# US 2014/0151011 A1 · Heat exchanger and method of manufacturing the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0151011 A1 - Document ID: US20140151011A1 - Status: Published application - Kind: A1 - Application number: 14/086,133 - Filed: 2013-11-21 - Published: 2014-06-05 - Earliest claimed: 2012-11-30 - Inventors: Juhyok KIM; Hanchoon LEE - Web page: https://patentgrep.com/patent/US20140151011A1 ## CPC - B23P 15/26: heat exchangers {or the like (making heat exchangers by methods covered by other subclasses B21D53/02)} - F28D 1/0477: {the conduits being bent in a serpentine or zig-zag} - F28F 1/10: Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses (crimped or corrugated elements F28F1/06, F28F1/08) - F28F 1/24: and extending transversely (F28F1/38 takes precedence) - B23K 1/0012: {Brazing of heat exchangers} - F28F 2275/04: by brazing - F28F 2275/125: by bringing elements together and expanding - Y10T 29/4935: Heat exchanger or boiler making - B23P: METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS (arrangements for copying or controlling B23Q) - 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) - F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16) - B23K: SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A heat exchanger and a method of manufacturing the same are provided. With the heat exchanger and method of manufacturing, a tube may be inserted into a through hole formed in a fin coated with a filler metal, the tube may be expanded using a tube expansion ball, and the tube and the fin may be joined through the filler metal by brazing processing. The tube may be made of aluminum (Al). An interval between an outer circumferential surface of the tube and an inner circumferential surface of the fin collar before expanding the tube may be approximately 0.1 mm or more, and the tube may be expanded so that the interval between the outer circumferential surface of the tube and the inner circumferential surface of the fin collar is approximately 0.1 mm or less. Accordingly, a heat transfer performance of the heat exchanger may be improved. ## Claims ### Claim 1 A method of manufacturing a heat exchanger, the method comprising: inserting a tube into a through hole formed in at least one fin coated with a filler metal; expanding the tube; and joining the tube and the at least one fin through the filler metal by brazing processing. ### Claim 2 (depends on 1) The method of claim 1, wherein the tube is made of aluminum (Al). ### Claim 3 (depends on 2) The method of claim 2, wherein the at least one fin is made of Al. ### Claim 4 (depends on 1) The method of claim 1, wherein an interval between an outer circumferential surface of the tube and an inner circumferential surface of a fin collar of the at least one fin before expanding the tube is approximately 0.1 mm or more. ### Claim 5 (depends on 4) The method of claim 4, wherein the fin collar extends at a substantially 90° angle with respect to a central longitudinal axis of the at least one fin. ### Claim 6 (depends on 4) The method of claim 4, wherein the filler metal is coated on an inner circumferential surface of the fin collar ### Claim 7 (depends on 1) The method of claim 1, wherein the expanding of the tube comprises expanding the tube so that an interval between an outer circumferential surface of the tube and an inner circumferential surface of a fin collar of the at least one fin is approximately 0.1 mm or less. ### Claim 8 (depends on 7) The method of claim 7, wherein the fin collar extends at a substantially 90° angle with respect to a central longitudinal axis of the at least one fin. ### Claim 9 (depends on 1) The method of claim 1, wherein the filler metal is coated on only one surface of the at least one fin. ### Claim 10 (depends on 9) The method of claim 9, wherein the filler metal is coated on only a portion of the at least one fin where the through hole is formed. ### Claim 11 (depends on 1) The method of claim 1, wherein expanding the tube comprises expanding the tube using a tube expansion ball. ### Claim 12 (depends on 1) A heat exchanger manufactured using the method of claim 1. ### Claim 13 A heat exchanger, comprising: a tube having a plurality of grooves formed within the tube and deformed by expanding the tube; and a plurality of fins each configured to have at least one through hole formed in the respective fin, wherein the tube is inserted into the through hole and each of the plurality of fins has a fin collar vertically bent near the through hole, wherein the plurality of fins into which the tube is inserted is disposed in parallel at an interval corresponding to a height of the respective fin collar, and wherein an inner circumferential surface of each fin collar is joined with an outer circumferential surface of the tube by a filler metal. ### Claim 14 (depends on 13) The heat exchanger of claim 13, wherein the tube is made of aluminum (Al). ### Claim 15 (depends on 14) The heat exchanger of claim 14, wherein the plurality of fins is made of Al. ### Claim 16 (depends on 13) The heat exchanger of claim 13, wherein an interval between the outer circumferential surface of the tube and the inner circumferential surface of each fin collar is approximately 0.1 mm or less. ### Claim 17 (depends on 13) The heat exchanger of claim 13, wherein the filler metal is coated on only one surface of each of the plurality of fins. ### Claim 18 (depends on 17) The heat exchanger of claim 17, wherein the filler metal is coated on only a portion of each fin where the through hole is formed. ### Claim 19 (depends on 17) The heat exchanger of claim 17, wherein the filler metal is coated on an inner circumferential surface of the fin collar of each of the plurality of fins. ### Claim 20 (depends on 13) The heat exchanger of claim 13, wherein the fin collar extends at a substantially 90° angle with respect to a central longitudinal axis of the respective fin.