Inertial filter and particle classification apparatus

摘要

An inertial filter is placed in a fluid flow path and equipped with a particle classifying sheet having a plurality of particle classifying holes uniformly arranged. The particle classifying sheet has a sheet area larger than a fluid passage area at a site where the sheet is placed. A part of the sheet is provided in the form of a partition wall dividing the fluid flow path in two sections in a fluid passage direction to allow for classification of particles.

主权项

1. An inertial filter placed in a fluid flow path for passage of a fluid containing nano-sized particles to collect the nano-sized particles in the fluid flow path by an effect of particle inertia, the inertial filter collecting the nano-sized particles having smaller particle sizes as a velocity of flow of the fluid is increased, the inertial filter including:
a flow quantity adjusting nozzle located on an upstream side of the fluid flow path and having a diametrically-reduced through cavity diametrically smaller in the fluid passage direction, the flow quantity adjusting nozzle adjusting the velocity of fluid flow depending on different forms of the diametrically-reduced through cavity; and a particle classifying sheet located further on a downstream side of the fluid flow path than the flow quantity adjusting nozzle and having a plurality of particle classifying holes uniformly arranged, the plurality of particle classifying holes being formed to collect the nano-sized particles by an effect of particle inertia, the particle classifying sheet having a sheet area larger than a downstream-side opening of the diametrically-reduced through cavity and being provided in the form of a partition wall dividing the fluid flow path in two sections in the fluid passage direction so as to block a whole area of the downstream-side opening, wherein the flow quantity adjusting nozzle is replaceable with another flow quantity adjusting nozzle having a different number of the diametrically-reduced through cavities to allow for adjustment of a quantity of flow of the fluid.