Positive-pressure protection hood

Abstract

The invention relates to a positive-pressure protection hood which comprises a hood body, an air guide pipe and an air pressurization and purification device. The upper end of the air guide pipe is arranged in the hood body; the lower end of the air guide pipe is connected with the air pressurization and purification device; the hood body comprises a housing, a neck limitation sealing tape, a transparent lower hem, a visual window, a forehead fixing and supporting piece and a top transparent air bag; an air pressure stability monitoring device is arranged under the top face of the top transparent air bag in a sealing way, and is a counterweight disc with bright color; the counterweight disc goes down when the gas pressure in a gas storage chamber is reduced to a certain value; the air pressurization and purification device comprises a battery pack, a filter, an air suction unit and an electronic control board; an air inlet of the air suction unit is provided with the filter; an air outlet of the air suction unit is connected with the lower end of the air guide pipe; and the electronic control board is electrically connected with the battery pack and the air suction unit. Clean airis injected into the hood through a mechanical pressurization way, viruses are prevented from entering respiratory tract infection, and the counterweight disc reliably indicates whether the air pressure in the hood is appropriate or not, so that the safety and the conform level are improved.

Description

technical field [0001] The invention relates to the field of medical protective articles, in particular to a positive pressure protective headgear. Background technique [0002] In recent years, with the progress of society, people's production and living materials have been greatly enriched, and human life style and constant pursuit of dining style have also brought a lot of influence on the spread of germs. In addition, the global climate is warming year by year. Infectious bacteria like bacteria continue to appear, and even new infectious diseases that can be transmitted from person to person through droplets and aerosols appear. 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...

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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