WO2011107979A1 - Luminaire à diodes électroluminescentes ayant un ventilateur de refroidissement intégré - Google Patents

Luminaire à diodes électroluminescentes ayant un ventilateur de refroidissement intégré Download PDF

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Publication number
WO2011107979A1
WO2011107979A1 PCT/IL2011/000171 IL2011000171W WO2011107979A1 WO 2011107979 A1 WO2011107979 A1 WO 2011107979A1 IL 2011000171 W IL2011000171 W IL 2011000171W WO 2011107979 A1 WO2011107979 A1 WO 2011107979A1
Authority
WO
WIPO (PCT)
Prior art keywords
lamp
support element
air
housing
lamp support
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.)
Ceased
Application number
PCT/IL2011/000171
Other languages
English (en)
Inventor
Zvi Brenner
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.)
Whitecastle Investments Ltd
Original Assignee
Whitecastle Investments Ltd
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 Whitecastle Investments Ltd filed Critical Whitecastle Investments Ltd
Publication of WO2011107979A1 publication Critical patent/WO2011107979A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • 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
    • F21V29/773—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 the planes containing the fins or blades having the direction of the light emitting axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • 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
    • 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
    • F21V29/673—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by the arrangement of fans the fans being used for intake
    • 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
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/30—Elongate light sources, e.g. fluorescent tubes curved
    • F21Y2103/33—Elongate light sources, e.g. fluorescent tubes curved annular
    • 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

  • This invention relates to lamp fittings having an integral cooling fan.
  • LEDS Light-emitting diodes
  • halogen lamps are gradually replacing halogen lamps as the preferred choice for low power, high intensity spots.
  • a halogen lamp rated at 35/50W is replaced by LEDs, a lamp fitting that can accommodate several power LEDs is required in order to provide equivalent illumination.
  • a power LED gets extremely hot at its rear surface and the heat must be dissipated in order to prevent damage to the LED as well avoid the risk of fire.
  • the heat is imparted to the circuit board, which becomes very hot and must be dissipated.
  • CN 200810218685 discloses an LED lamp fitting that comprises a thermally conductive base plate in thermal contact with a heat sink, a shell and a drive circuit board component.
  • the base plate is fixedly connected with at least one LED chip and the heat sink is connected to the base plate for heat dissipation.
  • the drive circuit board component is positioned inside the shell and the heat sink is positioned between a radiating fan and the base plate.
  • Fig. 85 a thermal facility for removing heat from a LED lighting unit.
  • the thermal facility may be any facility for managing the flow of heat, such as a fan or similar mechanism for providing air flow to the lighting unit.
  • a fan or other convection facility can be under control of a processor and a temperature sensor such as a thermostat to provide cooling when necessary and to remain off when not necessary.
  • Fig. 91 shows an embodiment that employs a thermally conductive plate in combination with a micro-fan.
  • US20060232984 discloses air flow management of a compact fluorescent lamp fixture wherein passive and/or active lamp chamber ventilation is provided through the use of vents in the lamp chamber and/or the use of a fan to induce air flow.
  • a compact light emitting diode (LED) lamp fixture comprising:
  • thermally conductive housing having a base containing a plurality of rear air vents
  • a heat sink depending from a rear surface of the base for dissipating heat from air passing out of the rear air vents
  • thermally conductive lamp support element for supporting a number of spaced apart LEDs and having a substantially central aperture for accommodating a miniature fan that is mounted so as to suck in air from a front of the lamp fixture
  • a cover having an equal number of spaced apart lenses each for propagating light emitted by a corresponding one of the LEDs
  • vent holes in the cover for passing air sucked by the fan from outside the lamp fixture into the housing so as to strike the base whereupon the air is deflected directly on to a rear surface of the lamp support element, circulates within the hollow chamber and exits through the rear air vents.
  • a method of improving the efficiency of a compact LED lamp assembly that includes a housing, a lamp support element, and a front cover, the method comprising: providing a ventilation passage from the front cover through the lamp support to a hollow chamber at a rear of the housing so that air drawn through the front cover strikes the rear of the housing and is deflected directly on to a rear surface of the lamp support element, circulates within the hollow chamber and exits through rear air vents formed in the rear of the housing;
  • Fig. 1 is an exploded pictorial representation of a lamp fixture according to the invention
  • Fig. 2 is an exploded pictorial representation of the lamp fixture shown in Fig. 1 showing direction of air flow during use;
  • Fig. 3 is an exploded rear view of the lamp fixture shown in Fig. 1;
  • Fig. 4 is partial section of the lamp fixture shown in Fig. 1 in its assembled state
  • Fig. 5 is partial section of the lamp fixture shown in Fig. 1 in its assembled state showing direction of air flow during use.
  • a compact LED lamp fixture 10 comprising a thermally conductive housing 11 having a base 12 containing a plurality of rear air vents 13.
  • a heat sink 14 having a plurality of thermally conducting vanes 15 depends from a rear surface 16 of the base for dissipating heat from air passing out of the rear air vents 13.
  • a thermally conductive lamp support element 17 is configured for supporting a plurality of spaced apart LEDs 18 and has a substantially central aperture 19 for accommodating a miniature fan 20 that is mounted so as to suck in air from a front of the lamp fixture 10.
  • At least two thermally conductive spacing elements 21 are provided on a front surface of the base for mounting the lamp support element thereon so as to form a hollow chamber 22 behind the lamp support element 17.
  • a removable cover 23 Fixed to the front of the housing is a removable cover 23 having an equal number of spaced apart lenses 24 each for propagating light emitted by a corresponding one of the LEDs.
  • a plurality of vent holes 25 are formed in the cover 23 for passing air sucked by the fan 20 from outside the lamp fixture into the housing 11 so as to strike the base 12. Air striking the base is deflected directly on to a rear surface of the lamp support element 17, circulates within the hollow chamber 22 and exits through the rear air vents 13 where it is dissipated by the heat sink 14. In circulating within the hollow chamber 22, the cool air also cools the spacing elements 21, which are preferably equal in number of the number of LEDs and are disposed directly underneath a corresponding LED. In such an arrangement, the cool air that is sucked in by the fan 20, cools the spacing elements 21 by direct impact and cools the hot spots on the lamp support element 17 via direct thermal contact with the thermally conductive spacing elements 21.
  • the fan is disposed proximate the inner metal surface of the housing behind the lamp circuit board.
  • the air that is circulated by the fan is the air which is already in the vicinity of the lamp circuit board and this air is already hot on account of the heat dissipated by the LEDS mounted on the lamp circuit board.
  • the circulation of air thus serves to cool the lamp by convection only, since it allows a constant stream of hot air to exit through the rear vent holes in the lamp housing.
  • the fan is located so as to suck in a constant stream of cool air that impinges directly on the thermally conductive spacing elements that are in direct thermal contact with the hot spots of the lamp support element. This allows more efficient cooling since heat is dissipated not only by convection but also by conduction and radiation away from the hot spots.
  • the housing 11 and the heat sink 14 are formed of a good thermally conductive material such as aluminum.
  • the spacing elements 21 may likewise be formed of aluminum and may be formed together with the housing and the heat sink as a single unit.
  • An equal number of spacing elements 21 is provided as there are LEDs, and the spacing elements 21 are spaced so that a portion of the lamp support element 17 directly behind each LED 18 is seated directly on its own spacing element 21.
  • the invention also contemplates a lamp assembly comprising the lamp fixture
  • each LED 18 may be mounted on the lamp support element 17 via an annular bead 26 that supports the LED while allowing its connection wires (not shown) to be passed through an aperture in the lamp support element 17 to a power supply terminal (not shown).
  • Mounting clips 27 are fixed to a rear surface of the housing 12 for removably attaching the lamp fixture 10 to a support bracket (not shown) in a manner that is known per se.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

L'invention porte sur un luminaire à diodes électroluminescentes (DEL) compacte, lequel luminaire comprend : un boîtier thermiquement conducteur ayant une base contenant une pluralité d'évacuations d'air arrière ; un dissipateur thermique pendant à partir d'une surface arrière de la base pour dissiper de la chaleur à partir de l'air sortant des évacuations d'air arrière ; un élément de support de lampe thermiquement conducteur pour supporter une ou plusieurs diodes électroluminescentes, et ayant une ouverture pour recevoir un ventilateur miniature ; au moins deux éléments d'espacement sur une surface avant de la base pour monter l'élément de support de lampe sur celui-ci ; un capot ayant un nombre de lentilles égal à celui des diodes électroluminescentes ; et une pluralité de trous d'évacuation dans le capot pour faire passer de l'air aspiré par le ventilateur à partir de l'extérieur du luminaire dans le boîtier de telle sorte qu'il frappe la base, après quoi l'air est dévié directement vers une surface arrière de l'élément de support de lampe.
PCT/IL2011/000171 2010-03-03 2011-02-20 Luminaire à diodes électroluminescentes ayant un ventilateur de refroidissement intégré Ceased WO2011107979A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IL204271 2010-03-03
IL20427110 2010-03-03

Publications (1)

Publication Number Publication Date
WO2011107979A1 true WO2011107979A1 (fr) 2011-09-09

Family

ID=44541707

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IL2011/000171 Ceased WO2011107979A1 (fr) 2010-03-03 2011-02-20 Luminaire à diodes électroluminescentes ayant un ventilateur de refroidissement intégré

Country Status (1)

Country Link
WO (1) WO2011107979A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013057289A2 (fr) 2011-10-21 2013-04-25 Lanxess Deutschland Gmbh Compositions catalytiques et leur utilisation pour l'hydrogénation de caoutchouc nitrile
WO2013057285A1 (fr) 2011-10-21 2013-04-25 Lanxess Deutschland Gmbh Compositions de catalyseurs et leur utilisation pour l'hydrogénation du caoutchouc nitrile
ITNA20120064A1 (it) * 2012-11-19 2014-05-20 Emmegi2000 S R L Lampada a led con raffreddamento a convezione forzata adattabile al montaggio su corpi illuminanti che non prevedono il montaggio di lampade a led
WO2016081876A1 (fr) * 2014-11-21 2016-05-26 Alter Bee Corporation Ensemble lampe à caractéristiques améliorées

Citations (5)

* 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
US20070279921A1 (en) * 2006-05-30 2007-12-06 Clayton Alexander Lighting assembly having a heat dissipating housing
US20080253125A1 (en) * 2007-04-11 2008-10-16 Shung-Wen Kang High power LED lighting assembly incorporated with a heat dissipation module with heat pipe
US20090046465A1 (en) * 2007-08-13 2009-02-19 Yasuki Hashimoto Power LED lighting assembly
US20090195159A1 (en) * 2008-02-03 2009-08-06 Smith Jerry L Led cooling system

Patent Citations (5)

* 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
US20070279921A1 (en) * 2006-05-30 2007-12-06 Clayton Alexander Lighting assembly having a heat dissipating housing
US20080253125A1 (en) * 2007-04-11 2008-10-16 Shung-Wen Kang High power LED lighting assembly incorporated with a heat dissipation module with heat pipe
US20090046465A1 (en) * 2007-08-13 2009-02-19 Yasuki Hashimoto Power LED lighting assembly
US20090195159A1 (en) * 2008-02-03 2009-08-06 Smith Jerry L Led cooling system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013057289A2 (fr) 2011-10-21 2013-04-25 Lanxess Deutschland Gmbh Compositions catalytiques et leur utilisation pour l'hydrogénation de caoutchouc nitrile
WO2013057285A1 (fr) 2011-10-21 2013-04-25 Lanxess Deutschland Gmbh Compositions de catalyseurs et leur utilisation pour l'hydrogénation du caoutchouc nitrile
ITNA20120064A1 (it) * 2012-11-19 2014-05-20 Emmegi2000 S R L Lampada a led con raffreddamento a convezione forzata adattabile al montaggio su corpi illuminanti che non prevedono il montaggio di lampade a led
WO2016081876A1 (fr) * 2014-11-21 2016-05-26 Alter Bee Corporation Ensemble lampe à caractéristiques améliorées
US10274174B2 (en) 2014-11-21 2019-04-30 Andrew Michael Schneider Lamp assembly with improved characteristics

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