Process for the production of an evaporator tube

US6067832A · kind A · utility

Assignee

• WIELAND-WERKE AG · DE

Inventors

• Karine Brand · Illerrieden, DE
• Andreas Beutler · Weißenhorn, DE
• Manfred Knab · Blaustein, DE
• Gerhard Schuez · Werl, DE
• Andreas Schwitalla · Illerkirchberg, DE

Key dates

• Filing date: Dec 16, 1998
• Grant date: May 30, 2000
• Expiry date: Dec 16, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/49385
• WIPO field: Thermal processes and apparatus
• WIPO sector: Mechanical engineering

Abstract

A process for producing a heat exchanger tube (1) with a highly porous surface structure, in particular for evaporating liquids from pure substances or mixtures on the outside of the tube. The process starts from a rolling operation, by means of which helical fins (2) are produced on the outside of the tube, which fins, in turn, are deformed in a plurality of compression steps by means of gearwheel-like compression wheels (6, 7) in such a manner that the projections (12a, 12b) formed in each case form a cover (3a) for the passages (3) which are situated between the fins (2). The high level of porosity is achieved as a result of the remaining pores (13) and/or slots (14).