Positive pressure elastic protective head cover

Abstract

The invention provides a positive pressure elastic protective head cover. The positive pressure elastic protective head cover comprises a head cover body, an air guide pipe and an air pressurization and purification device, wherein the upper end of the air guide pipe is arranged in the head cover body; the lower end of the air guide pipe is connected to the air pressurization and purification device; the head cover body comprises a cover piece, a neck limiting sealing tape, a transparent lower hem, a visual window, a forehead fixed supporting part and a side transparent air storage bag; the whole surface of the side transparent air storage bag is made of a plastic film; the side transparent air storage bag is located on the side or rear of the cover piece; when the air pressure in an air storage chamber is reduced to a certain value, the side transparent air storage bag is collapsed inwards by the external atmospheric pressure; when the side transparent air storage bag is used, the resilience force of the elastic film of the side transparent air storage bag maintains the positive pressure in the head cover all the time, and the air pressure in the head cover is indicated through the change of the size of the air storage chamber; the air pressurization and purification device comprises a battery pack, a filter, an exhaust fan group and an electric control board; and the air guide pipe is used for supplying air into the head cover. Filtered clean air is injected through the mechanical pressurization in the head cover so as to prevent viruses from entering the respiratory tract to infect a user. The size change of the transparent air storage bag reliably indicates whether the air pressure in the head cover is appropriate, and thus, the safety is improved.

Description

technical field [0001] The invention relates to the field of medical protection products, in particular to a positive pressure elastic protective head cover. Background technique [0002] As we all know, in recent years, new infectious bacteria have emerged continuously, and their transmission routes can even be transmitted through droplets and aerosols between people, so the requirements for protection are getting higher and higher. Outbreaks of severe infectious diseases such as the well-known SARS and Ebola, as well as the recent new coronavirus have brought great risks to front-line medical staff. At present, the protection of medical staff mainly relies on masks and protective glasses, sometimes with protective screens and protective clothing, and very rarely uses fully enclosed chemical protective clothing. Although chemical protective clothing can provide comprehensive protection, it is very expensive, complicated, time-consuming and extremely uncomfortable to put on...

AI Technical Summary

Problems solved by technology

Although chemical protective clothing can provide comprehensive protection, it is very expensive, complicated, time-consuming and extremely uncomfortable to put on and take off. Positive pressure, protect the skin of the whole body from contact with harmful substances, and will not inhale harmful substances through the respiratory tract), but for respiratory diseases that are mainly transmitted by air, it is a bit overprotected and even wasteful

And masks and protective goggles, even with protective screens and protective clothing, cannot completely avoid the inhalation of extremely fine pathogens (such as viruses) from the gaps of masks and protective goggles, etc., and it is difficult to block transmission routes such as aerosols

[0003] In order to solve the above technical problems, prevent the spread of airborne diseases and protect people working in dirty air, positive pressure hoods have appeared in reality, but the current positive pressure hoods are either very complicated and use very large flow The airflow maintains a positive pressure, the battery life of the power supply is very short, and the user's mouth and tongue are dry and the eyes are uncomfortable; or the airflow is not enough, especially when the internal pressure drops when inhaling, an accurate barometer is required to monitor at any time, and the structure is complex

At the same time, the tidal fluctuations in gas demand in today's hoods during exhalation and inhalation and their ability to maintain positive internal pressure at all times also pose challenges. Excessive airflow is not easy to lose internal positive pressure but blows uncomfortable, and it also makes the device The battery life is shortened, and the monitoring of the real-time barometer is complicated and unreliable. How to solve the problem that the air supply volume is basically constant but the air demand volume fluctuates greatly and the minimum positive pressure is maintained has become a problem that was difficult to solve on portable devices before.

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