CN111387584A

CN111387584A - Ventilation protective mask

Info

Publication number: CN111387584A
Application number: CN201910003282.3A
Authority: CN
Inventors: 贺淑刚; 郭顺平; 李良
Original assignee: Shenzhen Meimeimeichuangyi Medical Technology Co ltd
Current assignee: Shenzhen Meimeimeichuangyi Medical Technology Co ltd; Mehow Innovative Ltd
Priority date: 2019-01-03
Filing date: 2019-01-03
Publication date: 2020-07-10

Abstract

The invention provides a protective mask which comprises a mask main body, a nose mask, a first one-way valve, a second one-way valve, an exhaust fan and an air supply fan, wherein the mask main body comprises a support frame, a filter element attached to the outer side of the support frame and a first sealing ring connected to the inner edge of the support frame; the nose cover is of a ring-shaped structure, one end of the nose cover is connected to the inner wall of the support frame in a sealing mode, and the other end of the nose cover is used for being arranged outside the nose of a user in a sealing mode; a first chamber for covering the nose of a user is formed between the mask main body and the inner part of the nose mask; a second chamber for covering the mouth of the user is formed between the mask main body and the outer part of the nose mask; a first one-way valve is located on the mask body within the first chamber to allow gas to flow outwardly from the first chamber; the second one-way valve is arranged on the nose mask and allows gas to flow into the first chamber from the second chamber; the exhaust fan is connected to the outer end of the first one-way valve and exhausts air from the first cavity through the first one-way valve; the air supply fan is fixed on the support frame in the second chamber, is positioned on the inner side of the filter element and sends filtered air into the second chamber.

Description

Ventilation protective mask

Technical Field

The invention relates to the technical field of wearable protective devices, in particular to a ventilation protective mask.

Background

The protective mask can filter air entering human respiratory tract, and a user can effectively prevent the oral cavity or the nasal cavity from inhaling harmful substances in the air after wearing the protective mask, thereby reducing the threat of air pollution to human health. The protective mask is usually internally provided with a filter element for filtering impurities in air, and the filter element has certain thickness and density, so that the speed of air entering the inner side of the mask is influenced, and a user is prevented from breathing smoothly; meanwhile, the gas exhaled by the user is easily accumulated on the inner side of the mask, so that the protection effect and the use experience of the mask are influenced. CN201721213956.5 discloses an electric air-supplying type mask, which comprises a mask body having a left half and a right half connected to the left half; the air inlet fan is arranged on one of the left half part and the right half part; and an exhaust fan installed in one of the left half and the right half. This kind of mask can accelerate the speed that air got into and exhale gas flows out, but because the left half and the right half of the internal side of the cover body are the connected state, easily produce the diffusion between the inside filtered air that flows into the mask from the outside and the exhale gas, this makes the exhale gas absorb into user's lung again with avoiding to the protection effect of protective mask has been reduced.

Disclosure of Invention

The invention provides a ventilation protective mask, which is used for solving the problems that the existing mask is not smooth in breathing and exhaled air is easy to be inhaled by a user again.

The invention aims to provide a ventilation protective mask which comprises a mask main body, a nose mask, a first one-way valve, a second one-way valve, an exhaust fan and a blowing fan, wherein the mask main body comprises a support frame, a filter element and a first sealing ring, and the support frame is provided with an arched structure with an inward opening; the filter element is provided with a supporting structure which is approximately the same as the supporting frame, is attached to the outer side of the supporting frame and is used for filtering air flowing into the inner side of the protective mask; the first sealing ring is connected to the inner edge of the supporting frame and is used for being arranged outside the mouth and the nose of a user; the nose cover is of a ring-shaped structure, one end of the nose cover is connected to the inner wall of the support frame in a sealing mode, and the other end of the nose cover is provided with a second sealing ring which is used for being arranged outside the nose of a user; a first cavity for covering the nose of a user is formed between the mask main body and the inner part of the nose mask; a second cavity for covering the mouth of the user is formed between the mask main body and the nose mask; the first one-way valve is located on the mask body within the first chamber to allow gas to flow from the first chamber to the outside of the protective mask; the second one-way valve is arranged on the nose mask and allows gas to flow from the second chamber to the first chamber; the exhaust fan is connected to the outer side of the first one-way valve and exhausts air from the first cavity to the outer side of the protective mask through the first one-way valve; the air supply fan is fixed on the support frame in the second cavity, is positioned on the inner side of the filter element and sends air filtered by the filter element into the second cavity.

Furthermore, the support frame is provided with a mounting seat, the mounting seat is of a tubular structure, the inner end of the mounting seat is connected to the periphery of the first one-way valve and penetrates through the outer side of the filter element along the axial direction, and the exhaust fan is mounted on the mounting seat from the outer end.

Furthermore, the outer edge of the support frame is provided with a clamping groove with an opening facing the center, and the clamping groove is used for clamping the edge of the filter element.

Further, the mask main body further comprises a mask surface, wherein the mask surface is provided with an arch structure which is approximately the same as the support frame and is attached to the outer side of the filter element.

Furthermore, the first sealing ring is connected to the inner edge of the cover surface, a clamping groove with an opening facing the center is further formed in the inner edge of the first cover surface, and the clamping groove is used for clamping the edges of the filter element and the support frame.

The inner side of the protective mask disclosed by the invention is provided with the two isolated cavities, so that the gas exhaled through nose can be prevented from being diffused to the inner side of the whole protective mask, the speed of the exhaled gas flowing out of the protective mask is increased, the accumulation of the exhaled gas on the inner side of the protective mask is effectively reduced, the influence on the filtering effect caused by the condensation of moisture in the exhaled gas in the filter element is avoided, and the use comfort of the protective mask is improved; the exhaust fan is arranged, so that the exhaust rate of the exhaled air is further increased; through setting up the supply-air fan, can accelerate the inboard speed of filtered air inflow protective mask to make the user breathe more smoothly.

Drawings

Fig. 1 is a schematic view of a protective mask according to a first embodiment of the present invention.

Fig. 2 is a schematic view of the structure of a protective mask according to a first embodiment of the present invention.

Fig. 3 is a side cross-sectional view of a face shield in accordance with a first embodiment of the present invention.

Fig. 4 is an exploded view of a protective mask in accordance with a first embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

In this specification, when the protective mask is used, the side close to the face of the user is the "inside", and the side away from the face of the user is the "outside".

Referring to fig. 1 to 4, a ventilation protective mask 1 according to a first embodiment of the present invention includes a mask body 11, a nasal mask 12, a first check valve 13, a second check valve 14, an exhaust fan 15, and an air supply fan 16, wherein the mask body 11 includes a support frame 111, a filter element 112, and a first sealing ring 113, and the support frame 111 has an inward opening arch structure; the filter element 112 has a supporting structure substantially the same as that of the supporting frame 111, is attached to the outer side of the supporting frame 111, and is used for filtering air flowing into the inner side of the protective mask 1; the first sealing ring 113 is connected to the inner edge of the supporting frame 111 and is used for being arranged outside the mouth and the nose of a user; the nose mask 12 has a ring-shaped structure, one end of which is hermetically connected to the inner wall of the support frame 111, and the other end of which is provided with a second sealing ring for being arranged outside the nose of a user; a first chamber for covering the nose of a user is formed between the mask main body 11 and the inner part of the nose mask 12; a second chamber for covering the mouth of the user is formed between the mask main body 11 and the nose mask 12; the first one-way valve 13 is located on the mask body 11 in the first chamber, allowing gas to flow from the first chamber to the outside of the face shield 1; the second one-way valve 14 is provided on the nasal mask 12 to allow gas to flow from the second chamber to the first chamber; the exhaust fan 15 is connected to the outer end of the first one-way valve 13 and exhausts air from the first cavity to the outer side of the protective mask 1 through the first one-way valve 13; the blowing fan 16 is fixed to the support frame 111 in the second chamber, is located inside the filter element 112, and blows air filtered by the filter element 112 into the second chamber.

The protective mask provided by the present embodiment is particularly suitable for breathing patterns of inhalation through the oral and/or nasal cavity and exhalation through the nasal cavity. The inner side of the protective face mask is separated into two chambers by arranging the nose mask on the inner side of the face mask body, air enters the inner side of the protective face mask after being filtered by the filter element during air suction, and filtered air entering the second chamber can be sucked in the oral cavity during air suction through the oral cavity; when the nasal cavity inhales, under the action of negative respiratory pressure, air entering the second chamber can flow into the first chamber through the second one-way valve and then is inhaled into the lung of a user; when the user exhales through the nasal cavity, the exhaled air can be discharged to the outer side of the protective mask from the first one-way valve quickly and cannot be diffused into the second cavity. In addition, the exhaust fan is arranged, so that the exhaust rate of the exhaled gas in the first cavity is accelerated, the accumulation of moisture in the first cavity is reduced, and the comfort of the protective mask is improved; through setting up the supply-air fan, can accelerate the speed that filtered air flowed into the second cavity for the user breathes more smoothly.

In this embodiment, the first sealing ring 113 and the second sealing ring are made of a silicone material. The scheme ensures that the protective mask has better sealing performance with the face of a user, and can prevent unfiltered air from flowing into the inner side of the mask; in addition, because silica gel has better flexibility and biocompatibility, the comfort of the protective mask in use is ensured.

The material of the support frame is not particularly limited, and in the embodiment, the support frame 111 is formed by injection molding of a plastic material. The connection mode among support frame, filter core and the first sealing washer can have the multiple. In this embodiment, a clamping groove with an opening facing the center is formed in the outer edge of the support frame 111, and the edge of the filter element 112 is clamped in the clamping groove of the support frame 111, so that the filter element 112 can be detachably mounted on the support frame 111; the first sealing ring 113 is coupled to an inner edge of the supporting bracket 111 by two-shot molding.

In this embodiment, the first check valve 13 includes a valve seat 131 and a valve plate 132, and the valve seat is disposed on the support frame 111; the valve plate 132 is mounted on the valve seat 131 to be opened outward.

Further, the support frame 111 is further provided with a mounting seat 1111, the mounting seat has a tubular structure, an inner end of the mounting seat is arranged at the periphery of the first check valve 13 and axially penetrates to the outer side of the filter element 112, and the exhaust fan 15 is arranged on the mounting seat 1111 from an outer end.

Further, the support frame 111 is further provided with a mounting position 1112 for mounting the blowing fan 16.

Further, the number of the second check valves 14 may be one or more. In this embodiment, the face shield includes four second one-way valves 14 symmetrically disposed on the side wall of the nose mask 12.

A second embodiment of the invention provides another ventilation protective mask which differs from the first embodiment in that in this embodiment the mask body further comprises a mask cover having substantially the same arch-like configuration as the support frame, which is provided on the outside of the filter element. This scheme can make the protective mask structure more pleasing to the eye.

Furthermore, first sealing washer is connected on the top facing inner edge, still be equipped with the draw-in groove of opening towards the center on the first top facing inner edge, filter core and support frame card are established between first sealing washer and the top facing.

Further, the nose cover is fixed on the inner side of the support frame through secondary forming.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A ventilation protective mask is characterized by comprising a mask main body, a nose mask, a first one-way valve, a second one-way valve, an exhaust fan and an air supply fan, wherein the mask main body comprises a support frame, a filter element and a first sealing ring, and the support frame is provided with an arched structure with an inward opening; the filter element is provided with an arch structure which is approximately the same as that of the support frame, is attached to the outer side of the support frame and is used for filtering air flowing into the inner side of the protective mask; the first sealing ring is connected to the inner edge of the supporting frame and is used for being arranged outside the mouth and the nose of a user; the nose cover is of a ring-shaped structure, one end of the nose cover is connected to the inner wall of the support frame in a sealing mode, and the other end of the nose cover is provided with a second sealing ring which is used for being arranged outside the nose of a user; a first cavity for covering the nose of a user is formed between the mask main body and the inner part of the nose mask; a second cavity for covering the mouth of the user is formed between the mask main body and the outer part of the nose mask; the first one-way valve is located on the mask body within the first chamber to allow gas to flow from the first chamber to the outside of the protective mask; the second one-way valve is arranged on the nose mask and allows gas to flow from the second chamber to the first chamber; the exhaust fan is connected to the outer side of the first one-way valve and exhausts air from the first cavity to the outer side of the protective mask through the first one-way valve; the air supply fan is fixed on the support frame in the second cavity, is positioned on the inner side of the filter element and sends air filtered by the filter element into the second cavity.

2. The ventilation protective mask of claim 1, wherein the support frame is provided with a mounting seat, the mounting seat has a tubular structure, an inner end of the mounting seat is arranged at the periphery of the first one-way valve and penetrates through the filter element along the axial direction to the outside, and the exhaust fan is mounted on the mounting seat from an outer end.

3. The ventilation protective mask of claim 2, wherein the support frame is provided with a slot at the outer edge thereof, the slot opening towards the center, for clamping the edge of the filter element.

4. The ventilation respirator of claim 2, wherein the mask body further comprises a mask cover having substantially the same arch configuration as the support frame and disposed over the filter element.

5. The ventilation protective mask of claim 4, wherein the first sealing ring is connected to the inner edge of the mask surface, and a clamping groove with an opening facing to the center is further formed in the inner edge of the first mask surface and used for clamping the edges of the filter element and the support frame.