DEVICE TO SAMPLE AND CONCENTRATE SAMPLES OF AEROSOLS Russian patent published in 1999 - IPC

FIELD: instrumentation. SUBSTANCE: invention is related to devices meant to take samples of aerosols with low concentrations out of air and can be used to study composition aerosols jointly with any aerosol analyzer. Proposed device makes it feasible to measure threshold dimension of separation of particles under constant rate of aerosol flow through device, to raise quality of separation of particles thanks to reduced loss of particles on internal surfaces of device and to increased acuity of separation. Device includes cylindrical body with branch pipe for air suction, inlet conduit presenting accelerating nozzle formed by disc installed uniaxially in front of body with clearance relative to end face that is made in the form of truncated cone narrowing towards disc. Intake tube with branch pipe to release aerosol is placed in body uniaxially to disc. Butt of intake tube is located at bigger distance than end face of body. Disc is kinematically coupled to body with the use of mechanism of its axial movement. Device is fitted with unit forming gas flow which outlet branch pipe is connected uniaxially to disc that has axial hole. EFFECT: enhanced functional reliability of device. 3 cl, 4 dwg