Nanofiber air deodorizing filtering material, filtering plate and air purifier

Abstract

The utility model belongs to the technical field of air filtering equipment, and discloses a nanofiber air deodorization filtering material, a filtering plate and an air purification.The material is of a composite layer structure formed by combining a non-woven fabric layer and a nanofiber layer which are sequentially stacked into a whole, the nanofiber layer is composed of a mesh and activated carbon particles fixed to the mesh, and the activated carbon particles are evenly distributed on the non-woven fabric layer and the nanofiber layer. The activated carbon particles are composed of fine activated carbon particles and coarse activated carbon particles, the fine activated carbon particles are wrapped in the silk threads and / or fixed to the surfaces of the silk threads, and the coarse activated carbon particles are fixed in the pore structures of the meshes. The material is used as a filter plate and an air filter component in an air purifier, is applied to window air purifiers and the like, and can realize air odor removal and filtration.

Description

Technical Field

[0001] The utility model belongs to the technical field of air filtering equipment and relates to a nanofiber filtering material, in particular to a nanofiber air deodorizing filtering material, a filtering plate and an air purifier. Background Art

[0002] With the deepening of industrialization, the emission of industrial waste gas containing dust particles is increasing day by day. Furthermore, the blowing sand and dust caused by soil erosion also have a negative impact on air quality. As people pursue a higher quality of life, air purifiers have become a research hotspot.

[0003] In air purifiers, filter elements or screens, among other components, are key to air filtration effectiveness. Activated carbon, known for its deodorizing properties, is often used in these filter elements. For example, Chinese invention patent application No. 201210542067.9 discloses an air filter material containing activated carbon, comprising an activated carbon layer sandwiched between at least two non-woven fabric layers. The densely packed structure formed by stacking three or more layers of material in this filter material inevitably sacrifices significant effective surface area, hindering the diffusion of target air pollutants into the filter element and resulting in a relative decrease in adsorption performance. Furthermore, as the number of non-woven fabric layers or activated carbon layers in the filter material increases, the overall material becomes thicker, hindering air circulation and resulting in low air purification efficiency. Summary of the Invention

[0004] In order to solve the above deficiencies in the prior art, the present invention aims to provide a nanofiber air deodorizing filter material to improve the adsorption effect of the filter component and enhance the air purification efficiency;

[0005] The utility model also provides an air deodorizing filter plate and an air purifier based on the nanofiber air deodorizing filter material.

[0006] To achieve the above object, the technical solutions adopted by the present invention are as follows:

[0007] A nanofiber air deodorizing filter material, comprising a composite layer structure comprising sequentially stacked non-woven fabric layers and nanofiber layers combined into one; the nanofiber layer comprises a mesh formed by interlacing a plurality of silk threads and activated carbon particles fixed to the mesh; the silk threads of the mesh are interlaced to form a pore structure; the activated carbon particles comprise fine activated carbon powder particles having a diameter no greater than that of the silk threads and coarse activated carbon powder particles having a diameter greater than that of the silk threads; the fine activated carbon powder particles are wrapped within the silk threads and / or fixed to the surface of the silk threads; and the coarse activated carbon powder particles are fixed within the pore structure.

[0008] The thickness of the non-woven fabric layer is 0.1-2 mm. Preferably, the particle size of the activated carbon particles is no greater than 1 μm; and the thickness of the nanofiber layer is 10 μm-0.1 mm.

[0009] As another limitation of the present invention, the non-woven fabric layer and the nanofiber layer are both one layer, that is, the nanofiber air deodorizing filter material is a composite layer structure composed of two layers of material combined into one, with a small thickness and good light and air permeability.

[0010] As a limitation of the present invention, the non-woven fabric layer and the nanofiber layer are in a bent wavy structure.

[0011] An air deodorizing filter plate comprises a supporting net and the above-mentioned nanofiber air deodorizing filter material, wherein the edge of the nanofiber air deodorizing filter material is fixed to the edge of the supporting net.

[0012] An air purifier comprises the above-mentioned nanofiber air deodorizing filter material.

[0013] Due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0014] (1) The nanofiber air deodorizing filter material of the present invention has a composite layer structure in which a non-woven fabric layer and a nanofiber layer are integrated into one, and has an outstanding air filtering effect. Among them, the silk threads in the mesh of the nanofiber layer are interlaced to form smaller pores, which can intercept dust and other impurities with particle sizes larger than the pores, thereby improving the filtering effect. The smaller particle size of activated carbon is wrapped inside the silk threads ejected by electrospinning. Compared with the separately provided activated carbon interlayer in the prior art, it is lighter and thinner, has better air permeability, and the larger particle size of activated carbon is stuck between the pores and is not easy to fall off.

[0015] When the non-woven fabric layer and the nanofiber layer are in a bent wavy structure, the contact area between the nanofiber air deodorizing filter material and the air can be increased, thereby improving the air filtering and adsorption effect.

[0016] (2) The nanofiber air deodorizing filter material of the utility model is thin and light-transmissive, so it has little impact on lighting when used in windows. It can achieve good air deodorizing filtering effects when used as part of a filtering component in an air deodorizing filter plate and an air purifier. The air purifier made of the material can be used in nursing homes or hospitals, can effectively absorb odors in the air, and the material replacement operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments;

[0018] Figure 1 This is a schematic cross-sectional view of the nanofiber air deodorizing filter material according to Example 1 of the present utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the nanofiber layer of Example 1 of the present utility model;

[0020] In the figure, 1-non-woven fabric layer; 2-nanofiber layer; 3-silk thread; 4-mesh; 5-activated carbon particles; 6-pore structure. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below through specific embodiments. It should be understood that the described embodiments are only used to explain the present invention, and do not limit the present invention.

[0022] Example 1 A nanofiber air deodorizing filter material

[0023] This embodiment is a composite sheet structure composed of a non-woven fabric layer 1 with a thickness of 1 mm and a nanofiber layer 2 with a thickness of 0.1 mm, which are stacked and combined in sequence. The cross-sectional structure of embodiment 1 is as follows: Figure 1 shown.

[0024] Among them, such as Figure 2 As shown, the nanofiber layer 2 is composed of a mesh 4 formed by interlacing a plurality of threads 3 ejected by electrospinning and activated carbon particles 5 fixed to the mesh 4; the threads 3 of the mesh 4 are interlaced to form a pore structure 6.

[0025] The activated carbon particles 5 are composed of fine activated carbon powder particles with a particle size not larger than the diameter of the wire 3 and coarse activated carbon powder particles with a particle size larger than the diameter of the wire 3; wherein the fine activated carbon powder particles are wrapped inside the wire 3 and / or fixed on the surface of the wire 3; the coarse activated carbon powder particles are fixed in the pore structure 6.

[0026] The preparation and use process of this embodiment are as follows:

[0027] S1. Take 5000gN,N-dimethylformamide, 800g polyurethane and 30g activated carbon fine powder with a particle size of less than 100nm in a weight ratio of 500:80:3, heat and stir at 50°C for 24h until mixed to obtain a spinning solution;

[0028] S2. With a specification of 13g / cm 2A spunbond non-woven fabric with a thickness of 1 mm is used as the receiving substrate, and the spinning solution is taken and placed in the solution chamber of the electrospinning machine. The spinning voltage is set to 25 kV, the distance between the non-woven fabric and the spinneret is 20 cm, the spinneret spraying rate is 0.6 ml / h, the spinneret diameter is 10 μm, the temperature is controlled at 25 ° C, and the humidity is controlled at 20%. Silk thread is spun on the surface of the non-woven fabric, and 60 g of activated carbon coarse powder with a particle size greater than 100 nm and less than 600 nm is sprayed on the surface of the silk thread using a spraying device to obtain a nanofiber layer with a thickness of 0.1 mm. After cooling, the non-woven fabric and the nanofiber layer are bonded together to obtain a nanofiber air deodorizing filter material.

[0029] Nanofiber air deodorizing filter material is used as a filter mesh or folded into a wavy structure, and multiple pieces are combined and glued together as a filter element to increase the contact area with the air. It is installed in the air purifier. When air flows through the filter material, the silk threads in the mesh of the nanofiber layer are intertwined to form smaller pores, which can intercept dust and other impurities with particle sizes larger than the pores. The smaller particle size of activated carbon fine powder is wrapped inside the silk threads sprayed out by electrospinning or adheres to the surface of the silk threads. Compared with the separately set activated carbon interlayer in the existing technology, it is lighter and thinner, has better breathability, and the larger particle size of activated carbon is stuck between the pores and is not easy to fall off.

[0030] Verification of usage effect: According to GB / T 14295-2019, the counting efficiency of the nanofiber air deodorization filter material sample of this embodiment was tested at the rated air volume. The results showed that the counting efficiency reached 80%.

[0031] In other embodiments, the thickness of the non-woven fabric layer is 0.1 mm, 0.5 mm, or 2 mm, the particle size of the activated carbon particles is no more than 1 μm, and the thickness of the nanofiber layer is a specific value of 10 μm, 0.05 mm, or 0.1 mm, all of which can achieve air deodorization and filtration effects.

[0032] Example 2: An air deodorizing filter plate

[0033] This embodiment includes a support net and the nanofiber air deodorizing filter material of Example 1 cut to a size of 80cm×140cm. The edge of the filter material is fixed to the edge of the support net and is installed on the window when in use. It can absorb dust and impurities in the air flowing into the room, and the activated carbon particles in the filter material can effectively absorb odors.

[0034] Example 3: An air purifier

[0035] The filter component in the air purifier of this embodiment includes the nanofiber air deodorizing filter material prepared in Example 1. The air purifier is used in nursing homes and hospitals to effectively absorb odors in the air, and the filter material is easy to replace.

[0036] It should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art may still modify the technical solutions described in the above embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A nanofiber air deodorizing filter material, characterized in that: It is a composite layer structure composed of sequentially stacked non-woven fabric layers and nanofiber layers; The nanofiber layer is composed of a mesh formed by interlacing a plurality of silk threads and activated carbon particles fixed to the mesh; the silk threads of the mesh are interlaced to form a pore structure; The activated carbon particles are composed of fine activated carbon particles with a diameter no greater than that of the wire and coarse activated carbon particles with a diameter greater than that of the wire; the fine activated carbon particles are wrapped inside the wire and / or fixed on the surface of the wire; the coarse activated carbon particles are fixed in the pore structure.

2. The nanofiber air deodorizing filter material according to claim 1, characterized in that: The non-woven fabric layer and the nanofiber layer are both one layer.

3. The nanofiber air deodorizing filter material according to claim 2, characterized in that: The non-woven fabric layer and the nanofiber layer are in a bent wavy structure.

4. An air deodorizing filter plate, characterized in that: The invention comprises a supporting net and the nanofiber air deodorizing filter material according to any one of claims 1 to 3, wherein the edge of the nanofiber air deodorizing filter material is fixed to the edge of the supporting net.

5. An air purifier, characterized in that: The invention comprises the nanofiber air deodorizing filter material according to any one of claims 1 to 3.

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