Heat sink, and method for producing same

Patent metadata

Field	Value
Publication number	US-9915482-B2
Application number	US-201113700566-A
Country	US
Kind code	B2
Filing date	Mar 25, 2011
Priority date	Jun 7, 2010
Publication date	Mar 13, 2018
Grant date	Mar 13, 2018

Abstract

A heat sink including a base section, connection fins, and parallel fins. The base section includes: a first base plate configured to be mounted with a heat generating component on its outer surface; a second base plate disposed to face the first base plate in a parallel manner, configured to be mounted with a heat generating component on its outer surface; and a third base plate disposed perpendicular to the first base plate and the second base plate, which secures the first base plate and the second base plate along a junction line. The base section includes first and second regions arranged in the direction of the junction line. The connection fins are disposed on the first region to connect inner surfaces of the first and second base plates and to be parallel to the third base plate, and the parallel fins are disposed on the second region from an inner surface of the third base plate to be parallel to the first base plate.

First claim

The invention claimed is:

1. A heat sink in which heat-releasing fins are provided to a base section, comprising:
the base section including:
a) a first base plate which has an outer surface and an inner surface, a first heat generating component mounted on the outer surface of the first base plate,
b) a second base plate which is disposed so as to face the first base plate in a parallel manner, has an outer surface and an inner surface, a second heat generating component mounted on the outer surface of the second base plate, and
c) a third base plate which is disposed so as to be perpendicular to the first base plate and the second base plate, secures the first base plate and the second base plate along junction lines, and has an outer surface and an inner surface,
the base section further including at least one first region and at least one second region which are arranged in a direction of the junction lines, each of the first region and the second region surrounded by the first base plate, the third base plate and the second base plate;

a connection fin disposed extending between the inner surfaces of the first base plate and the second base plate such that one tip end portion of the connection fin contacts the inner surface of the first base plate and the other tip end portion of the connection fin contacts the inner surface of the second base plate, the connection fin being parallel to the third base plate; and
a parallel fin disposed so as to extend from the inner surface of the third base plate to be parallel to the first base plate such that the parallel fin overlaps the connection fin when viewed in the direction of the junction lines to form a straight cooling air path adjacent to the connection fin and the parallel fin in the direction of the junction lines,
wherein the first region includes only a plurality of the connection fins and the second region includes only a plurality of the parallel fins.

2. The heat sink according to claim 1 , wherein the connection fin and the parallel fin are orthogonal to each other when seen in the direction of the junction lines.

3. The heat sink according to claim 1 , wherein the base section is in an angular U shape when seen in the direction of the junction lines.

4. The heat sink according to claim 1 , further comprising:
a fourth base plate provided to tip end portions of the first base plate and the second base plate to be parallel to the third base plate.

5. A heat sink in which heat-releasing fins are provided to a base section, comprising:
the base section including:
a) a first base plate which has an outer surface and an inner surface, a first heat generating component to be mounted on the outer surface of the first base plate,
b) a second base plate which is disposed so as to face the first base plate in a parallel manner, has an outer surface and an inner surface, a second heat generating component to be mounted on the outer surface of the second base plate, and
c) a third base plate which is disposed so as to be perpendicular to the first base plate and the second base plate, secures the first base plate and the second base plate along junction lines, and has an outer surface and an inner surface,
the base section further including at least one first region and at least one second region which are arranged in a direction of the junction lines;

a connection fin disposed in the first region extending between the inner surfaces of the first base plate and the second base plate such that one tip end portion of the connection fin contacts the inner surface of the first base plate and the other tip end portion of the connection fin contacts the inner surface of the second base plate, the connection fin being parallel to the third base plate;
a parallel fin disposed in the second region so as to extend from the inner surface of the third base plate to be parallel to the first base plate such that the parallel fin overlaps the connection fin when viewed in the direction of the junction lines to form a straight cooling air path adjacent to the connection fin and the parallel fin in the direction of the junction lines; and
a coupling plate that couples tip end portions of the first base plate and the second base plate and a tip end portion of the parallel fin.

6. The heat sink according to claim 1 , wherein at least one of the following is satisfied:
the base section includes at least two second regions provided so that the at least one first region is sandwiched between the at least two second regions and
the base section includes at least two first regions provided so that the at least one second region is sandwiched between the at least two first regions.

7. The heat sink according to claim 1 , wherein a fan is provided to an end portion of the base section in the direction of the junction lines.

8. The heat sink according to claim 1 , wherein a fan is provided to an end portion of the base section in a direction perpendicular to the junction lines so as to face the third base plate with the parallel fin interposed therebetween.

9. The heat sink according to claim 1 , further comprising:
a board positioning boss and a board fixing screw hole provided on the first base plate and the second base plate;
a fan positioning boss, a fan fixing screw hole, a fan cover lug fixing hole and a wiring passage provided on an upper portion of the base section;
a fixing plate provided to a tip end of the first base plate;
a heat sink fixing hole provided in the fixing plate;
a heat generating component mounting screw hole provided in the first base plate, the second base plate and the fourth base plate;
a resin cover fixing hole provided in the fourth base plate; and
a resin cover fixing lug provided on the first base plate and the second base plate.

10. The heat sink according to claim 1 , wherein an air inlet width of the second region from an outlet of the first region into the second region is substantially similar to an air outlet width of the first region from the outlet of the first region into the second region.

11. A heat sink in which heat-releasing fins are provided to a base section, comprising:
the base section including:
a) a first base plate which has an outer surface and an inner surface, a first heat generating component to be mounted on the outer surface of the first base plate,
b) a second base plate which is disposed so as to face the first base plate in a parallel manner, has an outer surface and an inner surface, a second heat generating component to be mounted on the outer surface of the second base plate, and
c) a third base plate which is disposed so as to be perpendicular to the first base plate and the second base plate, secures the first base plate and the second base plate along junction lines, and has an outer surface and an inner surface,
the base section further including at least one first region and at least one second region which are arranged in a direction of the junction lines;

a connection fin disposed in the first region connecting the inner surfaces of the first base plate and the second base plate and being parallel to the third base plate; and
a parallel fin disposed in the second region so as to extend from the inner surface of the third base plate to be parallel to the first base plate such that the parallel fin overlaps the connection fin when viewed in the direction of the junction lines to form a straight cooling air path adjacent to the connection fin and the parallel fin in the direction of the junction lines,
wherein the connection fin and the parallel fin are not in contact with each other.

Assignees

• Kato Kenji
• Ipposhi Shigetoshi
• Tanaka Toshiki
• Motokawa Shinya
• Nakayama Toshio
• Ibushi Masafumi
• Mitsubishi Electric Corp

Inventors

• Kato Kenji
• Ipposhi Shigetoshi
• Tanaka Toshiki
• Motokawa Shinya
• Nakayama Toshio
• Ibushi Masafumi

Classifications

• H10W40/43 Primary

  by flowing gases, e.g. forced air cooling · CPC title

• H10W40/10 Primary

  Arrangements for heating · CPC title

• F28D2021/0029

  Heat sinks · CPC title

• H01L2924/00

  Electricity · mapped topic

• H01L2924/0002

  Electricity · mapped topic