EP2753877B1 - Led-kühlungssystem - Google Patents

Led-kühlungssystem Download PDF

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Publication number
EP2753877B1
EP2753877B1 EP12772163.7A EP12772163A EP2753877B1 EP 2753877 B1 EP2753877 B1 EP 2753877B1 EP 12772163 A EP12772163 A EP 12772163A EP 2753877 B1 EP2753877 B1 EP 2753877B1
Authority
EP
European Patent Office
Prior art keywords
airflow
heat exchanger
fins
led array
array module
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.)
Active
Application number
EP12772163.7A
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English (en)
French (fr)
Other versions
EP2753877A1 (de
Inventor
Pavel Jurik
Josef Valchar
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.)
Robe Lighting sro
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Robe Lighting sro
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Publication of EP2753877A1 publication Critical patent/EP2753877A1/de
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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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/60—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air
    • F21V29/67—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by the arrangement of fans
    • F21V29/677—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by the arrangement of fans the fans being used for discharging
    • 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
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/40—Lighting for industrial, commercial, recreational or military use
    • F21W2131/406—Lighting for industrial, commercial, recreational or military use for theatres, stages or film studios
    • 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 generally relates to an automated luminaire, specifically to luminaires utilizing high intensity LED light source(s). More specifically to system(s) and method(s) for cooling the light source(s).
  • Luminaires with automated and remotely controllable functionality are well known in the entertainment and architectural lighting markets. Such products are commonly used in theatres, television studios, concerts, theme parks, nightclubs and other venues.
  • a typical product will provide control over the pan and tilt functions of the luminaire allowing the operator to control the direction the luminaire is pointing and thus the position of the light beam on the stage or in the studio. This position control is often done via control of the luminaire's position in two orthogonal rotational axes usually referred to as pan and tilt.
  • Many products provide control over other parameters such as the intensity, color, focus, beam size, beam shape and beam pattern.
  • the beam pattern is often provided by a stencil or slide called a gobo which may be a steel, aluminum or etched glass pattern.
  • the products manufactured by Robe Show Lighting such as the ColorSpot 700E are typical of the art.
  • FIG. 1 illustrates a typical multiparameter automated luminaire system 10.
  • These systems commonly include a plurality of multiparameter automated luminaires 12 which typically each contain on-board a light source (not shown), light modulation devices, electric motors coupled to mechanical drives systems and control electronics (not shown).
  • each luminaire In addition to being connected to mains power either directly or through a power distribution system (not shown), each luminaire is connected in series or in parallel via data link 14 to one or more control desks 15.
  • the automated luminaire system 10 is typically controlled by an operator through the control desk 15. Consequently, to affect this control both the control desk 15 and the individual luminaires typically include electronic circuitry as part of the electromechanical control system for controlling the automated lighting parameters.
  • FIG. 2 illustrates a prior art automated luminaire 12 utilizing a high intensity discharge (HID) lamp.
  • An HID lamp 21 contains an arc or plasma light source 22 which emits light. The emitted light is reflected and controlled by reflector 20 through an aperture or imaging gate 24.
  • the resultant light beam may be further constrained, shaped, colored and filtered by optical devices 26 which may include dichroic color filters, dimming shutters, and other optical devices well known in the art.
  • the final output beam may be transmitted through output lenses 28 and 31 which may form a zoom lens system.
  • Typically luminaires employing a HID type lamp employ a hot mirror 46 which is a window which transmits visible light and reflects non-visible energy radiating energy.
  • Such prior art automated luminaires use a variety of technologies as the light sources for the optical system. For example it is well known to use incandescent lamps, high intensity discharge (HID) lamps, plasma lamps and LEDs as light sources in such a luminaire.
  • incandescent lamps, high intensity discharge (HID) lamps, plasma lamps and LEDs as light sources in such a luminaire.
  • HID high intensity discharge
  • WO 2011/076219 A1 discloses an automated luminaire using LED light sources. Many of these light sources need cooling to maintain them within acceptable operating temperature limits.
  • Figure 3 illustrates one example of a prior art lamp light source 30 and its major components.
  • Lamp 30 may comprise a sealed quartz envelope 37 with two contained electrodes 34 and 35 which are typically manufactured of tungsten. In operation an electrical arc is struck between electrodes 34 and 35 thus creating high temperature plasma and producing light.
  • the specific mechanism and chemistry for the light production is beyond the scope of this patent and does not relate to the novelty of the invention.
  • the luminaire designer must develop a cooling system which maintains the desired temperatures for the components of lamp 30.
  • a further constraint is the need for any cooling systems to avoid interfering with the reflector 31 or with any of the light beams emitted from the lamp or bounced from reflector 31.
  • FIG 4 illustrates a further prior art cooling system for an automated luminaire which seeks to maintain correct temperatures of the lamp 30 in particular the lamp envelope 37 and lamp pinches 32 and 33.
  • one or more fans 41 are directed into the reflector 31 in such a manner as to direct external cool air around the lamp 30.
  • the cooling air may be directed directly on to the lamp as illustrated or may be directed at an angle so as to form a vortex of air around the lamp.
  • FIGURES Preferred embodiments of the present invention are illustrated in the FIGURES, like numerals being used to refer to like and corresponding parts of the various drawings.
  • the present invention generally relates to an automated luminaires, specifically toluminaires utilizing a high intensity LED light source and the lamp cooling systems contained therein.
  • FIG. 5 illustrates an automated luminaire 100 using an embodiment of the invention utilizing a high powered LED array.
  • Automated luminaire 100 contains a light source module 102 which emits light through optical devices 150 and 152 which may include gobo wheels, rotating gobo wheels, effects wheels, irises, frost systems, dichroic color filters, dimming shutters, and other optical devices well known in the art.
  • the final output beam may be transmitted through output lenses 154 and 156 which may form a zoom lens system.
  • Light source module 102 comprises an LED array module 104 with light output aperture 105.
  • LED array module 104 is surrounded by a pair of side heat exchanger subsystems: a first side heat exchanger subsystem 106 with associated fins 113 and cooling fan 114, and a second heat exchanger subsystem 116 with associated fins 109 and fan 110.
  • FIG 8 also illustrates a combined multi-surface heat exchanger subsystem 107 with associated fins (not shown in Figure 6 ), and fans 108 and 112.
  • Fans 108, 110, 112 and 114 may direct air through their associated heat exchanger subsystems.
  • Fans 108, 110, 112 and 114 may be low speed fans such that the noise produced is low.
  • fans 108, 110, 112 and 114 are positioned such that airflow is directed 140 and 144 into the heat exchanger subsystems 106, 116, 107 which also serve to baffle and attenuate the fan noise.
  • the air flow 140, 144 into the heat exchanger subsystems 106, 116 107 results in airflow 142 146 (airflow out of subsytems 116 and 107 not shown in Figure 6 ).
  • Figure 7 illustrates one of the side heat exchangers 106 with its fins 113 and fan 104.
  • FIG. 8 illustrates an LED array module of an embodiment of the invention.
  • LED array module 104 contains high-powered LED arrays and optical combining systems which direct light through light output aperture 105.
  • LED arrays may be mounted within LED array module 104 on the internal sides of faces 120, 122, 124, 126 and 128. Faces 120, 122, 124, 126 and 128 are thermally conductive surfaces designed to transfer heat from the internal arrays to the outside of the LED array module from where it is transferred to the heat exchangers.
  • FIG 9 is a top view illustration of the airflow 150 generated by fan 114 across one of the fins 113 of the heat exchanger subsystem illustrated in Figure 7 .
  • the airflow enters the fins as turbulent 152 and depending on the speed of the fan 114 and volume of airflow 150 the turbulent flow 152 converts to laminar flow 154. Since the fins 113 are tapered at the exit end 151, the air on the tap end 115 begins to curve away from the light source 104 and create a Bernoulli effect 156 158 drawing the air increasingly away from the light source 104.
  • the benefits of the turbulence at the entry and at higher speeds is more efficient heat transfer to the air.
  • the benefits of the laminar flow at lower speeds is quieter operation.
  • the turbulent flow is more efficient the cooling at the light output 105 end 160 of the light source increases the temperature differential at the output side 160 relative to the side 162 closer to the source surface 126 - encouraging wicking of heat in direction 164.
  • the efficiency of the turbulent flow may be offset by a greater temperature differential at the side 162 closer to the source surface 126.
  • FIG 10 illustrates the heat exchanger system illustrated in Figure 6 with the side heat exchanger subsystems removed - leaving the light source 104 and heat exchanger subsystem 107 including its fans 108 and 112.
  • FIG 11 illustrates a heat exchanger of an embodiment of the invention.
  • Thermally conductive surfaces 134 are in intimate contact with a thermally conductive surface of the LED array module such as surface 128 of Figure 8 .
  • the transferred heat is then transferred into radiant fins 132.
  • Radiant fins 132 and thermally conductive surfaces 134 may be constructed of copper, aluminum or other material with high thermal conductivity.
  • the radiant fins 132 extend throughout the heat exchanger 140 and include three thermally conductive surfaces, each of which is in contact with a different thermally conductive surface of the LED array module.
  • the majority of radiant fins 132 are enclosed by cover 130, with the exception of incoming air apertures for the fans 108 and 112, and exiting air aperture 136.
  • Cover 130 thus forms an air duct directing cool ambient air 140 in to the heat exchanger through fans 108 and 112. This air flows over and between the radiant fins 132 constrained by cover 130. Heat is transferred to the air from the radiant fins and finally hot air 142 exits the heat exchanger at 136. Exiting hot air 142 may be directed outside the automated luminaire.
  • the ducting of the air from the fans through the ducted heat exchanger serves to both cool the LED module, and baffle and silence the fans.
  • a 'C' shaped heat exchanger in contact with three surfaces of the LED module is illustrated here, however the invention is not so limited and any number of surfaces of the LED module may be in contact with the heat exchanger. Although two fans 108 and 112 are illustrated here the invention is not so limited and any number of fans may be utilized.
  • Figure 12 illustrates a heat exchanger of an embodiment of the invention with the top and side of the ducting covers removed. It can be seen how the radiant fins 132 extend around the inside of the heat exchanger to provide a large surface area for heat transfer. Heat is transferred from conductive surfaces 134 into the radiant fins 132 as previously described.
  • Figure 13 is a top down illustration of the airflow 170 across the fins 132 of the heat exchanger subsystem illustrated in Figure 10 . Higher incidence of turbulent flow areas are illustrated 172 and 174. As are Bernoulli force effects 176 due to the exit flow dynamics at the airflow exit 136.
  • the invention is not so limited and the light output from the optical system may be imaging where a focused or defocused image is projected, or non-imaging where a diffuse soft edged light beam is produced, without detracting from the spirit of the invention.
  • the invention may be used as an LED array cooling system with optical systems commonly known as spot, wash, beam or other optical systems known in the art.
  • the cooling system may be actively controlled using feedback from the lamp control system and temperature probes measuring the ambient temperature in and around the lamp and/or lamp house and controlling the speed of fans 108, 110, 112 and 114 accordingly.
  • Separate sensors may be used to sense temperatures at each LED array and/or the LED module and/or other locations inside and outside the luminaire house.
  • Such systems may also use the power provided to LED module 104 to control the speed of cooling fans. For example, if the user commands the lamp to dim down to 20% output through the control console and link as shown in Figure 1 then the cooling system may respond to this by reducing fan speeds to a level commensurate with the power level being provided to LED module 140.
  • the commensurate level of fan speed is determined as a function of the heat power to heat generation curve of the source taken together with the cooling to fan speed curve(s) of for an internal external temperature differential.
  • the fan speed may also be controlled based on the temperature input from the various sensors or the differential of temperatures across sensors.
  • the lamp cooling and fan speeds may be controlled through commands received over the communication link 14 shown in Figure 1 .
  • commands may be transmitted over protocols including but not limited to industry standard protocols DMX512, RDM, ACN, Artnet, MIDI and/or Ethernet.

Landscapes

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

Claims (4)

  1. Leuchte, die Folgendes umfasst:
    ein LED-Array-Modul (104), das Licht und Wärme erzeugt;
    einen oder mehrere Wärmetauscher (106, 107, 116), die Rippen (113, 132) umfassen, wobei jeder Wärmetauscher einen Luftstromeingang angrenzend an ein zu kühlendes LED-Array-Modul (104) und einen Luftstromausgang (151, 136) aufweist und wobei jeder Wärmetauscher von dem Luftstromeingang zu dem Luftstromausgang (151) verjüngt ist;
    einen oder mehrere Lüfter (108, 110, 112, 114), die angepasst sind, um einen Luftstrom (140-154, 170) über eine der Rippen hinweg zu treiben; und
    wobei der Lüfter (114), der Wärmetauscher (106, 107, 116) und die Rippen (113) derart konfiguriert sind, dass der Lüfter (114) einen Luftstrom erzeugt, der als turbulenter Strom (152, 172, 174) in den Luftstromeingang eines Wärmetauschers eintritt, und an dem Luftstromausgang (151, 136) in einen laminaren Strom (154) umgewandelt wird, wobei der turbulente Strom (152, 172, 174) eine gesteigerte Kühleffizienz nahe dem Luftstromeingang bereitstellt und der laminare Strom (154) verringerte Luftstromgeräusche an dem Luftstromausgang (151, 136) bereitstellt.
  2. Leuchte nach Anspruch 1, wobei das LED-Array-Modul mehrere LED-Arrays und optische Kombinationssysteme umfasst, die Licht durch eine Lichtausgangsöffnung (105) lenken.
  3. Leuchte nach Anspruch 2, wobei die LED-Arrays auf Innenseiten der Oberflächen (120, 122, 124 und 126) des LED-Array-Moduls (104) angebracht sind, wobei die Oberflächen thermisch leitfähig sind, um Wärme von den innen angebrachten LED-Arrays an die Außenseite des LED-Array-Moduls für eine Übertragung an den Luftstromeingang von Rippen des einen oder der mehreren Wärmetauscher (106, 107, 116) durch einen oder mehrere Lüfter (108, 110, 112, 114) zu übertragen, wobei ein Durchleiten der Luft von den Lüftern durch den einen oder die mehreren Wärmetauscher die LED-Arrays kühlt.
  4. Leuchte nach einem der vorhergehenden Ansprüche, wobei jeder Wärmetauscher derart konfiguriert ist, dass der Luftstrom, der durch die Rippe (113) strömt, sich von dem LED-Array-Modul (104) weg krümmt, wodurch ein Bernoulli-Effekt (156, 158), aufgrund der Austrittsstromdynamik an dem Luftstromausgang (151, 136) erstellt wird.
EP12772163.7A 2011-09-05 2012-09-05 Led-kühlungssystem Active EP2753877B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201161531059P 2011-09-05 2011-09-05
PCT/US2012/053805 WO2013036538A1 (en) 2011-09-05 2012-09-05 Led cooling system

Publications (2)

Publication Number Publication Date
EP2753877A1 EP2753877A1 (de) 2014-07-16
EP2753877B1 true EP2753877B1 (de) 2020-11-04

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EP12772163.7A Active EP2753877B1 (de) 2011-09-05 2012-09-05 Led-kühlungssystem

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EP (1) EP2753877B1 (de)
CN (1) CN103890489A (de)
WO (1) WO2013036538A1 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2927579B1 (de) * 2014-04-04 2020-02-12 Harman Professional Denmark ApS Kühlmodul für led-leuchte
CN107006108B (zh) * 2014-10-01 2019-09-03 罗布照明公司 改进的自动照明装置中的灯色温稳定性
CN105333408B (zh) * 2015-12-03 2019-02-19 广州市浩洋电子股份有限公司 一种舞台灯光源模块热学***
CN107959869B (zh) * 2017-12-05 2020-07-21 北海华源电子有限公司 装有便于散热的机顶盒保护罩的平板电视机
CN107920216B (zh) * 2017-12-05 2020-05-05 北海华源电子有限公司 装有带散热装置的机顶盒保护罩的平板电视机
CN107948558B (zh) * 2017-12-05 2020-07-21 北海华源电子有限公司 带有高散热机顶盒保护罩的平板电视机
CN107749962B (zh) * 2017-12-05 2020-07-21 北海华源电子有限公司 具有可散热机顶盒保护罩的平板电视机
CN109634043B (zh) * 2019-02-22 2020-08-28 中国科学院福建物质结构研究所 一种激光发射单元以及激光投影光源

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DE102007043961C5 (de) * 2007-09-14 2017-04-06 Automotive Lighting Reutlingen Gmbh Beleuchtungseinrichtung mit Halbleiterlichtquelle
KR101253821B1 (ko) * 2007-12-07 2013-04-12 오스람 게엠베하 히트싱크와 히트싱크를 포함하는 조명장치
TW201116982A (en) * 2009-11-13 2011-05-16 Sunonwealth Electr Mach Ind Co Cooling module
WO2011076219A1 (en) * 2009-12-21 2011-06-30 Martin Professional A/S Cooling module for multiple light source projecting device
EP2339234A1 (de) * 2009-12-23 2011-06-29 Micronel AG Kühlvorrichtung
DE202011000220U1 (de) * 2011-01-28 2011-04-07 Keiling, Ulf LED-Leuchte, insbesondere für Aquarien, Terrarien oder dergleichen

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Also Published As

Publication number Publication date
CN103890489A (zh) 2014-06-25
EP2753877A1 (de) 2014-07-16
WO2013036538A1 (en) 2013-03-14

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