发明名称 |
METALLIC HEAT EXCHANGER TUBE |
摘要 |
<p>The pipe i.e. integrally rolled ribbed type pipe (1), has ribs (2) running helically on a pipe exterior. Primary grooves (6) are found between the adjacent ribs. An undercut secondary groove (8) is arranged in an area of a groove base (7) of the primary grooves. A pair of oppositely lying material edges (9) extends continuously along the primary grooves. A cross section of the secondary groove is varied in space intervals without influencing a shape of the ribs. A distance is formed between the edges such that the distance is varied in spaced intervals to form local cavities (10).</p> |
申请公布号 |
PT2101136(E) |
申请公布日期 |
2015.04.22 |
申请号 |
PT20090002560T |
申请日期 |
2009.02.24 |
申请人 |
WIELAND-WERKE AG |
发明人 |
ANDREAS BEUTLER;JEAN EL HAJAL;ANDREAS KNÖPFLER;ANDREAS SCHWITALLA |
分类号 |
F28F1/40;F28F1/36;F28F13/18 |
主分类号 |
F28F1/40 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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