Heat sink

Patent metadata

Field	Value
Publication number	US-11287192-B2
Application number	US-201615766793-A
Country	US
Kind code	B2
Filing date	Oct 4, 2016
Priority date	Oct 8, 2015
Publication date	Mar 29, 2022
Grant date	Mar 29, 2022

Abstract

Provided is a heat sink having excellent heat dissipation efficiency by having excellent thermal diffusion characteristics in a planar direction of a heat receiving plate. The heat sink has the heat receiving plate that is thermally connected to a heating element, heat pipes that are thermally connected to the heat receiving plate and are formed from a tube body, and heat dissipation fins that are thermally connected to the heat receiving plate, wherein the heat pipes are provided in a plurality of layers in a vertical direction to a surface of the heat receiving plate, and in at least two layers of the plurality of layers, positions of the heat pipes on the surface of the heat receiving plate are not identical to each other.

First claim

The invention claimed is:

1. A heat sink comprising:
a heat receiving plate configured for thermal connection thermally connected to a heating element;
heat pipes formed from a tube body thermally connected to the heat receiving plate; and
heat dissipation fins thermally connected to the heat receiving plate,
wherein the heat pipes are provided in a plurality of layers in a vertical direction to a surface of the heat receiving plate by having a first heat pipe layer and a second heat pipe layer laminated on the first heat pipe layer in a vertical direction to the surface of the heat receiving plate, wherein the first heat pipe layer is formed by a first heat pipe and a first heat conductor provided around the first heat pipe being thermally connected thereto, wherein the first heat pipe is fitted into a groove part of the first heat conductor, wherein the groove part has a shape and dimensions corresponding to a shape and dimensions of the first heat pipe, and wherein the second heat pipe layer is formed by a second heat pipe and a second heat conductor provided around the second heat pipe being thermally connected thereto, wherein the second heat pipe is fitted in a hole part of the second heat conductor, wherein the hole part has a shape and dimensions correspond to a shape and dimensions of the second heat pipe and in at least two layers of the plurality of layers, positions of the heat pipes on the surface of the heat receiving plate are not identical to each other, and wherein at least a portion of the first heat pipe is in contact with the second heat pipe layer, wherein the heat receiving plate and the heat dissipation fins overlap a whole of the first heat pipe layer and a whole of the second heat pipe layer in plan view, and the whole of the first heat pipe layer overlaps the whole of the second heat pipe layer in plan view,
wherein the second heat conductor is a plate-like body, and the surface thereof is arranged in the parallel direction to a whole of the surface of the heat receiving plate, and
wherein the heat dissipation fins, which are different from the second heat conductor, are erected such that the heat dissipation fins are vertical to a surface of the second heat pipe layer in a state in which the heat dissipation fins contact the second heat pipes and the second heat conductor in the second heat pipe layer via the plate-like body.

2. The heat sink according to claim 1 , wherein the heat pipes have a flat shape.

3. The heat sink according to claim 1 , wherein a shape of the heat pipes is U-shaped, linear, L-shaped, S-shaped, or channel-shaped.

4. The heat sink according to claim 1 , wherein at least a portion of the heat pipes is arranged at a same position as the heating element in plan view.

Assignees

• Furukawa Electric Co Ltd

Inventors

• TOCHIGI Yasuyuki
• Tseng Hung Wei
• CHU Kuang Yu
• Meguro Masahiro
• Kawabata Kenya

Classifications

• H10W40/226

  characterised by projecting parts, e.g. fins to increase surface area (leadframes for cooling H10W70/461) · CPC title

• H10W40/73

  for cooling by change of state · CPC title

• F28D15/0275

  Arrangements for coupling heat-pipes together or with other structures, e.g. with base blocks; Heat pipe cores · CPC title

• F28D2015/0216

  having particular orientation, e.g. slanted, or being orientation-independent · CPC title

• F28D15/0233 Primary

  the conduits having a particular shape, e.g. non-circular cross-section, annular (F28D15/0241, F28D15/0266 take precedence) · CPC title