EP4421380A1

EP4421380A1 - Reflector system for a recessed luminaire

Info

Publication number: EP4421380A1
Application number: EP23158665.2A
Authority: EP
Inventors: Peter Hesse; Frank Holtmann
Original assignee: Zumtobel Lighting GmbH Austria; Zumtobel Lighting GmbH
Current assignee: Zumtobel Lighting GmbH Austria; Zumtobel Lighting GmbH
Priority date: 2023-02-27
Filing date: 2023-02-27
Publication date: 2024-08-28
Also published as: WO2024179769A1

Abstract

A reflector system (10) for a recessed luminaire (1) with a light emitting surface (301) and such a recessed luminaire (1) is provided. Hereby, the reflector system (10) comprises a base body (100), an inner reflector body (200), and a translucent protective plate (300) disposed on a bottom surface (220) of the inner reflector body (200). The inner reflector body (200) is sealed on its bottom surface (220) with the protective plate (300), wherein the protective plate (300) forms the light emitting surface (301) of a respective recessed luminaire (1).

Description

The invention relates to a recessed luminaire and a reflector system for such a recessed luminaire, whereas the reflector system provides - beside optical benefits - a certain protection for the recessed luminaire.
Recessed luminaires are usually installed with their housing or base body inside a mounting hole, e.g. in a ceiling or wall. This means that the components accessible from the outside, such as the mounting ring and the glass pane of the recessed luminaire, are usually the most stressed components when it comes to protecting the recessed luminaire, especially from dust or water.
Therefore, recessed luminaires known so far have always tried to increasingly seal the contact to the supporting surface of the wall or ceiling on the one hand and to further protect the entire underside of the recessed luminaire - i.e. the side of the light emitting surface of the recessed luminaire - from external influences with respective sealing systems and other protective components.
The so-called ingress protection (IP) classification system is used to determine the level of protection provided by an electrical device against the ingress of foreign bodies (such as dust) and water/moisture. The IP classification system is important for ensuring that devices are suitable for use in specific environments and to ensure the safety and longevity of the device. The IP classification system consists of two digits. The first digit represents the level of protection against the ingress of solid foreign bodies, while the second digit represents the level of protection against the ingress of water/moisture. The higher the digits, the better the protection. For example, an IP-54 rated device is protected against dust and splashing water, while an IP-65 rated device is dust-tight and further protected against powerful jets of water.
For example a recessed luminaire with an IP-54 rating is protected against dust and splashing water, making them suitable for use in environments where there may be a moderate amount of dust or splashing water present. These luminaires may be suitable for use in indoor areas such as kitchens or bathrooms. The IP-65 rated recessed luminaire has additional protection against dust, as the such rated luminaire is dust-tight, and has further protection against water jets. This makes the IP-65 rated recessed luminaire suitable for use in environments where there may be direct exposure to water - such as shower areas or outdoor environments or the like - or extensive dust - as (outdoor) construction zones or arid regions or the like.
Figure 5 displays an excerpt of a known recessed luminaire with a base body 9100 and a reflective surface 9211 on an inner side 9210 of the luminaire. Further, figure 5 shows a recessed luminaire with an elaborate protection system 9000, 9001, 9003, formed by an extra cover 9000 of the recessed luminaire, which overlaps the mounting frame 9127 of the recessed luminaire by means of a sealing cover 9001 and also has a glass plate 9003 as the light emitting surface of the recessed luminaire. By means of special structures of the protection system 9000, 9001, 9003, which interact with the mounting frame 9127 of the recessed luminaire, and further overlaps of the cover 9001 and the glass plate 9003, a recessed luminaire with IP-54 classification is thus created.
However, as explained above, there are scenarios in which an overall IP-54 classification is no longer sufficient, so there is a need for recessed luminaires with a higher IP classification.
Thus, the invention is concerned with the task of providing a recessed luminaire that is particularly durable with respect to environmental influences.
According to the invention a reflector system for a recessed luminaire with a light emitting surface is provided. The reflector system comprises:

a base body having a light source receiving space for receiving a light source of the recessed luminaire, and having an outer wall body extending further from the light source receiving space laterally and in a light emitting direction of the light source, wherein the outer wall body forms an inner receiving space for receiving an inner reflector body;
an inner reflector body having a reflective surface on its inner side; and
a translucent protective plate disposed in the light emitting direction on a bottom surface of the inner reflector body.

Further, the recessed luminaire with the light emitting surface itself is provided. The recessed luminaire hereby comprises:

a respective embodiment of the herein provided reflector system; and
a device body which is coupled to the reflector system, preferably to the base body of the reflector system, via a coupling connection.

With the so created reflector system, respectively luminaire with such a reflector system, the reflector, as well as the inside of the reflector, as well as the components of a respective connected device body of a recessed luminaire, are protected particularly advantageously, lastingly and effectively against external influences. By means of the base body surrounding the inner reflector body, the inner reflector body is protected from external impacts, shocks and the like, whereas the protective plate prevents foreign bodies (water, moisture, dust, etc.) from entering the inner reflector body from the underside of the reflector system. Furthermore, the base body, and in particular the outer wall body, and the inner reflector body received in the inner receiving space together have a synergetic effect that makes it more difficult for water (or foreign bodies in general) to enter the recessed luminaire.
Optionally the protective plate has optical elements disposed on the inner and/or on the outer side of the protective plate. Hereby an individual and scenario suited light emission is achieved.
Optionally the protective plate is irreversibly connected to the bottom surface of the inner reflector body by means of ultrasonic wave welding. The such configured reflector system, and in particular the connection between the protective plate and the inner reflector body is particular advantageous, effective and durable. Thus, a recessed luminaire which is equipped with such a reflector system can be used in various scenarios, even with high moisture and/or dust conditions.
Optionally the sealing of the inner reflector body by the protective plate protects the inner side of the inner reflector body at least according to IP code IP-65. Thus, preferably the recessed luminaire is protected by the reflector system at least according to IP code IP-65. The such configured reflector system respectively the such configured recessed luminaire is particularly advantageous.
Optionally there is an air gap between the outer surface of the inner reflector body and the outer wall body as well as between the protective plate and the outer wall body. This air gap between the outer wall and the components arranged in the inner receiving space (i.e., the inner reflector body and the protective plate) provides an integrated automatic ventilation of the reflector system and thus of the recessed luminaire, so that generated heat (e.g. generated by the device body of the recessed luminaire) is efficiently and easily conducted away from the luminaire. In this respect, ambient air from the underside of the recessed luminaire is used for heat dissipation. In addition, the air gap has another symbiotic effect, namely water ingress is prevented by the capillarity of the above-mentioned components. The capillarity created by the distance between the outer surfaces of the above-mentioned components prevents water from penetrating deep into the reflector system and also promotes that the water can run off the reflector system. This is favoured in particular (depending on the installation direction of the recessed luminaire) by the gravitational force.
Optionally the bottom end of the inner reflector body in the region of the bottom surface has over its entire circumference a projection extending outwardly, i.e. in the direction of the outer wall body. This circumferential projection of the inner reflector body has the advantage of increasing the stability and rigidity of the inner reflector body, while also creating a larger coupling surface with the protective plate, so that this connection is also strengthened by this configuration. Furthermore, the distance between the inner reflector body and the outer wall is reduced, so that the entry of foreign bodies into the gap is further reduced. Further preferred the projection does not contact the outer wall, such that there is a gap in between.
Optionally the projection provides a varying distance between the inner reflector body and the outer wall body. By varying the distance between the inner reflector body and outer wall, the effect of capillarity is further enhanced, thus preventing foreign bodies from entering the luminaire. This further improves the ejection of any foreign bodies, and the air circulation is also increased. In general, the air circulation also favours that, for example, dust that has entered the luminaire is not collected inside the luminaire, but is removed from the luminaire. Preferably the varying distance is subsequent to the air gap, this further enhances the above standing effects.
Further preferably the varying distance is always greater than zero, meaning that there is no contact between the outer wall body and the inner reflector body. The varying distance becomes increasingly larger in the direction opposite to the light emitting direction, which further increases the capillarity. The largest jump in the distance between the inner reflector body and the outer wall is directly after the projection of the inner reflector body (viewed in the opposite light emitting direction). The step-like structure created by the projection further enhances the effect of capillarity.
The distance between two surfaces affects the capillary action and thus the depth of water penetration. Generally a larger distance between the surfaces generally favours a lower depth of water penetration, as capillary action decreases as the distance increases. This is because capillary action is caused by the adhesion of water to the walls of the capillary and the cohesion of water within the capillary. When the distance between the surfaces increases, the attraction between the walls of the capillary and the water decreases, resulting in less water entering the joint - respectively the air gap of the reflector system. However in synergy with a broadening of a respective distance between two surfaces the capillary action drastically decreases, as the adhesion and cohesion forces decrease as the distance increases, making it difficult for the water to be held in the j oint, so that the water will tend to flow out rather than penetrating the air gap.
Optionally a distance between the inner reflector body and the outer wall body is smallest in the region of the projection. The such configured reflector system provides a particular efficient protection against foreign bodies (moisture, dust, water etc.), while simultaneously improving air circulation due to thermic effects and drain of water, for example. Preferably the distance between the projection of the inner reflector body and the outer wall body, and a distance between the protective plate and the outer wall body is substantially equal and constant. Thus, the air gap has a constant distance, which improves the drain capabilities of the reflector system, whereas deposits of foreign bodies in the area around the coupling of the inner reflector body and the protective plate are averted, improving functionality of a respective recessed luminaire.
Optionally the inner reflector body is reversibly couplable to the base body. Preferably the inner reflector body has at least one coupling element on the side of the inner reflector body facing the light source receiving space for coupling with the base body. These features enable a particularly simple and efficient installation and removal of the inner reflector body, which in particular simplifies and improves the maintenance of the luminaire. It can also be provided that different designs of the protective plate - for example with a special coating or with certain optical elements - are used in a targeted manner, so that the reversible coupling can be used to react individually and flexibly to corresponding lighting scenarios.
Optionally the base body has corresponding coupling elements for coupling the base body with the inner reflector body. This eases coupling of the two respective elements.
Optionally the base body further comprises a light-transmitting end plate, for closing off the bottom side - i.e. the side, in the direction of the inner reflector body - of the light source receiving space. With this configuration the reflector system and thus the recessed luminaire has a further protection of the light source receiving space, and the therein placed electrical components. Further preferred the end plate comprises on its face side the corresponding coupling elements for coupling the base body with the inner reflector body. With this configuration a particular easy yet effective coupling is performed, whereas the coupling elements do not interfere with a respective emitted light. Further preferred the light-transmitting end plate comprises optical elements, which further improve light emission of the luminaire.
Optionally the closure of the light source receiving space by the end plate protects the light source receiving space at least according to IP code IP-44. This allows the luminaire to be particularly protected against external influences. In particular, in combination with the upstream (viewed against the light emitting direction) protection - preferably according to IP-65 - a particularly protected and advantageous implementation of a recessed luminaire is formed.
Optionally the outer wall body has an outwardly projecting flange on its side opposite to the light source receiving space. Preferably the outwardly projecting flange forms a mounting frame of a respective recessed luminaire. These features provide a particularly advantageous interaction with the surface forming the installation opening/mounting hole (e.g. wall/ceiling etc.), whereby sealing contact with this surface can be achieved with this flange in particular. This prevents foreign bodies from entering the mounting hole.
Optionally the reflective surface is realized by a white and/or silver paint and/or by reflective surface elements. This further improves the light emission properties of the luminaire, enabling particularly aesthetic, homogeneous and efficient light emission.
Optionally the recessed luminaire has at least one anchor element for reversible mounting within a mounting hole, in particular a mounting hole of a ceiling, a wall or the like. Preferably the at least one anchor element is formed on the device body and/or on the reflector system - and here preferably on the base body - of the recessed luminaire. This enables particularly simple assembly and disassembly.
The invention is explained in detail below with reference to examples of embodiments and with reference to the drawing. The figures show:

Figure 1: Schematic illustration in a side view of an exemplary embodiment of a recessed luminaire with an exemplary embodiment of a reflector system and a device body;
Figure 2: Schematic illustration of an exemplary embodiment of a reflector system in a sectional view through a central axis of the reflector system;
Figure 3: Schematic illustration of an exemplary embodiment of a reflector system in an exploded cross-sectional view with section through a central axis of the reflector system;
Figure 4: Schematic illustration of an exemplary embodiment of a recessed luminaire, respectively of a reflector system of such a recessed luminaire, which is installed in a mounting hole of a ceiling, with a section through a centre axis of the reflector system, showing an enlarged sectional view of the contact of the ceiling with the reflector system and the structure of the reflector system;
Figure 5: Schematic illustration of a known reflector system for a recessed luminaire in a sectional view through a central axis of the reflector system;
Figure 6: Schematic illustration of an exemplary embodiment of an inner reflector body with the thereto coupled protective glass plate in a side view.

Figure 1 shows an exemplary embodiment of a recessed luminaire 1 with a light emitting surface 301 having a reflector system 10 and a device body 700, which is coupled to the reflector system 10. Hereby on a surface of the device body 700 at least one light source is arranged, which emits light in a light emitting direction L towards the light emitting surface 301. In addition to the at least one light source, the device body 700 may comprise further components such as a power unit or the like.
Furthermore, the recessed luminaire 1 also has at least one anchor element 800 for reversible mounting within a mounting hole 900, in particular a mounting hole 900 of a ceiling 996, a wall or the like. In the shown embodiment the recessed luminaire 1 has two anchor elements 800, disposed on opposite sides of the device body 700, whereas it is also conceivable, that the at least one anchor element 800 is formed on the reflector system 10, or both on the reflector system 10 and the device body 700.
As shown in Figures 2 and 3 the base body has a light source receiving space 110 for receiving the light source of the recessed luminaire 1. The light source receiving space 110 is formed by a surrounding receiving space wall 111, which laterally encompasses the light source receiving space 110.
On an outer side of this wall 111, the base body 100 passes over a projection into the outer wall body 120, which extends in light emitting direction L substantially to the underside of the reflector system 10, or the recessed luminaire 1.
In the shown exemplary embodiment of the reflector system 10, the outer wall body 120 forms an outer shell of the reflector system 10, wherein the outer wall body 120 merges on its underside - i.e. the side visible to a user when the recessed luminaire 1 is installed - into an outwardly extending flange 127, which forms a typical mounting frame of a respective recessed luminaire 1. In this regard the shell-like structure of the outer wall body 120, as well as the flange 127 physically protect the inner reflector body 200, which is arranged on the inside of the base body 100, and components - such as the protective plate 300 - connected thereto.
The outer wall 120 hereby forms an inner receiving space 121 inside the base body 100. The inner reflector body 200 is accommodated in this inner receiving space 121 and can preferably be reversibly coupled with the base body 100.
As indicated in figure 1 and shown in detail in figure 2, the inner reflector body 200 is aligned flush with a light-transmitting end plate 130 of the base body 100 on its upper side. Hereby the end plate 130 closes off the bottom side of the light source receiving space 110, whereas this bottom side faces the inner reflector body 200. Protective glass plate 300 and internal reflector body 200 are ultrasonically welded and then form a unit, which is latched to the light-transmitting end plate 130 by means of latching lugs. Alternatively, the end plate 130 can also be glued. Other form-fit or force-fit couplings are also conceivable.
In particular, it can be provided that the (reversible) coupling between base body 100 and inner reflector body 200 is achieved by means of at least one coupling element 250 of the inner reflector body 200 and corresponding coupling elements 140 of the base body 100, which can be arranged in particular on the light-transmitting end plate 130. In the embodiments shown in Figures 2 and 3 the inner reflector body 200 has four coupling elements 250 on a top side of the inner reflector body 200, which faces the light source receiving space 110, for coupling with the base body 100.
In particular, these corresponding coupling elements 140 can be arranged on the face side 131 of the light-transmitting end plate 130, as shown in Figure 2.
As can be seen in particular from the exploded view in Figure 4 and the composite view in Figure 2 of an exemplary embodiment of the reflector system 10, the inner reflector body 200 is connected to the light-transmitting end plate 130in a simple manner by the snap-on coupling elements 250. It is also worth mentioning that the inner reflector body 200, and in particular the outer surface 240 of the inner reflector body 200, do not come into contact with the outer wall body 120, but that there is always a gap on the inner side 121 between the outer wall body 120 and the reflector body 200.
The inner reflector body 200 hereby has a reflective surface 211 on its inner side 210, which improves light guidance. The reflective surface 211 may be realized by a white and/or silver paint and/or by reflective surface elements.
The translucent protective plate 300 is disposed in light emitting direction L on a bottom side / bottom surface 220 of the inner reflector body 200, such that the inner reflector body 200 is sealed on its bottom surface 220 with the protective plate 300. Hereby the protective plate 300 forms the light emitting surface 301 of the recessed luminaire 1.
The protective plate 300 may have surface structures for special light extraction, whereby the translucent protective plate 300 may only be transparent to a limited extent or not at all.
In the embodiments of the luminaire 1 or reflector system 10 shown in the figures, the protective plate 300 is irreversibly connected to the bottom surface 220 of the inner reflector body 200 by means of ultrasonic wave welding. Alternatively, the protective plate 300 may be glued or otherwise fixed to the inner reflector body 200, but ultrasonic welding has been found to provide a particularly durable, hard-wearing and tight coupling of the components.
The sealing of the inner reflector body 200 by the protective plate 300 protects the inner side 210 of the inner reflector body 200 at least according to IP code IP-65. Such an advantageous sealing was achieved in particular by means of ultrasonically welded components.
The compound of the inner reflector body 200 and the protective glass plate 300 is displayed in Figure 6. On the top side of the inner reflector body 200 a circular element is present, whereas the at least one coupling element 250 is placed thereon. In the shown embodiment the at least one coupling element 250 is formed via snap-on / snap-in elements, which are coupled with the base body 100 when inserted therein. In particular, the shown coupling elements 250 interact with the light-transmitting end plate 130. It is also shown in Figure 6 that the protective plate 300 extends to an outer edge of a projection 230 of the inner reflector body 200 and thus covers it flush from below. The outer surface 240 of the inner reflector body 200 extends from the coupling point with the protective plate 300 to an upper annular flange 290 on which the annular element with the at least one coupling element 250 is arranged. The upper annular flange 290 stabilises the upper area of the inner reflector body 200 and, in particular in combination with the outer wall body 120, forms a further protection against foreign bodies in this inner upper area of the reflector system 10, as can be seen in particular in Figure 2.
Here, the inner reflector body 200 in the embodiments shown in Figures 1 to 4 has at its bottom end 222 (i.e., in the region of the bottom surface 220) over its entire circumference a projection 230 extending outwardly, i.e. in the direction of the outer wall body 120. This projection 230, which extends towards the outer wall body 120, offers an enlarged contact surface and thus coupling surface of the inner reflector body 200 with the protective plate 300.
As can also be seen from Figures 1, 2 and 4, the recessed luminaire has an air gap 400 on its underside, which runs between the protective plate 300 and the outer wall body 120, as well as between the outer surface 240 of the inner reflector body 200 and the outer wall body 120, and in this case between the outer surface of the projection 230 and the outer wall body 120.
In the embodiment shown, the upper surface of the protective plate 300 has an essentially identical circumference as the inner reflector body 200 at its bottom surface 220. Thus, the protective plate 300 is adapted to the inner reflector body 200, respectively to its projection 230. Due to the projection 230 and the protective plate 300 adapted to the dimension of the projection 230, this air gap 400 is particularly narrow, whereby a gap is always present so that the outer wall body 120 does not come into contact with the protective plate 300 or the inner reflector body 120.
By minimizing the dimension of the air gap 400 (which can be on the order of 1 millimeter, 0.1 millimeter, or 0.01 millimeter), the potential pressure of an incoming water jet working on the reflector system 10 is limited.
As can be seen in particular in the detailed view of Figure 4, a subsequent step-like recess 501 is provided with the projection 230, which creates a varying distance 500 between the inner reflector body 200, respective outer surface 240 of the inner reflector body 200, and the outer wall body 120. This recess 501, or the varying distance 500, abruptly creates a greater distance between the two components. The distance between the inner reflector body 200 and the outer wall body 120 changes constantly over the course of the outer surface 240 up to the upper end of the inner reflector body 200. It is also envisaged that this distance is greatest in an upper region of the inner reflector body 200.
Thus, the varying distance 500 and the recess 501 is each subsequent to the air gap 400, whereas the varying distance 500 is always greater than zero. Further, the distance between the inner reflector body 200 and the outer wall body 120 is smallest in the region of the projection 230. As further shown in detail in Figure 4 the distance between the projection 230 of the inner reflector body 200 and the outer wall body 120, and the distance between the protective plate 300 and the outer wall body 120 is substantially equal and constant.
These individual structures each contribute to the tightness and sealing of the reflector system 10 and also promote air circulation between the inner reflector body 200 and the base body 100, respectively its outer wall body 120. Furthermore, the drainage of moisture and water (as well as other foreign bodies such as dust) that have penetrated into the space between the reflector body 200 and the base body 120 is facilitated.
In particular, the design of an air gap 400 and the adjacent recess 501 or varying distance 500 uses the effects of capillarity between the surfaces of the inner reflector body 200 and the outer wall body 120, whereby, for example, water forced into the air gap 400 by a jet of water cannot fill the entire gap between the inner reflector body 200 and the outer wall body 120, but due to the capillarity - as described above - a further penetration, in particular a penetration beyond half of the inner reflector body 200 (preferably beyond one third of the height of the inner reflector body 200, particularly preferably beyond one quarter of the height of the inner reflector body 200), is prevented. Thus the recessed luminaire 1, respectively the reflector system 10 provides sufficient proof against water jets, as no water accesses the inner components.
The combination of the structural elements air gap 400, recess 501, or varying distance 500, up to the maximum distance between inner reflector body 200 and outer wall body 120 in an upper region of inner reflector body 200 symbiotically supports the effect of capillarity. Furthermore, the gravitational force - depending on the installation direction of the recessed luminaire 1 - also favours the drainage of foreign bodies that have entered the intermediate space. Heat generated by the operation of the recessed luminaire 1 is also dissipated particularly efficiently by means of the structure of the reflector system 1 presented here, whereby automatic ventilation of the reflector system 10 or the recessed luminaire 1 is created by the gap between the inner reflector body 200 and the outer wall body 120, as well as the air gap 400. These thermal effects also promote air circulation within the reflector system 10.
In this respect, when the recessed luminaire 1 is installed in a mounting hole 900, for example a ceiling 996, the recessed luminaire 1 is sealed from the underside of the luminaire 1 by the protective plate 300, as can be seen in particular in Figures 1, 2 and 4. Foreign bodies such as dust, water or moisture can therefore potentially only enter the space between the outer wall body 120 and the inner reflector body 200 of the reflector system 10 via the air gap 400, whereby the structure of the reflector system 10 favours the subsequent removal of these foreign bodies - as described above.
In the embodiments of the luminaire 1 shown in the figures, the light source receiving space 110 is also sealed off by the end plate 130, whereby a tightness of IP-44 according to the IP classification is preferably achieved here.
Furthermore, the structure of the reflector system 10 presented herein promotes the avoidance of so-called fogging of a luminaire due to accumulation of moisture on the light-emitting surface of the respective luminaire. Due to the sealed reflector system 10, respectively the recessed luminaire 1 according to the invention and the further preferred embodiments presented herein, such fogging is avoided even under adverse environmental conditions, such as high humidity and direct water irradiation.
As shown in Figures 1 to 4, a beveled edge surface 126 forms the transition between frame-like flange 127 of base body 100 and outer wall body 120. In addition to aesthetic aspects, this beveled edge surface 126 also has functional advantages. In particular, this edge surface 126 can also serve as an additional reflector surface on the outside. It also provides a guide surface to the air gap 400 between the protective plate 300 and the outer wall body 120, respectively between the inner reflector body 200 and the outer wall body 120, so that the air circulation in the space between the inner reflector body 200 and the outer wall 120 is improved overall. In addition, the beveled edge surface 126 also promotes water drainage from the space between the inner reflector body 200 and the outer wall 120 due to the direct contact with the air gap 400 as drainage.
Furthermore, optical elements can also be provided on a surface (preferably the inner surface facing the inner side 210 of the inner reflector body 200) of the protective plate 300 for improved light emission. Through reversible coupling of the inner reflector body 200 to the base body 100, the reflector system 10 can be adapted to individual requirements of a user, whereby in particular it can be provided that differently designed protective plates 300 are available for different lighting scenarios, which can be exchanged together with the inner reflector body 200 depending on the situation.
As shown in Figures 2 and 3, the reflector system 10 can also be coupled to the device body 700 by means of snap-in coupling elements 170 (or similar connecting elements) and is thus also reversibly connected to the latter. This enables particularly simple and cost-effective maintenance of the recessed luminaire.
By means of the outer flange bulge 128, a particularly advantageous sealing of the recessed luminaire 1, or of the reflector system 10, towards an installation opening 900, for example an installation opening 900 of a ceiling 996, is achieved. In particular, it can be provided that on the upper side of the flange 127 - i.e. that side of the flange 127 which is not visible to a user when the recessed luminaire 1 is installed - further bulges are provided for additional sealing and contacting.
Furthermore, the recessed luminaire 1 can have a round or rectangular, in particular square, base surface, whereby the base surface is the side visible from an underside of the recessed luminaire 1 - i.e. the side visible to a user when the recessed luminaire 1 is installed. In particular, it is conceivable that the base body 100 can be shaped essentially like a truncated pyramid or like a dome. Further, it is possible to produce the reflector system described here, or the recessed luminaire, in various shapes and sizes.
In a preferred embodiment, the inner reflector body 200 is substantially dome-shaped.
In this respect, a particular advantageous recessed luminaire 1, respectively reflector system 10 thereof, is accomplished, which has a particularly advantageous seal and thus particularly good durability and resistance. Compared to previously known recessed luminaires, no sealing elements and components are required, yet a tighter system has been created. The maintainability and thermal performance of the luminaire has also been improved.
It is also conceivable that the reflector system 10 described here can be used on existing recessed luminaires, i.e. that they are backwards compatible.

Claims

A reflector system (10) for a recessed luminaire (1) with a light emitting surface (301) comprising:
- a base body (100) having a light source receiving space (110) for receiving a light source of the recessed luminaire (1), and having an outer wall body (120) extending further from the light source receiving space (110) laterally and in a light emitting direction (L) of the light source,
wherein the outer wall body (120) forms an inner receiving space (121) for receiving an inner reflector body (200);

- an inner reflector body (200) having a reflective surface (211) on its inner side (210); and

- a translucent protective plate (300) disposed in the light emitting direction (L) on a bottom surface (220) of the inner reflector body (200);
wherein the inner reflector body (200) is sealed on its bottom surface (220) with the protective plate (300),
and wherein the protective plate (300) forms the light emitting surface (301) of a respective recessed luminaire (1).
Reflector system according to claim 1,
wherein the protective plate (300) is irreversibly connected to the bottom surface (220) of the inner reflector body (200) by means of ultrasonic wave welding.
Reflector system according to claim 1 or 2,
wherein the sealing of the inner reflector body (200) by the protective plate (300) protects the inner side (210) of the inner reflector body (200) at least according to IP code IP-65.
Reflector system according to any of the foregoing claims,
wherein there is an air gap (400) between the outer surface (240) of the inner reflector body (200) and the outer wall body (120) as well as between the protective plate (300) and the outer wall body (120).
Reflector system according to one of the previous claims,
wherein a bottom end (222) of the inner reflector body (200) in the region of the bottom surface (220) has over its entire circumference a projection (230) extending towards the outer wall body (120).
Reflector system according to claims 4 and 5,
wherein the projection (230) provides a varying distance (500) between the inner reflector body (200) and the outer wall body (120),

and wherein preferably the varying distance (500) is subsequent to the air gap (400),

and wherein preferably the varying distance (500) is always greater than zero.
Reflector system according to claim 6,
wherein a distance between the inner reflector body (200) and the outer wall body (120) is smallest in the region of the projection (230),

and wherein preferably the distance between the projection (230) of the inner reflector body (200) and the outer wall body (120), and a distance between the protective plate (300) and the outer wall body (120) is substantially equal and constant.
Reflector system according to any one of the preceding claims,
wherein the inner reflector body (200) is reversibly couplable to the base body (100),

and wherein preferably the inner reflector body (200) has at least one coupling element (250) on the side of the inner reflector body (200) facing the light source receiving space (110) for coupling with the base body (100).
Reflector system according to claim 8;
wherein the base body (100) has corresponding coupling elements (140) for coupling the base body (100) with the inner reflector body (200).
Reflector system according to any one of the preceding claims,
wherein the base body (100) further comprises a light-transmitting end plate (130), for closing off the bottom side of the light source receiving space (110),

whereas further preferred the end plate (130) comprises on its face side (131) the corresponding coupling elements (140) for coupling the base body (100) with the inner reflector body (200).
Reflector system according to claim 10;
wherein the closure of the light source receiving space (110) by the end plate (130) protects the light source receiving space (110) at least according to IP code IP-44.
Reflector system according to any one of the preceding claims,
wherein the outer wall body (120) has an outwardly projecting flange (127) on its side opposite to the light source receiving space (110),

and wherein preferably the outwardly projecting flange (127) forms a mounting frame of a respective recessed luminaire (1).
Reflector system according to any one of the preceding claims,
wherein the reflective surface (211) is realized by a white and/or silver paint and/or by reflective surface elements.
A recessed luminaire (1) with a light emitting surface (301) comprising:
- a reflector system (10) according to any of the preceding claims 1 to 13; and

- a device body (700), which is coupled to the reflector system (10), preferably to the base body (100) of the reflector system (10), via a coupling connection;
wherein on a surface of the device body (700) at least one light source is arranged, which preferably is thus received in the light source receiving space (110) of the base body (100);
and wherein preferably the recessed luminaire (1) is protected by the reflector system (10) at least according to IP code IP-65.
Recessed luminaire according to claim 14,
wherein the recessed luminaire (1) has at least one anchor element (800) for reversible mounting within a mounting hole (900), in particular a mounting hole (900) of a ceiling (996), a wall or the like,

and wherein preferably the at least one anchor element (800) is formed on the device body (700) and/or on the reflector system (10) - and here preferably on the base body (100) - of the recessed luminaire (1).