SU713001A1 - Protecting mask - Google Patents

Description

one

The invention relates to a lifeguard service, namely to respiratory masks for cleaning against chemical substances and can be applied in agriculture for the protection of respiratory organs in air pollution conditions.

A known protective mask comprising a transparent housing with a obturator, an exhaust nozzle, an air distribution gap, an air inlet channel communicating with the air distribution channels located on the side surfaces of the housing, one of which is connected with the air distribution to the gap

The disadvantage of this protective mask is a sufficiently large resistance to breathing, which contributes to the possibility of penetration of harmful impurities into the submask space and respiratory organs at the moment of sharp and deep.

The aim of the invention is to reduce the load on the respiratory organs and increase the degree of their protection.

This goal is achieved by the fact that the mask is equipped with a pressure condenser located in the upper part of the body and made in the form

a hood with a cavity, the upper part of the stack of which is elastic, and feedback channels with adjustable throttles, is connected to the cable for supplying air, each of the feedback channels communicating with one of the air distribution channels, one of which connected to the cavity of the pressure capacitor. In addition, the discharge nozzle is made in the form of a slit, and the upper elastic wall of the condenser cap is corrugated.

Figure 1 shows a protective mask Screen-9, side view; fig 2p

same view along arrow A on.

Protective mask Screen-9 consists of a transparent body 1, in the form of a composite hemisphere, in the side

0 surfaces of which there are air distribution channels 2 and 3, communicating between themselves and the jet element 4. Channel 2 is connected with the air distribution gap 5, and channel 3

Claims (3)

5 with cavity b of pressure condenser. The pressure condenser is made in the form of a cap with a cavity and has an airtight mounting 7 and an elastic corrugated 8 shell. Between the shells in the lower part of the circumference of the circle there is an elastic element 9 headbands. The cap together with the sealing shutter 10 strengthened in the armhole of a rigid transparent body 1, in the lower part of which there is an outlet nozzle 11 in the form of a slit. The jet element has channels 12 for supplying air, feedback channels 13 and 14 with throttles 15 and 16 and channels feedback 17 and 18, communicating with channels 2 and 3 of mask 1 The principle of the protective mask is as follows. The mask is put on the face and with the help of the fastening shell 7 of the cap and its elastic element 9 is held on the head, ensuring tight fitting of the face by the shutter 10 . P and connecting the air inlet duct 12 of the jet due to the difference in flow sections of the throttles 15 and 16 initially adjoins the wall a and the flow of air supplied to the mask through the duct 2 is directed to the distribution slit 5, from which the specified excess air enters the sub-masked prosundrand pressure washes the face and through the outlet nozzle 11 enters the atmosphere B, at the beginning of the exhalation, the pressure under the mask increases and, transferring through channels 2 and 13 to the jet element 4, deflects the jet to the wall b, overflowing the flow him air in the channel 3 of the mask. The separation of the jet from wall a and its junction to wall b at the initial moment occurs due to the impulse, pressure (pressure) caused by a sharp increase in pressure in sub-masked space B (therefore, in channel 2) at the beginning of expiration, and its retention during the whole exhalation in the position adjacent to the wall is carried out additionally and due to the vacuum in the channel 14 created by the moving in. the air distribution channel 3 of the mask 1 is redirected to the cavity b of the pressure condenser (cap) of the air flow. As the stake is filled with air, its air-permeable, longitudinally corrugated elastic shell 8, stretches and stretches, from position to it takes the position r, increasing the volume of the cavity (between itself and the mounting shell 7), and, consequently, and; the magnitude of the charge overpressure. Moreover, the longer the exhalation takes place, the more air will enter the cavity b and the more pressure will accumulate by the end of the expiration in the condenser. At the end of the exhalation, at the initial moment of inhalation, the pressure of the air in the masked space B is sharply reduced and the jet under the action of pressure in the cavity 6 transmitted to the channel 14 through channel 3, deflects the k wall a, and is additionally entrained by the flow of air the corrugated shell 8 of cavity b and is redirected through channel 2 and through slot 5 in along; the mask is simple. This causes a wound of forced blowing of the dfahani zone, removing the exhaled acid, and packing it down due to inhalation ION, preventing the penetration of harmful impurities in the breathing zone podmasochnogo space through the discharge nozzle 11. At the end of inhalation {beginning of exhalation) mask work cycle is repeated. By changing the ratio of the flow areas of the adjustable chokes 15 and 16. and the pressure at the inlet of the air inlet 12, depending on the required value of pulmonary ventilation, determined by the weight and intensity of the work performed by the person, the mask adjusts to any mode of automatic reduction of the expiratory resistance to minimum values and maintaining a predetermined excess air pressure under the mask during the entire inhalation with improved protective properties and more complete removal of the exhaled vapor and gas extract zvyh products of vital activity of the body. Such an improvement in the protective and physiological and hygienic characteristics of the mask significantly reduces the load on the respiratory organs and the body as a whole when using known protective devices, and provides for more favorable working conditions, increasing its performance. Formula 1: A protective mask containing the obturator, the exhaust nozzle, the air distribution gap, the air inlet channel, connected with the air defining channels located on the side surfaces to Caps, one of which is associated with the air distribution gap, characterized in that, in order to reduce the load on the respiratory organs and increase their protection, it is equipped with a pressure condenser located in the upper part of the body and made in the form of a cap with a cavity, the part of the wall of which is elastic, and feedback channels with adjustable throttles connected to the air supply channel, each of the feedback channels communicating with one of the air distribution of the sanals, one of which is connected to the floor spine of pressure capacitor. 2. The protective mask according to claim 1, wherein the discharge nozzle is made in the form of a slit. 3. Protective mask according to claim 1, 6 tons feeding with the fact that The elastic wall of the pressure condenser cap is corrugated. Sources of information taken into account in the examination 1, USSR Author's Certificate 581811, cl. A 62 B 18/02, 1974 (prototype). eleven 1 17 FIG. g