The use of such devices in the device and method, and the particle concentration measurements approval air flow to generate an approval airflow

摘要

An apparatus 1 for producing an approval flow Q, the first passage 2 having an end 3 and 4 for the inlet and outlet of the approval flow Q, and disposed within the passage 2 first , the discharge electrode 5 for generating the air monopolar ions 8, wherein is adapted to attract the atmospheric ions 8, whereby a net flow 7 of the atmospheric ions 8 are generated, atmospheric ions 8 By extension in the direction of the net flow and the counter electrode 6 which is adapted to the air flow Q is generated, a sensing element 12 and 13, the output of the sensing elements 12 and 13 is the concentration in the atmosphere charge 8,11 and the sensing elements 12 and 13 is a function, switch the parameters affecting the output of the sensing elements 12 and 13, or a means 17 for modulating, by a means for determining the volumetric flow rate Q on the basis of the time response There are, and means for generating the output of the sensing elements 12 and 13 switching or modulation of the time response, it is an apparatus 1 for producing an approval flow Q. 11. The use of the device 1 according to the claims for determining the concentration of ultrafine particles. Method for producing an approval flow.