| 摘要 |
<p>PROBLEM TO BE SOLVED: To realize an inexpensive four-way selector valve switchable with a high pressure difference even in the use of a small solenoid coil. SOLUTION: This four-way selector valve comprises a valve box 22 sealed by fixing a flat main valve seat 29 having a low-pressure conduit 31, a high-pressure conduit 32 and two conduits 33, 34 and to the lower end of a cylinder 28, and fixing a lid 30 having a downward extending pin 35 fixed to one position to the upper end of the cylinder 28; a main valve element 23 provided within the valve box 22 and rotatably supported by the inside surface of the valve box 22, the main valve element having a communicating groove 36 selectively allowing the low-pressure conduit 31 to communicate with one of the two conduits 33 and 34 on the main valve seat 29 side and a communicating hole 38 having a sub-valve seat 39 opened up over the communicating groove 36; a rotor 25 located on the upper part of the main valve element 23 and having a four-pole permanent magnet 27 on the circumference, a sub- valve element 24 to make contact with and separate from the sub-valve element 39 arranged on the inside lower part, and two stoppers to make contact with and separate from the pin 35 of the lid 30 on the inside upper part, and driven by a magnetic circuit 20; and a transmitting means for transmitting the rotation of the rotor 25 to the main valve element 23.</p> |
