US Patent No. 11,116,106


Patent No. 11,116,106
Issue Date September 07, 2021
Title Cooling Device, Cooling System, And Method Of Cooling
Inventorship Shinobu Harada, Shizuoka (JP)
Youichi Yokota, Mishima (JP)
Keita Hirai, Kawasaki (JP)
Shinnosuke Fujiwara, Kawasaki (JP)
Assignee FUJITSU LIMITED, Kawasaki (JP)

Claim of US Patent No. 11,116,106

1. A cooling device comprising:an inner tank configured to store a first coolant which is a liquid;
a separation wall that is provided in the inner tank, that faces a side wall portion of the inner tank, that forms an accommodating portion in which an electronic device to be immersed in the first coolant is accommodated, and that forms, at at least part of a periphery of the accommodating portion, a coolant channel through which the first coolant is to flow toward a lower side of the inner tank;
an outer tank which is disposed outside the inner tank and through which a second coolant flows;
a heat sink including an inner fin and an outer fin, and positioned at an upper side of the inner tank, the heat sink is configured to transfer heat from the first coolant to the second coolant; and
a bottom plate that is disposed below the accommodating portion, that has an injection hole through which the first coolant having has flowed, through the coolant channel, to a region below the accommodating portion is injected toward the accommodating portion,
the injection hole is tapered such that a diameter of the injection hole reduces from a lower surface side of the bottom plate to an upper surface side of the bottom plate,
the inner fin has an area enlarged portion disposed in an upper portion of the inner fin,
an upper edge portion of the separation wall has a guide plate portion inclined toward a central portion of the inner tank as the guide plate portion extends upward, and
the area enlarged portion and the guide plate portion are opposed to one another so that a force of a flow of the first coolant is able to be further increased.