| 摘要 |
<p>PURPOSE: To always keep a set temperature constant with a control box, by a method wherein gas and electric heat sources are provided in a combustion chamber arranged in a heating water tank provided inside a body, and a water pipe or a fuel pipe is arranged protruding from the combustion chamber to control the temperature of hot water in the heating water tank as specified. CONSTITUTION: After a heating water tank 2 is filled with water by a refilling water pipe 11, a graduation of a set temperature gauge 14 is adjusted to a desired temperature position. When a power source switch 18 of a control box 7 is operated, water is heated. At this point, the condition of ignition is checked by a flame detector 19 and a heat source is continuously supplied through a gas pipe 20 and a burner. Hot water temperature sensors 5 and 5' sense the temperature of the heating water tank 2 through wires 6 and 6' of the hot water temperature sensors to be transmitted to the control box 7. As the temperature of the hot water lowers by about 10-15 deg.C from the temperature on a set temperature gauge 14, the control box 7 is operated to supply a heat source, thereby always keeping the set temperature constant.</p> |
