| 摘要 |
Disclosed herein is a solenoid valve (200) having a valve seat assembly (30) manufactured as a single body such that the valve seat assembly (30) is simply fitted in a valve housing (21). The valve seat assembly (30) comprises a valve seat (31), a filter (32), and preferably a sealing plate (33). The valve seat assembly (30) is disposed at one end of a housing (21). The valve seat (31) comprises a first orifice (31a) formed such that the first orifice is opened and closed as a plunger (24) is moved forward and backward, and preferably a second orifice (31b) formed such that the second orifice (31b) is arranged in parallel with the first orifice (31a). The preferred sealing plate (33) is provided at the center thereof with a through-hole (33a), which communicates with the first orifice (31a) of the valve seat (31). The sealing plate (33) is disposed in the valve seat (31) such that the sealing plate (33) is not separated from the valve seat (31) by means of the filter (32). The sealing plate (33) is moved toward the first orifice (31a) by the pressure of a fluid close the second orifice (31b). In this way, the sealing plate (33) serves as a check valve.
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