Title:
TUBE FOR HEAT EXCHANGER HAVING GOOD BRAZING PROPERTY AND HEAT EXCHANGER
Document Type and Number:
Japanese Patent JP2023064350
Kind Code:
A
Abstract:
To provide a tube for a heat exchanger which prevents peeling-off and exfoliation of brazing composition coating from occurring during assembling and does not generate residue, and a heat exchanger including the tube.SOLUTION: In a tube for a heat exchanger, a plurality of plate-shaped fins having a plurality of groove parts or hole parts are arranged at prescribed interval, and the tube is composed of a tube body fit into the groove parts or the hole parts formed in each of the fins. 60 to 20,000 recesses each inscribed in a circle of 5 to 40 μm in circle-equivalent diameter are formed in an outer surface of the tube body per 1 mm2, where an area ratio of the recesses is 5 to 50%. The outer surface is coated with a brazing composition coating which is prepared by adding a binder to either of brazing powder and fluorine flux or a mixture of both.SELECTED DRAWING: Figure 1
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Inventors:
KUROKI TOSHIHIRO
NAKANISHI SHIGENORI
NAKANISHI SHIGENORI
Application Number:
JP2021174584A
Publication Date:
May 11, 2023
Filing Date:
October 26, 2021
Export Citation:
Assignee:
MA ALUMINUM CORP
International Classes:
F28F1/12; F28F1/32
Attorney, Agent or Firm:
Yasushi Matsunuma
Mitsuo Teramoto
Fumihiro Hosokawa
Kazunori Onami
Mitsuo Teramoto
Fumihiro Hosokawa
Kazunori Onami