| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a variable orifice device in which deposited materials are prevented from being stuck around an orifice hole 15, and also to provide a differential pressure type pressure switch device using the same.SOLUTION: When a knob member 17 and an orifice plate 14 are interlocked by a spline mechanism so as to be relatively movable in the axial direction and the knob member 17 is moved against elastic force of an elastic member 20, the orifice plate 14 is adhered to a body part 10 by the elastic force of this elastic member 20. Then, by rotating the orifice plate 14 while keeping an adhered state, a specific orifice hole 15, out of a plurality of orifice holes 15 formed in this orifice plate 14, is made to be associated with a passage hole 11.</p> |
