EP2672176A1 - Light projecting device - Google Patents

Light projecting device Download PDF

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Publication number
EP2672176A1
EP2672176A1 EP13160509.9A EP13160509A EP2672176A1 EP 2672176 A1 EP2672176 A1 EP 2672176A1 EP 13160509 A EP13160509 A EP 13160509A EP 2672176 A1 EP2672176 A1 EP 2672176A1
Authority
EP
European Patent Office
Prior art keywords
projector
fan
casing
heat sink
light projection
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Withdrawn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
EP13160509.9A
Other languages
German (de)
French (fr)
Inventor
Piero Gandini
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.)
Antares Iluminacion SA
Original Assignee
Antares Iluminacion SA
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 Antares Iluminacion SA filed Critical Antares Iluminacion SA
Publication of EP2672176A1 publication Critical patent/EP2672176A1/en
Withdrawn legal-status Critical Current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
    • F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • F21V21/14—Adjustable mountings
    • F21V21/30—Pivoted housings or frames
    • 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
    • F21V29/677—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 discharging
    • 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
    • F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • F21V21/34—Supporting elements displaceable along a guiding element
    • 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
    • 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
    • F21V7/00—Reflectors for light sources
    • 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 present invention relates to a light projection device, of the type comprising: a projector equipped with a casing which houses at least one lighting element, a heat sink, and a fan; and a connection element for the securing of the projector to a rail or support element; said connection element having therein the necessary electronics for the connection of the device to a power point and the power supply of the projector.
  • This invention is applicable in the lighting apparatus manufacturing sector.
  • Light projection devices are very well known in the market, mainly designed for interior light applications and basically formed by a projector coupled in positionable manner to a connection element which allows its securing to a rail or support element, and which has therein the necessary electronics for the power supply of the projector and its connection to a power point which may be integrated in a support rail.
  • a projection device of this type is disclosed in document EP2042804 of the same holder of the present invention, although the objective of protection of said document are automatic actuation means for the longitudinal movement of an adapter with respect to a support rail.
  • this type of projection devices have a heat sink inside the casing of, generally of aluminium, and a fan responsible for causing air circulation which extracts the heat released by the lighting elements from the projector casing, performing a refrigeration or cooling of the heat sink.
  • the fan is disposed above the sink for which reason said fan is also exposed to the rising heat released by the lighting elements.
  • the objective of the invention is the development of a light projection device, which being of the type of those described above has construction characteristics aimed at providing effective ventilation inside the casing and achieve a suitable refrigeration of the LEDS or lighting elements contributing to improving their performance and avoiding a reduction in the useful life thereof.
  • the light projection device object of this invention is of the type mentioned previously and which comprises: a projector equipped with a casing which houses at least one LED-type lighting element, a heat sink, and a fan; and a connection element for the securing of the projector to a rail or support element, said connection element having therein the necessary electronics for the power supply of the projector and its connection to a power point.
  • the projector has peripheral front and rear openings at opposite ends of the casing, respectively delimited by a support element of a light reflector and by a rear cap.
  • Said front and rear openings are intercommunicated inside the casing, through longitudinal passages defined in the heat sink and which form areas of passage of the cooling air suctioned by the fan through the rear opening and driven by said fan towards the front opening.
  • Another advantage is that the air circulation inside the longitudinal passages of the heat sink guarantees its correct cooling, preventing its excessive heating.
  • the light projection device comprises a projector equipped with a casing (1) which houses therein a LED-type lighting element (2), a heat sink (3), and a fan (4).
  • the projector is connected to a connection element (5) for its securing to a support "C" rail, which may be an electrified rail; the connection element (5) having therein the necessary electronics for the power supply of the projector.
  • the project has peripheral front and rear openings (6, 7), respectively, at opposite ends of the casing (1).
  • the front opening (6) of the casing (1) is delimited by a support element (8) of a reflector (9) which is disposed aligned with the LED or lighting element (2).
  • the rear opening (7) is delimited by the casing (1) and by a rear cap (10).
  • Said front and rear openings (6, 7) are intercommunicated inside the casing (1) through longitudinal passages (11) defined in the heat sink (3); defining areas of passage of the cooling air which is suctioned by the fan (4) through the rear opening (7) and driven by the fan (4) towards the front opening (6).

Landscapes

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

Abstract

Light projection device comprising a projector with a casing (1) with at least one lighting element (2), a heat sink (3), a fan (4) and a connection element (5) for fixing it to a rail, wherein the projector has front and rear openings (6,7) delimited by a support element (8) of a reflector (9) and by a rear cap (10) and wherein the openings are communicated through longitudinal passages (11), which determine areas of passage of the cooling air, suctioned by the fan (4) through the rear opening (7) and driven towards the front opening (6), avoiding in this way to expose the fan to the heat released by the lighting elements and that the device overheats.

Description

    Object of the invention.
  • The present invention relates to a light projection device, of the type comprising: a projector equipped with a casing which houses at least one lighting element, a heat sink, and a fan; and a connection element for the securing of the projector to a rail or support element; said connection element having therein the necessary electronics for the connection of the device to a power point and the power supply of the projector.
    • Field of application of the invention.
  • This invention is applicable in the lighting apparatus manufacturing sector.
    • Background of the invention.
  • Light projection devices are very well known in the market, mainly designed for interior light applications and basically formed by a projector coupled in positionable manner to a connection element which allows its securing to a rail or support element, and which has therein the necessary electronics for the power supply of the projector and its connection to a power point which may be integrated in a support rail.
  • A projection device of this type is disclosed in document EP2042804 of the same holder of the present invention, although the objective of protection of said document are automatic actuation means for the longitudinal movement of an adapter with respect to a support rail.
  • There is currently the tendency to use in this type of projection devices, and in others of different characteristics, one or several lighting elements formed by LEDS, since they have a useful life and consumption appreciably lower than other lighting elements, e.g. halogen lamps, or incandescent lamps.
  • However, a drawback of these light projection devices that use LEDS as lighting elements is the high amount of heat dissipated, which causes the heating of the casing and the other neighbouring elements such as the connection element in the case of light projection devices of the type mentioned.
  • This concentration of heat also negatively affects the performance and the useful life of the LED meaning that an objective of the manufacturers of this type of devices is to achieve the greatest possible dissipation of the heat released by the LEDS.
  • In this regard, it is habitual that this type of projection devices have a heat sink inside the casing of, generally of aluminium, and a fan responsible for causing air circulation which extracts the heat released by the lighting elements from the projector casing, performing a refrigeration or cooling of the heat sink.
  • Generally, in this type of spotlights the fan is disposed above the sink for which reason said fan is also exposed to the rising heat released by the lighting elements.
  • On the other hand, the incorporation and disposal of these elements inside the casing provides limited results as regards the heat dissipation capacity.
  • Therefore, the objective of the invention is the development of a light projection device, which being of the type of those described above has construction characteristics aimed at providing effective ventilation inside the casing and achieve a suitable refrigeration of the LEDS or lighting elements contributing to improving their performance and avoiding a reduction in the useful life thereof.
    • Description of the invention.
  • The light projection device object of this invention is of the type mentioned previously and which comprises: a projector equipped with a casing which houses at least one LED-type lighting element, a heat sink, and a fan; and a connection element for the securing of the projector to a rail or support element, said connection element having therein the necessary electronics for the power supply of the projector and its connection to a power point.
  • To achieve the proposed objectives, and in accordance with the invention, the projector has peripheral front and rear openings at opposite ends of the casing, respectively delimited by a support element of a light reflector and by a rear cap.
  • Said front and rear openings are intercommunicated inside the casing, through longitudinal passages defined in the heat sink and which form areas of passage of the cooling air suctioned by the fan through the rear opening and driven by said fan towards the front opening.
  • Given that these light projection devices are normally disposed in a raised position and with the lighting element directed downward, with the previous disposal, the heat released by the lighting elements, which tends to be displaced in rising direction towards the rear end or area of the casing, is driven by the fan towards the lower area and released to the outside through the front opening disposed peripherally around the light reflector support element.
  • Several advantages are achieved with this disposal among which we can mention that the fan is not exposed to the heat released by the lighting elements, since during their operation the heat displaces towards the lower area of the light, preventing it from falling on the fan.
  • Another advantage is that the air circulation inside the longitudinal passages of the heat sink guarantees its correct cooling, preventing its excessive heating.
  • These and other advantages of the invention shall be more clearly appreciated in light of an example of embodiment of the light projection device of the invention shown in the figures described below.
    • Description of the figures.
  • To complement the description being made and in order to aid towards a better understanding of the characteristics of the invention, in accordance with a preferred example of practical embodiment thereof, a set of drawings is attached as an integral part of said specification wherein, with illustrative and non-limiting character, the following has been represented:
    • Figure 1 shows a schematic elevation view of an example of embodiment of the light projection device according to the invention mounted on an electrified support rail.
    • Figure 2 shows a partial perspective view of the device wherein a quadrant of the casing and the elements housed therein have been shown in cross-section to allow their observation.
    • Figure 3 shows a partial elevation view of the light projection device according to the invention wherein the projector has been shown in cross-section by its vertical middle plane and wherein the areas of air passage therein have been shown with broken lines.
    Preferred embodiment of the invention.
  • In the example of embodiment shown in the attached figures, the light projection device comprises a projector equipped with a casing (1) which houses therein a LED-type lighting element (2), a heat sink (3), and a fan (4).
  • In the example shown the projector is connected to a connection element (5) for its securing to a support "C" rail, which may be an electrified rail; the connection element (5) having therein the necessary electronics for the power supply of the projector.
  • As can be observed in the attached figures, the project has peripheral front and rear openings (6, 7), respectively, at opposite ends of the casing (1).
  • The front opening (6) of the casing (1) is delimited by a support element (8) of a reflector (9) which is disposed aligned with the LED or lighting element (2).
  • The rear opening (7) is delimited by the casing (1) and by a rear cap (10).
  • Said front and rear openings (6, 7) are intercommunicated inside the casing (1) through longitudinal passages (11) defined in the heat sink (3); defining areas of passage of the cooling air which is suctioned by the fan (4) through the rear opening (7) and driven by the fan (4) towards the front opening (6).
  • Having adequately described the nature of the invention and an example of a preferred embodiment, it must be noted that the materials, form, size and layout of the described elements may be modified, provided that this does not involve altering the essential characteristics of the invention described in the following claims.

Claims (1)

  1. Light projection device comprising:
    a projector equipped with a casing (1) which houses at least one lighting element (2), a heat sink (3) and a fan (4), and
    a connection element (5) for the securing of the projector to a rail or support element,
    said connection element (5) having therein the necessary electronics for the power supply of the projector, characterized in that the projector has peripheral front and rear openings (6, 7) at opposite ends of the casing (1), respectively delimited by a support element (8) of a reflector (9), and by a rear cap (10); said front and rear openings (6, 7) being communicated inside the casing (1), through longitudinal passages (11) defined in the heat sink (3) and which form areas of passage of cooling air, suctioned by the fan (4) through the rear opening (7), and driven by the fan towards the front opening (6).
EP13160509.9A 2012-06-05 2013-03-21 Light projecting device Withdrawn EP2672176A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES201230617U ES1077248Y (en) 2012-06-05 2012-06-05 LIGHT PROJECTOR DEVICE

Publications (1)

Publication Number Publication Date
EP2672176A1 true EP2672176A1 (en) 2013-12-11

Family

ID=46177637

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13160509.9A Withdrawn EP2672176A1 (en) 2012-06-05 2013-03-21 Light projecting device

Country Status (2)

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EP (1) EP2672176A1 (en)
ES (1) ES1077248Y (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3736489A1 (en) * 2019-05-08 2020-11-11 Leedarson Lighting Co., Ltd. Spot downlight apparatus
CN113405034A (en) * 2021-05-28 2021-09-17 东阿县妇幼保健院(东阿县妇幼保健计划生育服务中心) Special all-round irradiation formula arm lamp of gynaecology and obstetrics doctor

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202009000699U1 (en) * 2009-01-16 2009-03-26 Rd System-Leuchten Ag Bulb module with an LED assembly
EP2042804A2 (en) 2007-09-28 2009-04-01 Antares Iluminacion, S.A. Suspended projector
US20100204841A1 (en) * 2007-09-07 2010-08-12 Koninklijke Philips Electronics N.V. Methods and apparatus for providing led-based spotlight illumination in stage lighting applications
US20100220488A1 (en) * 2009-02-27 2010-09-02 Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. Led lamp
WO2011131197A1 (en) * 2010-04-23 2011-10-27 Martin Professional A/S Led light fixture with background lighting using controlled inbetween diffused light group
US20120033419A1 (en) * 2010-08-06 2012-02-09 Posco Led Company Ltd. Optical semiconductor lighting apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100204841A1 (en) * 2007-09-07 2010-08-12 Koninklijke Philips Electronics N.V. Methods and apparatus for providing led-based spotlight illumination in stage lighting applications
EP2042804A2 (en) 2007-09-28 2009-04-01 Antares Iluminacion, S.A. Suspended projector
DE202009000699U1 (en) * 2009-01-16 2009-03-26 Rd System-Leuchten Ag Bulb module with an LED assembly
US20100220488A1 (en) * 2009-02-27 2010-09-02 Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. Led lamp
WO2011131197A1 (en) * 2010-04-23 2011-10-27 Martin Professional A/S Led light fixture with background lighting using controlled inbetween diffused light group
US20120033419A1 (en) * 2010-08-06 2012-02-09 Posco Led Company Ltd. Optical semiconductor lighting apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3736489A1 (en) * 2019-05-08 2020-11-11 Leedarson Lighting Co., Ltd. Spot downlight apparatus
CN113405034A (en) * 2021-05-28 2021-09-17 东阿县妇幼保健院(东阿县妇幼保健计划生育服务中心) Special all-round irradiation formula arm lamp of gynaecology and obstetrics doctor

Also Published As

Publication number Publication date
ES1077248U (en) 2012-06-21
ES1077248Y (en) 2012-09-17

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