# US 12,225,693 B2 · Server packaging for immersion cooling with local acceleration > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,225,693 B2 - Document ID: US12225693B2 - Status: Granted - Kind: B2 - Application number: 17/699,490 - Filed: 2022-03-21 - Published: 2023-09-21 - Granted: 2025-02-11 - Earliest claimed: 2022-03-21 - Assignees: Baidu USA LLC - Applicants: Baidu USA LLC - Inventors: Tianyi Gao - Web page: https://patentgrep.com/patent/US12225693B2 ## CPC - H05K 7/208: {Liquid cooling with phase change} - H05K 7/20809: {within server blades for removing heat from heat source} - H05K 7/203: {by immersion} - H05K 7/20409: {Outer radiating structures on heat dissipating housings, e.g. fins integrated with the housing} - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS ## Abstract A cooling unit includes a channel frame assembled to a server chassis to form a region enclosing an electronic chip that is disposed on a server board contained within the server chassis, an inlet port coupled to a first side of the channel frame to receive a coolant fluid, an outlet port coupled to a second side of the channel frame for coolant fluid in either a liquid phase or a vapor phase to exit the channel frame, and an internal structure disposed on an inner surface of the channel frame between the inlet port and the outlet port. The internal structure guides the coolant fluid flow and/or distribution along a surface of the electronic chip, where the electronic chip transfers heat to the coolant fluid to cause a portion of the coolant fluid to change from a liquid to a vapor phase. ## Claims ### Claim 1 A cooling unit, comprising: a channel frame assembled to a server chassis to form a region enclosing an electronic chip that is disposed on a server board contained within the server chassis; an inlet port coupled to a first side of the channel frame to receive a two-phase coolant fluid; an outlet port coupled to a second side of the channel frame for the two-phase coolant fluid in either a liquid phase or a vapor phase to exit the channel frame; an internal structure disposed on an inner surface of the channel frame between the inlet port and the outlet port, wherein the internal structure guides the two-phase coolant fluid along a surface of the electronic chip, wherein the electronic chip transfers heat to the two-phase coolant fluid to cause a portion of the two-phase coolant fluid to change from a liquid to a vapor phase; and a flexible skirt surrounding the channel frame and in contact with the server board, wherein the flexible skirt minimizes leakage of the two-phase coolant through gaps between the cooling unit and the server board. ### Claim 2 (depends on 1) The cooling unit of claim 1, wherein the internal structure comprises a set of fins, each fin of the set of fins aligned along a length between the inlet and outlet ports to form a plurality of fluid channels, wherein the set of fins is asymmetrical or symmetrical to the internal structure, wherein the plurality of fluid channels directs the two-phase coolant fluid to flow unevenly or evenly along the surface of the electronic chip. ### Claim 3 (depends on 1) The cooling unit of claim 1, wherein the internal structure comprises a layer with perforated openings facing the surface of the electronic chip. ### Claim 4 (depends on 1) The cooling unit of claim 1, wherein the server chassis is submerged in an immersion fluid. ### Claim 5 (depends on 4) The cooling unit of claim 4, wherein the outlet port is an open perforation, the two-phase coolant fluid is a same fluid as an immersion fluid, and the two-phase coolant fluid that exits the channel frame merges with the immersion fluid. ### Claim 6 (depends on 4) The cooling unit of claim 4, wherein the outlet port is coupled to a connector connecting the outlet port to a fluid line, the two-phase coolant fluid is a different fluid than the immersion fluid, and the fluid line directs the two-phase coolant fluid that exits the channel frame to a facility cooler. ### Claim 7 (depends on 1) The cooling unit of claim 1, further comprising an assembly kit that is used to secure the channel frame to the server chassis. ### Claim 8 (depends on 1) The cooling unit of claim 1, further comprising a server chassis extension secured to the server chassis, the server chassis extension extends a length of the server chassis and an assembly kit is secured to the chassis extension, wherein the assembly kit is used to secure the channel frame to the chassis extension. ### Claim 9 (depends on 8) The cooling unit of claim 8, wherein the assembly kit comprises a first assembly structure disposed on the server chassis near the inlet port and a second assembly structure disposed on the server chassis near the outlet port, wherein the first and second assembly structures are used to secure the channel frame to the server chassis. ### Claim 10 A server, comprising: a server chassis securing a server board within the server chassis; and a cooling unit, comprising: a channel frame assembled to the server chassis to form a region enclosing an electronic chip that is disposed on the server board; an inlet port coupled to a first side of the channel frame to receive a two-phase coolant fluid; an outlet port coupled to a second side of the channel frame for the two-phase coolant fluid in either a liquid phase or a vapor phase to exit the channel frame; an internal structure disposed on an inner surface of the channel frame between the inlet port and the outlet port, wherein the internal structure guides the two-phase coolant fluid along a surface of the electronic chip, wherein the electronic chip transfers heat to the two-phase coolant fluid to cause a portion of the two-phase coolant fluid to change from a liquid to a vapor phase; and a flexible skirt surrounding the channel frame and in contact with the server board, wherein the flexible skirt minimizes leakage of the two-phase coolant through gaps between the cooling unit and the server board. ### Claim 11 (depends on 10) The server of claim 10, wherein the internal structure comprises a set of fins, each fin of the set of fins aligned along a length between the inlet and outlet ports to form a plurality of fluid channels, wherein the set of fins is asymmetrical or symmetrical to the internal structure, wherein the plurality of fluid channels directs the two-phase coolant fluid to flow unevenly or evenly along the surface of the electronic chip. ### Claim 12 (depends on 10) The server of claim 10, wherein the internal structure comprises a layer with perforated openings facing the surface of the electronic chip. ### Claim 13 (depends on 10) The server of claim 10, wherein the server chassis is submerged in an immersion fluid. ### Claim 14 (depends on 13) The server of claim 13, wherein the outlet port is an open perforation, the two-phase coolant fluid is a same fluid as an immersion fluid, and the two-phase coolant fluid that exits the channel frame merges with the immersion fluid. ### Claim 15 (depends on 13) The server of claim 13, wherein the outlet port is coupled to a connector connecting the outlet port to a fluid line, the two-phase coolant fluid is a different fluid than the immersion fluid, and the fluid line directs the two-phase coolant fluid that exits the channel frame to a facility cooler. ### Claim 16 (depends on 10) The server of claim 10, further comprising an assembly kit that is used to secure the channel frame to the server chassis. ### Claim 17 (depends on 10) The server of claim 10, further comprising a server chassis extension secured to the server chassis, the server chassis extension extends a length of the server chassis and an assembly kit is secured to the chassis extension, wherein the assembly kit is used to secure the channel frame to the chassis extension. ### Claim 18 (depends on 17) The server of claim 17, wherein the assembly kit comprises a first assembly structure disposed on the server chassis near the inlet port and a second assembly structure disposed on the server chassis near the outlet port, wherein the first and second assembly structures are used to secure the channel frame to the server chassis. ### Claim 19 A cooling system, comprising: one or more servers, each server of the one or more servers comprising: a server chassis securing a server board within the server chassis; and a cooling unit, comprising: a channel frame assembled to the server chassis to form a region enclosing an electronic chip that is disposed on the server board; an inlet port coupled to a first side of the channel frame to receive a two-phase coolant fluid; an outlet port coupled to a second side of the channel frame for the two-phase coolant fluid in either a liquid phase or a vapor phase to exit the channel frame; an internal structure disposed on an inner surface of the channel frame between the inlet port and the outlet port, wherein the internal structure guides the two-phase coolant fluid along a surface of the electronic chip, wherein the electronic chip transfers heat to the two-phase coolant fluid to cause a portion of the two-phase coolant fluid to change from a liquid to a vapor phase; and a flexible skirt surrounding the channel frame and in contact with the server board, wherein the flexible skirt minimizes leakage of the two-phase coolant through gaps between the cooling unit and the server board. ### Claim 20 (depends on 19) The cooling system of claim 19, wherein the internal structure comprises a set of fins, each fin of the set of fins aligned along a length between the inlet and outlet ports to form a plurality of fluid channels, wherein the set of fins is asymmetrical or symmetrical to the internal structure, wherein the plurality of fluid channels directs the two-phase coolant fluid to flow unevenly or evenly along the surface of the electronic chip.