TWI580908B - Filter device, manufacturing method thereof and air cleaner comprising the same - Google Patents

Description

Filter device, method of manufacturing the same, and air filtering device including the same

The present invention relates to a screen device; in particular, the invention relates to a three-dimensional screen device.

Factors affecting air composition are naturally generated by human and material activities. Human activities with specific purposes and needs, such as transportation and industrial activities, are also factors that affect air composition and even quality. Changes in air quality, and even air pollution, may affect the health of the organism, or affect the operation of household and industrial equipment. In addition, in some industries where strict requirements are imposed on the operating environment, the maintenance of air quality or the prevention of pollution is exceptional. important.

In addition to reducing the generation of pollutants, air purification equipment can be used to enhance air quality by enhancing ventilation and filtering air components. The filter material may be, for example, a common fiber filter, a HEPA filter, an electrostatic filter, an activated carbon, an electronic (negative ion, ozone, photocatalyst) dust collection; in addition to the manner of collecting and filtering the particles, the filter material may be added. Deodorant, antibacterial equivalent.

The filtration efficiency of the filter material may depend on the dust holding capacity, pressure loss, filtration efficiency, and even the gas flow rate; wherein the shape of the filter material such as the number and size of the screen and its relationship with the direction of the gas flow may directly or indirectly affect the front The reason for determining the filtering performance. Figure 1A shows a conventional screen device. The screen device 9a is a two-dimensional filter sheet body, and has a large area which can be expressed by length * width. small. In general, the larger the length*width of the filter, the larger the inlet area, and the better the filtration efficiency; in other words, the filtration efficiency of the two-dimensional filter is limited by its area. The conventional screen device shown in Fig. 1B is designed to change the shape of the hollow tube by changing the filter device, to obtain the air inlet area in a limited space, or to increase the air inlet area in the same space. Only the air inlet surface and the inner circumference air outlet surface on the outer circumference of the hollow circular tube are limited by the geometric characteristics of the round tube; however, the air flow from the air inlet surface to the air outlet surface is substantially in the direction of the center of the circle. Non-parallel access, resulting in a large differential pressure on both sides of the filter, reducing filtration efficiency.

It is an object of the present invention to provide a screen device having a high filtration efficiency.

The present invention provides a screen apparatus for an air filtration apparatus comprising a filter unit and a first screen body. The filter unit has a ventilation passage penetrating to have a hollow columnar structure; the air passages respectively form a first opening and a second opening through the two ends of the filter unit. The first filter mesh body is disposed at the first opening of the filter unit.

The invention provides an air filtering device comprising the aforementioned screen device and a flow guiding device. The flow guiding device is disposed at the second opening, and the guiding airflow flows into the air passage from an outer region of the filter device.

The present invention provides a method of manufacturing a screen device, comprising providing a jig, wherein the jig has a receiving space of a predetermined shape; and providing a mesh body embedded in the receiving space, wherein the mesh body is bent and has Having a corresponding shape of the receiving space; coating the resin on the filter sheet; and curing the light resin to maintain the predetermined shape after the filter sheet is taken out of the jig.

〔this invention〕

1‧‧‧Air filtration equipment

10a, 10b, 10c, 10A, 10B, 10C, 11A, 12A‧‧‧ filter device

100‧‧‧Filter unit

200‧‧‧ ventilation duct

2010‧‧‧First opening

2020‧‧‧ second opening

300‧‧‧First filter mesh

310‧‧‧ ridge

400‧‧‧Second filter mesh

410‧‧‧ ridge

500‧‧‧third filter mesh

P1~P5, P1', P2'‧‧‧ filter surface

70‧‧‧ flow guiding device

90‧‧‧ fixture

900‧‧‧ accommodation space

[study]

9a‧‧‧Filter device

1A to 1B are schematic views of a conventional screen device; Figs. 2A to 2D are schematic views showing an embodiment of a screen device according to the present invention; and Figs. 3A to 3C are views showing another embodiment of the screen device of the present invention. 4A to 4D are schematic views showing still another embodiment of the screen device of the present invention; Fig. 5 is a schematic cross-sectional view showing an embodiment of the air filtering device of the present invention; and Fig. 6 is a view showing the manufacture of the screen device of the present invention; Flow chart of the method; FIG. 7A to FIG. 7B are schematic views showing the manufacture of the filter device of the present invention.

2A-2B show an embodiment of a screen device for an air filtration device of the present invention. As shown in Figs. 2A to 2B, the screen device 10a of the present invention is a three-dimensional screen device. For example, the screen device 10a includes at least two filter surfaces, and adjacent filter surfaces of the filter surfaces are combined to form a three-dimensional space; wherein the filter surfaces are preferably planar or curved.

Preferably, the screen device 10a comprises a filter unit 100 and a first screen body 300; wherein the filter unit 100 and the first screen body 300 respectively provide or serve as filter faces for the screen device 10a. In addition to the first screen body 300, the screen device 10a may further comprise filter sheets such as second, third, etc., for example, the filter unit 100 is formed by a plurality of screen sheets, wherein the single screen sheet can be A filter surface is contributed, but a plurality of filter faces can also be formed. For example, the mesh body 400 is bent/curved to form four filter faces P2 to P5 (described later in detail).

The filter material of the first sieve body 300 and the filter unit 100 includes but is not limited to a common fiber filter, a high-efficiency partial air (HEPA) filter, an electrostatic filter, an activated carbon, an electronic (negative ion, ozone, photocatalyst). Dust collection and combination thereof; in addition to different ways of collecting and filtering particles, the filter material can also be deodorized and antibacterial equivalent. In this In a preferred embodiment of the invention, the screen device 10a uses a HEPA filter.

The filter unit 100 is formed as a hollow column structure and has a ventilation passage 200 penetrating therein. The air passage 200 forms a first opening 2010 and a second opening 2020 respectively at both ends of the filter unit 100. As shown in FIG. 2A, the filter unit 100 is provided with a first screen body 300 in the first opening 2010, and the first screen body 300 and the filter unit 100 together form a three-dimensional space such as a box; The inner space surrounded by the screen body 300 and the filter unit 100 is the position of the air passage 200.

In the embodiment of the screen device 10a, the first screen body 300 is independent of the filter unit 100 and is bonded to the filter unit 100 by bonding, such as bonding to the first opening 2010. Further, the filter unit 100 may be formed of the same material as the first screen body 300. As shown in FIG. 2A, the screen device 10a further includes a second screen body 400, and the second screen sheet 400 is bent/bent to form the filter unit 100. The second screen body 400 is bent/curved to form two adjacent filter faces, wherein the filter unit 10a shown in FIG. 2A is bent/curved by the second screen body 400 to have four filter faces P2. ~P5 hollow polygonal column structure. In other words, the filter unit 100 in this embodiment is formed by a single screen body; while in other embodiments, the filter unit 100 can be formed by a plurality of screen sheets.

Therefore, as shown in FIGS. 2A to 2B, the screen device 10a has the first filter sheet body 300 contributing the first filter surface P1 and the second screen sheet body 400 contributing the second to fifth filter surfaces P2 to P5, wherein A filter surface P1 faces the second opening 2020, and the second to fifth filter surfaces P2 to P5 surround the air passage 200, and the normal lines of any two adjacent filter surfaces (such as P1 and P3) (such as L1 and L3) the extension intersects at one point; in this embodiment, the first filter surface P1 is substantially perpendicular to the second to fifth filter surfaces P2 to P5, and the second to fifth filter surfaces P2 to P5 are respectively adjacent to the adjacent filter surface. It is substantially vertical so as to constitute a five-sided (filter surface) three-dimensional screen device 10a. When the flow guiding device (described in detail later) is disposed at the second opening 2020, the flow guiding device faces the first filter surface P1, and preferably the gas is self-aligned to the first filter mesh body 300 / the first filter surface P1 Introduce air duct 200 and bring The airflow is directed toward the second opening 2020.

In addition to bending to form a hollow corner column structure, the second screen mesh 400 can also be bent around the space of the circular tube shape (Fig. 2C) or the elliptical tube shape (Fig. 2D) to form the cylindrical shape of the filter screen devices 10b and 10c, respectively. Elliptical cylindrical air passage 200.

In the embodiment of the present invention, for convenience of description, the side where the second opening 2020 is located is generally regarded as the bottom of the screen device 10a, 10b or 10c. Therefore, the distance between the first screen body 300 and the second opening 2020 is the length L of the air passage 200, and can be roughly regarded as the height of the screen device. In a preferred embodiment of the invention, the height of the screen device 10a, 10b or 10c is relatively short compared to its length, width, diameter or axial length; that is, compared to the high, narrow profile, The mesh device 10a, 10b or 10c is preferably short and wide. At this time, the air passage 200 has a short length and a large cross-sectional area. At this time, the flow guiding device (described in detail later) is adapted to be disposed at the second opening 2020, that is, in the bottom direction of the screen device 10a, 10b or 10c and facing the first filter having a shape and a size substantially corresponding to the air passage 200. The mesh body 300 or the first filter surface P1; the flow guiding device can introduce the gas from the opposite first filter mesh body 300 or the first filter surface P1 into the air passage 200 and lead in the bottom direction. In other words, at this time, there is a large airflow and a large amount of filtering in the direction of the parallel air passage 200, wherein the relatively large first screen body 300/first filter surface P1 and the air passage 200 have a reduced cross section and Match this large amount of filtration.

3A to 3C show another embodiment of the screen device for an air filtering device of the present invention. The same as the embodiment shown in FIGS. 2A-2B, the screen device 10A includes the filter unit 100 and the first screen body 300; in addition to the first screen body 300, the screen device 10a may further include Second, third, etc., the filter sheet 100, for example, the filter unit 100 is formed by a plurality of sieve sheets. In addition, at least one of the filter mesh bodies of the filter device 10A is a folded filter mesh; in other words, the other filter mesh bodies of the filter mesh device 10A may be non-folded filter meshes, and may be other filter media, as shown in FIGS. 3B-3C. Show. For example, the amount of air inflow, wind direction, and amount of dust in the different directions of the screen device can be different. Use a different filter material to get better filtration at a reasonable cost.

The first screen body 300 shown in Figures 3A and 3B is a folded screen. It is characterized in that it is reciprocally folded by its sheet extending direction (e.g., in the x-y coordinate plane), thereby forming a larger total filtering area due to the three-dimensional folded configuration in the same plane range. The three-dimensional folded configuration forms a ridge 310 at its high and low points.

In the embodiment shown in FIGS. 3A-3C, the distribution direction of the folded structure is substantially perpendicular to the upward and downward folding directions, but is not limited thereto; the three-dimensional structure for increasing the total filtering area is not limited to the folded structure, It can be, for example, a relief. In addition, the plurality of sieve sheets other than the first screen body 300 may also be a folded screen. For example, at least one of the filter sheets of the second, third, etc. is a folded screen, and the folded screen or the folded screens can be bent along the distribution direction of the folded structure to form a filter. The unit 100 can also be bent and joined to each other to form the filter unit 100.

As shown in FIG. 3A, in the embodiment of the screen device 10A, the first screen body 300 is independent of the filter unit 100, and is bonded to the filter unit 100 by bonding, such as bonding to the first opening 2010; Unit 100 can also be formed from a folded screen. As shown in FIG. 3A, the screen device 10A further includes a folded second screen body 400, and the second screen sheet 400 is bent along the distribution direction of the folded structure to form the filter unit 100; wherein The filter unit 10a is bent by the second sieve sheet body 400 to form a hollow corner column structure having four filter faces P2 to P5. In other embodiments, the filter unit 100 can also be formed by a plurality of mesh sheets.

Therefore, as shown in FIG. 3A, the screen device 10A has the first filter mesh body 300 contributing the first filter surface P1 and the second filter mesh body 400 contributing the second to fifth filter faces P2 to P5, wherein the first filter The surface P1 faces the second opening 2020, and the second to fifth filter surfaces P2 to P5 surround the air passage 200. In addition, in this embodiment, the direction of the air passage 200 is substantially the same as the direction in which the ridges 410 of the folded second screen body 400 extend, but is not limited thereto; the fold structure of the first screen body 300 Distribution direction and second The distribution directions of the folded structures on the fourth filter faces P2 and P4 are parallel, and are perpendicular to the distribution directions of the fold structures on the third and fifth filter faces P3 and P5.

In addition, the first screen body 300 may also be independent of the filter unit. As shown in the embodiment shown in FIG. 4A, the folded first screen sheet body 300 is bent twice, and forms a first filter surface P1 and second and third filters respectively adjacent to the first filter surface P1 and opposed to each other. The faces P2' and P3'; that is, the first mesh sheet body 300 is bent to form a three-dimensional ㄇ-shaped structure, but is not limited thereto. The second filter surface P2' and the third filter surface P3' may be parallel to each other, or may be close to each other while leaving the first filter surface P1, or may be trapezoidal as they are apart from each other. With this design, the second filter face P2' and the third filter face P3' itself or the folds thereon can increase the impact area on the air passage 200 to increase the filtering effect.

As shown in FIG. 4A, the screen device 11A further includes a second screen body 400 and a third screen sheet 500. The second filter mesh body 400 and the third filter mesh body 500 are oppositely disposed on both sides of the three-dimensional U-shaped cross-sectional structure formed by bending the first mesh mesh body 300 and are engaged with the first mesh mesh body 300, thereby Forming a fourth filter surface P4' and a fifth filter surface P5', respectively, which are respectively connected to the second and third filter surfaces P2', P3'; at this time, the direction of the air passage 200 and the fourth filter surface P4' and the The ridges 410 of the five filter faces P5' extend substantially in the same direction, and are different from the direction in which the ridges 410 of the second and third filter faces P2', P3' extend. Therefore, in the embodiment shown in FIG. 4A, the portion of the first screen sheet 300 can be considered to form the filter unit 100 together with the second and third screen sheets 400, 500. The first filter mesh body 300 and the second filter mesh body 400 and the third filter mesh body 500 together form a three-dimensional space, wherein the second to fifth filter faces P2 P P5 meet and surround the air passage 200, The first filter surface P1 contributed by the first screen body 300 faces the second opening 2020 of the air passage 200.

Figure 4B illustrates yet another embodiment. The screen device 12A includes a first screen body 300 and a second screen body 400, wherein the first screen body 300 is bent once to contribute two filter surfaces, and the second screen body 400 is subjected to secondary bending contribution. Three filter faces are joined to the first mesh sheet body 300 to form five sides The three-dimensional screen device 12A (filter surface). Further, in addition to being formed into a hollow corner post structure, a structure such as a hollow cylindrical shape (Fig. 4C) or a hollow elliptical cylindrical shape (Fig. 4D) may be formed. Wherein, for example, the second screen sheet body 400 is curved around the space of the cylindrical shape (Fig. 4C) or the elliptical cylindrical shape (Fig. 4D) along the distribution direction of the folded configuration to form the cylindrical and elliptical columns of the screen devices 10B and 10C, respectively. Shaped air duct 200. Further, in addition to forming a hollow rectangular corner column structure, a triangular prism or a pyramid structure may be formed.

FIG. 5 is a schematic view showing an embodiment of the air filtering device of the present invention. The air filtering device of the present invention comprises the aforementioned screen device and flow guiding device 70; as shown in Fig. 5, the screen device 11A is included. The flow guiding device 70 is disposed at the second opening 2020 of the screen device 11A, and the guiding airflow flows into the air passage 200 from the outer region of the screen device 11A. Further, the airflow is filtered through the filter unit 100 and the first filter mesh 300 into the air passage 200 and flows out through the second opening 2020.

Since the screen device 11A is a three-dimensional screen device, and has (1) a plurality of filter faces and (2) the adjacent filter faces of the filter faces are not parallel, that is, the filter faces face in different directions and constitute The three-dimensional space feature, the filter device 11A not only has a large air inlet area, but also can bring airflow into the air passage 200 from a plurality of directions, thereby improving the filtering efficiency. In the embodiment of the present invention, the square meter is the unit of the wind inlet area, and the unit is the cubic meter per hour as the clean air output rate (CADR) as an indicator of the filtration efficiency.

Furthermore, the screen device 11A maintains the air inlet surface of each filter surface facing the outer region and the air surface facing the air passage, and the air flow can enter and exit substantially parallel from the wind inlet surface to the air outlet surface, thereby ensuring the filter surface two. There is no pressure difference or a small pressure difference on the side, that is, the pressure difference is excluded.

The method for manufacturing the screen device of the present invention, taking the embodiment shown in FIG. 6 as an example, includes the step 810: providing a jig, wherein the jig has a receiving space of a preset shape; and step 820: providing the mesh body to be embedded in the receiving space The screen body is bent to have a corresponding space a shape; a step 830: coating the resin on the sieve sheet; and a step 840: curing the light resin to retain the predetermined shape after the sieve body is removed.

Taking the manufacture of the screen device 10A as an example, as shown in FIG. 7A, a jig 90 having a receiving space 900 of a predetermined shape is provided; in this embodiment, for example, the accommodating space 900 has a function with the screen device 10A. The bottom corresponds to a rectangular ring shape, such as an annular groove. Furthermore, the second screen body 400 is provided, and the second screen body 400 is bent to surround the corner cylindrical space, and the prototype of the filter unit 100 is formed and embedded in the accommodating space 900.

Then, the second filter mesh 400 is coated with a resin, or the second filter mesh 400 is stained with a resin, and the second filter mesh 400 coated with the resin is light-cured; After the filter sheet 400 autonomous device 90 is detached, it becomes a filter unit 100 having a hollow corner column structure. In addition, a resin can be selectively applied to the second screen body 400, for example, in the end coating/dip resin.

The manufacture of the screen device 10A, as shown in FIG. 7B, further includes providing a first screen body 300, and combining the first screen body 300 and the filter unit 100, wherein the same resin can be combined with the light. A screen body 300 is at the first opening 2010 end of the filter unit 100. The forming of the filter unit 100 and the combination of the first screen body 300 and the filter unit 100 can also be completed at one time, that is, the prototype of the screen device 10 is first formed, and then the resin is cured and cured by light.

The manufacturing method of Figures 6 and 7A-7B is also applicable to the manufacture of other screen devices of the present invention, such as the screening devices 10B, 10C, 11A and 12A. In addition, depending on the structure of the filter device and the combination procedure, the combination can be completed with different fixtures. Further, it will be apparent to those skilled in the art that various modifications, combinations and changes can be made to the manufacturing methods of FIGS. 6 and 7A-7B without departing from the scope of the present invention. For example, the method of FIG. 6 may be adjusted for the screen devices 10a, 10b, and 10c using the jig of FIGS. 7A-7B to assist in manufacturing.

The present invention has been described by the above-described related embodiments, but the above embodiments are merely examples for implementing the present invention. It must be noted that the disclosed embodiments do not limit the scope of the invention. On the contrary, modifications and equivalents of the spirit and scope of the invention are included in the scope of the invention.

10A‧‧‧Filter device

100‧‧‧Filter unit

200‧‧‧ ventilation duct

2010‧‧‧First opening

2020‧‧‧ second opening

300‧‧‧First filter mesh

310‧‧‧ ridge

400‧‧‧Second filter mesh

410‧‧‧ ridge

P1~P5‧‧‧ filter surface

Claims (9)

A filter device for an air filter device, comprising: a filter unit having a ventilation passage extending through the filter unit to have a hollow column structure, wherein the air passage is respectively penetrated through two ends of the filter unit Forming a first opening and a second opening; and a first filter mesh body disposed on the first opening of the filter unit, wherein the filter unit and the first filter mesh body are integrally formed and solidified Three-dimensional filter. The screen device of claim 1, wherein the filter unit has a hollow cylindrical structure, a hollow elliptical column structure or a hollow polygonal column structure. The screen device of claim 1, wherein the filter unit is bent or joined by at least one screen sheet to enclose the air passage. The screen device of claim 3, wherein the at least one filter sheet body is at least one folded screen, and the at least one folded screen is bent or joined into the filter unit in a direction of a fold distribution. The screen device of claim 4, wherein the first filter mesh body is a first fold-shaped filter mesh, wherein a fold-like distribution direction of the first fold-shaped filter mesh is perpendicular to the at least one fold filter The direction of the fold of the net. An air filter device, comprising: the filter device according to any one of claims 1 to 5; and a flow guiding device disposed at the second opening, wherein the flow guiding device guides airflow from the filter An external area of the device flows into the air passage. The air filter device of claim 6, wherein the air flow is filtered through the filter unit and the first filter mesh body into the air passage and flows out from the second opening. A method for manufacturing a filter device, comprising: providing a jig, wherein the jig has a receiving space of a predetermined shape; Providing a filter sheet body having a wrinkle embedded in the receiving space, wherein the filter mesh body is bent to have a shape corresponding to the receiving space; coating the resin on the filter mesh body; and curing the light resin The preset shape is retained after the filter sheet body is taken out from the jig. The method of claim 8, wherein the resin is injected into the accommodating space before the filter mesh body is embedded in the accommodating space, so that the resin is coated on the stencil The embedded end of the screen body.