| 摘要 |
<p>A three-way valve includes a cylindrical auxiliary valve shaft (12); a main valve shaft (11) provided within the cylindrical shaft; a cylindrical auxiliary valve plug (10) provided on a tip of the auxiliary valve shaft; a main valve plug (9) provided on a tip of the main valve shaft; a valve body (6); a first port (3) formed in the valve body in a direction of traveling of the main valve shaft; a main valve seat (1) formed around the first port for receiving the main valve plug, the main valve seat and the main valve plug constituting a main valve; an annular auxiliary valve seat (2) for receiving the auxiliary valve plug, the auxiliary valve seat and the auxiliary valve plug constituting an auxiliary valve; a common passage (13) formed between a contact area of the main valve plug with the main valve seat and a contact area of the auxiliary valve plug with the auxiliary seat; a second port (4) formed in the valve body for communicating with the first port via the common passage; a passage (14) formed outside the auxiliary valve seat; and a third port (5) formed in the valve body for communicating with the passage and the second port via the auxiliary valve and the common passage.</p> |
