Heat exchanger tube

Details Heat exchanger tube Heat exchanger tube

2006-09-06

2009-11-10

Tyler, Cheryl J (Department: 3744)

Heat exchange

Tubular structure

C165S183000

Reexamination Certificate

active

07614443

ABSTRACT:
A heat exchanger tube has an inner peripheral surface serving as an exhaust gas flow path with a flat cross-sectional shape. A thin structure is incorporated in the heat exchanger tube and has a substantially rectangular channel-shaped waveform in cross section. The corrugated fin structure has a curved surface forming waveform meandering with a predetermined wavelength in the lengthwise direction. The wave width of the channel-shaped waveform is H, the wavelength of the waveform meandering in the lengthwise direction is L and the amplitude of the waveform meandering in the lengthwise direction is A. The heat exchanger tube is formed so that H/L is set at 0.17 to 0.20 and the ration (G/H) of a gap G determined by H−A to H is set at −0.21 to 0.19.

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