Mask filter and mask

Abstract

The invention is applicable to the field of masks, and discloses a mask filter and a mask. The mask comprises a mask body and a mask filter, the mask filter comprises a porous membrane and an internally hollow shell, the shell is provided with a slot and an air inlet, the porous membrane is mounted on the shell and covers the slot, the porous membrane and the shell are enclosed to form a filter cavity, the filter cavity is used to fill the filter liquid, a plurality of protrusions are convexly provided on the surface side of the porous membrane facing the filter cavity, and a plurality of air holes are penetrated through the porous membrane, the protrusions and the air holes are staggered, the surface side of the porous membrane facing the filter cavity, the surface of the protrusions and the surface of the air holes are all subjected to super-hydrophobic treatment, the air inlet is communicated with the filter cavity, and the mask filter is provided, so the mask has a better filtering effect, and the filtered air has a certain humidity, thereby avoiding the phenomenon that the user feels uncomfortable due to long-term use of the mask.

Description

Technical Field

[0001] The present invention relates to the technical field of masks, and in particular to a mask filter and a mask. Background Art

[0002] In order to deal with air quality problems and viral infectious diseases, people often need to wear masks to protect themselves in medical work and daily life.

[0003] Traditional masks achieve their filtering function through technologies such as electrostatic adsorption, but these technologies are relatively simple and difficult to achieve multifunctionality. Summary of the invention

[0004] The first object of the present invention is to provide a mask filter that can supply filtered gas with a certain humidity to the human body.

[0005] To achieve the above object, the solution provided by the present invention is:

[0006] A mask filter comprises a porous membrane and a shell with a hollow interior, wherein the shell is provided with a slot and an air inlet, the porous membrane is mounted on the shell and covers the slot, the porous membrane and the shell are combined to form a filter cavity, the filter cavity is used to fill filtered liquid, a plurality of protrusions are convexly provided on the surface side of the porous membrane facing the filter cavity, and a plurality of air holes are penetrated through the porous membrane, the protrusions and the air holes are staggered, the surface side of the porous membrane facing the filter cavity, the surface of the protrusions and the surface of the air holes are all subjected to super-hydrophobic treatment, and the air inlet of the shell is connected to the filter cavity.

[0007] Preferably, a slot communicating with the filter cavity is formed in a recessed manner on the inner side wall of the shell, the slot is adapted to the porous membrane, and the porous membrane is inserted into the slot.

[0008] Preferably, the air inlet is provided with a breathable and waterproof membrane.

[0009] Preferably, the surface side of the porous membrane facing the filter cavity, the surface of the protrusion and the surface of the air pores are all subjected to super-hydrophobic treatment as follows:

[0010] A super-hydrophobic material is sprayed on the surface of the porous membrane facing the filter cavity, the surface of the protrusion and the surface of the air pore.

[0011] Preferably, the surface side of the porous membrane facing the filter cavity, the surface of the protrusion and the surface of the air pores are all subjected to super-hydrophobic treatment, which comprises the following steps:

[0012] Nano zinc oxide is prepared on the surface of the porous membrane facing the filter cavity, the surface of the protrusions and the surface of the air holes;

[0013] The porous membrane is fluorinated to obtain a super-hydrophobic functional surface.

[0014] Preferably, the method for preparing the porous membrane comprises the following steps:

[0015] Step S11: preparing a counter template of the porous membrane, and printing the counter template of the porous membrane by 3D printing technology, wherein the surface of the counter template has a protrusion array and a micro-pit array, and the protrusion array and the micro-pit array are arranged alternately;

[0016] Step S12: Mixing silica gel and curing agent in a mass ratio of 1:1-20:1 and pouring them on the surface of the counter template, wherein the level of the silica gel does not exceed the height of the protrusion array;

[0017] Step S13: After the silica gel is solidified, the solidified silica gel is peeled off from the surface of the counter template to obtain a porous membrane with protrusions and air pores.

[0018] Furthermore, in step S11, the height of the protrusion array is 0.2-5 mm, and the diameter is 0.1-2 mm; the depth of the micro-pit array is 0.1-5 mm, and the diameter is 0.1-2 mm.

[0019] Furthermore, in step S13, the temperature during the curing of the silicone is maintained at 20-90° C., and the curing time is 0.5-24 hours.

[0020] The second object of the present invention is to provide a mask, comprising a mask body and a mask filter, wherein the mask body adopts the mask filter as described above, and the mask filter is fixed on the mask body.

[0021] Preferably, the shell is adhesively fixed to the middle part of the mask body.

[0022] The mask filter of the present invention realizes two functions of filtering and humidification, and can provide the user with purified air with a certain humidity.

[0023] Since the mask of the present invention is provided with a mask filter, the filtering effect is better, and the filtered air has a certain humidity, thereby avoiding the phenomenon that the user feels uncomfortable due to long-term use of the mask. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0025] Figure 1 is a schematic diagram of the structure of a mask provided by an embodiment of the present invention;

[0026] Figure 2 is a cross-sectional view of a mask filter provided by an embodiment of the present invention;

[0027] Figure 3 yes Figure 2 A magnified view of middle;

[0028] Figure 4 is a schematic diagram of the structure of a porous membrane provided by an embodiment of the present invention;

[0029] Figure 5 is a schematic structural diagram of a housing provided by an embodiment of the present invention;

[0030] Figure 6 It is a filtering principle diagram of the mask filter provided in an embodiment of the present invention.

[0031] Description of Figure Numbers:

[0032] 1. Mask; 10. Mask filter; 11. Porous membrane; 111. Raised portion; 112. Air vents; 12. Shell; 121. Air inlet; 122. Slot; 13. Filter cavity; 20. Mask body. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0035] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0036] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0037] like Figures 2 to 5 As shown, it is a mask filter 10 according to an embodiment of the present invention.

[0038] See also Figure 2-Figure 5 The mask filter 10 of the embodiment of the present invention includes a shell 12 with a hollow interior and a porous membrane 11, wherein one side of the shell 12 is provided with a groove, the porous membrane 11 is mounted on the shell 12 and covers the groove, the porous membrane 11 and the shell 12 enclose a filter chamber 13, the filter chamber 13 is filled with a filtered liquid, a plurality of protrusions 111 are convexly provided on the surface side of the porous membrane 11 facing the filter chamber 13, and a plurality of air holes 112 are provided through the porous membrane 11, the protrusions 111 and the air holes 112 are staggered, and the surface side of the porous membrane 11 facing the filter chamber 13, the surface of the protrusions 111 and the surface of the air holes 112 are all super-hydrophobic, which can prevent the filtered liquid from leaking from the filter chamber 13, and as Figure 6 As shown, due to the provision of the protrusion 111, the water flow can be lifted by the protrusion 111, and the filtered gas can pass through the gas layer between the liquid / solid and directly pass through the air vent 112. The filtered liquid can filter out solid particles in the air and purify the air, and since the mask filter 10 uses the filtered liquid to assist in filtering, the filtered gas has a certain humidity.

[0039] The shell 12 is provided with an air inlet 121 connected to the filter chamber 13. The air enters the filter chamber 13 through the air inlet 121 and is filtered by the filtered liquid before being supplied to the user. Since the gap between the porous membrane 11 and the shell 12 is very small, and the porous membrane 11 is treated with super-hydrophobicity, the filtered liquid will not leak out of the filter chamber 13 except for special circumstances.

[0040] Furthermore, in order to improve the sealing performance between the housing 12 and the porous membrane 11 , the air inlet 121 is provided with a breathable and waterproof membrane to prevent the filtered liquid in the filter cavity 13 from leaking out of the housing 12 through the air inlet 121 .

[0041] In this embodiment, the shell 12 is a cube with grooves on two sides, and the porous membrane 11 covers the groove on one side. During assembly, the porous membrane 11 is assembled first, and then the filtered liquid is filled into the gap between the porous membrane 11 and the shell 12. It is best to seal the porous membrane 11 and the shell 12, and the groove on the other side is used as the air inlet 121.

[0042] Of course, the housing 12 may also be configured in other shapes.

[0043] Preferably, the inner wall of the shell 12 is recessed to form a slot 122 connected to the filter chamber 13, and the slot 122 is adapted to the porous membrane 11, and the porous membrane 11 is inserted into the slot 122. Since the surface of the porous membrane 11 is super-hydrophobic, no additional sealing treatment is required, and the filtered liquid will not leak out of the shell 12 through the gap between the porous membrane 11 and the shell 12.

[0044] There are many ways to perform super-hydrophobic treatment on the surface of the porous membrane 11 facing the filter cavity 13, the surface of the protrusion 111 and the surface of the air hole 112. In the present embodiment, super-hydrophobic material can be sprayed, that is, the surface of the porous membrane 11 facing the filter cavity 13, the surface of the protrusion 111 and the surface of the air hole 112 are sprayed with super-hydrophobic material.

[0045] In other embodiments, nano zinc oxide may be prepared on the surface of the porous membrane 11 facing the filter cavity 13, the surface of the protrusion 111 and the surface of the air pore 112, and then fluorinated to obtain a super-hydrophobic functional surface.

[0046] Preferably, a plurality of protrusions 111 are arranged in an array, and a plurality of air holes 112 are arranged in an array.

[0047] Optionally, the protrusion 111 is cylindrical, with a height of 0.1-5 mm and a diameter of 0.1-2 mm. It is understandable that the protrusion 111 is not limited to a cylindrical shape, but may be in other shapes, such as a cone or a hemispherical shape.

[0048] Optionally, the air hole 112 is a circular hole. It can be understood that the air hole 112 is not limited to a circular hole, and can also be designed as a hole of other shapes, for example, it can be set to an elliptical hole, a semicircular hole, a fan-shaped hole, etc.

[0049] It should be noted that the filtered liquid can be water or a volatile drug liquid. If the filtered liquid is a volatile drug liquid, the function of sustained-release drug delivery can be achieved.

[0050] The mask filter 10 of the embodiment of the present invention realizes two functions of filtering and humidification, and can provide the user with purified air with a certain humidity. Moreover, when the embodiment of the present invention is used, the mask filter 10 is filled with filtering liquid, so the mask filter 10 can be used as a disposable item or reused.

[0051] The preparation method of the mask filter 10 is as follows:

[0052] Step S1: preparing the porous membrane 11, specifically as follows:

[0053] Step S11: prepare the reverse template of the porous membrane 11, and print the reverse template of the porous membrane 11 by 3D printing technology. The surface of the reverse template has an array of pillars (cylinders or flat pillars) with a height of millimeters. The height of the pillars is 0.2-5mm and the diameter is 0.1-2mm. A micro-pit array is made at the bottom of the array. The micro-pits (which can be pillars or cones) have a depth of 0.1-5mm and an edge diameter of 0.1-2mm.

[0054] Step S12: Mix silica gel (which can be ordinary silica gel, polydimethylsiloxane, or other polymer materials) and curing agent in a mass ratio of 1:1-20:1 and pour them on the surface of the counter template. The horizontal height of the silica gel does not exceed the height of the millimeter-level column.

[0055] Step S13: After the silica gel is cured, the cured silica gel is peeled off from the surface of the counter template to obtain a porous membrane 11 having protrusions 111 and air pores 112. The temperature during the curing of the silica gel is maintained at 20-90°C for 0.5-24 hours.

[0056] Step S2, performing super-hydrophobic treatment on the porous membrane 11.

[0057] Step S3 , preparing the shell 12 , and assembling the porous membrane 11 on the shell 12 , so that the membrane and the shell 12 are encapsulated.

[0058] See also Figure 1-Figure 5 The embodiment of the present invention further provides a mask 1, comprising a mask body 20 and a mask filter 10 arranged on the mask body 20. The mask filter 10 is arranged to supply filtered gas to the user, and because the mask filter 10 uses water to assist in filtration, the filtered gas has a certain humidity, so that the user will not feel uncomfortable due to long-term use of the mask 1.

[0059] Preferably, the mask filter 10 is installed in the middle of the mask body 20, so that after the user wears the mask 1, the mask filter 10 is located just in front of the mouth and nose, and the user can breathe filtered gas with a certain humidity. During the inhalation process, the air will pass through the gap of the raised portion 111 and then be transmitted to the user's respiratory system through the air vents 112.

[0060] Preferably, the mask filter 10 is bonded and fixed to the mask body 20. The mask filter 10 and the mask body 20 can be produced separately and then assembled together, or the mask filter 10 can be directly assembled on a mask body 20 available on the market.

[0061] It is understandable that the mask filter 10 can also be fixed to the mask body 20 in other ways, for example, a slot is provided on the mask body 20, and the mask filter 10 is directly connected to the slot.

[0062] It can be understood that the mask body 20 can be a disposable mask 1 or a reusable mask 1. Similarly, the mask filter 10 can be used once or repeatedly.

[0063] Since the mask 1 of the embodiment of the present invention is provided with the mask filter 10, the filtering effect is better, and the filtered air has a certain humidity, which avoids the user feeling uncomfortable due to long-term use of the mask 1.

[0064] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A mask filter, characterized in that: It comprises a porous membrane and a shell with a hollow interior, wherein the shell is provided with a slot and an air inlet, the porous membrane is mounted on the shell and covers the slot, the porous membrane and the shell are enclosed to form a filter cavity, the filter cavity is used to fill the filter liquid, the surface side of the porous membrane facing the filter cavity is convexly provided with a plurality of protrusions, and the porous membrane is penetrated with a plurality of air holes, the protrusions and the air holes are staggered, the surface side of the porous membrane facing the filter cavity, the surface of the protrusions and the surface of the air holes are all subjected to super-hydrophobic treatment, and the air inlet of the shell is connected with the filter cavity; The method for preparing the porous membrane comprises the following steps: Step S11: preparing a counter template of a porous membrane, and printing the counter template of the porous membrane by 3D printing technology, wherein the surface of the counter template has a protrusion array and a micro-pit array, wherein the protrusion array and the micro-pit array are arranged alternately; the protrusion array has a height of 0.2-5 mm and a diameter of 0.1-2 mm; the micro-pit array has a depth of 0.1-5 mm and a diameter of 0.1-2 mm; Step S12: Mixing silica gel and curing agent in a mass ratio of 1:1-20:1 and pouring them on the surface of the counter template, wherein the level of the silica gel does not exceed the height of the protrusion array; Step S13: After the silica gel is solidified, the solidified silica gel is peeled off from the surface of the counter template to obtain a porous membrane with protrusions and air pores.

2. The mask filter according to claim 1, characterized in that: The inner side wall of the shell is recessed to form a slot communicating with the filter cavity, the slot is adapted to the porous membrane, and the porous membrane is inserted into the slot.

3. The mask filter according to claim 1, characterized in that: The air inlet is provided with a breathable and waterproof membrane.

4. The mask filter according to claim 1, characterized in that: The implementation method of super-hydrophobic treatment of the surface side of the porous membrane facing the filter cavity, the surface of the protrusion and the surface of the air vent is as follows: A super-hydrophobic material is sprayed on the surface of the porous membrane facing the filter cavity, the surface of the protrusion and the surface of the air pore.

5. The mask filter according to claim 1, characterized in that: The surface side of the porous membrane facing the filter cavity, the surface of the protrusion and the surface of the air vent are all subjected to super-hydrophobic treatment, which comprises the following steps: Nano zinc oxide is prepared on the surface of the porous membrane facing the filter cavity, the surface of the protrusions and the surface of the air holes; The porous membrane is fluorinated to obtain a super-hydrophobic functional surface.

6. The mask filter according to claim 1, characterized in that: In the step S13, the temperature during the curing of the silica gel is maintained at 20-90° C., and the curing time is 0.5-24 hours.

7. A mask, characterized in that: It comprises a mask body and a mask filter, wherein the mask body adopts the mask filter described in any one of claims 1 to 6, and the mask filter is fixed on the mask body.

8. The mask according to claim 7, characterized in that The shell is bonded and fixed to the middle part of the mask body.

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