| 摘要 |
<p>A filtration device (10) has a filtration container into which dirty liquid is introduced, a magnetic spherical filtration material (33) using a large number of metal spheres (35), a magnet (45), and a vertically movable rod (50). The magnetic spherical filtration material (33) is an aggregate of the large number of the metal spheres (35) of a magnetic material and is received in a filtration material reception section (32) such that each metal sphere (35) is movable. The magnet (45) is movable relative to the magnetic spherical filtration material (33) between a first position and a second position. At the first position, a magnetic field is applied to the metal spheres (35) to cause the spheres to be magnetically attracted to each other, which fixes the metal spheres (35) to each other. At the second position, the magnetic attraction between the metal spheres (35) is cancelled to allow the metal spheres (35) to move. The magnet (45) is moved to the first position and second position by the vertically movable rod (50).</p> |
