Protective facial mask test system and test method

Abstract

A protective facial mask test system and a test method belong to the technical field of test on protective performance of daily necessities. The test system comprises a test compartment, a head modelplaced in the test compartment, a respiration simulator, an aerosol generator and a real-time monitoring device, a laser particle counter I, a laser particle counter II, a temperature control device and a temperature and humidity sensing device are arranged in the test compartment, an air chamber is arranged in the head model, the air chamber is respectively connected with the respiration simulator, the laser particle counter II, an oral environment gas sampling tube and a nasal environment gas sampling tube; the laser particle counter I is used for measuring initial concentration of particulate matters in the test compartment; the laser particle counter II is used for measuring concentration of particulate matters after being filtered by a facial mask; the temperature and humidity sensingdevice is used for measuring humidity and temperature in the test compartment; and by virtue of control of the real-time monitoring device, the protective performance of a to-be-tested facial mask istested. The test system not only meets national standards but also can meet diversified test requirements of customers.

Description

technical field [0001] The invention belongs to the technical field of protective performance testing of daily necessities, and in particular relates to a protective mask testing system for filtering effects of masks on particles of different particle sizes in the air in environments with different temperatures and humidity. Background technique [0002] Since 2014, the country has incorporated smog weather into natural disasters for notification, and wearing a mask is the most direct and effective means of preventing smog for ordinary people when traveling. In the face of the subsequent industry chaos of various dust-proof and haze-proof masks on the market, the national organization formulated and issued the "Technical Specifications for Daily Protective Masks GB / T32610", which clarified that such protective masks The inspection specification, which includes the "test method for the protective effect of particulate matter". [0003] This method uses an aerosol generator t...

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Problems solved by technology

[0004] At present, there are mature equipment on the market that can meet the test requirements of this standard, but the function is too single, and the actual use environment of the mask is different from the standard requirements: when people walk around with a mask, the ambient temperature and humidity of the mask are not Fixed, constant temperature and humidity are not in line with the actual use; similarly, the concentration of particulate matter is not the same in different locations, and the concentration of particulate matter produced by aerosol generators should be variable in one test; the temperature, humidity, concentration of existing equipment The measurement sampling frequency is too low, especially to make up for the above two functional defects. The lower sampling frequency cannot meet the test needs under dynamic changes. These three problems are the problems that our products need to solve

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