FIELD: heating equipment.
SUBSTANCE: invention can be used in heat exchangers. In finned heat exchange pipe on each rib pressing or stamping is made with multiple arrow-shaped elements, at that arrow-shaped element is formed by two intersecting wedge-like sections. Pressed arrow-shaped elements are grouped into pairs of elements arranged in each other, one of the arrow-shaped elements from the pair is made by positive pressing relative to the plane of the rib, and other of shaped elements from pair is made by negative pressing relative to plane of rib. Pairs of arrow-shaped elements are arranged in rows parallel to air flow direction, note here that pairs of arrow-shaped elements of one row are arranged in staggered order relative to pairs of arrow-shaped elements in adjacent row along rib in direction of air flow.
EFFECT: technical result is increased rib rigidity and heat transfer intensity.
8 cl, 11 dwg
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