INSULATED LED DEVICE

• US 20120033431A1
• Filed: 08/09/2011
• Published: 02/09/2012
• Est. Priority Date: 08/09/2010
• Status: Active Grant

• Current Assignee: Air Motion Systems, Inc. (Forsyth Baldwin LLC)
• Original Assignee: Air Motion Systems, Inc. (Forsyth Baldwin LLC)
• Inventors: MARTINEZ, AARON D., Wertz, Jared J.
• Granted Patent: US 8,641,236 B2
• Time in Patent Office: Days
• US Class Current: 362/294
• CPC Class Codes: F21S 4/28 rigid, e.g. LED bars
• CPC Class Codes: F21V 15/013 the housing being an extrusion
• CPC Class Codes: F21V 15/015 Devices for covering joints between adjacent lighting devices; End coverings
• CPC Class Codes: F21V 29/507 of means for protecting lighting devices from damage, e.g. housings
• CPC Class Codes: F21V 29/56 using liquid coolants F21V29/51 takes precedence
• CPC Class Codes: F21V 29/58 characterised by the coolants
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 29/75 with fins or blades having different shapes, thicknesses or spacing
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H05K 13/04 Mounting of components , e.g. of leadless components
• CPC Class Codes: Y10T 29/49002 Electrical device making

Abstract

An LED device has an LED assembly connected to or abutting a heat sink, the heat sink connected to a cooling bridge and optionally enclosed within insulated connector end caps and crossover end caps and within a reflector cover and side cover. The cooling bridge conducts heat to the heat sink away from the reflector cover, and side cover, where the heat may be removed by a circulating coolant. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 C.F.R. §1.72(b).

Claims

1. An LED device comprising:

an LED assembly;

a plurality of heat-conducting cooling bridges;

a heat sink attached to said plurality of cooling bridges;

a reflector positioned by a reflector cover to direct radiation from said LED assembly; and

connector and crossover end caps.

2. The LED device of claim 1, further comprising means for coolant ingress and egress.

3. The LED device of claim 1, wherein said heat sink includes a water rail, said water rail defining a plurality of channels for coolant flow.

4. The LED device of claim 1, wherein said cooling bridges comprise a metal.

5. The LED device of claim 1, wherein said cooling bridges comprise aluminum.

6. The LED device of claim 1, wherein said connector and crossover end caps further comprise aluminum and a thermally insulative material.

7. The LED device of claim 6 wherein said insulating material comprises an acetyl polymer.

8. The LED device of claim 1, wherein the heat sink comprises a water rail having a plurality of axially defined water rail channels.

9. The LED device of claim 8, wherein the crossover end cap defines a crossover end cap channel between said water rail channels.

10. The LED device of claim 1, wherein the insulating material of the connector and crossover end caps contacts the heat sink.

11. The LED device of claim 1, further comprising a reflector cover and side cover attaching to the connector and crossover end caps.

12. The LED device of claim 11, further comprising a window extending between the reflector and side covers.

13. A method of manufacturing an LED device, comprising:

attaching an LED assembly to a heat sink, the LED assembly having a plurality of LED chips;

attaching a plurality of cooling bridges to the heat sink, said heat sink having a pair of axially formed channels;

positioning a reflector to direct radiation emitting from said LED chips; and

attaching a connection end cap and a crossover end cap to the water rail so as to form a fluidic circuit.

14. The method of claim 13, further comprising attaching a reflector cover and a side cover to said connection end cap and said crossover end cap.

15. The method of claim 14, further comprising positioning a window such that radiation from said reflector passes through said window.

16. The method of claim 14, wherein said reflector is positioned in said reflector cover.

17. The method of claim 14, wherein attaching said reflector cover and said side cover to said connection end cap and said crossover end cap establishes thermal contact between said cooling bridge and said reflector cover, between said cooling bridge and said side cover, and between said cooling bridge and said water rail.

18. A method of cooling an LED device, said LED device comprising an LED array, a reflector directing radiation emitted from said LED array, a water rail attached to said LED array and abutting a cooling bridge, said method comprising circulating a coolant within axial channels formed in said water rail.

19. The method of claim 18, wherein said LED device further comprises a crossover end cap conducting fluid from one of said axial channels to another of said axial channels.

20. The method of claim 18, wherein said LED device further comprises a connection end cap and wherein said coolant is provided to said water rail from said connection end cap.