Flat porous surface condenser tube for vehicle cooler exchanger - contains discrete coolant whose width is between 1.8 and 6 times distance between beds of grooves among closely spaced projections on opposite walls

摘要

A flat condenser tube (1) comprises a plurality of discrete refrigerant paths (10, 11) arranged in parallel in the width direction and extending in the length direction of the tube. The external height (h) of the tube (1) is set to be not more than 2 mm, The internal height (h1) of each path (10, 11) is not more than 1.2 mm. The ratio of the width (w1) to the internal height (h1) is within the range of 1.8 to 6.0. A plurality of projections (12, 12a, 12b, 12c) continuously extending in the length direction are provided in each refrigerant path (10, 11). Grooves (13) adjacent the projections have smooth bottoms and the ratio of the height (h2) of the projections (12; 12a. 12b, 12c) to the internal height (h1) is within the range of 0.055 to 0.25. The pitch (p) of the projections preferably ranges from 0.25 to 0.6 mm. Various projection forms are disclosed. IMAGE