EP1710497B1 - Column lighting device with a heat dissipation device - Google Patents

Column lighting device with a heat dissipation device Download PDF

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Publication number
EP1710497B1
EP1710497B1 EP06111378A EP06111378A EP1710497B1 EP 1710497 B1 EP1710497 B1 EP 1710497B1 EP 06111378 A EP06111378 A EP 06111378A EP 06111378 A EP06111378 A EP 06111378A EP 1710497 B1 EP1710497 B1 EP 1710497B1
Authority
EP
European Patent Office
Prior art keywords
lighting device
column
cover
dissipator
light source
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.)
Not-in-force
Application number
EP06111378A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1710497A2 (en
EP1710497A3 (en
Inventor
Giannunzio Guzzini
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.)
Iguzzini Illuminazione SpA
Original Assignee
Iguzzini Illuminazione 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 Iguzzini Illuminazione SpA filed Critical Iguzzini Illuminazione SpA
Priority to SI200630075T priority Critical patent/SI1710497T1/sl
Priority to PL06111378T priority patent/PL1710497T3/pl
Publication of EP1710497A2 publication Critical patent/EP1710497A2/en
Publication of EP1710497A3 publication Critical patent/EP1710497A3/en
Application granted granted Critical
Publication of EP1710497B1 publication Critical patent/EP1710497B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • F21S8/081—Lighting devices intended for fixed installation with a standard of low-built type, e.g. landscape light
    • F21S8/083—Lighting devices intended for fixed installation with a standard of low-built type, e.g. landscape light of bollard type, i.e. with lighting fixture integrated into the standard or mounted on top of it and having substantially the same diameter
    • 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
    • F21V29/75—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with fins or blades having different shapes, thicknesses or spacing
    • 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
    • F21V29/505—Cooling arrangements characterised by the adaptation for cooling of specific components of reflectors
    • 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
    • F21W2111/00—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
    • F21W2111/02—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00 for roads, paths or the like

Definitions

  • the present invention relates to a column lighting device with particular solutions which allow the dissipation of the heat generated in its interior by the light source.
  • a column lighting device is proposed, of the bollard type, equipped with means capable of effectively dissipating heat externally, preventing an excessive increase in the inside and outside temperature.
  • a column lighting device with a heat dissipation device representing the closest state of the art is known from document US-A-4 293 899 .
  • Documents EP-A2-0 751 339 and DE 10 76 811 B disclose heat dissipators provided on the external surface of lighting devices.
  • Column lighting devices of the known type also called bollards
  • column lighting devices of the known type can be divided into two groups, with respect to the positioning of the light source and, inevitably, heat : column lighting devices in which the light source is situated in the upper part of the column and column lighting devices in which the light source is situated in the lower part of the column.
  • the heat dispersion capacity towards the outside of the devices of the first group depends to a large extent on the size of the shield, i.e. of that portion of their side surface, situated at a height coinciding with or close to that of the light source, which allows the passage of light towards the outside.
  • these light devices can be subdivided into two subgroups: a first subgroup in which the shield has reduced dimensions and consequently a lesser capacity of dispersing heat externally, and a second subgroup in which the shield has ample dimensions and consequently a greater capacity of dispersing heat externally.
  • the devices belonging to the first subgroup which are preferred as, in virtue of the reduced dimensions of the shield, they allow a greater visual comfort to be obtained, it is therefore necessary to use glass shields which resist the high temperatures reached, but which do not have characteristics of infrangibility and are consequently particularly subject to damage. In some cases, attempts have been made to solve this problem by giving the lighting device a form availing of protected positions for the glass shield, but undesirably reducing the lighting capacity of the device.
  • the outward dispersion of heat produces fewer difficulties.
  • the shield is in any case situated in the upper portion of the column, the light emitted from the light source must pass through a space which extends as far as a reflector element, situated close to the shield, which reflects it outwardly.
  • the temperature inside the device reaches less high temperatures with respect to the devices in which the light source is positioned in the upper portion of the column.
  • the shield reaches lower temperatures.
  • This type of lighting device therefore allows shields with reduced dimensions to be produced, satisfying the requirements of visual comfort and at the same time allowing thermoplastic materials to be used for the shield, obtaining characteristics of infrangibility.
  • the limit of these devices however, consists in the low lighting yield due to the non-optimum reflection capacity of the light towards the outside.
  • a main objective of the present invention is therefore to provide a column lighting device which is able to combine the demands for visual comfort, by means of a shield with reduced dimensions, with those of safety and mechanical resistance, maintaining the temperature within such limits as to allow the use of thermoplastic and infrangible materials, without jeopardizing the lighting yield.
  • a further objective of the present invention is to provide a column lighting device which is easy and economical to produce and handle.
  • the upper portion 1 of a column lighting device is sustained by the walls 2 of a supporting column, and comprises a housing 3 for a light source 4, in turn covered by a cover 5.
  • the portion of the side surface of the housing 3 which allows the passage of light i.e. which is included between the upper edge of the walls 2 of the supporting column and the lower edge of the cover 5, represents the light passage portion of the lighting device and consists of a shield 6, made of a light transparent material, preferably a thermoplastic and infrangible material such as polycarbonate.
  • the light source 4 consists of an emitting bulb 7, surrounded by a glass ampoule 8.
  • the emitting bulb 7 is situated at a greater height with respect to the shield 6.
  • a reflector 9 Immediately above the emitting bulb 7, there is a reflector 9, with a curved section, having a concavity facing downwards.
  • the reflector 9, in the embodiment shown in figure 1 is centrally perforated to allow it to be positioned slightly above the emitting bulb 7, i.e. to house the upper part of the ampoule 8 in the space defined between the reflector 9 and the cover 5.
  • the light source 4 there is a cylindrically-shaped, transparent casing 10, preferably made of glass, optionally coloured, which completely surrounds the light source 4 and physically separates the central housing area 3, which houses the light source 4, from the more peripheral areas of the same housing 3.
  • the function of the casing 10 is to prevent an excessive overheating of the air in the housing 3, the hot air rising upwards and being sent through the single opening in correspondence with the central hole of the reflector 9.
  • the light source 4 there is also a light absorbing shield 11, whose upper edge is situated slightly below the position of the emitting bulb 7, and is at least at the same height as the lower edge of the cover 5.
  • the function of the shield 11, in cooperation with the edge of the cover 5, is to prevent light from being emitted from the lighting device 1 in a direction parallel to the ground.
  • a dissipator 12 whose form largely corresponds to that of the reflector 9 to maximize the contact surface therewith, in the central portion, in correspondence with the perforation of the reflector 9, it defines a cylindrical recess 13 for the housing of the portion of the light source 4 which passes through the hole of the reflector, and in the peripheral portion it has a flap 14 for coupling with a support 15 and which is in contact with the cover 5.
  • a series of ribbings 16 On the upper side of the dissipator 12 there is a series of ribbings 16, whose function is to increase the radiating surface and allow a more effective dispersion of heat upwards. A part of the dissipator 12 is in direct contact with the cover 5 of the lighting device.
  • the dissipator 12 acquires heat in its lower portion and releases it through its upper portion.
  • the dissipator 12 is heated by direct irradiation on the part of the light source 4, and to a minimum extent by air convection, in particular in correspondence with its portion which defines the recess 13 which houses the upper portion of the light source 4, and by conduction in its portion in contact with the reflector 9.
  • the dissipator 12 releases heat by irradiation and convection through its upper surface, maximized by the presence of the ribbings 16, and by conduction through its portion in contact with the cover 5.
  • the support 15 is coupled with the shield 6 (in turn fixed to the body of the column of the lighting device) and therefore with the rest of the lighting device, as well as with the dissipator 12 and the cover 5.
  • the coupling between the cover 5 and the support 15 is obtained by the housing of a series of conical teeth 17 of the cover 5 in corresponding conical seats 18 of the support 15.
  • the fixing between the cover 5 and the support 15 can be ensured by a single headless screw 19.
  • the cover 5 which can have any form, is also equipped on the inner side with a series of ribbings 23 arranged in the perimetric portion in contact with the flap 14.
  • the coupling means between the various elements of the column lighting device according to the embodiment illustrated in figure 1 are all situated inside the body of the device and are invisible from the outside, except for the headless screw.
  • the outer surface of the device is aesthetically extremely clean.
  • FIGS. 2 and 3 show alternative embodiments of the couplings between the shield 6, the support 15, the dissipator 12 and the cover 5, the remaining aspects of the lighting device shown being identical to those illustrated in figure 1 .
  • the dissipator 12 substitutes the support 15 in its coupling function with the cover 5, as it is equipped with conical seats 20 for the conical teeth 17 of the cover 5, and its more peripheral portion 21 is visible from the outside, covering part of the shield 6.
  • Embodiments in which the coupling between the cover 5 and the underlying support 15 i.e. the dissipator 12, in the embodiment shown in figure 2
  • the coupling between the cover 5 and the underlying support 15 should obviously be considered perfectly equivalent to the embodiments illustrated with the help of the enclosed figures.
  • the cover 5 of the lighting device can also be fixed to the underlying element by other coupling means, with screws or by insertion.
  • the column lighting device allows an optimum and uniform heat distribution over the whole upper portion, and in particular on the whole surface of the cover 5, avoiding overheating of the specific portions of the surface.
  • column lighting device forms a solution which is simple and economical to effect and handle.
  • the forms, as also the materials, of the lighting device of the invention can differ from those shown for purely illustrative purposes.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP06111378A 2005-04-08 2006-03-20 Column lighting device with a heat dissipation device Not-in-force EP1710497B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SI200630075T SI1710497T1 (sl) 2005-04-08 2006-03-20 Stebrna razsvetljevalna naprava z napravo za disipacijo toplote
PL06111378T PL1710497T3 (pl) 2005-04-08 2006-03-20 Słupowe urządzenie oświetleniowe z urządzeniem rozpraszającym ciepło

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000596A ITMI20050596A1 (it) 2005-04-08 2005-04-08 Dispositivo di illuminazione a colonna con dispositivo di dissipazione di calore

Publications (3)

Publication Number Publication Date
EP1710497A2 EP1710497A2 (en) 2006-10-11
EP1710497A3 EP1710497A3 (en) 2007-04-18
EP1710497B1 true EP1710497B1 (en) 2008-06-11

Family

ID=36579550

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06111378A Not-in-force EP1710497B1 (en) 2005-04-08 2006-03-20 Column lighting device with a heat dissipation device

Country Status (11)

Country Link
EP (1) EP1710497B1 (it)
CN (1) CN1844733B (it)
AT (1) ATE398265T1 (it)
DE (1) DE602006001420D1 (it)
DK (1) DK1710497T3 (it)
ES (1) ES2308656T3 (it)
IT (1) ITMI20050596A1 (it)
NO (1) NO20061492L (it)
PL (1) PL1710497T3 (it)
PT (1) PT1710497E (it)
SI (1) SI1710497T1 (it)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102384417A (zh) * 2011-10-31 2012-03-21 江苏西门控电器有限公司 Led路灯

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE558137A (it) * 1955-10-10 1900-01-01
US4293899A (en) * 1978-12-21 1981-10-06 Sanner George E Luminaire
US5528474A (en) * 1994-07-18 1996-06-18 Grote Industries, Inc. Led array vehicle lamp
EP0751339A3 (en) * 1995-06-30 1998-05-06 CUNNINGHAM, David W. Lighting fixture having a cast reflector
CN2637895Y (zh) * 2003-07-18 2004-09-01 北京雅新石光照明器材有限公司 天然岩石照明灯具

Also Published As

Publication number Publication date
ATE398265T1 (de) 2008-07-15
DE602006001420D1 (de) 2008-07-24
EP1710497A2 (en) 2006-10-11
PL1710497T3 (pl) 2008-12-31
DK1710497T3 (da) 2008-10-20
ITMI20050596A1 (it) 2006-10-09
EP1710497A3 (en) 2007-04-18
ES2308656T3 (es) 2008-12-01
CN1844733B (zh) 2010-10-06
CN1844733A (zh) 2006-10-11
NO20061492L (no) 2006-10-09
PT1710497E (pt) 2008-09-19
SI1710497T1 (sl) 2008-12-31

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