Title:
伝熱管、熱交換器および伝熱管の製造方法
Document Type and Number:
Japanese Patent JP6846182
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a heat transfer pipe that is capable of stable production free from cracks and wrinkles at the time of hairpin processing of assembling a heat exchanger with a heat transfer pipe.SOLUTION: An aluminum heat transfer pipe 10 that is a twisted material of an extruded material pipe includes a plurality of fins helically formed inside the inner peripheral surface thereof and is formed with a helical die mark DM at the outer peripheral surface thereof. In the heat transfer pipe 10, the die mark DM has a maximum depth of 35 μm or less.SELECTED DRAWING: Figure 5
Inventors:
Yusuke Nakaura
Hateruma Yuki
Hateruma Yuki
Application Number:
JP2016233309A
Publication Date:
March 24, 2021
Filing Date:
November 30, 2016
Export Citation:
Assignee:
Mitsubishi Aluminum Co., Ltd.
International Classes:
B21C23/10; B21C1/22; B21D53/06; F28F1/40
Domestic Patent References:
| JP2016022505A | ||||
| JP2014142174A | ||||
| JP2016032816A | ||||
| JP3057510A | ||||
| JP2013014797A |
Attorney, Agent or Firm:
Yasushi Matsunuma
Mitsuo Teramoto
Fumihiro Hosokawa
Kazunori Onami
Masatake Shiga
Mitsuo Teramoto
Fumihiro Hosokawa
Kazunori Onami
Masatake Shiga