einer hell und gleichmäßig leuchtenden Fläche. Die Lichtabgabe zur Unterseite erfolgt dann über einen topfförmigen Reflektor 3, der mit seiner Oberseite mit dem Kühlkörper 10 gekoppelt ist und mit seiner Unterseite eine kreisförmige Lichtaustrittsöffhung definiert. Die Befestigung der Baueinheit bestehend aus Kühlkörper 10 und Reflektor 3 in einer Decke erfolgt mit Hilfe eines Montagerings 4, der zunächst in die Deckenöffnung eingesetzt und dort mittels dreier The heat sink 10 has the shape of a flat cylinder and is provided over its peripheral region with numerous fins or cooling fins 1 1, through which the surface is increased. Heat exchange with the environment is optimized by this increase in surface area. The heat sink 10 also serves to support a light source, which in the present case is, in particular, an LED light source. In particular, for this purpose - as described in more detail below - several LEDs can be arranged in a matrix-like manner on a circuit board. Since the LEDs themselves represent almost punctiform light sources, an optical element 2, for example a diffusing screen, is arranged in front of the LEDs to even out the light output. As a result, the individual caused by the LEDs so-called hotspots are resolved and it results in the appearance of a bright and evenly luminous surface. The light output to the bottom then takes place via a cup-shaped reflector 3, which is coupled with its upper side to the heat sink 10 and defines with its underside a circular Lichtaustrittsöffhung. The attachment of the assembly consisting of heat sink 10 and reflector 3 in a ceiling using a mounting ring 4, which is first inserted into the ceiling opening and there by means of three
ausschwenkbarer Rastarme 5 fixiert wird. Anschließend wird die Leuchte 1 von der Unterseite her in diesen Montagering 4 eingesetzt und beispielsweise durch Verdrehen fixiert. Derartige Montagesysteme für Downlights sind bereits hinlänglich bekannt und sollen dementsprechend nachfolgend nicht näher erläutert werden. swing-out locking arms 5 is fixed. Subsequently, the lamp 1 is inserted from the bottom in this mounting ring 4 and fixed, for example by turning. Such mounting systems for downlights are already well known and will accordingly not be explained in detail below.
Die Besonderheit des Kühlkörpers 10 besteht in dessen Ausgestaltung und soll nachfolgend beschrieben werden. Erfindungsgemäß ist der Kühlkörper 10 zweiteilig ausgebildet und besteht zum einen aus einem ringförmigen Außenkörper 15, der in Figur 3 gezeigt ist, sowie einem Zentralkörper 20, der in den Figuren 4a bis 4c gezeigt ist. Der ringförmige Außenkörper 15 besteht im Wesentlichen aus einer kreisförmigen Anordnung von Lamellen bzw. Rippen 1 1 , die sich von einer zentralen Öffnung 16 über den Umfang hinweg seitlich erstrecken. Die Lamellen 11 können sich - wie in Figur 3 gezeigt - auf dem Weg zur Außenseite hin nochmals Y-förmig verzweigen, wodurch eine zusätzliche Vergrößerung der Oberfläche erzielt wird. An ihrem The peculiarity of the heat sink 10 is in its configuration and will be described below. According to the invention, the heat sink 10 is formed in two parts and consists on the one hand of an annular outer body 15, which is shown in Figure 3, and a central body 20, which is shown in Figures 4a to 4c. The annular outer body 15 consists essentially of a circular arrangement of fins or ribs 1 1, which extend laterally from a central opening 16 over the circumference. As shown in FIG. 3, the lamellas 11 can again branch in a Y-shape on the way to the outside, as a result of which an additional enlargement of the surface is achieved. At her
Innenumfang schließen die Lamellen 11 die bereits erwähnte Öffnung 16 ein, welche kreisförmig ausgebildet ist. Inner circumference close the slats 11, the aforementioned opening 16, which is circular.
Der in Figur 3 dargestellte Außenkörper 15 lässt sich in einfacher Weise im Rahmen eines Strangpressverfahrens herstellen. Dieses Verfahren ist deutlich einfacher und kostengünstiger durchzuführen als eine Herstellung im Aluminiumdruckgussverfahren. Beim Strangpressverfahren wird letztendliche ein Metallkörper, der die in den Figuren gezeigte Querschnittskonfiguration aufweist, mit einer größeren Länge erstellt. Dieses stangenartige Gebilde muss dann nur noch lediglich auf die entsprechende Länge des Kühlkörpers abgeschnitten werden. Desweiteren wird dann mittels abhebender Verfahren, beispielsweise Fräsen oder dergleichen der Außenkörper mit einer Vertiefung 17 versehen, welche der Anordnung der Lichtquelle sowie eines nicht näher dargestellten Reflektors dient. Das zweite Element welches letztendlich den Kühlkörper 10 bildet, ist der in den Figuren 4a bis 4c dargestellte Zentralkörper 20, bei dem es sich vorzugsweise um einen Vollmaterialkörper handelt, der insbesondere einstückig ausgebildet ist. Er weist zunächst eine größere Scheibe 21 auf, an deren einer Seite ein zylinderartiger The outer body 15 shown in FIG. 3 can be produced in a simple manner as part of an extrusion process. This process is much easier and cheaper to carry out than a production in aluminum die-casting. In the extrusion molding process, a final metal body having the cross-sectional configuration shown in the figures is made larger in length. This rod-like structure then only has to be cut to the appropriate length of the heat sink. Furthermore, then by means of contrasting Method, such as milling or the like of the outer body provided with a recess 17 which serves the arrangement of the light source and a reflector, not shown. The second element which ultimately forms the heat sink 10, is the central body 20 shown in Figures 4a to 4c, which is preferably a solid material body, which is in particular integrally formed. He first has a larger disc 21, on one side of a cylinder-like
Vorsprung 22 angeordnet ist. Die Außenkontur des Vorsprungs 22 entspricht dabei der Öffnung 16 des Außenkörpers 15, so dass der Zentralkörper 20 wie nachfolgend beschrieben passgenau in den Außenkörper 15 eingesetzt werden kann. Die Projection 22 is arranged. The outer contour of the projection 22 corresponds to the opening 16 of the outer body 15, so that the central body 20 can be accurately inserted into the outer body 15 as described below. The
Befestigung des Zentralkörpers 20 an dem Außenkörper 15 erfolgt dabei vorzugsweise durch Aufschrumpfen. Hierzu wird zunächst der Außenkörper 15 erwärmt, so dass er sich leicht ausdehnt und insbesondere die Querschnittsfläche der Durchgangsöffnung 16 vergrößert ist. In diesem Zustand kann der zylinderförmige Vorsprang 22 des Zentralkörpers 20 in die Öffnung 16 eingesetzt werden. Anschließend wird der Attachment of the central body 20 on the outer body 15 is preferably carried out by shrinking. For this purpose, the outer body 15 is first heated so that it expands slightly and in particular the cross-sectional area of the passage opening 16 is increased. In this state, the cylindrical Vorsprang 22 of the central body 20 can be inserted into the opening 16. Subsequently, the
Außenkörper 15 abgekühlt und schrumpft hierbei auf den Vorsprung 22 des Outer body 15 cooled and shrinks in this case on the projection 22 of the
Zentralkörpers 20 auf. Diese Vorgehensweise erlaubt es, beide Elemente ohne die Nutzung zusätzlicher Hilfsmittel miteinander zu verbinden. Gleichzeitig ist ein vollflächiger Kontakt beider Elementen sichergestellt, wodurch eine optimale Central body 20 on. This approach allows you to connect both elements without the use of additional tools. At the same time a full contact of both elements is ensured, whereby an optimal
Wärmeübertragung gewährleistet ist. Heat transfer is guaranteed.
Anstelle der dargestellten Kreisform für die Durchgangsöffnung 16 sowie den Vorsprung 22 könnten selbstverständlich auch andere Querschnittsformen gewählt werden. Die dargestellte Konfiguration bringt allerdings im Hinblick auf die Instead of the illustrated circular shape for the passage opening 16 and the projection 22, of course, other cross-sectional shapes could be selected. The configuration shown, however, brings in terms of
Herstellung der Elemente Vorteile mit sich. Making the elements benefits with it.
Nach Einsetzen des Zentralkörpers 20 in den Außenkörper 15 ergibt sich dann die in den Figuren 5 und 6 dargestellte Anordnung, wobei insbesondere Figur 6 entnehmbar ist, dass die Platte 21 des Zentralkörpers 20 nunmehr eine ebene Bodenfläche der Ausnehmung 17 bildet. Diese kann zum Anordnen einer Lichtquelle 30 genutzt werden, wie Figur 7 zeigt. Die Lichtquelle 30 wird im dargestellten After inserting the central body 20 in the outer body 15, the arrangement shown in Figures 5 and 6 then results, in particular Figure 6 is removed, that the plate 21 of the central body 20 now forms a flat bottom surface of the recess 17. This can be used to arrange a light source 30, as Figure 7 shows. The light source 30 is shown in the
Ausführungsbeispiel durch eine Mehrzahl von LEDs 32 gebildet, die gemeinsam auf einer Platine 31 angeordnet sind. Durch die Platte 21 des Zentralkörpers 20 ist ein vollflächiger Kontakt mit der Platine 31 gewährleistet, so dass eine optimale Embodiment formed by a plurality of LEDs 32, which are arranged together on a board 31. Through the plate 21 of the central body 20 a full-surface contact with the board 31 is ensured, so that an optimal
Wärmekopplung erzielt wird. Die Befestigung der Platine 31 an dem Zentralkörper 20 erfolgt mit Hilfe von vier Schrauben 32, welche in entsprechende Bohrungen 23 an der Platte 22 eingreifen Dabei kann die Wärmeübertragung zusätzlich dadurch optimiert werden, dass zwischen Platine 31 und Auflageplatte 21 ein wärmeleitfähiges Material, beispielsweise eine entsprechende Paste oder dergleichen vorgesehen wird. In jedem Fall ist der dargestellten Ausfuhrungsform eine effektive Wärmekopplung zwischen den Lichtquellen und dem Kühlkörper 10 vorhanden. Wie ferner in Figur 7 angedeutet ist, kann am Umfang der Auflageplatte 21 ferner eine Zugentlastungsvorrichtung 35 befestigt werden, Uber welche zu der LED-Platine 31 führende Kabel fixiert werden können. Heat coupling is achieved. The attachment of the board 31 to the central body 20 by means of four screws 32 which engage in corresponding holes 23 on the plate 22, the heat transfer can be further optimized by the fact that between the board 31 and support plate 21, a thermally conductive material, For example, a corresponding paste or the like is provided. In any case, the illustrated embodiment, an effective thermal coupling between the light sources and the heat sink 10 is present. As further indicated in FIG. 7, a strain relief device 35 can also be fastened on the circumference of the support plate 21, by means of which cables leading to the LED circuit board 31 can be fixed.
Letztendlich wird durch die vorliegende Erfindung ein Kühlkörper geschaffen, der einerseits einfach und kostengünstig hergestellt werden kann, andererseits eine optimale Wärmeübertragung bzw. Abführung der von einer Lichtquelle generierten Wärme gewährleistet. Finally, the present invention provides a heat sink which on the one hand can be produced simply and inexpensively, on the other hand ensures optimum heat transfer or removal of the heat generated by a light source.

Claims

Ansprüche claims
1. Kühlkörper (10) für eine Lichtquelle (30), insbesondere für eine LED-Lichtquelle, wobei der Kühlkörper (10) einen ringartigen Außenkörper (15) sowie einen 1. Heatsink (10) for a light source (30), in particular for an LED light source, wherein the heat sink (10) has a ring-like outer body (15) and a
Zentralkörper (20) aufweist, der durch ein separates Element gebildet und in einer zentralen Öffnung (16) des Außenkörpers (15) angeordnet ist. Central body (20) which is formed by a separate element and in a central opening (16) of the outer body (15) is arranged.
2. Kühlkörper nach Ansprach 1, 2. Heatsink according to spoke 1,
dadurch gekennzeichnet, characterized,
dass der Zentralkörper (20) eine vorzugsweise ebene Auflagefläche für die Lichtquelle (30) bildet. in that the central body (20) forms a preferably flat bearing surface for the light source (30).
3. Kühlkörper nach Anspruch 1 oder 2, 3. Heatsink according to claim 1 or 2,
dadurch gekennzeichnet, characterized,
dass der Zentralkörper (20) Mittel zur Befestigung der Lichtquelle, insbesondere Bohrungen (23) aufweist. in that the central body (20) has means for fastening the light source, in particular bores (23).
4. Kühlkörper nach einem der vorherigen Ansprüche, 4. Heatsink according to one of the preceding claims,
dadurch gekennzeichnet, characterized,
dass der Außenkörper (15) auf den Zentralkörper (20) aufgeschrumpft ist. that the outer body (15) is shrunk onto the central body (20).
5. Kühlkörper nach einem der vorherigen Ansprüche, 5. Heatsink according to one of the preceding claims,
dadurch gekennzeichnet, characterized,
dass der Außenkörper (15) durch ein Strangpreßprofil gebildet ist und eine Vielzahl von zur Außenseite gerichteten Kühlrippen (1 1) aufweist. in that the outer body (15) is formed by an extruded profile and has a multiplicity of cooling ribs (11) directed towards the outside.
6. Kühlkörper nach einem der vorherigen Ansprüche, 6. Heatsink according to one of the preceding claims,
dadurch gekennzeichnet, characterized,
dass der Zentralkörper (20) als Vollmaterialkörper ausgebildet ist. the central body (20) is designed as a solid material body.
7. Verfahren zum Erstellen eines Kühlkörpers ( 10) für eine Lichtquelle (30), insbesondere für eine LED-Lichtquelle, 7. Method for producing a heat sink (10) for a light source (30), in particular for an LED light source,
wobei zunächst ein ringartiger Außenkörper ( 15) mit einer zentralen Öffnung (16) bereitgestellt wird und in die Öffnung ( 16) ein Zentralkörper (20) eingesetzt wird. wherein initially a ring-like outer body (15) is provided with a central opening (16) and in the opening (16) a central body (20) is inserted.
8. Verfahren nach Anspruch 7, 8. The method according to claim 7,
dadurch gekennzeichnet, characterized,
dass der Außenkörper (15) auf den Zentralkörper (20) aufgeschrumpft wird. that the outer body (15) is shrunk onto the central body (20).
9. Verfahren nach Anspruch 7 oder 8, 9. The method according to claim 7 or 8,
dadurch gekennzeichnet, characterized,
dass der Außenkörper (15) im Strangpressverfahren hergestellt wird. that the outer body (15) is produced by the extrusion process.
EP11704788.6A 2010-02-23 2011-02-23 Heat sink for a light source Active EP2539632B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010002235A DE102010002235A1 (en) 2010-02-23 2010-02-23 Heat sink for a light source
PCT/EP2011/052647 WO2011104254A1 (en) 2010-02-23 2011-02-23 Heat sink for a light source

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EP2539632A1 true EP2539632A1 (en) 2013-01-02
EP2539632B1 EP2539632B1 (en) 2016-01-06

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EP (1) EP2539632B1 (en)
CN (1) CN102884376A (en)
DE (1) DE102010002235A1 (en)
WO (1) WO2011104254A1 (en)

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EP3336423B1 (en) 2016-12-14 2019-11-06 Gifas Beteiligungen GmbH Lighting device, a method for producing a base body and/or cooling element of the illumination device and their use

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Publication number Publication date
US20130120998A1 (en) 2013-05-16
EP2539632B1 (en) 2016-01-06
DE102010002235A1 (en) 2011-08-25
WO2011104254A8 (en) 2012-09-20
WO2011104254A1 (en) 2011-09-01
CN102884376A (en) 2013-01-16

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