Preliminary study of a mask filtration test device with respiratory simulation
10.3760/cma.j.cn121094-20181225-00445
- VernacularTitle:具备呼吸模拟功能的口罩过滤测试装置的初步研究
- Author:
Xiuquan NIE
1
;
Lieyang FAN
;
Qiu CHEN
;
Jingyi QIN
;
Yaoyu LUO
;
Weihong CHEN
Author Information
1. 430030 武汉，华中科技大学同济医学院公共卫生学院劳动卫生与环境卫生学系，环境与健康教育部重点实验室
- Keywords:
Particulate matter;
Mask;
Respirator;
Efficiency;
Device
- From:
Chinese Journal of Industrial Hygiene and Occupational Diseases
2020;38(4):255-258
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To develop an air particulate protective mask filter test device that can simulate the dynamics process of human breathing.Methods:The new device used two air pumps working alternately to simulate the dynamics process of human breathing. On March 4th to 17th, 2017, the new device and the traditional one-way airflow mask filtration test device were used to measure the internal and external particle levels of 39 masks of 13 models of 6 brands, and then the filtration efficiency of the mask was calculated and the test results were compared.Results:For the mask without breathing valve, there was no statistically significant difference between the filter efficiency test results of the new device and the traditional unidirectional airflow filter performance test device ( P>0.05) . For masks with breathing valves, the new device detected that three of them had lower filtration efficiency (99.50% vs 98.63%, P<0.01) . After sealing the mask breathing valve with glue, the filtering efficiency of the mask with a breathing valve detected by the new device significantly improved (98.63% vs 99.50%, P<0.01) . Conclusion:This new device can simulate the dynamic process of human exhalation and inhalation, and measure the filtration efficiency of the mask. For masks with breathing valves, the new device makes it easier to detect the decrease in the filtering efficiency of the mask caused by the breathing valve.
