Heat sink

Patent metadata

Field	Value
Publication number	US-11898734-B2
Application number	US-202017057268-A
Country	US
Kind code	B2
Filing date	Sep 16, 2020
Priority date	Sep 17, 2019
Publication date	Feb 13, 2024
Grant date	Feb 13, 2024

Abstract

A charger for an electrical device (e.g., site light) includes a housing defining an interior cavity, and one or more openings formed in the housing. The one or more openings fluidly communicate the interior cavity with an exterior of the charger. A heat sink is at least partially disposed in the housing and operable to dissipate heat produced in the housing. A first portion of the heat sink is positioned within the interior cavity. A second portion of the heat sink is positioned in the one or more openings such that the heat sink is at least partially exposed to the exterior. The heat sink is in heat transfer relationship with components of charger electronics of the charger.

First claim

What is claimed is:

1. A charger for an electrical device, the charger comprising:
a housing having a plurality of walls defining an interior cavity, the housing including an inner housing member connected to one of the walls and separating a housing volume of the housing into a first interior cavity and a second interior cavity;
one or more openings formed in the housing, the one or more openings fluidly communicating the interior cavity with an exterior of the charger; and
a heat sink at least partially disposed in the housing and operable to dissipate heat produced in the housing, a first portion of the heat sink positioned within the interior cavity, a second portion of the heat sink positioned in the one or more openings such that the heat sink is at least partially exposed to the exterior, the heat sink in heat transfer relationship with components of charger electronics of the charger.

2. The charger of claim 1 , wherein the second portion forms one or more fins extending from the first portion, the one or more fins extending toward the one or more openings.

3. The charger of claim 2 , wherein the one or more fins extend through the one or more openings to the exterior of the charger.

4. The charger of claim 1 , further comprising a printed circuit board having the charger electronics and positioned within the interior cavity, the first portion of the heat sink coupled to the printed circuit board.

5. The charger of claim 1 , further comprising a fan supported by the housing, wherein the fan is positioned exterior to the housing, and wherein the fan is operable to pass air over the second portion.

6. The charger of claim 5 , wherein the fan has a rotational axis that extends parallel with a longitudinal axis of the one or more openings.

7. The charger of claim 1 , wherein the plurality of walls define a plurality of sides and an end connecting the plurality of sides of the housing, and wherein the one or more openings is positioned on one of one of the plurality of sides and the end of the housing.

8. The charger of claim 1 , wherein the first portion of the heat sink has a C-shape cross-sectional shape formed by a first section, a second section spaced from the first section, and an intermediate section extending therebetween, wherein the first section is coupled to a printed circuit board of the charger, and wherein the second portion extends from the second section toward the one or more openings.

9. The charger of claim 8 , wherein one or more of the first section, the second section, and the intermediate section includes at least one rib.

10. The charger of claim 1 , wherein the housing includes a longitudinal axis extending therethrough, and wherein the one or more openings extends along parallel with or perpendicular to the longitudinal axis.

11. The charger of claim 10 , wherein the second portion includes one or more fins, and the one or more fins extends parallel with or perpendicular to the longitudinal axis relative to the one or more openings.

12. The charger of claim 10 , wherein each of the one or more openings has a width relative to the longitudinal axis, and wherein each width is different.

13. The charger of claim 1 , further comprising a seal member positioned between the heat sink and an inner surface of the housing.

14. A site light comprising:
a main housing having a plurality of inner surfaces defining a first cavity; and
a charger supported by the main housing and positioned within the first cavity, the charger including
a charger housing having a plurality of inner surfaces defining a second cavity,
one or more openings formed in the charger housing, the one or more openings fluidly communicating the second cavity with the first cavity, and
a heat sink at least partially disposed in the charger housing and operable to dissipate heat produced in the charger housing, a first portion of the heat sink positioned in facing relationship with one of the inner surfaces of the charger housing, a second portion of the heat sink positioned in facing relationship with one of the inner surfaces of the main housing via the one or more openings such that the heat sink is at least partially exposed to the first cavity, the heat sink in heat transfer relationship with components of charger electronics of the charger.

15. The site light of claim 14 , further comprising a printed circuit board having the charger electronics and positioned within the second cavity, and a fan supported by the charger housing, wherein the first portion of the heat sink is coupled to the printed circuit board, wherein the fan is positioned exterior to the charger housing and within the first cavity, and wherein the fan is operable to pass air over the second portion.

16. The site light of claim 14 , wherein the first portion of the heat sink has a C-shape cross-sectional shape formed by a first section, a second section spaced from the first section, and an intermediate section extending therebetween, wherein the first section is couplable to a printed circuit board of the charger, and wherein the second portion extends from the second section toward the one or more openings.

17. The site light of claim 14 , further comprising a seal disposed between the heat sink and the charger housing, the seal fluidly isolating the second cavity from the first cavity exterior to the second cavity.

18. A site light comprising:
a main housing having a plurality of inner surfaces defining a first cavity; and
a charger supported by the main housing and positioned within the first cavity, the charger including
a charger housing having a plurality of inner surfaces defining a second cavity,
one or more openings formed in the charger housing, the one or more openings fluidly communicating the second cavity with the first cavity,
a printed circuit board having charger electronics, the printed circuit board positioned within the second cavity, and
a heat sink at least partially disposed in the charger housing and operable to dissipate heat produced in the charger housing, a first portion of the heat sink coupled to the printed circuit board and in heat transfer relationship with components of the charger electronics, the first portion positioned in facing relationship with one of the inner surfaces of the charger housing, a second portion of the heat sink extending from the first portion toward the one or more openings, the second portion positioned in facing relationship with one of the inner surfaces of the main housing via the one or more openings such that the heat sink is at least partially exposed to the first cavity.

19. The site light of claim 18 , further comprising a fan supported by the charger housing, the fan positioned exterior to the charger housing and positioned within the first cavity, wherein the second portion of the heat sink includes one or more fins extending from the first portion toward the one or more openings, and wherein the fan is operable to pass air over the one or more fins of the second portion.

20. The site light of claim 18 , wherein the first portion of the heat sink has a C-shape cross-sectional shape formed by a first section, a second section spaced from the first section, and an intermediate section extending therebetween, wherein the first section is coupled to the printed circuit board, and wherein the second portion extends from the second section toward the one or more openings.

21. The site light of claim 18 , further comprising a seal disposed between the heat sink and the ch

Assignees

• Milwaukee Electric Tool Corp

Inventors

• Cornell Brian
• Amundson Alan
• Wenzel Duane W
• Hansen Dalton F
• Young Tyler

Classifications

• H02J7/855

  with circuits adapted for supplying loads from the battery · CPC title

• H02J7/70

  characterised by the mechanical construction · CPC title

• F21V29/74 Primary

  with fins or blades · CPC title

• F21L4/00

  Electric lighting devices with self-contained electric batteries or cells · CPC title

• F21V29/508

  of electrical circuits · CPC title