EP2421414B1 - Led lighting device for refrigerated display case - Google Patents

Led lighting device for refrigerated display case Download PDF

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Publication number
EP2421414B1
EP2421414B1 EP10716819.7A EP10716819A EP2421414B1 EP 2421414 B1 EP2421414 B1 EP 2421414B1 EP 10716819 A EP10716819 A EP 10716819A EP 2421414 B1 EP2421414 B1 EP 2421414B1
Authority
EP
European Patent Office
Prior art keywords
led
leds
light
led light
refrigerated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP10716819.7A
Other languages
German (de)
French (fr)
Other versions
EP2421414A1 (en
Inventor
Christian Derkits
Christoph Platzer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tridonic Jennersdorf GmbH
Original Assignee
Tridonic Jennersdorf GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tridonic Jennersdorf GmbH filed Critical Tridonic Jennersdorf GmbH
Publication of EP2421414A1 publication Critical patent/EP2421414A1/en
Application granted granted Critical
Publication of EP2421414B1 publication Critical patent/EP2421414B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47F—SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
    • A47F11/00—Arrangements in shop windows, shop floors or show cases
    • A47F11/06—Means for bringing about special optical effects
    • A47F11/10—Arrangements of light sources
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47F—SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
    • A47F3/00—Show cases or show cabinets
    • A47F3/001—Devices for lighting, humidifying, heating, ventilation
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47F—SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
    • A47F3/00—Show cases or show cabinets
    • A47F3/04—Show cases or show cabinets air-conditioned, refrigerated
    • A47F3/0482—Details common to both closed and open types
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D27/00—Lighting arrangements
    • F25D27/005—Lighting arrangements combined with control means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
    • F21V23/0442—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/40—Lighting for industrial, commercial, recreational or military use
    • F21W2131/405—Lighting for industrial, commercial, recreational or military use for shop-windows or displays
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2327/00—Lighting arrangements not provided for in other groups of this subclass
    • F25D2327/001—Lighting arrangements on the external side of the refrigerator, freezer or cooling box
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/06—Sensors detecting the presence of a product
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/008—Alarm devices

Definitions

  • the invention relates to the use of LED-based lighting in the field of refrigerated display cabinets, i. Refrigerated shelves, in particular multi-storey refrigerated shelves according to the preamble of patent claim 1.
  • EP 083 7439 A2 shows an electronic price tag with a LED lighting.
  • the LED lighting is located on the front of the price tag and has the task of alerting the customer to the price tag.
  • the price tag may also include a button in which the LED may be located. An employee can manually activate an LED by pressing the key. Alternatively, a central control unit can automatically turn on and off the LED lighting.
  • US 2008 0062 680 A1 shows an LED module that can be used as a direct replacement of a fluorescent tube.
  • the module has all the necessary electrical components. These are in particular components for the correct control of the LEDs.
  • the module has conventional fluorescent tube connections. It is used a variety of LEDs, which are mounted close together in the tube and have different beam angles.
  • WO 2006/126114 A1 shows an indirect lighting system for an object, such as a shelf.
  • the lighting system is a linear array of LEDs.
  • a complex shaped reflector is arranged so as to direct light emitted from the LEDs in a direction away from the object and towards the reflector in a homogeneous manner to the object, so that the object only by indirect lighting is illuminated.
  • the complex reflector achieves a concentration of light rays. This light concentration is aligned so that the light reflected by the reflector emits light through a narrow slit on the shelf. Due to the LED away from the object to be illuminated and the complex reflector to be aligned to the manufacture of the lighting system and its retrofitting in an object, such as a shelf, very complex.
  • red, green, and / or blue LEDs can be used to produce monochromatic, white, or other colored, mixed light.
  • the LED may be provided with a photoluminescent material disposed over the LED chip, such as fluorescent dye or phosphor (for example, YAG, BOSE) be provided, by means of which the light emitted by the LED chip and the light converted in the photoluminescent material light are mixed together so that any desired color or white light (eg. By means of blue LED ) can be generated. It is also possible any combination of the aforementioned LEDs in the LED lighting.
  • the invention relates to an LED lighting for the field of refrigerated display cabinets, in particular of refrigerated shelves.
  • it has a plurality of LEDs for illuminating the sales furniture.
  • at least a part of the LEDs of the LED lighting as at least one linear LED unit, for example as a wall washer ("Wall Washer") is formed, and the at least one linear LED unit in the upper part of the refrigerated display cabinets , in particular below the upper cover of the refrigerated shelf, is attached.
  • the linear LED unit is preferably limited in its radiation characteristic to a certain angle and can be an asymmetric Have light distribution.
  • the asymmetric radiation characteristic of the linear LED unit can be realized by means of an asymmetrical lens designed for this purpose.
  • the particular angle preferably has 30 °.
  • the light intensity distribution is preferably asymmetric in that more light is emitted to the lower chiller shelves further away from the upper chiller shelves closer to the linear LED unit.
  • the invention relates to an LED lighting for refrigerated display cabinets, in particular of refrigerators, which has a plurality of LEDs (4,9) for illuminating the display units. It is further characterized in that at least a part of the LEDs of the LED lighting as at least one linear LED unit, for example, as a wall washer, is formed, which is mounted in a horizontal and / or vertical plane decentralized, preferably at the edge, in the display cabinet, and generates an even spatial light intensity distribution via an asymmetrical light intensity distribution.
  • the asymmetric radiation characteristic of the linear LED unit can be realized by means of an asymmetrical lens designed for this purpose.
  • the luminous intensity distribution is preferably asymmetric in that increased light on the areas of the sales area in the refrigeration cabinets, which are located farther away from the linear LED unit compared to the Areas that are closer to the linear LED unit is broadcast.
  • the lens comprises: at least one far-range directing surface, by means of which the light is directed to a distant area with respect to the linear LED unit, and at least one near-range directing surface, by means of which the light is directed to a closer range with respect to the linear LED unit , In this way, an asymmetric radiation characteristic can be easily achieved.
  • different areas of the lens are assigned LEDs with different light intensity and / or color.
  • each individual area of the display cabinet can be illuminated individually, while maintaining a homogeneous lighting.
  • the color characteristic of the linear LED unit can be adjustable, in particular as a function of the present product groups.
  • the linear LED unit is embodied asymmetrically in terms of its emission characteristic horizontally and / or vertically with respect to its color characteristic.
  • the LED lighting preferably has a high color rendering index in order to make the typical printings of the packages of the goods present in the cooling rack appear brilliant.
  • a consumer-promoting lighting can be created.
  • the cooling shelf is preferably used as a heat sink for the LED lighting.
  • the display cabinet can be designed as a refrigerator.
  • the LED unit is preferably attached to the inside of the door frame of the refrigerator.
  • the invention relates to LED modules, which consist of at least part of the LEDs of the LED lighting.
  • the LED modules are integrated into the price tags of the sales furniture, the price tags are attached to the refrigerated display furniture.
  • the LED modules integrated in the price tags are each assigned to one level of the cooling rack.
  • the luminous intensity distribution of the LED modules may be asymmetrical in that increased light is emitted to the products further away in the respective cooling shelf in comparison to products which are located closer to the LED modules.
  • the color characteristic of the LED modules can be adjustable, in particular depending on the present product groups.
  • the LED modules have an asymmetrical color characteristic in their radiation characteristic horizontally and / or vertically, so that different groups of goods can be irradiated with light of different color.
  • the price tags may be electronic price tags, for example LCD based.
  • the electronic price tags can be controlled centrally.
  • At least part of the emitted light of the LED modules shines away from the display cabinet. In this way, attention can be drawn to the price tags.
  • the price tags can therefore be highlighted for special offers or for a specific customer behavior, for example by means of the separate LED of the LED module.
  • the LED lighting preferably has a central control unit and a sensor, wherein the sensor monitors the goods level of the display cabinet and reports to the central control unit when the level is empty.
  • the invention relates to a system comprising at least one LED illumination as described above.
  • Fig. 1 an embodiment of an LED arrangement according to the invention is shown. This is in a cooling rack 1 attached.
  • the cooling rack has five floors, which are realized by the insertion of four compartments 2.
  • the cooling shelf is limited by a cover 7.
  • a linear LED unit 3 is attached.
  • the latter may be a so-called wall washer ("wall washer").
  • the linear LED unit has a plurality of LEDs 4. These are arranged horizontally along the front of the shelf. It is also possible to place LEDs side by side, as in this embodiment, three are indicated side by side, so as to increase the intensity and / or the beam angle.
  • the LEDs may have different colors, preferably red, green and blue or blue and red. As a result, monochromatic light or even a very wide range of color spectra can be achieved by mixing the emitted light with suitable means, for example with a diffusing screen.
  • the LED may be provided with a photoluminescent material arranged above the LED chip, such as, for example, fluorescent dye or phosphor (for example YAG, BOSE). By means of this phosphor layer, the light emitted by the LED chip and the light converted in the photoluminescent material can be mixed with one another in such a way that any desired color or white light (for example by means of a blue LED) can be produced.
  • a photoluminescent material arranged above the LED chip, such as, for example, fluorescent dye or phosphor (for example YAG, BOSE).
  • the linear LED unit is limited in its emission characteristics to a certain angle, for example 30 °. Thus, the light is completely bundled on the goods offered and achieved a high lighting efficiency.
  • an asymmetrical distribution of light intensity ensures uniform illumination of the goods on all floors. Namely, light is increasingly radiated to the lower-level lower shelves as compared with the upper shelves closer to the linear LED unit. This is symbolized here by the length of the arrows 6, wherein the length reflects the light intensity.
  • an asymmetrical lens 20 can be placed in front of the LED illumination in the direction of emission.
  • a cross section of such a lens 20 is exemplified in FIG Fig. 2 shown.
  • the lens 20 is made of a clear, clear or matt, colorless or colored material.
  • the lens 20 is made of glass, but preferably of plastic, such as polymethylmethacrylate (PMMA).
  • the lens 20 is placed in front of the LED unit 3 in such a way that the latter in the in Fig. 2 shown lower Recess is arranged and radiates in the direction of the lens 20.
  • three LEDs eg RGB LEDs
  • the lens 20 preferably has a far-range-directing surface 21 and a near-area-directing surface 22.
  • the far-range directing surface 21 is preferably as shown in FIG Fig. 2 shown in a left or right (with respect to a cross section of the lens 20 transversely to its longitudinal extent; Fig. 3 ) upper area. It is preferably formed according to the desired emission direction and light intensity, preferably angled accordingly.
  • the near-area-directing surface 22 is preferably as shown in FIG Fig. 2 shown in a right or left (with respect to a cross section of the lens 20 transversely to its longitudinal extent; Fig. 3 ) upper area and is preferably arranged adjacent to the far-range directing surface 21 and is particularly preferably in this over.
  • the near-area-directing surface 22 is preferably formed according to the desired emission direction and light intensity, preferably it has a corresponding convex shape.
  • the light emitted by the LEDs thus falls on the lens 20, more precisely on the far-range directing surface 21 and the near-field-directing surface 22. Due to the special, asymmetrical design of the lens 20, the light is directed to the particular display cabinet or cabinet according to the shape of the lens 20 The goods offered therein are steered. Thus, a high lighting efficiency is achieved. Due to the asymmetrical light intensity distribution, a uniform illumination of the goods in all floors and compartments 2 is also achieved.
  • the lens 20 according to the exemplary embodiment in each case has a far-range-directing surface 21 and a near-area-directing surface 22. These can be designed such that they achieve a high illumination efficiency with uniform illumination in different areas.
  • the lens 20 has a plurality of far-range-directing surfaces and / or several near-area-directing surfaces for achieving a homogeneous illumination of goods distributed over all floors and also in all areas of the compartments 2.
  • the far-range directing surface 21 is configured to focus and direct the light so that more distant regions have the same light intensity distribution as nearer regions to which the light is directed by the near-surface-directing surface 22 .
  • the far-range-directing surface 21 and the near-area-directing surface 22 associated with different LEDs.
  • an asymmetrical emission characteristic can be achieved by assigning the far-range-directing surface 21 stronger LEDs (ie LEDs with high light intensity) than the near-range-guiding surface 22 (ie LEDs with weaker light intensity). In this way, there is consequently a homogeneous illumination of the goods or compartments 2.
  • individual and desired areas corresponding areas in the subjects 2 and or floors with different color characteristics can be illuminated, while at the same time a homogeneous lighting of all areas of the display cabinet remains guaranteed.
  • Fig. 3 shows the in Fig. 2 shown lens 20 installed in a linear LED unit according to the invention 3.
  • the LED unit 3 is preferably arranged in a profile or base profile 18.
  • the base profile 18 is preferably thermally connected, for example via a separate cooling plate or on the sales furniture itself to ensure a corresponding heat dissipation.
  • the asymmetrical lens 20 is placed on the base profile 18 and in the emission direction in front of the linearly arranged LEDs.
  • the lens 20 is preferably with the Base profile 18 securely connected by screwing, clamping, a latching mechanism or the like.
  • the lens 20 extends over the entire base profile width and length.
  • the lens 20 may only partially cover the base profile 18 or the LED unit 3 as long as it is at least partially arranged in the emission direction in front of the linearly arranged LEDs. It is also conceivable that the lens 20 is partially asymmetrical and partially symmetrical in the longitudinal direction. Furthermore, the asymmetrical lens profile in the longitudinal direction, ie over the length of the base profile 18 and the LED unit 3 according to the desired radiation characteristic change.
  • LEDs can be used over the entire length of the LED unit.
  • differently strong (with different light intensity) or differently colored LEDs can be used according to the lens shape to individually achieve homogeneous illumination with freely selectable color characteristics.
  • goods in an upper compartment on the left side can be illuminated differently than other goods on the corresponding left side, and also differently than goods in other areas of the display cabinet, but homogeneous illumination can be maintained.
  • RGB LEDs the color can also be changed individually at any time.
  • the invention is not limited to a particular combination limited by LEDs to corresponding lens areas both in the longitudinal and in the transverse direction of the LED unit 3.
  • the LED unit 3 with lens 20 and base profile 18 is preferably arranged and fastened at its end faces between two end caps 19.
  • the LED unit 3 between the end caps 19 is pivotable about its longitudinal axis or rotatably arranged. In this case, it can be designed so that by rotating through 180 °, the asymmetric radiation characteristic of the LED unit 3 is mirror-inverted. As a result, an LED unit 3 can be used by simply turning both left and right as well as up and down in the display cabinet.
  • the base profile 18 is rigidly connected to the end caps 19, and the lens 20 is arranged on the base profile 18 in a pivotable manner. In this way, the LED unit 3 can be aligned by pivoting the unit even after their attachment according to the location.
  • the end caps 19 in turn preferably have a mounting flange 19a, with which the LED unit 3 can be attached.
  • the flange 19a can be snapped into a latching device or holes or holes 19b, preferably elongated holes, in the flange 19a by means of fastening means, such as screws, are attached.
  • the connection cable for the LED unit 3 can be led away from the front or to the rear, preferably via an end cap 19.
  • Fig. 4 shows by way of example a polar diagram for the luminous intensity distribution [cd / klm] of an LED unit Symmetrical radiation characteristic S and with asymmetric radiation characteristic A.
  • the diagram shows that the LED unit with symmetrical radiation characteristic or lens uniform distribution of light intensity (eg. Approximately 500 cd / klm in Fig. 4 ) has a caused by the LED array radiation angle of for example 90 °.
  • the radiated light is focused by its design in an emission angle of approximately 20 to 40 °, preferably 30 °.
  • the light intensity is distributed in such a way that it is higher in desired regions (eg approx.
  • the light intensity distribution can be determined individually according to the place of use by the shape of the lens 20; in Fig. 4 For example, an approximately linear course is shown.
  • the price tags 5 of the goods offered are realized as electronic LCD displays.
  • Fig. 5 shows a detailed view of a price tag 5.
  • the price tag 5 has an LCD display 8.
  • the ad can be any other electronic ad.
  • LED module 11 On the back of the price tag is an LED module 11. On this, three LEDs 4 are indicated, the have a different emission direction. Of course, the LED module may also include more or fewer LEDs. Again, the LEDs are aligned so that products are illuminated more brightly in the distance than those in the vicinity. This is symbolized by the length of the arrows 6. As a result, a uniform brightness of the entire display of the shelf is achieved.
  • At least one additional LED 9 is mounted on the same side as the LCD display. This has the function to increase the attention of the customer to the ad. For example, special prices can be highlighted. It is also conceivable that the business implementing the invention carries out a customer identification and registers the buying behavior of the identified customers. In this way, products that potentially correspond to the buying behavior of a customer in business can be highlighted. Of course, other ways of highlighting are conceivable. For example, the display may have a conspicuous signaling in this case.
  • the LED lighting can have one or more light sensors 10. This can be designed to detect the ambient light and to compensate for the illumination caused by the LED lighting. In addition, it is possible that he recorded the goods level of the sales cabinet. In this way, the responsible employees of the store can be informed that, for example, a certain product is no longer available in the store, or that a particular shelf is empty.
  • the color characteristic of the LED lighting is adjustable, in particular depending on the present product groups. For this purpose, as already mentioned, it has differently colored LEDs. In addition, the color characteristic can be varied locally. This ensures that different groups of goods can be irradiated with light of different colors.
  • a particularly high color rendering index is achieved in order to make the typical printings of the packaging of the goods present in the cooling rack appear brilliant.
  • a special attractiveness of the products is achieved by ensuring a high color rendering index.
  • the color temperature can be adapted to the respective product. For example, with meat, special support of redness can be achieved by setting the color temperature to a lower level. This can be achieved by operating the red LEDs more strongly.
  • a further advantage according to the invention results from the fact that the LEDs are automatically cooled by being attached to the cooling rack by the cold emitted by the latter. As a result, they have optimum luminous efficiency. Furthermore, the surface of the refrigerated shelf on which the LED lighting is mounted, serve as a heat sink. This can additionally still by be promoted that the LED lighting is mounted on a heat sink. This can either be an integral part of the refrigerator shelf. However, it can also be a separate panel between LED lighting and cooling rack.
  • the LED lighting has electronics for driving and controlling the LEDs so that they can be operated correctly.
  • a control electronics is designed so that the LED lighting on conventional power supply, such as. 12V DC or AC mains voltage, can be connected.
  • the linear LED lighting unit may provide connections for conventional lamp sockets, such as e.g. of fluorescent tubes.
  • the electronics are preferably integrated in the LED lighting, but can also be housed separately in the cooling rack or otherwise.
  • a plurality of supply conductors can be used, wherein the LEDs can be operated to different degrees, for example by means of pulse width modulation and / or by means of the drive current.
  • FIG. 6a and 6b a further embodiment of an LED array according to the invention is shown in a refrigerator.
  • Fig. 6a shows the fridge from the front, while Fig. 6b represents a top view.
  • the refrigerator has three doors 16. These are mounted on the door frame 17. On the door frame LED lights are mounted on the inside. These can be designed as linear LED units 3. The linear LED units are vertically aligned. Alternatively, one or more LED modules can be mounted on the inside of the door frame.
  • the linear LED units 3 at the corners left and right of the refrigerator have an asymmetric radiation characteristic, as for example, in the polar diagram in Fig. 4 is shown. This can compensate for the problem that they are mounted decentralized in the horizontal plane in the refrigerator, ie that they illuminate the room from a decentralized position. Due to the asymmetrical radiation characteristic of the sales area, that is, here the individual shelves, in the areas of more distant from the linear LED units 3 areas illuminated more than the closer. As a result, despite the decentralized position of the linear LED units 3, a uniform illumination of the refrigerated shelves can be achieved. Their emission angle is preferably 30 °.
  • an asymmetric lens such as the lens in Fig. 2
  • the lens are placed in front of the LED illumination in the beam direction in order to achieve an asymmetrical emission characteristic.
  • the lens preferably has an elongate shape corresponding to the LED unit.
  • the lens is rotatable about its longitudinal axis.
  • it can be designed so that by rotating through 180 °, the asymmetric radiation characteristic of the LED unit 3 is mirror-inverted.
  • an LED unit 3 can be used by simply turning its lens both left and right in the refrigerator.
  • Fig. 7 schematically a possible system 12 for illumination, information and monitoring of display furniture is shown.
  • the system has a central control unit 13. This is responsible for the display on the LCD displays 8, for the illumination by means of the LED illumination en 11 and for the detection of the goods level by means of the sensors 10.
  • a plurality of LEDs 11 or LED arrays, a plurality of LCD displays 8 and a plurality of light sensors 10 are connected via a bus 14 to the central control unit 13.
  • the central control unit may be, for example, a computer located in the business office.
  • the lighting in all the sales furniture of the business for example a plurality of refrigerated shelves, centrally controlled in accordance with the invention.
  • the level of goods can be monitored centrally.
  • a price or other information about a product can be changed from a central location.
  • the invention is by no means limited to refrigerated shelves alone.
  • the invention may as well be used in other refrigerated or uncooled display cabinets, such as freezers or uncooled shelves.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Freezers Or Refrigerated Showcases (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Description

Die Erfindung betrifft die Anwendung von LED-basierten Beleuchtungen im Bereich von gekühlten Verkaufsmöbeln, d.h. Kühlregalen, insbesondere mehrstöckigen Kühlregalen gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to the use of LED-based lighting in the field of refrigerated display cabinets, i. Refrigerated shelves, in particular multi-storey refrigerated shelves according to the preamble of patent claim 1.

Supermärkte und andere Geschäfte weisen zumeist eine zentrale Beleuchtung der Verkaufsmöbel auf. Dies wirkt sich negativ auf die Präsentation der angebotenen Waren aus. In anderen Fällen weisen die Verkaufsregale zwar eine eigene Beleuchtung auf, die jedoch aus Halogenleuchten oder Leuchtstofflampen besteht. Diese sind am Regal Rahmen des Regals oder oberhalb der Auslage angebracht und wirken sich negativ auf die zu präsentierenden Güter auf Grund ihrer Wärmeausstrahlung aus. Darüber hinaus weisen sie eine unvorteilhafte Lichteffizienz auf.Supermarkets and other shops usually have a central lighting of the sales furniture. This has a negative effect on the presentation of the goods offered. In other cases, the shelves have their own lighting, but which consists of halogen lights or fluorescent lamps. These are attached to the shelf frame of the shelf or above the display and have a negative effect on the goods to be presented due to their heat radiation. In addition, they have unfavorable light efficiency.

EP 083 7439 A2 zeigt ein elektronisches Preisschild mit einer LED-Beleuchtung. Die LED-Beleuchtung ist auf der Frontseite des Preisschilds angebracht und hat die Aufgabe, den Kunden auf das Preisschild aufmerksam zu machen. Das Preisschild kann außerdem eine Taste aufweisen, in der sich die LED befinden kann. Bei Drücken der Taste durch einen Mitarbeiter kann eine LED manuell aktiviert werden. Alternativ kann eine zentrale Steuereinheit das An- und Ausschalten der LED-Beleuchtung automatisch durchführen. EP 083 7439 A2 shows an electronic price tag with a LED lighting. The LED lighting is located on the front of the price tag and has the task of alerting the customer to the price tag. The price tag may also include a button in which the LED may be located. An employee can manually activate an LED by pressing the key. Alternatively, a central control unit can automatically turn on and off the LED lighting.

US 2008 0062 680 A1 zeigt ein LED-Modul, das als direkter Ersatz einer Leuchtstoffröhre verwendet werden kann. US 2008 0062 680 A1 shows an LED module that can be used as a direct replacement of a fluorescent tube.

Hierfür weist das Modul alle notwendigen elektrischen Bauteile auf. Bei diesen handelt es sich insbesondere um Bauteile zur korrekten Ansteuerung der LEDs. Zur Stromversorgung weist das Modul konventionelle Leuchtstoffröhrenanschlüsse auf. Es wird eine Vielzahl von LEDs eingesetzt, wobei diese dicht nebeneinander in der Röhre angebracht sind und unterschiedliche Ausstrahlwinkel aufweisen.For this purpose, the module has all the necessary electrical components. These are in particular components for the correct control of the LEDs. For power supply, the module has conventional fluorescent tube connections. It is used a variety of LEDs, which are mounted close together in the tube and have different beam angles.

WO 2006/126114 A1 zeigt ein indirektes Beleuchtungssystem für ein Objekt, wie beispielsweise ein Regal. Bei dem Beleuchtungssystem handelt es sich um LEDs die linear angeordnet sind. In der Nähe der LEDs ist ein komplex geformter Reflektor derart angeordnet, um von den LEDs in eine Richtung weg von dem Objekt und hin zu dem Reflektor emittiertes Licht in homogener Weise auf das Objekt zu lenken bzw. zu reflektieren, so dass das Objekt nur durch indirekte Beleuchtung angestrahlt wird. Durch den komplexen Reflektor wird eine Konzentration der Lichtstrahlen erzielt. Diese Lichtkonzentration ist dabei so ausgerichtet, dass das durch den Reflektor reflektierte Licht durch einen schmalen Schlitz auf das Regal strahlt. Aufgrund der vom zu beleuchtenden Objekt weggerichteten LEDs sowie dem dazu auszurichtenden komplexen Reflektor ist die Herstellung des Beleuchtungssystems sowie dessen Nachrüstung in einem Objekt, wie beispielsweise einem Regal, sehr aufwändig. WO 2006/126114 A1 shows an indirect lighting system for an object, such as a shelf. The lighting system is a linear array of LEDs. In the vicinity of the LEDs, a complex shaped reflector is arranged so as to direct light emitted from the LEDs in a direction away from the object and towards the reflector in a homogeneous manner to the object, so that the object only by indirect lighting is illuminated. The complex reflector achieves a concentration of light rays. This light concentration is aligned so that the light reflected by the reflector emits light through a narrow slit on the shelf. Due to the LED away from the object to be illuminated and the complex reflector to be aligned to the manufacture of the lighting system and its retrofitting in an object, such as a shelf, very complex.

Als LEDs können rote, grüne, und/oder blaue LEDs (RGB) oder blaue und rote LEDs zur Erzeugung monochromatischen, weißen oder andersfarbigen, gemischten Lichts eingesetzt werden. Ferner kann die LED mit einer über dem LED-Chip angeordneten photolumineszierendem Material, wie beispielsweise Fluoreszenzfarbstoff oder Leuchtstoff (beispielsweise YAG, BOSE), versehen sein, mittels der das vom LED-Chip abgestrahlte Licht und das in dem photolumineszierendem Material umgewandelte Licht derart miteinander vermischt werden, so dass jede gewünschte Farbe oder weißes Licht (bspw. mittels blauer LED) erzeugt werden kann. Es ist auch jegliche Kombination der vorgenannten LEDs in der LED-Beleuchtung denkbar.
Es ist nun die Aufgabe der Erfindung, ein Beleuchtungssystem für gekühlte Verkaufsmöbel bereitzustellen, das die oben genannten Nachteile zumindest verringert.
Diese Aufgabe wird für eine gattungsgemäße Vorrichtung erfindungsgemäß durch die kennzeichnenden Merkmale des Patentanspruchs 1 oder 4 gelöst. Besonders vorteilhafte Ausführungen der Erfindung sind in den Unteransprüchen beschrieben.As LEDs, red, green, and / or blue LEDs (RGB) or blue and red LEDs can be used to produce monochromatic, white, or other colored, mixed light. Furthermore, the LED may be provided with a photoluminescent material disposed over the LED chip, such as For example, fluorescent dye or phosphor (for example, YAG, BOSE) be provided, by means of which the light emitted by the LED chip and the light converted in the photoluminescent material light are mixed together so that any desired color or white light (eg. By means of blue LED ) can be generated. It is also possible any combination of the aforementioned LEDs in the LED lighting.
It is now the object of the invention to provide a lighting system for refrigerated display cabinets, which at least reduces the above-mentioned disadvantages.
This object is achieved according to the invention for a generic device by the characterizing features of claim 1 or 4. Particularly advantageous embodiments of the invention are described in the subclaims.

Die Erfindung bezieht sich auf eine LED-Beleuchtung für den Bereich von gekühlten Verkaufsmöbeln, insbesondere von Kühlregalen. Dabei weist sie eine Vielzahl von LEDs zur Beleuchtung der Verkaufsmöbel auf. Sie kennzeichnet sich weiterhin dadurch, dass zumindest ein Teil der LEDs der LED-Beleuchtung als mindestens eine lineare LED-Einheit, beispielsweise als Wandfluter ("Wall Washer"), ausgebildet ist und die mindestens eine lineare LED-Einheit im oberen Bereich der gekühlten Verkaufsmöbel, insbesondere unterhalb der oberen Abschlussdecke des Kühlregals, angebracht ist. Die lineare LED-Einheit ist in ihrer Abstrahlcharakteristik vorzugsweise auf einen bestimmten Winkel begrenzt und kann dabei eine asymmetrische Lichtstärkeverteilung aufweisen. Die asymmetrische Abstrahlcharakteristik der linearen LED-Einheit kann über eine dafür ausgelegte asymmetrische Linse realisiert werden.The invention relates to an LED lighting for the field of refrigerated display cabinets, in particular of refrigerated shelves. In this case, it has a plurality of LEDs for illuminating the sales furniture. It is further characterized in that at least a part of the LEDs of the LED lighting as at least one linear LED unit, for example as a wall washer ("Wall Washer") is formed, and the at least one linear LED unit in the upper part of the refrigerated display cabinets , in particular below the upper cover of the refrigerated shelf, is attached. The linear LED unit is preferably limited in its radiation characteristic to a certain angle and can be an asymmetric Have light distribution. The asymmetric radiation characteristic of the linear LED unit can be realized by means of an asymmetrical lens designed for this purpose.

Der bestimmte Winkel weist vorzugsweise 30° auf.The particular angle preferably has 30 °.

Die Lichtstärkeverteilung ist vorzugsweise insofern asymmetrisch, dass verstärkt Licht auf die sich weiter weg befindlichen unteren Kühlregale im Vergleich zu den oberen Kühlregalen ausgestrahlt wird, die sich näher an der linearen LED-Einheit befinden.The light intensity distribution is preferably asymmetric in that more light is emitted to the lower chiller shelves further away from the upper chiller shelves closer to the linear LED unit.

Darüber hinaus bezieht sich die Erfindung auf eine LED-Beleuchtung für gekühlte Verkaufsmöbel, insbesondere von Kühlschränken, die eine Vielzahl von LEDs (4,9) zur Beleuchtung der Verkaufsmöbel aufweist. Sie kennzeichnet sich weiterhin dadurch, dass zumindest ein Teil der LEDs der LED-Beleuchtung als mindestens eine lineare LED-Einheit, beispielsweise als Wandfluter, ausgebildet ist, der in horizontaler und/oder vertikaler Ebene dezentral, vorzugsweise am Rand, im Verkaufsmöbel angebracht ist, und über eine asymmetrische Lichtstärkeverteilung eine gleichmäßige räumliche Lichtintensitätsverteilung erzeugt. Die asymmetrische Abstrahlcharakteristik der linearen LED-Einheit kann über eine dafür ausgelegte asymmetrische Linse realisiert werden.In addition, the invention relates to an LED lighting for refrigerated display cabinets, in particular of refrigerators, which has a plurality of LEDs (4,9) for illuminating the display units. It is further characterized in that at least a part of the LEDs of the LED lighting as at least one linear LED unit, for example, as a wall washer, is formed, which is mounted in a horizontal and / or vertical plane decentralized, preferably at the edge, in the display cabinet, and generates an even spatial light intensity distribution via an asymmetrical light intensity distribution. The asymmetric radiation characteristic of the linear LED unit can be realized by means of an asymmetrical lens designed for this purpose.

Die Lichtstärkeverteilung ist vorzugsweise insofern asymmetrisch, dass verstärkt Licht auf die Bereiche der Verkaufsfläche im Kühlmöbel, die sich weiter von der linearen LED-Einheit entfernt befinden im Vergleich zu den Bereichen, die sich näher an der linearen LED-Einheit befinden, ausgestrahlt wird.
Erfindungsgemäß weist die Linse auf: wenigstens eine fernbereichlenkende Oberfläche, mittels der das Licht bezüglich der linearen LED-Einheit in einen ferneren Bereich gelenkt wird, und wenigstens eine nahbereichlenkende Oberfläche, mittels der das Licht bezüglich der linearen LED-Einheit in einen näheren Bereich gelenkt wird. Auf diese Weise kann einfach eine asymmetrische Abstrahlcharakteristik erzielt werden.The luminous intensity distribution is preferably asymmetric in that increased light on the areas of the sales area in the refrigeration cabinets, which are located farther away from the linear LED unit compared to the Areas that are closer to the linear LED unit is broadcast.
According to the invention, the lens comprises: at least one far-range directing surface, by means of which the light is directed to a distant area with respect to the linear LED unit, and at least one near-range directing surface, by means of which the light is directed to a closer range with respect to the linear LED unit , In this way, an asymmetric radiation characteristic can be easily achieved.

Erfindungsgemäß sind unterschiedlichen Bereichen der Linse LEDs mit unterschiedlicher Lichtstärke und/oder Farbe zugeordnet sind. Auf diese Weise kann jeder einzelne Bereiche des Verkaufsmöbels individuell beleuchtet werden, wobei gleichzeitig eine homogene Beleuchtung aufrechterhalten bleibt.According to the invention, different areas of the lens are assigned LEDs with different light intensity and / or color. In this way, each individual area of the display cabinet can be illuminated individually, while maintaining a homogeneous lighting.

Erfindungsgemäß kann die Farbcharakteristik der linearen LED-Einheit einstellbar sein, insbesondere in Abhängigkeit der vorliegenden Produktgruppen.According to the invention, the color characteristic of the linear LED unit can be adjustable, in particular as a function of the present product groups.

In einem weiteren Aspekt der Erfindung ist die lineare LED-Einheit in ihrer Abstrahlcharakteristik horizontal und/oder vertikal bezüglich ihrer Farbcharakteristik asymmetrisch ausgebildet. Dadurch können unterschiedliche Warengruppen mit Licht unterschiedlicher Farbe bestrahlt werden.In a further aspect of the invention, the linear LED unit is embodied asymmetrically in terms of its emission characteristic horizontally and / or vertically with respect to its color characteristic. As a result, different groups of goods can be irradiated with light of different colors.

Die LED-Beleuchtung weist vorzugsweise einen hohen Farbwiedergabeindex auf, um die typischen Bedruckungen der Verpackungen der im Kühlregal vorliegenden Waren brillant erscheinen zu lassen.The LED lighting preferably has a high color rendering index in order to make the typical printings of the packages of the goods present in the cooling rack appear brilliant.

Besonders in Kombination mit einer an die verschiedenen in der Auslage angebotenen Warengruppen angepasste Farbe kann so eine konsumfördernde Beleuchtung geschaffen werden.Especially in combination with a color adapted to the various product groups offered in the display, a consumer-promoting lighting can be created.

Das Kühlregal dient vorzugsweise als Wärmesenke für die LED-Beleuchtung.The cooling shelf is preferably used as a heat sink for the LED lighting.

Gemäß der Erfindung kann das Verkaufsmöbel als Kühlschrank ausgebildet sein. Die LED-Einheit ist dabei vorzugsweise an der Innenseite des Türrahmens des Kühlschranks befestigt.According to the invention, the display cabinet can be designed as a refrigerator. The LED unit is preferably attached to the inside of the door frame of the refrigerator.

Weiterhin bezieht sich die Erfindung auf LED-Module, die aus zumindest einem Teil der LEDs der LED-Beleuchtung bestehen. Die LED-Module sind dabei in die Preisschilder der Verkaufsmöbel integriert, wobei die Preisschilder an den gekühlten Verkaufsmöbeln angebracht sind.Furthermore, the invention relates to LED modules, which consist of at least part of the LEDs of the LED lighting. The LED modules are integrated into the price tags of the sales furniture, the price tags are attached to the refrigerated display furniture.

Vorzugsweise sind dabei die in die Preisschilder integrierten LED-Module jeweils einer Ebene des Kühlregals zugeordnet.Preferably, the LED modules integrated in the price tags are each assigned to one level of the cooling rack.

Die Lichtstärkeverteilung der LED-Module kann insofern asymmetrisch sein, dass verstärkt Licht auf die sich weiter weg befindlichen Produkte im jeweiligen Kühlregal im Vergleich zu Produkten ausgestrahlt wird, die sich näher an den LED-Modulen befinden.The luminous intensity distribution of the LED modules may be asymmetrical in that increased light is emitted to the products further away in the respective cooling shelf in comparison to products which are located closer to the LED modules.

Des Weiteren kann die Farbcharakteristik der LED-Module einstellbar sein, insbesondere abhängig von den vorliegenden Produktgruppen.Furthermore, the color characteristic of the LED modules can be adjustable, in particular depending on the present product groups.

Vorzugsweise weisen die LED-Module in ihrer Abstrahlcharakteristik horizontal und/oder vertikal eine asymmetrische Farbcharakteristik auf, so dass unterschiedliche Warengruppen mit Licht unterschiedlicher Farbe bestrahlt werden können.Preferably, the LED modules have an asymmetrical color characteristic in their radiation characteristic horizontally and / or vertically, so that different groups of goods can be irradiated with light of different color.

Bei den Preisschildern kann es sich um elektronische Preisschilder, beispielsweise auf LCD-Basis, handeln. Die elektronischen Preisschilder können zentral gesteuert werden.The price tags may be electronic price tags, for example LCD based. The electronic price tags can be controlled centrally.

In einem weiteren Aspekt der Erfindung leuchtet zumindest ein Teil des ausgestrahlten Lichts der LED-Module, beispielsweise mittels einer separaten LED, von dem Verkaufsmöbel weg. Auf diese Weise kann auf die Preisschilder aufmerksam gemacht werden.In a further aspect of the invention, at least part of the emitted light of the LED modules, for example by means of a separate LED, shines away from the display cabinet. In this way, attention can be drawn to the price tags.

Die Preisschilder können also bei Sonderangeboten oder auf ein bestimmtes Kundenverhalten hin, beispielsweise mittels der separaten LED des LED-Moduls, hervorgehoben werden.The price tags can therefore be highlighted for special offers or for a specific customer behavior, for example by means of the separate LED of the LED module.

Die LED-Beleuchtung weist vorzugsweise eine zentrale Steuereinheit und eine Sensorik auf, wobei die Sensorik den Warenfüllstand des Verkaufsmöbels überwacht und der zentralen Steuereinheit meldet, wenn der Füllstand leer ist.The LED lighting preferably has a central control unit and a sensor, wherein the sensor monitors the goods level of the display cabinet and reports to the central control unit when the level is empty.

Schließlich betrifft die Erfindung ein System, das aus mindestens eine LED-Beleuchtung, wie oben beschrieben, aufweist.Finally, the invention relates to a system comprising at least one LED illumination as described above.

Nachfolgend soll die Erfindung anhand der beigefügten Zeichnung näher erläutert werden. Es zeigen:

Fig. 1
ein Ausführungsbeispiel einer erfindungsgemäßen LED-Anordnung in einem Kühlregal,
Fig. 2
ein Ausführungsbeispiel einer erfindungsgemäßen asymmetrischen Linse,
Fig. 3
eine LED-Einheit aufweisend die in Fig. 2 gezeigte Linse,
Fig. 4
eine Lichtstärkeverteilung in [cd/klm] einer LED-Beleuchtung mit symmetrischer Abstrahlcharakteristik und einer LED-Beleuchtung mit asymmetrischer Abstrahlcharakteristik,
Fig. 5
eine Detailansicht eines Preisschildes mit LED-Modul,
Fig. 6
ein weiteres Ausführungsbeispiel einer erfindungsgemäßen LED-Anordnung in einem Kühlschrank, und
Fig. 7
eine schematische Darstellung eines Systems.
The invention will be explained in more detail with reference to the accompanying drawings. Show it:
Fig. 1
An embodiment of an LED arrangement according to the invention in a cooling rack,
Fig. 2
An embodiment of an asymmetric lens according to the invention,
Fig. 3
an LED unit comprising the in Fig. 2 shown lens,
Fig. 4
a luminous intensity distribution in [cd / klm] of a LED illumination with symmetrical radiation characteristic and an LED illumination with asymmetric radiation characteristic,
Fig. 5
a detailed view of a price tag with LED module,
Fig. 6
a further embodiment of an inventive LED assembly in a refrigerator, and
Fig. 7
a schematic representation of a system.

Nachfolgend wird die Erfindung anhand eines Ausführungsbeispiels eines Betriebsgerätes erläutert.The invention will be explained with reference to an embodiment of an operating device.

In Fig. 1 ist ein Ausführungsbeispiel einer erfindungsgemäßen LED-Anordnung gezeigt. Dieses ist in einem Kühlregal 1 angebracht. Das Kühlregal weist dabei fünf Etagen auf, wobei diese durch das Einschieben von vier Fächern 2 realisiert sind. Nach oben ist das Kühlregal durch eine Abschlussdecke 7 begrenzt. An dieser ist eine lineare LED-Einheit 3 angebracht. Bei letzterer kann es sich um einen sogenannten Wandfluter ("Wall-Washer") handeln.In Fig. 1 an embodiment of an LED arrangement according to the invention is shown. This is in a cooling rack 1 attached. The cooling rack has five floors, which are realized by the insertion of four compartments 2. At the top, the cooling shelf is limited by a cover 7. At this a linear LED unit 3 is attached. The latter may be a so-called wall washer ("wall washer").

Die lineare LED-Einheit weist eine Vielzahl an LEDs 4 auf. Diese sind an der Stirnseite des Regals entlang horizontal angeordnet. Es können auch LEDs nebeneinander platziert werden, wie in diesem Ausführungsbeispiel drei nebeneinander angedeutet sind, um so die Intensität und/oder den Ausstrahlwinkel zu erhöhen.The linear LED unit has a plurality of LEDs 4. These are arranged horizontally along the front of the shelf. It is also possible to place LEDs side by side, as in this embodiment, three are indicated side by side, so as to increase the intensity and / or the beam angle.

Die LEDs können verschiedene Farben, vorzugsweise rot, grün und blau oder blau und rot, aufweisen. Dadurch kann monochromatisches Licht oder es können auch unterschiedlichste Farbspektren durch Mischen des ausgestrahlten Lichts mit geeigneten Mitteln, beispielsweise mit einer Streuscheibe, erzielt werden. Ferner kann die LED mit einer über dem LED-Chip angeordneten photolumineszierendem Material, wie beispielsweise Fluoreszenzfarbstoff oder Leuchtstoff (beispielsweise YAG, BOSE), versehen sein. Mittels dieser Leuchtstoffschicht kann das vom LED-Chip abgestrahlte Licht und das in dem photolumineszierendem Material umgewandelte Licht derart miteinander vermischt werden, so dass jede gewünschte Farbe oder weißes Licht (bspw. mittels blauer LED) erzeugt werden kann. An Stelle der LEDs sind auch OLEDs oder eine LED/OLED Kombination denkbar. Erfindungsgemäß ist folglich jede denkbare Kombination von LEDs in der LED-Beleuchtung denkbar.The LEDs may have different colors, preferably red, green and blue or blue and red. As a result, monochromatic light or even a very wide range of color spectra can be achieved by mixing the emitted light with suitable means, for example with a diffusing screen. Furthermore, the LED may be provided with a photoluminescent material arranged above the LED chip, such as, for example, fluorescent dye or phosphor (for example YAG, BOSE). By means of this phosphor layer, the light emitted by the LED chip and the light converted in the photoluminescent material can be mixed with one another in such a way that any desired color or white light (for example by means of a blue LED) can be produced. Instead of the LEDs, OLEDs or an LED / OLED combination are also conceivable. Consequently, any conceivable combination of LEDs in the LED lighting is conceivable according to the invention.

Die lineare LED-Einheit ist in ihrer Abstrahlcharakteristik auf einen bestimmten Winkel, beispielsweise 30°, begrenzt. Damit wird das Licht komplett auf die angebotenen Waren gebündelt und eine hohe Beleuchtungseffizienz erreicht.The linear LED unit is limited in its emission characteristics to a certain angle, for example 30 °. Thus, the light is completely bundled on the goods offered and achieved a high lighting efficiency.

Darüber hinaus wird durch eine asymmetrische Lichtstärkeverteilung eine gleichmäßige Beleuchtung der Waren in allen Stockwerken erreicht. Es wird nämlich verstärkt Licht auf die sich weiter weg befindlichen unteren Kühlregale im Vergleich zu den oberen Kühlregalen, die sich näher an der linearen LED-Einheit befinden, ausgestrahlt. Dies wird hier durch die Länge der Pfeile 6 symbolisiert, wobei die Länge die Lichtstärke wiedergibt.In addition, an asymmetrical distribution of light intensity ensures uniform illumination of the goods on all floors. Namely, light is increasingly radiated to the lower-level lower shelves as compared with the upper shelves closer to the linear LED unit. This is symbolized here by the length of the arrows 6, wherein the length reflects the light intensity.

Dabei ist denkbar, dass zur Realisierung verschieden starke LEDs eingesetzt werden, bzw. dass gleiche LEDs verschieden stark betrieben werde.It is conceivable that for the realization of different strength LEDs are used, or that the same LEDs are operated differently strong.

Alternativ oder zusätzlich kann eine asymmetrische Linse 20 in Ausstrahlrichtung vor die LED-Beleuchtung gesetzt werden. Ein Querschnitt einer solchen Linse 20 ist beispielhaft in Fig. 2 dargestellt. Die Linse 20 ist aus einem durchsichtigen, klaren oder matten, farblosen oder farbigen Material hergestellt. Beispielsweise ist die Linse 20 aus Glas, vorzugsweise jedoch aus Kunststoff, wie beispielsweise Polymethylmethacrylat (PMMA), hergestellt.Alternatively or additionally, an asymmetrical lens 20 can be placed in front of the LED illumination in the direction of emission. A cross section of such a lens 20 is exemplified in FIG Fig. 2 shown. The lens 20 is made of a clear, clear or matt, colorless or colored material. For example, the lens 20 is made of glass, but preferably of plastic, such as polymethylmethacrylate (PMMA).

Die Linse 20 wird derart vor die LED-Einheit 3 gesetzt, dass letztere in der in Fig. 2 dargestellten unteren Ausnehmung angeordnet ist und in Richtung der Linse 20 abstrahlt. Zur Verdeutlichung sind beispielhaft drei LEDs (z.B. RGB-LEDs) mit gestrichelten Linien dargestellt. Die Linse 20 weist vorzugsweise eine fernbereichlenkende Oberfläche 21 sowie eine nahbereichlenkende Oberfläche 22 auf.The lens 20 is placed in front of the LED unit 3 in such a way that the latter in the in Fig. 2 shown lower Recess is arranged and radiates in the direction of the lens 20. For clarity, three LEDs (eg RGB LEDs) are shown by dashed lines as an example. The lens 20 preferably has a far-range-directing surface 21 and a near-area-directing surface 22.

Mittels der fernbereichlenkenden Oberfläche 21 wird das Licht in einen von der LED-Einheit 3 weiter weg entfernten, also ferneren Bereich gelenkt. Die fernbereichlenkende Oberfläche 21 befindet sich vorzugsweise, wie in Fig. 2 gezeigt, in einem linken oder rechten (in Bezug auf einen Querschnitt der Linse 20 quer zu seiner Längserstreckung; vgl. bspw. Fig. 3) oberen Bereich. Sie ist dabei vorzugsweise entsprechend der gewünschten Abstrahlrichtung und Lichtstärke ausgebildet, vorzugsweise entsprechend abgewinkelt.By means of the far-range directing surface 21, the light is directed into a further away from the LED unit 3 away, so more distant area. The far-range directing surface 21 is preferably as shown in FIG Fig. 2 shown in a left or right (with respect to a cross section of the lens 20 transversely to its longitudinal extent; Fig. 3 ) upper area. It is preferably formed according to the desired emission direction and light intensity, preferably angled accordingly.

Mittels der nahbereichlenkenden Oberfläche 22 wird das Licht in einen näheren Bereich gelenkt. Die nahbereichlenkende Oberfläche 22 befindet sich vorzugsweise, wie in Fig. 2 gezeigt, in einem rechten oder linken (in Bezug auf einen Querschnitt der Linse 20 quer zu seiner Längserstreckung; vgl. bspw. Fig. 3) oberen Bereich und ist vorzugsweise neben der fernbereichlenkenden Oberfläche 21 angeordnet und geht besonders vorzugsweise in diese über. Die nahbereichlenkenden Oberfläche 22 ist vorzugsweise entsprechend der gewünschten Abstrahlrichtung und Lichtstärke ausgebildet, vorzugsweise weist sie eine entsprechende konvexe Form auf.By means of the near-area-directing surface 22, the light is directed into a nearer area. The near-area directing surface 22 is preferably as shown in FIG Fig. 2 shown in a right or left (with respect to a cross section of the lens 20 transversely to its longitudinal extent; Fig. 3 ) upper area and is preferably arranged adjacent to the far-range directing surface 21 and is particularly preferably in this over. The near-area-directing surface 22 is preferably formed according to the desired emission direction and light intensity, preferably it has a corresponding convex shape.

Das von den LEDs abgestrahlte Licht fällt folglich auf die Linse 20, genauer auf die fernbereichlenkenden Oberfläche 21 und auf die nahbereichlenkenden Oberfläche 22. Aufgrund der speziellen, asymmetrischen Ausgestaltung der Linse 20 wird das Licht entsprechend der Form der Linse 20 gezielt auf das jeweilige Verkaufsmöbel bzw. die darin angebotenen Waren gelenkt. Somit wird eine hohe Beleuchtungseffizienz erreicht. Durch die asymmetrische Lichtstärkeverteilung wird zudem eine gleichmäßige Beleuchtung der Waren in allen Stockwerken und Fächern 2 erzielt. Die Linse 20 gemäß dem Ausführungsbeispiel weist jeweils eine fernbereichlenkende Oberfläche 21 und eine nahbereichlenkende Oberfläche 22 auf. Diese können derart ausgestaltet sein, dass sie eine hohe Beleuchtungseffizienz bei gleichmäßiger Beleuchtung in unterschiedlich entfernten Bereichen erzielen. Es ist aber auch denkbar, dass die Linse 20 mehrere fernbereichlenkende Oberflächen und/oder mehrere nahbereichlenkende Oberflächen zur Erzielung einer homogenen Beleuchtung von Waren über alle Stockwerke verteilt und auch in allen Bereichen der Fächer 2 aufweist.
Bezüglich der asymmetrischen Linse 20 ist es denkbar, dass die fernbereichlenkende Oberfläche 21 derart ausgebildet ist, dass sie das Licht derart bündelt und gezielt ausrichtet, dass weiter entfernte Bereiche dieselbe Lichtintensitätsverteilung aufweisen wie nähere Bereiche, auf die das Licht mittels der nahbereichlenkenden Oberfläche 22 gelenkt wird. Erfindungsgemäßig sind der fernbereichlenkenden Oberfläche 21 und der nahbereichlenkenden Oberfläche 22 unterschiedliche LEDs zugeordnet. Auf diese Weise kann beispielsweise eine asymmetrische Abstrahlcharakteristik dadurch erzilet werden, dass der fernbereichlenkenden Oberfläche 21 stärkere LEDs (also LEDs mit hoher Lichtstärke) zugeordnet sind als der nahbereichlenkenden Oberfläche 22 (also LEDS mit schwächerer Lichtstärke). Auf diese Weise ergibt sich folglich eine homogene Beleuchtung der Waren bzw. Fächer 2.
Alternativ oder zusätzlich ist ferner denkbar, den einzelnen Oberflächen, also der fernbereichlenkenden Oberfläche 21 und/oder der nahbereichlenkenden Oberfläche 22 jeweils unterschiedlich farbige LEDs zuzuordnen. So können individuell und wunschgemäß entsprechende Bereiche in den Fächern 2 und oder Stockwerken mit unterschiedlichen Farbcharakteristik angestrahlt werden, während gleichzeitig eine homogene Beleuchtung aller Bereiche des Verkaufsmöbels gewährleistet bleibt. Durch Verwendung beispielsweise von RGB-LEDs kann die Farbe auch individuell jederzeit verändert werden.
Fig. 3 zeigt die in Fig. 2 gezeigte Linse 20 eingebaut in einer erfindungsgemäßen linearen LED-Einheit 3. Die LED-Einheit 3 ist dabei vorzugsweise in einem Profil bzw. Basisprofil 18 angeordnet. Im Betrieb ist das Basisprofil 18 vorzugsweise thermisch angebunden, beispielsweise über ein separates Kühlblech oder am Verkaufsmöbel selbst, um eine entsprechende Wärmeabfuhr zu gewährleisten. Die asymmetrische Linse 20 wird auf das Basisprofil 18 und in Ausstrahlrichtung vor die linear angeordneten LEDs gesetzt. Dabei ist die Linse 20 vorzugsweise mit dem Basisprofil 18 durch Verschraubung, Aufklemmen, einen Einrastmechanismus oder dergleichen sicher verbunden.The light emitted by the LEDs thus falls on the lens 20, more precisely on the far-range directing surface 21 and the near-field-directing surface 22. Due to the special, asymmetrical design of the lens 20, the light is directed to the particular display cabinet or cabinet according to the shape of the lens 20 The goods offered therein are steered. Thus, a high lighting efficiency is achieved. Due to the asymmetrical light intensity distribution, a uniform illumination of the goods in all floors and compartments 2 is also achieved. The lens 20 according to the exemplary embodiment in each case has a far-range-directing surface 21 and a near-area-directing surface 22. These can be designed such that they achieve a high illumination efficiency with uniform illumination in different areas. However, it is also conceivable that the lens 20 has a plurality of far-range-directing surfaces and / or several near-area-directing surfaces for achieving a homogeneous illumination of goods distributed over all floors and also in all areas of the compartments 2.
With respect to the asymmetrical lens 20, it is conceivable that the far-range directing surface 21 is configured to focus and direct the light so that more distant regions have the same light intensity distribution as nearer regions to which the light is directed by the near-surface-directing surface 22 , According to the invention, the far-range-directing surface 21 and the near-area-directing surface 22 associated with different LEDs. In this way, for example, an asymmetrical emission characteristic can be achieved by assigning the far-range-directing surface 21 stronger LEDs (ie LEDs with high light intensity) than the near-range-guiding surface 22 (ie LEDs with weaker light intensity). In this way, there is consequently a homogeneous illumination of the goods or compartments 2.
Alternatively or additionally, it is also conceivable to assign differently colored LEDs to the individual surfaces, that is to say to the far-range-directing surface 21 and / or the near-area-directing surface 22. Thus, individual and desired areas corresponding areas in the subjects 2 and or floors with different color characteristics can be illuminated, while at the same time a homogeneous lighting of all areas of the display cabinet remains guaranteed. By using, for example, RGB LEDs, the color can also be changed individually at any time.
Fig. 3 shows the in Fig. 2 shown lens 20 installed in a linear LED unit according to the invention 3. The LED unit 3 is preferably arranged in a profile or base profile 18. In operation, the base profile 18 is preferably thermally connected, for example via a separate cooling plate or on the sales furniture itself to ensure a corresponding heat dissipation. The asymmetrical lens 20 is placed on the base profile 18 and in the emission direction in front of the linearly arranged LEDs. In this case, the lens 20 is preferably with the Base profile 18 securely connected by screwing, clamping, a latching mechanism or the like.

Gemäß Fig. 3 erstreckt sich die Linse 20 über die gesamte Basisprofilbreite und -länge. Die Linse 20 kann jedoch das Basisprofil 18 bzw. die LED-Einheit 3 auch nur teilweise abdecken, solange sie wenigstens teilweise in Abstrahlrichtung vor den linear angeordneten LEDs angeordnet ist. Es ist auch denkbar, dass die Linse 20 in Längsrichtung teilweise asymmetrisch und teilweise symmetrisch ausgebildet ist. Ferner kann sich auch das asymmetrische Linsenprofil in Längsrichtung, also über die Länge des Basisprofils 18 bzw. der LED-Einheit 3 entsprechend der gewünschten Abstrahlcharakteristik ändern.According to Fig. 3 the lens 20 extends over the entire base profile width and length. However, the lens 20 may only partially cover the base profile 18 or the LED unit 3 as long as it is at least partially arranged in the emission direction in front of the linearly arranged LEDs. It is also conceivable that the lens 20 is partially asymmetrical and partially symmetrical in the longitudinal direction. Furthermore, the asymmetrical lens profile in the longitudinal direction, ie over the length of the base profile 18 and the LED unit 3 according to the desired radiation characteristic change.

Gemäß der obigen Beschreibung zu Fig. 2 zur Verwendung unterschiedlicher LEDs bezüglich der Linse 20, so können auch über die gesamte Länge der LED-Einheit 3 unterschiedliche LEDs verwendet werden. Beispielsweise können entsprechend der Linsenform jeweils unterschiedlich starke (mit unterschiedlicher Lichtstärke) oder andersfarbige LEDs verwendet werden, um individuell eine homogene Beleuchtung mit frei wählbarer Farbcharakteristik zu erzielen. So können bspw. Waren in einem oberen Fach auf der linken Seite anderes, also auch andersfarbig, angestrahlt werden als Waren auf der entsprechend linken Seite, und auch anders als Waren in anderen Bereichen des Verkaufsmöbels, wobei jedoch eine homogene Beleuchtung aufrechterhalten werden kann. Durch Verwendung beispielsweise von RGB-LEDs kann die Farbe auch individuell jederzeit verändert werden. Die Erfindung ist jedoch nicht auf eine bestimmte Kombination von LEDs zu entsprechenden Linsenbereichen sowohl in Längs- als auch in Querrichtung der LED-Einheit 3 beschränkt.As described above Fig. 2 for the use of different LEDs with respect to the lens 20, 3 different LEDs can be used over the entire length of the LED unit. For example, differently strong (with different light intensity) or differently colored LEDs can be used according to the lens shape to individually achieve homogeneous illumination with freely selectable color characteristics. Thus, for example, goods in an upper compartment on the left side can be illuminated differently than other goods on the corresponding left side, and also differently than goods in other areas of the display cabinet, but homogeneous illumination can be maintained. By using, for example, RGB LEDs, the color can also be changed individually at any time. However, the invention is not limited to a particular combination limited by LEDs to corresponding lens areas both in the longitudinal and in the transverse direction of the LED unit 3.

Die LED-Einheit 3 mit Linse 20 und Basisprofil 18 ist vorzugsweise an ihren Stirnseiten zwischen zwei Endkappen 19 angeordnet und befestigt. Besonders vorzugsweise ist die LED-Einheit 3 zwischen den Endkappen 19 um ihre Längsachse verschwenkbar oder drehbar angeordnet. Dabei kann sie so ausgebildet sein, dass durch drehen um 180° die asymmetrische Abstrahlcharakteristik der LED-Einheit 3 spiegelverkehrt wird. Dadurch kann eine LED-Einheit 3 durch einfaches Drehen sowohl links als auch rechts sowie oben als auch unten im Verkaufsmöbel verwendet werden. Es ist auch denkbar, dass das Basisprofil 18 mit den Endkappen 19 starr verbunden ist, und die Linse 20 auf dem Basisprofil 18 in schwenkbarer Weise angeordnet ist. Auf diese Weise kann die LED-Einheit 3 auch nach ihrer Befestigung entsprechend dem Einsatzort einfach durch Verschwenken der Einheit ausgerichtet werden.The LED unit 3 with lens 20 and base profile 18 is preferably arranged and fastened at its end faces between two end caps 19. Particularly preferably, the LED unit 3 between the end caps 19 is pivotable about its longitudinal axis or rotatably arranged. In this case, it can be designed so that by rotating through 180 °, the asymmetric radiation characteristic of the LED unit 3 is mirror-inverted. As a result, an LED unit 3 can be used by simply turning both left and right as well as up and down in the display cabinet. It is also conceivable that the base profile 18 is rigidly connected to the end caps 19, and the lens 20 is arranged on the base profile 18 in a pivotable manner. In this way, the LED unit 3 can be aligned by pivoting the unit even after their attachment according to the location.

Die Endkappen 19 wiederum weisen vorzugsweise einen Befestigungsflansch 19a auf, mit dem die LED-Einheit 3 befestigt werden kann. Der Flansch 19a kann dabei in eine Einrastvorrichtung eingerastet oder über Bohrungen bzw. Löcher 19b, vorzugsweise Langlöcher, im Flansch 19a mittels Befestigungsmittel, wie beispielsweise Schrauben, befestigt werden. Das Anschlusskabel für die LED-Einheit 3 kann stirnseitig oder nach hinten, vorzugsweise über eine Endkappe 19, weggeführt werden.The end caps 19 in turn preferably have a mounting flange 19a, with which the LED unit 3 can be attached. The flange 19a can be snapped into a latching device or holes or holes 19b, preferably elongated holes, in the flange 19a by means of fastening means, such as screws, are attached. The connection cable for the LED unit 3 can be led away from the front or to the rear, preferably via an end cap 19.

Fig. 4 zeigt beispielhaft ein Polardiagramm für die Lichtstärkeverteilung [cd/klm] einer LED-Einheit mit symmetrischer Abstrahlcharakteristik S und mit asymmetrischer Abstrahlcharakteristik A. Dem Diagramm ist zu entnehmen, dass die LED-Einheit mit symmetrischer Abstrahlcharakteristik oder Linse eine gleichmäßige Verteilung der Lichtstärke (bspw. ca. 500 cd/klm in Fig. 4) über einen durch die LED-Anordnung bedingten Abstrahlwinkel von beispielsweise 90° hat. Bei der asymmetrischen Linse 20 bzw. Abstrahlcharakteristik ist zu erkennen, dass durch dessen Ausgestaltung das abgestrahlte Licht gebündelt wird in einem Abstrahlwinkel von ca. 20 bis 40°, vorzugsweise 30°. Ferner ist die Lichtstärke derart verteilt, dass sie in gewünschten Bereichen höher ist (bspw. ca. 600 cd/klm in einem rechten Bereich der Lichtstärkeverteilung in Fig. 4) als in anderen Bereichen (bspw. ca. 400 cd/klm in einem linken Bereich der Lichtstärkeverteilung in Fig. 4). Zwischen diesen Bereichen kann die Lichtstärkeverteilung entsprechend dem Einsatzort individuell durch die Form der Linse 20 bestimmt werden; in Fig. 4 ist beispielsweise ein annähernd linearer Verlauf dargestellt. Fig. 4 shows by way of example a polar diagram for the luminous intensity distribution [cd / klm] of an LED unit Symmetrical radiation characteristic S and with asymmetric radiation characteristic A. The diagram shows that the LED unit with symmetrical radiation characteristic or lens uniform distribution of light intensity (eg. Approximately 500 cd / klm in Fig. 4 ) has a caused by the LED array radiation angle of for example 90 °. In the case of the asymmetrical lens 20 or emission characteristic, it can be seen that the radiated light is focused by its design in an emission angle of approximately 20 to 40 °, preferably 30 °. Furthermore, the light intensity is distributed in such a way that it is higher in desired regions (eg approx. 600 cd / klm in a right-hand region of the light intensity distribution in FIG Fig. 4 ) than in other areas (eg, about 400 cd / klm in a left area of the luminous intensity distribution in Fig. 4 ). Between these areas, the light intensity distribution can be determined individually according to the place of use by the shape of the lens 20; in Fig. 4 For example, an approximately linear course is shown.

An den Stirnseiten der Regalfächer 2 befinden sich die Preisschilder 5 der angebotenen Waren. Diese sind als elektronische LCD-Anzeigen realisiert.At the end faces of the shelves 2 are the price tags 5 of the goods offered. These are realized as electronic LCD displays.

Fig. 5 zeigt hierzu eine Detailansicht eines Preisschildes 5. Das Preisschild 5 weist dabei eine LCD-Anzeige 8 auf. Bei der Anzeige kann es sich jedoch um jede beliebige andere elektronische Anzeige handeln. Fig. 5 shows a detailed view of a price tag 5. The price tag 5 has an LCD display 8. However, the ad can be any other electronic ad.

Auf der Rückseite des Preisschilds befindet sich ein LED-Modul 11. Auf diesem sind drei LEDs 4 angedeutet, die eine unterschiedliche Ausstrahlrichtung aufweisen. Selbstverständlich kann das LED-Modul auch mehr oder weniger LEDs umfassen. Erneut sind die LEDs so ausgerichtet, dass Produkte in weitere Entfernung heller beleuchtet werden, als solche in der Nähe. Dies wird durch die Länge der Pfeile 6 symbolisiert. Dadurch wird eine gleichmäßige Helligkeit der gesamten Auslage des Regals erreicht.On the back of the price tag is an LED module 11. On this, three LEDs 4 are indicated, the have a different emission direction. Of course, the LED module may also include more or fewer LEDs. Again, the LEDs are aligned so that products are illuminated more brightly in the distance than those in the vicinity. This is symbolized by the length of the arrows 6. As a result, a uniform brightness of the entire display of the shelf is achieved.

Auf derselben Seite wie die LCD-Anzeige ist mindestens eine weitere LED 9 angebracht. Diese hat die Funktion, die Aufmerksamkeit des Kunden auf die Anzeige zu erhöhen. So können beispielsweise Sonderpreise hervorgehoben werden. Außerdem ist denkbar, dass das die Erfindung einsetzende Geschäft eine Kundenidentifikation durchführt und das Kaufverhalten der identifizierten Kunden registriert. Auf diese Weise können Produkte, die potentiell in dem Kaufverhalten eines sich im Geschäft befindenden Kunden entsprechen, besonders hervorgehoben werden. Selbstverständlich sind auch weitere Möglichkeiten der Hervorhebung denkbar. So kann beispielsweise die Anzeige eine auffällige Signalisierung in diesem Falle aufweisen.At least one additional LED 9 is mounted on the same side as the LCD display. This has the function to increase the attention of the customer to the ad. For example, special prices can be highlighted. It is also conceivable that the business implementing the invention carries out a customer identification and registers the buying behavior of the identified customers. In this way, products that potentially correspond to the buying behavior of a customer in business can be highlighted. Of course, other ways of highlighting are conceivable. For example, the display may have a conspicuous signaling in this case.

Darüber hinaus kann die LED-Beleuchtung einen oder mehrere Lichtsensoren 10 aufweisen. Dieser kann dafür ausgelegt sein, das Umgebungslicht zu erfassen und eine Kompensation der Beleuchtung durch die LED-Beleuchtung hervorzurufen. Außerdem ist es möglich, dass er den Warenfüllstand des Verkaufsmöbels erfasst. Auf diese Weise können die zuständigen Mitarbeiter des Geschäfts darüber informiert werden, dass beispielsweise ein bestimmtes Produkt im Geschäft nicht mehr verfügbar ist, bzw. dass ein bestimmtes Regal leer ist.In addition, the LED lighting can have one or more light sensors 10. This can be designed to detect the ambient light and to compensate for the illumination caused by the LED lighting. In addition, it is possible that he recorded the goods level of the sales cabinet. In this way, the responsible employees of the store can be informed that, for example, a certain product is no longer available in the store, or that a particular shelf is empty.

Allgemein ist die Farbcharakteristik der LED-Beleuchtung so einstellbar, insbesondere abhängig von den vorliegenden Produktgruppen. Hierfür weist sie, wie bereits erwähnt, verschiedenfarbige LEDs auf. Außerdem kann die Farbcharakteristik lokal variiert werden. Dadurch wird erreicht, dass unterschiedliche Warengruppen mit Licht unterschiedlicher Farbe bestrahlt werden können.In general, the color characteristic of the LED lighting is adjustable, in particular depending on the present product groups. For this purpose, as already mentioned, it has differently colored LEDs. In addition, the color characteristic can be varied locally. This ensures that different groups of goods can be irradiated with light of different colors.

Dabei wird ein besonders hoher Farbwiedergabeindex erzielt, um die typischen Bedruckungen der Verpackungen der im Kühlregal vorliegenden Waren brillant erscheinen zu lassen. Auch bei unverpackten Produkten oder solchen in durchsichtiger Verpackung, wie z.B. Gemüse oder Fleisch, wird eine besondere Attraktivität der Produkte dadurch erzielt, dass ein hoher Farbwiedergabeindex sichergestellt ist. Außerdem kann die Farbtemperatur dem jeweiligem Produkt angepasst werden. So ist beispielsweise bei Fleisch eine besondere Unterstützung der Röte dadurch erreichbar, dass die Farbtemperatur auf ein niedrigeres Niveau gesetzt wird. Dies kann erzielt werden, indem die roten LEDs stärker betrieben werden.In this case, a particularly high color rendering index is achieved in order to make the typical printings of the packaging of the goods present in the cooling rack appear brilliant. Also in the case of unpackaged products or those in transparent packaging, e.g. Vegetables or meat, a special attractiveness of the products is achieved by ensuring a high color rendering index. In addition, the color temperature can be adapted to the respective product. For example, with meat, special support of redness can be achieved by setting the color temperature to a lower level. This can be achieved by operating the red LEDs more strongly.

Ein weiterer erfindungsgemäßer Vorteil ergibt sich daraus, dass die LEDs durch Anbringen am Kühlregal durch die von diesem ausgestrahlte Kälte automatisch gekühlt werden. Dadurch weisen diese eine optimale Leuchteffizienz auf. Des Weiteren kann die Fläche des Kühlregals, auf der die LED-Beleuchtung angebracht ist, als Wärmesenke dienen. Dies kann zusätzlich noch dadurch gefördert werden, dass die LED-Beleuchtung auf ein Kühlblech angebracht wird. Dieses kann entweder integraler Bestandteil des Kühlregals sein. Es kann jedoch auch eine separate Platte zwischen LED-Beleuchtung und Kühlregal sein.A further advantage according to the invention results from the fact that the LEDs are automatically cooled by being attached to the cooling rack by the cold emitted by the latter. As a result, they have optimum luminous efficiency. Furthermore, the surface of the refrigerated shelf on which the LED lighting is mounted, serve as a heat sink. This can additionally still by be promoted that the LED lighting is mounted on a heat sink. This can either be an integral part of the refrigerator shelf. However, it can also be a separate panel between LED lighting and cooling rack.

Die LED-Beleuchtung weist eine Elektronik zum Ansteuern und Regeln der LEDs auf, damit diese korrekt betrieben werden können. Insbesondere ist eine Ansteuerelektronik dabei so ausgelegt, dass die LED-Beleuchtung an konventionelle Stromversorgung, wie bspw. 12V DC oder AC-Netzspannung, anschließbar ist. Ebenfalls ist denkbar, dass die linearen LED-Beleuchtungseinheit Anschlüsse für konventionelle Lampenfassungen, wie z.B. von Leuchtstoffröhren, aufweisen. Die Elektronik ist dabei vorzugsweise in die LED-Beleuchtung integriert, kann jedoch auch in dem Kühlregal oder anderweitig separat untergebracht sein.The LED lighting has electronics for driving and controlling the LEDs so that they can be operated correctly. In particular, a control electronics is designed so that the LED lighting on conventional power supply, such as. 12V DC or AC mains voltage, can be connected. It is also conceivable that the linear LED lighting unit may provide connections for conventional lamp sockets, such as e.g. of fluorescent tubes. The electronics are preferably integrated in the LED lighting, but can also be housed separately in the cooling rack or otherwise.

Zur Regelung einer lokal variierenden Leuchtstärke und Farbcharakteristik können mehrere Versorgungsleiter eingesetzt werden, wobei die LEDs beispielsweise mittels Pulse-Width-Modulation und/oder mittels des Ansteuerstroms unterschiedlich stark betrieben werden können.To control a locally varying luminous intensity and color characteristic, a plurality of supply conductors can be used, wherein the LEDs can be operated to different degrees, for example by means of pulse width modulation and / or by means of the drive current.

In Fig. 6a und 6b wird ein weiteres Ausführungsbeispiel einer erfindungsgemäßen LED-Anordnung in einem Kühlschrank gezeigt. Fig. 6a zeigt dabei den Kühlschrank von vorne, während Fig. 6b eine Aufsicht von oben darstellt.In Fig. 6a and 6b a further embodiment of an LED array according to the invention is shown in a refrigerator. Fig. 6a shows the fridge from the front, while Fig. 6b represents a top view.

Der Kühlschrank weist drei Türen 16 auf. Diese sind an die Türrahmen 17 montiert. An den Türrahmen sind auf der Innenseite LED-Beleuchtungen befestigt. Diese können als lineare LED-Einheiten 3 ausgebildet sein. Die linearen LED-Einheiten sind dabei vertikal ausgerichtet. Alternativ können auch eine oder mehrere LED-Module an der Innenseite des Türrahmens angebracht sein.The refrigerator has three doors 16. These are mounted on the door frame 17. On the door frame LED lights are mounted on the inside. These can be designed as linear LED units 3. The linear LED units are vertically aligned. Alternatively, one or more LED modules can be mounted on the inside of the door frame.

Die linearen LED-Einheiten 3 an den Ecken links und rechts des Kühlschranks weisen eine asymmetrische Abstrahlcharakteristik auf, wie dies beispielsweise auch in dem Polardiagramm in Fig. 4 gezeigt ist. Hierdurch kann das Problem kompensiert werden, dass diese in der horizontalen Ebene dezentral im Kühlschrank angebracht sind, d.h. dass diese von einer dezentral gelegenen Position aus den Raum ausleuchten. Durch die asymmetrische Abstrahlcharakteristik wird der die Verkaufsfläche, dass heißt hier die einzelnen Regale, in den Bereichen der weiter von den linearen LED-Einheiten 3 entfernt gelegenen Bereichen stärker beleuchtet, als die näher gelegenen. Dadurch kann trotz der dezentralen Position der linearen LED-Einheiten 3 eine gleichmäßige Beleuchtung der Kühlregale erreicht werden. Dabei ist ihr Abstrahlwinkel vorzugsweise 30°.The linear LED units 3 at the corners left and right of the refrigerator have an asymmetric radiation characteristic, as for example, in the polar diagram in Fig. 4 is shown. This can compensate for the problem that they are mounted decentralized in the horizontal plane in the refrigerator, ie that they illuminate the room from a decentralized position. Due to the asymmetrical radiation characteristic of the sales area, that is, here the individual shelves, in the areas of more distant from the linear LED units 3 areas illuminated more than the closer. As a result, despite the decentralized position of the linear LED units 3, a uniform illumination of the refrigerated shelves can be achieved. Their emission angle is preferably 30 °.

Die LED-Beleuchtungen 15 zwischen den drei Türen 16 weisen im Gegensatz dazu eine symmetrische Abstrahlcharakteristik auf, wie dies beispielsweise auch in dem Polardiagramm in Fig. 4 dargestellt ist. Dabei ist ihr Abstrahlwinkel deutlich größer, vorzugsweise mindestens 90°.The LED lights 15 between the three doors 16, in contrast, have a symmetrical radiation characteristic, as for example in the polar diagram in FIG Fig. 4 is shown. Their emission angle is significantly greater, preferably at least 90 °.

Erneut kann wieder eine asymmetrische Linse, wie beispielsweise die Linse in Fig. 2, in Ausstrahlrichtung vor die LED-Beleuchtung gesetzt werden, um eine asymmetrische Abstrahlcharakteristik zu erreichen. Bei Verwendung einer linearen LED-Einheit weist die Linse vorzugsweise eine der LED-Einheit entsprechende längliche Form auf.Again, an asymmetric lens, such as the lens in Fig. 2 , are placed in front of the LED illumination in the beam direction in order to achieve an asymmetrical emission characteristic. When using a linear LED unit, the lens preferably has an elongate shape corresponding to the LED unit.

Wie bezüglich Fig. 3 beschrieben ist darüber hinaus denkbar, dass die Linse um ihre Längsachse drehbar ist. Dabei kann sie so ausgebildet sein, dass durch drehen um 180° die asymmetrische Abstrahlcharakteristik der LED-Einheit 3 spiegelverkehrt wird. Dadurch kann eine LED-Einheit 3 durch einfaches Drehen ihrer Linse sowohl links als auch rechts im Kühlschrank verwendet werden.As for re Fig. 3 Moreover, it is conceivable that the lens is rotatable about its longitudinal axis. In this case, it can be designed so that by rotating through 180 °, the asymmetric radiation characteristic of the LED unit 3 is mirror-inverted. As a result, an LED unit 3 can be used by simply turning its lens both left and right in the refrigerator.

In Fig. 7 wird schematisch ein mögliches System 12 zur Ausleuchtung, Information und Überwachung von Verkaufsmöbeln gezeigt. Das System weist hierzu eine zentrale Steuereinheit 13 auf. Diese ist für die Anzeige auf den LCD-Anzeigen 8, für die Beleuchtung mittels der LED-Beleuchtung en 11 und für die Erfassung des Warenfüllstands mittels der Sensoren 10 zuständig. Dabei sind mehrere LEDs 11 oder LEDs-Anordnungen, mehrere LCD-Anzeigen 8 und mehrere Lichtsensoren 10 über einen Bus 14 mit der zentralen Steuereinheit 13 verbunden.In Fig. 7 schematically a possible system 12 for illumination, information and monitoring of display furniture is shown. For this purpose, the system has a central control unit 13. This is responsible for the display on the LCD displays 8, for the illumination by means of the LED illumination en 11 and for the detection of the goods level by means of the sensors 10. In this case, a plurality of LEDs 11 or LED arrays, a plurality of LCD displays 8 and a plurality of light sensors 10 are connected via a bus 14 to the central control unit 13.

Bei der zentralen Steuereinheit kann es sich beispielsweise um einen im Geschäftsbüro befindlichen Computer handeln.The central control unit may be, for example, a computer located in the business office.

Mittels des Systems kann also die Beleuchtung in sämtlichen Verkaufsmöbeln des Geschäfts, beispielsweise eine Vielzahl von Kühlregalen, auf erfindungsgemäße Art zentral gesteuert werden. Darüber hinaus lässt sich der Füllstand der Waren zentral überwachen. Außerdem kann ein Preis oder weitere Informationen zu einem Produkt von zentraler Stelle aus geändert werden.By means of the system so the lighting in all the sales furniture of the business, for example a plurality of refrigerated shelves, centrally controlled in accordance with the invention. In addition, the level of goods can be monitored centrally. In addition, a price or other information about a product can be changed from a central location.

Es ist zu bemerken, dass die Erfindung keineswegs auf Kühlregale allein beschränkt ist. Die Erfindung kann genauso gut in anderen gekühlten oder ungekühlten Verkaufsmöbeln eingesetzt werden, wie Kühltruhen oder ungekühlten Regalen.It should be noted that the invention is by no means limited to refrigerated shelves alone. The invention may as well be used in other refrigerated or uncooled display cabinets, such as freezers or uncooled shelves.

Bezugszeichenliste:LIST OF REFERENCE NUMBERS

11
gekühltes Verkaufsmöbel (Kühlschrank bzw. Kühlregal)refrigerated display cabinet (refrigerator or refrigerated shelf)
22
Kühlregalfach (Fach)Cooling shelf compartment (compartment)
33
lineare LED-Einheitlinear LED unit
44
LEDLED
55
Preisschildprice tag
66
LichtausstrahlrichtungLichtausstrahlrichtung
77
Abschlussdecke des KühlregalEnd cover of the refrigerated shelf
88th
Anzeigedisplay
99
LEDLED
1010
Sensorsensor
1111
LED-ModulLED module
1212
Systemsystem
1313
zentrale Steuereinheitcentral control unit
1414
Busbus
1515
LED-Beleuchtung mit symmetrischer AbstrahlcharakteristikLED lighting with symmetrical emission characteristics
1616
Kühlschrank-TürRefrigerator Door
1717
Türrahmendoorframe
1818
(Basis-)Profil(Base) profile
1919
Endkappeendcap
19a19a
(Befestigungs-)Flansch(Fixing) flange
19b19b
(Befestigungs-)Bohrung bzw. Loch(Mounting) hole or hole
2020
asymmetrische Linseasymmetric lens
2121
fernbereichlenkende Oberflächefar-range directing surface
2222
nahbereichlenkende OberflächeNear-area-directing surface
AA
asymmetrischer Abstrahlbereichasymmetric radiation range
SS
symmetrischer Abstrahlbereichsymmetrical radiation area

Claims (15)

  1. An LED light for refrigerated vending furniture (1), in particular of refrigerated shelves comprising a plurality of LEDs (4, 9) for illuminating the vending furniture, wherein at least a portion of the LEDs of the LED light is designed as at least one linear LED unit (3), for example, as a wall floodlight, and the at least one linear LED unit (3) is mounted in the upper region of the refrigerated piece of furniture, in particular, below the upper closing cover (7) of the refrigerated shelf, wherein the linear LED unit (3) is limited in its emission characteristic to a specific emission angle and thereby has an asymmetrical luminous intensity distribution, and
    wherein the asymmetrical emission characteristic of the linear LED unit (3) is realized by means of an asymmetrical lens (20) designed for this purpose
    characterized in that
    the lens (20) has:
    - at least one far-range directing surface (21), by means of which the light is directed to a more distant region relative to the linear LED unit (3), and
    - at least one close-range directing surface (22), by means of which the light is directed to a closer region relative to the linear LED unit (3),
    wherein different LEDs are assigned to the far-range directing surface (21) and to the close-range directing surface (22).
  2. An LED light according to Claim 1,
    characterized in that
    the specific emission angle has 30°.
  3. An LED light according to the preceding claims,
    characterized in that
    the luminous intensity distribution is asymmetrical to the extent that intensified light is emitted onto the lower refrigerated shelves which are located further away in comparison to the upper refrigerated shelves, which are located closer to the linear LED unit (3).
  4. An LED light for refrigerated vending furniture (1), in particular of refrigerators, comprising a plurality of LEDs (4, 9) for illuminating the vending furniture, wherein at least a portion of the LEDs of the LED light is designed as at least one linear LED unit (3), for example, as a wall floodlight, which is mounted in a horizontal and/or vertical plane in a decentralized manner, preferably on the edge, in the piece of vending furniture, and generates a uniform spatial light intensity distribution by means of an asymmetrical luminous intensity distribution, wherein the asymmetrical emission characteristic of the linear LED unit (3) is realized by means of an asymmetrical lens (20) designed for this purpose,
    characterized in that
    the lens (20) has:
    - at least one far-range directing surface (21), by means of which the light is directed to a more distant region relative to the linear LED unit (3), and
    - at least one close-range directing surface (22), by means of which the light is directed to a closer region relative to the linear LED unit (3),
    wherein different LEDs are assigned to the far-range directing surface (21) and to the close-range directing surface (22).
  5. An LED light according to any one of the preceding claims,
    characterized in that
    the piece of vending furniture is designed as a refrigerator, and the LED unit (3) is fastened to the inner side of the door frame (17) of the refrigerator.
  6. An LED light according to Claim 4,
    characterized in that
    the luminous intensity distribution is asymmetrical to the extent that intensified light is emitted to the regions of the sales area in the piece of refrigerated furniture, which are located further away from the linear LED unit in comparison to the regions, which are located closer to the linear LED unit.
  7. An LED light according to any one of the preceding claims,
    characterized in that
    LEDs with different light intensity and/or color are assigned to different regions of the lens (20).
  8. An LED light according to any one of the preceding claims,
    characterized in that
    stronger LEDs are assigned to the far-range directing surface than to the close-range directing surface and/or LEDs with different colors are assigned to the far-range directing surface and the close-range directing surface.
  9. An LED light according to any one of the preceding claims,
    characterized in that
    the color characteristic of the LED light is adjustable, in particular, depending on the available product groups.
  10. An LED light according to any one of the preceding claims, characterized in that the LED light has an asymmetrical color characteristic horizontally and/or vertically in its emission characteristic, so that different product groups can be illuminated with light different colors.
  11. An LED light according to any one of the preceding claims, characterized in that the LED light has a high color rendering index, in order to make the typical printing of the packages of the products available in the refrigerating shelf appear brilliant.
  12. An LED light according to any one of the preceding claims, characterized in that the surface of the refrigerated piece of furniture serves as a heat dissipator of the LEDs (4, 9) of the LED light.
  13. An LED light according to any one of the preceding claims,
    characterized in that
    at least a portion of the LEDs (4, 9) of the LED light is designed as LED modules (11), and the LED modules are integrated into the price tags (5) of the vending furniture, wherein the price tags (5) are attached to the refrigerated vending furniture, wherein the LED modules (11) integrated into the price tags (5) are preferably in each case assigned to a level (2) of the refrigerated shelf (1), wherein the luminous intensity distribution of the LED modules (11) is preferably asymmetrical to the extent that intensified light is emitted to the products located further away in the respective refrigerated shelf in comparison to products, which are located closer to the LED modules,
    wherein the price tags are preferably electronic price tags (8), for example, on an LCD base, and these are controlled centrally,
    wherein preferably at least a portion of the emitted light of the LED modules (11) is illuminated away from the piece of vending furniture (1), for example, by means of a separate LED (9), and thus can draw attention to the price tags, and wherein the price tags (5) are preferably highlighted in the case of special offers or directed towards a specific customer behavior, for example, by means of the separate LED of the LED module.
  14. An LED light according to any one of the preceding claims,
    characterized in that
    the LED unit (3) has red, green and blue (RGB) LEDs or blue and red LEDs for generating monochromatic, white or mixed-color light, or the LEDs are provided with photo-luminescent material, for example, luminescent material for generating white or colored light, or a combination of the aforementioned LEDs.
  15. Refrigerated vending furniture, having an LED light according to any one of the preceding claims.
EP10716819.7A 2009-04-23 2010-04-23 Led lighting device for refrigerated display case Not-in-force EP2421414B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202009005961U DE202009005961U1 (en) 2009-04-23 2009-04-23 LED lighting for refrigerated display cabinets
PCT/EP2010/055457 WO2010122154A1 (en) 2009-04-23 2010-04-23 Led light for refrigerated vending furniture

Publications (2)

Publication Number Publication Date
EP2421414A1 EP2421414A1 (en) 2012-02-29
EP2421414B1 true EP2421414B1 (en) 2018-10-17

Family

ID=42244391

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10716819.7A Not-in-force EP2421414B1 (en) 2009-04-23 2010-04-23 Led lighting device for refrigerated display case

Country Status (3)

Country Link
EP (1) EP2421414B1 (en)
DE (2) DE202009005961U1 (en)
WO (1) WO2010122154A1 (en)

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Also Published As

Publication number Publication date
EP2421414A1 (en) 2012-02-29
DE112010001717A5 (en) 2012-09-20
WO2010122154A1 (en) 2010-10-28
DE202009005961U1 (en) 2010-09-23

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