WO2010082180A2 - Lampe - Google Patents

Lampe Download PDF

Info

Publication number
WO2010082180A2
WO2010082180A2 PCT/IB2010/050204 IB2010050204W WO2010082180A2 WO 2010082180 A2 WO2010082180 A2 WO 2010082180A2 IB 2010050204 W IB2010050204 W IB 2010050204W WO 2010082180 A2 WO2010082180 A2 WO 2010082180A2
Authority
WO
WIPO (PCT)
Prior art keywords
lamp
fan
heat sink
pcb
light source
Prior art date
Application number
PCT/IB2010/050204
Other languages
English (en)
Other versions
WO2010082180A3 (fr
Inventor
Otto Horlacher
Original Assignee
Otto Horlacher
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 Otto Horlacher filed Critical Otto Horlacher
Publication of WO2010082180A2 publication Critical patent/WO2010082180A2/fr
Publication of WO2010082180A3 publication Critical patent/WO2010082180A3/fr

Links

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
    • F21V29/70—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
    • F21V29/50—Cooling arrangements
    • F21V29/60—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air
    • F21V29/67—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by the arrangement of fans
    • 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
    • F21V29/83—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks the elements having apertures, ducts or channels, e.g. heat radiation holes
    • 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]
    • 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 lamp and, in particular, to an LED lamp
  • Lighting is an essential part of everyday life. The generation of light is accompanied, to greater or lesser degrees, by heat which is usually unwanted and can be detrimental to lighting installations. Brighter light is invariably accompanied by greater heat. This is a particular problem with LED lamps which are being used increasingly in various applications.
  • Heat sinks of various descriptions are usually used to deal with the heat.
  • the problem is significant where high powered LEDs are used in a lamp which is a retrofit for an MR16 light fitting.
  • the existing fittings are often not suited to deal with the heat that is emitted by LEDs with the desired light output.
  • the size and shape of a heat sink is limited to the space afforded by the fitting.
  • a lamp which includes a light source with an electrical fan to direct heated air away from the lamp.
  • the invention further provides for the fan to be connected into an electrical supply path on the lamp, for the light source.
  • a further feature of the invention provides for the light source to be an array of LEDs mounted on a printed circuit board (PCB) with a heat sink on the other side of the PCB and the fan secured adjacent the heat sink to the side opposite to the light source.
  • PCB printed circuit board
  • the heat sink to have air-flow passages therethrough; for the fan to be housed inside a plurality of protrusions provided on the heat sink; and for a support for the fan to be secured to the protrusions.
  • a further feature of the invention provides for the lamp to be compatible for use with an MR16 light fitting.
  • Figure 1 shows an exploded perspective view of an LED lamp
  • Figure 2 shows a perspective view of the lamp in Figure 1.
  • a lamp (1 ) which includes an array of three LEDs.
  • the LEDs are mounted on a PCB (3) with a collimator lens assembly (4) secured over the LEDs.
  • the particular LED lamp (1 ) shown is for use as part of a retrofit installation in an MR16 light fitting.
  • a connector (5) is provided to extend inwardly, away from the LEDs.
  • the connector (5) is configured to be engaged by a lamp-holder mechanism within such a fitting.
  • the PCB (3) which is circular, includes a suitable printed electrical supply path (not shown) for each of the LEDs.
  • a corresponding, circular aluminium heat sink (6) is secured to the PCB (3). Electric cables (2) from the light fitting power supply lead to the supply path on the PCB (3).
  • a fan (7) Located above the heat sink (6) on the lamp (1 ) is a fan (7) driven by an electric motor (8).
  • the motor (8) is connected into the electrical supply of the LEDs through cable (9).
  • the heat sink (6) is provided with spaced apart protrusions (6.1 ) adjacent its edge.
  • the protrusions (6.1 ) extend to the side opposite to the PCB (3).
  • a support (6.2) for the fan (7) is provided as a disc with three spaced apart, radial extensions (6.3). The free ends of the extensions (6.3) have screw holes which correspond to screw-threaded openings in the ends of three of the heat sink protrusions (6.1 ).
  • the motor (8) is fixed to one side of the support (6.2) with the connector (5) extending to the other.
  • a screw-threaded shaft (not shown) which extends through a central aperture in the support (6.2) can conveniently be used to fasten the motor (8) to the connector (5) with the support (6.2) secured therebetween.
  • Screws are used to secure the support (6.2) to the heat sink (6) with the fan (7) located within the assembly, to the interior of the protrusions (6.1 ).
  • the protrusions (6.1 ) provide an increased surface area for heat exchange or, more specifically for transmission of the heat generated by the LEDs to the surrounding air.
  • the openings (10) between the protrusions (6.1 ) of the heat sink (6) provide air-flow passages (10). These passages (10) allow for flow of air from the periphery of the heat sink (6) inwardly towards the fan (7).
  • the lamp (1 ) is fitted using the connector (5) and connected to through appropriate wiring to the electrical supply lines of the MR16 light fitting (not shown).
  • the electricity to the motor (8) starts the fan (7).
  • Heat from the LEDs is transmitted through the PCB (3) to the heat sink (6).
  • the fan (7) draws air through the passages (10) of the heat sink (6). Heat from the sink (6) is transmitted to the flowing air.
  • the fan (7) pushes the heated air past the support (6.2), away from the lamp (1 ) and draws air from around the lamp (1 ) to continuously provide cooling while the LEDs are switched on.
  • the flow of air is indicated schematically by the arrows (12).
  • the fan (7) will extend the life of the lamp. It will extend the life of the LEDs and any electronic components in close proximity to the LEDs. It will also deter against heat damage to or around the fitting.
  • the invention enables the use of more powerful LEDs, which can be invaluable where lamps in an MR16 installation are being replaced.
  • the built-in fan provides cooling which will be an advantage to a wide variety of lamps, whether or not they use LEDs as a light source. It will accordingly be appreciated by a person skilled in the art that the invention may be used in other embodiments of a lamp which vary from the specific one described here with reference to the drawings.

Abstract

L'invention concerne une lampe comprenant une source lumineuse et un ventilateur électrique pour diriger de l'air chauffé à l'écart de la lampe. Le ventilateur est branché sur un circuit d'alimentation électrique de la source lumineuse, constitué d'une matrice de LED montée sur une carte à circuit imprimé (printed circuit board, PCB). Un puits de chaleur est traversé par des passages d'écoulement d'air et est installé sur l'autre face de la PCB, le ventilateur étant fixé au voisinage du puits de chaleur. Le ventilateur est logé dans une cage qui supporte un connecteur de luminaire. La lampe est de préférence compatible avec un luminaire MR16.
PCT/IB2010/050204 2009-01-16 2010-01-16 Lampe WO2010082180A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA2009/00520 2009-01-16
ZA200900520 2009-01-16

Publications (2)

Publication Number Publication Date
WO2010082180A2 true WO2010082180A2 (fr) 2010-07-22
WO2010082180A3 WO2010082180A3 (fr) 2010-09-10

Family

ID=42340164

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2010/050204 WO2010082180A2 (fr) 2009-01-16 2010-01-16 Lampe

Country Status (1)

Country Link
WO (1) WO2010082180A2 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050174780A1 (en) * 2004-02-06 2005-08-11 Daejin Dmp Co., Ltd. LED light
WO2008086665A1 (fr) * 2007-01-06 2008-07-24 Ningbo Elegance Electrical Appliances Co., Ltd. Lampe avec diode del
US20090009996A1 (en) * 2007-05-30 2009-01-08 Alessandro Scordino Lighting Device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050174780A1 (en) * 2004-02-06 2005-08-11 Daejin Dmp Co., Ltd. LED light
WO2008086665A1 (fr) * 2007-01-06 2008-07-24 Ningbo Elegance Electrical Appliances Co., Ltd. Lampe avec diode del
US20090009996A1 (en) * 2007-05-30 2009-01-08 Alessandro Scordino Lighting Device

Also Published As

Publication number Publication date
WO2010082180A3 (fr) 2010-09-10

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