Cold plate

Patent metadata

Field	Value
Publication number	US-12460845-B2
Application number	US-202418439990-A
Country	US
Kind code	B2
Filing date	Feb 13, 2024
Priority date	Feb 14, 2023
Publication date	Nov 4, 2025
Grant date	Nov 4, 2025

Abstract

A cold plate includes a main body in contact with a heat source. The main body has: an inflow hole through which a refrigerant flows in; an outflow hole through which the refrigerant flows out; and an internal space communicating with the inflow hole and the outflow hole and through which the refrigerant flows, and includes: a first heat exchange layer in the internal space; and a second heat exchange layer in the internal space. The first heat exchange layer and the second heat exchange layer are laminated in a thickness direction of the first heat exchange layer and of the second heat exchange layer.

First claim

What is claimed is:

1 . A cold plate comprising:
a main body in contact with a heat source, wherein the main body:
has:
an inflow hole through which a refrigerant flows in;
an outflow hole through which the refrigerant flows out; and
an internal space communicating with the inflow hole and the outflow hole and through which the refrigerant flows; and

comprises:
a first heat exchange layer in the internal space; and
a second heat exchange layer in the internal space,

the first heat exchange layer and the second heat exchange layer are laminated in a thickness direction of the first heat exchange layer and of the second heat exchange layer, the first heat exchange layer has:
a first flow path through which the refrigerant flows in a first direction; and
a second flow path through which the refrigerant flows in the first direction and disposed at a position different from the first flow path in a second direction intersecting the first direction, and
the second heat exchange layer has:
a cross flow path in the internal space that communicates with the first flow path and the second flow path such that the refrigerant flows therethrough in the second direction.

2 . The cold plate according to claim 1 , wherein
the second heat exchange layer further has cross flow paths in the internal space that communicate with the first flow path and the second flow path such that the refrigerant flows therethrough in the second direction, and the cross flow paths are disposed at different positions from each other in the first direction.

3 . The cold plate according to claim 1 , further comprising an outlet blocking portion restricting a flow of the refrigerant in the first direction at an end of the first flow path close to the outflow hole in the first direction.

4 . The cold plate according to claim 3 , wherein the cross flow path communicates with a portion of the first flow path adjacent to the outlet blocking portion.

5 . The cold plate according to claim 3 , wherein
the second heat exchange layer further has cross flow paths in the internal space that communicate with the first flow path and the second flow path such that the refrigerant flows therethrough in the second direction, the cross flow paths are disposed at different positions from each other in the first direction, the cold plate further comprises:
a first intermediate blocking portion restricting a flow of the refrigerant in the first direction at a portion of the first flow path other than ends of the first flow path in the first direction; and
a second intermediate blocking portion restricting a flow of the refrigerant in the first direction at a portion of the second flow path other than ends of the second flow path in the first direction, and
the second intermediate blocking portion is disposed between the outlet blocking portion and the first intermediate blocking portion in the first direction.

6 . The cold plate according to claim 3 , further comprising an inlet blocking portion restricting a flow of the refrigerant in the first direction at an end of the second flow path close to the inflow hole in the first direction.

7 . The cold plate according to claim 1 , wherein the main body comprises:
first heat exchange layers in the internal space; and second heat exchange layers in the internal space, wherein the first heat exchange layers and the second heat exchange layers are alternately laminated in the thickness direction, each of the first heat exchange layers has:
a first flow path through which the refrigerant flows in a first direction; and
a second flow path through which the refrigerant flows in the first direction and disposed at a position different from the first flow path in a second direction intersecting the first direction, and
each of the second heat exchange layers has:
a cross flow path in the internal space that communicates with the first flow path and the second flow path such that the refrigerant flows therethrough in the second direction.

8 . The cold plate according to claim 7 , further comprising a restriction portion restricting a range in which the refrigerant moves in the thickness direction at a portion in which the first flow path and the second flow path intersect the cross flow path when viewed in the thickness direction.

Assignees

• Fujikura Ltd

Inventors

• Matsuda Masahiro
• Kawahara Yoji

Classifications

• F28F2250/108

  with combined cross flow and parallel flow · CPC title

• F28F2215/00

  Fins · CPC title

• F28F7/02

  Blocks traversed by passages for heat-exchange media {(F28D7/0008 takes precedence)} · CPC title

• F25B39/022

  with plate-like or laminated elements · CPC title

• F25B41/48 Primary

  for flow path resistance control on the downstream side of the diverging point, e.g. by an orifice · CPC title