WO2016071812A1 - Appareil d'éclairage public à del à échange thermique amélioré - Google Patents

Appareil d'éclairage public à del à échange thermique amélioré Download PDF

Info

Publication number
WO2016071812A1
WO2016071812A1 PCT/IB2015/058388 IB2015058388W WO2016071812A1 WO 2016071812 A1 WO2016071812 A1 WO 2016071812A1 IB 2015058388 W IB2015058388 W IB 2015058388W WO 2016071812 A1 WO2016071812 A1 WO 2016071812A1
Authority
WO
WIPO (PCT)
Prior art keywords
container body
lighting apparatus
led
array
street lighting
Prior art date
Application number
PCT/IB2015/058388
Other languages
English (en)
Inventor
Luca MOSCATELLO
Original Assignee
Enel Sole S.R.L.
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 Enel Sole S.R.L. filed Critical Enel Sole S.R.L.
Publication of WO2016071812A1 publication Critical patent/WO2016071812A1/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
    • 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
    • F21V23/008—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 outside the housing of the lighting device
    • 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
    • F21S8/08—Lighting devices intended for fixed installation with a standard
    • F21S8/085—Lighting devices intended for fixed installation with a standard of high-built type, e.g. street light
    • F21S8/088—Lighting devices intended for fixed installation with a standard of high-built type, e.g. street light with lighting device mounted on top of the standard, e.g. for pedestrian zones
    • 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
    • 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
    • F21W2131/10—Outdoor lighting
    • F21W2131/103—Outdoor lighting of streets or roads
    • 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
    • F21Y2105/00—Planar light sources
    • F21Y2105/10—Planar light sources comprising a two-dimensional array of point-like light-generating elements
    • 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 the technical field of LED lighting apparatuses and, in particular, relates to an LED public or street lighting apparatus.
  • LEDs Light Emitting Diodes
  • LEDs allow producing lighting apparatuses characterised by greater flexibility of use, greater energy efficiency and a higher modularity.
  • LED lighting apparatuses generally comprise a plurality of LEDs, equipped with related optics and reflectors, appropriate heat sinks and power supply means suitable to supply the necessary power supply current to the plurality of LEDs.
  • the object of this description is to make available an LED public or street lighting apparatus that solves or reduces, at least partially, the aforesaid drawback .
  • Figure 1 is a bottom perspective view of an embodiment of an LED public or street lighting apparatus.
  • Figure 2 is a side plan view of the apparatus of Figure 1.
  • Figure 3 is a top plan view of the apparatus of Figure 1.
  • Figure 4 is a bottom perspective view of the LED pubic or street lighting apparatus of Figure 1 with some parts detached.
  • Figure 5 is a perspective view of a first variant embodiment of the apparatus of Figure 1.
  • Figure 6 is a perspective view of a second variant embodiment of the apparatus of Figure 1.
  • the LED public or street lighting apparatus 1 (henceforth referred to, without thereby introducing any limitation, as “LED lighting apparatus”) comprises a first container body 2 and at least one array of LEDs 3 housed in the first container body 2.
  • the lighting apparatus 1 is installed on the top of a vertical support post 20 and is intended for the lighting of urban areas, for example, public areas such as bridges, pedestrian malls, squares, parks and gardens.
  • the LED lighting apparatus 1 comprises two arrays of LEDs 3 each arranged on a rectangular or square-shaped matrix.
  • the example shown in the figures in which are provided two arrays of LEDs 3 it being understood that variant embodiments are possible in which is provided a single array of LEDs 3 or more than two arrays of LEDs and that these variant embodiments all fall within the claimed scope of protection.
  • each of the LEDs of the arrays of LEDs 3 is surmounted or covered by a respective lens of an array of refraction lenses.
  • these lenses are injection moulded in polymethyl methacrylate (PMMA) .
  • the arrays of LEDs 3 are such as to direct the optical radiation emitted towards the ground of an urban area to be illuminated .
  • the first container body 2 comprises one or more housing seats adapted to house the arrays of LEDs 3, for example to house the printed circuit boards that support the arrays of LEDs 3.
  • Said one or more housing seats are watertight, adapted to protect the arrays of LEDs from infiltrations of water, humidity or dust .
  • the aforesaid one or more housing seats are closed by a protective screen 4 that at least frontally to the arrays of LED 3 is made of a material transparent to the optical radiation emitted by the arrays of LEDs 3.
  • the protective screen 4 comprises a plate of glass or transparent crystal, possibly anti-reflection to reduce the coefficient of attenuation of the luminous radiation passing through.
  • the first container body 2 is made of a thermally conductive material, for example metal, which preferably has a high thermal conductivity. More preferably, the first container body 2 is made of aluminium or an aluminium alloy, and is for example formed in one piece by die-casting.
  • the arrays of LEDs 3 are fixed on a support, such as a printed circuit board, fixed to and in contact with an inner wall of the first container body 2, so that it is possible to extract the heat produced by the LEDs and transfer it by conduction to the first container body 2.
  • the extracted heat can thus be advantageously dissipated through the same first container body 2, which thus acts as a passive heat sink.
  • the first container body 2 is provided with a heat dissipation system comprising an array of through apertures 10 that pass through the first container body 2.
  • said through apertures 10 extend between two opposite sides of the first container body 2 crossing the thickness of the first container body 2 laterally in relation to the array of LEDs 3. More preferably, the array of through apertures 10 surrounds the at least one housing seat of the array of LEDs 3.
  • the through apertures 10 are laterally closed channels made in the thickness of the first container body 2.
  • the aforesaid through openings 10 extend inside the first container body 2 each in a respective direction of extension perpendicular to the LED array 3.
  • the array of through apertures 10 extends at least partially along a peripheral outer edge of the first container body 2.
  • the array of through apertures 10 comprises a plurality of through apertures 10 evenly arranged all along the aforesaid peripheral outer edge. So, it is understood how, in this embodiment, the first container body 2 comprises, along an outer peripheral edge, a perforated radiator comprising a plurality of radiant cells constituted by the walls that surround the through apertures 10.
  • the first container body 2 is essentially disc-shaped having a disc axis and the through apertures 10 are distributed around the disc axis along a portion of the outer circular rim of the first container body 2 or all along the aforesaid circular rim.
  • the first container body 2 comprises a central portion 11 of greater thickness and a lateral portion 12 of lesser thickness which surrounds the central portion 11 and the through apertures 10 are placed along the aforesaid lateral portion 12.
  • the central portion 11 of greater thickness presents a projection of a truncated conical shape or rounded shape in relation to the lateral portion 12 of lesser thickness.
  • the aforesaid projection has a convex shape, for example in the form of a cap.
  • the LED lighting apparatus 1 comprises at least one support element 5 of the first container body 2.
  • the aforesaid at least one support element 5 comprises two support arms 5 each having a first end portion 5' fixed to the first container body 2, in the example fixed to an outer edge of the first container body 2.
  • the two support arms 5 are arranged in diametrically opposite positions along a generatrix of a cone.
  • the support arms 5 may be of tubular bars or bars with a "U" or "C” profile, so that, inside at least one of them, a channel can be defined suitable to house at least one electrical interconnection element, such as for example at least one unipolar or multipolar conductor provided with insulating sheath.
  • the LED lighting apparatus 1 comprises a second container body 6 spaced from the first container body 2 through the aforesaid support element, i.e., in the example, by means of the two arms 5.
  • each of said arms 5 has a second end portion 5", opposite to the first end portion, which is fixed to the second container body 6.
  • the second container body 6 comprises a base portion 7 having an inner housing compartment accessible via an aperture and a removable cover 8, removably coupleable to the base portion 7 in correspondence of said aperture to occlude the interior and ensure a desired degree of water tightness of the interior compartment.
  • the aforesaid support element of the first container body 2 is fixed to the removable cover 8.
  • the second ends 5 ' ' of the arms 5 are fixed to the cover 8.
  • the second container body 6, the removable cover 8 and the arms 5 are made of metal, for example aluminium.
  • the second container body 6 has the shape of a truncated cone and the cover 8 is a disk that represents the larger base of the truncated cone.
  • the LED lighting apparatus 1 inside the second container body 6, the LED lighting apparatus 1 comprises a driver module of the arrays of LEDs 3, i.e., an electric module adapted to supply the arrays of LEDs a driving current required for operation of the LEDs 3.
  • the electrical interconnection between the driver module and the arrays of LED 3 is realised by means of electrical interconnection elements and, for example, one or more cables, which extend from the second container body 6 to the first container body 2 passing inside the at least one support element 5.
  • the second container body 6 comprises at least one attachment element 16 adapted to secure the second container body 7 and therefore the whole entire LED lighting apparatus 1 to a support device.
  • the second container body 7 comprises an engagement seat inside of which can be engaged the head of a vertical post 20 as shown in Figure 1.
  • the support element for example the arms 5, and the first container body 2 are mutually detachably coupled so that it is possible to fix the first container body 2 to the support element, for example to the two arms 5, so as to turn the arrays of LEDs 3 toward the second container body 7 or in the opposite direction.
  • the arrays of LEDs 3 are oriented towards the second container body 6 and the LED lighting apparatus 1 is fixed to the head of a straight vertical post 20.
  • the arrays of LEDs 3 are oriented in a direction opposite the second container body 6 and the LED lighting apparatus 1 is fixed to the head of a post 21 with a curved upper end portion.
  • the LED lighting apparatus is fixed to a support arm, fastened on the wall of a building or on a straight vertical pole.
  • the arrays of LEDs 3 are instead oriented in a direction opposite the second container body 6 and the LED lighting apparatus 1 is suspended from a horizontal rope 22 by means of an attachment device 22.
  • the lighting apparatus 1 allows fully achieving the intended purposes in terms of overcoming the drawbacks of the known art.
  • the array of through apertures 10 allows dissipating the heat produced by the LEDs but, with respect to the known laminar structures, is much less vulnerable to the accumulation of dust and dirt. Moreover, since when it rains the rain water flows in the through apertures 10 crossing them, any undesired accumulations are removed.
  • LED lighting apparatus 1 by means of the LED lighting apparatus 1 according to this description, it is possible to provide a public lighting apparatus, such as, for example, a lamp post for public or street lighting comprising a lighting apparatus according to this description and a support post 20,21, a support bracket on a post or arm or an attachment device 18 to a rope 20 to which said LED lighting apparatus 1 is attached.
  • a public lighting apparatus such as, for example, a lamp post for public or street lighting comprising a lighting apparatus according to this description and a support post 20,21, a support bracket on a post or arm or an attachment device 18 to a rope 20 to which said LED lighting apparatus 1 is attached.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

La présente invention concerne un appareil d'éclairage public à DEL (1) qui comprend un premier corps de conteneur (2) constitué d'un matériau thermoconducteur et au moins un réseau de DEL (3) logé dans le premier corps de conteneur (2), le premier corps de conteneur (2) étant équipé d'un système de dissipation de chaleur comprenant un agencement d'ouvertures débouchantes (10) qui traversent le premier corps de conteneur (2).
PCT/IB2015/058388 2014-11-04 2015-10-30 Appareil d'éclairage public à del à échange thermique amélioré WO2016071812A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITRM20140639 2014-11-04
ITRM2014A000639 2014-11-04

Publications (1)

Publication Number Publication Date
WO2016071812A1 true WO2016071812A1 (fr) 2016-05-12

Family

ID=52273393

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2015/058388 WO2016071812A1 (fr) 2014-11-04 2015-10-30 Appareil d'éclairage public à del à échange thermique amélioré

Country Status (1)

Country Link
WO (1) WO2016071812A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090296392A1 (en) * 2008-05-27 2009-12-03 Ruud Lighting, Inc. Led lighting fixture
EP2172693A1 (fr) 2008-10-01 2010-04-07 Enel Sole S.r.L. Dispositif d'éclairage à émission optimisée
CN201662030U (zh) * 2009-12-09 2010-12-01 苏州中泽光电科技有限公司 穿孔网格led路灯
US20110235329A1 (en) * 2010-03-24 2011-09-29 Apack, Inc. Lamp Using LED
US20110291561A1 (en) * 2010-05-25 2011-12-01 Hon Hai Precision Industry Co., Ltd. Led lamp
US20130051038A1 (en) * 2010-09-06 2013-02-28 Icepipe Corporation Led lighting device and streetlight device having same
EP2746652A1 (fr) 2012-11-30 2014-06-25 Fivep S.p.a. Dispositif d'éclairage à DEL

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090296392A1 (en) * 2008-05-27 2009-12-03 Ruud Lighting, Inc. Led lighting fixture
EP2172693A1 (fr) 2008-10-01 2010-04-07 Enel Sole S.r.L. Dispositif d'éclairage à émission optimisée
CN201662030U (zh) * 2009-12-09 2010-12-01 苏州中泽光电科技有限公司 穿孔网格led路灯
US20110235329A1 (en) * 2010-03-24 2011-09-29 Apack, Inc. Lamp Using LED
US20110291561A1 (en) * 2010-05-25 2011-12-01 Hon Hai Precision Industry Co., Ltd. Led lamp
US20130051038A1 (en) * 2010-09-06 2013-02-28 Icepipe Corporation Led lighting device and streetlight device having same
EP2746652A1 (fr) 2012-11-30 2014-06-25 Fivep S.p.a. Dispositif d'éclairage à DEL

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