| 摘要 |
PURPOSE:To provide a gas burner which has a wide controlling range for heating power, by adding feed air to the high combustion side only by a fan, and by utilizing an ejector effect only on the low combustion side. CONSTITUTION:A feed air chamber 7 has a draft hole A8 where a fan 9 is built-in, and a draft hole B 11 which has an open/close plate 10 opened and closed by the inside pressure of a chamber. Up to a scale 6 on an operation part 12, combustion is taken place by premixed air sucked from a nozzle 6 by the ejector effect of injection pressure of gas in the same manner as conventional gas stoves. When a knob 13 is moved between scales 7-10 as high heating power is needed, a switch 14 closes the circuit for a fan 9 to start feeding of draft, as well as to increase the gas rate. The draft applies pressure to the feed air chamber 7, and the draft hole B 11 is closed by the open/close plate 10, then forced feed air is fed into a mixing pipe 4. A wide combustion range can be obtained for a gas burner by replenishing premixed air, which is insufficient by the air sucked from the nozzle 6 only. |
