| 摘要 |
PURPOSE:To improve a heat exchanging performance by a method wherein inner fins are integrally formed with louvers for crossing flow of heat exchanging medium between the adjoining heat exchanging medium passages defined by the inner fins. CONSTITUTION:Although coolant passes within a flat tube 4 along a plurality of coolant passages 7 defined by inner fins 10, the inner fins 10 are formed with several louvers 11, so that the coolant which is apt to flow toward a downstream side of the coolant passages 7 is changed in its flow direction by the louvers 11. The louvers 11 are cut and raised toward the coolant passages 7 adjacent to the upstream side of the air flow. The coolant flowing in the coolant passage 7 at the downstream side of the air flow direction is guided toward the coolant passages 7 adjacent to the upstream side of the air in sequence. The coolant is guided between the adjoining coolant passages 7 toward the high condensing side, so that the coolant may be mixed to each other and then there is no difference in temperature between the coolant passages 7 in a direction of air flow. Due to this fact, no eccentric condensation of air is generated and thus an efficiency of heat exchanging operation is improved. |
