CN105688350B

CN105688350B - Air filter for nose

Info

Publication number: CN105688350B
Application number: CN201610177262.4A
Authority: CN
Inventors: 林叶承; 林焕东; 甘鹊宁; 陈碧滔; 林子文
Original assignee: Guangzhou Tianyuan Silicone Machine Technology Co ltd
Current assignee: Guangzhou Tianyuan Silicone Machine Technology Co ltd
Priority date: 2016-03-24
Filing date: 2016-03-24
Publication date: 2021-05-07
Anticipated expiration: 2036-03-24
Also published as: CN105688350A

Abstract

The invention discloses a nasal air filter, which comprises a body made of soft materials, wherein an air inlet is formed in the front end of the body, a nose mask area for covering an external nose is formed in the rear end of the body, a primary filter piece and a secondary filter piece are sequentially arranged on an air inlet flow passage from the air inlet to the nose mask area, and an air buffer cavity is formed between the primary filter piece and the secondary filter piece. The primary filter piece filters most pollutants, dust and the like in the air, the secondary filter piece filters the air for the second time to remove the residual pollutants after the primary filter, so that the air entering the nose mask area is cleaner and fresher, and the air buffer cavity can buffer the air entering from the outside and the air exhaled from the inside in the process of entering and exiting, so that the breathing feeling of people can be more gentle and comfortable when the nose mask is worn. The invention can be applied to filtering air inhaled into the human body.

Description

Air filter for nose

Technical Field

The invention relates to the field of filters, in particular to a nasal air filter.

Background

At present, air pollution in cities is more serious, and particularly dust particles and bacteria in the air seriously affect the health of people; and some production sites with large dust also need to wear proper protective equipment. For this reason, more and more people use nose masks and mouth masks to cope with the above situation. Most common mouth masks and nose masks in the market are of single-layer filtering structures, and only one layer of filter membrane (net) or active carbon is used for adsorption, so that the filtering capacity of the mouth mask is relatively deficient; or two or more layers of filter membranes are stacked, although the filtering capacity is improved, the filter membrane brings unsmooth breathing feeling to people.

Disclosure of Invention

In order to solve the above problems, an object of the present invention is to provide a nasal air filter having a superior filtering effect and a smooth breathing effect.

The technical scheme adopted by the invention is as follows:

the utility model provides an air filter for nose, includes the body of making by soft materials, the front end of body is equipped with the inlet port, and the rear end of body is equipped with and is used for covering the nose cup district that closes outer nose, follows the inlet port is equipped with one-level in proper order to filter piece and second grade on the inlet flow of nose cup district and filters the piece, one-level filters and has the air cushion chamber between the piece with second grade filtration.

As a further improvement of the invention, an airflow homogenizing structure is arranged in the air inlet flow channel and is positioned in front of the secondary filter element.

As a further improvement of the invention, the number of the air inlet holes is at least two, and the tangential directions of the outlets of the air inlet holes are intersected or staggered, so that the air flow homogenizing structure is formed among the air inlet holes.

As a further improvement of the invention, the airflow homogenizing structure comprises a plurality of blocking pieces arranged in the air inlet flow passage, and a plurality of uniform flow passages are arranged among the blocking pieces or between the adjacent blocking pieces.

As a further development of the invention, the flow area of the secondary filter element is greater than the flow area of the primary filter element.

As a further improvement of the invention, the primary filter element is detachably connected to the body and comprises an annular framework clamped on the peripheral wall of the air inlet hole and a filter membrane covering the annular framework.

As a further improvement of the invention, an air outlet hole which is communicated with the air buffer cavity and the nose mask area is arranged in the body, and the secondary filter piece is detachably arranged in the air outlet hole.

As a further improvement of the invention, the secondary filter element comprises an annular framework clamped on the peripheral wall of the air outlet hole and a filter membrane covering the annular framework of the air outlet hole.

As a further improvement of the invention, the edge of the nose mask area is provided with an elastic sheet for adhering to the skin of a human body, and the elastic sheet is provided with an arc part protruding towards the skin.

As a further improvement of the invention, wearing bands are respectively arranged on two sides of the body, an ear loop is arranged at the tail end of each wearing band, and the connecting part of the ear loop and the wearing bands is of an outward-turning structure.

The invention has the beneficial effects that: the primary filter piece filters most pollutants, dust and the like in the air, the secondary filter piece filters the air for the second time to remove the residual pollutants after the primary filter, so that the air entering the nose mask area is cleaner and fresher, and the air buffer cavity can buffer the air entering from the outside and the air exhaled from the inside in the process of entering and exiting, so that the breathing feeling of people can be more gentle and comfortable when the nose mask is worn.

Drawings

The invention is further described with reference to the following figures and embodiments.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of the housing and the internal structure of the housing;

FIG. 3 is a schematic view of a primary filter element;

FIG. 4 is a schematic cross-sectional view of a primary filter element;

FIG. 5 is a schematic structural view of the secondary filter element;

FIG. 6 is a schematic cross-sectional view of a secondary filter element;

FIG. 7 is a schematic diagram of the use of the present invention;

fig. 8 is an intake air flow diagram of air in one embodiment.

Detailed Description

The nasal air filter shown in fig. 1 and 2 includes a housing 100 made of a soft material, the housing 100 constituting a body of the filter. The front end of shell 100 is equipped with inlet port 1, and the rear end of shell 100 is equipped with and is used for covering the nose cup district 2 that closes outer nose, is equipped with one-level filter piece and second grade filter piece along inlet port 1 to the inlet flow way in nose cup district 2 in proper order, and one-level filter piece and second grade filter and have air cushion chamber 3 between the piece.

The shell 100 in the embodiment is made of silica gel or other soft materials, the soft materials can be better attached to the face structure of a human body through the deformation of the soft materials, the wearing of the human body is more comfortable, better sealing effect can be achieved when the soft materials are attached to the skin, the nose of the human body and the outside air can generate better isolation effect, and therefore the filtering effect of the filter can be better. Nose mask district 2 is used for covering and closes outer nose, direct and human skin contact promptly, for this reason, nose mask district 2 adopts bionics with the people's face contact surface to design, the curve structural design of imitation people's face, make the filter can be more comprehensive when wearing attached to on people's face, thereby form an inclosed space in inside, nose mask district 2 is separated nose and outside air, only can get into nose mask district 2 through the air that filters, just so can realize fine filtration's function.

The embodiment has the filtration of two-stage, and the one-level filters most pollutants of filtering the air, dust etc. and the second grade filters the filtration that carries out the second time, filters and gets rid of remaining pollutant behind the one-level filtration for the air that enters into nose cup district 2 is cleaner more fresh.

In this embodiment, an air buffer chamber 3 is further arranged between the two-stage filtering structures, the air buffer chamber 3 is an independent closed space, the front end of the air buffer chamber is communicated with the outside through an air inlet 1, the rear end of the air buffer chamber is communicated with the nose mask area 2 through a secondary filtering piece, the air buffer chamber 3 can enable air sucked from the air inlet 1 and air exhaled from the nose mask area 2 to play a role in buffering in the process of entering and exiting, and the breathing feeling of people can be more moderate and comfortable when the nose mask is worn.

Further preferably, an airflow homogenizing structure is arranged in the air inlet flow channel and is positioned in front of the secondary filter piece. The air current homogenizes the structure and can make the air in air cushion chamber 3 abundant homogenize and scatter uniformly to do benefit to the secondary filter of air more.

One of the airflow homogenizing structures may be formed in the air intake hole 1. Specifically, referring to fig. 8, there are two air intake holes 1, and the tangential directions of the outlets of the air intake holes 1 intersect or intersect. For example, the air inlet holes 1 are circular holes, and the tangential direction of the outlets of the circular holes is substantially the axis of the circular holes, so that the air can collide with each other when being sucked into the air buffer cavity 3 from the two air inlet holes 1, and then the two air flows are stirred and disturbed, and then are uniformly diffused into the whole air buffer cavity 3 instead of directly reaching the mask area 2 after passing through the air inlet holes 1. In the embodiment, only two air inlet holes 1 are described, but of course, there may be a plurality of air inlet holes 1.

Another gas flow homogenizing structure may be barriers disposed in the inlet flow passage, such as transverse ribs, as shown in fig. 2, or structures that block the flow of gas. The barriers are provided with a plurality of uniform flow passages per se or between adjacent barriers. The air flow is blocked by the blocking piece when passing through the air flow, the flow speed is reduced, and then the air flow is divided into two or more air flow passages, so that the air flow is uniformly stirred and diffused by the blocking piece.

Above-mentioned two kinds of air current homogenize the structure and can exist alone, perhaps combine the use, and its purpose not only is not limited to and homogenizes the air current, but also can the diffusion air current, makes remaining particle pollutant equipartition in the air buffer chamber 3 in the air current, and then provides the condition for utilizing second grade filter more fully.

Further preferably, the flow area of the secondary filter element is larger than the flow area of the primary filter element. By the structure, the air flow of the air inhaled and exhaled from the nose mask area 2 by a person in the breathing process can reach a larger state, so that the breathing is smoother; furthermore, the airflow can have larger contact area with the secondary filter element after being stirred and diffused, and the filtering effect is better.

Further preferably, and with reference to fig. 2, the primary filter element is removably attached to the housing 100 for easy replacement for better air filtration quality. In particular, with further reference to fig. 3 and 4, the primary filter element comprises an annular frame 11 and a filter membrane 12 covering the annular frame 11. The annular framework 11 is made of a material with high hardness, an annular clamping groove 13 is arranged on the periphery edge of the annular framework, and the annular clamping groove 13 is clamped on the peripheral wall of the air inlet hole 1. Since the housing 100 is made of soft material and can deform under the action of external force, it can be easily inserted into the annular frame 11 only by changing the aperture of the air inlet hole 1. The annular framework 11 can play a supporting role, so that the filtering membrane 12 is kept in a flat state after being installed, and the filtering membrane 12 can play a better filtering role.

The above-mentioned barriers may be in the form of ribs 14 arranged directly on the annular frame 11, between which ribs uniform flow channels 15 are formed.

Further preferably, referring to fig. 2, an air outlet 4 is provided in the housing 100 for communicating the air buffer chamber 3 with the nasal cavity 2, and the secondary filter is detachably disposed in the air outlet 4 for easy replacement to obtain better air filtering quality. The aperture of the air outlet 4 is larger than that of the air inlet 1.

With further reference to fig. 5 and 6, the secondary filter element comprises an annular frame 41 in the form of a hollow triangle and a filter membrane 42 covering the annular frame 41. The annular frame 41 is made of a material with high hardness, an annular clamping groove 43 is arranged on the periphery edge of the annular frame, and the annular clamping groove 43 is clamped on the peripheral wall of the air outlet 4. Since the housing 100 is made of soft material and can deform under the action of external force, it can be easily inserted into the annular frame 41 only by changing the aperture of the air outlet 4.

Further preferably, as shown in fig. 2, an elastic sheet 5 for attaching to the skin of a human body is provided at the edge of the nose mask region 2, and the elastic sheet 5 has an arc-shaped portion 51 protruding toward the skin. When the elastic sheet 5 contacts with the skin, the protruding arc part 51 contacts with the skin first and then is recessed inwards according to the shape of the skin, so that the elastic sheet 5 contacts with the skin in a surface contact manner instead of a line contact manner, on one hand, the sealing performance is enhanced, on the other hand, the contact area of the shell 100 and the skin is increased, the supporting force of muscles is reduced, the indentation is avoided, and the comfortable feeling of a wearer is better.

Further preferably, as shown in fig. 1, the wearing bands 6 are respectively disposed on two sides of the casing 100, and are made of a soft silicone material or other soft materials, and have a sheet belt structure. An ear ferrule 7 is provided at the end of each wearing band 6 for fitting over the ear to secure the nose mask. The ear loop 7 is also in the form of a strip made of silicone or other soft material. The connecting part 71 of the ear loop 7 and the wearing band 6 is of an outward turning structure, that is, referring to fig. 1, when the ear loop 7 is unfolded, the tangential direction of the connecting part forms an angle with the plane of the wearing band 6, so as to form a smooth transition of outward turning, thus the contact area of the connecting part and the skin of the human face is a plane, thereby increasing the contact area and reducing the pressure, and meanwhile, the contact area of the ear loop 7 and the skin on the back of the ear is also a plane, and finally the wearing is more comfortable.

The principle of use of the present invention is shown in fig. 7, air is sucked from the air inlet 1 and filtered for the first time by the filter membrane 12, most of the contaminants, dust, etc. of the air are filtered; the air is buffered in the air buffer chamber 3 and then flows through the filter membrane 42 for secondary filtration, and clean air flows out of the air outlet 4.

The above description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention.

Claims

1. A nasal air filter characterized by: the nose filter comprises a body made of soft materials, wherein an air inlet (1) is arranged at the front end of the body, a nose cover area (2) for covering an external nose is arranged at the rear end of the body, a primary filter element and a secondary filter element are sequentially arranged along an air inlet flow passage from the air inlet (1) to the nose cover area (2), and an air buffer cavity (3) is arranged between the primary filter element and the secondary filter element; an airflow homogenizing structure is arranged in the air inlet flow channel and is positioned in front of the secondary filter piece;

the number of the air inlets (1) is at least two, and the tangential directions of the outlets of the air inlets (1) are intersected or staggered, so that the air flow homogenizing structure is formed among the air inlets (1);

the airflow homogenizing structure comprises a plurality of blocking pieces arranged in the air inlet flow channel, and a plurality of uniform flow channels are arranged among the blocking pieces or between the adjacent blocking pieces;

the flow area of the secondary filter member is larger than that of the primary filter member.

2. The nasal air filter of claim 1, wherein: the one-level filters and connects on the body dismantled and assembled, the one-level filters the piece including the joint at the annular skeleton of inlet port (1) perisporium and cover the filtration membrane on annular skeleton.

3. The nasal air filter of claim 1, wherein: this internal venthole (4) that are equipped with intercommunication air cushion chamber (3) and nose cover district (2), the second grade filters and sets up in venthole (4) dismantled and assembled.

4. A nasal air filter according to claim 3, wherein: the secondary filtering piece comprises an annular framework clamped on the peripheral wall of the air outlet hole (4) and a filtering membrane covering the annular framework of the air outlet hole (4).

5. The nasal air filter of claim 1, wherein: the edge of the nose mask area (2) is provided with an elastic sheet (5) used for being attached to the skin of a human body, and the elastic sheet (5) is provided with an arc-shaped part (51) protruding towards the skin.

6. The nasal air filter of claim 1, wherein: the both sides of body are equipped with respectively and wear bandage (6), each the end of wearing bandage (6) is equipped with ear's lasso (7), ear's lasso (7) and the connecting portion of wearing bandage (6) are the formula structure of turning up.