| US 7,341,099 B2 | ||
| Metal plate for producing flat tube, flat tube and process for producing the flat tube | ||
| Satoru Kaimura, Oyama (Japan); Yasuji Kawamata, Oyama (Japan); Takashi Tamura, Oyama (Japan); Ryoichi Hoshino, Oyama (Japan); and Noboru Ogasawara, Oyama (Japan) | ||
| Assigned to Showa Denko K.K., Tokyo (Japan) | ||
| Appl. No. 10/479,860 PCT Filed Jun. 06, 2002, PCT No. PCT/JP02/05575 § 371(c)(1), (2), (4) Date Dec. 08, 2003, PCT Pub. No. WO02/100567, PCT Pub. Date Dec. 19, 2002. |
||
| Claims priority of provisional application 60/307164, filed on Jul. 24, 2001. | ||
| Claims priority of application No. 2001-174459 (JP), filed on Jun. 08, 2001. | ||
| Prior Publication US 2004/0244196 A1, Dec. 09, 2004 | ||
| Int. Cl. F28F 1/02 (2006.01); B23P 15/26 (2006.01) | ||
| U.S. Cl. 165—152 [165/177; 165/183; 29/890.049; 29/890.053; 29/521] | 3 Claims |
| 1. A flat tube comprising:
first and second flat walls opposing each other;
first and second side walls connecting opposite side edges of the first and second flat walls; and
a plurality of reinforcing walls connecting the first and second flat walls and extending in a longitudinal direction of the
first and second flat walls, the reinforcing walls forming a plurality of fluid channels between the first and second flat
walls,
wherein the first side wall comprises a joint portion connecting the first and second flat walls and forming a hairpin shape
with the first and second flat walls, the second side wall comprises a side wall forming portion projecting from the first
flat wall and a side wall forming portion projecting from the second flat wall, respectively, and the side wall forming portion
in the first flat wall is intimately fitted with the side wall forming portion in the second flat wall, the reinforcing walls
comprise reinforcing wall forming portions projecting from the first flat wall and reinforcing wall forming portions projecting
from the second flat wall, respectively, the reinforcing wall forming portions in the first and second flat walls have engaging
portions, respectively, the engaging portions are configured to be intimately fitted with each other when the reinforcing
wall forming portions in the first flat wall are butted against the reinforcing wall forming portions in the second flat wall,
the reinforcing wall forming portions in the first flat wall are brazed to the reinforcing wall forming portions in the second
flat wall, and the first and second flat wall forming portions, the side wall forming portions and the reinforcing wall forming
portions comprise a metal plate comprising an aluminum brazing sheet, the side wall forming portions and the reinforcing wall
forming portions are formed on a brazing material bearing surface of the aluminum brazing sheet, and the side wall forming
portions and the reinforcing wall forming portions include brazing material layers, respectively.
|