Cooling system and method of cooling electronic device

Patent metadata

Field	Value
Publication number	US-10321609-B2
Application number	US-201715787757-A
Country	US
Kind code	B2
Filing date	Oct 19, 2017
Priority date	Nov 28, 2016
Publication date	Jun 11, 2019
Grant date	Jun 11, 2019

Abstract

A cooling system includes an immersion tank that includes a liquid coolant sealed therein, a housing that includes through-holes formed in a top portion and a bottom portion thereof, respectively, and disposed within the immersion tank, an electronic device disposed in the housing in a state of being immersed in the coolant, a coolant flow path formed between an inner surface of the immersion tank and an outer surface of the housing to couplet he through-hole in the top portion of the housing to the through-hole in the bottom portion of the housing so that the coolant flows therethrough, and a heat transfer member that transports heat of the coolant in the coolant flow path to an outside of the immersion tank.

First claim

What is claimed is:

1. A cooling system comprising:
an immersion tank that includes a liquid coolant sealed therein;
a housing that includes through-holes formed in a top portion and a bottom portion thereof, respectively, and disposed within the immersion tank;
an electronic device disposed in the housing in a state of being immersed in the coolant;
a coolant flow path formed between an inner surface of the immersion tank and an outer surface of the housing to couple the through-hole in the top portion of the housing to the through-hole in the bottom portion of the housing so that the coolant flows therethrough; and
a heat pipe arranged through a side wall of the immersion tank, the heat pipe is a hollow cylindrical member, opposite ends of which are closed,
a hydraulic fluid is sealed in the heat pipe, and
the hydraulic fluid transports heat of the coolant in the coolant flow path to an outside of the immersion tank.

2. The cooling system according to claim 1 , wherein both the immersion tank and the housing are configured with a heat insulating member.

3. The cooling system according to claim 1 , wherein the housing has a space therein that is divided into a plurality of chambers by partitions, and a plurality of electronic devices is dispersively arranged in the plurality of chambers.

4. The cooling system according to claim 3 , wherein the plurality of chambers has a conical shape having a wider lower side and a narrower upper side.

5. The cooling system according to claim 3 , wherein the through-holes in the top portion and the bottom portion of the housing have a conical shape having a wider lower side and a narrower upper side.

6. The cooling system according to claim 1 , wherein the electronic device is a server or a storage device.

7. The cooling system according to claim 1 , wherein the heat transported to an outside of the immersion tank by the heat pipe is dissipated to an atmosphere.

8. A method of cooling an electronic device, comprising:
disposing a housing having through-holes formed in a top portion and a bottom portion thereof, respectively, in a sealed immersion tank, and disposing an electronic device in the housing so that an inside of the immersion tank is filled with a liquid coolant;
generating, by heat generated in the electronic device, natural convection of the coolant that is discharged out of the housing from the through-hole in the top portion of the housing, passes through a coolant flow path between an outer surface of the housing and an inner surface of the immersion tank, and returns to an inside of the housing from the through-hole in the bottom portion of the housing; and
transporting, by a heat pipe, heat of the coolant that passes through the coolant flow path to an outside of the immersion tank,
the heat pipe is arranged through a side wall of the immersion tank,
the heat pipe is a hollow cylindrical member, opposite ends of which are closed,
a hydraulic fluid is sealed in the heat pipe, and
the hydraulic fluid transports heat of the coolant in the coolant flow path to an outside of the immersion tank.

Assignees

• Fujitsu Ltd

Inventors

• Hirai Keita
• So Tsuyoshi
• Kosugi Naofumi

Classifications

• H05K7/20236

  by immersion · CPC title

• H05K7/20781 Primary

  within cabinets for removing heat from server blades · CPC title