| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a hybrid type electric water heating apparatus capable of corresponding to highly efficient utilization of a solar heat and additional heating and having excellent facility. SOLUTION: Hot water in a tank 11 is heated by upper and lower heaters 12 and 13 of a heating tank 111 at the upper part of the tank 11 and a heat exchanger 14 located at a hot water storage tank 112 at the lower part of the tank 11 and radiating a solar heat in the shot water storage tank 112 and the hot water is stored. In a so formed hybrid type electric water heating apparatus, a heat collector 21 and line 23 through which an antifreezing solution 201 is forcibly circulated, are connected to the heat exchanger 14. Temperature sensors 15, 16, and 17 are situated at intervals at the upper part of the tank 11. A temperature sensor 18 to detect a boiling temperature is situated at the central part of the tank 11. Through energization of the upper and lower heaters 12 and 13 and collection of a solar heat, hot water in the tank 11 is boiled.</p> |
