Air purification system and fabric duct

Abstract

To provide an air cleaning system and a fabric duct capable of securing dust removing performance according to the use of a building.SOLUTION: The air purification system purifies air in a building, and includes a fabric duct which is installed on a wall or a floor of the building, into which clean air is introduced, and which blows out the clean air into the building. This air cleaner has a first filter member for collecting dust and the like and circulating clean air when the clean air is introduced, and a second filter member formed in a bag shape so as to cover the first filter member on the outside of the first filter member and maintaining its shape in a duct shape by itself by the clean air blown out from the first filter member when the clean air is introduced into the first filter member. In addition, a fabric duct is installed on a wall or a floor of a building to purify air in the building by introducing clean air into the fabric duct, and includes the first filter member and the second filter member described above.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to air purification systems and fabric ducts in buildings such as production facilities. [Background technology]

[0002] Reducing the weight of ceiling equipment in buildings such as production facilities is one effective way to avoid human and property damage caused by ceiling equipment falling during an earthquake. Patent Document 1 discloses an air purification system in which lightweight fabric ducts are placed near the ceiling. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-98038 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the air purification system and fabric duct of Patent Document 1 may not be able to ensure sufficient dust removal performance to meet the diverse uses of buildings, such as production lines in industrial production facilities that require high levels of cleanliness.

[0005] The present invention is intended to solve the above-mentioned problems, and aims to provide an air purification system and a fabric duct that can ensure dust removal performance according to the use of the building. [Means for solving the problem]

[0006] The air purification system of the present invention is an air purification system that purifies the air inside a building, and is equipped with a cloth duct that is installed on the wall or floor of the building, into which clean air is introduced and which blows out the clean air into the building, and the cloth duct has a first filter member that has one end serving as an inlet for the clean air and is formed in a bag shape, and that captures dust and other particles when the clean air is introduced and allows the clean air to circulate, and a second filter member that is formed in a bag shape on the outside of the first filter member to cover the first filter member, and that when the clean air is introduced into the first filter member, maintains its shape as a duct by the clean air blown out from the first filter member.

[0007] Furthermore, the fabric duct of the present invention is a fabric duct that is installed on the wall or floor of a building, and into which clean air is introduced to purify the air within the building, and is equipped with a first filter member that has one end serving as an inlet for the clean air and is formed in a bag shape, and that captures dust and other particles when the clean air is introduced and allows the clean air to circulate, and a second filter member that is formed in a bag shape on the outside of the first filter member to cover the first filter member, and that when the clean air is introduced into the first filter member, maintains its shape as a duct by the clean air blowing out from the first filter member.

[0008] According to the present invention, dust particles are captured by the first filter member and passed through to the second filter member, thereby improving the life of the second filter member.

[0009] In one aspect of the present invention, the first filter member is formed of a nonwoven fabric, and the second filter member is formed of a porous film made of resin.

[0010] According to one aspect of the present invention, the dust removal performance and durability of a fabric duct can be improved.

[0011] In one aspect of the present invention, a first air intake pipe having a first flange portion formed on the indoor side that introduces the clean air is provided on the wall or the floor, a second air intake pipe having a second flange portion formed on the outside is provided on the inlet side of the first filter member, and a fastening member is provided on the outside of the second filter member to clamp the first filter member and the second filter member between it and the second air intake pipe, and the first flange portion and the second flange portion are fixed by a fastening member with a gasket interposed between them.

[0012] According to one aspect of the present invention, the fabric duct can be easily attached and detached, making it possible to create an indoor environment with a cleanliness level that suits the purpose and use. [Effects of the Invention]

[0013] According to the present invention, it is possible to provide an air purification system that can ensure dust removal performance according to the use of the building. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is a schematic diagram illustrating a fabric duct according to an embodiment of the present invention, where (a) is an oblique view showing the structure of a portion of the fabric duct, and (b) is a plan view of the fabric duct as seen from the clean air inlet side. [Figure 2] FIG. 2 is a schematic diagram showing an example of a cross section of a second filter member in a fabric duct according to an embodiment of the present invention, where (a) is an example of a cross section of a second filter member formed of three layers, and (b) is an example of a cross section of a second filter member formed of five layers. [Figure 3] Figure 3 is a schematic diagram illustrating a sealing portion in a fabric duct in an air purification system according to an embodiment of the present invention, where (a) is a plan view of the fabric duct seen from the outer periphery, and (b) is a plan view of the fabric duct seen from the clean air inlet side. [Figure 4] FIG. 4 is a perspective view schematically illustrating an example of a portion of a first sealing portion of a fabric duct in an air purification system according to an embodiment of the present invention. [Figure 5] FIG. 5 is a schematic diagram showing an example of a fabric duct mounting mechanism in an air purification system according to an embodiment of the present invention. [Figure 6] FIG. 6 is a schematic diagram illustrating an air purification system according to an embodiment of the present invention. [Figure 7] FIG. 7 is a schematic diagram showing a modified example of an air purification system according to an embodiment of the present invention. [Figure 8] FIG. 8 is a schematic diagram showing another modified example of the air purification system according to the embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0015] 1 to 4, a fabric duct 10 in an air purification system 100 according to an embodiment will be described. The fabric duct 10 is generally also referred to as a membrane duct, a sock duct, a sock duct, or a sock filter. In the following drawings, identical members or parts, or members or parts having the same function, are given the same reference numerals or the reference numerals are omitted. In addition, block arrows in the following drawings, including FIG. 1, schematically indicate the direction in which the purified air CA flows.

[0016] As shown in Fig. 1, the fabric duct 10 is configured so that clean air CA is introduced into the fabric duct 10 and the clean air CA is blown out of the fabric duct 10. As will be described in detail later with reference to Figs. 6 to 8, the clean air CA refers to air that is circulated and purified in, for example, a clean room in a production facility.

[0017] The fabric duct 10 includes a filter member 1 having a bag-shaped first filter member 1a and a bag-shaped second filter member 1b formed on the outside of the first filter member 1a to cover the first filter member 1a. An inlet 10a for clean air CA is provided at one end of the first filter member 1a. The filter member 1 is formed so as to stretch in the direction of the introduction of clean air CA and expand into a duct shape when clean air CA is introduced through the inlet 10a.

[0018] The first filter member 1a is formed so that when clean air CA is introduced, it captures relatively large dust particles contained in the clean air CA and allows the clean air CA to circulate through the first filter member 1a. When clean air CA is introduced into the first filter member 1a, the second filter member 1b maintains its own shape, i.e., the shape of the second filter member 1b, in a duct shape by the clean air CA blown out from the first filter member 1a.

[0019] The first filter member 1a preferably has non-uniform pore sizes through which the clean air CA passes. Furthermore, the first filter member 1a preferably has a larger average pore size than the second filter member 1b. The first filter member 1a is preferably made of a nonwoven fabric, such as an electret nonwoven fabric. By using the electret nonwoven fabric for the first filter member 1a, the electric charge of the electret nonwoven fabric can adsorb dust particles smaller than the pores of the first filter member 1a, thereby improving the filtering performance of the first filter member 1a. When the first filter member 1a is made of nonwoven fabric, the material can be, for example, quartz glass.

[0020] The second filter member 1b preferably has uniform pore size for passing the clean air CA. Furthermore, the second filter member 1b preferably has a smaller average pore size than the first filter member 1a. The second filter member 1b is preferably a resin porous membrane, such as a porous membrane made of engineering plastics. When the second filter member 1b is a resin porous membrane, the material can be, for example, polytetrafluoroethylene (PTFE).

[0021] By forming the first filter member 1a so that the holes through which the clean air CA passes are of non-uniform size, it is possible to capture a wide range of relatively large particles of dust passing through the first filter member 1a. Furthermore, by improving the dust removal performance of the first filter member 1a, clogging of the second filter member 1b by dust can be delayed, and the increase in pressure loss over time in the second filter member 1b can be delayed. This improves the durability of the second filter member 1b and extends the product life of the fabric duct 10.

[0022] Furthermore, by forming the second filter member 1b so that the holes through which the clean air CA passes are uniform in size, the pressure of the clean air CA is applied uniformly to the inner surface of the second filter member 1b. This prevents uneven pressure from being applied to the inner surface of the second filter member 1b, improving the durability of the second filter member 1b and extending the product life of the fabric duct 10. Furthermore, by forming the second filter member 1b so that the fibers are thinner than those of the first filter member 1a, the number and total area of ​​the holes in the second filter member 1b can be made larger than those of the first filter member 1a. Increasing the number and total area of ​​the holes in the second filter member 1b reduces pressure loss when the clean air CA is introduced into the fabric duct 10. This allows the fabric duct 10 to expand without increasing the flow rate of the clean air CA, thereby reducing the running costs of the air purification system 100.

[0023] The second filter member 1b may have a multilayer structure, taking into consideration the pressure loss and filter performance depending on the purpose and application of air purification. For example, as shown in FIG. 2(a), it may have a three-layer structure in which one filter layer 1b1 is sandwiched between two protective layers 1b2. Furthermore, as shown in FIG. 2(b), the fabric duct 10 may have a five-layer structure in which three protective layers 1b2 and two filter layers 1b1 are alternately stacked. When the second filter member 1b has a layered structure, the filter layer 1b1 is formed, for example, as a porous resin film, and the protective layer 1b2 is formed, for example, as a nonwoven fabric. By forming the protective layer 1b2 as the outermost layer of the second filter member 1b, the surface of the filter layer 1b1 can be protected.

[0024] As shown in FIG. 3, the fabric duct 10 has an L-shaped sealed portion 10b. The sealed portion 10b has a first sealed portion 10b1 extending in the longitudinal direction and a second sealed portion 10b2 extending in the lateral direction from one end of the first sealed portion 10b1. By forming the sealed portion 10b, the fabric duct 10 is formed into a bag shape. By introducing clean air CA into the bag-shaped fabric duct 10 through the inlet 10a, the fabric duct 10 is maintained in a duct shape. When the fabric duct 10 is maintained in a duct shape, a space is formed between the first filter member 1a and the second filter member 1b, as shown in FIG. 1. The sealing portion 10b is formed on one of the longitudinal and two lateral sides of the three overlapping sides formed by folding the first and second filter members 1a and 1b, which are formed in a sheet shape and have a large aspect ratio, e.g., an aspect ratio of 2 or more, in the transverse direction. The sealing portion 10b is formed by a sealing process. The sealing process is performed, for example, by ultrasonic sealing. If the sealing portion 10b is formed by sewing or adhesive processing, lint generation or cracking of the sealing portion 10b may occur, resulting in the generation of dust or air leakage through the sealing portion 10b. In contrast, if the sealing portion 10b is formed by welding, the sealing process is performed only with the fabric duct 10, and lint generation or cracking of the sealing portion 10b does not occur, thereby preventing the generation of dust or air leakage through the sealing portion 10b.

[0025] The sealing portion 10b is preferably formed by folding the first filter member 1a into a bag-like shape and then folding and overlapping the second filter member 1b so that it covers the first filter member 1a, and then further sealing the sealed portion of the first filter member 1a. If the first filter member 1a and the second filter member 1b are separately sealed into a bag-like shape and then the first filter member 1a is inserted into the second filter member 1b, friction will occur between the outer surface of the first filter member 1a and the inner surface of the second filter member 1b during insertion. If friction occurs between the outer surface of the first filter member 1a and the inner surface of the second filter member 1b, the workability of manufacturing the fabric duct 10 will decrease, and the first filter member 1a and the second filter member 1b may be damaged by the application of excessive external force. In contrast, if the sealing portion 10b is tightly attached so that both the first filter member 1a and the second filter member 1b are bag-shaped, the first filter member 1a is inserted inside the second filter member 1b, improving workability in manufacturing the fabric duct 10. Furthermore, improving workability in manufacturing the fabric duct 10 reduces the possibility of damage to the first filter member 1a and the second filter member 1b.

[0026] As shown in FIG. 4, the first sealing portion 10b1 may have a through hole 5 formed in the direction of extension of the first sealing portion 10b1. The through hole 5 is formed, for example, by grommeting the first sealing portion 10b1. The grommets used for grommeting may be made of brass, for example. By grommeting the through hole 5, when extending the fabric duct 10 along the ceiling RC as shown in FIGS. 6 and 7 described below, it becomes possible to extend the fabric duct 10 while hanging it from the ceiling RC. Furthermore, by grommeting the through hole 5, it is possible to prevent fraying of fibers from the fabric duct 10 through the through hole 5, thereby preventing the generation of dust.

[0027] Next, the attachment mechanism 20 for attaching the fabric duct 10 to the wall RW or floor RS of the room CR will be described with reference to Figure 5. The air purification system 100 has the attachment mechanism 20, which makes it easy to attach and detach the fabric duct 10, and therefore makes it possible to create an indoor CR environment with a cleanliness level suited to the purpose and use.

[0028] The mounting mechanism 20 includes a first air supply pipe 21. The first air supply pipe 21 is provided in the wall RW or the floor RS. The first air supply pipe 21 may be made of, for example, stainless steel.

[0029] The first air supply pipe 21 has a first flange portion 21a and a first tubular portion 21b. The first flange portion 21a is formed on the indoor CR side. The first flange portion 21a is formed so as to be continuous with the first tubular portion 21b. The first flange portion 21a forms an air supply port (not shown) that introduces clean air CA into the indoor CR. The first flange portion 21a may be formed integrally with the first tubular portion 21b, or may be formed as a separate member and connected by a fastening member or the like. The first tubular portion 21b penetrates the wall RW or the floor RS, and its tip is located outside the wall RW or the floor RS. The tip of the first tubular portion 21b is fixed to the air supply unit 30 by a sealing process such as caulking. The air supply unit 30 can be any member that supplies clean air CA. For example, the air intake section 30 may be an air intake duct, or may be an air intake port such as a bell mouth of the air conditioner 50 (see FIG. 6).

[0030] If clean air CA is not introduced into the room CR, the air intake port of the first flange portion 21a can be closed with a cap (not shown). Closing the air intake port of the first flange portion 21a can prevent dust and other debris from entering through the air intake port of the first flange portion 21a. Furthermore, if the first flange portion 21a is provided on the floor RS, closing the air intake port of the first flange portion 21a with a cap can ensure safety when moving around within the room CR.

[0031] The attachment mechanism 20 includes a second air intake pipe 23. The second air intake pipe 23 is provided inside the fabric duct 10. More specifically, the second air intake pipe 23 is provided on the inlet 10a side of the first filter member 1a shown in Figure 1. The second air intake pipe 23 can be made of, for example, stainless steel.

[0032] The second air intake pipe 23 has a second flange portion 23a and a second tubular portion 23b. The second flange portion 23a is formed on the outside of the second air intake pipe 23. The second flange portion 23a is formed to be continuous with the second tubular portion 23b. The second flange portion 23a forms an air intake port (not shown) that introduces clean air CA into the inside of the first flange portion 21a via the second tubular portion 23b and the inlet 10a. The second flange portion 23a may be formed integrally with the second tubular portion 23b, or may be formed as a separate member and connected by a fastening member or the like. The tip of the second tubular portion 23b is positioned on the inner surface side of the first filter member 1a, via the inlet 10a.

[0033] The attachment mechanism 20 includes a fastening member 25. The fastening member 25 is provided on the outside of the second filter member 1b. More specifically, the fastening member 25 is provided on the outer surface side of the fabric duct 10, i.e., the outer surface side of the second filter member 1b. The fastening member 25 is formed to sandwich the fabric duct 10, more specifically the first filter member 1a and the second filter member 1b, between the fastening member 25 and the second air intake pipe 23, more specifically the second tubular portion 23b.

[0034] The fastening member 25 has a pair of support parts 25a, a hinge part 25b that hinges together one end of the pair of support parts 25a, and a pair of locking parts 25c that are respectively provided on the other end of the pair of support parts 25a. The pair of support parts 25a, the hinge part 25b, and the pair of locking parts 25c can be made of, for example, stainless steel.

[0035] The pair of support portions 25a have a substantially cylindrical outer shell. A plurality of arc-shaped rubber rings 25a1 are provided on the inner periphery of the pair of support portions 25a. The rubber rings 25a1 may be made of synthetic rubber such as butadiene rubber. The pair of locking portions 25c rotate about the hinge portion 25b as an axis and are opened and closed via the pair of support portions 25a.

[0036] The fastening member 25 is attached to the outer surface of the fabric duct 10 near the inlet 10a of the fabric duct 10 with the pair of locking portions 25c open. By closing the pair of locking portions 25c, the pair of support portions 25a press the outer surface of the fabric duct 10 against the second tubular portion 23b via the rubber ring 25a1. Then, by fastening the pair of locking portions 25c to each other with screws 25c1, the pair of support portions 25a can tightly contact the outer surface of the fabric duct 10 against the second tubular portion 23b via the rubber ring 25a1. Therefore, by providing the fastening member 25, the first filter member 1a and the second filter member 1b can be sandwiched between the second air intake pipe 23 and the fabric duct 10, ensuring airtightness between the second air intake pipe 23 and the fabric duct 10.

[0037] The mounting mechanism 20 includes a packing 27. The packing 27 is formed in an annular shape and is disposed between the first flange portion 21 a and the second flange portion 23 a. The packing 27 may be made of, for example, a synthetic rubber of polyurethane and polyester.

[0038] The attachment mechanism 20 includes a fastening member 29. The first flange portion 21a and the second flange portion 23a are fixed by the fastening member 29 with a packing 27 interposed between the first flange portion 21a and the second flange portion 23a. By fixing the first flange portion 21a and the second flange portion 23a by the fastening member 29 with the packing 27 interposed, airtightness between the first flange portion 21a and the second flange portion 23a can be ensured.

[0039] Next, an air purification system 100 according to this embodiment will be described with reference to Figures 6 to 8. In Figures 6 to 8, an example of a building BLG is a production facility such as a machine parts factory, and an example of a room CR is a clean room where a certain level of air cleanliness must be ensured.

[0040] The air purification system 100 in Fig. 6 includes a fabric duct 10, an attachment mechanism 20, and an air conditioning device 50. In the air purification system 100 in Fig. 6, the attachment mechanism 20 is installed on a wall RW, and the fabric duct 10 is connected to the air conditioning device 50 via the attachment mechanism 20. The air conditioning device 50 includes a heat exchanger 50a and a blower 50b. The air conditioning device 50 is formed, for example, as a dry coil unit (DCU) or a wall-mounted air conditioning unit.

[0041] In the air purification system 100 of FIG. 6, conditioned air whose temperature or humidity has been adjusted in the heat exchanger 50a of the air conditioner 50 is introduced as clean air CA into the interior of the fabric duct 10 via the mounting mechanism 20 by the blower 50b of the air conditioner 50. The clean air CA introduced into the interior of the fabric duct 10 is blown out from the outer surface of the fabric duct 10, and the air in the room CR is circulated and purified. The circulated clean air CA is exhausted from an exhaust port (not shown) provided in the floor RS and taken into the air conditioner 50. The clean air CA taken into the air conditioner 50 is temperature-adjusted or humidity-adjusted in the heat exchanger 50a. In the air purification system 100 of FIG. 6, the above cycle is repeated.

[0042] In the air purification system 100 of Fig. 6, the fabric duct 10 is formed so as to extend along the ceiling RC from one wall RW to the other wall RW. Because the fabric duct 10 is lightweight, it can reduce human injury to workers WKR in the room CR if it falls due to an earthquake.

[0043] Furthermore, as described above, the fabric duct 10 can be expanded without increasing the volume of clean air CA, and therefore the fabric duct 10 can also be expanded by the volume of air blown by the blower 50b of the air conditioning unit 50. Therefore, in the air purification system 100 of Figure 6, the air purification system 100 can be operated without providing a fan unit for introducing clean air CA into the room CR, thereby reducing the running costs of the air purification system 100.

[0044] In addition, in Figure 6, one fabric duct 10 is connected to one air conditioning unit 50, but this is not limited to this and two or more fabric ducts 10 may be connected to one air conditioning unit 50. Also, in Figure 6, two fabric ducts 10 are arranged in the room CR, but this is not limited to this and only one fabric duct 10 may be arranged in the room CR, or three or more fabric ducts 10 may be arranged in the room CR depending on the purpose and use.

[0045] 7, the room CR is divided into four linear spaces, a first line PL1, a second line PL2, a third line PL3, and a fourth line PL4, by partitions 80. The partitions 80 may be detachable partition members such as curtains, for example.

[0046] The air purification system 100 of FIG. 7 includes an intake fan 90, a plurality of supply air volume regulators 70, a plurality of mounting mechanisms 20 connected to the supply air volume regulators 70, a fabric duct 10, a plurality of exhaust volume regulators 75, and an air conditioning unit 50. In the air purification system 100 of FIG. 7, the mounting mechanism 20 is installed on a wall RW. The purified air CA generated by the supply air fan 90 has its volume adjusted by the supply air volume regulators 70. In the first line PL1 and the third line PL3, the purified air CA whose volume has been adjusted by the supply air volume regulators 70 is introduced into the room CR via the mounting mechanism 20 and the fabric duct 10. In the second line PL2 and the fourth line PL4, the purified air CA whose volume has been adjusted by the supply air volume regulators 70 is introduced into the room CR via the mounting mechanism 20. The clean air CA that has circulated through each line space is exhausted after its volume is adjusted by exhaust volume adjuster 75 disposed on wall RW, and then circulated to air supply fan 90. In air purification system 100 of Figure 7, the above cycle is repeated.

[0047] Each of the supply air amount regulator 70 and the exhaust air amount regulator 75 may be a variable air volume (VAV) unit or a constant air volume (CAV) unit depending on the purpose and use. In the air purification system 100 of FIG. 7, the air conditioner 50 provides conditioned air to each line space via a flow separate from the purified air CA. The number of air conditioners 50 arranged in each line space can be any number depending on the purpose and use of the line space. The air conditioner 50 is formed, for example, as a dry coil unit (DCU) or a packaged air conditioning unit.

[0048] In the air purification system 100 of Figure 7, the attachment mechanism 20 makes it easy to attach and detach the fabric duct 10, so that multiple line spaces with different cleanliness levels according to the purpose and use can be easily constructed inside the room CR.

[0049] 7, the amount of air supplied to each line space can be appropriately adjusted according to the purpose and use of each line space by the air supply amount adjuster 70. For example, by making the amount of air supplied to the first line PL1 and the third line PL3 greater than the amount of air supplied to the second line PL2 and the fourth line PL4, it is possible to prevent clean air CA with a low degree of cleanliness in the second line PL2 and the fourth line PL4 from flowing into the first line PL1 and the third line PL3.

[0050] 7, the air supply rate adjuster 70 can adjust the amount of air supplied to the fabric duct 10, so that the flow rate of the purified air CA can be adjusted according to the length of the fabric duct 10, thereby maintaining the expansion of the fabric duct 10. For example, by adjusting the amount of air supplied to the fabric duct 10 with the air supply rate adjuster 70, when the line spaces are directly arranged, it is possible to extend the fabric duct 10 across multiple line spaces.

[0051] The air purification system 100 of Figure 8 comprises a fabric duct 10, an attachment mechanism 20, an air conditioning device 50, and an exhaust fan 95. In the air purification system 100 of Figure 8, the attachment mechanism 20 is installed on the floor RS, and the fabric duct 10 is connected to the air conditioning device 50 via the attachment mechanism 20. The air conditioning device 50 has a heat exchanger 50a and a blower 50b. The air conditioning device 50 is formed, for example, as a dry coil unit (DCU) or an outdoor-mounted air conditioning unit.

[0052] In the air purification system 100 of FIG. 8, conditioned air whose temperature or humidity has been adjusted in the heat exchanger 50a of the air conditioner 50 is introduced as clean air CA into the interior of the fabric duct 10 via the mounting mechanism 20 by the blower 50b of the air conditioner 50. The clean air CA introduced into the interior of the fabric duct 10 is blown out from the outer surface of the fabric duct 10, and the air in the room CR is circulated and purified. The circulated clean air CA is exhausted by an exhaust fan 95 installed on the wall RW and sent to the air conditioner 50. The clean air CA drawn into the air conditioner 50 is temperature-adjusted or humidity-adjusted in the heat exchanger 50a. In the air purification system 100 of FIG. 8, the above cycle is repeated.

[0053] In the air purification system 100 of Figure 8, the fabric duct 10 can be attached to the floor RS, so that clean air CA from the fabric duct 10 can be introduced into narrow spaces such as between production equipment PM, thereby improving the cleanliness of the room CR even in spaces with a lot of production equipment PM.

[0054] In particular, when the distance from the floor RS to the ceiling RC is long (when the ceiling RC is high), if the fabric duct 10 is installed along the ceiling RC, the clean air CA may not circulate all the way to the floor RS. However, in the air purification system 100 of Figure 8, by attaching the fabric duct 10 to the floor RS, the clean air CA can be circulated in the spaces between the production equipment PM and in the spaces where the workers WKR work and exhausted from the exhaust fan 95, thereby improving the cleanliness of the air in the room CR. [Explanation of symbols]

[0055] REFERENCE SIGNS LIST 1 filter member, 1a first filter member, 1b second filter member, 1b1 filter layer, 1b2 protective layer, 5 through hole, 10 fabric duct, 10a inlet, 10b sealing portion, 10b1 first sealing portion, 10b2 second sealing portion, 20 mounting mechanism, 21 first air intake pipe, 21a first flange portion, 21b first tubular portion, 23 second air intake pipe, 23a second flange portion, 23b second tubular portion, 25 fastening member, 25a support portion, 25a1 rubber ring, 25b hinge portion, 25c locking portion, 25c1 screw, 27 packing, 29 fastening member, 30 air intake portion, 50 air conditioning device, 50a heat exchanger, 50b blower, 70 air intake amount adjustment device, 75 exhaust amount adjustment device, 90 supply air fans, 95 exhaust fans, 100 air purification systems.

Claims

1. An air purification system for purifying air in a building, comprising: The air conditioning system is installed on a wall or floor of the building, and includes a fabric duct into which clean air is introduced and which blows out the clean air into the building; The fabric duct is a first filter member having one end serving as an inlet for the clean air, formed in a bag shape, which captures dust particles when the clean air is introduced and allows the clean air to circulate; a second filter member formed in a bag shape on the outside of the first filter member so as to cover the first filter member, and which maintains its shape in a duct shape by the clean air blown out from the first filter member when the clean air is introduced into the first filter member; have Air purification system.

2. The first filter member is formed of a nonwoven fabric, The second filter member is formed of a porous resin film.

10. The air purification system of claim 1.

3. a first air supply pipe having a first flange portion formed on an indoor side through which the clean air is introduced is provided on the wall or the floor; a second air intake pipe having a second flange portion formed on the outside thereof is provided on the inlet side of the first filter member; a fastening member is provided on the outside of the second filter member to clamp the first filter member and the second filter member between the fastening member and the second air intake pipe, A packing is interposed between the first flange portion and the second flange portion, and the first flange portion and the second flange portion are fixed by a fastening member.

3. The air purification system according to claim 1 or 2.

4. A fabric duct that is installed on a wall or floor of a building and introduces clean air into the fabric duct to purify the air inside the building, a first filter member having one end serving as an inlet for the clean air, formed in a bag shape, which captures dust particles when the clean air is introduced and allows the clean air to circulate; a second filter member formed in a bag shape on the outside of the first filter member so as to cover the first filter member, and which maintains its shape in a duct shape by the clean air blown out from the first filter member when the clean air is introduced into the first filter member; Equipped with Fabric duct.

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