Respirator field protection factor evaluation system and method

A technology of protection factor and evaluation system, which is applied in the direction of measuring devices, scientific instruments, suspension and porous material analysis, etc., can solve problems such as difficult to characterize the on-site protection factor of respirators, so as to avoid evaluation errors, ensure life safety, and ensure breathing Healthy effect

Pending Publication Date: 2022-01-28
CHINA UNIV OF MINING & TECH
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Problems solved by technology

[0009] Therefore, the above-mentioned methods for developing the protection factor of respirator filter materials and evaluating the tightness of respirator masks are quite different from the actual application scenarios of respirators in the field, that is, the filtration efficiency of respirators measured under controlled conditions in the laboratory and its tightness are difficult to characterize the real field protection factor of respirators

Method used

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  • Respirator field protection factor evaluation system and method
  • Respirator field protection factor evaluation system and method
  • Respirator field protection factor evaluation system and method

Examples

Experimental program
Comparison scheme
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Embodiment

[0085] Embodiment: test and evaluate respirator to the on-the-spot protection factor of PM10 sub-size particle;

[0086] Step 1: The detachable internal and external sampling system selects the detachable PM10 sampling device, and the harmful substance concentration detection system selects the MIE light scattering method dust detection subsystem;

[0087] Step 2: Complete the sampling process from S1 to S7, and use the internal and external sampling devices of the respirator mask to collect dust on the internal and external filter membranes under the same sampling time and the same sampling flow rate;

[0088] Step 3: Place the inner and outer filter membranes that have collected the dust in containers filled with a transparent sodium hexametaphosphate aqueous solution. The container has a built-in magnetic stirring bar, and the magnetic base is used to form a relatively stable and uniform dust through non-contact magnetic stirring For the suspension, in a dark room, use the ...

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Abstract

The invention discloses a respirator field protection factor evaluation system and method. The respirator field protection factor evaluation system comprises an outer sampling system, a power device, an exhaust heat dissipation hole, an inner sampling system, a respirator mask, a wearing device and a noxious substance detection system. According to different types of harmful substances, the internal/external sampling system respectively comprises a detachable dust sampling device, a detachable toxic and harmful gas sampling device and a detachable microorganism sampling device which can be selected; and the noxious substance detection system comprises an optional dust detection subsystem, a poisonous and harmful gas detection subsystem, a bacterium detection subsystem and a virus detection subsystem. According to the invention, the measurement of protection factors of different harmful substances by the respirator in a real operation site can be realized, the respiratory protection is scientifically guided, and the life safety and health are guaranteed. According to the invention, the measurement of protection factors of different harmful substances by the respirator in a real operation site can be realized, the respiratory protection is scientifically guided, and the life safety and health are guaranteed.

Description

technical field [0001] The invention relates to the technical field of respiratory protection, in particular to an on-site protection factor evaluation system and evaluation method for respirators. Background technique [0002] The protection factors of existing respirators against dust, toxic and harmful gases, viruses and bacteria are mainly measured in the confined space of the laboratory, based on relevant respirator test standards and under specified test conditions. The specific test methods can be divided into two types: : [0003] Carry out the filtration performance evaluation of the respirator filter material, that is, completely seal the respirator on the human head model and place it in a uniform and constant harmful substance concentration environment, apply a constant suction flow to the human head model to simulate the human inhalation process, and test the respirator mask The concentration of internal and external harmful substances is used to calculate the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08G01N15/06
CPCG01N15/08G01N15/06G01N2015/084G01N2015/0846G01N2015/0693
Inventor 朱金佗张馨木梁琛裕何新建王亮荆鹏俐陈梦林郝雅馨
Owner CHINA UNIV OF MINING & TECH
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