CN214156305U

CN214156305U - Filter bag type low-resistance mask

Info

Publication number: CN214156305U
Application number: CN202023126698.1U
Authority: CN
Inventors: 韩天和
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-21
Filing date: 2020-12-21
Publication date: 2021-09-10
Anticipated expiration: 2030-12-21

Abstract

The utility model belongs to the technical field of the gauze mask technique and specifically relates to a filter bag formula low resistance gauze mask is related to. At present, people wear medical masks and N95 masks, and electric masks are all in the structural form of adopting a single-piece filter screen, the area of the filter screen is small, the resistance is large, the self-suction masks are suffocated, and the electric masks have the problems of large noise and low filter precision. The utility model aims at providing a pocket type low resistance gauze mask, the filter screen of use be by filter cloth sealing connection become the cavity bag-shaped body, constitute filtered air's filter bag, and a plurality of filter bags pass through the sealed filter screen that constitutes the multiplication of effective filtration area of intercommunicating pore stack, have reduced the filter screen resistance, effectively reduce the sense of suffocating, improve the filter fineness to the virus. Noise and vibration are reduced for the electric mask. Set up ultraviolet lamp in gauze mask air intake department, further improve the inactivation virus effect, provide the gauze mask of effective filtration and inactivation virus for the masses.

Description

Filter bag type low-resistance mask

Technical Field

The utility model belongs to the technical field of the gauze mask technique and specifically relates to a filter bag formula low resistance gauze mask is related to.

Background

The gauze mask commonly used at present is by the structural style of non-woven fabrics and the compound monolithic filter screen of melt-blown cloth, the specification of a dimension of general gauze mask: 18 x 10 cm equals 180 cm square, the effective area of the screen actually participating in the filtration of the air is not large, only in the area near the mouth and nose, about 6 x 6 cm equals 36 cm square, and only occupies 20% of the total area of the screen. Such a one-piece screen presents the following problems:

firstly, the effective area of the filter screen is small, the breathing resistance is large, people generally feel suffocating, and particularly when wearing an N95-grade mask, the resistance of the filter layer of the mask is larger, and is possibly not good for lung health after more than 4 hours.

Secondly, when the breathing resistance is large, the pressure difference between the inside and the outside of the mask is increased, the leakage of the edge of the mask is increased, and the filtering precision of pollutants is reduced.

Thirdly, the mask is wetted by the hot air or saliva exhaled, and the effect of obstructing germs is greatly reduced, which is not beneficial to the reuse of the mask.

Fourthly, the effective filtering area of the mask filter screen only accounts for 20 percent of the total area of the filter screen, the material utilization rate is low, and the mask filter screen is a disposable article and is not in line with the environmental protection concept.

In order to solve the problem of breath hold, an electric mask (Chinese patent application No. 201820141818.9), for example, an electric mask, is started to appear, an electric fan assists in supplying air, the breath hold feeling is reduced, but the electric mask is limited by space, the area of a single-layer filter screen is about 30 square centimeters, the resistance is large, and in order to keep enough ventilation quantity, the rotating speed and the power of a motor are increased; or the filtering precision of the filter screen is reduced so as to reduce the resistance of the filter screen, and the factors cause the problems that the noise and the vibration of the electric mask are large and the air filtering precision is low.

Disclosure of Invention

In order to solve the above problems, the present invention provides a filter bag type low resistance mask. Through enlarging the area of the filter screen, the filter resistance of the filter screen is reduced, the feeling of suffocation is eliminated, the sealing performance of the mask and the filter precision of bacteria, viruses and other pollutants are improved, the material utilization rate is improved, and the mask is energy-saving and environment-friendly.

The technical scheme of the utility model as follows: a filter bag type low-resistance mask comprises a mask (1), a filter screen, an exhaust check valve (14) and a mask fixing band (9), wherein the mask (1) is suitable for approximately surrounding an oral part and nostrils, the filter screen is used for receiving unfiltered air from the surrounding environment and providing the unfiltered air into the mask (1) after filtering, furthermore, the filter screen is composed of at least one filter bag (2), the filter bag (2) is hermetically connected into a hollow bag-shaped body through filter cloth (3) and is hermetically connected with a mounting plate (5), the mounting plate (5) is provided with an air inlet communicated with the inner cavity of the filter bag (2), and the air inlet of the mounting plate (5) is hermetically communicated with an air inlet (8) of the mask.

Furthermore, the filter screen is formed by overlapping and sealing a plurality of filter bags (2) through communication holes (17).

Furthermore, the filter cloth (3) is composed of filter paper, non-woven fabric, melt-blown fabric and activated carbon filter cotton singly or compositely.

Furthermore, two opposite filter cloths (3) at the communicating hole (17) of the filter bag (2) are respectively provided with a spacing piece (4), and the two spacing pieces (4) are connected through an upper support rod (19).

Furthermore, at least one ultraviolet lamp (7) is arranged at the air inlet (8) of the mask.

Furthermore, an electric fan (15) is arranged at the air inlet (8) of the mask.

Furthermore, the middle of the face mask fixing strap (9) is provided with an electric wire, so that the external battery box (10) is electrically connected with the electric element on the face mask (1).

The utility model discloses filter screen in well filter bag formula low resistance gauze mask comprises filter bag (2), filter bag (2) become the cavity pocket body by filter cloth (3) sealing connection, different with the structural style of present gauze mask universal use single filter screen, the biggest filter area of single filter screen receives face size and shape restriction, really participate in filterable effective area not big, about 36 square centimeter, if filter bag (2) comprise two filter area 60 square centimeter filter cloth (3), middle air intake area is 7 square centimeter, so total effective filter area is: 60 square centimeters x 2-7 square centimeters is 113 square centimeters. If filter bag (2) are formed by 4 such filter bag intercommunications, then total effective filter area is 431 square centimeters for 60 square centimeters 8-7 x 7 square centimeters, than the gauze mask of general 36 square centimeters effective filter area, the area has increased about 12 times, it reduces according to this proportion by a wide margin to be equivalent to respiratory resistance, then effectively reduce the sense of suffocating to inhaling the formula gauze mask, filter screen resistance has been reduced to electronic gauze mask, electric fan reduces the rotational speed and also can reach the same air volume, the fan energy consumption has been reduced, electric fan reduces the rotational speed and can show noise abatement and vibrations. Therefore, the electric mask can also improve the filtering precision grade of the filter cloth (3) and achieve better air filtering standard.

The filter bag (2) is composed of filter cloth (3), for example, a single-layer n95 standard melt-blown fabric and a single-layer waterproof non-woven fabric are compounded, the total thickness is about 0.26 mm, the flexibility of the filter bag enables the filter bag (2) to be placed in a special-shaped cavity in the face mask (1), external unfiltered air enters the hollow cavity in the filter bag (2) through an air inlet (8) of the face mask and an air inlet of the mounting plate (5) under the action of suction negative pressure of a person, the filter cloth (3) expands in the face mask (1), and the air is filtered and then is penetrated out of the filter cloth (3) to enter the cavity of the face mask (1). The simplest structural form of the filter bag (2) is a non-support structure, the filter cloth (3) forms the filter bag structure through an ultrasonic heat seal process, the consumption of support materials is reduced, the non-glue process is more environment-friendly, and the manufacturing cost is far lower than that of a fold type efficient particle filter screen. The basic shape of the fold type high-efficiency particle filter screen is a rigid square, rectangular or cylindrical geometric body, and the fold type high-efficiency particle filter screen is restricted by the shape and the size when being applied to a special-shaped cavity of a mask, so that the mask is overlarge in volume. And the corrugated efficient particle filter screen is sealed and shaped by a support and hot melt adhesive, so that the weight and the production cost of the product are improved.

The utility model discloses in be equipped with air inlet check valve (12) and exhaust check valve (14), the steam of exhaling like this or saliva can not get into the filter screen, but follow exhaust check valve (14) and discharge. The filter screen only filters air in a single direction, bacteria and viruses are adsorbed on the filter cloth (3), and the bacteria and viruses can be dehydrated and inactivated and cannot be propagated due to the unidirectional flow of the air, so that the service cycle of the filter cloth (3) is doubled.

The utility model discloses set up silica gel sealing member (13) between well face guard (1) and the face, it is good with facial laminating degree, reduce and leak, improve the filter fineness.

The utility model discloses well gauze mask filter screen only a small amount of limit portion do not participate in the filtration, and effective filter area accounts for more than 90% of filter screen total area, and material utilization is very high, and the filter screen can used repeatedly moreover, just need change the new filter screen until the filter screen reaches the regulation dust holding capacity, can greatly improve the filter cloth utilization ratio, reduces use cost, accords with the environmental protection theory.

The utility model discloses well filter bag formula low resistance gauze mask adopts external battery case (10), sets up on face guard fixed band (9), can reduce face guard weight by a wide margin.

The utility model discloses well filter bag formula low resistance gauze mask, filter cloth (3) use melt-blown cloth, reach and filter more than 0.3 micron particulate matter 95%, can filter influenza virus, novel coronavirus etc. of spreading in the air with the aerosol form. And the ultraviolet lamp is arranged at the air inlet, so that the filtering and inactivating efficiency of the virus can be more effectively improved. The filter bag type low-resistance mask provides a professional mask which can effectively filter and inactivate viruses in air for the public, is suitable for the common people and is also suitable for medical workers.

The utility model discloses well filter bag formula low resistance gauze mask also can be used to daily confrontation such granule type pollutant of haze, if filter cloth (3) are by melt-blown cloth and active carbon filter cotton complex, just can play the adsorption to harmful gas such as automobile exhaust, all help to the worker on locomotive driver and the road.

Drawings

Figure 1 is a structural side sectional view of embodiment 1 of the invention,

FIG. 2 is a half sectional view of a filter bag (2) according to embodiment 1 of the present invention,

figure 3 is a structural side sectional view of embodiment 2 of the invention,

figure 4 is a half-sectional view of the filter bag (2) of embodiment 2 of the present invention,

fig. 5 is a side sectional view of the structure of embodiment 3 of the present invention.

The mask comprises a mask body 1, a mask body 2, a filter bag 3, filter cloth 4, a spacer 5, a mounting plate 6, a front cover plate 7, an ultraviolet lamp 8, a mask air inlet 9, a mask fixing band 10, an external battery box 11, an inner plate 12, an air inlet one-way valve 13, a silica gel sealing element 14, an exhaust one-way valve 15, an electric fan 16, an air inlet nut 17, a communication hole 18, a welding bead 19, a support rod 20, a welding bead 21, a welding bead 22 and an ultraviolet lamp.

Detailed Description

The following further describes the embodiments of the present invention with reference to the drawings.

Fig. 1 is the utility model discloses structure side cut view of embodiment 1, fig. 2 is the utility model discloses filter bag (2) half cut view of embodiment 1, embodiment 1 includes face guard (1), the filter screen, exhaust check valve (14) and face guard fixed band (9), silica gel sealing member (13) with the sealed laminating of face are connected in face guard (1), the filter screen comprises 2 filter bags (2) stack, filter bag (2) are formed 1 filter bag (2) through following outer lane welding bead (18) supersound heat seal by 2 hexagonal filter cloth (3), two filter bags (2) are located inner circle welding bead (20) supersound heat seal along intercommunicating pore (17) and are connected into an organic wholely, constitute a filter screen. The mounting plate (5) is connected with the filter cloth (3) in an ultrasonic heat sealing manner, the mounting plate (5) is inserted into the mask air inlet (8) and is in threaded fit with the air inlet nut (16), so that the air inlet nut (16), the mask (1) and the filter screen are connected and fixed, and the front and back connecting surfaces of the mask (1) are provided with sealing glue layers to achieve air sealing. When the gauze mask person of wearing breathes in, external unfiltered air is under the negative pressure effect, air inlet through on the inlet nut (16) gets into filter bag (2) inner chamber, filter cloth (3) skin is waterproof non-woven fabrics, the inlayer is n95 level meltblown, unfiltered air makes filter bag (2) inflation, the cavity that forms between filtration air admission face guard (1) and inner panel (11), air inlet check valve (12) through inner panel (11) upper portion setting send the face to the face of the person, people's exhaled waste gas is discharged through exhaust check valve (14) of inner panel (11) lower part. The air inlet check valve (12) and the air outlet check valve (14) are sealed in a one-way mode by using silica gel films with the thickness of 0.4 mm.

In the

embodiment

1, 2 filter bags (2) are overlapped, if the area of a single piece of filter cloth is 60 square centimeters, the occupied area of a central hole is 7 square centimeters, the total effective filtering area of the filter screen is 60 square centimeters multiplied by 4 to 7 multiplied by 3 square centimeters which is 219 square centimeters, and compared with a common mask with an effective filtering area of 36 square centimeters, the area is increased by 6 times, which is equivalent to that the breathing resistance is greatly reduced according to the proportion, and the sense of oppression is effectively reduced for a self-suction mask. The number of the stacked filter bags is determined by the product requirement and the thickness size of the cavity between the face mask (1) and the inner plate (11).

When people's exhalation waste gas will get into filter bag (2), receive the pressure influence, air inlet check valve (12) are closed, and waste gas can't get into filter bag (2), outside exhaust gauze mask through exhaust check valve (14), the steam of waste gas can not influence the drying of filter bag (2), and filter bag (2) can used repeatedly like this and reach the abandonment standard until filter bag (2) hold the dirt volume, renew filter bag (2) again.

The air inlet nut (16), the mask (1) and the filter bag (2) are connected and fixed through the threaded fit of the air inlet nut (16) and the mounting plate (5), and the air inlet nut, the mask and the filter bag are simple and reliable in mounting, positioning and sealing structure. The filter bag (2) is convenient to replace, and the mask (1), the silica gel sealing piece (13) and the inner plate (11) are very convenient to clean and sterilize.

The whole filter bag type low-resistance mask is simple in structure, light in weight, superior to an n 95-grade mask in air tightness and filtering precision, remarkably reduced in suffocating feeling, reusable in the filter bag (2), and lower in use cost than a disposable n 95-grade mask.

Fig. 3 is a side sectional view of the embodiment 2 of the present invention, and fig. 4 is a half sectional view of the embodiment 2 of the filter bag (2), the filter screen structure and the installation method of the embodiment 2 are different from those of the embodiment 1. In the embodiment 2, two pieces of opposite filter cloth (3) at the communicating hole (17) of the filter bag (2) are respectively connected with the spacing piece (4) in an ultrasonic heat sealing way along the welding bead (21), and the two spacing pieces (4) are connected through the upper support rod (19). The spacer (4) is a hard plastic sheet with the thickness of 0.5 mm, the distance between the two spacers (4) is 1.5 mm by the support rod (19), so that the air inlet area of the stacked filter bags (2) is equal, if the diameter of the communication hole (17) is 3 cm, the air inlet area of the filter bags (2) is 3 cm multiplied by 3.14 multiplied by 0.15 cm and is equal to 1.4 square cm, the filtering capability of the filter bags is favorably and uniformly exerted, the stacked filter bags are bonded between the filter bags (2) through the planes of the two spacers (4), the filter cloth (3) of the adjacent filter bags (2) is spaced by the two spacers (4) to form the distance of 1 mm, and the gap is favorable for air flow. The mounting panel (5) of embodiment 2 cooperatees through the mounting structure external diameter face of internal diameter face and face guard (1), and its surface sets up one deck silica gel layer for during the filter screen installation, directly push the filter screen, just can make face guard air intake (8) and filter screen sealed intercommunication, the axial is done the restriction by inner panel (11) inner face, and it is just very convenient to change the filter screen like this.

The mask of embodiment 2 air intake (8) outside sets up front shroud (6), sets up ultraviolet lamp (7) in front shroud (6), has also set up one ultraviolet lamp (22) on corresponding mask (1), and these two ultraviolet lamps are UVC ultraviolet LED lamp, can not send ozone, have good inactivation effect to the virus. The effective illumination angle of each ultraviolet lamp is 120 degrees, the ultraviolet lamps are oppositely arranged, and the ultraviolet lamps have no dead angle for the illumination of the air entering the mask (1).

The embodiment 2 of the utility model provides a 2 adopts external battery case (10), and face guard fixed band (9) are the diameter 3 millimeters twin-core electric wire, and the surface is colored nylon mesh grid, the control circuit board that lithium cell and front shroud (6) inner face set up in the twin-core electric wire connection external battery case (10). The 14500 lithium battery is arranged in the external battery box (10), and 800mah is replaceable. The other ends of the two battery boxes are respectively connected with two ends of an elastic rope, and the elastic rope is buckled by a pig nose to adjust the tightness degree of the face mask (1) attached to the face. The weight of the mask can be reduced by the structure, the weight of the lithium battery and the battery box is about 40 g, if the lithium battery and the battery box are placed in the mask (1), the total weight of the mask is about 120 g, the nose bridge is pressed, a forward tilting moment is generated, discomfort can be caused after long-time wearing, the mask is moved to the mask fixing belt (9), the weight of the mask is reduced by about 40 g, and discomfort of a wearer can be effectively reduced. The user can choose to charge or replace the battery, so that the continuous service time of the ultraviolet lamp (7) and the ultraviolet lamp (22) is increased.

Fig. 5 is a side sectional view of the structure of embodiment 3 of the present invention, which is different from embodiment 2 in that the electric fan (15) is disposed at the air inlet (8) of the face mask, the electric fan (15) is smaller, lighter and lower in noise than the centrifugal fan, and the air pressure is lower, because the utility model provides a low resistance filter screen is used as the mask, the low air pressure of the axial fan, and the large flow is just suitable. After electric fan (15) opened, formed the pressure-fired in the gauze mask, in external contaminated air can't get into the gauze mask like this, exhaled waste gas was discharged more easily in the gauze mask, especially uses in summer, and the user feels can be more obvious. The user can select 3 working modes, one is that in a classroom or meeting environment, the user needs to be quiet, the user can turn on the ultraviolet lamp, does not turn on the electric fan (15), or uses a micro-wind gear of the electric fan (15); secondly, in public places, the ultraviolet lamp is turned on, and the middle wind shield of the electric fan (15) is used; in a special environment like a gymnasium, a high wind level of an ultraviolet lamp and an electric fan (15) can be used. Therefore, the filter bag type low-resistance mask can be applied to various occasions in daily life.

Claims

1. A filter bag type low-resistance mask comprises a mask (1), a filter screen, an exhaust check valve (14) and a mask fixing band (9), wherein the mask (1) is suitable for approximately surrounding the mouth and nostrils, the filter screen is used for receiving unfiltered air from the surrounding environment and providing the unfiltered air into the mask (1) after filtering, the mask is characterized in that the filter screen is composed of at least one filter bag (2), the filter bag (2) is hermetically connected into a hollow bag-shaped body through filter cloth (3) and is hermetically connected with a mounting plate (5), the mounting plate (5) is provided with an air inlet communicated with the inner cavity of the filter bag (2), and the air inlet of the mounting plate (5) is hermetically communicated with an air inlet (8) of the mask.

2. The filter bag type low-resistance mask according to claim 1, wherein: the filter screen is formed by overlapping and sealing a plurality of filter bags (2) through communicating holes (17).

3. The filter bag type low-resistance mask according to claim 2, wherein: the filter cloth (3) is composed of filter paper, non-woven fabric, melt-blown fabric and activated carbon filter cotton singly or compositely.

4. The filter bag type low-resistance mask according to claim 3, wherein: two opposite filter cloths (3) at the communicating hole (17) of the filter bag (2) are respectively provided with a spacer (4), and the two spacers (4) are connected through an upper support rod (19).

5. The filter bag type low-resistance mask according to claim 4, wherein: at least one ultraviolet lamp (7) is arranged at the air inlet (8) of the mask.

6. The filter bag type low-resistance mask according to claim 5, wherein: and an electric fan (15) is arranged at the air inlet (8) of the mask.

7. The filter bag type low-resistance mask according to claim 6, wherein: the middle of the face mask fixing strap (9) is provided with an electric wire to realize the electric connection between the external battery box (10) and the electric element on the face mask (1).