# US 10,371,465 B2 · Heat exchanger > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,371,465 B2 - Document ID: US10371465B2 - Status: Granted - Kind: B2 - Application number: 14/970,115 - Filed: 2015-12-15 - Published: 2016-06-16 - Granted: 2019-08-06 - Earliest claimed: 2014-12-16 - Assignees: Mahle International GmbH - Applicants: Mahle International GmbH - Inventors: Jens Richter; Bjoern Haller; Johannes Kaelber; Thomas Merten; Tobias Isermeyer - Web page: https://patentgrep.com/patent/US10371465B2 ## CPC - F28F 13/12: by creating turbulence, e.g. by stirring, by increasing the force of circulation (F28F13/08 takes precedence) - F28D 7/16: the conduits being arranged in parallel spaced relation ({F28D7/0008 - F28D7/0058 take precedence}; F28D7/02 - F28D7/10 take precedence) - F28F 1/128: {Fins with openings, e.g. louvered fins} - F28F 9/22: Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates - 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) ## Abstract A heat exchanger may include input-side and output-side tube plates and tubes supported therein, forming a first flow duct for a first medium. A housing may surround the tube plates and the tubes, forming a second flow duct for a second medium running between the tubes in the housing. The heat exchanger may further include at least one turbulence-generating insert arranged in the second flow duct between the tubes, the insert having ducts with permeable side walls for the second medium, and at least one dividing wall duct having closed side walls and being spaced apart at least at one longitudinal end from the housing. The at least one dividing wall duct may be designed to be open at both longitudinal ends, may be produced by a compression process, and may have a rising first flank and a second flank engaging below the second flank. ## Claims ### Claim 1 A heat exchanger comprising: an input-side tube plate and an output-side tube plate; tubes supported at respective longitudinal end sides in the input-side tube plate and the output-side tube plate forming a first flow duct for a first medium; a housing surrounding the tube plates and at least one tube forming a second flow duct for a second medium running between the tubes in the housing, the first and second mediums flowing parallel to each other, the housing having an inlet and an outlet; at least one turbulence-generating insert arranged in the second flow duct between the tubes, the at least one turbulence-generating insert having ducts with permeable side walls for the second medium; at least one dividing wall duct for each of the at least one turbulence-generating insert, the at least one dividing wall duct having closed side walls and being spaced apart at least at one longitudinal end from the housing; wherein the at least one dividing wall duct is open at both longitudinal ends such that a flow can pass therethrough; wherein the at least one dividing wall duct is produced by a compression process resulting in the at least one dividing wall duct having a rising first flank and a second flank, the rising first flank forming an obtuse angle with a portion of the bottom of the at least one turbulence-generating insert to which an end of the rising first flank is connected, the second flank forming an acute angle with another portion of the bottom of the at least one turbulence-generating insert to which an end of the second flank is connected, the rising first flank and the second flank connected to each other in a region of the top of the at least one turbulence-generating insert such that the rising first flank substantially overlaps the second flank; wherein the at least one dividing wall duct runs transverse to the ducts in the at least one turbulence-generating insert; and wherein the ends of the rising first flank and the second flank connected to the respective portions of the bottom of the at least one turbulence-generating insert are spaced apart from one another at a distance smaller than a maximum opening distance of the dividing wall duct formed between the rising first flank and the second flank. ### Claim 2 (depends on 1) The heat exchanger according to claim 1, wherein at least one of: the dividing wall duct has a cross sectional area A of 1.0 mm2≤A≤1.5 mm2; and the dividing wall duct has a hydraulic diameter dh of 0.30 mm≤dh≤0.40 mm. ### Claim 3 (depends on 2) The heat exchanger according to claim 2, wherein the cross sectional area A is 1.2 mm2. ### Claim 4 (depends on 2) The heat exchanger according to claim 2, wherein the hydraulic diameter dh is 0.361 mm. ### Claim 5 (depends on 2) The heat exchanger according to claim 2, wherein both the inlet and the outlet are arranged on an upper part of the housing, and the dividing wall duct runs substantially orthogonally from the upper part to a lower part of the housing. ### Claim 6 (depends on 1) The heat exchanger according to claim 1, wherein both the inlet and the outlet are arranged on an upper part of the housing, and the dividing wall duct runs substantially orthogonally from the upper part to a lower part of the housing. ### Claim 7 (depends on 6) The heat exchanger according to claim 6, wherein at least one of the upper part and the lower part of the housing has a protrusion in the region of the dividing wall duct. ### Claim 8 (depends on 7) The heat exchanger according to claim 7, wherein the protrusion extends in a direction away from the dividing wall duct such that the dividing wall duct is open at the at least one of the upper part and the lower part of the housing. ### Claim 9 (depends on 6) The heat exchanger according to claim 6, wherein the dividing wall duct is arranged in the region of the outlet. ### Claim 10 (depends on 6) The heat exchanger according to claim 6, wherein one distal end of the dividing wall duct is at a distance h from a lower edge of the turbulence-generating insert, and another distal end of the dividing wall duct is at a distance h1 from an upper edge of the turbulence-generating insert. ### Claim 11 (depends on 1) The heat exchanger according to claim 1, wherein the dividing wall duct is arranged in the region of the outlet. ### Claim 12 (depends on 1) The heat exchanger according to claim 1, wherein: one distal end of the dividing wall duct is at a distance h from a lower edge of the turbulence-generating insert and another distal end of the dividing wall duct is at a distance h1 from an upper edge of the turbulence-generating insert; or one distal end of the dividing wall duct is at a distance h from the lower edge of the turbulence-generating insert, another distal end of the dividing wall duct is aligned with the upper edge of the turbulence-generating insert, and a side wall of the dividing wall duct facing the inlet of the housing is notched in the region of the longitudinal end of the dividing wall duct facing an upper part of the housing. ### Claim 13 (depends on 1) The heat exchanger according to claim 1, wherein the dividing wall duct is at a distance B of 10 mm≤B≤60 mm from the input-side tube plate. ### Claim 14 (depends on 1) The heat exchanger according to claim 1, wherein the at least one turbulence-generating insert has a height H of 50 mm≤H≤96 mm, and the dividing wall duct is shorter by a height h of 3 mm≤h≤20 mm than the height H of the turbulence-generating insert. ### Claim 15 (depends on 14) The heat exchanger according to claim 14, further comprising a ratio H/h of 2.5≤H/h≤32. ### Claim 16 (depends on 1) The heat exchanger according to claim 1, wherein at least one of: the heat exchanger is a charge-air cooler, and the at least one turbulence-generating insert is a sheet-metal punched part. ### Claim 17 A heat exchanger for a first medium and a second medium, comprising: a turbulence-generating insert including a plurality of ducts having permeable side walls for the second medium; and at least one dividing wall duct having closed side walls and being open at both longitudinal ends such that the flow can pass therethrough, the at least one dividing wall duct running transverse to the plurality of ducts of the turbulence-generating insert; wherein one of: the dividing wall duct is shorter than the turbulence-generating insert, and distal ends of the dividing wall duct are spaced a distance from respective opposite edges of the turbulence-generating insert; or the dividing wall duct is shorter than the turbulence-generating insert with one distal end of the dividing wall duct aligned with one edge of the turbulence-generating insert, the dividing wall duct having a notched side wall; wherein the at least one dividing wall duct is produced by a compression process resulting in the at least one dividing wall duct having a rising first flank and a second flank, the rising first flank forming an obtuse angle with a portion of the bottom of the at least one turbulence-generating insert to which an end of the rising first flank is connected, the second flank forming an acute angle with another portion of the bottom of the at least one turbulence-generating insert to which an end of the second flank is connected, the rising first flank and the second flank connected to each other in a region of the top of the at least one turbulence-generating insert such that the rising first flank substantially overlaps the second flank; and wherein the ends of the rising first flank and the second flank connected to the respective portions of the bottom of the at least one turbulence-generating insert are spaced apart from one another at a distance smaller than a maximum opening distance of the dividing wall duct formed between the rising first flank and the second flank. ### Claim 18 (depends on 17) The heat exchanger according to claim 17, wherein the turbulence-generating insert has a height H of 50 mm≤H≤96 mm, and the dividing wall duct is shorter by a height h of 3 mm≤h≤20 mm than the height H of the turbulence-generating insert. ### Claim 19 (depends on 18) The heat exchanger according to claim 18, further comprising a ratio H/h of 2.5≤H/h≤32.