| 摘要 |
The present invention provides a lean rich combustion apparatus capable of supplying rich mixture air and lean mixture air, respectively, by only one nozzle and uniformly supplying air from an impeller. A combustion apparatus for implementing that includes: a first plate and a second plate which are provided so as to face each other; a rich mixture air passage which is provided between the first plate and the second plate and through which rich mixture air flows; a third plate; a lean mixture air passage which is provided between the second plate and the third plate and through which lean mixture air flows; a first burner port member which burns the rich mixture air; and a second burner port member which burns the lean mixture air. Between the first plate and the second plate, there are formed a mixture air inlet through which a part of the air introduced from the impeller and a fuel gas ejected from the nozzle are introduced, a mixture air passage introduction portion and a mixture air passage expansion portion through which the rich mixture air introduced through the mixture air inlet flows, an air inlet through which the remainder of the air introduced from the impeller, and an air passage introduction portion through which the air introduced through the air inlet flows. In the second plate, a plurality of air through-holes is formed so as to eject the air of the air passage introduction portion to the air passage formed between the second plate and the third plate, and a plurality of distribution holes is formed so as to eject a part of the mixture air having passed through the mixture air passage expansion portion to the lean mixture air passage. |
