Heat transfer tube having improved heat transfer property and production unit and manufacture thereof

Abstract

Abstract PURPOSE: To develop a heat transfer tube for heat exchanger excellent in heat transferability by forming a groove with fabricating a fin of an outer face of a heat transfer tube in a heat exchanger having a heat transfer tube in which a fluid to be cooled passes through its inside and a coolant as a boiling fluid is brought into contact with its outside. CONSTITUTION: In the case of manufacturing the heat transfer tube used for a heat exchanger, after a mandrel 30 is inserted in the inside of a metal tube 10, the tube is fabricated with pressing a tool arbor 20 on an outer face of the metal tube while rotating around a longitudinal axis. The tool arbor 20 is provided with a disk 24 for fin forming, a disk 26 with roller and a disk 28 with notch, Fins having a tip part 13 and a root part 17 are formed in many on a metal tube surface. The fins are bent by plural disk 26 with roller, is brought into contact with a tip part of adjacent fins and then grooves 16 are made holes. There are many holes on a surface of the heat transfer tube, by connecting these holes to an outside space by the groove 16, the heat transfer tube for heat exchanger excellent in heat transferability is produced.

Inventors

• 👤 Aaru Zoora Suteiibun

Bibliographic Details