| 摘要 |
PURPOSE:To permit the restriction of the ventilating resistance of airflow as well as the improvement of heat exchanging capacity by a method wherein the title heat exchanger is constituted of flat plate fins, provided with a plurality of stages of flat grooves, notched at both ends of the rims, and hollow flat tubes, inserted into the flat grooves from the side surface thereof and enclosed by long sides and short sides, while the thickness of the flat tube in the direction of the short sides thereof and a pitch in the direction of the steps are specified. CONSTITUTION:Flat tubes 10, inserted into and adhered to the flat grooves 8 of flat plate fins 7 from the side surfaces thereof, are constituted of long sides 10a, short sides 10b and partitioning plates 10c, dividing the inside of the pipes, while a plurality of the flat tubes are arranged with a pitch Pd so that the long sides 10a of the flat tubes 10 are arranged in parallel to the direction of airflow A. The thickness (t) in the direction of the short sides 10b of the flat tube 10 is specified within 1-3mm while the pitch Pd is specified within 8-12mm. According to this method, the density of the flat tube 10 and the flat plate fin 7 may be increased and the remarkable increase of heat exchanging capacity as well as the peak point thereof may be obtained while the increase of the ventilating resistance of airflow, which is generated by the increase of the density of the flat tube 10 and the flat plate fin 7, may be restrained by the employment of thin type flat tubes 10. |
