Through hole filtering structure

Abstract

The utility model discloses a through-hole filtering structure, which belongs to the technical field of filters, the through-hole filtering structure comprises filtering sheets and supporting adhesive tapes, the filtering sheets are distributed at intervals in the thickness direction of the filtering sheets, the area between the adjacent filtering sheets is used as a filtering channel, the supporting adhesive tapes are arranged in the filtering channel in parallel and at intervals, and the supporting adhesive tapes are used for supporting the filtering sheets. The supporting rubber strips are connected with the adjacent filtering sheets, and the area between the supporting rubber strips in the same filtering channel serves as a filtering through hole. According to the utility model, the supporting adhesive tape is used as a supporting structure and a fixing structure of the filter sheet, so that the limitation of a corrugated waveform can be avoided, the bonding positions are reduced, the circulation resistance can be reduced, the influence of adhesive on the filtering performance is reduced, and the filtering performance and the yield are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to a through-hole filtering structure. Background Art

[0002] Through-hole filters are generally used to adsorb chemical pollutants. They have a straight flow channel. Compared with ordinary filters, the fluid passing through the through-hole filter can directly penetrate the filter body from the straight flow channel without having to be forced to pass through the medium layer with greater resistance. Therefore, the through-hole filter has the advantages of low resistance and high flow efficiency.

[0003] Currently, the most widely used through-hole filter is the corrugated filter. This type of filter consists of a flat filter layer parallel to the through-holes and a corrugated support layer supporting the flat filter layer. To manufacture a corrugated filter, the material must be pressed and bonded into a single tile. Different parts of the tile are then selectively bonded, stacked, and cured before being cut. This process is complex and leads to low yields.

[0004] In addition, when preparing corrugated filters, the corrugated support layer used can only set the waveform of corresponding size according to the size of the through-hole diameter, and the size of the waveform has strict restrictions. Under normal circumstances, there are more bonding positions between the waveform and the flat filter layer, and relatively more glue is used, resulting in the filter material being covered by the adhesive and losing more performance, thereby affecting the filtration performance and efficiency.

[0005] Therefore, problems such as high resistance, low yield, and complicated process have restricted the large-scale production and application of through-hole filters. How to improve the above problems is a technical problem faced and needed to be solved by those skilled in the art. Utility Model Content

[0006] The purpose of the present utility model is to provide a through-hole filter structure to solve the problems existing in the above-mentioned prior art. The support rubber strip is used as the support structure and fixing structure of the filter sheet, which can eliminate the limitation of the corrugated waveform, reduce the bonding position, and thus reduce the flow resistance, reduce the influence of the glue on the filtering performance, and improve the filtering performance and yield rate.

[0007] To achieve the above purpose, the present invention provides the following solutions:

[0008] The utility model provides a through-hole filtering structure, comprising a filter sheet and a supporting rubber strip, wherein the filter sheet is spaced apart in the thickness direction thereof, and the area between adjacent filter sheets serves as a filtering channel, and the supporting rubber strips are arranged in parallel and spaced apart in the filtering channel, and the supporting rubber strips connect adjacent filter sheets, and the area between the supporting rubber strips in the same filtering channel serves as a filtering through hole.

[0009] Preferably, the supporting rubber strips are arranged at the same position on both the front and back sides of the filter sheet, and the filter through holes of adjacent filter channels are aligned and distributed.

[0010] Preferably, the supporting rubber strips are arranged at different positions on the front and back sides of the filter sheet, and the filter through holes of adjacent filter channels are staggered.

[0011] Preferably, the filter sheet material is at least one of filter paper containing an adsorbent, non-woven fabric, carbon cloth, foam, electret film, and polymer-covered electrode sheet.

[0012] Preferably, the supporting rubber strip is made of at least one of EVA, EPDM, and PO hot-melt polymer materials.

[0013] Preferably, the filter sheets corresponding to the different filter through holes are made of a whole filter sheet, and openings are formed on the filter sheet, and the openings cooperate with the filter sheet to form the filter through holes.

[0014] Preferably, it includes a bending line, which is located on both sides of the opening, and the bending line is a discontinuously connected dotted line or a continuously set indentation line.

[0015] Preferably, it includes auxiliary strips and filter sheets, the auxiliary strips are arranged in parallel, the filter sheets are spaced apart in the length direction of the auxiliary strips and bonded to the auxiliary strips, the auxiliary strips are bent to form a through-hole filter structure, and the area enclosed by the auxiliary strips and the filter sheets serves as the opening.

[0016] Preferably, the auxiliary strip is made of at least one of paper, non-woven fabric, polymer mesh, film, and foam.

[0017] Compared with the prior art, the utility model has achieved the following technical effects:

[0018] The utility model uses supporting rubber strips as the supporting structure and fixing structure of the filter sheet. By reasonably setting the spacing between the supporting rubber strips, it can cooperate with the filter sheet to form filtering holes. Compared with traditional through-hole filters (vertical corrugations), the through-hole filters prepared by the utility model have the advantages of small glue application amount and lower structural resistance. Under the same specifications and the same resistance, the effective mass transfer area between the filter sheet and the air is increased, and the filtration efficiency is improved. That is, the utility model can eliminate the limitations of the corrugated waveform, reduce the bonding position, and thus reduce the flow resistance, reduce the influence of the glue on the filtration performance, and improve the filtration performance and yield rate.

[0019] Other technical solutions included in this utility model can also achieve the following technical effects:

[0020] The utility model punches the sheet material or uses the auxiliary strip to assist, and uses the change of the bending modulus to guide the material to bend naturally at the desired bending position when receiving the wave, so that the supporting rubber strip plays a supporting and bonding role, thereby forming a processing method for forming a through-hole filter. The use of the above processing method can facilitate the implementation of the technical solution of the utility model and ultimately improve the yield rate.

[0021] The preparation of traditional through-hole filters (vertical corrugations) requires multiple steps, including pressing single tiles → gluing and stacking → curing → slitting. In particular, the cutting step uses friction cutting with a toothless belt knife, which easily causes hair to be pulled from the cross section, resulting in high resistance and low yield of the finished product. The present invention does not involve many of the steps of traditional through-hole filters. The prepared through-hole filter has the advantages of a short process, low cost, simple process, and a high degree of automation. Furthermore, by using shearing rather than friction cutting to cut the single piece, the cross section of the finished product is smooth and not prone to hair, further reducing the resistance of the finished filter. The present invention has a small amount of glue and avoids hair pulling during cutting, resulting in a high yield and low structural resistance.

[0022] The utility model solves the problems of difficult cutting and complicated process steps when using sheet materials to make through-hole filters. It can improve the manufacturing process of the barrier-free filter in the existing technology, expand the use of the commonly used gluing-wave collecting process of the barrier-free filter, and can transform the existing barrier-free filter production line into a through-hole filter production line by making a minor modification. The process is mature and reliable, and can efficiently produce through-hole filters.

[0023] Due to the properties of the hot melt adhesive lines, the resulting product is inherently flexible. Staggered adhesive application on the front and back surfaces can further enhance the product's flexibility. Compared to existing through-hole filters (vertical corrugated), this new through-hole filter offers lower resistance and greater flexibility, making it easier to bend. This also addresses the issue of reduced filtration efficiency when bending conventional through-hole filters.

[0024] Traditional IFD dust collector plates (plastic corrugated board) have high ventilation resistance due to material selection issues. The production process requires printing, stacking, and cutting with electric heating wires, which is a cumbersome process. Uneven heating during the electric heating wire cutting process can cause material warping, low yield, and slow production. Compared to traditional IFD dust collector plates, the new one offers advantages such as low warping resistance, high yield, low structural resistance, a simplified molding process, simple processing, low cost, and high automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. 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 these drawings without paying any creative work.

[0026] Figure 1 This is a schematic diagram of a substrate formed by stamping process of the utility model;

[0027] Figure 2 for Figure 1 Schematic diagram of the staggered gluing method on the front and back sides;

[0028] Figure 3 This is a schematic diagram of a substrate formed by pasting processing according to the utility model;

[0029] Figure 4 for Figure 3 Schematic diagram of the staggered gluing method on the front and back sides;

[0030] Figure 5 To adopt Figure 1 or Figure 3 Schematic diagram of the substrate receiving process of the glue coating method;

[0031] Figure 6 To adopt Figure 2 or Figure 4 Schematic diagram of the substrate receiving process of the glue coating method;

[0032] Figure 7 for Figure 5 a schematic diagram of the finished product;

[0033] Figure 8 for Figure 6 a schematic diagram of the finished product;

[0034] Among them, 1. filter sheet; 2. support rubber strip; 3. opening; 4. bending line; 5. auxiliary strip; 6. filter through hole. DETAILED DESCRIPTION

[0035] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0036] The purpose of the utility model is to provide a through-hole filter structure to solve the problems existing in the prior art. The support rubber strip is used as the support structure and fixing structure of the filter sheet, which can eliminate the limitation of the corrugated waveform, reduce the bonding position, and thus reduce the flow resistance, reduce the influence of the glue on the filtering performance, and improve the filtering performance and yield rate.

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0038] like Figures 1 to 8 As shown, the utility model provides a through-hole filter structure, including a filter sheet 1 and a supporting rubber strip 2. The filter sheet 1 has the function of adsorbing pollutants from the fluid flowing through its surface. The filter sheet 1 can be processed with known materials. In order to improve the mass transfer efficiency, the filter sheet 1 can be pressed into corrugations or other forms to improve the airflow disturbance. The supporting rubber strip 2 itself has a certain spatial shape. Through the setting of the supporting rubber strip 2, it can be connected to the filter sheet 1 and can be combined with the filter sheet 1 to form a filter through hole 6. Specifically, the filter sheets 1 are spaced apart in the thickness direction to form a parallel plate structure, and there is a corresponding spacing between the filter sheets 1, which is called the interlayer spacing; the depth of the filter through-hole 6 is called the thickness of the through-hole filter structure; the size of the interlayer spacing matches the width of the filter through-hole 6 along the length direction of the substrate, and the thickness of the through-hole filter structure matches the size of the filter sheet 1 in the depth direction of the filter through-hole 6; it should be noted that: the size of the filter through-hole 6 cannot be expanded indefinitely, otherwise it will affect the filtering effect, and it cannot be too small, otherwise it will increase the resistance of the fluid through the filter through-hole 6, and the thickness of the through-hole filter structure cannot be too small, otherwise it will affect the filtering effect, and it cannot be expanded indefinitely, otherwise it will increase the resistance of the fluid through the filter through-hole 6; therefore, it is necessary to reasonably design the size of the filter through-hole 6 through experiments or simulations. The area between adjacent filter sheets 1 serves as a filter channel, which is used for fluid flow and allows the fluid to flow through the filter sheet 1. The support strips 2 are arranged in parallel and at intervals in the filter channel to separate the filter channel. Thus, the support strips 2 connect adjacent filter sheets 1, and the area between the support strips 2 in the same filter channel forms a filter through-hole 6, that is, the filter channel is divided into multiple filter through-holes 6, and each filter through-hole 6 forms a unit for fluid filtration.

[0039] The utility model uses the supporting rubber strips 2 as the supporting structure and fixing structure of the filter sheet 1. By reasonably setting the spacing between the supporting rubber strips 2, it can cooperate with the filter sheet 1 to form a filter through-hole 6. Compared with the traditional through-hole filter (vertical corrugation), the through-hole filter prepared by the utility model has the advantages of small glue application amount and lower structural resistance. Under the same specifications and the same resistance, the effective mass transfer area between the filter sheet 1 and the air is increased, and the filtration efficiency is improved. That is, the utility model can eliminate the limitation of the corrugated waveform, reduce the bonding position, and thus reduce the flow resistance, reduce the influence of the glue on the filtration performance, and improve the filtration performance and yield rate.

[0040] Combine Figure 1 、 Figure 3 、 Figure 5 and Figure 7As shown, the support strip 2 can be set at the same position on both sides of the filter sheet 1. When the filter sheet 1 is bent, the same position on both sides of the filter sheet 1 is bonded, thereby forming a filter sheet as shown in FIG. Figure 7 In the finished product shown, the filter holes 6 of adjacent filter channels are aligned and arranged in a straight line along the length of the substrate. With this structure, the shape of the filter holes 6 is essentially fixed. Therefore, the overall deformation capability of the filter structure is comparable to that of existing corrugated filter structures, and it lacks the flexibility to achieve flexible bending. However, the support strips 2 can be positioned appropriately to meet specific requirements, thereby forming narrow and elongated filter holes 6, reducing resistance and ensuring flow and filtration efficiency.

[0041] Combine Figure 2 、 Figure 4 、 Figure 6 and Figure 8 As shown, the support rubber strips 2 can be set at different positions on the front and back sides of the filter sheet 1. The dotted line in the figure represents the support rubber strips 2 on the back side. For example, a row in the length direction of the substrate is set on the front side, and the adjacent rows are set on the back side. When the product is receiving waves, the front rubber lines are bonded to each other, and the back rubber lines are bonded to each other, thereby forming a surface as shown in FIG. Figure 8 In the finished product shown, the filter holes 6 of adjacent filter channels are staggered, with the multiple filter holes 6 arranged in a zigzag pattern along the length of the substrate. In this structure, the support strips 2 to which the filter holes 6 are connected are not fixed relative to the support. Therefore, the filter holes 6 can expand and deform in a diamond-like shape, allowing the filter structure to achieve relatively flexible bending deformation, further improving the product's flexibility and, consequently, its structural adaptability.

[0042] Furthermore, the filter sheet 1 can be made of at least one of filter paper containing adsorbent, non-woven fabric, carbon cloth, foam, electret film, and polymer-covered electrode sheet, and can be set up by mixing multiple materials. The free combination of the above-listed materials belongs to the adaptive adjustment made by those skilled in the art, and should all be within the scope of this application. It should be noted that: for sheet materials such as fabrics, non-woven fabrics, paper, and films made of materials with ferroelectric properties or materials that obtain electret properties through post-processing, the products obtained by the processing method described in this utility model or the processing obtained by the present utility model can be applied to dust collecting electrodes due to their characteristics, and are also within the scope of protection of this utility model. In addition, for electrode plates covered with insulating polymers, the dust collecting electrodes obtained by performing the processing described in this utility model on the electrode plates are also within the scope of protection of this utility model.

[0043] The supporting strip 2 can be made of at least one of EVA, EPDM, and PO hot-melt polymer materials, and can be mixed with multiple materials. Similarly, the free combination of the above-mentioned materials is an adaptive adjustment made by those skilled in the art and should be within the scope of this application.

[0044] In the prior art, when bonding the vertical corrugated corrugated layer to the flat layer, an adhesive must be applied, and the adhesive covers the surface of the material, causing it to lose its adsorption capacity, resulting in the performance of this position being invalid, and the vertical corrugation has a large bonding density, resulting in a larger failure area. In the parallel plate structure of the present invention, the glue bonding area accounts for a small proportion, that is, the area that fails due to adhesive covering accounts for a small proportion. Under the same sheet thickness and the same opening rate, the vertical corrugation has a higher proportion of invalid area than the present invention. It can be seen that when turbulence is not involved, the present invention is superior to the vertical corrugation in the prior art. In addition, in terms of creating turbulence, there are fewer ways to apply vertical corrugation, while the present invention can more flexibly adjust the shape of the stamped single sheet to achieve the goal of increasing turbulence and improving efficiency, and the potential and subsequent adjustment space are also better than vertical corrugation. In summary, the filtration efficiency of the present invention is better than that of vertical corrugation under the same specifications, the same materials and the same resistance.

[0045] Recombination Figures 1 to 8 As shown, the present invention also provides a method for preparing a through-hole filter structure, which can adopt the through-hole filter structure described above to prepare the through-hole filter structure described above, and specifically includes the following contents:

[0046] Prepare a substrate. The substrate is a sheet-like, long strip of material that can be bent later to form a through-hole filter structure. When preparing the substrate, it is necessary to machine the openings 3 into the substrate, or to form the openings 3 during the substrate preparation process. The former can be formed by stamping, while the latter can be formed by splicing / lap forming. The prepared substrate has openings 3 distributed in a matrix. Along the length of the substrate, at least the substrate on both sides of the openings 3 serves as the filter sheet 1. After bending, the filter sheet 1 can serve as the wall surface of the filter through-hole 6 for filtration.

[0047] The support strip 2 is applied parallel to the length of the substrate and, after bending, parallel to the axial direction of the filter holes 6, i.e., the thickness direction of the through-hole filter structure. A first region is defined between adjacent openings 3 along the width of the substrate, and a second region is defined between adjacent openings 3 along the length of the substrate. The support strip 2 is located at the intersection of the first and second regions.

[0048] The supporting rubber strip 2 is pre-cooled to ensure the strength and stable size of the supporting rubber strip 2 .

[0049] The supporting rubber strip 2 is reheated and the substrate is wave-received. When receiving the wave, the substrate needs to be bent alternately forward and backward to form a waveform. After the wave is received, the substrate, the filter sheet 1 and the opening 3 form a filter through hole 6.

[0050] like Figure 1 and Figure 2 As shown, the substrate can be a whole sheet of filter material 1, with openings 3 formed in the filter material 1 by punching, laser cutting, wire cutting, or other processing methods. Punching and shearing are preferred. Improving the filter material 1 by forming more openings 3 to assist in wave shaping, reduce resistance, and increase the exposed area of ​​the sheet material is a conventional improvement to the structure of the present invention and should be included within the scope of protection of the present invention.

[0051] In a further embodiment, bend lines 4 can be fabricated. Bend lines 4 are located on either side of opening 3 along the length of the substrate. Note that bend lines 4 are parallel to the width of the substrate. When receiving the substrate, the substrate can be bent along bend lines 4, facilitating precise bending at defined locations, thereby ensuring and improving the yield of the through-hole filter structure. More specifically, bend lines 4 can be intermittently connected dashed lines, or continuous indented lines.

[0052] like Figure 3 and Figure 4 As shown, the substrate may include auxiliary strips 5 and a filter sheet 1. In this case, the filter sheet 1 is a cut strip-shaped sheet, unlike the previously described whole sheet, and requires splicing / overlapping with the auxiliary strips 5. During substrate preparation, the auxiliary strips 5 are arranged in parallel. The number and length of the auxiliary strips 5 are selected based on the required width of the through-hole filter structure, and the spacing between the auxiliary strips 5 is determined based on the required size of the filter holes 6. The filter sheets 1 are spaced and bonded to the auxiliary strips 5 along their lengths, with the spacing between the filter sheets 1 set based on the required size of the filter holes 6. The area enclosed by the arranged auxiliary strips 5 and the filter sheet 1 serves as the opening 3, completing the preparation of the substrate. Improvements such as forming more openings 3 in the filter sheet 1 by combining the auxiliary strips 5 with the filter sheet 1 to assist in wave shaping, reduce resistance, and increase the exposed area of ​​the sheet material are standard improvements to the structure of the present invention and should be included in the technical solution of the present invention.

[0053] Furthermore, the auxiliary strip 5 can be made of at least one of paper, non-woven fabric, polymer mesh, film, and foam, and can be made of a mixture of multiple materials. The free combination of the above-listed materials is an adaptive adjustment made by technical personnel in this field and should be within the scope of this application.

[0054] According to the above description, the present invention provides the following specific embodiments that can be implemented:

[0055] Example 1:

[0056] The processing flow can be divided into: 1 stamping → 2 gluing → 3 pre-cooling, reheating → 4 receiving

[0057] 1. Stamping:

[0058] A rolled sheet material (the sheet material itself can be used as a filter sheet 1, i.e., it can perform a filtering function) is stamped into a substrate having openings 3. Without considering the thickness of the sheet material itself, the corresponding dimension of the openings 3 in the length direction of the sheet material (i.e., the substrate) must be greater than or equal to the interlayer spacing of the through-hole filter to be prepared, that is, the dimension of the openings 3 in this direction must be greater than or equal to the height of the filter holes 6 in the through-hole filter to be prepared. To make the sheet material easier to bend when receiving waves, it is also necessary to press intermittently connected dotted lines as bending lines 4 during the stamping process. The two bending lines 4 on either side of the same opening 3 form a group. The distance between the dotted lines within a group is the interlayer spacing of the through-hole filter to be prepared, and the distance between groups is the thickness of the through-hole filter to be prepared.

[0059] The size of the opening 3 in the width direction of the sheet material is the width of each filtering through hole 6 of the through-hole filter to be manufactured.

[0060] 2. Gluing:

[0061] Apply glue to the substrate after stamping, apply glue intermittently, and the glue application position can refer to Figure 1 and Figure 2 As shown, glue is applied to both sides, but two methods are used: one is to apply glue evenly to corresponding locations on both sides, and the other is to apply glue intermittently and staggered. This glue application forms glue lines, which, when bonded, form support strips 2. Support strips 2 support and secure the through-hole filter. The height of support strips 2 (or the thickness of the glue applied) needs to be slightly higher than half the desired interlayer spacing of the through-hole filter. The overlapping glue lines on both sides, when squeezed to a certain degree, reach the interlayer width, thus achieving a secure bond.

[0062] 3. Pre-cooling and reheating:

[0063] The purpose of pre-cooling the glue line is to obtain dimensional stability and strength during this process, and reheating is to give the glue line surface the ability to bond to each other, making it easier to bond to each other during the wave receiving process.

[0064] 4. Receive wave:

[0065] refer to Figure 5 and Figure 6 , when receiving the wave, a positive and negative bending waveform is formed. It should be noted that, Figure 5 and Figure 6The support strip 2 shown is only a schematic location and does not represent the specific structure and size. Because the bending modulus of the sheet material is greatly weakened at the punched dotted line position (bend line 4), it will bend at the dotted line position during wave reception, so the wave reception can proceed as expected.

[0066] Example 2:

[0067] The processing flow can be divided into: 1. Auxiliary strip gluing and pulling → 2. Pasting sheet materials → 3. Gluing → 4. Precooler and reheating → 5. Wave receiving

[0068] 1. Gluing and traction of auxiliary strips:

[0069] Tissue paper, polymer film, net and other materials with high tensile strength but low bending modulus are selected as auxiliary strips 5, which are coated with glue and pulled so that they can be adhered and fixed to the sheet material (as the filter sheet 1).

[0070] 2. Paste sheet materials:

[0071] Glue the long strips of sheet material to the glue-coated auxiliary strip 5 at equal intervals. Without considering the thickness of the auxiliary strip 5, glue, and sheet material itself, the length of the sheet material is the width of the through-hole filter, the width of the sheet material is the thickness of the through-hole filter, and the distance between the sheets is the interlayer spacing of the through-hole filter.

[0072] 3. Gluing and gluing:

[0073] Glue coating position reference Figure 3 and Figure 4 As shown, glue is applied on both the front and back sides, but two methods of gluing are distinguished: one is to apply glue on the corresponding positions of the front and back sides, and the other is to apply glue on the front and back sides in a staggered manner, and the gluing is intermittent. The function of the glue line is to support and fix the filter. After gluing, a glue line is formed, and after the glue line is bonded, a supporting rubber strip 2 is formed. The function of the supporting rubber strip 2 is to support and fix the through-hole filter. The height of the supporting rubber strip 2 (or the thickness of the glue coating) needs to be slightly higher than half of the interlayer spacing of the through-hole filter to be produced. After the glue lines on both sides overlap each other and are squeezed to a certain extent, they reach the width of the interlayer spacing, thereby achieving a firm bond.

[0074] 4. Pre-cooling and reheating: The purpose of pre-cooling the glue line is to obtain dimensional stability and strength in this process, and reheating is to give the glue line surface the ability to bond to each other, so as to facilitate mutual bonding during the wave receiving process.

[0075] 5. Receive wave:

[0076] refer to Figure 5 and Figure 6 , when receiving the wave, a positive and negative bending waveform is formed. It should be noted that, Figure 5 and Figure 6The support strips 2 shown are for illustrative purposes only and do not represent specific structural dimensions. Because the flexural modulus of the auxiliary strips 5 is very low, compared to the larger flexural modulus at the locations where the sheet material is attached, bending during wave reception occurs at locations where the sheet material is not attached. The support strips 2 formed by the adhesive lines also expand the interlayer spacing, thereby creating a through-hole filter.

[0077] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A through-hole filter structure, characterized in that: It includes filter sheets and supporting strips, the filter sheets are spaced apart in the thickness direction, the areas between adjacent filter sheets serve as filter channels, the supporting strips are arranged in parallel and spaced apart in the filter channels, the supporting strips connect adjacent filter sheets, and the areas between the supporting strips in the same filter channel serve as filter through holes.

2. The through-hole filter structure according to claim 1, wherein: The supporting rubber strips are arranged at the same position on both the front and back sides of the filter sheet, and the filter through holes of adjacent filter channels are aligned and distributed.

3. The through-hole filter structure according to claim 1, wherein: The supporting rubber strips are arranged at different positions on the front and back sides of the filter sheet, and the filter through holes of adjacent filter channels are staggered.

4. The through-hole filter structure according to claim 1, wherein: The filter sheet material is any one of filter paper containing adsorbent, non-woven fabric, carbon cloth, foam, electret film, and polymer-covered electrode sheet.

5. The through-hole filter structure according to claim 1, wherein: The supporting rubber strip is made of any one of EVA, EPDM and PO hot-melt polymer materials.

6. The through-hole filter structure according to claim 1, wherein: The filter sheets corresponding to the different filter through holes are made of a whole filter sheet, and openings are formed on the filter sheet. The openings cooperate with the filter sheet to form the filter through holes.

7. The through-hole filter structure according to claim 6, wherein: It includes bending lines, which are located on both sides of the opening and are discontinuously connected dotted lines or continuously set indentation lines.

8. The through-hole filter structure according to claim 6, wherein: It includes auxiliary strips and filter sheets, the auxiliary strips are arranged in parallel, the filter sheets are spaced apart in the length direction of the auxiliary strips and bonded to the auxiliary strips, the auxiliary strips are bent to form a through-hole filter structure, and the area enclosed by the auxiliary strips and the filter sheets serves as the opening.

9. The through-hole filter structure according to claim 8, wherein: The auxiliary strip is made of any one of paper, non-woven fabric, polymer net, film, and foam.

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