EP2394096A1 - Corps de refroidissement pour un dispositif d'éclairage - Google Patents

Corps de refroidissement pour un dispositif d'éclairage

Info

Publication number
EP2394096A1
EP2394096A1 EP10704345A EP10704345A EP2394096A1 EP 2394096 A1 EP2394096 A1 EP 2394096A1 EP 10704345 A EP10704345 A EP 10704345A EP 10704345 A EP10704345 A EP 10704345A EP 2394096 A1 EP2394096 A1 EP 2394096A1
Authority
EP
European Patent Office
Prior art keywords
heat sink
cooling
housing
cooling fins
lighting device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP10704345A
Other languages
German (de)
English (en)
Inventor
Nicole Breidenassel
Günter HÖTZL
Fabian Reingruber
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Osram GmbH
Original Assignee
Osram GmbH
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 Osram GmbH filed Critical Osram GmbH
Publication of EP2394096A1 publication Critical patent/EP2394096A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/001—Arrangement of electric circuit elements in or on lighting devices the elements being electrical wires or cables
    • F21V23/002—Arrangements of cables or conductors inside a lighting device, e.g. means for guiding along parts of the housing or in a pivoting arm
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • 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
    • F21V29/77—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical diverging planar fins or blades, e.g. with fan-like or star-like cross-section
    • F21V29/773—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical diverging planar fins or blades, e.g. with fan-like or star-like cross-section the planes containing the fins or blades having the direction of the light emitting axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/506—Cooling arrangements characterised by the adaptation for cooling of specific components of globes, bowls or cover glasses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/508—Cooling arrangements characterised by the adaptation for cooling of specific components of electrical circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/02—Globes; Bowls; Cover glasses characterised by the shape
    • 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
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/30—Elongate light sources, e.g. fluorescent tubes curved
    • F21Y2103/33—Elongate light sources, e.g. fluorescent tubes curved annular
    • 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]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations

Definitions

  • the invention relates to a heat sink for a lighting device, in particular lamp, and a lighting device with the heat sink.
  • LED light emitting diode
  • LED light emitting diode
  • Most cooling fins are designed as lamellar cooling fins, which extend outside along the lamp body. Along these fins, a "chimney effect" is created, which achieves better heat dissipation than heat removal by simple convection or radiation, since the air flows past the fins at increased speed.
  • this effect only occurs when the lamp is in a 'vertical' position, with the cooling fins being vertical. In a 'horizontal' position, where the cooling fins are horizontal or horizontal, the lamp is therefore significantly warmer than in the vertical position.
  • the heat sink has a plurality of cooling fins, wherein adjacent cooling fins each have a cooling rib space limit, and has at least one air channel for connecting at least two cooling rib gaps.
  • a chimney effect can also be generated in the event that the heat sink or its cooling ribs is or are aligned horizontally or horizontally.
  • a heated air in a cooling fin gap air can be removed through the air duct and on through another, higher-lying cooling rib space. Due to the heat sink construction, the lamp can thus be traversed transversely by air currents. This is advantageous, for example, in the case of use near the ground and in the vicinity of a room ceiling, since a vertical air flow arises there due to the air exchange.
  • the cooling ribs or the cooling rib intermediate spaces can adjoin, at least in sections, an inner cavity or free space which contains or forms the at least one air duct.
  • a particularly simple air duct can be formed.
  • the cooling fins may extend at least in sections along a longitudinal axis of the heat sink and around the cavity to the outside, which allows a particularly straight air duct and thus rapid air flow.
  • the cooling fins can be arranged angularly symmetrically about a longitudinal axis of the heat sink around the cavity.
  • the chimney effect is substantially independent of its rotational position about its longitudinal axis when the heat sink is in a horizontal position.
  • At least some cooling fins may at least in sections laterally free edges on both sides.
  • particularly large air passage openings are achieved, which supports a chimney effect.
  • the laterally free edges on both sides In the case of outwardly extending cooling ribs, the outer edge and the inner edge (laterally or with respect to the longitudinal axis) are understood.
  • At least some cooling fins may have free edges at least in sections on three sides. This may in particular mean that these cooling fins are at least partially free and only on one side with another part of the heat sink, z. B. a carrier plate or carrier disc are connected. This allows a particularly air-permeable and lightweight heat sink can be achieved.
  • the free-standing cooling ribs or cooling rib sections may not touch.
  • the disk-shaped part has at least one through opening from the space in front of the disk-shaped part to the space behind the disk-shaped part between the cooling fins.
  • the heat sink is connected to a housing for driver electronics. This allows a particularly compact design of a lighting device can be achieved.
  • the housing for the driver electronics can be attached to a rear end of the cooling fins.
  • a maximum thermal decoupling between a front mounted at least one light source and the control electronics can be achieved.
  • the cable channel may be surrounded by spaced cooling fins, wherein the cooling fins the cable z. B. in cross section surrounded in a star shape.
  • the heat sink can be connected to the housing by means of a cable channel running through the cavity.
  • a cable channel running through the cavity.
  • the cable channel may comprise a light-conducting material.
  • This can be optically coupled to at least one light source. This allows a particularly high-quality appearance and a radiation in the rear space behind the disc-shaped part of the heat sink can be achieved.
  • At least one cooling rib of the housing for the driver electronics is arranged between two cooling fins of the cooling body. This results in a flow-favorable arrangement in which both the driver electronics and the light source to be cooled by the heat sink are cooled particularly effectively.
  • the cooling fins may advantageously be finned cooling fins.
  • the lighting device has at least one such heat sink.
  • the heat sink may be thermally connected to at least one semiconductor light source.
  • the use of the heat sink is also possible with other light sources.
  • the type of semiconductor light source is basically not limited.
  • the Semiconductor light source may have one or more semiconductor emitter, in particular light-emitting diodes (LEDs).
  • the semiconductor emitter (s) may be housed one at a time (eg, 'single LED'), or multiple semiconductor emitters may be mounted on a common substrate
  • Submount be applied, z. B. by equipping a substrate made of AlN with LED chips.
  • the electrical connection of the H a 1 b 1 eiter emi leaves with the submount is advantageously done by chip-level connection types, such as bonding (wire bonding, flip-chip bonding), etc., while the submount and the single LED advantageously by conventional connection types as soldering are electrically contacted with the carrier plate.
  • one or more submounts may be mounted on the carrier plate or one of the rigid carrier areas. In the presence of multiple semiconductor emitter they can radiate in the same color, z. For example, you know what enables easy scalability of brightness.
  • the semiconductor emitters may, however, at least partially also have a different jet color, z.
  • a beam color of the light source can be tuned, and it can be set any color point.
  • semiconductor emitters of different jet color can produce a white mixed light.
  • OLEDs can be used.
  • other semiconductor light sources such as laser diodes can be used.
  • the heat sink can be used particularly advantageously with a lighting device which is designed as a retrofit lamp, in particular for replacing an incandescent lamp or fluorescent lamp.
  • the housing for the driver electronics forward, preferably continuously decreasing cross-section on.
  • This allows a streamlined design of the driver housing, which is easy to customize. This is especially true for an approximately zwiebiförmiges driver housing.
  • the cooling fin gaps i. the openings between two cooling fins, an approximately square cross-sectional area. This has proved to be particularly advantageous for the cooling, since in this case an advantageous compromise between flow resistance and free surfaces can be achieved.
  • FIG. 1 shows an oblique view of parts of a lighting device with a heat sink according to a first embodiment
  • FIG. 2 shows the parts of the lighting device according to the first embodiment shown in FIG. 1 in side view
  • FIG. 3 shows a sectional view along a section line A-A in rear view of the lighting device according to the first embodiment
  • FIG 4 shows a sectional view in view from behind analog to the view of FIG 3, a lighting device according to a second embodiment
  • FIG. 5 shows a sectional view in a rear view similar to the view from FIG. 3 and FIG. 4 of a lighting device according to a third embodiment
  • FIG. 6 shows a perspective view of a further embodiment of the invention.
  • FIG. 7 shows a sectional representation of the embodiment shown in FIG 6;
  • FIG. 8 shows a perspective view of a further embodiment of the invention.
  • FIG 9 shows a sectional view of the embodiment shown in FIG 8;
  • FIG. 10 shows a perspective view of a further embodiment of the invention.
  • FIG 11 shows a sectional view of the embodiment shown in FIG 10
  • FIG 13 shows a sectional view of the embodiment shown in FIG 12;
  • FIG. 15 shows a perspective view of a further embodiment of the invention
  • 16 shows a sectional view of the embodiment shown in FIG 15;
  • FIG. 17 shows a sectional illustration of a further embodiment of the invention.
  • FIG. 18 shows a sectional view along the line A-A of the embodiment of the invention shown in FIG. 17;
  • FIG. 20 shows a sectional view of the embodiment shown in FIG. 19;
  • FIG. 21 shows a detailed perspective view of a heat sink for the embodiment shown in FIG. 19;
  • FIG. 23 shows a plan view of the embodiment shown in FIG. 22;
  • FIG. 24 shows a cover plate of the embodiment shown in FIG. 22;
  • FIG 25 shows a perspective view of the embodiment shown in FIG 22;
  • FIG 26 shows a sectional view of another embodiment of the invention.
  • FIG 27 shows in plan view the embodiment shown in FIG 26
  • FIG. 28 shows a further sectional view Embodiment of the invention.
  • FIG 29 shows a side view of the embodiment shown in FIG 28.
  • FIG. 1 shows an oblique view and FIG. 2 shows a side view of parts of a lighting device R with a heat sink 1, a housing 2 for driver electronics and a cable duct 3, wherein the cable duct 3 connects an interior of the housing 2 with the heat sink 1.
  • the heat sink 1 has a front disc-shaped part 4, which has a rearwardly extending, concentric, cup-like recess 5.
  • the cup-like recess 5 has at its bottom a rearwardly extending, concentrically arranged nozzle-like opening 6.
  • At the back 7 of the disc 4 set vertically cooling fins 8 in the form of lamellar cooling fins.
  • the cooling fins 8 extend rearwardly in the direction of the longitudinal axis I of the heat sink 1 and to this angle symmetrically and rectilinearly radially.
  • the cooling fins 8 are connected to the disk 4 over their entire radial extent (without the recess 5), in order to allow effective heat conduction between the disk 4 and the cooling fins 8.
  • the light source (not shown) can be fixed directly or indirectly (eg via a submount and / or a printed circuit board) and in particular forwardly (in the direction of the longitudinal axis I) radiate.
  • the (lateral) inner edge or the inner edge 9 of the respective cooling rib 8 remains rectilinear and parallel to the longitudinal axis I, while the (laterally) outer edge 10 runs inwards (toward the longitudinal axis I); This reduces the cross-sectional area of the cooling fins 8 in the rearward direction (counter to the direction of the longitudinal axis I).
  • a form of an associated lamp R can be achieved, which can be used as a retrofit lamp for replacement a light bulb is suitable.
  • the cooling fins 8 are thus fixed with respect to the heat sink 1 only with its front side, namely on the disc 4, and otherwise project freely into the room (ie with its laterally inner edge 9, its laterally outer edge 10 and its rear edge 11 surround them or by adjacent cooling fins 8 each limited cooling rib gaps 13 (see FIG. 3) a common, concentric cavity 12.
  • the Heat sink 1 By providing the cavity 12 and in that the cavity 12 laterally (perpendicular to the longitudinal axis I) is open to the outside, is the Heat sink 1 in the middle permeable to air currents
  • the air flows can be generated in a horizontal position of the heat sink 1 through the warm cooling fins 8, which heat the air in their vicinity and thus through the cavity 12 to rise (chimney effect) 12 thus prevents stagnation of warm air in a horizontal position of the heat sink 1 and the cooling fins 8.
  • the cooling ribs 8 are stuck in the housing 2 for the driver electronics, in slots not shown here, whereby the housing 2 is mechanically fixed to the heat sink 1.
  • the connection between the housing 2 and the heat sink 1 can be fixed (for example by gluing or ratcheting) or be detachable.
  • the cable channel 3 concentrically leads to the longitudinal axis I of the housing 2 through the Cavity 12 for nozzle 6. In this case, its cross-sectional area is so small that an air flow through the cavity 12 is not hindered.
  • the cable channel 3 is made of plastic for weight saving and cost-effective production.
  • FIG. 3 shows a section through the heat sink 1 and the cable duct 3 from FIG. 1 and FIG. 2 along the section line AA in view from behind.
  • the flat cooling fins 8 are aligned in cross section with respect to the longitudinal axis I radially and angularly symmetrical. Each of the cooling fins 8 has an equal distance from the longitudinal axis. Each two adjacent cooling ribs 8 delimit a respective cooling rib space 13 or 13a to 13j. By the spacing of the cooling ribs 8 of the concentrically arranged about the longitudinal axis I cavity 12 is formed, which opens to each of the cooling fin intermediate spaces 13 out. When heating the heat sink 1 and thus the cooling fins 8, the air in the cooling fin gaps 13 is heated by heat radiation or convection.
  • the heated air would then simply rise (with respect to the radial direction) on the outside from the respective cooling rib space 13, 13b without the cavity 12, but without a chimney effect.
  • the air would also accumulate in the outside downwardly opening cooling fin gaps 13f-13i.
  • an internal air duct between the cooling fin intermediate spaces 13 and 13a-13j is formed. Consequently, in the downwardly opening cooling fin intermediate spaces 13f-13i, heated air can ascend through the cavity 12 acting as an air channel, in particular into a cooling rib space 13a-13d which opens upwards on the outside and can flow outward through it.
  • FIG 4 shows a section through a further heat sink 14 according to a further embodiment and a cable channel 3 in an analogous to FIG 3 representation.
  • the heat sink 14 now has, in cross-section, further outwardly directed cooling ribs 15 which, however, do not run in a straight line to the outside, but rather curved.
  • FIG 5 shows a section through a heat sink 16 according to yet another embodiment and a cable channel 3 in an analogous to FIG 3 and FIG 4 representation.
  • the heat sink 16 now has two different sets of cooling fins 17, 18, wherein the cooling fins 17, 18 of the two sets with respect to the longitudinal axis I each angular symmetry, radially rectilinear and spaced formed, however, the cooling fins 18 of second set are angularly offset and further spaced from the first set of cooling fins 17, the second set of cooling fins 18 also projecting partially into the associated fin racks 13 of the first set of fins 17.
  • the pattern of all the cooling fins 17,18 is further angularly symmetrical with respect to the longitudinal axis I.
  • FIG. 6 shows a perspective view of a further embodiment of the invention.
  • the heat sink 20 according to the invention is installed in a so-called retrofit lamp 21, ie a lamp that can be used by its Aubsildung, in particular its base 22, their electrical connection values and their external shape as a replacement of a conventional light bulb.
  • Retrofit lamps for example, have one of the common screw base such as E27 or E14 or bayonet base such as BA 15 or GU10 and are typically to those for incandescent or Low-pressure discharge lamps typical supply voltages (usually in a range between 12 V and 240 V) connected, even if the light sources used therein have a different terminal voltage.
  • the retrofit lamp 21 has a screw base 22, a housing 2 for a driver electronics 23 and a heat sink 20.
  • disk-shaped part 4 of the heat sink 20 is a circuit board 24 with a designed as a light emitting diode (LED) 25 light source and an enveloping bulb 26 which surrounds the light source and so on the one hand, the appearance of the retrofit lamp 21 matches that of a conventional incandescent lamp, but also serves as a diffuser for the light emanating from the LED 25.
  • LED light emitting diode
  • FIG. 7 which shows the retrofit lamp 21 from FIG. 6 in a perspective sectional view
  • the cooling fins 27 of the heat sink 20 enclose the cable channel 3.
  • the heat sink 20 is fastened to the housing 2 by means of a screw connection, wherein the screw holes 28 in FIG individual, widened executed cooling fins 27 are arranged.
  • the thermal contact area between heat sink 20 and housing 2 is small in this construction, so that the heating of the housing 2 and thus the driver electronics 23 is minimized.
  • FIG. 8 shows a perspective view of another embodiment of the invention, in which a heat sink 29 according to the invention is installed in a retrofit lamp 30.
  • the retrofit lamp 30 comprises analogous to the previous embodiment, a base 22, a housing 2, a heat sink 29 and a circuit board 24 with LEDs 25, which are enclosed by an enveloping bulb 26.
  • an elongated cable channel 3 instead of an elongated cable channel 3, only one passage opening 31 is provided, into which a cable channel 32 integrally formed on the housing 2 is introduced.
  • the cable channel 32 has a smaller one This allows an exchange of air between the space located behind the disc-shaped part 4 of the heat sink 29 space with the space located in front of the disc-shaped part 4 of the heat sink 29 below the enveloping bulb 26 space.
  • the enveloping piston 26 also has one or more ventilation openings 33, which allow an exchange of air with the environment. If the retrofit lamp 30 is thus operated in the vertical burning position, ie as shown in FIGS. 8 and 9, or rotated by 180, an air flow along the lamp longitudinal axis I is made possible with a pronounced chimney effect. Thus, the retrofit lamp 30 in virtually any burning position optimized cooling.
  • FIG. 10 shows a perspective view of another embodiment of a retrofit lamp 34.
  • This retrofit lamp 34 is intended to replace a conventional reflector lamp, i. a lamp in which by means of a reflector, a directed light emission is made to the front.
  • the reflector lamp in turn comprises a base 22, a housing 2 for a driver electronics 23, a heat sink 35 according to the invention and a circuit board 24 with LEDs 25.
  • the board 24 is protected by a cover 36 from touching, which, however, has no optical function in the present embodiment, and in the area of the LEDs 25 is broken.
  • other embodiments are of course conceivable.
  • FIG. 11 is a perspective sectional view of the retrofit lamp 34.
  • a cable channel 3 is provided which is arranged off-center in this embodiment. This may be advantageous for reasons of a simple wiring in the drive electronics 23 and / or the circuit board 24 and fluidic reasons, in particular if the cable channel 3, as in the present embodiment is part of a cooling fin 37.
  • 12 shows a further exemplary embodiment of a retrofit lamp 38 according to the invention with a heat sink 39 according to the invention, in which the heat sink 39 is arranged on a housing 2 for driver electronics 23 and on the heat sink 39 a circuit board 24 with LED 25 not shown here for better illustration and an enveloping bulb 26 are attached.
  • a cable channel 3 is arranged, which connects the housing 2 with the circuit board 24.
  • the housing 2 for the driver electronics 23 has on its outer side a rib structure, which merges into the cooling ribs 41 of the heat sink 39.
  • the cooling fins 42 of the housing 2 allow both a cooling of the driver electronics 23 and a mechanical stiffening of the housing 2. Furthermore, the flow behavior of the cooling air and thus the cooling effect is improved by the virtually seamless transition to the cooling fins 41 of the heat sink 39.
  • FIG. 13 shows a perspective sectional view of the retrofit lamp 38 from FIG. 12.
  • the heat sink 39 is connected to the housing 2 via a snap connection 43 in that the housing 2 has snap hooks 44, which engage in corresponding latching elements 45 in the heat sink 39.
  • the housing 2 comprises a base body 46 and a lid 47, wherein the lid 47 and the cable channel 3 are made in one piece.
  • the lid 47 is fixed by the heat sink 39 via a shoulder 48 on the cable channel 3 in the lamp longitudinal direction I, whereby the assembly of the retrofit lamp 38 is simplified.
  • the enveloping piston 26 is attached via a snap connection 49 of locking lugs 50 and a snap edge 51 on the heat sink 39.
  • the retrofit lamp 52 is analogous to the retrofit lamp 38 according to FIGS 12 and 13 executed, but here is the cable channel 3 and the lid 47 of the housing 2 of a translucent material executed. As a result, a portion of the light from the space between the heat sink 39 and outer bulb 26 is directed to the rear, whereby the illumination in the rear of the retrofit lamp 52 is improved.
  • the light guiding function can be influenced by the selection of the material for the cable channel 3 as well as by its treatment, for example a reflective coating, preferably on the inside, whereby the cables are no longer visible and the light is emitted to the outside better.
  • FIG. 15 shows a perspective view of another embodiment of a retrofit lamp 53 with base 22, housing 54, heat sink 55 and enveloping piston 26.
  • the front cover 56 of the housing 54 is formed zwieiförmig and is thus gradually with a continuously decreasing cross-section in the cable channel 57 via. A sharp edge in the transition from a side wall of the housing 2 to the lid 47, as in the previous embodiments is avoided.
  • FIG. 16 shows a sectional view of the retrofit lamp 53 shown in FIG. 15.
  • the driver electronics 58 are adapted in their outside contour to the shape of the housing 54, wherein particularly heat-sensitive components 61 are preferably arranged in the vicinity of the base 22, while temperature-insensitive components 62 are in the range the transition to the cable channel 57 are arranged, since there occur higher temperatures during operation.
  • the heat-sensitive components 61 are also thermally conductive, for example by means of a thermal paste, connected to the housing 54 in order to further improve the cooling of these components 61.
  • the housing 54 is provided with projections 63.
  • FIG. 17 and FIG. 18 show a further retrofit lamp 64 with base 22, housing 2 for a driver electronics 23 with cover 47 and cable duct 3, heat sink 65, circuit board 24 with LED 25 and enveloping bulb 26 in a sectional illustration.
  • the basic structure is similar to that of the retrofit lamps 21, 38, 52 of FIGS. 6, 12 and 14.
  • the driver electronics 23 are also cooled by means of cooling ribs 66 which are fastened to the cover 47 and the cable channel 3 or integral therewith are executed. This can be seen particularly clearly in FIG. 18, which shows a section along the line AA in FIG.
  • the cooling ribs 66 of the housing 2 are arranged alternately with the cooling ribs 67 of the heat sink 65, resulting in particularly favorable flow conditions for effective cooling of driver electronics 23 and light sources 25.
  • the cooling fins 66 of the housing 2 are not pulled through to the back 7 of the disk-shaped part 4 of the heat sink 65 but end behind this, which improves the ventilation and in particular the cooling of the heat sink 65.
  • the cross section of the cooling ribs 66 of the housing 2 decreases with increasing distance from the housing 2, which also causes the ventilation in the front region of the heat sink 65 and thus the cooling of the lamps 25th improved.
  • FIG. 19 shows a perspective view of another retrofit lamp 68.
  • the heat sink 69 in the central part has a circumferential ring 70, which connects the cooling ribs 71 with one another.
  • this serves to increase the mechanical stability of the heat sink 69, but on the other hand, in particular, increases the effective surface area of the heat sink 69.
  • the air flow in comparable annular heat sinks is only very small the ring 70 does not unduly disturb the flow of air, but the increased surface area provides a better cooling effect.
  • the lateralderiüüenzischen spaces 72 in the heat sink 69 have an approximately square cross-sectional shape.
  • FIG. 20 shows a section through the retrofit lamp 68 which is similar in construction to the lamp of FIGS. 12 and 13, i. the heat sink 69 is fixed by means of a snap connection 43 on the housing 2 and holds on the cooling channel 3, the lid 47th
  • FIG. 21 shows the heat sink 69 of the retrofit lamp 68 from FIGS. 19 and 20 in a perspective view.
  • the disk-shaped part 73 of the heat sink 69 is not carried out continuously in this embodiment but has openings 74. These facilitate, on the one hand, the manufacture of the heat sink 69, in particular by means of a casting process, since this facilitates the shaping of the heat sink 69 from a mold. If the diameter of the board 24 is sufficiently small or the board 24 has suitable openings, through these openings 74 can also take place an exchange of air with the space between board 24 and outer envelope 26, so that the cooling of the LEDs 25 is improved. This is especially true when the piston 26th Has ventilation openings analogous to the example in Figures 8 and 9.
  • the 22 shows as a section through a retrofit lamp 75, which is designed as a replacement for a reflector lamp.
  • the retrofit lamp 75 is shown in a perspective view.
  • the retrofit lamp 75 comprises a GUIO socket 76, a housing 77, a heat sink 78 and a circuit board 24 with LEDs 25.
  • the LEDs 25 are provided with an optic 79 and arranged behind a cover 80 in a recess 81 of the heat sink 78.
  • the cover 80 has in its center a ventilation opening 82, which communicates via a ventilation channel 83 and an opening 84 in the heat sink 78 with the recess 85 between the cooling fins 86 of the heat sink 78 in connection.
  • the heat sink 78 is similar in its basic structure, in particular the heat sink 35 of FIG 11, since the, not visible here, cable channel 3 between the housing 77 and board 24 is disposed in a cooling fin 86.
  • the housing 77 similar to the housing 54 in FIG. 15, has a continuously decreasing forward cross section, which likewise leads to a favorable flow profile of the cooling air.
  • the cooling fins 86 of the heat sink 78 reach forward and close flush with the cover 80 from.
  • FIG. 23 shows in plan view the retrofit lamp 75 shown in FIG. 22 with the LEDs 25, the optics 79 and the ventilation opening 82 in the cover disk 80.
  • FIG 26 shows a sectional view of another retrofit lamp 87, which is formed in the rear part similar to the retrofit lamp 75 shown in FIGS 22 to 26.
  • no ventilation channel 83 is provided here from the cover plate 80 to the opening 84 of the heat sink 90, but rather a centered cover plate 88 is used and ventilation openings 89 are provided in the edge region.
  • the cooling air also flows directly via the circuit board 24 and the LEDs 25, which is why they are cooled particularly well.
  • vents 89 may be part of the cover 88 itself or, as shown in FIG 27, the diameter of the cover 88 may be smaller than the diameter of the recess 90 of the heat sink 91 and the cover 88 will be held by brackets 92.
  • FIG. 28 and FIG. 29 show a further embodiment of a retrofit lamp 93, which is similar to that shown in FIGS. 22 to 27.
  • the heat sink 94 in the region laterally of the board 24 ventilation openings 95 sucked through the - as indicated by the arrows - especially in the illustrated vertical installation position air through the chimney effect and after flowing through the opening 84 in the heat sink 94 via the rear fin interspaces 96 between the cooling fins 97 of the heat sink 94 is discharged again. It is advantageous in this case that the air sweeps over the board 24 and experiences, in contrast to the voirherigen embodiment, only a simple deflection.
  • cooling fins can be shaped differently, z. B. freely formed.
  • the air duct for connecting at least two cooling rib intermediate spaces may not include a cavity, but may be formed, for example, by openings in the cooling fins.
  • the heat sink can be embodied, for example, as a bent sheet metal part, as described in DE 10 2009 052 930.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Geometry (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

La présente invention concerne un corps de refroidissement (1) pour un dispositif d'éclairage (R) qui présente plusieurs nervures de refroidissement (8), des nervures de refroidissement adjacentes (8) limitant à chaque fois un espace intermédiaire de nervures de refroidissement (13) et présentant au moins un canal d'air (12) pour la connexion d'au moins deux espaces intermédiaires de nervures de refroidissement (13).
EP10704345A 2009-02-09 2010-02-08 Corps de refroidissement pour un dispositif d'éclairage Withdrawn EP2394096A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009008096.1A DE102009008096B4 (de) 2009-02-09 2009-02-09 Kühlkörper für eine Leuchtvorrichtung
PCT/EP2010/051512 WO2010089397A1 (fr) 2009-02-09 2010-02-08 Corps de refroidissement pour un dispositif d'éclairage

Publications (1)

Publication Number Publication Date
EP2394096A1 true EP2394096A1 (fr) 2011-12-14

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US (1) US8814397B2 (fr)
EP (1) EP2394096A1 (fr)
JP (1) JP2012517659A (fr)
CN (1) CN102308147A (fr)
DE (1) DE102009008096B4 (fr)
WO (1) WO2010089397A1 (fr)

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Publication number Publication date
WO2010089397A1 (fr) 2010-08-12
US20120014098A1 (en) 2012-01-19
DE102009008096B4 (de) 2016-10-27
DE102009008096A1 (de) 2010-08-19
JP2012517659A (ja) 2012-08-02
US8814397B2 (en) 2014-08-26
CN102308147A (zh) 2012-01-04

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