Multi-bored flat tube for use in a heat exchanger and heat excha

Details Multi-bored flat tube for use in a heat exchanger and heat excha Multi-bored flat tube for use in a heat exchanger and heat excha

1998-05-29

1999-12-14

Flanigan, Allen

Heat exchange

With protector or protective agent

165110, 165177, F28F 102

Patent

active

060004673

ABSTRACT:
A multi-bored flat tube has outermost unit passages located at both ends of the tube and intermediate unit passages between the outermost unit passages. The outermost unit passage has a circular-based inner surface in cross-section, such as a circumferentially smooth curved shape in cross-section like a perfect circular shape or elliptical shape, or has a circular-based inner surface in cross-section having a plurality of inner fins extending in a longitudinal direction of the tube. The intermediate unit passage has a non-circular based cross-sectional shape, such as rectangular, triangular, trapezoidal, or circular based shape including a plurality of inner fins. The tube is strong against being hit by a stone and has a high heat exchanging performance.

REFERENCES:
patent: 5251692 (1993-10-01), Haussmann

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