# US 11,994,332 B2 · Cooling unit > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,994,332 B2 - Document ID: US11994332B2 - Status: Granted - Kind: B2 - Application number: 17/381,253 - Filed: 2021-07-21 - Published: 2022-01-27 - Granted: 2024-05-28 - Earliest claimed: 2020-07-22 - Assignees: Nidec Corporation - Applicants: Nidec Corporation - Inventors: Takaya Okuno; Toshihiko Tokeshi; Takehito Tamaoka - Web page: https://patentgrep.com/patent/US11994332B2 ## CPC - F25D 17/02: for circulating liquids, e.g. brine - F25D 11/02: with cooling compartments at different temperatures - F25D 23/069: {Cooling space dividing partitions} - F28F 3/02: Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations (F28F3/08 takes precedence) - F28F 3/12: Elements constructed in the shape of a hollow panel, e.g. with channels {(F28D1/02, F28D1/03 take precedence)} - 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} - F28D 1/035: {with U-flow or serpentine-flow inside the conduits (F28D1/0341 takes precedence)} - F28D 2021/0028: {for cooling heat generating elements, e.g. for cooling electronic components or electric devices} - F28F 3/048: {in the form of ribs integral with the element or local variations in thickness of the element, e.g. grooves, microchannels} - F28F 21/065: {the heat-exchange apparatus employing plate-like or laminated conduits} - F28F 21/081: {Heat exchange elements made from metals or metal alloys} - H10W 40/47: by flowing liquids, e.g. forced water cooling - F25D: REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR (refrigerated showcases A47F3/04; thermally-insulated vessels for domestic use A47J41/00; refrigerated vehicles, see the appropriate subclasses of classes B60 - B64; containers with thermal insulation in general B65D81/38; heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants, or materials for the production of heat or cold by chemical reactions other than by combustion C09K5/00; thermally-insulated vessels for liquefied or solidified gases F17C; air-conditioning or air-humidification F24F; refrigeration machines, plants, or systems F25B; cooling of instruments or comparable apparatus without refrigeration G12B) - F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16) - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - F28D: HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT (fluid heaters having heat generating means and heat transferring means F24H; furnaces F27; details of heat-exchange apparatus of general) - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 ## Abstract A cooling assembly includes a cold plate in contact with a heat generating component, a housing on one side of the cooling assembly in a first direction with respect to the cold plate, a first wall located between the housing and the cold plate, and a second wall separating a plate chamber defined by the housing and the first wall into a first plate chamber and a second plate chamber adjacent to each other in a second direction orthogonal to the first direction. The first wall includes a first through hole opposing the cold plate in the first plate chamber and a second through hole opposing the cold plate in the second plate chamber. ## Claims ### Claim 1 A cooling assembly, comprising: a cold plate in contact with heat generating circuitry; a housing on one side of the cooling assembly in a first direction with respect to the cold plate; a first wall between the housing and the cold plate; and a second wall separating a plate chamber defined by the housing and the first wall into a first plate chamber and a second plate chamber adjacent in a second direction orthogonal to the first direction; wherein the housing includes an intermediate passage connecting the first plate chamber and the second plate chamber; the first wall includes: a first through hole opposing the cold plate in the first plate chamber; a second through hole opposing the cold plate in the second plate chamber and connecting the second plate chamber and the intermediate passage; and a third through hole connecting the first plate chamber and the intermediate passage; the intermediate passage is located between an end of the housing on the one side of the cooling assembly in the first direction and the first wall; and both of the first plate chamber and the second plate chamber are located between an end of the cold plate on another side of the cooling assembly in the first direction and the first wall. ### Claim 2 (depends on 1) The cooling assembly according to claim 1, wherein the first through hole is located at a center in the second direction or a center in a third direction orthogonal to the first direction and the second direction in the first plate chamber; and the second through hole is located at a center in the second direction or a center in the third direction in the second plate chamber. ### Claim 3 (depends on 1) The cooling assembly according to claim 1, wherein the housing includes: an inflow port into which liquid flows; and an outflow port through which the liquid flows out. ### Claim 4 (depends on 3) The cooling assembly according to claim 3, wherein the first wall and the second wall are portions of a single monolithic member. ### Claim 5 (depends on 3) The cooling assembly according to claim 3, further comprising: a third wall separating a communication flow path and the intermediate passage; wherein the third through hole is located between the second wall and the third wall in the second direction. ### Claim 6 (depends on 5) The cooling assembly according to claim 5, wherein the first wall and the third wall are portions of a single monolithic member. ### Claim 7 (depends on 5) The cooling assembly according to claim 5, wherein the third wall and the housing are portions of a single monolithic member. ### Claim 8 (depends on 5) The cooling assembly according to claim 5, further comprising: a pump; and a fourth wall; wherein the pump includes a motor, a casing, and an impeller; the impeller is housed in an impeller chamber defined by the fourth wall and the casing; the housing includes a pump inflow side flow path connecting the second plate chamber and the impeller chamber; and the fourth wall includes a suction port connecting the pump inflow side flow path and the impeller chamber. ### Claim 9 (depends on 8) The cooling assembly according to claim 8, wherein the inflow port and the outflow port are located on one side in the second direction with respect to the housing. ### Claim 10 (depends on 9) The cooling assembly according to claim 9, wherein the pump is on one side in the second direction of the cooling assembly; the inflow port, the communication flow path, the first plate chamber, the intermediate passage, the second plate chamber, the pump inflow side flow path, the impeller chamber, and the outflow port are connected in this order; and the communication flow path bypasses the intermediate passage and extends from the one side in the second direction to another side in the second direction. ### Claim 11 (depends on 1) The cooling assembly according to claim 1, wherein the cold plate includes fins on a surface of the cold plate on the one side in the first direction; the fins are located in at least one of the first plate chamber and the second plate chamber; and the first through hole or the second through hole is located on the one side in the first direction of the fins. ### Claim 12 (depends on 11) The cooling assembly according to claim 11, wherein the fins are arrayed in the second direction; and the second through hole extends in the second direction. ### Claim 13 A cooling assembly, comprising: a cold plate in contact with a heat generating circuitry; a housing on one side of the cooling assembly in a first direction with respect to the cold plate; a first wall between the housing and the cold plate; a second wall separating a plate chamber defined by the housing and the first wall into a first plate chamber and a second plate chamber adjacent in a second direction orthogonal to the first direction; a pump; and a fourth wall; wherein the housing includes an intermediate passage connecting the first plate chamber and the second plate chamber; the first wall includes: a first through hole opposing the cold plate in the first plate chamber; a second through hole opposing the cold plate in the second plate chamber and connecting the second plate chamber and intermediate passage; and a third through hole connecting the first plate chamber and the intermediate passage; the pump includes a motor, a casing, and an impeller; the impeller is housed in an impeller chamber defined by the fourth wall and the casing; the housing includes a pump inflow side flow path connecting the second plate chamber and the impeller chamber; the fourth wall includes a suction port connecting the pump inflow side flow path and the impeller chamber; and the first through hole and the third through hole are arranged to overlap in the second direction. ### Claim 14 (depends on 13) The cooling assembly according to claim 13, wherein the housing includes: an inflow port into which liquid flows; and an outflow port through which the liquid flows out. ### Claim 15 (depends on 14) The cooling assembly according to claim 14, further comprising: a third wall separating a communication flow path and the intermediate passage; wherein the third through hole is located between the second wall and the third wall in the second direction. ### Claim 16 (depends on 13) The cooling assembly according to claim 13, wherein the inflow port and the outflow port are located on one side in the second direction with respect to the housing. ### Claim 17 (depends on 16) The cooling assembly according to claim 16, wherein the pump is on one side in the second direction of the cooling assembly; the inflow port, the communication flow path, the first plate chamber, the intermediate passage, the second plate chamber, the pump inflow side flow path, the impeller chamber, and the outflow port are connected in this order; and the communication flow path bypasses the intermediate passage and extends from the one side in the second direction to another side in the second direction. ### Claim 18 (depends on 13) The cooling assembly according to claim 13, wherein the cold plate includes fins on a surface of the cold plate on the one side in the first direction; the fins are located in at least one of the first plate chamber and the second plate chamber; and the first through hole or the second through hole is located on the one side in the first direction of the fins. ### Claim 19 (depends on 18) The cooling assembly according to claim 18, wherein the fins are arrayed in the second direction; and the second through hole extends in the second direction. ### Claim 20 (depends on 13) The cooling assembly according to claim 13, further comprising: a third wall separating a communication flow path and the intermediate passage; wherein the third through hole is located between the second wall and the third wall in the second direction; the suction port is arranged to overlap the first through hole and the third through hole in the second direction; and the first through hole and the third through hole are located on opposite sides of the third wall in the second direction.