RADIATOR AND METHOD FOR MANUFACTURING RADIATOR

• US 20150060027A1
• Filed: 07/07/2014
• Published: 03/05/2015
• Est. Priority Date: 08/30/2013
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: TAWA, Fumihiro
• Granted Patent: US 9,784,504 B2
• Time in Patent Office: Days
• US Class Current: 165/143
• CPC Class Codes: B21D 53/02 heat exchangers or parts thereof, e.g. radiators, condensers fins, headersmaking finned or ribbed tubes by fixing strip material or the like to tubes B21C37/22
• CPC Class Codes: F28D 1/0471 the conduits having a non-circular cross-section F28D1/0473, F28D1/0476, F28D1/0478 take precedence
• CPC Class Codes: F28D 1/0476 the conduits having a non-circular cross-section
• CPC Class Codes: F28D 2021/0031 Radiators for recooling a coolant of cooling systems
• CPC Class Codes: F28F 1/022 with multiple channels
• CPC Class Codes: F28F 1/025 with variable shape, e.g. with modified tube ends, with different geometrical features F28F1/06, F28F1/08, F28F9/16, F28F9/18 take precedence
• CPC Class Codes: F28F 1/045 with assemblies of stacked elements
• CPC Class Codes: F28F 1/12 the means being only outside the tubular element
• CPC Class Codes: F28F 1/126 consisting of zig-zag shaped fins F28F1/105 takes precedence
• CPC Class Codes: F28F 2255/16 extruded
• CPC Class Codes: F28F 9/0202 Header boxes having their inner space divided by partitions
• CPC Class Codes: F28F 9/182 the heat-exchange conduits having ends with a particular shape, e.g. deformed; the heat-exchange conduits or end plates having supplementary joining means, e.g. abutments
• CPC Class Codes: H01L 23/473 by flowing liquids H01L23/4332, H01L23/4338 take precedence
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: Y10T 29/49378 Finned tube

Abstract

A radiator includes a tube that has a flattened-shape, the tube including an internal flow channel that allows a coolant to flow through the internal flow channel; and a tank that includes an insertion port into which a joint end portion of the tube is inserted so that the tank and the tube are joined to each other, wherein the tube includes an outer-peripheral-wall extending in a direction perpendicular to a thickness direction of the tube, and bend depressions that are bent toward the internal flow channel in a concave shape are formed in at least a region of the outer-peripheral-wall adjacent to the joint end portion, the bend depressions extending along the internal flow channel, and the bend depressions are deformed in a width direction of the tube so that the width of the joint end portion is the same as the width of the insertion port.

Claims

1. A radiator comprising:

a tube that has a flattened shape, the tube including an internal flow channel that allows a coolant to flow through the internal flow channel; and

a tank that includes an insertion port into which a joint end portion of the tube is inserted so that the tank and the tube are joined to each other,

wherein the tube includes an outer peripheral wall extending in a direction perpendicular to a thickness direction of the tube, and one or more bend depressions that are bent toward the internal flow channel in a concave shape are formed in at least a region of the outer peripheral wall adjacent to the joint end portion, the one or more bend depressions extending along the internal flow channel, and

wherein the one or more bend depressions are deformed in a width direction of the tube so that the width of the joint end portion is the same as the width of the insertion port.

2. The radiator according to claim 1,

wherein the outer peripheral wall includes two of peripheral walls, the bend depressions are disposed in the two of peripheral walls so as to face each other with the internal flow channel between the two of peripheral walls.

3. The radiator according to claim 2,

wherein each of the two of peripheral walls includes the one or more bend depressions, and two of the bend depressions facing each other includes respective top end protrusions that protrude toward the internal flow channel to form a partition wall by causing the respective top end protrusions to be brought into contact with each other, and

wherein the internal flow channel is partitioned by the partition wall.

4. The radiator according to claim 2,

wherein an integral partition wall integrally formed with the tube is disposed so as to separate the bend depressions arranged in the width direction of the tube.

5. The radiator according to claim 1,

wherein the one or more bend depressions are formed at least an end region of the tube in the width direction of the tube.

6. The radiator according to claim 5,

wherein the one or more bend depressions are formed across the entire width of the tube.

7. A method for manufacturing a radiator comprising:

forming a tube that has a flattened shape, the tube including an internal flow channel that allows a coolant to flow through the internal flow channel; and

joining the tube to a tank with a joint end portion of the tube inserted into an insertion port of the tank,

wherein the tube includes an outer peripheral wall extending in a direction perpendicular to a thickness direction of the tube, and the forming further includes forming one or more bend depressions that are bent toward the internal flow channel in a concave shape in at least a region of the outer peripheral wall adjacent to the joint end portion, the one or more bend depressions extending along the internal flow channel, and

wherein the method further comprises, between the forming and the joining, deforming the one or more bend depressions in a width direction of the tube so that the width of the joint end portion is the same as the width of the insertion port.