| 摘要 |
PURPOSE:To keep the temperature of hot water to be supplied always constant, by forming a boundary surface based on the temperature difference of feed water and high-temperature water in a hot-water storing tank. CONSTITUTION:An upper header 1 and a lower header 2 are connected to each other via water pipes 3 arranged in the manner of surrounding a combustion chamber 4, and a hot-water storing tank 8 is formed on the upper header 1. A pipe 9 communicated at its lower end with the upper header 1 is erected in the hot-water storing tank 8, in the manner that its top is opened at an upper portion in the tank 8. A hot-water supply pipe 10 is connected to an upper portion of the tank 8, while a circulating pipe 11 is connected to a lower portion of the tank 8 and the opposite end of the circulating pipe 11 is connected to the lower header 2. Further, a water supply pipe 14 is connected to the circulating pipe 11. |
