DEVICE FOR MEASURING AIR FLOW VOLUME DISCHARGE RATE Russian patent published in 2003 - IPC

FIELD: medical engineering. SUBSTANCE: device has cylindrical air duct, to internal tubes adjacent to each other and having holes for taking air samples and an internal tube to put over them. Two connecting pipes are mounted in perpendicular to the air duct for discharging air via hoses to air flow sensors. Aerodynamic member designed as disk having radial beams and slits is adjacent to the neighboring ends of the internal tubes having two ring-shaped groves on their external surfaces equidistant form disk plane. Through holes are done in each of the grooves. Tube positions relative to each other are fixed. Planes passing over connecting pipe symmetry axes are between grove boundaries equidistant form disk plane. Distance between each plane and grove boundaries is supposed to be greater than internal radius of connecting pipe. When moving along the air duct, airflow is not undergone to actions causing turbulence. EFFECT: high accuracy and reliability of measurements; easy procedure of cleaning air duct parts. 3 cl, 3 dwg _