EP3620715A1 - Luminaire avec un dissipateur de chaleur - Google Patents

Luminaire avec un dissipateur de chaleur Download PDF

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Publication number
EP3620715A1
EP3620715A1 EP18193523.0A EP18193523A EP3620715A1 EP 3620715 A1 EP3620715 A1 EP 3620715A1 EP 18193523 A EP18193523 A EP 18193523A EP 3620715 A1 EP3620715 A1 EP 3620715A1
Authority
EP
European Patent Office
Prior art keywords
cover
light source
circuit board
luminaire according
heat
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Withdrawn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
EP18193523.0A
Other languages
German (de)
English (en)
Inventor
Karl-Heinz Schneider
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP18193523.0A priority Critical patent/EP3620715A1/fr
Publication of EP3620715A1 publication Critical patent/EP3620715A1/fr
Withdrawn legal-status Critical Current

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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
    • F21V5/00—Refractors for light sources
    • F21V5/007—Array of lenses or refractors for a cluster of light sources, e.g. for arrangement of multiple light sources in one plane
    • 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
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
    • F21V17/12—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by screwing
    • 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
    • F21V3/00—Globes; Bowls; 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
    • F21V31/00—Gas-tight or water-tight arrangements
    • F21V31/005—Sealing arrangements therefor
    • 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
    • F21Y2105/00—Planar light sources
    • F21Y2105/10—Planar light sources comprising a two-dimensional array of point-like light-generating elements
    • 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 lamp according to the preamble of patent claim 1.
  • Optical elements are required to achieve the desired radiation characteristics of a luminaire.
  • the optical elements direct the light from light sources, for example by means of a lens, a prism or other structures, in the desired direction, namely in the direction of radiation.
  • the light sources in particular LEDs, are often mounted on a circuit board, namely preferably soldered on, the circuit board being able to consist of different materials.
  • the circuit board preferably has heat-conducting materials such as aluminum or copper. This is because there is the technical problem of efficiently dissipating the heat developed by a light source.
  • a good thermal conductivity of heat-dissipating elements is an essential prerequisite for good heat dissipation.
  • the circuit board mentioned is therefore usually coupled to the heat sink with the lowest possible heat transfer to the heat sink.
  • a circuit board with light sources must be pressed evenly onto a heat-conducting film and thus indirectly onto the heat sink, so that constant heat dissipation occurs.
  • a disc that presses on optical elements introduces a reflective surface into an optical system, which negatively affects the optical efficiency of the optical system.
  • the invention is therefore based on the object of designing and developing a luminaire of the type mentioned at the outset in such a way that good heat dissipation from light sources is ensured, the emission characteristics of the light sources being disturbed as little as possible by the components which promote heat dissipation.
  • Reflections in particular total reflections, but also diffractions from particles that accumulate between the disk and the optical elements are avoided by a one-piece combination of a disk and the optical elements.
  • an optical element as an integral part of a cover, presses the circuit board against the heat-dissipating material without further disks being arranged downstream of a radiation surface in the radiation direction of the light source.
  • the cover protects the light source from being accessed, covers the interior of the luminaire in which the light source is arranged, and has the radiation surface which faces the atmosphere free of further transparent panes.
  • the cover could be formed in one piece and / or in the same material with several optical elements. As a result, all optical elements can be integrated in one piece in the cover.
  • the optical elements and the cover are preferably made of the same material, so only one material can be used to manufacture the cover.
  • LED Light Emitting Diode
  • LED stands for "Light Emitting Diode", namely light emitting diode.
  • a seal could be arranged between the cover and / or between a flat edge flange section of the cover and the heat sink. As a result, the interior of the lamp, in which the light sources are arranged, is protected from moisture and dirt.
  • the cover could be connected to the heat sink by a screw device, but also by a clamping device, and could be pressed against the circuit board and / or the light source.
  • the force with which the circuit board is pressed against the heat sink can be adjusted manually by means of a screwing device.
  • the degree of deformation of the heat-dissipating material can also be adjusted in this way.
  • a frame could be arranged above the cover, which has a recess that releases and / or makes accessible at least part of the radiation surface.
  • the frame can support edge areas, long sides and / or transverse side of the cover and press it against the heat sink.
  • the cutout preferably clears the radiation surface completely, so that the light from all light sources can be emitted into the atmosphere.
  • the radiation surface could have at least one prism, a groove and / or another light-directing means. In this way, light can be emitted in a preferred direction and / or with a preferred emission characteristic.
  • the radiation surface could be corrugated at least in sections and / or have domes. Each wave crest or dome forms a domed housing for a light source.
  • the radiation surface could also be flat or have linear structures, such as grooves.
  • the radiation surface could be flat or flat and be grooved.
  • a flat radiation surface ensures a stable structure of the cover.
  • the grooves ensure that the light from the light sources can be emitted expanded in the longitudinal direction.
  • the optical element could be designed as a lens, which is arranged on the side of the cover that faces away from the emission surface.
  • a lens can collect, expand, bundle and / or parallelize light from the light source
  • An optical element can be designed as a lens which forms a dome in the direction of the radiation surface, or the lens can open into a flat radiation surface.
  • the radiation surface can have grooves in parallel.
  • the cover could be assigned a reinforcement.
  • the reinforcement can strengthen thin areas of the cover, for example in a valley between two wave crests or domes. Wires or strips can be provided as reinforcement, which are incorporated in or cast into the cover.
  • the heat-dissipating material could be flexible and / or compressible. As a result, unevenness between two components, in particular between the circuit board and the heat sink, can be compensated or compensated for. Furthermore, the heat-dissipating material can be deformed and compressed in such a way that there is optimal heat conduction between the circuit board and the heat sink.
  • Fig. 1 shows a luminaire comprising at least one light source 3, which is arranged on a circuit board 4, a heat-dissipating material 5 being arranged between the circuit board 4 and a heat sink 1 and at least one optical element 2 being arranged downstream of the light source 3 in the direction of its radiation.
  • Fig. 1 shows that the lamp has at least one light source 3, at least one heat sink 1 for heat dissipation and at least one optical element 2 or more optical elements 2.
  • the optical element 2 is an integral part of a cover 2a, through which the circuit board 4 is pressed against the heat-dissipating material 5, the cover 2a protecting the light source 3 from access, covering the interior of the lamp in which the light source 3 is arranged and has a radiation surface 2b.
  • the optical elements 2 are used to press the circuit board 4 onto a heat-dissipating material 5, namely a compressible heat-conducting film.
  • An optical element 2 is designed such that it has sufficient stability to withstand the required clamping forces and to transmit these to the circuit board 4.
  • An optical element 2 is designed such that it rests on the circuit board 4 at various points in order to exert a uniform pressure on the circuit board 4.
  • Each optical element 2 is also designed in such a way that a desired lighting result, namely the emission characteristic, is achieved.
  • the cover 2a is therefore made in one piece and of the same material with a plurality of optical elements 2.
  • a plurality of light sources 3 are provided, which are designed as LEDs, with each light source 3 being one is assigned optical element 2, into which the light of the respective LED can be coupled.
  • the lamp has LEDs.
  • a luminaire that uses LED technology can be manufactured at particularly low cost.
  • a seal 6 is arranged between the cover 2a and between a flat edge flange section 2c of the cover 2a and the heat sink 1.
  • the interior of the lamp is preferably sealed watertight against the atmosphere.
  • the seal 6 and the compressible heat-conducting film 5 are dimensioned in such a way that the tightness of the lamp and sufficient heat conductivity are guaranteed.
  • the cover 2a is connected to the heat sink 1 by a screw device 7 and can be pressed against the circuit board 4.
  • the size and stability of an optical element 2 allow the lamp to be closed with the seal 6 and with a clamping or screwing device 7.
  • a frame 9 is arranged above the cover 2a, which has a recess 10 which releases the radiation surface 2b and makes it accessible.
  • the radiation surface 2b is at least partially corrugated and has domes 11.
  • the lower boundaries 12 between two domes 11 press against the circuit board 4.
  • the optical element 2 can have different shapes in order to implement the desired lighting technology. It is conceivable that an optical element 2 has a flat structure, a linear structure, a prism-like structure, a lens-like structure or combinations of these structures.
  • Fig. 3 shows that the cover 2a is assigned a reinforcement 8. It is also conceivable to introduce reinforcing structures in order to increase the stability of the optical elements 2 in order to be able to exert the necessary pressure on the circuit board 4.
  • Fig. 4 shows below with the aid of a further cover 2a 'that a further radiation surface 2b' is flat and is provided with grooves 13.
  • the grooves are arranged in parallel and extend over the entire radiation surface 2b '.
  • the grooves extend in the transverse direction over the radiation surface 2b '.
  • Fig. 4 shows above on the basis of the further cover 2a 'that the optical elements 2 are designed as lenses, which are arranged on the side of the cover 2a' which faces away from the radiation surface 2b '.
  • the lenses are separated from one another by boundaries 12 which can press against the circuit board 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
EP18193523.0A 2018-09-10 2018-09-10 Luminaire avec un dissipateur de chaleur Withdrawn EP3620715A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP18193523.0A EP3620715A1 (fr) 2018-09-10 2018-09-10 Luminaire avec un dissipateur de chaleur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18193523.0A EP3620715A1 (fr) 2018-09-10 2018-09-10 Luminaire avec un dissipateur de chaleur

Publications (1)

Publication Number Publication Date
EP3620715A1 true EP3620715A1 (fr) 2020-03-11

Family

ID=63556236

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18193523.0A Withdrawn EP3620715A1 (fr) 2018-09-10 2018-09-10 Luminaire avec un dissipateur de chaleur

Country Status (1)

Country Link
EP (1) EP3620715A1 (fr)

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7182627B1 (en) 2006-01-06 2007-02-27 Advanced Thermal Devices, Inc. High illumosity lighting assembly
EP1182396B1 (fr) 2000-08-22 2009-10-14 Koninklijke Philips Electronics N.V. Luminaire basé sur l'émission lumineuse de diodes électroluminescentes
JP2010027615A (ja) 2009-09-18 2010-02-04 Ccs Inc 検査用光照射装置
US20110103059A1 (en) * 2009-10-29 2011-05-05 Industrial Technology Research Institute Hermetic light-emitting device
US20160003454A1 (en) * 2014-07-04 2016-01-07 Shanghai Yuanming Lighting Technology Co., Ltd. Led lens assemblies, led modules and led light fixtures
EP3070396A1 (fr) * 2015-03-13 2016-09-21 Hella KGaA Hueck & Co. Module d'éclairage
KR101667902B1 (ko) * 2016-04-25 2016-10-20 한국광기술원 장방형의 광원을 구비한 조명모듈
WO2017054091A1 (fr) * 2015-10-02 2017-04-06 Led Roadway Lighting Ltd. Ensemble moteur léger sans outil pour appareils d'éclairage de rue à del
US20170114993A1 (en) * 2014-04-04 2017-04-27 Lg Innotek Co., Ltd. Lighting module and lighting apparatus including same
EP2484970B1 (fr) 2011-02-08 2017-11-08 LED Expert Participatie B.V. Luminaire, en particulier pour éclairage à DEL
US20170370553A1 (en) * 2016-06-24 2017-12-28 Cree, Inc. Light fixture and optic with light-transmissive shield

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1182396B1 (fr) 2000-08-22 2009-10-14 Koninklijke Philips Electronics N.V. Luminaire basé sur l'émission lumineuse de diodes électroluminescentes
US7182627B1 (en) 2006-01-06 2007-02-27 Advanced Thermal Devices, Inc. High illumosity lighting assembly
JP2010027615A (ja) 2009-09-18 2010-02-04 Ccs Inc 検査用光照射装置
US20110103059A1 (en) * 2009-10-29 2011-05-05 Industrial Technology Research Institute Hermetic light-emitting device
EP2484970B1 (fr) 2011-02-08 2017-11-08 LED Expert Participatie B.V. Luminaire, en particulier pour éclairage à DEL
US20170114993A1 (en) * 2014-04-04 2017-04-27 Lg Innotek Co., Ltd. Lighting module and lighting apparatus including same
US20160003454A1 (en) * 2014-07-04 2016-01-07 Shanghai Yuanming Lighting Technology Co., Ltd. Led lens assemblies, led modules and led light fixtures
EP3070396A1 (fr) * 2015-03-13 2016-09-21 Hella KGaA Hueck & Co. Module d'éclairage
WO2017054091A1 (fr) * 2015-10-02 2017-04-06 Led Roadway Lighting Ltd. Ensemble moteur léger sans outil pour appareils d'éclairage de rue à del
KR101667902B1 (ko) * 2016-04-25 2016-10-20 한국광기술원 장방형의 광원을 구비한 조명모듈
US20170370553A1 (en) * 2016-06-24 2017-12-28 Cree, Inc. Light fixture and optic with light-transmissive shield

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