Cooling module for LED light fixture

Patent metadata

Field	Value
Publication number	US-10072834-B2
Application number	US-201514678896-A
Country	US
Kind code	B2
Filing date	Apr 3, 2015
Priority date	Apr 4, 2014
Publication date	Sep 11, 2018
Grant date	Sep 11, 2018

Abstract

Various embodiments relate to a cooling module for cooling a plurality of LEDs that includes a heat sink having a LED side sand a cooling side arranged at opposite sides of the heat sink. The LEDs arranged on the LED side and a first flow channel and second cooling channel are arranged adjacent to each other at the cooling side. The cooling module comprises a first blower and a second blower respectively configured to blow cooling air in a first flow direction through the first flow channel in a second flow direction through the second flow channel, where the first flow direction and the second flow direction being opposite each other. Certain embodiments also related to the light fixture comprising such cooling module and approaches for cooling a plurality of LEDs.

First claim

The invention claimed is:

1. A cooling module for a light fixture that includes a plurality of LEDs that generate light, said cooling module comprising:
a heat sink comprising a LED side and a cooling side, where said cooling side being opposite said LED side and wherein said plurality of LEDs are arranged on a PCB at said LED side; and
a first blower and a second blower, wherein at least one of the first blower and the second blower is adapted to blow cooling air to said cooling side,
wherein said heat sink comprises a first linear flow channel arranged at said cooling side and a second linear flow channel arranged at said cooling side, said first flow channel and said second flow channel being arranged adjacent to each other at said cooling side,
wherein said first blower is configured to blow cooling air in a first flow direction substantially parallel to the PCB through said first flow channel, and said second blower is configured to blow cooling air in a second flow direction substantially parallel to the PCB through said second flow channel, said first flow direction and said second flow direction being opposite to each other, and the cooling air in each flow channel cooling several of the plurality of LEDs, and
wherein said first blower is arranged at a first angle in relation to said LED side of said heat sink, and said second blower is arranged at a second angle in relation to said LED side of said heat sink, each of said first angle and said second angle being less than 180 degrees.

2. A cooling module according to claim 1 , wherein each of said first angle and said second angle is at least 110 degrees and less than 160 degrees.

3. A cooling module according to claim 1 , wherein each of said first angle and said second angle is at least 115 degrees and less than 125 degrees.

4. A cooling module according to claim 1 , wherein said cooling module comprises a first flow channel turn connecting the outlet of said first blower and said first flow channel, and a second flow channel turn connecting the outlet of said second blower and said second flow channel.

5. A cooling module according to claim 1 , wherein an outlet of said first flow channel is provided beside the outlet of said second blower and an outlet of said second flow channel is provided beside the outlet of said first blower.

6. A cooling module according to claim 1 , wherein at least one of said first blower and said second blower is configured to blow cooling air from said LED side of said heat sink into and through at least one of said first flow channel or said second flow channel, and at least one of said first flow channel or said second flow channels comprises an outlet at said cooling side of said heat sink and is configured to lead said cooling air out of said outlet.

7. A cooling module according to claim 1 , wherein said cooling module comprises a mounting frame comprising a main frame, a first side frame and a second side frame, wherein said first side frame and said second side frame are angled in relation to said main frame, said main frame comprising a central opening, and said heat sink is fixed to said main frame such that said LEDs are arranged in said central opening, and wherein said first blower is arranged at said first side frame and said second blower is arranged at said second side frame.

8. A cooling module according to claim 7 , wherein said first side frame comprises an opening allowing cooling air to be sucked into said first blower from the space between said main frame and said side frames, and said second side frame comprises an opening allowing cooling air to be sucked into said second blower from the space between said main frame and said side frames.

9. A cooling module according to claim 1 , wherein said light fixture comprises a lamp housing, and said LED side of said heat sink is arranged inside said lamp housing, and said flow channels comprise an outlet configured to lead said cooling air out of said housing.

10. A cooling module according to claim 9 , wherein said lamp housing comprises at least one opening arranged at said LED side of said heat sink, and said at least one opening is arranged at a position away from said outlets of said first flow channel and said second flow channel.

11. A cooling module according to claim 9 , wherein said cooling module comprises an outer shell part covering at least a portion of said cooling module, and said outer shell part forms a portion of said lamp housing.

12. A cooling module according to claim 11 , wherein said outer shell part comprises a first flow channel turn portion connecting an outlet of said first blower and said first flow channel, and a second flow channel turn portion connecting an outlet of said second blower and said second flow channel.

13. A cooling module according to claim 11 , wherein said outer shell part comprises a first outlet and a second outlet respectively arranged near an outlet of said first flow channel and an outlet of said second flow channel.

14. A moving head light fixture, comprising;
a head rotatably connected to a yoke that is rotatably connected to a base;
a pan rotating mechanism configured to rotate said yoke in relation to said base; and
a tilt rotating mechanism configured to rotate said head in relation to said yoke,
wherein said head includes a plurality of LEDs generating light and a cooling module, said cooling module having:
a heat sink comprising a LED side and a cooling side, where said cooling side being opposite said LED side and wherein said plurality of LEDs are arranged on a PCB at said LED side, and
a first blower and a second blower, wherein at least one of the first blower and the second blower is adapted to blow cooling air to said cooling side,
wherein said heat sink comprises a first linear flow channel arranged at said cooling side and a second linear flow channel arranged at said cooling side, said first flow channel and said second flow channel being arranged adjacent to each other at said cooling side,
wherein said first blower is configured to blow cooling air in a first flow direction substantially parallel to the PCB through said first flow channel, and said second blower is configured to blow cooling air in a second flow direction substantially parallel to the PCB through said second flow channel, said first flow direction and said second flow direction being opposite to each other, and the cooling air in each flow channel cooling several of the plurality of LEDs, and
wherein said first blower is arranged at a first angle in relation to said LED side of said heat sink, and said second blower is arranged at a second angle in relation to said LED side of said heat sink, each of said first angle and said second angle being less than 180 degrees.

15. A moving head light fixture according to claim 14 , wherein said head further includes a lamp housing, and said LED side of said heat sink is arranged inside said lamp housing, and said flow channels comprise an outlet configured to lead said cooling air out of said housing.

16. A moving head light fixture according to claim 14 , wherein said lamp housing comprises at least one opening arranged at said LED side of said heat sink, and said at least one opening is arranged at a position away from said outlets of said first flow channel and said second flow channel.

17. A moving head light fixture according to claim 16 , wherein said cooling module comprises an outer shell part covering at least a portion of said cooling module, and said outer shell part forms a portion of said lamp housing, said outer shell part compris

Assignees

• Martin Professional Aps

Inventors

• Kjaer Lars Barslund
• Dalsgaard Carlsten

Classifications

• F21V21/15

  specially adapted for power operation, e.g. by remote control · CPC title

• F21W2131/406

  for theatres, stages or film studios · CPC title

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title

• F21V14/02

  by movement of light sources {(in vehicle head lamps F21S41/657)} · CPC title

• F21V29/503

  of light sources (cooling arrangements structurally associated with gas-discharge or vapour-discharge lamps H01J61/52; cooling arrangements structurally associated with electric incandescent lamps H01K1/58; cooling arrangements structurally associated with light-emitting diodes H10H20/858) · CPC title