HEAT TRANSFER PIPE HAVING FIN WITH CLOSED CROSS SECTION

摘要

PURPOSE: A heat pipe including inner pins is provided to be used as an inner heat pipe of a double layered pipe heat exchanger when the thickness of the pin is adjusted. CONSTITUTION: A heat pipe including an inner pin comprises a main tube and inner pins(200). The exterior side of the inner pins forms protrusion parts(210) and depression parts(220) so that the protrusion part can be in contact with the inner side of the main tube. A plurality of inner pins is formed for one end of the inner pin to be in contact with the other end. One protrusion part of one inner pin and the depression part of the inner pin are matched to be reciprocally counterpoised and the first heat exchange fluid is mixed through one inner pin and the other inner pin. If crossed section of the main tube is formed in circle, the ratio of the inside diameter to the distance between the depression part and the center of the main tube is 1:2.5-1:5. The cross-sections the protrusion part and the depression part are formed into arc formation. More than 3 protrusion parts of the inner pin are formed.