# US 12,218,028 B2 · Venturi-effect heat-transfer device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,218,028 B2 - Document ID: US12218028B2 - Status: Granted - Kind: B2 - Application number: 17/911,348 - Filed: 2021-02-19 - Published: 2023-02-23 - Granted: 2025-02-04 - Earliest claimed: 2020-03-13 - Assignees: Safran; Safran Electronics & Defense - Applicants: Safran; Safran Electronics & Defense - Inventors: Toni Youssef; Stéphane Joseph Azzopardi; Jean-Christophe Riou - Web page: https://patentgrep.com/patent/US12218028B2 ## CPC - H10W 40/228: {the projecting parts being wire-shaped or pin-shaped} - F28F 1/16: the means being integral with the element, e.g. formed by extrusion (F28F1/22 takes precedence) - 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 13/08: by varying the cross-section of the flow channels - H10W 40/255: {having a laminate or multilayered structure, e.g. direct bond copper [DBC] ceramic substrates} - H10W 40/43: by flowing gases, e.g. forced air cooling - F28D 2021/0029: {Heat sinks} - F28F 3/022: {the means being wires or pins} - F28F 3/06: the means being attachable to the element - F28F 2215/06: Hollow fins; fins with internal circuits - F28F 2215/10: Secondary fins, e.g. projections or recesses on main fins - H05K 7/209: {Heat transfer by conduction from internal heat source to heat radiating structure (H05K7/20909 takes precedence)} - H10W 40/22: characterised by their shape, e.g. having conical or cylindrical projections - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 - F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16) - 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) - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS ## Abstract The invention relates to a device (2) for transferring heat from a thermally conductive plate (30) capable of capturing the heat from a zone placed on a first side (32) of the plate, the device comprising at least one fin (35) placed on a second side (34) of the plate (30) opposite the first side (32) and having a duct (36) extending in a longitudinal direction (L) between a first end (38) connected to the plate and a second end (40) opposite the first end and which opens out, the duct (36) being connected to at least one Venturi-effect neck (42) bringing cooling air into the duct, the neck (42) being formed in the vicinity of the first end of the duct and the plate (30). ## Claims ### Claim 1 A device (2) for transferring heat comprising: a thermally conductive plate (30) capable of capturing the heat from a zone placed on a first side (32) of the plate (30), at least one fin (35) placed on a second side (34) of said plate (30) opposite to the first side (32), said at least one fin including; a conduit (36) extending in a longitudinal direction (L) between a first end (38) connected to said plate and a second end (40) opposite to the first end and which opens out, a plurality of wall elements extending laterally from said conduit and forming at least one Venturi-effect neck (42) for supplying cooling air into the conduit through at least one orifice in the conduit, said Venturi-effect neck (42) being formed in the vicinity of the first end of said conduit and of said plate. ### Claim 2 (depends on 1) The device according to claim 1, wherein said plurality of wall elements comprises at least one first wall element (44) extending laterally from said conduit (36) and along the length of said conduit (36) in the longitudinal direction (L). ### Claim 3 (depends on 2) The device according to claim 2, wherein each first wall element (44) extends to the second end of said conduit (36). ### Claim 4 (depends on 2) The device according to claim 2, wherein the dimension of each first wall element (44) in a direction perpendicular to the longitudinal direction (L) is comprised between 3 mm and 10 mm. ### Claim 5 (depends on 3) The device according to claim 3, wherein each first wall element (44) comprises a first face (46) forming, with a second opposite face (50), said Venturi-effect neck (42). ### Claim 6 (depends on 5) The device according to claim 5, wherein the plurality of wall elements comprises at least one second wall element (48) formed in contact with the plate and carrying said second face (50). ### Claim 7 (depends on 5) The device according to claim 5, wherein, in a plane containing the longitudinal direction (L) and passing through said first face (46) and said second face (50), the angle between said first face (46) and said second face (50) measured in this plane is comprised between 0 and 45°. ### Claim 8 (depends on 6) The device according to claim 6, wherein each first wall element (44) is associated with a second distinct wall element (48) extending laterally from the conduit (36), each second wall element (48) comprising said second face (50). ### Claim 9 (depends on 6) The device according to claim 6, wherein the dimension of the at least one second wall element (48) in the longitudinal direction (L) is strictly greater than 0 and less than or equal to 0.05 mm. ### Claim 10 (depends on 6) The device according to claim 6, wherein the dimension of each second wall element (48) in a direction perpendicular to the longitudinal direction is comprised between 3 mm and 10 mm. ### Claim 11 (depends on 1) The device according to claim 1, wherein the plurality of wall elements comprises a plurality of first wall elements (44) that are regularly distributed around the longitudinal direction (L). ### Claim 12 (depends on 1) The device according to claim 1, wherein the conduit (36) has the shape of a straight cylinder. ### Claim 13 (depends on 12) The device according to claim 12, wherein the greatest width inside the conduit (36) in a direction perpendicular to the longitudinal direction (L) is comprised between 5 and 20 mm. ### Claim 14 (depends on 1) The device according to claim 1, wherein said Venturi-effect neck (42) opens out at an orifice (43) of the conduit (36), this orifice (43) having a length in the longitudinal direction (L) which is comprised between 0.1 and 1.5 mm, and a width in a perpendicular direction comprised between 0.1 and 1 mm. ### Claim 15 (depends on 1) The device according to claim 1, wherein the dimension of the conduit (36) in the longitudinal direction (L) is comprised between 10 and 30 mm. ### Claim 16 (depends on 1) The device according to claim 1, wherein said fin (35) comprises at least one blade (52) extending projectingly inside the conduit (36). ### Claim 17 (depends on 16) The device according to claim 16, wherein said fin (35) comprises a plurality of annular rows of blades (52) spaced longitudinally from each other. ### Claim 18 (depends on 17) The device according to claim 17, wherein said blades (52) of each annular row extend radially and are regularly distributed about the longitudinal axis. ### Claim 19 (depends on 1) The device according to claim 1, comprising a plurality of fins (35). ### Claim 20 (depends on 1) The device according to claim 1, wherein said plate (30) comprises a metallized ceramic substrate. ### Claim 21 (depends on 1) An assembly comprising the device according to claim 1, wherein a power electronic module (2) is applied on said first side of said plate (30). ### Claim 22 (depends on 1) A method for installing the device according to claim 1, wherein said device is oriented so that said second end (40) of said conduit (36) is upwards.