| 摘要 |
PURPOSE:To protect the inner wall of a hot-water tank against corrosion, by connecting a conduit having a vane pump and a bubble separating means to the hot- water tank incorporating therein a heater. CONSTITUTION:Tank 1 incorporating therein heater 3 is formed with water outlet port 14 and inlet port 15. A conduit 16 having a vane pump 17 and a bubble separating means 18 consisting of a large-diametered hollow section, an air cushion chamber and an air releasing means is connected to the tank 1 so as to form film on the inner wall surface of tank 1 by transmitting wave motion to the tank 1 and to thereby protect the inner wall of tank 1 against corrosion. At the inlet port 15, there is provided a water distributing plate 29. Further, a preheating pipe 13 is connected to water supply port 10 of water supply pipe 12 which is connected to water reservoir tank 11. The preheating pipe 13 is of a spiral form and it is opened toward the lower portion of heater 3. |
