| 摘要 |
PURPOSE:To maintain the quantity of air, which flows in through a slit part, constant by combining a variable orifice with a pipe by means of a spring. CONSTITUTION:A variable orifice 13 is combined with a pipe 11 by means of a spring 18. Thereby, dynamic pressure applied to the variable orifice 13 balances with the force of the spring 18, and the movement of the variable orifice 13 can be automatically adjusted, thereby, enabling the quantity of air, which flows in from the variable orifice 13 to the pipe 11, to be varied, to maintain the quantity of air, which flows in through a slit part 12, constant. |
