Enhanced adsorption type air filtering non-woven fabric and filtering device

Abstract

The utility model discloses an enhanced adsorption type air filtering non-woven fabric which comprises a pre-filtering layer, a fine filtering layer and an adsorption core layer, the fine filtering layer is fixedly arranged on the exhaust side of the pre-filtering layer; the adsorption core layer is fixedly arranged between the pre-filtering layer and the fine filtering layer; the adsorption core layer comprises a non-woven framework layer and a continuous fiber adsorption part which are fixedly connected, the non-woven framework layer is provided with a plurality of adsorption holes penetrating in the thickness direction, the adsorption holes are distributed in the spreading plane of the adsorption core layer in at least two linear directions, and the continuous fiber adsorption part extends in at least one direction in the spreading plane and blocks the adsorption holes. According to the enhanced adsorption type air filtering non-woven fabric, the adsorption core layer is arranged between the pre-filtering layer and the fine filtering layer, the non-woven framework layer serves as a framework to fix the continuous fiber adsorption part, and fiber pores in the continuous fiber adsorption part are large and meanwhile used for containing particle dust blocked by the fine filtering layer; the adsorption performance and the size stability are excellent.

Description

Technical Field

[0001] The utility model relates to the technical field of air filter materials, in particular to an enhanced adsorption type air filter nonwoven fabric and a filter device. Background Art

[0002] The activated carbon setting of air filter non-woven fabrics in the prior art mainly includes the following methods: first, as disclosed in CN205850439U, an antibacterial mesh layer with a grid structure is set between the two surface non-woven fabrics, and the activated carbon particles are filled in the hollow structure of the antibacterial mesh layer; second, the filter cotton or non-woven fabric loaded with activated carbon is compounded with the non-woven fabric for filtration; third, the fibers loaded with activated carbon are blended with other filter fibers, and punctured and entangled into a filter non-woven fabric.

[0003] Filling activated carbon between the pre-filtration layer and the fine filtration layer has a complicated filling process and is difficult to control uniformity. In addition, the activated carbon particles block the filter holes of the fine filtration layer, which is not conducive to maintaining the predetermined service life of the air filtration non-woven fabric. The filter cotton or activated carbon fiber non-woven fabric composite structure increases the overall thickness of the air filtration non-woven fabric, which is not conducive to folding into a denser pleated non-woven fabric. When blending activated carbon fibers with other filter fibers, it is necessary to consider the particle size and the porosity and pore size of the non-woven fabric, and the configuration design is difficult. Utility Model Content

[0004] One of the purposes of the utility model is to overcome the defects in the prior art and provide an enhanced adsorption type air filtration nonwoven fabric, in which a continuous fiber adsorption portion is arranged between the pre-filtration layer and the fine filtration layer, and the nonwoven fabric has excellent adsorption performance and dimensional stability.

[0005] In order to achieve the above technical effects, the technical solution of the utility model is: an enhanced adsorption type air filtration nonwoven fabric, comprising:

[0006] Pre-filter layer;

[0007] A fine filter layer, fixedly arranged on the exhaust side of the pre-filter layer;

[0008] An adsorption core layer is fixedly arranged between the pre-filtration layer and the fine filtration layer;

[0009] The adsorption core layer includes a fixedly connected non-woven skeleton layer and a continuous fiber adsorption part. The non-woven skeleton layer has a plurality of adsorption holes penetrating in the thickness direction. The plurality of adsorption holes are arranged along at least two linear directions within the spreading plane of the adsorption core layer. The continuous fiber adsorption part extends along at least one direction within the spreading plane and is blocked by the adsorption holes.

[0010] A preferred technical solution is that the continuous fiber adsorption part is a nonwoven adsorption layer; the nonwoven adsorption layer has a main adsorption area blocking the adsorption holes and an auxiliary adsorption area connected to the main adsorption area, and the thickness of the main adsorption area is greater than that of the auxiliary adsorption area.

[0011] A preferred technical solution is that the plurality of adsorption holes are arranged along two mutually perpendicular directions in the spreading plane of the adsorption core layer.

[0012] A preferred technical solution is that the continuous fiber adsorption portion is a strip-shaped fiber assembly, and the extension direction of the strip-shaped fiber assembly is consistent with the arrangement direction of the adsorption holes in the spreading plane of the adsorption core layer.

[0013] A preferred technical solution is that the non-woven adsorption layer is arranged on both sides of the non-woven skeleton layer in the thickness direction.

[0014] A preferred technical solution is that the strip-shaped fiber assembly includes a first strip-shaped fiber assembly and a second strip-shaped fiber assembly, and the fiber density of the first strip-shaped fiber assembly is smaller than the fiber density of the second strip-shaped fiber assembly.

[0015] A preferred technical solution is that the constituent fibers of the continuous fiber adsorption portion are activated carbon fibers.

[0016] A preferred technical solution is that the non-woven skeleton layer has a first point-like fiber entanglement area and a first strip-like fiber entanglement area, and the adsorption holes are formed by alternatingly connecting and enclosing the first point-like fiber entanglement area and the first strip-like fiber entanglement area; the thickness of the first point-like fiber entanglement area is greater than the thickness of the first strip-like fiber entanglement area.

[0017] The preferred technical solution is that the main adsorption area is the second point-shaped fiber entanglement area of ​​the non-woven adsorption layer, and the auxiliary adsorption area includes the second strip-shaped fiber entanglement area of ​​the non-woven adsorption layer and the adsorption layer through holes alternately surrounded by the second point-shaped fiber entanglement area and the second strip-shaped fiber entanglement area.

[0018] The second object of the utility model is to provide a filtering device, including a filtering portion made of the above-mentioned enhanced adsorption type air filtering nonwoven fabric.

[0019] The advantages and beneficial effects of the utility model are:

[0020] The enhanced adsorption type air filtration nonwoven fabric is provided with an adsorption core layer between the pre-filtration layer and the fine filtration layer, and a continuous fiber adsorption part is fixed with a nonwoven skeleton layer as a skeleton. The fiber pores in the continuous fiber adsorption part are relatively large and are used to accommodate the particle dust blocked by the fine filtration layer.

[0021] Eliminate the filling process of activated carbon, and the configuration design of producing non-woven fabrics by blending activated carbon fibers with other fibers;

[0022] Enhanced adsorption type air filter nonwoven fabric has excellent adsorption performance and dimensional stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a three-dimensional exploded view of an enhanced adsorption type air filtration nonwoven fabric of an embodiment;

[0024] Figure 2 yes Figure 1 Schematic diagram of the three-dimensional structure of the non-woven skeleton layer;

[0025] Figure 3 yes Figure 1 Exploded view of the front of the embodiment enhanced adsorption type air filtration nonwoven fabric;

[0026] Figure 4 is a front exploded view of another embodiment of an enhanced adsorption type air filtration nonwoven fabric;

[0027] Figure 5 is a three-dimensional exploded view of another second embodiment of the enhanced adsorption type air filter nonwoven fabric;

[0028] In the figure: 1. Pre-filtration layer; 2. Fine filtration layer; 3. Adsorption core layer;

[0029] 31. Nonwoven skeleton layer; 311. Adsorption holes; 312. First point-shaped fiber entanglement area; 313. First strip-shaped fiber entanglement area; 32. Nonwoven adsorption layer; 321. Main adsorption area; 322. Auxiliary adsorption area; 33. Strip-shaped fiber assembly; 331. First strip-shaped fiber assembly; 332. Second strip-shaped fiber assembly. DETAILED DESCRIPTION

[0030] The following is a further description of the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0031] In the description of the present application, it should be noted that, unless otherwise specified, “plurality” means more than two; the terms “upper”, “lower”, “left”, “right”, “inside”, “outside”, etc., indicating directions or positional relationships, are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present application.

[0032] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0033] Example

[0034] like Figure 1-3 As shown, the embodiment of the enhanced adsorption type air filtration nonwoven fabric includes a pre-filter layer 1, a fine filter layer 2 and an adsorption core layer 3; the fine filter layer 2 is fixedly arranged on the exhaust side of the pre-filter layer 1; the adsorption core layer 3 is fixedly arranged between the pre-filter layer 1 and the fine filter layer 2; the adsorption core layer 3 includes a fixedly connected non-woven skeleton layer 31 and a continuous fiber adsorption part, the non-woven skeleton layer 31 has a plurality of adsorption holes 311 penetrating in the thickness direction, the plurality of adsorption holes 311 are arranged along at least two straight directions in the spreading plane of the adsorption core layer 3, and the continuous fiber adsorption part extends along at least one direction in the spreading plane and is blocked in the adsorption holes 311.

[0035] In this embodiment, the filtered air sequentially passes through the pre-filter layer 1, the adsorption core layer 3 and the fine filter layer 2. The average pore size of the adsorption core layer 3 is larger than the average pore size of the pre-filter layer 1 and the fine filter layer 2, and the average pore size of the pre-filter layer 1 is larger than the average pore size of the fine filter layer 2.

[0036] The continuous fiber adsorption part is blocked in the adsorption hole 311, which increases the probability of the passing air contacting with the activated carbon in the continuous fiber adsorption part, thereby improving the odor removal effect of the air filtering non-woven fabric.

[0037] Optionally, the adsorption holes 311 are distributed along two or three linear directions within the spreading plane of the adsorption core layer 3; when the adsorption holes 311 are distributed along two directions within the spreading plane of the adsorption core layer 3, including but not limited to the adsorption holes 311 being distributed in a rectangular array; when the adsorption holes 311 are distributed along three directions within the spreading plane of the adsorption core layer 3, including but not limited to the adsorption holes 311 forming an equilateral triangle.

[0038] The two connected layers among the pre-filtration layer 1, the adsorption core layer 3 and the fine filtration layer 2 are entangled or thermally compounded by puncturing fibers.

[0039] The adsorption holes 311 are arranged in a straight line within the spreading plane of the adsorption core layer 3, so the continuous fiber adsorption part can be selected as a layer directly opposite to the pre-filtration layer 1 and the fine filtration layer 2, or as a strip only with the adsorption holes 311 arranged in a straight line.

[0040] The continuous fiber adsorption part is a nonwoven adsorption layer 32 ; the nonwoven adsorption layer 32 has a main adsorption area 321 blocking the adsorption holes 311 and an auxiliary adsorption area 322 connected to the main adsorption area 321 , and the thickness of the main adsorption area 321 is greater than that of the auxiliary adsorption area 322 .

[0041] The main adsorption area 321 is filled in the adsorption hole 311 to make the thickness of the air filter nonwoven fabric uniform and introduce more adsorption fibers into the air filter nonwoven fabric. Furthermore, the thickness of the main adsorption area 321 is slightly smaller than the thickness of the nonwoven skeleton layer 31 to reserve a dust cavity in the adsorption layer to provide a storage space for the fine filter layer 2 to block the retained particulate dust.

[0042] like Figure 1-2 As shown, in another preferred embodiment, a plurality of adsorption holes 311 are arranged along two mutually perpendicular directions in the spreading plane of the adsorption core layer 3 .

[0043] In this embodiment, a plurality of adsorption holes 311 are arranged in the X direction and the Y direction within the spreading plane of the adsorption core layer 3. In the actual production of non-woven fabrics, one of the X and Y directions is the length direction of the non-woven fabric, and the other is the width direction of the non-woven fabric. The preferred arrangement of the adsorption holes 311 facilitates the stacking of the continuous fiber adsorption part.

[0044] like Figure 5 As shown, in another preferred embodiment, the continuous fiber adsorption portion is a strip-shaped fiber assembly 33 , and the extension direction of the strip-shaped fiber assembly 33 is consistent with the arrangement direction of the adsorption holes 311 in the spreading plane of the adsorption core layer 3 .

[0045] The strip-shaped fiber assembly 33 can be selected as a strip-shaped fiber bundle, or a non-woven fabric strip having a predetermined fiber bulkiness after being punctured, entangled and cut.

[0046] like Figure 4 As shown, in another preferred embodiment, the non-woven adsorption layer 32 is arranged on both sides of the non-woven skeleton layer 31 in the thickness direction.

[0047] Compared with being arranged on one side, the nonwoven adsorption layer 32 is arranged on both sides of the nonwoven skeleton layer 31, and the surface flatness of the adsorption core layer 3 is high, which is convenient for hot pressing composite with the pre-filtration layer 1 and the fine filtration layer 2, and the composite strength is higher.

[0048] like Figure 5 As shown, in another preferred embodiment, the strip-shaped fiber assembly 33 includes a first strip-shaped fiber assembly 331 and a second strip-shaped fiber assembly 332 , and the fiber density of the first strip-shaped fiber assembly 331 is less than the fiber density of the second strip-shaped fiber assembly 332 .

[0049] In some filtering devices, non-woven fabric is sandwiched in a flange with a pleated structure to form a cylindrical filter element, or is set in a frame to form a plate-frame filter element. The extension direction of the top and bottom edges of the pleats of the pleated structure is consistent with the extension direction of the second strip fiber assembly 332, thereby reducing the adverse effect of the excessively high fiber density of the first strip fiber assembly 331 on increasing the pleat density and ensuring the adsorption and deodorization effect of the pleated surface.

[0050] In some embodiments, the continuous fiber adsorption part, that is, the non-woven adsorption layer 32 and the strip fiber assembly 33 are composed of activated carbon fibers.

[0051] Activated carbon fiber has a large specific surface area and good adsorption performance.

[0052] like Figure 2 As shown, in another preferred embodiment, the non-woven skeleton layer 31 has a first point-like fiber entanglement area 312 and a first strip-like fiber entanglement area 313, and the adsorption hole 311 is formed by alternatingly connecting and enclosing the first point-like fiber entanglement area 312 and the first strip-like fiber entanglement area 313; the thickness of the first point-like fiber entanglement area 312 is greater than the thickness of the first strip-like fiber entanglement area 313.

[0053] In addition to blocking the adsorption holes 311, the nonwoven adsorption layer 32 is also stacked with the first strip fiber entanglement area 313, further increasing the distribution area of ​​the nonwoven adsorption layer 32 on the surface of the air filtration nonwoven fabric, further optimizing the adsorption and deodorization effect. Furthermore, the nonwoven skeleton layer 31 is made by puncturing rather than cutting.

[0054] like Figure 1 As shown, in another preferred embodiment, the main adsorption area 321 is the second dot-shaped fiber entanglement area of ​​the nonwoven adsorption layer 32, and the auxiliary adsorption area 322 includes the second strip-shaped fiber entanglement area of ​​the nonwoven adsorption layer 32 and the adsorption layer through hole formed by the second dot-shaped fiber entanglement area and the second strip-shaped fiber entanglement area alternately surrounded. Furthermore, the nonwoven adsorption layer 32 is made by puncturing rather than slitting.

[0055] Furthermore, the thickness of the second point-shaped fiber entanglement area is greater than the thickness of the second strip-shaped fiber entanglement area.

[0056] The first strip-shaped fiber entanglement area 313 and the second strip-shaped fiber entanglement area are stacked along the thickness direction of the non-woven adsorption layer 32, which ensures the adsorption performance while making the thickness and strength of the adsorption core layer 3 more uniform.

[0057] In the filter device of the embodiment, it includes a filter part made of the above-mentioned enhanced adsorption type air filter nonwoven fabric, and the air filter nonwoven fabric of the filter part is in a spread state or in a pleated state.

[0058] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An enhanced adsorption type air filtration nonwoven fabric, comprising: Pre-filter layer; A fine filter layer, fixedly arranged on the exhaust side of the pre-filter layer; An adsorption core layer is fixedly arranged between the pre-filtration layer and the fine filtration layer; It is characterized in that the adsorption core layer includes a fixedly connected non-woven skeleton layer and a continuous fiber adsorption part, the non-woven skeleton layer has a plurality of adsorption holes penetrating in the thickness direction, the plurality of adsorption holes are arranged along at least two linear directions within the spreading plane of the adsorption core layer, and the continuous fiber adsorption part extends along at least one direction within the spreading plane and is blocked by the adsorption holes.

2. The enhanced adsorption type air filtration nonwoven fabric according to claim 1, characterized in that: The continuous fiber adsorption part is a nonwoven adsorption layer; the nonwoven adsorption layer has a main adsorption area blocked by the adsorption holes and an auxiliary adsorption area connected between the main adsorption areas, and the thickness of the main adsorption area is greater than that of the auxiliary adsorption area.

3. The enhanced adsorption type air filtration nonwoven fabric according to claim 1, characterized in that: The plurality of adsorption holes are arranged along two mutually perpendicular directions in the spreading plane of the adsorption core layer.

4. The enhanced adsorption type air filtration nonwoven fabric according to claim 3, characterized in that: The continuous fiber adsorption portion is a strip-shaped fiber assembly, and the extension direction of the strip-shaped fiber assembly is consistent with the arrangement direction of the adsorption holes in the spreading plane of the adsorption core layer.

5. The enhanced adsorption type air filtration nonwoven fabric according to claim 2, characterized in that: The nonwoven adsorption layer is arranged on both sides of the nonwoven skeleton layer in the thickness direction.

6. The enhanced adsorption type air filtration nonwoven fabric according to claim 4, characterized in that: The strip-shaped fiber assembly includes a first strip-shaped fiber assembly and a second strip-shaped fiber assembly, and the fiber density of the first strip-shaped fiber assembly is smaller than the fiber density of the second strip-shaped fiber assembly.

7. The enhanced adsorption type air filtration nonwoven fabric according to claim 1, characterized in that: The constituent fibers of the continuous fiber adsorption part are activated carbon fibers.

8. The enhanced adsorption type air filtration nonwoven fabric according to claim 2, characterized in that: The nonwoven skeleton layer has a first point-shaped fiber entanglement area and a first strip-shaped fiber entanglement area, and the adsorption holes are formed by alternately connecting and enclosing the first point-shaped fiber entanglement area and the first strip-shaped fiber entanglement area; the thickness of the first point-shaped fiber entanglement area is greater than the thickness of the first strip-shaped fiber entanglement area.

9. The enhanced adsorption type air filtration nonwoven fabric according to claim 8, characterized in that: The main adsorption area is the second dot-shaped fiber entanglement area of ​​the nonwoven adsorption layer, and the auxiliary adsorption area includes the second strip-shaped fiber entanglement area of ​​the nonwoven adsorption layer and the adsorption layer through holes alternately surrounded by the second dot-shaped fiber entanglement area and the second strip-shaped fiber entanglement area.

10. A filtering device, characterized in that: A filter portion comprising the enhanced adsorption type air filtration nonwoven fabric according to any one of claims 1 to 9.

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