Title:
螺旋状波形溝付管の製造方法
Document Type and Number:
Japanese Patent JP6818536
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a tube with a spirally corrugated groove which has high heat transfer performance, a heat exchanger which uses the tube with the groove, and a method of manufacturing the tube with the spirally corrugated groove that can easily perform molding processing on the tube with the groove with a small man-hour.SOLUTION: A tube with a spirally corrugated groove is characterized in that: a circular tube is provided, on its outer peripheral surface 10, with a radially two-staged deformation part consisting of at least one groove part 11 in a spirally corrugated shape along a longer direction of the circular tube and a radially outer deformation part (hollow 12) of the circular tube formed continuously in a bottom part longer direction of the groove part, and also provided, on its inner peripheral surface 20, with a radially two-staged deformation part consisting of a projection part 21 in a spirally corrugated shape corresponding to the groove part and a radially inner deformation part (projection part 22) formed at the projection part, corresponding to the outer deformation part, and intermittent in a longer direction.SELECTED DRAWING: Figure 1
Inventors:
Shinsuke Nakahata
Miyagawa Yudai
Toru Koide
Tonegawa Tohru
Takashi Oi
Miyagawa Yudai
Toru Koide
Tonegawa Tohru
Takashi Oi
Application Number:
JP2016243947A
Publication Date:
January 20, 2021
Filing Date:
December 16, 2016
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
F28D7/02; B21D15/04; B21D17/04; B21D51/12; F28F1/42
Domestic Patent References:
| JP2009270755A | ||||
| JP61289293A | ||||
| JP62242795A | ||||
| JP2009056479A | ||||
| JP2008261566A |
Foreign References:
| US20080029243 |
Attorney, Agent or Firm:
Patent Business Corporation Parumo Patent Office
Masuo Oiwa
Keigo Murakami
Kenji Yoshizawa
Masuo Oiwa
Keigo Murakami
Kenji Yoshizawa