EP3708907B1 - Modular wall and shelf washer - Google Patents

Description

The present invention relates to a lighting system which is specially designed to illuminate shelves and possibly adjacent walls in shops. Such lights are also referred to as shelf or wall washers.

For the targeted illumination of shelves and walls, in the prior art linear lights are used, which are either unshielded or have lighting technology. For example, the lights can be mounted in the form of gondolas between the shelves on the ceiling. However, the luminaires sometimes create strong glare for customers, especially if the luminaires are also used to illuminate the space between the shelves. Furthermore, the linear luminaires often have massive heat sinks that impair the appearance of the luminaire.

EP 3 364 102 A1 discloses a lamp with a carrier device and with at least one lighting device mounted on the carrier device. The at least one lighting device has a carrier part, a plurality of lighting means units which are arranged on a side wall of the carrier part, and a reflector device fastened to the carrier part. The reflector device has at least two reflector sections spaced apart in a longitudinal direction, which are each formed by reflector surfaces that are concavely curved in at least two directions of curvature, with the at least two reflector sections being oriented towards the side wall of the carrier part, and with one lamp unit each being assigned to one of the at least two reflector sections is. Other lighting devices of the type mentioned are known from U.S. 2010/284181 A1 , DE 20 2017 106490 U1 , EP 2 813 753 A1 , DE 20 2014 104900 U1 and DE 20 2010 002018 U1 .

The object of the present invention is to provide a lighting device for use as a shelf washer or wall washer, which can illuminate the sales shelves without glare and can also be easily adapted to the individual local conditions.

The task is solved by a lighting system according to claim 1.

A special feature of the lighting system of the present invention lies in the configuration of the carrier profile and light unit, each of which is formed from a profile element. Using profile elements has several advantages. The lights can easily be dimensioned differently because the length of the profile elements can be adjusted individually. Furthermore, the use of a profile element, in particular an aluminum profile, for the light unit is advantageous in that the profile element can also serve as a heat sink for the semiconductor light sources provided in the light unit. According to the invention, the two profile elements of the light unit and the carrier unit are arranged pivotable into one another and to one another along an axis of the longitudinal extension of the profile elements. This allows the lighting unit to be swiveled in relation to the carrier profile in order to optimally align the light output with the goods to be illuminated on the shelves, depending on the installation height of the lighting system and the height of the shelves to be illuminated. The advantage here is that the pivotability is provided only in the longitudinal direction of the profile elements, because the lighting system is parallel to the shelves to be illuminated, for example along aisles between the shelves, is assembled. The carrier profile can be connected via a busbar system. In this case, it is provided that the electrical tap provided in the carrier profile engages in the wiring in the conductor rail system. However, it can also be provided that the lighting system is designed as a built-in or semi-built-in light. In this case, the electrical pick-off of the carrier profile also engages in the wiring in the building.

According to a preferred embodiment, the first and the second profile element have different lengths. This makes it possible to adapt the profile element of the light unit to the number of semiconductor light sources provided in a row and to adapt the profile element of the carrier profile to the type, i.e. to the length, of the electrical ballasts to be used. If the lighting system is set up for connection to a power rail, the profile elements of the carrier profiles can also be set up in such a way that they adjoin one another without a gap along the power rail. In general, the profile element of the carrier profile is longer than the profile element of the light unit.

According to the invention, the second profile element has end walls, which are each formed in two parts and the two parts of each end wall can be mechanically joined together, in particular plugged, in different angular positions, with the light unit being held on the carrier profile by means of the end walls, so that the angular positions of the joined end walls the pivoting movement of the second profile element is defined relative to the first profile element. The design of the mechanism for the pivoting movement in the form of two-part end walls is advantageous because no axis is required in order to arrange the light unit in a pivotable manner with respect to the carrier profile.

Furthermore, the end walls can also serve to accommodate the cabling. The end walls are arranged at the two opposite ends of the light unit and will generally not also form both end walls of the carrier profile at the same time. However, it is provided that, in particular, an end face of the carrier profile and an end face of the light unit are aligned with one another and these end faces are covered with an end wall. At least one of the end walls can preferably be mounted at any point along the longitudinal extension of the carrier profile. This means that the same carrier profile can be used for lighting units of different lengths.

According to a further preferred embodiment, the optics assigned to the semiconductor light sources each have a primary and a secondary reflector, with the primary reflector being arranged adjacent to the respective semiconductor light source and being set up to reflect the light from the semiconductor light source onto the respective secondary reflector, with the secondary reflector Deflects light laterally relative to an optical axis of the primary reflector. The primary reflector serves to reduce the glare of the luminaire and to prepare the light rays for the secondary reflector. The secondary reflector is used to deflect the light beams to the area to be illuminated and to generate the desired light distribution. A particular advantage is that the primary reflectors can be combined with different secondary reflectors. This makes it possible to set up the same lighting unit for the desired application, e.g. as a wallwasher or shelfwasher, with only the secondary reflector having to be adjusted.

According to a further preferred embodiment, at least some of the secondary reflectors are shell-shaped educated. The shell-shaped secondary reflectors create a wide illumination of the target area. The curvature or the ratio of length to width of the secondary reflector can be adjusted individually in order to create different light distributions. It is also possible to design a highly focused secondary reflector to create accent lighting on the target surface. In general, however, wide-beam secondary reflectors are preferred for illuminating the shelf or wall surfaces along their length.

In accordance with a further preferred embodiment, the secondary reflectors of the plurality of semiconductor light sources are each of identical design, or at least two of the secondary reflectors are of different design. If the light unit is only used to illuminate a shelf area, the secondary reflectors are preferably used in the light unit for this lighting task of a single type. If the lighting unit is used to illuminate a shelf or wall surface, the use of the same type of secondary reflectors for this lighting task is also advantageous. Depending on the room situation, it is also possible that the same lighting unit is used to illuminate different sections of shelves or walls. In this case, the types of secondary reflectors can also be different within one light unit. For example, one or more secondary reflectors can be used at one end of the light unit, which illuminate a lateral section of the room beyond one shelf end of an aisle, while the remaining secondary reflectors in the light unit are intended for lighting a continuous row of shelves. Accordingly, secondary reflectors of different embodiments can be combined in one light unit.

According to a further preferred embodiment, the secondary reflectors are snapped into receptacles on the second profile element, with the snap-in connection being detachable. The inclusion of the secondary reflectors by means of detachable snap-in connections is an advantage because the secondary reflectors can then be exchanged even after the light units have been installed, in order to adapt the light distribution individually to the spatial conditions.

According to a further preferred embodiment, the optics also have at least one additional reflector which is arranged inside one of the secondary reflectors and is designed to deflect part of the light which is emitted from the primary reflector to the secondary reflector by an angle of at least 30° with respect to the Deflect main emission of the secondary reflector. The additional reflector serves in particular to also use the light distribution of the lighting device to illuminate a section of aisle in front of the shelf to be illuminated. The auxiliary reflector deflects a portion of the light incident on the secondary reflector downwards by at least 30° to illuminate the horizontal surface in front of the shelf section. In a light distribution curve of the C180-0 level, the additional reflector also generates a secondary maximum, which is approximately in the range of ±10°.

According to a further preferred embodiment, the additional reflector is plugged into the light unit in a detachable manner. The additional reflector can, for example, be inserted into a slot on the secondary reflector mount or in the secondary reflector itself. Other detachable connections, such as a screw connection, are also conceivable. The advantage is that the additional reflector can be retrofitted at any time or individually at the installation site of the lighting system can be installed. In particular, it is also provided that the additional reflectors are installed only in some of the secondary reflectors of the light unit. This allows the amount of light to illuminate the aisle in front of the shelf to be adjusted individually.

According to a further preferred embodiment, the secondary reflectors have faceting, in particular hexagonal faceting. The faceting of the secondary reflectors enables a homogeneous color and brightness distribution on the area to be illuminated.

According to a further preferred embodiment, the semiconductor light sources are arranged on a circuit board which is in planar contact with the second profile element in order to create a thermal connection to the second profile element. The use of a profile element, in particular made of aluminum or another metal, eliminates the need for a separate heat sink for the semiconductor light sources. For this purpose, the semiconductor light source with the circuit board is attached flat to the profile element of the light unit, whereby flat attachment can also be understood to mean that an insulating layer can be provided between the circuit board and the metallic profile element. However, the insulating layer is so thin that heat can be transported almost unhindered between the semiconductor light sources and the profile element.

According to a further preferred embodiment, the circuit board also carries part of the optics, in particular at least one of the primary reflectors. As a result, the unit can be prefabricated from semiconductor light sources and primary reflectors and cut individually to the length of the light unit. Furthermore, the alignment of the primary reflector to the light source is very precise when both Components are mounted on the same circuit board. Even if the circuit board and the profile element in the light unit exhibit different thermal elongation, the primary reflector remains aligned with the semiconductor light source. The secondary reflector, on the other hand, can also be mounted directly or indirectly on the profile element of the light unit. Since the secondary reflector has a larger spatial extent, a slight tolerance with regard to the position of the semiconductor light source or the primary reflector is acceptable.

Figur 1

zeigt eine perspektivische Ansicht eines Beleuchtungssystems gemäß einer ersten Ausführungsform.

Figur 2

zeigt eine perspektivische Ansicht eines Beleuchtungssystems gemäß einer zweiten Ausführungsform.

Figur 3

zeigt eine Seitenansicht des Beleuchtungssystems der ersten Ausführungsform.

Figur 4

zeigt einen Querschnitt durch das Beleuchtungssystem entsprechend der Abbildung in Figur 3.

Figur 5

zeigt eine Seitenansicht des Beleuchtungssystems der zweiten Ausführungsform.

Figur 6

zeigt einen Querschnitt durch das Beleuchtungssystem entsprechend der Abbildung in Figur 5.

Figur 7

zeigt einen Querschnitt durch das Beleuchtungssystem nach beiden Ausführungsformen spiegelverkehrt zu den Abbildungen in Figuren 4 und 6.

Figur 8

zeigt einen Querschnitt senkrecht zur Längserstreckung des Beleuchtungssystems der ersten Ausführungsform.

Figur 9

zeigt einen Querschnitt senkrecht zur Längserstreckung des Beleuchtungssystems der zweiten Ausführungsform.

Figur 10

zeigt eine Lichtverteilungskurve in der C-180-0-Ebene des Beleuchtungssystems der ersten Ausführungsform.

Figur 11

zeigt eine Lichtverteilungskurve in der C-180-0-Ebene des Beleuchtungssystems der zweiten Ausführungsform.

Further features and advantages of the present invention will become clear from the following description of preferred embodiments given in connection with the attached figures. The figures show the following:

figure 1

shows a perspective view of a lighting system according to a first embodiment.

figure 2

shows a perspective view of a lighting system according to a second embodiment.

figure 3

Fig. 12 shows a side view of the lighting system of the first embodiment.

figure 4

shows a cross-section through the lighting system according to the figure in figure 3 .

figure 5

Fig. 12 shows a side view of the lighting system of the second embodiment.

figure 6

shows a cross-section through the lighting system according to the figure in figure 5 .

figure 7

shows a cross-section through the lighting system according to both embodiments, mirror-inverted to the figures in figures 4 and 6 .

figure 8

shows a cross section perpendicular to the longitudinal extension of the lighting system of the first embodiment.

figure 9

shows a cross section perpendicular to the longitudinal extent of the lighting system of the second embodiment.

figure 10

Fig. 12 shows a light distribution curve in the C-180-0 plane of the lighting system of the first embodiment.

figure 11

Fig. 12 shows a light distribution curve in the C-180-0 plane of the lighting system of the second embodiment.

The lighting systems according to the present invention comprise a modular system which comprises a carrier profile 4 and a light unit 2 in the first embodiment and a light unit 3 in the second embodiment. The first embodiment forms a shelf washer and the second embodiment forms a wall washer. The embodiments differ only in the design of a secondary reflector, whereby different light distributions are achieved, as follows in connection with the Figures 10 and 11 is explained.

Both embodiments are described below, with the same reference numbers being used for the corresponding elements of the two embodiments.

The carrier profile 4 includes an aluminum extruded profile 46. This is flexible in the longitudinal dimension and thus allows the inclusion of different ballasts 42 and electrical additional modules. The carrier profile 4 can be connected to a conductor rail 1 . The carrier profile is mechanically and electrically contacted via the busbar 1 . The carrier profile 4 has an aluminum profile 46, which can be custom-made in terms of length, as well as locking end walls 45 mounted thereon, which offer a mechanical connection for the light unit 2 or 3.

The light unit 2 or 3 also has an aluminum profile 24, which can be individually manufactured in length. In particular, it is provided, as shown in the figures, that the aluminum profile 24 of the light unit 2 or 3 is shorter than the aluminum profile 46 of the carrier profile 4 . Depending on the number of lamps required, the light unit can be made shorter or longer. On the other hand, depending on the electrical ballasts 42 to be used, the carrier profile can be dimensioned accordingly.

The light unit 2 or 3 is pivoted in the carrier profile 4. The adjustment mechanism and thus the alignment of the lighting technology is effected by the end walls 21 mounted on the side, which together with the associated locking end walls 45 provide the necessary adjustment mechanism. The two parts 21 and 45 of the end walls are snapped into one another by means of a plug connection, with the two parts being pivotable in relation to one another. Furthermore, notches on a part of the end wall 21 or 45 may be provided which engage in notches of the opposite part 45 or 21 to lock the connection of the two parts in three or more angular positions relative to each other.

The one-piece aluminum profile 24 of the light unit 2 or 3 serves to accommodate primary reflectors 27 and secondary reflectors 22 of the first embodiment and 31 in the second embodiment. Semiconductor light sources 28 are held on a circuit board 29 on the aluminum profile 24 of the light unit 2 or 3, the circuit board 29 simultaneously serving as a holder for the primary reflector 27 assigned individually to the semiconductor light sources 28. The printed circuit board 29 rests flat against the aluminum profile 24 for better thermal connection. As a result, the aluminum profile 24 can serve as a heat sink for the semiconductor light sources 28 . The primary reflector 27 placed directly on the semiconductor light source 28 serves to reduce glare and to prepare the light radiation for the secondary reflector 22 or 31.

The secondary reflectors 22 and 31 form what is known as a wallwasher in the first embodiment and a shelfwasher in the second embodiment. The light distribution curves, which are generated with the different secondary reflectors are in the figures 10 and 11, respectively. The light distribution of the shelf washer has a maximum at about 30° in the C180-0 plane (this corresponds to the section plane according to the Figures 8 and 9 ) on. For the wallwasher, the maximum of the light distribution is slightly lower in the range between 20° and 30°. In comparison to the shelfwasher, the wallwasher also has a more pronounced secondary maxima or shoulder at an angle of more than 40°. The light distribution of the shelf washer is specially designed to illuminate the goods on a shelf that is set up laterally to the longitudinal extension of the lamp. In particular, the upper rows of shelves are increased in depth illuminated. The wallwasher, on the other hand, is designed with a light distribution that also illuminates an adjacent wall section.

The secondary reflectors 22 and 31 in both embodiments are held in the light unit 3 by a holder 23 . The holder 23 is designed as a spring element and holds the secondary reflector 22 or 31 at one edge. The connection is detachable so that the secondary reflectors can be easily replaced. This makes it possible to replace the secondary reflectors even if the lamp is still installed. According to the invention, other forms of secondary reflectors can also be used. Depending on the area to be illuminated, the secondary reflectors can have different shapes. The shell-shaped configuration shown in the figures is preferred, with the secondary reflectors differing in particular in the ratio of length to width of the shell shape. Even wider and even shorter reflectors are also conceivable. Preferably, the secondary reflectors 22 and 31, as in the Figures 8 and 9 shown, a faceting on. The faceting enables a homogeneous color and brightness distribution on the area to be illuminated.

The two illustrated embodiments also have an additional reflector 26 which is inserted into the receptacle of the secondary reflector. The additional reflector 26 can optionally be installed in the lamp and is used to deflect part of the light from the secondary reflector downwards. This part of the light can be used to illuminate the aisle area in front of the shelf. It is therefore possible according to the invention to use the lighting system not only to illuminate shelves or wall sections, but also the traffic area in front of the shelves at the same time to illuminate. This eliminates the need for additional lighting, which takes over this task.

In the two illustrated embodiments, the secondary reflectors 22 and 31 are each used only in one type in a light unit 3 . However, it is possible to use the reflector shapes or possibly other reflector shapes mixed in one light unit 3 . Since the secondary reflectors are held in the aluminum profile of the light unit by the snap mechanism described, different reflectors can be combined without great effort in order to individually adapt the lighting to the local conditions. Furthermore, it is also possible to provide the additional reflector only in some of the secondary reflectors of a light unit. Depending on the amount of light needed to illuminate the aisle in front of the shelf, only part of the secondary reflectors in the light unit can be converted for this task by providing the additional reflector.

The lighting system shown therefore makes it possible to adjust the lighting units to the individual circumstances in a modular manner. The units can be attached in a row one behind the other, eg a power rail. However, it is also possible to carry out the arrangements in a polygonal manner. Due to the modular structure, the units can therefore be manufactured individually in length. This creates a high degree of flexibility for the desired light output as well as in relation to the thermal requirements.

REFERENCE LIST

1

power rail

2; 3

light unit

4

carrier profile

21

part of the front wall

22; 31

secondary reflector

23

holder

24

second profile element

26

additional reflector

27

primary reflector

28

semiconductor light source

29

circuit board

41

mechanical locking

42

ballast

43

holder

44

electrical tap

45

part of the front wall

46

first profile element

47

bracket

Claims (11)

1. Lighting system comprising a carrier profile (4) and a light unit (2; 3), wherein

   the carrier profile (4) comprises a first profile element (46), in particular an aluminium extruded profile, and has an electrical tap (44), which is designed for contacting electrical cabling, e.g. in the busbar (1), and the carrier profile (4) furthermore accommodates an electrical ballast (42), and wherein

   the light unit (2; 3) has a second profile element (24), in particular an aluminium extruded profile, which has semiconductor light sources (28) arranged linearly along its longitudinal extent and optical units (22; 31, 27) respectively assigned to the semiconductor light sources (28), wherein the second profile element (24) is oriented in its longitudinal extent parallel to the first profile element (46) of the carrier profile (4) and is mounted in the carrier profile (4) pivotably about an axis parallel to the longitudinal extent of the first and second profile elements (46, 24), characterised in that the second profile element (24) has end walls (21, 45), which are each formed in two parts and the two parts of each end wall (21, 45) are mechanically joinable, in particular pluggable, to one another in different angular positions, wherein the light unit (2; 3) is held on the carrier profile by means of the end walls (21, 45), so that the pivoting movement of the second profile element (24) with respect to the first profile element (46) is defined by the angular positions of the joined end walls (21, 45).
2. Lighting system according to claim 1, wherein the first and the second profile element (46, 24) have different lengths.
3. Lighting system according to any one of the preceding claims, wherein the optics associated with the semiconductor light sources (28) each comprise a primary (27) and a secondary reflector (22; 31), the primary reflector (27) being arranged adjacent to the respective semiconductor light source (28) and being adapted to reflect the light of the semiconductor light source (28) onto the respective secondary reflector (22; 31), wherein the secondary reflector (22; 31) laterally deflects the light with respect to an optical axis of the primary reflector.
4. Lighting system according to claim 3, wherein at least some of the secondary reflectors (22; 31) are scallop shaped.
5. Lighting system according to claim 3 or 4, wherein the secondary reflectors (22; 31) of the plurality of semiconductor light sources (28) are each formed the same or at least two of the secondary reflectors (22; 31) are formed differently.
6. Lighting system according to any one of claims 3 to 5, wherein the secondary reflectors (22; 31) are snapped into receptacles on the second profile element and the snap connection is releasable.
7. Lighting system according to any one of claims 3 to 6, wherein the optics furthermore comprise at least one auxiliary reflector (26), which is arranged within one of the secondary reflectors (22; 31) and is adapted to deflect a part of the light, which is emitted from the primary reflector (27) to the secondary reflector (22; 31), by an angle of at least 30° with respect to the main emission direction of the secondary reflector (22; 31).
8. Lighting system according to claim 7, wherein the auxiliary reflector (26) is releasably plugged into the light unit (2; 3).
9. Lighting system according to any one of claims 3 to 8, wherein the secondary reflector (22; 31) has a faceting, in particular a hexagonal faceting.
10. Lighting system according to any one of the preceding claims, wherein the semiconductor light sources (28) are arranged on a board (29) which is in planar contact with the second profile element (24) in order to establish a thermal connection to the second profile element.
11. Lighting system according to claim 10, wherein the board (29) furthermore carries a part of the optics, in particular at least one of the primary reflectors (27) when referring back to any one of claims 3 to 9.

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