Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
  • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
  • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
  • F21V29/86—Ceramics or glass
• • 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
  • F21K9/232—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 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
  • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
  • F21V29/50—Cooling arrangements
  • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
  • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
  • F21V29/76—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
  • F21V29/763—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section the planes containing the fins or blades having 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
  • F21V29/70—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
  • 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
  • F21V23/06—Arrangement of electric circuit elements in or on lighting devices the elements being coupling devices, e.g. connectors
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
  • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
  • F21V29/50—Cooling arrangements
  • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
  • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
  • F21V29/75—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with fins or blades having different shapes, thicknesses or spacing
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
  • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
  • F21V29/50—Cooling arrangements
  • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
  • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
  • F21V29/76—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
  • F21Y2115/00—Light-generating elements of semiconductor light sources
  • F21Y2115/10—Light-emitting diodes [LED]

Definitions

• the present invention relates to a light emitting diode lamp.
• LED lamps traditionally comprise a heat sink in contact with the ambient air, generally located at the rear of these lamps, at a non-visible part thereof (for example behind a false ceiling ).
• the speed of the heat exchange between the heat sink and the ambient air is important for the proper functioning of the LED lamps.
• existing LED lamps are generally intended to operate in a predetermined orientation.
• existing LED lamps conventionally include optics and LEDs facing down to illuminate a subjacent area, while the heat sink is arranged upwardly.
• these LED lamps can not operate properly in another position, especially in an inverted position (optical and LED up and heat sink down). Indeed, the diffusion of the air heated by the heatsink would be hindered by the rest of the lamp.
• CN101761812 shows a light emitting diode lamp.
• the lamp according to document CN101761812 has a base with slots allowing the air to rush into the base, where is the power supply (or driver), so that the air is heated by the power supply. even before reaching the cooling zone of the light-emitting diodes.
• the patent documents US2009 / 1 16233, US2005 / 174780 and US201 1/0140587 also show lighting devices in which the air rushes into the base, via slots or orifices formed thereon, before reaching in the cooling zone of the light sources, which also leads to relatively inefficient cooling.
• the present invention aims to overcome all or part of these disadvantages by providing an LED lamp for efficient and rapid heat dissipation of the heat generated during operation, including for reversed operating positions, while being of reliable structure and inexpensive.
• the subject of the present invention is a light-emitting diode lamp, characterized in that the lamp comprises a base supporting at least one lighting module, the lighting module or modules delimiting at least one duct for drawing and air outlet comprising at least one proximal opening located near the base and adapted for the introduction of air into the duct or the discharge of air from the duct, and at least one distal opening opposite to the or the proximal openings and adapted for discharging air out of the duct or introducing air into the duct, each lighting module comprising at least one printed circuit with an outer face supporting at least one light-emitting diode and one face interior directed towards the duct, in order to generate an air circulation effect in the duct contributing to the cooling of the printed circuits.
• the lamp according to the invention provides efficient cooling of the printed circuits supporting the light-emitting diodes.
• the printed circuits heat up. Due to the orientation of their inner face to the duct, the ambient air in the duct also heats. The hot air in the duct rises and is discharged through the distal end (for a lamp whose distal end is directed upwards). This results in the suction of fresh air near the proximal openings. This fresh air is accelerated in the duct towards the distal opening, heating up to its discharge via the distal end.
• the air flow is substantially vertical, not radial, the air inlet is from the bottom and the outlet from the top of the lamp.
• the lamp according to the invention can be used in a reverse position, that is to say distal opening oriented downwards.
• the fresh air is then sucked through the distal opening, warms up and accelerates until it is evacuated via the proximal openings.
• the lamp according to the invention produces a pulling effect, therefore natural, passive.
• the air flow in the chimney duct is not performed by means of forced convection.
• the lighting module or modules comprise ceramic heat dissipation means.
• the printed circuit of one or of one of the lighting modules is ceramic.
• the outer face of the printed circuit of one or of one of the lighting modules is at least partially covered by a ceramic coating.
• the outer face of the printed circuit of the or one of the lighting modules is at least partially covered by a ceramic plate attached and arranged in abutment against the outer face.
• the lamp comprises a plurality of lighting modules, and the lamp comprises, inside the duct for drawing and discharging, between the lighting modules, an interposing member forming an obstacle to the radiation heat transmission from one of the lighting modules to another of the lighting modules.
• the interposition member has a plurality of interposition faces, as far as the lamp comprises lighting modules, each interposition face being arranged opposite and at a distance from the outer face of the printed circuit of one of the lighting modules.
• the interposer is made of plastic.
• each lighting module comprises a frame bearing against the printed circuit, the frame comprising a first functional wall at least partially delimiting the conduit, in which the frame forms a flange framing the printed circuit and supports an optical , in which the printed circuit is embedded in the frame.
• each lighting module comprises a frame resting against the printed circuit, the frame comprising a first functional wall at least partially delimiting the conduit, in which the frame forms a collar flanking the printed circuit and supports an optical element, wherein the frame is overmolded on the circuit board or ultrasonically welded with the printed circuit board.
• the tightness achieved between the optics and the frame provides a lack of optical opacity, the cooling air flow does not penetrate to the optics.
• each lighting module comprises a frame resting against the printed circuit, the frame comprising a first functional wall at least partially delimiting the conduit.
• the base comprises at least one cavity opening in the extension of the or one of the proximal openings to increase the flow of air entering or leaving each proximal opening.
• a cavity is not an opening opening, so that the air flowing through the cavity can not enter the base on which this cavity is formed, and therefore can not be heated by a power supply.
• each lighting module comprises a heatsink bearing against the inner face of the printed circuit.
• the heat sink comprises at least one heat dissipating fin extending in the conduit in a direction substantially parallel to that of the conduit.
• the lamp comprises a plurality of lighting modules.
• the lamp comprises at least one spacer arranged in the conduit to maintain a constant spacing between the lighting modules.
• the printed circuits of the lighting modules are regularly distributed around the duct to allow 360 ° illumination around the duct.
• the lamp comprises means of electrical connection between each printed circuit and a power supply suitable for supplying the light-emitting diodes, the electrical connection means comprising a main printed circuit to which each printed circuit is connected and to which the power supply is connected. electric.
• the lamp comprises means for fixing each lighting module on the base, the fixing means comprising at least one locking member and a housing shaped to receive and snap the detent member.
• FIG. 1 is a perspective view of a lamp according to one embodiment of the invention
• FIG. 2 is a view from above of a lamp according to one embodiment of the invention.
• FIG. 3 is an exploded view of a lamp according to one embodiment of the invention.
• FIG. 4 is an exploded and front view of a lighting module of a lamp according to one embodiment of the invention.
• FIG. 5 is an exploded rear view of a lighting module of a lamp according to one embodiment of the invention
• FIG. 6 is a schematic view from above and in perspective of a lamp according to another embodiment of the invention
• FIGS. 7 to 9 are top and side views of a lamp according to one embodiment of the invention.
• FIG. 1 shows a lamp 1 according to one embodiment of the invention.
• the lamp 1 comprises a base 2 on which are fixed one or more lighting modules 4.
• the lamp 1 advantageously comprises a plurality of lighting modules 4, for example three lighting modules 4, as shown in FIG. 1.
• the lighting modules 4 are arranged and shaped to delimit a duct 6 intended for the circulation of the ambient air between the lighting modules 4.
• the lighting modules 4 can extend in a substantially parallel manner with respect to each other. to others, as in the example of Figure 1.
• the duct 6 comprises a distal opening 8 and, according to the embodiment illustrated in Figure 1, three proximal openings 10 located near the base 2.
• the duct 6 may have a substantially flared shape.
• the conduit 6 is intended for drawing and evacuating ambient air from the proximal openings 10 towards the distal end 8, or conversely if the lamp 1 is reversed, to allow the lighting modules 4 to cool.
• conduit means a substantially longitudinal space forming a chimney for drawing a fluid through an inlet and the evacuation of the fluid via an outlet, with the creation of an acceleration of the air circulation in the space forming a chimney.
• the duct 6 may have lateral slots 12 widening towards the distal opening 8 and / or the proximal openings 10, as long as the lateral slots 12 do not substantially affect the pulling and evacuation effect of air through the proximal openings 10 and the distal opening 8.
• each lighting module 4 comprises a printed circuit 14.
• the printed circuit 14 comprises an inner face 16 directed towards the inside of the conduit 6, and an outer face 18 supporting a plurality of light emitting diodes (LEDs) 20.
• the LEDs 20 advantageously correspond to power diodes for lighting a room. They can have a power greater than 1 Watt.
• the LEDs 20 of each lighting module 4 can be aligned substantially parallel to the direction in which the duct 6 extends.
• the base 2 may comprise an inner housing 22 containing a power supply 24.
• the power supply 24 is adapted to power the LEDs 20.
• the base 2 can comprise a main portion 26, in which the inner housing 22 can be formed, and a secondary portion 28 forming a lid fixed on the main portion 26.
• the lighting modules 4 can to be fixed on the secondary portion 28 of the base 2.
• the base 2 advantageously comprises cavities 30 shaped to increase the inflow or outflow of air through the proximal openings 10.
• the proximal openings 10 advantageously open out onto the cavities 30.
• the lamp 1 can comprise means of electrical connection to a local electrical network, for example a base 32.
• the base 32 is for example attached to the main portion 26.
• the conduit 6 can extend in a direction substantially parallel to that in which extends the base 32.
• the lighting modules 4 can also extend in a direction substantially parallel to that in which the base 32 extends.
• the printed circuits 14 may be evenly distributed around the duct 6 so that the LEDs 20 radiate 360 ° radially around the duct 6.
• the normal to each outer face 18 may extend in a substantially radial direction.
• the lighting modules 4 are evenly distributed around the duct 6, every 120 °.
• Each lighting module 4 may comprise a heat sink 34 resting against the inner face 16 of the printed circuit 14.
• the heat sink 34 is located in the duct 6.
• the heat sink 34 may comprise a plurality of fins 36 intended to increase the heat exchange surface.
• the fins 36 extend in the duct 6.
• Each fin 36 may advantageously extend in one direction substantially parallel to that in which the duct 6 extends, so as not to hinder the flow of air flowing in the duct 6.
• the lamp 1 may also comprise a spacer 38.
• the spacer 38 is here arranged in the duct 6 to maintain a constant spacing between the lighting modules 4.
• the spacer 38 corresponds to a multipode member, tripod in this case (because the lamp 1 according to the embodiment of Figures 1 to 5 comprises three lighting modules 4).
• the spacer 38 thus comprises here three feet 40, each leg 40 being in abutment against one of the lighting modules 4. The feet 40 can bear against the heat sink 34 of each lighting module 4.
• Each lighting module 4 comprises a frame 42 forming a collar flanking the printed circuit 14.
• the frame 42 bears against the outer face 18 of the printed circuit 14.
• the frame 42 comprises a first functional wall 44 shaped to at least partially delimit the duct 6.
• the first functional wall 44 extends at the periphery of the printed circuit 14; it surrounds the printed circuit 14.
• the printed circuit 14 is advantageously encased in the frame 42.
• the frame 42 may be overmoulded on the printed circuit 14, or overmolded if necessary on the assembly formed by the printed circuit 14 and the heat sink 34.
• the frame 42 can be ultrasonically welded with the printed circuit board 14.
• the frame 42 may comprise two parts 46, 48 between which the circuit board is arranged.
• the frame 42 bears against the outer face 18 of the printed circuit 14.
• the frame 42 advantageously comprises a plurality of openings 50, each opening 50 being intended to receive one of the LEDs 20.
• the frame 42 may also include a second functional wall 52 extending around the LEDs 20.
• the second functional wall 52 is advantageously reflective, for example coated with a layer of a reflective material. It can be concave, as in the example of Figures 4 and 5.
• Each lighting module 4 may comprise an optic 54 supported for example by the frame 42.
• the frame 42 can be glued to the base 2, in particular to the secondary portion 28 of the base 2.
• the lamp 1 comprises means of electrical connection between each printed circuit 14 and the power supply 24 included in the base 2.
• the electrical connection means comprise a main printed circuit 56 connected to the power supply 24.
• Plug-in means like pins 58 and holes 60 formed in the main printed circuit 56 and intended to receive the pins 58, allow the electrical connection between each printed circuit 14 and the main electrical circuit 56.
• the lamp 1 also comprises means for fixing each lighting module 4 on the base 2.
• the fixing means comprise, for example, at least one deformable locking member 62 extending from a lower portion 64 of the frame 42, and a housing 66 for receiving the lower portion 64 of the frame 42 and shaped to engage the lighting module 4 on the base 2 when the detent member 62 is inserted into the housing 66.
• the housing 66 may be provided on the secondary portion 28 of the base 2. It may advantageously lead to the main printed circuit 56 to allow the electrical connection between each printed circuit 14 and the main printed circuit 56.
• each lighting module 4 comprises, instead of a heat sink 34, a ceramic plate 67 arranged in abutment against the outer face 18 of the corresponding printed circuit 14.
• Each printed circuit board 14 may itself be made of ceramic material, or the outer face 18 of each printed circuit 14 may comprise a ceramic coating.
• the ceramic plate, or the outer face 18 made of ceramic or supporting a ceramic coating is advantageously flat. It is devoid of fins extending inside the conduit.
• an interposition member 68 may be arranged in the duct, between the lighting modules 4 and in particular at distance of the lighting modules 4, to limit the radiation heat transmission between the adjacent lighting modules 4.
• the interposition member 68 may extend longitudinally in the conduit. It may have a triangular shape, and several faces 70, as far as the lamp 1 comprises lighting modules 4, in this case three, each face 70 being arranged opposite and at a distance from the outer face 18 of one
• the faces 70 may be substantially parallel to the outer face 18 to which they face.
• the interposition member 68 may correspond to a plastic part, which is thermally non-conductive.
• the lamp 1 may comprise more or less than three lighting modules 4.
• the duct 6 may be devoid of lateral slots 12 separating the lighting modules 4, so that the lighting modules 4 are connected to each other.
• the lighting module or modules 4, and in particular their optics 54 and their frame 42 may be shaped together to form a sphere, as illustrated in FIGS. 7 to 9.

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

Applications Claiming Priority (2)

Publications (1)

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Citations (2)

Family Cites Families (12)

• 2012
  • 2012-04-03 FR FR1253046A patent/FR2988811B1/fr active Active
• 2013
  • 2013-03-29 EP EP13719953.5A patent/EP2834558A1/de not_active Withdrawn
  • 2013-03-29 WO PCT/FR2013/050702 patent/WO2013150227A1/fr active Application Filing

Patent Citations (2)

Non-Patent Citations (1)

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