RU211120U1 - protective mask - Google Patents

Abstract

The utility model relates to the field of personal protective equipment, namely to protective masks designed to protect the respiratory organs from dust, aerosols, as well as various viruses and bacteria transmitted by airborne droplets. EFFECT: creation of a protective mask with an increased level of protection against a pathogenic environment, with increased comfort of its use. The technical result is achieved due to the fact that a protective mask containing a body made of a material that does not allow air to pass through, in which a cleaning module is built in, including an initial air purification filter, a bactericidal filter in the form of a photocatalytic filter made of titanium dioxide, an electronic board, an ultraviolet spectrum LED , a switch, an accumulator and an exhaled air valve, according to the utility model, the mask is equipped with a fan located between the initial air purification filter and an ultraviolet spectrum LED operating in the radiation range with a wavelength of 250-260 nm, forming an ultraviolet light irradiation zone, inside which the said bactericidal a filter ending with an installed opaque screen that provides protection from ultraviolet radiation on the skin of the face. 4 ill.

Description

The utility model relates to the field of personal protective equipment, namely to protective masks designed to protect the respiratory organs from dust, aerosols, as well as various viruses and bacteria transmitted by airborne droplets.

In human life, associated with the risk of airborne transmission of infectious diseases caused by viruses and bacteria, it is necessary to protect the respiratory organs with special devices that block the penetration of the pathogenic environment into the respiratory organs. These devices can be of an insulating type - spacesuits and a filtering type - protective masks, respirators.

The main requirement for these devices is reliable respiratory protection, as well as an acceptable ability to carry out respiratory activity while in them.

Protective masks are relevant for protecting the respiratory organs from a pathogenic environment when working in infectious disease hospitals, animal habitats such as farms, zoos, as well as when carrying out general preventive measures for the population under the condition of various outbreaks of infectious diseases.

Known personal protective mask

https://russian.alibaba.com/product-detail/personal-wearable-air-purifiers-head-mounted-portable-mini-air-purifier-used-for-tourism-running-cvcling-mountaineerinq-outd-1600111101304. html?spm=a2700.picsearch.offer-list.89.43945f93Tn JDoo which consists of a case, the material of which does not allow air to pass through, in which a fan is built in, in front of which there is an air purification filter, an electronic board, a switch, a battery, an exhaled air valve.

The disadvantage of this protective mask is its lack of effectiveness in the detrimental effect on viruses and bacteria in cases of their penetration through the filter.

The closest technical solution is the mask described in the utility model patent of the Russian Federation No. 201491, IPC A41D 13/11, A62B 18/02 publ. 12/17/2020 Bull. No. 35.

The design of the protective mask contains a body made of a material that does not allow air to pass through, in which a cleaning module is built in, including an initial air purification filter, an ultraviolet spectrum LED, a bactericidal filter in the form of a photocatalytic filter made of titanium dioxide, an electronic board, a switch, a battery; and an exhalation valve.

A significant disadvantage of this mask is that when it is used, discomfort occurs due to the resistance of the mask material to air flow. By installing two cleaning filters and thereby increasing the protection of the respiratory system from the ingress of various viruses and bacteria transmitted by airborne droplets, this design does not provide a fan to reduce the resistance of the material to air. The body needs to make an effort, there is difficulty in breathing. Also, in the space under the mask, the temperature and humidity locally increase, the percentage concentration of gases changes. These factors can lead to local hyperhidrosis of the face, skin irritation, contribute to the development or exacerbation of chronic skin diseases, which does not allow using the mask for a long time. In addition, in people with severe vegetative symptoms, lung diseases, these factors can cause respiratory disorders (shortness of breath, shortness of breath, dizziness, etc.). In practice, this leads to the frequent removal of the mask from the face, which in turn contributes to its contamination by environmental factors (chemical, biological agents). In addition, if the mask is worn below the level of the nostrils, it makes its application ineffective.

A technical problem that has not been solved in known devices, the solution of which is provided by the present utility model, is the creation of a protective mask with an increased level of protection against a pathogenic environment, with an increased comfort of its use.

EFFECT: creation of a protective mask with an increased level of protection against a pathogenic environment, with increased comfort of its use.

The technical result is achieved due to the fact that a protective mask containing a body made of a material that does not allow air to pass through, in which a cleaning module is built in, including an initial air purification filter, a bactericidal filter in the form of a photocatalytic filter made of titanium dioxide, an electronic board, an ultraviolet spectrum LED , switch, battery; and an exhaled air valve, characterized in that the mask is equipped with a fan having at least two rotation speeds and located between the initial air purification filter and an ultraviolet spectrum LED operating in the radiation range with a wavelength of 250-260 nm, and forming an ultraviolet light irradiation zone, inside which contains a bactericidal filter, ending with an installed opaque screen to protect against ultraviolet radiation on the skin of the face, and an electronic board is made to control the fan motor and supply electricity to the ultraviolet spectrum LED.

The utility model is illustrated by drawings, which show:

in fig. 1 shows a protective mask - sectional view from above;

in fig. 2 shows a protective mask - bottom view;

in fig. 3 shows a protective mask - side view;

in fig. 4 shows a protective mask - rear view.

The protective mask contains a housing 1 made of a material that does not allow air to pass through, in which a cleaning module is built in, including an initial air purification filter 2, an electronic board 3, an ultraviolet spectrum LED 4, a switch 5, a battery 6, and an exhaled air valve 7 and a bactericidal filter 9. What is new is that the mask is equipped with a fan 8 located between the initial air purification filter 2 and the ultraviolet spectrum LED 4, operating in the 250-260 nm wavelength range, forming an irradiation zone in ultraviolet light 13, inside which the said bactericidal filter is located 9, and ending with an installed opaque screen 10, which provides protection against ultraviolet radiation on the skin of the face.

According to the International Committee of "Light" (CIE), the wavelength of ultraviolet radiation in the range of 254±10 nm effectively breaks the internal chains of DNA and RNA of harmful microorganisms, preventing them from multiplying.

Therefore, the selected radiation range with a wavelength of 250-260 nm, forming an irradiation zone in ultraviolet light 13, is the most detrimental to harmful microorganisms and is the most effective radiation.

Any breathable material coated with a layer of titanium dioxide can act as a photocatalytic filter, including a metal or plastic mesh with a fine mesh size.

The principle of operation of the photocatalytic filter is the oxidation of substances on the surface of the catalyst, which is titanium dioxide, under the action of ultraviolet radiation. Titanium dioxide, when absorbing a quantum of light with an energy of more than 4.8 eV (wavelength of ultraviolet radiation less than 260 nm), generates free charge carriers - negative electrons and positive vacancies - holes. Electrons and holes, reaching the surface of titanium dioxide, enter into redox reactions with oxygen and water vapor from the air, while toxic impurities do not accumulate on the filter, but are destroyed to harmless components of air, carbon dioxide, water and nitrogen. The resulting oxidants damage the outer shell of microorganisms, after which they can no longer multiply and die. Also, during the operation of the photocatalytic filter, ultraviolet radiation is absorbed, which additionally provides protection for the skin of the face.

The installed fan with a power of 0.4 W or more has a diameter of up to 30 mm, which creates a directed air flow, providing an increase in breathing comfort.

The battery capacity of 400 mAh ensures continuous operation of the mask for up to 4 hours.

The protective mask works as follows. With the help of switch 5, the ultraviolet spectrum LED 4 and fan 8 are turned on. The air driven by the fan passes through the initial air filter 2, being cleaned of dust and aerosols. Next, the air enters the irradiation zone 13, and is exposed to the ultraviolet spectrum LED 4. The ultraviolet spectrum LED 4 operates in the radiation range with a wavelength of 250-260 nm, and this adversely affects the remnants of viruses and bacteria that have penetrated the initial air purification filter. Then the air enters the bactericidal filter 9, which is activated by ultraviolet radiation, and enters the inside of the mask for inhalation. Going outside the 250-260 nm wavelength range is ineffective or even harmful. The radiation should not fall on the skin of the face, therefore, a protective opaque screen 10 was introduced into the design. This screen can be a separate plate or be part of the body of the cleaning module, which is not a significant obstacle to the passage of air.

Then the air enters the inside of the mask for further breathing. An electric board 3 is installed inside the case, which controls the rotation of the fan motor, as well as the supply of electricity to the ultraviolet spectrum LED 4. It is advisable to set at least two fan speeds for comfortable breathing. The whole structure is powered by the built-in battery 6, which is charged through the micro USB connector 12, and if necessary, the structure can be powered from an external battery, powered through the same micro USB connector 12, which makes it possible to significantly increase the operating time of the mask.

During exhalation, the exhaled air passes through the exhalation valve 7. After the exhalation stops, the exhalation air check valve 7 closes, for example, by the action of a spring. The materials used in the construction are safe for human health. Experimental tests have confirmed an increase in the comfort of using a mask, which provides an increased level of protection against a pathogenic environment.

Claims (1)

A protective mask containing a body made of a material that does not allow air to pass through, in which a cleaning module is built in, including an initial air purification filter, a bactericidal filter in the form of a photocatalytic titanium dioxide filter, an electronic board, an ultraviolet spectrum LED, a switch, a battery; and an exhaled air valve, characterized in that the mask is equipped with a fan having at least two rotation speeds and located between the initial air purification filter and an ultraviolet spectrum LED operating in the radiation range with a wavelength of 250-260 nm, and forming an ultraviolet light irradiation zone, inside which contains a bactericidal filter, ending with an installed opaque screen to protect against ultraviolet radiation on the skin of the face, and an electronic board is made to control the fan motor and supply electricity to the ultraviolet spectrum LED.

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