Suction-self filtering type against particle respirator filtration efficiency and leakage testing apparatus as well as detecting method

Abstract

The present invention relates to a detecting device for detecting the filtering efficiency and leakage property of the self-suction filtering type particulate-proofing respirator and the detecting method thereof. The detecting device is composed of three components of air feeding device, particulate generator and sample detecting device, and the detecting device is characterized in that the feeding air is provided by the air compressor; the particulate generator is fixedly arranged in the detecting table and is arranged with a NaCL particulate generator, a DOP particulate generator and a corn oil particulate generator; the sample detecting device includes a sample clamp, a detecting warehouse which is two laser photometers that is respectively connected with the clamp and the detecting warehouse; and the laser photometers are connected with the computer. The device can realize the detections of filtering efficiency and leakage property of the NaCL particulate, the detection of filtering efficiency of DOP particulate and the detection of leakage property of corn oil particulate. The device completes all the detecting items for detecting the filtering efficiency and leakage property of the self-suction filtering type particulate-proofing respirator, the structure of the equipment is simple and the functions are complete.

Description

technical field [0001] The invention relates to a detection device and a detection method for detecting the filtration efficiency and leakage of a self-priming filter type anti-particulate matter respirator. Background technique [0002] The self-priming filter anti-particulate respirator is a personal respiratory protection product, which is usually called a dust mask in China. Filtration efficiency and leakage are the preferred parameters for evaluating the performance of a dust mask. At present, the WA-1 dust-proof mask dust-blocking efficiency testing device developed and produced by Wuhan Institute of Safety and Environmental Protection is used in China to test the filtration efficiency and leakage rate of dust-proof masks. According to the principle of "dust method", the device uses medical talcum powder as the test medium, and under a certain dust concentration and a certain air extraction flow condition, collects dust samples before and after the mask, weighs them wi...

AI Technical Summary

Problems solved by technology

The detection principles of the filtration efficiency of anti-particulate respirators in Europe and the United States are basically the same, except for some differences in test instruments and control systems, but their core technical content is roughly the same, that is, use NaCL aerosol to detect non-oily particle filter materials, use DOP or paraffin oil aerosol is used to detect oily particulate matter filter material, and a large flow rate of 85-95L / min is used. The aerodynamic particle size of the particulate matter is about 0.3μm, but there are some differences in the generation system, particle detector and control system.

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