EP2236912A2 - Luminaire - Google Patents

Luminaire Download PDF

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Publication number
EP2236912A2
EP2236912A2 EP10002747A EP10002747A EP2236912A2 EP 2236912 A2 EP2236912 A2 EP 2236912A2 EP 10002747 A EP10002747 A EP 10002747A EP 10002747 A EP10002747 A EP 10002747A EP 2236912 A2 EP2236912 A2 EP 2236912A2
Authority
EP
European Patent Office
Prior art keywords
luminaire
reflector
base body
light
led
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.)
Withdrawn
Application number
EP10002747A
Other languages
German (de)
English (en)
Other versions
EP2236912A3 (fr
Inventor
Bernhard Schütte
Volker Neu
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.)
BaeRo GmbH and Co KG
Original Assignee
BaeRo GmbH and Co KG
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 BaeRo GmbH and Co KG filed Critical BaeRo GmbH and Co KG
Publication of EP2236912A2 publication Critical patent/EP2236912A2/fr
Publication of EP2236912A3 publication Critical patent/EP2236912A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/02—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
    • 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
    • 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
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/76—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
    • F21V29/763—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section the planes containing the fins or blades having the direction of the light emitting axis
    • 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
    • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
    • 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
    • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
    • F21V29/89—Metals
    • 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
    • F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • F21V21/02—Wall, ceiling, or floor bases; Fixing pendants or arms to the bases
    • F21V21/04—Recessed bases
    • 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]

Definitions

  • the present invention relates to a luminaire, in particular a recessed or pendant luminaire, with a base body and an LED light-emitting module comprising at least one LED and a control circuit for the LED, wherein the LED light-emitting module is held on the base body and in particular inserted therein ,
  • Such lights are known in the art and are used in particular in lighting systems in which several recessed lights are connected centrally to a supply voltage.
  • an electronic circuit is provided as a control circuit, which drives the LED with an operating voltage.
  • the control circuits can be designed in different ways and z. B. also cause a current control by the LED. Since the luminous power of an LED depends primarily on the current flowing through it, a constant luminous effect can be achieved thereby.
  • Object of the present invention is therefore to provide a recessed luminaire of the type mentioned, which allows a constant luminous power and a long life of the LED.
  • the main body is designed as a heat sink, which consists of a material having a high thermal conductivity, and the LED light emitting module is thermally coupled to the base body.
  • the basic idea of the present invention is thus to dissipate the heat accumulating in the LED lighting module from the lighting module into the main body, thereby keeping the temperature in the LED lighting module constant or decreasing.
  • the LED lighting module is coupled to the base body via a heat spreader provided therebetween, in particular a graphite foil.
  • the heat spreader ensures a good transfer of heat from the LED light module to the base body and on the other hand for a uniform distribution of the heat to be delivered by the LED light module to the base body. This allows the main body to absorb the heat from the LED light module quickly and evenly.
  • the main body may have in its outer side cooling fins.
  • the increased surface area improves heat dissipation to the environment.
  • the lamp may include a reflector made of a material having a high thermal conductivity and thermally coupled to the body.
  • the surface of the reflector can be used for heat radiation.
  • the heat is at least partially introduced into the reflector from the LED lighting module via the base body and discharged from there to the surroundings.
  • the heat output of the reflector can be improved if it is provided on its outside with a black coating.
  • the reflector may be surrounded on its outer side at least partially by a housing made of a material having a high thermal conductivity, which thermally with the main body is coupled.
  • the housing can contribute to the heat radiation.
  • the lamp may comprise a mounting ring with which the base body in an opening of a mounting surface, in particular a ceiling or wall is attachable.
  • the mounting ring can be used to fix the body to the screen of a pendant lamp.
  • the mounting ring can also be formed integrally with the screen.
  • On the mounting ring of the base body is mounted so that between the mounting ring and the base body, an air gap is formed through which air can circulate to cool the body. Such an air flow is created automatically by the chimney effect, which is generated by the heating of the body.
  • the base body may be thermally coupled to the mounting ring.
  • This can be z.
  • a holder of the body on a heat-conducting axis which is thermally coupled both to the base body as well as with the mounting ring.
  • the mounting ring can be used to radiate heat.
  • an active cooling can be provided, which is coupled to the base body and / or the reflector and / or the housing.
  • the active cooling can be, for example, a water cooling or cooling by a ventilation device which performs an improvement of the air exchange on the base body and / or the reflector and / or the housing.
  • the thermally conductive material of the base body and / or the reflector and / or the housing is a metal, in particular aluminum.
  • Metals have a high thermal conductivity, with the use of aluminum in addition, the low weight is beneficial.
  • the LED lighting module has a conversion layer at its light exit opening, which generates a Lambert light distribution of the LED lighting module.
  • the diffuse scattering at the conversion layer produces a regular light distribution curve and produces a uniform light impression.
  • the side walls of the reflector can be designed as a pair of opposing reflector sheets and the light can be evenly distributed in the axes of the reflector plates lying opposite. In this way, a desired light distribution can be realized in a simple manner, wherein the shape of the light distribution depends on the number of reflector sheets arranged in pairs and their opening angle. Unbalanced luminous intensity distributions can be generated if the opposing reflector sheets are aligned differently, ie if their opening angle differs are. In order to achieve a heat radiation over the reflector sheets, each of the sheets should be thermally coupled to the body of the recessed luminaire.
  • two pairs of opposing reflector plates may be provided, whose axes are at right angles to each other.
  • the half-power angles of the light distribution in the two axes can differ by a factor of 1.5 to 5, in particular by a factor of 2. This corresponds to an elongated light distribution, which is defined by the orientation of the reflector sheets.
  • the transition areas between adjacent reflector sheets may be formed as open slots.
  • the reflector sheets can be made individually, and further, no special measures are required when assembling the reflector.
  • the radiation of the light through the slots is in a suitable design with closely fitting reflector sheets low, so that the overall lighting effect of the recessed light is hardly affected.
  • the side walls of the reflector may be pivotable relative to a central axis of the lamp. This allows easy adaptation to individually desired lighting conditions, without the reflector would have to be replaced.
  • the reflector sheets can be either individually adjustable or a coupling between each opposite reflector sheets or adjacent reflector sheets is possible.
  • FIG. 1 shows a recessed luminaire 1 according to a first embodiment of the present invention.
  • the recessed luminaire 1 comprises a base body 2 with a base plate 3 and provided at the edges side walls 4, which form a receptacle open to its underside.
  • the main body 2 is made of a material having a high thermal conductivity, in this case aluminum.
  • To the recessed luminaire 1 also includes an LED lighting module 5, which is inserted into the base body 2.
  • a Heatspreader 6 which is designed as a graphite foil, provided for thermal coupling.
  • the LED lighting module 5 comprises a module housing 7, the bottom of which forms a conversion layer 8 as a light exit opening.
  • a circuit board 9 is mounted on which a not visible here control circuit and three LEDs 10 are held.
  • a reflector 11 made of a material having a high thermal conductivity, in the present case aluminum, mounted and thermally coupled to the base body 2.
  • the reflector 11 is designed on its outside with a black coating, whereas the inside of the reflector 11 has a reflective surface.
  • the side walls of the reflector 11 are in the form of pairs of reflector plates 11A, 11B, of which only one pair can be seen in the sectional view.
  • the reflector sheets 11A, 11B are relative to a central axis the recessed luminaire 1 pivotally held on the base body 2.
  • a second invisible pair of opposed reflector sheets is provided with the axes of the two pairs of opposing reflector sheets 11A, 11B at right angles to each other.
  • the transition areas between the adjacent reflector sheets 11A, 11B are each formed as an open slot.
  • the recessed luminaire 1 comprises a mounting ring 12, which is designed as an angle profile and mounted on a ceiling plate 15 in a manner not shown here.
  • the base body 2 is held pivotably about an axis 13 in the mounting ring 12 and thermally coupled thereto. Between the mounting ring 12 and the base body 2, an air gap 14 is formed, which extends between the mounting ring 12 and the base body 2.
  • the ventilation device is arranged so that the recessed light 1 is in the air flow of the ventilation device.
  • the recessed light 1 is connected in a manner not shown to an electrical supply voltage.
  • the control circuit on the circuit board 9 supplies a required operating voltage for the LEDs 10, so that they emit light.
  • the radiated light passes through the conversion layer 8 of the LED lighting module 5, at which a Lambert light distribution is generated.
  • the light is focused in the reflector 11 to produce a uniform light distribution in the axes of the reflector sheets 11A, 11B.
  • the light distribution can be changed by pivoting the reflector sheets 11A, 11B.
  • the heat along the arrow W is guided by the board 9 in the housing 7 of the LED lighting module 5 and transmitted via the graphite foil 6 to the base body 2.
  • the graphite foil 6 causes not only a transfer of heat, but also their distribution over the contact surface with the base body 2, so that there is a uniform heat transfer.
  • the heat along the arrow W is also forwarded to the reflector 11.
  • the thus heated base body 2 and the reflector 11 act due to their high thermal conductivity as a heat sink. They emit by the radiation marked with the arrows A, the heat supplied to the environment, the reflector 11 radiates heat both to itslusterwie to its inside. Due to the dark coating on the outside, the heat radiation is higher there than on the inside.
  • the air flow causes an exchange of the already heated by the base body 2 and reflector 11 ambient air, whereby the heat output from the base body 2 and the reflector 11 is improved.
  • an air flow is generated by the ventilation device, which increases the supply of ambient air and increases the cooling effect.
  • FIG. 3 a recessed luminaire 1 according to a second embodiment of the present invention is shown. Since the recessed luminaire 1 differs only slightly from that of the first embodiment, identical components are provided with the same reference numerals.
  • the recessed luminaire 1 comprises a base body 2 which is similar to the first embodiment and has cooling fins 16 on its outside.
  • a base body 2 which is similar to the first embodiment and has cooling fins 16 on its outside.
  • an identical with the first embodiment LED lighting module 5 is used.
  • a graphite foil 6 is provided as a heat spreader in a gap between the LED light module 5 and the base body 2.
  • the base body 2 is exactly as in the first embodiment in a mounting ring 12 which is fixed to a ceiling plate 15, held. Again, an air gap 14 is formed between the base body 2 and the mounting ring 12.
  • a reflector 11 is provided, which is held on the LED lighting module 5.
  • the reflector 11 is not thermally coupled to the base body 2.
  • the reflector 11 is also formed of two pairs of opposing reflector plates 11A, 11B whose axes are at right angles to each other. Due to the sectional view, only a pair of reflector sheets 11A, 11B can be seen here.
  • the transition areas between the adjacent reflector sheets 11A, 11B are each designed as an open slot and the reflector sheets 11A, 11B are held firmly on the LED lighting module 5 in such a way that the half-value angles of the light distribution in the two axes differ by a factor of two.
  • the reflector 11 is surrounded on its outside completely by a housing 17 made of a material having a high thermal conductivity, in this case aluminum, wherein the housing 17 is thermally coupled to the main body 2. Also in this embodiment, a ventilation device, not shown, is provided as active cooling, in the outlet region of the recessed light 1 is positioned.
  • the light is generated, as described with reference to the first embodiment, wherein the direct arrangement of the reflector 11 on the LED lighting module 5, a better focusing of the light takes place. This leads to a particularly uniform distribution of the light in the axes of the opposing reflector plates 11A, 11B.
  • the heat generated in the LED lighting module 5 is distributed via the heat spreader 6 and emitted to the main body 2, which acts as a heat sink. From there, the heat is partially forwarded along the arrows w in the housing 17 and, as indicated by the arrows A, radiated from the base body 2 with the cooling fins 16 provided thereon and the housing 17 in each case to the outside.
  • the air gap 14 between the mounting ring 12 and the base body 2 is formed by the chimney effect of an air flow, which is indicated by the arrows L, and causes a supply of not yet heated ambient air along the outside of the housing 17 and the base body 2.
  • an air flow is generated by the ventilation device, which increases the supply of ambient air and increases the cooling effect.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP10002747A 2009-03-31 2010-03-16 Luminaire Withdrawn EP2236912A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202009004252U DE202009004252U1 (de) 2009-03-31 2009-03-31 Leuchte

Publications (2)

Publication Number Publication Date
EP2236912A2 true EP2236912A2 (fr) 2010-10-06
EP2236912A3 EP2236912A3 (fr) 2012-04-25

Family

ID=42221221

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10002747A Withdrawn EP2236912A3 (fr) 2009-03-31 2010-03-16 Luminaire

Country Status (2)

Country Link
EP (1) EP2236912A3 (fr)
DE (1) DE202009004252U1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012222814A1 (de) 2012-12-11 2014-06-12 Sgl Carbon Se Beleuchtungssystem für Flächenbauteile wie Decken oder Wände
US9989194B2 (en) 2013-05-08 2018-06-05 Philips Lighting Holding B.V. Lighting device

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202011110560U1 (de) 2010-09-30 2014-12-01 Koninklijke Philips N.V. Beleuchtungseinrichtung und Leuchte
DE202011051187U1 (de) * 2011-09-02 2012-12-07 Zumtobel Lighting Gmbh Kühlkörper für ein Downlight, sowie Downlight
DE102012013332A1 (de) * 2012-07-06 2014-01-09 Led-Linear Gmbh LED-Leuchtenreflektor und Leuchte
TWI509192B (zh) * 2013-12-19 2015-11-21 Sunonwealth Electr Mach Ind Co 燈具及其透氣套環
DE102014004894A1 (de) * 2014-03-28 2015-10-01 Occhio GmbH Leuchtkopf für ein modulares Leuchtensystem
DE202014101536U1 (de) * 2014-04-01 2015-07-06 Zumtobel Lighting Gmbh Deckeneinbauleuchte sowie Gehäuse für eine Deckeneinbauleuchte
DE202014103438U1 (de) * 2014-07-25 2015-10-27 Zumtobel Lighting Gmbh Leuchtengehäuse mit natürlicher konvektiver Kühlung
DE202014105429U1 (de) * 2014-11-12 2016-02-15 Zumtobel Lighting Gmbh Einbauleuchte

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US6871983B2 (en) * 2001-10-25 2005-03-29 Tir Systems Ltd. Solid state continuous sealed clean room light fixture
US6641284B2 (en) * 2002-02-21 2003-11-04 Whelen Engineering Company, Inc. LED light assembly
US7144135B2 (en) * 2003-11-26 2006-12-05 Philips Lumileds Lighting Company, Llc LED lamp heat sink
IES20050086A2 (en) * 2004-02-17 2005-09-21 William M Kelly A utility lamp
DE102004019137A1 (de) * 2004-04-16 2005-11-17 Trilux-Lenze Gmbh + Co Kg Leuchtenfeld
GB2413840B (en) * 2004-05-07 2006-06-14 Savage Marine Ltd Underwater lighting
US7144140B2 (en) * 2005-02-25 2006-12-05 Tsung-Ting Sun Heat dissipating apparatus for lighting utility
DE202007008232U1 (de) * 2007-06-12 2007-08-09 Richter, Tim Beleuchtungseinrichtung
DE102007054206A1 (de) * 2007-10-15 2009-04-16 Harald Hofmann LED-Lampe mit Diffusor
DE202008013667U1 (de) * 2008-10-15 2008-12-18 Li, Chia-Mao Mehrschaliger Reflektorbecher

Non-Patent Citations (1)

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Title
None

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012222814A1 (de) 2012-12-11 2014-06-12 Sgl Carbon Se Beleuchtungssystem für Flächenbauteile wie Decken oder Wände
US9989194B2 (en) 2013-05-08 2018-06-05 Philips Lighting Holding B.V. Lighting device

Also Published As

Publication number Publication date
EP2236912A3 (fr) 2012-04-25
DE202009004252U1 (de) 2010-05-27

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