EP2610541A1 - Ceiling lighting assembly - Google Patents

Abstract

The ceiling light arrangement has a channel (01), and an area lighting element which is attached to outer side of the channel. The area lighting element is provided with a light source surface (26) provided with several LEDs (27). The light source surface of the area lighting element is covered by a diffuser surface (02). The channel is provided with a U-shaped housing having several LEDs (07) arranged on the support (06).

Description

The present invention relates to a ceiling lighting arrangement, which is particularly suitable for lighting residential, commercial and exhibition spaces.

For lighting tasks a wide variety of light sources are available. In order to achieve optimum lighting conditions, considerable efforts are sometimes made, with the type of light source, its positioning in the room and the selected Abstrahlcharakter for the lighting conditions at a certain position within a room to be illuminated are of particular importance. Difficulties arise when the lighting conditions are to be adapted to changing usage situations of a room. Special requirements also arise when one or even several screens are operated in a room to be illuminated, whose image representation can be affected by occurring on the screen surface light reflections that originate from external light sources.

From the DE 10 2010 018 034 A1 For example, a surface radiator is known whose goal is to make the emission of a large-area light source as homogeneous as possible, light emitting diodes being used as light sources which themselves have a comparatively small radiation exit area. The surface light guide proposed for this purpose has a light-guiding region with a coating applied thereto, which purposefully reduces an excessive proportion of radiation at the radiation exit surface. However, this reduces the efficiency of the light source.

In the DE 20 2011 003 828 U1 a luminaire for a ceiling lighting of a tunnel is described. By using lenses in front of the actual light-emitting element, which can be configured as an LED, a targeted radiation of the light is to be ensured. Between the individual cones of adjacent lighting elements nevertheless arise areas with different levels of illumination, so that this arrangement is not very suitable for residential or commercial lighting.

Efforts have also recently been made to combine different functional elements to be provided on storey ceilings. For example, it is known to incorporate both air conditioning elements and fire protection elements in suspended floor slabs.

From the DE 197 38 172 C1 a device for controlling the temperature of buildings is known, in which an integrated into the floor ceiling channel system is provided, which is flowed through by a temperature-controlled fluid. It is also proposed to lay cables or conduits for ceiling lighting in addition in this channel system.

The DE 20 2011 000 426 U1 shows, inter alia, a light channel arrangement with a ceiling element and a recess mounted therein having a U-shaped cross section, in which a light channel is used with a U-shaped housing. The light channel is in this case with its light exit surface substantially in a plane with the surface of the ceiling element and the housing of the light channel can simultaneously perform supporting functions for individual ceiling panels. In this way, a light band can be arranged in the ceiling, which hardly visually from the adjacent ceiling panels is different. Depending on the used reflector in the light channel, a different width radiation angle can be adjusted. However, it always remains the case that the actual light exit surface is limited to the narrow region of the light channel, so that specific lighting situations can not be adequately fulfilled.

In the DE 11 2007 002 136 T5 there is described an LED lamp comprising a U-shaped outer casing, a trapezoidal cross-section reflecting plate disposed within the outer casing, a plurality of LED modules disposed at the bottom portion of the reflection plate, and a light diffusing sheet disposed near the opening of the outer casing. The lighting elements of this LED lamp are all arranged inside the outer housing. A large-area luminous surface can therefore not be provided.

It is an object of the present invention, starting from this prior art, to provide a ceiling lighting arrangement which, while retaining the advantages of known light channels, additionally opens up the possibility of large-area lighting of a room. The aim is also to meet design requirements and in particular to obtain flat, large-scale ceiling areas that are not interrupted by numerous individual lighting fixtures. Another object of the present invention is to design the ceiling lighting arrangement so that it can fulfill further functions, in particular can be used as part of an air conditioning device, so that additional ventilation ducts on the floor ceiling are no longer needed.

These and other objects are achieved by a ceiling lighting arrangement according to the invention, which is designed according to the features of the appended claim 1.

The ceiling lighting arrangement according to the invention comprises at least one channel and at least one area lighting element, which is attached to at least one side of the channel and has a diffuser surface. The area lighting element is arranged outside the channel. Such an arrangement allows for the first time the essential extent of the light-emitting surface and can not be removed from the prior art. An essential advantage of this ceiling lighting arrangement is that conventional illumination means can be provided in the channel and, at the same time, a surface lighting element is available adjacent to the channel, which allows a large-area, uniform illumination of the space. On the other hand, the illumination means to be arranged in the channel can specifically supply smaller areas with a larger amount of light, in order to meet special lighting needs there.

According to a particularly preferred embodiment, the surface lighting element of the ceiling lighting arrangement further has a light source surface with numerous light-emitter diodes (LED), which is covered in the direction of the space to be illuminated by the diffuser surface, which in any case must be interpreted in a transparent manner to that of to transmit light originating from the light source surface. Alternatively or cumulatively, however, the diffuser surface can also be illuminated by other light sources and act as a light distributor.

The channel of the ceiling lighting arrangement also offers the possibility to arrange further functional elements and / or Lay the supply cable without it becoming visible on the ceiling. Finally, it is particularly advantageous if the channel simultaneously assumes supporting functions not only for the adjacent area lighting element but also for other ceiling elements.

In a particularly preferred embodiment, a plurality of ceiling lighting arrangements according to the invention are arranged next to one another or in a grid shape on a floor ceiling, so that the channels form a supporting structure. The individual channels can be attached in a conventional manner to the floor ceiling, for example via hangers or preferably length-adjustable connecting bolts. Between the adjacent channels then the surface lighting elements are clamped so that they are surrounded on all sides by corresponding channels. Optically, this results in a nearly flat floor ceiling, for example in cassette form. The area lighting elements can be easily adapted in their dimensions to the distances between the channels, so that any floor surfaces can be completely covered by the ceiling lighting arrangement according to the invention.

According to a preferred embodiment are in the channel of the ceiling lighting arrangement one or preferably two parallel to each other running carrier with a reflector portion in which numerous juxtaposed LED are positioned. The reflector portion concentrates the light generated by the plurality of LEDs and ejects a light wall at the bottom of the channel, the radiation angle is preferably in the range between 5 ° to 20 °. The light band produced in this way can extend along the entire channel or preferably only in individual sections of the channel.

In a modified embodiment, an air guide section is formed in the channel, which extends along the longitudinal axis of the channel and can be connected to the loading and / or venting means. The channel of the ceiling lighting arrangement is in this way part of an air conditioning device, with targeted air over the air duct section of the channel out and introduced into the illuminated space and / or exhaust air can be sucked in other areas. The air guide portion is preferably formed in the upper region of the channel, for which an intermediate plane is drawn into the channel, which is formed by an intermediate plate mounted in the channel. Throughflow openings are preferably provided in the intermediate plate which allow air to pass from the air guide section in the direction of the open underside of the channel. The flow openings can be formed at predetermined intervals and in each case with an offset from one another along the intermediate plate, whereby the flow conditions in the air guide section and the amount of air emerging from the channel can be influenced.

It is particularly advantageous if the diffuser surface consists of a flexible, cloth or sheet-like material whose side edge is fixed in a tensioning device, which in turn is attached to the channel. By operating the clamping device, the diffuser surface between adjacent channels can be shortened so far that sagging of the cloth or film-like material is minimized, so that the impression of a rigid floor surface area arises. Alternatively, the diffuser surface can be selectively enlarged to produce visible sagging areas between the channels, if desired for design reasons. Of course, the material of the diffuser surface colored be, even if in the non-illuminated state, a certain color on the floor ceiling is desired. In order to generate different lighting moods, colored LEDs can be provided in the light source surface, which is located above the diffuser surface. For this purpose, all principle known driving options of suitable for lighting LED in question.

Fig. 1:

eine Querschnittsansicht eines Abschnitts einer ersten Ausführungsform einer erfindungsgemäßen Decken-Beleuchtungsanordnung;

Fig. 2:

eine Querschnittsansicht eines Abschnitts einer zweiten Ausführungsform der Decken-Beleuchtungsanordnung;

Fig. 3:

eine vereinfachte Detaildarstellung der Decken-Beleuchtungsanordnung mit einem Spannelement;

Fig. 4:

eine vereinfachte perspektivische Ansicht einer abgewandelten Ausführungsform der Decken-Beleuchtungsanordnung;

Fig. 5:

eine Detailansicht von oben einer Zwischenplatte mit Durchströmungsöffnungen;

Fig. 6:

eine schematische Darstellung eines sich im Kanal ausbildenden Luftstroms;

Fig. 7:

eine Querschnittsansicht eines Abschnitts einer weiteren Ausführungsform der Decken-Beleuchtungsanordnung mit veränderter Kanalprofilierung;

Fig. 8:

eine Querschnittsansicht einer nochmals abgewandelten Ausführungsform der Decken-Beleuchtungsanordnung mit einem Linearleuchtmittel;

Fig. 9:

eine perspektivische Ansicht von oben der Ausführungsform gemäß Fig. 8.

Further advantages, details and developments of the present invention will become apparent from the description of preferred embodiments, with reference to the drawings. Show it:

Fig. 1:

a cross-sectional view of a portion of a first embodiment of a ceiling lighting arrangement according to the invention;

Fig. 2:

a cross-sectional view of a portion of a second embodiment of the ceiling lighting arrangement;

3:

a simplified detail of the ceiling lighting arrangement with a clamping element;

4:

a simplified perspective view of a modified embodiment of the ceiling lighting arrangement;

Fig. 5:

a detailed view from above of an intermediate plate with flow openings;

Fig. 6:

a schematic representation of an air stream forming in the channel;

Fig. 7:

a cross-sectional view of a portion of another embodiment of the ceiling lighting arrangement with modified channel profiling;

Fig. 8:

a cross-sectional view of a further modified embodiment of the ceiling lighting arrangement with a linear illuminant;

Fig. 9:

a top perspective view of the embodiment according to Fig. 8 ,

In Fig. 1 a section of a ceiling lighting arrangement according to the invention is shown in a cross-sectional view. An essential part of the ceiling lighting arrangement is a channel 01, which is preferably in the form of a U-shaped housing, which is open at the bottom, is formed. It should be mentioned at this point that the ceiling lighting arrangement is in principle also suitable for attachment to a building wall or the like in a vertical position. The following description and the designation as a ceiling lighting arrangement should not limit the scope of protection in this respect. The channel 01 may advantageously consist of sheet metal or extruded light metal. Such channels are known in principle both from ceiling constructions as well as from specific lighting applications, so that the following description can be limited to the important features here.

At the in Fig. 1 illustrated embodiment extends on both sides adjacent to the channel 01 each have a diffuser surface 02 which extends substantially parallel to the floor ceiling. The diffuser surface 02 is preferably made of a transparent and flexible material with a cloth or film-like appearance. The diffuser surface 02 serves a large-area and uniform illumination of the room. The diffuser surface 02 may interact with different light sources. For example, the arrangement of any light source above the diffuser surface 02 comes into consideration, which are formed by fluorescent tubes or particularly preferably by light emitting diodes (LED). Likewise, an illumination of the diffuser surface 02 from the underside is possible, for example, by radiators built into the floor, whose light beam is reflected by the diffuser surface 02.

The adjacent to the channel 01 side edge of the diffuser surface 02 can be attached to this in various ways. It is conceivable to screw the side edge to the open channel ends or its side walls when the diffuser surface 02 is made of a stable material. As far as the diffuser surface 02 consists of a flexible material, a holding rod 03 is preferably attached to the side edge, which is clamped between the inner wall of the channel 01 and a clamping block 04. The clamping block 04 can be inserted, for example, into a groove 05 provided in the channel 01 in order to lock the holding rod 03. Other mounting options of the diffuser surface 02 on the channel 01 can be selected by the expert.

Within the channel 01 are located at the in Fig. 1 shown embodiment two extending in the longitudinal direction of the channel 01 carrier 06, on each of which a plurality of juxtaposed LED 07 are mounted. The carrier 06 is preferably also used to dissipate the heat loss that occurs during operation of the LED 07. In addition, the carrier 06 a reflector 08, which causes a collimated light emission at the bottom of the channel 01. To protect the LED, the reflector 08 may be closed at the light exit surface by a transparent cover plate 09. Both carriers 06 may be connected to an assembly, preferably via an intermediate plate 11, which may be integrally connected to the rear sides of the two carriers 06. This support assembly is attached, for example by means of screws 12 to profile elements of the channel 01. It may be advantageous if the screws 12 simultaneously serve to fix the clamping blocks 04 within the groove 05. The beam angle of the reflectors 08 is preferably kept small to cast a narrow band of light for the preferred illumination of selected areas, such as a work surface on a desk.

The mentioned intermediate plate 11 separates the upper region of the channel 01 from the lower region, so that in a preferred embodiment the upper region is available as an air guiding section 13. In addition, supply cables 14 may be laid in the upper area of the channel 01 and circuit elements 16 may be positioned for the operation of the LED 07.

A targeted air flow in the air guide section 13 is initially the removal of the resulting heat loss. In addition, in the intermediate plate 11 a plurality of flow openings 17 are located so that an exchange of air with the lower portion of the channel and the adjoining room to be illuminated is possible. For this purpose remains between the parallel supports 06, an open space, but for optical reasons, for example, by a perforated plate can be covered. Between the carrier 06 with its reflector 08 and the free end of the side wall of the channel 01 remains a small gap in the form of a shadow gap, through which the flexible diffuser surface 02 is passed.

At the in Fig. 1 shown embodiment, mounting surfaces 18 are arranged on the outer sides of the side walls of the channel 01. At the mounting surfaces 18 ceiling plates 19 may be attached, which assume different functions. Depending on the method of attachment of the channel 01 to the floor ceiling, the channel can take on self-supporting functions.

In Fig. 2 is again shown in cross section a portion of a second embodiment of the ceiling lighting arrangement according to the invention. At the downwardly directed free ends of the channel 01, the diffuser surface 02 is connected on both sides also in this case. In this case, the open side of the channel 01 receives a radiator assembly 21, which comprises one or more central lighting means 22. The radiator assembly 21 is engaged with resilient side walls 23 in complementary profile elements in the channel 01. Different mounting options are obvious to a person skilled in the art. At the bottom of the radiator assembly 21 numerous flow openings 17 are arranged to allow an exchange of air between the interior of the channel 01 and the environment.

In Fig. 2 It can be seen that on the channel 01, for example, at one of its side walls, an air supply port 24 is arranged to supply or remove air to thereby assist the air conditioning of the illuminated space.

At the in Fig. 2 In the embodiment shown, light source surfaces 26 are mounted in the lower third of the side walls of the channel 01 on both sides, which are part of the surface lighting element, which further comprises the diffuser surface 02. The light source surface is net-like and carries numerous LED 27, which are connected via supply lines with circuit elements 16, which in turn may be disposed within the channel 01. The net-like light source surface 26 preferably extends between adjacent channels 01 and is covered in its entirety by the diffuser surface 02, so that only the evenly light-emitting diffuser surface 02 and the underside of the lamp assembly 21 arranged in the same plane remain visible from the illuminated space.

In Fig. 3 a detail of the ceiling lighting arrangement is shown in a sectional view. In order to tension the diffuser surface 02 between adjacent channels as tightly as possible, it is advantageous if the holding rod 03 attached to the side edge of the diffuser surface 02 cooperates with a clamping element 28 which is mounted on the inside of the channel 01. The lateral end of the diffuser surface 02 is guided for clamping over the free end of the side wall of the channel 01 and pulled by the clamping element 28 in the channel 01. For this purpose, the clamping element 28 and with it the holding rod 03 is variable in height, so that shortens the further retraction of the end portion of the diffuser surface 02 of the free area outside the channel 01.

Furthermore, the shows Fig. 3 a preferred way of attaching the light source surface 26 on the channel 01. For this purpose, wedge-shaped edge pieces 29 are fixed in corresponding recesses, which are also suitable for clamping the light source surface could be. It is advantageous if above the light source surface 26, a protective film 31 is stretched, which can also act as a vapor barrier. On the outsides of the side walls of the channel 01 additional cable guides 30 are attached.

A modified embodiment of the ceiling lighting arrangement is in Fig. 4 shown in a perspective view. The reticular structure of the light source surface 26 and the optically closed, transparent design of the diffuser surface 02 are also clearly recognizable. It is also clearly visible that two parallel light bands are formed on the underside of the channel 01, via which the cover plates 09, which close the reflectors 08 , emitted bundled light.

Likewise, in Fig. 4 be recognized that the intermediate plate 11 has a plurality of flow openings 17, which allow an exchange of air between the air guide portion 13 within the channel 01 and the environment. In addition to the embodiments described so far, a water sprinkler 32 is attached to the intermediate plate 11, which emits extinguishing water in the event of a fire. The water sprinkler 32 is supplied by water pipes, which can be easily installed within the channel 01.

Fig. 5 shows in a simplified perspective view from above the intermediate plate 11 of the channel 01 and the flow openings provided therein 17. In order to achieve optimum flow conditions, the flow openings 17 are spaced from each other and arranged with a lateral offset. In addition, they have an elliptical opening cross-section.

Fig. 6 shows a schematic side view of the formation of an air flow when air is blown into the air guide portion 13 of the channel 01 so that it passes over the intermediate plate 11. It comes to a wave-like air flow, so that the exiting from the bottom of the channel 01 air exiting not in a flat but in waveform. This improves the climatic conditions in the ventilated room, as in particular drafts are avoided.

Fig. 7 shows a modified design of the ceiling lighting arrangement in cross section. The channel 01 serves here only as a support for the diffuser surface 02 and the light source surface 26. The channel therefore has a changed internal profiling, since no bulbs are mounted in its interior. This type of construction is suitable, for example, for use as edge termination if the channel is directly adjacent to a building wall and there is no need for additional line-shaped or punctual lighting. Also in this design, the clamping element 28 is provided, which cooperates with the support rod 03 to tension the diffuser surface 02 over the free end of the channel. The light source surface 26 is in turn attached via the edge piece 29 on the channel. After tensioning the diffuser surface 02, the underside of the channel 01 can be closed by a cover plate 33.

In the Fig. 8 shown embodiment is characterized in that on the downwardly open side of the channel 01 a plurality of special linear illuminants 34 are mounted, which are used as prefabricated units in the channel. The linear lighting means are arranged so that the light exit surface is located approximately centrally in the open bottom of the channel 01. In this case, individual linear illuminants each be attached to the opposite inner sides of the channel, as shown in the Fig. 8 is provided, and in the longitudinal direction of the channel spaced from each other or adjacent to each other.

Fig. 9 shows the embodiment according to Fig. 8 in a perspective view from above. It can be seen that in the longitudinal direction of the channel 01 Luftleitbleche 36 extend, which serve the targeted air flow and thus the formation of certain currents for air conditioning of the room.

LIST OF REFERENCE NUMBERS

01

channel

02

diffuser surface

03

retaining bar

04

chock

05

groove

06

carrier

07

LED

08

reflector

09

cover plate

10

-

11

intermediate plate

12

screw

13

Air guide section

14

electric wire

16

circuit elements

17

Flow openings

18

mounting surfaces

19

cover plates

21

radiator assembly

22

Central light source

23

Springing sidewalls

24

Air supply connection

26

Light source area

27

LED

28

clamping element

29

margin copy

30

cable management

31

protector

32

Sprinkler

33

cover

34

Linear lamps

36

Air baffle

Claims (10)

Ceiling lighting arrangement comprising: ■ at least one channel (01); ■ at least one surface lighting element which is attached to at least one outer side of the channel (01) and has at least one diffuser surface (02). Ceiling lighting arrangement according to claim 1, characterized in that the area lighting element further comprises a light source surface (26) with numerous light-emitter diodes (27), wherein the light source surface (26) in the direction of the space to be illuminated by a transparent diffuser surface (02) covered is. Ceiling lighting arrangement according to claim 1 or 2, characterized in that the channel (01) comprises a U-shaped housing, with an underside open to be illuminated space, wherein in the U-shaped housing a plurality of juxtaposed light emitter diodes (07 ) are arranged on a support (06). Ceiling lighting arrangement according to claim 3, characterized in that the carrier (06) comprises a reflector (08) which focuses the light generated by the light-emitter diodes (07) and a light beam emerging from the underside of the channel (01) generated, with a radiation angle in the range of 5 ° to 20 °, preferably 12 ° to 18 °. Ceiling lighting arrangement according to one of claims 1 to 4, characterized in that the channel (01) comprises a along the longitudinal axis of the channel (01) extending air guide portion (13) which is connectable to loading and / or ventilation means. Ceiling lighting arrangement according to claim 5, characterized in that the air guide section (13) on three sides by portions of the inner wall of the channel (01) and on a fourth side by an elongated, parallel to the top of the channel (01) extending intermediate plate (11) is formed, the numerous flow openings (17) toward the open bottom of the channel (01). Ceiling lighting arrangement according to claim 6, characterized in that in the channel (01) two parallel support (06) with juxtaposed light emitter diodes (07) extend in the longitudinal direction, wherein between the two supports (06) remains a free space, the one Air exchange with the above the support (06) extending air guide section (13) allowed. Ceiling lighting arrangement according to one of claims 1 to 7, characterized in that the diffuser surface (02) consists of a flexible, cloth or film-like material whose at least one side edge by means of a channel (01) fixed clamping element (28) adjustable on the channel (01) is attached. Ceiling lighting arrangement according to one of claims 1 to 8, characterized in that the light source surface (26) has a lattice or net-like structure, is spaced from the diffuser surface (02) and attached with at least one side edge on an outer wall of the channel (01) is. Ceiling lighting arrangement according to one of claims 1 to 9, characterized in that in the channel (01) further areas for the arrangement of electronic circuit units (16) and / or supply cables (14) and / or water sprinklers (32) are provided.

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