Patent ID: 8091616
Filing Date: 2012-01-10
Classification: B21C,B23D,F28F,Y10T

Abstract:
1. A heat transfer tube, comprising a tube body, and outer fins integrated with the tube body which are formed by allowing the material on the said tube body to extend along a radial direction of the tube body and wind and extend around the tube outside surface in helical manner, wherein an upper part of the outer fin is provided with notches, a tooth platform is formed between two adjacent notches, the depth of the notch is smaller than the height of the outer fin, the notch and the tooth platform constitute the outer fin in a sawtooth shape, and a plurality of microscale channels having a channel width of 0.001-0.5 mm and a depth of 0.001-0.2 mm are formed on at least one lateral surface of the outer fin, and additionally comprising at least one arc microscale channel extending from the root of the tooth platform to the provided at least one tooth platform lateral surface of a pair of tooth platform lateral surfaces of corresponding two sides of the tooth platform facing the notch, and the arc microscale channel has a width of 0.001-0.5 mm and a depth of 0.01-0.2 mm.