RU2738184C1 - Protective mask with carbon filter - Google Patents

Abstract

FIELD: personal protection equipment.

SUBSTANCE: invention relates to individual protection, in particular to medical face masks with carbon filters, and can be used in general medical practice for individual respiratory protection against airborne infections, as well as protective mask for workers of medical institutions and laboratories. Protective mask with carbon filter comprises housing with device for its attachment on face of wearer and chamber with filter, installed in front face part of housing, wherein the filter is made in the form of a blister package consisting of a substrate film with blisters, the blisters are presented with activated carbon tablets, and in the substrate film, respectively blisters, is made with at least one hole, a diameter smaller than the diameter of the blister, chamber has shape of pocket corresponding to size and shape of blister package, at that housing and chamber are made of woven or non-woven materials.

EFFECT: simplification of carbon filter device, reduction of negative effect of water vapors from exhaled air on activated charcoal of filter and provision of disposable nature of protective mask.

1 cl, 3 dwg

Description

The invention relates to the field of personal protection, in particular to the field of medical face masks with charcoal filters, and can be used in general medical practice for personal protection of the respiratory system from infections transmitted by airborne droplets, as well as as a protective mask for workers in medical institutions and laboratories ...

Known is an anatomically shaped medical mask having a cup-like shape to fit over the user's mouth and nose, containing the mask body and means for attaching the mask to the user's head, and the mask body is made of a fabric with the formation of folds in it, and a shape retainer is placed inside the mask body, while the body of the mask in the initial state has an inverted trapezoidal shape, in which the small base of the trapezoid is intended to be placed in the user's chin area, and the large base of the trapezoid is intended to be placed in the area of the user's nose (utility model patent RU 182435, A41D 13/11, 2018).

Known medical antibacterial mask made of multilayer nonwoven material impregnated with antimicrobial and antibacterial solution consisting of hydrogen peroxide, food vinegar, colloidal silver, diluted in an alcoholic hawthorn tincture of a mixture of essential oils of tea tree, thyme and eucalyptus (patent RU 2656198, patent RU 2656198 00, 2018).

Known protective mask, two-layer structure of filtering material, folded structure of the filtering surface of the respiratory unit, increasing its area and flexible insert-nose piece for a snug fit of the upper edge of the mask to the face (patent US 5699791, A41D 13/11, 1997).

Known foldable flat face-piece respirator, including elements (seams, folds and folds), which allow the respiratory unit to open and take the mask to the shape of a bowl (US patent 6568392, A41D 13/11, 2003).

Known therapeutic prophylactic mask containing a mask and straps for attaching to the head, and the mask has holes and a protrusion designed to put on a removable plastic canister with holes on both sides, while filtering substances are placed in the canister (patent RU 2187232, A41D 13 / 11, 2000).

Known medical mask, containing a housing with a drain neck and a stopper in the lower part, a sleeve, an obturator and a valve of metered expiratory resistance, and it is equipped with a mouthpiece in the form of alveolar petals and a removable nipple located on the pipe inside the mask, and the pipe is made with holes for breathing ( patent SU 1437033, A61M 16/06, 1986).

Known is a disposable medical mask containing a filter element made of a woven or non-woven fabric filter material and two flexible inserts built into the filter element, the upper insert-nosepiece serves for better adherence of the mask to the face, and the lower shaping insert serves to fix the shape of the respiratory unit, located horizontally, dividing the respiratory unit into approximately two halves: upper and lower (patent RU 110937, A41D 13/11, 2011).

Known blister pack, device and method for the manufacture of blister pack, including a film-substrate having blisters, and a flat film-patch connected thereto, containing at least two parallel rows of blisters, between which an intermediate part is formed, having at least at least two fold lines parallel to the indicated rows, and the blisters of one row are displaced relative to the blisters of the other row so that after folding the blisters in rows with contacting come into each other (patent for utility model RU 2174487, B65D 75/36, A61J 1/03 , 1996).

The closest in technical essence is a protective medical mask containing a body with means of attachment to the wearer's face and a germicidal chamber in the front face of the body, the germicidal chamber is equipped with an input filter and a UV radiation source with an amalgam gas discharge lamp connected to a power supply unit located at the back of the head ( utility model patent RU 173502, A41D 13/11, 2017).

The disadvantages of the known devices are the complexity of the design of the filter elements, the strong negative effect of water vapor in the exhaled air on the filter, which reduces the adsorption capacity of activated carbon and the lack of disposability, which does not allow the used contaminated device to be disposed of.

The technical result is to simplify the device of the carbon filter, reduce the negative impact of water vapor from the exhaled air on the activated carbon of the filter and ensure the disposability of the protective mask.

The technical result is achieved in that a protective mask with a carbon filter comprises a housing with a means for attaching it to the face of the wearer and a camera with a filter installed in the front face of the housing, and the filter is made in the form of a blister package consisting of a backing film with blisters, blisters are represented by tablets of activated carbon, and in the substrate film, respectively blisters, at least one hole is made, with a diameter less than the diameter of the blister, the chamber has the shape of a pocket corresponding to the size and shape of the blister package, while the body and the chamber are made of woven or non-woven fabrics.

The essence of the invention is illustrated by graphic materials, where in Fig. 1 shows a face shield with a charcoal filter, cross section; in fig. 2 - a filter in the form of a blister pack, front view; in fig. 3 - a filter in the form of a blister pack, rear view.

A protective mask with a carbon filter contains a housing 1 with a means for attaching it 2 to the wearer's face and a camera 3 with a filter in the form of a blister pack 4.

The body 1 and the chamber 3 are made of woven or non-woven materials with disinfectant impregnations, intended for the manufacture of disposable protective masks.

The chamber 3 has the shape of a pocket corresponding to the size and shape of the filter blister 4, sewn to the body 1 on three sides. The upper side of the camera 3 in the form of a pocket, facing the user's nose, remains open, not sewn to the body 1.

In the chamber 3, a filter is installed in the form of a blister pack 4, containing at least two parallel rows of blisters in the form of activated carbon tablets 5.

In the film-substrate of the blister pack 4, respectively, to each blister in the form of tablets of activated carbon 5, a hole 6 is made, 5-10 times less than the diameter of the tablets of activated carbon 5.

It is possible to make several microscopic holes 6 corresponding to each of the activated carbon tablets 5, the diameter of which is ten times smaller than the diameter of the activated carbon tablets 5.

The blister pack 4 is used without a film-lining, which makes the activated carbon tablets 5 open on one side facing outward towards the chamber 3 in the form of a pocket.

A protective mask with a charcoal filter is used as follows.

The user removes the film-strip made of aluminum foil or paper from the blister pack 4, thereby opening the activated carbon tablets 5 on one side, and then sets the blister pack 4, overcoming friction with the chamber 3 in the form of a pocket, which crimps and fixes the blister pack 4.

In this case, the substrate film of the blister pack 4 is oriented with the holes 6 towards the body 1, and the open activated carbon tablets 5 outward, towards the chamber 3 in the form of a pocket.

The user puts on a protective mask with a charcoal filter on the face and fixes it with a means for attaching 2 to the face, and then inhales. Under the action of the sucking force of vacuum in the lungs, caused by the lowering of the diaphragm, air from the external environment through the chamber 3, which acts as a mechanical filter, through the activated carbon tablets 5, through the holes 6 in the blister pack 4, through the body 1 will enter the undermask space and then into the lungs user.

The air from the external environment, passing through the activated carbon tablets 5, will be purified due to its adsorption qualities, the pores of which increase the absorbing surface of 1 g of activated carbon to 500-1000 square meters.

Subsequent exhalation of the user will contain 3-4 times more water vapor, which reduces the adsorption capacity of activated carbon. However, the air exhaled by the user will encounter small holes 6 in the blister pack 4 on its way, which will direct the exhaled air around the blister pack 4 between the rows of blisters, as well as through the material of the chamber 3 in the form of a pocket and the material of the body 1.

In this case, the moist exhaled air will enter the activated carbon tablets 5 in a minimum amount, which will preserve the adsorption properties of the activated carbon, as well as keep the activated carbon tablets 5 from destruction as a result of exposure to humid air, because blister pack 4 conforms to the shape of tablets, ensuring the preservation of the shape of activated carbon tablets 5.

If it is necessary to change the filter in the form of a blister pack 4, the spent blister pack is removed from the chamber 3 in the form of a pocket, and in its place a new blister pack 4 with activated carbon tablets 5 with a previously removed film strip is installed.

Dispose of the protective mask with a charcoal filter after use. it has a low cost and is made of cheap woven or non-woven materials with disinfectant impregnation.

The technical result of simplifying the device of the carbon filter is achieved by its implementation in the form of discrete tablets of activated carbon, placed in a blister pack without the use of tubes for supplying and removing air, partitions and other elements.

Reducing the negative effect of water vapor on carbon from exhaled air is provided by small holes in the blister pack that allow inhalation through activated carbon tablets, but direct the exhaled air with water vapor bypassing the activated carbon tablets.

The disposability of the protective mask is achieved by using inexpensive woven or non-woven materials with disinfectant impregnation and a filter chamber in the form of a simple pocket made of the same inexpensive material.

Claims (1)

A protective mask with a carbon filter, containing a body with a means for attaching it to the face of the wearer and a camera with a filter installed in the front face of the body, characterized in that the filter is made in the form of a blister pack consisting of a backing film with blisters, blisters are represented by tablets activated carbon, and at least one hole is made in the substrate film, respectively, of the blisters, with a diameter smaller than the blister diameter, the chamber has the shape of a pocket corresponding to the size and shape of the blister package, while the body and the chamber are made of woven or nonwovens.

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