EP2339232A1 - Lampe für Scheinwerfer und Scheinwerfer mit einer solchen Lampe - Google Patents

Lampe für Scheinwerfer und Scheinwerfer mit einer solchen Lampe Download PDF

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Publication number
EP2339232A1
EP2339232A1 EP10354094A EP10354094A EP2339232A1 EP 2339232 A1 EP2339232 A1 EP 2339232A1 EP 10354094 A EP10354094 A EP 10354094A EP 10354094 A EP10354094 A EP 10354094A EP 2339232 A1 EP2339232 A1 EP 2339232A1
Authority
EP
European Patent Office
Prior art keywords
lamp
conductive element
thermally conductive
rear body
diodes
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Withdrawn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
EP10354094A
Other languages
English (en)
French (fr)
Inventor
Christian Guillet
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.)
Sieled
Original Assignee
Sieled
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 Sieled filed Critical Sieled
Publication of EP2339232A1 publication Critical patent/EP2339232A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F21V31/00—Gas-tight or water-tight arrangements
    • F21V31/005—Sealing arrangements therefor
    • 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
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • 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
    • 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
    • F21W2131/401—Lighting for industrial, commercial, recreational or military use for swimming pools
    • 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 invention relates to a projector lamp, comprising a concave-shaped rear body closed by a front optics to form a closed volume enclosing an electronic card carrying and supplying light-emitting diodes turned on the side of the front optics.
  • the invention also relates to a projector.
  • Such lamps are mounted in projectors, for example for pool or the like, coming to fit into a wall or the bottom.
  • the particular assembly for swimming pool uses a hollow niche which fits into a hole in the wall or the bottom of the pool, then fastening means fix the lamp in the recess, keeping it supported by its rear side against a optical support housed in the niche.
  • Sealing means can be provided between the rear body of the lamp and the optical medium in case of liquid medium or outside air.
  • a first known technique is to use a lamp in which a heat sink is disposed between the electronic board and the bottom of the rear body. But the hermeticity of the closed volume, for example conferred by the sealing means in the presence of such means, makes it impossible to renew the air, eliminating the possibility of dissipation by convection and rendering the heat dissipation very mediocre.
  • the second known technique is to design a lamp provided with a rear body made of thermally conductive material.
  • the transmission of calories from the diodes to the rear body is practiced via the electronic card itself whose thermal conduction characteristics are very poor, further limiting the overall efficiency of the heat dissipation.
  • This technique is described in the document US2006 / 0002104 which discloses a lamp intended to be immersed.
  • a printed circuit comprising diodes is fixed on a plate provided with materials for cooling said printed circuit.
  • the invention aims to provide a projector lamp improving the heat dissipation.
  • this object is achieved by the appended claims and more particularly by the fact that a thermally conductive element provided with passage holes traversed by the diodes is interposed between the electronic card and the front optics, said element being extended. on its periphery to the outside of said closed volume, and sealing means are provided between the rear body and the front optics to seal the volume closed, the element being arranged to extend beyond the sealing means.
  • the thermally conductive element effectively captures the heat calories directly from the diodes near the through holes, then transmits them efficiently by thermal conduction to its periphery outside the closed volume.
  • the passage holes have dimensions just greater than the diodes, further improving the transmission of heat calories from the diodes to the thermally conductive element.
  • the projector according to the second aspect of the invention is remarkable in that it comprises a lamp according to the first aspect of the invention.
  • the figures 1 and 2 represent an example of a projector 10 according to the invention, comprising an example of lamp 11 according to another aspect of the invention.
  • the lamp 11 comprises a rear body 12 of concave shape, having a closed bottom 13 and opening outwards through an opening 14.
  • the rear body 12 is closed by a transparent front optics 15 or translucent.
  • the rear body 12 adopts a saucer shape, and the opening 14 is for example circular.
  • the rear body 12 may comprise an annular flange 16 protruding outwardly from the concavity delimited by the rear body 12, for the support of the front optics 15.
  • the rear body 12 and the front optics 15 jointly delimit a closed volume 22.
  • the lamp 11 is mounted in the projector 10 being embedded in a wall 17 (a wall or the bottom) for example of a pool or the like.
  • the mounting of the projector 10 uses a hollow niche 18 which fits into a hole in the wall 17, then fastening means fix the lamp 11 in the recess 18, keeping it supported by its rear side against a support optical 19 housed in the recess 18.
  • Sealing means 20 are provided between the rear body 12 of the lamp 11 and the optical medium 19.
  • the sealing means are for example formed by an annular seal of circular section.
  • the attachment means are for example constituted by a set of fastening elements 21 distributed around the periphery of the lamp 11 and arranged to generate, after their locking, a bearing force directed towards the bottom of the recess 18 on the front face of the front optics 15.
  • sealing means may optionally be provided between the rear body 12 and the front optics 15, for example along the annular flange 16. In this case, the closed volume 22 inside the lamp 11 is sealed.
  • the closed volume 22, possibly sealed, is intended to enclose an electronic card 23 carrying and electrically supplying a set of light-emitting diodes 24 turned on the side of the front optics 15.
  • the power supply of the lamp 11 is for example made by a power cable 25 passing through the niche 18 at a first sealed passage 26 to come inside the optical medium 19 through a second sealed passage 27.
  • the cable 25 is electrically connected to a connection terminal 28 of the lamp on the closed bottom 13.
  • the cable 25 is dedicated to the power supply of the electronic card 23 and, finally, diodes 24.
  • a thermally conductive element 29 provided with passage holes traversed by the diodes 24 is interposed between the electronic card 23 and the front optic 15.
  • the thermally conductive element 29 is designed to extend over all or part of its periphery beyond sealing means possibly provided between the front optics 15 and the rear body 12. Thus, the element 29 extends over at least a part of its periphery until it comes to the outside of the closed volume 22.
  • the thermally conductive element 29 may be one-piece.
  • the sealing means possibly provided between the front optics 15 and the rear body 12 may be in two parts attached to the opposite sides of the element 29. to enclose it: a first part constituted by a first seal 30 is interposed between the rear body 12 and the element 29 while a second part constituted by a second seal 31 is interposed between the element 29 and the front optic 15.
  • the first seal 30 is in direct contact with, on the one hand, the rear body 12, and on the other hand with the thermally conductive element 29.
  • the second seal 31 is preferably on the one hand in direct contact with the optical 15 and secondly with the thermally conductive element 29. This allows for a sealed device adapted to be disposed of immersed in a liquid. The device is then compact while allowing the diodes to be cooled by means of the thermally conductive element 29 which can then be in contact with the surrounding liquid of the device.
  • thermally conductive element 29 is attached against the electronic card 23, with optional interposition of an electrically insulating and thermally conductive film.
  • first and second seals 30, 31 it is advantageous for the first and second seals 30, 31 not to grip the film.
  • such a film remains optional in the case of a suitable design of the electronic card 23.
  • the passage holes of the diodes have dimensions just greater than the diodes.
  • the clearance between the diodes and the holes can be chosen so as to leave free the electrical contacts between the diodes 24 and the electronic card 23 but while remaining low enough for a correct transfer of the calories of the diodes to the element 29.
  • the principle of evacuation of heat calories outside the lamp 11 is applicable in the case where the projector would be used in the ambient air and not in a liquid medium.
  • the heat exchange of the lamp 11 with the ambient air is then optimized by the design of the lamp 11.
  • the lamp can be used outdoors or indoors. In the case of use in an indoor air environment, the sealing means 30, 31 may be omitted.
  • the heat dissipation capacity of the lamp 11 can be modulated according to the surface and / or the volume of the portion of the thermally conductive element 29 located outside the closed volume 22.
  • element 29 carries, on at least a part of its periphery, a cooling fin 32 whose height can be adjusted according to the desired heat dissipation capacity for the lamp.
  • the fixing of the front optics 15 to the rear body 12 can be carried out by any suitable means, such as for example a plurality of screws or bolt and nut systems distributed all around the annular flange 16.
  • these securing means are designed to press the optics forward against the annular flange 16 of the rear body 16, exerting a compressive force of the first and second seals 30, 31 together.
  • the invention generally consists in providing a lamp 11 for a projector, comprising a rear body 12 of concave shape closed by an optic before 15 to form a closed volume 22 enclosing an electronic card 23 carrying and supplying electroluminescent diodes 24 turned on the side of the front optics 15, in which a thermally conductive element 29 provided with through holes through which the diodes 24 are interposed between the electronic card 23 and the front optical 15, said element 29 extending on its periphery to the outside of said closed volume 22.
  • the element 29 therefore comprises an inner portion located in the closed volume 22 having the function of capturing the thermal calories emitted by the diodes 24 closer to these and transmit by conduction the calories captured to an outer portion of the element 29 located outside the closed volume 22 and whose function is to ensure the evacuation of calories for the heat dissipation of the lamp 11.
  • the outer portion of the element 29 is in direct contact with the liquid in which it is immersed to best dissipate the temperature generated by the diodes.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
EP10354094A 2009-12-24 2010-12-21 Lampe für Scheinwerfer und Scheinwerfer mit einer solchen Lampe Withdrawn EP2339232A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0906353A FR2954809B1 (fr) 2009-12-24 2009-12-24 Lampe pour projecteur et projecteur muni d'une telle lampe

Publications (1)

Publication Number Publication Date
EP2339232A1 true EP2339232A1 (de) 2011-06-29

Family

ID=42335153

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10354094A Withdrawn EP2339232A1 (de) 2009-12-24 2010-12-21 Lampe für Scheinwerfer und Scheinwerfer mit einer solchen Lampe

Country Status (2)

Country Link
EP (1) EP2339232A1 (de)
FR (1) FR2954809B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2968333A1 (fr) * 2011-11-17 2012-06-08 Royalux Dispositif d'eclairage pour piscine.
CN104266121A (zh) * 2014-10-16 2015-01-07 中山火炬开发区伟棋五金厂 筒形双环勒条散热器天花灯
EP2800932A4 (de) * 2011-12-30 2015-10-07 Wet Entpr Inc Dba Wet Design Unterwasser-led-leuchten
WO2015189812A1 (en) * 2014-06-12 2015-12-17 DU PLOOY, Cheryl An underwater light fitting

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4450511A (en) * 1982-04-13 1984-05-22 Pem Fountain Co. Submersible high intensity lamp
DE19528459A1 (de) * 1995-08-03 1997-02-13 Garufo Gmbh Leuchtaggregat
US20060002104A1 (en) 2004-06-30 2006-01-05 Willis Vance E Underwater LED light
WO2008123670A1 (en) * 2007-04-10 2008-10-16 Fawoo Technology Co., Ltd. Heat dissipating led lighting apparatus without fan
US20090237932A1 (en) * 2008-03-18 2009-09-24 Pan-Jit International Inc. Led lighting device having heat convection and heat conduction effects and heat dissipating assembly therefor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4450511A (en) * 1982-04-13 1984-05-22 Pem Fountain Co. Submersible high intensity lamp
DE19528459A1 (de) * 1995-08-03 1997-02-13 Garufo Gmbh Leuchtaggregat
US20060002104A1 (en) 2004-06-30 2006-01-05 Willis Vance E Underwater LED light
WO2008123670A1 (en) * 2007-04-10 2008-10-16 Fawoo Technology Co., Ltd. Heat dissipating led lighting apparatus without fan
US20090237932A1 (en) * 2008-03-18 2009-09-24 Pan-Jit International Inc. Led lighting device having heat convection and heat conduction effects and heat dissipating assembly therefor

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2968333A1 (fr) * 2011-11-17 2012-06-08 Royalux Dispositif d'eclairage pour piscine.
EP2594245A1 (de) 2011-11-17 2013-05-22 PPLV Trading Sia (SA) Beleuchtungsvorrichtung für Schwimmbad
EP2800932A4 (de) * 2011-12-30 2015-10-07 Wet Entpr Inc Dba Wet Design Unterwasser-led-leuchten
WO2015189812A1 (en) * 2014-06-12 2015-12-17 DU PLOOY, Cheryl An underwater light fitting
US10113738B2 (en) 2014-06-12 2018-10-30 Integrated Pool Products (Pty) Ltd. Underwater light fitting
AU2015273030B2 (en) * 2014-06-12 2020-06-18 Integrated Pool Products (Pty) Ltd An underwater light fitting
CN104266121A (zh) * 2014-10-16 2015-01-07 中山火炬开发区伟棋五金厂 筒形双环勒条散热器天花灯

Also Published As

Publication number Publication date
FR2954809B1 (fr) 2012-11-02
FR2954809A1 (fr) 2011-07-01

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