Venturi negative pressure mask

Abstract

The invention discloses a venturi negative pressure mask. The nose mask comprises filter cloth, a right nasal tube opening, a right nasal tube, a left nasal tube opening, a left nasal tube, a mouth front tube opening, a mouth front tube, a one-way exhaust valve, a nose tip blocking piece and a mask belt. The mask is mainly characterized in that a one-way exhaust valve is arranged in the middle ofthe filter cloth; a mouth front tube is arranged on the inner side of the one-way exhaust valve; the mouth front tube is designed into a venturi tube with a certain gap from the lip of a wearer; certain gaps or gaps are formed between the mouth front tube and the left nasal tube as well as between the right nasal tube and the mouth and nose of a person; according to the venturi principle, during expiration, strong air flow enables negative pressure to be formed around the mouth front tube, the left nasal tube and the right nasal tube. No matter how large the volume of a cavity in front of themouth is, waste gas cannot be diffused in the cavity all the time, the contradiction that the cavity in front of the mouth is small in volume, unsmooth in air filtration, large in volume and low in waste gas replacement rate is well solved, and the ideal wearing effects that the waste gas is completely replaced, and air suction is particularly easy are achieved.

Description

technical field [0001] The invention relates to the technical field of masks, in particular to a Venturi negative pressure mask. Background technique [0002] Masks have been used by humans for thousands of years, and it is indeed not an ordinary difficulty to improve their wearing comfort. [0003] There are all kinds of masks on the market: ones that look like a piece of cloth, ones with a large cavity in front of the mouth, ones with filters on the left and right sides of the face, and so on. [0004] During the Spring Festival that just passed, the really scary new crown pneumonia epidemic made me taste the pain of wearing a mask. I have worn all kinds of masks. What needs to be changed about the mask, I think it can be summed up in the following aspects: [0005] 1. Inhale and exhale slowly, and breathing is not easy. A cloth-like mask only has a small area in front of the mouth and nose for ventilation, and most of the rest of the area is tightly attached to the fac...

AI Technical Summary

Problems solved by technology

[0006] 2. Exhaust gas circulation, lack of oxygen for a long time

As long as it is a mask with a cavity in front of the mouth, no matter whether it has an exhaust valve or not, the exhaust gas exhaled from the mouth will always circulate in the cavity, which will make people feel suffocated and extremely uncomfortable after wearing it for a long time

[0007] 3. The heat dissipation is not good, and the face feels hot

[0008] 4. There is air leakage on both sides of the bridge of the nose, and it is easy to fog the glasses

[0009] 5. It cannot be cleaned, and the cost of a single use is high

The mask cannot be cleaned, which means that the filter fabric of the mask cannot be cleaned, and some masks with valves are thrown away after one use, which is very wasteful.

[0010] I understand that masks, this humble little daily necessities, hide a worldwide problem that has not been solved for thousands of years: the volume of the cavity in front of the mouth is small and the air cannot be filtered smoothly, the volume of the cavity in front of the mouth is large and the exhaust gas replacement rate is low. not tall

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