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AssigneeJiangsu Cuilong Precision Copper Tube Corporation
InventorsMinghua Lu, Chunming Zhang, Xing Luo, Haoping Zhou
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A heat transfer tube can comprise a tube body, and outer fins integrated with the tube body which are formed by allowing material on the tube body to extend along radial direction of the tube body and wind and extend around the tube outer surface in helical manner, wherein microscale channels are formed on at least one lateral surface of the outer fin. The invention has the advantage that the microscale channel is formed on at least one lateral surface of the outer fin to help increase the heat exchange area of the outer fin surface, improve the fluid disturbance, enhance the forced convention heat exchange out of tube, and significantly improve the heat transfer coefficient; when the enhanced heat transfer tube in the present invention is applied on an evaporator, the microscale channel can greatly increase the number of the nucleation sites, so as to enhance boiling heat exchange in condition of low heat flux density; when the enhanced heat transfer tube in the present invention is applied on a condenser, the microscale channel can improve distribution of liquid membrane thickness on outer fin surface to enhance condensing heat exchange.
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.
Dependencies are inferred from the claim text.