| 摘要 |
PURPOSE:To reduce pressure loss, by equipping a feed and exhaust cylinder with an O ring. CONSTITUTION:The primary feed and exhaust cylinder body 8 is formed of a plurality of feed holes A on the surface of wall of a top part, an external cylinder 8a on which exhaust holes A' are formed, and an internal cylinder 8b. The secondary feed and exhaust cylinder body 9 is composed of an external clyinder 9b and an internal cylinder 9a. Both of said internal cylinders 8b and 9a, and external cylinders 8a and 9b are engaged to each other as shown in the Fig., and the bodies 8 and 9 are connected to each other. At this time, an annular groove 8a', protruding to the outside of a peripheral edge, is provided to the external cylinder 8a confronting the annular groove 8b' serving as a stopper of an external cylinder 9b, as well as an annular groove 8b' is provided to the internal cylinder 8b, in order to equip an O ring 12 thereto, for the purpose of preventing exhaust gas mixing into the air for combustion. With such an arrangement, decrease of open area is prevented by an annular groove 8b', and as a result, the problem such as the interrupted combustion can be eliminated. |
