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1. 发明授权

US6026892A Heat transfer tube with cross-grooved inner surface and manufacturing method thereof 失效
标题翻译：具有交叉槽内表面的传热管及其制造方法
公开(公告)号：US6026892A
公开(公告)日：2000-02-22
申请号：US927542
申请日：1997-09-11
申请人： Pyung Gon Kim , Kill Soon Kwak
发明人： Pyung Gon Kim , Kill Soon Kwak
IPC分类号： B21B1/22 , B21C37/083 , B21C37/15 , B21D53/06 , F28F1/40
CPC分类号： F28F1/40 , B21C37/083
摘要： A heat transfer tube with a cross-grooved inner surface used in refrigerators, air conditioners or the like and a manufacturing method thereof are disclosed. The heat transfer tube is formed in such a manner that the helix angle .alpha. of a primary spiral groove to the longitudinal axis of the tube is in the range of 10.degree. to 40.degree., the intersecting angle .beta. of a secondary groove to the primary spiral groove is in the range of 75.degree. to 105.degree., the ratio H/Hf of a height H of the secondary groove to a height Hf of the primary spiral groove is in the range of 0.5 to 1.0, the slope angle .gamma..sub.1 of an upstream slant face is in the range of 90.degree. to 105.degree. to the direction of the primary spiral groove, the slope angle .gamma..sub.2 of a downstream slant face is in the range of 30.degree. to 60.degree. to the direction of the primary spiral groove, and the ratio A/B of a width A of an upper surface of the ridge formed between the primary and secondary grooves to a width B of an upper opening portion of the secondary groove is in the range of 0.2 to 1.0.
摘要翻译：公开了一种具有用于冰箱，空调等的交叉槽内表面的传热管及其制造方法。传热管以这样的方式形成，使得主螺旋槽与管的纵向轴线的螺旋角α在10°至40°的范围内，次级槽与主螺旋的相交角β 凹槽在75°至105°的范围内，次级槽的高度H与主螺旋槽的高度Hf之比H / Hf在0.5至1.0的范围内，斜率角γ 上游倾斜面与主螺旋槽方向相比在90°至105°的范围内，下游倾斜面的倾斜角γ2与主螺旋槽方向相差30°至60° 并且形成在第一和第二槽之间的脊的上表面的宽度A与第二槽的上部开口部的宽度B的比A / B在0.2至1.0的范围内。

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