| 摘要 |
PURPOSE:To provide a heat exchanger which is compact in size, simple in construction, high in thermal efficiency and withstandable against burning without water by disposing a cylindrical honey-comb structure made of ceramics in a combustion gas passage, fitting a liquid tube in the inside of said passage and disposing a burner adjacent to one end side of the honey-comb structure. CONSTITUTION:A heat exchanger 6 is provided with an outer cylinder 12 whose bottom part 12a is closed and whose upper end part is turned down to constitute an exhaust cylinder 7. A burner 14 is disposed at the bottom part 12a to which an outer side liquid tube 18 penetrating through the center thereof is coupled. The lower end part of an inner side liquid tube 17 is coupled to the end wall of a joint 19 connected to the lower end of the outer cylinder 12. A honey-comb structure 10 made of ceramics as a heat exchange part is disposed between the outer cylinder 12 and the outer side liquid tube 18 at the immediately upper side of the burner 14. A liquid introduced from a liquid supply port 17a passes through a passage 3 of the inner side liquid tube 17 and flows upwardly, and returns back at the part of a cap 8. Then, the liquid flows down in the inner part of the honey-comb structure 10 of the outer side liquid tube 18, heated and supplied from a feed outlet port 15.
|
