WO2010061087A1 - Power led diode light source with fluid cooling system - Google Patents

Power led diode light source with fluid cooling system Download PDF

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Publication number
WO2010061087A1
WO2010061087A1 PCT/FR2009/052101 FR2009052101W WO2010061087A1 WO 2010061087 A1 WO2010061087 A1 WO 2010061087A1 FR 2009052101 W FR2009052101 W FR 2009052101W WO 2010061087 A1 WO2010061087 A1 WO 2010061087A1
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WO
WIPO (PCT)
Prior art keywords
light source
envelope
support
led diode
primary
Prior art date
Application number
PCT/FR2009/052101
Other languages
French (fr)
Inventor
Francis David
Original Assignee
Fd Developpement
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 Fd Developpement filed Critical Fd Developpement
Publication of WO2010061087A1 publication Critical patent/WO2010061087A1/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
    • F21V15/00—Protecting lighting devices from damage
    • F21V15/01—Housings, e.g. material or assembling of housing parts
    • 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
    • F21V29/56—Cooling arrangements using liquid coolants
    • F21V29/58—Cooling arrangements using liquid coolants characterised by the coolants
    • 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
    • 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 power LED diode light source equipped with a cooling fluid cooling system, including a diode LED light source of power because the operating temperature determines its life.
  • a power LED diode light source equipped with a cooling fluid cooling system, including a diode LED light source of power because the operating temperature determines its life.
  • STATE OF THE ART Power LED diode light sources already exist, equipped with a cooling fluid cooling system, for example in the document US Pat. No. 5,890,794 (April 3, 1996) or DE 102 60 432. Al (December 21, 2002).
  • the present invention aims to develop a power LED diode light source to ensure the expected life of such a diode operating in low temperature conditions, that is to say with a good evacuation of the heat released by the diode without also reducing this lifetime by other factors, such as the physicochemical damage of the diode.
  • the invention relates to a diode light source of power of the type defined above characterized in that it comprises - a power LED diode provided with a thermally conductive support, - a primary envelope, thermally conductive, connected to the support by a thermal conduction link, - A thermoconductive secondary envelope, connected to the primary envelope and forming therewith, an enclosure receiving a coolant, the Led diode being external to the enclosure.
  • the power LED diode not being in contact with the coolant but isolated from it, it not only benefits from excellent cooling by its thermally conductive support associated with the thermally conductive primary envelope which evacuates the heat towards the liquid cooling of the enclosure but also thanks to its confinement which isolates it from the outside atmosphere.
  • the only link of the diode is a thermal link of the primary shell, conductive, sealed, in contact with the coolant, particularly if according to another advantageous characteristic, the Led diode is enclosed in a hermetic enclosure and that it is filled with a neutral gas eliminating oxygen to eliminate any risk of alteration of the Led diode.
  • Cooling of the power diode is first heat conduction with the support and the primary envelope constituting a first heat sink providing a large exchange surface with the liquid or the cooling fluid contained in the enclosure.
  • the dissipation of the heat of the liquid to the outside is done by the different modes of heat exchange, namely conduction, radiation and convection.
  • this chamber receives a drying agent to absorb any residual moisture that may be in the enclosure containing the Led diode or that could enter under the effect of temperature variations and unavoidable micro leaks.
  • the light source according to the invention can be used either as a source constituting a lamp with a directed light flux, such as that of an apparent or recessed spot and in particular for architectural lighting applications.
  • the light source can also be used as a lighting lamp, emitting a diffuse light; it can be combined with luminaires, especially luminaires provided with diffusers such as opal surfaces in the form of a globe, wall sconces, portholes or lamps of this type.
  • the enclosure is provided with a stopper and a compensation zone of the expansion of the coolant to prevent pressure build-up inside the enclosure.
  • the primary envelope is in the form of a pot and the support of the LED diode is fixed against the bottom of the envelope.
  • the Led diode is fixed inside the primary envelope and the entrance of the envelope carries an optic.
  • Closing the enclosure delimited by the primary envelope and the optics can form a sealed enclosure as indicated above.
  • the Led diode is fixed on the outside, at the bottom of the primary envelope and forms a dry chamber behind the Led diode.
  • This assembly which is relatively clear towards the front and is suitable for a non-directional light source, diffusing in a volume corresponding to a half space delimited globally by the support plane of the Led diode.
  • the support is a metal plate, one side of which receives the Led diode in thermally conductive contact and the other face is provided with a tip used for fixing against the bottom of the main envelope and allowing the passage of LED power supply cables.
  • This embodiment of the support is particularly advantageous because it is suitable for a multiplicity of embodiments of the enclosure receiving the cooling liquid.
  • This support is a particularly simple embodiment, especially as a piece of brass or an alloy as is customary for a large number of components used in the manufacture of lamps.
  • the metal plate is provided with a radial slot opening into the sleeve for the passage of the power supply cables of the LED diode installed on the other side of the metal plate.
  • the Led diode and its support are housed in the primary envelope which receives a reflector and whose opening is closed by an optic.
  • the LED and its support are fixed against the outer face of the bottom of the envelope primary which continues to the rear of the support by a cylindrical surface delimiting with the secondary envelope, an enclosure located at the rear relative to the plane of the support carrying the Led diode.
  • the inner volume of the primary envelope inside the cylindrical surface constitutes a dry chamber containing, if necessary, a drying agent.
  • the lamp made with a light source according to the invention can for example be embedded in a strip or a false ceiling or other wall surface or furniture through springs or clips carried by the secondary envelope.
  • FIG. 2 is a view in axial section of a second embodiment of a Led diode light source
  • FIG. 3 shows in section the central module of the light source of FIG. 1,
  • FIG. 4 shows, in its parts A-C, the support of the Led diode, namely:
  • FIG. 4A is an exploded view of the support and the diode
  • FIG. 4B is a view from above of the support
  • FIG. 4C is an axial section of the support
  • FIG. 5 shows, in parts A-E, different elements of the central module, namely:
  • FIG. 5A is a sectional view of the primary envelope
  • FIG. 5B is a view in axial section of the primary envelope provided with the diode and its support
  • FIG. 5C is an axial sectional view of the reflector
  • FIG. 5D is an axial sectional view of two variants of the optics
  • FIG. 5E is an axial section of the support fixing sleeve
  • FIG. 6A is an axial section of the central module and the secondary envelope according to two embodiments
  • FIG. 6B is an axial section of the plug and the cover of the subassembly shown in FIG. 6A,
  • FIG. 7 is a partial axial section of another light source variant. Description of Embodiments of the Invention
  • a first embodiment of a power LED diode light source consists of a central module 100 comprising a primary casing 1 10 in the form of a cylinder 1 13 whose bottom 1 1 1 pierced with an orifice January 12, receiving a Led diode 120 carried by a support 130 itself fixed to the bottom 1 1 1 by a threaded sleeve 140 forming a nut.
  • the front orifice 1 14 of the cylinder 1 13 of the primary envelope 1 10 is closed by an optical 150, 150A ensuring the formation of the light beam emitted by the Led diode 120.
  • a reflector 155 is interposed between the diode 120 and the optics 150, 150A for channeling the luminous flux towards the optics.
  • This central module 100 is combined with a secondary envelope or outer envelope 200, 200A shown in its two variants to the left and right of the axis line XX.
  • the secondary casing 200, 200A defines with the primary casing 100, a chamber 250 receiving a cooling liquid.
  • This enclosure 250 is closed by a cap 260 applied on the top and tightened by a cover 270 screwed on the secondary casing 200, 200A.
  • fastening springs 280 provided externally on the secondary casing 200, 200A and a hubcap flange 285, 285A with two slightly different shapes to attach to the front of the secondary casing 200, 200A.
  • FIG. 2 shows a second embodiment of a LED diode light source according to the invention.
  • This light source consists of a diode 120 carried by a support 130 fixed to the bottom 41 1 of a primary casing 310 also in the form of a cylinder 313.
  • the diode 120 is fixed on the outer face of the bottom 31 1 of the envelope 310 and not inside thereof.
  • the primary envelope 310 is combined with a secondary envelope 400 (outer envelope) defining an enclosure 250 receiving a coolant.
  • the optical 350 is constituted by a rounded cap, for example hemispherical, transparent or translucent ensuring the diffusion of the light beam emitted by the Led diode 120.
  • the interior volume delimited by the primary envelope 310 constitutes a dry chamber 451 closed by a plug 460, 460A.
  • This dry chamber 451 receives, where appropriate, a desiccant 452 schematized by flakes to maintain the atmosphere of this chamber 451 perfectly dry.
  • the first embodiment of the light source ( Figure 1) is primarily intended to be embedded in a surface provided with an orifice to form a spot. It is a lamp emitting an apparent or recessed spot type directed flux for architectural lighting applications.
  • the second embodiment ( Figure 2) is primarily intended to be installed in a lamp holder in the position of the orientation of Figure 2 or in a position returned to 180 ° or, more generally, any orientation. In this second case, it is a lighting lamp with a general function that emits a diffuse light; this lamp can be used in luminaires with opal diffusers such as globes, wall lights or others.
  • the diode 120 is physically isolated from the external environment and direct contact with the coolant.
  • the more detailed structure of the first embodiment of the light source will be described hereinafter with reference to FIGS. 3-6B and, for its variant, with reference to FIG. 100 consists of the primary envelope 1 10 in the form of pot or with a cylinder surface 1 13, provided with a bottom 1 1 1 through which a hole 1 12 passes.
  • This primary enclosure 1 10 is made of a thermally conductive material, for example for example a metal such as a light metal such as aluminum, shaped by a conventional forming process, for example cast aluminum or aluminum shaped by a method of spinning.
  • the LED 120 is fixed with its plate 121 on a support 130 such as that shown in Figures 4A-4C. This support 130 is itself fixed against the bottom 1 1 1 to the inside of the primary casing 1 10 through the orifice 1 12 to be blocked with the interposition of a seal 141, by a nut-shaped sleeve 140.
  • a reflector 155 of substantially conical shape capping the light output ball 122 of the LED 120 to direct the luminous flux against the rear face 151 of the lens 150, 150A lens, fixed in the opening 1 14 of the primary casing 1 10.
  • This optic has a lens shape extended by a skirt 152 for its attachment in the primary casing 1 10.
  • the lens of the optical 150 ends with an edge 153 at the contour of the primary casing 1 10 while in the right part, the optic 150A overlaps the edge of the primary casing 1 10 by a back 153A.
  • FIGS. 4A-4C show in more detail the shape of the support 130 of the diode 120.
  • This support 130 consists of a disc-shaped part 131, provided with a radial cut-out 132 and ending, at its rear face, with a threaded end 133.
  • the disc-shaped part 131 is pierced by two orifices 134 for fixing by rivets of the plate 121 carrying the Led diode 120.
  • This attachment allows the rear face of the wafer 121 of the diode 120 to remain closely applied against the face of the support 130 even if this connection is advantageously completed by a layer of heat-conductive adhesive.
  • the threaded end piece 133 serves to fix the support 130 previously provided with the plate 121 of the LED 120 against the bottom 1 1 1 of the primary casing 1 10 for screwing and interposition of a seal 141. It is possible alternatively, sealing the passage of the two supply conductors 123, 124 of the diode 120 through a gage 142 blocked by a screw 143 forming a gland, screwed into the thread of the threaded sleeve 140.
  • FIG. 5A shows, in axial section, the circular cylindrical shape 1 13 of the primary casing 1 10 corresponding to an exemplary embodiment.
  • This primary casing 1 10 is made of a thermoconductive material such as aluminum.
  • the envelope 1 receives the subassembly constituted by the diode 120 fixed to its support 130, the endpiece 133 of which is engaged in the opening 1 12 of the bottom 1 1 1 of the envelope
  • the threaded sleeve 140 is not yet screwed onto the threaded end 133.
  • FIG. 5C shows the conical shape of the reflector 155 which may be straight or curved as shown in broken lines.
  • the reflector is made of mirrored aluminum or metallized plastic with, preferably, a washer forming a seal, interposed between the edge of the reflector and the Led diode.
  • This conical reflector 155 is placed simply in the primary casing 1 10 being retained by the establishment of the optical 150, 150A shown in section in Figure 5D for its two variants on either side of the XX axis.
  • the lens of the optic is preferably a piece of transparent plastic material such as molded polycarbonate and its attachment to the edge of the opening of the primary envelope is preferably made by gluing.
  • FIG. 5E shows the nut 140 in the form of a sleeve serving both to block the support 130 with the LED against the bottom 1 1 1 of the primary envelope 1 10 and to receive, if necessary, the tow 142 and the gland 143 as described, and also the plug 260.
  • the support 130 of the Led diode is made of a thermally conductive material, for example a piece of brass or an alloy, easy to machine.
  • FIG. 6A shows the assembly of the central module 100 in the secondary envelope 200, 200A.
  • This secondary envelope 200, 200A is a piece of revolution relative to the axis XX.
  • the secondary envelope 200 is composed of a circular ring 210 provided with an inner circular edge 220 of small height and of an outer circular edge 230 high, partly completed 231. Externally, the annular ring 210 extends (21 1) beyond the edge 230.
  • the inner edge 220 of low height is a circular ring in which engages the front end of the cylinder 1 13 of the central module 100, packed with its optical 150, 150A.
  • a seal 221, for example a silicone bead, may be provided as indicated.
  • the primary casing 1 10 and the secondary casing 200 delimit between them the enclosure 250 receiving the cooling liquid.
  • the secondary casing 200 is itself preferably made of a thermally conductive material.
  • the secondary envelope 200A has a slightly different shape so as to absorb the return 153A of the optic 150A also modified in this variant and, if necessary, to cover as shown , the front of the optics 150A.
  • the secondary envelope 200A also comprises a circular ring 210A with a low edge 220A for receiving the central module 100 with its optic 150A overflowing and an outer edge 230A of greater height, similar to that of the embodiment of the left part, with in the upper part, a thread 23 IA.
  • the enclosure 250 of the subassembly thus produced according to FIG. 6A receives the coolant which may be more or less viscous.
  • the enclosure 250 closes with the aid of the cap 260 (FIG. 6B) covering the top of the enclosure 250 while being engaged on the threaded sleeve 140 of the central module 100.
  • the plug 260 has a disc shape with a central ring 261 forming a sealing lip to come around the sleeve 140 of the central module 100 and a deformable ring 262, intended to serve as a deformable volume for the expansion of the cooling liquid.
  • the peripheral edge 263 of the cap 260 rests on the edge of the secondary envelope 200, 200A.
  • This cover 270 which is a part of revolution, comprises a peripheral skirt 271 with a thread 272 corresponding to that of the secondary casing 200, 200A to be screwed on this thread with interposition of the plug 260.
  • the upper part of the lid is provided with a hole 273 for the passage of the power cables 123, 124 of the Led diode 120.
  • the filling of the enclosure 250 with coolant is done before the introduction of the cap 260.
  • Figure 7 shows a plug variant 260A for the first embodiment, the other elements being identical to those already described.
  • This plug 260A has an annular ring 262 A with a V-shaped section and comprises two filling tubes 265A, 266A.
  • the plug 260A is put in place in the secondary casing 200, 200A before the filling or the complete filling of the enclosure 250 with coolant; the filling supplement is made using the sleeves 265A, 266A, one of which serves for the entry of the liquid and the other for the evacuation of air; they are represented in folded position by the lid; this folding ensures the tight closure.
  • the underside of the cover 270 has a rib 274 to assist the bending of the tubes 265A, 266A. When the cover 270 is removed, the two tubes 265A, 266A stand up and allow the entry of the liquid and the exit of the air.
  • the embodiment of Figure 2 has a structure which in principle is identical to that of the first variant, but differs in its form. To facilitate and simplify the description, elements identical or similar to those of the first embodiment have the same references increased by 200. The description of all these elements will not be systematically repeated, so as to emphasize only the differences between the second embodiment and the first. The elements strictly identical to those of the first embodiment carry unchanged references.
  • the support 130 of the Led diode 120 is fixed against the bottom 31 1 of the primary casing 310 also in the form of a cylinder 313 but against the outer face of this bottom. Fixing is also done by the threaded end 133 of the support 130 which receives a nut 340.
  • the other elements of the diode and its attachment to the support 130 are identical to those of the first embodiment.
  • the supply cables 123, 124 of the diode 120 pass inside the threaded end 133 of the support to pass through the dry chamber 451 and the plug 453 closing the latter to exit at the rear or on the top of the all.
  • the primary casing 310 extends beyond the bottom 31 1 by a flange 315 serving for the purpose of in place of the dome or cap 350 of light scattering. This cap 350 is fixed to the primary casing 310 by a sealing bead 351.
  • the primary casing 310 also has a peripheral ring 316 against which the secondary casing 400 is fixed by means of a bonded connection 401 shown schematically.
  • the enclosure 450 for the cooling liquid delimited by the cylindrical wall 313 "rear" of the primary casing 310 and the secondary envelope 400 is thus on the back side of the light source.
  • the secondary casing 400 is shaped and arranged appropriately to form the annular enclosure 450 receiving the coolant.
  • the primary envelope 310 and the secondary envelope 400 are thermoconductive.
  • the enclosure 450 is closed by a plug 460, 460A which, in its left variant 460, comprises lips 461 to complete the sealing of the enclosure 450. These lips are not provided in the variant 460A of the right part of Figure 2.
  • FIG. 2 schematically shows a dotted deformation of the plug 460, 460A which represents the possible expansion of the volume of the liquid in the enclosure 450 under the effect of a rise in temperature.
  • the plug 460, 460A is pressed against the top of the primary shell 310 and the secondary shell 400 by a suitable cover 470 having corresponding bearing surfaces.
  • the cover 470 consists of a central tube 473 in a position homologous to that of the edge of the primary envelope 310.
  • the cover 470 is continued by a surface 474 which is plane, external, in the shape of a circular ring. then, a fallout 475 forming a bearing surface to come on the plug 460, 460A.
  • the enclosure is filled with two holes 405, 406, one of which allows the entry of coolant and the other, the evacuation of air.
  • the filling is in a reversed position compared to that shown in Figure 2.
  • the coolant for cooling is for example a liquid of vegetable or mineral origin. It can be oil or paraffin, a synthetic resin having a high power of contact with the walls, that is to say excellent wettability in addition to the thermoconducting qualities.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

The invention relates to a power LED diode light source provided with a cooling system using a coolant. The light source includes a power LED diode (120) with a heat-conducting holder (130); a heat-conducting primary shell (110) connected to the holder (130) by a heat-conducting link; a heat-conducting secondary shell (200, 200A) connected to the primary shell (110) and defining with the latter a housing (250) for receiving the coolant, the LED diode (120) being located outside the housing (250).

Description

« Source lumineuse à diode Led de puissance équipée d'un système de refroidissement par fluide » Domaine de l'invention BACKGROUND OF THE INVENTION Power LED diode light source equipped with a fluid cooling system
La présente invention concerne une source lumineuse à diode Led de puissance équipée d'un système de refroidissement par fluide de refroidissement, notamment une source lumineuse à diode Led de puissance car la température de fonctionnement conditionne sa durée de vie. Etat de la technique II existe déjà des sources lumineuses à diode Led de puissance, équipées d'un système de refroidissement par fluide de refroidissement, par exemple dans le document US 5 890 794 (3 avril 1996) ou encore le document DE 102 60 432 Al (21 décembre 2002).The present invention relates to a power LED diode light source equipped with a cooling fluid cooling system, including a diode LED light source of power because the operating temperature determines its life. STATE OF THE ART Power LED diode light sources already exist, equipped with a cooling fluid cooling system, for example in the document US Pat. No. 5,890,794 (April 3, 1996) or DE 102 60 432. Al (December 21, 2002).
Ces documents, parmi de nombreux autres, décrivent des sources lumineuses à diode Led de puissance placées dans une cavité contenant un liquide de refroidissement de façon à réduire la température de la diode et augmenter sa durée de vie. Mais ces systèmes de sources lumineuses n'ont pu se développer ni s'imposer car malgré le refroidissement de la diode, leur fiabilité n'est pas assurée. La cause principale est celle du contact du liquide de refroidissement avec la diode provoquant des altérations irréversibles de la diode par oxydation et par conséquent de manière très forte, la durée d'espérance de vie d'une telle source lumineuse. But de l'invention La présente invention a pour but de développer une source lumineuse à diode Led de puissance permettant d'assurer la durée de vie prévisible d'une telle diode fonctionnant dans des conditions de température basse, c'est-à-dire avec une bonne évacuation de la chaleur dégagée par la diode sans par ailleurs réduire cette durée de vie par d'autres fac- teurs, tels que les dommages physicochimiques de la diode. Exposé et avantages de l'inventionThese documents, among many others, describe LED light sources of power placed in a cavity containing a coolant so as to reduce the temperature of the diode and increase its life. But these light source systems could not develop or impose because despite the cooling of the diode, their reliability is not assured. The main cause is that of the contact of the coolant with the diode causing irreversible alterations of the diode by oxidation and therefore very strongly, the life expectancy of such a light source. OBJECT OF THE INVENTION The present invention aims to develop a power LED diode light source to ensure the expected life of such a diode operating in low temperature conditions, that is to say with a good evacuation of the heat released by the diode without also reducing this lifetime by other factors, such as the physicochemical damage of the diode. Description and advantages of the invention
A cet effet, l'invention concerne une source lumineuse à diode Led de puissance du type défini ci-dessus caractérisé en ce qu'elle comprend - une diode Led de puissance munie d'un support thermoconducteur, - une enveloppe primaire, thermoconductrice, reliée au support par une liaison de conduction thermique, - une enveloppe secondaire thermoconductrice, reliée à l'enveloppe primaire et formant avec celle-ci, une enceinte recevant un liquide de refroidissement, la diode Led étant extérieure à l'enceinte. La diode Led de puissance n'étant pas en contact avec le liquide de refroidissement mais isolée de celui-ci, elle bénéficie non seulement d'un excellent refroidissement par son support thermoconducteur associé à l'enveloppe primaire thermoconductrice qui évacue la chaleur vers le liquide de refroidissement de l'enceinte mais aussi grâce à son confinement qui l'isole de l'ambiance extérieure. Le seul lien de la diode est un lien thermique de l'enveloppe primaire, conductrice, étanche, en contact avec le liquide de refroidissement en particulier si suivant une autre caractéristique avantageuse, la diode Led est enfermée dans une enceinte hermétique et que celle-ci est remplie d'un gaz neutre éliminant l'oxygène pour supprimer tout risque d'altération de la diode Led. Le refroidissement de la diode de puissance se fait d'abord par conduction thermique avec le support et l'enveloppe primaire constituant un premier puits de chaleur offrant une grande surface d'échange avec le liquide ou le fluide de refroidissement contenu dans l'enceinte. La dissipation de la chaleur du liquide vers l'extérieur se fait par les différents modes d'échange thermique, à savoir la conduction, le rayonnement et la convec- tion.For this purpose, the invention relates to a diode light source of power of the type defined above characterized in that it comprises - a power LED diode provided with a thermally conductive support, - a primary envelope, thermally conductive, connected to the support by a thermal conduction link, - A thermoconductive secondary envelope, connected to the primary envelope and forming therewith, an enclosure receiving a coolant, the Led diode being external to the enclosure. The power LED diode not being in contact with the coolant but isolated from it, it not only benefits from excellent cooling by its thermally conductive support associated with the thermally conductive primary envelope which evacuates the heat towards the liquid cooling of the enclosure but also thanks to its confinement which isolates it from the outside atmosphere. The only link of the diode is a thermal link of the primary shell, conductive, sealed, in contact with the coolant, particularly if according to another advantageous characteristic, the Led diode is enclosed in a hermetic enclosure and that it is filled with a neutral gas eliminating oxygen to eliminate any risk of alteration of the Led diode. Cooling of the power diode is first heat conduction with the support and the primary envelope constituting a first heat sink providing a large exchange surface with the liquid or the cooling fluid contained in the enclosure. The dissipation of the heat of the liquid to the outside is done by the different modes of heat exchange, namely conduction, radiation and convection.
Suivant une autre caractéristique avantageuse, cette enceinte reçoit un agent dessiccateur pour absorber l'éventuelle humidité résiduelle qui pourrait se trouver dans l'enceinte contenant la diode Led ou qui pourrait y pénétrer sous l'effet des variations de température et des micro fuites inévitables.According to another advantageous characteristic, this chamber receives a drying agent to absorb any residual moisture that may be in the enclosure containing the Led diode or that could enter under the effect of temperature variations and unavoidable micro leaks.
La source lumineuse selon l'invention peut être utilisée soit comme source constituant une lampe avec un flux lumineux dirigé, comme celui d'un spot apparent ou encastré et notamment pour des applications d'éclairage architectural. La source lumineuse peut également servir de lampe d'éclairage, émettant une lumière diffuse ; elle peut être combinée à des luminaires, notamment des luminaires munis de diffuseurs tels que des surfaces opalines en forme de globe, des appliques, des hublots ou lampes de ce type.The light source according to the invention can be used either as a source constituting a lamp with a directed light flux, such as that of an apparent or recessed spot and in particular for architectural lighting applications. The light source can also be used as a lighting lamp, emitting a diffuse light; it can be combined with luminaires, especially luminaires provided with diffusers such as opal surfaces in the form of a globe, wall sconces, portholes or lamps of this type.
Suivant une caractéristique avantageuse de l'invention, l'enceinte est munie d'un bouchon et d'une zone de compensation de la dilatation du liquide de refroidissement pour éviter l'augmentation de pression à l'intérieur de l'enceinte.According to an advantageous characteristic of the invention, the enclosure is provided with a stopper and a compensation zone of the expansion of the coolant to prevent pressure build-up inside the enclosure.
Selon une autre caractéristique, l'enveloppe primaire est en forme de pot et le support de la diode Led est fixé contre le fond de l'enveloppe. Dans ce cas, la diode Led est fixée à l'intérieur de l'enveloppe primaire et l'entrée de l'enveloppe porte une optique.According to another characteristic, the primary envelope is in the form of a pot and the support of the LED diode is fixed against the bottom of the envelope. In this case, the Led diode is fixed inside the primary envelope and the entrance of the envelope carries an optic.
La fermeture de l'enceinte délimitée par l'enveloppe primaire et l'optique peut former une enceinte étanche comme indiqué ci-dessus.Closing the enclosure delimited by the primary envelope and the optics can form a sealed enclosure as indicated above.
Suivant une autre caractéristique, la diode Led est fixée à l'extérieur, au fond de l'enveloppe primaire et forme une chambre sèche derrière la diode Led. Ce montage qui est relativement dégagé vers l'avant et convient pour une source lumineuse non directionnelle, diffusant dans un volume correspondant à un demi espace délimité globalement par le plan du support de la diode Led. Suivant une autre caractéristique avantageuse, le support est une plaque métallique dont une face reçoit la diode Led en contact thermoconducteur et l'autre face est munie d'un embout servant à la fixation contre le fond de l'enveloppe principale et permettant le passage des câbles d'alimentation de la diode Led. Cette réalisation du support est particulièrement avantageuse car elle convient à une multiplicité de formes de réalisation de l'enceinte recevant le liquide de refroidissement. Ce support est d'une réalisation particulièrement simple, notamment comme pièce en laiton ou en un alliage comme cela est habituel pour un grand nombre de compo- sants utilisés dans la fabrication de lampes.According to another characteristic, the Led diode is fixed on the outside, at the bottom of the primary envelope and forms a dry chamber behind the Led diode. This assembly which is relatively clear towards the front and is suitable for a non-directional light source, diffusing in a volume corresponding to a half space delimited globally by the support plane of the Led diode. According to another advantageous characteristic, the support is a metal plate, one side of which receives the Led diode in thermally conductive contact and the other face is provided with a tip used for fixing against the bottom of the main envelope and allowing the passage of LED power supply cables. This embodiment of the support is particularly advantageous because it is suitable for a multiplicity of embodiments of the enclosure receiving the cooling liquid. This support is a particularly simple embodiment, especially as a piece of brass or an alloy as is customary for a large number of components used in the manufacture of lamps.
Suivant une autre caractéristique, la plaque métallique est munie d'une fente radiale débouchant dans le manchon pour le passage des câbles d'alimentation électrique de la diode Led installée sur l'autre face de la plaque métallique. Cette forme de réalisation très compacte permet la sortie des câbles d'alimentation électrique de la diode d'une manière étanche, notamment si le passage au-delà de l'embout, dans le manchon fileté vissé sur l'embout, reçoit une étoupe comprimée par un presse-étoupe.According to another feature, the metal plate is provided with a radial slot opening into the sleeve for the passage of the power supply cables of the LED diode installed on the other side of the metal plate. This very compact embodiment allows the output of the power supply cables of the diode in a sealed manner, especially if the passage beyond the endpiece, in the threaded sleeve screwed on the endpiece, receives a compressed tow through a cable gland.
Suivant une autre caractéristique avantageuse, la diode Led et son support sont logés dans l'enveloppe primaire qui reçoit un réflecteur et dont l'ouverture est fermée par une optique.According to another advantageous characteristic, the Led diode and its support are housed in the primary envelope which receives a reflector and whose opening is closed by an optic.
Suivant une autre caractéristique alternative, la diode Led et son support sont fixés contre la face extérieure du fond de l'enveloppe primaire qui se poursuit vers l'arrière du support par une surface cylindrique délimitant avec l'enveloppe secondaire, une enceinte située à l'arrière par rapport au plan du support portant la diode Led.According to another alternative characteristic, the LED and its support are fixed against the outer face of the bottom of the envelope primary which continues to the rear of the support by a cylindrical surface delimiting with the secondary envelope, an enclosure located at the rear relative to the plane of the support carrying the Led diode.
Enfin, le volume intérieur de l'enveloppe primaire à l'intérieur de la surface cylindrique constitue une chambre sèche contenant, le cas échéant, un agent dessiccateur.Finally, the inner volume of the primary envelope inside the cylindrical surface constitutes a dry chamber containing, if necessary, a drying agent.
La lampe réalisée avec une source lumineuse selon l'invention peut par exemple s'encastrer dans un bandeau ou un faux- plafond ou autre surface de paroi ou de meubles grâce à des ressorts ou clips portés par l'enveloppe secondaire. DessinsThe lamp made with a light source according to the invention can for example be embedded in a strip or a false ceiling or other wall surface or furniture through springs or clips carried by the secondary envelope. drawings
La présente invention sera décrite de manière plus détaillée de modes de réalisation représentés schématiquement dans les dessins annexés dans lesquels : - la figure 1 est une vue en coupe axiale d'un premier mode de réalisation d'une source lumineuse à diode Led,The present invention will be described in more detail of embodiments shown schematically in the accompanying drawings in which: - Figure 1 is an axial sectional view of a first embodiment of a LED light source,
- la figure 2 est une vue en coupe axiale d'un second mode de réalisation d'une source lumineuse à diode Led,FIG. 2 is a view in axial section of a second embodiment of a Led diode light source,
- la figure 3 montre en coupe le module central de la source lumineuse de la figure 1 ,FIG. 3 shows in section the central module of the light source of FIG. 1,
- la figure 4 montre, dans ses parties A-C, le support de la diode Led à savoir :FIG. 4 shows, in its parts A-C, the support of the Led diode, namely:
* la figure 4A est une vue éclatée du support et de la diode,FIG. 4A is an exploded view of the support and the diode,
* la figure 4B est une vue de dessus du support, * la figure 4C est une coupe axiale du support,FIG. 4B is a view from above of the support, FIG. 4C is an axial section of the support,
- la figure 5 montre, dans ses parties A-E, différents éléments du module central, à savoir :FIG. 5 shows, in parts A-E, different elements of the central module, namely:
* la figure 5A est une vue en coupe de l'enveloppe primaire,FIG. 5A is a sectional view of the primary envelope,
* la figure 5B est une vue en coupe axiale de l'enveloppe pri- maire munie de la diode et de son support,FIG. 5B is a view in axial section of the primary envelope provided with the diode and its support,
* la figure 5C est une vue en coupe axiale du réflecteur,FIG. 5C is an axial sectional view of the reflector,
* la figure 5D est une vue en coupe axiale de deux variantes de l'optique,FIG. 5D is an axial sectional view of two variants of the optics,
* la figure 5E est une coupe axiale du manchon de fixation du support,FIG. 5E is an axial section of the support fixing sleeve,
- la figure 6A est une coupe axiale du module central et de l'enveloppe secondaire selon deux formes de réalisation, - la figure 6B est une coupe axiale du bouchon et du couvercle du sous- ensemble représenté à la figure 6A,FIG. 6A is an axial section of the central module and the secondary envelope according to two embodiments, FIG. 6B is an axial section of the plug and the cover of the subassembly shown in FIG. 6A,
- la figure 7 est une coupe axiale partielle d'une autre variante de source lumineuse. Description de modes de réalisation de l'invention- Figure 7 is a partial axial section of another light source variant. Description of Embodiments of the Invention
Selon la figure 1 , un premier mode de réalisation d'une source lumineuse à diode Led de puissance selon l'invention, se compose d'un module central 100 comprenant une enveloppe primaire 1 10 en forme de cylindre 1 13 dont le fond 1 1 1 percé d'un orifice 1 12, recevant une diode Led 120 portée par un support 130 lui-même fixé au fond 1 1 1 par un manchon fileté 140 formant écrou.According to FIG. 1, a first embodiment of a power LED diode light source according to the invention, consists of a central module 100 comprising a primary casing 1 10 in the form of a cylinder 1 13 whose bottom 1 1 1 pierced with an orifice January 12, receiving a Led diode 120 carried by a support 130 itself fixed to the bottom 1 1 1 by a threaded sleeve 140 forming a nut.
L'orifice avant 1 14 du cylindre 1 13 de l'enveloppe primaire 1 10 est fermé par une optique 150, 150A assurant la formation du faisceau lumineux émis par la diode Led 120. Un réflecteur 155 est inter- posé entre la diode 120 et l'optique 150, 150A pour canaliser le flux lumineux vers l'optique.The front orifice 1 14 of the cylinder 1 13 of the primary envelope 1 10 is closed by an optical 150, 150A ensuring the formation of the light beam emitted by the Led diode 120. A reflector 155 is interposed between the diode 120 and the optics 150, 150A for channeling the luminous flux towards the optics.
Ce module central 100 est combiné à une enveloppe secondaire ou enveloppe extérieure 200, 200A représentée dans ses deux variantes à gauche et à droite de la ligne d'axe XX. L'enveloppe se- condaire 200, 200A définit avec l'enveloppe primaire 100, une enceinte 250 recevant un liquide de refroidissement. Cette enceinte 250 est fermée par un bouchon 260 appliqué sur le dessus et serré par un couvercle 270 vissé sur l'enveloppe secondaire 200, 200A.This central module 100 is combined with a secondary envelope or outer envelope 200, 200A shown in its two variants to the left and right of the axis line XX. The secondary casing 200, 200A defines with the primary casing 100, a chamber 250 receiving a cooling liquid. This enclosure 250 is closed by a cap 260 applied on the top and tightened by a cover 270 screwed on the secondary casing 200, 200A.
Dans ce mode de réalisation, on a également des ressorts de fixation 280 prévus extérieurement sur l'enveloppe secondaire 200, 200A et une collerette d'enjoliveur 285, 285A avec deux formes légèrement différentes pour se fixer sur l'avant de l'enveloppe secondaire 200, 200A.In this embodiment, there are also fastening springs 280 provided externally on the secondary casing 200, 200A and a hubcap flange 285, 285A with two slightly different shapes to attach to the front of the secondary casing 200, 200A.
Les différents éléments du premier mode de réalisation seront décrits de manière plus détaillée à l'aide des figures 3 à 6. La figure 2 montre un second mode de réalisation d'une source lumineuse à diode Led selon l'invention. Cette source lumineuse se compose d'une diode 120 portée par un support 130 fixé au fond 41 1 d'une enveloppe primaire 310 également en forme de cylindre 313. Toutefois, à la différence du premier mode de réalisation, la diode 120 est fixée sur la face extérieure du fond 31 1 de l'enveloppe 310 et non à l'intérieur de celle-ci.The various elements of the first embodiment will be described in more detail with reference to FIGS. 3 to 6. FIG. 2 shows a second embodiment of a LED diode light source according to the invention. This light source consists of a diode 120 carried by a support 130 fixed to the bottom 41 1 of a primary casing 310 also in the form of a cylinder 313. However, unlike the first embodiment, the diode 120 is fixed on the outer face of the bottom 31 1 of the envelope 310 and not inside thereof.
L'enveloppe primaire 310 est combinée à une enveloppe secondaire 400 (enveloppe extérieure) définissant une enceinte 250 recevant un liquide de refroidissement. Cette enceinte 250 de forme annulaire située derrière le plan du support 130 de la diode, est fermée par un bouchon 460, 460A fixé à l'enveloppe secondaire 400 par un couvercle 470.The primary envelope 310 is combined with a secondary envelope 400 (outer envelope) defining an enclosure 250 receiving a coolant. This annular enclosure 250 located behind the plane of the support 130 of the diode, is closed by a plug 460, 460A fixed to the secondary casing 400 by a cover 470.
A l'avant de la diode 120, l'optique 350 est constituée par une calotte arrondie, par exemple hémisphérique, transparente ou translucide assurant la diffusion du faisceau lumineux émis par la diode Led 120.At the front of the diode 120, the optical 350 is constituted by a rounded cap, for example hemispherical, transparent or translucent ensuring the diffusion of the light beam emitted by the Led diode 120.
A l'arrière, le volume intérieur délimité par l'enveloppe primaire 310 constitue une chambre sèche 451 fermée par un bou- chon 460, 460A. Cette chambre sèche 451 reçoit, le cas échéant, un agent dessiccateur 452 schématisé par des paillettes pour maintenir l'atmosphère de cette chambre 451 parfaitement sèche.At the rear, the interior volume delimited by the primary envelope 310 constitutes a dry chamber 451 closed by a plug 460, 460A. This dry chamber 451 receives, where appropriate, a desiccant 452 schematized by flakes to maintain the atmosphere of this chamber 451 perfectly dry.
Le premier mode de réalisation de la source lumineuse (figure 1) est principalement destiné à être encastré dans une surface munie d'un orifice pour constituer un spot. Il s'agit d'une lampe émettant un flux dirigé de type spot apparent ou encastré pour des applications d'éclairage architectural. Le second mode de réalisation (figure 2) est principalement destiné à être installé dans un support de lampe dans la position de l'orientation de la figure 2 ou dans une position retournée à 180° ou, plus généralement, une orientation quelconque. Il s'agit dans ce second cas d'une lampe d'éclairage, à fonction générale, qui émet une lumière diffuse ; cette lampe est utilisable dans des luminaires munis de diffuseurs opalins tels que des globes, des appliques ou autres.The first embodiment of the light source (Figure 1) is primarily intended to be embedded in a surface provided with an orifice to form a spot. It is a lamp emitting an apparent or recessed spot type directed flux for architectural lighting applications. The second embodiment (Figure 2) is primarily intended to be installed in a lamp holder in the position of the orientation of Figure 2 or in a position returned to 180 ° or, more generally, any orientation. In this second case, it is a lighting lamp with a general function that emits a diffuse light; this lamp can be used in luminaires with opal diffusers such as globes, wall lights or others.
Dans les deux cas, la diode 120 est physiquement isolée de l'ambiance extérieure et du contact direct avec le liquide de refroidissement.In both cases, the diode 120 is physically isolated from the external environment and direct contact with the coolant.
La structure plus détaillée du premier mode de réalisation de la source lumineuse sera décrite ci-après à l'aide des figures 3-6B et, pour sa variante, à l'aide de la figure 7. Selon la figure 3, le module central 100 se compose de l'enveloppe primaire 1 10 en forme de pot ou avec une surface de cylindre 1 13, munie d'un fond 1 1 1 traversé par un orifice 1 12. Cette enceinte primaire 1 10 est en une matière thermoconductrice, par exemple en un métal tel qu'un métal léger comme de l'aluminium, mis en forme par un procédé de formage usuel, par exemple en aluminium moulé ou en aluminium mis en forme par un procédé de filage par choc. La diode Led 120 est fixée avec sa plaquette 121 sur un support 130 tel que celui représenté aux figures 4A-4C. Ce support 130 est lui-même fixé contre le fond 1 1 1 à l'intérieur de l'enveloppe primaire 1 10 en traversant l'orifice 1 12 pour y être bloqué avec interposition d'un joint d'étanchéité 141 , par un écrou en forme de manchon 140.The more detailed structure of the first embodiment of the light source will be described hereinafter with reference to FIGS. 3-6B and, for its variant, with reference to FIG. 100 consists of the primary envelope 1 10 in the form of pot or with a cylinder surface 1 13, provided with a bottom 1 1 1 through which a hole 1 12 passes. This primary enclosure 1 10 is made of a thermally conductive material, for example for example a metal such as a light metal such as aluminum, shaped by a conventional forming process, for example cast aluminum or aluminum shaped by a method of spinning. The LED 120 is fixed with its plate 121 on a support 130 such as that shown in Figures 4A-4C. This support 130 is itself fixed against the bottom 1 1 1 to the inside of the primary casing 1 10 through the orifice 1 12 to be blocked with the interposition of a seal 141, by a nut-shaped sleeve 140.
A l'intérieur de l'enveloppe primaire 1 10, il est prévu un ré- flecteur 155 de forme sensiblement conique coiffant la boule 122 de sortie de lumière de la diode Led 120 pour diriger le flux lumineux contre la face arrière 151 de l'optique 150, 150A en forme de lentille, fixée dans l'ouverture 1 14 de l'enveloppe primaire 1 10. Cette optique a une forme de lentille prolongée par une jupe 152 servant à sa fixation dans l'enveloppe primaire 1 10. Dans la partie gauche, la lentille de l'optique 150 se termine par un bord 153 au niveau du contour de l'enveloppe primaire 1 10 alors que dans la partie droite, l'optique 150A chevauche le bord de l'enveloppe primaire 1 10 par un retour 153A.Inside the primary casing 1 10, there is provided a reflector 155 of substantially conical shape capping the light output ball 122 of the LED 120 to direct the luminous flux against the rear face 151 of the lens 150, 150A lens, fixed in the opening 1 14 of the primary casing 1 10. This optic has a lens shape extended by a skirt 152 for its attachment in the primary casing 1 10. In the left part, the lens of the optical 150 ends with an edge 153 at the contour of the primary casing 1 10 while in the right part, the optic 150A overlaps the edge of the primary casing 1 10 by a back 153A.
Les figures 4A-4C montrent de manière plus détaillée la forme du support 130 de la diode 120.FIGS. 4A-4C show in more detail the shape of the support 130 of the diode 120.
Ce support 130 se compose d'une pièce en forme de disque 131 , muni d'une découpe radiale 132 et se terminant, au niveau de sa face arrière, par un embout fileté 133. La partie en forme de disque 131 est percée par deux orifices 134 permettant la fixation par des rivets de la plaquette 121 portant la diode Led 120.This support 130 consists of a disc-shaped part 131, provided with a radial cut-out 132 and ending, at its rear face, with a threaded end 133. The disc-shaped part 131 is pierced by two orifices 134 for fixing by rivets of the plate 121 carrying the Led diode 120.
Cette fixation, par exemple par deux rivets, permet à la face arrière de la plaquette 121 de la diode 120 de rester étroitement appliquée contre la face du support 130 même si cette liaison est avantageusement complétée par une couche de colle thermoconductrice. Les deux conduc- teurs 123, 124 assurant l'alimentation de la diode 120 et qui partent du dessus de la plaquette 121 , repassent par les deux encoches 125 de la plaquette 121 pour traverser la découpe radiale 132 du support 130 et l'embout fileté 133.This attachment, for example by two rivets, allows the rear face of the wafer 121 of the diode 120 to remain closely applied against the face of the support 130 even if this connection is advantageously completed by a layer of heat-conductive adhesive. The two conductors 123, 124 supplying the diode 120 and leaving the top of the wafer 121, pass through the two notches 125 of the wafer 121 to pass through the radial cut 132 of the support 130 and the threaded end 133.
L'embout fileté 133 sert à fixer le support 130 préalable- ment muni de la plaquette 121 de la diode Led 120 contre le fond 1 1 1 de l'enveloppe primaire 1 10 pour vissage et interposition d'un joint 141. Il est possible, en variante, d'assurer l'étanchéité du passage des deux conducteurs d'alimentation 123, 124 de la diode 120 à travers une étoupe 142 bloquée par une vis 143 formant presse-étoupe, vissée dans le filetage du manchon fileté 140.The threaded end piece 133 serves to fix the support 130 previously provided with the plate 121 of the LED 120 against the bottom 1 1 1 of the primary casing 1 10 for screwing and interposition of a seal 141. It is possible alternatively, sealing the passage of the two supply conductors 123, 124 of the diode 120 through a gage 142 blocked by a screw 143 forming a gland, screwed into the thread of the threaded sleeve 140.
Les figures 5A- 5E montrent la forme des différents autres composants du module central 100. La figure 5 A montre, en coupe axiale, la forme cylindrique circulaire 1 13 de l'enveloppe primaire 1 10 correspondant à un exemple de réalisation. Cette enveloppe primaire 1 10 est en une matière thermoconductrice comme de l'aluminium. Selon une première étape d'assemblage, l'enveloppe 1 10 reçoit le sous-ensemble constitué par la diode 120 fixée à son support 130 dont l'embout 133 est engagé dans l'orifice 1 12 du fond 1 1 1 de l'enveloppe primaire 1 10. Le manchon fileté 140 n'est pas encore vissé sur l'embout fileté 133. La figure 5C montre la forme conique du réflecteur 155 qui peut être droite ou bombée comme cela est esquissé en traits interrompus. Le réflecteur est réalisé en aluminium miroité ou en plastique métallisé avec, de préférence, une rondelle formant un joint, intercalée entre le bord du réflecteur et la diode Led. Ce réflecteur conique 155 se place simple- ment dans l'enveloppe primaire 1 10 en étant retenu par la mise en place de l'optique 150, 150A représentée en coupe à la figure 5D pour ses deux variantes de part et d'autre de l'axe XX. La lentille de l'optique est une pièce de préférence en matière plastique transparente telle que du poly- carbonate, moulé et sa fixation sur le bord de l'ouverture de l'enveloppe primaire est, de préférence, réalisée par collage.Figures 5A-5E show the shape of the various other components of the central module 100. FIG. 5A shows, in axial section, the circular cylindrical shape 1 13 of the primary casing 1 10 corresponding to an exemplary embodiment. This primary casing 1 10 is made of a thermoconductive material such as aluminum. According to a first assembly step, the envelope 1 receives the subassembly constituted by the diode 120 fixed to its support 130, the endpiece 133 of which is engaged in the opening 1 12 of the bottom 1 1 1 of the envelope The threaded sleeve 140 is not yet screwed onto the threaded end 133. FIG. 5C shows the conical shape of the reflector 155 which may be straight or curved as shown in broken lines. The reflector is made of mirrored aluminum or metallized plastic with, preferably, a washer forming a seal, interposed between the edge of the reflector and the Led diode. This conical reflector 155 is placed simply in the primary casing 1 10 being retained by the establishment of the optical 150, 150A shown in section in Figure 5D for its two variants on either side of the XX axis. The lens of the optic is preferably a piece of transparent plastic material such as molded polycarbonate and its attachment to the edge of the opening of the primary envelope is preferably made by gluing.
La figure 5E montre l'écrou 140 en forme de manchon servant à la fois à bloquer le support 130 avec la diode Led contre le fond 1 1 1 de l'enveloppe primaire 1 10 et à recevoir, le cas échéant, l'étoupe 142 et le presse-étoupe 143 comme cela a été décrit, et aussi le bouchon 260. Le support 130 de la diode Led est en un matériau thermoconducteur, par exemple une pièce en laiton ou en un alliage, facile à usiner.FIG. 5E shows the nut 140 in the form of a sleeve serving both to block the support 130 with the LED against the bottom 1 1 1 of the primary envelope 1 10 and to receive, if necessary, the tow 142 and the gland 143 as described, and also the plug 260. The support 130 of the Led diode is made of a thermally conductive material, for example a piece of brass or an alloy, easy to machine.
La figure 6A montre l'assemblage du module central 100 dans l'enveloppe secondaire 200, 200A. Cette enveloppe secondaire 200, 200A est une pièce de révolution par rapport à l'axe XX.FIG. 6A shows the assembly of the central module 100 in the secondary envelope 200, 200A. This secondary envelope 200, 200A is a piece of revolution relative to the axis XX.
Dans la variante 200 de la moitié gauche de la figure 6A, l'enveloppe secondaire 200 se compose d'une couronne circulaire 210 munie d'un bord circulaire intérieur 220 de faible hauteur et d'un bord circulaire extérieur 230 haut, terminé en partie haute par un filetage 231. Extérieurement, la couronne annulaire 210 se prolonge (21 1) au-delà du bord 230. Le bord intérieur 220 de faible hauteur est une couronne circulaire dans laquelle s'engage l'extrémité avant du cylindre 1 13 du module central 100, garni de son optique 150, 150A. Un joint d'étanchéité 221 , par exemple un cordon de silicone, peut être prévu comme indiqué. L'enveloppe primaire 1 10 et l'enveloppe secondaire 200 délimitent entre elles l'enceinte 250 recevant le liquide de refroidissement. L'enveloppe secondaire 200 est elle-même de préférence réalisée en un matériau thermoconducteur.In variant 200 of the left half of FIG. 6A, the secondary envelope 200 is composed of a circular ring 210 provided with an inner circular edge 220 of small height and of an outer circular edge 230 high, partly completed 231. Externally, the annular ring 210 extends (21 1) beyond the edge 230. The inner edge 220 of low height is a circular ring in which engages the front end of the cylinder 1 13 of the central module 100, packed with its optical 150, 150A. A seal 221, for example a silicone bead, may be provided as indicated. The primary casing 1 10 and the secondary casing 200 delimit between them the enclosure 250 receiving the cooling liquid. The secondary casing 200 is itself preferably made of a thermally conductive material.
Dans la partie droite de la figure 6A, l'enveloppe se- condaire 200A a une forme légèrement différente de façon à absorber le retour 153A de l'optique 150A également modifiée dans cette variante et, le cas échéant, à couvrir comme cela est représenté, le devant de l'optique 150A.In the right part of FIG. 6A, the secondary envelope 200A has a slightly different shape so as to absorb the return 153A of the optic 150A also modified in this variant and, if necessary, to cover as shown , the front of the optics 150A.
Dans cette variante, l'enveloppe secondaire 200A comporte également une couronne circulaire 210A avec un bord 220A de faible hauteur pour recevoir le module central 100 avec son optique 150A débordant et un bord extérieur 230A de hauteur plus importante, analogue à celui du mode de réalisation de la partie gauche, avec en partie haute, un filetage 23 IA. L'enceinte 250 du sous-ensemble ainsi réalisé selon la figure 6A reçoit le liquide de refroidissement qui peut être plus ou moins visqueux.In this variant, the secondary envelope 200A also comprises a circular ring 210A with a low edge 220A for receiving the central module 100 with its optic 150A overflowing and an outer edge 230A of greater height, similar to that of the embodiment of the left part, with in the upper part, a thread 23 IA. The enclosure 250 of the subassembly thus produced according to FIG. 6A receives the coolant which may be more or less viscous.
L'enceinte 250 se ferme à l'aide du bouchon 260 (figure 6B) coiffant le dessus de l'enceinte 250 en étant engagé sur le manchon file- té 140 du module central 100. Le bouchon 260 a une forme de disque avec une couronne centrale 261 formant une lèvre d'étanchéité pour venir autour du manchon 140 du module central 100 et une couronne défor- mable 262, destinée à servir de volume déformable pour la dilatation du liquide de refroidissement. Le bord périphérique 263 du bouchon 260 s'appuie sur le bord de l'enveloppe secondaire 200, 200A.The enclosure 250 closes with the aid of the cap 260 (FIG. 6B) covering the top of the enclosure 250 while being engaged on the threaded sleeve 140 of the central module 100. The plug 260 has a disc shape with a central ring 261 forming a sealing lip to come around the sleeve 140 of the central module 100 and a deformable ring 262, intended to serve as a deformable volume for the expansion of the cooling liquid. The peripheral edge 263 of the cap 260 rests on the edge of the secondary envelope 200, 200A.
L'ensemble formé par le module central 100, l'enveloppe secondaire 200, 200A et le bouchon 260, est bloqué par le couvercle 270 également représenté en coupe. Ce couvercle 270 qui est une pièce de révolution, comporte une jupe périphérique 271 avec un filetage 272 corres- pondant à celui de l'enveloppe secondaire 200, 200A pour se visser sur ce filetage avec interposition du bouchon 260. La partie supérieure du couvercle est munie d'un orifice 273 pour le passage des câbles d'alimentation 123, 124 de la diode Led 120. Le remplissage de l'enceinte 250 avec du liquide de refroidissement se fait avant la mise en place du bouchon 260.The assembly formed by the central module 100, the secondary envelope 200, 200A and the plug 260, is blocked by the cover 270 also shown in section. This cover 270 which is a part of revolution, comprises a peripheral skirt 271 with a thread 272 corresponding to that of the secondary casing 200, 200A to be screwed on this thread with interposition of the plug 260. The upper part of the lid is provided with a hole 273 for the passage of the power cables 123, 124 of the Led diode 120. The filling of the enclosure 250 with coolant is done before the introduction of the cap 260.
La figure 7 montre une variante de bouchon 260A pour le premier mode de réalisation, les autres éléments étant identiques à ceux déjà décrits.Figure 7 shows a plug variant 260A for the first embodiment, the other elements being identical to those already described.
Ce bouchon 260A a une couronne annulaire 262 A à section en forme de V et comporte deux tubes de remplissage 265A, 266A. Le bouchon 260A se met en place dans l'enveloppe secondaire 200, 200A avant le remplissage ou le remplissage complet de l'enceinte 250 avec du liquide de refroidissement ; le complément de remplissage se fait à l'aide des manchons 265A, 266A dont l'un sert à l'entrée du liquide et l'autre à l'évacuation de l'air ; ils sont représentés en position pliée par le couvercle ; ce pliage en assure la fermeture étanche. Le dessous du couvercle 270 a une nervure 274 pour favoriser le pliage des tubes 265A, 266A. Lorsque le couvercle 270 est enlevé, les deux tubes 265A, 266A se dressent et permettent l'entrée du liquide et la sortie de l'air. Une fois cette opération terminée, on visse le couvercle 270 de façon à plier les deux tubes 265A, 266A qui, du fait du pli, ferment de manière étanche l'enceinte 250 remplie de liquide de refroidissement. Le mode de réalisation de la figure 2 a une structure qui, dans son principe est identique à celle de la première variante, mais elle en diffère dans sa forme. Pour faciliter et simplifier la description, les éléments identiques ou analogues à ceux du premier mode de réalisation portent les mêmes références augmentées de 200. La description de tous ces éléments ne sera pas systématiquement reprise, de façon à insister seulement sur les différences entre le second mode de réalisation et le premier. Les éléments strictement identiques à ceux du premier mode de réalisation portent des références inchangées.This plug 260A has an annular ring 262 A with a V-shaped section and comprises two filling tubes 265A, 266A. The plug 260A is put in place in the secondary casing 200, 200A before the filling or the complete filling of the enclosure 250 with coolant; the filling supplement is made using the sleeves 265A, 266A, one of which serves for the entry of the liquid and the other for the evacuation of air; they are represented in folded position by the lid; this folding ensures the tight closure. The underside of the cover 270 has a rib 274 to assist the bending of the tubes 265A, 266A. When the cover 270 is removed, the two tubes 265A, 266A stand up and allow the entry of the liquid and the exit of the air. Once this operation is completed, the cover 270 is screwed so as to fold the two tubes 265A, 266A which, because of the fold, seal the enclosure 250 filled with cooling liquid. The embodiment of Figure 2 has a structure which in principle is identical to that of the first variant, but differs in its form. To facilitate and simplify the description, elements identical or similar to those of the first embodiment have the same references increased by 200. The description of all these elements will not be systematically repeated, so as to emphasize only the differences between the second embodiment and the first. The elements strictly identical to those of the first embodiment carry unchanged references.
Ainsi, le support 130 de la diode Led 120 est fixé contre le fond 31 1 de l'enveloppe primaire 310 également en forme de cylindre 313 mais contre la face extérieure de ce fond. La fixation se fait également par l'embout fileté 133 du support 130 qui reçoit un écrou 340. Les autres éléments de la diode et de sa fixation au support 130 sont identiques à ceux du premier mode de réalisation. Les câbles d'alimentation 123, 124 de la diode 120 passent à l'intérieur de l'embout fileté 133 du support pour traverser la chambre sèche 451 et le bouchon 453 obturant celle-ci pour sortir à l'arrière ou sur le dessus de l'ensemble. L'enveloppe primaire 310 se prolonge au-delà du fond 31 1 par un rebord 315 servant à la mise en en place du dôme ou de la calotte 350 de diffusion de la lumière. Cette calotte 350 est fixée à l'enveloppe primaire 310 par un cordon de scellement 351.Thus, the support 130 of the Led diode 120 is fixed against the bottom 31 1 of the primary casing 310 also in the form of a cylinder 313 but against the outer face of this bottom. Fixing is also done by the threaded end 133 of the support 130 which receives a nut 340. The other elements of the diode and its attachment to the support 130 are identical to those of the first embodiment. The supply cables 123, 124 of the diode 120 pass inside the threaded end 133 of the support to pass through the dry chamber 451 and the plug 453 closing the latter to exit at the rear or on the top of the all. The primary casing 310 extends beyond the bottom 31 1 by a flange 315 serving for the purpose of in place of the dome or cap 350 of light scattering. This cap 350 is fixed to the primary casing 310 by a sealing bead 351.
L'enveloppe primaire 310 comporte également une cou- ronne périphérique 316 contre laquelle est fixée l'enveloppe secondaire 400 par l'intermédiaire d'une liaison collée 401 représentée schématiquement.The primary casing 310 also has a peripheral ring 316 against which the secondary casing 400 is fixed by means of a bonded connection 401 shown schematically.
Comme la diode 120 est fixée contre la face extérieure du fond 31 1 de l'enveloppe primaire 310, l'enceinte 450 pour le liquide de re- froidissement délimitée par la paroi cylindrique 313 « arrière » de l'enveloppe primaire 310 et l'enveloppe secondaire 400 se trouve ainsi du côté arrière de la source lumineuse. L'enveloppe secondaire 400 a une forme et une disposition appropriées de manière à constituer l'enceinte annulaire 450 recevant le liquide de refroidissement. Comme précédemment, l'enveloppe primaire 310 et l'enveloppe secondaire 400 sont thermoconductrices.As the diode 120 is fixed against the outer face of the bottom 31 1 of the primary casing 310, the enclosure 450 for the cooling liquid delimited by the cylindrical wall 313 "rear" of the primary casing 310 and the secondary envelope 400 is thus on the back side of the light source. The secondary casing 400 is shaped and arranged appropriately to form the annular enclosure 450 receiving the coolant. As before, the primary envelope 310 and the secondary envelope 400 are thermoconductive.
L'enceinte 450 est fermée par un bouchon 460, 460A qui, dans sa variante de gauche 460, comporte des lèvres 461 pour compléter l'étanchéité de l'enceinte 450. Ces lèvres ne sont pas prévues dans la va- riante 460A de la partie droite de la figure 2.The enclosure 450 is closed by a plug 460, 460A which, in its left variant 460, comprises lips 461 to complete the sealing of the enclosure 450. These lips are not provided in the variant 460A of the right part of Figure 2.
La figure 2 montre schématiquement une déformation en pointillés du bouchon 460, 460A qui représente l'éventuelle dilatation du volume du liquide dans l'enceinte 450 sous l'effet d'une élévation de température. Le bouchon 460, 460A est plaqué contre le dessus de l'enveloppe primaire 310 et de l'enveloppe secondaire 400 par un couvercle 470 approprié ayant des surfaces d'appui correspondantes. Ainsi, le couvercle 470 se compose d'un tube central 473 dans une position homologue à celle du bord de l'enveloppe primaire 310. Puis, le couvercle 470 se poursuit par une surface 474 plane, extérieure, en forme de couronne circu- laire puis, d'une retombée 475 formant une surface d'appui pour venir sur le bouchon 460, 460A. Enfin, il y a un retour 471 avec un filetage pour se visser sur le filetage extérieur de l'enveloppe secondaire 400.FIG. 2 schematically shows a dotted deformation of the plug 460, 460A which represents the possible expansion of the volume of the liquid in the enclosure 450 under the effect of a rise in temperature. The plug 460, 460A is pressed against the top of the primary shell 310 and the secondary shell 400 by a suitable cover 470 having corresponding bearing surfaces. Thus, the cover 470 consists of a central tube 473 in a position homologous to that of the edge of the primary envelope 310. Then, the cover 470 is continued by a surface 474 which is plane, external, in the shape of a circular ring. then, a fallout 475 forming a bearing surface to come on the plug 460, 460A. Finally, there is a return 471 with a thread to screw on the external thread of the secondary casing 400.
Le remplissage de l'enceinte se fait à l'aide de deux perçages 405, 406 dont l'un permet l'entrée du liquide de refroidissement et l'autre, l'évacuation de l'air. Le remplissage se fait dans une position renversée par rapport à celle représentée à la figure 2.The enclosure is filled with two holes 405, 406, one of which allows the entry of coolant and the other, the evacuation of air. The filling is in a reversed position compared to that shown in Figure 2.
Le liquide de refroidissement servant au refroidissement est par exemple un liquide d'origine végétale ou minérale. Il peut s'agit d'huile ou de paraffine, d'une résine de synthèse ayant un fort pouvoir de contact avec les parois, c'est-à-dire une excellente mouillabilité en plus des qualités de thermoconduction. The coolant for cooling is for example a liquid of vegetable or mineral origin. It can be oil or paraffin, a synthetic resin having a high power of contact with the walls, that is to say excellent wettability in addition to the thermoconducting qualities.
N O M EN C LATU RENOMENCLATURE
100 module central100 central module
110, 310 enveloppe primaire110, 310 primary envelope
111, 311 fond111, 311 background
112 orifice112 orifice
113 surface cylindrique113 cylindrical surface
120 diode Led120 LED diode
121 plaquette121 booklet
122 boule de sortie de lumière122 light output ball
125 encoche125 notches
130 support130 support
131 partie en forme de disque131 disc shaped part
132 découpe radiale132 radial cut
133 embout fileté133 threaded end
134 orifices de la partie en forme de disque134 holes in the disc-shaped part
141 joint d'étanchéité141 seal
142 étoupe142 tows
143 vis presse-étoupe143 screw stuffing box
150, 150A optique notamment lentille150, 150A optics including lens
152 jupe152 skirt
200, 200A, 400 enveloppe extérieure200, 200A, 400 outer envelope
210 couronne annulaire210 annular ring
230 paroi montante230 rising wall
230A couronne extérieure230A outer ring
250, 450 enceinte250, 450 pregnant
260, 460 bouchon260, 460 stopper
265A, 266A tubes265A, 266A tubes
270, 470 couvercle270, 470 cover
274 nervure274 rib
280 ressorts de fixation280 fixing springs
285, 285A collerette d'enjoliveur285, 285A flange of hubcap
315 rebord315 ledge
340 écrou340 nut
350 dôme ou calotte de diffusion de la lumière350 dome or cap of light diffusion
405, 406 perçages405, 406 holes
451 chambre sèche451 dry room
453 bouchon 471 retour453 stopper 471 return
473 tube central473 central tube
474 surface plane474 flat surface
475 retombée 475 fallout

Claims

R E V E N D I C A T I O N SR E V E N D I C A T IO N S
1°) Source lumineuse à diode Led de puissance équipée d'un système de refroidissement par fluide de refroidissement, caractérisée en ce qu' elle comprend1) Power LED diode light source equipped with a cooling fluid cooling system, characterized in that it comprises
- une diode Led de puissance (120) munie d'un support thermoconducteur (130),a power LED (120) provided with a thermally conductive support (130),
- une enveloppe primaire (1 10), thermoconductrice, reliée au support (130) par une liaison de conduction thermique, - une enveloppe secondaire (200, 200A) thermoconductrice, reliée à l'enveloppe primaire (1 10) et formant avec celle-ci, une enceinte (250) recevant un liquide de refroidissement, la diode Led (120) étant extérieure à l'enceinte (250).a heat-conducting primary casing (1 10) connected to the support (130) by a thermal conduction bond; a thermally conductive secondary casing (200, 200A) connected to and forming with the primary casing (1 10); ci, an enclosure (250) receiving a coolant, the Led diode (120) being external to the enclosure (250).
2°) Source lumineuse selon la revendication 1 , caractérisée en ce que l'enceinte (250) est munie d'un bouchon (260, 260A ; 460, 460A) avec une zone de compensation (262, 262A) de la dilatation du liquide de refroidissement pour éviter l'augmentation de pression à l'intérieur de l'enceinte (250, 450).2 °) light source according to claim 1, characterized in that the enclosure (250) is provided with a plug (260, 260A; 460, 460A) with a compensation zone (262, 262A) of the expansion of the liquid cooling to prevent pressure increase inside the enclosure (250, 450).
3°) Source lumineuse selon la revendication 1 , caractérisée en ce que l'enveloppe primaire (1 10, 310) est en forme de cylindre (1 13, 313) et le support ( 130) de la diode Led (120) est fixé contre le fond (1 1 1 , 31 1) de l'enveloppe (1 10, 310).3 °) light source according to claim 1, characterized in that the primary casing (1 10, 310) is in the form of a cylinder (1 13, 313) and the support (130) of the LED diode (120) is fixed against the bottom (1 1 1, 31 1) of the envelope (1 10, 310).
4°) Source lumineuse selon la revendication 3, caractérisée en ce que la diode Led (120) est fixée à l'intérieur de l'enveloppe primaire (1 10) et l'entrée (1 14) de l'enveloppe porte une optique (150, 150A).4 °) light source according to claim 3, characterized in that the LED (120) is fixed inside the primary envelope (1 10) and the input (1 14) of the envelope carries an optical (150, 150A).
5°) Source lumineuse selon la revendication 3, caractérisée en ce que la diode Led (120) est fixée à l'extérieur, au fond (31 1) de l'enveloppe primaire (310) et forme une chambre sèche (451) derrière la diode Led (120). 6°) Source lumineuse selon la revendication 1 , caractérisée en ce que le support (130) est une plaque métallique (131) dont une face reçoit la diode Led (120) en contact thermoconducteur et l'autre face est munie d'un embout (133) servant à la fixation contre le fond ( 1 1 1 , 31 1) de l'enveloppe principale (1 10, 310) et permettant le passage des câbles d'alimentation (123, 124) de la diode Led (120).5 °) light source according to claim 3, characterized in that the Led diode (120) is attached to the outside, at the bottom (31 1) of the primary casing (310) and forms a dry chamber (451) behind the LED diode (120). 6 °) light source according to claim 1, characterized in that the support (130) is a metal plate (131), one side receives the Led diode (120) in thermally conductive contact and the other side is provided with a tip (133) for fixing against the bottom (1 1 1, 31 1) of the main envelope (1 10, 310) and allowing the passage of the power cables (123, 124) of the LED diode (120) .
7°) Source lumineuse selon la revendication 6, caractérisée en ce que la plaque métallique (131) est munie d'une fente radiale (132) débouchant dans le manchon (133) pour le passage des câbles d'alimentation électrique (123, 124) de la diode Led installée sur l'autre face de la plaque métallique (131).7 °) light source according to claim 6, characterized in that the metal plate (131) is provided with a radial slot (132) opening into the sleeve (133) for the passage of the power supply cables (123, 124 ) of the LED diode installed on the other side of the metal plate (131).
8°) Source lumineuse selon la revendication 3, caractérisée en ce que la diode Led (120) et son support (130) sont logés dans l'enveloppe primaire (1 10) qui reçoit un réflecteur (155) et dont l'ouverture (1 14) est fer- mée par une optique (150, 150A).8 °) light source according to claim 3, characterized in that the LED (120) and its support (130) are housed in the primary envelope (1 10) which receives a reflector (155) and whose opening ( 1 14) is closed by optics (150, 150A).
9°) Source lumineuse selon la revendication 3, caractérisée en ce que la diode Led (120) et son support (130) sont fixés contre la face extérieure du fond (31 1) de l'enveloppe primaire (310) qui se poursuit vers l'arrière du support (130) par une surface cylindrique (313) délimitant avec l'enveloppe secondaire (400, 400A), une enceinte (450) située à l'arrière par rapport au plan du support (130) portant la diode Led (120).9 °) light source according to claim 3, characterized in that the Led diode (120) and its support (130) are fixed against the outer face of the bottom (31 1) of the primary envelope (310) which continues towards the rear of the support (130) by a cylindrical surface (313) delimiting with the secondary envelope (400, 400A), an enclosure (450) located at the rear relative to the plane of the support (130) carrying the Led diode (120).
10°) Source lumineuse selon la revendication 9, caractérisée en ce que le volume intérieur (451) de l'enveloppe primaire (310) à l'intérieur de la surface cylindrique (313) constitue une chambre sèche contenant, le cas échéant, un agent dessiccateur (452). 10 °) light source according to claim 9, characterized in that the internal volume (451) of the primary casing (310) inside the cylindrical surface (313) constitutes a dry chamber containing, where appropriate, a drying agent (452).
PCT/FR2009/052101 2008-11-28 2009-10-30 Power led diode light source with fluid cooling system WO2010061087A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0806718 2008-11-28
FR0806718A FR2939183B1 (en) 2008-11-28 2008-11-28 POWER LED DIODE LIGHT SOURCE EQUIPPED WITH FLUID COOLING SYSTEM

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WO2010061087A1 true WO2010061087A1 (en) 2010-06-03

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CN102032513A (en) * 2010-11-10 2011-04-27 深圳市宝莱德光电科技有限公司 Compulsory water-cooled LED street lamp
CN102313160A (en) * 2010-07-08 2012-01-11 艾迪光电（杭州）有限公司 Light-emitting diode (LED) lamp
US9401468B2 (en) 2014-12-24 2016-07-26 GE Lighting Solutions, LLC Lamp with LED chips cooled by a phase transformation loop
CN114430729A (en) * 2019-05-10 2022-05-03 佩施紫外线有限公司 Lamp module and photoreactor comprising light emitting diodes

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US20060090881A1 (en) * 2004-10-29 2006-05-04 3M Innovative Properties Company Immersion cooling apparatus
KR20070097004A (en) * 2007-09-10 2007-10-02 주식회사 썬라이팅 A cooling device for lamp with power light emitting diode

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EP0224448A2 (en) * 1985-10-28 1987-06-03 Jaime Santana Pomares Luminous energy transmitter device
US5556193A (en) * 1995-06-06 1996-09-17 Adac Plastics, Inc. Motor vehicle lamp with improved ventilating means
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FR2939183B1 (en) 2011-04-15

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