Basic principle:

Using an aerosol generator to generate a certain concentration of gas, and then measuring the gas concentration with a photometer for particle size detection before and after respiration

Technical indicators:

Test medium NaCl or oil

Air flow rate 10-100L/min

Aerosol particle size 0.075 ± 0.02um

Airflow passing through an area of 100 cm2

NaCl concentration 200mg/m3

Flow accuracy 10-100L/min, accuracy 2%

Experimental medium NaCl

Pressure 500pa

Sample quantity: 1 route

Particle generator, flow detection device, concentration detection device

Filter efficiency detection

Structural configuration:

Aerosol generator station 1 generates a certain concentration of NaCl gas and oily particles

Neutralizer station 1 neutralizes ions

Flow meter 1 for testing gas flow rate

One laser particle counter is used to detect the concentration of NaCl and oil media

Salinity Neutrality 1 Neutrality of Salinity

1 spray painted chassis

Software 1 self-produced

Humidity meter 1 displays humidity

Two pressure gauges display pressure

Temperature gauge 1 collects temperature

Differential pressure sensor 1 collects pressure

Head mold 1 made of silicone material