Heat exchanger tube
AssigneeKM Europa Metal AG
InventorUlrich Naumann
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Abstract
The exchanger tube has a smooth outside surface and a structured inside surface. The inside surface is formed from parallel primary and secondary ribs that run at an angle with respect to the longitudinal tube axis and respectively comprise inclined, planar flanks, channels that are limited laterally by the primary and secondary ribs and troughs shaped into the primary and secondary ribs. The radial extension of the secondary ribs is less than that of the primary ribs. The troughs are triangular. The center longitudinal planes of the troughs are disposed at an angle with respect to the longitudinal tube axis. The summits of the primary and secondary ribs are rounded. Rounded chamfers are provided between the flanks of the primary and secondary ribs and the channel beds.
Claims27
An exchanger tube for a heat exchanger having a longitudinal axis, an exterior surface, and an interior surface comprising:
- rows of primary ribs running at an angle (α) with respect to the longitudinal tube axis, the primary ribs having a radial height H1 and inclined flanks;
- rows of secondary ribs running at an angle with respect to the longitudinal tube axis, the secondary ribs having a radial height H2 and inclined flanks;
- channels that are delimited laterally by the primary and secondary ribs;
- and
- troughs that extend transversely through the primary and secondary ribs, said troughs including inclined flanks, wherein the troughs extend at an angle (γ) with respect to the longitudinal tube axis;
- wherein H1 is greater than H2.
Dependencies are inferred from the claim text.