EP1826481B1 - Lamp - Google Patents

Lamp Download PDF

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Publication number
EP1826481B1
EP1826481B1 EP07102624A EP07102624A EP1826481B1 EP 1826481 B1 EP1826481 B1 EP 1826481B1 EP 07102624 A EP07102624 A EP 07102624A EP 07102624 A EP07102624 A EP 07102624A EP 1826481 B1 EP1826481 B1 EP 1826481B1
Authority
EP
European Patent Office
Prior art keywords
lamp
housings
electronic components
wings
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.)
Active
Application number
EP07102624A
Other languages
German (de)
French (fr)
Other versions
EP1826481A1 (en
Inventor
José Lasso Lucea
Moisés Mir Mauri
Pere Viñeta Obiols
Francesc Casanellas Bassols
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.)
Vitri Electro Metalurgica SA
Original Assignee
Vitri Electro Metalurgica 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 Vitri Electro Metalurgica SA filed Critical Vitri Electro Metalurgica SA
Priority to PL07102624T priority Critical patent/PL1826481T3/en
Publication of EP1826481A1 publication Critical patent/EP1826481A1/en
Application granted granted Critical
Publication of EP1826481B1 publication Critical patent/EP1826481B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
    • 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
    • F21K9/20—Light sources comprising attachment means
    • F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
    • 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
    • F21V29/76—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
    • F21V29/767—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section the planes containing the fins or blades having directions perpendicular to the light emitting axis
    • 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
    • F21V3/00—Globes; Bowls; Cover glasses
    • 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
    • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
    • F21V29/89—Metals
    • 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

  • Lamps provided with light-emitting diodes are known.
  • the main advantages of these lamps are its long lifetime and its low energy consumption.
  • a generic lamp is known from EP-A-1 577 613 .
  • Said prior art diode lamps have drawbacks in evacuating the heat produced by its inside electronic components, thus reducing its lifetime and usefulness. It has also been proved that said lamps do not show a good air or water tightness either.
  • the object of the present invention is to solve the known prior art devices drawbacks, providing a lamp comprising all the features of claim 1.
  • the lamp of the invention can be used for replacing the usual incandescent lamps used in traffic-lights in a simple and fast manner, as if they were replaced by another incandescent lamp. This avoids the need to dismantle the traffic-light front part.
  • the cooling wings comprise at least part of the outer surface of at least one of the housings.
  • the housings and the cooling wings are made of a conducting material of the heat caused by said electronic components and diodes.
  • the heat conducting material is a metallic material, more specifically, aluminium.
  • the lamp comprises a sealing resin arranged inside the housings so as to prevent the water or air from entering into said housings and to increase the evacuation of the heat caused by the electronic components and the light-emitting diodes towards the outside of the lamp.
  • the sealing resin is of the epoxy type.
  • This sealing resin keeps the housings tightness and, in combination with the wings, improves the heat transmission from the housings inside to the lamp outside. Thus, it is avoided the use of prior art rubber joints, which normally loose tightness due to sudden temperature changes to which they are subjected.
  • connection means to an electric power supply comprise a threaded metallic cap.
  • FIG. 1 A drawing is attached to facilitate the description of what has been disclosed above, in which, diagrammatically and only as a non-limitative example, a practical case of embodiment of the invention is shown.
  • This drawing shows a longitudinal cross-section of the lamp of the present invention.
  • the lamp 1 of the invention comprises a main body 2 which includes some cooling wings 3 in its outer surface extending perpendicularly with respect to the longitudinal axis of the lamp 1.
  • Said main body 2 defines a housing 4 in which the electronic components of the lamp 1 are located.
  • the lamp 1 comprises another frontal housing 6defined in one of the ends of the main body 2, in which a plurality of light-emitting diodes 7 are located. Said housing 6 is frontally closed by a transparent dome 8.
  • the main body 2 wings 3 extends through a part of the outer surface of the lamp 1, more specifically through part of the outer surface of both housings 4, 6. These wings 3 are meant to evacuate to the maximum the heat produced by the operation of the electronic components and the diodes 7 arranged inside the housings 4, 6. In this way, the heat is transmitted from inside the housings 4, 6 through the its walls directly towards the wings 3.
  • the body 2 and the wings 3 will be total or partially made of any good heat conducting material or materials, preferably of aluminium.
  • the outer diameter of the lamp 1 is smaller than the diameter of this type of prior art lamps, since the contact surface with the outside is increased, thus making more easy the heat removal without the need of enlarging the outer diameter.
  • the housings 4, 6 could be filled with sealing resin 9, of the epoxy or another type, good heat transmitting, so as to improve the evacuation of the heat generated by the elements arranged inside both housings 4, 6 towards the outside of the lamp and to provide the needed tightness to prevent the water or air from entering said housings 4, 6 in whatever condition.
  • the resin 9 can be arranged nearby close to the internal wall of the housings 4, 6.
  • the lamp 1 includes also a standard threaded cap 10 for the electricity supplying of the lamp 1 components by connecting it to an electric network connected terminal.
  • cooling wings 3 comprise many substantially parallel layers which extends in a plane perpendicular to the lamp longitudinal axis, the wings configuration and arrangement can vary depending on the lamp 1 design and specific needs.

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)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

Lamp (1) comprising connection means (10) to an electric power supply, a housing (4) comprising lamp (1) electronic components (5), and a housing (6) comprising a plurality of light-emitting diodes (7), characterized in that it comprises some cooling wings (3) in the outer lamp (1) surface for the evacuation of the heat caused by said electronic components (5) and by the diodes (7) towards the outside of the lamp (1).

Description

    BACKGROUND OH THE INVENTION
  • Lamps provided with light-emitting diodes (LEDS) are known. The main advantages of these lamps are its long lifetime and its low energy consumption.
  • A generic lamp is known from EP-A-1 577 613 .
  • It is known the use of this sort of lamps for the replacement of conventional incandescent lamps used in traffic lights.
  • Said prior art diode lamps have drawbacks in evacuating the heat produced by its inside electronic components, thus reducing its lifetime and usefulness. It has also been proved that said lamps do not show a good air or water tightness either.
  • In a few existing models, heat removal improvements have been tried by providing large diameter lamps. A drawback of these lamps is that this diameter enlargement obstructs the easy incandescent lamp replacement, since in many cases said replacement is carried out from behind the lamp support, through an opening which fits the incandescent lamp diameter. If there is not enough room for the diodes lamp to pass through said opening, the traffic-light frontal part has to be dismantled so as to install the lamp.
  • Moreover, lack of tightness in said diode lamps often leads to failures owing to water condensation. Some lamp models include rubber joints, but the pressures and depressions caused by the great thermal changes to which the traffic light lamps are subjected provoke, in the long term, the air entrance from the outside, whose humidity condensates inside the lamps.
    • DESCRIPTION OF THE INVENTION
  • The object of the present invention is to solve the known prior art devices drawbacks, providing a lamp comprising all the features of claim 1.
  • Thanks to this cooling wings it is possible to efficiently evacuate the heat from the inside of the lamp without enlarging its outer diameter. Therefore, thanks to its reduced dimensions, the lamp of the invention can be used for replacing the usual incandescent lamps used in traffic-lights in a simple and fast manner, as if they were replaced by another incandescent lamp. This avoids the need to dismantle the traffic-light front part.
  • Preferably, the cooling wings comprise at least part of the outer surface of at least one of the housings.
  • Advantageously, the housings and the cooling wings are made of a conducting material of the heat caused by said electronic components and diodes.
  • Preferably, the heat conducting material is a metallic material, more specifically, aluminium.
  • According to an embodiment of the present invention, the lamp comprises a sealing resin arranged inside the housings so as to prevent the water or air from entering into said housings and to increase the evacuation of the heat caused by the electronic components and the light-emitting diodes towards the outside of the lamp.
  • Preferably, the sealing resin is of the epoxy type.
  • This sealing resin keeps the housings tightness and, in combination with the wings, improves the heat transmission from the housings inside to the lamp outside. Thus, it is avoided the use of prior art rubber joints, which normally loose tightness due to sudden temperature changes to which they are subjected.
  • Preferably, the connection means to an electric power supply comprise a threaded metallic cap.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • A drawing is attached to facilitate the description of what has been disclosed above, in which, diagrammatically and only as a non-limitative example, a practical case of embodiment of the invention is shown. This drawing shows a longitudinal cross-section of the lamp of the present invention.
    • DESCRIPTION OF A PREFERRED EMBODIMENT
  • As it can be seen in the drawing, the lamp 1 of the invention comprises a main body 2 which includes some cooling wings 3 in its outer surface extending perpendicularly with respect to the longitudinal axis of the lamp 1.
  • Said main body 2 defines a housing 4 in which the electronic components of the lamp 1 are located.
  • The lamp 1 comprises another frontal housing 6defined in one of the ends of the main body 2, in which a plurality of light-emitting diodes 7 are located. Said housing 6 is frontally closed by a transparent dome 8.
  • As it can be observed, the main body 2 wings 3 extends through a part of the outer surface of the lamp 1, more specifically through part of the outer surface of both housings 4, 6. These wings 3 are meant to evacuate to the maximum the heat produced by the operation of the electronic components and the diodes 7 arranged inside the housings 4, 6. In this way, the heat is transmitted from inside the housings 4, 6 through the its walls directly towards the wings 3.
  • The body 2 and the wings 3 will be total or partially made of any good heat conducting material or materials, preferably of aluminium.
  • Thanks to said wings 3, the outer diameter of the lamp 1 is smaller than the diameter of this type of prior art lamps, since the contact surface with the outside is increased, thus making more easy the heat removal without the need of enlarging the outer diameter.
  • The housings 4, 6 could be filled with sealing resin 9, of the epoxy or another type, good heat transmitting, so as to improve the evacuation of the heat generated by the elements arranged inside both housings 4, 6 towards the outside of the lamp and to provide the needed tightness to prevent the water or air from entering said housings 4, 6 in whatever condition. The resin 9 can be arranged nearby close to the internal wall of the housings 4, 6.
  • The lamp 1 includes also a standard threaded cap 10 for the electricity supplying of the lamp 1 components by connecting it to an electric network connected terminal.
  • Even though in the described embodiment the cooling wings 3 comprise many substantially parallel layers which extends in a plane perpendicular to the lamp longitudinal axis, the wings configuration and arrangement can vary depending on the lamp 1 design and specific needs.

Claims (8)

  1. Lamp (1) comprising connection means (10) to an electric power supply, a housing (4) comprising lamp (1) electronic components (5), and a housing (6) comprising a plurality of light-emitting diodes (7), and some cooling wings (3) in the outer lamp (1) surface for the evacuation of the heat caused by said electronic components (5) and by the diodes (7) towards the outside of the lamp (1) characterized in that said cooling wings (3) extend perpendicularly with respect to the longitudinal axis of the lamp.
  2. Lamp (1), according to claim 1, characterized in that the cooling wings (3) comprise at least part of the outer surface of at least one of the housings (4, 6).
  3. Lamp (1), according to any of the previous claims, characterized in that the housings (4, 6) and the cooling wings (3) are made of a conducting material.
  4. Lamp (1), according to claim 3, characterized in that the heat conducting material is a metallic material.
  5. Lamp (1), according to claim 4, characterized in that the heat conducting material is aluminium.
  6. Lamp (1), according to any of the previous claims, characterized in that it comprises a sealing resin (9) arranged inside the housings (4, 6) so as to prevent water or air from entering said housings (4, 6) and to increase the evacuation of the heat caused by the electronic components (5) and the light-emitting diodes (7) towards the outside of the lamp (1).
  7. Lamp (1), according to claim 6, characterized in that the sealing resin (9) is of the epoxy type.
  8. Lamp (1), according to any of the previous claims, characterized in that the connection means to an electric power supply comprise a threaded metallic cap (10).
EP07102624A 2006-02-24 2007-02-19 Lamp Active EP1826481B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07102624T PL1826481T3 (en) 2006-02-24 2007-02-19 Lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES200600439A ES2288394B1 (en) 2006-02-24 2006-02-24 LAMP EQUIPPED WITH HEAT DISSIPER MEDIA.

Publications (2)

Publication Number Publication Date
EP1826481A1 EP1826481A1 (en) 2007-08-29
EP1826481B1 true EP1826481B1 (en) 2008-10-08

Family

ID=38009761

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07102624A Active EP1826481B1 (en) 2006-02-24 2007-02-19 Lamp

Country Status (5)

Country Link
EP (1) EP1826481B1 (en)
AT (1) ATE410642T1 (en)
DE (1) DE602007000154D1 (en)
ES (2) ES2288394B1 (en)
PL (1) PL1826481T3 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008058757A1 (en) * 2008-11-19 2010-05-20 M I P Center Gmbh Lighting device for lighting purposes and luminaire with such a lighting device
ES2361879B1 (en) * 2008-11-20 2012-06-22 Lidolight Saving Energy, S.L. LUMINARY.
IT1396849B1 (en) * 2009-11-20 2012-12-20 Lomar S R L MODULAR LED LIGHTING MULTI-LIGHTING SYSTEM, AND ITS MODULAR LED LIGHT.
US8227961B2 (en) 2010-06-04 2012-07-24 Cree, Inc. Lighting device with reverse tapered heatsink
US20130155697A1 (en) * 2010-06-11 2013-06-20 Wise Innovations Technologies Sarl System for led cooling
WO2012091364A2 (en) * 2010-12-30 2012-07-05 금강전기(주) Led lighting apparatus and method for manufacturing same
KR101263763B1 (en) 2011-12-07 2013-05-13 금강전기 (주) Led lighting unit

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5791770A (en) * 1997-02-27 1998-08-11 Aavid Thermal Products, Inc. Light source cooler for LCD monitor
US6864513B2 (en) * 2003-05-07 2005-03-08 Kaylu Industrial Corporation Light emitting diode bulb having high heat dissipating efficiency
US7196459B2 (en) * 2003-12-05 2007-03-27 International Resistive Co. Of Texas, L.P. Light emitting assembly with heat dissipating support
DE102004011974A1 (en) * 2004-03-10 2005-09-22 Conrad Electronic Gmbh Illuminant for a lighting device
US7145179B2 (en) * 2004-10-12 2006-12-05 Gelcore Llc Magnetic attachment method for LED light engines
TWM278828U (en) * 2005-05-11 2005-10-21 Shiu Yung Yuan LED planar light source module

Also Published As

Publication number Publication date
ES2288394A1 (en) 2008-01-01
PL1826481T3 (en) 2009-04-30
ES2288394B1 (en) 2008-11-16
EP1826481A1 (en) 2007-08-29
ATE410642T1 (en) 2008-10-15
DE602007000154D1 (en) 2008-11-20
ES2316122T3 (en) 2009-04-01

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