RU2761994C1 - Protective face mask with filter - Google Patents

Abstract

FIELD: medical equipment.

SUBSTANCE: invention relates to medical equipment, namely to a protective face mask with a filter. The mask contains a rotatable protective screen, a mask fixation unit on the head in the form of a band with a rim attached to it, passing across the head, a hinged connection of the protective screen with a band, a visor fixed to the protective screen, fans and a filter element. The visor is made of a trapezoidal shape, has a panel with holes in the front part, on which fans are installed, and is also equipped with an inclined rim installed along the perimeter of the panel with fans, on which a filter element is fixed, made with the possibility of covering the inclined rim from above with going over the rim from the outside, while tightly fitting to it. The fans are located on the panel evenly relative to the plane of symmetry with vertical axes of rotation of the impellers.

EFFECT: development of a face mask with a protective screen and filtering fans, the design of which will provide: reliable and quick installation/replacement of the filter element, balanced distribution of the load on the head, the ability to filter almost the entire volume of incoming air, as well as prevent contaminated air from entering the under mask space from below.

7 cl, 4 dwg

Description

The invention relates to medicine, namely to personal protective equipment of the population against bacterial infections, as well as direct ingress of small particles and dust into the organs of vision and respiration.

Known utility model RU 18915 U1 "Protective face mask", IPC A61F 9/04, containing an arcuate screen made of transparent material. A special knot serves as an element for fixing the screen on the head. The design of the mask creates a gap between the screen and the fixing unit. The fixation unit is made in the form of a hoop. The hoop consists of a hard arc and a soft strap. The belt, rigid arc and screen are mounted together by means of an adhesive bond.

The disadvantage of the above-described technical solution is the presence of a large gap and the absence of a filter element for cleaning the air entering the inner space of the mask.

Known solution SU 1556674 A1 "Protective mask", IPC A61F 9/06, containing a housing that consists of a box-shaped front part and a double wall. A fan with a filter element is installed in the cavity of the double wall. In the upper part of the mask, opposite the eyes, a light filter is installed, consisting of two plates fixed to the body. Moreover, the inner plate of the filter is located at an angle of 10-15 ° to the outer one, which provides a gap for the passage of filtered air from the fan into the space under the mask. An abturator is installed along the entire perimeter of the mask body, which is an elastic cuff, which, adjoining the face, prevents small particles from entering the organs of vision and respiration, as well as polluted air.

The disadvantage of this technical solution is the small volume of filtered air entering the space under the mask due to the fact that the filter element has a small filtration area.

Of the known technical solutions close in purpose and technical essence to the claimed object is a useful model RU 38110 U1 "Protective face mask", IPC A61F 9/04, containing a protective screen made of transparent material, fixed to the fixation unit. The fixation unit is made in the form of a hoop, which consists of an arc and a soft belt. On the outer side of the arc there are stops that limit the angle of rotation of the screen. The belt has a buckle that allows you to adjust the length of the belt depending on the size of the head. On the outside of the screen, on the side, there is a miniature fan, for which a hole is made in the screen. A filter is attached to the outside of the fan. The fan is powered by a miniature voltage source that can be fastened to a belt.

The disadvantage of this technical solution is the ability to filter only that volume of air that is supplied through the fan. The absence of a seal or topcoat allows fine particles and contaminated air to enter the mask space. Since the fan is located on the side, the direction of the air flow prevents small particles and unfiltered air from below the screen to be beaten off. Several more disadvantages of the fan location are its asymmetric position on the mask, which leads to imbalance during operation, also difficult left view and a high probability of the fan casing catching objects, which can lead to the mask falling off the head and, accordingly, its breakage.

Another well-known technical solution closest in purpose and technical essence to the claimed object is the invention RU 2 744 945 C1 "Protective face mask", containing a rotatable protective screen, a mask fixation unit on the head in the form of a band, at least one air supply fan, hinged connection of the screen with a rim, a filter element fixed hermetically along the upper edge of the rim and the trailing edge of the visor. The mask has a rim extending across the head from above, coupled with a rim, and a protective screen coupled with a rim of the screen along the upper edge. The spike of the screen is connected along the upper edge with a rim, which is mated on the inner side with the front edge of the visor, which has at least one fan on the lower surface. The disadvantage of this technical solution is the complexity of the installation and replacement of the filter element due to the design features of its attachment, as well as the arcuate shape of the filter element and rim. Another disadvantage is the relatively small volume of filtered air due to the small size of the installed fans, since the arcuate tapering shape of the visor does not have enough space for installing several relatively large fans of the same size. Another drawback caused by the above-described shape of the visor is the relatively small capacity of the power source installed in the space under the visor.

The technical challenge for solving the above-described disadvantages is the development of a face mask with a protective screen and filtering fans, a design that will provide: reliable and quick installation / replacement of the filter element, balanced distribution of the load on the head, the ability to filter almost the entire volume of incoming air, as well as prevent the ingress of contaminated air. air into the space below the mask.

The essence of the invention

The technical problem posed is solved by the fact that the design of the protective mask provides for the location of the fans on the visor. There is also a filter element (7) located on the visor (3) above the fans (5) of FIG. 1. To install the filter element (7), an inclined rim (3.2) of FIG. 2-4.

The design of the protective mask consists of three main elements: the protective shield (4) of FIG. 1, the fixing unit and the visor (3) of FIG. one.

The protective shield (4) of FIG. 1, covering the user's face, for example, can be made of transparent plastic and can have an arcuate shape or consist of a flat front (4.1) and side panels (4.2). The side panels are located at an angle to the plane of the front panel. The side panels (4.2) have flat brackets with holes located on the sides and are used to pivot the screen to the mask fixation unit.

The fixation unit consists of a band (1) of FIG. 1, wrapping the user's head in a horizontal plane and a rim (2) wrapping the user's head from above. The splinter (1) and the rim (2), for example, can be made of soft plastic and, in a particular case, are equipped with length adjustment mechanisms (6). Length adjustment mechanisms (6) can be made of contact tape (Velcro), plastic or steel buckle, toothed clip, etc.

Visor (3) fig. 1 and 2 is made trapezoidal and mounted on the protective screen (4), for example, by means of brackets with holes located on the sides of the visor (3). The visor (3) is installed in such a way that there is a minimum gap between the visor body and the rim (1) for unhindered lifting of the protective screen (4). In the front part of the visor (3) there is a panel (3.1) with holes, coaxially with which the fans (5) are installed. The fans (5) are located on the panel evenly relative to the plane of symmetry, which ensures the distribution of the load on the visor (3) and on the protective mask as a whole. Axial fans can be used, which are vane impellers mounted in casings. Impellers directly on the axis of the electric motors.

The fans (5) are installed in such a way that the axes of rotation of the impellers are located vertically, which in turn provides a forced flow of air from top to bottom. This technology avoids the entry of contaminated air from the bottom of the protective mask.

In the particular case of execution, to provide the possibility of adjusting the air flow rate, the fans (5) of FIG. 1 are connected to a frequency converter, which makes it possible to decrease or increase the rotational speed of the fan motors (5).

To provide the fans (5) of FIG. 1 with electricity, a power source (5.1) is installed under the visor (3).

In the particular case of a protective mask, the power supply (5.1) of FIG. 1 can be installed on the user's belt. This type of power supply location (5.1) provides for the installation of a model with a larger capacity for longer operation. The fans are connected to the power supply with a wire (5.2), which is attached to the rim of the protective mask.

In the particular case of the execution of the protective mask of the fan (5) of FIG. 1 can be powered from a 220 V network through a voltage-reducing portable power supply. The connection of the fans is also provided by a wire (5.2) fixed to the ring.

To ensure the installation and fixing of the filter element (7) on the panel (3.1) of FIG. 2 with fans, there is an inclined side (3.2) of FIG. 2, installed around the perimeter of the panel and representing a kind of "collar" for mounting the filter element (7). The collar (3.2) has a shape based on an inverted rectangular truncated pyramid with rounded corners and edges to prevent tearing of the filter element (7) material during putting on / taking off, as well as during use of the protective mask. The plane of the side is located at an angle of 5 to 95 ° outward. Any of the specified range of inclination of the rim is capable of supporting the filter element. This design feature of the side (3.2) is due to the need to prevent slipping of the filter element (7) during the operation of the protective mask.

The filtering element (7) has a design and attachment that ensures its tight fit to the rim (3.2) to prevent unfiltered air from entering the space under the mask. So the filtering element is made in the form of a "cap", capable of covering the inclined side (3.2) "collar" from above, going over the side from the outside, while tightly adhering to it.

The adhesion of the filter element (7) to the collar (3.2) "collar", in the particular case of execution, is carried out by making the entire web or the edge of the web of the filter element elastic.

In another particular case, the adhesion of the filter element (7) to the collar (3.2) "collar" is carried out due to the fact that along the edge of the filter element (7) has a tightening element, for example, a channel with a textile cord or elastic band.

In the particular case of the implementation of the filter element (7) according to any of the above-described variant, the edge of the filter on the inner side can have a silicone strip.

Also, the design and location of the filter element (7) does not impede the free rotational movement of the protective screen (4) together with the visor (3), the band (1) into the inoperative and working position.

The filter element (7) of FIG. 1 is made of woven cotton and / or non-woven synthetic fabrics. The material of the filter element (7) makes it possible to give the required shape without losing the filtering properties. In a particular case, in addition to filtering air from dust, when using a filter cloth with an antibacterial coating, it is possible to clean the air from bacteria and viruses.

The constructive solution for the location of the fans (5) and the filtering element (7) ensures that the entire volume of air is purified by forcibly pulling the air flow through the filtering element (7).

The fastening of the filter element (7) is removable, which makes it possible to dismantle it and replace it with a new one or a previously cleaned one. To dismantle the filter element (7), no tools are required, all replacement work is performed manually by the user directly on site and requires a minimum of time.

The technical result of the proposed solution is to provide the possibility of cleaning the air entering the space under the mask for breathing of the user. Filtration is carried out by means of a filter element installed in the air intake area. The entry of contaminated air from below into the mask space is blocked by the downwardly directed air flow, which is forcibly organized by means of horizontally located fans. Also, the result of the solution is to ensure a balanced load on the mask and, accordingly, on the user due to evenly spaced fans. Providing reliable and quick installation / replacement of the filter element.

Brief Description of Drawings:

in fig. 1 is a schematic view of a protective mask with a filter element on the wearer (isometric view);

in fig. 2 is a schematic view of the visor of a protective mask (front view, top view);

in fig. 3 is a schematic representation of the visor of a protective mask with an installed filter element (side view in section A-A):

in fig. 4 is a schematic view of a protective mask visor with fans and a filter element (isometric view).

Brief description of structural elements:

1 - band;

2 - rim;

3 - visor;

3.1 - panel for installing fans;

3.2 - inclined side;

4 - protective screen;

4.1 - front panel;

4.2 - side panel;

5 - fans;

5.1 - power supply;

5.2 - wire;

6 - length regulator;

7 - filter element.

Implementation of the declared decision:

Before using the protective mask, the user installs the filter element (7) by stretching its edges and putting it over the rim (3.2) by moving the edges of the filter element (7) behind its walls. After putting on, the filter element (7) is automatically fixed with an elastic band on the rim (3.2). In a particular case, the user independently fixes the filter element (7) by pulling and further tying the textile cord into the knot to be untied.

Next, the user puts on a protective mask, positioning it in such a way that the protective screen (4) is opposite the face, the band (1) covers the head in the horizontal plane, the rim (2), in turn, is from above across. Next, the user adjusts the rim (1) and rim (2) by means of the length adjusters (6), if necessary.

Then the user, after putting on and adjusting the mask, turns on the fans (5) connected to the power supply (5.1) located under the visor (3).

After turning on the fans (5), the user lowers the protective screen (4) to the working position, so that the screen completely covers the face.

Depending on the degree of air pollution in the working environment, the user has the ability to adjust the fan speed (5), thereby changing the intensity of the air flow taken through the filter element (7).

In case of critical contamination of the filter element (7), the user has the opportunity to replace it with a new one, or to clean the spent one with subsequent installation back into place. To replace the filter element (7), it is necessary to disconnect it from the inclined rim (3.2). To do this, stretch the edges of the filter element (7) and pull it towards you until the filter element is completely removed from the rim (3.2). In a particular case, to remove the filtering element (7) from the side (3.2), it is necessary to untie the knot of the textile cord and then pull the edges of the filtering element (7) to remove it.

The design of a protective mask for the face and respiratory system fully provides air filtration from solid volatile impurities, flue gases, etc. The mask significantly reduces their harmful effects on the human body. Allows you to quickly install and replace the filter element. The above effects are achieved due to the design features of the location of the fans and the use of the filter element (7) of its design and the design of its fixation, as well as due to the relatively large area of its surface.

Claims (7)

1. A protective face mask with a filter, containing a rotatable protective screen, a mask fixation unit on the head in the form of a band with a rim attached to it extending across the head, a hinged joint of a protective screen with a band, a visor fixed to the protective screen, fans and a filter element with going over the side from the outside, while tightly adhering to it, while the fans are located on the panel evenly relative to the plane of symmetry with a vertical arrangement of the axes of rotation of the impellers. 2. The mask of claim. 1, characterized in that the fans are connected to a frequency converter with the ability to adjust the rotational speed of the fan motors. 3. The mask of claim. 1, characterized in that the web or the edges of the web of the filter element are made elastic. 4. The mask of claim. 1, characterized in that the filter element has a tightening element. 5. Mask according to PP. 1, 3, 4, characterized in that the edge of the filter element web has a silicone strip on the inside. 6. Mask according to PP. 1, 3, characterized in that the filter element is made of woven cotton or non-woven synthetic fabric. 7. The mask according to claim 1, characterized in that the fabric of the filter element has an antibacterial coating.

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