CN212491965U

CN212491965U - Filtering device and protective device for personal protection of coronavirus

Info

Publication number: CN212491965U
Application number: CN202020757151.2U
Authority: CN
Inventors: 韩坤; 解国良; 孙中刚; 董亮
Original assignee: Suzhou Tianfeng Dynamic Alloy Technology Co ltd
Current assignee: Suzhou Tianfeng Dynamic Alloy Technology Co ltd
Priority date: 2020-05-09
Filing date: 2020-05-09
Publication date: 2021-02-09
Anticipated expiration: 2030-05-09

Abstract

The utility model provides a filter equipment, protective device for coronavirus personal protection, filter equipment includes: the filter comprises a filter bottle, an air inlet arranged on the filter bottle, a filtering copper net, a filtering layer and a first porous activated carbon interlayer which are sequentially arranged in the filter bottle along the airflow flowing direction; the air inlet hole, the filtering copper net, the filtering layer and the first porous activated carbon interlayer can sequentially block and filter millimeter-level, micron-level and nanometer-level impurities from outside to inside. The utility model discloses can realize protecting device's repetitious usage and safety cleaning, have higher protection security, adapt to multiple crowd's demand, show to reduce and retrieve the degree of difficulty and environmental pollution.

Description

Filtering device and protective device for personal protection of coronavirus

Technical Field

The utility model mainly relates to the technical field of virus protection, in particular to a filtering device and a protective device for personal protection of coronavirus.

Background

Coronaviruses belong phylogenetically to the order of the nested viruses (Nidovirales) the family of Coronaviridae (Coronaviridae) the genus coronaviruses (Coronavirus). The health hazard of coronavirus to human is very serious, and 7 kinds of coronavirus which can infect human are known at present, which are 2019-nCoV, HCoV-229E, HCoV-OC43, HCoV-NL63, HCoV-HKU1, SARS-CoV (causing severe acute respiratory syndrome) and MERS-CoV (causing middle east respiratory syndrome), respectively.

The 2019-nCoV virus causes wide infectious epidemic situation worldwide and the number of infected people breaks through millions, so that the virus is an infectious disease source which needs to be mainly prevented in all countries at present. Because the 2019-nCoV virus has strong infectivity and also has the ability of people to transmit people in the latent period, the protective measures become important problems that people limit the virus transmission and protect the life safety of the people. According to the research of medical experts in China, the protective tools such as a mask can be worn correctly to effectively isolate the transmission of viruses, and the obvious protective effect is achieved. Wherein the medical surgical mask can prevent the spread of droplets. The KN 95-grade mask has a 95% filtration efficiency for the most penetrating particles, which are 0.3 microns in diameter and are easily intercepted, either larger or smaller. The diameter of the coronavirus is generally about 0.1 micron, the coronavirus is spread through droplets, the diameter of the droplets is 1-5 microns, and the two masks with the diameters of KN95 can be protected. There is actually also a higher KN100 filtration efficiency, 100% but too much breathing resistance, which is not suitable for most people.

In order to combat epidemic situations, the mask is more and more valued in use, and the influence on the daily life of people is greater and greater. Although the effect of the mask is obvious, in the long-term use process, some problems may exist:

(1) the problem of repeated use is solved. The mask is a protector which is in direct contact with the face, and generally can only be discarded after being used for 3-4 times, but in some occasions where high risk people are likely to be contacted, the mask needs to be replaced after being used once. Moreover, studies have shown that after the mask is washed with water, the fibrous structure of the mask is destroyed, resulting in a reduction in its protective ability.

(2) And the recycling problem is solved. Surgical medical masks and medical masks of grades such as N95 are mainly made of organic cloth made of high polymer materials in a laminated mode, and the functions of protecting particles, preventing spray from permeating, dehumidifying and the like are achieved from outside to inside. Therefore, after the mask is used, the mask is discarded as garbage, which causes environmental pollution. The outer surface of the mask may be contaminated with viruses, and the novel coronavirus can survive on the solid surface for a certain time, so that the safety of cleaning personnel and mask recycling personnel can be endangered.

(3) The contradiction between the protective effect of the mask and the smooth breathing is solved. According to the related standards, the higher the protection degree of the mask is, the lower the air passing rate is while protecting various impurities, harmful particles and droplets. For example, although a mask with FTPP100 or more can block related harmful substances by 100%, the ventilation amount is extremely low, and normal breathing is hardly possible. Particularly for some people with respiratory diseases, the mask can bring oppressive feeling and is uncomfortable to wear.

(4) Not fit all people's face. The mask with the same shape may not adapt to the face shape of all people, so that the face of some people cannot be well attached to the mask, and the protection effect of the mask is affected.

(5) Influence of long-term wearing of the mask. For medical staff, border inspection, traffic posts, community workers, re-work service staff, volunteers and other related workers, the contacted people are numerous and have strong mobility, and the mask needs to be worn for a long time. From reports and network news, the mask worn for a long time is easy to leave marks on the face and even scratch, and potential safety hazards are caused to related workers. In addition, some people have skin allergy to contact mask materials and are not suitable for wearing.

In addition, many masks fail after being worn for a certain period of time, even if the mask is not replaced. For example, the protective effect is significantly reduced after the medical mask is worn for several hours, and the use of the mask is not recommended.

SUMMERY OF THE UTILITY MODEL

For solving the not enough of prior art, the utility model discloses combine prior art, from practical application starting, provide a filter equipment, protective device for coronavirus personal protection, can realize protective device's repetitious usage and safety cleaning, have higher protection security, adapt to multiple crowd's demand, show to reduce and retrieve the degree of difficulty and environmental pollution.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

according to an aspect of the present invention, there is provided a filter device for personal protection against coronavirus, comprising: the filter comprises a filter bottle, an air inlet arranged on the filter bottle, a filtering copper net, a filtering layer and a first porous activated carbon interlayer which are sequentially arranged in the filter bottle along the airflow flowing direction;

the air inlet hole, the filtering copper net, the filtering layer and the first porous activated carbon interlayer can sequentially block and filter millimeter-level, micron-level and nanometer-level impurities from outside to inside. The utility model discloses a filter equipment passes through the multilayer, and the defensive ability scales up, and the degressive filtration in fibre clearance combines mandatory gas circulation, strengthens filtering capability and air throughput, and harmful substance such as isolated 0.1 micron's virus, 1-5 micron droplet particles promote barrier propterty, improve the breathing comfort.

Furthermore, the filtering copper net is a copper net with the pore size of 100-300 microns and the thickness of 50-500 microns.

Furthermore, the filtering layer is 3-5 layers, and from outside to inside, the filtering layer is respectively 1-2 spunbond layers, 1 meltblown layer and 1-2 spunbond layers.

Furthermore, the spun-bonded layer is a non-woven fabric filter layer consisting of polypropylene PP material fibers with the diameter of 10-20 microns, and the melt-blown layer is a melt-blown fabric filter layer consisting of polypropylene PP material fibers with the diameter of 0.5-10 microns.

Furthermore, the filtering copper net, the filtering layer and the first porous activated carbon interlayer are sequentially arranged in the filtering bottle at intervals and can be detached independently.

The utility model discloses in, carry out the components of a whole that can function independently design according to the functionality of filter layer, realize that more efficient is clean, retrieve, make the protective equipment realize used repeatedly many times to reduce environmental pollution.

According to another aspect of the present invention, there is provided a protective device, comprising a face guard, a gas cylinder, and the above-mentioned filtering device;

wherein, the face protector is provided with an air suction hole and an air expiration hole;

the filter bottle is connected with the gas storage bottle through a conveying pipe and is used for conveying filtered air to the gas storage bottle;

the gas storage bottle is connected with the air suction hole through the air suction pipe and is used for conveying filtered fresh air to the face protector;

the exhalation port exhausts the exhaled gas to the outside through the exhaust pipe;

the air suction pipe, the delivery pipe and the exhaust pipe are all provided with one-way valves for ensuring the air flowing direction.

Further, a second porous activated carbon interlayer is arranged in the gas storage cylinder.

Further, an air inlet chamber, an air exhaust fan and a fan power supply are further arranged in the filter bottle, the air exhaust fan is used for pumping the air entering from the air inlet hole and filtered to the air inlet chamber, and the conveying pipe is connected to the air inlet chamber of the filter bottle.

Furthermore, a partition layer is further arranged in the filter bottle, the partition layer divides the filter bottle into an independent exhaust part and a filter part, the exhalation hole is connected with the exhaust part through an exhaust pipe, and the exhaust part is provided with an air outlet hole.

Further, the face shield includes a head portion, a mask portion, and a neck portion.

The utility model discloses a protective device through air input/output and pipeline design, forms the circulation of gas in the protective equipment, makes and obtains sufficient fresh air in the protective equipment to keep air drying, clean, be suitable for all kinds of crowds.

The utility model has the advantages that:

(1) realize high-efficient protection: the utility model discloses a filter equipment, protective device, through inlet port, filtration copper mesh, filter layer, porous active carbon interlayer, the combination is together the utility model discloses realize the core subassembly of filter capacity, can realize non-oily filter particle 95% -99.99% filtration efficiency, show the promotion safety in utilization.

(2) The multi-use reduces use cost, reduces environmental pollution: inlet port, filter copper mesh, filter layer, porous active carbon interlayer carry out sealing connection through supporting backing ring and threaded washer between, the middle space that remains simultaneously makes this four bibliographic categories divide and can dismantle alone. The combination of the four parts can sequentially block and filter impurities of millimeter level, micron level and hundreds of nanometers from outside to inside. And, another big advantage of this kind of arranging is that if there is impurity to plug up above-mentioned filtration when using, can follow from outside to interior dismantlement in proper order, to the inlet port, filter the copper mesh, clear up or change the filter layer. The air inlet and the filtering copper net component can be cleaned and used for a plurality of times without influencing the filtering efficiency. The design greatly reduces the replacement frequency of the filter layer and obviously prolongs the service life of the filter layer. Moreover, the utility model discloses a filter layer materials are few, simple structure, and the recycle of being convenient for can show the secondary pollution who reduces the environment.

(3) The problem of breathing unsmooth in the high-efficient protection is solved: the utility model discloses with facial protective equipment and filter equipment through breathing in, exhale the pipe connection, can be through the adjusting fan rotational speed, change the speed and the power of bleeding, and then adjust the airflow and the velocity of flow that get into the gas bomb direction, adopt the gas bomb to store the air after filtering, can supply with breath constantly to form the air current circulation and discharge the external world, when can solving general facial protective equipment filtered air, filtration efficiency is higher, and the airflow is lower more and then lead to breathing the problem of difficulty.

(4) The method is applied to various occasions: the utility model discloses a design, the problem of uncomfortable when having solved and wearing facial protective equipment or gauze mask has solved the problem that people carry out the air of social activity exhalation and contact each other, can guarantee people at the respiratory security under multiple environment such as business trip travel, safety inspection, community protection, public transport.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope defined in the present application.

Fig. 1 is a schematic view of the filtering device and the protecting device according to the present invention.

According to an aspect of the utility model, the utility model provides a filter equipment for coronavirus personal protection, it mainly realizes the purification filtration of outside air through filter flask 11. Wherein the air inlet holes 11 are distributed at the bottom of the filter flask 11 and are used for allowing the outside air to enter. The filtering copper net 14, the filtering layer 15 and the first porous activated carbon interlayer 16 are sequentially arranged in the filtering bottle 11 at intervals.

The filtering copper net 14 is used for filtering impurities such as micro-dust, fine particles, water drops and the like in the air and has a long-term sterilization effect;

the filter layer 15 is mainly used for filtering fine impurities in the air, such as droplets, gel particles, dust particles and the like which may contain harmful substances such as viruses. The filtering layer 15 is divided into a plurality of layers, and the filtering pore diameters of the filtering layers are sequentially reduced;

the first porous activated carbon barrier layer 16 is used to keep the air in the filter flask 11 dry and fresh.

Preferably, the filtering copper net 14 of the present invention refers to a copper net with a pore size of 100-300 microns and a thickness of 50-500 microns, which can be processed by a copper strip or woven by a fine wire, and the material of the filtering copper net 14 is copper or copper alloy such as pure copper, red copper, oxygen-free copper, copper-silver alloy, etc.

Preferably, the filtering layer 15 of the present invention is divided into 3 to 5 layers, from outside to inside, 1 to 2 spunbond layers, 1 meltblown layer, and 1 to 2 spunbond layers. The spun-bonded layer is a non-woven fabric filter layer consisting of polypropylene PP material fibers with the diameter of 10-20 microns. The melt-blown layer is a melt-blown cloth filter layer consisting of polypropylene PP material fibers with the diameter of 0.5-10 microns, and the gram weight of the melt-blown cloth in the specification range is 20-100 g.

The utility model discloses in inlet port 13, filtration copper mesh 14, filter layer 15, first porous active carbon interlayer 16, the combination is together the utility model discloses realize the core subassembly of filter capacity, can realize non-oily filter particle 955-99.99% filtration efficiency, show promotion safety in utilization.

Preferably, inlet port 13, filtration copper mesh 14, filter layer 15, first porous active carbon interlayer 16 between, carry out sealing connection through support backing ring and screw gasket, the space remains in the middle of simultaneously, make this four bibliographic categories divide can interval distribution and can dismantle alone. The combination of the four parts can sequentially block and filter impurities of millimeter level, micron level and hundreds of nanometers from outside to inside. Moreover, another advantage of this arrangement is that if the filter structure is blocked by impurities during use, the filter structure can be sequentially removed from outside to inside to clean the air inlet 13 and the filtering copper mesh 14 or replace the filtering layer 15. The air inlet 13 and the filtering copper net 14 assembly can be cleaned and used for a plurality of times without influencing the filtering efficiency. The design greatly reduces the replacement frequency of the filter layer 15 and obviously prolongs the service life of the filter layer.

Inlet port 13, filter copper mesh 14, after using a period, can adopt ultraviolet irradiation, come the soda, alcohol more than 75%, 0.1% peracetic acid or 1% gram Liaolin wash, carry out repeated repetitious usage. The filter layer 15 may be irradiated with ultraviolet rays and used several times. The first porous activated carbon barrier layer 16 may be cleaned with more than 75% alcohol or irradiated with ultraviolet light for multiple uses.

As shown in fig. 1, according to another aspect of the present invention, there is also provided a protective device including a face guard, a gas cylinder 9, and a filter device.

The face protector mainly comprises a head part 1, a face mask part 2, an air suction hole 3, an air exhaust hole 4 and a neck part 5.

The head part 1 is a face guard for covering the head and the hindbrain, and the head part of the guard of the present invention is made of a light plastic or a polymer material which can be integrally formed by additive manufacturing, injection molding, or die molding.

The mask portion 2 refers to a protector portion for covering the face.

The air suction hole 3 refers to an air suction hole at a position near the corresponding nostril of the face protector and is connected with an air suction pipeline.

The exhalation port 4 refers to an exhalation port below the corresponding nostril of the face protector and is connected with an exhalation pipeline.

The neck portion 5 refers to a portion of the face guard which contacts the neck, and an elastic fabric is used for supporting and closing a gap between the guard and the neck.

The utility model discloses a gas bomb 9 is used for storing the sealed container of filtered air to it has sufficient air to be used for breathing in the facial protective equipment to guarantee, makes and breathes smoothly, sets up second porous activated carbon interlayer 8 in the gas bomb 9, is used for making the air among the gas bomb 9 keep dry fresh.

The utility model discloses a connect through breathing pipe 6 between gas bomb 9 and the suction hole 3, breathing pipe 6 is used for carrying the fresh air that has filtered in to the protective equipment, adopts sealed wear-resisting flexible conduit, connects through conveyer pipe 12 between gas bomb 9 and the filter flask 11, and conveyer pipe 12 is used for inputting the air after will filtering to gas bomb 9.

The utility model discloses a still be provided with air inlet chamber 19 in the filter flask 11, wherein air inlet chamber 19 is the closed cavity of infundibulate shape for collect the air that air exhaust fan 18 blew off, and carry to gas bomb 9 through conveyer pipe 12. A fan power supply 17 and an extraction fan 18 are arranged between the air inlet chamber 19 and the air inlet 13, the fan power supply 17 is used for providing energy for the extraction fan 18, and the extraction fan 18 comprises a main shaft, fan blades and a supporting member and is used for forcibly blowing filtered air into the air inlet chamber 19 through the rotation of the fan so as to improve the efficiency of air filtering. The upper part of the air inlet chamber 19 is provided with a blocking layer 21, the blocking layer 21 can isolate an air exhaust part and a filtering part, the air exhaust part is provided with air outlet holes 22 for exhausting exhaled air, and the air exhaust part is connected with the exhalation holes 4 through an exhaust pipe 24.

Simultaneously in order to guarantee the air flow direction, the utility model discloses at breathing pipe 6, conveyer pipe 12, set up corresponding first check valve 7 on the blast pipe 24, second check valve 10, third check valve 20, fourth check valve 23, first check valve 7 guarantees that filtered air only flows to face protective equipment direction from gas bomb 9, second check valve 10 makes filtered air can only follow filter flask 11 and get into gas bomb 9 through conveyer pipe 12, third check valve 20 makes filtered air only can get into conveyer pipe 12 through air inlet chamber 19, fourth check valve 23 makes the air of exhalation get into 11 upper portion confined exhaust region of filter flask through blast pipe 24.

The utility model discloses a protective device its use step and effect are as follows:

(1) firstly, the outside air enters the filter bottle 11 through the air inlet 13, and then the filter copper mesh 14 absorbs impurities such as micro-dust, fine particles, water drops and the like with the particle size of more than 100 microns in the air, and the effect of long-term sterilization is achieved.

(2) Then, the air passes through the filter layer 15, and in the 3-5 layer structure of the filter layer 15 from outside to inside, the impurities such as 0.1-100 micron-sized micro dust, aerosol particles, spray and the like in the air are sequentially filtered to obtain clean air.

(3) The filtered clean air passes through the first porous activated carbon interlayer 16, and residual water molecules and other small molecules in the air are adsorbed and cleaned, so that the air is fresh and dry.

(4) Fresh and dry air is drawn into the air intake chamber 19 by the action of the fan power supply 17 and the suction fan 18. In the inlet chamber 19 the flow is collected through a third one-way valve 20 which ensures that air can only flow in one direction into the transfer pipe 12 and then through the second one-way valve 10 into the gas cylinder 9.

(5) The air is kept pure and dry in the gas storage bottle 9 by the second porous activated carbon interlayer 8, and fresh air is provided for the wearer by the air suction holes 3 positioned above the nostrils of the facial protector through the delivery of the first one-way valve 7 and the air suction pipe 6.

(6) After the wearer breathes in fresh air and exhales, the exhaled air is downwards ejected from the nostrils, passes through the exhalation holes 4 below the nostrils, is conveyed by the exhaust pipe 24, is exhausted into the space above the filter bottle 11 through the fourth one-way valve 23, and is exhausted outside through the air outlet 22.

This protective apparatus separately arranges facial protective equipment, filter equipment, gas bomb 9, exhaust, links to each other the suction hole 3 on gas bomb 9 and the facial protective equipment through breathing pipe 6, links to each other through blast pipe 24, the one-way pneumatic valve 23 of fourth and the expiratory hole 4 on the facial protective equipment, makes the safe and fresh air after the filtration flow at facial protective equipment inner loop under the effect of air pump, makes the people can smoothly breathe always.

Fan power supply 17, air exhaust fan 18, can change the speed and the power of bleeding through adjusting the fan rotational speed, and then adjust the airflow and the velocity of flow that get into the 9 directions of gas bomb.

The utility model discloses an air after the gas bomb 9 stores the filtration, when can solving general face guard filtered air, filtration efficiency is higher, and the air flow is lower more and then lead to the problem of breathing difficulty.

The utility model discloses a fan power supply 17, air exhaust fan 18 can pump the air after filtering to gas bomb 9, make atmospheric pressure wherein rise gradually to because the air in the gas bomb 9 can only be carried to intake pipe 6 through first check valve 7, consequently can produce the circulation transport to in the face protective equipment. And, through inspiration port 3, human body, exhaling hole 4 and blast pipe 34, form a gas circulation, ensure the smooth and easy of breathing process, avoid the people to feel the oppression in the protective equipment.

To the utility model provides a filter equipment and protective device, the utility model provides a following embodiment.

Embodiment mode 1: non-oily filter particles protective device with 95% filter efficiency.

(1) According to the utility model discloses a schematic diagram 1 adopts transparent plastic layer and the ordinary plastics that can contact the human body, as face guard's face guard part 2 and head 1 respectively.

(2) Firstly, the outside air enters the filter bottle 11 through the air inlet, and then the impurities such as micro-dust, fine particles, water drops and the like with the particle size of more than 100 microns in the air are adsorbed by the filtering copper net 14, and the effect of long-term sterilization is achieved.

(3) The filter copper mesh 14 is a copper mesh with a pore size of 150 microns and a thickness of 100 microns.

(4) The filtering layer 15 is composed of 1 spunbond layer, 1 meltblown layer and 1 spunbond layer from outside to inside. The spun-bonded layer is a non-woven fabric filter layer consisting of polypropylene PP material fibers with the diameter of 10-20 microns. The melt-blown layer is a melt-blown cloth filter layer consisting of polypropylene PP material fibers with the diameter of 0.5-10 microns, and the specification of the melt-blown cloth is 40g in gram weight.

(5) Then, the air passes through the filter layer 15, and in the 3-layer structure of the filter layer 15 from outside to inside, the non-oily impurities such as 0.1-100 micron-sized micro-dust, aerosol particles, spray and the like in the air are sequentially filtered to obtain clean air, so that the filtering efficiency of the non-oily filter particles is realized by 95%.

(6) The filtered clean air passes through the first porous activated carbon interlayer 16, and residual water molecules and other small molecules in the air are adsorbed and cleaned, so that the air is fresh and dry.

(7) Fresh and dry air is drawn into the air intake chamber 19 by the action of the fan power supply 17 and the suction fan 18. In the inlet chamber 19 the flow is collected through a third one-way valve 20 which ensures that air can only flow in one direction into the transfer pipe 12 and then through the second one-way valve 10 into the gas cylinder 9.

(8) The air is kept pure and dry in the gas storage bottle 9 by the second porous activated carbon interlayer 8, and fresh air is provided for the wearer by the air suction holes 3 positioned above the nostrils of the facial protector through the delivery of the first one-way valve 7 and the air suction pipe 6.

(9) After the wearer breathes in fresh air and exhales, the exhaled air is downwards ejected from the nostrils, passes through the exhalation holes 4 below the nostrils, is conveyed by the exhaust pipe 24, is exhausted into the space above the filter bottle 11 through the fourth one-way valve 23, and is exhausted outside through the air outlet 22.

After the filter is used for 4 hours, the filter copper net 14 and the air inlet 13 can be repeatedly used only by irradiating the filter layer with ultraviolet rays and cleaning the filter copper net 14 and the air inlet 13 by using lewis water, alcohol with the concentration of over 75 percent, peroxyacetic acid with the concentration of 0.1 percent or Keliaolin with the concentration of 1 percent, and the filtering effect is not influenced.

Embodiment mode 2: a protective device with 99% filtering efficiency of non-oily filtering particles.

(3) The filtering copper mesh 14 is a copper mesh with a pore size of 120 microns and a thickness of 100 microns.

(4) The filtering layer 15 is composed of 2 spunbond layers, 1 meltblown layer and 2 spunbond layers from outside to inside. The spun-bonded layer is a non-woven fabric filter layer 15 consisting of polypropylene PP material fibers with the diameter of 10-20 microns. The melt-blown layer is a melt-blown cloth filter layer 15 composed of polypropylene PP material fibers with the diameter of 0.5-10 microns, and the specification of the melt-blown cloth is 50g in gram weight.

(5) Then, the air passes through the filter layer 15, and in the 3-layer structure of the filter layer 15 from outside to inside, the non-oily impurities such as 0.1-100 micron-sized micro-dust, aerosol particles, spray and the like in the air are sequentially filtered to obtain clean air, so that the filtering efficiency of the non-oily filter particles is realized by 99%.

After the filter is used for 4 hours, the filter layer 15 is irradiated by ultraviolet rays, and the filter copper net 14 and the air inlet hole part are cleaned by using the tempering water, the alcohol with the concentration of over 75 percent, the peroxyacetic acid with the concentration of 0.1 percent or the Keliaogin with the concentration of 1 percent, so that the filter can be repeatedly used without influencing the filtering effect.

Embodiment mode 3: a protective device with 99% filtering efficiency of non-oily filtering particles.

(3) The filter copper mesh 14 is a copper mesh with a pore size of 150 microns and a thickness of 120 microns.

(4) The filtering layer 15 is composed of 2 spunbond layers, 1 meltblown layer and 2 spunbond layers from outside to inside. The spun-bonded layer is a non-woven fabric filter layer 15 consisting of polypropylene PP material fibers with the diameter of 10-15 microns. The melt-blown layer is a melt-blown cloth filter layer 15 composed of polypropylene PP material fibers with the diameter of 0.5-5 microns, and the specification of the melt-blown cloth is 50g in gram weight.

Embodiment 4: a guard with 99.99% filtration efficiency of non-oily filter particles.

(3) The filtering copper mesh 14 is a copper mesh with a pore size of 100 microns and a thickness of 120 microns.

(4) The filtering layer 15 is composed of 2 spunbond layers, 1 meltblown layer and 2 spunbond layers from outside to inside. The spun-bonded layer is a non-woven fabric filter layer 15 consisting of polypropylene PP material fibers with the diameter of 10-15 microns. The melt-blown layer is a melt-blown cloth filter layer 15 composed of polypropylene PP material fibers with the diameter of 0.5-5 microns, and the specification of the melt-blown cloth is that the gram weight is 60 g.

(5) Then, the air passes through the filter layer 15, and in the 3-layer structure of the filter layer 15 from outside to inside, the non-oily impurities such as 0.1-100 micron-sized micro-dust, aerosol particles, spray and the like in the air are sequentially filtered to obtain clean air, so that the filtering efficiency of the non-oily filter particles is realized to be 99.99%.

(9) After the wearer breathes in fresh air and exhales, the exhaled air is downwards ejected from the nostrils, passes through the exhalation holes 4 below the nostrils, is conveyed by the exhaust pipe 12, is exhausted into the space above the filter bottle 11 through the fourth one-way valve 23, and is exhausted outside through the air outlet 22.

After the filter is used for 4 hours, the same filter layer 15 is only needed to be replaced, and the filtering copper net 14 and the air inlet hole part are cleaned by using the tempering water, the alcohol with the concentration of over 75 percent, the peroxyacetic acid with the concentration of 0.1 percent or the Keliaogin with the concentration of 1 percent, so that the filter can be repeatedly used without influencing the filtering effect.

Claims

1. A filter device for personal protection against coronaviruses, comprising: the filter comprises a filter bottle, an air inlet arranged on the filter bottle, a filtering copper net, a filtering layer and a first porous activated carbon interlayer which are sequentially arranged in the filter bottle along the airflow flowing direction;

the air inlet hole, the filtering copper net, the filtering layer and the first porous activated carbon interlayer can sequentially block and filter millimeter-level, micron-level and nanometer-level impurities from outside to inside.

2. The filter device for personal protection against coronavirus according to claim 1, wherein the filtering copper net is a copper net with a pore size of 100-300 microns and a thickness of 50-500 microns.

3. The filtration device of claim 1, wherein the filtration layer comprises 3-5 layers, from outside to inside, comprising 1-2 layers of spun-bonded layer, 1 layer of melt-blown layer, and 1-2 layers of spun-bonded layer.

4. The filter device of claim 3, wherein the spun-bonded layer is a non-woven filter layer comprising polypropylene PP material fibers with a diameter of 10-20 microns, and the melt-blown layer is a melt-blown filter layer comprising polypropylene PP material fibers with a diameter of 0.5-10 microns.

5. The filter device for personal protection against coronavirus according to claim 1, wherein the filter copper mesh, the filter layer and the first porous activated carbon barrier are sequentially arranged at intervals in the filter flask and are separately detachable.

6. A protective device comprising a face guard, a gas cylinder, and the filter device according to any one of claims 1 to 5;

7. The guard according to claim 6, wherein a second porous activated carbon barrier is provided within the cylinder.

8. The protective apparatus according to claim 6, wherein an air inlet chamber, an air exhaust fan and a fan power supply are further provided in the filter flask, the air exhaust fan is used for pumping the air which enters from the air inlet hole and is filtered to the air inlet chamber, and the delivery pipe is connected at the air inlet chamber of the filter flask.

9. The protector according to claim 6, wherein a partition layer is further arranged in the filter flask, the partition layer divides the filter flask into an exhaust part and a filtering part which are independent, the exhaust part is connected with the exhalation port through an exhaust pipe, and the exhaust part is provided with an air outlet.

10. The protective apparatus of claim 6 wherein the face shield includes a head portion, a mask portion and a neck portion.