| 摘要 |
PURPOSE:To improve ignition failure between burner ports when distance between burner ports are widened, by intermitting the distance of burner ports into several parts, and by providing flame holding grooves for ignition to burner ports at both ends of the intermitted parts. CONSTITUTION:Part of mixed gas injected from burner ports is spread in the distance direction 54 of burner ports 51 by flame holding grooves 53 for flames ignition provided in the distance direction of burner ports 51. The mixed air led by the flame holding groove 53 for ignition from the burner ports 51 at both ends is joined in an intermittent part 55, forming an actual burner port to become the continuous state with each other. The degree of continuity of the burner ports 51 in the intermittent part 55 is changed by the rate of mixed gas in the flame holding groove 53 for ignition. Formation of small flames which can be held in the intermittent part 55 is enough, and the secondary air can be fed enough to the burner ports without being disturbed by flames. |
