Heat sinks and lamp incorporating same

• US 9,217,542 B2
• Filed: 01/07/2010
• Issued: 12/22/2015
• Est. Priority Date: 10/20/2009
• Status: Active Grant

• Current Assignee: IDEAL Industries Lighting, LLC (Ideal Industries Incorporated)
• Original Assignee: CREE Incorporated (Wolfspeed, Inc.)
• Inventors: Pickard, Paul Kenneth, Negley, Gerald H., Van De Ven, Antony Paul, Medendorp, Nicholas W. Jr.
• Primary Examiner(s): TRAN, THUY V
• Application Number:
  US12/683,886
• Publication Number:
  US 20110089830A1
• Time in Patent Office: 2,175 Days
• Field of Search: 362/227, 362/230, 362/249.02, 362/294, 362/296.01
• US Class Current: 1/1
• CPC Class Codes: F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• CPC Class Codes: F21V 29/507 of means for protecting lighting devices from damage, e.g. housings
• CPC Class Codes: F21V 29/54 using thermoelectric means, e.g. Peltier elements
• CPC Class Codes: F21V 29/63 using electrically-powered vibrating means; using ionic wind
• CPC Class Codes: F21V 29/677 the fans being used for discharging
• CPC Class Codes: F21V 29/71 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
• CPC Class Codes: F21V 29/74 with fins or blades
• CPC Class Codes: F21V 29/75 with fins or blades having different shapes, thicknesses or spacing
• CPC Class Codes: F21V 29/83 the elements having apertures, ducts or channels, e.g. heat radiation holes
• CPC Class Codes: F21V 29/85 characterised by the material liquid coolants F21V29/56
• CPC Class Codes: F21Y 2107/00 Light sources with three-dimensionally disposed light-generating elements
• CPC Class Codes: F21Y 2107/30 on the outer surface of cylindrical surfaces, e.g. rod-shaped supports having a circular or a polygonal cross section
• CPC Class Codes: F21Y 2113/13 comprising an assembly of point-like light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A lamp comprising a solid state light emitter, the lamp being an A lamp and providing a wall plug efficiency of at least 90 lumens per watt. Also, a lamp comprising a solid state light emitter and a power supply, the emitter being mounted on a heat dissipation element, the dissipation element being spaced from the power supply. Also, a lamp, comprising a solid state light emitter and a heat dissipation element that has a heat dissipation chamber, whereby an ambient medium can enter the chamber, pass through the chamber, and exit. Also, a lamp, comprising a light emissive housing at least one solid state lighting emitter and a first heat dissipation element. Also, a lamp comprising a heat sink comprising a heat dissipation chamber. Also, a lamp comprising first and second heat dissipation elements. Also, a lamp comprising means for creating flow of ambient fluid.

Claims

1. A lamp, comprising:

at least a first solid state light emitter; and

at least a first heat dissipation element that defines at least one heat dissipation chamber, the first heat dissipation element comprising at least one dissipation region sidewall,

the first solid state light emitter thermally coupled to the first heat dissipation element,

the heat dissipation chamber having at least a first inlet opening and at least a first outlet opening, whereby an ambient medium can enter the first inlet opening, pass through the heat dissipation chamber and exit the first outlet opening,

the heat dissipation chamber comprising one or more plenums, the first plenum of the one or more plenums having at least a first end and a second end, whereby fluid can flow from the first end to the second end, the first plenum non-straight so that no straight path can be defined that enters the heat dissipation chamber through the first end, extends within the plenum from the first end to the second end, and exits the heat dissipation chamber through the second end.

2. A lamp as recited in claim 1, wherein the first plenum is venturi-shaped.

3. A lamp as recited in claim 1, wherein the first plenum tapers from a first cross-sectional area to a second cross-sectional area, the first cross-sectional area differing in size from the second cross-sectional area.

4. A lamp as recited in claim 1, wherein the first plenum extends at an angle relative to an axis of the heat dissipation chamber.

5. A lamp as recited in claim 1, wherein the first plenum is honeycomb-shaped.

6. A lamp as recited in claim 1, wherein the first plenum is an open pore shape.

7. A lamp as recited in claim 1, wherein the first plenum is spiral-shaped.

8. A lamp as recited in claim 1, wherein the heat dissipation chamber has a shape that prevents ambient medium from traveling in a straight path from the first inlet opening to the first outlet opening.

9. A lamp, comprising:

at least a first solid state light emitter and a second solid state light emitter;

means for creating flow of ambient fluid; and

at least a first element and a second element, the first solid state light emitter on the first element, the second solid state light emitter on the second element, the first element alone defining an internal space, at least a portion of the second element in the internal space, the second element spaced from the first element.

10. A lamp as recited in claim 9, wherein the means for creating flow of ambient fluid comprises at least one active cooling device.

11. A lamp as recited in claim 9, wherein the means for creating flow of ambient fluid consists of passive cooling.

12. A lamp, comprising:

at least a first reflective structure, the first reflective structure comprising at least one reflective surface;

a heat dissipation element;

at least one solid state light emitter,

one or more portions of the at least one reflective surface alone defining a space,

at least a portion of the heat dissipation element in the space,

the at least one solid state light emitter mounted on the heat dissipation element.

13. A lamp as recited in claim 12, wherein the at least one solid state light emitter is facing away from the heat dissipation element and toward the first reflective structure.

14. A lamp as recited in claim 12, wherein

the heat dissipation element comprises a plurality of mounting surfaces that each face the first reflective structure,

at least one solid state light emitter is on each of the mounting surfaces.

15. A lamp as recited in claim 14, wherein at least a first passageway extends through the heat dissipation element, the first passageway defined by passageway surfaces, each of the passageway surfaces opposite one of the mounting surfaces.

16. A lamp as recited in claim 12, wherein at least one passageway extends through the heat dissipation element and communicates with at least one opening in the first reflective structure.

17. A lamp as recited in claim 16, wherein at least one protrusion extends from an internal surface of the heat dissipation element into the passageway.

18. A lamp as recited in claim 12, wherein the first reflective structure has a parabolic surface.

19. A lamp as recited in claim 12, wherein the first reflective structure has a curved surface.

20. A lamp as recited in claim 12, wherein an axis of the heat dissipation element is substantially parallel to an axis of the curved surface.