| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve facility of gas flowing in a flowing port. SOLUTION: The area S surrounded by a base end line 36, a tip line 37, side lines 38 and 39 and connecting lines 401, 402, 411 and 412 is the passing cross-sectional area of a suction port 26. An intermediate line T orthogonal to a reference line X extending in the lengthwise direction of a suction valve by crossing the suction port 26 through a midpoint Ho of the maximum length H of the suction port 26 in the lengthwise direction of the suction valve, divides the suction port 26 into a first division region 261 and a second division region 262. The area S2 of the second division region 262 positioned on the tip side of the suction valve is larger than the area S1 of the first division region 261.</p> |
