To provide a heat transfer tube combining refrigerant condensing performance and condensed refrigerant flow-through performance in a well-balanced manner, and having excellent assembling work efficiency without needing to worry about a mounting direction when manufacturing a condenser.
The heat transfer tube is exposed to an external fluid and exchanges heat between the external fluid and a refrigerant by changing the phase of the refrigerant flowing inside. The inner surface of the heat transfer tube is provided with a plurality of hydrophilic flow collecting parts collecting the flow of the refrigerant condensed in the flow direction of the refrigerant, and a plurality of water repellent parts preventing the wetting spread of the condensed refrigerant to move the refrigerant to the flow collecting parts. The flow collecting parts and the water repellent parts are alternately arranged in the circumferential direction of the heat transfer tube.
COPYRIGHT: (C)2008,JPO&INPIT
SATO IKU
KONO HARUHIKO
Hiroki Naito
Daisuke Nagano