Sealed electrical device with cooling system

• US 9,151,482 B2
• Filed: 11/19/2013
• Issued: 10/06/2015
• Est. Priority Date: 05/13/2011
• Status: Active Grant

• Current Assignee: Lighting Science Group Corporation (Pegasus Capital Advisors, L.P.)
• Original Assignee: Lighting Science Group Corporation (Pegasus Capital Advisors, L.P.)
• Inventors: Zhou, Ran, Widjaja, Addy S., Bastien, Valerie A., Oostdyk, Mark Andrew, Maxik, Fredric S., Bartine, David E., Soler, Robert R.
• Primary Examiner(s): Lee, Jong-Suk (James)
• Assistant Examiner(s): Dunay, Christopher E
• Application Number:
  US14/084,118
• Publication Number:
  US 20140177238A1
• Time in Patent Office: 686 Days
• Field of Search: 362/373, 362/294, 362/249.02, 362/375, 362/311.02, 362/335
• US Class Current: 1/1
• CPC Class Codes: F21K 9/20 Light sources comprising attachment means
• CPC Class Codes: F21V 29/60 characterised by the use of a forced flow of gas, e.g. air
• CPC Class Codes: F21V 29/65 the gas flowing in a closed circuit
• CPC Class Codes: F21V 29/74 with fins or blades
• CPC Class Codes: F21V 29/78 with helically or spirally arranged fins or blades
• CPC Class Codes: Y02B 20/30 Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Abstract

An electrical device and method are presented, the device having an enclosure defining an interior volume sealed from the environment and an electronic lighting apparatus, which may include a heat generating element such as a light source, a heat sink, and a fluid flow generator. The heat sink may be positioned partially within the sealed interior volume and adjacent the heat generating element and transfer heat therefrom. The fluid flow generator may create a flow of fluid to transport heat away from the heat sink and to the enclosure. The electronic lighting apparatus may be carried by the enclosure and partially disposed within the interior volume of the enclosure. The electrical device may further include an optic carried by the enclosure that may cooperate with the enclosure to define the sealed interior volume.

Claims

1. An electrical device comprising:

a heat generating element;

a heat sink thermally coupled to the heat generating element;

a fluid flow generator; and

an enclosure configured to create a sealed interior volume;

wherein the fluid flow generator is positioned within the sealed interior volume of the enclosure;

wherein the heat sink is positioned partially within the sealed interior volume of the enclosure; and

wherein the fluid flow generator is operable to generate a fluid flow incident upon the portion of the heat sink positioned within the sealed interior volume.

2. The electrical device of claim 1 wherein the heat generating element comprises a light source.

3. The electrical device of claim 2 wherein the light source comprises a light-emitting diode (LED).

4. The electrical device of claim 1 wherein at least one of the sealed interior volume and a surface area of the enclosure is directly proportional to the thermal energy generated by the heat generating element.

5. The electrical device of claim 1 wherein the fluid flow generator comprises a micro-blower.

6. The electrical device of claim 1 wherein the heat sink is a micro-channel heat sink comprising a plurality of fins.

7. The electrical device of claim 1 wherein the enclosure further comprises a wire portal comprising an aperture and a sealing member.

8. The electrical device of claim 1 further comprising an optic carried by the enclosure.

9. The electrical device of claim 1 wherein the enclosure further comprises:

a base member comprising a base surface and a sidewall; and

an attaching member comprising a sidewall and an optic receiving section;

wherein the sidewall of the base member is configured to attach to and form a fluid seal with the sidewall of the attaching member;

wherein a portion of the heat generating element is configured to attach to and form a fluid seal with the optic receiving section; and

wherein an optic is adapted to be carried by the optic receiving section.

10. The electrical device of claim 9 wherein the base member is generally circular;

wherein the attaching member is generally annular; and

wherein the optic has a generally concave geometry.

11. The electrical device of claim 1 wherein the fluid within the sealed interior volume is gaseous.

12. An electrical device comprising:

a heat generating element;

a heat sink thermally coupled to the heat generating element;

a fluid flow generator; and

an enclosure configured to create a sealed interior volume containing therein a gaseous fluid;

wherein the fluid flow generator is operable to generate a fluid flow incident upon a portion of the heat sink positioned within the sealed interior volume.

13. The electrical device of claim 12 wherein the heat generating element comprises a light source.

14. The electrical device of claim 13 wherein the light source comprises a light-emitting diode (LED).

15. The electrical device of claim 12 wherein the at least one of the sealed interior volume and a surface area of the enclosure is directly proportional to the thermal energy generated by the heat generating element.

16. The electrical device of claim 12 wherein the fluid flow generator comprises a micro-blower.

17. An electrical device operable to dissipate heat and maintain a thermal equilibrium of at least a portion of the electrical device comprising:

a heat generating element;

a heat sink thermally coupled to the heat generating element;

a fluid flow generator;

a support comprising;

a pedestal configured to attached to the fluid flow generator, and

a plurality of legs extending from the pedestal and configured to attach to the heat sink;

an enclosure; and

an optic carried by the enclosure;

wherein the optic is configured to interface with the enclosure so as to define a sealed interior volume;

wherein each of the fluid flow generator, the heat sink, and the heat generating element are positioned within the sealed interior volume; and

wherein the fluid flow generator is operable to generate a fluid flow incident upon a portion of the heat sink.

18. The electrical device of claim 17 wherein the heat generating element comprises a light source.

19. The electrical device of claim 18 wherein the light source comprises a light-emitting diode (LED).

20. The electrical device of claim 17 wherein the fluid flow generator comprises a micro-blower.