Heat exchange – With coated – roughened or polished surface
Patent
1996-03-05
1999-11-02
Leo, Leonard
Heat exchange
With coated, roughened or polished surface
165184, F28F 140
Patent
active
059751967
ABSTRACT:
A heat transfer tube having an internal surface that enhances the heat transfer performance of and also improves the workability of the tube and a method of manufacturing such a tube. The internal surface has a plurality of ribs that extend at an angle to the longitudinal axis of the tube. A pattern of parallel notches, extending at an angle to the ribs, extend through the ribs and into the main inner surface of the tube wall. The tube can be made by rolling embossing the pattern of ribs and notches on to one side of a flat metal strip, then roll forming the strip into a tubular shape with the embossed pattern on the interior of the tubular shape and the edges of the strip forming a longitudinal seam, then joining, preferably by welding, the edges along the longitudinal seam to form a tube. In a preferred embodiment, the notches in the inner surface extend into the weld zone of the tube. The pattern of ribs and notches increase the total internal surface area of the tube and also promote conditions for the flow of refrigerant within the tube that increase heat transfer performance. The notches also serve to inhibit the propagation of splits in the tube wall when the tube is flared.
REFERENCES:
patent: 3885622 (1975-05-01), McLain
patent: 4480684 (1984-11-01), Onishi et al.
patent: 4658892 (1987-04-01), Shinohara et al.
patent: 4733698 (1988-03-01), Sato
patent: 5332034 (1994-07-01), Chiang et al.
patent: 5351397 (1994-10-01), Angeli
Bennett Donald Leman
Gaffaney Daniel Paul
Heiskanen Hannu Tapani
Riggs Gerald Lee
Rottmann Edward Goeb
Carrier Corporation
Habelt William W.
Leo Leonard
LandOfFree
Heat transfer tube does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Heat transfer tube, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Heat transfer tube will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2123172