Testing device and inspecting method for low temperature transparency remaining of protective mask

Abstract

A test apparatus for the property of clearness protection of guard mask in low temperature and its measuring method are provided. The test apparatus includes electrical breathing machine, air conducting pipe, constant temperature moistener, low temperature box, standard human head and guard mask worn on the standard human head. When the electrical breathing machine breaths out, the air stream breated out is conducted to the constant temperature moistener to heat and to moisten, and the air stream output is fed through the air conducting pipe to the standard human head in the low temperature box and then discharged through the out-valve of the guard mask out of the lower temperature box; when the electrical breathing machine breaths in, it draws the cool air in the low temperature box through in-valve of the guard mask to the inner part of the window of the guard mask.

Description

technical field [0001] The invention relates to a low-temperature protection performance test device and a detection method of a protective mask, in particular to a device and a detection method that can replace human breathing and perform a low-temperature protection performance test of a protective mask in a low-temperature environment. Background technique [0002] The existing measuring method of the low-temperature protection performance of the protective mask is to carry out a test in a low-temperature room or in a field environment in a severe cold season after a person wears the mask. This measurement method has the following disadvantages: ①Due to individual differences in human faces, the test data is scattered and the error is large; ②When people are in a low-temperature environment, due to the cold and wearing a mask to press the head for too long, it is easy to cause headaches and it is difficult to persist. The repeatability of the measurement results is poor; ...

AI Technical Summary

Problems solved by technology

This measurement method has the following disadvantages: ①Due to individual differences in human faces, the test data is scattered and the error is large; ②When people are in a low-temperature environment, due to the cold and wearing a mask to press the head for too long, it is easy to cause headaches and it is difficult to persist. The repeatability of the measurement results is poor; ③ It is difficult to find the cause of poor brightness when using human experiments; ④ It is expensive and time-consuming to rely on low-temperature chambers and severe cold seasons for experiments

So far, there have been no reports of using special instruments to measure the low-temperature protection performance of protective masks at home and abroad.

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