| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hot water tank which has its trunk portion molded of a metallic material and its cover potion molded of a resin material, deforms the cover portion by tank internal pressure in a manner increasing contact pressure between the two portions, to thereby solve a problem of leakage from the tank. <P>SOLUTION: The hot water tank is constructed such that the trunk portion 17 and the cover portion 18 covering an opening 17A of the same are connected together so as not to be separated from each other, and that equipment mounting holes 22A to 22C are formed in the cover portion 18. According to the hot water tank thus constructed, while the cover portion 18 is formed of the resin material, the trunk portion 17 is formed of the metallic material such as stainless steel, for instance, which is less deformable under stress than the material of the cover portion 18. Then, a sealing material 29 is arranged at a joint portion between the cover portion 18 and the trunk portion 17, and the cover portion 18 is deformed in a direction that increases pressure onto the trunk portion 17, by hydraulic pressure in the tank. <P>COPYRIGHT: (C)2004,JPO |
