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WO2006018160A2 - Lighting device for a refrigerating device - Google Patents

Lighting device for a refrigerating device Download PDF

Info

Publication number
WO2006018160A2
WO2006018160A2 PCT/EP2005/008514 EP2005008514W WO2006018160A2 WO 2006018160 A2 WO2006018160 A2 WO 2006018160A2 EP 2005008514 W EP2005008514 W EP 2005008514W WO 2006018160 A2 WO2006018160 A2 WO 2006018160A2
Authority
WO
WIPO (PCT)
Prior art keywords
lighting device
partial surface
led
light
leds
Prior art date
Application number
PCT/EP2005/008514
Other languages
German (de)
French (fr)
Other versions
WO2006018160A3 (en
Inventor
Viktor Malecki
Wolfgang FÖRSTER
Josef Irlbacher
Original Assignee
Emz-Hanauer Gmbh & Co. Kgaa.
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
Priority claimed from EP04019053A external-priority patent/EP1508760A3/en
Application filed by Emz-Hanauer Gmbh & Co. Kgaa. filed Critical Emz-Hanauer Gmbh & Co. Kgaa.
Publication of WO2006018160A2 publication Critical patent/WO2006018160A2/en
Publication of WO2006018160A3 publication Critical patent/WO2006018160A3/en

Links

Classifications

    • 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
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/503—Cooling arrangements characterised by the adaptation for cooling of specific components of light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40—Cooling of lighting devices
    • F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/505—Cooling arrangements characterised by the adaptation for cooling of specific components of reflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0085—Means for removing heat created by the light source from the package
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—Light emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors
    • 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
    • F21V2200/00—Use of light guides, e.g. fibre optic devices, in lighting devices or systems
    • F21V2200/10—Use of light guides, e.g. fibre optic devices, in lighting devices or systems of light guides of the optical fibres type
    • F21V2200/15—Use of light guides, e.g. fibre optic devices, in lighting devices or systems of light guides of the optical fibres type the light being emitted along at least a portion of the outer surface of the guide
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/005—Reflectors for light sources with an elongated shape to cooperate with linear light sources
    • 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
    • F21W2131/30—Lighting for domestic or personal use
    • F21W2131/305—Lighting for domestic or personal use for refrigerators
    • 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]
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0073—Light emitting diode [LED]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S362/00—Illumination
    • Y10S362/80—Light emitting diode

Definitions

  • the invention relates to a lighting device for a cooling device, in particular a special refrigerator or the like, ie, for example, a refrigerated shelf, deep freezer or freezer.
  • a lighting device for a cooling device, in particular a special refrigerator or the like, ie, for example, a refrigerated shelf, deep freezer or freezer.
  • at least the illumination device comprises an elongated transparent body and at least one LED, which is arranged on or near an end face of the body f is to be coupled to light emitted from the LED light into the body, wherein a lengthwise direction of the body occidentalre ⁇ ADORABLE first partial area of the Surface of the body is designed to scatter in the body Lucaskoppeites light and / or break and / or reflect that it is directed in the direction of one of the first partial surface opposite second Operaflä ⁇ surface of the body and exits the body.
  • LEDs have been available as highly effective light sources, ie semiconductor components which emit light when the current flows.
  • a lighting device of the type mentioned is known from US 2003/0072147 Al. There, light is coupled into a transparent body by means of a plurality of LEDs, and a partial surface of the body is covered with color in order to direct light to the opposite side, where the light emerges from the body for illumination purposes.
  • DE 198 03 518 A1 describes a rod-shaped light guide, which is likewise provided on one edge with prism-shaped indentations in order to re fl ect light thereon.
  • DE 72 44 920 U1 describes an illumination device for a refrigerator, in which a light source is arranged in the wall of the refrigerator, from which light is coupled into an optical waveguide rail, which is provided with a plurality of notches in order to light it inside the fridge.
  • the object of the invention is to design a lighting device of the type mentioned in the introduction in such a way that, when mounted in a simple manner, a high service life of the LEDs is achieved with a simultaneously good optical effect.
  • the invention teaches a lighting device for a cooling device, in particular a refrigerator, with at least one elongated transparent body, at least one LED, which is arranged on or near an end face of the body, to light emitted by the LED light in the body coupled, wherein a extending in the longitudinal direction of the body first partial surface of the surface of the body is designed to scatter in the body coupled light so and / or break and / or to reflect that towards one of the first partial surface opposite second surface of the body is directed and exits the body, wherein the LED is on its side facing away from the body in good heat-conducting contact with a baffle, the first part surface extends substantially overlapping along this.
  • the guide plate according to the invention fulfills thermal and / or optical purposes.
  • the baffle In terms of heat technology, it serves to distribute the heat generated by the LED over a large area and thus extend the life of the LED. Also unwanted temperature gradients in the wall of the refrigerator are largely reduced. Visually, the baffle can be used to influence light in the desired manner by reflection and / or coloring.
  • the transparent body is cylindrical and said first partial surface is geometrically defined according to a section through the cylinder obliquely to its longitudinal axis.
  • a homogeneous distribution of the light is achieved in a very simple manner, in particular when the first partial area is provided with color strips transversely to the longitudinal direction of the body, at which the light is scattered.
  • a largely uniform emission of the light over the entire longitudinal extent of the transparent body can be achieved.
  • a particular embodiment of the invention provides that two transparent bodies are arranged coaxially in a housing. This allows a very elongated distribution of the light and thus a very uniform and comprehensive Aus ⁇ illumination of the interior of the cabinet.
  • LEDs are preferably arranged on the common axis of both bodies, either on the outside of the end faces of the body, ie on the sides facing away from each other, or preferably, at the mutually facing ends of the two bodies.
  • the last-mentioned arrangement makes possible a simplified electrical supply and supply of the LEDs and moreover a space-saving design of the housing in which the transparent bodies and the LEDs are arranged.
  • the invention also relates to the transparent body as such, which is cylindrical in shape and provided with a first partial surface, which is the coupled-in light scatters or reflects, so that it exits the body, said first Operaflä ⁇ surface is defined according to a section through the cylinder obliquely to its longitudinal axis.
  • this partial surface it is preferable to apply color stripes on which light entering or entering the body is scattered or reflected.
  • These color stripes can be arranged, for example, in the longitudinal direction or preferably in the transverse direction, relative to the longitudinal axis, at different distances in each case in order to control the amounts of light.
  • Figure 1 shows a first embodiment of a lighting device in the wall of a refrigerator
  • Figure 2 shows another embodiment of a lighting device with a transparent body
  • FIG. 3 shows a further exemplary embodiment of a lighting device with two transparent bodies and a central arrangement of LEDs
  • Figure 4 shows an embodiment of a transparent body.
  • a lighting device is installed in the wall 10 of a refrigerator.
  • the illumination device has two coaxially arranged, elongate transparent bodies 12 which have a cylindrical shape, preferably a circular cylindrical shape. At the outer ends of the transparent body 12, 14, an LED 16 and 18 is arranged in each case so that the light emitted by the LED is largely coupled into the body 12 and 14 respectively.
  • Each of the LEDs is connected to a baffle 20 or 22 good thermal conductivity, so that heat is distributed over a large area over the baffles during operation of the LEDs.
  • the width of the baffles 20, 22 (ie, their dimension perpendicular to the plane of the drawing) is chosen in the embodiment so that the baffle substantially covers the associated body, for example, the width of a baffle about the diameter of the body 12 and 14 in this Direction speak. Also in the longitudinal direction cover the baffles 20, 22, the body 12 and 14 substantially over its entire longitudinal extent. A particular embodiment of the bodies 12 and 14 will be described in more detail below with reference to FIG.
  • the above-described components 12, 14, 16, 18, 20, 22 are arranged in a housing 24 made of plastic, and are pre-assembled before installation in theisser ⁇ cabinet wall 20 as a completed assembly.
  • the plastic housing 24 is inserted into a precisely fitting recess 26 in the refrigerator wall 20.
  • the housing 24 has cover frames 28, 30, so that the housing 24 can be fastened to the refrigerator wall 10 by means of screws 32, 34.
  • the housing 24 is open on its side facing the interior of the refrigerator (in FIG. 1 at the top) so that light emerging from the bodies 12, 14 illuminates the inner space of the refrigerator.
  • This opening in the housing 24 is surrounded by an edge 36, which is supported on the edge of the recess 26 in theisser ⁇ cabinet wall 10.
  • 22 ridges 38 project into the interior of the housing 24 at which support the said components.
  • FIG. 1 the two LEDs 16, 18 are located at the outer front ends of the coaxially arranged transparent bodies 12, 14.
  • Figure 2 shows a modified embodiment of a lighting device with only a transparent body 50, an LED 52, a baffle 54, a good heat conducting contact 56, a holder 58, and a coating 66 on the baffle 54.
  • the coating 60 may, for example, a mirror coating 2, so that light is directed in an effective manner in the desired direction, in Figure 2 upwards, ' analogous to Figure 1 in the interior of the refrigerator.
  • a lighting device according to FIG. 2 similar to the arrangement according to FIG. 1 with the holder 58 is mounted in a recess in a refrigerator wall (not shown in FIG. 2).
  • the baffle 54, the heat-conducting contact 56, the LED 52 and the transparent body 50 form an assembly which in this composition is held together by the holder 58.
  • the holder 58 can then be inserted into a suitable housing together with the named components, for example corresponding to the housing 36 according to FIG. 1, so that then the illumination device as a whole extends into a depression in a refrigerator wall (not shown in FIG. 2). can be used.
  • the construction described with the holder 58 makes it possible to press the transparent body 50 with good adhesion against the LED 52, wherein the baffle 54, which is fixedly connected to the holder 58, forms a stable abutment.
  • the LEDs 16, 18, 52 are supplied with electrical supply lines from the wall 10 of the refrigerator.
  • the baffles 20, 22, 54 are preferably made of a good heat-conducting Me ⁇ tall, such as copper, optionally with a mirror coating on its side facing the transparent body.
  • FIG. 3 shows a modification of the exemplary embodiment according to FIG. 1, wherein components of the same function or function similar to one another are denoted by the same reference numerals are provided, possibly supplemented by a dash.
  • the two LEDs 16 ', 18' are respectively arranged on the mutually facing end surfaces of the transparent bodies. This allows compact accommodation of the LEDs 16 ', 18' in the smallest space and allows a very simple arrangement of the electrical supply lines.
  • Two webs 66, 68 of the housing 24 support the transparent bodies at their ends remote from the LEDs 16 ', 18'.
  • the exemplary embodiment according to FIG. 3 corresponds to the above-described exemplary embodiment according to FIG. 1, so that a repeated description can be dispensed with.
  • FIG. 4 schematically shows a transparent body 12 which can be used in the lighting devices according to FIGS. 1, 2 and 3 (reference numerals 12, 14, 50).
  • the transparent body of, for example, acrylic or the like, has a substantially circular cylindrical shape, wherein a first partial surface 70 is formed by a section through the cylinder obliquely to its longitudinal axis.
  • the first partial surface 70 is designed in such a way that light of an LED coupled into the body is scattered and / or broken and / or reflected, in such a way that it extends beyond the first partial surface 70 opposite the second partial surface 72 of the body aus ⁇ occurs.
  • the first partial surface 70 would be arranged at the bottom and the second partial surface 72 at the top would be arranged in the direction of the interior of the refrigerator.
  • an LED is mounted on the lower end face 76 of the body, so that there the light is coupled into the body.
  • the first partial surface 70 then effects a reflection of the coupled-in radiation in the direction of the opposite second partial surface 72 via a strip-shaped ink application 78.
  • the illustrated design of the first partial surface 70 which widens in the direction of the end surface 74 opposite the LED causes that light is directed as far as possible homogeneously (uniformly) in the direction of the second partial surface 72.
  • the colored stripes 78 which are preferably white, have different longitudinal dimensions, so that a desired optical Effect is achieved in the illumination of the refrigerator interior. If necessary, light passing between the strips 78 to the rear (downward in FIGS. 1 to 3) is reflected on the mirrored surface of one of the baffles and thus likewise reaches the interior.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

The invention relates to a lighting device for a refrigerating device, particularly a refrigerator, comprising at least one elongate transparent body (12, 14), at least one LED (16, 18) which is arranged on or in the vicinity of a front surface (74, 76) of the body in order to inject light emitted by the LED into the body, wherein a first partial surface (70) of the surface of the body, which extends in the longitudinal direction of the body, is embodied, in order to scatter and/or refract and/or reflect the light injected into the body in such a way that it is guided towards a second partial surface of the body (72) opposite the first partial surface in order to exit from said body, wherein good heat-conduction can occur between the LED (16,18) on the side thereof facing away from the body (12,14) and a guide plate (20, 22) extending along the first partial surface (70) in a substantially overlapping manner.

Description

Beleuchtungsvorrichtung für eine Kühleinrichtung Lighting device for a cooling device

Die Erfindung betrifft eine Beleuchtungsvorrichtung für eine Kühleinrichtung, insbe¬ sondere einen Kühlschrank oder dergleichen, d.h. zum Beispiel ein Kühlregal, Tief- kühlfach oder Tiefkühlschrank. Dabei weist die Beleuchtungsvorrichtung zumindest einen langgestreckten transparenten Körper auf und zumindest eine LED, die an oder nahe einer Stirnfläche des Körpers angeordnet istf um von der LED emittiertes Licht in den Körper einzukoppeln, wobei eine sich in Längsrichtung des Körpers erstre¬ ckende erste Teilfläche der Oberfläche des Körpers gestaltet ist, um in den Körper eingekoppeites Licht so zu streuen und/oder zu brechen und/oder zu reflektieren, dass es in Richtung auf eine der ersten Teilfläche gegenüberliegende zweite Teilflä¬ che des Körpers gelenkt wird und aus dem Körper austritt.The invention relates to a lighting device for a cooling device, in particular a special refrigerator or the like, ie, for example, a refrigerated shelf, deep freezer or freezer. In this case, at least the illumination device comprises an elongated transparent body and at least one LED, which is arranged on or near an end face of the body f is to be coupled to light emitted from the LED light into the body, wherein a lengthwise direction of the body erstre¬ ADORABLE first partial area of the Surface of the body is designed to scatter in the body eingekoppeites light and / or break and / or reflect that it is directed in the direction of one of the first partial surface opposite second Teilflä¬ surface of the body and exits the body.

Bei einer Vielzahl von Anwendungen, nicht nur bei Kühlmöbeln oder dergleichen, ist eine effektive Verteilung der erzeugten elektromagnetischen Strahlung (hier als Licht bezeichnet) gefordert. Die Strahlung muss im auszuleuchtenden Bereich möglichst gleichmäßig und ohne Blendwirkung verteilt werden.In a variety of applications, not just refrigerators or the like, effective distribution of the generated electromagnetic radiation (referred to herein as light) is required. The radiation must be distributed as uniformly as possible and without glare in the area to be illuminated.

Als höchst effektive Lichtquellen stehen seit einiger Zeit sogenannte LEDs zur Verfü- gung, also Halbleiterbauelemente, die bei Stromfluss Licht aussenden.For some time now, so-called LEDs have been available as highly effective light sources, ie semiconductor components which emit light when the current flows.

Eine Beleuchtungsvorrichtung der eingangs genannten Art ist aus der US 2003/0072147 Al bekannt. Dort wird mittels einer Mehrzahl von LEDs Licht in einen transparenten Körper eingekoppelt und eine Teilfläche des Körpers ist mit Far- be belegt, um Licht auf die gegenüberliegenden Seite zu lenken, wo das Licht aus dem Körper zu Beleuchtungszwecken austritt.A lighting device of the type mentioned is known from US 2003/0072147 Al. There, light is coupled into a transparent body by means of a plurality of LEDs, and a partial surface of the body is covered with color in order to direct light to the opposite side, where the light emerges from the body for illumination purposes.

Die Veröffentlichung von A.M. Blumenfeld und S.E. Jones in der Zeitschrift MASCHI¬ NE DESIGN, „Parts that gloW", Oktober 1959, S. 94-103, beschreibt allgemein die Einkopplung von Licht in langgestreckte transparente Körper und damit verbundene verschiedene Beleuchtungstechniken. Die US 6,601,984 B2 zeigt ebenfalls eine Beleuchtungsvorrichtung mit einem langge¬ streckten transparenten Körper, in dessen Stirnfläche (n) aus LEDs Licht eingekop¬ pelt wird. Um das Licht aus dem transparenten Körper herauszuleiten, sind im Körper eine Vielzahl von Einkerbungen vorgesehen, an denen das Licht reflektiert wird.The publication of AM Blumenfeld and SE Jones in the journal MASCHI NE DESIGN, "Parts that GloW", October 1959, pp. 94-103, generally describes the coupling of light into elongated transparent bodies and associated various illumination techniques. US Pat. No. 6,601,984 B2 likewise shows an illumination device with an elongate transparent body in whose end face (s) light is coupled from LEDs. In order to lead the light out of the transparent body, a multiplicity of indentations are provided in the body, at which the light is reflected.

Die DE 198 03 518 Al beschreibt einen stabförmigen Lichtleiter, der ebenfalls an einem Rand mit prismenförmigen Einkerbungen versehen ist, um Licht daran zu re¬ flektieren.DE 198 03 518 A1 describes a rod-shaped light guide, which is likewise provided on one edge with prism-shaped indentations in order to re fl ect light thereon.

Die DE 72 44 920 Ul beschreibt eine Beleuchtungseinrichtung für einen Kühlschrank, bei der eine Lichtquelle in der Wandung des Kühlschrankes angeordnet ist, aus wel¬ cher Licht in eine Lichtleiterschiene eingekoppelt wird, die mit einer Vielzahl von Ein¬ kerbungen versehen ist, um das Licht im Inneren des Kühlschranks zu verteilen.DE 72 44 920 U1 describes an illumination device for a refrigerator, in which a light source is arranged in the wall of the refrigerator, from which light is coupled into an optical waveguide rail, which is provided with a plurality of notches in order to light it inside the fridge.

Der Erfindung liegt die Aufgabe zugrunde, eine Beleuchtungsvorrichtung der ein¬ gangs genannten Art so auszugestalten, dass bei einfacher Montage eine hohe Le¬ bensdauer der LEDs bei gleichzeitig guter optischer Wirkung erreicht wird.The object of the invention is to design a lighting device of the type mentioned in the introduction in such a way that, when mounted in a simple manner, a high service life of the LEDs is achieved with a simultaneously good optical effect.

Zu Lösung dieser Aufgabe lehrt die Erfindung eine Beleuchtungsvorrichtung für eine Kühleinrichtung, insbesondere einen Kühlschrank, mit zumindest einem langgestreck¬ ten transparenten Körper, zumindest einer LED, die an oder nahe einer Stirnfläche des Körpers angeordnet ist, um von der LED emittiertes Licht in den Körper einzu- koppeln, wobei eine sich in Längsrichtung des Körpers erstreckende erste Teilfläche der Oberfläche des Körpers gestaltet ist, um in den Körper eingekoppeltes Licht so zu streuen und/oder zu brechen und/oder zu reflektieren, dass es in Richtung auf eine der ersten Teilfläche gegenüberliegende zweite Teilfläche des Körpers gelenkt wird und aus dem Körper austritt, wobei die LED auf ihrer vom Körper abgekehrten Seite in gut wärmeleitendem Kontakt mit einem Leitblech steht, das sich die erste Teilflä- che im wesentlichen überdeckend entlang dieser erstreckt. Das erfindungsgemäße Leitblech erfüllt wärmetechnische und/oder optische Zwecke. Wärmetechnisch dient es dazu, die von der LED erzeugte Wärme großflächig zu ver¬ teilen und so die Lebensdauer der LED zu verlängern. Auch werden unerwünschte Temperaturgradienten in der Wand des Kühlschrankes weitgehend reduziert. Optisch kann des Leitblech dazu dienen, Licht in gewünschter Weise durch Reflexion und/oder Farbgebung zu beeinflussen.To solve this object, the invention teaches a lighting device for a cooling device, in particular a refrigerator, with at least one elongated transparent body, at least one LED, which is arranged on or near an end face of the body, to light emitted by the LED light in the body coupled, wherein a extending in the longitudinal direction of the body first partial surface of the surface of the body is designed to scatter in the body coupled light so and / or break and / or to reflect that towards one of the first partial surface opposite second surface of the body is directed and exits the body, wherein the LED is on its side facing away from the body in good heat-conducting contact with a baffle, the first part surface extends substantially overlapping along this. The guide plate according to the invention fulfills thermal and / or optical purposes. In terms of heat technology, it serves to distribute the heat generated by the LED over a large area and thus extend the life of the LED. Also unwanted temperature gradients in the wall of the refrigerator are largely reduced. Visually, the baffle can be used to influence light in the desired manner by reflection and / or coloring.

Gemäß einer bevorzugten Ausgestaltung der Erfindung ist vorgesehen, dass der transparente Körper zylinderförmig ist und die genannte erste Teilfläche geometrisch entsprechend einem Schnitt durch den Zylinder schräg zu dessen Längsachse defi¬ niert ist. Bei dieser Ausgestaltung des transparenten Körpers wird in sehr einfacher Weise eine homogene Verteilung des Lichtes erreicht, insbesondere dann, wenn die erste Teilfläche mit Farbstreifen quer zur Längsrichtung des Körpers versehen ist, an denen das Licht gestreut wird. Damit kann eine weitgehend gleichmäßige Emission des Lichtes über die gesamte Längserstreckung des transparenten Körpers erreicht werden.According to a preferred embodiment of the invention, it is provided that the transparent body is cylindrical and said first partial surface is geometrically defined according to a section through the cylinder obliquely to its longitudinal axis. In this embodiment of the transparent body, a homogeneous distribution of the light is achieved in a very simple manner, in particular when the first partial area is provided with color strips transversely to the longitudinal direction of the body, at which the light is scattered. Thus, a largely uniform emission of the light over the entire longitudinal extent of the transparent body can be achieved.

Eine besondere Ausgestaltung der Erfindung sieht vor, dass in einem Gehäuse zwei transparente Körper koaxial angeordnet sind. Dies ermöglicht eine sehr langgestreck- te Verteilung des Lichtes und damit eine sehr gleichmäßige und umfassende Aus¬ leuchtung des Innenraumes des Kühlmöbels. Bei einer solchen koaxialen Anordnung der transparenten Körper sind LEDs bevorzugt auf der gemeinsamen Achse beider Körper angeordnet, entweder außenseitig an den Stirnflächen der Körper, also an den voneinander abgekehrten Seiten, oder bevorzugt, an den einander zugekehrten Enden der beiden Körper. Die letztgenannte Anordnung ermöglicht insbesondere eine vereinfachte elektrische Zuleitung und Versorgung der LEDs und überdies auch eine platzsparende Gestaltung des Gehäuses, in dem die transparenten Körper und die LEDs angeordnet sind.A particular embodiment of the invention provides that two transparent bodies are arranged coaxially in a housing. This allows a very elongated distribution of the light and thus a very uniform and comprehensive Aus¬ illumination of the interior of the cabinet. In such a coaxial arrangement of the transparent body LEDs are preferably arranged on the common axis of both bodies, either on the outside of the end faces of the body, ie on the sides facing away from each other, or preferably, at the mutually facing ends of the two bodies. In particular, the last-mentioned arrangement makes possible a simplified electrical supply and supply of the LEDs and moreover a space-saving design of the housing in which the transparent bodies and the LEDs are arranged.

Die Erfindung betrifft auch den transparenten Körper als solchen, der zylinderförmig gestaltet und mit einer ersten Teilfläche versehen ist, die das eingekoppelte Licht streut oder reflektiert, sodass es aus dem Körper austritt, wobei diese erste Teilflä¬ che entsprechend einem Schnitt durch den Zylinder schräg zu dessen Längsachse definiert ist. Auf dieser Teilfläche können bevorzugt Farbstreifen angebracht werden, an denen in den Körper eintretendes Licht gestreut oder reflektiert wird. Diese Farb- streifen können zum Beispiel in Längsrichtung oder bevorzugt in Querrichtung, bezo¬ gen auf die Längsachse, mit unterschiedlichen Abständen jeweils angeordnet werden, um die Lichtmengen zu steuern.The invention also relates to the transparent body as such, which is cylindrical in shape and provided with a first partial surface, which is the coupled-in light scatters or reflects, so that it exits the body, said first Teilflä¬ surface is defined according to a section through the cylinder obliquely to its longitudinal axis. On this partial surface, it is preferable to apply color stripes on which light entering or entering the body is scattered or reflected. These color stripes can be arranged, for example, in the longitudinal direction or preferably in the transverse direction, relative to the longitudinal axis, at different distances in each case in order to control the amounts of light.

Nachfolgend werden Ausführungsbeispiele der Erfindung anhand der Zeichnung nä- her erläutert. Es zeigen:Exemplary embodiments of the invention will be explained in more detail below with reference to the drawing. Show it:

Figur 1 ein erstes Ausführungsbeispiel einer Beleuchtungsvorrichtung in der Wand eines Kühlschrankes;Figure 1 shows a first embodiment of a lighting device in the wall of a refrigerator;

Figur 2 ein weiteres Ausführungsbeispiel einer Beleuchtungsvorrichtung mit einem transparenten Körper;Figure 2 shows another embodiment of a lighting device with a transparent body;

Figur 3 ein weiteres Ausführungsbeispiel einer Beleuchtungsvorrichtung mit zwei transparenten Körpern und zentraler Anordnung von LEDs; undFIG. 3 shows a further exemplary embodiment of a lighting device with two transparent bodies and a central arrangement of LEDs; and

Figur 4 ein Ausführungsbeispiel eines transparenten Körpers.Figure 4 shows an embodiment of a transparent body.

Gemäß Figur 1 wird in der Wand 10 eines Kühlschrankes eine Beleuchtungsvorrich¬ tung installiert.According to FIG. 1, a lighting device is installed in the wall 10 of a refrigerator.

Die Beleuchtungsvorrichtung weist zwei koaxial angeordnete, langgestreckte transpa¬ rente Körper 12 auf, die Zylinderform haben, vorzugsweise Kreiszylinderform. An den äußeren Stirnenden der transparenten Körper 12, 14 ist jeweils eine LED 16 bzw. 18 so angeordnet, dass das von der LED emittierte Licht weitgehend in den Körper 12 bzw. 14 eingekoppelt wird. Jede der LEDs ist mit einem Leitblech 20 bzw. 22 gut wärmeleitend verbunden,, so- dass beim Betrieb der LEDs entstehende Wärme großflächig über die Leitbleche ver¬ teilt wird. Die Breite der Leitbleche 20, 22 (also ihre Dimension senkrecht zur Zeichnungsebene) ist bei dem Ausführungsbeispiel so gewählt, dass das Leitblech den zugehörigen Körper im wesentlichen abdeckt, zum Beispiel kann die Breite eines Leitbleches etwa dem Durchmesser der Körper 12 bzw. 14 in dieser Richtung ent¬ sprechen. Auch in Längsrichtung decken die Leitbleche 20, 22 die Körper 12 bzw. 14 im wesentlichen über deren gesamte Längserstreckung ab. Eine besondere Ausges¬ taltung der Körper 12 und 14 wird weiter unten anhand der Figur 4 näher beschrie- ben.The illumination device has two coaxially arranged, elongate transparent bodies 12 which have a cylindrical shape, preferably a circular cylindrical shape. At the outer ends of the transparent body 12, 14, an LED 16 and 18 is arranged in each case so that the light emitted by the LED is largely coupled into the body 12 and 14 respectively. Each of the LEDs is connected to a baffle 20 or 22 good thermal conductivity, so that heat is distributed over a large area over the baffles during operation of the LEDs. The width of the baffles 20, 22 (ie, their dimension perpendicular to the plane of the drawing) is chosen in the embodiment so that the baffle substantially covers the associated body, for example, the width of a baffle about the diameter of the body 12 and 14 in this Direction speak. Also in the longitudinal direction cover the baffles 20, 22, the body 12 and 14 substantially over its entire longitudinal extent. A particular embodiment of the bodies 12 and 14 will be described in more detail below with reference to FIG.

Die vorstehend beschriebenen Komponenten 12, 14, 16, 18, 20, 22 sind in einem Gehäuse 24 aus Kunststoff angeordnet, und werden vor dem Einbau in die Kühl¬ schrankwand 20 als abgeschlossene Baugruppe vormontiert. Das Kunststoffgehäuse 24 wird in eine passgenaue Vertiefung 26 in der Kühlschrankwand 20 eingesetzt. Das Gehäuse 24 weist Abdeckrahmen 28, 30 auf, sodass das Gehäuse 24 mittels Schrau¬ ben 32, 34 an der Kühlschrankwand 10 befestigbar ist.The above-described components 12, 14, 16, 18, 20, 22 are arranged in a housing 24 made of plastic, and are pre-assembled before installation in the Kühl¬ cabinet wall 20 as a completed assembly. The plastic housing 24 is inserted into a precisely fitting recess 26 in the refrigerator wall 20. The housing 24 has cover frames 28, 30, so that the housing 24 can be fastened to the refrigerator wall 10 by means of screws 32, 34.

Das Gehäuse 24 ist auf seiner dem Inneren des Kühlschrankes zugekehrten Seite (in Figur 1 also oben) offen, sodass aus den Körpern 12, 14 austretendes Licht den In¬ nenraum des Kühlschrankes ausleuchtet. Diese Öffnung im Gehäuse 24 wird von einem Rand 36 umgeben, der sich auf dem Rand der Vertiefung 26 in der Kühl¬ schrankwand 10 abstützt. Zur stabileren Montage sowohl der transparenten Körper 12, 14 als auch der Leitbleche 20, 22 ragen Stege 38 in das Innere des Gehäuses 24 an denen sich die genannten Bauteile abstützen.The housing 24 is open on its side facing the interior of the refrigerator (in FIG. 1 at the top) so that light emerging from the bodies 12, 14 illuminates the inner space of the refrigerator. This opening in the housing 24 is surrounded by an edge 36, which is supported on the edge of the recess 26 in the Kühl¬ cabinet wall 10. For more stable mounting of both the transparent body 12, 14 and the baffles 20, 22 ridges 38 project into the interior of the housing 24 at which support the said components.

Zwischen den LEDs 16, 18 und den Leitblechen 20, 22 sind gut wärmeleitenden Kon¬ takte 40, 42 vorgesehen.Between the LEDs 16, 18 and the baffles 20, 22 are good thermally conductive Kon¬ clocks 40, 42 are provided.

Bei der Ausführungsform gemäß Figur 1 befinden sich die beiden LEDs 16, 18 an den äußeren Stirnenden der koaxial angeordneten transparenten Körper 12, 14. Figur 2 zeigt eine abgewandelte Ausführungsform einer Beleuchtungsvorrichtung mit nur einem transparenten Körper 50, einer LED 52, einem Leitblech 54, einem gut wärmeleitenden Kontakt 56, eine Halterung 58, und einer Beschichtung 66 auf dem Leitblech 54. Die Beschichtung 60 kann zum Beispiel eine Verspiegelung sein, sodass Licht in effektiver Weise in die gewünschte Richtung gelenkt wird, in Figur 2 nach oben, 'analog Figur 1 in das Innere des Kühlschranks. Ansonsten wird eine Beleuch¬ tungsvorrichtung gemäß Figur 2 ähnlich der Anordnung gemäß Figur 1 mit der Halte¬ rung 58 in einer Vertiefung in einer Kühlschrankwand (in Figur 2 nicht gezeigt) montiert.In the embodiment according to FIG. 1, the two LEDs 16, 18 are located at the outer front ends of the coaxially arranged transparent bodies 12, 14. Figure 2 shows a modified embodiment of a lighting device with only a transparent body 50, an LED 52, a baffle 54, a good heat conducting contact 56, a holder 58, and a coating 66 on the baffle 54. The coating 60 may, for example, a mirror coating 2, so that light is directed in an effective manner in the desired direction, in Figure 2 upwards, ' analogous to Figure 1 in the interior of the refrigerator. Otherwise, a lighting device according to FIG. 2 similar to the arrangement according to FIG. 1 with the holder 58 is mounted in a recess in a refrigerator wall (not shown in FIG. 2).

Gemäß Figur 2 bilden das Leitblech 54, der wärmeleitende Kontakt 56, die LED 52 und der transparente Körper 50 eine Baugruppe, die in dieser Zusammensetzung durch die Halterung 58 zusammengehalten wird. Die Halterung 58 kann dann insge- samt mit den genannten Bauteilen in ein geeignetes Gehäuse eingesetzt werden, etwa entsprechend dem Gehäuse 36 nach Figur 1, sodass dann die Beleuchtungsvor¬ richtung insgesamt in eine Vertiefung in einer Kühlschrankwand (in Figur 2 nicht ge¬ zeigt) eingesetzt werden kann. Die beschriebene Konstruktion mit der Halterung 58 ermöglicht es, den transparenten Körper 50 mit gutem Kraftschluss gegen die LED 52 zu drücken, wobei das Leitblech 54, das fest mit der Halterung 58 verbunden ist, ein stabiles Widerlager bildet.According to FIG. 2, the baffle 54, the heat-conducting contact 56, the LED 52 and the transparent body 50 form an assembly which in this composition is held together by the holder 58. The holder 58 can then be inserted into a suitable housing together with the named components, for example corresponding to the housing 36 according to FIG. 1, so that then the illumination device as a whole extends into a depression in a refrigerator wall (not shown in FIG. 2). can be used. The construction described with the holder 58 makes it possible to press the transparent body 50 with good adhesion against the LED 52, wherein the baffle 54, which is fixedly connected to the holder 58, forms a stable abutment.

Bei den Ausführungsbeispielen gemäß Figur 1 und Figur 2 werden die LEDs 16, 18, 52 über elektrische Zuführieitungen aus der Wand 10 des Kühlschrankes versorgt.In the embodiments according to FIG. 1 and FIG. 2, the LEDs 16, 18, 52 are supplied with electrical supply lines from the wall 10 of the refrigerator.

Die Leitbleche 20, 22, 54 bestehen vorzugsweise aus einem gut wärmeleitenden Me¬ tall, wie Kupfer, gegebenenfalls mit einer Verspiegelung auf ihrer dem transparenten Körper zugekehrten Seite.The baffles 20, 22, 54 are preferably made of a good heat-conducting Me¬ tall, such as copper, optionally with a mirror coating on its side facing the transparent body.

Figur 3 zeigt eine Abwandlung des Ausführungsbeispieles nach Figur 1, wobei einan¬ der funktionsgleiche oder funktionsähnliche Bauteile mit den gleichen Bezugszeichen versehen sind,, gegebenenfalls um einen Strich ergänzt. Beim Ausführungsbeispiel nach Figur 3 sind die beiden LEDs 16', 18' jeweils an den einander zugekehrten Stirn¬ flächen der transparenten Körper angeordnet. Dies ermöglicht eine kompakte Unter¬ bringung der LEDs 16', 18' auf engstem Raum und erlaubt eine sehr einfache Anordnung der elektrischen Zuführleitungen. Zwei Stege 66, 68 des Gehäuses 24 stützen die transparenten Körper an ihren von den LEDs 16', 18' entfernten Enden ab. Ansonsten entspricht das Ausführungsbeispiel gemäß Figur 3 dem oben be¬ schriebenen Ausführungsbeispiel gemäß Figur 1, sodass auf eine wiederholte Be¬ schreibung verzichtet werden kann.FIG. 3 shows a modification of the exemplary embodiment according to FIG. 1, wherein components of the same function or function similar to one another are denoted by the same reference numerals are provided, possibly supplemented by a dash. In the embodiment according to FIG. 3, the two LEDs 16 ', 18' are respectively arranged on the mutually facing end surfaces of the transparent bodies. This allows compact accommodation of the LEDs 16 ', 18' in the smallest space and allows a very simple arrangement of the electrical supply lines. Two webs 66, 68 of the housing 24 support the transparent bodies at their ends remote from the LEDs 16 ', 18'. Otherwise, the exemplary embodiment according to FIG. 3 corresponds to the above-described exemplary embodiment according to FIG. 1, so that a repeated description can be dispensed with.

Figur 4 zeigt schematisch einen transparenten Körper 12, der in den Beleuchtungs¬ vorrichtungen gemäß den Figuren 1, 2 und 3 (Bezugszeichen 12, 14, 50) verwendet werden kann. Der transparente Körper aus zum Beispiel Acryl oder dergleichen, hat im wesentlichen Kreiszylinderform, wobei eine erste Teilfläche 70 durch einen Schnitt durch den Zylinder schräg zu dessen Längsachse gebildet ist. Die erste Teilfläche 70 ist so gestaltet, dass in den Körper eingekoppeltes Licht einer LED gestreut und/oder gebrochen und/oder reflektiert wird, und zwar so, dass es über eine der ersten Teil¬ fläche 70 gegenüberliegende zweite Teilfläche 72 des Körpers aus dem Körper aus¬ tritt. Bei den Beleuchtungsvorrichtungen gemäß den Figuren 1, 2 und 3 wäre also die erste Teilfläche 70 unten angeordnet und die zweite Teilfläche 72 oben in Richtung auf den Innenraum des Kühlschrankes.FIG. 4 schematically shows a transparent body 12 which can be used in the lighting devices according to FIGS. 1, 2 and 3 (reference numerals 12, 14, 50). The transparent body of, for example, acrylic or the like, has a substantially circular cylindrical shape, wherein a first partial surface 70 is formed by a section through the cylinder obliquely to its longitudinal axis. The first partial surface 70 is designed in such a way that light of an LED coupled into the body is scattered and / or broken and / or reflected, in such a way that it extends beyond the first partial surface 70 opposite the second partial surface 72 of the body aus¬ occurs. In the lighting devices according to FIGS. 1, 2 and 3, therefore, the first partial surface 70 would be arranged at the bottom and the second partial surface 72 at the top would be arranged in the direction of the interior of the refrigerator.

Beim Ausführungsbeispiel des transparenten Körpers 12 gemäß Figur 4 wird eine LED an der unteren Stirnfläche 76 des Körpers montiert, sodass dort das Licht in den Körper eingekoppelt wird. Die erste Teilfläche 70 bewirkt dann über einen streifen¬ förmigen Farbauftrag 78 eine Reflexion der eingekoppelten Strahlung in Richtung auf die gegenüberliegende zweite Teilfläche 72. Die dargestellte Gestaltung der ersten Teilfläche 70, die sich in Richtung auf die der LED gegenüberliegende Stirnfläche 74 aufweitet, bewirkt, dass Licht weitestgehend homogen (gleichmäßig) in Richtung auf die zweite Teilfläche 72 gelenkt wird. Die farbigen Streifen 78, die bevorzugt weiß sind, haben unterschiedliche Längsabmessungen, sodass ein gewünschter optischer Effekt bei der Ausleuchtung des Kühlschrankinnenraumes erzielt wird. Zwischen den Streifen 78 nach hinten (in den Figuren 1 bis 3 nach unten) gelangendes Licht wird gegebenenfalls an der verspiegelten Fläche eines der Leitbleche reflektiert und ge¬ langt auf diese Weise ebenfalls in den Innenraurn. In the embodiment of the transparent body 12 according to Figure 4, an LED is mounted on the lower end face 76 of the body, so that there the light is coupled into the body. The first partial surface 70 then effects a reflection of the coupled-in radiation in the direction of the opposite second partial surface 72 via a strip-shaped ink application 78. The illustrated design of the first partial surface 70 which widens in the direction of the end surface 74 opposite the LED causes that light is directed as far as possible homogeneously (uniformly) in the direction of the second partial surface 72. The colored stripes 78, which are preferably white, have different longitudinal dimensions, so that a desired optical Effect is achieved in the illumination of the refrigerator interior. If necessary, light passing between the strips 78 to the rear (downward in FIGS. 1 to 3) is reflected on the mirrored surface of one of the baffles and thus likewise reaches the interior.

Claims

Patentansprüche claims 1. Beleuchtungsvorrichtung für eine Kühleinrichtung, insbesondere einen Kühl¬ schrank, mit zumindest einem langgestreckten transparenten Körper (12, 14),1. Lighting device for a cooling device, in particular a refrigerator, with at least one elongate transparent body (12, 14), 5 zumindest einer LED (16, 18), die an oder nahe einer Stirnfläche (74, 76) des5 at least one LED (16, 18) which at or near an end face (74, 76) of the Körpers angeordnet ist, um von der LED emittiertes Licht in den Körper einzu- koppeln, wobei eine sich in Längsrichtung des Körpers erstreckende erste Teil¬ fläche (70) der Oberfläche des Körpers gestaltet ist, um in den Körper eingekoppeltes Licht so zu streuen und/oder zu brechen und/oder zu reflektie- lo ren, dass es in Richtung auf eine der ersten Teilfläche gegenüberliegende zweite Teilfläche (72) des Körpers gelenkt wird und aus dem Körper austritt, dadurch gekennzeichnet, dass die LED (16, 18) auf ihrer vom Körper (12, 14) abgekehrten Seite in gut wärmeleitendem Kontakt mit einem Leitblech (20, 22) steht, das sich die erste Teilfläche (70) zumindest teilweise überdeckend i5 entlang dieser erstreckt.Body is arranged to couple light emitted by the LED into the body, whereby a first partial surface (70) of the surface of the body extending in the longitudinal direction of the body is designed so as to scatter light coupled into the body and / / or to break and / or reflect that it is directed towards and exiting the body towards a second face (72) of the body opposite the first face, characterized in that the LED (16, 18) is on its side from the body (12, 14) facing away from the side in good heat-conducting contact with a baffle (20, 22) which extends at least partially overlapping the first part surface (70) along this. 2. Beleuchtungsvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Körper (12, 14) zylinderförmig ist und die erste Teilfläche (70) geometrisch entsprechend einem Schnitt durch den Zylinder schräg zu dessen Längsachse2. Lighting device according to claim 1, characterized in that the body (12, 14) is cylindrical and the first partial surface (70) geometrically corresponding to a section through the cylinder obliquely to its longitudinal axis 2o definiert ist.2o is defined. 3. Beleuchtungsvorrichtung nach einem der Ansprüche 1 oder 2, dadurch ge¬ kennzeichnet, dass auf der ersten Teilfläche (70) Farbstreifen (78), insbeson¬ dere in weißer Farbe, quer zur Längsrichtung des Körpers (12, 14)3. Lighting device according to one of claims 1 or 2, characterized ge indicates that on the first part surface (70) color strips (78), insbeson dere in white color, transversely to the longitudinal direction of the body (12, 14) 25 aufgetragen sind.25 are applied. 4. Beleuchtungsvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass in einem Gehäuse (24) zwei transparente Körper (12, 14) koaxial angeordnet sind.4. Lighting device according to one of the preceding claims, characterized in that in a housing (24) has two transparent body (12, 14) are arranged coaxially. 30 30 5. Beleuchtungsvorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass LEDs auf der gerneinsamen Achse beider Körper angeordnet sind.5. Lighting device according to claim 4, characterized in that LEDs are arranged on the common axis of both bodies. 6. Beleuchtungsvorrichtung nach Anspruch 5, dadurch gekennzeichnet dass 5 LEDs an den einander zugekehrten Enden der beiden Körper (12, 14) ange¬ ordnet sind.6. Lighting device according to claim 5, characterized in that 5 LEDs at the mutually facing ends of the two bodies (12, 14) are arranged ange¬. 7. Beleuchtungsvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Leitblech (20, 22) strahlungsreflektierend ist.7. Lighting device according to one of the preceding claims, characterized in that the guide plate (20, 22) is radiation-reflecting. 1010 8. Transparenter Körper (12, 14) für eine Beleuchtungsvorrichtung, wobei der Körper eine sich in Längsrichtung erstreckende erste Teilfläche (70) aufweist, um in den Körper eingekoppeltes Licht so zu streuen und/oder zu brechen und/oder zu reflektieren, dass es in Richtung auf eine der ersten Teilfläche i5 gegenüberliegenden zweiten Teilfläche (72) des Körpers gelenkt wird und aus dem Körper austritt, dadurch gekennzeichnet, dass der Körper (12, 14) zylin¬ derförmig ist und die erste Teilfläche (70) geometrisch entsprechend einem Schnitt durch den Zylinder schräg zu dessen Längsachse definiert ist. A transparent body (12, 14) for a lighting device, the body having a longitudinally extending first face (70) for scattering and / or breaking and / or reflecting light coupled into the body is directed in the direction of a second partial surface (72) of the body opposite the first partial surface 15 and exits the body, characterized in that the body (12, 14) is cylindrical and the first partial surface (70) is geometrically corresponding to a section is defined by the cylinder obliquely to its longitudinal axis.
PCT/EP2005/008514 2004-08-11 2005-08-05 Lighting device for a refrigerating device WO2006018160A2 (en)

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