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WO2013036539A2 - Improved led luminaire cooling system - Google Patents

Improved led luminaire cooling system Download PDF

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Publication number
WO2013036539A2
WO2013036539A2 PCT/US2012/053807 US2012053807W WO2013036539A2 WO 2013036539 A2 WO2013036539 A2 WO 2013036539A2 US 2012053807 W US2012053807 W US 2012053807W WO 2013036539 A2 WO2013036539 A2 WO 2013036539A2
Authority
WO
WIPO (PCT)
Prior art keywords
heat
cooling system
luminaire
leds
lamp
Prior art date
Application number
PCT/US2012/053807
Other languages
French (fr)
Other versions
WO2013036539A3 (en
Inventor
Pavel Jurik
Josef Valchar
Original Assignee
Robe Lighting, Inc.
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 Robe Lighting, Inc. filed Critical Robe Lighting, Inc.
Priority to EP12788653.9A priority Critical patent/EP2753876B1/en
Publication of WO2013036539A2 publication Critical patent/WO2013036539A2/en
Publication of WO2013036539A3 publication Critical patent/WO2013036539A3/en

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50Cooling arrangements
    • F21V29/70Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/71Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks using a combination of separate elements interconnected by heat-conducting means, e.g. with heat pipes or thermally conductive bars between separate heat-sink elements
    • F21V29/717Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks using a combination of separate elements interconnected by heat-conducting means, e.g. with heat pipes or thermally conductive bars between separate heat-sink elements using split or remote units thermally interconnected, e.g. by thermally conductive bars or heat pipes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50Cooling arrangements
    • F21V29/56Cooling arrangements using liquid coolants
    • F21V29/59Cooling arrangements using liquid coolants with forced flow of the coolant
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50Cooling arrangements
    • F21V29/60Cooling arrangements characterised by the use of a forced flow of gas, e.g. air
    • F21V29/67Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by the arrangement of fans
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21WINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/40Lighting for industrial, commercial, recreational or military use
    • F21W2131/406Lighting for industrial, commercial, recreational or military use for theatres, stages or film studios
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING 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
    • F21Y2115/00Light-generating elements of semiconductor light sources
    • F21Y2115/10Light-emitting diodes [LED]

Definitions

  • the present invention generally relates to an automated luminaire, specifically to a luminaire utilizing a high intensity LED light source. More specifically to a system and method for cooling the light source.
  • 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.
  • 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.
  • incandescent lamps, high intensity discharge (HID) lamps, plasma lamps and LEDs as light sources in such a luminaire.
  • Many of these light sources need cooling to maintain them within correct 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.
  • One or more fans 41 are blowing ambient air across lamp 30 to cool it.
  • 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.
  • FIG. 5 illustrates a prior art cooling system for an automated luminaire using LEDs 54 as the light source.
  • LEDs 54 are mounted to a heat conducting substrate board 56 which, in turn, is mounted to a heat sink 52. Heat from the LEDs passes through the substrate board 56 into the heat sink 52 from where it is dissipated into the surrounding air. The heat dissipation from the heat sink may be improved by adding a fan to the system blowing air across heat sink 52.
  • Such systems often require large heat sinks to dissipate the heat from LEDs and are constrained by the necessity to site the heat sink adjacent to the LEDs. This may be particularly difficult when it is desired to position the LEDs 54 within a reflector 57 as illustrated in Figure 6.
  • the optical and physical requirements of reflector 57 are often in conflict with the thermal requirements of heat sink 52 and force engineering compromise in the design of one or the other.
  • FIG. 7 illustrates a further prior art system where three arrays of LEDs 54a, 54b and 54c are arranged around dichroic beam combiners 58 and 59. Each array of LEDs is mounted to heat conducting substrate boards 56a, 56b and 56c which, in turn, are mounted to heat sinks 52a, 52b and 52c.
  • the need and use of multiple LED arrays 54a, 54b and 54c further limits the space available for heat sinks 52a, 52b and 52c and constrains their size and thus efficiency.
  • a further disadvantage of all the illustrated prior art cooling systems is that the heat dissipated through heat sinks is always close to the heat source itself - the LEDs. It would be advantageous if the heat could be dissipated at a distant point to the LEDs.
  • FIGURE 1 illustrates a typical automated lighting system
  • FIGURE 2 illustrates a prior art system
  • FIGURE 3 illustrates a typical prior art lamp cooling system in an automated luminaire
  • FIGURE 4 illustrates a prior art lamp cooling system
  • FIGURE 5 illustrates a prior art cooling system
  • FIGURE 6 illustrates a prior art cooling system
  • FIGURE 7 illustrates a prior art cooling system
  • FIGURE 8 illustrates an embodiment of an improved luminaire cooling system
  • FIGURE 9 illustrates a further embodiment of the luminaire cooling system of
  • 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 luminaire, specifically to a luminaire utilizing a high intensity LED light source and the cooling systems contained therein.
  • FIG. 8 illustrates an embodiment of the invention utilizing a high-powered LED array.
  • LED array 54 is mounted to a heat conducting substrate board 56 which in turn is mounted to first heat exchanger 62.
  • First heat exchanger 62 contains a thermal transfer coil through which is passed a thermal transmission liquid.
  • a transmission liquid was chosen with a boiling point outside the range of operating temperature of the system, with a low coefficient of thermal expansion, a high capacity to absorb heat.
  • Heat from LEDs 54 passes through heat conducting substrate 56 to first heat exchanger 62.
  • the thermal transmission liquid picks up heat from first heat exchanger 62.
  • Pump 64 circulates 63 the thermal transmission liquid around pipes 61 to second heat exchanger 66 which is being cooled by fan 68 and air flow 65.
  • Second heat exchanger 66 may be sited remotely from the first heat exchanger 62 and thus remotely from LEDs 54. Second heat exchanger 66 is not constrained in size and position by the optical requirements of the LEDs 54 and thus may be sited advantageously in an area with good access for cool, ambient air. Second heat exchanger may also be larger than first heat exchanger 62 and may use a large, slow speed, fan 68 which may operate at a low noise level.
  • the use of an active pump 64, as opposed to a non-pumped heat-pipe cooling system, ensures that the cooling system is not orientation dependent and will operate at any orientation of the system.
  • the connecting pipes 61 and 67 may be solid pipes or flexible pipes of metal or high temperature rubbers or plastics depending on the systems design.
  • the connecting pipes 61 and 67 in some embodiments may pass through the rotating joints of the pan and tilt mechanism of the automated luminaire. For these designs high temperature flexible materials are desirable.
  • LEDs 54 may be a densely packed array of LEDs and may all be of a single color, such as white, or may be an array of different colors such as red, green, blue or red, green, blue and white or red, green, blue, amber and white or other color mixes as well known in the art.
  • the invention may be used in any optical design of luminaire which may be automated or conventional, including but not limited to, spot lights, wash lights and beam lights. Such designs may use lenses such as Fresnel lenses or arrays of lenses.
  • Automated luminaires using the invention may contain optical devices including but not limited to gobos, color mixing systems, rotating gobos, iris, prisms, beam shapers, variable frost, effects systems and moving reflectors to provider hot-spot control.
  • the thermal transmission fluid and pump may be replaced with a phase change heat pump system using a volatile refrigerant and compressor and evaporator coils in place of the first and second heat exchangers.
  • the invention is not so limited and the light output from the optical system may be imaging where a focused or de focused 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 fan 68 and pump 64 accordingly.
  • master control circuit 70 receives input 76 of temperature sensors (not shown) near the LEDs 54 and input 75 of temperature senses of the effluent from heat exchanger 66 and controls the speed and operation of pump 64 via control signal 74 and fan 68 via control signal 72. Further sensors may be used to sense temperatures at multiple locations in the 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 LEDs 54 to control the speed of pump 64 and fan 68.
  • the cooling system may respond to this by reducing fan and pump speeds to a level commensurate with the power level being provided to LED module 54.
  • the pump and fan speeds may also be controlled based on the temperature input from the various sensors or the differential of temperatures across sensors.
  • the pump and fan speeds may be controlled through commands received over the communication link 14 shown in Figure 1. Such 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)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

Described is an improved cooling system for luminaires. More specifically a cooling system where the heat is carried away from the heat generation light source via a first heat exchanger to a second separated heat exchanger via a contained fluid loop.

Description

IMPROVED LED LUMINAIRE COOLING SYSTEM
RELATED APPLICATIONS
[0001] This application is a full utility patent application claiming priority of US provisional patent application(s) 61/531,066 filed 5 September 2011.
TECHNICAL FIELD OF THE INVENTION
[0002] The present invention generally relates to an automated luminaire, specifically to a luminaire utilizing a high intensity LED light source. More specifically to a system and method for cooling the light source.
BACKGROUND OF THE INVENTION
[0003] 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. [0004] Figure 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). 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.
[0005] Figure 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.
[0006] 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. Many of these light sources need cooling to maintain them within correct 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. One or more fans 41 are blowing ambient air across lamp 30 to cool it.
[0007] Figure 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. In this design 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.
[0008] None of these prior art systems work well with a light source comprising an array of high powered LED emitters. Such arrays cover a wide area, rather than the single point light source provided by prior art lamps, and are not contained within a single reflector. Designs using simple fans blowing over the LED arrays may work but are noisy and large.
[0009] Figure 5 illustrates a prior art cooling system for an automated luminaire using LEDs 54 as the light source. LEDs 54 are mounted to a heat conducting substrate board 56 which, in turn, is mounted to a heat sink 52. Heat from the LEDs passes through the substrate board 56 into the heat sink 52 from where it is dissipated into the surrounding air. The heat dissipation from the heat sink may be improved by adding a fan to the system blowing air across heat sink 52. Such systems often require large heat sinks to dissipate the heat from LEDs and are constrained by the necessity to site the heat sink adjacent to the LEDs. This may be particularly difficult when it is desired to position the LEDs 54 within a reflector 57 as illustrated in Figure 6. The optical and physical requirements of reflector 57 are often in conflict with the thermal requirements of heat sink 52 and force engineering compromise in the design of one or the other.
[0010] Figure 7 illustrates a further prior art system where three arrays of LEDs 54a, 54b and 54c are arranged around dichroic beam combiners 58 and 59. Each array of LEDs is mounted to heat conducting substrate boards 56a, 56b and 56c which, in turn, are mounted to heat sinks 52a, 52b and 52c. The need and use of multiple LED arrays 54a, 54b and 54c further limits the space available for heat sinks 52a, 52b and 52c and constrains their size and thus efficiency.
[0011] A further disadvantage of all the illustrated prior art cooling systems is that the heat dissipated through heat sinks is always close to the heat source itself - the LEDs. It would be advantageous if the heat could be dissipated at a distant point to the LEDs.
[0012] There is a need for a cooling system for high powered LED arrays in an automated luminaire which offers improved cooling of such arrays in a compact system with good control of the noise emitted by the cooling system and with the heat dissipation occurring remote to the LEDs. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] For a more complete understanding of the present invention and the advantages thereof, reference is now made to the following description taken in conjunction with the accompanying drawings in which like reference numerals indicate like features and wherein:
[0014] FIGURE 1 illustrates a typical automated lighting system;
[0015] FIGURE 2 illustrates a prior art system;
[0016] FIGURE 3 illustrates a typical prior art lamp cooling system in an automated luminaire;
[0017] FIGURE 4 illustrates a prior art lamp cooling system;
[0018] FIGURE 5 illustrates a prior art cooling system;
[0019] FIGURE 6 illustrates a prior art cooling system;
[0020] FIGURE 7 illustrates a prior art cooling system;
[0021] FIGURE 8 illustrates an embodiment of an improved luminaire cooling system, and;
[0022] FIGURE 9 illustrates a further embodiment of the luminaire cooling system of
Figure 8.
DETAILED DESCRIPTION OF THE INVENTION
[0023] 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.
[0024] The present invention generally relates to an automated luminaire, specifically to a luminaire utilizing a high intensity LED light source and the cooling systems contained therein.
[0025] Figure 8 illustrates an embodiment of the invention utilizing a high-powered LED array. LED array 54 is mounted to a heat conducting substrate board 56 which in turn is mounted to first heat exchanger 62. First heat exchanger 62 contains a thermal transfer coil through which is passed a thermal transmission liquid. In one embodiment a transmission liquid was chosen with a boiling point outside the range of operating temperature of the system, with a low coefficient of thermal expansion, a high capacity to absorb heat. Heat from LEDs 54 passes through heat conducting substrate 56 to first heat exchanger 62. The thermal transmission liquid picks up heat from first heat exchanger 62. Pump 64 circulates 63 the thermal transmission liquid around pipes 61 to second heat exchanger 66 which is being cooled by fan 68 and air flow 65. The cooled thermal transmission fluid then passes back to the first heat exchanger 62 via pipes 67 to complete the circuit. Second heat exchanger 66 may be sited remotely from the first heat exchanger 62 and thus remotely from LEDs 54. Second heat exchanger 66 is not constrained in size and position by the optical requirements of the LEDs 54 and thus may be sited advantageously in an area with good access for cool, ambient air. Second heat exchanger may also be larger than first heat exchanger 62 and may use a large, slow speed, fan 68 which may operate at a low noise level. The use of an active pump 64, as opposed to a non-pumped heat-pipe cooling system, ensures that the cooling system is not orientation dependent and will operate at any orientation of the system. This is critical with automated luminaires as the luminaire may be operated in any orientation. The connecting pipes 61 and 67 may be solid pipes or flexible pipes of metal or high temperature rubbers or plastics depending on the systems design. The connecting pipes 61 and 67 in some embodiments may pass through the rotating joints of the pan and tilt mechanism of the automated luminaire. For these designs high temperature flexible materials are desirable.
[0026] Although the system illustrated uses a reflector 57 to direct the light output from LEDs 54 the invention is not so limited and light collection and direction may be through any means as known in the art including but not limited to, TIR lenses, elliptical reflector, parabolic reflector, spherical reflector, light pipes. LEDs 54 may be a densely packed array of LEDs and may all be of a single color, such as white, or may be an array of different colors such as red, green, blue or red, green, blue and white or red, green, blue, amber and white or other color mixes as well known in the art.
[0027] The invention may be used in any optical design of luminaire which may be automated or conventional, including but not limited to, spot lights, wash lights and beam lights. Such designs may use lenses such as Fresnel lenses or arrays of lenses.
Automated luminaires using the invention may contain optical devices including but not limited to gobos, color mixing systems, rotating gobos, iris, prisms, beam shapers, variable frost, effects systems and moving reflectors to provider hot-spot control.
[0028] In further embodiments of the invention the thermal transmission fluid and pump may be replaced with a phase change heat pump system using a volatile refrigerant and compressor and evaporator coils in place of the first and second heat exchangers. [0029] Although the figures shown here are of embodiments with imaging optics that are capable of producing projected images from gobo wheels and other pattern producing optical devices, the invention is not so limited and the light output from the optical system may be imaging where a focused or de focused 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.
[0030] In yet further embodiments, as illustrated in Figure 9, 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 fan 68 and pump 64 accordingly. In Figure 9 master control circuit 70 receives input 76 of temperature sensors (not shown) near the LEDs 54 and input 75 of temperature senses of the effluent from heat exchanger 66 and controls the speed and operation of pump 64 via control signal 74 and fan 68 via control signal 72. Further sensors may be used to sense temperatures at multiple locations in the 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 LEDs 54 to control the speed of pump 64 and fan 68. For example, if the user commands the LEDs 54 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 and pump speeds to a level commensurate with the power level being provided to LED module 54. The pump and fan speeds may also be controlled based on the temperature input from the various sensors or the differential of temperatures across sensors. [0031] In other embodiments the pump and fan speeds may be controlled through commands received over the communication link 14 shown in Figure 1. Such commands may be transmitted over protocols including but not limited to industry standard protocols DMX512, RDM, ACN, Artnet, MIDI and/or Ethernet.
[0032] While the disclosure has been described with respect to a limited number of embodiments, those skilled in the art, having benefit of this disclosure, will appreciate that other embodiments may be devised which do not depart from the scope of the disclosure as disclosed herein. The disclosure has been described in detail, it should be understood that various changes, substitutions and alterations can be made hereto without departing from the spirit and scope of the disclosure.

Claims

WHAT IS CLAIMED IS: Claims could relate to:
1 . A luminaire comprising:
An LED array which generates light and heat;
Heat conductive element(s) to conduct the heat from the lamp into a first heat exchanger;
A second remotely sited heat exchanger where the heat is dissipated.
PCT/US2012/053807 2011-09-05 2012-09-05 Improved led luminaire cooling system WO2013036539A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12788653.9A EP2753876B1 (en) 2011-09-05 2012-09-05 Improved led luminaire cooling system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201161531066P 2011-09-05 2011-09-05
US61/531,066 2011-09-05

Publications (2)

Publication Number Publication Date
WO2013036539A2 true WO2013036539A2 (en) 2013-03-14
WO2013036539A3 WO2013036539A3 (en) 2013-06-20

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WO (1) WO2013036539A2 (en)

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WO2016009089A1 (en) * 2014-07-18 2016-01-21 Arnold & Richter Cine Technik Gmbh & Co. Betriebs Kg Headlight with an led light source

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JP4726872B2 (en) * 2006-09-27 2011-07-20 シーシーエス株式会社 Reflective lighting device
TWM320642U (en) * 2007-03-19 2007-10-11 Jiun-Fu Liou Heat dissipation structure of a streetlamp
JP5180525B2 (en) * 2007-07-02 2013-04-10 三洋電機株式会社 Projection display device
FR2940679B1 (en) * 2008-12-31 2016-06-10 Finan Trading Company ELECTROLUMINESCENT DIODE LIGHTING SYSTEM.
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Publication number Priority date Publication date Assignee Title
WO2016009089A1 (en) * 2014-07-18 2016-01-21 Arnold & Richter Cine Technik Gmbh & Co. Betriebs Kg Headlight with an led light source
CN106716004A (en) * 2014-07-18 2017-05-24 阿诺尔德和里希特奇纳技术有限公司及企业两合公司 Headlight with an led light source

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WO2013036539A3 (en) 2013-06-20
EP2753876A2 (en) 2014-07-16
EP2753876B1 (en) 2019-11-06

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