| 摘要 |
PURPOSE:To facilitate the attachment of a heat exchanging pipe and to improve the heat exchanging efficiency by providing the heat exchanging pipe in the burning chamber separately and independently from a jacket type heat exchanger. CONSTITUTION:A heat exchanging pipe 2 is spirally wound and contained in the burning chamber 1, and its ends 2a, 2b are led out of refractory material 3 at the bottom of the burning chamber 1 to be connected with a circulation pipe 6 which is connected to a bathtub 5 to a form a forced circulation type bath boiler when a circulation pump 7 is incorporated. The heat exchanging pipe 2 is fitted in a groove which is spirally formed in the circumferential direction on the inner surface of the burning chamber 1 so as to tightly contact the inner surface of the burning chamber 1 so that the rate of heat transmission with a heat exchanger 9 on the outer surface may be maximized. The burner 10 is attached at an angle relative to the radial direction of the burning chamber 1 in order to blow the flame in the circumferential direction of the burning chamber 1. Because of this, the flame is caused to turn in the burning chamber 1 to maximize the heat transmission to the heat exchanger 9 and heat exchanging pipe 2. |
