DE102010054943A1 - Lighting system for motor car, has lamp which is provided with light source, and air suction apparatus is provided with air inlet opening, fan and air outlet aperture - Google Patents

Abstract

The lighting system has a lamp (3a) which is provided with a light source (14a). An air suction apparatus is provided with an air inlet opening (5), a fan (8) and an air outlet aperture. A central controller (9) in communication with the temperature sensor (7), controls all the lights and the blower. An independent claim is included for method for cooling lighting system.

Description

I. Field of application

The invention relates to a lighting system, which usually consists of several individual lights, as it is positioned for example in the automotive industry with high light output over a motor vehicle to z. B. to investigate its form or color in detail, or to simulate strong sunlight and thereby undergo conditioned aging processes.

II. Technical background

• – Zum einen steigt die Wärme von der Beleuchtungsanlage auf zu der meist in relativ geringem Abstand darüber befindlichen Gebäudedecke. Dort können Elemente verbaut sein, die eine zu starke Aufheizung nicht überstehen und geschädigt würden.
• – In einer solchen Anlage wird das eingestellte KFZ häufig auch schnellen Temperaturzyklen unterworfen, also z. B. von einer hohen Raumtemperatur auf eine weit unter dem Gefrierpunkt liegende Raumtemperatur abgekühlt. Hierfür sind ohnehin sehr starke Klimaaggregate notwendig.

Due to the light intensity of such lighting systems, a strong heating of the individual light sources takes place in all receiving lights and thus also the lights and thus overall the lighting system, which can have disadvantages in many cases:

• - On the one hand, the heat from the lighting system rises to the building ceiling, which is usually located at a relatively small distance above it. There may be installed elements that would not survive too high heating and would be damaged.
• - In such a system, the set car is often subjected to rapid temperature cycles, so z. B. cooled from a high room temperature to a temperature far below freezing room temperature. For this purpose, very strong air conditioning units are necessary anyway.

• – Ein weiteres Problem stellen bei Verwendung von Metalldampflampen, meist Quecksilberdampflampen, die bei einem Platzen des Leuchtmittels austretenden z. B. Quecksilberdämpfe dar, die gesundheitsschädlich sind. Da die Verdampfungstemperatur von Quecksilber bei ca. 600° liegt, Teile der Leuchte jedoch weitaus heißer während des Betriebes sind, wird sich das dampfförmige Quecksilber nach dem Platzen der Lampe zwar mit der Zeit an kühleren, unter 600°C warmen, Bauteilen ablagern.

However, if only by the simultaneous or previously occurring lighting electrical services of z. B. 30 kW are also introduced through the lighting system in the room, the air conditioner must additionally dissipate this, which may require a larger-sized air conditioning in this room at given temperature cycles.

• - Another problem when using metal halide lamps, usually mercury vapor lamps, the exiting at a burst of the illuminant z. B. mercury vapors, which are harmful to health. Since the vaporization temperature of mercury is about 600 °, but parts of the lamp are much hotter during operation, the mercury vapor after the lamp has burst, but over time to cool down, at 600 ° C, components deposit.

However, since this does not happen suddenly, there is a risk that people working on the system inhale these uncondensed vapors.

III. Presentation of the invention

a) Technical task

It is therefore the object of the invention to provide an apparatus and a method which avoids the disadvantages described.

b) Solution of the task

This object is solved by the features of claims 1 and 13. Advantageous embodiments will be apparent from the dependent claims.

The lighting system is cooled by the procedure that air is sucked in from the environment of the lighting system, is guided along the heat-generating parts of the lighting system, whereby the hot parts of the lighting system give their heat largely to this cooling air, which is thereby greatly heated. However, this cooling air does not remain in the lighting system, but is constantly dissipated, so that it has no time to heat beyond a predetermined limit temperature.

To control this, the temperature of the air or a component of the lighting system is preferably constantly monitored by means of a temperature sensor at a predetermined location of the lighting system or multiple locations and by means of a controller which is coupled to all lights and the at least one temperature sensor, either by the air flow rate of the blower is increased or the lights of the lighting system are partially or completely switched off.

The cooling air can either individually between each of an inner housing, are arranged in the light source and reflector, and a surrounding this outer housing, or through the module housing a lamp module in which a plurality of lights are arranged.

Accordingly, each lighting system comprising at least one luminaire with a light source comprises an air extraction device with at least one air inlet opening, a blower or at least one air outlet opening in the lighting system in order to be able to guide the cooling air through the lighting system by means of the blower.

Similarly, the already mentioned temperature sensor for temperature control of critical areas of the lighting system is highly recommended as well as the central controller that controls the fan and / or the light sources, depending on the signals received from the temperature sensor.

For individually cooled luminaires, each individual luminaire communicates with the air extraction device directly by means of the air ducts of the air exhaust device and accordingly has at least one air inlet opening and one air outlet opening and preferably also at least one blower per luminaire.

In a preferred embodiment, each luminaire has, in addition to the inner housing in which the light source and usually also a reflector is arranged, an outer housing which surrounds its rear side and the majority of its sidewalls at a distance from the inner housing. The cooling air is passed between the inner housing and the outer housing.

Accordingly, the at least one air outlet opening is arranged in the outer housing, preferably in the upper region of its side walls. As the air inlet opening is preferably a distance between the open front of the outer housing and the inner housing sitting therein, which must preferably be an annular circumferential, not necessarily the same width everywhere, distance.

In addition, the cooling air can also be passed through the inner housing itself, from where the heated air, for. B. by a grid on the after. directed above the rear wall of the inner housing, can enter into the space between the inner housing and the outer housing and thus the interior of the inner housing is subjected to the suction of the blower. The air supply into the inner housing can take place via a distance between the reflector and the front side of the inner housing or via special passages in the outer walls of the inner housing, preferably in its lower region and thus close to the light source.

In lighting systems, the lights are often arranged in rows and several such rows of lights next to each other.

For the air duct, an exhaust air duct is routed along each row of luminaires, which can also be arranged between two rows of luminaires and then vented both rows of luminaires.

Each of the luminaires of such a luminaire row is connected in each case via a supply channel with the exhaust air duct as an air guide. In addition to the blower in each individual luminaire, the exhaust duct - downstream of the last connected luminaire - is also equipped with its own exhaust fan and a filter designed to filter out particularly harmful substances such as mercury.

As can heat up because of the leadership of the hot air and the exhaust duct and the supply channels and in turn heat to the environment, especially up to the ceiling, submit this exhaust duct and / or the supply channels at least on the top, better also on the Side surfaces and best equipped over the entire cross-section with a temperature insulation.

In this case, the central exhaust duct usually consists of a dimensionally stable material such as sheet metal or a metal profile, while the supply channels, which indeed have only a small length, usually made of a flexible material, such as an aluminum tube exist.

Also, the outer casing of each luminaire can be equipped with such a temperature insulation at least over part of its surface, in particular its rear side facing upwards.

In the second embodiment, an entire luminaire module is to be cooled instead of the individual luminaire. For this purpose, the lighting module, in which the lights are usually mounted in rows in the longitudinal and transverse directions on a support frame, in particular suspended, be equipped with a module housing in which all lights are located and which essentially has a closed interior through which the Cooling air is guided:
Accordingly, not only one, but a plurality of air outlet openings are usually present in the side walls of the module housing, in particular their upper area.

The top of the module housing consists of an either temperature-insulated plate or two spaced plates with air gap.

As air inlet openings in the module housing are either the spaces between the individual lights, if the downward front of the module housing has no other occlusive elements such as a front panel.

If such a front panel is present, this is usually not contacting approaching to the individual lights but ends at a distance in front of the lights, so that these distances can serve as air inlet openings.

In addition or instead of this distance can in the front panel too. Passage openings, In particular, a large number of passage openings, be arranged, so that preferably a perforated plate is used as a front plate, which thus causes only an optical separation of the interior of the module housing, but does not represent a fluidic seal at the inlet for the cooling air.

Also in this solution, a part of the air flow can be passed through the interior of the inner casing of the lamp, as described above and for the same purpose.

In a two-ply back plate of the module housing whose space can also be connected via a separate inlet channel, which opens in the front of the module housing, with the environment and thus relatively cool air and not already much warmer air from the interior of the module housing, and suck on a Outlet with the outlet opening of the module housing are in communication and thus also be subject to the suction effect of the fan, which yes is preferably present in the outlet opening of the module housing and usually in each of the outlet openings.

Such a lighting module may be suspended from a ceiling, but it is preferably by stand legs stand on the ground and when these legs have rollers at the bottom, are also moved along the ground.

Such luminaire modules can be available with the same or different number of luminaires, preferably in a direction of different numbers of luminaires. Thus, the luminaire modules can for example always have the same dimension in the transverse direction and differ only in their length in the longitudinal direction, so that from a small number of modules very different overall lengths of a composite system can be produced.

In addition, the luminaire modules can also be adjusted in height above the ground by their legs can be adjusted in length, in particular can be adjusted by motor and synchronously for all legs of a luminaire module by means of the controller.

These luminaire modules are also preferably equipped with one or more temperature sensors at critical points, in particular on the upper side of the back plate of the module housing, and connected to a controller which pursues the same connections and purposes as described above.

c) embodiments

Embodiments according to the invention are described in more detail below by way of example. Show it:

1 A first embodiment of the invention in the supervision,

2a the first embodiment of the invention in side view,

2 B : a detail enlargement 2a .

3a FIG. 2 shows a perspective view of a second embodiment of the invention, FIG.

3b : the second embodiment of the invention in side view,

4a : the design of the 3a in the supervision and

4b : the design according to 3b in the same direction with the side wall removed.

The 1 such as 2a , b show a first embodiment of the invention, in which the lighting system 1a - as best in 2a visible - on the ceiling 31 is attached and the lights 3a , b stand alone in the room, so not from a total housing around the lighting system 1a are surrounded around.

The lights 3a , b are in the longitudinal direction 10 arranged one behind the other in a row and at one in this longitudinal direction 10 arranged above supporting profile 30 fixed, which by means of spacers in the desired height below the ceiling 31 are suspended in the area of the lighting system 1a may have an additional temperature insulation.

The lights 3a , b are each individually cooled by - as best in the detail magnification of 2 B visible - the inner housing 13 in which the light source 14a and possibly the reflector 15 sits, in turn, in an outer casing 12 is accommodated, which surrounds the inner housing, at least on the back and over a large part of the side walls.

The inner case 13 is above the front surface - as the front surface of the lamp is always the side designated, from which the light of the lamp is primarily to emerge - something before, which is not absolutely necessary for the invention.

Through a passage, especially the distance 16 as an air passage opening 5 between the front, open side of the outer housing 12 and the inner housing therein 13 which is preferably a circumferential distance 16 is like in the 1 and 2a shown (even if it does not have the same size on all sides) air flows from the environment, so in this case in the down-shining lights 3a , b primarily from below, from the room below the lighting system 1a in the gap 33 between inner housing 13 and outer casing 12 and thus cools the inner housing 13 before putting the outer case 12 over the air outlet 6 the feed channel 19a , b in the exhaust duct 18 leaves inside.

As 1 shows, the exhaust duct runs 18 between two in the transverse direction 11 spaced rows 4a , b of lights 3a , b in the longitudinal direction 10 , and every single light 3a , b of both rows 4a , b is via a feed channel 19a , b with this working as the main channel exhaust duct 18 connected.

Although in the outer case 12 every light 3a , b own blower 8th is arranged to remove the air from the gap 33 out, is preferably in each of the exhaust ducts 18 in addition another blower 8th' arranged, preferably in the flow direction of the air after the last connected lamp 3a , b. Also a filter 20 is in the exhaust duct 18 before its outlet end present for filtering out especially harmful substances such as dust or mercury from burst light sources 14a , b in the form of mercury vapor lamps.

To improve the cooling and, for example, mercury vapor from burst light sources 14a , B is also able to dissipate, is the inner housing 13 itself not completely closed:
For one thing, between the front of the inner housing 13 and the reflector received therein 15 a distance exist, through the air into the interior of the inner housing 13 can get. So that they the inner case 13 can also leave again, are preferably in the upward-facing rear side of the inner housing 13 passages 17 present, so that also the interior of the inner casing 13 the suction of the blower 8th subject.

Such passages 17 , preferably in the form of oblong holes, can also in the side walls of the inner housing 13 be present, preferably near the open bottom of the inner housing 13 and close to the light source 14a , b.

Since hot air rises due to gravity, there is a particular case of the upwardly facing backs of the outer housing 12 and the exhaust duct 18 the danger that these heat up and undesirably radiate heat upwards towards the building ceiling.

That's why - as best in 2 B visible - the upward facing back of the outer housing 12 with a temperature insulation 32 provided and at least the top and side walls of the exhaust ducts 18 with insulation 22 ,

The 3a , Federation 4a , b show a second embodiment of the invention in the form of a lamp module 23 , which in this case is not hung on the ceiling of a room, but on legs 28 on its outer edges, in this case its four outer corners, stands on the ground and can also be moved along the ground with the help of rollers 29 at the lower ends of the legs 28 ,

In the luminaire module 23 are the individual lights 3a , b in the longitudinal direction 10 and transverse direction 11 extending rows arranged and also extending in these directions struts of a support frame 2 suspended.

Also on the support frame 2 , preferably on the outside along the lamp module 23 extending outer struts, is a module housing 24 fixed, which at least from side walls and an upward back plate 27 that exists in 3a is displayed in the off-hook state to be able to see inside.

The module housing is facing downwards on the front 24 a front panel 25 on, the recesses for the lights projecting from it 3a , b and - as best in 4b visible - around the lights 3a , B preferably run around at least on two opposite sides, preferably circumferentially, a distance 16 ' leaves free as the air inlet opening 5 ' serves. Instead, or in addition, also in the front panel 25 even a multitude of passage openings 26 be present, which also serves as air intake openings 5 ' serve, for example by the front panel 25 is designed as a perforated plate.

In the side walls, preferably two opposite side walls of the module housing 24 are each two air vents 6 ' arranged with fans 8th , over which the cooling air over the air inlet openings 5 ' in the interior 35 of the module housing 24 sucked in and along the inner casing 13 the lights 3a , b again out of the module housing 24 is dissipated.

How best that 4a shows are the lights 3a , b in terms of their inner casing 13 - An outer housing is not necessary here - not formed closed, but they have at least on their upwardly facing rear passage openings, preferably a grid 34 to the inside of the inner casing 13 to let rising heat escape upwards into the interior 35 of the module housing 24 ,

The air inlet into the inner housing 13 takes place via the non-dense, but spaced arrangement of the reflector 15 in the front of the inner housing 13 and / or + via air inlet openings in the lower region of the side walls of the inner housing 13 ,

A temperature sensor 7 , which is coupled to a controller, monitors the temperature of the lighting system 1a , b at a critical point:
In 2 B this is on the top of the outlet housing 12 , in 3b on the top of the back plate 27 ,

If the temperature is too high, the controller will switch 9 some or all lights 3a , b off.

LIST OF REFERENCE NUMBERS

1a, b

lighting system

2

supporting frame

3a, b

lamp

4a, b

Lights series

5 '', 5 ', 5

Air inlet opening

6, 6 '

air outlet

7

sensor

8, 8 '

fan

9

control

10

longitudinal direction

11

transversely

12

outer casing

13

inner housing

14a, b

light source

15

reflector

16, 16 '

distance

17

passages

18

exhaust duct

19a, b

supply channel

20

filter

21

exhaust fan

22

insulation

23

lamp module

24

module housing

25

front panel

26

Port

27

backplate

28

foothold

29

role

30

support section

31

Space Decjke

32

thermal insulation

33

gap

34

grid

35

inner space

Claims (18)

Lighting system ( 1a , b) with at least one lamp ( 3a ) with a light source ( 14a ), characterized by an air suction device with - at least one air inlet opening ( 5 ), - at least one fan ( 8th ) and - at least one air outlet opening ( 6 ) in the lighting system ( 1a , b). Lighting system ( 1a , b) according to claim 1, characterized in that the lighting system ( 1a , b) at least one temperature sensor ( 7 ), in particular with a central control ( 9 ) of the lighting system ( 1a , b) communicating all the lamps ( 3a , b) as well as the blower ( 8th ) controls. (individually cooled lights) Lighting system ( 1a ) according to one of the preceding claims, characterized in that each individual lamp ( 3a , b) is in direct communication with the air exhaust device and an air inlet ( 5 ) and an air outlet opening ( 6 ' ) and in particular a blower ( 8th ). Lighting installation according to one of the preceding claims, characterized in that - the luminaire ( 3a ), in particular each lamp ( 3a , b) an inner housing ( 13 ), in which the light source ( 14a ) and optionally a reflector ( 15 ) is arranged and the inner housing ( 13 ) in an outer housing ( 12 ) is arranged, in which the air outlet opening ( 6 ) for the connection with the air suction device as well as the blower ( 8th ), and in particular - on the front side, from which the light of the light source ( 14a ) primarily exits, a distance ( 16 ), in particular a circumferential distance ( 16 ), between outer housing ( 12 ) and inner housing ( 13 ) present as an air inlet opening ( 5 ) of the luminaire ( 3a ) and that in particular the inner housing ( 13 ) from the front of the outer housing ( 12 ), which is in particular open, projects, and / or - the inner housing ( 13 ), in particular close to the light source ( 14a ), Passages ( 17 ) and / or between the reflector ( 15 ) and the surrounding inner casing ( 13 ) There is a distance which also serves as an air inlet opening. Lighting system ( 1a ) according to one of the preceding claims, characterized in that the luminaires ( 3a , b) in luminaire rows ( 4a , b) are arranged and along each row of light ( 4a , b) an exhaust duct ( 18 ), with which each outer housing ( 12 ) via a supply channel ( 19a , b) in Connection and each exhaust duct ( 18 ), in particular a built-in filter ( 20 ) and an exhaust fan ( 21 ) having. Lighting installation according to one of the preceding claims, characterized in that - the exhaust duct ( 18 ), in particular the supply channels ( 19a , b), at least on the top and the side surfaces of a temperature insulation ( 22 ), and / or - the exhaust duct ( 18 ) consists of a dimensionally stable material, in particular sheet metal or a metal profile, and / or the supply channels ( 19a , b) consist of a flexible material, in particular a flexible hose, and / or - between two parallel rows of lights ( 4a , b) one exhaust duct each ( 18 ), with which the lights ( 3a , b) both rows of lights ( 4a , b) via feed channels ( 19a , b) are in communication, and / or - the outer housing ( 12 ) at least over a part of its surface, in particular at its upwardly directed rear, a thermal insulation ( 32 ) having. (refrigerated whole system) Lighting system ( 1a , b) according to one of the preceding claims, characterized in that the lighting system ( 1b ) from at least one luminaire module ( 23 ), which - several lights ( 3a , b), - a supporting frame ( 2 ) to which the luminaires ( 3a , b) are attached, and - a module housing ( 24 ), which the support frame ( 2 ) and the lights ( 3a , b) at least on the back and the side surfaces closes, and in particular - the air outlet opening ( 6 ) in the module housing ( 24 ), in particular its side wall, is arranged. Lighting system ( 1b ) according to one of the preceding claims, characterized in that - the lamps ( 3a ) only one inner housing ( 13 ), which the light source ( 14a ) and possibly the reflector ( 15 ), and / or - the front surface of the module housing ( 24 ) between the protruding front surfaces of the lamps ( 3a , b) is either completely open or from a front panel ( 25 ) with passage openings as air inlet openings ( 5 ' ) is covered, in particular in the form of a perforated plate. Lighting system ( 1b ) according to one of the preceding claims, characterized in that - the front panel ( 25 ) around the lights ( 3a , b) around a distance ( 16 ' ), which is in particular greater than the diameter of the passage openings ( 26 ) in the front panel, and / or - in two opposite side surfaces of the module housing ( 24 )) at least one each, more preferably a plurality of air outlet openings ( 6 ) are arranged. Lighting system ( 1b ) according to one of the preceding claims, characterized in that the back plate ( 27 ) of the module housing ( 24 ) bilayered and the air space therebetween - either substantially air-tightly isolated from the environment, - or via a separate supply air duct, which is open to the front of the module housing, as the air inlet in communication and with the air outlet ( 6 ) of the module housing communicates as an air outlet. Lighting system ( 1b ) according to one of the preceding claims, characterized in that - the luminaire module ( 23 ) at the upper end of upright legs ( 28 ), which in particular at its lower end rollers ( 29 ) for the method of the luminaire module, and in particular - the legs ( 28 ) are variable in their length and adjustable, in particular telescopic, and in particular motor-driven by means of the controller ( 9 ) are synchronously telescopic. Lighting system ( 1b ) according to one of the preceding claims, characterized in that - the lighting system ( 1b ) several luminaire modules ( 23 ), and / or - the lights ( 3a , b) within a luminaire module ( 23 ) longitudinal ( 10 ) and transverse direction ( 11 ) are arranged in rows, and the lighting modules ( 23a , (b) concerning the number of lamps ( 3a , b) in the longitudinal direction ( 10 ) or in the transverse direction ( 11 ) but coincide in one direction but in number and dimension. Method for cooling a lighting system ( 1a , b) by means of air, characterized in that - air from the surroundings of the lighting installation ( 1a , b) by at least one air inlet opening ( 5 ), - along the heat-generating parts of the lighting system ( 1a , b) is guided, and - by an air outlet opening ( 6 ) from the lighting system ( 1a , b) is discharged, and in particular - when a predetermined temperature is exceeded at a predetermined position of Lighting system ( 1a , b) a controller ( 9 ), with all the lights ( 3a , b) and a temperature sensor ( 7 ) at this point, either the performance of the cooling air-conveying blower ( 8th ) and / or the lights ( 3a , b) the lighting system ( 1a , b) switches off completely or partially. (individually cooled light) Method according to one of the preceding claims, characterized in that - the cooling air via an air inlet opening ( 5 ) between an inner housing ( 13 ), which the light source ( 14a , b) and optionally the reflector ( 15 ) and a spaced apart outer housing ( 12 ) and via an air outlet ( 6 ) in the outer housing ( 12 ), and / or - a portion of the cooling air through passages ( 17 ) in the inner housing ( 13 ) into and out of this. Method according to one of the preceding claims, characterized in that - the upwardly directed part of the outer housing ( 12 ), in particular its rear side, is thermally insulated, and / or - in the case of lamps arranged in series ( 3a , b) the air from the individual outer casings ( 12 ) an exhaust duct running along the row ( 18 ), in particular even an exhaust fan ( 21 ) and a filter ( 20 ) in front of the outlet to the environment. (refrigerated whole system) Method according to one of the preceding claims, characterized in that the at least one air inlet opening ( 5 ) and the at least one air outlet opening ( 6 ) in a module housing ( 24 ) of a luminaire module ( 23 ), in which several lamps ( 3a , b) are arranged. Method according to one of the preceding claims, characterized in that the at least one air inlet opening ( 5 ) at a distance of the individual lights ( 3a , b) to the surrounding, common front panel ( 25 ) of the luminaire module ( 23 ) and / or in passage openings ( 26 ) of the front panel ( 25 ). Method according to one of the preceding claims, characterized in that the at least one air outlet opening ( 6 ) in the side wall of the module housing ( 24 ) is arranged.

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