The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 27, 2025
Filed:
May. 12, 2022
Applicant:
Daikin Industries, Ltd., Osaka, JP;
Inventors:
Ken Satou, Osaka, JP;
Tomohiko Sakamaki, Osaka, JP;
Kengo Uchida, Osaka, JP;
Yoshio Oritani, Osaka, JP;
Assignee:
DAIKIN INDUSTRIES, LTD., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F28D 1/053 (2006.01); F25B 13/00 (2006.01); F25B 39/00 (2006.01); F25B 39/02 (2006.01); F28D 21/00 (2006.01); F28F 1/02 (2006.01); F28F 1/12 (2006.01); F28F 1/40 (2006.01);
U.S. Cl.
CPC ...
F28D 1/05391 (2013.01); F25B 13/00 (2013.01); F25B 39/00 (2013.01); F25B 39/028 (2013.01); F28F 1/022 (2013.01); F28F 1/128 (2013.01); F28F 1/40 (2013.01); F28D 2021/0068 (2013.01); F28F 2215/12 (2013.01);
Abstract
A heat transfer tube includes first flow paths aligned in the heat transfer tube. Each of the first flow paths includes a section with a rectangular shape that is elongated in a first direction parallel with an alignment direction of the first flow paths. Each of the first flow paths includes protrusions disposed on an inner surface. The section of each of the first flow paths has a long side having a first length and a short side having a second length, where a ratio of the first length to the second length is between 1.1 and 1.5.