| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a valve capable of preventing the occurrence of impurities due to movement of a valve body. <P>SOLUTION: The valve has: a valve seat 1 having an opening 1a inside a pipe; a valve body 2 having magnetism to open/close the opening 1a; a pair of magnets 3a, 3b which are attached to the outside the pipe with the valve body 2 interposed therebetween and are opposed mutually, in which the N pole of one magnet is opposed to the S pole of the other magnet to form a first magnetic field, and in which the S pole of the one magnet is opposed to the N pole of the other magnet to form a second magnetic field; and a pair of coils 4a, 4b which are opposed mutually with the pair of magnets 3a, 3b interposed therebetween, and which generate a magnetic field in a direction same with the first magnetic field if an electric current passes in a first direction, and generate a magnetic field in a direction same with the second magnetic field if an electric current passes in a second direction. The valve body 2 is moved toward the first magnetic field if an electric current passes through the pair of coils 4a, 4b in the first direction, and is moved toward the second magnetic field if an electric current passes through the pair of coils 4a, 4b in the second direction, thereby opening/closing the opening 1a. <P>COPYRIGHT: (C)2013,JPO&INPIT |
