EP3399225B1 - Tunnel luminaire - Google Patents

Description

The invention relates to a tunnel lamp.

Tunnel lights for illuminating tunnel systems are well known. The term tunnel luminaire is understood here to mean an illumination device with at least one lamp (illuminant) and further technical components such as, for example, a luminaire housing, electrical cables, fastening elements, etc.

Such tunnel lights are usually arranged on the tunnel ceiling or on the tunnel walls. To illuminate the single-lane or multi-lane tunnel lane, a plurality of such tunnel lights are preferably provided along the tunnel lane to be illuminated. In particular, in the entrance area or exit area of a tunnel, it is necessary to provide tunnel lights with a high luminous output or lumen output in order to make the transition between daylight and tunnel light and vice versa more pleasant for the driver's eye. Therefore, tunnel entrance lights or tunnel exit lights have a significantly higher light output or lumen output compared to normal tunnel lights.

In the recent past, illuminants formed by a large number of light-emitting diodes or LEDs ("light-emitting diodes") have been used in tunnel luminaires. These are low-maintenance and also have lower energy consumption compared to alternative lamps. From the DE 10 2010 045 297 A1 Tunnel luminaires are already known in which light-emitting diodes or so-called LEDs ("Light Emitting Diodes") are used as illuminants. Provided in the luminaire housing is a multi-part luminaire module which has a plurality of light-emitting diodes and which has at least one strip-like printed circuit board each receiving a row of light-emitting diodes. The circuit board strip accommodating the row of light-emitting diodes is connected to the luminaire housing in a heat-conducting manner via an elongated support body and a holding profile. The elongated carrier part forms an upper heat sink and the at least one holding profile forms a lower heat sink.

If a large number of light-emitting diodes are distributed over a large area, but are arranged densely packed, the power consumption of such an elongated support part is no longer sufficient to ensure adequate cooling of the illuminants. In order to increase the cooling capacity, heat sink profiles which are produced by means of extrusion and which are plate-shaped and are connected to the light-emitting diodes to be cooled in a heat-conducting manner are often used. Such extruded profiles are disadvantageous when used in tunnel luminaires in the field of profiling Cooling purposes are freely accessible from the outside, naturally a high level of contamination, as a result of which the cooling capacity of such heat sink profiles decreases noticeably over time. A constant, permanently sufficient cooling of the light-emitting diodes is no longer ensured, which can also lead to damage to at least some of the light-emitting diodes due to a partially high heat development.

From the US 2012/020094 A1 a tunnel luminaire with a flat luminaire housing is known which has a housing base and a housing cover which enclose a housing interior. Illuminants in the form of LED modules are housed in the housing area. The lower housing part of the luminaire housing, which is designed as a metal profile, comprises a rectangular, flat base section and housing wall sections adjoining its longitudinal sides. Slot-shaped openings are provided in the housing wall sections in order to ensure that heat generated during operation of the LED modules can escape to the outside from the housing interior.

Proceeding from this, it is an object of the invention to provide a tunnel luminaire with improved heat dissipation, which eliminates the problems mentioned and also enables the weight of the tunnel luminaire to be reduced. The object is achieved by a tunnel lamp according to the features of claim 1.

An essential aspect of the tunnel luminaire according to the invention can be seen in the fact that the housing base is formed by a metal profile, formed by bending from a metallic flat material and forming a heat sink, comprising a rectangular, flat base portion and first leg portions adjoining at least two long sides of the base portion, the first Point leg sections away from the housing cover and protrude outwards from the luminaire housing and have several recesses or openings to enlarge the cooling surface. The housing base is thus not only part of the housing, but also forms a heat sink for cooling the light-emitting diodes which are at least partially thermally conductively connected thereto. To increase the cooling capacity, the two first leg sections are provided along the long sides of the rectangular, flat bottom section, which project freely outwards from the underside of the lamp housing and thus form the cooling surface of the metal profile. Furthermore advantageously, the metal profile has a lower weight than the extruded profiles known from the prior art.

Furthermore, the metal profile advantageously has second leg sections, each adjoining a first leg section. By means of the further leg sections, the free ends of which are oriented inwards and towards one another and which are preferably in one plane Extend parallel to the rectangular, flat bottom section, the cooling surface and thus the cooling effect can be further increased.

The metal profile thus advantageously has a U-shaped or C-shaped cross section. The U-shaped or C-shaped cross-sectional profile according to the invention can be produced quickly and easily from a metallic flat material, in particular prepared rectangular metal plates with a material thickness between 3 mm and 15 mm, by appropriate edge bending.

To further enlarge the cooling surface, several recesses or openings are made in the first leg sections. In addition, several recesses or openings can be made in the second leg section to further enlarge the cooling surface. The recesses or openings are preferably produced by stamping. The cooling surface can be increased significantly by introducing recesses or openings of different shape and / or depth and / or size.

The recesses or openings are preferably arranged in one or more rows in the leg sections which are oriented parallel to the longitudinal axis of the tunnel lamp and / or parallel to one another. The cross-sectional shape of a recess or an opening preferably forms a square with a predetermined side length. The inventors have recognized that the greatest possible enlargement of the cooling surface in the region of the leg sections is achieved if the side length of the squares approximately corresponds to the material thickness of the metal profile. In this case, the recesses and openings form cube-shaped holes.

To further increase the cooling effect, the surface of the metal profile is black anodized in one embodiment. In the case of black anodizing of the housing base, a reflective coating or a reflective material layer, which is accommodated between the upper side of the housing base and the light-emitting diode modules, is preferably applied to the upper side receiving the light-emitting diode modules. As a result, the portions of the light radiation generated by the light-emitting diode modules reflected by the glass plate or plastic plate are particularly advantageously reflected, thereby achieving a noticeable improvement in the light yield.

The metal profile is particularly preferably made of aluminum or an aluminum alloy, preferably the aluminum alloy AIMg3.

The luminaire housing is particularly preferably cassette-shaped.

The tunnel lamp is advantageously designed as an entrance lamp or exit lamp or long field lamp.

For the purposes of the invention, the expressions “approximately”, “essentially” or “approximately” mean deviations from the respectively exact value by +/- 10%, preferably by +/- 5% and / or deviations in the form of changes which are insignificant for the function ,

Further developments, advantages and possible uses of the invention also result from the following description of exemplary embodiments and from the figures. All the features described and / or illustrated are individually or in any way Combination basically the subject of the invention, regardless of their summary in the claims or their relationship. The content of the claims is also made part of the description.

Fig. 1

eine perspektivische Ansicht einer erfindungsgemäßen Tunnelleuchte mit geschlossenen Leuchtengehäuse,

Fig. 2

eine perspektivische Ansicht der erfindungsgemäßen Tunnelleuchte gemäß Figur 1 mit geöffneten Leuchtengehäuse,

Fig. 3

eine Draufsicht auf den die Leuchtmittel tragenden Gehäuseboden der erfindungsgemäßen Tunnelleuchte gemäß Figur 2,

Fig. 4

eine stirnseitige Ansicht des Gehäusebodens gemäß Figur 2,

Fig. 5

eine Seitenansicht des Gehäusebodens gemäß Figur 2,

Fig. 6

eine perspektivische Ansicht einer Explosionsdarstellung des Gehäusebodens gemäß Figur 2,

Fig. 7

eine perspektivische Ansicht einer alternativen Ausführungsvariante einer erfindungsgemäßen Tunnelleuchte mit geschlossenen Leuchtengehäuse,

Fig. 8

eine perspektivische Ansicht der erfindungsgemäßen Tunnelleuchte gemäß Figur 7 mit geöffneten Leuchtengehäuse,

Fig. 9

eine perspektivische Draufsicht auf den die Leuchtmittel tragenden Gehäuseboden der erfindungsgemäßen Tunnelleuchte gemäß Figur 7 und

Fig. 10

eine perspektivische Ansicht einer Explosionsdarstellung des erfindungsgemäßen Leuchtengehäuses gemäß Figur 9.

The invention is explained in more detail below with reference to the figures using exemplary embodiments. Show it:

Fig. 1

2 shows a perspective view of a tunnel luminaire according to the invention with a closed luminaire housing,

Fig. 2

a perspective view of the tunnel light according to the invention Figure 1 with open lamp housing,

Fig. 3

a plan view of the housing base carrying the lamps of the tunnel lamp according to the invention Figure 2 .

Fig. 4

an end view of the housing base according Figure 2 .

Fig. 5

a side view of the housing base according Figure 2 .

Fig. 6

a perspective view of an exploded view of the housing base according to Figure 2 .

Fig. 7

2 shows a perspective view of an alternative embodiment variant of a tunnel luminaire according to the invention with a closed luminaire housing,

Fig. 8

a perspective view of the tunnel light according to the invention Figure 7 with open lamp housing,

Fig. 9

a perspective top view of the housing base carrying the lamps of the tunnel lamp according to the invention Figure 7 and

Fig. 10

a perspective view of an exploded view of the lamp housing according to the invention Figure 9 ,

In Figure 1 A perspective illustration of a tunnel luminaire 1 according to the invention is shown as an example, which comprises a preferably flat luminaire housing 2 comprising at least one housing base 3 and one that can be connected to the housing base 3 Has housing cover 4, which in the connected state enclose a housing interior 5 of the lamp housing 2. A multiplicity of light sources in the form of light-emitting diodes LED are accommodated in the housing interior 5, which are connected in a thermally conductive manner at least to the housing base 3.

Such a tunnel lamp 1 is used to illuminate a tunnel and is accordingly attached to the tunnel ceiling or to the side tunnel walls. A plurality of tunnel lights 1 arranged in parallel and / or in series one behind the other can also be provided in a tunnel, which are switched and / or controlled together or in groups via a central control unit (not shown in the figures). The tunnel luminaire 1 according to the invention preferably does not have an integrated ballast, but is connected to an external ballast via a corresponding line connection. In an advantageous embodiment variant, several tunnel lights 1 according to the invention are connected to a central ballast and can be controlled accordingly via this.

The tunnel lamp 1 is also used, for example, as an entrance lamp or exit lamp, which is provided for mounting in the entrance or exit area of a tunnel and has a significantly higher luminous output or lumen output than the other tunnel lamps 1 mounted in the tunnel. In the Figures 1 to 6 For example, a tunnel lamp 1 designed as an entrance or exit lamp is shown. The Figures 7 to 10 show an embodiment variant of a tunnel luminaire 1 designed as a linear luminaire.

A plurality of brackets 2a, 2b, 2c, 2d or holding arrangements 2e, 2f are preferably provided for mounting the lamp housing 2. The brackets 2a, 2b, 2c, 2d are designed, for example, in the form of bracket elements made of a flat metal material. Four brackets 2a, 2b, 2c, 2d are preferably provided for the frontal mounting of the lamp housing 2 on the tunnel ceiling or the tunnel wall. The brackets 2a, 2b, 2c, 2d are only in the Figures 1 and 2 shown and for reasons of clarity in the Figures 3 to 5 omitted. The holding arrangements 2e, 2f are formed, for example, by a multi-part holding structure or suspension structure for hanging mounting of the lamp housing 2 on the tunnel ceiling. Here too, for reasons of clarity, the holding arrangements 2e, 2f are only shown in FIGS Figures 7 and 8th shown and in the Figures 9 and 10 omitted.

The lamp housing 2 is, for example, in the illustrated embodiment according to the Figures 1 to 7 cassette-shaped, the long sides of which extend parallel to a longitudinal axis LA and the broad sides of which extend parallel to a transverse axis QA. Alternatively, the in the Figures 8 to 10 shown tunnel light according to the invention 1 designed as a linear luminaire, which has only narrow broad sides and an approximately beam-like cassette shape.

The housing cover 4 has a rectangular upper side 4.1 and a circumferential edge 4.2 with a low height. The edge 4.2 is composed in each case of two, preferably mutually parallel, opposite wall sections which extend along the longitudinal axis LA or the transverse axis QA and preferably run perpendicularly to a plane which receives the rectangular upper side 4.1. The circumferential edge 4.2 thus comprising four wall sections essentially defines the height of the housing interior 5.

Furthermore, the housing cover 4 has in the rectangular upper side 4.1 at least one preferably rectangular recess 6, which is closed with a transparent material, preferably glass or a transparent plastic material. The right-hand upper side 4.1 surrounds, for example, the rectangular recess 6 in a frame-like manner and has a closed upper-side edge section 4.1 'adjoining it in the direction of the longitudinal axis LA.

According to the invention, the housing base 3 is formed by a metal profile, produced by bending from a flat metal material and forming a heat sink, comprising a rectangular, flat base portion 3.1 and first leg portions 3.2 adjoining at least two long sides of the base portion 3.1. The first leg sections 3.2 of the housing base 3 are preferably flat and rectangular and extend perpendicular to the rectangular, flat base section 3.1. Furthermore, the first leg sections 3.2 point away from the housing cover 4, i.e. protrude from the luminaire housing 2 to the outside. Finally, the mutually opposite first leg sections 3.2 are preferably arranged parallel to one another and have the same width and length.

In a preferred one, in the Figures 1 to 7 The embodiment variant shown is connected to a first leg section 3.2, a second leg section 3.3, which is preferably also flat and rectangular. The second leg sections 3.3 are each arranged perpendicular to the first leg section 3.2. The second leg sections 3.3 thus come to lie in a plane running parallel to the rectangular, flat bottom section 3.1 and point towards one another with their free ends.

A section along the transverse axis QA through the metal profile according to the invention thus results in a C-shaped cross section. If the second leg sections 3.3 are omitted, a U-shaped cross section of the metal profile. The metal profile preferably has a U-shaped or C-shaped cross section and its leg sections 3.2, 3.3 stand from the underside of the housing base 3 Figures 1 to 7 is an example of a metal profile with a C-shaped cross section and in the Figures 8 to 10 shown with a U-shaped cross section.

According to the invention, the leg sections 3.2, 3.3 are produced by bending a metal plate made of a flat metal material on the edge, specifically along bending edges oriented parallel to the longitudinal axis LA.

In a preferred embodiment variant, a plurality of recesses or openings 7 are made in the first and / or second leg sections 3.2, 3.3 in order to enlarge the cooling surface and thus the cooling capacity, preferably by punching. The recesses or openings 7 can have different cross-sectional shapes and / or sizes and / or diameters. In principle, the recesses or openings 7 can have any cross-sectional shape or three-dimensional shape which enables the cooling surface of the metal profile to be enlarged in the region of the first and / or second leg sections 3.2, 3.3 which project downward. The recesses or openings 7 made in the first and / or second leg sections 3.2, 3.3 thus serve to improve heat dissipation to the outside, specifically outside the luminaire housing 2.

In the in the Figures 1 to 7 In the embodiment variant shown, at least in the first leg sections 3.2, a plurality of recesses or openings 7 arranged along one or more rows are provided, the rows extending parallel to the longitudinal axis LA and / or a plurality of parallel rows being provided. Alternatively, the recesses or openings 7 can be distributed in a matrix over the surface of the at least first leg section 3.2. Particularly preferably, the second leg sections 3.3 also have corresponding recesses or openings 7. In the in the Figures 8 to 10 In the embodiment variant shown, a series of recesses or openings 7 is provided for each first leg section 3.2, which extends along the longitudinal axis LA. Particularly preferably, all of the recesses or openings 7 made in at least one leg section 3.2, 3.3 are identical to one another in terms of shape and size.

The recesses or openings 7 particularly preferably have a square cross-sectional shape, the side length of the square recesses or openings 7 being dependent on the material thickness of the metal profile. The side length of the square recesses or openings 7 particularly preferably corresponds to FIG Material thickness of the metal profile. The recesses or openings 7 made in the first and / or second leg sections 3.2, 3.3 are thus cube-shaped in a particularly preferred embodiment. With this configuration of the recesses or breakthroughs 7, the greatest cooling surface gain could be achieved and the cooling capacity could thus be increased further. For example, recesses or openings 7 form a plurality of rows of holes oriented parallel to one another and along the longitudinal axis LA, the individual holes in a row being square and the side length of the square holes corresponding to the material thickness of the metal profile. The housing base 3 is particularly preferably formed by a metal profile made of aluminum or an aluminum alloy by bending. The aluminum alloy AIMg3 is particularly preferably used.

The recesses or breakthroughs 7 or rows of holes are preferably made on the edge before bending the metal plate made of a flat metal material, namely along the long sides thereof by punching, and the metal plate pretreated in this way is then - as described above - bent on the edge to the desired C or Obtain U cross-sectional shape

The lamps in the form of LEDs are preferably mounted on at least one circuit board. In a preferred embodiment, a plurality of light-emitting diodes are arranged, preferably grouped, on a printed circuit board 8.1 and, together with the associated corresponding electrical connection options and, if appropriate, electronic components required for controlling the light-emitting diodes LED, form a so-called light-emitting diode module 8. A light-emitting diode module 8 preferably has at least one each Lens system 8.2, which is preferably designed to generate an asymmetrical radiation of the light radiation generated by the light-emitting diodes LED. For example, a lens system 8.2 can be assigned to four light-emitting diodes LED arranged at a distance from one another on a printed circuit board 8.1, i.e. A plurality of lens systems 8.2 can also be used per LED module 8.

In the variant according to Figures 1 to 7 For example, six light-emitting diode modules 8 are arranged parallel to one another and to the transverse axis QA on the top side 3.1 of the housing base 3, whereas in the embodiment variant according to FIG Figures 8 to 10 For example, three light-emitting diode modules 8 are provided, which are arranged one behind the other along the longitudinal axis LA on the top side 3.1 of the housing base 3.

A plurality of such light-emitting diode modules 8 are preferably interchangeable and thermally conductively connected to the housing base 3, specifically on the first and / or second Leg sections 3.2, 3.3 opposite top of the rectangular, flat bottom section 3.1. The light-emitting diode modules 8 are preferably arranged on the upper side of the rectangular, flat bottom section 3.1 in such a way that the rectangular recess 6 in the housing cover 4 exposes them, ie the section of the upper side 4.1 of the housing cover 4 surrounding the recess 6 surrounds the latter. The light radiation generated by the light-emitting diodes LED can thus pass through the cutout 6 or the transparent material closing it and thus produce the desired lighting effect. Here, the distance between the individual light-emitting diodes LED and a transparent glass plate or a transparent plastic plate, with which the recess 6 is closed, is selected such that an optimal exit of the light rays generated and thus a high light yield is possible.

The supply voltage and / or control signals are supplied to the light-emitting diode modules 8 via a central connection unit 9, which is preferably provided in the area of the surface edge section 4.1 '. The central connection unit 9 is preferably designed as one or more plug-in connection units. In order to protect this central connection unit 9, in the case of a rectangular luminaire housing 2 with narrow longitudinal or end faces, an outwardly projecting connection housing section 10 is provided on the upper side 4.1 of the housing cover 4. In an alternative embodiment variant, the connection housing section 10 can also be arranged on the end face or length side in the case of a rectangular luminaire housing 2 with correspondingly wide longitudinal or end faces, i.e. be formed flush with the respective longitudinal or end face or be received in this. The connection housing section 10 has, for example, a cable screw connection 10.1 and a pressure compensation system 10.2.

The light-emitting diode modules 8 shown in the exemplary embodiments have, for example, thirty-two light-emitting diodes LED per module, a lens system 8.2 being assigned to four light-emitting diodes LED grouped with one another, i.e. a corresponding light-emitting diode module 8 thus comprises eight lens systems 8.2, which are particularly preferably arranged in series with one another on the rectangular supply board 8.1. It goes without saying that the number of light-emitting diodes LED per group and / or module and the number of modules per se can be chosen arbitrarily in order to achieve a desired light output or lumen output. So-called "high-power" light-emitting diodes LED with high light output are preferably used.

Furthermore, the preferably hood-like housing cover 4 is provided with a circumferential seal, which seals the housing base 3 and the Seals housing cover 4 enclosed housing interior 5 to the outside, so that an at least splash-proof luminaire housing 2 is formed.

In one embodiment variant, the surface of the metal profile is black anodized in order to achieve a further increase in the cooling capacity. In the case of black anodizing of the housing base 3, a reflective coating or a reflective material layer is preferably applied to the top side or the rectangular, flat base portion 3.1 receiving the light-emitting diode modules 8, which is accommodated between the base portion 3.1 of the housing base 3 and the light-emitting diode modules. As a result, the portions of the light radiation generated by the light-emitting diode modules 8 reflected by the glass plate or plastic plate into the housing interior 5 are particularly advantageously reflected back to the glass plate or plastic plate, thereby achieving a noticeable improvement in the luminous efficacy of the tunnel lamp 1.

The housing base 3 is preferably detachably connected to the housing cover 4, for example by means of suitable screw connections.

The invention has been described above using exemplary embodiments. It goes without saying that numerous changes and modifications are possible without departing from the inventive idea on which the invention is based.

LIST OF REFERENCE NUMBERS

1

tunnel luminaire

2

luminaire housing

2a, 2b, 2c, 2d

brackets

2e, 2f

support structures

3

caseback

3.1

rectangular, flat bottom section

3.2

first leg sections

3.3

second leg sections

4

housing cover

4.1

top

4.1 '

Surface edge section

4.2

surrounding border

5

Housing interior

6

recess

7

Recesses or breakthroughs

8th

light emitting diode module

8.1

printed circuit board

8.2

lens system

9

central connection unit

10

Connection housing section

10.1

Cable gland

10.2

Pressure equalization system

LA

longitudinal axis

LED

LEDs

QA

transverse axis

Claims (11)

1. Tunnel luminaire (1) consisting of a preferably flat luminaire housing (2) with a housing bottom (3) and a housing cover (4) that can be connected with the housing bottom (3), which bottom and cover jointly enclose a housing interior (5), wherein a plurality of lighting means in the form of light-emitting diodes (13) are received in the housing interior (5), wherein the lighting means are connected with at least the housing bottom (3) in a thermally conductive manner, wherein the housing bottom (3) is formed by a metal profile manufactured by bending a metallic flat material, forming a heat sink and comprising a rectangular, planar bottom section (3.1) and first side sections (3.2) joined to at least two longitudinal sides of the bottom section (3.1), wherein the first side sections (3.2) point away from the housing cover (4) and protrude outwardly from the luminaire housing (2) and comprise a plurality of recesses or openings (7) for enlarging the cooling surface.
2. Tunnel luminaire (1) according to claim 1, characterized in that the metal profile comprises second side sections (3.3), each joined to one respective first side section (3.2).
3. Tunnel luminaire (1) according to claim 1 or 2, characterized in that the metal profile has a U-shaped or C-shaped cross section.
4. Tunnel luminaire (1) according to claim 2, characterized in that the second side sections (3.3) comprise a plurality of recesses or openings (7) for enlarging the cooling surface.
5. Tunnel luminaire (1) according to claim 1 or 4, characterized in that the recesses or openings (7) in the side sections (2.3, 3.3) are created by punching.
6. Tunnel luminaire (1) according to any one of claims 1 to 5, characterized in that the recesses or openings (7) are arranged in one row or a plurality of rows in the side sections (3.2, 3.3), which are oriented parallel to the longitudinal axis (LA) of the tunnel luminaire (1) and/or parallel to each other.
7. Tunnel luminaire (1) according to any one of claims 1 to 6, characterized in that the cross-sectional shape of a recess or an opening (7) forms a square with a side length, wherein the side length approximately corresponds to the material thickness of the metal profile.
8. Tunnel luminaire (1) according to any one of the preceding claims, characterized in that the metal profile is manufactured from aluminium or from an aluminium alloy, preferably the aluminium alloy AIMg3.
9. Tunnel luminaire (1) according to any one of the preceding claims, characterized in that the surface of the metal profile is anodized black.
10. Tunnel luminaire (1) according to any one of the preceding claims, characterized in that the luminaire housing (2) has a cassette-type design.
11. Tunnel luminaire (1) according to any one of the preceding claims, characterized in that the tunnel luminaire (1) is designed as an entrance/exit luminaire or as a linear luminaire.

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