EVAPORATOR TUBE HAVING AN OPTIMISED EXTERNAL STRUCTURE

摘要

The invention relates to a metal heat exchanger tube for the evaporation of liquids on the outside of the tube, comprising a tube axis, a tube wall, and integrally formed ribs that run circumferentially on the outside of the tube. The ribs have a rib foot, rib flanks, and a rib tip, wherein the rib foot projects substantially radially from the tube wall. A respective groove is located between every two ribs that are adjacent to one another in the axial direction. At least first, second, and third lateral material projections, which are formed from the material of the ribs, are arranged on a first, second, and third level on the rib flanks in such a way that the grooves are largely covered by all of the material projections. According to the invention, the first, second, and third lateral material projections are formed on levels that are in each case differently spaced apart from the tube wall in the radial direction.

主权项

1. A metal heat exchanger tube (1) for the evaporation of liquids on the outside (21) of the tube, comprising a tube axis, a tube wall (2), and integrally formed ribs (3) that run circumferentially on the outside (21) of the tube and have a rib foot (31), rib flanks (32), and a rib tip (33), wherein the rib foot (31) projects substantially radially from the tube wall (2), there is a respective groove (35) between every two ribs (3) that are adjacent to one another in the axial direction, and wherein lateral material projections formed from material of the ribs (3) are arranged on the rib flanks (32), characterized in that at least first (41), second (42), and third (43) lateral material projections are arranged in such a way that the grooves (35) are largely covered by the material projections (41, 42, 43) taken as a whole, and that the first (41), second (42) and third (43) lateral material projections are formed on levels that are in each case differently spaced apart from the tube wall (2) in the radial direction.