Filtering efficiency detector of air filter materials

A technology of air filtration material and filtration efficiency, applied in suspension and porous material analysis, measuring devices, scientific instruments, etc., can solve problems affecting the accuracy of test results, danger to test personnel, etc., to achieve accurate and reliable test results and eliminate errors. , the effect of protecting personal safety
CN101629892AInactive Publication Date: 2010-01-20QINGDAO ZHONGRUI INTELLIGENT INSTR
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
QINGDAO ZHONGRUI INTELLIGENT INSTR
Publication Date
2010-01-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a filtering efficiency detector of air filter materials, which can solve the problems that the detection result accuracy is affected and the detection personnel are possible in a danger caused by different sampling conditions in the prior art. The invention adopts the following technical scheme that: the filtering efficiency detector of air filter materials comprises a case portion, a double-gas path comparison sampling portion and a bracket portion; the double-gas path comparison sampling portion is provided with two output sampling gas paths capable of performing comparison sampling to the two samplers from the same fog chamber via two sets of identical gas paths, thereby ensuring the same sampling condition of two comparison samplings and accurate and reliable detection result; besides, the double-gas path comparison sampling portion is located in a negative-pressure cabinet which fully considers the human safety of test operators and all test devices are gathered into a negative-pressure cabinet similar to an III-level safety cabinet, so that the testers keep away from harmful substances such as bacteria, thereby protecting the detection personnel.
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Description

technical field

[0001] The invention relates to detection equipment for air filter materials, in particular to a detection device for the filtration efficiency of particulate matter in air filter materials, that is, a filter efficiency detector for air filter materials. Background technique

[0002] Now more and more air filter materials are used in our medical and production activities, such as medical surgical masks, gauze, etc., and their filtration efficiency needs to be tested with special inspection equipment and inspection methods. For example, the bacterial filtration efficiency test of medical surgical masks in my country is carried out in accordance with the provisions of "Appendix B Bacterial Filtration Efficiency (BFE) Test Method" in "YY0469-2004 Technical Requirements for Medical Surgical Masks", among which the application of Staphylococcus aureus method is the most widely. This detection method can detect the bacterial filtration efficiency of medical surgica...

Claims

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