| 摘要 |
In a liquid heating apparatus an external drum (3) comprising a dual wall is provided in a water tank (1), the external drum has a combustion gas distribution chamber (5, 11) formed in the dual wall, an internal drum (4) having a combustion chamber (9) is provided therein and a partitioned water chamber (6) is formed therebetweeen, an upper communicating tube (7) penetrating the external drum and communicating to inside of the water tank and a lower communicating tube (8) communicating the lower section of the partitioned water chamber to the base of the water tank are provided in the upper and lower sections of the partitioned water chamber respectively, a draft tube (10) communicating the combustion chamber to the combustion gas distribution chamber is provided in the upper section of the partitioned water chamber, an exhaust tube (12) opened to the outside of the water tank is provided in the lower section of the external drum, and a combustor support cylinder (13) penetrating the external drum and the partitioned water chamber and extending from the side wall of the internal drum to outside of the water tank is provided. <IMAGE> |
