Mask sealing degree tester

Abstract

The invention relates to a mask sealing degree tester. The mask sealing degree tester is characterized by comprising a mask puncture assembly, a flow divider, a particle growth unit, a particle detection unit, an air extracting pump and a control unit, wherein the mask puncture assembly is fixedly connected with an inlet of a two-position and three-way solenoid valve and the other inlet of the two-position and three-way solenoid valve is communicated with the atmosphere; an outlet of the two-position and three-way solenoid valve is fixedly connected with the inlet at the bottom of the flow divider; the outlet at the top of the flow divider is fixedly connected with the inlet of the particle growth unit; the outlet of the particle growth unit is fixedly connected with the inlet of the particle detection unit for calculating particle number concentration; the outlet of the particle detection unit is fixedly connected with the inlet of a tee joint; the other outlet at the bottom of the flow divider is fixedly connected with the other inlet of the tee joint; the other outlet at the bottom of the flow divider is fixedly connected with the other inlet of the tee joint through an efficient filter; the outlet of the tee joint is fixedly connected with the air extracting pump through a flow meter; and the control unit is electrically connected with the two-position and three-way solenoid valve, the particle growth unit, the particle detection unit and the flow meter respectively and is used for calculating the mask sealing degree through the obtained particle number concentration. The mask sealing degree tester can be widely applied to testing on mask sealing degree.

Description

technical field [0001] The invention relates to a mask tightness tester, which belongs to the field of permeability testing of various masks (including medical protective masks and biological protective masks). Background technique [0002] Infection of laboratory personnel or medical staff is an eternal contradiction in the contest between humans and pathogenic microorganisms. According to research on laboratory infections of unknown cause, most researchers believe that infectious aerosols formed by pathogenic microorganisms spread in the air, The selection and correct use of protective equipment for laboratory workers is an effective way to avoid infection of laboratory personnel. [0003] Ventilation resistance and load capacity are important indicators to measure the wearing comfort and service life of respiratory protective equipment, and what really reflects its protective performance is the fit of the face. WHO, the United States and the European Union require laborat...

AI Technical Summary

Problems solved by technology

Despite the above detection requirements, the existing quantitative detection methods are time-consuming and labor-intensive and the detection results are inaccurate, and there is still no special mask fit tester in the prior art to accurately test the fit of masks

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