EP2587139A1 - Corps de dissipation thermique et assemblage de dissipation relatif - Google Patents

Corps de dissipation thermique et assemblage de dissipation relatif Download PDF

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Publication number
EP2587139A1
EP2587139A1 EP12183462.6A EP12183462A EP2587139A1 EP 2587139 A1 EP2587139 A1 EP 2587139A1 EP 12183462 A EP12183462 A EP 12183462A EP 2587139 A1 EP2587139 A1 EP 2587139A1
Authority
EP
European Patent Office
Prior art keywords
sink
heat
skirt wall
core
auxiliary heat
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Withdrawn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
EP12183462.6A
Other languages
German (de)
English (en)
Inventor
Michele MARTINI
Frederic BORGARELLI
Fabrizio Cacchione
Alessio SAGLIOCCO
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.)
Osram GmbH
Osram SpA
Original Assignee
Osram GmbH
Osram SpA
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 Osram GmbH, Osram SpA filed Critical Osram GmbH
Publication of EP2587139A1 publication Critical patent/EP2587139A1/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Withdrawn legal-status Critical Current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
    • F21V29/70—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
    • 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
    • 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
    • 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 description relates to heat sinks.
  • Various embodiments may relate to heat sinks which can be used together with lighting devices.
  • Various embodiments can provide for a heat-sink body with a cylindrical overall shape which is provided internally with heat-sink fins and can be coupled externally to an auxiliary heat sink.
  • Various embodiments may include a primary core which can be coupled to a plurality of different auxiliary heat sinks (with a specific internal coupling geometry), in order to make it possible to boost the overall heat dissipation effect and/or to permit adaptation to different types of bodies of lighting devices.
  • an embodiment in the context of this description indicates that a particular configuration, structure or feature described in relation to the embodiment is included in at least one embodiment. Therefore, phrases such as "in one embodiment", which may occur at various points in this description, do not necessarily refer to the same embodiment. Moreover, particular forms, structures or features may be combined in any suitable manner in one or more embodiments.
  • the reference numeral 10 denotes, as a whole, a heat-sink body which is constituted, for example, by a thermally conductive material such as, for example, metals in general (e.g. aluminum), plastic, thermally conductive plastic, thermally conductive ceramic.
  • a thermally conductive material such as, for example, metals in general (e.g. aluminum), plastic, thermally conductive plastic, thermally conductive ceramic.
  • the body 10 may be constituted by a single piece of molded material.
  • the body 10 may include:
  • one end of the core 14 may be provided with a planar surface 18, for example with a circular shape, which can act as a support/mounting surface for a lighting device ("light engine” - not explicitly visible in the drawings).
  • such a device may include, for example, one or more LED light radiation sources with possibly associated electrical driving circuits.
  • the task of the heat-sink body 10 is to dissipate the heat generated by the aforementioned lighting device, which is assumed to rest precisely on the surface 18, or at least transmits heat to said surface 18.
  • the tubular skirt wall 12 has a cylindrical shape with the core element 14 extending in a central position with respect to the skirt wall 12.
  • the fins 16 can have a length (detected axially with respect to the skirt wall 12) which is longer in the vicinity of said skirt surface 12 compared to the corresponding length in the vicinity of the core 14.
  • the end of the heat-sink body 10 opposite the end where the surface 18 is provided may be provided with a cavity that can act as a receiving seat for further components, with the possibility to benefit from the heat dissipation action implemented by the fins 16.
  • the skirt wall 12 may be provided externally with a lining made of a thermal interface material such as, for example, graphite, silicone-based pastes with thermally conductive ceramic powders, thermally conductive materials in general.
  • a thermal interface material such as, for example, graphite, silicone-based pastes with thermally conductive ceramic powders, thermally conductive materials in general.
  • the aforementioned material may be provided in the form of strips which extend axially with respect to the skirt wall 12, i.e., in the exemplary embodiment under consideration here, in the direction of the generatrices of the cylindrical surface over which the skirt wall 12 extends.
  • the strips 20 can be distributed around the body 10 in a uniform angular distribution.
  • Figures 3 and 4 show the way in which a heat-sink body 10 of the type described above can be coupled to an auxiliary heat sink 22 constituted, for example, by a heat-sink material which is the same as or different to that which constitutes the body 10, for example metals in general (for example aluminum), plastics, thermally conductive plastics, thermally conductive ceramics.
  • the auxiliary heat sink 22 is in the form of a profiled tube which can be fitted on the body 10.
  • auxiliary heat sink 22 may be in the form of a section provided internally with axial ribs 24 which can make contact with the skirt wall 12 of the body 10, especially with the strips 20 thereof.
  • the body 10 and the auxiliary heat sink 22 can be coupled to one another, with the body 10 being introduced into the axial cavity of the tubular auxiliary heat sink 22 such as to give rise to a composite heat-sink assembly having heat dissipation properties which are improved compared to those which can be shown by the body 10 taken on its own.
  • the coupling schematized in figure 4 may take the form of a tight fit which is achieved such that the strips 20 arranged on the skirt wall 12 of the body 10 are wedged between the aforementioned skirt wall and the radially internal ends of the ribs 24.
  • this outcome can be achieved such that, as can be seen more clearly from figure 5 , the strips 20 are mounted on the skirt wall 12 in a general gearwheel-like arrangement (more precisely a ratchet-like arrangement), i.e. such that - in the strips 20 - one side of each strip is closer to the hub 14 than the opposite side of said strip.
  • a general gearwheel-like arrangement more precisely a ratchet-like arrangement
  • the body 10 can initially be inserted axially into the auxiliary heat sink 22, with it being made to slide axially within the auxiliary heat sink 22, with the strips 20 being kept aligned with the spaces between the ribs 24 (it is assumed that these are distributed in an angularly uniform manner over the internal surface of the auxiliary heat sink 22).
  • the body 10 and the auxiliary heat sink 22 can be made to rotate in relation to one another (in the exemplary embodiment shown here, it is assumed that the aforementioned relative movement takes place such that the body 10 rotates clockwise within the auxiliary heat sink 22), and the strips 20 move to the distal ends of the ribs 24, thereby implementing the desired wedged condition specifically because they are arranged "like a ratchet".
  • the coupling methods considered here make it possible, for example, to control and/or modify the condition of axial mounting of the body 10 within the auxiliary heat sink 22, for example such as to vary the position in which the surface 18 is found within the auxiliary heat sink 22, for example depending on the dimensions of the lighting device mounted on said surface 18.
  • sequence of figures 3 and 4 refers to a solution in which the end of the body 10 which bears the surface 18 is oriented toward the inside of the auxiliary heat sink 22, the arrangement of the body 10 inserted within the heat sink 22 may be the opposite, i.e. such as to keep the surface 18 facing toward the outside of the heat sink 22.

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)
EP12183462.6A 2011-10-28 2012-09-07 Corps de dissipation thermique et assemblage de dissipation relatif Withdrawn EP2587139A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITTO20110987 2011-10-28

Publications (1)

Publication Number Publication Date
EP2587139A1 true EP2587139A1 (fr) 2013-05-01

Family

ID=45094152

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12183462.6A Withdrawn EP2587139A1 (fr) 2011-10-28 2012-09-07 Corps de dissipation thermique et assemblage de dissipation relatif

Country Status (2)

Country Link
EP (1) EP2587139A1 (fr)
CN (1) CN103090340A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104214744A (zh) * 2014-09-01 2014-12-17 苏州骏发精密机械有限公司 立柱型led散热器
CN104565943A (zh) * 2015-01-16 2015-04-29 浙江兰普防爆照明有限公司 一种大功率led灯具
ITUA20162480A1 (it) * 2016-04-11 2017-10-11 Artemide Spa Apparecchio di illuminazione
IT201700013281A1 (it) * 2017-02-07 2018-08-07 A A G Stucchi S R L Dispositivo dissipatore di calore in particolare per l’impiego in un apparecchio di illuminazione tubolare e apparecchio di illuminazione tubolare impiegante lo stesso

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070279862A1 (en) * 2006-06-06 2007-12-06 Jia-Hao Li Heat-Dissipating Structure For Lamp
US20090185380A1 (en) * 2008-01-17 2009-07-23 Ho Sung Tao LED Lamp with Heat Dissipating Configuration
EP2180249A1 (fr) * 2008-10-24 2010-04-28 Hyundai Telecommunication Co., Ltd. Projecteur de type DEL circulaire utilisant un nano-diffuseur
US20100301724A1 (en) * 2009-06-01 2010-12-02 Yu-Lin Chu Lamp Having An Enhanced Heat Radiating Effect

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070279862A1 (en) * 2006-06-06 2007-12-06 Jia-Hao Li Heat-Dissipating Structure For Lamp
US20090185380A1 (en) * 2008-01-17 2009-07-23 Ho Sung Tao LED Lamp with Heat Dissipating Configuration
EP2180249A1 (fr) * 2008-10-24 2010-04-28 Hyundai Telecommunication Co., Ltd. Projecteur de type DEL circulaire utilisant un nano-diffuseur
US20100301724A1 (en) * 2009-06-01 2010-12-02 Yu-Lin Chu Lamp Having An Enhanced Heat Radiating Effect

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104214744A (zh) * 2014-09-01 2014-12-17 苏州骏发精密机械有限公司 立柱型led散热器
CN104565943A (zh) * 2015-01-16 2015-04-29 浙江兰普防爆照明有限公司 一种大功率led灯具
ITUA20162480A1 (it) * 2016-04-11 2017-10-11 Artemide Spa Apparecchio di illuminazione
IT201700013281A1 (it) * 2017-02-07 2018-08-07 A A G Stucchi S R L Dispositivo dissipatore di calore in particolare per l’impiego in un apparecchio di illuminazione tubolare e apparecchio di illuminazione tubolare impiegante lo stesso

Also Published As

Publication number Publication date
CN103090340A (zh) 2013-05-08

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