| 摘要 |
PURPOSE:To omit energy loss and cumbersome trouble to supply water, by supplying water directly from a water pipe via a pressure-reducing check valve when the amount of water in a circulation passage, in a gas instantaneous heat generating apparatus of gas proportional type. CONSTITUTION:A heat exchanger 1, a circulation onward pipe 3b, a radiation section 2 and a circulation backward pipe 3a constitute a closed circulation passage 3. Said radiation section 2 is used as a heat generating section for a space heater, a bath heater, a dryer, etc. A fuel gas is supplied via an electromagnetic valve 15, a governor 16 and a proportional valve 14 to a burner 4, and water is introduced via a pressure-reducing check valve 5 from a water pipe 6 to the circulation passage 3 so that the passage 3 may be filled with the water. When the amount of water in the circulation passage 3 decreased due to evaporation or the like, the pressure-reducing valve 5 is opened to supply water from the water pipe 6. |
