WO2012095584A2 - Diode bulb having a heat sink - Google Patents

Diode bulb having a heat sink Download PDF

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Publication number
WO2012095584A2
WO2012095584A2 PCT/FR2012/000012 FR2012000012W WO2012095584A2 WO 2012095584 A2 WO2012095584 A2 WO 2012095584A2 FR 2012000012 W FR2012000012 W FR 2012000012W WO 2012095584 A2 WO2012095584 A2 WO 2012095584A2
Authority
WO
WIPO (PCT)
Prior art keywords
radiator
skirt
light
emitting diode
diode bulb
Prior art date
Application number
PCT/FR2012/000012
Other languages
French (fr)
Other versions
WO2012095584A3 (en
Inventor
Emmanuel Corre
Original Assignee
Homelights
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 Homelights filed Critical Homelights
Publication of WO2012095584A2 publication Critical patent/WO2012095584A2/en
Publication of WO2012095584A3 publication Critical patent/WO2012095584A3/en

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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
    • 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
    • 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
    • F21K9/238—Arrangement or mounting of circuit elements integrated in the light source
    • 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
    • F21V23/004—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 arranged on a substrate, e.g. a printed circuit board
    • F21V23/006—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 arranged on a substrate, e.g. a printed circuit board the substrate being distinct from the light source holder
    • 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
    • F21V29/773—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 the planes containing the fins or blades having the direction of 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
    • 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
    • F21V29/507—Cooling arrangements characterised by the adaptation for cooling of specific components of means for protecting lighting devices from damage, e.g. housings
    • 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
    • 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 invention relates to a light source of the light emitting diode type.
  • incandescent filament bulbs with light sources of the type known as CFL or LED abbreviations.
  • CFL Compact fluorescent lamps
  • Light emitting diode lamps do not have the disadvantages of CFL bulbs and may be smaller in size.
  • the LEDs are driven by electronics that are also sensitive to high temperatures (degradation of performance and degradation of the life of components).
  • LED lamps are generally constructed as follows:
  • a control electronics is housed in a tube whose one end is close to the light source (LED).
  • This tube is engaged in an axial housing of a part forming a radiator which will dissipate the heat produced by the light source.
  • the piece forming a radiator externally has fins that increase the exchange surface with the outside.
  • the dimensioning of the fins and their number makes it possible to determine the quantity of energy that can be dissipated.
  • This radiator is sometimes covered with a belt whose function is to avoid touching the radiator directly when it is hot.
  • WO2010 / 066841 discloses a lamp with radiator which further comprises a skirt concentric radiator. This skirt is heated by radiation because the zone of contact with the radiator is weak. The air circulating between the skirt and the radiator decreases the effect of the radiation and therefore the efficiency of the skirt.
  • the electronics are housed in a tube whose main function is to electrically isolate the electronic module from the radiator part which is often made of aluminum and incidentally constitutes a thermal protection of the electronics by the nature of the material.
  • a contact is made between the diode and this radiator.
  • the outer section of the tubular support is identical to the internal section of the radiator housing.
  • the invention proposes to improve the amount of energy dissipated.
  • the subject of the invention is a light-emitting diode bulb comprising a light source, a tubular support housing an electronic control of the light source and a concentric radiator to the tubular support, this bulb being characterized in that a skirt made of a good heat conducting material mounted concentrically to the radiator is in contact with the radiator to form an additional dissipator and this skirt has lights for the circulation of air.
  • FIG 1 a burst of a light bulb
  • FIG 2 an axial section
  • FIG 3 the radiator
  • FIG 4 the additional sink
  • FIG 5 The additional heat sink mounted on the radiator
  • FIG 6 a cross section of the tubular support mounted in the radiator.
  • FIG 7 and 8 bulb variants Referring to the drawing, we see a LED bulb type.
  • This light-emitting diode bulb 1 comprises a light source 4, a tubular support 2 housing a control electronics 3 of the source 4 of light, a radiator 5 concentric to the tubular support having, optionally, radial fins 6.
  • a metal base 7 screw or bayonet located at the base is at least one electrical contact for powering the bulb.
  • An at least translucent bulb 8 caps the light source.
  • the overall shape of the radiator is a truncated cone, the small base being located at the base and the large base at the bulb
  • This light source 4 is constituted by one or more light-emitting diodes.
  • a skirt 9 of good heat conducting material mounted concentrically to the radiator is in contact with the radiator 5 to form an additional dissipator and this skirt has lights 10A, 10B for the circulation of air.
  • the skirt covers the radiator.
  • the skirt is in contact with the positioning means (at both ends) and when the radiator comprises fins, with the edges of the fins of the radiator for conductive heat transfer.
  • the geometry of the skirt 9 is adapted for placing the skirt in force and tightening the skirt on the fins.
  • the edges of the fins 6 are in pressure contact on the inner face of the skirt so as to transmit the heat of the fins to the skirt.
  • the edge of the fins of the radiator is shaped to conform to the surface of the skirt on an extent close to the thickness of the strip.
  • the bearing surface of each lamella has a width of the order of the thickness of said lamella.
  • the strength assembly can be obtained by sizing the parts. The purpose of this assembly in force is not to use the thermal paste however a thermal paste could be put in place prior to the establishment of the skirt.
  • the outer surface of the skirt is without rib but this outer face 9A of the skirt 9 could also include ribs or reliefs participating in the dissipation.
  • the ribs of the skirt are in planes parallel to the small base so as to promote cooling when the bulb is lying down.
  • the skirt comprises at its two ends means 11, 12 of strict positioning on the ends of the radiator, said means being optionally located so that their implementation deforms the skirt so that the contact with the fins is accentuated.
  • the positioning means 1 1, 12 are of the interlocking type of a male part in a female part, the interlocking being possible in a single direction in view of the frustoconical shape.
  • the positioning means 1 1 located at the level of the small base of the skirt are tongues 1 1A radial which are housed in the recesses of a crenel 1 1B of the small base of the radiator and support the bottom of the crenel of the radiator . These means form stops for stopping in translation.
  • the edge of the radiator has slats 12 A in the form of crenellations projecting from the plane of the large base, said slats coming to fit in the imprints 12B presented in the thickness of the edge of the skirt.
  • the flexibility of the lamellae 12A allows, by geometrical construction, an elastic application of the lamellae on the internal face of the skirt. It is at this level that the source generates the heat. It is therefore at this level that it is necessary to improve the contact between the two parts for a faster transfer of calories from the radiator to the skirt.
  • the high and low position of the positioning means guides the assembly constraint.
  • This skirt constituting an additional dissipator to the radiator also forms a casing which delimits a coaxial chamber to the radiator.
  • This room is connected to the outside by lights 10A, 10B arranged to create a flow of air between the room and the outside.
  • the lights of the skirt are divided into two groups, one 10A locating near one end of the skirt and the other 10B near the other end so as to create a circulation.
  • the lights can be parallel to the bases or inclined.
  • the circulation of air produced by the heat and the lights of the skirt is channeled along the longitudinal axis of the bulb.
  • edges of the fins are applied to the inner face of the skirt, they partition the chamber surrounding the radiator and so there are provided notches 14 in the fins of the radiator which allow a transverse circulation. These notches are arranged in two planes parallel to the plane of the small base.
  • the notches close to the small base are in a plane which coincides with that containing a group of lights 10B so as to limit the viscous effects of the air and to allow a thermal pumping effect (self-ventilation).
  • the objective of the heat dissipation is to maintain the LED in a nominal operating temperature range so as to obtain the best efficiency and to protect the control electronics from the source and more precisely to avoid exceeding the critical operating temperature. certain sensitive components.
  • This electronics is housed in a tubular support 2 whose material has been chosen to be an electrical and thermal insulator. This tubular support is housed in an axial housing of the radiator 5.
  • the energy dissipated by the radiator 5 towards the tubular support 2 thus heats the inside of the tube.
  • the outer face 2A of the tubular support 2 has centering means 17 holding said outer lateral face of the tubular support spaced from the inner face 15 of the housing 15 of the radiator to define a concentric insulating chamber 16.
  • the end face of the tubular support is spaced from the housing bottom by means of the pads 17 which are also provided on this end face.
  • centering means are studs 17 and / or ribs 17 with reduced contact surfaces.
  • the studs are conical or the ribs have a triangular section.
  • ribs 17 which slide in grooves 18 for immobilization in rotation.
  • the skirt is made of a good heat conducting material such as aluminum, copper, ceramics, etc. in opposition to so-called plastic materials derived from petroleum.
  • the thickness of this skirt is low to improve the conduction.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

The invention relates to a light-emitting diode bulb including a light source, a tubular mounting (2) housing an electronic unit for controlling the light source, and a radiator (5) that is concentric to the tubular mounting, said bulb being characterized in that a highly heat-conductive skirt (9) is concentrically mounted onto the radiator and is in contact with the radiator so as to form a supplementary heat sink, and said skirt has channels (10A and 10B) for circulating air.

Description

AMPOULE A DIODE AVEC DISSIPATEUR  DIODE BULB WITH DISSIPATOR
L'invention se rapporte à une source de lumière du type à diodes électroluminescente. The invention relates to a light source of the light emitting diode type.
Pour réduire la consommation d'énergie, il est préconisé de substituer aux ampoules à filament incandescent des sources de lumière du type connues sous les abréviations CFL ou LED. To reduce the energy consumption, it is recommended to replace incandescent filament bulbs with light sources of the type known as CFL or LED abbreviations.
Les lampes fluorescentes compactes (CFL) ont un inconvénient majeur qui est leur encombrement. En effet, à ce jour on ne sait pas produire des lampes de petites tailles comme cela était possible avec les ampoules à filament. Par ailleurs, l'allumage de ces lampes nécessite un délai et une mise en température que les utilisateurs n'aiment pas. Compact fluorescent lamps (CFL) have a major drawback which is their size. Indeed, to date it is not known to produce lamps of small sizes as was possible with the filament bulbs. Moreover, the lighting of these lamps requires a delay and warming up that users do not like.
Les lampes à diode électroluminescente ne présentent pas les inconvénients des ampoules CFL et peuvent être de taille plus réduite. Light emitting diode lamps do not have the disadvantages of CFL bulbs and may be smaller in size.
Elles présentent cependant des inconvénients lorsqu'on souhaite augmenter le flux lumineux . However, they have disadvantages when it is desired to increase the luminous flux.
En effet, plus la température de fonctionnement est haute, plus les diodes électroluminescentes perdent en performances. De plus, les LED sont pilotées par une électronique qui est elle aussi sensible aux températures élevées (dégradation du rendement et dégradation de la durée de vie des composants). Indeed, the higher the operating temperature, the more light emitting diodes lose performance. In addition, the LEDs are driven by electronics that are also sensitive to high temperatures (degradation of performance and degradation of the life of components).
Sur ces lampes à diode on estime que 75% de l'énergie consommée est transformée en chaleur. On these diode lamps it is estimated that 75% of the energy consumed is converted into heat.
Pour augmenter le flux lumineux, Il faut consommer plus d'énergie et donc produire plus chaleur. Les lampes type « LED » sont généralement construites de la manière suivante : To increase the luminous flux, it is necessary to consume more energy and thus to produce more heat. LED lamps are generally constructed as follows:
Une électronique de commande est logée dans un tube dont l'une des extrémités se trouve à proximité de la source de lumière (LED). A control electronics is housed in a tube whose one end is close to the light source (LED).
Ce tube est engagé dans un logement axial d'une pièce formant un radiateur qui va dissiper la chaleur produite par la source de lumière. This tube is engaged in an axial housing of a part forming a radiator which will dissipate the heat produced by the light source.
Pour la dissipation, la pièce formant un radiateur présente extérieurement des ailettes qui augmentent la surface d'échange avec l'extérieur. For dissipation, the piece forming a radiator externally has fins that increase the exchange surface with the outside.
Le dimensionnement des ailettes et leur nombre permet de déterminer la quantité d'énergie pouvant être dissipée. The dimensioning of the fins and their number makes it possible to determine the quantity of energy that can be dissipated.
Ce radiateur est parfois recouvert d'une ceinture qui a pour fonction d'éviter de toucher directement le radiateur lorsqu'il est chaud. This radiator is sometimes covered with a belt whose function is to avoid touching the radiator directly when it is hot.
Pour dissiper plus de chaleur, il n'est pas possible d'augmenter la taille du radiateur car la contrainte d'encombrement des lampes ne permet pas de le faire pour les lampes de substitution. To dissipate more heat, it is not possible to increase the size of the radiator because the congestion constraint of the lamps does not make it possible for the replacement lamps.
On connaît WO2010/066841 une lampe avec radiateur qui comprend en plus une jupe concentrique au radiateur. Cette jupe est chauffée par radiation car la zone de contact avec le radiateur est faible. L'air qui circule entre la jupe et le radiateur diminue l'effet de la radiation et donc l'efficacité de la jupe. WO2010 / 066841 discloses a lamp with radiator which further comprises a skirt concentric radiator. This skirt is heated by radiation because the zone of contact with the radiator is weak. The air circulating between the skirt and the radiator decreases the effect of the radiation and therefore the efficiency of the skirt.
Comme précisé plus avant, l'électronique est logée dans un tube qui a pour fonction principale d'isoler électriquement le module électronique de la pièce formant un radiateur qui est souvent en aluminium et incidemment constitue une protection thermique de l'électronique par la nature du matériau. As mentioned above, the electronics are housed in a tube whose main function is to electrically isolate the electronic module from the radiator part which is often made of aluminum and incidentally constitutes a thermal protection of the electronics by the nature of the material.
Un contact est réalisé entre la diode et ce radiateur. Pour éviter les mouvements du support dans le logement, la section externe du support tubulaire est identique à la section interne du logement du radiateur. A contact is made between the diode and this radiator. To avoid the movements of the support in the housing, the outer section of the tubular support is identical to the internal section of the radiator housing.
L'invention se propose d'améliorer la quantité d'énergie dissipée. The invention proposes to improve the amount of energy dissipated.
A cet effet, l'invention a pour objet une ampoule à diode électroluminescente comprenant une source de lumière, un support tubulaire logeant une électronique de commande de la source de lumière et un radiateur concentrique au support tubulaire, cette ampoule étant caractérisée en ce qu'une jupe en matériau bon conducteur de la chaleur montée concentrique au radiateur est en contact avec le radiateur pour former un dissipateur supplémentaire et cette jupe présente des lumières pour la circulation de l'air. To this end, the subject of the invention is a light-emitting diode bulb comprising a light source, a tubular support housing an electronic control of the light source and a concentric radiator to the tubular support, this bulb being characterized in that a skirt made of a good heat conducting material mounted concentrically to the radiator is in contact with the radiator to form an additional dissipator and this skirt has lights for the circulation of air.
L'invention sera bien comprise à l'aide de la description ci après faite à titre d'exemple non limitatif en regard du dessin qui représente : The invention will be better understood from the following description given by way of non-limiting example with reference to the drawing which represents:
FIG 1 : un éclaté d'une ampoule FIG 1: a burst of a light bulb
FIG 2 une coupe axiale FIG 3 : le radiateur FIG 2 an axial section FIG 3: the radiator
FIG 4 : le dissipateur supplémentaire FIG 4: the additional sink
FIG 5 :Le dissipateur supplémentaire monté sur le radiateur FIG 5: The additional heat sink mounted on the radiator
FIG 6 : une coupe transversale du support tubulaire monté dans le radiateur. FIG 6: a cross section of the tubular support mounted in the radiator.
FIG 7 et 8 : des variantes d'ampoule En se reportant au dessin, on voit une ampoule type LED. FIG 7 and 8: bulb variants Referring to the drawing, we see a LED bulb type.
Cette ampoule 1 à diode électroluminescente comprend une source 4 de lumière, un support tubulaire 2 logeant une électronique 3 de commande de la source 4 de lumière, un radiateur 5 concentrique au support tubulaire présentant, éventuellement, des ailettes 6 radiales. This light-emitting diode bulb 1 comprises a light source 4, a tubular support 2 housing a control electronics 3 of the source 4 of light, a radiator 5 concentric to the tubular support having, optionally, radial fins 6.
Un culot 7 métallique à vis ou à baïonnette localisé à la base constitue au moins un contact électrique pour alimenter l'ampoule. A metal base 7 screw or bayonet located at the base is at least one electrical contact for powering the bulb.
Un bulbe 8 au moins translucide coiffe la source de lumière. An at least translucent bulb 8 caps the light source.
La forme globale du radiateur est un tronc de cône, la petite base étant située au niveau du culot et la grande base au niveau du bulbe The overall shape of the radiator is a truncated cone, the small base being located at the base and the large base at the bulb
Cette source 4 de lumière est constituée par une ou plusieurs diodes électroluminescentes. This light source 4 is constituted by one or more light-emitting diodes.
Avantageusement, une jupe 9 en matériau bon conducteur de la chaleur montée concentrique au radiateur est en contact avec le radiateur 5 pour former un dissipateur supplémentaire et cette jupe présente des lumières 10A, 10B pour la circulation de l'air. La jupe couvre le radiateur. Advantageously, a skirt 9 of good heat conducting material mounted concentrically to the radiator is in contact with the radiator 5 to form an additional dissipator and this skirt has lights 10A, 10B for the circulation of air. The skirt covers the radiator.
La jupe est en contact au niveau des moyens de positionnement ( aux deux extrémités) et lorsque le radiateur comporte des ailettes, avec les bords des ailettes du radiateur pour un transfert thermique par conduction. The skirt is in contact with the positioning means (at both ends) and when the radiator comprises fins, with the edges of the fins of the radiator for conductive heat transfer.
Avantageusement, la géométrie de la jupe 9 est adaptée pour une mise en place de la jupe en force et serrage de la jupe sur les ailettes. Les bords des ailettes 6 sont en contact avec pression sur la face interne de la jupe en sorte de transmettre la chaleur des ailettes vers la jupe. Le bord des ailettes du radiateur est conformé pour épouser la surface de la jupe sur une étendue proche de l'épaisseur de la lamelle. La portée d'appui de chaque lamelle a une largeur de l'ordre de l'épaisseur de la dite lamelle. L'assemblage en force peut être obtenu par le dimensionnement des pièces. Le but de cet assemblage en force est de ne pas utiliser de la pate thermique cependant une pate thermique pourrait être mise en place préalablement à la mise en place de la jupe. Advantageously, the geometry of the skirt 9 is adapted for placing the skirt in force and tightening the skirt on the fins. The edges of the fins 6 are in pressure contact on the inner face of the skirt so as to transmit the heat of the fins to the skirt. The edge of the fins of the radiator is shaped to conform to the surface of the skirt on an extent close to the thickness of the strip. The bearing surface of each lamella has a width of the order of the thickness of said lamella. The strength assembly can be obtained by sizing the parts. The purpose of this assembly in force is not to use the thermal paste however a thermal paste could be put in place prior to the establishment of the skirt.
Dans la forme de réalisation représentée, la surface externe de la jupe est sans nervure mais cette face 9A externe de la jupe 9 pourrait comporter également des nervures ou des reliefs participant à la dissipation. In the embodiment shown, the outer surface of the skirt is without rib but this outer face 9A of the skirt 9 could also include ribs or reliefs participating in the dissipation.
Suivant une forme de réalisation de ces nervures sur la jupe, les nervures de la jupe seraient dans des plans parallèles à la petite base de sorte à favoriser le refroidissement lorsque l'ampoule est couchée. According to one embodiment of these ribs on the skirt, the ribs of the skirt are in planes parallel to the small base so as to promote cooling when the bulb is lying down.
Pour l'assemblage, la jupe comprend à ses deux extrémités des moyens 11, 12 de positionnement strict sur les extrémités du radiateur, les dits moyens étant éventuellement localisés pour que leur mise en place déforme la jupe de sorte que le contact avec les ailettes soit accentué. For assembly, the skirt comprises at its two ends means 11, 12 of strict positioning on the ends of the radiator, said means being optionally located so that their implementation deforms the skirt so that the contact with the fins is accentuated.
Les moyens 1 1, 12 de positionnement sont du type à emboîtement d'une partie maie dans une partie femelle, l'emboîtement étant possible dans un seul sens compte tenu de la forme tronconique The positioning means 1 1, 12 are of the interlocking type of a male part in a female part, the interlocking being possible in a single direction in view of the frustoconical shape.
Les moyens 1 1 de positionnement situés au niveau de la petite base de la jupe sont des languettes 1 1A radiales qui viennent se loger dans les creux d'un créneau 1 1B de la petite base du radiateur et prendre appui au fond des créneaux du radiateur. Ces moyens forment des butés pour un arrêt en translation. The positioning means 1 1 located at the level of the small base of the skirt are tongues 1 1A radial which are housed in the recesses of a crenel 1 1B of the small base of the radiator and support the bottom of the crenel of the radiator . These means form stops for stopping in translation.
En ce qui concerne la grande base, le bord du radiateur présente des lamelles 12 A en forme de créneaux faisant saillis par rapport au plan de la grande base lesdites lamelles venant s'encastrer dans des empreintes 12B présentées dans l'épaisseur du bord de la jupe. La souplesse des lamelles 12A permet, par construction géométrique une application élastique des lamelles sur la face interne de la jupe. C'est à ce niveau que la source génère la chaleur. C'est donc à ce niveau là qu'il faut améliorer le contact entre les deux pièces pour un transfert plus rapide de calories du radiateur vers la jupe. As regards the large base, the edge of the radiator has slats 12 A in the form of crenellations projecting from the plane of the large base, said slats coming to fit in the imprints 12B presented in the thickness of the edge of the skirt. The flexibility of the lamellae 12A allows, by geometrical construction, an elastic application of the lamellae on the internal face of the skirt. It is at this level that the source generates the heat. It is therefore at this level that it is necessary to improve the contact between the two parts for a faster transfer of calories from the radiator to the skirt.
La position haute et basse des moyens de positionnement guide la contrainte d'assemblage. The high and low position of the positioning means guides the assembly constraint.
Cette jupe constituant un dissipateur supplémentaire au radiateur forme également un carter qui délimite une chambre coaxiale au radiateur. Cette chambre est reliée à l'extérieur par des lumières 10A, 10B arrangées pour créer une circulation d'air entre la chambre et l'extérieur. This skirt constituting an additional dissipator to the radiator also forms a casing which delimits a coaxial chamber to the radiator. This room is connected to the outside by lights 10A, 10B arranged to create a flow of air between the room and the outside.
Les lumières de la jupe sont réparties en deux groupes l'un 10A se localisant près d'une extrémité de la jupe et l'autre 10B près de l'autre extrémité en sorte de créer une circulation. The lights of the skirt are divided into two groups, one 10A locating near one end of the skirt and the other 10B near the other end so as to create a circulation.
Les lumières peuvent être parallèles aux bases ou inclinées. La circulation d'air produite par la chaleur et les lumières de la jupe est canalisée selon l'axe longitudinal de l'ampoule. The lights can be parallel to the bases or inclined. The circulation of air produced by the heat and the lights of the skirt is channeled along the longitudinal axis of the bulb.
Du fait que les bords des ailettes soient appliqués sur la face interne de la jupe, elles partitionnent la chambre entourant le radiateur et on a donc prévu des encoches 14 dans les ailettes du radiateur qui permettent une circulation transversale. Ces encoches sont agencées dans deux plans parallèles au plan de la petite base. Because the edges of the fins are applied to the inner face of the skirt, they partition the chamber surrounding the radiator and so there are provided notches 14 in the fins of the radiator which allow a transverse circulation. These notches are arranged in two planes parallel to the plane of the small base.
Les encoches proche de la petite base sont dans un plan qui coïncide avec celui contenant un groupe de lumières 10B de manière à limiter les effets visqueux de l'air et à permettre un effet pompage thermique (auto-ventilation). L'évacuation de la chaleur a pour objectif de maintenir la LED dans une plage de température de fonctionnement nominal de manière à obtenir son meilleur rendement et de protéger l'électronique de commande de la source et plus précisément éviter de dépasser la température critique de fonctionnement de certains composants sensibles. Cette électronique est logée dans un support 2 tubulaire dont le matériau a été choisi pour être un isolant électrique et thermique. Ce support tubulaire est logé dans un logement 15 axial du radiateur 5. The notches close to the small base are in a plane which coincides with that containing a group of lights 10B so as to limit the viscous effects of the air and to allow a thermal pumping effect (self-ventilation). The objective of the heat dissipation is to maintain the LED in a nominal operating temperature range so as to obtain the best efficiency and to protect the control electronics from the source and more precisely to avoid exceeding the critical operating temperature. certain sensitive components. This electronics is housed in a tubular support 2 whose material has been chosen to be an electrical and thermal insulator. This tubular support is housed in an axial housing of the radiator 5.
L'énergie dissipée par le radiateur 5 en direction du support 2 tubulaire chauffe donc l'intérieur du tube. The energy dissipated by the radiator 5 towards the tubular support 2 thus heats the inside of the tube.
Avantageusement, la face 2A externe du support tubulaire 2 présente des moyens 17 de centrage maintenant la dite face latérale externe du support tubulaire écartée de la face 15 A interne du logement 15 du radiateur pour définir une chambre 16 concentrique isolante. La face extrême du support tubulaire est écartée du fond de logement au moyen des plots 17 qui sont également prévus sur cette face extrême. Advantageously, the outer face 2A of the tubular support 2 has centering means 17 holding said outer lateral face of the tubular support spaced from the inner face 15 of the housing 15 of the radiator to define a concentric insulating chamber 16. The end face of the tubular support is spaced from the housing bottom by means of the pads 17 which are also provided on this end face.
Ces moyens de centrage sont des plots 17 et/ou des nervures 17 avec des surfaces de contact réduites. Pour ce faire les plots sont coniques ou les nervures ont une section triangulaire. On voit ici une version à nervures 17 qui coulissent dans des rainures 18 pour une immobilisation en rotation. These centering means are studs 17 and / or ribs 17 with reduced contact surfaces. To do this the studs are conical or the ribs have a triangular section. Here we see a version with ribs 17 which slide in grooves 18 for immobilization in rotation.
On parvient avec ces moyens à limiter l'influence de la température du radiateur sur le logement de l'électronique. With these means it is possible to limit the influence of the temperature of the radiator on the housing of the electronics.
Pour ce faire on dissipe plus de calories non seulement par augmentation de la surface d'échange mais en créant un pompage thermique dans l'espace aménagé entre le radiateur et la jupe formant carter, ce pompage étant produit par la présence des lumières. To do this we dissipate more calories not only by increasing the exchange surface but by creating a thermal pumping in space arranged between the radiator and the skirt forming a casing, this pumping being produced by the presence of the lights.
La jupe est en matériau bon conducteur de la chaleur tel l'aluminium, le cuivre, la céramique etc en opposition avec les matériaux dit plastiques issus du pétrole. L'épaisseur de cette jupe est faible pour améliorer la conduction. The skirt is made of a good heat conducting material such as aluminum, copper, ceramics, etc. in opposition to so-called plastic materials derived from petroleum. The thickness of this skirt is low to improve the conduction.

Claims

REVENDICATIONS
1. Ampoule à diode électroluminescente comprenant une source de lumière, un support 2 tubulaire logeant une électronique de commande de la source de lumière, un radiateur 5 concentrique au support tubulaire, cette ampoule comprenant un jupe 9 en matériau bon conducteur de la chaleur montée concentrique au radiateur pour former un dissipateur supplémentaire et cette jupe présente des lumières 10A, 10B pour la circulation de l'air ,cette ampoule étant caractérisée en ce que le radiateur présente des ailettes présentant des encoches 14 agencées selon deux plans parallèles à la petite base pour une circulation transversale de l'air et les encoches proches de la petite base sont dans un plan qui coïncide avec celui contenant un groupe de lumières de cette jupe . 1. Light-emitting diode bulb comprising a light source, a tubular support 2 housing a control electronics of the light source, a radiator 5 concentric with the tubular support, this bulb comprising a skirt 9 made of a material conductively conducive to concentric heat to the radiator to form an additional dissipator and this skirt has lights 10A, 10B for the circulation of air, this bulb being characterized in that the radiator has fins having notches 14 arranged in two planes parallel to the small base for a transverse circulation of the air and the notches close to the small base are in a plane which coincides with that containing a group of lights of this skirt.
2. Ampoule à diode électroluminescente selon la revendication 1 caractérisé la jupe est en contact avec pression sur le radiateur pour un transfert de calories par conduction . 2. Light-emitting diode bulb according to claim 1 characterized the skirt is in contact with pressure on the radiator for conductive heat transfer.
3. Ampoule à diode électroluminescente selon la revendication 2 caractérisé en ce que le bord des ailettes est en contact avec la face interne de la jupe pour un transfert par conduction. 3. light-emitting diode bulb according to claim 2 characterized in that the edge of the fins is in contact with the inner face of the skirt for transfer by conduction.
4. Ampoule à diode électroluminescente selon la revendication 1 caractérisée en ce que l'assemblage de la jupe sur le radiateur est fait en force par le dimensionnement des dites jupe et radiateur. 4. light-emitting diode bulb according to claim 1 characterized in that the assembly of the skirt on the radiator is made in force by the design of said skirt and radiator.
5. Ampoule à diode électroluminescente selon la revendication 1 ou 2 caractérisée en ce que la jupe comprend à ses deux extrémités des moyens 1 1, 12 de positionnement sur les extrémités du radiateur. 5. light-emitting diode bulb according to claim 1 or 2 characterized in that the skirt comprises at its two ends means 1 1, 12 of positioning on the ends of the radiator.
6. Ampoule à diode électroluminescente selon la revendication 4 caractérisée en ce que les moyens de positionnement comprennent des languettes coopérant avec empreintes. 6. light-emitting diode bulb according to claim 4 characterized in that the positioning means comprise tabs cooperating with fingerprints.
7. Ampoule à diode électroluminescente selon la revendication 6 caractérisée en ce que, par construction la languette s'appuie élastiquement sur l'empreinte. 7. light-emitting diode bulb according to claim 6 characterized in that, by construction, the tongue is resiliently supported on the cavity.
8. Ampoule à diode électroluminescente selon la revendication 1 caractérisée en ce que les lumières de la jupe sont réparties en deux groupes l'un 10A se localisant près d'une extrémité de la jupe et l'autre 10B près de l'autre extrémité en sorte de créer une circulation d'air. 8. Light-emitting diode bulb according to claim 1 characterized in that the lights of the skirt are divided into two groups one 10A located near one end of the skirt and the other 10B near the other end. kind of create a circulation of air.
9. Ampoule à diode électroluminescente selon la revendication 1 caractérisée en ce que le radiateur comprend un logement recevant un support tubulaire logeant l'électronique et la face externe du support tubulaire présente des moyens 17 de centrage maintenant la face extrême du support écartée du fond du logement ainsi que la face latérale du support tubulaire écartée de la face interne dudit logement du radiateur pour définir une chambre 16 isolante. 9. light-emitting diode bulb according to claim 1 characterized in that the radiator comprises a housing receiving a tubular support housing the electronics and the outer face of the tubular support has centering means 17 holding the end face of the support away from the bottom of the housing and the side face of the tubular support spaced from the inner face of said radiator housing to define an insulating chamber 16.
10. Ampoule à diode électroluminescente selon la revendication 9 caractérisé en ce que les moyens de centrage sont des plots et/ou des nervures 17 avec des surfaces de contact réduites. 10. light-emitting diode bulb according to claim 9 characterized in that the centering means are pads and / or ribs 17 with reduced contact surfaces.
PCT/FR2012/000012 2011-01-13 2012-01-10 Diode bulb having a heat sink WO2012095584A2 (en)

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FR1100113A FR2970547A1 (en) 2011-01-13 2011-01-13 DIODE BULB WITH DISSIPATOR
FR11/00113 2011-01-13

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WO2012095584A3 WO2012095584A3 (en) 2012-11-15

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