INLET PART OF SYSTEM FOR MEASURING FLOATING FINE DUST IN AIR

摘要

PURPOSE: An inlet part of a system for measuring floating fine dust in the air is provided to precisely measure an amount of fine dust of 2.5micrometer or less by sorting dust having relatively larger mesh sizes according to the difference of inertia. CONSTITUTION: An inlet part of a system for measuring floating fine dust in the air includes an upper cap(10) formed with a downward air inlet(11) at one part of a periphery and coupled with a cylindrical mosquito net(12) in a central part, an upper inlet part(20) formed with a hopper type collecting space part(21) and an acceleration nozzle(22) in the center, and a lower inlet part(30) formed with a sorting space part(31) at an upper part and a smaller particle suction hole(35) at a lower part and suspended with a larger particle collecting trap(33) below the sorting space part, wherein the diameter of the acceleration nozzle is 3.2mm, a distance between the acceleration nozzle and the larger particle collecting trap is 3.6mm, and the diameter of the larger particle collecting trap is 8.55mm with an allowable error of plus and minus 0.5mm.