| 摘要 |
PURPOSE:To improve the heat transfer rate and draining property of the heat exchanger by a structure wherein rugged strips are formed on a fin between each of heat pipes toward the direction of the steps of the heat pipes and erected pieces open with the same inclination and direction are also formed on both sides of the fin employed in the finned tube type heat exchanger used for an air conditioner and the like. CONSTITUTION:The rugged beads 4 are provided between the heat pipes 2 piercing the flat plate fins 1a toward the direction normal to the direction of air flow as indicated with the white arrow. A plurality of the erected slits 5-8 are provided on both sides of the rugged beads 4. The erected slits 5 and 6 are formed by being erected on both sides of the fin 1a so as to have the fixed inclination and direction and the erected slits 7 and 8 are formed by being erected alternately on either of both sides of the flat plate fin 1 so as to have the same inclination and direction as those of the erected slits 5 and 6 toward the surface of the flat plate fin 1. Owing to the structure as described above, the temperature boundary layers on the rugged beads 4 and the erected slits 5- 8 become thin and stimulate the disturbance in the flow passing over the beads 4 and the slits 5-8, resulting in improving the heat transmitting property. Furthermore, when the titled heat exchanger is used as an evaporator, the draining property of condensate is improved due to the capillarity of the rugged beads 4. |
