公开(公告)号：US5975196A

公开(公告)日：1999-11-02

申请号：US614789

申请日：1996-03-05

申请人： Daniel Paul Gaffaney ,  Steven Joseph Spencer ,  Donald Leman Bennett ,  Hannu Tapani Heiskanen ,  Gerald Lee Riggs ,  Edward Goeb Rottmann ,  James Marvin Satterly

发明人： Daniel Paul Gaffaney ,  Steven Joseph Spencer ,  Donald Leman Bennett ,  Hannu Tapani Heiskanen ,  Gerald Lee Riggs ,  Edward Goeb Rottmann ,  James Marvin Satterly

IPC分类号： F28F1/40

CPC分类号： F28F1/40

摘要： A heat transfer tube having an internal surface that enhances the heat transfer performance of and also improves the workability of the tube and a method of manufacturing such a tube. The internal surface has a plurality of ribs that extend at an angle to the longitudinal axis of the tube. A pattern of parallel notches, extending at an angle to the ribs, extend through the ribs and into the main inner surface of the tube wall. The tube can be made by rolling embossing the pattern of ribs and notches on to one side of a flat metal strip, then roll forming the strip into a tubular shape with the embossed pattern on the interior of the tubular shape and the edges of the strip forming a longitudinal seam, then joining, preferably by welding, the edges along the longitudinal seam to form a tube. In a preferred embodiment, the notches in the inner surface extend into the weld zone of the tube. The pattern of ribs and notches increase the total internal surface area of the tube and also promote conditions for the flow of refrigerant within the tube that increase heat transfer performance. The notches also serve to inhibit the propagation of splits in the tube wall when the tube is flared.

摘要翻译： 具有提高导热性能的内表面并且也提高管的加工性的传热管以及制造这种管的方法。 内表面具有多个肋，其以与管的纵向轴线成一定角度延伸。 与肋成一定角度延伸的平行凹口的图案延伸穿过肋并进入管壁的主内表面。 管可以通过将肋和凹口的图案压花到平坦金属带的一侧上，然后将带条成形为管状，其中压花图案在管状形状的内部和条带的边缘 形成纵向接缝，然后优选地通过焊接将沿着纵向接缝的边缘接合以形成管。 在优选实施例中，内表面中的凹口延伸到管的焊接区域中。 肋和凹口的图案增加了管的总内表面积，并且还促进了管内制冷剂流动的条件，这增加了传热性能。 凹口也用于当管张开时抑制管壁中分裂的扩散。