| 摘要 |
<p>The heat exchanger hollow cylindrical casing, contains parallel cylindrical tubes along its length, for a first fluid. A spiral guide in the casing, directs a second fluid flow. The spiral guide penetrations (28) accept the tubes. The spiral segments (26) and their penetrations are prepared in a new process, which laser-cuts them from flat material. They are then joined together, to form the spiral guide. The segments have a circular-, elliptical- or oval- inner circumference (30) and/or outer circumference (29). The peforations are circular, elliptical, oval or slotted in form.</p> |
