WO2009083610A1

WO2009083610A1 - Lighting device for pieces of furniture used for presenting products

Info

Publication number: WO2009083610A1
Application number: PCT/EP2009/050017
Authority: WO
Inventors: Albert Weiss
Original assignee: Albert Weiss
Priority date: 2008-01-03
Filing date: 2009-01-02
Publication date: 2009-07-09
Also published as: EP2232179A1; RU2010133606A; JP2011508867A; EP2232179B1; RU2480135C2

Abstract

The invention relates to a piece of furniture for presenting cooled or frozen products in a product chamber which is at least partially enclosed by means of transparent windows and has an access opening that can be closed by means of transparent movable windows. The product chamber is illuminated by means of a lighting device. The lamp of the lighting device is arranged in the product chamber, and an associated heat dissipating device is disposed such that the heat generated by the lamp is discharged outside the product chamber. A heat dissipating device which is designed as a functional part of the cooling piece of furniture is provided instead of the common cooling device for the LED lamps.

Description

Lighting device for goods display furniture

The invention relates to a goods display furniture for the presentation of chilled or frozen goods with a goods space which is at least partially enclosed by transparent panes and having an access opening which is closed by means of transparent movable windows, and the goods space is illuminated by a lighting device.

Goods presentation furniture with integrated lighting device are variously known. There are used primarily fluorescent tubes, which are usually arranged outside of the goods room. An arrangement of the fluorescent tubes within the goods space is avoided because emanates from the fluorescent tubes heat and especially UV radiation, which is undesirable in the goods space and the UV radiation would heat the refrigerated goods. However, the arrangement of such lighting devices outside the goods space has the disadvantage that light is lost through the insulating glazing, which indeed prevents the UV irradiation and therefore the lighting must be enhanced compared to a lighting, which is arranged within the goods room. The amplification of the lighting to compensate for the light losses requires a higher energy consumption. However, this higher energy requirement is accepted, since the heat emission of the luminous element within the goods compartment causes an increased cooling capacity, which has an even less favorable effect on the energy balance.

LED lights are used in a variety of forms and for a variety of purposes. The LED light is a cold light, ie it has no radiation, above all, no infrared or UV radiation and therefore can not generate heat accumulation in the refrigerated goods. The LED lights are made for example, from a thin metal band, the so-called. Board, on which the individual luminous bodies and the associated electronics are arranged. As with LED light, a large process heat is generated, which is much higher than with the fluorescent tubes, must be provided for a corresponding heat dissipation. Therefore, a kind of radiator (ribbed metal) is attached to the back side of the luminaire supporting board, while the front side is covered with a lens for protecting the luminous bodies. Again, there is the problem of stressing the energy balance through heat dissipation. If, for example, the LED lights are arranged outside the cold room in order not to allow this process heat to reach the cold room, a loss of light by the steamed pane of about 20-25% occurs. As a result, the lower energy consumption of LED luminaires is lost again.

The object of the invention is to provide a lighting device for goods display furniture for the presentation of refrigerated or frozen goods, which is particularly energy-efficient and yet ensures good lighting.

Due to the features of claim 1, this object is achieved. The fact that the heat generated by the filament is dissipated to the outside of the goods space, a direct illumination of the goods space is made possible so that light losses are avoided, but still the cooling performance does not have to compensate for the heat generated by the filament. The heat dissipation device is expediently arranged in the vicinity of the edges of the panes enclosing the goods space and extends along the edge of the pane so that the pane edge is heated with the heat dissipated by the luminous element. This has special significance in deep-frozen furniture, in which the temperature difference to the outside is very large and is avoided in these marginal areas of the discs formation of condensation.

The task is carried out through various, quite different forms solved. In goods display furniture with a vertical access opening to the goods compartment, which is divided into vertically stacked compartments, the angelseitigen ends of the doors form a gap in the region of the luminous body of the illumination device is arranged so that the filament is directly connected to the goods space, while the heat emitted by the luminous body is conveyed through a heat removal device through the intermediate space to the outside. With the use of LED luminous bodies, the LED luminous body is positioned on or in front of the goods room side of the intermediate space, while the heat removal device transports the heat via a heat dissipation to a heat sink which lies outside the goods compartment. The heat dissipation extends along the edge of the pane, so that the heat dissipated heat the pane edge to prevent condensation. Additional heating wires can be omitted. The heat dissipation device is expediently designed as a functional part of the cooling cabinet, to which the LED lighting elements are directly attached. It extends over the length of the window edge and covers the gap between the two adjacent doors with the door closed. The heat dissipation device as a functional part also serves as a stop for the window edge of the door when it is closed.

According to another embodiment, the illumination device is arranged vertically positioned in the goods compartment. This is particularly advantageous at the points where the angel end of the door connects to the side wall of the cabinet.

The luminous element, which can be both a fluorescent tube and can be formed from LED luminous bodies, is encapsulated in a jacket tube which surrounds the luminous element at a distance, so that a cavity is formed. Since the encapsulation has an opening at the lower and upper end, an air flow is created which dissipates the heat from the fluorescent tube or the heat sink so that it can not get into the goods space. Even with a goods display furniture in the manner of a freezer, which has sliding over the freezer door opening cover plates, the invention is to be used with advantage. Here are on a basic profile, which is also designed as a heat dissipation device, LED luminous bodies arranged in the goods compartment to illuminate this. The heat dissipated into the surrounding area is dissipated via the basic profile that the LED luminaires carry. The LED luminous bodies can be attached directly to the base profile, so that the cooling effect is improved. Contact resistances in heat dissipation are eliminated.

Another object of the invention is not only the removal of the heat generated by the filament, but also a use of this dissipated heat to heat the condensed water edges of the doors and border, so that energy-consuming heating wires are avoided as additional heating. In order to dissipate the heat also on the disc edges, which are not arranged parallel to the heat dissipation device, the disc edge is equipped with a heating tube, a so-called. "Heatpipe" which extends over all disc edges all around.

Since heating is not required at night even when heating is required, the luminaires are operated at reduced power during the night, since the heat necessary for heating the edges is sufficient if only half or one third of the luminous power is emitted. For this purpose, switching devices may be provided, dimmers for the fluorescent tubes or clock circuits or circuits in which only a part of the LED lighting element is in operation. Further details of the invention will be described with reference to the drawings.

Figures 1 and 2 show in an enlarged detail different arrangements of LED luminaries in the space between the angelseitigen ends of the doors of a goods display cabinet with vertical access opening, FIG. 3 shows the mounting and fastening of a lighting device according to the invention in a vertical access opening refrigerated cabinet;

Figure 4 shows a similar embodiment as in Figures 1 and

2, but with fluorescent tube,

FIGS. 5 and 6 show the arrangement of an encapsulated fluorescent tube within the refrigerated cabinet in elevation and in plan,

FIG. 7 shows details of the coated fluorescent tube,

FIG. 8 shows details of a lighting device with encased LED filament,

FIG. 9 shows the LED illumination device according to the invention for a clear-bordered freezer cabinet;

FIG. 10 shows a circuit board with LED luminaires and associated electronics,

Figure 11 shows a commercial LED lighting device, as well

FIG. 12 shows an embodiment according to FIG. 9 in enlarged form

Representation in which the LED lighting device is directly connected to a functional part of the refrigerator.

FIGS. 1 and 2 show, in detail and on an enlarged scale, the adjoining regions of the angel-side ends 51 of the doors 5 of a goods display cabinet with a vertical access opening to the laundry. renraum. Such doors are described in detail in co-pending patent application EP 08160330.0 of the same Applicant. These two doors 5 are arranged so that a gap 4 is formed, which represents a connection of the goods space with the space surrounding the goods display furniture. In Figure 1, the pivot pins 6 are arranged centrally to the door formed from the discs 5 ^' , while in Figure 2, an off-center arrangement is provided, wherein the pivot pins 6 are arranged on the goods space side. The doors 5 are frameless, ie they each consist of a conventional insulating glass pane, between the discs 5 ^'is a spacer bar is arranged to close the cavity and the edge 52 of the door 5 forms. The arrangement of the pivot pin 6 is arbitrary. They could also be arranged eccentrically on the ambient space side. They must be arranged in any case so that the door can be opened easily, at least at a 90-degree angle and in the closed position, the gap 4 is closed.

In this space 4, a lighting device is arranged, which consists of a luminous element 1 - here in the form of an LED filament - with a lens 11. filament 1 and lens 1 1 are held by a support member 2, which via a heat dissipation 3 with a heat sink 31 is connected.

Carrier part 2, heat dissipation 3 and heat sink 31 are expediently combined in a profile which extends through the intermediate space 4 from the goods space to the surrounding space. This summary creates a functional part of the refrigerator, through which an effective heat dissipation is given, since contact resistances omitted from one component to another. In contrast to Figure 1, the heat dissipation in the embodiment of Figure 2 is significantly shortened, so that the LED illuminant comes to rest with the lens 1 1 in the space 4. The heat sink 31 is simultaneously formed as a stop for the doors 5 in the closed position. Thus, the swing doors 5 are each in their closed position fixed, and it is transferred from the heat sink 31 heat to the window edge. To seal the goods space against the gap 4 and the environment, a seal 7 is provided, which is arranged on the fishing-side end 51 of the door 5 parallel to the edge 52. If the swing door 5 is closed, this seal 7 applies to the carrier part 2 and thus seals the goods space against the heat dissipation device.

In the generation of the LED light creates a fairly large process heat, which is why the LED lights require cooling, which is usually located immediately behind the luminous element. As shown in detail in FIGS. 10 and 11, the LED luminous body consists of the light-emitting diodes 1, which are arranged with the associated electronics 101 on a circuit board 100. The individual boards are connected to each other via solder joints 102 and connected directly to a heat sink 31. Although these commercially available LED lights are available in any desired length, they are often difficult to install. According to the invention, the LED luminous body 1 should be arranged within the goods compartment. In order to bring the heat from the luminous element 1, which is arranged within the goods space, to the outside, therefore, a heat dissipation 3 is provided, which connects directly to the board 100 with the LED illuminants 1 supporting support part 2 and thus the heat to the outside transfers to the heat sink 31. As a result of this separation between the heat sink 31 and the luminous element 1, an extremely energy-saving lighting device is created, since the full light intensity is radiated directly into the goods space, while the resulting heat is dissipated to the outside. Since the LED light is cold, emanating from this no radiation, which could heat the goods to be refrigerated or the goods room.

In the embodiment according to FIG. 1, the heat dissipation 3 is arranged in the intermediate space 4 in each case opposite the edges 52 of the doors 5. This has the advantage that over this heat dissipation 3 heat is radiated against the edges 52 and they are heated, so that fogging the Washers 5 ^' from the edge 52 ago is avoided. This danger is particularly due to the cavity of the insulating glass pane 5 ^' closing and the edge 52 forming spacer strips, which usually consist of a metal profile and thus form a cold bridge. The heat dissipation 3 is the remaining heat from the heat sink 31, which projects into the surrounding space.

In the embodiment according to FIG. 2, a heat-conducting seal 71 is arranged on the heat sink 31, via which heat is transmitted through the contact in the closed position to the angel-side ends 51 of the pane 5 ^" , in order to fog it up 2, the disks 5 ^' project over the edge 52 at their angel end.To protect the edge 52, this space is closed with an edge filling 53, preferably made of plastic.

The lighting device is preferably designed as a modular unit and can be easily inserted into the intermediate space 4. The electrical connection via cable plug (not shown), the holder via a retaining pin 74 which engages in the bore 73 of the magnet holder 72. The LED illuminant 1 is covered with a lens 1 1 and connected via a heat dissipation 3 (not shown) to the heat sink 31, which is formed to a cover 13 at its end, so that covered with the closed position of the doors of the gap 4 is. Again, as described above, cover profile 13, heat sink 31 and 3 Wärmeabieiter be summarized with the support part 2 to a functional part of the cabinet, where the LED lighting elements 1 are directly attached. Furthermore, this functional part can be formed simultaneously as a support and thus contribute to the stiffening and sustainability of the refrigerator.

FIG. 4 shows another embodiment in which a fluorescent tube 1 is provided as a luminous element instead of an LED luminous element. This fluorescent tube 1 is associated with a heat dissipation device, which is arranged is that the heat generated by the fluorescent tube 1 is discharged outside the goods compartment. It has a sheath tube 12 which surrounds the fluorescent tube 1 at a distance, so that between the sheath tube 12 and the fluorescent tube 1, a gap is formed, which is used as an air channel 33. In order to prevent the UV radiation of the fluorescent tube 1 in the goods space, the jacket tube 12 is provided on this side with a filter 122, while the rear, the environment space side facing is formed as a reflector 121. The jacket tube 12 has a lower inlet air opening 123 and an upper exhaust opening 124 (FIG. 5). Through these two openings creates a chimney effect, so that an air flow in the air duct 33 is formed, which conveys the heat from the tube up to the exhaust port 124, where it exits into the ambient space. Thus, a direct lighting in the goods space is possible without the heat generated by the lamp 1 heat reaches the goods room, but is transported to the outside.

This lighting device can be arranged both in the intermediate space 4 and within the goods space, for example in the corner to the side wall 62, where no gap 4 between two angelseitigen ends 51 of the doors 5 is formed, as is apparent from Figures 5 and 6. In the elevational view of Figure 5, the left door 5 has been omitted to allow the view of the shelves 64 and the casing tube 12. Incidentally, the jacket tube 12 can also be arranged to be rotatable so that the angle of illumination can be adjusted as required.

According to FIG. 8, instead of the fluorescent tube, an LED lighting element 1 can also be used. Since this produces no UV radiation, it is sufficient if the usual lens 1 1 covers the LED lamp 1, while the heat dissipation device is surrounded with the air duct 33 to dissipate the heat generated there. For this purpose, the sheathing tube 12 is suitably formed by a U-shaped profile 15, which is completed by the support member 2, on which the lens 11 is placed. This version The shape of the support can be arranged both as a separate lighting device directly in the goods compartment and in the intermediate space 4. However, as shown in Fig. 5, it is necessary to provide an inlet air opening 123 and an exhaust opening 124, respectively, to convey the heat to the ambient space.

Both the heat dissipation device according to FIGS. 1 to 4 and also according to FIG. 8 can additionally be designed as a support and thus contribute to its stiffening and additional load capacity as a functional part of the refrigerated cabinet.

As already mentioned above, it is expedient not only to dissipate the heat generated by the luminous bodies 1, but also to use them. Thus, the usually inserted into the edges 52 heating wires 34 can be omitted. The additional energy is saved, since the waste heat of the luminous body 1 is used for heating the edges 52 and the fishing-side ends 51 of the doors 5. By inserting a so-called "heat pipe" 32 into the edge 52, which then surrounds the disk on all sides, all areas of the door 5 endangered by the fog are reached .. Since heating of these edges 52 is also necessary at night, it is necessary for the lighting to be too remains lit at night to provide heat for heating the edges 52 instead of the failed heater wires 34. However, it has been found that the waste heat from reduced illumination is sufficient to prevent the door 5 from fogging up at the edges 52. So it would be It does not make sense to keep the full-intensity lighting burning at night.

Therefore, according to the invention, a switching device is provided which, for example, has a dimmer with which the fluorescent tubes can be switched to reduced power. It is also possible, the switching device in such a way that in time the lighting is turned on and off in full strength, but only for one third or half of the time emits light output. Even so, sufficient heating of the can- 52 can be achieved. However, this switching on and off is only suitable for LED luminaires. In a preferred embodiment, the LED lights are divided into two circuits, at night, then only one of the two circuits remains switched on, so that only every second or third LED lighting emits heat at night lighting.

The invention is not only applicable to goods display furniture having a vertical access opening to the goods compartment, which is divided into vertically stacked compartments 64 and closed with transparent, horizontally movable doors 5. Figure 9 shows a further embodiment of the invention in a goods display cabinet in the manner of a freezer, which has over the freezer door opening to open the same sliding cover plates and attached to the furniture transparent border 54 which serves as a support of a lighting device for illuminating the cold room. As described in detail in the earlier patent application EP 1 686 336 A2, a basic profile 14, which is provided for accommodating various modular parts, which serve to furnish the cover, extends over the length of the freezer. Among other things, this basic profile 14 is also a carrier of a lighting device. As a rule, in this embodiment, the illumination device is arranged outside the goods space in order to avoid the development of heat and also the outgoing of the fluorescent tube UV rays on the goods to be cooled in the goods compartment. According to the invention, however, a lighting device is installed within the goods space, which is equipped with an LED lamp 1 and a lens 11, both of which are fastened to the support part 2, which in turn is attached to the base profile 14. On the base profile 14 of the handrail 75 is further attached and guide rails 76 which carry the covers 77 and 78. The base profile 14 is designed as a heat dissipation device and therefore consists of a thermally conductive material, such as aluminum. For a good heat transfer to the edge 52 of the border 54, the base profile 14 is expediently placed directly on the window surround 55 of the border 54. It extends from the inside of the Renraumes on the outside of the border 54, so that the process heat generated by the luminous body 1 is derived from the goods space to the outside. Since the base profile 14 surrounds the border 54, this gives off its heat to the edge 52 of the border 54, so that the border 54 consisting of an insulating glass pane with a pane border 55 is heated in this area. The usual heating wires 34 can be omitted. The energy for heating these heating wires is saved.

For simplification and because of the better heat dissipation, the carrier part 2 can be combined with the basic profile 14 to form a functional part. Figure 12 shows such an embodiment in which the heating wire 34 is omitted. The base profile 141 has a surface 22 which receives the circuit board 100 with the luminous bodies 1 directly. Further, holders 21 are provided to attach the lens 1 1 to cover the LED lamp 1. The base profile 141 thus directly absorbs the heat from the LED luminous bodies 1 and directs them to the edge 52 of the insulating glass pane 54 with the disk enclosure 55. The base profile 141 itself consists of a good heat-conducting material and is formed for example as an aluminum profile, so that a very large cooling surface for the removal of heat generated in the lamps 1 is available. This has a particularly good effect on the life and the luminosity of the LED lamp.

Claims

Patent claims

1. goods display furniture for the presentation of chilled or frozen goods with a goods space which is at least partially enclosed by transparent panes and having an access opening which is closed by transparent movable windows, and the goods space is illuminated by means of a lighting device with at least one luminous element, characterized in that the luminous element (1) of the illumination device is positioned in the goods compartment and an associated heat dissipation device (3, 31, 32, 33, 12, 14) is arranged such that the heat generated by the luminous element (1) is emitted outside the goods compartment.

2. goods display furniture according to claim 1, characterized in that the heat dissipation means (3, 31, 32, 33, 12, 14) in the vicinity of the edges (52) of the goods space enclosing discs (5) is arranged, wherein the heat dissipation device (3, 31, 32, 33, 12, 14) extends along the disk edge (52), so that the heat dissipated by the luminous body (1) heats the disk edge (52).

3. Goods display furniture according to one of claims 1 or 2, characterized in that the heat removal device (3, 31, 32, 33, 12, 14) is designed as a functional part of the refrigerated cabinet.

4. Goods display furniture according to one or more of claims 1 to 3 with a vertical access opening to the goods compartment, which is divided into vertically stacked compartments, and the customer accessible front of the goods compartment with transparent, horizontally movable doors (5) is closed, characterized in that between the angel-side ends (51) of the doors (5) an intermediate space (4) is provided, in the region of which the luminous bodies (1) of the illumination device are arranged so as to communicate directly with the goods space, while the heat emitted by the luminous bodies (1) is absorbed by the heat removal device (3, 31, 32, 33) is conveyed through the intermediate space (4) to the outside.

5. goods display furniture according to one or more of claims 1 to 4, characterized in that the lighting device LED luminous body (1), which are positioned in the goods space and to the LED illuminants (1) associated heat dissipation device (3) and a heat sink (31), wherein the LED illuminant (1) and the heat sink (31) via the heat dissipation (3) are interconnected.

6. Goods display furniture according to one or more of claims 1 to 5, characterized in that the heat dissipation (3) extends along the disk edge (52), so that the heat dissipated by the heat dissipation (3) heated the disk edge (52).

7. goods display furniture according to one or more of claims 1 to 6, characterized in that the cooling body (31) is formed as a profile which extends over the length of the window edge (52).

8. Goods display furniture according to one or more of claims 1 to 7, characterized in that the heat sink profile (31) with the door closed (5) covers the intermediate space (4) between the two adjacent doors (5).

9. Goods display furniture according to one of claims 7 or 8, characterized in that the carrier part (2) for the LED lights, the Wärmeabieiter (3) and the heat sink (31) are combined to form a functional part of the cooling cabinet, to which the LED lighting elements 1 are directly attached.

10. Goods display furniture according to one or more of claims 4 to 9, characterized in that the carrier part (2) projects into the goods space and the Wärmeabieiter (3) through the intermediate space (4) between the two adjacent doors (5) is passed, and the heat sink (31) is arranged at the end outside the goods space.

11. Goods display furniture according to one or more of claims 4 to 10, characterized in that the cooling body (31) as a stop for the disc (5 ^' ) of the door (5) is formed.

12. Goods display furniture according to one or more of claims 4 to 1 1, characterized in that between the support part (2) and the goods in the space pivoting angelseitigen end (51) of the door (5) a seal (7) is arranged.

13. Goods display furniture according to claim 12, characterized in that the seal (7) is attached to the fishing-side end (51) of the door (5).

14. Goods display furniture according to one or more of claims 1 to 4, 6 to 8 and 12 and 13, characterized in that the illumination device as a luminous body has a vertically positioned fluorescent tube (1) which is arranged in the goods space, and an associated heat dissipation device (12 , 121, 122, 123, 144).

15. Goods display furniture according to claim 14, characterized in that the associated heat dissipation device from a Fluorescent tube (1) in the distance comprehensive jacket tube (12), which includes a filter (122).

16. goods display furniture according to one of claims 14 or 15, characterized in that the associated heat dissipation device (33) consists of a fluorescent tube (1) at a distance comprehensive jacket tube (12) which includes a reflector (121).

17. Goods display furniture according to one or more of claims 14 to 16, characterized in that the through the jacket (12) of the fluorescent tube (1) resulting air passage (33) has a supply air opening (123) at the lower end and an exhaust port (124) at the top End has, so that the resulting heat is dissipated by an air flow.

18. Goods display furniture according to one or more of claims 14 to 17, characterized in that the illumination device has LED lighting element (1) instead of the fluorescent tube.

19. Goods display furniture according to one or more of claims 14 to 18, characterized in that the illumination device in the intermediate space (4) between the angelseitigen ends (51) of the doors (5) is arranged.

20. Goods display furniture according to one or more of claims 14 to 19, characterized in that the edge (52) of the door (5) is equipped with a heating tube (32).

21. Goods display furniture according to one or more of claims 14 to 20, characterized in that the heat dissipation device (3, 12, 15, 33) formed as a support and thus is a functional part of the refrigerated cabinet.

22. Goods display furniture according to one or more of claims 1 to 3 and 5 to 20 in the manner of a freezer, which above the freezer door opening to open the same displaceable cover plates and a fixed on the furniture, transparent border (54), as the carrier of a lighting device for Illumination of the cold room is used and a extending over the length of the freezer base profile (14) for receiving various modular parts, characterized in that on the base profile (14) projecting into the goods space LED luminous body (1) are arranged.

23, goods display furniture according to claim 222, characterized in that the of a board (100) carried LED lamp (1) are attached directly to the base profile (141).

24. Goods display furniture according to one of claims 22 or 23, characterized in that the base profile (141) consists of a thermally conductive material and the disk edge (52) of the border (54) surrounds so that the disk edge (52) is heated.

25. Goods display furniture according to one or more of claims 22 to 24, characterized in that the base profile (141) has a surface (22) for receiving the board (100) with the LED lighting elements (1) and holder (21) for fixing the Lens (11).

26, goods display furniture according to one or more of claims 1 to 25, characterized in that a switching device is provided, which reduces the light output of the luminous element (1) for night operation.

27. Goods display furniture according to claim 26, characterized in that a dimming device of the fluorescent tube (1) is associated.

28, goods display furniture according to claim 26, characterized in that a part of the LED lighting element (1) can be switched off.

29, goods display furniture according to claim 26, characterized in that the LED luminous bodies are cyclically switchable.