High-lumen fixture thermal management

Patent metadata

Field	Value
Publication number	US-10900652-B2
Application number	US-201916383381-A
Country	US
Kind code	B2
Filing date	Apr 12, 2019
Priority date	Sep 22, 2015
Publication date	Jan 26, 2021
Grant date	Jan 26, 2021

Abstract

A lighting fixture structure for a suspended lighting fixture includes an electronics housing for containing lighting electronics. The lighting fixture structure further includes a thermal barrier positioned around a portion of the electronics housing. The lighting fixture structure also includes a heat sink. The electronics housing is separated from the thermal barrier by a first air gap, and the thermal barrier is separated from the heat sink by a second air gap.

First claim

What is claimed is:

1. A lighting fixture structure for a suspended lighting fixture, comprising:
an electronics housing;
a thermal barrier separated from the electronics housing by a first air gap, wherein at least a portion of the electronics housing is positioned in a cavity of the thermal barrier; and
a heat sink positioned outside of the thermal barrier and horizontally spaced from the thermal barrier by a second air gap, wherein the electronics housing is attached to the heat sink by one or more bridge structures that extend across the first air gap and the second air gap below the thermal barrier.

2. The lighting fixture structure of claim 1 , wherein the one or more bridge structures provide one or more wireways for routing one or more wires from the electronics housing to the heat sink.

3. The lighting fixture structure of claim 1 , wherein the electronics housing is attached to the thermal barrier by one or more brackets.

4. The lighting fixture structure of claim 1 , wherein the first air gap allows air flow through the thermal barrier from a bottom opening of the thermal barrier to a top opening of the thermal barrier.

5. The lighting fixture structure of claim 4 , wherein the first air gap surrounds the electronics housing.

6. The lighting fixture structure of claim 1 , wherein the second air gap allows air flow between the heat sink and the thermal barrier along an outside of the thermal barrier.

7. The lighting fixture structure of claim 1 , wherein the electronics housing includes an opening on a bottom side of the electronics housing that allows air to enter the electronics housing and wherein the electronics housing includes a vent to allow the air that enters the electronics housing to exit the electronics housing.

8. The lighting fixture structure of claim 7 , wherein the vent is formed on a side wall of the electronics housing, the side wall of the electronics housing facing the thermal barrier.

9. The lighting fixture structure of claim 1 , wherein an opening on a top side of the electronics housing provides a pathway for extending a wire into the electronics housing.

10. A suspended lighting fixture, comprising:
a light source;
an electronics housing;
a thermal barrier separated from the electronics housing by a first air gap, wherein at least a portion of the electronics housing is positioned in a cavity of the thermal barrier; and
a heat sink positioned outside of the thermal barrier and horizontally spaced from the thermal barrier by a second air gap, wherein the light source is attached to the heat sink, wherein the electronics housing is attached to the heat sink by one or more bridge structures that extend across the first air gap and the second air gap below the thermal barrier.

11. The suspended lighting fixture of claim 10 , further comprising one or more lenses covering the light source.

12. The suspended lighting fixture of claim 10 , wherein the electronics housing is attached to the thermal barrier by one or more brackets.

13. The suspended lighting fixture of claim 10 , wherein the first air gap allows air flow through the thermal barrier from a bottom opening of the thermal barrier to a top opening of the thermal barrier.

14. The suspended lighting fixture of claim 10 , wherein the electronics housing includes an opening on a bottom side of the electronics housing that allows air to enter the electronics housing and wherein the electronics housing includes a vent that allows the air that enters the electronics housing to exit the electronics housing.

15. The suspended lighting fixture of claim 14 , wherein the vent is formed on a top side of the electronics housing.

16. A method of assembling a suspended lighting fixture, comprising:
providing an electronics housing;
placing at least portion of the electronics housing in a cavity of a thermal barrier such that the thermal barrier is separated from the electronics housing by a first air gap;
placing a heat sink outside of the thermal barrier such that the heat sink is spaced from the thermal barrier by a second air gap; and
attaching the electronics housing to the heat sink by one or more bridge structures that extend across the first air gap and the second air gap below the thermal barrier.

17. The method of claim 16 , further comprising attaching a light source to the heat sink.

18. The method of claim 17 , further comprising routing an electrical wire from the electronics housing to the light source through a wireway extending between the electronics housing and the heat sink, wherein the wireway crosses the first air gap and the second air gap.

Assignees

• Signify Holding Bv

Inventors

• Bryant Christopher Michael

Classifications

• H05K7/20127

  Natural convection · CPC title

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title

• F21V23/002

  Arrangements of cables or conductors inside a lighting device, e.g. means for guiding along parts of the housing or in a pivoting arm · CPC title

• F21S8/06

  by suspension · CPC title

• F21V29/10 Primary

  Arrangement of heat-generating components to reduce thermal damage, e.g. by distancing heat-generating components from other components to be protected · CPC title