# US 10,772,234 B2 · Cooling device and electronic device system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,772,234 B2 - Document ID: US10772234B2 - Status: Granted - Kind: B2 - Application number: 15/899,132 - Filed: 2018-02-19 - Published: 2018-08-30 - Granted: 2020-09-08 - Earliest claimed: 2017-02-28 - Assignees: Fujitsu Limited - Applicants: Fujitsu Limited - Inventors: Nobuyuki Hayashi - Web page: https://patentgrep.com/patent/US10772234B2 ## CPC - H05K 7/202: {Air circulating in closed loop within enclosure wherein heat is removed through heat-exchangers} - H05K 7/20254: {Cold plates transferring heat from heat source to coolant} - H05K 7/20272: {Accessories for moving fluid, for expanding fluid, for connecting fluid conduits, for distributing fluid, for removing gas or for preventing leakage, e.g. pumps, tanks or manifolds} - H05K 7/20709: {for server racks or cabinets; for data centers, e.g. 19-inch computer racks} - H05K 7/20781: {within cabinets for removing heat from server blades} - H10W 40/47: by flowing liquids, e.g. forced water cooling - H10W 40/70: Fillings or auxiliary members in containers or in encapsulations for thermal protection or control - H10W 40/30: wherein the packaged device is completely immersed in a fluid other than air, e.g. immersed in a cryogenic fluid - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 ## Abstract A cooling device includes: coolers; a water-supply pipe that has branch pipes and supplies a coolant to the coolers, each of the branch pipes being coupled with each of the coolers; and a waste pipe that has branch pipes, each of which is coupled with each of the coolers. The coolant having passed through the coolers is exhausted to the waste pipe. The cooling device also includes a circulation pipe that couples an inlet of the water-supply pipe with an outlet of the waste pipe and has a pump to discharge the coolant and a coolant cooler to cool the coolant. The cooling device also includes a bypass flow path that is coupled with at least a top edge portion of the water-supply pipe, bypasses the plurality of coolers, and is coupled with the waste pipe. ## Claims ### Claim 1 A cooling device comprising: a plurality of coolers, each of which is provided in each of a plurality of electronic devices that are arrayed in a layered shape; a water-supply pipe that has a plurality of branch pipes and supplies a coolant to the plurality of coolers, each of the branch pipes being coupled with each of the plurality of coolers; a waste pipe that has a plurality of branch pipes, each of which is coupled with each of the plurality of coolers, the coolant having passed through the plurality of coolers being exhausted to the waste pipe; a circulation pipe that couples an inlet of the water-supply pipe with an outlet of the waste pipe and has a pump configured to discharge the coolant and a coolant cooler configured to cool the coolant; and a bypass flow path that is coupled with at least a top edge portion of the water-supply pipe, bypasses the plurality of coolers, and is coupled with the waste pipe. ### Claim 2 (depends on 1) The cooling device as claimed in claim 1, wherein: the plurality of coolers are parallelized in a layered shape in an up-down direction; the water-supply pipe and the waste pipe extend along the up-down direction; the water-supply pipe is branched at a bottom portion and has a starting edge pipe that acts as an upstream end of the bypass flow path; the waste pipe is branched at a bottom portion and has an ending edge pipe that acts as a downstream end of the bypass flow path; and the bypass flow path passes through a position connected to a top edge portion of the water-supply pipe and couples the starting edge pipe with the ending edge pipe. ### Claim 3 (depends on 2) The cooling device as claimed in claim 2, wherein the starting edge pipe is positioned lower than a cooler of a bottom step among the plurality of coolers arrayed in the layered shape in the up-down direction. ### Claim 4 (depends on 2) The cooling device as claimed in claim 2, wherein the ending edge pipe is positioned lower than a cooler of a bottom step among the plurality of coolers arrayed in the layered shape in the up-down direction. ### Claim 5 (depends on 2) The cooling device as claimed in claim 2, further comprising a connection member that is provided at the position of the bypass flow path connected to the top edge portion of the water-supply pipe, the connection member having a first opening extending toward the starting edge pipe, a second opening extending toward the ending edge pipe and a third opening extending toward the top edge side of the water-supply pipe, a first flow path and a second flow path being formed in the connection member, edge portions of the first flow path being the first opening and the second opening, the second flow path being branched from the first flow path, an edge portion of the second flow path being the third opening. ### Claim 6 (depends on 5) The cooling device as claimed in claim 5, wherein a flow path cross section area of the second flow path is less than a flow path cross section area of the first flow path. ### Claim 7 (depends on 2) The cooling device as claimed in claim 2, wherein a flow path cross section area of the bypass flow path is less than a flow path cross section area of a branch pipe branched from the water-supply path. ### Claim 8 (depends on 1) The cooling device as claimed in claim 1, wherein the position of the bypass flow path connected to the top edge portion of the water-supply pipe is higher than the plurality of coolers. ### Claim 9 (depends on 1) The cooling device as claimed in claim 1, wherein: the plurality of coolers are parallelized in a layered shape in an up-down direction; the water-supply pipe and the waste pipe extend in the up-down direction; the waste pipe has a starting edge pipe and an ending edge pipe, the starting edge pipe being branched at a bottom portion and acting as an upstream end of the bypass flow path, the ending edge pipe being branched at a bottom portion and acting as a downstream end of the bypass flow path; and the bypass flow path passes through a position connected to a top edge portion of the water-supply pipe and couples the starting edge pipe with the ending edge pipe. ### Claim 10 (depends on 9) The cooling device as claimed in claim 9, wherein a height position of the ending edge pipe is less than a height position of the starting edge pipe. ### Claim 11 (depends on 1) The cooling device as claimed in claim 1, wherein: the plurality of coolers are parallelized in a layered shape in a right-left direction; the water-supply pipe and the waste pipe extend along the right-left direction; the water-supply pipe has a starting edge pipe that is branched at a first edge portion thereof closer to the inlet and acts as an upstream end of the bypass flow path; the waste pipe has an ending edge pipe that is branched at a first edge thereof closer to the outlet and acts as a downstream end of the bypass flow path; and the bypass flow path passes through a position connected to a top edge portion of the water-supply pipe and couples the starting edge pipe with the ending edge pipe.