Condenser tubes with additional flank structure

Patent metadata

Field	Value
Publication number	US-10974309-B2
Application number	US-201816151828-A
Country	US
Kind code	B2
Filing date	Oct 4, 2018
Priority date	Dec 16, 2011
Publication date	Apr 13, 2021
Grant date	Apr 13, 2021

Abstract

A heat exchanger tube with a tube axis, a tube wall and with ribs extending around on the tube outer side. The ribs have a rib foot, rib flanks and a rib tip, wherein the rib foot projects substantially radially from the tube wall. The rib flanks are provided with additional structural elements which are arranged laterally on the rib flank. First material projections, which extend substantially in the axial and radial direction, adjoin second material projections which extend substantially in the axial and circumferential direction of the tube, wherein the first and second material projections have a common boundary line. The axial extent of the first material projections along this boundary line is less than the axial extent of the second material projections.

First claim

What is claimed is:

1. A metal heat exchanger tube comprising a tube wall and fins on the tube outer side which have a fin root, fin flanks and a fin tip, wherein the fin root projects essentially radially from the tube wall, and the fin flanks are provided with additional structural elements which are arranged laterally on the fin flanks, wherein first material projections, which extend both in an axial direction and a radial direction wider than in a circumferential direction, and second material projections, which extend both in the axial direction and the circumferential direction wider than in the radial direction of the tube, are formed, and wherein the first material projections are arranged at a distance from the second material projections.

2. The metal heat exchanger tube as claimed in claim 1 , wherein the first material projections extend from the fin tip in the radial direction and a radial extent of the first material projections is smaller than a radial distance of the second material projections from the fin tip.

Assignees

• Wieland Werke Ag

Inventors

• Gotterbarm Achim
• El Hajal Jean
• Beutler Andreas

Classifications

• B21J5/068 Primary

  Shaving, skiving or scarifying for forming lifted portions, e.g. slices or barbs, on the surface of the material · CPC title

• F28F21/08

  of metal · CPC title

• F28F1/12

  the means being only outside the tubular element · CPC title

• F28F1/34

  and extending obliquely (F28F1/38 takes precedence) · CPC title

• F28F1/24

  and extending transversely (F28F1/38 takes precedence) · CPC title