FILTER DEVICE

摘要

A filter device includes a fluid outlet at its axis; a fluid inlet in a position away from the axis; a filter portion in which a fluid containing particles is supplied at a predetermined flow speed from the fluid inlet to cause a swirl, particles are moved outward in a centrifugal state and the fluid from which the particles are separated is discharged from the fluid outlet, and the particles separated by slowing the swirl are allowed to sink; and a settlement portion in which the particles that settle in the filter portion are allowed to settle. Thus, a fluid containing particles is supplied at a predetermined flow speed to cause a swirl, the particles are separated by centrifugal force caused by the swirl and allowed to sink and settle, and the fluid from which the particles are separated is discharged. A large amount of particles can reliably be allowed to settle and removed in a short time with this small-sized, simple device. The filter device does not clog, does not need wash and exchange work and keeps the costs low.