DE202009007426U1 - Arrangement for emitting light with luminous elements - Google Patents

Abstract

Arrangement for emitting light (10) with luminous elements, in particular LEDs, and a cooling system (100) thermally coupled to the luminous elements (1), characterized in that the cooling system (100) has an arrangement for space heating and / or for hot water preparation (42), the waste heat of the lighting elements (1) is supplied.

Description

The The present invention relates to an arrangement for emitting light Luminous elements, in particular LEDs, and one coupled to the lighting elements Cooling system.

About the pure generation of visible light, variable light color or over the influence on brightness distribution and radiation properties, takes the arrangement with light elements, straight with LEDs, one steadily increasing importance in the spatial aesthetic design of buildings one. Above are large-scale arrangements used for lighting, including so-called area lights, light tiles, Illuminated ceilings, light walls and light bands belong. In the aforementioned genus of surface lights move for the Observer closely the individual LED light sources. A homogeneous coherent one and areal Light impression in the sense of a light or luminous surface is present.

In Office buildings, rooms, sales halls and Production halls are often required, depending on the volume converted to provide a high light output to the desired brightness to ensure. Especially at merchandise expenses must for illumination partly quite considerable light outputs dimensioned become.

The Operation of an LED light, in the above high light streams be achieved now that significant amounts of heat effectively, fast and reliable are to be paid, to ensure the operation of the luminaires or lamps.

in the Case of LED arrangements for light output, the generated heat can mainly only by heat conduction from the heat source carried away become. Mostly the heat from a heat sink, the thermally with the LED arrangement coupled and which should often be best invisible in the Environment more or less radiated.

one small, flat and compact design is the required spatial oversizing from heat sinks under the consideration of Safety factors often in the way. In addition, it may happen that the heat is distributed only indirectly or uncontrollably in the room.

at LEDs there is a strong temperature dependence of the light output, especially the efficiency in the implementation of the electrical supply energy in light emission in view of the small-scale dimensions still improved can be.

in the Result is problematic, how or where with conventional approaches purposeful the dissipation of heat loss work with large light bands should. However, the above becomes even more difficult when the requirements are met the light intensity or a luminance over a area further increased be dimensioned, the embedded LEDs correspondingly more powerful and to illuminate a whole room evenly bright.

Accordingly, it would be desirable to provide an arrangement such that a light output by low Working temperatures increased and the heat output effectively improved while avoiding the above-mentioned disadvantages can be.

These The object is achieved by an arrangement for emitting light with luminous elements according to the claim 1 and by a method of cooling for use for an arrangement for emitting light with luminous elements according to the claim 12 solved. advantageous Further developments are the subject of the dependent claims.

Accordingly, after A first aspect of an arrangement for emitting light with luminous elements provided, in particular LEDs, and a thermally with at least a lighting element coupled cooling system. The arrangement for Light output and the cooling system are configured such that the waste heat of the lighting elements of a Arrangement for space heating and / or for hot water treatment for disposal stands or is asked.

By doing the cooling system suitably thermally coupled to the LED and, for example an arrangement of channels, Cooling channels or cooling coils passes through the LED arrangement for heat dissipation (considering the design of the luminaire arrangement and the size of the LED used or LED associations), will a reliable one possibility the provision of heat loss for the use allowed in an arrangement for space heating.

Further succeeds reliably, the first rather punctiform, directed and concentrated waste heat of the LED safely and quickly possible derive. When using heat-transferable cooling liquids, including compressible media or liquids, elevated the efficiency of each individual element of the lighting arrangement considerably. The risks a strong temperature drift omitted. The sizing of Cooling succeeds reliable and durable.

Furthermore, the heat dissipation in a conventional manner on the circuit board or board via metallizations and flanged Heatsink done, the liquid channels or pipes have or are thermally connected to corresponding lines of the cooling system and pull through the arrangement to the light output.

The Printed circuit board that carries the LEDs and to accomplish extensive tasks, is from her high thermal responsibility for the arrangement with luminous elements relieved and simplified in their manufacture.

The especially good cooling by circulating cooling media makes it possible to increase the achievable luminous fluxes per unit area considerably, below Maintaining the usual reliability and safety margins. above LED arrangement thus has high availability in every respect and operational capability and can with a great radiant power Cheap and easily made.

Regarding the installation depth of the arrangement for light emission can be flat structural dimensions be reached, where the performance of the arrangement discreet can appear. Furthermore, the compatibility is usual Manufacturing processes of printed circuit board and electronics manufacturing guaranteed.

To The above first aspect of the invention will become more remarkable Way the one generated by the LED unit may be very dissipated high power loss in the thermal spectral range and from other assemblies such as the light exit element or optics kept away, especially if alternative optics with flexible materials are used, the lower temperatures to prefer. High light outputs can be safely provided, transmitted and effectively controlled, e.g. B. dimmed be.

in the Result can be the operation accordingly the arrangement with lighting elements to be improved by the cooling system so that a synergistic effect over several system levels throughout optimizing the overall energy balance entry.

above is the arrangement of the lighting elements in the energy cycle of the building as active ingredient harmonious in an overall system for a pleasant Room climate integrated. So above can also be the case It can be avoided that an air conditioner is against the light elements delivered thermal power dissipation would have to work. Instead, are rectified Interests ahead. This reduces all costs for energy consumption and also for the cooling noticeably. The light source, in particular each individual LED, is well-tempered kept in the optimal working area. The waste heat can be particularly advantageous for space heating, for hot water treatment, for process water or sanitary purposes be used.

To In a second aspect, the present arrangement is for emitting light characterized in that the cooling system at least one heat exchanger or has a pressure exchanger and is designed such that the heat exchanger or Pressure exchanger with a coolant circuit and a hot water cycle is coupled.

First is under the heat exchanger, in a manner known per se, to understand a unity in which two separate circuits are thermally coupled, for example one Arrangement of juxtaposed or coaxial pipes. thermal Energy changes from one circle to the other, in an effort to to form a thermal equilibrium. The heat exchangers can also as two corresponding with each other, interlaced or cohesively abutting one another Be carried out ends of heat sinks in turn, have coolant flowed through cooling channels. The distance between the engaged ends of the heat sink can can be varied, there may be a coolant in between (variant Coupling).

at a pressure exchanger will be pressures of transferring one fluid to another. In the present case, the in the cooling circuit prevailing pressure in the heat cycle transferred become.

To In a third aspect, the arrangement for emitting light according to the second Aspect characterized in that the coolant circuit is a coolant and is configured such that the coolant between at least a device for emitting light and the heat exchanger is movable.

The heat-carrying agent or the cooling liquid is transported by the temperature differences between the source and sink and by gravity in a circle. Water, oil, special liquid or condensed coolants, mixtures or hydrocarbons are typically used as the cooling liquid. However, a gaseous coolant such as CO ₂ can be used or a plasma such as air.

To In a fourth aspect, the light emitting device according to the second embodiment to third aspect, characterized in that the cooling circuit a Pump for the coolant having. The pump thus drives the coolant through the cooling circuit and can over the regulation of the flow rate the degree of cooling at the feed points of the heat loss from the LED array codetermination.

To a fifth Aspect is the arrangement for light emission according to the second to fourth aspects characterized in that the hot water circuit is part of a Heating system with a circulating warm or hot water is, wherein the heating system at least one arrangement for space heating for heat dissipation, in particular a radiator. As part of a heating system It makes sense, the LED arrangement in a heating or cooling system for the Integrate room temperature control and in a conventional manner convectors provide to the heat directed, defined and controlled by the LED elements dissipate and later or elsewhere in the desired To give way.

To In a sixth aspect, the light emitting device according to the second embodiment to fifth Aspect characterized in that the heat exchanger is a hot water flow to remove hot water and a hot water flow is provided. The heat exchanger can do this through multiple circuits or chambers, so that the waste heat of the LED arrangement for hot water treatment or warming up of process water can be used.

To According to a seventh aspect, the light emitting device according to the sixth aspect Aspect characterized in that the heating system or arrangement for space heating in combination with underfloor heating, ceiling heating or an air conditioner is formed. As part of the heating systems, in which the LED array as a heat source can be involved instead of radiators, which typically also be installed under a windowsill, a different kind the heat output or a mixture of different species, depending on the locality Conditions. For example, a radiator may also be in a ground can be realized, are attached to the pipes on cooling fins, the heat leave flat.

To In an eighth aspect, the arrangement for emitting light according to the seventh is Aspect characterized in that the cooling system from a cooling circuit with a coolant and a heat sink, an arrangement for space heating, in particular a radiator or heat exchanger having a surface profiling or cooling fins having.

at The LED array of the present invention is a preferred one Embodiment the thermal coupling of the LEDs with a space heater in the widest Intended. As mentioned above in the first aspect allows the integration of the lighting in the heating and vice versa, completely at first glance different parts of the infrastructure of a building, advantages in the energy distribution.

in the The result is the LED arrangement for light output with light elements able to realize high light output without an associated uncontrollable heating of the building to cause. The LED arrangement becomes even more reliable over a long time Time still maintenance-free and against premature aging and sudden breakdown because of overheating preserved.

following the invention will be explained in more detail with reference to the accompanying drawings. Show it:

1 the view of an inventive arrangement for light output with connected cooling system.

In 1 is an arrangement for light emission 10 with lighting elements, in particular LEDs 1 , shown in accordance with the embodiment of the present invention from the side, with a cooling system 100 is coupled.

In the context of the source circuit as the cooling circuit 30 lie next to the arrangement for light emission 10 , in 1 shown as a surface light or large-scale lighting arrangement, more surface lights 10a and 10b as nearest neighbors.

The arrangements 10 . 10a and 10b Incidentally, the lighting can be a section of a large arrangement for emitting light, for example, a sequential array of dimmable elements that form a luminous ceiling made of LED tiles in a department store.

The arrangements 10 . 10a and 10b are interconnected via connections, for example, via flexible and detachable means such as piping 33 . 33a , and 33b connected, in this case connected in series. The area lights and the connections are part of the cooling circuit 30 ,

In the pipes 33 ff. Is a liquid or gaseous coolant located. The movement of the coolant within the cooling circuit is clear 30 by the arrows on the interconnections of the arrangements 10 . 10a and 10b shown. For orientation in the cooling circuit 30 shows the example of the pipeline 33 the tip of the arrow at the point 34 in the flow direction so downstream. The above point 34 lying arrow end is in relation to the tip or point 34 upstream. The movement of the coolant takes place along the direction of the arrow through the cooling circuit 30 ,

For the temperature of the coolant is assumed simplified, (as well as first the same power losses of the arrangements 10 . 10a and 10b assumed) that the coolant temperature at a point upstream, about at the point 34 , towards a point downstream, about at the point 34b behind the arrangement 10b is lower. Conversely, the coolant downstream has already flowed through more area lights or lighting elements and added more heat loss, the temperature of the coolant downstream is correspondingly higher than upstream.

The area lights can also be supplied via a common feed, so be connected in parallel. In addition, there may also be a mixture or combination of parallel and series connection. The arrangements 10 . 10a and 10b can therefore also be arranged networked. The above may become relevant if, in a modification of one of the above assumptions, there are different area lights, different or different levels of heat loss are generated. For example, if the in 1 left drawn arrangement 10 dissipates a lot of heat loss, the other two area lights 10a . 10b but give little heat loss, either a parallel circuit can be displayed, that is, all arrangements for light output are fed from a supply split, or may be provided, first or upstream, the area lights 10a and 10b with the low heat loss to arrange and then the arrangement 10 to follow.

Furthermore, in the cooling circuit 30 a heat exchanger 20 arranged. The heat exchanger 20 In the present case, it is constructed by a boiler or hot water storage tank shown in simplified form as a cylinder. In the heat exchanger is required for the heat exchange liquid, here to be heated water as a medium, ready to the target circuit or the hot water cycle 40 belongs.

Continue in the cooling circuit 30 runs in or through the heat exchanger 20 a pipe coil 35 , The pipe coil 35 may be a kind of stack of folded or as in an electric coil winding or mechanical spring (both incidentally inductive energy storage) thread-like radially rising tubes with a preferably extended surface by additional fins for the heat exchange. The pipe coil 35 is from the medium of the hot water cycle 40 surrounded, or immersed in the medium.

Finally, for a circulation of the cooling medium in the cooling circuit 30 a device for conveying fluid media, a general pump 32 built-in. The pump 32 can in addition to the pressurization of the cooling medium in the cooling circuit 30 be used for compression in the case of a compressible cooling medium. The pump may also be involved in a pressure exchange (outside the drawing) where it is converted between thermal, mechanical and hydraulic energy.

In the arrangement 10 As a surface light are a plurality of lighting elements 1 , As bulbs may be in addition to the preferred LEDs also a mixture with elongated or circular Gasendladungsröhren, fluorescent tubes or -ringröhren with a filament, tube lamps, light bulbs, headlamp bulbs, halogen bulbs, multi-walled bulbs with built-halogen lamps or bulbs with built-in light emitting diodes in standard versions, the are socketed for a print montage and suitable for thermal coupling. The lighting elements 1 are on a support, for example on a circuit board or circuit board 3 mounted, for example, soldered.

The circuit board 3 In addition to the energy supply, the derivation of the thermal power loss or waste heat of the arrangement for light output takes over. To the waste heat the cooling circuit 30 to feed, are on the circuit board 3 at least one copper pipe or a composite of pipes attached. About the coolant that is in the circuit board 3 thermally coupled pipes is fluidly moved, so in the arrangement 10 extends into and out, the removal of heat is done quickly and reliably.

The arrangement for light emission 10 So is extended according to the present invention on components such as housing, light exit element and luminaire grid or reflector grid, holder for the bulbs addition. To the circuit board 3 with the light elements 1 comes a device for a cooling device, which is in thermal coupling, mechanically releasable connection with the circuit board added.

As a result, there is an arrangement for emitting light 10 In addition to the electrical connections for the power supply also connections for integration into the cooling circuit 30 having an inlet 12 and an outlet 14 for pipes 33 . 33a and 33b for transporting the coolant through the arrangement for emitting light.

The connections 12 and 14 can be equipped with a screw thread and a liquid-tight seal or a coupling with a tap. Above is a simple insertion or removal of the arrangement for light emission 10 from the cooling circuit 30 be possible. When servicing a light-emitting device, it should also be possible to flush the tubes in the array, especially in coils can. The suitable design of the connections with suitable pipe cross-sections ensures reliable serviceability and a long service life of the pipelines, prevents a loss of function of the LED units and avoids considerable costs for new pipe connections or pipes. In many ways, even thin-walled copper pipes, as they are common in heating or air conditioning, can be used and by releasable connections in the cooling circuit 30 be joined together.

In the target circuit or the hot water cycle 40 is an arrangement for space heating 42 intended. As a space heater arrangement is used after 1 a radiator with fins 44 as an an example. The heat exchanger 20 is connected to the radiator via lines in the usual way.

In the hot water cycle 40 is still a pump 46 provided with the help of which the water is circulated and in the hot water circulation 40 circulated. In addition to the pump can in turn, in addition to venting of the lines, be provided a way to clean the lines to avoid that the pipe diameter over time by deposits on the inner walls such as lime or sludge is less.

The heat exchanger 20 , the pipes for the hot water circulation 40 and the radiator form a heating system 50 or are part of a heating system.

alternative can be next to the circuit for the space heating or heating purposes also a run (about one heat exchangers as a countercurrent cooler or a mostly switched off flow heater) for the production and provision of hot water for sanitary purposes be provided.

During operation of the system, the cooling circuit transfers 30 the waste heat from the lighting elements to the hot water circuit 40 through the respective, in both circles 30 and 40 circulating carrier media, wherein the heat exchange via the heat exchanger between the circuits can alternatively be mediated with a variable degree of coupling.

According to the present Invention thus becomes the waste heat from the lighting (area lights, light tiles, Ceilings, strip lights, etc.) a heat exchanger passed to the service or heating water system to this energy to use for hot water and / or for heating purposes. simultaneously gives the advantage of better light output, through better chilled LED light sources. Furthermore can the components sunk into the ceiling, installed in the walls or hidden in the floor become. From the temperatures occurring even offers the application in combination with a floor heating, usually has a low flow temperature. Another advantage is the temporally appropriate attack of heat energy, namely straight when the heating power is most needed during the dark season becomes. Furthermore exist mostly in such buildings already the necessary installations, or will be created anyway, and can So such arrangements for light emission and lights, according to the above Invention for designed a coolant flow are inserted into the existing system particularly favorable.

With The present invention thus becomes a simple, elegant and effective way created a well-tempered area of an LED array, in particular a luminaire with individual LED lighting elements of an LED luminaire too promote, a visually aesthetic Overall appearance for To generate the viewer, the cost of building cooling or heating to reduce and beyond even a contribution for to protect the climate and resources.

Furthermore are the possibilities in the light output of the LED array by the area-like Lighting arrangements are so good even under high luminous flux, that LED units due to the well dimensioned with little effort cooling reserves even at high ambient temperatures and maximum light output operated at optimal temperatures and in their properties in associations can be optimally organized as an array of LED arrays. impressively can just by means of the coolant circuit the LED arrangement also cooled down so far be as the application or the user demands.

Finally lies by the release of heat by radiator for the space heater provides a controlled heat dissipation, which adds to the LED array increased Light output appropriately relieved and after all an optimized building for Creating the best of the whole.

Claims (8)

Arrangement for emitting light ( 10 ) with light elements, in particular LEDs, and a thermally with the light elements ( 1 ) coupled cooling system ( 100 ), characterized in that the cooling system ( 100 ) an arrangement for space heating and / or water heating ( 42 ), the waste heat of the lighting elements ( 1 ) is supplied. Arrangement for emitting light ( 10 ) according to claim 1, characterized in that the cooling at least one heat exchanger ( 20 ) or a pressure exchanger and is designed such that the heat exchanger ( 20 ) or pressure exchanger, a coolant circuit ( 30 ) and a hot water circuit ( 40 ) couples. Arrangement for emitting light ( 10 ) according to claim 2, characterized in that the coolant circuit ( 30 ) comprises a coolant and is configured such that the coolant between at least one arrangement for light emission ( 10 ) and the heat exchanger ( 20 ) is movable. Arrangement for emitting light ( 10 ) Claim 2 or 3, characterized in that the cooling circuit ( 30 ) a pump ( 32 ) for the coolant. Arrangement for emitting light according to one of claims 2 to 4, characterized in that the hot water circuit ( 40 ) a part of a heating system ( 50 ) with a circulating hot water, the heating system ( 50 ) at least one arrangement for space heating ( 42 ) for heat dissipation, in particular a radiator. Arrangement for emitting light ( 10 ) according to one of claims 2 to 4, characterized in that the heat exchanger ( 20 ) has a hot water flow for the removal of hot water and a service water flow is provided. Arrangement for emitting light ( 10 ) according to claim 5, characterized in that the heating system ( 50 ) or arrangement for space heating ( 42 ) in combination with a floor heating, ceiling heating or air conditioning is formed. Arrangement for emitting light ( 10 ) according to claim 7, characterized in that the cooling system ( 100 ) from a cooling circuit ( 30 ) with a coolant and a heat sink, which has an arrangement for space heating ( 42 ), in particular a radiator ( 42 ) or heat exchangers ( 20 ) having a surface profiling or cooling fins ( 44 ) having.