air purifier

Abstract

To provide an air purifier in which a gap is unlikely to occur between a filter and the inner wall of an air flow path, and air is unlikely to avoid the filter. [Solution] An air purifier (1) comprising an intake port (11) for drawing in air, an exhaust port (12) for discharging air, an air flow path (10) between the intake port (11) and the exhaust port (12), a filter structure (49) capable of storing an adsorbent (23) for adsorbing substances from the air and through which air can pass with the adsorbent (23) stored inside, a movable structure part (60) for moving the filter structure (49) back and forth to move it in and out of the flow path (10), a contact surface (66) above the movable structure part (60) that is a surface that runs all the way around the inner wall of the flow path (10) on the cross section of the flow path (10), and a lifting device (70) capable of moving the filter structure (49) inserted into the flow path (10) in an up and down direction and lifting it to close the gap between the filter structure (49) and the contact surface (66).

Description

[Technical Field]

[0001] The present invention relates to an air purifier. [Background technology]

[0002] One known device for reducing the concentration of a solvent in the air is one that has an intake port and an exhaust port in a housing, and a filter in the air flow path connecting the intake port and the exhaust port (see Patent Document 1). The filter is a breathable filter container filled with an adsorbent that can adsorb the solvent. In such a device, air containing a large amount of solvent is taken in through the intake port, and the air passes through the filter, removing the solvent from the air. The air, whose solvent concentration has been reduced to below a specified value, is then exhausted through the exhaust port.

[0003] When solvent accumulates in the adsorbent of the filter, the adsorption capacity of the adsorbent decreases. In such cases, the filter is detachable from the device so that treatment can be performed to restore the adsorption capacity of the adsorbent and so that the adsorbent can be replaced as needed. Specifically, a filter support is provided inside the device, and the filter can be inserted into or removed from the support through an opening formed in the device's housing. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 7355352 Summary of the Invention [Problem to be solved by the invention]

[0005] However, if there is a gap between the filter and the inner wall of the air flow path, the air taken in from the intake port will bypass the filter and pass through the gap, causing air with the solvent not yet removed to be exhausted from the exhaust port.

[0006] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an air purifier that is less likely to produce a gap between the filter and the inner wall of the air flow path, making it less likely for air to avoid the filter. [Means for solving the problem]

[0007] The present invention includes the embodiments shown below.

[0008] [1] An air purifier provided with an intake port for drawing in air, an exhaust port for discharging air, an air flow path between the intake port and the exhaust port, a filter structure capable of storing an adsorbent for adsorbing substances from the air and through which air can pass with the adsorbent stored inside, a movable structure portion for moving the filter structure back and forth to move it in and out of the flow path, a contact surface above the movable structure portion that is a surface that runs around the inner wall of the flow path on a cross section of the flow path, and a lifting device capable of moving the filter structure inserted into the flow path in an up and down direction and lifting it to close the gap between the filter structure and the contact surface.

[0009] [2] The air purifier described in [1], wherein the lifting device is a device in which multiple blocks that move up and down simultaneously are lined up in one direction, and multiple lifting devices are lined up in another direction different from the one direction, and the filter structure moves up and down while resting on the blocks at multiple locations in the one direction and multiple locations in the other direction.

[0010] [3] The air purifier described in [1], wherein the moving structure portion includes left and right moving members that slide in the forward and backward directions, the filter structure is movable between the inside and outside of the flow path by being placed on the left and right moving members and moving in the forward and backward directions together with the moving members, the lifting device includes a block that moves in the up and down directions, and inside the flow path, when the block rises and reaches a predetermined height, the filter structure separates from the moving members and rests on the block, and when the block descends and reaches the predetermined height, the filter structure rests on the moving members and separates from the block, and the block rises above the predetermined height, blocking the gap between the filter structure and the contact surface.

[0011] [4] An air purifier described in any one of [1] to [3], wherein the filter structure comprises a filter holding member inserted into the flow path and a filter inserted into a filter insertion hole formed in the filter holding member, and when the filter structure is raised, the gap between the filter holding member and the contact surface is blocked.

[0012] [5] The air purifier described in [4], wherein the filter comprises a cylindrical adsorbent storage section in which the adsorbent is stored and through which air can pass radially, and a flange formed radially outside the upper end of the adsorbent storage section and running around the circumferential direction of the adsorbent storage section, the adsorbent storage section being lower than the filter holding member, the flange resting on top of the filter holding member, and the gap between the lower surface of the flange and the upper surface of the filter holding member being blocked. [Effects of the Invention]

[0013] In the air purifier of the embodiment, the above configuration seals the gap between the filter structure and the contact surface, making it difficult for gaps to form between the filter and the inner wall of the air flow path, and making it difficult for air to bypass the filter. [Brief explanation of the drawings]

[0014] [Figure 1] Front view of the air purifier. [Figure 2]Front view of the inside of the air purifier. [Figure 3] FIG. 10 is a front view of the filter housing section. [Figure 4] FIG. 10 is a top view of the filter housing when the filter structure is protruding forward. [Figure 5] FIG. 2 is a perspective view of a slide rail, a moving member, and a lifting device. [Figure 6] FIG. [Figure 7] FIG. 1 is a cross-sectional view of a leveling block taken along a front-to-rear direction. [Figure 8] FIG. [Figure 9] FIG. [Figure 10] FIG. [Figure 11] FIG. 3 is a cross-sectional view of the filter inserted into the filter insertion hole, taken along a plane passing through the center axis of the filter. [Figure 12] FIG. 12 is an enlarged cross-sectional view of region XII in FIG. 11 (the adsorbent is not shown). [Figure 13] FIG. 12 is an enlarged cross-sectional view of region XIII in FIG. 11 (the adsorbent is not shown). [Figure 14] FIG. 4 is a perspective view of the filter holding member as seen obliquely from above. [Figure 15] FIG. 2 is a perspective view of the filter structure seen from diagonally above. [Figure 16] FIG. 2 is a perspective view of the filter structure seen from diagonally below. [Figure 17] FIG. 10 is a top view of the filter housing portion housing the filter structure. [Figure 18] FIG. 10 is a front view of the filter housing unit showing the filter structure rising. [Figure 19] 4 is a cross-sectional view of a filter holding member with a filter inserted, taken along a plane passing through the central axis of the filter. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0015] First, the overall configuration of the air purifier 1 of this embodiment will be described.

[0016] Air purifier 1 is a device that draws in air with a high solvent concentration in a workplace, removes the solvent from the air, and discharges air with a reduced solvent concentration. As shown in Figures 1 and 2, air purifier 1 includes a housing 2 with an air intake 11 and an exhaust 12, a fan 13 that generates an air flow in an air flow path 10 from the air intake 11 to the exhaust 12, and two filter housings 20a and 20b that are provided in the air flow path 10 as locations for removing the solvent from the air.

[0017] In the following description, the direction in which a filter structure 49 (described later) is removed from the filter accommodating sections 20a and 20b is referred to as the front, and the direction in which the filter structure 49 is inserted into the filter accommodating sections 20a and 20b is referred to as the rear. Furthermore, left and right refer to the left and right when viewed from the front to the rear.

[0018] An intake port 11 for drawing air into the housing 2 is formed on the bottom surface of the housing 2. An exhaust port 12 for discharging air from the housing 2 is formed on the top surface of the housing 2. An air flow path 10 between the intake port 11 and the exhaust port 12 extends in the vertical direction within the housing 2. The cross-sectional shape of the flow path 10 when viewed in a horizontal plane is rectangular.

[0019] A fan 13 is provided at the top of this flow path 10. The rotation axis of the fan 13 extends in the vertical direction. When the fan 13 rotates, an air flow from bottom to top occurs within the flow path 10. Therefore, air outside the device is sucked in through an intake port 11 on the bottom surface of the housing 2, and the sucked air rises within the flow path 10 and is discharged from an exhaust port 12 on the top surface of the housing 2.

[0020] A check damper 11a is provided near the intake port 11 as a backflow prevention device that prevents air from flowing backward. The check damper 11a opens due to the wind pressure while air is being sucked into the housing 2 through the intake port 11, but closes when the wind pressure disappears. As a result, when the fan 13 stops and air is no longer being sucked through the intake port 11, the check damper 11a closes, preventing air with a high solvent concentration inside the housing 2 from flowing backward and leaking out of the apparatus through the intake port 11.

[0021] Casters 4 are attached to the four corners of the underside of the housing 2, making it possible to easily move the air purifier 1. The air around the air purifier 1 passes between the casters 4 and is sucked into the air intake 11.

[0022] The exhaust port 12 is provided in a location that is not directly above the fan 13. Specifically, a horizontal wall 14a is provided directly above the fan 13. Furthermore, vertical walls 14b are provided in three directions among the front, rear, left, and right of the fan 13 (all directions other than the right in FIG. 2). A curved wall 14c that extends away from the fan 13, faces upward, and curves downward in a convex direction is provided in the remaining direction among the front, rear, left, and right of the fan 13 (the right direction in FIG. 2). The exhaust port 12 is provided above the curved wall 14c and next to the horizontal wall 14a. The horizontal wall 14a, the vertical wall 14b, and the curved wall 14c are part of the inner wall of the air flow path 10.

[0023] Air flows from fan 13 in the direction of the centrifugal force, and the air flows along curved wall 14c and is discharged to the outside of the device through exhaust port 12. With this configuration, compared to when exhaust port 12 is provided directly above fan 13, the sound of fan 13 is less likely to leak to the outside of the device, and air is less likely to be drawn in near exhaust port 12.

[0024] The two filter housing sections 20a, 20b are provided in the air flow path 10 and below the fan 13. The two filter housing sections 20a, 20b include a first filter housing section 20a on the lower side (i.e., the upstream side of the air flow) and a second filter housing section 20b on the upper side (i.e., the downstream side of the air flow).

[0025] The first filter accommodating portion 20a and the second filter accommodating portion 20b each accommodate and hold a filter structure 49. Air flowing through the flow path 10 passes through the filter structure 49 inserted in the first filter accommodating portion 20a, and then passes through the filter structure 49 inserted in the second filter accommodating portion 20b. The filter structure 49 in the first filter accommodating portion 20a is intended to remove solvents from the air sucked in through the air intake port 11, thereby keeping the solvent concentration in the air at or below a specified value. On the other hand, the filter structure 49 in the second filter accommodating portion 20b is provided as a spare in case the filter structure 49 in the first filter accommodating portion 20a breaks through. The structures of the first filter accommodating portion 20a, the second filter accommodating portion 20b, and the filter structure 49 will be described later.

[0026] Air filters 3a, 3b made of nonwoven fabric are provided between the air intake 11 and the first filter housing portion 20a, and between the second filter housing portion 20b and the fan 13, respectively. These air filters 3a, 3b are provided to block the air flow path 10, so that air flowing through the flow path 10 always passes through the air filters 3a, 3b. The lower air filter 3a removes dust from the air sucked in through the air intake 11. The upper air filter 3b removes powder and the like generated in the filter housing portions 20a, 20b from the air that has passed through the first filter housing portion 20a and the second filter housing portion 20b.

[0027] A control panel box 5 is also provided within the housing 2. A main sensor and a backup sensor are housed inside the control panel box 5 as sensors for measuring the concentration of the solvent in the air. Although not shown, a sampling port for air sent to the main sensor is provided between the first filter housing portion 20a and the second filter housing portion 20b, and a sampling port for air sent to the backup sensor is provided between the upper air filter 3b and the fan 13.

[0028] While the air purifier 1 is operating, the main sensor measures the solvent concentration in the air, and if the measured value exceeds a specified value, an alarm is activated. In addition, in preparation for a malfunction of the main sensor, while the air purifier 1 is operating, the backup sensor also measures the solvent concentration in the air, and if the measured value exceeds a specified value, an alarm is activated.

[0029] Examples of solvents to be removed by the air purifier 1 include various volatile organic solvents such as methyl ethyl ketone (MEK), isopropyl alcohol (IPA), methanol, ethanol, toluene, xylene, and acetone. Granular adsorbents 23 capable of adsorbing these solvents are used in the filter housings 20a and 20b. Zeolite (porous crystalline aluminosilicate) is a particularly preferred adsorbent 23 due to its excellent solvent adsorption, ability to be regenerated in a short time, and minimal loss during regeneration. The average particle size of the adsorbent 23 is not limited, but is, for example, 1.2 to 1.6 mm.

[0030] Next, a description will be given of the first filter accommodating portion 20a and the second filter accommodating portion 20. Since the first filter accommodating portion 20a and the second filter accommodating portion 20 have the same structure, the first filter accommodating portion 20a will be described as a representative.

[0031] The first filter housing portion 20a is located within the air flow path 10 in the housing 2. As shown in Figures 3 and 4, an opening 20a-2 is formed in the housing 2 at a location corresponding to the front of the first filter housing portion 20a.

[0032] 3 and 4, the first filter accommodating section 20a is provided with a moving structure part 60 for moving the filter structure 49 in and out of the flow path 10 (first filter accommodating section 20a), a protruding wall 65 that is a wall that protrudes into the flow path 10 above the moving structure part 60, and a lifting device 70 that raises the filter structure 49 inserted into the flow path 10 and brings it into close contact with the protruding wall 65. In Fig. 4, part of the first filter accommodating section 20a that is relatively high up, specifically part of the moving structure part 60, the protruding wall 65, and the filter structure 49, are shown by two-dot chain lines.

[0033] 3 and 4, the moving structure 60 includes a mounting structure 61 fixed to the left and right inner walls of the flow path 10, and slide rails 62 attached to the mounting structure 61 on both the left and right sides. As shown in Figures 4 and 5, the slide rail 62 includes an outer rail 62a fixed to the mounting structure 61, an intermediate rail 62b that moves in the front-to-rear direction along the outer rail 62a, and an inner rail 62c that moves in the front-to-rear direction along the intermediate rail 62b.

[0034] A moving member 63 is attached as part of the moving structure 60 to the inner rail 62c, which is the part of the slide rail 62 that slides furthest forward. Guide portions 63a that protrude toward the center of the flow path 10 in the left-right direction are provided at two locations, front and rear, of the moving member 63.

[0035] The movable members 63, together with the inner rails 62c, can slide between the interior of the first filter housing portion 20a (inside the flow path 10) and a location in front of the front opening 20a-2 of the first filter housing portion 20a. The filter structure 49 is placed on the left and right movable members 63 as shown by the arrows in Fig. 5 and is fitted between the front and rear guide portions 63a. While placed on the left and right movable members 63, the filter structure 49 can move between the interior of the first filter housing portion 20a (inside the flow path 10) and a location in front of the front opening 20a-2 of the first filter housing portion 20a.

[0036] The protruding wall 65 is located at the top of the first filter housing portion 20a, and is above the moving structure portion 60 as shown in Fig. 3. As shown in Fig. 4, the protruding wall 65 is a wall that runs all the way around the inner wall of the flow path 10 on the cross section of the flow path 10 when the cross section is taken along a horizontal plane. Air can rise in the area surrounded by the protruding wall 65. The lower surface of the protruding wall 65 is a horizontal surface, and is a contact surface 66 to which the filter structure 49 is in close contact as described below.

[0037] The lifting device 70 has a leveling block structure. As shown in Figures 3 and 4, the lifting device 70 is provided on both the left and right sides of the air flow path 10. The lifting device 70 is located at the bottom of the first filter housing portion 20a, below the moving structure portion 60. The lifting device 70 is located between the left and right moving members 63 in the left-right direction.

[0038] The two lifting devices 70 on the left and right have the same structure. As shown in Fig. 6, the lifting device 70 includes a connecting member 71, a support member 72, a screw shaft 73, a wedge 74, a guide member 75, and a block 76.

[0039] The connecting member 71 is a member that spans the air flow path 10 in the front-to-rear direction. Support members 72 rise upward near both the front and rear ends of the connecting member 71. A screw shaft 73 is rotatably supported by these support members 72. A thread is formed on the surface of the screw shaft 73 between the front and rear support members 72. Wedges 74 are attached to two locations in the front-to-rear direction on the threaded portion. The lower surface of the wedge 74 and the upper surface of the connecting member 71 are both horizontal surfaces and are in surface contact. The upper surface of the wedge 74 is inclined relative to the horizontal plane, with the front lower and the rear higher.

[0040] The portion consisting of the screw shaft 73 and the wedges 74 has a structure similar to that of a ball screw. When the screw shaft 73 rotates, the two wedges 74, one at the front and one at the rear, simultaneously move in the front-rear direction along the screw shaft 73 in the same manner as the nuts of a ball screw. At this time, each wedge 74 slides on the connecting member 71.

[0041] Guide members 75 are fixed to the upper surface of the connecting member 71 at two locations in the front-to-rear direction. The guide members 75 sandwich the wedge 74 from the left and right. A block 76 is provided on the wedge 74 at the location of each guide member 75. The block 76 is guided by the guide members 75 and cannot move in the front-to-rear or left-to-right directions, but can move in the up-and-down direction. The lower surface of the block 76 is inclined relative to the horizontal plane and is in surface contact with the upper surface of the wedge 74.

[0042] Due to this structure, when the screw shaft 73 rotates and the wedge 74 moves forward and backward, the block 76 moves up and down. Specifically, when the wedge 74 moves forward as shown in Figure 7(a), the upper surface of the wedge 74 pushes up the block 76. Conversely, when the wedge 74 moves backward as shown in Figure 7(b), the block 76 moves down.

[0043] As described above, the left and right lifting devices 70 have the same structure, so that two blocks 76 are provided on each side. These blocks 76 are used to push up the filter structure 49 housed in the first filter housing portion 20a in the flow path 10 and bring it into close contact with the contact surface 66 of the protruding wall 65.

[0044] Next, the filter structure 49 housed in each of the first filter housing portion 20a and the second filter housing portion 20b will be described. The filter structure 49 is a filter holding member 40 into which a plurality of filters 21 are inserted.

[0045] First, the filter 21 will be described with reference to Figures 8 to 13. The filter 21 is configured such that a large number of adsorbents 23 for adsorbing solvents in the air are packed in a filter container 22.

[0046] The filter container 22 comprises an outer cylinder 24, an inner cylinder 25 arranged radially inside the outer cylinder 24, a single plate-shaped upper blocking member 27 at the top that blocks the space between the outer cylinder 24 and the inner cylinder 25, and a lid 26 that blocks the lower openings of the outer cylinder 24 and the inner cylinder 25.

[0047] 12 and 13, the outer cylinder 24 and the inner cylinder 25 have a double structure in which ventilation plates 24a, 25a and meshes 24b, 25b are overlapped, respectively. At the upper and lower ends of the outer cylinder 24 and the inner cylinder 25, the ventilation plates 24a, 25a are folded toward the meshes 24b, 25b, and the upper and lower ends of the meshes 24b, 25b are sandwiched between the ventilation plates 24a, 25a, thereby fixing the meshes 24b, 25b to the ventilation plates 24a, 25a.

[0048] The ventilation plates 24a, 25a are formed with a large number of ventilation holes 24c, 25c penetrating the ventilation plates 24a, 25a, respectively. Each ventilation hole 24c, 25c is circular and large enough to allow the passage of granular adsorbent 23. A portion of the upper region of the ventilation plates 24a, 25a is a non-ventilation region 33 (see FIG. 11) where air cannot pass in the radial direction of the cylinders 24, 25 due to the absence of ventilation holes 24c, 25c. The region of the ventilation plates 24a, 25a below the non-ventilation region 33 is a ventilation region 32 (see FIG. 11) where air can pass in the radial direction of the cylinders 24, 25 due to the periodic arrangement of a large number of ventilation plates 24a, 25a.

[0049] 8 to 10, only some of the ventilation holes 24c, 25c are depicted as representative examples. However, in reality, the ventilation holes 24c, 25c are periodically arranged in the outer cylinder 24 and the inner cylinder 25 throughout the ventilation region 32.

[0050] Nets 24b, 25b are made by weaving together a number of wires extending vertically and a number of wires extending horizontally into a mesh shape. Nets 24b, 25b are breathable as a whole. The gaps between nets 24b, 25b (gaps surrounded by the vertical and horizontal wires) have an area smaller than that of ventilation holes 24c, 25c in ventilation plates 24a, 25a, and are large enough that granular adsorbent 23 cannot pass through.

[0051] 10 and 11, the opening at the bottom of the inner cylindrical body 25 is closed by an inner blocking member 25d, which is a circular plate. More precisely, the inner blocking member 25d is fitted onto the inner diameter side of the lower end of the inner cylindrical body 25, and the inner blocking member 25d and the inner cylindrical body 25 are welded together along the entire circumference. This prevents air from entering the radially inner area of ​​the inner cylindrical body 25 from below. As shown in FIG. 10, the inner blocking member 25d has threaded holes 25f that penetrate the inner blocking member 25d from top to bottom at multiple locations.

[0052] As shown in FIG. 8 and other figures, the upper blocking member 27 is a substantially circular plate with a hole 27a in the center. The entire upper end of the outer cylinder 24 is welded to the upper blocking member 27. The outer diameter of the upper blocking member 27 is larger than the diameter of the outer cylinder 24. The portion of the upper blocking member 27 that extends radially outward from the outer cylinder 24 forms a flange 27b that surrounds the outer cylinder 24 in the circumferential direction. The inner diameter of the upper blocking member 27 (the diameter of the hole 27a) is the same as the inner diameter of the inner cylinder 25. The entire upper end of the inner cylinder 25 is welded to the entire inner diameter portion of the hole 27a in the upper blocking member 27. By welding the entire upper ends of the outer cylinder 24 and the inner cylinder 25 to the upper blocking member 27, air cannot escape directly upward from the space between the outer cylinder 24 and the inner cylinder 25.

[0053] 8 and other figures, a rod-shaped handle 28 is provided to bridge two opposing positions of the hole 27a of the upper blocking member 27. The operator can hold the handle 28 and lift up the entire filter 21.

[0054] As shown in Figures 9 to 11, the lid 26 is made up of a circular plate 26a and a frame 26b that surrounds the plate 26a along the edge of the plate 26a. The lid 26 fits onto the outer cylindrical body 24 from below, closing the lower opening of the outer cylindrical body 24 from below. This prevents air from entering the radially inner area of ​​the outer cylindrical body 24 from below. When the lid 26 is fitted onto the outer cylindrical body 24, the plate 26a of the lid 26 comes into contact with the inner closing member 25d from below, and the frame 26b of the lid 26 comes into contact with or is close to the outer peripheral surface of the outer cylindrical body 24, as shown in Figures 11 and 13.

[0055] As shown in Figure 10, the lid 26 has threaded holes 26c at multiple locations that penetrate the lid 26 from top to bottom. The lid 26 is fitted onto the outer cylindrical body 24 from below, screws 31a are passed through the threaded holes 26c of the lid 26 and the threaded holes 25f of the inner blocking member 25d from below, and nuts 31b (see Figure 11) are tightened from above the inner blocking member 25d, thereby fixing the lid 26 in contact with the inner blocking member 25d. A silicone washer 26e is sandwiched between the head of the screw 31a and the lid 26. This washer 26e is a seal to maintain airtightness between the head of the screw 31a and the underside of the lid 26.

[0056] In this specification, a seal refers to something that is sandwiched between two things to increase airtightness, such as a gasket or packing.

[0057] The area surrounded by the outer cylinder 24, the inner cylinder 25, the upper blocking member 27, and the lid 26 is the adsorbent storage section 30, which is filled with the adsorbent 23. The adsorbent storage section 30 can be said to have a cylindrical shape that is thick in the radial direction.

[0058] 11, in such a filter container 22, the adsorbent 23 is filled up to the upper end of the adsorbent storage section 30. An operator can remove the screw 31a to remove the lid 26, and then refill the adsorbent 23 in the adsorbent storage section 30.

[0059] Air can pass through the adsorbent storage section 30 and move radially between the cylinders 24, 25, between a location radially outside the outer cylinder 24 and a location radially inside the inner cylinder 25. In addition, air cannot pass through any part other than the outer cylinder 24 and the inner cylinder 25.

[0060] Next, the filter holding member 40 will be described with reference to FIG. 14. The filter holding member 40 is a rectangular plate-like member when viewed from above. The filter holding member 40 is disposed perpendicular to the direction of air flow, i.e., horizontally. As part of the filter holding member 40, walls 40a are provided that extend downward from the upper surface of the filter holding member 40 and along the four sides of the rectangle. Furthermore, as part of the filter holding member 40, edge portions 40b are provided that extend further to the left and right from the upper ends of the walls 40a on both the left and right sides. These edge portions 40b are portions that rest on the left and right moving members 63, as shown in FIGS. 3, 5, and 18.

[0061] The filter holding member 40 has a total of six filter insertion holes 41, three on the left and right sides and two on the front and back sides. The filter insertion holes 41 are holes that penetrate the filter holding member 40 in the vertical direction. A filter 21 is inserted into each of these filter insertion holes 41.

[0062] The inner diameter of the filter insertion holes 41 is slightly larger than the diameter of the cylindrical portion of the outer cylinder 24 and smaller than the diameter of the flange 27b of the filter 21. In addition, circular seals 42 that surround the filter insertion holes 41 are provided around each filter insertion hole 41 and on the upper surface of the filter holding member 40 as part of the filter structure 49.

[0063] As shown in Figures 15 and 16, one filter 21 is inserted into each of the filter insertion holes 41. When the filter 21 is inserted into the filter insertion hole 41 from above, the adsorbent storage section 30 of the filter 21 passes through the filter insertion hole 41 and is positioned below the filter insertion hole 41, as shown in Figures 11 and 12, and the entire ventilation area 32 of the outer cylindrical body 24 and the inner cylindrical body 25 is positioned below the filter insertion hole 41. Furthermore, when the filter 21 is inserted into the filter insertion hole 41 from above, the flange 27b of the filter 21 rests on the area surrounding the filter insertion hole 41. More specifically, the lower surface of the flange 27b of the filter 21 is in close contact with the seal 42 surrounding the filter insertion hole 41, around the entire circumference of the flange 27b. This prevents air from passing between the lower surface of the flange 27b and the upper surface of the filter holding member 40.

[0064] 15, pressing members 43, which are part of a filter structure 49, press the upper blocking member 27 of the filter 21 inserted into the filter insertion hole 41 toward the filter holding member 40. The pressing members 43 are plates that are long in the left-right direction and have a constant width in the front-rear direction. Three pressing members 43 are provided for one filter holding member 40.

[0065] At the front of the filter holding member 40, one pressing member 43 presses down from above the front portions of the upper blocking members 27 of the three filters 21 lined up in a row. At the rear of the filter holding member 40, one pressing member 43 presses down from above the rear portions of the upper blocking members 27 of the three filters 21 lined up in a row. At the center of the filter holding member 40 in the front-to-rear direction, one pressing member 43 presses down from above the upper blocking members 27 of all of the filters 21 lined up in two rows. As shown in FIG. 15 , each pressing member 43 is fixed to the filter holding member 40 by a screw 44 serving as a fastener.

[0066] Because the filter holding member 40 and the filter 21 are configured as described above, in order for air below the filter holding member 40 to flow above the filter holding member 40, it must flow from a location radially outside the outer cylinder 24, pass through the adsorbent storage section 30, exit to a location radially inside the inner cylinder 25, and then rise through the radially inside location of the inner cylinder 25 to flow above the filter holding member 40, as shown by the arrows in Figure 11.

[0067] 14 and 15 , a seal 48 is provided as part of a filter structure 49 on the upper surface of the filter holding member 40, in locations along the four sides of the rectangle when viewed from above. This seal 48 goes all the way around the edge of the filter holding member 40. As a structure for attaching this seal 48, slight raised portions 47 are formed along the four sides of the filter holding member 40. The seal 48 is attached to the raised portions 47. The seal 48 is a sealing member that prevents air from passing between the filter holding member 40 of the filter structure 49 and the contact surface 66 when the filter structure 49 is in close contact with the contact surface 66 of the protruding wall 65.

[0068] As shown in FIG. 16, contact members 77 are provided as part of the filter structure 49 at two locations, left and right, on the underside of the filter holding member 40. Each contact member 77 is composed of downward extension portions 77a extending downward at two locations, front and rear, of the filter holding member 40, and front-rear extension portions 77b connecting the lower ends of the front and rear downward extension portions 77a and extending in the front-rear direction. The lower end surface of the contact member 77 (the lower surface of the front-rear extension portion 77b) is a horizontal plane. The lower end surface of the contact member 77 is located below the lower end of the filter 21 inserted into the filter holding member 40. As shown in FIG. 3 and other figures, the left and right contact members 77 are each located above the lifting device 70.

[0069] When the filter structure 49 is housed in the filter housing portions 20a and 20b, as shown in FIG. 3 and other figures, the two right-side blocks 76 are located below the right-side contact member 77, and the two left-side blocks 76 are located below the left-side contact member 77. When the four blocks 76 rise to a predetermined height, they come into contact with the lower end surface of the contact member 77.

[0070] A filter structure 49, in which the filter 21 is inserted into the filter holding member 40, is housed in the first filter accommodating section 20a and the second filter accommodating section 20b, as shown in Fig. 3. The filter structure 49 is the entire portion that is moved in and out of the filter accommodating sections 20a and 20b using the moving structure part 60.

[0071] The front openings 20a-2 and 20b-2 of the first filter housing portion 20a and the second filter housing portion 20b can be opened and closed by single-wing doors 20a-1 and 20b-1 shown in Fig. 1 . Specifically, the door 20a-1 is attached to the housing 2 by a hinge 35 on the right side of the front opening 20a-2 of the first filter housing portion 20a. A handle 36 is attached to the left side of the door 20a-1, and an operator can open or close the door 20a-1 by holding the handle 36 and pulling the left side of the door 20a-1 forward or pushing it backward. Using the same configuration, the front opening 20b-2 of the second filter housing portion 20b can also be opened and closed by the door 20b-1.

[0072] However, if the filter structures 49 protrude forward from both the first filter housing portion 20a and the second filter housing portion 20b, the weight of the two filter structures 49 may cause the air purifier 1 to lose balance. To prevent this from happening, a locking mechanism is provided that allows only one of the two doors 20a-1, 20b-1 to be opened.

[0073] 1, the locking mechanism includes a guide member 37 and a plate 38. The guide member 37 is a member that is long in the vertical direction and is fixed to the side of the doors 20a-1 and 20b-1. The plate 38 is a plate-like member that is guided by the guide member 37 and can move in the vertical direction.

[0074] The plate 38 can move up and down between a first position in front of the door 20a-1 of the first filter housing portion 20a and a second position in front of the door 20b-1 of the second filter housing portion 20b, while being guided by the guide member 37. At each of the first and second positions, the plate 38 can be fixed with screws (not shown) to prevent it from moving up and down.

[0075] The lower limit position of the movable range of plate 38 is the first position, and the upper limit position is the second position, and the distance between the first position and the second position is small compared to the vertical length of plate 38. Therefore, plate 38 is always located in front of at least one of the two doors 20a-1, 20b-1.

[0076] If plate 38 is placed in front of either door 20a-1 or 20b-1, plate 38 will press down on that door, preventing it from opening. To open one of the two doors 20a-1 or 20b-1, plate 38 must be moved in front of the other door 20a-1 or 20b-1, preventing that door 20a-1 or 20b-1 from opening. This inevitably prevents the two doors 20a-1 and 20b-1 from opening at the same time.

[0077] Such an air purifier 1 is placed in a workplace where solvents are used, such as a workplace where painting or degreasing is performed. In a workplace where solvents are used, the solvent evaporates. Because the evaporated solvent has a high specific gravity, it accumulates near the floor of the workplace. As a result, the air near the floor has a high solvent concentration. The air is sucked into the air intake 11 on the underside of the housing 2 and purified as it passes through the first filter housing portion 20a and the second filter housing portion 20b.

[0078] Although not shown, a hose may be attached to the intake port 11, and the suction port of the hose may be located at a location where air with a high solvent concentration accumulates, thereby sucking in the air from that location. In addition to a hose, various other items may be attached to the intake port 11 depending on the application.

[0079] Next, a method for accommodating the filter structure 49 in the first filter accommodating portion 20a will be described.

[0080] First, it is assumed that the filter holding member 40 is housed in the first filter housing portion 20a while being placed on the left and right moving members 63 of the moving structure portion 60. At this point, it is assumed that the filter 21 is not inserted into the filter holding member 40.

[0081] Next, the worker opens the door 20a-1 of the first filter accommodating section 20a and pulls the filter holding member 40 forward. Then, the moving member 63 and the filter holding member 40 placed thereon are guided by the left and right slide rails 62 and pulled forward beyond the front opening 20a-2 of the first filter accommodating section 20a, as shown in FIG.

[0082] Next, the worker inserts filters 21 into all of the filter insertion holes 41 of the filter holding member 40 shown in Fig. 14 and presses down the upper blocking members 27 of those filters 21 with the pressing members 43. This completes the filter structure 49 shown in Figs. 15 and 16.

[0083] Next, the worker pushes the filter structure 49 rearward. The filter structure 49 and the movable members 63 carrying it are then guided by the left and right slide rails 62 and slide rearward, causing the filter structure 49 to be housed in the first filter housing section 20a as shown in FIG. 17. At this point, there are blocks 76 below the contact members 77 of the filter structure 49, but as shown in FIG. 18(a), all of the blocks 76 are lowered and are not in contact with the contact members 77 of the filter structure 49. Also, at this point, the filter structure 49 is resting on the left and right movable members 63 and is separated from the upper protruding wall 65.

[0084] Next, the worker rotates the screw shaft 73 of one of the left and right lifting devices 70 to move the two front and rear wedges 74 forward and push up the two front and rear blocks 76. The worker also rotates the screw shaft 73 of the other of the left and right lifting devices 70 to similarly push up the two front and rear blocks 76.

[0085] When these blocks 76 rise and reach a predetermined height, the blocks 76 come into contact with the contact members 77 of the filter structure 49, as shown in Figure 18(b). As the blocks 76 rise further, the filter structure 49 rests on the blocks 76 and is pushed up, separating from the left and right moving members 63. This means that the support for the filter structure 49 is switched from the moving members 63 to the blocks 76.

[0086] 18(c), the seal 48 of the filter holding member 40 comes into close contact with the contact surface 66, which is the lower surface of the protruding wall 65. This prevents air from passing between the filter structure 49 and the contact surface 66. The only path for air to pass from the space below the filter holding member 40 to the space above the filter holding member 40 is the adsorbent storage section 30 of the filter 21.

[0087] Next, the worker closes the front opening 20a-2 of the first filter housing portion 20a with the door 20a-1.

[0088] In the same manner, a filter structure 49 including the filter 21 is also accommodated in the second filter accommodating portion 20b.

[0089] Next, the operation of the air purifier 1 in a state where the filter structures 49 are housed in each of the two filter housing portions 20a, 20b will be described.

[0090] When air purifier 1 is operating, fan 13 rotates, and air with a high solvent concentration is drawn in through intake port 11 and rises together through air flow path 10. Upon reaching first filter housing section 20a, the air branches off and passes through each of multiple filters 21, and then rises together again.

[0091] 11 and 19, air that has reached the lower surface of the filter holding member 40 and a location radially outward from the filter 21 is introduced into the adsorbent storage section 30 through the ventilation region 32 of the outer cylinder 24, passes through the adsorbent storage section 30, and exits through the ventilation region 32 of the inner cylinder 25 to a location radially inward from the inner cylinder 25. As the air passes through the adsorbent storage section 30, the solvent in the air is adsorbed by the adsorbent 23 and removed from the air. This reduces the solvent concentration in the air. The air with a reduced solvent concentration that has exited the adsorbent storage section 30 rises at a location radially inward from the inner cylinder 25.

[0092] Such air flow around the filters 21 and the action of the adsorbent 23 occur in all of the filters 21 inserted into the filter holding member 40 of the first filter housing portion 20a. As a result, the solvent concentration in the air that has passed through the first filter housing portion 20a becomes equal to or lower than the specified value. The air that has passed through the multiple filters 21 rises together toward the second filter housing portion 20b.

[0093] The air then passes through the filter 21 of the second filter housing portion 20b. The same air flow as that of the first filter housing portion 20a occurs in the second filter housing portion 20b. Therefore, even if the filter 21 of the first filter housing portion 20a breaks through, the air with a high solvent concentration passes through the filter 21 of the second filter housing portion 20b, and becomes air with a solvent concentration below the specified value.

[0094] The air that has passed through the second filter housing portion 20b and whose solvent concentration has become equal to or lower than the specified value continues to rise and is discharged from the exhaust port 12 to the outside of the device.

[0095] Incidentally, as the operating time of the air purifier 1 increases, the solvent accumulates in the adsorbent 23 of the filter 21, reducing the adsorption capacity. Therefore, it is preferable to replace the filter 21 periodically.

[0096] When replacing the filter 21, the worker first stops the operation of the air purifier 1. Next, the worker opens the door 20a-1 of the first filter housing section 20a and lowers all of the blocks 76 by rotating the left and right screw shafts 73. When the blocks 76 are lowered, the filter structure 49 placed on the blocks 76 also lowers.

[0097] When the block 76 descends and reaches a predetermined height, the filter structure 49 rests on the left and right movable members 63 (see FIG. 18(b)). The block 76 continues to descend thereafter, but since the filter structure 49 is resting on the movable members 63, it does not descend any further, and the block 76 separates from the filter structure 49 and descends to the bottom of its movable range (see FIG. 18(a)). In this way, the support for the filter structure 49 is switched from the block 76 to the movable members 63.

[0098] Next, the worker pulls the filter structure 49 forward, causing the filter structure 49 to slide forward together with the moving member 63. The worker replaces the filter 21 of the filter structure 49 that has come forward.

[0099] In the same manner, the worker can replace the filter 21 in the second filter housing portion 20b.

[0100] Next, the effects of this embodiment will be described.

[0101] The air purifier 1 of this embodiment is provided with a moving structure 60 for moving the filter structure 49 in the front-rear direction to move it in and out of the air flow path 10 (specifically, the filter housing sections 20a and 20b). This allows an operator to easily move the filter structure 49 in and out of the filter housing sections 20a and 20b.

[0102] Furthermore, above the moving structure portion 60, a protruding wall 65 is provided that goes all the way around the inner wall of the flow path 10, with the underside of the protruding wall 65 forming a contact surface 66. Furthermore, the filter accommodating portions 20a, 20b are provided with an elevator device 70 that moves the filter structure 49 up and down. The elevator device 70 raises the filter structure 49 inserted into the filter accommodating portions 20a, 20b, closing the gap between the filter structure 49 and the contact surface 66 of the protruding wall 65. This makes it less likely that a gap will form between the filter structure 49 and the air flow path 10, making it less likely that air will avoid the filter 21 of the filter structure 49.

[0103] The lifting device 70 is a device in which two blocks 76 that simultaneously move up and down are arranged in the front-to-back direction. The two lifting devices 70 are also arranged in the left-to-right direction. This allows the filter structure 49 to be placed on the blocks 76 and move up and down at two locations in the front-to-back direction and two locations in the left-to-right direction. This makes it easy for the entire filter structure 49 to come into close contact with the contact surface 66.

[0104] The lifting device 70 also includes a screw shaft 73, a wedge 74 that moves horizontally as the screw shaft 73 rotates, and a block 76 that moves up and down as the wedge 74 moves. In this way, with a simple structure and the easy operation of rotating the screw shaft 73, the filter structure 49 placed on the block 76 can be moved up and down.

[0105] Furthermore, the moving structure portion 60 is provided with left and right moving members 63 that slide in the front-to-rear direction, and the filter structure 49 is placed on the left and right moving members 63 and can move in the front-to-rear direction together with the moving members 63. This allows the filter structure 49 to easily slide in the front-to-rear direction and move between the inside and outside of the air flow path 10 (specifically, the filter housing portions 20a, 20b).

[0106] Furthermore, inside the flow path 10, when the block 76 rises and reaches a predetermined height, the filter structure 49 moves away from the moving member 63 and rests on the block 76, and when the block 76 moves down and reaches the predetermined height, the filter structure 49 rests on the moving member 63 and moves away from the block 76. Then, the block 76 rises above the predetermined height, and the gap between the filter structure 49 and the contact surface 66 is blocked.

[0107] In this way, simply by moving the block 76 in the vertical direction, the support for the filter structure 49 can be easily switched between the moving member 63, which moves in the front-to-back direction, and the block 76, which moves in the vertical direction. Also, it is possible to easily place the filter structure 49 on the moving member 63 and take it in and out of the air flow path 10 (specifically, the filter accommodating sections 20a, 20b), and it is also possible to place the filter structure 49 on the block 76, raise it, and bring it into close contact with the contact surface 66 of the flow path 10.

[0108] Furthermore, since the filter structure 49 includes the filter holding member 40 inserted into the filter accommodating portions 20a and 20b, and the filter 21 inserted into the filter insertion hole 41 formed in the filter holding member 40, when replacing the filter 21, it is not necessary to replace the entire filter structure 49, but it is sufficient to replace only the filter 21. Therefore, replacement of the filter 21 is easy.

[0109] Furthermore, because the filter holding member 40 has a simple structure in which the filter insertion hole 41 is formed in a plate-like member, both the filter holding member 40 and the entire filter structure 49 including the filter holding member 40 are light in weight. This allows the operator to easily insert and remove the filter structure 49 into and from the filter accommodating portions 20a and 20b.

[0110] Furthermore, multiple filters 21 are provided for one filter holding member 40, and since each filter 21 is small, the area where the filter 21 must be tightly attached to the surrounding area of ​​the filter insertion hole 41 is short, making it easier to maintain tight attachment.

[0111] The filter 21 also includes a cylindrical adsorbent storage section 30 that stores the adsorbent 23 therein and through which air can pass in the radial direction, and a flange 27b that is formed radially outward from the upper end of the adsorbent storage section 30 and that runs around the circumferential direction of the adsorbent storage section 30. The adsorbent storage section 30 is located below the filter insertion hole 41 of the filter holding member 40, and the flange 27b rests on the filter holding member 40, blocking the gap between the lower surface of the flange 27b and the upper surface of the filter holding member 40. With this configuration, an operator can install the filter 21 in the filter holding member 40 with the simple operation of inserting the filter 21 into the filter insertion hole 41 from above, and further, this simple operation can prevent air from passing between the lower surface of the flange 27b and the upper surface of the filter holding member 40.

[0112] Furthermore, since the pressing member 43 presses the upper blocking member 27 of the filter 21 inserted into the filter insertion hole 41 toward the filter holding member 40, air is less likely to pass between the filter 21 and the filter holding member 40. Furthermore, since one pressing member 43 presses the upper blocking members 27 of multiple filters 21, the work of attaching the pressing member 43 is efficient.

[0113] The above-described embodiments are merely examples, and any modifications that do not deviate from the spirit of the present invention are considered to be included in the scope of the present invention. For example, the following modifications can be made to the above-described embodiments. The following multiple modification examples can be combined in any way.

[0114] In addition to solvents, the air purifier 1 of this embodiment can remove various substances such as odor-causing substances from the air by adsorbing them onto the adsorbent 23. The type of adsorbent 23 stored in the adsorbent storage section 30 and the type of sensor used in the air purifier 1 are selected appropriately depending on the adsorbed substances to be removed from the air.

[0115] Furthermore, the structure of the filter structure is not limited to the above-described structure in which the filter 21 is inserted into the filter holding member 40. For example, the filter structure may be a rectangular parallelepiped of a size that allows it to be in close contact with the contact surface 66 of the protruding wall 65 from below, with an adsorbent stored inside and allowing air to pass through in the vertical direction.

[0116] Furthermore, when the filter structure includes a filter holding member and a filter as in the above embodiment, the number, arrangement, structure, and shape of the filters are not limited to those in the above embodiment.

[0117] For example, in the case where the filter includes an outer cylinder and an inner cylinder as described above, the outer cylinder and the inner cylinder may each have a single structure consisting of a single plate with holes, and the lid that closes the adsorbent storage section between the outer cylinder and the inner cylinder may be on the upper side of the filter.

[0118] Furthermore, the shape of the filter holding member is not limited to that of the above embodiment. The filter holding member is preferably a simple plate-like member having a filter insertion hole formed therein, but such plate-like members may also have slight irregularities. The wall 40a and the rising portion 47 in the above embodiment are examples of such slight irregularities.

[0119] Furthermore, the structure of the moving structure portion for moving the filter structure 49 is not limited to the structure of the above embodiment, as long as it can move the filter structure 49 in the front-to-rear direction to put it in and take it out of the air flow path 10 (specifically, the filter housing portions 20a and 20b). However, in terms of making it easier to move the filter structure 49, a structure in which the filter structure 49 slides and moves simply by the operator pushing or pulling the filter structure 49 is preferred.

[0120] Furthermore, in the lifting device 70 of the above embodiment, two blocks 76 are lined up in the front-to-rear direction, but the number of blocks 76 included in one lifting device and the direction in which the blocks 76 are lined up are not limited to this. The number of blocks 76 included in one lifting device may be three or more, and the direction in which the multiple blocks 76 are lined up in one lifting device may be the left-to-right direction, etc. Furthermore, the number of lifting devices 70 provided in the air flow path 10 and the direction in which the multiple lifting devices 70 are lined up are also not limited to those in the above embodiment.

[0121] In addition, the seal 42 sandwiched between the flange 27b of the filter 21 and the filter holding member 40 is attached to the upper surface of the filter holding member 40 in the above embodiment, but it may alternatively be attached to the lower surface of the flange 27b. In addition, the seal 48 sandwiched between the filter holding member 40 and the contact surface 66 of the protruding wall 65 in the air flow path 10 is attached to the upper surface of the filter holding member 40 in the above embodiment, but it may alternatively be attached to the contact surface 66 of the protruding wall 65.

[0122] In addition to the above, various other changes are possible. [Explanation of symbols]

[0123] 1...air purifier, 2...housing, 3a...air filter, 3b...air filter, 4...caster, 5...control panel box, 10...flow path, 11...air intake port, 11a...check damper, 12...exhaust port, 13...fan, 14a...horizontal wall, 14b...vertical wall, 14c...curved wall, 20a...first filter housing section, 20a-1...door, 20a-2...opening, 20b...second filter housing section, 20b-1...door, 20b -2...opening, 21...filter, 22...filter container, 23...adsorbent, 24...outer cylinder, 24a...ventilation plate, 24b...net, 24c...vent hole, 25...inner cylinder, 25a...ventilation plate, 25b...net, 25c...vent hole, 25d...inner blocking member, 25f...screw hole, 26...lid, 26a...plate, 26b...frame, 26c...screw hole, 26e...washer, 27...upper blocking member, 27a...hole, 27b...flange , 28...handle, 30...adsorbent material storage section, 31a...screw, 31b...nut, 32...ventilation area, 33...non-ventilation area, 35...hinge, 36...grip, 37...guide member, 38...plate, 40...filter holding member, 40a...wall, 40b...edge portion, 41...filter insertion hole, 42...seal, 43...pressing member, 44...screw, 47...rising portion, 48...seal, 49...filter structure, 60...moving structure Part, 61...mounting structure part, 62...slide rail, 62a...outer rail, 62b...intermediate rail, 62c...inner rail, 63...moving member, 63a...guide part, 65...protruding wall, 66...contact surface, 70...lifting device, 71...bridge member, 72...support member, 73...screw shaft, 74...wedge, 75...guide member, 76...block, 77...contact member, 77a...downward extension part, 77b...rearward extension part

Claims

1. an intake port for drawing in air, an exhaust port for discharging air, and an air flow path between the intake port and the exhaust port; a filter structure capable of accommodating an adsorbent for adsorbing substances from the air and through which air can pass while the adsorbent is accommodated inside; a moving structure portion for moving the filter structure in a front-rear direction to insert it into and remove it from the flow path; a contact surface that is a surface that extends along an inner wall of the flow channel on a cross section of the flow channel above the moving structure portion; a lifting device that can move the filter structure inserted into the flow path in a vertical direction and closes a gap between the filter structure and the contact surface by lifting the filter structure; is established, The lifting device is a device in which a plurality of blocks that move up and down simultaneously are lined up in one direction, A plurality of the lifting devices are arranged in another direction different from the one direction, the filter structure is placed on the block and moves up and down at a plurality of locations in the one direction and a plurality of locations in the other direction; Air purifier.

2. an intake port for drawing in air, an exhaust port for discharging air, and an air flow path between the intake port and the exhaust port; a filter structure capable of accommodating an adsorbent for adsorbing substances from the air and through which air can pass while the adsorbent is accommodated inside; a moving structure portion for moving the filter structure in a front-rear direction to insert it into and remove it from the flow path; a contact surface that is a surface that extends along an inner wall of the flow channel on a cross section of the flow channel above the moving structure portion; a lifting device that can move the filter structure inserted into the flow path in a vertical direction and closes a gap between the filter structure and the contact surface by lifting the filter structure; is established, The moving structure portion includes left and right moving members that slide in the front-rear direction, the filter structure is mounted on the left and right moving members and moves in the front-rear direction together with the moving members, thereby being movable between the inside and the outside of the flow path, The lifting device includes a block that moves up and down, In the flow path, when the block rises and reaches a predetermined height, the filter structure is separated from the moving member and placed on the block, and when the block falls and reaches the predetermined height, the filter structure is placed on the moving member and separated from the block, The block rises above the predetermined height, and the gap between the filter structure and the contact surface is blocked. Air purifier.

3. the filter structure includes a filter holding member inserted into the flow path, and a filter inserted into a filter insertion hole formed in the filter holding member, When the filter structure is raised, a gap between the filter holding member and the contact surface is blocked.

3. The air purifier according to claim 1 or 2.

4. the filter comprises: a cylindrical adsorbent storage section in which the adsorbent is stored and through which air can pass in a radial direction; and a flange formed on the radially outer side of an upper end of the adsorbent storage section and extending around the adsorbent storage section in a circumferential direction; the adsorbent storage section is located below the filter holding member, and the flange is placed on the filter holding member, The gap between the lower surface of the flange and the upper surface of the filter holding member is sealed. The air purifier according to claim 3.

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