| 摘要 |
PURPOSE:To contrive the reducing of manufacture cost, and the obtaining of high efficiency of the titled device by a method wherein fins provided on each burning gas side and air side of a heat exchanger are arranged in parallel for the gas forward direction, and the air to be heated is supplied from the right angled direction for the gas forward direction. CONSTITUTION:Plural fins 7, 9 are provided on the burning gas side and the air side of a heat exchanger 6, those fins 7, 9 are arranged in parallel for the burning gas forward direction, the air to be heated is supplied from the right angled direction for the gas forward direction by a convection blower 16. Because of the direction of fins 7, 9 are formed in the same direction, the manufacturing process can be decreased and manufacturing cost can be saved. Further, the excellent convection heat transferring can be obtained by the supplying of the air to be heated from the right angled direction for the burning gas forward direction. |
