Filter and filter disassembling method

Abstract

To make it possible to easily perform an assembling work.SOLUTION: A filter includes: a filter medium 2 having each folding surface 21a facing in opposite directions by folding of a sheet-shaped filter material 2A in an accordion shape, each end face 21b and each lamination plane 21c; a frame body 3 which opens each folding surface 21a and is provided on each end face 21b and each lamination plane 21c; and a sheet member 4 which is so provided as to cover the end face 21b of the filter medium 2, and is bonded to the end face 21b by an adhesive. The sheet member 4 and the frame body 3 are partially bonded by the adhesive, and a seal material is filled between an opening edge (covering part 3Ab) of the frame body 3 and an end edge on the end face 21b side of each folding surface 21a along the opening edge.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a filter and a method for disassembling a filter. [Background technology]

[0002] For example, Patent Document 1 describes a filter having a filter media through which indoor air passes and captures substances contained in the air, a frame material covering the outer periphery of the filter media, a groove portion that continues around the entire circumference of the frame material, and a sealing member provided inside the groove portion. Patent Document 1 further shows that an opening that houses the filter and a rib that protrudes around the entire circumference of the opening are formed in the partition that separates the space on the intake side and the space on the discharge side of the filter, and the rib is in close contact with the sealing portion to separate the space on the intake side and the space on the discharge side. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2023-102311 Summary of the Invention [Problem to be solved by the invention]

[0004] As shown in Patent Document 1, it is important for the filter to ensure its performance that the space on the intake side and the space on the discharge side are separated by a sealing member. Even in the filter itself, the filter media and the frame material are adhered together with an adhesive, and the intake side and discharge side of the filter media are separated by the frame material.

[0005] However, in order to reduce the volume, dismantling a filter with the above configuration requires heating with a heater to soften the adhesive and then removing the adhesive with a scraper, which makes the work difficult and time-consuming. In particular, in the case of a filter that adsorbs infectious aerosols or other radioactive materials, such as those described in Patent Document 1, the dismantling work must be done inside a greenhouse while wearing protective equipment, making it difficult to carry out the work smoothly, and depending on the working environment, there is a risk that workers may suffer from heatstroke.

[0006] An object of the present invention is to provide a filter and a method for dismantling a filter that allows easy dismantling work. [Means for solving the problem]

[0007] In order to achieve the above object, a filter according to one embodiment of the present invention includes a filter media having folded surface portions, end surface portions, and stacked surface portions, each of which is a sheet-like filter material folded accordion-like and facing in opposite directions; a frame body that opens each of the folded surface portions and is arranged along each of the end surface portions and each of the stacked surface portions; and a sheet member that is arranged to cover the end surface portions of the filter media and is adhered to the end surface portions with an adhesive, wherein the sheet member and the frame body are partially adhered with the adhesive, and a sealant is filled between the opening edge of the frame body and the edge of the end surface portion of each of the folded surface portions that runs along the opening edge.

[0008] In order to achieve the above-mentioned object, one embodiment of the present invention provides a method for dismantling a filter, the method comprising: a filter medium in the form of a sheet of filter material folded accordion-like into a single piece, the filter medium having stacking surface portions including folded surfaces, end surfaces, and end portions facing in opposite directions; a frame body that opens each of the folded surfaces and is arranged along each of the end surfaces and each of the stacking surface portions; and a sheet member that is arranged to cover the end surfaces of the filter medium and is adhered to the end surfaces with an adhesive, the sheet member and the frame body being partially adhered to each other with an adhesive, and a sealing material being filled between the opening edge of the frame body and the peripheral edges of each of the end surfaces along the opening edge; the method comprises the steps of: cutting the filter medium along the end surfaces with a cutting tool; and severing the cut end surfaces together with the sheet member from the frame body. [Effects of the Invention]

[0009] According to this invention, dismantling work can be easily carried out. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is an exploded perspective view of a filter according to an embodiment. [Figure 2] FIG. 2 is an assembled perspective view of the filter according to the embodiment. [Figure 3] FIG. 3 is a partially enlarged cross-sectional view of the filter according to the embodiment. [Figure 4] FIG. 4 is a flowchart illustrating a method for disassembling a filter according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. Here, for convenience, the X direction is the depth direction, the Y direction is the horizontal direction, and the Z direction is the vertical direction shown in Figures 1 to 3. More specifically, the X direction is the direction in which air flows as a filter.

[0012] The filter 1 of the embodiment includes a filter medium 2, a frame 3, a sheet member 4, and a wire saw 5.

[0013] The filter media 2 performs the function of a filter. The filter media 2 of this embodiment includes a filter medium 2A and a separator 2B.

[0014] The filter medium 2A is made of, for example, glass fiber, formed into a sheet, and folded continuously in an accordion-like shape. This configuration results in the filter medium 2A being folded into a generally rectangular parallelepiped shape. In this embodiment, the filter media 2 has rectangular folded surfaces 21a formed by folding back the filter medium 2A on each side facing the X direction of the rectangular parallelepiped shape, rectangular end surfaces 21b formed by folding back the filter medium 2A on each side facing the Z direction, and rectangular stacked surfaces 21c formed by stacking the filter medium 2A on each side facing the Y direction.

[0015] Separator 2B is sandwiched between the folded portions of filter medium 2A and stacked together with filter medium 2A in the Y direction. Separator 2B is formed, for example, by folding a thin plate made of an aluminum alloy in a zigzag shape. Separator 2B ensures the spacing between the folded portions of filter medium 2A and maintains the cubic shape of filter medium 2A.

[0016] The frame 3 supports the filter media 2 and is intended for attachment to an air passage (not shown). The frame 3 includes plate-shaped first frame members 3A that fit along the end surface portions 21b of the filter media 2 and plate-shaped second frame members 3B that fit along the stacking surface portions 21c of the filter media 2. The first frame members 3A and the second frame members 3B are made of, for example, zinc-copper plate or stainless steel alloy plate. The Z-direction end surface portions 21b and the Y-direction stacking surface portions 21c of the filter media 2 are enclosed by the frame members 3A and 3B, and the X-direction folded surface portions 21a are open to the outside of the frame 3.

[0017] The first frame member 3A has reinforcing portions 3Aa at each edge in the X direction that are folded back to the outside of the frame in the Z direction and continue in the Y direction. The reinforcing portions 3Aa function as reinforcing members that maintain the plate shape of the first frame member 3A. The first frame member 3A also has covering portions 3Ab at each edge in the X direction that rise up toward the inside of the frame in the Z direction and extend and continue in the Y direction. The covering portions 3Ab form the opening edge of the frame body 3 and function as covering pieces that cover the edge of the end face 21b side of the folded surface 21a of the filter media 2. The first frame member 3A also has multiple fixing holes 3Ac that penetrate in the Z direction at each end in the Y direction. The first frame member 3A is formed symmetrically on one side of the filter media 2 in the Z direction.

[0018] The second frame member 3B has reinforcing portions 3Ba at each edge in the X direction that are folded back to the outside of the frame in the Y direction and continue in the Z direction. The reinforcing portions 3Ba function as reinforcing members that maintain the plate shape of the second frame member 3B. The second frame member 3B also has fixing pieces 3Bb at each edge in the Z direction that are folded back to the outside of the frame in the Y direction and continue in the X direction. The fixing pieces 3Bb of the second frame member 3B further have multiple fixing holes 3Bc that penetrate in the Z direction. The second frame member 3B is formed symmetrically on one side of the filter media 2 in the Y direction and on the other side.

[0019] The first frame member 3A and the second frame member 3B are fixed to each other by fixing screw members 3C through the fixing holes 3Ac, 3Bc with the fixing pieces 3Bb of the second frame member 3B overlapping the Y-direction ends of each first frame member 3A with a sealant (not shown) interposed therebetween and the fixing holes 3Ac, 3Bc aligned. The fixing screw members 3C are composed of, for example, screws 3Ca inserted into the fixing holes 3Ac, 3Bc and nuts 3Cb screwed onto the screws 3Ca.

[0020] The sheet member 4 is formed as a rectangular surface member whose dimension in the Y direction is equal to or smaller than the end surface 21b of the filter media 2. The sheet member 4 is preferably made of the same material as the filter medium 2A of the filter media 2 (e.g., glass fiber in this embodiment). As shown in FIG. 3, the sheet member 4 is provided so as to cover the end surface 21b of the filter media 2 and is adhered to the end surface 21b with an adhesive 6. For example, silicone can be used as the adhesive 6. The sheet member 4 is adhered to the end surface 21b by applying the adhesive 6 to the entire surface of one side facing the end surface 21b. Since the sheet member 4 is smaller in the Y direction than the end surface 21b of the filter media 2, when the fixing pieces 3Bb of the second frame member 3B are overlapped with the Y direction ends of each first frame member 3A, a gap through which the adhesive 6 can enter is formed between the Y direction end of the sheet member 4 and the inner surface of the second frame member 3B, ensuring a reliable seal at that location. 3, the other surface of the sheet member 4 is adhered to the plate surface of the first frame member 3A of the frame body 3 with an adhesive 6a. The adhesive 6a can be, for example, vinyl acetate. The other surface of the sheet member 4 facing the end surface portion 21b is partially coated with the adhesive 6a, and the sheet member 4 is adhered to the first frame member 3A.

[0021] 3, a sealant 7 is continuously filled in the Y direction between the covering portion 3Ab of the first frame member 3A, which forms the opening edge of the frame body 3, and the edge of the end face portion 21b of each folded surface portion 21a covered by the covering portion 3Ab. The sealant 7 can be, for example, a urethane resin or silicone.

[0022] The bellows-shaped ends of the filter material 2A in the filter media 2 are located on each stacking surface portion 21c and are adhered to the plate surface of the second frame member 3B with a sealant (not shown) applied continuously in the Z direction. In this way, the filter material 2A of the filter media 2 is attached within the frame between both openings of the frame body 3 while ensuring a seal.

[0023] The wire saw 5 is a linear cutting tool. The wire saw 5 is provided within the frame 3 at the position of the stacking surface portion 21c along the X direction. The wire saw 5 is provided on each edge of the stacking surface portion 21c on the end surface portion 21b side. When the wire saw 5 is provided, it is sealed with a sealing material so that no penetrations are formed in the X direction within the frame 3. The wire saw 5 is not necessarily provided.

[0024] The wire saw 5 is preferably made of a conductive material. When the wire saw 5 is configured as a conductive material, it is disposed insulated from the other conductive materials that constitute the filter 1. Furthermore, when the wire saw 5 is configured as a conductive material, a connector that is connected to a communication device is disposed at one end of the wire saw 5, although this is not shown in the drawings.

[0025] A method for disassembling the filter 1 of the embodiment will be described below with reference to FIG.

[0026] As shown in Fig. 2, in step S1, the used filter 1 is placed in a vinyl bag. The opening of the vinyl bag containing the used filter 1 is sealed by welding to prevent dust from scattering to the outside. Although not shown in the figure, the vinyl bag is assumed to have a glove-like vinyl attached so that the filter 1 can be accessed by hand from the outside of the vinyl bag. Furthermore, although not shown in the figure, the vinyl bag is assumed to have a storage vinyl attached so that disassembled parts can be stored separately.

[0027] In step S2, the filter media 2 is cut along the sheet member 4 with a cutting tool. Specifically, in step S2, the cutting tool, wire saw 5, is moved in the Y direction along the first frame member 3A (sheet member 4) to cut the filter media 2 at the end surface portion 21b. As a result, the filter media 2 is separated from the first frame member 3A by the end surface portion 21b, which is adhered to the first frame member 3A with the adhesive 6 and sealed with the sealing material 7, along with the sheet member 4, together with the first frame member 3A.

[0028] In step S3, the frame body 3 is separated. Specifically, in step S3, the fixing screw members 3C are removed, and the first frame members 3A and the second frame members 3B are separated. Then, the end portions of the filter media 2A bonded to the second frame members 3B are peeled off. This separates the second frame members 3B of the frame body 3 from the filter media 2. Furthermore, the frame body 3 has its end surface portions 21b bonded with adhesive 6 and sealed with sealing material 7, and the first frame member 3A, including the sheet member 4, is separated from the filter media 2.

[0029] In step S4, the cut end surface portion 21b is separated from the first frame member 3A together with the sheet member 4. Since the sheet member 4 is partially adhered to the first frame member 3A with the adhesive 6a, the separation operation can be carried out extremely easily.

[0030] In step S5, each part of the filter media 2 (the filter medium 2A and the separator 2B) and the frame members 3A and 3B are separately stored in a vinyl storage bag. The filter media 2, separated from the frame 3, is in a state in which the filter medium 2A is folded in an accordion-like shape, with the separator 2B sandwiched between the folded portions. Therefore, the filter media 2 can be easily separated into the filter medium 2A and the separator 2B by simply unfolding the folded portions of the filter medium 2A and stretching the accordion-like portion. The separated filter medium 2A and separator 2B are then stored in their respective vinyl storage bags. Furthermore, the end surface portion 21b separated in step S4 is separated into the filter medium 2A and the separator 2B, which are then stored in their respective vinyl storage bags. At this time, by using the same material as the filter medium 2A for the sheet member 4, the sheet member 4 can be stored together with the filter medium 2A in the vinyl storage bag. Furthermore, the frame members 3A and 3B are stored in the vinyl storage bag together with the fixing screw member 3C.

[0031] In this way, the filter 1 can be disassembled while it is housed in the vinyl bag, separated, and stored in vinyl bags for storage. The separated vinyl bags for storage are vented through small-diameter tubes (forming a closed system with a pinch cock or the like) prepared in advance to remove the air inside. With this disassembly method, since a boundary is always formed by the vinyl bags during disassembly work, workers can wear lighter protective clothing and the equipment for preventing dust dispersion (exhaust equipment, purification equipment) can be made smaller.

[0032] The dismantling method described above may be performed in a greenhouse whose interior is maintained at negative pressure. When the dismantling work is performed in a greenhouse, step S1 can be omitted, and all other steps are performed in the greenhouse. Furthermore, if a wire saw 5 is not provided, steps S2 and S3 are interchanged, and after separating the frame 3, the filter media 2 is cut at the end surface 21b with a cutting tool.

[0033] The filter 1 of the embodiment is characterized by including a filter media 2 in which a sheet-like filter material 2A is folded accordion-like and has folded surface portions 21a, end surface portions 21b, and stacked surface portions 21c facing in opposite directions; a frame body 3 that opens each folded surface portion 21a and is arranged along each end surface portion 21b and each stacked surface portion 21c; and a sheet member 4 that is arranged to cover the end surface portion 21b of the filter media 2 and is adhered to the end surface portion 21b with an adhesive 6, and the sheet member 4 and the frame body 3 are partially adhered together with an adhesive 6a, and a sealing material 7 is filled between the opening edge of the frame body 3 and the edge of the folded surface portion 21a on the end surface portion 21b side that runs along the opening edge.

[0034] According to this filter 1, the main body of the filter material 2A can be very easily separated by cutting the end surface portion 21b of the filter media 2. Furthermore, according to this filter 1, the end surface portion 21b remains on the frame 3 together with the sheet member 4. However, because the frame 3 and the sheet member 4 are partially bonded with the adhesive 6a, the end surface portion 21b can be very easily separated from the frame 3 along with the sheet member 4. Without the sheet member 4, the entire surface of the end surface portion 21b must be firmly bonded to the frame 3 with the adhesive 6 to ensure sealing. This makes it difficult to separate the end surface portion 21b from the frame 3, making the work difficult and time-consuming. Therefore, for example, when dismantling a filter that adsorbs radioactive materials, workers may be exposed to radiation during the work, which can be stressful.

[0035] Moreover, the filter 1 of the embodiment further includes a wire saw 5 provided within the frame body 3 at the position of each stacking surface portion 21c.

[0036] According to this filter 1, by providing the wire saw 5 inside the frame 3, it is possible to cut the end surface portion 21b of the filter media 2 before separating the frame 3. Because the filter media 2 is supported by the frame 3 before separating the frame 3, the cutting operation is extremely easy.

[0037] In the filter 1 of the embodiment, the wire saw 5 is made of a conductive material.

[0038] According to this filter 1, the wire saw 5 can be used as a communication antenna, which makes it possible for this filter 1 to obtain, for example, data from a measuring instrument that measures vibrations through communication.

[0039] The method for dismantling the filter 1 of the embodiment is characterized by including the steps of cutting the filter media 2 along the end surface portion 21b with a cutting tool and separating the cut end surface portion 21b together with the sheet member 4 from the first frame member 3A.

[0040] According to this method for dismantling filter 1, the main body of filter material 2A can be very easily separated by cutting end surface portion 21b of filter media 2. According to this method for dismantling filter 1, end surface portion 21b remains on the frame 3 together with sheet member 4, but because frame 3 and sheet member 4 are partially bonded with adhesive 6a, end surface portion 21b can be very easily separated from frame 3 together with sheet member 4. If sheet member 4 is not used, the entire surface of end surface portion 21b must be firmly bonded to frame 3 with adhesive 6 to ensure sealing, making it difficult to separate end surface portion 21b from frame 3, resulting in poor workability and a long work time, and dismantling a filter that adsorbs radioactive materials places a strain on workers working in an environment where they are exposed to radiation.

[0041] In the method for dismantling the filter 1 of the embodiment, the filter 1 is dismantled in a state where it is housed in a vinyl bag.

[0042] According to this method for dismantling filter 1, a boundary is always formed with a vinyl bag during dismantling work, so workers can wear lighter protective clothing and the equipment for preventing dust dispersion (exhaust equipment, purification equipment) can be made smaller. [Explanation of symbols]

[0043] 1. Filter 2. Filter Media 21a Folded surface part 21b End section 21c Laminated surface part 2A filter media 3 Frame 4 Sheet material 5 Wire saw 6. Adhesive 6a Adhesive 7 Sealing material

Claims

1. a filter medium in the form of a sheet folded in an accordion-like shape, having folded surfaces, end surfaces, and stacked surfaces facing in opposite directions; a frame body provided along each of the end surface portions and each of the stacking surface portions with each of the folded surface portions being open; a sheet member provided to cover the end surface of the filter medium and adhered to the end surface with an adhesive; Including, the sheet member and the frame body are partially bonded with an adhesive, and a sealant is filled between an opening edge of the frame body and an edge of each of the folded surfaces along the opening edge on the side of the end surface portion. filter.

2. Further comprising a wire saw provided within the frame of the frame body at the position of each of the stacking surface portions, The filter of claim 1 .

3. The wire saw is made of a conductive material. The filter of claim 2.

4. a filter medium having a sheet-like filter material folded in an accordion-like shape and having folded surfaces facing in opposite directions, end surfaces, and stacked surfaces including end portions; a frame body provided along each of the end surface portions and each of the stacking surface portions with each of the folded surface portions being open; a sheet member provided to cover the end surface of the filter medium and adhered to the end surface with an adhesive; Including, a filter disassembly method, wherein the sheet member and the frame body are partially bonded together with an adhesive, and a sealant is filled between an opening edge of the frame body and a peripheral edge of each of the end face portions along the opening edge, cutting the filter media along the edge portion with a cutting tool; a step of separating the cut end surface portion from the frame together with the sheet member; Including, How to disassemble the filter.

5. The filter is disassembled while being housed in a vinyl bag. The method for dismantling a filter according to claim 4.

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