EP2957817A1 - Appareil d'éclairage led et son procédé de fabrication - Google Patents

Appareil d'éclairage led et son procédé de fabrication Download PDF

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Publication number
EP2957817A1
EP2957817A1 EP15000913.2A EP15000913A EP2957817A1 EP 2957817 A1 EP2957817 A1 EP 2957817A1 EP 15000913 A EP15000913 A EP 15000913A EP 2957817 A1 EP2957817 A1 EP 2957817A1
Authority
EP
European Patent Office
Prior art keywords
recess
casing
lighting fixture
led lighting
cover plate
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Withdrawn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
EP15000913.2A
Other languages
German (de)
English (en)
Inventor
Albert Thaeke Russchen
Raymond Gerard Maria Wigger
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.)
Rubitech Luctron BV
Original Assignee
Rubitech Luctron BV
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 Rubitech Luctron BV filed Critical Rubitech Luctron BV
Publication of EP2957817A1 publication Critical patent/EP2957817A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • F21V29/507—Cooling arrangements characterised by the adaptation for cooling of specific components of means for protecting lighting devices from damage, e.g. housings
    • 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
    • F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
    • 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
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
    • F21V17/101—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening permanently, e.g. welding, gluing or riveting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
    • F21V23/007—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array enclosed in a casing
    • F21V23/009—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array enclosed in a casing the casing being inside the housing of the lighting device
    • 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
    • F21V29/71—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks using a combination of separate elements interconnected by heat-conducting means, e.g. with heat pipes or thermally conductive bars between separate heat-sink elements
    • F21V29/713—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks using a combination of separate elements interconnected by heat-conducting means, e.g. with heat pipes or thermally conductive bars between separate heat-sink elements in direct thermal and mechanical contact of each other to form a single system
    • 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
    • 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
    • F21V29/77—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical diverging planar fins or blades, e.g. with fan-like or star-like cross-section
    • 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
    • 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 concerns a method for the manufacture of an LED lighting fixture with improved heat transfer, and the LED lighting fixture manufactured therewith comprising a metal casing with cooling fins, with a top and a bottom part, the bottom part comprising an at least partially flat surface with a recess, a control unit fitted in the recess for controlling the LED lights, a metal cover plate that fits in the recess and substantially closes it, and a printed circuit board carrying LEDs.
  • LED Light Emitting Diode
  • the use of LEDs is particularly economical because of their long lifespan. Groups of LEDs combined in lighting fixtures can provide the high luminescence needed for such spaces.
  • supplementary measures and/or components are needed, such as locating the control unit outside of the housing and/or the use of a ventilator, as described in US7144140 , where the heat is actively transferred by means of a fan. Nevertheless the heat transfer remains a restricting factor for the number of LEDs that can be used in such lighting fixtures.
  • the task underlying the present invention is therefore to provide a method for the manufacture of an LED lighting fixture, and the LED lighting fixture produced therewith, with an improved heat transfer without the need for additional measures and/or components.
  • An additional advantage is that the lighting fixture can be made more compact.
  • the solution is provided by a method with the characteristics of claim 1, and an LED lighting fixture according to claim 10.
  • a purpose of the invention is to provide a method for the manufacture of an LED lighting fixture with improved heat transfer, comprising:
  • Friction Stir Welding is a welding method developed by The Welding Institute, whereby, under pressure and friction heat the materials to be welded together are temporarily plasticized, mixed and fused together. The temperature, however, remains sufficiently low that the materials do not melt.
  • FSW Friction Stir Welding
  • they are metallurgically joined such that they, in effect, fuse in each other.
  • the thermal resistance of the transition remains relatively law. Consequently, the cover plate and the casing form a substantially single thermal unit. In this way, the heat generated by the LEDs can be transferred very effectively from the cover plate to the casing and cooling fins. This can be done without the need for taking any further measures or using extra components.
  • the solution is simple, reliable and cost-effective.
  • a favourable embodiment of the method according to the present invention is characterised in that the metal casing comprises at least one of the metals aluminium and magnesium. This makes the lighting fixture lighter without adversely affecting the heat transfer.
  • Another preferred embodiment of the method according to the present invention is characterised in that the recess is located centrally in the at least partially flat part of the casing. As a result, the centre of gravity is almost in the middle.
  • the casing is preferably bell-shaped at the top part.
  • An especially preferred embodiment of the method according to the present invention is characterised in that the recess is at least partially stepped.
  • the cover plate can be easily positioned in the stepped recess during FSW without the need for taking any further measures.
  • the casing and the cooling fins are die cast as a single piece, which facilitates manufacture and allows for mass production.
  • a further embodiment comprises a metal cover plate of one of aluminium or magnesium.
  • the so-called Power LEDs presently commercially available offer a relatively high luminescence compared to conventional LEDs.
  • the LEDs are Power LEDs. However this makes heat management very important as these Power LEDs generate relatively much more heat during operation.
  • the casing, the recess and the cover plate can have several geometrical shapes, a round shape is preferred. In practice, round lighting fixtures will prove to be the most prevalent and desired shape.
  • a further purpose of the present invention is to provide an LED lighting fixture with improved heat transfer, comprising a casing with cooling fins, with a top and a bottom part, whereby the bottom part comprises an at least partially flat part, which part has a recess, a control unit that fits into the recess for controlling the LEDs, a metal cover plate that fits in the recess and substantially closes it, and a printed circuit board carrying LEDs.
  • the LED lighting fixture is characterised in that the control unit is located in the recess, the cover plate is joined to the at least partially flat part of the top part of the casing by means of Friction Stir Welding, such that they form a substantially single thermal unit and the printed circuit board is mounted to the bottom part of the casing.
  • the cover plate By joining the cover plate to the casing, using FSW, they are metallurgical joined such that they, in effect, fuse in each other thus keeping the thermal resistance of the transition relatively low. As a result, casing and cover plate form a substantially single thermal unit. This way, the heat generated by the LEDs can be transferred very efficiently from the cover plate to the casing and the cooling fins. As a result, the LED lighting fixture can be simple, reliable and cheap to manufacture.
  • a favourable embodiment of the LED lighting fixture according to the invention is characterised in that the metal casing comprises at least one of the metals aluminium and magnesium. This makes the lighting fixture lighter without adversely affecting the heat transfer.
  • Another preferred embodiment of the LED lighting fixture according to the present invention is characterised in that the recess is located centrally in the at least partially flat part of the casing. As a result, the centre of gravity is almost in the middle.
  • the casing is preferably bell-shaped at the top part.
  • An especially preferred embodiment of the LED lighting fixture according to the present invention is characterised in that the recess is at least partially stepped.
  • the cover plate can be easily positioned in the stepped recess during FSW without the need for any further action.
  • the casing and the cooling fins are die cast as a single unit, which facilitates manufacture and allows for mass production.
  • a further preferable embodiment of the LED lighting fixture according to the present invention is characterised in that the cover plate comprises at least one of the metals aluminium or magnesium.
  • the LEDs are Power LEDs.
  • the casing, the recess and the cover plate have a round shape which in practice will prove to be the most prevalent and desired shape.
  • FIG 1 shows a schematic top view of a somewhat simplified embodiment of the LED lighting fixture (1).
  • the lighting fixture comprises a casing (2) with a top and bottom part, whereby the top part (3) is bell shaped.
  • the casing (2) is provided with cooling fins (4) of which only a limited number is depicted in the drawings, for simplicity's sake.
  • the casing (2) has a threaded hole (11) for suspending the lighting fixture (1) and a hole for the electric wiring.
  • the LED lighting fixture (1) according to the embodiment of figure 1 is represented as a side view in figure 2 , whereby the bottom part (5) of the casing is flat.
  • FIG. 3 shows a schematic cross section A-A of the side view of the LED lighting fixture (1), where the cover plate (8), provided with a hole for the wiring, is still outside of the recess (6).
  • the control unit for controlling the LEDs which is not shown in this figure, fits into the recess (6).
  • the Recess (6) at the bottom part (5) of the casing (2) is stepped. This stepped recess (6) is in this example provided with a single tread (7) onto which the cover plate (8) will be positioned.
  • the recess (6) can be partially stepped, so that a number of treads can be made in the recess (6) in order e.g. to mount the control unit.
  • the cover plate (8) is positioned in the recess (6) in such a way that the cover plate (8) forms a continuous flat surface with the bottom part (5) of the casing (6).
  • the cover plate (8) has been joined to the casing (2) by means of FSW so they form a substantially single thermal unit. This is shown in figure 5 . where a detail cross section of the FSW joined part (9) is represented (The encircled area in figure 4 ).
  • Figure 6 shows a schematic representation of the top view of the bottom part (5) of the casing (2) after FSW welding of the cover plate (8). After FSW welding, the bottom part (5) of the casing (2) can be further processed, e.g. to remove the welding traces (10).
  • the printed circuit board carrying the LEDs (not shown) which often has almost the same shape as the bottom part (5) of the casing (2) is mounted.
  • the LEDs are distributed over the entire surface of the printed circuit board.
  • a, generally transparent, cover can be fitted to protect the LEDs against the weather conditions and to better scatter the light of the LEDs.
EP15000913.2A 2014-03-28 2015-03-27 Appareil d'éclairage led et son procédé de fabrication Withdrawn EP2957817A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL1040746A NL1040746B1 (nl) 2014-03-28 2014-03-28 LED verlichtingsarmatuur en de werkwijze voor het vervaardigen daarvan.

Publications (1)

Publication Number Publication Date
EP2957817A1 true EP2957817A1 (fr) 2015-12-23

Family

ID=52828958

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15000913.2A Withdrawn EP2957817A1 (fr) 2014-03-28 2015-03-27 Appareil d'éclairage led et son procédé de fabrication

Country Status (2)

Country Link
EP (1) EP2957817A1 (fr)
NL (1) NL1040746B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017113067A1 (fr) * 2015-12-28 2017-07-06 深圳市聚作照明股份有限公司 Plafonnier à del

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7144140B2 (en) 2005-02-25 2006-12-05 Tsung-Ting Sun Heat dissipating apparatus for lighting utility
US7255460B2 (en) 2005-03-23 2007-08-14 Nuriplan Co., Ltd. LED illumination lamp
US7905383B1 (en) * 2009-12-22 2011-03-15 Chung Shan Institute Of Science And Technology, Armaments Bureau, M.N.D. Manufacturing method of metal matrix composite using friction stir welding
DE202011005015U1 (de) * 2011-01-28 2011-07-26 Fin-Core Corporation Leuchtdiodenlampe
EP2423573A2 (fr) * 2010-08-24 2012-02-29 Toshiba Lighting & Technology Corporation Unité de lampe et appareil d'éclairage
US20120098429A1 (en) * 2010-10-22 2012-04-26 Ching-Long Liang Led lamp with heat dissipation
US20120217861A1 (en) * 2011-02-24 2012-08-30 Soni Vimal J LED Heat Sink Assembly
DE202012104495U1 (de) * 2012-08-09 2012-11-27 Sheng-Yi CHUANG LED-Birne mit der Möglichkeit zur Erhöhung der Wärmeabführleistung
US8414178B2 (en) 2009-08-12 2013-04-09 Journée Lighting, Inc. LED light module for use in a lighting assembly
WO2013057433A1 (fr) * 2011-10-20 2013-04-25 Epled France Dispositif d'éclairage à diodes électroluminescentes
US20130294093A1 (en) * 2012-05-03 2013-11-07 Teajeong AHN Lighting apparatus

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7144140B2 (en) 2005-02-25 2006-12-05 Tsung-Ting Sun Heat dissipating apparatus for lighting utility
US7255460B2 (en) 2005-03-23 2007-08-14 Nuriplan Co., Ltd. LED illumination lamp
US8414178B2 (en) 2009-08-12 2013-04-09 Journée Lighting, Inc. LED light module for use in a lighting assembly
US7905383B1 (en) * 2009-12-22 2011-03-15 Chung Shan Institute Of Science And Technology, Armaments Bureau, M.N.D. Manufacturing method of metal matrix composite using friction stir welding
EP2423573A2 (fr) * 2010-08-24 2012-02-29 Toshiba Lighting & Technology Corporation Unité de lampe et appareil d'éclairage
US20120098429A1 (en) * 2010-10-22 2012-04-26 Ching-Long Liang Led lamp with heat dissipation
DE202011005015U1 (de) * 2011-01-28 2011-07-26 Fin-Core Corporation Leuchtdiodenlampe
US20120217861A1 (en) * 2011-02-24 2012-08-30 Soni Vimal J LED Heat Sink Assembly
WO2013057433A1 (fr) * 2011-10-20 2013-04-25 Epled France Dispositif d'éclairage à diodes électroluminescentes
US20130294093A1 (en) * 2012-05-03 2013-11-07 Teajeong AHN Lighting apparatus
DE202012104495U1 (de) * 2012-08-09 2012-11-27 Sheng-Yi CHUANG LED-Birne mit der Möglichkeit zur Erhöhung der Wärmeabführleistung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017113067A1 (fr) * 2015-12-28 2017-07-06 深圳市聚作照明股份有限公司 Plafonnier à del

Also Published As

Publication number Publication date
NL1040746A (nl) 2016-01-08
NL1040746B1 (nl) 2016-01-18

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