EP2487411A1 - Corps de refroidissement pour lampe à DEL - Google Patents

Corps de refroidissement pour lampe à DEL Download PDF

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Publication number
EP2487411A1
EP2487411A1 EP12167142A EP12167142A EP2487411A1 EP 2487411 A1 EP2487411 A1 EP 2487411A1 EP 12167142 A EP12167142 A EP 12167142A EP 12167142 A EP12167142 A EP 12167142A EP 2487411 A1 EP2487411 A1 EP 2487411A1
Authority
EP
European Patent Office
Prior art keywords
sleeve part
heat sink
led
channel
sleeve
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.)
Granted
Application number
EP12167142A
Other languages
German (de)
English (en)
Other versions
EP2487411B1 (fr
Inventor
Gerald Ladstätter
Angelo Favarolo
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.)
Zumtobel Lighting GmbH Austria
Original Assignee
Zumtobel Lighting GmbH Austria
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 Zumtobel Lighting GmbH Austria filed Critical Zumtobel Lighting GmbH Austria
Publication of EP2487411A1 publication Critical patent/EP2487411A1/fr
Application granted granted Critical
Publication of EP2487411B1 publication Critical patent/EP2487411B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00—Globes; Bowls; Cover glasses
    • 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
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
    • F21V23/007—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array enclosed in a casing
    • F21V23/009—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array enclosed in a casing the casing being inside the housing of the lighting device
    • 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
    • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
    • F21V29/89—Metals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the invention relates to a heat sink for an LED luminaire (LED: light-emitting diode), which comprises a luminous means with at least one LED and an LED luminaire with such a heat sink.
  • LED light-emitting diode
  • the invention has for its object to provide an alternative, particularly effective heatsink for an LED light and a corresponding LED light.
  • a heat sink for an LED luminaire, which comprises a luminous means with at least one LED.
  • the heat sink has a first sleeve part for forming a first channel extending inside the first sleeve part for removing air, which is generated by an operation of the LED light is heated.
  • the heat sink has a second sleeve part, which is arranged surrounding the first sleeve part, wherein the first sleeve part and the second sleeve part are arranged such that between the first sleeve part and the second sleeve part, a second channel for removing the air is formed.
  • the heat sink also has at least one further sleeve part, which is arranged surrounding the second sleeve part such that at least one further channel for removing the air is formed between the at least one further sleeve part and the second sleeve part. This allows a further increase in the effectiveness of heat dissipation.
  • the first sleeve part has a first tubular section which is rotationally symmetrical about an axis of symmetry and the second sleeve part has a second tubular section, which is likewise rotationally symmetrical about the axis of symmetry.
  • the heat sink further comprises at least one connecting rib, which connects the first sleeve part with the second sleeve part, and preferably - with respect to the axis of symmetry - in the radial direction.
  • the connecting rib can advantageously extend up to this.
  • the surface is increased for heat dissipation.
  • a particularly effective conduction of heat to an outer surface of the second sleeve part or the at least one further sleeve part allows; This is particularly advantageous if the outer surface of the second sleeve body or of the at least one further sleeve part forms an outer surface of the cooling body.
  • the first channel has an uninterrupted annular cross-section.
  • its ring-shaped cross-section is not characterized by a
  • the heat sink further comprises a central part, which is provided for thermal contacting with the lighting means, wherein the central part is arranged at a front end region of the first sleeve part.
  • a central part which is provided for thermal contacting with the lighting means, wherein the central part is arranged at a front end region of the first sleeve part.
  • the central part is at least partially projecting forward over a front end portion of the second sleeve part. This makes it possible that light emitted by the illuminant radiated unhindered by the heat sink in the front half-space and also air coming in from an outside of the lamp coming to cool effectively flows into the second channel.
  • the second sleeve part extends further to the rear and / or further forward than the first sleeve part.
  • the two partial air flows, which form in the first and in the second channel are brought together again before leaving the heat sink or are formed by splitting only after the air has entered the interior of the heat sink.
  • the first sleeve part and the second sleeve part are formed in one piece. This allows a particularly effective heat conduction within the heat sink.
  • the connecting ribs and / or the central part are preferably part of this piece.
  • the piece consists of aluminum. For example, it may be formed as a solid die-cast body.
  • the heat sink has the at least one further sleeve part, it is advantageous to form it out of a further piece;
  • the further piece is made of plastic.
  • This is in terms of permissible Surface temperature of advantage, because this is higher for the plastic than aluminum. This is due to the fact that the sensation of pain, for example, at a surface temperature of 70 degrees Celsius in plastic is much lower than at 70 degrees hot aluminum.
  • plastic is generally not suitable for temperatures as high as aluminum, in the outer region of the heat sink considered here, correspondingly lower temperatures can be expected.
  • an outer surface of the heat sink can generally be made lighter and better in appearance and aesthetics than an outer surface made of aluminum.
  • an LED luminaire which comprises a luminous means with at least one LED and which has a heat sink according to the invention.
  • the LED lamp further comprises a driver housing for receiving a driver for operating the LED, wherein the driver housing has a surface region which forms an inner boundary of the first channel. This allows a particularly good removal of heat, which arises during operation of the lamp by the driver.
  • the driver housing is connected to the surface of the heat sink.
  • a particularly good thermal connection between the heat sink and the LED can be achieved if the LED is connected directly or only via a circuit board to the central part of the heat sink.
  • Fig. 1 is a longitudinal section of an LED lamp according to the invention sketched according to a first embodiment.
  • Fig. 2 shows a perspective view of the in Fig. 1 shown light, partially cut open.
  • the LED lamp has a heat sink according to the invention according to a first embodiment.
  • the LED lamp may be designed to be suitable for replacing a conventional light bulb. It may therefore have the shape of a conventional bulb according to its external appearance and be equipped with a corresponding thread 40 which serves for mechanical and electrical connection with a corresponding conventional socket. Furthermore, the LED lamp may accordingly have a transparent cover 42, which is modeled on a glass bulb of the conventional light bulb.
  • the LED lamp has a light source which comprises at least one LED 2.
  • the LED lamp has a driver 34, which is arranged protected in a driver housing 30.
  • heat is generated by the LED 2 and also by the driver 34. This heat must be removed as effectively as possible in order to enable effective operation of the LED lamp and the longest possible life of the LED 2.
  • the heat sink is used.
  • the heat sink is preferably formed as a solid, one-piece die-cast aluminum part and comprises a first sleeve part 4, which serves to form a first channel 6, which is formed extending within the first sleeve part 4.
  • the first sleeve part 4 may have an inwardly pointing, preferably circular-cylindrical surface region which forms an outer boundary of the first channel 6.
  • the first channel 6 may be formed annularly around the driver housing 30 in cross-section.
  • the driver housing 30 may for this purpose have an outwardly facing surface region 32, which forms an inner boundary of the first channel 6.
  • the first channel 6 is used to remove air, which is heated by an operation of the LED light, ie in particular by the light source or the LED 2 and / or the driver 34. Accordingly, the first channel 6 is designed in such a way that an air flow through the first channel 6 can be formed during operation of the LED lamp due to the resulting heat. Therefore, the first channel 6 is preferably designed such that it can cause a chimney effect for this air flow in this sense.
  • the first channel 6 has a front opening 44 and a rear opening 46, so that air can flow into and out of the first channel 6.
  • a front opening 44 and a rear opening 46 so that air can flow into and out of the first channel 6.
  • the driver housing 30 has a surface region 32, which forms a planar inner boundary of the first channel 6.
  • the surface region 32 can be advantageously cylindrical in terms of flow, in particular circular-cylindrical. In this way, a part of the driver housing 30 directly adjoins the first channel 6, so that a direct or direct heat transfer from the driver housing 30 to the first channel 6 is made possible.
  • a further surface region 54 of the driver housing 30 is preferably connected directly to the heat sink in a planar manner, so that an effective direct heat transfer from the driver housing 30 to the heat sink is also made possible.
  • the heat sink on a second sleeve part 8 which is arranged surrounding the first sleeve part 6.
  • the first sleeve part 6 and the second sleeve part 8 are arranged such that between these two parts 6, 8, a second channel 10 is formed, which also serves for the removal of the heated air.
  • the second channel 10 also has a front opening 50 and a rear opening 52.
  • the first sleeve part 4 preferably has a first tubular portion 12 which is rotationally symmetrical about an axis of symmetry S, for example, circular cylindrical formed.
  • a the region along the axis of symmetry S, over which the first tubular section 12 of the first sleeve part 4 extends, is designated by a .
  • the second sleeve part 8 may have a second tubular portion 14 which is rotationally symmetrical to the same axis of symmetry S.
  • a correspondingly symmetrical design is aerodynamically advantageous.
  • this surface portion 32 of the driver housing 30 is rotationally symmetrical, for example circular cylindrical about the symmetry axis S is formed.
  • the second tubular portion 14 may also be circular cylindrical or as in the embodiment shown the case - have a diameter, the changes along the axis of symmetry S, for example, towards the front preferably continuously increases.
  • the second sleeve part 8 can - fluidly advantageous - project beyond the first sleeve part 6 to the front and / or to the rear.
  • the second sleeve part 8 extends further to the rear than the first sleeve part 4, the "partial air flow" through the first channel 6 and the “partial air flow” through the second channel 10 are merged, before the merged from these two partial air flows back air from the heat sink flows. If the first sleeve part 4 does not extend as far forward as the second sleeve part 8, the air flowing into the cooling body from the front is divided into the two mentioned partial air flows only within the heat sink.
  • the first sleeve part 4 and the second sleeve part 8 are mechanically and thermally connected to each other by at least one connecting rib 16, preferably by a plurality of connecting ribs.
  • the connecting rib 16 is preferably formed radially with respect to the axis of symmetry S arranged. By such a connecting rib 16, the heat conduction to the second sleeve 8 is forced.
  • Further advantageously can be divided by the connecting ribs of the second channel 10 in - corresponding to the number of connecting ribs - a plurality of sub-channels, which - considered normal to the symmetry axis S - for example, have approximately trapezoidal cross-sections.
  • the sub-channels may also be designed having an approximately square or circular cross-section.
  • the first channel 6, however, is preferably not interrupted, so rather - viewed normal to Symmetriechase S - ring-shaped continuously formed.
  • the connecting rib 16 thus extends in the direction of the axis of symmetry S only to the first sleeve part 4. This also allows for the case in particular an effective flow formation through the first channel 6, in which the LED light is aligned for operation such that the axis of symmetry S horizontally or approximately horizontally oriented.
  • the heat sink also has a central part 18, which is provided for thermal contact with the light source, ie in particular for thermal contacting with the LED 2.
  • the central part 18 is arranged at a front end region 20 of the first sleeve part 4. It can be provided that a mechanical and thermal connection between the first sleeve part 4 and the central part 18 by a plurality of webs between the front end portion 20 of the first sleeve part 4 and the central part 18 is formed.
  • the front opening 44 can be formed between two of these webs; Preferably, a plurality of front openings are accordingly formed between a plurality of such webs, through which air, which originates from an outer region of the LED lamp, can flow into the interior of the first channel 6.
  • the further surface region 54 of the driver housing 34 contacts the heat sink in a planar manner.
  • the central part 18 may be formed or arranged at least partially projecting forward over a front end portion 22 of the second sleeve part 8. As a result, a light output from the LED 2 is made possible in the front half-space, which is not hindered by the heat sink. In addition, in this way, the front opening 50 of the second channel 10 can make comparatively large, which in turn allows a comparatively strong air flow.
  • the LED 2 is connected directly or only via a circuit board with the central part 18.
  • the central part 18 has a surface region 60 which has a forward-facing normal, the LED 2 being arranged on this surface region 60.
  • the LED 2 may be positioned so that the symmetry axis S passes through the LED 2.
  • FIGS. 3 to 5 a second embodiment of an LED lamp according to the invention with a second embodiment of a heat sink according to the invention is shown. Unless stated otherwise, the statements on the first exemplary embodiment also apply analogously to the second exemplary embodiment. The reference numerals are used accordingly.
  • Fig. 3 shows one of the Fig. 1 appropriate representation
  • Fig. 4 one of the Fig. 3 corresponding side view
  • Fig. 5 shows one of the Fig. 2 corresponding representation.
  • a third channel 26 or chimney allows a further increase in the effectiveness of the heat dissipation.
  • the third sleeve part 24 can - in analogy to the first and the second sleeve part - have a third tubular portion, which in turn is formed rotationally symmetrical to the axis of symmetry S.
  • the connecting rib 16 or, the connecting ribs can advantageously extend radially outwards as far as the third sleeve part 24. As a result, a heat transfer to the third sleeve part 24 is supported.
  • the third sleeve part 24 may extend less far to the rear than the second sleeve part 8. It may also be formed further sleeve parts, which connect to the outside. It can be provided that the sleeve parts increasingly less extend with increasing distance from the axis of symmetry S to the rear.
  • FIGS. 6 to 8 that the FIGS. 3 to 5 show corresponding representations
  • a third embodiment is shown.
  • the above statements apply analogously.
  • the difference from the second embodiment is that the three channels 6, 10, 26 extend along the axis of symmetry S longer.
  • the heat sink along the axis of symmetry S has a longitudinal extent and in the transverse direction to a transverse extent, wherein the ratio of longitudinal extent to transverse extent between 4: 6 and 7: 6.
  • the longitudinal extent may be between 4 and 7 cm.
  • the heat sink is formed of two pieces, wherein the first piece, the main piece, the first sleeve part 4, the second sleeve part 8, which comprises at least one connecting rib 16 and the central part 18 and consists of aluminum.
  • the second piece comprises the third sleeve part 26 and is made of plastic. This is advantageous in terms of the permissible surface temperature because it is higher for plastic than for aluminum.
  • plastic is generally not suitable for the first and second sleeve parts because the air there can reach temperatures that make the use of plastic unsuitable.
  • Another advantage is the use of plastic for the outermost sleeve, because plastic is better suited than aluminum to form a visually appealing surface.
  • the outermost sleeve part can form an outer surface of the heat sink and / or the LED light and preferably made of plastic.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP12167142.4A 2009-10-30 2010-10-29 Corps de refroidissement pour lampe à DEL Active EP2487411B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009051373A DE102009051373A1 (de) 2009-10-30 2009-10-30 Kühlkörper für LED-Leuchte
EP10189368A EP2320137B1 (fr) 2009-10-30 2010-10-29 Corps de refroidissement pour lampe à DEL

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP10189368.3 Division 2010-10-29

Publications (2)

Publication Number Publication Date
EP2487411A1 true EP2487411A1 (fr) 2012-08-15
EP2487411B1 EP2487411B1 (fr) 2013-08-28

Family

ID=43302437

Family Applications (3)

Application Number Title Priority Date Filing Date
EP12167142.4A Active EP2487411B1 (fr) 2009-10-30 2010-10-29 Corps de refroidissement pour lampe à DEL
EP11184454.4A Active EP2407713B1 (fr) 2009-10-30 2010-10-29 Lampe à DEL dotée d'un corps de refroidissement
EP10189368A Active EP2320137B1 (fr) 2009-10-30 2010-10-29 Corps de refroidissement pour lampe à DEL

Family Applications After (2)

Application Number Title Priority Date Filing Date
EP11184454.4A Active EP2407713B1 (fr) 2009-10-30 2010-10-29 Lampe à DEL dotée d'un corps de refroidissement
EP10189368A Active EP2320137B1 (fr) 2009-10-30 2010-10-29 Corps de refroidissement pour lampe à DEL

Country Status (2)

Country Link
EP (3) EP2487411B1 (fr)
DE (1) DE102009051373A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5575715B2 (ja) * 2011-08-29 2014-08-20 日立アプライアンス株式会社 電球型照明装置
CN202303274U (zh) * 2011-10-11 2012-07-04 厦门市东林电子有限公司 一种led灯散热结构
DE102012205072A1 (de) * 2012-03-29 2013-10-02 Osram Gmbh Halbleiterlampe mit kühlkörper
CN104603534B (zh) * 2012-08-17 2018-08-07 飞利浦照明控股有限公司 具有分裂烟囱结构的散热结构
US10006621B2 (en) 2012-08-17 2018-06-26 Philips Lighting Holding B.V. Heat dissipation structure with splitted chimney structure
DE202013001144U1 (de) 2013-02-06 2013-03-20 Esd Electronic Service & Design Gmbh LED-Leuchtmittel
TWI558947B (zh) 2015-01-28 2016-11-21 Chai Kao Teh Multi-directional light bulb

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006118457A1 (fr) 2005-04-01 2006-11-09 Lemnis Lighting Ip Gmbh Dissipateur thermique, lampe et procede pour fabriquer un dissipateur thermique
WO2009084372A1 (fr) * 2007-12-28 2009-07-09 Sharp Kabushiki Kaisha Radiateur et dispositif d'éclairage
WO2009110683A2 (fr) * 2008-03-06 2009-09-11 화우테크놀러지주식회사 Système de ventilation de l'air chaud sans ventilateur pour un appareil d'éclairage del
US20090296387A1 (en) * 2008-05-27 2009-12-03 Sea Gull Lighting Products, Llc Led retrofit light engine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7758223B2 (en) * 2005-04-08 2010-07-20 Toshiba Lighting & Technology Corporation Lamp having outer shell to radiate heat of light source
US20090185380A1 (en) * 2008-01-17 2009-07-23 Ho Sung Tao LED Lamp with Heat Dissipating Configuration
DE202008013667U1 (de) * 2008-10-15 2008-12-18 Li, Chia-Mao Mehrschaliger Reflektorbecher

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006118457A1 (fr) 2005-04-01 2006-11-09 Lemnis Lighting Ip Gmbh Dissipateur thermique, lampe et procede pour fabriquer un dissipateur thermique
WO2009084372A1 (fr) * 2007-12-28 2009-07-09 Sharp Kabushiki Kaisha Radiateur et dispositif d'éclairage
WO2009110683A2 (fr) * 2008-03-06 2009-09-11 화우테크놀러지주식회사 Système de ventilation de l'air chaud sans ventilateur pour un appareil d'éclairage del
US20090296387A1 (en) * 2008-05-27 2009-12-03 Sea Gull Lighting Products, Llc Led retrofit light engine

Also Published As

Publication number Publication date
EP2320137A1 (fr) 2011-05-11
EP2407713B1 (fr) 2014-04-23
EP2407713A1 (fr) 2012-01-18
EP2487411B1 (fr) 2013-08-28
EP2320137B1 (fr) 2012-06-20
DE102009051373A1 (de) 2011-05-05

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