Air filters and air purifiers containing them

Abstract

An air filter may include a first filter frame in which a plurality of first chambers are formed, a second filter frame in which a plurality of second chambers are formed and disposed rearward of the first filter frame, and filter media housed in the plurality of first chambers and the plurality of second chambers for filtering air, wherein the first filter frame and the second filter frame are disposed such that, when viewed from the front, a center of each of the plurality of second chambers is vertically shifted from a center of each of the plurality of first chambers.

Description

[Technical Field]

[0001] The present invention relates to an air filter and an air purifier including the same. [Background technology]

[0002] In general, an air purifier is a device that sucks in polluted indoor air and purifies it by filtering out dust, odor particles, etc. Such air purifiers can purify indoor air by sucking in polluted air from the surrounding area, purifying it, and then discharging the purified air to the outside of the air purifier.

[0003] Meanwhile, air purifiers may include an air filter that filters out dust, odor particles, etc. contained in the air that flows in. In particular, a deodorizing filter that filters out odor particles, etc. contained in the air, among air filters, is used by filling a filter frame with multiple filter media that filter the flowing air.

[0004] The applicant's Korean Patent Publication No. 10-2018-0005487, "Air Conditioning Air Filter" (Patent Document 1), discloses an air filter that can deodorize air. The air filter in Patent Document 1 has air channels formed in the front frame and rear frame each filled with an adsorbent material, and the air can be filtered by the adsorbent material.

[0005] However, when viewed from the front, the air filter of Patent Document 1 has an overlap between the empty space of the air channel formed in the front frame and the empty space of the air channel formed in the rear frame. That is, an area where no adsorbent material is present is created in either the overlapping front or rear frame. This results in a problem where some of the air passing through this area is not filtered by the adsorbent material, ultimately resulting in a low purification efficiency of the air filter. Furthermore, the area of ​​the overlapping empty space varies depending on the direction in which the air filter is placed relative to the ground. This creates a problem where the purification efficiency of the air filter is not maintained constant if the air filter is rotated or installed accidentally or as needed by the user, or if the purifier itself with the air filter installed rotates.

[0006] Therefore, there is a need for a filter frame that minimizes the loss of air filter purifying efficiency and allows the purifying efficiency to remain constant even when the air filter is rotated without loss of efficiency. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] U.S. Patent Publication No. 2018 / 0221805 Summary of the Invention [Problem to be solved by the invention]

[0008] One embodiment of the present invention has been invented in light of the above-mentioned background, and aims to provide an air filter that can prevent a decrease in the purification efficiency of the air filter by minimizing the flow rate of air that passes through the air filter without being filtered by the filter material.

[0009] Another object of the present invention is to provide an air filter that can maintain constant purification efficiency without decreasing even when the air filter is rotated. [Means for solving the problem]

[0010] According to one aspect of the present invention, an air filter can be provided, comprising: a first filter frame having a plurality of first chambers formed therein; a second filter frame having a plurality of second chambers formed therein and disposed behind the first filter frame; and filter media housed in the plurality of first chambers and the plurality of second chambers for filtering air, wherein the first filter frame and the second filter frame are disposed such that, when viewed from the front, the centers of the respective plurality of second chambers are vertically offset from the centers of the respective plurality of first chambers.

[0011] Furthermore, when the first filter frame is stood vertically on the ground, each of the plurality of first chambers includes a first material space filled with the filter material and a first empty space located above the first material space and where the filter material is absent; when the second filter frame is stood vertically on the ground, each of the plurality of second chambers includes a second material space filled with the filter material and a second empty space located above the second material space and where the filter material is absent; and the first filter frame and the second filter frame can be arranged such that, when viewed from the front with the first filter frame and the second filter frame stood vertically on the ground, at least a portion of the first empty space overlaps with at least a portion of the second material space, and at least a portion of the first material space overlaps with at least a portion of the second empty space.

[0012] Furthermore, the first filter frame and the second filter frame may be arranged such that, when viewed from the front in a state where the first filter frame and the second filter frame are upright vertically on the ground, the second empty space overlaps the first material space and is not exposed to the outside, and when viewed from the rear, the first empty space overlaps the second material space and is not exposed to the outside.

[0013] In addition, an air filter can be provided in which the first filter frame and the second filter frame are arranged so that, when viewed from the front, the center of each of the multiple second chambers is shifted left and right from the center of each of the multiple first chambers.

[0014] The first filter frame and the second filter frame may be arranged such that any one of the plurality of first chambers overlaps a portion of each of the four or more adjacent second chambers.

[0015] Furthermore, when the first filter frame is stood vertically on the ground, each of the plurality of first chambers includes a first material space filled with the filter material and a first empty space located above the first material space and where the filter material is absent; when the second filter frame is stood vertically on the ground, each of the plurality of second chambers includes a second material space filled with the filter material and a second empty space located above the second material space and where the filter material is absent; the first filter frame and the second filter frame can be arranged such that, when the first filter frame and the second filter frame are stood vertically on the ground, at least a portion of the first empty space overlaps with the second material spaces of two second chambers that are shifted above the first chamber among the plurality of second chambers, and at least a portion of the first material space overlaps with the second empty spaces of two second chambers that are shifted below the first chamber among the plurality of second chambers.

[0016] Furthermore, the first chamber and the second chamber may have a square shape of the same size when viewed from the front.

[0017] Furthermore, the first filter frame and the second filter frame may be arranged such that, when viewed from the front, the center of each of the plurality of second chambers is shifted left and right from the center of each of the plurality of first chambers; when viewed from the front in a state in which the first filter frame and the second filter frame are rotated 90° in a direction perpendicular to the front-to-back direction while standing perpendicular to the ground, the second empty space does not overlap with the first material space and is not exposed; and when viewed from the rear, the first empty space does not overlap with the second material space and is not exposed.

[0018] The filter media can be granular.

[0019] According to one aspect of the present invention, there is provided an air purifier including the air filter and a blower that provides a blowing force so that external air passes through the air filter. [Effects of the Invention]

[0020] One embodiment of the present invention has the effect of minimizing the flow rate of air that passes through the air filter without being filtered by the filter material, thereby preventing a decrease in the purification efficiency of the air filter.

[0021] Furthermore, the embodiment of the present invention has the advantage that the purification efficiency is maintained constant without being reduced even when the air filter is rotated. [Brief explanation of the drawings]

[0022] [Figure 1] 1 is a perspective view of an air purifier according to an embodiment of the present invention. [Figure 2] FIG. 2 is an exploded perspective view of the air purifier of FIG. 1. [Figure 3]3 is a perspective view and a partially enlarged view of the air filter of FIG. 2. [Figure 4] 4 is a perspective view of an air filter when a plurality of filter frames of FIG. 3 are provided. [Figure 5] FIG. 5 is an exploded perspective view of the air filter of FIG. 4. [Figure 6] FIG. 6 is an enlarged view of part A in FIG. 5. [Figure 7] FIG. 6 is an enlarged view of part B in FIG. 5. [Figure 8] 5 is a diagram showing a state when a part of the first filter frame and a part of the second filter frame in FIG. 4 overlap each other, as viewed from the front. FIG. [Figure 9] FIG. 9 is a diagram showing the first filter frame and the second filter frame of FIG. 8 rotated by 90°. [Figure 10] 2 is a flowchart sequentially illustrating a method for manufacturing an air filter according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0023] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments for realizing the technical concept of the present invention will be described in detail with reference to the accompanying drawings.

[0024] In the description of the present invention, if it is determined that a specific description of related publicly known configurations or functions may obscure the gist of the present invention, the detailed description will be omitted.

[0025] Additionally, when a component is referred to as being "connected," "supported," or "flowing into" another component, it should be understood that the component may be directly connected to, supported by, or flow into the other component, but that other components may also be present in between.

[0026] The terms used in this specification are merely used to describe specific embodiments and are not intended to limit the present invention. The singular expressions include the plural expressions unless the context clearly indicates otherwise.

[0027] As used herein, the meaning of "comprising" is to embody certain properties, regions, constants, steps, operations, elements and / or components, and does not exclude the presence or addition of other certain properties, regions, constants, steps, operations, elements, components and / or groups.

[0028] In addition, in this specification, the expressions of directions such as up, down, front, and rear are explained based on the illustrations in the drawings, and it should be made clear in advance that they can be expressed differently if the direction of the object changes. Note that the up / down direction, left / right direction, and front / rear direction in this specification may be the directions of the coordinate axes shown in Figures 1 to 9.

[0029] Hereinafter, a specific configuration of an air purifier 1 according to an embodiment of the present invention will be described with reference to the drawings.

[0030] 1 and 2, an air purifier 1 according to an embodiment of the present invention can purify polluted air into clean air by filtering dust, odor particles, etc. from the air that has flowed into the air purifier 1. The air purifier 1 can also draw in outside air and discharge the clean air purified inside to the outside. The air purifier 1 can include a case 10, a blower 20, and an air filter 30.

[0031] The case 10 can support the fan 20 and the air filter 30 and can provide a space for accommodating the fan 20 and the air filter 30. The case 10 can be provided to surround the fan 20 and the air filter 30.

[0032] The fan 20 may be driven to introduce contaminated air outside the air purifier 1 into the air purifier 1. The fan 20 may provide a blowing force so that the introduced air passes through an air filter 30, which will be described later. The fan 20 may also be driven to send the air purified by the air filter 30 inside the air purifier 1 to the outside.

[0033] The air filter 30 can filter the air flowing in from outside the air purifier 1 into clean air. For example, the air filter 30 may be an activated carbon deodorizing filter (carbon filter). The air filter 30 may include a filter frame 100, a filter mesh 200, and a filter medium 300.

[0034] 3, the filter frame 100 can accommodate a filter medium 300 and can be supported by the case 10. The filter frame 100 can include a main body 111 and a separation prevention member 112.

[0035] The main body 111 may be formed with a plurality of chambers 111a each capable of accommodating a filter medium 300 therein.

[0036] The chamber 111a may be a predetermined space at least partially surrounded by the main body 111. Such a chamber 111a may accommodate a plurality of granular filter media 300. For example, if the entire space of the chamber 111a is filled with the filter media 300, the air pressure difference may become high and the purification efficiency may be reduced, so only a portion of the space of the chamber 111a may be filled with the filter media 300.

[0037] The separation prevention member 112 can prevent the filter medium 300 accommodated in the chamber 111a from separating from the chamber 111a. A plurality of such separation prevention members 112 can be provided. Furthermore, the plurality of separation prevention members 112 can extend in the same direction, or, for example, can extend in the vertical direction.

[0038] Both side ends of the plurality of anti-detachment members 112 may be connected to the main body 111, and may be spaced apart so as not to be connected to each other between the side ends. For example, the plurality of anti-detachment members 112 may be spaced apart from each other in the left-right direction. In this case, each anti-detachment member 112 is not connected to other anti-detachment members 112 adjacent to both sides in the left-right direction, and only both side ends in the up-down direction may be supported by the main body 111. Furthermore, the plurality of anti-detachment members 112 may include an injection-moldable material and be integrally connected to the main body 111 by injection molding.

[0039] Furthermore, the separation prevention members 112 may be provided with a spacing between them that is smaller than the minimum width of the granular filter medium 300. As a result, the filter medium 300 accommodated in the chamber 111a can be prevented from escaping to the outside of the chamber 111a by the presence of the separation prevention members 112 and can be accommodated within the chamber 111a.

[0040] 4, a plurality of filter frames 100 may be provided, and the plurality of filter frames 100 may include a first filter frame 110 and a second filter frame 120. Hereinafter, two filter frames 100 will be provided, each including a first filter frame 110 and a second filter frame 120, but this is merely an example, and three or more filter frames 100 may be provided. Note that the reference numerals of the main body 111, the separation prevention member 112, and the chamber 111a described above may be used in the first main body 111, the first separation prevention member 112, and the first chamber 111a, respectively, described below.

[0041] 5 and 6, the first filter frame 110 may be disposed on one side (e.g., the front side in FIG. 5) of the filter mesh 200. The first filter frame 110 may include a first body 111 and a first separation prevention member 112.

[0042] The first body 111 may be provided with a plurality of first chambers 111a each capable of accommodating a filter medium 300 therein.

[0043] The first chamber 111a may be a predetermined space at least partially surrounded by the first body 111. The first chamber 111a may accommodate the filter medium 300. The first chamber 111a may have a rectangular shape, for example. The first chamber 111a may include a first material space 111a-1 and a first empty space 111a-2.

[0044] The first material space 111a-1 may be a space in the first chamber 111a that is filled with the filter material 300 when the first filter frame 110 is vertically erected on the ground. Here, the first material space 111a-1 may be a concept that includes not only the space in the first chamber 111a occupied by the filter material 300 but also minute spaces formed between the filter materials 300.

[0045] The first empty space 111a-2 may be a space in the first chamber 111a where the filter medium 300 is not present when the first filter frame 110 is stood vertically on the ground. Such a first empty space 111a-2 may be provided above the first material space 111a-1 because the filter medium 300 is positioned below the first chamber 111a due to gravity when the first filter frame 110 is stood vertically on the ground.

[0046] In this way, the first material space 111a-1 and the first empty space 111a-2 can be partitioned by the filter material 300. That is, the space in the first chamber 111a can be partitioned into the first material space 111a-1 and the first empty space 111a-2 by the space occupied by the filter material 300 in the first chamber 111a. Furthermore, the first material space 111a-1 can include not only the space occupied by the filter material 300 in the first chamber 111a but also minute spaces formed between the filter materials 300.

[0047] In addition, the space occupied by the first material space 111a-1 and the first empty space 111a-2 in the first chamber 111a can be changed according to the movement of the filter medium 300 due to gravity when the first filter frame 110 rotates.

[0048] The first separation prevention member 112 can prevent the filter medium 300 accommodated inside the first chamber 111a from separating from the first chamber 111a. A plurality of such first separation prevention members 112 can be provided. Furthermore, the plurality of first separation prevention members 112 can extend in the same direction, for example, in the vertical direction.

[0049] Both side ends of the plurality of first separation prevention members 112 may be connected to the first main body 111. For example, the plurality of first separation prevention members 112 may be integrally connected to the first main body 111 by injection molding. Alternatively, the plurality of first separation prevention members 112 may be spaced apart so as not to be connected to each other at both side ends. For example, the plurality of first separation prevention members 112 may be spaced apart from each other in the left-right direction. In this case, each first separation prevention member 112 is not connected to other first separation prevention members 112 adjacent to both sides in the left-right direction, and only both side ends in the up-down direction may be supported by the first main body 111. In other words, a configuration for connecting the first separation prevention members 112 adjacent to each other in the left-right direction can be omitted.

[0050] This allows the multiple first separation prevention members 112 and the first main body 111 to be easily manufactured by injection molding, which has the effect of reducing manufacturing costs. Also, by having the multiple first separation prevention members 112 extend in the same direction and omitting the configuration of connecting them to each other, there is the effect of reducing the differential pressure of air passing through the first filter frame 110.

[0051] Although the above description has been given of the case where the plurality of first separation prevention members 112 extend in the vertical direction, the extending direction is not limited to the vertical direction and may also extend in the horizontal direction as another example. In this case, the plurality of first separation prevention members 112 may be arranged spaced apart in the vertical direction, and only both side ends in the horizontal direction may be supported by the first body 111 without being connected to other first separation prevention members 112 adjacent on both sides in the vertical direction.

[0052] 5 and 7, the second filter frame 120 may be disposed on the other side (e.g., the rear side in FIG. 5) of the filter mesh 200. The second filter frame 120 may include a second body 121 and a second separation prevention member 122.

[0053] The second body 121 may be formed with a plurality of second chambers 121a each capable of accommodating a filter medium 300 therein.

[0054] The second chamber 121a may be a predetermined space at least partially surrounded by the second body 121. The filter medium 300 may be accommodated in the second chamber 121a. For example, the second chamber 121a may have a rectangular shape having the same size as the first chamber 111a. The second chamber 121a may include a second material space 121a-1 and a second empty space 121a-2.

[0055] The second material space 121a-1 may be a space in the second chamber 121a that is filled with the filter material 300 when the second filter frame 120 is vertically erected on the ground. Here, the second material space 121a-1 may be a concept that includes not only the space in the second chamber 121a occupied by the filter material 300 but also minute spaces formed between the filter material 300.

[0056] The second empty space 121a-2 may be a space in the second chamber 121a where the filter medium 300 is not present when the second filter frame 120 is stood vertically on the ground. Such a second empty space 121a-2 may be provided above the second material space 121a-1 because the filter medium 300 is positioned below the second chamber 121a due to gravity when the second filter frame 120 is stood vertically on the ground.

[0057] As described above, the second material space 121a-1 and the second empty space 121a-2 can be partitioned by the filter material 300. That is, the space in the second chamber 121a can be partitioned into the second material space 121a-1 and the second empty space 121a-2 by the space occupied by the filter material 300 in the second chamber 121a. The second material space 121a-1 can include not only the space in the second chamber 121a occupied by the filter material 300 but also minute spaces formed between the filter materials 300. The space occupied by the second material space 121a-1 and the second empty space 121a-2 in the second chamber 121a can change in accordance with the movement of the filter material 300 due to gravity when the second filter frame 120 rotates.

[0058] The second separation prevention member 122 can prevent the filter medium 300 accommodated inside the second chamber 121a from separating from the second chamber 121a. A plurality of such second separation prevention members 122 can be provided. Furthermore, the plurality of second separation prevention members 122 can extend in the same direction, for example, in the left-right direction.

[0059] Both side ends of the plurality of second detachment prevention members 122 may be connected to the second body 121. For example, the plurality of second detachment prevention members 122 may be integrally connected to the second body 121 by injection molding. Alternatively, the plurality of second detachment prevention members 122 may be spaced apart so as not to be connected to each other at both side ends. For example, the plurality of second detachment prevention members 122 may be spaced apart from each other in the vertical direction. In this case, the second detachment prevention members 122 are not connected to other second detachment prevention members 122 adjacent to each other in the vertical direction, and only both side ends in the horizontal direction may be supported by the second body 121. In other words, a configuration for connecting the second detachment prevention members 122 adjacent to each other in the vertical direction can be omitted.

[0060] This allows the multiple second separation prevention members 122 and the second main body 121 to be easily manufactured by injection molding, which has the effect of reducing manufacturing costs. Also, since the multiple second separation prevention members 122 extend in the same direction and a configuration for connecting them to each other is omitted, this has the effect of reducing the differential pressure of air passing through the second filter frame 120.

[0061] Although the above description has been given of the case where the plurality of second separation prevention members 122 extend in the left-right direction, the extending direction is not limited to the left-right direction and may extend in the up-down direction as another example. In this case, the plurality of second separation prevention members 122 may be spaced apart in the left-right direction, and may not be connected to other second separation prevention members 122 adjacent to both sides in the left-right direction, with only both ends in the up-down direction being supported by the second body 121. Meanwhile, the extending direction of the plurality of second separation prevention members 122 may be substantially perpendicular to the extending direction of the plurality of first separation prevention members 112, but is not limited thereto and may be the same direction.

[0062] Meanwhile, the first filter frame 110 and the second filter frame 120 may be configured so that the flow rate of air passing through the air filter 30 is minimized without being filtered by the filter medium 300. For example, the first filter frame 110 and the second filter frame 120 may be arranged so that the center of each of the plurality of first chambers 111a is offset in the vertical and horizontal directions from the center of each of the plurality of second chambers 121a. The following description will be given assuming that the first filter frame 110 and the second filter frame 120 are standing vertically on the ground.

[0063] 8, the first filter frame 110 and the second filter frame 120 may be arranged so that air passing through the air filter 30 passes through the first empty space 111a-1 or the second empty space 121a-1. For example, the first filter frame 110 and the second filter frame 120 may be arranged so that at least a portion of the first empty space 111a-2 overlaps with at least a portion of the second empty space 121a-1, and at least a portion of the first empty space 111a-1 overlaps with at least a portion of the second empty space 121a-2. That is, the first filter frame 110 and the second filter frame 120 may be arranged so that the first empty space 111a-2 and the second empty space 121a-2 do not overlap. In this case, when viewed from the front, the second empty space 121a-2 overlaps with the first empty space 111a-1 and is not exposed to the front. In addition, when viewed from the rear, the first empty space 111a-2 overlaps the second space 121a-1 and is not exposed to the rear. Therefore, air passing through the air filter 30 can be filtered by the filter material 300 filled in the first space 111a-1 or the second space 121a-1.

[0064] In a more detailed example, the first filter frame 110 and the second filter frame 120 may be arranged so that the first chamber 111a overlaps a portion of each of four or more adjacent second chambers 121a. In this case, at least a portion of the first empty space 111a-2 overlaps with the second raw material spaces 121a-1 of two of the second chambers 121a that are shifted above the first chamber 111a. That is, the first empty space 111a-2 overlaps with the two second raw material spaces 121a-1. Also, at least a portion of the first raw material space 111a-1 overlaps with the second raw material spaces 121a-2 of two of the second chambers 121a that are shifted below the first chamber 111a. That is, the first raw material space 111a-1 overlaps with the two second empty spaces 121a-2.

[0065] In this way, the air filter 30 is configured so that the first empty space 111a-2 overlaps with the second material space 121a-1 and the second empty space 121a-2 overlaps with the first material space 111a-1, thereby minimizing the flow rate of air that does not pass through the filter material 300, thereby improving the air filtration efficiency.

[0066] Furthermore, the first chamber 111a and the second chamber 121a of the air filter 30 are formed in a rectangular shape, and the first chamber 111a is configured to overlap four adjacent second chambers 121a. This prevents a decrease in air filtering efficiency even when the air filter 30 is rotated. For example, referring to FIG. 9, even when the first filter frame 110 and the second filter frame 120 are rotated 90 degrees in a direction perpendicular to the front-to-rear direction, the first empty space 111a-2 overlaps with the second material space 121a-1, and the second empty space 121a-2 overlaps with the first material space 111a-1. Therefore, even when the air filter 30 is rotated, no overlap between the first empty space 111a-2 and the second empty space 121a-2 occurs, and the air purification efficiency of the air filter 30 can be maintained without degradation.

[0067] Referring again to FIG. 5, the filter mesh 200 can prevent the filter medium 300 from separating from the first chamber 111a and the second chamber 121a. Such a filter mesh 200 can be disposed between the first filter frame 110 and the second filter frame 120. In other words, a plurality of first chambers 111a can be disposed on one side of the filter mesh 200, and a plurality of second chambers 121a can be disposed on the other side. Such a filter mesh 200 can have holes (not shown) formed therein to allow air to pass through, and can be formed, for example, with a mesh structure. Here, the holes formed in the filter mesh 200 can be smaller than the minimum width of the granular filter medium 300.

[0068] Furthermore, the filter mesh 200 can separate the first chamber 111a and the second chamber 121a so that the filter media 300 filled in the first chamber 111a and the second chamber 121a do not mix. This allows the amount of filter media 300 filled in the first chamber 111a and the second chamber 121a to be maintained even when the air filter 30 rotates. Furthermore, the filter mesh 200 can be connected to the first filter frame 110 and the second filter frame 120 between them.

[0069] The filter material 300 can filter the air flowing from the outside into the air purifier 1 to produce clean air. The filter material 300 can be provided in the form of a plurality of granules, and the filter material 300 can be housed in a plurality of first chambers 111a and a plurality of second chambers 121a. In addition, the filter material 300 can be exposed to the outside through gaps between a plurality of separation prevention members 112.

[0070] The filter medium 300 may be granular and have a predetermined width. Here, granular filter medium 300 refers to particles, and can encompass not only round types but also pellet types. When the granular filter medium 300 is circular, the particle size of the filter medium 300 may be 1.5 mm to 3.5 mm. Furthermore, the minimum and maximum widths of the filter medium 300 may be the same. However, this is merely an example, and the filter medium 300 may be provided in the form of a pellet having a circular cross section with a diameter of 1.5 mm to 3.5 mm and a height of 2.5 mm to 11 mm. In this case, the minimum width of the filter medium 300 may be the diameter of the circular cross section of the pellet. In this specification, the minimum width of the filter medium 300 refers to the width of the filter medium 300 that is the shortest length among the widths of the filter medium 300 on an imaginary line extending in one direction and passing through the center of the filter medium 300. Meanwhile, the filter medium 300 can adsorb and remove pollutants from the air, and may be, for example, activated carbon. However, the filter medium 300 is not limited to this, and any known material capable of adsorbing pollutants may be used.

[0071] In the air filter 30 according to the embodiment of the present invention, the separation prevention member 112 can be easily manufactured together with the main body 111 by injection molding, thereby reducing manufacturing costs and simplifying the manufacturing process.

[0072] In addition, the multiple anti-detachment members 112 are connected to the main body 111 only at both side ends, and the structure for connecting them to each other is omitted, which has the effect of lowering the differential pressure, reducing manufacturing costs, and simplifying the process.

[0073] Furthermore, by having the first and second separation prevention members 112 and 122 extend in directions perpendicular to each other, there is an effect of reducing the differential pressure of air passing through the filter frame 100.

[0074] On the other hand, the air filter 30 is configured so that the first empty space 111a-2 overlaps with the second material space 121a-1 and the second empty space 121a-2 overlaps with the first material space 111a-1, thereby minimizing the flow rate of air that is not filtered by the filter material 300, thereby improving the air filtration efficiency.

[0075] Furthermore, even if the air filter 30 is rotated and positioned, there is no overlap between the first empty space 111a-2 and the second empty space 121a-2, which has the effect of maintaining the air purification efficiency of the air filter 30 without any reduction.

[0076] Hereinafter, with reference to FIG. 10, an air filter manufacturing method S10 for manufacturing the air filter 30 according to an embodiment of the present invention will be described.

[0077] In the air filter manufacturing method S10, an air filter 30 can be manufactured by connecting a filter frame 100 formed by injection molding to a filter mesh 200. The air filter manufacturing method S10 can include a filter frame forming step S100, a filter medium providing step S200, a filter mesh providing step S300, and a connecting step S400.

[0078] In the filter frame forming step S100, the filter frame 100 may be formed by integrally injection molding the main body 111 having the chamber 111a and the plurality of separation prevention members 112. The filter frame 100 formed in the filter frame forming step S100 is injection molded such that both ends of the plurality of separation prevention members 112 are connected to the main body 111. This prevents the filter medium 300 provided in the chamber 111a in the filter medium providing step S300 from separating from the chamber 111a. The filter frame forming step S100 may include a first filter frame forming step S110 and a second filter frame forming step S120.

[0079] In the first filter frame forming step S110, the first body 111 having the first chamber 111a formed therein and the plurality of first separation prevention members 112 may be integrally injection molded together to form the first filter frame 110 by injection molding.

[0080] In the second filter frame forming step S120, the second filter frame 120 in which the second body 121 having the second chamber 121a and the plurality of second separation prevention members 122 are integrally connected may be formed by injection molding.

[0081] Meanwhile, the filter frame 100 formed in the filter frame forming step S100 may include an injection-moldable material, such as polypropylene (PP). The first filter frame 110 and the second filter frame 120 may be formed by injecting an injection-moldable material through an injection molding inlet 113. In the filter frame forming step S100, the filter frame 100 may be injection-molded under a temperature condition of 190°C to 250°C and a pressure condition of 35 bar to 40 bar. The injection time, including the cooling time and the injection time, in the filter frame forming step S100 may be 25 seconds to 35 seconds.

[0082] In the filter medium providing step S200, the filter medium 300 may be provided in the plurality of first chambers 111a, and the filter medium 300 may be provided in the plurality of second chambers 121a.

[0083] In the filter mesh providing step S300, a filter mesh 200 having a mesh structure may be provided.

[0084] In the connecting step S400, the filter mesh 200 can be connected to the first filter frame 110 and the second filter frame 120 between the first filter frame 110 and the second filter frame 120. In the connecting step S400, the filter mesh 200 can separate the first chamber 111a from the second chamber 121a so that the filter medium 300 housed in the first chamber 111a and the filter medium 300 housed in the second chamber 121a do not mix with each other.

[0085] Although each embodiment of the present invention has been described above as a specific example, these are merely examples, and the present invention is not limited thereto and should be construed as having the broadest scope in accordance with the technical ideas disclosed herein. Those skilled in the art may combine / substitute the disclosed examples to implement patterns of shapes not shown as examples, but these would not depart from the scope of the present invention. Furthermore, those skilled in the art may easily modify or change each of the disclosed examples based on this specification, and it is clear that such modifications or changes also fall within the scope of the present invention.

Claims

1. An air filter comprising: a first filter frame having a plurality of first chambers formed therein; a second filter frame having a plurality of second chambers formed therein and disposed rearward of the first filter frame; and a filter medium contained in the plurality of first chambers and the plurality of second chambers for filtering air; The first filter frame and the second filter frame are When viewed from the front, the centers of the second chambers are arranged to be vertically offset from the centers of the first chambers, When viewed from the front, the filter media contained in the plurality of first chambers and the filter media contained in the plurality of second chambers do not overlap, When the first filter frame and the second filter frame are rotated 90° in a direction perpendicular to the front-to-back direction while being stood upright on the ground, the filter media contained in the plurality of first chambers and the filter media contained in the plurality of second chambers do not overlap when viewed from the front. Air passing through the air filter passes through either the filter media in the first chamber or the filter media in the second chamber. Air filter.

2. When the first filter frame is vertically set up on the ground, each of the plurality of first chambers includes a first material space filled with the filter material and a first empty space located above the first material space and not filled with the filter material; When the second filter frame is vertically set up on the ground, each of the plurality of second chambers includes a second material space filled with the filter material and a second empty space located above the second material space and not filled with the filter material, The first filter frame and the second filter frame are 2. The air filter according to claim 1, wherein, when the first filter frame and the second filter frame are viewed from the front while standing vertically on the ground, at least a portion of the first empty space overlaps with at least a portion of the second material space, and at least a portion of the first material space overlaps with at least a portion of the second empty space.

3. The first filter frame and the second filter frame are When the first filter frame and the second filter frame are viewed from the front in a state where they are vertically erected on the ground, the second empty space overlaps the first material space and is not exposed to the outside, 3. The air filter according to claim 2, wherein the first empty space overlaps the second material space and is not exposed to the outside when the first filter frame and the second filter frame are viewed from the rear.

4. The first filter frame and the second filter frame are 2. The air filter according to claim 1, wherein, when viewed from the front, the centers of the second chambers are arranged so as to be offset from the centers of the first chambers in the left-right direction.

5. 5. The air filter according to claim 4, wherein the first filter frame and the second filter frame are arranged such that any one of the plurality of first chambers overlaps a portion of each of the four or more adjacent second chambers.

6. When the first filter frame is vertically set up on the ground, each of the plurality of first chambers includes a first material space filled with the filter material and a first empty space located above the first material space and not filled with the filter material; When the second filter frame is vertically set up on the ground, each of the plurality of second chambers includes a second material space filled with the filter material and a second empty space located above the second material space and not filled with the filter material, The first filter frame and the second filter frame are With the first filter frame and the second filter frame standing vertically to the ground, At least a portion of the first empty space overlaps with second raw material spaces of two second chambers among the plurality of second chambers that are shifted above the first chamber, 6. The air filter according to claim 5, wherein at least a portion of the first material space is arranged to overlap with second empty spaces of two second chambers among the plurality of second chambers that are shifted below the first chamber.

7. 2. The air filter according to claim 1, wherein the first chamber and the second chamber have a square shape of the same size when viewed from the front.

8. The first filter frame and the second filter frame are When viewed from the front, the centers of the second chambers are arranged so as to be shifted in the left-right direction from the centers of the first chambers, When the first filter frame and the second filter frame are rotated 90° in a direction perpendicular to the front-to-back direction while standing vertically on the ground and viewed from the front, the second empty space overlaps the first material space and is not exposed, 4. The air filter according to claim 3, wherein when the first filter frame and the second filter frame are viewed from the rear, the first empty space overlaps the second material space and is arranged so as not to be exposed.

9. 2. The air filter of claim 1, wherein the filter material is granular.

10. An air filter according to any one of claims 1 to 9, The air purifier includes a blower that provides a force for blowing outside air through the air filter.

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