Composite filter, air purifier including the same, and method for manufacturing the composite filter

Abstract

The composite filter includes a filter unit that filters air and includes a filter member having a plurality of filtering sections whose sides are rotatably connected to each other; one or more filter modules arranged side by side with at least one of the plurality of filtering sections; and a bracket that supports adjacent filtering sections and the filter module together so that adjacent filtering sections among the plurality of filtering sections are rotatable with respect to each other, the bracket including folding sections that are selectively folded by relative rotation of adjacent filtering sections, and a plurality of mounting sections that are respectively connected to the folding sections across the folding sections and attached to the sides of the adjacent filtering sections, the folding sections and the mounting sections being integral with each other and made of a flexible material, and the mounting sections extending to the sides of the adjacent filter modules to seal gaps between the filtering sections and the filter modules.

Description

[Technical Field]

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

[0002] Generally, an air purifier is a device that draws in polluted indoor air and purifies it by filtering out dust, odor particles, etc. Air purifiers draw in polluted air from the surrounding area, purify it, and then discharge the purified, clean air outside the air purifier, thereby purifying the indoor air.

[0003] Meanwhile, an air purifier may include a filter that filters dust, odor particles, etc. contained in the air that flows into the air purifier. The filter may have various shapes depending on the type of air purifier. For example, the filter may be provided in a cylindrical shape, a rectangular parallelepiped shape, etc.

[0004] However, filters of the above-mentioned shape occupy a relatively large volume during transportation, which results in high costs for transporting the filters. In addition, in recent years, the demand for large-area filters to purify the air in large spaces has increased, and the volume that filters occupy during transportation has gradually increased. Therefore, filters that reduce the volume of filters during transportation have been developed.

[0005] The applicant's U.S. Patent Publication No. 2018 / 0221805, titled "Air Purifier," and Blueair AB's U.S. Patent Publication No. 2018 / 0304184, titled "Foldable Air Filter Unit," disclose foldable filters that can reduce the volume of the filter when transported. However, conventional foldable filters require a complex hinge structure for folding, and a complex structure or separate adhesive is used to connect the filter to the support (frame), which complicates the structure and manufacturing process of the foldable filter and increases the manufacturing costs of the foldable filter.

[0006] Furthermore, in the case of a composite filter that combines a dust-collecting filter that filters out dust with a functional filter such as a deodorizing filter, a structure is required to seal the gap between the two stacked filters to prevent air from leaking. However, if a hinge structure that is structurally difficult to seal is applied to a composite filter, a separate sealing member must be added, which complicates the manufacturing process and increases the overall manufacturing cost, which is undesirable.

[0007] Therefore, there is a need for a foldable composite filter that has a simple structure, which can simplify the manufacturing process and reduce manufacturing costs. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] US Patent Application Publication No. 2018 / 0221805 [Patent Document 2] US Patent Application Publication No. 2018 / 0304184 Summary of the Invention [Problem to be solved by the invention]

[0009] The present invention has been made in view of the above background, and provides a foldable composite filter that can secure a large filtration area to filter a large amount of air and can reduce the volume during transportation.

[0010] Furthermore, the present invention provides a composite filter that can be used for a long period of time by simplifying the structure of the folding composite filter and improving the durability of the filter.

[0011] Furthermore, the present invention provides a composite filter that can reduce the time and cost required to manufacture a folding composite filter by simplifying the filter structure. [Means for solving the problem]

[0012] According to one aspect of the present invention, there is provided a composite filter including: a filter unit including a filter member that filters air and has a plurality of filtering sections whose sides are connected to each other so that they can rotate relative to each other; one or more filter modules arranged side by side with at least one of the plurality of filtering sections; and a bracket that supports the adjacent filtering sections and the filter module together so that adjacent filtering sections among the plurality of filtering sections can rotate relative to each other, wherein the bracket includes a folding section that is selectively folded by relative rotation of the adjacent filtering sections, and a plurality of mounting sections that are respectively connected to the folding section across the folding section and attached to the sides of the adjacent filtering sections, the folding section and the mounting sections being formed integrally with each other and being made of a flexible material, and the mounting sections extending to the sides of the adjacent filter modules to seal gaps between the filtering sections and the filter modules.

[0013] Also provided is a composite filter in which the number of the plurality of filtering sections is three or more, and when the plurality of filtering sections are rotated relative to each other so that each of the plurality of filtering sections forms an angle with the adjacent filtering section that is smaller than a straight angle, the plurality of filtering sections are arranged along a loop-shaped path.

[0014] Also, a composite filter may be provided in which the plurality of filtering units are an even number.

[0015] Also, a composite filter is provided in which the plurality of filtering sections can be rotated relative to each other so that at least two adjacent filtering sections are arranged in parallel.

[0016] In addition, the filter module may include an air purification member for filtering air and a module frame supporting the upper and lower sides of the air purification member, and a composite filter having a protrusion formed on at least one of both sides of the air purification member.

[0017] The bracket has a recess corresponding to at least a part of the protrusion, and a composite filter having an attachment surface that is attached to a side surface of the air purification member is provided.

[0018] Also provided is a composite filter, wherein the filter unit further includes a filter frame having a support portion that supports the upper or lower side of the filtering portion, and the composite filter further includes a connecting member attached to the upper or lower side of the support portion and the module frame, the connecting member being arranged adjacent to each other so as to seal a gap between the support portion and the module frame.

[0019] Also provided is a composite filter in which the filter module includes a corrugated filter.

[0020] Also provided is an air purifier including a composite filter and a blower that provides a blowing force to cause outside air to pass through the composite filter.

[0021] Also provided is a composite filter manufacturing method including: a laminate substrate providing step of providing a laminate substrate in which a filter unit substrate and a filter module substrate are stacked; a filter module cutting step in which a cutter of the filter manufacturing apparatus moves along an imaginary cutting line extending in a thickness direction of the laminate substrate to cut the filter module substrate into a plurality of filter modules; a filter unit cutting step in which, after the filter module cutting step, the cutter moves along the cutting line between the plurality of filter modules to cut the filter unit substrate to a depth smaller than the thickness of the filter unit substrate; and a bracket attaching step in which brackets are attached to side surfaces of the filtration units and the filter modules arranged adjacent to each other, wherein the filter units including the plurality of filtration units and the plurality of support units are formed from the filter unit substrate through the filter unit cutting step. [Effects of the Invention]

[0022] According to an embodiment of the present invention, for example, the volume of a composite filter in which a dust collection filter and a deodorizing filter are combined can be reduced, thereby reducing the cost of transporting the filters.

[0023] In addition, the structure of the folded composite filter can be simplified, which has the effect of reducing the manufacturing cost. [Brief explanation of the drawings]

[0024] [Figure 1] 1 is a perspective view showing an air purifier according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a cross-sectional view taken along line II-II in FIG. [Figure 3] FIG. 3 is a partial perspective view of the composite filter shown in FIG. 2. [Figure 4] FIG. 4 is a rear perspective view of FIG. 3. [Figure 5] FIG. 4 is an exploded perspective view of FIG. 3. [Figure 6]FIG. 3 is a perspective view of the composite filter in FIG. 2, with the connecting member omitted. [Figure 7] FIG. 3 is a perspective view of the composite foiler of FIG. 2. [Figure 8] FIG. 8 is an exploded perspective view of FIG. 7. [Figure 9] FIG. 8 is a perspective view of the composite filter of FIG. 7 in a folded state. [Figure 10] FIG. 10 is a perspective view showing a composite filter according to a second embodiment of the present invention. [Figure 11] 1 is a conceptual diagram illustrating a process for manufacturing a composite filter according to the present invention. [Figure 12] 1 is a flow chart illustrating a process for manufacturing a composite filter according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0025] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments for embodying the technical concept of the present invention will be described in detail with reference to the accompanying drawings.

[0026] In describing the present invention, if it is determined that a detailed description of related known structures or functions may obscure the gist of the present invention, the detailed description will be omitted.

[0027] Furthermore, 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 flowing into the other component, but that there may also be other components intervening between them.

[0028] The terms used in this specification are used only to describe specific embodiments and are not intended to limit the present invention. The singular expressions include the plural expressions unless otherwise clearly indicated in the context.

[0029] Furthermore, terms including ordinal numbers such as "first," "second," etc. may be used to describe various components, but the components are not limited by these terms. These terms are used only to distinguish one component from another.

[0030] The term "comprising" as used in the specification embodies certain properties, regions, integers, steps, operations, elements and / or components, and does not exclude the presence or addition of other certain properties, regions, integers, steps, operations, elements, components and / or groups.

[0031] Furthermore, it should be made clear in advance that the expressions of directions such as "upper" and "lower" in this specification are explained based on those shown in the drawings, and may be expressed differently if the direction of the object is changed. Meanwhile, the up and down directions in this specification may be based on the up and down directions in Figures 3 to 10.

[0032] The specific configuration of the air purifier 1 according to the first embodiment of the present invention will be described below with reference to the drawings.

[0033] 1 and 2, the air purifier 1 according to the first embodiment of the present invention can purify polluted air into clean air by filtering dust, odor particles, etc. from the air that flows into the air purifier 1. The air purifier 1 can also draw air from outside the air purifier into the air purifier and discharge the clean air purified inside to the outside. The air purifier 1 includes a body 10, a blower 20, and a composite filter 30.

[0034] The body part 10 may support the blower 20 and the composite filter 30 and may provide a space for accommodating the blower 20 and the composite filter 30. The body part 10 may include a case that surrounds the blower 20 and the composite filter 30.

[0035] The blower 20 can be driven to draw air present outside the air purifier 1 into the air purifier 1. The blower 20 can provide airflow so that the drawn-in air passes through the composite filter 30. The blower 20 can also be driven to blow air purified by the composite filter 30 disposed inside the air purifier 1 to the outside. For example, the blower 20 may be disposed below the body 10 or inside the composite filter 30.

[0036] 3 to 5, the composite filter 30 can filter air introduced from outside the air purifier 1 to produce clean air. For example, it can filter dust, odor particles, etc. from the air. The composite filter 30 can also be selectively foldable. For example, the composite filter 30 can be folded to minimize its volume during delivery, and can be unfolded to perform its function after delivery. The composite filter 30 can include a filter unit 100, a filter module 200, a bracket 300, and a connecting member 400.

[0037] The filter unit 100 is configured to allow air to pass through, and can filter the air passing through the filter unit 100 into clean air. The filter unit 100 can be formed to extend in the vertical direction. Also, the filter unit 100 can be arranged so that one side through which air passes is aligned with one side of the filter module 200. For example, the filter unit 100 can perform second filtration on air that has passed through the filter module 200 and been primarily filtered, but depending on the flow direction, the air may be primarily filtered before passing through the filter module 200. The filter unit 100 can include a filter member 110 and a filter frame 120.

[0038] The filter member 110 is configured to filter dust particles in the air and can filter the air passing through the filter member 110 into clean air. The filter member 110 can be supported by a filter frame 120. The filter member 110 can also include a filtering portion 111.

[0039] The filtering unit 111 may be provided to filter air. The filtering unit 111 may have a plurality of pleats extending in the vertical direction. For example, the pleats of the filtering unit 111 may be folded so as to contract in a direction perpendicular to the vertical direction, or may be expanded so as to expand in a direction perpendicular to the vertical direction. A portion of the periphery of the filtering unit 111 may be surrounded by and supported by a support unit 121, which will be described later. For example, the upper and lower portions of the filtering unit 111 may be supported by the support unit 121. A bracket 300 may be attached to the side of the filtering unit 111.

[0040] Meanwhile, there may be a plurality of filtering units 111, and the plurality of filtering units 111 may be arranged so that at least some of them are adjacent to each other. The plurality of filtering units 111 may be provided in two or more numbers, and as a more specific example, there may be an even number of filtering units 111. Although the following description will be given assuming that four filtering units 111 are provided, this is merely an example and any number may be used.

[0041] 6 to 8, the plurality of filtering units 111 may be integrally formed and may be connected at their sides so as to be rotatable relative to one another. In other words, any one of the plurality of filtering units 111 may be rotatable relative to another adjacent filtering unit 111. For example, each of the plurality of filtering units 111 may be configured to rotate about an imaginary axis extending in the vertical direction and be folded with the adjacent filtering unit 111.

[0042] When the plurality of filtering units 111 are rotated relative to each other so that each of them forms an angle smaller than a straight angle, i.e., an angle smaller than 180°, with respect to the adjacent filtering units 111, the plurality of filtering units 111 may be arranged along a circular path. Here, a circular path may be defined as a predetermined path that starts from one point, passes through another point, and then returns to the first point. For example, three filtering units 111 may be provided. As a more specific example, referring to FIG. 6, the plurality of filtering units 111 may be rotated relative to each other so that each of them forms a predetermined angle with respect to the adjacent filtering units 111 (a 90° angle in the case of four filtering units). Here, the predetermined angle may be an angle at which the area of ​​the inner space surrounded by the plurality of filtering units 111 is maximized when viewed from above. In this case, as shown in FIG. 2, the plurality of filtering units 111 may form a rectangular ring when viewed from above. When each of the plurality of filtering sections 111 forms an angle greater than 0° and less than 180° with respect to the adjacent filtering section 111, the expanded state is defined.

[0043] 8, the plurality of filtering units 111 may be rotated relative to one another so that at least two adjacent filtering units 111 are arranged in parallel. As a more specific example, one of the plurality of filtering units 111 may be folded relative to another filtering unit 111 connected to one side by rotating it relative to the other filtering unit 111. In this case, the angle between one of the filtering units 111 and the other filtering unit 111 connected to one side is 0°. Also, one of the filtering units 111 may be unfolded relative to the other filtering unit 111 connected to the other side by rotating it relative to the other filtering unit 111 connected to the other side. A folded state is defined when the angle between each of the plurality of filtering units 111 and the adjacent filtering unit 111 is 0° or 180°. In this case, the angle between one of the filtering units 111 and the other filtering unit 111 connected to the other side is 180°.

[0044] In this manner, when the plurality of filtering units 111 are folded, two adjacent filtering units 111 are arranged in parallel, so that the adjacent filtering units 111 can be closely attached to each other. In addition, the space between the plurality of filtering units 111 is minimized, which has the effect of minimizing the volume of the filter member 110.

[0045] The filter frame 120 can support the filter element 110. For example, the filter frame 120 can be disposed to surround the upper and lower sides of the filter element 110 and support the filter element 110 from the upper and lower sides of the filter element 110. The filter frame 120 can include a plurality of support portions 121.

[0046] The support part 121 may support the filtering part 111. For example, the support part 121 may support the filtering part 111 above or below the filtering part 111. Furthermore, a plurality of support parts 121 may be provided, and the plurality of support parts 121 may be integrally formed. The plurality of support parts 121 may be connected to the sides of the plurality of support parts 121 so as to be rotatable relative to each other. That is, any one of the plurality of support parts 121 may rotate relative to another adjacent support part 121.

[0047] The filter module 200 may be provided to filter air flowing into the body 10 from the outside. The filter module 200 may include an additional dust-collecting filter to maximize dust collection performance, or may include other functional filters that are not intended for dust collection. For example, the filter module 200 may be a deodorizing filter that removes odors, a soot filter that removes soot particles, or a sick house filter that removes substances that induce sick house syndrome. More specifically, the deodorizing filter may include a corrugated or activated carbon deodorizing filter. The filter module 200 may be arranged alongside one or more of the filtering sections 111 of the filter unit 100 or may be arranged outside the filter unit 100. In other words, the filter module 200 may be arranged to surround at least a portion of the filter unit 100. The filter module 200 may primarily filter air before the air flowing from the outside is filtered by the filter unit 100. However, when applied to an air purifier with a different flow direction, the filter module 200 may also filter air after it has been filtered by the filter unit 100.

[0048] In addition, there may be a plurality of filter modules 200, and each of the plurality of filter modules 200 may be arranged side by side and connected to a plurality of filtering units 111. To connect the filter modules 200 to the filtering units 111, brackets 300 and connecting members 400 may be attached to the filter modules 200 and the filtering units 111. For example, the upper and lower surfaces of the filter module 200 may be connected to the filtering units 111 through the connecting members 400. In addition, the side surfaces of the filter module 200 may be connected to the filtering units 111 by the brackets 300.

[0049] In this specification and some of the drawings, it is expressed that a plurality of filter modules 200 are provided corresponding to the number of filtering units 111, but this is merely an example, and one or more filter modules 200 may be provided independently of the number of filtering units 111. Therefore, the number of filter modules 200 provided may be less than the number of filtering units 111, and the filter modules 200 may surround a plurality of filtering units 111. As a more specific example, it is also possible to provide one filter module 200 as shown in Figures 3 to 5.

[0050] Meanwhile, the filter module 200 may include an air purification member 210 and a module frame 220 .

[0051] The air purification member 210 may be provided to filter air. A portion of the air purification member 210 may be supported by the module frame 220. For example, the upper or lower side of the air purification member 210 may be surrounded by and supported by the module frame 220. In addition, a bracket 300 may be attached to the side of the air purification member 210.

[0052] Meanwhile, a protrusion 211 may be formed on at least one of both sides of the air purification member 210. For example, the air purification member 210 may include a plurality of members that extend in the vertical direction and have repeated bent shapes, and the protrusion 211 may be a portion of the air purification member 210 that protrudes outward. A bracket 300 may be attached to the protrusion 211. The protrusion 211 may be formed to correspond to a recess 321 of the bracket 300, which will be described later.

[0053] The module frame 220 can support the air purification member 210. The module frame 220 can support the air purification member 210 from above or below the air purification member 210.

[0054] The bracket 300 can support the filter unit 100 and the filter module 200 that are arranged adjacent to each other. For example, the bracket 300 can support adjacently arranged filtering units 111 among the plurality of filtering units 111 so that they can rotate relative to each other. Furthermore, the bracket 300 can support adjacently arranged supporting units 121 among the plurality of supporting units 121 so that they can rotate relative to each other. The bracket 300 can connect the filter unit 100 and the filter module 200. For example, one side of the bracket 300 can be attached to a side of the filtering unit 111 or the supporting unit 121, and the other side of the bracket 300 can be attached to a side of the filter module 200. Furthermore, the bracket 300 can seal a gap between the filter unit 100 and the filter module 200. Furthermore, an adhesive or adhesive tape that provides adhesive strength for attaching the side of the filter unit 100 to the side of the filter module 200 can be provided on one side of the bracket 300. The bracket 300 may be formed to extend in the vertical direction along the filtering part 111, and a plurality of brackets 300 may be provided.

[0055] Meanwhile, the bracket 300 may be configured to be folded or unfolded in response to rotation of the filtering unit 111 or the support unit 121. For example, when the filtering unit 111 is in an unfolded state (i.e., when the composite filter 30 is attached to the air purifier 1 and placed in a first state), the bracket 300 may be in an unfolded state to form a predetermined angle greater than 0° and less than 180°. When the filtering unit 111 is in a folded state (i.e., when the composite filter 30 is detached from the air purifier 1 and placed in a second state for storage or transportation), the bracket 300 disposed between any of the plurality of filtering units 111 may be fully unfolded to form an angle of 180°, and the bracket 300 disposed between other of the plurality of filtering units 111 may be folded to form an angle of 0°. The bracket 300 may be made of a flexible material including at least one of a porous material such as foam, a nonwoven fabric, a synthetic fiber, and a natural fiber.

[0056] The bracket 300 may include a folding portion 310 and an attachment portion 320. The folding portion 310 and the attachment portion 320 may be integrally formed.

[0057] The folding portion 310 allows adjacently arranged filtering units 111 to be selectively folded by rotation relative to each other. The folding portion 310 may be configured as a portion of the bracket 300 that is folded in response to the rotation of the filtering unit 111. For example, when a filtering unit 111 rotates relative to an adjacent filtering unit 111, the virtual axis about which the filtering unit 111 rotates may correspond to the folding portion 310. Furthermore, the folding portion 310 may be disposed between one filtering unit 111 and another filtering unit 111. The folding portion 310 may be provided in the center of the bracket 300 and extend in the vertical direction.

[0058] 7 , the mounting portion 320 may be attached to the filtering portion 111 to connect the plurality of filtering portions 111. A plurality of mounting portions 320 may be provided, and the plurality of mounting portions 320 may be connected to the folding portion 310 with the folding portion 310 sandwiched therebetween. Furthermore, the plurality of mounting portions 320 may be attached to adjacent filtering portions 111 among the plurality of filtering portions 111, respectively. Meanwhile, the mounting portion 320 may be attached to the filtering member 110 and the filter module 200, straddling the gap between the filtering member 110 and the filter module 200, thereby sealing the gap between the filtering member 110 and the filter module 200. More specifically, the mounting portion 320 may be attached to the supporting portion 121 to connect the plurality of filter frames 120. For example, the attachment portion 320 may extend from one end of the filtering portion 111 to the other end of the air purification member 210 to cover the sides of the filtering portion 111 and the air purification member 210 .

[0059] Meanwhile, one surface of the mounting portion 320 may be provided with an attachment surface that is attached to the side surface of the air purification member 210. The attachment surface may be bonded to the side surface of the air purification member 210. In addition, the mounting portion 320 may be formed with a recess 321 that corresponds to at least a part of the protrusion 211. For example, when the mounting portion 320 is attached to the side surface of the air purification member 210, the recess 311 may be attached to the protrusion 211.

[0060] The connecting member 400 can be attached to the filter unit 100 and the filter module 200 to connect the filter unit 100 and the filter module 200. For example, a portion of the connecting member 400 can be attached to the upper and lower surfaces of the filter unit 100, and another portion of the connecting member 400 can be attached to the upper and lower surfaces of the filter module 200. One surface of the connecting member 400 can be provided with an adhesive or adhesive tape that provides adhesive strength for attachment to the upper and lower surfaces of the filter unit 100 and the filter module 200. The connecting member 400 can also seal the gap between the filter unit 100 and the filter module 200. That is, the connecting member 400 can be attached to the support 121 of the filter unit 100 and the module frame 220 of the filter module 200 so as to seal the gap between them. The connecting member 400 can be made of a flexible material including one or more of a porous material such as foam, a nonwoven fabric, a synthetic fiber, and a natural fiber. However, as shown in FIG. 6, the connecting member 400 can be omitted.

[0061] Next, the effects of the composite filter 30 having the above-described configuration will be described.

[0062] The composite filter 30 provides the effects described below, but what is most significant is that it provides these effects economically with a simple configuration.

[0063] The composite filter 30 is configured such that the multiple filter units 100 are rotatable relative to one another, and can be easily switched between the unfolded state and the folded state.

[0064] In addition, when the composite filter 30 is in a folded state, adjacent filtering sections 111 are arranged to contact each other, thereby minimizing the space between the filter members 110. When the composite filter 30 is in a folded state, the volume can be minimized, thereby reducing the cost required for transportation. Furthermore, the composite filter 30 can be unfolded after transportation to perform its filtering function.

[0065] Meanwhile, the bracket 300 can connect one filtering section 111 to another filtering section 111, and has the effect of improving durability by reinforcing the connecting portion. In addition, the bracket 300 and the connecting member 400 can seal the gap between the filter unit 100 and the filter module 200, thereby preventing air from flowing between the filter unit 100 and the filter module 200. This has the effect of preventing air that has not been filtered by the filter module 200 from immediately flowing into the filter unit 100, thereby improving purification efficiency.

[0066] In addition to the above configuration, according to a second embodiment of the present invention, the number of filter members 110 may be six. Hereinafter, the second embodiment of the present invention will be described with further reference to Fig. 10. In describing the second embodiment, differences from the above-described embodiment will be mainly described, and the same descriptions and symbols as those of the above-described embodiment will be used.

[0067] In the second embodiment of the present invention, there may be six filter elements 110. When in an unfolded state, the filter elements 110 can rotate relative to each other to form an angle of 120° with respect to adjacent filter elements 110. Also, when viewed from above, the filter elements 110 may form a hexagonal ring. Each of the brackets 300 can rotate in response to the rotation of the filter elements 110.

[0068] The filter member 110 can filter air flowing in from various directions, thereby improving the filtering efficiency.

[0069] Hereinafter, a composite filter manufacturing method S10 for manufacturing a composite filter having four surfaces according to the first embodiment of the present invention will be described with reference to FIGS.

[0070] The composite filter manufacturing method S10 may manufacture the composite filter 30 by processing a laminated substrate in which a filter unit substrate 100 and a filter module substrate 200 are stacked. For example, the composite filter 30 may be manufactured using a filter manufacturing apparatus 40 including a cutter 41 and a conveyor 42. The composite filter manufacturing method S10 may include a laminated substrate providing step S100, a filter module cutting step S200, a filter unit cutting step S300, and a bracket mounting step S400.

[0071] In the laminated substrate providing step S100, a laminated substrate can be provided by stacking a provided filter module substrate 200 on a provided filter unit substrate 100. Here, the filter unit substrate 100 refers to the filter unit 100 before cutting, and the filter module substrate 200 refers to the filter module 200 before cutting. The laminated substrate can be transported to a conveyor 42 and can be transported in one direction by the conveyor 42.

[0072] In the filter module cutting step S200, the filter module preform 200 located at the top of the stack of preforms moving on the conveyor 42 may be cut. For example, in the filter module cutting step S200, a plurality of cutters 41 may cut the filter module preform 200 along imaginary cutting lines extending in the thickness direction of the filter module preform 200. At this time, the filter module preform 200 may be divided into a plurality of filter modules 200.

[0073] In the filter unit cutting step S300, a portion of the filter unit substrate 100 located at the bottom of the stacked substrate moving on the conveyor 42 may be cut. For example, in the filter unit cutting step S300, a plurality of cutters 41 may cut the filter module substrate 200 and then move continuously between the plurality of filter modules 200 along the cutting line to cut the filter unit substrate 100 to a depth smaller than the thickness of the filter unit substrate 100. The depth at which the filter unit substrate 100 is cut can be appropriately adjusted depending on the pleats formed in the filter unit substrate 100 so that the filter unit substrate 100 is not completely divided but multiple filter members 110 are formed. In the case of manufacturing a composite filter according to the first embodiment of the present invention having four sides, when cutting at a point that is a multiple of four as shown in FIG. 11, the cutting depth is adjusted so that the filter unit substrate 100 is completely divided.

[0074] In the bracket attachment step S400, the filter units 100 and filter modules 200 manufactured in the filter module cutting step S200 and filter unit cutting step S300 can be connected by the bracket 300. That is, in the bracket attachment step S400, the filter units 100 and filter modules 200 arranged adjacent to each other can be connected by attaching the bracket 300 to the side surfaces of the filter units 100 and filter modules 200. The bracket attachment step S400 can be performed after the filter module cutting step S200 and filter unit cutting step S300.

[0075] Although the embodiments of the present invention have been described above as specific embodiments, these are merely examples, and the present invention is not limited thereto, but should be construed as having the broadest scope in accordance with the technical ideas disclosed herein. Those skilled in the art may combine or substitute the disclosed embodiments to provide patterns of shapes not shown, but this would not depart from the scope of the present invention. In addition, those skilled in the art may easily modify or change the embodiments disclosed based on this specification, and it is clear that these modifications and changes also fall within the scope of the present invention.

Claims

1. a filter unit including a filter element that filters air and has a plurality of filtering sections that are rotatably connected to each other at their sides, and a filter frame that includes a support section that supports the upper or lower sides of the filtering sections; one or more filter modules including an air purification member for filtering air and a module frame supporting upper and lower sides of the air purification member, the filter modules being arranged alongside at least one of the plurality of filtering units; a bracket formed to extend in a vertical direction along the filtering unit, the bracket being attached to the filtering unit and the filter module so that adjacent filtering units among the plurality of filtering units can rotate relative to each other, and supporting the adjacent filtering units and the filter module together; a connecting member attached to an upper or lower side of the support portion and the module frame, the connecting member being arranged adjacent to each other so as to seal a gap between the support portion and the module frame; The bracket is a folding section that is selectively folded by relative rotation of the adjacently arranged filtering sections; a plurality of attachment portions connected to the folding portion with the folding portion interposed therebetween and attached to the side surfaces of the adjacently arranged filtering portions, The folding portion and the mounting portion are integrally formed with each other and made of a flexible material, A composite filter, wherein the attachment portion extends to a side surface of the adjacent filter module so as to seal a gap between the filtering portion and the filter module.

2. The plurality of filtering sections are three or more, 2. The composite filter of claim 1, wherein when each of the plurality of filtering sections is rotated relative to one another so that the angle with respect to the adjacent filtering section is less than a straight angle, the plurality of filtering sections are arranged along a looped path.

3. The composite filter according to claim 2 , wherein the number of the filtering sections is an even number.

4. 2. The composite filter of claim 1, wherein the plurality of filtering sections are rotatable relative to one another such that at least two adjacent filtering sections are aligned parallel to one another.

5. A composite filter as described in claim 1, wherein a protrusion is formed on at least one of both sides of the air purification member.

6. A filter unit including a filter member that filters air and has a plurality of filtering sections whose sides are connected to each other so as to be rotatable relative to each other; one or more filter modules including an air purification member for filtering air and arranged alongside at least one of the plurality of filtering units; a bracket formed to extend in a vertical direction along the filtering unit, the filtering units arranged adjacent to each other among the plurality of filtering units being attached to the filtering units arranged adjacent to each other and the filter module so as to be rotatable relative to each other, and supporting the filtering units arranged adjacent to each other and the filter module together; The bracket is a folding section that is selectively folded by relative rotation of the adjacently arranged filtering sections; a plurality of attachment portions connected to the folding portion with the folding portion interposed therebetween and attached to the side surfaces of the adjacently arranged filtering portions, The folding portion and the mounting portion are integrally formed with each other and made of a flexible material, the mounting portion extends to a side surface of the adjacent filter module so as to seal a gap between the filtering portion and the filter module; a protrusion is formed on at least one of both side surfaces of the air purification member, The bracket has a recess formed therein that corresponds to at least a part of the protrusion, and has an attachment surface that is attached to a side surface of the air purification member.

7. 3. The composite filter of claim 1, wherein the filter module comprises a corrugated filter.

8. a blower for providing a blowing force for passing outside air through the composite filter; An air purifier comprising the composite filter according to any one of claims 1 to 6.

9. 8. A composite filter manufacturing method for manufacturing the composite filter according to claim 7 using a filter manufacturing apparatus, providing a laminated substrate in which a filter unit substrate and a filter module substrate are laminated; a filter module cutting step in which a cutter of the filter manufacturing apparatus moves along an imaginary cutting line extending in a thickness direction of the laminated base material to divide and cut the filter module base material into a plurality of filter modules; a filter unit cutting step in which, after the filter module cutting step, the cutter moves between the plurality of filter modules along the cutting line to cut the filter unit base material to a depth smaller than a thickness of the filter unit base material; a bracket mounting step of mounting the bracket to a side surface of the filtering unit and the filter module, the side surface being arranged adjacent to each other; The filter unit including the plurality of filtering parts and the plurality of supporting parts is formed from the filter unit base material through the filter unit cutting step.

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