Effect of the microenvironment of powered air-purifying medical protective hood on the body s physiological parameters;

In order to study the impact of HEPA outlet on air distribution in non-unidirectional airflow clean room as well as the performance of the HEPA outlet,the performance of the HEPA outlets between different forms was investigated by the method of model test.

In this paper based on operation of bag precipitator,the suitable operation factors is determined,as filtration velocity etc.

Both theorectical and experimental results show that the relation of the pressure drop and the filtration velocity is linear and follows Dacy law.

Points out two problems that are met in the design of dust removing system with bag filter ——incorrectly selecting filtering velocity and the pressure of air sweeping in reverse,analyses the causes of the two problems, and offers some opinions of author to other designers.

The curves of efficiency versus filtering velocity, voltage and dust consistency indicate how these primary parameters influence the .

HEPA supply outlet diffusion perforation panel influences cleanroom air velocity field,cleanliness,cleanliness recovery characteristic and resistance of the diffusion panel.