Grooved tubes for heat exchangers in air conditioning equipment and refrigerating equipment, and corresponding exchangers
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United States of America Patent
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Dec 2, 1997
Grant Date -
N/A
app pub date -
Jan 5, 1996
filing date -
Jun 7, 1993
priority date (Note) -
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status (Latency Note)
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Abstract
Tube (1) internally grooved by helicoidal ribs (2) having a helix angle of 5.degree. to 50.degree., an apex angle (alpha) of 30.degree. to 60.degree.. The tube is characterized in that the ribs (2) form a periodic profile comprising at least two ribs of different heights, one designated high (2h) of a height Hh, and the other designated low (2b) of a height Hb, with a ratio Hb/Hh of 0.40 to 0.97, each high rib being bordered by a flat-bottomed groove (3).
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