Cooling structure of heating element and power conversion device

Patent metadata

Field	Value
Publication number	US-9807913-B2
Application number	US-201615231244-A
Country	US
Kind code	B2
Filing date	Aug 8, 2016
Priority date	Sep 29, 2014
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

Abstract

A cooling structure of a heating element includes: the heating element having at least one cooling surface from which a plurality of pin fins project; a heat receiving plate which has a shape complying with the cooling surface and in which holes are formed at positions facing each pin fin, each pin fin being movably inserted into the holes; a cooler which has a pair of clamping members that sandwich therebetween the heating element and the heat receiving plate while pressing the heating element and the heat receiving plate, and which cools the heat receiving plate; and a space securing part which is provided on the heat receiving plate and suppresses a distance between the pair of clamping members so as not to apply a pressing force by the clamping members to the heating element.

First claim

What is claimed is:

1. A cooling structure of a heating element, comprising:
the heating element having at least one cooling surface from which a plurality of pin fins project; and
a heat receiving member having holes at positions facing the pin fins, the pin fins being loosely disposed in the holes, such that the pins fins are freely movable in all directions in the holes;
wherein a distance from the cooling surface to a tip of each pin fin in a thickness direction of the heating element is shorter than a distance from the cooling surface to an outer surface of the heat receiving member.

2. The cooling structure of the heating element, according to claim 1 , wherein the heat receiving member is a heat receiving block.

3. The cooling structure of the heating element, according to claim 1 , wherein
the heating element has the cooling surface on two opposite surfaces thereof, and
the heat receiving member has the holes at positions facing each of the pin fins which project from the cooling surface on the two surfaces.

4. The cooling structure of the heating element, according to claim 3 , further comprising
a heat pipe through which cooling of the heat receiving member by the heat dissipating fin is performed.

5. The cooling structure of the heating element, according to claim 1 , wherein
the pin fins are loosely disposed in the holes such that when an external force is applied to the heat receiving member the external force is not applied to the heating element.

6. The cooling structure of the heating element, according to claim 1 , wherein
the heating element has a heat generating source and at least one cooling surface from which a plurality of pin fins project.

7. The cooling structure of the heating element, according to claim 1 , wherein
the pin fins are loosely disposed in the holes so as to be movable in a radial direction and in a depth direction of the holes.

8. The cooling structure of the heating element, according to claim 1 , further comprising:
a heat dissipating fin that cools the heat receiving member.

9. The cooling structure of the heating element, according to claim 8 , wherein
the heat receiving member is a heat receiving part, and
the heat dissipating fin cools the heat receiving part through heat receiving blocks that sandwich therebetween the heat receiving part while pressing the heat receiving part.

10. The cooling structure of the heating element, according to claim 1 , wherein the cooling surface and the plurality of the pin fins are formed of a continuous structure.

11. The cooling structure of the heating element, according to claim 1 , wherein the plurality of the pin fins project from two opposite sides of the cooling surface.

12. The cooling structure of the heating element, according to claim 1 , wherein a gap is provided between the heat receiving members and the cooling surface and between the heat receiving members and the plurality of pin fins.

13. A cooling structure of a heating element, comprising:
the heating element having at least one cooling surface from which the plurality of projections project; and
a heat receiving member having holes at positions facing the projections, the projections being loosely disposed in the holes, such that the pins fins are freely movable in all directions in the holes;
wherein a distance from the cooling surface to a tip of each projection in a thickness direction of the heating element is shorter than a distance from the cooling surface to an outer surface of the heat receiving member.

14. The cooling structure of the heating element, according to claim 13 , further comprising:
a heat dissipating fin that cools the heat receiving member.

15. The cooling structure of the heating element, according to claim 13 , wherein the cooling surface and the plurality of the pin fins are formed of a continuous structure.

16. The cooling structure of the heating element, according to claim 13 , wherein the plurality of the pin fins project from two opposite sides of the cooling surface.

17. The cooling structure of the heating element, according to claim 13 , wherein a gap is provided between the heat receiving members and the cooling surface and between the heat receiving members and the plurality of pin fins.

18. A power conversion device including a cooling structure of a heating element, the cooling structure of the heating element comprising:
the heating element having at least one cooling surface from which a plurality of projections project; and
a heat receiving member having holes at positions facing the projections, the projections being loosely disposed in the holes, such that the pins fins are freely movable in all directions in the holes;
wherein a distance from the cooling surface to a tip of each projection in a thickness direction of the heating element is shorter than a distance from the cooling surface to an outer surface of the heat receiving member.

19. The power conversion device including the cooling structure of the heating element, according to claim 18 , further comprising:
a heat dissipating fin that cools the heat receiving member.

20. The power conversion device including the cooling structure of the heating element, according to claim 18 , wherein the cooling surface and the plurality of the projections are formed of a continuous structure.

21. The power conversion device including the cooling structure of the heating element, according to claim 18 , wherein the plurality of the projections project from two opposite sides of the cooling surface.

22. The power conversion device including the cooling structure of the heating element, according to claim 18 , wherein a gap is provided between the heat receiving members and the cooling surface and between the heat receiving members and the plurality of pin fins.

23. A cooling structure of a heating element, comprising:
the heating element having a body part formed in a continuous structure with a plurality of pin fins and at least one cooling surface from which the plurality of pin fins project; and
a heat receiving member having holes at positions facing the pin fins, the pin fins being loosely disposed in the holes;
wherein a distance from the cooling surface to a tip of each pin fin in a thickness direction of the heating element is shorter than a distance from the cooling surface to an outer surface of the heat receiving member; and
wherein the plurality of the pin fins project from two opposite sides of the body part.

Assignees

• Hitachi Ltd

Inventors

• Matsumoto Daisuke
• Mima Akira
• Kawashima Tetsuya
• Mabuchi Yuuichi
• Hattori Yukio
• Kamizuma Hiroshi
• Miyagawa Ryouhei
• Ichikawa Tomonori

Classifications

• H10W40/228 Primary

  the projecting parts being wire-shaped or pin-shaped · CPC title

• H10W40/73

  for cooling by change of state · CPC title

• H10W40/60

  Securing means for detachable heating or cooling arrangements, e.g. clamps · CPC title

• H05K7/20336

  Heat pipes, e.g. wicks or capillary pumps · CPC title

• H05K7/20409

  Outer radiating structures on heat dissipating housings, e.g. fins integrated with the housing · CPC title