An anti-sneeze leakage detection device and method for a mask breathing valve

Abstract

The invention discloses an anti-sneeze leakage detection device and method for a mask breathing valve. The device comprises a water pump, a liquid filter, a liquid regulator, an atomizing nozzle, a concentration detection device, an air compressor, an air filter, a water pump and a liquid filter The liquid regulator and the liquid regulator are connected through the connecting pipe in sequence, the air compressor and the air filter are connected through the connecting pipe, the liquid regulator and the air filter are respectively connected with the inlet end of the atomizing nozzle through the connecting pipe; the outlet end of the atomizing nozzle is connected through the The connector is connected to the inlet of the breathing valve to be tested, the concentration detection device includes a sampling tube, a buffer drying bottle and a fixed-volume syringe connected in sequence through pipelines, and the outlet of the breathing valve is connected to the inlet of the sampling tube. The invention can simulate the scene where a human body sneezes while wearing a mask breathing valve at a very low cost, and detects the spray concentration sprayed from the mask breathing valve at this time.

Description

technical field [0001] The invention belongs to the field of testing devices, and in particular relates to a sneeze-proof leakage detection device and method for a breathing valve of a mask. Background technique [0002] Breathing valve masks can alleviate the stuffy feeling of wearing protective masks for a long time, so they have been widely used during the epidemic. However, due to the one-way opening characteristics of the breathing valve, it cannot prevent the exhalation of gas droplets and the like. If a virus-infected patient wears a breathing valve mask, the virus will be discharged into the environment through the breathing valve along with the droplets produced by the patient's sneezing, coughing and talking and the exhaled gas. Especially when sneezing, the human body will eject a large amount of droplets in an instant, and spread into the air at a very fast speed. However, existing mask performance testing technologies focus on the testing of mask material safe...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the deficiency of the anti-sneeze leakage detection method of the mask breathing valve at present, and provides a sneeze-proof leakage detection device and method of the mask breathing valve, which can not only simulate the sneezing scene when the human body wears a mask with a breathing valve, but also detect The spray concentration before and after the breathing valve is compared to obtain its leakage

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