Global Patent Index - EP 0733871 B1

EP 0733871 B1 2000-02-02 - Heat transfer tube for a heat exchanger

Title (en)

Heat transfer tube for a heat exchanger

Title (de)

Austauscherrohr für einen Wärmeaustauscher

Title (fr)

Tube pour échangeur de chaleur

Publication

EP 0733871 B1 (DE)

Application

EP 96103390 A

Priority

DE 19510124 A

Abstract (en)

[origin: EP0733871A1] The pipe (1) has a smooth outer surface (2) and a structured inner surface (3) having parallel ribs (7) running at an angle ( alpha ) of 90 degrees to the longitudinal axis (6) of the exchange pipe. The ribs have sloping flanges (8) and form channels (13) and cross running troughs (14). The middle longitudinal plane of the troughs runs at 90 degrees to the longitudinal axis of the exchange pipe. The troughs have a sine curve formed shape in their longitudinal cross-section and are formed with a micro roughness (16) upper surface (8,10,11) and have rounded ribbed (7) heads. The oppositely lying, neighbouring ribs of the flanges are connected to the channel soles (12) by rounded transitions (11).

IPC 1-7 (main, further and additional classification)

F28F 1/40

IPC 8 full level (invention and additional information)

F28F 1/40 (2006.01)

CPC (invention and additional information)

F28F 1/40 (2013.01); Y10S 165/515 (2013.01)

Designated contracting state (EPC)

AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

EP 0733871 A1 19960925; EP 0733871 B1 20000202; AT 189518 T 20000215; DE 19510124 A1 19960926; DK 0733871 T3 20000724; ES 2143102 T3 20000501; GR 3033193 T3 20000831; JP H08327273 A 19961213; PT 733871 E 20000630; US 5682946 A 19971104

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