Paint mist removing apparatus

Abstract

To provide a coating material mist removing device capable of reusing a filter part to which a coating material adheres.SOLUTION: In a filter part 34 of a coating material mist removing device 10, air A1 flowing in from an inflow port part 60 flows out from an outflow port part 64 via a flow passage part 62 changing the flow of the air A1 at a plurality of places, so that coating material mist contained in the air A1 adheres to the inside of the flow passage part 62. In addition, since the filter portion 34 is made of metal, it is possible to prevent the filter portion 34 from being damaged when the paint adhering to the inside of the flow passage portion 62 is removed, as compared with a case where the filter portion 34 is made of corrugated cardboard or the like.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a paint mist removal device. [Background technology]

[0002] Patent Document 1 discloses a paint mist removal device, which has a filter section housed in a filter case, and is capable of collecting paint mist with this filter section. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2021-133269 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above prior art, the filter part is made of cardboard, and the filter part to which paint mist has adhered is incinerated and a new filter part is installed in the filter case, which is not desirable from the viewpoint of reusing the filter part.

[0005] In more detail, if the filter part is made of cardboard or the like, when removing paint that has adhered to the filter part, part of the filter part will peel off along with the paint, making it difficult to reuse the filter part.

[0006] The present disclosure has been made in consideration of the above points, and aims to provide a paint mist removal device that can reuse a filter portion to which paint has adhered. [Means for solving the problem]

[0007] A paint mist removal device according to one aspect of the present disclosure includes a filter unit made of metal or resin, and the filter unit has an inlet portion through which air containing paint mist flows, a flow path portion through which the air flowing in from the inlet portion changes the flow of the air at multiple locations, and an outlet portion through which the air flows out after passing through the flow path portion.

[0008] According to this aspect, a filter unit is provided, and air containing paint mist flows in through an inlet of this filter unit. The air that flows in through the inlet passes through a flow path that changes the air flow at multiple locations and flows out through an outlet. Therefore, in this aspect, paint mist contained in the air can be attached to the inside of the flow path, and air from which the paint mist has been removed can be discharged from the outlet.

[0009] Here, in this embodiment, the filter portion is made of metal or resin, and damage to the filter portion can be reduced when removing paint adhering to the flow path portion, compared to when the filter portion is made of cardboard or the like. [Effects of the Invention]

[0010] As described above, the paint mist removal device according to the present disclosure has the excellent effect of being able to reuse the filter portion to which paint has adhered. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a conceptual diagram showing a schematic configuration of a painting facility according to an embodiment of the present invention; [Figure 2] 1 is a cross-sectional view schematically showing the configuration inside a paint booth according to an embodiment of the present invention. [Figure 3] 1 is a partial cross-sectional view schematically showing the configuration of a paint mist removal device according to an embodiment of the present invention. [Figure 4] 4 is a plan cross-sectional view (a cross-sectional view corresponding to the cross section taken along line 4-4 in FIG. 3) that schematically shows the configuration of a filter unit that constitutes a part of the paint mist removing device according to the present embodiment. FIG. [Figure 5]FIG. 4 is a flow velocity distribution diagram when air containing paint mist flows inside the filter unit according to the present embodiment. [Figure 6] FIG. 2 is an exploded perspective view schematically illustrating the configuration of a filter unit according to the present embodiment. [Figure 7] FIG. 10 is a cross-sectional plan view schematically showing the arrangement of components that constitute a filter section according to a first modified example of the present embodiment. [Figure 8] FIG. 10 is a cross-sectional plan view schematically showing the configuration of a filter section according to a second modified example of the present embodiment. [Figure 9] FIG. 10 is a cross-sectional plan view schematically showing the configuration of a filter section according to a third modified example of the present embodiment. [Figure 10] FIG. 10 is a cross-sectional plan view schematically showing the configuration of a filter portion according to a fourth modified example of the present embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0012] A paint mist removal device 10 according to this embodiment and a coating facility 12 equipped with the same will be described below with reference to Figures 1 to 10. As shown in Figures 1 and 2, the coating facility 12 includes a coating booth 14, a heat pump type air conditioner 16, and multiple blowers (air blowers) 18.

[0013] The painting booth 14 has an upper storage section 14A in which workpieces W such as car bodies are stored, and a lower storage section 14B located below the upper storage section 14A and in which the paint mist removal device 10 and the like are stored.

[0014] In detail, the upper storage section 14A is provided with a conveying rail R, a conveying cart T that is capable of moving on the conveying rail R and supporting the workpiece W, and a painting robot P arranged on both sides of the conveying rail R in the width direction.

[0015] In the upper storage section 14A, atomized paint mist M is sprayed onto the workpiece W from a paint gun G attached to the tip of the arm of the painting robot P, thereby forming a coating film on the surface of the workpiece W.

[0016] On the other hand, the air conditioner 16 is equipped with a heating section 16A capable of generating hot air and a cooling section 16B capable of generating cold air, and the air conditioned by this air conditioner 16 is supplied into the upper storage section 14A from the ceiling side of the upper storage section 14A via a blower 18 arranged relative to the upper storage section 14A.

[0017] A ceiling wall 14A1 is disposed above the upper storage section 14A, and this ceiling wall 14A1 has a mesh structure. As a result, the air A1 compressed by the blower 18 passes through the ceiling wall 14A1 and flows downward into the upper storage section 14A, so that the paint mist M that does not adhere to the workpiece W is guided to the lower side of the upper storage section 14A.

[0018] The air A1 containing the paint mist M that has not adhered to the workpiece W passes through a grating (not shown) laid on the floor of the upper storage section 14A and enters the lower storage section 14B.

[0019] As described above, the air A1 that has entered the lower storage section 14B becomes air A2 from which paint mist M has been removed by the paint mist removal device 10, and is then discharged outside the painting booth 14 via the exhaust duct 19 connected to the paint mist removal device 10. The air A2 flows into the air conditioner 16 via the blower 18 disposed relative to the lower storage section 14B.

[0020] Next, we will explain the configuration of the paint mist removal device 10. As shown in Figure 3, the paint mist removal device 10 includes a case part 20 that forms its outer shell, a filter part 34 arranged inside the case part 20, a craft filter 24, and a bag filter 26.

[0021] The directions of arrows 1, 2, and 3 shown in each drawing indicate the respective directions of the paint mist removal device 10. More specifically, in this embodiment, as an example, the direction indicated by arrow 1 is defined as the height direction of the paint mist removal device 10. Furthermore, one of the directions indicated by arrows 1, 2, and 3 is orthogonal to the remaining two directions. In the following, unless otherwise specified, the direction indicated by arrow 1 will be referred to as the first direction, the direction indicated by arrow 2 will be referred to as the second direction, and the direction indicated by arrow 3 will be referred to as the third direction. In this embodiment, as an example, the description will be continued assuming that the first direction and the vertical direction coincide with each other.

[0022] The case portion 20 has an outer shape of a rectangular parallelepiped with the longitudinal direction as the first direction, and is configured to include an upper wall portion 20A that forms one side (upper side) in the first direction, a pair of side wall portions 20B that form one side and the other side in the second direction, and a front wall portion 20C that forms one side (front side) in the third direction.

[0023] Furthermore, a through-hole 30 is formed in a portion of the upper wall 20A on one side in the third direction by penetrating the upper wall 20A in the first direction. The other side in the third direction (rear side) of the case 20 is open. A plurality of casters 32 are attached to a portion of the case 20 on the other side in the first direction (lower side).

[0024] The filter unit 34 has an outer shape of a rectangular tube extending in the first direction, and is made by extruding a metal such as an aluminum alloy (see FIG. 5). As shown in FIG. 4, a plurality of filter units 34 (four, for example) are arranged inside the case unit 20 along the second direction.

[0025] As also shown in Figure 5, this filter section 34 is composed of an inlet section 60 that opens on one side in the third direction and through which air A1 flows in the third direction, a flow path section 62 through which the air A1 flowing in from the inlet section 60 flows and which changes the flow of the air A1 at multiple locations, and an outlet section 64 through which the air A1 that has passed through the flow path section 62 flows out on the other side in the third direction.

[0026] More specifically, the filter section 34 is composed of a pair of wall sections 34D, 34E and 34F that form its outer circumferential side, and wall section 34G, extending wall section 34H, wall section 34I, wall section 34J, extending wall section 34K, wall section 34L, wall section 34M, extending wall section 34N, wall section 34O, extending wall section 34P, wall section 34Q, extending wall section 34R, wall section 34S and extending wall section 34T that form its inner circumferential side.

[0027] The wall portion 34D is disposed on one side in the second direction (one side in the width direction) and the other side in the second direction (the other side in the width direction) of the filter portion 34, and extends in the third direction with the plate thickness direction as the second direction. The wall portion 34D on the one side in the second direction is located on one side in the second direction of the inlet portion 60, and the wall portion 34D on the other side in the second direction is located on the other side in the second direction of the outlet portion 64.

[0028] The wall portion 34E extends from the other side in the second direction of the inlet portion 60 with the plate thickness direction being the third direction, and reaches the wall portion 34D on the other side in the second direction.

[0029] The wall portion 34F extends from the peripheral edge portion on the other side in the third direction of the wall portion 34D on one side in the second direction toward the other side in the second direction, with the plate thickness direction being the third direction.

[0030] The wall portion 34G extends from the other side of the second direction of the inlet portion 60 to the other side of the third direction, with the plate thickness direction being the second direction, and the extending wall portion 34H extends from the peripheral portion of the other side of the third direction of the wall portion 34G to one side of the second direction and to the other side of the third direction.

[0031] The wall portion 34I extends toward the other side in the second direction from a location on the wall portion 34D on one side in the second direction that is approximately 40% of the total length of the wall portion 34D away from the end portion on one side in the third direction of the wall portion 34D. The wall portion 34J, whose thickness direction is the second direction, extends toward the one side in the third direction from the peripheral edge portion of the wall portion 34I on the other side in the second direction, and the extending wall portion 34K extends toward the one side in the second direction and the one side in the third direction from the peripheral edge portion of the wall portion 34J on one side in the third direction.

[0032] Wall portion 34L is located on the other side in the third direction of wall portion 34I, and extends from wall portion D on the other side in the second direction to one side in the second direction, with the plate thickness direction being the third direction. Wall portion 34M, with the plate thickness direction being the second direction, extends from the peripheral edge portion of wall portion 34L on one side in the second direction to the other side in the third direction, and extending wall portion 34N extends from the peripheral edge portion of wall portion 34M on the other side in the third direction to one side in the second direction and the other side in the third direction.

[0033] Wall portion 34O is located on the other side of wall portion 34M in the second direction and extends from wall portion 34F to one side in the third direction, with the plate thickness direction being the second direction, and extending wall portion 34P extends from the peripheral portion of wall portion 34O on one side in the third direction to one side in the second direction and one side in the third direction.

[0034] Wall portion 34Q is located on the other side of wall portion 34O in the second direction and extends from wall portion 34L to the other side of the third direction, with the plate thickness direction being the second direction, and extending wall portion 34R extends from the peripheral portion of wall portion 34Q on the other side of the third direction to one side in the second direction and the other side in the third direction.

[0035] The wall portion 34S extends from one side in the second direction of the outlet portion 64 to one side in the third direction, with the plate thickness direction being the second direction, and is located between the wall portion 34Q and the wall portion 34D on the other side in the second direction in the second direction. An extending wall portion 34T extends from the peripheral edge portion of the wall portion 34S on one side in the third direction to one side in the second direction and one side in the third direction.

[0036] In the following, the portion of the flow path section 62 on the inlet section 60 side, i.e., the upstream portion of the flow path section 62, which is composed of the portion of the wall section 34D on one side and the other side in the second direction on one side in the third direction, wall section 34E, wall section 34G, extending wall section 34H, wall section 34I, wall section 34J and extending wall section 34K, will be referred to as the inlet side flow path section 62A.

[0037] In addition, in the following, the portion on the other side of the third direction of the wall portion 34D on one side and the other side in the second direction, wall portion 34F, wall portion 34L, wall portion 34M, extending wall portion 34N, wall portion 34O, extending wall portion 34P, wall portion 34Q, extending wall portion 34R, wall portion 34S and extending wall portion 34T, that is, the portion on the outlet portion 64 side of the flow path portion 62 downstream side will be referred to as the outlet side flow path portion 62B.

[0038] Furthermore, in the following, in the second direction, the outlet on the other side of the inlet side flow path section 62A in the second direction and the inlet on one side of the outlet side flow path section 62B in the second direction are connected by a connecting flow path section 62C that includes wall section 34I and wall section 34L and extends in the second direction.

[0039] In the flow path 62 configured as described above, the walls 34E, 34F, 34I, and 34L function as first direction-changing walls that change the flow direction of the air A1 upon receiving the flow of the air A1. The walls 34D, 34J, 34O, 34Q, and 34S on the other side in the second direction function as second direction-changing walls that change the flow direction of the air A1 upon receiving the flow of the air A1 along the walls that function as the first direction-changing walls.

[0040] In other words, in the flow path section 62, more specifically, in the inlet side flow path section 62A and the outlet side flow path section 62B, pairs of wall sections functioning as first direction-changing wall sections and second direction-changing wall sections are arranged in series in the flow path of air A1.

[0041] Furthermore, in the flow path section 62, walls functioning as second direction-changing walls are arranged at points where the flow path section 62 bends, i.e., points where the flow of air A1 changes within the flow path section 62. On the opposite side of each of these walls to the wall functioning as the first direction-changing wall, extending wall section 34K, extending wall section 34P, extending wall section 34R, and extending wall section 34T extending toward the center line of the flow path section 62 are provided.

[0042] In the flow path section 62, the average value of the cross-sectional area of ​​the outflow side flow path section 62B when viewed from the direction in which the air A1 flows is smaller than the average value of the cross-sectional area of ​​the inflow side flow path section 62A.

[0043] In addition, as shown in FIG. 6, the flow path portion 62 is provided so as to penetrate the filter portion 34 in the first direction.

[0044] As shown in FIG. 6, the multiple filter sections 34 configured as described above are connected on one side in the first direction and on the other side in the first direction by a frame section 42 made of angle iron.

[0045] In addition, one side of the filter section 34 in the first direction is blocked by an upper lid section 44 serving as a lid section that is slidable in the third direction relative to the filter section 34, and the other side of the filter section 34 in the first direction is blocked by a lower lid section 46 serving as a lid section that is slidable in the third direction relative to the filter section 34.

[0046] Furthermore, sheet materials 48 made of paper or the like are interposed between the filter portion 34 and the upper lid portion 44, and between the filter portion 34 and the lower lid portion 46, respectively.

[0047] As shown in Figure 3, the craft filter 24 and the bag filter 26 are arranged in this order downstream of the filter section 34 in the flow path of the air A1, making it possible to collect paint mist M that cannot be completely removed by the craft filter 24.

[0048] (Actions and Effects of This Embodiment) Next, the operation and effects of this embodiment will be described.

[0049] 3 and 4, the paint mist removal device 10 according to this embodiment is provided with a filter section 34, and air A1 containing paint mist M flows in through an inlet section 60 of this filter section 34. Then, as shown in Fig. 5, the air A1 that flows in through the inlet section 60 flows through a flow path section 62 that changes the flow of the air A1 at multiple locations, and then flows out from an outlet section 64. Therefore, in this embodiment, the paint mist M contained in the air A1 can be caused to adhere to the inside of the flow path section 62, and the air A1 can be released from the outlet section 64 with the paint mist M removed.

[0050] More specifically, the paint mist M having relatively large particles adheres to each wall portion constituting the inlet-side flow path section 62A, and the paint mist M having relatively small particles adheres to each wall portion constituting the outlet-side flow path section 62B.

[0051] In a comparative example, when a filter part is made of cardboard or the like, when an attempt is made to remove paint adhering to the filter part, a part of the filter part peels off together with the paint, making it difficult to reuse the filter part. Specifically, when the filter part is made of cardboard or the like, the filter part with the paint adhering thereto is discarded and incinerated.

[0052] Here, in this embodiment, the filter portion 34 is made of metal, and unlike the above-mentioned comparative example, damage to the filter portion 34 can be suppressed when removing paint adhering to the inside of the flow path portion 62, compared to when the filter portion 34 is made of cardboard or the like.

[0053] In addition, in this embodiment, the flow path section 62 has multiple pairs of first direction-changing wall sections that change the flow direction of the air A1 upon receiving the flow of air A1, and second direction-changing wall sections that extend from the first direction-changing wall sections and change the flow direction of the air A1 upon receiving the flow of air A1 along the first direction-changing wall sections.

[0054] For example, in the flow path section 62, a set of the wall section 34I and the wall section 34J and a set of the wall section 34E and the wall section 34D are arranged in series.

[0055] For this reason, in this embodiment, the flow of air A1 is swirled and accelerated near the portion of wall portion 34J opposite to wall portion 34I, and paint mist M is centrifuged from the air A1 to adhere to the inside of flow path portion 62. Specifically, the centrifuged paint mist M adheres to the portion of wall portion 34J opposite to wall portion 34I and to extended wall portion 34K.

[0056] However, if the air A1 accelerated as described above collides with the wall portion 34D as it is, resistance to the flow of the air A1 increases, and it is thought that the pressure loss when the air A1 passes through the flow path portion 62 increases.

[0057] In this embodiment, for example, an extending wall portion 34K is provided on one side of the wall portion 34J in the third direction, extending toward the center line of the flow path portion 62. Therefore, although the flow of the air A1 is decelerated by the resistance of the extending wall portion 34K, the velocity vector of the air A1 toward the wall portion 34D can be reduced, thereby reducing the resistance caused by the air A1 colliding with the wall portion 34D. As a result, in this embodiment, it is possible to prevent an increase in pressure loss when the air A1 passes through the flow path portion 62.

[0058] In addition, in this embodiment, in the flow path section 62, the cross-sectional area of ​​the outlet side flow path section 62B on the outlet section 64 side when viewed from the direction in which air A1 flows is smaller than the cross-sectional area of ​​the inlet side flow path section 62A on the inlet section 60 side.

[0059] Therefore, in this embodiment, when the flow rate of air A1 is the same on the inlet side flow path section 62A side and the outlet side flow path section 62B side, the flow velocity of air A1 flowing through the outlet side flow path section 62B is faster than the flow velocity of air A1 flowing through the inlet side flow path section 62A.

[0060] Therefore, the angular velocity of the air A1 swirling by the above-mentioned first and second deflection wall sections is larger on the outlet side flow path section 62B side than on the inlet side flow path section 62A side, making it possible to centrifuge the paint mist M, which has relatively fine particles, from the air A1.

[0061] In FIG. 5, the flow velocity of the air A1 flowing through the flow path portion 62 is indicated by the shade of black, and the greater the flow velocity, the darker the black.

[0062] In this embodiment, the streamline direction of the air A1 flowing into the inlet portion 60 and the streamline direction of the air A1 flowing out from the outlet portion 64 are set to a third direction. That is, the streamline direction of the air A1 flowing into the inlet portion 60 and the streamline direction of the air A1 flowing out from the outlet portion 64 are substantially the same direction. Note that the term "substantially the same direction" as used here does not only mean that these directions are parallel, but also means that the angle between these directions is within a range of approximately 0 to 10 degrees.

[0063] The inlet port 62A and the outlet port 62B are arranged in parallel in the third direction, and are disposed such that the inlet port 60 is on one side in the second direction and the outlet port 64 is on the other side in the second direction. The outlet of the inlet port 62A on the other side in the second direction and the inlet of the outlet port 62B on one side in the second direction are connected by a connecting port 62C extending in the second direction.

[0064] Therefore, in this embodiment, it is possible to ensure the flow path length of the flow path portion 62 while suppressing an increase in size of the filter portion 34, particularly an increase in size in the second direction.

[0065] 6, the flow path 62 is provided to penetrate the filter unit 34 in a predetermined penetration direction, i.e., the first direction. Therefore, for example, with the upper lid unit 44 and the lower lid unit 46 slidably moved, a tool such as an ultrasonic scraper S can be applied to the wall unit 34I and moved linearly in the first direction to remove the paint adhering to the wall unit 34I together with a portion of the sheet material 48.

[0066] Furthermore, in this embodiment, the penetration direction of the flow path portion 62 is set vertically, and when paint is removed from the flow path portion 62 with a tool, the paint can fall vertically downward due to its own weight.

[0067] Additionally, in this embodiment, the sheet material 48 is interposed between the filter portion 34 and the upper lid portion 44 and between the filter portion 34 and the lower lid portion 46. This makes it possible to prevent the filter portion 34 and the upper lid portion 44 or the filter portion 34 and the lower lid portion 46 from adhering to each other due to paint leaking from the flow path portion 62.

[0068] As described above, the paint mist removal device 10 according to this embodiment can reuse the filter portion 34 to which paint has adhered.

[0069] <First Modification of the Above Embodiment> A first modified example of the above-described embodiment will be described below with reference to Fig. 7. This modified example has a configuration basically similar to that of the above-described embodiment, but multiple (two) filter sections 34 connected in the second direction are integrated, and the main part of the assembly of these filter sections 34 is made up of three steel parts, namely, a first component part 36, a second component part 38, and a third component part 40.

[0070] Specifically, the first component 36 includes walls 34D, 34F, 34I, 34J, 34O and 34S on one side in the second direction of the filter section 34 on one side in the second direction.

[0071] The second component 38 includes a wall portion 34D located at the boundary between the filter portion 34 on one side in the second direction and the filter portion 34 on the other side in the second direction, wall portions 34E, 34G, 34L, 34M and 34Q in the filter portion 34 on one side in the second direction, and wall portions 34F, 34I, 34J, 34O and 34S in the filter portion 34 on the other side in the second direction.

[0072] The third component 40 includes a wall 34D, a wall 34E, a wall 34G, a wall 34L, a wall 34M, and a wall 34Q on the other side in the second direction of the filter section 34 on the other side in the second direction. Note that the wall 34D located on the boundary between adjacent filter sections 34 is a part shared by these filter sections 34.

[0073] The first component 36, the second component 38, and the third component 40 configured as described above are configured such that the relative movement between these components is restricted by a frame portion 42 made of angle iron on one side in the first direction and on the other side in the first direction.

[0074] Although this modified example does not include the extending wall portions, it may include the extending wall portions.

[0075] Furthermore, the filter unit 34 according to this modification may be made of an extruded material, or may be made of an angle bar. When the filter unit 34 is made of an angle bar, it becomes possible to form a plurality of filter units 34 by combining pressed steel plates or the like, and management of the materials that form the filter units 34 becomes easier than when the filter unit 34 is made of an extruded material.

[0076] <Second Modification of the Above Embodiment> A second modification of the above-described embodiment will be described below with reference to Fig. 8. In this modification, the filter section 34 is configured to include an inlet section 60, a flow path section 62, and an outlet section 64, and is basically configured similarly to the above-described embodiment. However, it differs from the above-described embodiment in that a chamber section 50 is provided for the flow path section 62.

[0077] More specifically, in this modification, the chamber 50 is located on the downstream side of the flow path 62 at a point where the flow direction of the air A1 changes, on the upstream side of the entire flow path 62. The chamber 50 is configured to include some of the multiple walls that make up the filter unit 34, and is in communication with the flow path 62 via an opening 50A, which is the only communication path with the flow path 62.

[0078] With this configuration, when the air A1 flowing through the flow path 62 changes direction near the entrance of the chamber 50, the paint mist M, which has relatively large particles, is centrifuged from the flow path 62 and blown into the chamber 50. That is, the paint mist M adheres to and accumulates on the walls that make up the chamber 50 inside the chamber 50. Therefore, this modified example can contribute to the recovery of the paint mist M, which has relatively large particles.

[0079] <Third Modification of the Above Embodiment> A third modified example of the above-described embodiment will be described below with reference to Fig. 9. In this modified example, the filter section 34 includes an inlet section 60, a flow path section 62, and an outlet section 64, and is basically configured similarly to the above-described embodiment. However, it differs from the above-described embodiment in that a chamber section 52 is provided for the flow path section 62.

[0080] More specifically, in this modification, the chamber 52 is located downstream of the entire flow path 62 at a point where the flow direction of the air A1 changes. The chamber 52 is configured to include some of the multiple walls that make up the filter unit 34, and is in communication with the flow path 62 via an opening 52A, which is the only communication path with the flow path 62.

[0081] With this configuration, when the air A1 flowing through the flow path 62 changes direction near the entrance of the chamber 52, the paint mist M, which is made up of relatively small particles, is centrifuged from the flow path 62 and blown into the chamber 52. That is, the paint mist M adheres to and accumulates on the walls that make up the chamber 52 inside the chamber 52. Therefore, this modification can contribute to the recovery of the paint mist M, which is made up of relatively small particles.

[0082] <Fourth Modification of the Above Embodiment> A fourth modified example of the above-described embodiment will be described below with reference to Fig. 9. In this modified example, the filter section 34 is configured to include an inlet section 60, a flow path section 62, and an outlet section 64, and is basically configured similarly to the above-described embodiment. However, it differs from the above-described embodiment in that the chamber section 50 described in the second modified example and the chamber section 52 described in the third modified example are provided for the flow path section 62.

[0083] Such a configuration can contribute to the collection of paint mist M having relatively large particles as well as paint mist M having relatively small particles.

[0084] <Supplementary explanation of the above embodiment> (1) In the above-described embodiment, the filter unit 34 is mainly made of metal, but the material of the filter unit 34 is not limited to this. For example, the filter unit 34 may be made of resin, thereby integrating multiple filter units 34 into one unit.

[0085] (2) In addition, in the above-described embodiment, the filter section 34 is arranged so that the first direction is vertical. However, depending on the specifications of the paint mist removal device 10, the first direction of the filter section 34 may be set horizontally.

[0086] (3) In addition, in the above-described embodiment, each wall portion constituting the flow path portion 62 of the filter portion 34 is configured to extend linearly, but these wall portions may be configured to be curved depending on the specifications of the paint mist removal device 10, etc.

[0087] The following additional notes are provided regarding the above-described embodiments.

[0088] (Appendix 1) A filter portion made of metal or resin is provided. The filter unit includes: an inlet portion through which air containing paint mist flows in; a flow path portion that changes the flow of the air flowing in from the inlet portion at a plurality of locations; an outlet portion through which the air that has passed through the flow path portion flows out, Paint mist removal device. (Appendix 2) The flow path section includes a first direction-changing wall section that receives the air flow and changes the direction of the air flow, and a second direction-changing wall section that extends from the first direction-changing wall section and receives the air flow along the first direction-changing wall section and changes the direction of the air flow, and the plurality of sets of these are arranged in a row along the air flow. 10. A paint mist removal device as described in Appendix 1. (Appendix 3) The second direction-changing wall portion is disposed at a point where the flow path portion bends, An extending wall portion extending toward the center line of the flow path portion is provided on the opposite side of the first direction-changing wall portion in the second direction-changing wall portion. 1. A paint mist removal device as described in Appendix 2. (Appendix 4) The flow path portion is an inlet-side flow path portion provided on the inlet-side side; an outlet-side flow passage portion provided on the outlet side and having a cross-sectional area, as viewed from the air flow direction, smaller than the cross-sectional area of ​​an inlet-side flow passage portion on the inlet side; Equipped with 4. A paint mist removal device according to claim 2 or 3. (Appendix 5) The inlet-side flow path section and the outlet-side flow path section are each configured to include a plurality of the sets arranged in series along the flow of the air. 10. A paint mist removal device as described in appendix 4. (Appendix 6) the flow path portion further includes a connecting flow path portion that connects the inlet-side flow path portion and the outlet-side flow path portion, The flow direction of the air flowing into the inlet portion and the flow direction of the air flowing out of the outlet portion are set to be substantially the same direction, and the inlet-side flow path portion, the connection flow path portion, and the outlet-side flow path portion are arranged in parallel in the streamline direction, and are arranged such that, in an orthogonal direction perpendicular to the streamline direction, the inlet portion is on one side of the orthogonal direction and the outlet portion is on the other side of the orthogonal direction, an outlet on the other side of the inlet-side flow path portion in the orthogonal direction and an inlet on the one side of the outlet-side flow path portion in the orthogonal direction are connected by the connecting flow path portion extending in the orthogonal direction; 10. A paint mist removal device as described in appendix 5. (Appendix 7) The flow path portion is provided to penetrate the filter portion in a predetermined penetration direction, The flow path portion is closed at one side in the through-passage direction and at the other side in the through-passage direction by a lid portion. A paint mist removal device according to any one of appendices 1 to 6. (Appendix 8) The penetration direction is set to the vertical direction. 8. A paint mist removal device as described in Appendix 7. (Appendix 9) A sheet material is interposed between the filter portion and the lid portion. 10. A paint mist removal device according to claim 7 or 8. (Appendix 10) The filter section is provided with a chamber section that is located downstream of the flow path section at a point where the air flow direction of the flow path section changes and that is in communication with the flow path section. A paint mist removal device according to any one of Supplementary notes 1 to 9. [Explanation of symbols]

[0089] 10 Paint mist removal device 34 Filter section 60 Inlet section 62 Flow path section 62A Inlet flow path section 62B Outlet flow path section 62C Connection flow path 64 Outlet section 34D wall section (second deflection wall section) 34E Wall (1st deflection wall) 34F Wall (1st direction wall) 34I Wall (First Transformation Wall) 34J Wall section (2nd directional wall section) 34K Extended Wall Section 34L Wall (First Reversal Wall) 34O Wall section (2nd directional wall section) 34P Extended wall portion 34Q Wall (Second Reversed Wall) 34R Extended wall portion 34S wall (second directional wall) 34T Extended wall section 44. Upper cover (cover) 46. ​​Lower cover (cover) 48 シートmaterial 50th Department 52nd Department

Claims

1. A filter portion made of metal or resin is provided. The filter unit includes: an inlet portion through which air containing paint mist flows in; a flow path portion that changes the flow of the air flowing in from the inlet portion at a plurality of locations; an outlet portion through which the air that has passed through the flow path portion flows out, Paint mist removal device.

2. The flow path section includes a first direction-changing wall section that receives the air flow and changes the direction of the air flow, and a second direction-changing wall section that extends from the first direction-changing wall section and receives the air flow along the first direction-changing wall section and changes the direction of the air flow, and the plurality of sets of these are arranged in a row along the air flow. The paint mist removal device according to claim 1.

3. The second direction-changing wall portion is disposed at a point where the flow path portion bends, An extending wall portion extending toward the center line of the flow path portion is provided on the opposite side of the first direction-changing wall portion in the second direction-changing wall portion. The paint mist removal device according to claim 2.

4. The flow path portion is an inlet-side flow path portion provided on the inlet-side side; an outlet-side flow passage portion provided on the outlet side and having a cross-sectional area, as viewed from the air flow direction, smaller than the cross-sectional area of ​​an inlet-side flow passage portion on the inlet side; Equipped with 4. The paint mist removal device according to claim 2 or 3.

5. The inlet-side flow path section and the outlet-side flow path section are each configured to include a plurality of the sets arranged in series along the flow of the air.

5. The paint mist removal device according to claim 4.

6. the flow path portion further includes a connecting flow path portion that connects the inlet-side flow path portion and the outlet-side flow path portion, The flow direction of the air flowing into the inlet portion and the flow direction of the air flowing out of the outlet portion are set to be substantially the same direction, and the inlet-side flow path portion, the connection flow path portion, and the outlet-side flow path portion are arranged in parallel in the streamline direction, and are arranged such that, in an orthogonal direction perpendicular to the streamline direction, the inlet portion is on one side of the orthogonal direction and the outlet portion is on the other side of the orthogonal direction, an outlet on the other side of the inlet-side flow path portion in the orthogonal direction and an inlet on the one side of the outlet-side flow path portion in the orthogonal direction are connected by the connecting flow path portion extending in the orthogonal direction; 6. The paint mist removal device according to claim 5.

7. The flow path portion is provided to penetrate the filter portion in a predetermined penetration direction, The flow path portion is closed at one side in the through-passage direction and at the other side in the through-passage direction by a lid portion. The paint mist removal device according to claim 1.

8. The penetration direction is set to the vertical direction. The paint mist removal device according to claim 7.

9. A sheet material is interposed between the filter portion and the lid portion. The paint mist removal device according to claim 7.

10. The filter section is provided with a chamber section that is located downstream of the flow path section at a point where the air flow direction of the flow path section changes and that is in communication with the flow path section. The paint mist removal device according to claim 1.

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