Semi-open type positive-pressure air supplying and purifying helmet shield

Abstract

The invention discloses a semi-open type positive-pressure air supplying and purifying helmet shield which comprises a helmet, a shield, a power unit, an air filtering device and an air pressure and voltage alarm device as well as a static pressure box, wherein the shield is arranged in front of the helmet; a shield body extends downward to cover outside a human face; a gap is formed between the shield and the human face; the power unit comprises a fan and a power supply; the static pressure box, the power unit and the air filtering device are the arranged in the helmet; two ends of the static pressure box are an air inlet end and an air outlet end respectively; a blow-off nozzle facing downward is arranged at the front edge of the helmet; the fan in the power unit and the air filtering device are arranged in middle of the static pressure box and at the air inlet end respectively; and the air filtering device is a filter with a filter element made of an electret air filtering material. The helmet shield has functions of preventing dust, waste gas and bacterial virus, no other external connection pipeline device is required to be carried, the structure is simple, a user can conveniently wear the helmet shield and breathe smoothly and comfortably with the helmet shield.

Description

technical field [0001] The invention relates to a helmet mask, in particular to a positive-pressure air-supply semi-open air-purifying helmet mask. Background technique [0002] With the occurrence and prevalence of respiratory diseases such as SARS and bird flu, as well as the increasingly serious pollution of dust and exhaust gas in the atmospheric environment, people are increasingly aware of the importance of respiratory protection and respiratory health, and respiratory protective equipment is receiving more and more attention. more attention. However, although the relevant respiratory protective equipment has been developed for nearly a century, it is still difficult to enter people's daily life, and it is even difficult to play a role in preventing epidemics. The reason is that the current respiratory protective equipment has the following shortcomings and problems: [0003] 1. Whether it is the simplest mask or a complex gas mask, they are basically sealed, which g...

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Problems solved by technology

[0003] 1. Whether it is the simplest mask or a complex gas mask, they are basically sealed, which greatly affects the comfort of breathing;

[0004] 2. The protection effect of general products is not good, and the self-priming filter structure is usually used, which has poor air tightness and safety. It can only prevent part of the dust and cannot protect against bacteria, viruses or exhaust gas pollution.

The equipment that can protect against bacterial viruses or exhaust gas polluti

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