PARTICLE SEPARATION DEVICE AND PARTICLE MEASURING DEVICE PROVIDED WITH SAME

摘要

The purpose of the present invention is to prevent coarse particles flowing in the main flow path from reversing flow to a branch flow path side even when the size of a particle separation device is reduced. A main flow path (5b) has a flow path extension part (5d) in at least one part of a flow path from an inlet on a branched part (A) side to a terminal outlet (B). In the flow path extension part (5d), an air flow passing surface area (S) wherein an airflow passes expands gradually going from the branched part (A) side to the terminal outlet (B) side.