EP2587117A1 - Heat sink for recessed light - Google Patents

Abstract

The heat sink (1) has cooling arms (10,20,30,40) that are provided with primary legs (11,21,31,41) which are arranged parallelly with respect to secondary legs (12,22,32,42). The cooling arms are arranged such that tertiary legs (13,23,33,43) are in contact with opposite ends of secondary legs to form a mounting surface (2) for lamp (3). The tertiary legs are extended in same direction from the mounting surface. A connecting element is provided for releasably connecting and fixing the cooling arms and secondary legs. Independent claims are included for the following: (1) method for installing heat sink; and (2) method for mounting LED recessed luminaire.

Description

The present invention relates to a heat sink for a recessed luminaire, in particular an LED recessed luminaire.

Recessed luminaires are known from the prior art and are mounted in an intermediate construction. The intermediate structure is usually one (s) from a ceiling / wall / a floor spaced provided (r) (and preferably arranged parallel thereto (r)) intermediate ceiling / intermediate wall / intermediate floor. For the sake of simplicity, the following will be limited to false ceilings, with partitions or intermediate floors or comparable structures always being included in the scope of the invention.

Typically, such false ceilings, also known as "false ceilings", are economical (e.g., to reduce the cubic meter of space and, consequently, heating costs) or aesthetics (to conceal conduits, cables, harnesses or lights ) intended. The false ceilings are usually removable only with considerable effort or even by destruction of the false ceiling.

FIG. 12 shows by way of example a sub-floor construction 100 according to the prior art. In this case, a false ceiling 120 is provided with respect to a ceiling 110 at a distance y and usually also parallel to the (raw) ceiling 110, so that between the ceiling 110 and false ceiling 120 an intermediate (hollow) space 130 is formed. In the false ceiling 120, an opening 140 is provided with a size x (eg circle with diameter x or square with edge length x or the like), in or with respect to a recessed luminaire can be arranged, the lamp body, viewed from the opening 140 extends substantially into the gap. The recessed light is provided for aesthetic reasons substantially flush with the outer side 121 of the false ceiling 120, ie to the side facing away from the ceiling 110 side.

With such recessed luminaires, the problem regularly arises that the available intermediate space 130 between the suspended ceiling 120 and the raw ceiling 110 is relatively small. This has the consequence that the heatsink used the recessed light on the one hand can not be sized too large, so that they can be mounted despite the limited mounting space, which is limited in particular by the height y. On the other hand, there is basically the problem that the mounting hole 140 in the false ceiling 120 has only a certain size x. This, too, limits the volume or size of the usable heat sink, since it must be inserted through the opening 140 for mounting. The recessed light must therefore be such that it can be mounted through the opening 140 in the false ceiling 120, wherein the mounting space is limited by the opening cross-section and the height y of the intermediate space 130 above the false ceiling 120. Thus, the known heat sink comparatively small dimensions.

Due to the ever-increasing use of LEDs as light sources, however, there is a need to use heatsinks which effectively dissipate the heat generated during operation, preferably to the air in the space 130, as well as to uniformly distribute the heat in the space 130.

It is therefore an object of the invention to provide a heat sink for a recessed luminaire and a recessed luminaire and a method for installing a recessed luminaire, which allow sufficient cooling of the thermally critical luminaire components when mounted in the false ceiling and a simple installation of the heat sink or the recessed luminaire.

Under lighting components within the scope of the invention, both the light source (eg LED module, etc.) itself as well as (optically) cooperating elements, such as reflectors or (stray) lenses and the like or electronic devices, etc., as well understood the unity of the aforementioned elements.

This object is solved by the subject matter of the independent claims. The dependent claims further form the central idea of the invention in a particularly advantageous manner.

• einen ersten Schenkel, und
• einen vom ersten Schenkel beabstandeten und vorzugsweise im Wesentlichen parallel zum ersten Schenkel angeordneten zweiten Schenkel,
• wobei der erste Schenkel und der zweite Schenkel durch wenigstens einen dritten Schenkel miteinander verbunden sind und sich jeweils von dem dritten Schenkel in entgegengesetzte Richtungen und voneinander weg erstrecken,

wobei die wenigstens zwei Kühlarme derart zueinander angeordnet sind, dass die vom dritten Schenkel abgewandten Enden der jeweiligen zweiten Schenkel stirnseitig aneinanderstoßen und somit eine Montagefläche für (thermisch kritische Bauteile von) Leuchtenkomponenten bilden, und wobei sich die dritten Schenkel alle in derselben Richtung von der Montagefläche weg erstrecken, und
ein Verbindungselement zum vorzugsweise lösbaren Verbinden und Fixieren der Kühlarme, vorzugsweise der aneinanderstoßenden Schenkel.According to a first aspect, the invention relates to a heat sink for recessed luminaires, in particular LED recessed luminaires, comprising: at least two separately provided cooling arms, a cooling arm each having:

• a first leg, and
• a second leg spaced from the first leg and preferably arranged substantially parallel to the first leg,
• wherein the first leg and the second leg are interconnected by at least one third leg and each extend from the third leg in opposite directions and away from each other,

wherein the at least two cooling arms are arranged to each other such that the ends facing away from the third leg the respective second leg abut each other frontally and thus form a mounting surface for (thermal critical components of) lamp components, and wherein the third legs all extend in the same direction away from the mounting surface, and
a connecting element for preferably releasably connecting and fixing the cooling arms, preferably the abutting leg.

By the heat sink consists of several individual elements, which can first be introduced and positioned individually in a space between a false ceiling and a false ceiling and the heat sink in the disassembled state simply inserted into the opening and the corresponding cooling arms positioned to each other and only then by means of the connecting element get connected. The preferably substantially Z-shaped design of the cooling arms, in particular the legs parallel to each other and spaced from each other, allow easy insertion of the cooling arms through the small opening in a low clearance compared to straight or flat formed cooling arms. Thus, the cooling arm can be introduced with a first leg obliquely into the gap. The second and third legs can be easily inserted through the opening after insertion of the first leg by longitudinal movement of the third leg. By simple rotation of the cooling arm by 180 ° about its longitudinal axis, the joined second leg in a simple manner provided by the opening at a predetermined distance mounting surface for the lamp components (eg. LED module). Furthermore, the first leg can be made particularly long, in order thus to have a projected area for increased heat transmission by radiation, that is to say the heat-transmitting surface of the heat sink, to enlarge. In addition, by providing at least two such cooling arms, the first legs of which extend away from each other, a shape of the heat sink is provided which allows for a good distribution of heat over a widely distributed area in the gap. By choosing the number, geometry and dimensions of the cooling arms, the cooling capacity of the heat sink can be adapted to the appropriate conditions in a particularly simple manner. Thus, in spite of the large heat transferring surface, the heat sink according to the invention can also be inserted through a small opening in the false ceiling and also at a small height of the gap by inserting the cooling arms one at a time into the space and only after respective rotation in the space and positioning the individual cooling arms these are connected to a heat sink together. The dismantling of the heat sink in the cooling arms, which is disclosed by the (preferably detachable) subsequent connection of the cooling arms by means of connecting elements, thus makes it possible to provide a large surface for heat dissipation, wherein the overall dimensions of the heat sink compared to the mounting hole can be many times greater.

The heat output is further increased by the design and arrangement of the legs, in particular in Z-shape. Thus, the large-sized first leg realized a large area for heat dissipation, as this allows in conjunction with the orthogonal to the first leg provided third leg a good convective heat dissipation, as in FIG. 11 is shown schematically.

Preferably, the cooling arms of a heat sink are identical. In this way, the same number of parts of the cooling arms is increased, which simplifies the manufacture of the heat sink and helps to avoid assembly errors.

Preferably, the first leg has a length which corresponds to a multiple of the length of the second leg and a multiple of the diameter or the edge length of a mounting opening in a false ceiling. In this way, the particularly large first leg forms the main surface of the cooling arm, while the assembly of the heat sink is particularly easy to carry out.

Preferably, the first leg is formed telescopically, so that its length is selectively adjustable. In this way, the heat-transferring surface of the heat sink can optionally be adapted to the conditions and, for example, be extended many times after the introduction of the respective cooling arms, without affecting the mounting of the heat sink.

Preferably, the ends abutting ends are formed so that they flush with each other to form a closed surface as a mounting surface. In this, the heat dissipation is improved, since the heat sink, although composed of several individual components (cooling arms and connecting element), yet formed according to a one-piece body.

Preferably, the frontally abutting ends at x cooling arms form an angle of 180 ° / x with the longitudinal axis of the respective cooling arm. In this way, the cooling arms are seen over the circumference of the heat sink after their positioning evenly distributed to each other, which has a uniform heat distribution in the space result. Especially with three or more cooling arms can a star-shaped heat sink can be provided, which allows a uniform heat dissipation. In addition, then the abutting ends of the second leg are positioned flush with each other, which in turn has an improved heat dissipation result.

Preferably, a space is limited by the abutting legs and the third legs, in which luminaire components such as light bulbs, in particular LED modules, and preferably reflectors and / or lenses are preferably attachable to the mounting surface. By simply inserting and aligning the cooling arms, in particular the Z-shaped cooling arms, a sufficiently large mounting and installation space for attaching the lighting components is automatically provided. The heat sink thus simultaneously serves as a mechanical support frame for the luminaire components.

Preferably holding devices for receiving luminaire components such as light sources, in particular LED modules, or reflectors or lenses are provided on the connecting element or on at least one of the adjoining legs. The holding devices can be designed in any known form, for example as a bayonet connection, screw connection, latching connection or the like, which can be connected to corresponding holding elements of the luminaire components. This allows a standardized design of the heat sink components and consequently a simple attachment of the lighting components.

Preferably, the connecting element is formed by a part of a luminaire component (eg LED module, circuit board, transformer, reflector, etc.) and / or has a ring or a plate. Especially in the case where the connecting element is formed by a part of the lamp component, by simply providing the same, the entire cooling structure can be securely fixed. If the connecting element is formed by an additional component, such as a carrier ring or a carrier plate, then the heat sink can be fixed independently of the lamp element after the positioning of the cooling arms. This allows in particular a simple replacement of a lamp or other lighting components, such as. Reflectors or lenses, even after mounting the heat sink and fixing the cooling arms, without loosening the connection between the cooling arms.

If the connecting element is formed as a ring, then this is preferably designed such that (thermally critical components of) lighting components (eg, a light source, such as an LED module) within the ring on the mounting surface of the abutting leg can be attached so that they all cooling arms are in communication, preferably on the mounting surface (ie on all the second legs of the cooling arms) lie flat. Since the thermally critical components of the luminaire components (for example the LED module) are applied directly to corresponding regions of the cooling arms, this direct coupling allows a sufficient and uniform heat transfer and heat dissipation to take place across all the cooling arms. In addition, the direct contact of the thermally critical components of the lamp component with the cooling arms prevents additional thermal resistances to the component connections.

If the connecting element is designed as a plate, then it is attached in such a way that it extends at least over the extending abutting leg of all cooling arms and preferably in surface contact with the mounting surface (ie all the second legs of the cooling arms) is. This also allows a sufficient and uniform heat dissipation over all cooling arms. The plate is preferably designed as a heat spreader; So in particular made of a good heat conducting material. In the case of uneven component connections, the unevenness is compensated by the plate, so that a flat mounting surface is provided. By the plate as a heat spreader is thus minimized between the heat sink and heat source, the thermal resistance of the component connections.

According to a second aspect, the invention relates to a recessed light having a heat sink according to the invention and a light source, in particular an LED module, which is preferably arranged over the connecting element or directly on the mounting surface of the abutting legs of all the cooling arms preferably flat. In this way, the heat dissipation from the lamp to the heat sink can be effectively and evenly distributed. The luminaire components, such as, for example, the luminous means and preferably also reflectors and / or lenses, can be attached to holding devices of the connecting elements or at least one of the adjoining legs by means of corresponding holding elements of the luminaire component, which allows a simple assembly and disassembly of the luminaire components.

• Einführen eines ersten Kühlarmes in einen Zwischenraum zwischen einer Rohdecke und einer Zwischendecke gemäß den folgenden Schritten: a) Einführen des ersten Schenkels in eine Öffnung in der Zwischendecke in Längsrichtung des Kühlarms und vorzugsweise schräg zur Zwischendecke, wobei der Kühlarm derart angeordnet ist, dass sich der dritte Schenkel bzgl. des ersten Schenkels im Wesentlichen von der Decke weg erstreckt, b) Einführen des dritten Schenkels und des zweiten Schenkels durch die Öffnung in den Zwischenraum im Wesentlichen in Längsrichtung des dritten Schenkels, und c) Drehen des Kühlarmes im Zwischenraum um 180° um seine Längsachse, so dass der erste Schenkel der Zwischendecke zugewandt ist und auf dieser vorzugsweise aufliegt und der zweite Schenkel zwischen der Decke und der Zwischendecke und in Verlängerung der Öffnung angeordnet ist,
• Einführen wenigstens eines zweiten Kühlarmes gemäß den Schritten a) bis c),
• Anordnen der Kühlarme derart, dass die vom dritten Schenkel abgewandten Enden der jeweiligen zweiten Schenkel stirnseitig aneinanderstoßen und somit eine Montagefläche für (thermisch kritische Bauteile von) Leuchtenkomponenten bilden, und
• Anbringen von Verbindungselementen zum Verbinden der Kühlarme untereinander und Fixieren derselben zueinander, vorzugsweise lösbar und ferner vorzugsweise derart, dass das Verbindungselement mit den aneinanderstoßenden Schenkeln aller Kühlarme verbunden, vorzugsweise flächig verbunden ist.

According to a third aspect, the invention relates to a method for installing a heat sink according to the invention, comprising the following steps:

• Introducing a first cooling arm in a space between a raw ceiling and a false ceiling according to the following steps: a) inserting the first leg into an opening in the false ceiling in the longitudinal direction of the cooling arm, and preferably obliquely to the false ceiling, wherein the cooling arm is arranged such that the third leg with respect to the first leg extends substantially from the ceiling , b) inserting the third leg and the second leg through the opening in the gap substantially in the longitudinal direction of the third leg, and c) rotating the cooling arm in the space by 180 ° about its longitudinal axis, so that the first leg faces the false ceiling and preferably rests on this and the second leg is disposed between the ceiling and the false ceiling and in extension of the opening,
• Introducing at least one second cooling arm according to steps a) to c),
• Arranging the cooling arms such that the ends remote from the third leg of the respective second leg abut each other frontally and thus form a mounting surface for (thermally critical components of) luminaire components, and
• Attaching connecting elements for connecting the cooling arms with each other and fixing them to each other, preferably releasably and further preferably such that the connecting element connected to the abutting legs of all the cooling arms, preferably flat connected.

• Anbringen von Leuchtkomponenten, insbesondere Leuchtmitteln, wie einem LED-Modul, und vorzugsweise von Reflektoren und/oder Linsen oder dergleichen mittelbar über das Verbindungselement oder unmittelbar an der Montagefläche der aneinanderstoßenden Schenkel aller Kühlarme, wobei die Leuchtenkomponenten (Leuchtmittel und/oder andere thermisch kritische Bauteile der Leuchtkomponenten) vorzugsweise flächig mit dem Verbindungselement bzw. der Montagefläche verbunden werden.

By means of this method, the introduction of a large heat sink with a large heat transfer surface in a false ceiling with only small dimensions of the mounting hole and the height of the gap is easily possible. According to a further aspect, the invention relates to a method for installing a recessed luminaire according to the invention, which in addition to the steps for installing a heat sink further comprises the following final step:

• Attaching lighting components, in particular bulbs, such as an LED module, and preferably of reflectors and / or lenses or the like indirectly via the connecting element or directly to the mounting surface of the abutting legs of all the cooling arms, wherein the lighting components (lamps and / or other thermally critical components the luminous components) are preferably connected flat with the connecting element or the mounting surface.

Preferably, the connecting element is formed by a part of the luminaire component, so that the steps for attaching connecting elements and for attaching luminaire components are identical or at least overlap.

In the following, further advantages of the invention will be described by way of example with reference to exemplary embodiments according to the drawings of the accompanying figures.

Fig. 1

eine perspektivische Ansicht eines erfindungsgemäßen Kühlkörpers,

Fig. 2

eine Draufsicht auf den Kühlkörper gemäß Fig. 1,

Fig. 3

eine Seitenansicht eines Kühlarmes eines erfindungsgemäßen Kühlkörpers,

Fig. 4

eine Draufsicht auf den Kühlarm gemäß Fig. 3,

Fig. 5

eine seitliche Schnittansicht durch den Schnitt V-V in Fig. 2 einer erfindungsgemäßen Einbauleuchte mit einem Kühlkörper gemäß der Erfindung,

Fig. 6

einen Ausschnitt der Schnittansicht der Fig. 5 mit einer ersten Ausführungsform eines Verbindungselements,

Fig. 7

einen Ausschnitt einer seitlichen Schnittansicht einer erfindungsgemäßen Einbauleuchte mit einem Kühlkörper gemäß der Erfindung sowie einer zweiten Ausführungsform eines Verbindungselements,

Fig. 8

eine schematische Darstellung des Verfahrens zum Einbau einer erfindungsgemäßen Einbauleuchte,

Fig. 9

eine Gegenüberstellung einer Öffnung zum Einführen des Kühlkörpers in einer Zwischendecke sowie einer Draufsicht auf den Kühlkörper,

Fig. 10a

eine erste Ausgestaltungsform eines erfindungsgemäßen Kühlkörpers,

Fig. 10b

eine zweite Ausgestaltungsform eines erfindungsgemäßen Kühlkörpers,

Fig. 11

eine schematische Darstellung der konvektiven Wärmeabgabe eines Kühlarmes des erfindungsgemäßen Kühlkörpers,

Fig. 12

eine Schnittansicht durch eine Deckenkonstruktion zum Einbringen des erfindungsgemäßen Kühlkörpers bzw. der erfindungsgemäßen Einbauleuchte.

Show it:

Fig. 1

a perspective view of a heat sink according to the invention,

Fig. 2

a plan view of the heat sink according to Fig. 1 .

Fig. 3

a side view of a cooling arm of a heat sink according to the invention,

Fig. 4

a plan view of the cooling arm according to Fig. 3 .

Fig. 5

a side sectional view through the section VV in Fig. 2 a recessed luminaire according to the invention with a heat sink according to the invention,

Fig. 6

a section of the sectional view of Fig. 5 with a first embodiment of a connecting element,

Fig. 7

a detail of a side sectional view of a recessed luminaire according to the invention with a heat sink according to the invention and a second embodiment of a connecting element,

Fig. 8

a schematic representation of the method for installing a recessed luminaire according to the invention,

Fig. 9

a comparison of an opening for introducing the heat sink in a false ceiling and a plan view of the heat sink,

Fig. 10a

A first embodiment of a heat sink according to the invention,

Fig. 10b

a second embodiment of a heat sink according to the invention,

Fig. 11

a schematic representation of the convective heat output of a cooling arm of the heat sink according to the invention,

Fig. 12

a sectional view through a ceiling construction for introducing the heat sink according to the invention or the recessed luminaire according to the invention.

FIGS. 1 and 2 show a heat sink 1 for recessed lighting according to the invention. The heat sink 1 is preferably made of a good heat-conducting material in order to achieve a good cooling of thermally critical components of luminaire components of the recessed luminaire. Further preferably, the emissivity of the heat sink 1 is as high as possible to provide good heat transfer by radiation. As materials, for example, offer aluminum or aluminum alloys, the invention is not limited to the aforementioned materials.

The heat sink 1 has at least two cooling arms 10, 20, 30, 40, which preferably extend uniformly around the circumference of the heat sink 1 from its center to the outside and away from each other. According to the FIGS. 1 and 2 the heat sink 1 has four cooling arms 10, 20, 30, 40. However, it is also conceivable that the heat sink 1 has two, three or more than four cooling arms. If the heat sink 1 has more than two cooling arms, these are preferably arranged in a star shape in order to achieve the best possible heat distribution. The cooling arms 10, 20, 30, 40 are provided separately, so in particular not integrally formed with each other.

The following is related to the FIGS. 3 and 4 the embodiment of the cooling arms described by way of example with reference to a cooling arm 10, wherein the same applies to any other cooling arm 20, 30, 40. Corresponding features of the respective cooling arms are provided in the figures with reference numerals whose tens digit the associated cooling arm and their One place defines the corresponding element of the respective cooling arm.

The cooling arm 10 has a first leg 11 and a second leg 12 spaced from the first leg 11 and preferably arranged substantially parallel to the first leg. The two legs 11, 12 are connected to each other by at least one further leg 13 (hereinafter also referred to as the third leg). The first and second legs 11, 12 thus extend away from opposite ends of the third leg 13. According to the invention, the first leg 11 and the second leg 12 each extend from the third leg 13 in the opposite direction and away from each other.

Preferably, the cooling arm 10 by the thus arranged legs 11, 12, 13 in a substantially Z-shape. The Z-shape, in addition to the simple introduction of the cooling arm in a false ceiling, as will be described in more detail below, further has the advantage that the heat output is further increased by the design and arrangement of the legs, especially in Z-shape. Thus, the first leg 11 realizes a large area for effective heat dissipation, by allowing this, in conjunction with the orthogonal to the first leg 11 provided third leg 13 a good convective heat dissipation, as exemplified in FIG. 11 is shown by the arrow.

Preferably, the legs 11, 12, 13 are integrally formed with each other; For this purpose, they are made for example from a flat plate by means of forming process and thus form a cooling arm 10th

In order to make the heat-transmitting surface as large as possible, the first leg 11 preferably has a length which corresponds to a multiple of the length of the second leg 12 and, with reference to FIG. 9 5 times the diameter or edge length x of a mounting hole 140 ', 140 "in a false ceiling, for example, in spite of the length of the first leg 11, the mounting of the cooling arms 10 in the gap 130 and through the opening 140 is due the arrangement of the legs 11, 12, 13 to each other particularly easy to carry out, as will be described in more detail below.

Alternatively or additionally, the first leg 11 may be formed telescopically, so that its length is selectively adjustable. In this way, the heat transferring surface of the heat sink 1 can optionally be adapted to the conditions before or after the positioning of the cooling arms 10, 20, 30, 40; Thus, for example, after the introduction of the respective cooling arms 10, 20, 30, 40 are extended by a multiple, without the assembly of the heat sink 1 is impaired.

Related to the FIGS. 1 and 2 as well as the sectional views of the FIGS. 5 to 7 the arrangement of the cooling arms 10, 20, 30, 40 to each other is described below, which form the heat sink 1 in the arrangement shown or positioning. It should be noted that for the sake of clarity, the second cooling arm 20 in the sectional view of FIGS. 5 to 7 not shown.

It has already been described that the heat sink 1 according to the invention has at least two cooling arms 10, 20, 30, 40, which are initially present separately from one another. In particular with reference to FIGS. 1 . 2 and 5 are the Cooling arms 10, 20, 30, 40 arranged to form the heat sink 1 to each other such that the third leg 13, 23, 33, 43 remote from the ends 14, 24, 34, 44 of the respective second leg 12, 22, 32, 42 frontally abut. In this way, the second legs 12, 22, 32, 42 together form a mounting surface 2 for luminaire components 3, in particular for thermally critical components of the luminaire components. The mounting surface 2 is formed by the first legs 11, 21, 31, 41 facing surface of the second legs 12, 22, 32, 42. For forming the heat sink 1, the cooling arms 10, 20, 30, 40 are further provided such that their third legs 13, 23, 33, 43 all in the same direction with respect to. The mounting surface 2 extend or all in the same direction from the mounting surface 2 away.

In a particularly advantageous embodiment is how FIGS. 1 and 5 to 7 can be seen, of the abutting legs 12, 22, 32, 42, so of the mounting surface 2, and the third legs 13, 23, 33, 43, a space 4 limited. In this room 4, the lighting components 3 can be switched on or attached. The lighting components 3 comprise the lighting means (preferably LED modules) and may furthermore preferably comprise reflectors and / or lenses, as will be described in more detail below. These lighting components 3, in particular the thermally critical components thereof, are for this purpose preferably mounted on the mounting surface 2 in the space 4, as shown in FIGS Figures 5 and 6 is shown. By simply positioning the cooling arms 10, 20, 30, 40, in particular the Z-shaped cooling arms, a sufficiently large mounting and installation space 4 for attaching the lighting components 3 is automatically provided. The heat sink 1 thus serves at the same time as a mechanical support frame for the lighting components. 3

In a preferred embodiment, the frontally abutting ends 14, 24, 34, 44 are formed so that they are flush with each other to form a closed surface as a mounting surface 2. In this way, a large-area support for the thermally critical components of the lighting component 3 is provided in order to dissipate the resulting heat uniformly across all the cooling arms 10, 20, 30, 40 of the heat sink 1. In this heat dissipation is improved, since the heat sink, although composed of a plurality of individual cooling arms 10, 20, 30, 40, yet respect. The heat conduction is formed according to a one-piece body.

The frontally abutting ends 14, 16, 24, 26, 34, 36, 44 of the second leg 12, 17, 22, 27, 32, 37, 42 can each x x cooling arms an angle α, β of 180 ° / x with the _Longitudinal axis L _include the _{cooling arm of} the respective cooling arm 10, 15, 20, 25, 30, 35, 40. This is exemplary in the Figures 2 . 10a and 10b shown, the two embodiments for inventive heat sink 1, 1 'show. Thus, the heat sink 1 according to FIG. 2 and 10a four cooling arms 10, 20, 30, 40 on. The frontally abutting ends 14, 24, 34, 44 thus each include with the longitudinal axis L _{cooling arm of} the respective cooling arm an angle of (180 ° / 4 = 45 °). The second leg 12, 22, 32, 42 is thus formed in a triangular shape with a point tapering towards the center of the heat sink 1, which encloses a 90 ° angle. In the case of the embodiment of FIG. 10b the heat sink 1 'three cooling arms 15, 25, 35, whose frontally abutting ends 16, 26, 36 consequently each with the longitudinal axis L _{cooling arm of} the respective Cooling arm an angle of (180 ° / 3 = 60 °) include. As a result, the second legs 17, 27, 37 have a triangular shape with a point tapering towards the center of the heat sink, which in turn encloses a 120 ° angle. In this way, the heat sink with mutually aligned cooling arms on a closed surface as a mounting surface 2 for attaching the lighting components. In addition, the cooling arms are seen over the circumference of the heat sink 1 after their positioning evenly distributed to each other, resulting in a uniform heat distribution in the space 130 result. In particular, in the case of three or more cooling arms 10, 15, 20, 25, 30, 35, 40, a star-shaped heat sink can be provided, which enables uniform heat emission (cf. Figures 10a and 10b ).

Like that Figures 1, 2, 10a and 10b can be seen, the cooling arms 10, 20, 30, 40 are preferably identical. In this way, the same number of parts can be increased and assembly errors can be avoided. However, the invention is not limited thereto. Thus, the cooling arms can also have a different geometry and / or other dimensions / dimensions. Also, the preferably closed surface (mounting surface 2) can also be formed by non-identical end-side abutting ends of the cooling arms (or the second leg); In this case, the angles which are included by the frontally abutting ends of the second cooling arms and the longitudinal axis of the respective cooling arm, are not identical.

As in particular the FIGS. 6 and 7 can be seen, the heat sink 1 further comprises a connecting element for connecting and fixing the cooling arms 10, 20, 30, 40, preferably the abutting legs 12, 22, 32, 42, on. The connecting element is preferably on the Mounting surface 2 releasably or permanently attached, preferably screwed to the mounting surface 2. However, it is also conceivable that the connecting element other parts of the cooling arms 10, 20, 30, 40 fixedly connected to each other, such as, the third leg or the first leg.

Preferably, the connecting element may be formed from a part of a luminaire component 3. For this purpose, the lighting component 3, as in FIG. 6 shown, provided such that it connects the cooling arms 10, 20, 30, 40 of the heat sink 1 with each other. For this purpose, for example, an LED module, a circuit board, a transformer, a reflector or another component of the lamp component 3 in a detachable or non-detachable manner with the cooling arms 10, 20, 30, 40 (preferably with all second legs 12, 22, 32nd , 42 of the cooling arms 10, 20, 30, 40) of the heat sink 1 are connected. For this purpose, the part of the luminaire component 3 can be provided with holding elements which cooperate with corresponding holding devices of the heat sink 1 in a connecting manner. For this purpose, the holding device of the heat sink 1 is preferably provided on at least one, particularly preferably on all of the adjoining legs 12, 22, 32, 42; Preferably, in such a way that after attaching the lamp component 3, this is disposed within the space 4 formed by the abutting legs 12, 22, 32, 42 and the third legs 13, 23, 33, 43, as in, for example FIG. 6 is shown. For this purpose, the holding devices can have, for example, a bayonet connection, a screw connection, a latching connection or the like. However, it is also conceivable that the part of the luminaire component 3 for connecting the cooling arms 10, 20, 30, 40 is connected to these in an inseparable manner, for example by means of gluing or soldering. It is crucial that the connection only after positioning the cooling arms 10, 20, 30, 40 is provided in the intermediate space 130. A detachable connection has the advantage over an insoluble connection that replacement of the luminaire components 3, the heat sink 10, 20, 30, 40 or the entire recessed luminaire is possible even after their installation. In that the connecting element is formed by a part of the lamp component 3, in any case, only by providing the lamp assembly, the entire cooling structure can be easily and securely fixed.

Alternatively or in addition to the configuration of the connecting element through a part of the luminaire component 3, the connecting element may also have a ring or carrier ring 5. This preferably has a shape corresponding to the contour of the mounting surface 2; This is, for example, round or square. The carrier ring 5 is screwed to the cooling arms 10, 20, 30, 40, preferably in the region of the mounting surface 2 or connected in a detachable manner in other ways. It is also a permanent connection conceivable that can be provided in the space 130 after positioning the cooling arms 10, 20, 30, 40. However, the releasable connection has the advantage that the heat sink can be disassembled even after assembly.

As FIG. 6 can be seen, the ring 5 is preferably formed such that the thermally critical components of the lamp component 3 (eg. The lighting means, such as an LED module) within the ring 5 on the mounting surface 2 of the abutting legs 12, 22, 32, 42 can be mounted so that they are in communication with all the cooling arms 10, 20, 30, 40, preferably rests flat on the mounting surface 2. The ring 5 consequently surrounds the part of the luminaire component which is connected to the heat sink 1 laterally.

The design of the connecting element as a carrier ring 5 has the advantage that the heat sink 1 can be fixed independently of the lamp element 3 after positioning the cooling arms 10, 20, 30, 40. This allows in particular a simple replacement of a lighting means or other lighting components 3, such as. Reflectors or lenses, even after mounting the heat sink 1 and fixing the cooling arms 10, 20, 30, 40, without the connection between the cooling arms 10, 20, 30, 40 to solve. Since the thermally critical components of the luminaire components 3 (for example the LED module) are applied directly to corresponding areas (mounting surface 2) of the cooling arms 10, 20, 30, 40, this direct coupling can provide sufficient and uniform heat transfer and heat dissipation over all Cooling arms 10, 20, 30, 40 take place. In addition, the direct contact of the thermally critical components of the lamp component 3 with the cooling arms 10, 20, 30, 40 prevents additional thermal resistances to the component connections.

FIG. 7 shows another embodiment of a connecting element. According to the embodiment of the FIG. 7 this is designed as a (flat) plate 6, which also preferably has a shape corresponding to the contour of the mounting surface 2. The carrier plate 6 is preferably attached to the heat sink 1 such that it extends at least over the adjoining legs 12, 22, 32, 42 of all the cooling arms 10, 20, 30, 40 and is preferably in surface contact with the mounting surface 2, ie in FIG Contact with all cooling arms is 10, 20, 30, 40. This also allows a sufficient and uniform heat dissipation over all cooling arms 10, 20, 30, 40. The plate 6 is preferably designed as a heat spreader; in particular made of a good heat conducting material. In the case of uneven component connections, the unevenness is also compensated by the plate 6, so that a planar mounting surface 2 is provided for the luminaire components 3, in particular their thermally critical components. By the plate 6 as a heat spreader is thus minimized between the heat sink 1 and heat source, the thermal resistance of the component connections.

On the connecting elements or on at least one of the abutting legs holding devices for receiving lighting components 3 such as bulbs, in particular LED modules, or reflectors or lenses may be provided. The holding devices may be formed in any known form, for example as a bayonet connection, screw connection, latching connection or the like, which are connectable to corresponding holding elements of the lighting components 3. This allows a standardized design of the heat sink components and consequently a simple attachment of the lighting components. 3

The in the FIGS. 5 to 7 illustrated combination of a heat sink 1 according to the invention and a light source 3, in particular an LED module, is referred to as recessed luminaire E. For this purpose, the luminous means or the luminaire components 3 are preferably arranged so as to be planar over the connecting element 5, 6 or directly on the mounting surface 2 of the adjoining legs 12, 22, 32, 42 of all the cooling arms 10, 20, 30, 40.

The following is based on the FIG. 8 a method for installing a heat sink or a recessed luminaire described according to the invention.

In a first step, a first cooling arm 10 is introduced into a gap 130 between a raw ceiling 110 and a false ceiling 120. For this purpose, first the first leg 11 of the first cooling arm 10 is inserted into an opening 140 in the false ceiling 120 in the longitudinal direction of the cooling arm 10 and preferably obliquely to the false ceiling 120, wherein the cooling arm 10 is arranged such that the third leg 13 with respect Leg 11 extends substantially from the ceiling 110 away (see step 1). Then, the third leg 13 and the second leg 12 are inserted through the opening 140 into the space 130 substantially in the longitudinal direction of the third leg 13 (see step 2). The cooling arm 10 is thus located entirely within the intermediate space 130, with the third leg 13 extending from the first leg 11 in the direction of the intermediate wall 120. Finally, the cooling arm 10 is rotated in the intermediate space 130 by 180 ° about its longitudinal axis, so that the first leg 11 of the false ceiling 120 faces and preferably rests on this, and the second leg 12 between the ceiling 110 and the false ceiling 120 and in extension of Opening 140 is arranged (see step 3).

In a second step, according to the above description of the first step, at least one second or more cooling arms 20, 30, 40 are introduced into the intermediate space 130. Then, in a third step, the cooling arms 10, 20, 30, 40 arranged such that the third leg 13, 23, 33, 43 opposite ends 14, 24, 34, 44 of the respective second leg 12, 22, 32, 42nd abut each other. Thus, the second legs 12, 22, 32, 42 together form a mounting surface 2 in particular for the thermally critical components of the lighting components 3. With a corresponding configuration of the second leg 12, 22, 32, 42nd Thus, these preferably form a closed surface as a mounting surface 2. Together with the third legs 13, 23, 33, 43, the second legs 12, 22, 32, 42 further preferably delimit a space 4 which opens to the opening 140 of the intermediate wall 120 is (see step 4).

In a fourth step, connecting elements 3, 5, 6 are preferably releasably attached, for connecting the cooling arms 10, 20, 30, 40 with each other and fixing them to each other. For this purpose, the connecting element 3, 5, 7 is preferably provided such that it is connected to the abutting legs 12, 22, 32, 42 of all the cooling arms 10, 20, 30, 40, preferably connected flat (see step 4).

To provide a recessed luminaire E, in the latter case, the luminous components 3 must also be attached after the attachment of the connecting element, in particular luminous means, such as, for example, an LED module. Furthermore, additional optical elements, such as, for example, reflectors 7 and / or (scattering) lenses 8 or the like can be provided. These can be attached indirectly via the additional connecting element (carrier plate 6) or directly to the mounting surface 2 of the adjoining legs 12, 22, 32, 42 of all the cooling arms 10, 20, 30, 40, wherein the luminaire components (3, bulbs and / or others thermally critical components of the luminous components) are preferably connected flat to the connecting element (5, 6) or the mounting surface (2).

For attaching the luminaire components 3 are preferably on the connecting element 5, 6 or at least one of the abutting legs 12, 22, 32, 42 holding devices for receiving the luminaire components 3 as bulbs, in particular LED modules or reflectors or lenses provided. The holding devices also have, for example, a bayonet connection, a screw connection, a latching connection or the like, which can be connected to corresponding holding elements of the luminaire components 3.

It should be noted that a part of the luminaire components 3 may form the connecting element, so that with the attachment of the luminaire components 3 (for example of the luminous means, such as an LED module) on the one hand the heat sink 1 and at the same time one recessed luminaire E is provided. In this case, the step of attaching fasteners and mounting luminaire components are identical or at least overlap. On the other hand, the connecting element can also be provided by a support plate 6 or a support ring 5 or the like.

By means of this method, the introduction of a large heat sink with a large heat transfer surface in a false ceiling with only small dimensions of the mounting hole and the height of the gap is easily possible.

It should be noted that each releasable and in particular each non-releasable connection for connecting the cooling arms with each other is made only after the insertion of the individual cooling arms in the space and aligning or positioning thereof.

The invention is not limited to the above-described embodiments, as long as it is encompassed by the subject matter of the following claims. All features and embodiments of the embodiments are in any Interchangeable with each other as long as they are encompassed by the subject matter of the following claims.

Claims (15)

Heat sink (1) for recessed luminaires (E), in particular LED recessed luminaires, comprising: at least two separately provided cooling arms (10, 20, 30, 40), wherein a cooling arm (10, 20, 30, 40) each comprises: - A first leg (11, 21, 31, 41), and a second leg (12, 22, 32, 42) spaced from the first leg (11, 21, 31, 41) and preferably arranged substantially parallel to the first leg (11, 21, 31, 41), - Wherein the first leg (11, 21, 31, 41) and the second leg (12, 22, 32, 42) by at least one third leg (13, 23, 33, 43) are interconnected and each of the third Legs (13, 23, 33, 43) in opposite directions and away from each other, wherein the at least two cooling arms (10, 20, 30, 40) are arranged relative to one another such that the ends (14, 24, 34, 44) of the respective second legs (12, 13) remote from the third leg (13, 23, 33, 43) , 22, 32, 42) abut against one another at the front side and thus form a mounting surface (2) for luminaire components (3), and the third legs (13, 23, 33, 43) all extending in the same direction away from the mounting surface (2), and a connecting element (3, 5, 6) for preferably releasably connecting and fixing the cooling arms (10, 20, 30, 40), preferably the abutting leg (12, 22, 32, 42). Heatsink (1) according to claim 1, wherein the legs (11, 12, 13, 21, 22, 23, 31, 32, 33, 41, 42, 43) are arranged to each other such that the cooling arm (10, 20, 30 , 40) has a substantially Z-shape. Cooling body (1) according to one of the preceding claims, wherein the cooling arms (10, 20, 30, 40) of the heat sink (1) are identical. Heat sink (1) according to one of the preceding claims, wherein the first leg (11, 21, 31, 41) has a length which corresponds to a multiple of the length of the second leg (12, 22, 32, 24) and a multiple of the diameter or the edge length (x) of a mounting opening (140) in a false ceiling (120). Heatsink (1) according to one of the preceding claims, wherein the first leg (11, 21, 31, 14) is telescopically formed, so that its length is selectively adjustable. Heat sink (1) according to one of the preceding claims, wherein the frontally abutting ends (14, 24, 34, 44) are formed so that they are flush with each other to form a closed surface as a mounting surface (2). Heatsink (1) according to one of the preceding claims, wherein the frontally abutting ends (14, 24, 34, 44) at x cooling arms at an angle of 180 ° / x with the longitudinal axis (L _{cooling arm} ) of the respective cooling arm (10, 20, 30 , 40). Heat sink (1) according to one of the preceding claims, wherein of the adjoining legs (12, 22, 32, 42) and the third legs (13, 23, 33, 43) a space (4) is limited, in the lamp components (3 ) as light-emitting means (3), in particular LED modules, and preferably reflectors (7) and / or lenses (8) are preferably attachable to the mounting surface (2). Heatsink (1) according to one of the preceding claims, wherein on the connecting element (3, 5, 6) or at least one of the abutting legs (12, 22, 32, 42) holding devices for receiving lighting components (3) such as light sources, in particular LED Modules, or reflectors (7) or lenses (8) are provided,
wherein the holding devices preferably has a bayonet connection, a screw connection, a latching connection or the like, which can be connected to corresponding holding elements of the luminaire components (3). Heat sink (1) according to one of the preceding claims, wherein the connecting element (3, 5, 6) is formed by a part of a lamp component (3) and / or a ring (5) or a plate (6), preferably on the Mounting surface (2) are arranged,
wherein, when the connecting element (5) has a ring (5), the ring (5) is preferably designed such that luminaire components (3), such as an LED module, within the ring (5) on the mounting surface (2) the adjoining legs (12, 22, 32, 42) are mountable with all the cooling arms (10, 20, 30, 40) are in communication, preferably on the mounting surface (2) lie flat, and
wherein, when the connecting element (6) comprises a plate (6), the plate (6) is preferably mounted so as to extend at least over the abutting legs (12, 22, 32, 42) of all the cooling arms (10, 20, 30) , 40) and preferably in surface contact with the mounting surface (2). Recessed luminaire (E) comprising a heat sink (1) according to one of the preceding claims and a light source (3), in particular an LED module, indirectly via the connecting element (3, 5, 6) or directly on the mounting surface (2) of the abutting Leg (12, 22, 32, 42) of all cooling arms (10, 20, 30, 40) is preferably arranged flat. Recessed luminaire (E) according to claim 11, wherein the luminaire components (3), like the luminous means and preferably also reflectors and / or lenses, on holding devices of the connecting elements (5, 6) or at least one of the abutting legs (12, 22, 32, 42 ) is mounted by means of corresponding holding elements of the lamp component (3). Method for installing a heat sink (1) according to one of Claims 1 to 10, comprising the following steps: - Introducing a first cooling arm (10) in a space (130) between a raw ceiling (110) and a false ceiling (120) according to the following steps: a) inserting the first leg (11) in an opening (140) in the false ceiling (120) in the longitudinal direction the cooling arm (10) and preferably oblique to the false ceiling (120), the cooling arm (10) being arranged such that the third leg (13) extends substantially away from the ceiling (110) with respect to the first leg (11); b) inserting the third leg (13) and the second leg (12) through the opening (140) into the intermediate space (130) substantially in the longitudinal direction of the third leg (13), c) rotating the cooling arm (10) in the space by 180 ° about its longitudinal axis (L _{cooling arm} ), so that the first leg (11) of the false ceiling (120) faces and preferably rests on this, and the second leg (12) between the ceiling (110) and the false ceiling (120) and in extension of the opening (140) is arranged, Inserting at least one second cooling arm (20, 30, 40) into the intermediate space (130) according to steps a) to c), Arranging the cooling arms (10, 20, 30, 40) such that the ends remote from the third leg (13, 23, 33, 43) (14, 24, 34, 44) of the respective second legs (12, 22, 32 , 42) abut one another at the end face and thus form a mounting surface (2) for luminaire components (3), and - Attaching of connecting elements (3, 5, 6) for connecting the cooling arms (10, 20, 30, 40) with each other and fixing them to each other, preferably releasably and further preferably such that the connecting element (3, 5, 6) with the abutting Legs (12, 22, 32, 42) of all cooling arms (10, 20, 30, 40) connected, preferably flat connected. Method for installing a recessed luminaire (E) according to one of claims 11 or 12, comprising the steps according to the method according to claim 13 and further comprising the concluding step: - Mounting of lighting components (3), in particular bulbs, such as an LED module, and preferably of reflectors (7) and / or lenses (8) or the like indirectly via the connecting element (5, 6) or directly to the mounting surface (2) the abutting legs (12, 22, 32, 42) of all the cooling arms (10, 20, 30, 40), wherein the lighting components (3) are preferably flat connected to the connecting element (5, 6) or the mounting surface (2). A method according to claim 14, wherein the connecting element is formed by a part of the luminaire component (3).

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