EP2322847A2 - Variable LED downlight - Google Patents

Abstract

The down light has a carrier structure (2) for installation or mounting in or at a cover with an opening (6) for emitting light of the down light. The opening is fixed by a frame of the carrier structure. A cooling body (16) is attached at the carrier structure or a light emitting diode arrangement is attached at the cooling body in two different installation positions such that the light emitting diode arrangement provided with different distances against the opening of the carrier structure. The light emitting diode arrangement is attached at the cooling body.

Description

The invention relates to a downlight which utilizes LEDs as light sources (light emitting diodes, which also include organic light emitting diodes).

Downlights are often used as recessed ceiling luminaires (or ceiling mounted luminaires) to illuminate interiors. As built-in or surface-mounted luminaires, these must have a compact design. When using LEDs as bulbs in downlights there is the particular difficulty that the high-power LEDs require a large heat sink, which is not easily integrated into the downlight.

An example of a downlight using the LED technology is in DE 10 2008 009 814 A1 described.

For different room heights and different lighting tasks different optics for downlights are desirable. However, the known constructions are not very flexible in this respect.

It is the object of the present invention to provide a downlight based on LED technology, which can be variably adjusted for different lighting tasks.

The object is achieved according to the invention by a downlight comprising: a support structure for installation or mounting in or on a ceiling with an opening defined by a frame of the support structure for the light exit of the downlight, a heat sink, which is held on the frame structure,
at least one LED assembly thermally connected to the heat sink and mechanically attached to the heat sink,
and at least one reflector assembly extending from the LED array toward the opening of the support structure, the heat sink being attachable to the support structure in at least two different mounting positions, such that the LED array mounted on the heat sink is at different distances from the opening the carrying structure assumes.

Alternatively or in addition to the feature that the heat sink can be attached to the support structure in at least two different installation positions, it can also be provided that the LED arrangement can be attached to the heat sink in at least two different installation positions, such that the LED attached to the heat sink -Anordnung different distances relative to the opening of the support structure assumes.

This construction makes it possible to use different reflector assemblies for the same downlights. For example, relatively long reflectors are necessary for particularly low-beam downlights. These can be mounted on the LED assembly when the heat sink is in the installed position in which it has a relatively large distance from the opening of the support structure. For broader downlights, a shorter reflector assembly is often desirable. This can be provided on the downlight according to the invention, when the heat sink is mounted in the installed position with a smaller distance from the opening of the support structure.

According to a preferred embodiment, the reflector assemblies extend at least over the entire distance between the LED array and the opening of the support structure. A reflector assembly that is shorter than the distance between the LED array and the opening of the support structure would result in a light exit above the lower edge of the downlights and thus light loss due to absorption in the housing or in a light trap on the housing. It is therefore preferred that the reflector assembly extends at least as far as the lower edge of the downlight. According to some embodiments, the edge of the reflector assembly may also project downward beyond the opening of the downlight. According to a preferred embodiment, however, is the edge of the reflector assembly, which defines the light exit opening of the reflector assembly, in the same level as the edge of the opening of the support structure, which is located, for example, in the installed state of the downlight at the level of the underside of the ceiling, in which the downlight is installed. This results in a uniform picture when viewing the ceiling from below, because no parts protrude. By mounting the heat sink according to the invention in at least two different heights within the downlight, the downlights for different reflector assemblies can be adjusted so that the edge of the reflector assembly and the edge of the opening in the support structure are always at the same height or a predetermined distance, eg for recording a cover plate or to form a shadow gap, have.

According to a preferred embodiment, the LED arrangement is attached to a surface of the heat sink facing the opening of the support structure, preferably removable. For example, the surface of the heat sink may extend parallel to the plane defining the opening in the support structure. As a result, LED arrays can be mounted with their Hauptanstrahlrichtung down on the heat sink in good thermal contact with this.

According to one embodiment of the invention, the surface of the heat sink may have a plurality of positions for mounting the LED array or for attaching a plurality of LED arrays. In this embodiment, one or more LED arrays can be mounted in different positions in the downlight within the downlight, whereby different light distributions can be achieved with the same or different reflector assemblies. Furthermore, the same downlights can be equipped with a different number of LED assemblies to produce downlights of different light intensity and light distribution.

According to a preferred embodiment, the plurality of positions for attaching LED arrays each have separate, preferably separately controllable, electrical connection means for the LED arrays. The wiring may be attached to the heatsink or loosely routed. As a result, the downlight can be variably equipped with LED arrangements at the installation site without having to change the wiring. The separate controllability of the connection means, it is also possible, the same downlight with multiple LED arrangements for different lighting tasks, for example lighter or darker, or for different light distributions, or different light colors use.

According to one embodiment, the reflector assembly has a rotationally symmetrical reflector surface. These reflectors are suitable for generating a circular light field contour of the illumination plane. However, according to another embodiment, the reflector surface may also be asymmetrically shaped. For example, with such downlights a wall which is adjacent to the position of the downlight in the ceiling can be illuminated. Of particular advantage is that the same downlight can be equipped with different reflector assemblies. The different heights of the reflector assemblies can be compensated by the inventive different installation positions of the heat sink in the support structure.

According to one embodiment, the LED assembly is mounted in a plane on the heat sink, which is inclined relative to a plane which defines the opening of the support structure. This arrangement is preferred for asymmetrically radiating downlights. Inclination angles between 10 ° and 80 °, preferably between 20 ° and 60 °, in particular preferably between 30 ° and 60 °, can be provided. The LED array can be attached to the heat sink either directly or via a planar board which is plugged into a surface of the heat sink. In these embodiments, the surface of the heat sink to which the LED array is attached may be inclined to the predetermined angle relative to the plane defining the opening of the support structure. However, according to an alternative embodiment, the LED arrangement may also be attached to the heat sink via a carrier, for example via an angled circuit board or metal body. In this embodiment, the surface of the heat sink, which is adapted for mounting the LEDs, parallel to the plane which defines the opening of the support structure may be provided. This embodiment is particularly suitable for use with different LED arrays and reflector assemblies. The same downlight, ie with the same heat sink, can be used with a surface-mounted LED array for emitting light vertically downwards or with an asymmetric light output LED array mounted on an angled board.

The LED array for a downlight of the present invention may include a plurality of colored LEDs, particularly LEDs having different colors, e.g. Red, green and blue. The colors red, green and blue, for example, produce white light. The LED arrangement or a plurality of LED arrangements can also be controlled differently, so that color effects of the downlight can be set by the differently colored LEDs. According to an alternative embodiment, LEDs with white light can also be used.

According to one embodiment of the present invention, the cooling body has a plurality of cooling ribs, wherein some cooling ribs are shortened with respect to the other cooling ribs of the cooling body or have recesses in order to adapt the peripheral shape of the cooling body to the support structure. The support structure includes, for example, a plurality of approximately perpendicular to the ceiling support. These limit the space available for the heat sink. In order to provide a heat sink with the largest possible surface, correspondingly long cooling fins are desired. By shortening or cutting out only a few cooling fins, however, the total cooling capacity of the heat sink is not significantly reduced. However, the heat sink can thereby be adapted to the available space in the support structure.

According to a preferred embodiment, the maximum diameter of the heat sink in cross-section parallel to a plane defined by the opening of the support structure is smaller than the maximum diameter of the opening in the support structure in said plane. With this construction, the heat sink can still be installed and removed even in the installed state of the downlight through the opening which defines the support structure. Replacement of the electronic components that are mounted on the heat sink is therefore possible without having to remove the support structure from the ceiling.

According to a preferred embodiment, the heat sink has a copper core and / or a copper base side. By the material copper, compared to the usual aluminum, an even higher thermal conductivity is achieved, so that a sufficient cooling of the LEDs can be achieved even with relatively small size of the heat sink. The copper core extends in particular in the longitudinal direction of the heat sink vertically to the mounting plane of the downlight. This allows long heatsinks produce with a small diameter. Due to the vertical mounting direction, the mounting and removal of the heat sink and the mounting of the heat sink in different mounting positions is possible because no projections of the heat sink protrude over the support structure in a vertical direction relative to the mounting plane of the downlight.

According to one embodiment of the invention, the heat sink is partially surrounded by a jacket which has fastening means for fastening to the support structure. According to an alternative embodiment, the fastening means, such as e.g. Hooks or boards, also be integrated directly on the heat sink.

According to a further aspect of the invention, a downlight system is also provided which comprises at least one downlight according to one of the previously described embodiments, wherein the downlight system further comprises at least two reflector assemblies that produce a different light distribution, in particular at least two reflector assemblies with different height and / or with rotationally symmetrical and asymmetrical reflector. If the reflector system has at least two reflector assemblies, but both have the same height, according to an independent aspect of the invention, the support structure of the downlight can also provide only a mounting position of the heat sink.

Figur 1

zeigt ein Downlight in perspektivischer Ansicht von der Seite.

Figur 2

zeigt das Downlight nach Figur 1 in perspektivischer Ansicht von schräg oben.

Figuren 3a und 3b

zeigen den Kühlkörper des Downlights nach Figur 1 in perspektivischer Ansicht bzw. in Aufsicht von unten.

Figuren 4a und 4b

zeigen den Kühlkörper des Downlights nach Figur 1 mit Mantel mit bzw. ohne Reflektorbaugruppe.

Figuren 5a bis 5d

zeigen Querschnitte durch verschiedene Ausführungsformen des Down- lights, wobei das Gehäuse und der Kühlkörper des Downlights nur schematisch dargestellt sind.

Figur 6

zeigt einen Kühlkörper mit einem Mantel und einem Reflektorhaltering gemäß einer weiteren Ausführungsform.

Figur 7

zeigt den Mantel, den Reflektor und den Reflektorhaltering nach Figur 6 in Explosionsansicht.

Figur 8

zeigt einen Distanzring der alternativen Ausführungsform nach Figur 6.

Figur 9

zeigt den Kühlkörper, den Distanzring und den Reflektorhaltering nach der alternativen Ausführungsform der Figur 6.

Figuren 10a-10c

zeigen Querschnitte durch drei weitere Ausführungsformen von jeweils einem Kühlkörper und alternativen Leuchtmitteln und Reflektorbau- gruppen.

Figuren 11a-11c

zeigen perspektivische Ansichten der Ausführungsformen nach den Figuren 10a-10c.

A preferred embodiment of the invention will be described below with reference to the accompanying drawings. The figures show the following:

FIG. 1

shows a downlight in perspective view from the side.

FIG. 2

shows the downlight after FIG. 1 in a perspective view obliquely from above.

FIGS. 3a and 3b

show the heat sink of the downlight FIG. 1 in perspective view or in a plan view from below.

FIGS. 4a and 4b

show the heat sink of the downlight FIG. 1 with jacket with or without reflector assembly.

FIGS. 5a to 5d

show cross sections through various embodiments of the down lights, the housing and the heat sink of the downlight are shown only schematically.

FIG. 6

shows a heat sink with a jacket and a reflector retaining ring according to another embodiment.

FIG. 7

shows the jacket, the reflector and the reflector retaining ring FIG. 6 in exploded view.

FIG. 8

shows a spacer ring of the alternative embodiment according to FIG. 6 ,

FIG. 9

shows the heat sink, the spacer ring and the reflector retaining ring according to the alternative embodiment of the FIG. 6 ,

Figures 10a-10c

show cross sections through three further embodiments, each of a heat sink and alternative light sources and Reflektorbau- groups.

Figures 11a-11c

show perspective views of the embodiments according to the Figures 10a-10c ,

Referring to the FIGS. 1 and 2 is a complete view of an embodiment of the downlight according to the invention. The illustrated embodiment is intended for installation in a section of a false ceiling. In this case, the downlight can be introduced directly into a ceiling cutout in the embodiment shown. alternative The illustrated Downlight can also be mounted in a mounting frame, which in turn is mounted in the ceiling.

A support structure 2 has a circular circumference, wherein the side walls of the support structure on the outside of cut-outs are approximately cylindrical and on the downwardly facing in the installation side of the support structure, a circumferential flange 4 is provided, which extends beyond the cutout in the ceiling or beyond the clear width of a ceiling mounting frame, which in turn is secured in the ceiling cutout, protrudes. The flange 4, together with the lower portion in the cylindrical side wall of the support structure 2, forms a continuous frame defining an opening 6 on the inside intended for the light exit of the downlight.

According to the embodiment shown, the opening 6 is sized so that all components of the downlight, which are fastened within the support structure 2, can be mounted through the opening. However, in an alternative embodiment, the opening may be smaller, in which case the components are mounted in the support structure before the downlight is inserted into the ceiling.

The support structure 2 comprises, on two opposite sides along its circumference on the side opposite the light exit side, two support arms 8, which on the side facing inwards have fastening means for holding the components in the support structure. In the illustrated embodiment, two support arms 8 are provided which extend upwardly from the support structure 2. According to an alternative embodiment, in particular for heavier and larger downlights, a plurality of support arms 8 may be provided. The fastening elements on the inside of the support arms can also be integrated in a continuous wall of the support structure 2.

The support arms 8 have on the inwardly directed side (not shown in the figures) projections which cooperate with spring elements 10. The support arms in particular have two projections or indentations in which spring tongues 12 of the spring element 10 can engage and engage. The locking mechanism is designed that lying in the interior of the support structure components can be engaged in two different heights H and H '.

Referring to the FIGS. 4a and 4b only the components of the downlight are shown, which are arranged in the interior of the support structure 2. The spring elements 10 are mounted on the outside of a cylindrical shell 14, on projections of this. The cylindrical shell 14 receives in the interior of a heat sink 16, which as a single component in the FIGS. 3a and 3b is shown.

The heat sink 16, which is formed of aluminum with a copper core 20 is approximately star-shaped in cross-section, as in the FIG. 3b , which shows the view from below of the heat sink, can be seen. The fins 18, 19 of the heat sink are different lengths. The fins 18 on two opposite sides of the core 20 are made slightly longer than the fins 19, which adjoin two other areas of the core 20. The shape of the fins is tuned so that the heat sink fits into the two-cut cylindrical shell 14 and can be firmly connected to it. Here, the total diameter of the combination of cylindrical jacket 14 and the heat sink 16 is determined so that it can be passed through the opening 6 of the support structure 2. The advantage of the uneven cooling fins 18 and 19 is that the available space within the support structure 2 can be utilized as best as possible. In the region of the support arms 8, within which the fastening means for supporting the springs 12 must be arranged, there is less space available, so that the cooling fins 19 are shorter in this peripheral region. In the other sections, in which the cylindrical shell is also cut out, more space is available in the diameter, so that the corresponding cooling ribs 18 can be made slightly longer. The existing space is thereby optimally utilized.

The core 20 of the heat sink 16 is formed in the illustrated embodiment of copper. This has the advantage that the base side of the core 20 is in good thermal contact with the fins over the entire height of the heat sink. As a result, relatively long heat sinks can be formed, which are able to dissipate the heat which is introduced at the base side of the heat sink, ie, the side facing the light exit side of the core 20.

On the base side of the core 20, electrical connection means 22 as well as mechanical fastening means for an LED arrangement or the LED arrangement are directly attached. In the embodiment shown, a position is available to which an LED arrangement (not shown in the figures) can be attached. In alternative embodiments, a plurality of such positions can also be provided, to which optionally LED arrangements can be attached.

Furthermore, the connection means 22 are also for fixing a reflector assembly 24, which, for example, in FIG. 4b can be seen, set up. The reflector assembly 24 extends in the mounted state of the downlight between the side facing toward the light exit side of the heat sink 16 up to the height of the opening 6, which is defined within the flange 4.

In accordance with one aspect of the invention, various reflector assemblies 24 are provided which may optionally be provided on the downlight to produce the desired light distribution of the downlight. The FIGS. 5a to 5d show in cross section various embodiments of reflector assemblies 24 to 24 ''', which are attached to the downlight. The reflector assemblies 24 and 24 '(in the FIGS. 5b and 5c shown) have a rotationally symmetrical reflector surface 25 or 25 ', which extend along an optical axis which is aligned with the downlight along the mid-perpendicular of the luminaire. The reflector assembly 24 'further has a cylindrical projection which connects directly to the side of the heat sink 16, on which the LEDs are arranged. The heights, ie the longitudinal extent of the reflector assemblies along the optical axis, are different. The reflector assemblies with greater height H, such as the reflector assembly 24, is intended for low-beam downlight, while the reflector assembly 24 'is provided with a lesser height H' for wide-beam downlights. The height H or H 'can be compensated by the adjustability of the heat sink 16 within the support structure 2. In the illustrated embodiment, at least two locking positions are provided, in which the heat sink can be held within the support structure 2. According to further embodiments, however, more locking positions or even a continuous adjustment of the heat sink 16 may be provided within the support structure 2.

The FIGS. 5a and 5d show examples of reflector assemblies 24 "and 24"', respectively, which have an asymmetrical reflector wall 25 "and 25", respectively. These downlights are preferred when an object which is attached to a wall or the wall itself is to be illuminated, which is located next to the installation location of the downlight FIG. 5a is the reflector assembly, as well as in the FIGS. 5b and 5c , at the base of the heat sink, which is aligned parallel to the mounting plane of the downlight attached. According to the embodiment according to FIG. 5d the LEDs are arranged on an angled support plate 26 or a metal sheet, for example of aluminum, which is attached to the base side of the heat sink. The support plate 22 is angled at an angle α, which may for example be between 20 ° and 60 °. This embodiment is particularly preferred in combination with a reflector assembly 24 "'having an asymmetric reflector wall 25'". These reflectors can also be made rectangular.

The reflector assemblies 24 may be connected in a component to the LED array. In the embodiment according to FIG. 5d Further, the angled support board 26 may also be connected to the reflector assembly 24 "in one component The reflector assemblies, including the LED arrays, may be plugged into and electrically connected to the heatsink connectors 22 Reflector assemblies are attached to the connection means on the heat sink or on the LED assembly regardless of the LED arrangements.

With reference to the FIGS. 6 to 9 a further alternative embodiment of the invention will be described below. The FIGS. 6 to 9 represent in different arrangements, the components which in the support structure 2 according to FIG. 1 be inserted. The support structure is for a better overview in the FIGS. 6 to 9 not shown.

In the alternative embodiment according to the FIGS. 6 to 9 a heat sink 116 is provided which has LEDs on the side facing the light exit surface (not shown in the figures). This is followed by a reflector 124, which, however, in contrast to the previously described embodiments is not directly connected to the heat sink or the LED assemblies, but by means of a reflector retaining ring 130 on a cylindrical shell 114 is fixed, wherein the cylindrical shell 114 receives the heat sink 116.

In the exploded view according to FIG. 7 the connection between the reflector retaining ring 130, the reflector 124 and the cylindrical shell 114 is explained. The reflector retaining ring 130 consists of two ring half-shells 132, each having a semicircular groove 134 in the lower region, in which the reflector 124 engages at its largest diameter on the light exit side. The final fixation of the reflector 124 to the reflector retaining ring 130 is achieved when both ring half-shells 132 are joined together and locked together. For this purpose, a latching nose 136 or on the opposite end face a latching recess 138 is provided at the front edges of the ring half shells 132, respectively. Further, for easy assembly of the ring half shells 132 guide pins 140 are provided on the end faces, which engage in recesses on the opposite side of the other ring half-shell 132. In order to fix the reflector 124 without play in the reflector retaining ring 130, a spring clip 142 is furthermore provided in each annular half shell 132, which additionally presses the reflector against the lower edge of the semicircular groove 134.

Once the reflector 124 is mounted in the composite reflector retaining ring 130, this subassembly may be connected to the cylindrical shell 114 and thereby also indirectly to the heat sink 116. For this purpose, locking lugs 144 are provided on the reflector retaining ring 130 on the side opposite the light exit surface of the reflector, which latch into opposite recesses in the cylindrical shell 114 (see FIG FIG. 7 ). The heat sink 116 can be received in the cylindrical shell 114 at different heights depending on the height of the reflector 124. For this purpose, a spacer ring 150 (see FIG. 8 ), which is disposed between the reflector retaining ring 130 and the heat sink 116. The spacer ring 150 is located with its lower edge on the upper edge 139 of the reflector retaining ring 130. On the opposite edge of the spacer ring 150 of the heat sink 116 is located. The height of the spacer ring 150 is matched to the height of the reflector 124, so that the upper edge of the reflector 124 is approximately flush with the lower surface of the heat sink, on which the LEDs are arranged, adjacent. For different height reflectors 134, the spacer ring 150 can be modified. For this purpose, at the top of the spacer ring 150 in the perimeter several tabs 152 attached, which can be canceled if necessary. As a result, the height of the spacer ring 150 and, consequently, the distance between the lower edge of the heat sink 116 and the reflector retaining ring 130 changes. Of course, various spacer rings 150 may be provided depending on the reflectors 124 used, which define a height, with or without tabs 152 is adapted to the height of the reflector 124.

On the upper side of the heat sink 116, a spring 160 is provided (see FIG. 6 ), which is supported on the cylindrical shell 114 and presses the heat sink 116 in the direction of the spacer ring 150, so that the heat sink is held in the cylindrical shell 114 at the desired height.

According to an alternative embodiment, the spacer ring 150 may also be supported on the cylindrical shell, for example on a step or a projection of the cylindrical shell. This embodiment has the particular advantage that the spring force which is exerted by the spring 160 on the heat sink 116, not the latching connection between the reflector retaining ring 130 and the cylindrical shell 114 charged. The spacer ring 150 may be configured as described in the previous embodiment.

The preassembled subassembly comprising the heat sink 116, the cylindrical shell 114, the spacer ring 150 and the reflector retaining ring 130 can then be arranged in the support structure 2, in principle as in FIG FIG. 1 shown inserted. Due to the possibility of adapting the spacer ring to the height of the reflector, this embodiment can be any desired reflector assembly mounted so that the lower edge of the reflector is flush with the light exit surface of the downlight. The position of the cylindrical shell 114 with respect to the support structure 2 in this embodiment also remains the same for different reflector heights H. In other embodiments, it may also be provided that between the light exit surface of the downlight and the lower edge of the reflector nor a cover plate or a shadow gap is provided. In this case, the heat sink and the reflector is arranged correspondingly higher.

According to one aspect of the invention, various embodiments of the previously described downlights are provided as a downlight system. In the downlight system the different reflector assemblies are interchangeable and can each be connected to the same downlight, ie in particular the same support structure 2 and the same heat sink 16 or 116. In such a downlight system, the selection of the light distribution to be generated can still be selected on site during assembly, because all the components are compatible with each other and in particular the installation position of the heat sink can be selected according to the reflector assembly provided.

Referring to the Figures 10a-c and 11a-c three further embodiments of Downlightsystemen are shown, each in a support structure (in the Figures 10a-c and 11a-c not shown) can be mounted by means of receptacles 211 in the form of protruding elements. In all three embodiments, the basic components of a heat sink 216 and a reflector 224 are formed, which is attached by means of a mechanical connection to the heat sink 216 at a predetermined distance to a contact surface for the lamps. The modifications of the three embodiments consist in different light sources and reflector attachments. In the embodiment according to FIG. 11a the light source is formed by an LED module 222 which directly adjoins a plane of the heat sink 216 and extends to an upper edge of the reflector 224. In the embodiment of the FIGS. 10b and 11b a lower level LED module 222 'is provided which is mounted in a socket 221 located at the bottom of the heat sink 216. Also in this embodiment, there is a thermal connection between the LED module 222 'and the heat sink 216 via the socket 221. In the third embodiment of the Figures 10c and 11c For example, an LED module 222 "is provided directly on the support board 226 attached to the heat sink 216. In this embodiment, the LED module further includes a scattering dome 228 that extends across the LEDs and provides light scattering Module 222 "of the last embodiment has a significantly lower height than the other LED modules. To compensate for the distance to the top edge of the reflector 224, the final embodiment provides an auxiliary reflector 224 'which fills the gap between the reflector 224 and the LED module 222 ". preferably as in the FIG. 11c shown, can be joined together seamlessly and form a uniform reflector surface. However, the same reflector component 224 may also be used individually for the other embodiments with the LED modules 222 and 222 '. According to the Embodiment after FIG. 10b and 11b Furthermore, between the LED module 222 'and the upper edge of the reflector 224 a Abblendring 227 is arranged, which forms a gap-free connection between the LED module 222' and the reflector upper edge to prevent light leakage.

In all three embodiments of FIGS. 10a to 10c 11a to 11c, the heat sink 216 can be mounted in at least two different heights in the support structure that can be mounted on the ceiling side, so that the arrangement of the LEDs, which is integrated in the LED module of the various embodiments, different heights compared to Assume carrying structure. Furthermore, given the modular design of the reflector assembly of at least one reflector and optionally an intermediate reflector or Abblendring given the opportunity to attach different height LED assembly to each of the same heat sink. In this way, z. B. use different LED light sources of different geometries or different performance classes. Furthermore, by using different LED assemblies or inserting an intermediate piece, such as socket 221, the design allows the LED assembly to be mounted at different heights with respect to the mounting surface of the heat sink. In this way, the distance between the attached to the heat sink LED assembly and the opening of the support structure can also be adjusted.

LIST OF REFERENCE NUMBERS

2

support structure

4

flange

6

opening

8th

support arm

10

spring elements

12

spring tongue

14

cylindrical jacket

16

heatsink

18

Slats, long

19

Slats, short

20

core

22

Connection means for LED arrangement

24, 24 ', 24 ", 24"'

reflector assembly

25, 25 ', 25 ", 25"'

reflector wall

26

carrier board

114

cylindrical matel

116

heatsink

124

reflector

130

Reflector retaining ring

132

Ring shells

134

groove

136

locking lug

138

latching depression

139

edge

140

guide pins

142

locking lug

144

locking lug

150

spacer

152

flap

160

retaining spring

211

Pickup for carrying structure

216

heatsink

221

version

222, 222 ', 222 "

LED module

224, 224 '

reflector assembly

226

carrier board

227

anti-glare

228

white diffuser

Claims (15)

Downlight, which has a support structure (2) for installation or mounting in or on a ceiling with an opening (6) defined by a frame of the support structure (2) for the light exit of the downlight, a heat sink (16) held on the support structure (2), at least one LED array thermally connected to the heat sink (16) and mechanically attached to the heat sink (16), and at least one reflector assembly (24, 24 ', 24 ", 24"', 124, 224, 224 ') extending from the LED assembly toward the opening (6) of the support structure, characterized in that the heat sink (16) on the support structure (2) and / or the LED array on the heat sink in at least two different mounting positions can be attached, so that on the heat sink (16) mounted LED array different distances (H H ') with respect to the opening (6) of the support structure (2). Downlight according to Claim 1, in which the reflector assembly (24, 24 ', 24 ", 24"', 124, 224, 224 ') extends over at least the entire distance between the LED array and the opening (6) of the support structure (2). extends. Downlight according to one of the preceding claims, wherein the opening (6) of the support structure (2) and a light exit opening defined by an edge of the reflector assembly (24, 24 ', 24 ", 124, 224, 224') to lie in the same plane. Downlight according to one of the preceding claims, wherein the LED array on a to the opening (6) of the support structure (2) facing surface of the heat sink, preferably removably mounted. Downlight according to claim 4, wherein said surface of the heat sink has one or more positions for mounting the LED array or for mounting a plurality of LED arrays, wherein the plurality of positions preferably have separately controllable, electrical connection means (22) for the LED array. Downlight according to one of the preceding claims, wherein the reflector assembly (24, 24 ', 24 ", 24"', 124, 224, 224 ') has a rotationally symmetrical (25, 25') or an asymmetrical (25 ", 25" ') reflector surface having. Downlight according to one of the preceding claims, wherein the LED array is mounted in a plane directly or indirectly on the heat sink (16), which is inclined relative to a plane which defines the opening (6) of the support structure, in particular between 10 ° and 80 °, preferably between 30 ° and 60 °. Downlight according to one of the preceding claims, wherein the cooling body (16) a plurality of cooling fins (18; 19), wherein some of the cooling fins are compared to the other cooling fins of the heat sink shortened or have recesses to adapt a peripheral shape of the heat sink to the support structure (2) , Downlight according to one of the preceding claims, wherein the maximum diameter of the heat sink (16) in cross-section parallel to a plane defined by the opening (6) of the support structure (2) is smaller than the maximum diameter of the opening (6) of the support structure (2). in said plane. Downlight according to one of the preceding claims, wherein the heat sink (16, 116) is partially surrounded by a jacket (14, 114) having fastening means for fixing the support structure (2). Downlight according to one of the preceding claims, wherein the heat sink (116) by means of an intermediate piece, in particular a cylindrical shell (114), in the support structure (2) is fixed, wherein the heat sink (116) is mounted at different heights in the intermediate element. Downlight according to one of the preceding claims, wherein the reflector assembly comprises a reflector (124) and a reflector retaining ring (130) and / or a plurality of modularly attachable reflectors (224, 224 '). Downlight according to claim 12, wherein the reflector retaining ring (130) is composed of several separate parts, wherein the reflector retaining ring, in particular in the circumferential direction of two or more ring members (132) is joined together. A downlight according to claim 12 or 13, wherein between the reflector support ring (130) or, referring back to claim 11, between a projection of the cylindrical shell and the heat sink (116) is a spacer (150), in particular a variable height spacer, e.g. with removable tabs (152). Downlight system comprising a downlight according to one of the preceding claims, wherein the downlight system further comprises at least two reflector assemblies (24, 24 ', 24 ", 24"'), which generate different light distribution, in particular at least two reflector assemblies with different height and / or with rotationally symmetric and asymmetric reflector.

Images