Filter module for painting equipment

Abstract

To provide a filter module for painting equipment with low pressure loss and high paint retention.SOLUTION: A filter module 30 comprises an outer case 31, an eliminator 40, and a diffusion structure 50. The outer case 31 has an inflow port 36 and an outflow port 37, and air containing paint particles enters the interior from the inflow port 36 and is discharged from the outflow port 37. The eliminator 40 is accommodated in the outer case 31 and comprises a plurality of zigzag-shaped tabular eliminator elements 43, 44 which are juxtaposed, and separates the paint particles from the air. The diffusion structure 50 is accommodated between the eliminator 40 and the inflow port 36 in the outer case 31, guides the air to a front end part of the eliminator 40, and changes a flow direction of the air introduced from the inflow port 36, thereby diffusing the air toward an outer peripheral side from a midship part of a flow channel connecting the inflow port 36 and the outflow port 37.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a filter module for a painting installation that separates paint particles from the air. [Background technology]

[0002] Various filter modules for separating paint particles from air have been proposed (see, for example, Patent Documents 1 to 3). For example, as shown in FIGS. 16 and 17, Patent Document 1 discloses a filter module 141 including an outer box 142 and an eliminator 143. The outer box 142 is rectangular and has an inlet 144 opening at the top and an outlet 145 opening at the side. The eliminator 143 is housed within the outer box 142 and includes a plurality of zigzag-shaped plate-like eliminator elements 146 arranged side by side. Air A2 containing paint particles (paint mist) flows into the outer box 142 through the inlet 144, turns approximately 90°, passes between adjacent eliminator elements 146, and is discharged from the outlet 145. The paint particles are separated from the air A2 as they pass between the eliminator elements 146. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6895011 [Patent Document 2] Patent No. 6475241 [Patent Document 3] Patent No. 6723677 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the case of the conventional filter module 141 described above, the air A2 flowing in from the inlet 144 changes direction suddenly (by about 90 degrees) inside the outer box 142, resulting in a problem of pressure loss. Furthermore, the air A2 flowing in from the inlet 144 flows through the center of the flow path connecting the inlet 144 and the outlet 145 and is guided to the eliminator 143. As a result, paint particles contained in the air A2 tend to be unevenly distributed and accumulate in the center of the flow path. Furthermore, because the cross-sectional area of ​​the flow path between the eliminator elements 146 is small, the flow path is easily clogged with paint particles, resulting in a problem of a small paint retention capacity.

[0005] The present invention has been made in view of the above problems, and an object of the present invention is to provide a filter module for painting equipment which has a small pressure loss and a large paint retention capacity. [Means for solving the problem]

[0006] In order to solve the above problem, the invention described in claim 1 is a filter module for painting equipment, characterized in that it is provided on an exhaust path of painting equipment and made of a combustible material, the filter module comprising: an outer box having an inlet opening on an upstream side and an outlet opening on a downstream side opposite the upstream side, wherein air containing paint particles flows into the filter module from the inlet and is discharged from the outlet; an eliminator housed in the outer box and consisting of a plurality of zigzag-shaped plate-shaped eliminator elements arranged side by side, which separates the paint particles from the air; and a diffusion structure housed in the outer box between the eliminator and the inlet, which guides the air to a front end of the eliminator and changes the flow direction of the air introduced from the inlet, thereby diffusing the air from the center of the flow path connecting the inlet and the outlet toward the outer periphery.

[0007] In the invention described in claim 1, the inlet and outlet are located opposite each other on the outer casing. This reduces pressure loss because air flowing in from the inlet is guided to the outlet without changing direction within the outer casing. Furthermore, a diffusion structure is housed between the eliminator and the inlet, so the air flowing in from the inlet is diffused from the center of the flow path connecting the inlet and outlet toward the outer periphery and guided to the eliminator. This allows the air containing paint particles to spread throughout the entire filter module and flow uniformly within the filter module. This prevents the flow paths between the eliminator elements from being clogged with paint particles, increasing the paint retention capacity.

[0008] Furthermore, in claim 1, the filter module is made of a combustible material, so the filter module can be incinerated or replaced as a disposable item. Examples of combustible materials include paper, resin, and wood. Note that using corrugated cardboard or corrugated plastic as the combustible material improves the strength of the filter module.

[0009] The invention described in claim 2 is characterized in that, in claim 1, the diffusion structure is configured to include a diffusion plate that is inclined with respect to the flow path and diffuses the air from the center of the flow path toward the outer periphery.

[0010] In the invention described in claim 2, air introduced into the outer box from the inlet collides with the diffuser plate, changing direction and leading to the downstream eliminator. As a result, the air flows uniformly without bias. In other words, the contact area of ​​air per unit flow rate increases. This makes it easier for paint particles contained in the air to adhere to the surface of the diffuser plate and also to the surface of the downstream eliminator element, improving the paint particle removal efficiency.

[0011] The invention described in claim 3 is characterized in that, in claim 2, the diffusion plate has a double structure consisting of one inner swash plate and one outer swash plate surrounding the inner swash plate.

[0012] In the invention described in claim 3, air introduced into the outer casing through the inlet collides with two swash plates (an inner swash plate and an outer swash plate) that constitute the diffusion structure, changing its direction and efficiently diffusing the air toward the outer periphery of the flow path. Moreover, because the diffusion structure is composed of only one inner swash plate and one outer swash plate, a sufficient gap can be secured between the inner swash plate and the outer swash plate. As a result, the flow path between the inner swash plate and the outer swash plate is less likely to be clogged with paint particles, thereby extending the life of the filter module.

[0013] The invention as set forth in claim 4 is characterized in that in claim 3, the inner circumferential side swash plate and the outer circumferential side swash plate are formed in a rectangular ring shape or a circular ring shape.

[0014] In the fourth aspect of the present invention, the inner swash plate and the outer swash plate are formed in an annular shape, so that the air introduced into the outer casing from the inlet collides with the inner swash plate and the outer swash plate, thereby diffusing evenly throughout the entire outer periphery of the flow passage. This allows the air to spread throughout the filter module, and paint particles contained in the air are uniformly attached to the surface of the downstream eliminator element, further improving the paint particle removal efficiency.

[0015] The invention described in claim 5 is characterized in that, in claim 3, the inner swash plate and the outer swash plate are connected and held together via a plurality of connecting plates extending radially from the center of the diffusion structure toward the outer periphery.

[0016] According to the fifth aspect of the present invention, the positioning of the inner swash plate and the outer swash plate can be easily and accurately achieved by using a plurality of connecting plates. The angles of the inner swash plate and the outer swash plate can be accurately maintained by the connecting plates. Furthermore, the inner swash plate and the outer swash plate are reinforced by the connecting plates, so that deformation of the inner swash plate and the outer swash plate is prevented even when the pressure (wind pressure) of the air introduced into the outer casing from the inlet is high.

[0017] The invention described in claim 6 is based on claim 5, and is characterized in that first notches are formed at multiple locations on the inner swash plate and the outer swash plate, second notches are formed on the connecting plate into which the first notches can be inserted, and the inner swash plate and the outer swash plate are connected and held together via the connecting plate with the contact portions between the first notches and the second notches remaining non-adhesive.

[0018] In the invention described in claim 6, the connection of the connecting plate to the inner swash plate and the connection of the connecting plate to the outer swash plate are performed without using adhesive, so that the folded flat diffusion structure can be assembled three-dimensionally.

[0019] The invention of claim 7 is based on claim 5, and is characterized in that the inner swash plate and the outer swash plate are formed of an upper inclined plate inclined upward on the outer periphery of the flow passage, a lower inclined plate inclined downward on the outer periphery of the flow passage, a left inclined plate inclined left on the outer periphery of the flow passage, and a right inclined plate inclined right on the outer periphery of the flow passage, and the upper inclined plate of the inner swash plate and the upper inclined plate of the outer periphery of the flow passage, as well as the lower inclined plate of the inner swash plate and the lower inclined plate of the outer periphery of the flow passage, are connected and held via first connecting plates, and the left inclined plate of the inner swash plate and the left inclined plate of the outer periphery of the flow passage, as well as the right inclined plate of the inner swash plate and the right inclined plate of the outer periphery of the flow passage are connected and held via second connecting plates, as the connecting plates, extending in a direction different from that of the first connecting plates.

[0020] The invention described in claim 8 is characterized in that, in claim 2, the diffusion plate has an upper inclined plate that is inclined upward on the outer periphery of the flow path, a lower inclined plate that is inclined downward on the outer periphery of the flow path, a left inclined plate that is inclined left on the outer periphery of the flow path, and a right inclined plate that is inclined right on the outer periphery of the flow path.

[0021] In the invention described in claim 8, the diffuser plate has an upper inclined plate, a lower inclined plate, a left inclined plate, and a right inclined plate, so that the air introduced into the outer box from the inlet collides with the diffuser plate and is diffused evenly upward, downward, left, and right in the flow path. This spreads the air throughout the filter module, and paint particles contained in the air adhere evenly to the surface of the downstream eliminator element, further improving the paint particle removal efficiency.

[0022] The invention described in claim 9 is characterized in that, in claim 8, the upper inclined plate and the lower inclined plate are connected and held via a first connecting plate, and the left inclined plate and the right inclined plate are connected and held via a second connecting plate extending in a different direction from the first connecting plate, and an upper / lower diffusion unit formed by the upper inclined plate, the lower inclined plate, and the first connecting plate and a left / right diffusion unit formed by the left inclined plate, the right inclined plate, and the second connecting plate are arranged adjacent to each other in the front-to-back direction of the flow path.

[0023] In the invention described in claim 9, the first connecting plate allows for easy and accurate positioning of the upper and lower inclined plates. Furthermore, the second connecting plate allows for easy and accurate positioning of the left and right inclined plates. Furthermore, because the diffuser plate has upper and lower diffusion units, air introduced into the outer box from the inlet collides with the upper and lower diffusion units, thereby evenly diffusing upward and downward in the flow path. Furthermore, because the diffuser plate has left and right diffusion units, air introduced into the outer box from the inlet collides with the left and right diffusion units, thereby evenly diffusing downward in the flow path. As a result, air spreads throughout the filter module and flows uniformly within the filter module, allowing paint particles contained in the air to adhere uniformly to the surface of the downstream eliminator element. This further improves paint particle removal efficiency.

[0024] The invention described in claim 10 is characterized in that, in claim 1, a plurality of linear plate portions extending in a direction from the inlet toward the outlet are arranged side by side at the front end of the eliminator element.

[0025] In the invention described in claim 10, by incorporating a linear plate portion extending in the direction from the inlet to the outlet at the front end of the eliminator, it is possible to straighten the air introduced into the outer box from the inlet. Also, because the edge of the linear plate portion receives the air, paint particles contained in the air are less likely to adhere to the linear plate portion, and therefore it is possible to prevent the flow path between adjacent linear plate portions from being clogged with paint particles.

[0026] The invention as set forth in claim 11 is characterized in that in claim 10, a recess is cut out and formed on the front end side of the linear plate portion.

[0027] In the invention described in claim 11, the air that has passed through the diffusion structure flows linearly through the flow path between the pair of linear plate portions, and also flows between adjacent linear plate portions via the recesses. As a result, the air spreads throughout the entire filter module, and paint particles contained in the air adhere uniformly to the surface of the downstream eliminator element, further improving the paint particle removal efficiency.

[0028] The invention described in claim 12 is characterized in that, in any one of claims 1 to 11, the eliminator is configured to include a first eliminator section consisting of a plurality of first eliminator elements arranged side by side in a zigzag shape, and a second eliminator section housed in a position closer to the outlet than the first eliminator section and consisting of a plurality of second eliminator elements arranged side by side in a zigzag shape, and the pitch between adjacent first eliminator elements is greater than the pitch between adjacent second eliminator elements.

[0029] In the invention described in claim 12, the pitch between adjacent second eliminator elements is smaller than the pitch between adjacent first eliminator elements, allowing paint particles to be classified. Specifically, the first eliminator element with the larger pitch allows paint particles with larger diameters to adhere and be collected, and then the second eliminator element with the smaller pitch allows paint particles with smaller diameters to adhere and be collected. As a result, the downstream flow path, where the pitch between adjacent eliminator elements is smaller, is less likely to be clogged by large paint particles, thereby extending the life of the filter module. [Effects of the Invention]

[0030] As described above in detail, according to the inventions set forth in claims 1 to 12, it is possible to provide a filter module for painting equipment which has a small pressure loss and a large paint retention capacity. [Brief explanation of the drawings]

[0031] [Figure 1] 1 is a schematic cross-sectional view showing a painting facility according to an embodiment of the present invention; [Figure 2] FIG. [Figure 3] FIG. [Figure 4] FIG. 2 is a front view showing the filter module as viewed from the upstream side. [Figure 5] FIG. 4 is a rear view showing the filter module as viewed from the downstream side. [Figure 6] FIG. [Figure 7] FIG. 2 is a perspective view showing an inner swash plate and an outer swash plate; [Figure 8] FIG. [Figure 9] FIG. [Figure 10] 10 is a graph showing the relationship between spray amount and pressure loss. [Figure 11] FIG. 10 is a plan view showing a connecting plate according to another embodiment. [Figure 12] FIG. 10 is a front view of a filter module as viewed from the upstream side in another embodiment. [Figure 13] FIG. 10 is a cross-sectional side view showing a filter module according to another embodiment. [Figure 14] FIG. 10 is a cross-sectional plan view showing a filter module according to another embodiment. [Figure 15] 10 is a perspective view showing an upper and lower diffusion unit and a left and right diffusion unit according to another embodiment. FIG. [Figure 16] FIG. 1 is a cross-sectional side view showing a filter module according to the prior art. [Figure 17] FIG. 1 is a cross-sectional plan view showing a filter module according to the prior art. DETAILED DESCRIPTION OF THE INVENTION

[0032] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

[0033] As shown in Fig. 1, the filter module 30 of this embodiment is provided on an exhaust path E1 of a coating system 10. The coating system 10 includes a coating booth 11 and a paint particle removal device 20. The coating booth 11 accommodates a conveyor rail 12 extending in a longitudinal direction (a direction perpendicular to the plane of the page in Fig. 1), a transport vehicle 13 that moves on the conveyor rail 12, and a plurality of coating robots 14 arranged on the sides of the conveyor rail 12. In the coating booth 11, atomized paint (paint particles) is sprayed from a paint gun 15 of the coating robot 14 onto a coating object W1 (an automobile body in this embodiment) in the coating booth 11, whereby the coating object W1 is painted while being transported along the longitudinal direction of the transport rail 12.

[0034] A ceiling wall 16 is provided above the painting booth 11. The ceiling wall 16 has a mesh structure, and compressed air A1 is supplied to the upper side. As a result, the air A1 passes through the ceiling wall 16 and flows downward within the painting booth 11, so that paint particles that have not adhered to the workpiece W1 are guided downward. Furthermore, the painting equipment 10 is provided with a connecting duct 17 that connects the painting booth 11 and the paint particle removal device 20.

[0035] 1, the paint particle removal device 20 is a device that removes paint particles contained in air A1 discharged from a paint booth 11. The paint particle removal device 20 has a filter housing 21 that can house one filter module 30, which is a primary filter, and multiple secondary filters 100. Specifically, the filter housing 21 has a lower housing section 22 and an upper housing section 23 that is disposed adjacent to and above the lower housing section 22. The filter module 30 can be housed in the lower housing section 22 so as to be freely movable in and out, and the secondary filters 100 can be housed in the upper housing section 23 so as to be freely movable in and out.

[0036] The entire filter module 30 is made of a combustible material (specifically, corrugated cardboard). As shown in FIGS. 2 to 6, the filter module 30 includes an outer box 31, an eliminator 40, and a diffusion structure 50. The outer box 31 is shaped like a rectangular parallelepiped having an upper surface 32 and a lower surface 33. The outer box 31 also has an upstream side surface 34 (the left side surface in FIG. 2) and a downstream side surface 35 (the right side surface in FIG. 2) opposite the upstream side surface 34. The outer box 31 also has a rectangular inlet 36 opening at the upstream side surface 34 and a rectangular outlet 37 opening at the downstream side surface 35. In the filter module 30 of this embodiment, air A1 containing paint particles flows into the interior through the inlet 36, flows linearly within the outer box 31, and is then discharged from the outlet 37. The air A1 discharged from the outlet 37 is then guided into the upper storage section 23.

[0037] As shown in Figures 2, 3, and 5, the eliminator 40 is housed in the outer box 31. The eliminator 40 includes a first eliminator section 41 and a second eliminator section 42 housed at a position closer to the outlet 37 than the first eliminator section 41. The first eliminator section 41 is made up of a plurality of plate-shaped first eliminator elements 43 arranged side by side and functions to separate paint particles from the air A1. The second eliminator section 42 is made up of a plurality of plate-shaped second eliminator elements 44 arranged side by side and functions to separate paint particles from the air A1. Each of the first eliminator elements 43 and each of the second eliminator elements 44 extends in the vertical Z direction (see Figure 2). Each of the first eliminator elements 43 and each of the second eliminator elements 44 also extends in the horizontal X direction (see Figure 2). More specifically, each of the first eliminator elements 43 and each of the second eliminator elements 44 has a zigzag shape in a plan view. Therefore, a serpentine path is formed between adjacent first eliminator elements 43 and between adjacent second eliminator elements 44. The pitch P1 between adjacent first eliminator elements 43 is larger than the pitch P2 between adjacent second eliminator elements 44, and specifically, is about twice the pitch P2.

[0038] As shown in FIGS. 2 and 3, a plurality of linear plate portions 45 extending in a direction from the inlet 36 toward the outlet 37 are arranged side by side at the front end (lower end in FIG. 3) of each first eliminator element 43. The pitch P3 between adjacent linear plate portions 45 is slightly larger than the pitch P1 between adjacent first eliminator elements 43. A recess 47 (see FIG. 2) opening at the front end 46 (left end in FIG. 2) of each linear plate portion 45 is cut out. The recess 47 has a rectangular shape that is elongated in the vertical direction (Z direction) of the linear plate portion 45. Note that the areas of the linear plate portion 45 where the recess 47 is not formed, in other words, the front ends 46 of the upper and lower ends of the linear plate portion 45, are in contact with the diffusion structure 50.

[0039] As shown in FIGS. 2 to 4 and 6, a diffusion structure 50 is housed within the outer casing 31 between the eliminator 40 and the inlet 36. The diffusion structure 50 guides air A1 to the front end of the first eliminator section 41. The diffusion structure 50 also changes the flow direction of the air A1 introduced through the inlet 36, diffusing the air A1 from a center C1 (see FIG. 4) of a linear flow path F1 (see FIG. 2) connecting the inlet 36 and the outlet 37 toward the outer periphery. The diffusion structure 50 also includes a diffusion plate 51 that diffuses the air A1 from the center C1 of the flow path F1 toward the outer periphery. The diffusion plate 51 has a double structure consisting of an inner swash plate 60 and an outer swash plate 70 surrounding the inner swash plate 60.

[0040] The inner swash plate 60 is formed in a rectangular ring shape by an upper inclined plate 61 inclined upward on the outer periphery side of the flow path F1, a lower inclined plate 62 inclined downward on the outer periphery side of the flow path F1, a left inclined plate 63 inclined left on the outer periphery side of the flow path F1, and a right inclined plate 64 inclined right on the outer periphery side of the flow path F1. Each of the inclined plates 61 to 64 is inclined at an angle of 30° to 60° (40° in this embodiment) with respect to the flow path F1. An inner diameter D1 of the inner swash plate 60 (specifically, the minimum value of the distance between the left inclined plate 63 and the right inclined plate 64) is larger than the pitch P3 between adjacent linear plate portions 45. Similarly, the outer circumferential side inclined plate 70 is formed in a rectangular ring shape by an upper inclined plate 71 inclined upward on the outer circumferential side of the flow path L1, a lower inclined plate 72 inclined downward on the outer circumferential side of the flow path L1, a left inclined plate 73 inclined left on the outer circumferential side of the flow path F1, and a right inclined plate 74 inclined right on the outer circumferential side of the flow path F1. Each of the inclined plates 71 to 74 is inclined by 30° to 60° (40° in this embodiment) with respect to the flow path F1. That is, the inclination angle of each of the inclined plates 71 to 74 (outer circumferential side inclined plate 70) is equal to the inclination angle of each of the inclined plates 61 to 64 (inner circumferential side inclined plate 60). In addition, the distance S1 between the inner swash plate 60 and the outer swash plate 70 (specifically, the distance between the left inclined plate 63 and the left inclined plate 73, and the distance between the right inclined plate 64 and the right inclined plate 74) is larger than the pitch P3 between adjacent linear plate portions 45.

[0041] 2 to 4 and 6, the inner swash plate 60 and the outer swash plate 70 are connected and held via eight connecting plates 80 extending radially from the center (center portion C1) of the diffusion structure 50 toward the outer periphery. Specifically, the upper inclined plates 61, 71 are connected and held via a first connecting plate 81 extending in the vertical direction, and the lower inclined plates 62, 72 are connected and held via a first connecting plate 82 also extending in the vertical direction. In addition, the left inclined plates 63, 73 are connected and held via a second connecting plate 83 extending in the left-right direction, which is different from the first connecting plates 81, 82, and the right inclined plates 64, 74 are connected and held via a second connecting plate 84 also extending in the left-right direction. Furthermore, the connection portion between the upper inclined plate 61 and the left inclined plate 63 and the connection portion between the upper inclined plate 71 and the left inclined plate 73 are connected and held via a third connecting plate 85, and the connection portion between the lower inclined plate 62 and the right inclined plate 64 and the connection portion between the lower inclined plate 72 and the right inclined plate 74 are also connected and held via a third connecting plate 86. The third connecting plates 85 and 86 extend in a diagonal direction (from the upper left to the lower right in FIG. 4 ), which is different from the direction in which the connecting plates 81 to 84 extend. Furthermore, the connection portion between the upper inclined plate 61 and the right inclined plate 64 and the connection portion between the upper inclined plate 71 and the right inclined plate 74 are connected and held via a fourth connecting plate 87, and the connection portion between the lower inclined plate 62 and the left inclined plate 63 and the connection portion between the lower inclined plate 72 and the left inclined plate 73 are also connected and held via a fourth connecting plate 88. The fourth connecting plates 87 and 88 extend in a diagonal direction (from the upper right to the lower left in FIG. 4) which is different from the directions of the connecting plates 81 to 86.

[0042] As shown in Fig. 7, first cutouts 65a to 65d are formed at eight locations on the inner peripheral swash plate 60. Specifically, the first cutouts 65a are formed at the center of the upper inclined plate 61 and the center of the lower inclined plate 62, and the first cutouts 65b are formed at the center of the left inclined plate 63 and the center of the right inclined plate 64. The first cutouts 65a have a slit shape extending in the width direction of the upper inclined plate 61 and the lower inclined plate 62, and the first cutouts 65b have a slit shape extending in the width direction of the left inclined plate 63 and the right inclined plate 64. Furthermore, the length of the first cutouts 65a is approximately half the width of the upper inclined plate 61 and the lower inclined plate 62, and the length of the first cutouts 65b is approximately half the width of the left inclined plate 63 and the right inclined plate 64. Furthermore, first cutouts 65c are formed at the connection portion between the upper inclined plate 61 and the left inclined plate 63 and at the connection portion between the lower inclined plate 62 and the right inclined plate 64, and first cutouts 65d are formed at the connection portion between the upper inclined plate 61 and the right inclined plate 64 and at the connection portion between the lower inclined plate 62 and the left inclined plate 63. The first cutouts 65c have a slit shape extending in the length direction of the connection portion between the upper inclined plate 61 and the left inclined plate 63 and the connection portion between the lower inclined plate 62 and the right inclined plate 64. The length of the first cutouts 65c is slightly shorter than half the length of the connection portion between the upper inclined plate 61 and the left inclined plate 63, and slightly shorter than half the length of the connection portion between the lower inclined plate 62 and the right inclined plate 64. The first cutout 65d has a slit shape that extends in the length direction of the connection portion between the upper inclined plate 61 and the right inclined plate 64 and in the length direction of the connection portion between the lower inclined plate 62 and the left inclined plate 63. The length of the first cutout 65d is slightly shorter than half the length of the connection portion between the upper inclined plate 61 and the right inclined plate 64, and is slightly shorter than half the length of the connection portion between the lower inclined plate 62 and the left inclined plate 63.

[0043] Similarly, first cutouts 75a to 75d are formed at eight locations on the outer peripheral swash plate 70. Specifically, first cutouts 75a are formed at the center of the upper inclined plate 71 and the center of the lower inclined plate 72, and first cutouts 75b are formed at the center of the left inclined plate 73 and the center of the right inclined plate 74. The first cutouts 75a have a slit shape extending in the width direction of the upper inclined plate 71 and the lower inclined plate 72, and the first cutouts 75b have a slit shape extending in the width direction of the left inclined plate 73 and the right inclined plate 74. Furthermore, the length of the first cutouts 75a is approximately half the width of the upper inclined plate 71 and the lower inclined plate 72, and the length of the first cutouts 75b is approximately half the width of the left inclined plate 73 and the right inclined plate 74. Furthermore, first cutouts 75c are formed at the connection portion between the upper inclined plate 71 and the left inclined plate 73 and at the connection portion between the lower inclined plate 72 and the right inclined plate 74, and first cutouts 75d are formed at the connection portion between the upper inclined plate 71 and the right inclined plate 74 and at the connection portion between the lower inclined plate 72 and the left inclined plate 73. The first cutouts 75c have a slit shape extending in the length direction of the connection portion between the upper inclined plate 71 and the left inclined plate 73 and the connection portion between the lower inclined plate 72 and the right inclined plate 74. The length of the first cutouts 75c is slightly shorter than half the length of the connection portion between the upper inclined plate 71 and the left inclined plate 73, and slightly shorter than half the length of the connection portion between the lower inclined plate 72 and the right inclined plate 74. The first cutout 75d has a slit shape that extends in the length direction of the connection portion between the upper inclined plate 71 and the right inclined plate 74 and in the length direction of the connection portion between the lower inclined plate 72 and the left inclined plate 73. The length of the first cutout 75d is slightly shorter than half the length of the connection portion between the upper inclined plate 71 and the right inclined plate 74, and slightly shorter than half the length of the connection portion between the lower inclined plate 72 and the left inclined plate 73.

[0044] 8 and 9, the connecting plate 80 is formed with second cutouts into which the first cutouts 65a-65d and 75a-75d can be inserted. Specifically, the first connecting plates 81 and 82 are formed with a second cutout 89a into which the first cutout 65a of the inner swash plate 60 can be inserted, and a second cutout 89b into which the first cutout 75a of the outer swash plate 70 can be inserted. The second cutouts 89a and 89b have a slit shape extending in a direction inclined with respect to the width direction of the first connecting plates 81 and 82. The length of the second cutouts 89a and 89b is slightly longer than half the width of the first connecting plates 81 and 82. The second connecting plates 83, 84 are each formed with a second cutout 90a into which the first cutout 65b of the inner swash plate 60 can be inserted, and a second cutout 90b into which the first cutout 75b of the outer swash plate 70 can be inserted. The second cutouts 90a, 90b are slit-shaped and extend in a direction inclined with respect to the width direction of the second connecting plates 83, 84. The length of the second cutouts 90a, 90b is slightly longer than half the width of the second connecting plates 83, 84. The third connecting plates 85, 86 are each formed with a second cutout (not shown) into which the first cutout 65c of the inner swash plate 60 can be inserted, and a second cutout (not shown) into which the first cutout 75c of the outer swash plate 70 can be inserted. The second cutouts are slit-shaped and extend in a direction inclined with respect to the width direction of the third connecting plates 85, 86. The length of the second cutouts is slightly longer than half the width of the third connecting plates 85, 86. The fourth connecting plates 87, 88 are each formed with a second cutout (not shown) into which the first cutout 65d of the inner swash plate 60 can be inserted, and a second cutout (not shown) into which the first cutout 75d of the outer swash plate 70 can be inserted. The second cutouts are slit-shaped and extend in a direction inclined with respect to the width direction of the fourth connecting plates 87, 88. The length of the second cutouts is slightly longer than half the width of the fourth connecting plates 87, 88.

[0045] The inner swash plate 60 and the outer swash plate 70 are connected and held via the connecting plate 80 while the contact portions between the first cutouts 65a and the second cutouts 89a and between the first cutouts 75a and the second cutouts 89b are not bonded to each other. Specifically, the inner swash plate 60 and the outer swash plate 70 are connected and held via the first connecting plates 81 and 82 while the contact portions between the first cutouts 65b and the second cutouts 90a and between the first cutouts 75b and the second cutouts 90b are not bonded to each other. Furthermore, the inner swash plate 60 and the outer swash plate 70 are connected and held via third connecting plates 85, 86 while the contact portions between the first cutouts 65c and the second cutouts (not shown) and the contact portions between the first cutouts 75c and the second cutouts (not shown) are not bonded. Furthermore, the inner swash plate 60 and the outer swash plate 70 are connected and held via fourth connecting plates 87, 88 while the contact portions between the first cutouts 65d and the second cutouts (not shown) and the contact portions between the first cutouts 75d and the second cutouts (not shown) are not bonded.

[0046] The outer box 31, the eliminator 40, and the diffusion structure 50 have a structure that allows them to be assembled three-dimensionally from a folded, flat state. In this embodiment, the components of the filter module 30 (the outer box 31, the eliminator 40, and the diffusion structure 50) are transported in a folded, flat state. The filter module 30 is completed by assembling the components in an unfolded state. The completed filter module 30 is placed in a standby position (not shown) outside the paint particle removal device 20. Thereafter, when the filter module 30 housed in the filter housing 21 becomes contaminated with paint particles, the filter module 30 is taken out of the filter housing 21 and incinerated as is without being folded. That is, the paint particles are discarded along with the filter module 30. The filter module 30 in the standby position is then housed in the filter housing 21 and used.

[0047] 1, the secondary filter 100 housed in the filter housing 21 is intended to remove paint particles contained in the air A1 by passing the air A1 discharged from the filter module 30. In the upper housing section 23, the pair of secondary filters 100 are arranged so that they approach each other upward.

[0048] The start end of an ascending duct 101 is connected to an outlet (not shown) of the filter housing 21. The ascending duct 101 has a rectangular cross section and extends upward from the outlet. An exhaust duct 102 is connected to the end of the ascending duct 101, and discharges air A1 that has been discharged from the outlet and passed through the ascending duct 101.

[0049] A blower (not shown) is used to create a negative pressure in the connecting duct 17, the filter housing 21, the ascending duct 101, and the exhaust duct 102. As a result, the air A1 in the painting booth 11 passes through the connecting duct 17 and then flows into the paint particle removal device 20. Paint particles contained in the air A1 are removed when the air passes through the paint particle removal device 20.

[0050] Next, a method for removing paint particles contained in the air A1 will be described.

[0051] First, when the painting robot 14 sprays paint from the paint gun 15 to paint the workpiece W1, oversprayed paint particles are guided into the connecting duct 17 together with air A1 in the painting booth 11. The air A1 passes through the connecting duct 17 and flows into the outer casing 31 through the inlet 36 of the filter module 30 housed in the lower housing portion 22 of the filter housing 21 (paint particle removal device 20). The air A1 is then guided by the diffusion structure 50 and flows into the inner region of the inner swash plate 60 and the region between the inner swash plate 60 and the outer swash plate 70. At this time, at least a portion of the air A1 comes into contact with the inner swash plate 60 and the outer swash plate 70, and is guided along the surfaces of the inner swash plate 60 and the outer swash plate 70. As a result, the air A1 is diffused from the center C1 of the flow path F1 connecting the inlet 36 and the outlet 37 toward the outer periphery (see FIG. 4), making the flow of the air A1 uniform. Also, some of the paint particles contained in the air A1 are removed by adhering to the surfaces of the inner periphery side swash plate 60 and the outer periphery side swash plate 70.

[0052] Furthermore, the air A1 that has passed through the diffusion structure 50 is guided to the first eliminator section 41 located downstream of the diffusion structure 50 and flows between adjacent linear plate sections 45. Each linear plate section 45 has a recess 47 cut out on the front end 46 side, allowing the air A1 to flow freely between the linear plate sections 45 via the recess 47. Some of the paint particles contained in the air A1 adhere to the surfaces of the linear plate sections 45 and are removed. The air A1 that has passed between adjacent linear plate sections 45 then flows between adjacent first eliminator elements 43. Each first eliminator element 43 has a zigzag shape in a plan view, forming a serpentine passage between adjacent first eliminator elements 43. As a result, the air A1 flows through the serpentine passage while colliding with the surfaces of the first eliminator elements 43, and some of the paint particles contained in the air A1 adhere to the surfaces of the first eliminator elements 43 and are removed.

[0053] Next, the air A1 that has passed through the first eliminator section 41 is guided to the second eliminator section 42 located downstream of the first eliminator section 41, and flows between adjacent second eliminator elements 44. Note that each second eliminator element 44 has a zigzag shape in a plan view, so that a serpentine passage is formed between adjacent second eliminator elements 44. As a result, the air A1 flows through the serpentine passage while colliding with the surfaces of the second eliminator elements 44, and some of the paint particles contained in the air A1 adhere to the surfaces of the second eliminator elements 44 and are removed.

[0054] Thereafter, the air A1 that has passed through the second eliminator section 42 is discharged from the outlet 37 to the outside of the outer box 31 and is led into the upper housing section 23. The air A1 then passes through the secondary filter 100 installed in the upper housing section 23. At this time, paint particles contained in the air A1 are removed by adhering to the secondary filter 100. At this point, the paint particles contained in the air A1 are almost completely removed.

[0055] Thereafter, the air A1 from which the paint particles have been removed is discharged from the upper housing portion 23 to the outside of the filter housing body 21. Then, the air A1 passes through the ascending duct 101 and is then discharged to the outside of the coating equipment 10 through the exhaust duct 102.

[0056] Next, the evaluation method and results of the filter module 30 will be described.

[0057] First, measurement samples were prepared as follows: A filter module in which the diffusion structure 50 was omitted from the filter module 30 of this embodiment was prepared, and this was designated case 1. Also, a filter module identical to the filter module 30 of this embodiment was prepared, and this was designated case 2.

[0058] Next, air containing paint particles was allowed to flow into the inlet of each measurement sample (case 1, 2) and then discharged to the outside through the outlet.The pressure loss was then measured for each processing volume (spray volume) of air that passed through the filter module.

[0059] As a result, as shown in Figure 10, in case 1, although the initial pressure loss was small, it was confirmed that the increase in pressure loss was large when the spray rate increased. In particular, it was confirmed that the pressure loss increased extremely when the spray rate reached its maximum. On the other hand, in case 2, although the initial pressure loss was higher than in case 1, it was confirmed that the increase in pressure loss when the spray rate increased was smaller than in case 1.

[0060] Therefore, when using a filter module to recover paint particles from the air, it has been confirmed that providing a diffusion structure 50 reduces the increase in pressure loss and reduces clogging, thereby increasing the amount of paint that can be retained.

[0061] Therefore, according to this embodiment, the following effects can be obtained.

[0062] (1) In the filter module 30 of this embodiment, the inlet 36 and the outlet 37 are provided at positions facing each other in the outer box 31. Therefore, the air A1 flowing in from the inlet 36 flows linearly to the outlet 37 without changing direction within the outer box 31, thereby reducing pressure loss.

[0063] Furthermore, because the diffusion structure 50 is housed between the eliminator 40 and the inlet 36, the air A1 flowing in from the inlet 36 is diffused from the center C1 of the flow path F1 connecting the inlet 36 and the outlet 37 toward the outer periphery and guided to the eliminator 40. This allows the air A1 containing paint particles to spread throughout the filter module 30 and flow uniformly within the filter module 30. As a result, the flow paths between the first eliminator elements 43 and the second eliminator elements 44 are prevented from being clogged with paint particles, increasing the paint retention capacity. This also allows for a more compact filter module 30, making it easier to secure storage space for the filter module 30 and improving the ease of handling the filter module 30. This also increases the flexibility in the placement of the filter module 30.

[0064] (2) In this embodiment, the air A1 introduced into the outer casing 31 through the inlet 36 collides with the two swash plates (the inner swash plate 60 and the outer swash plate 70) constituting the diffusion structure 50 and changes direction, thereby efficiently diffusing the air A1 toward the outer periphery of the flow path F1. Moreover, since the diffusion plate 51 constituting the diffusion structure 50 is composed of only one inner swash plate 60 and one outer periphery swash plate 70, a sufficient gap S1 between the inner swash plate 60 and the outer periphery swash plate 70 can be ensured. As a result, the flow path between the inner swash plate 60 and the outer periphery swash plate 70 is less likely to be clogged with paint particles, thereby extending the life of the filter module 30.

[0065] (3) In this embodiment, the upper inclined plates 61, 71 are connected and held via a first connecting plate 81, and the lower inclined plates 62, 72 are connected and held via a first connecting plate 82. At the same time, the left inclined plates 63, 73 are connected and held via a second connecting plate 83, and the right inclined plates 64, 74 are connected and held via a second connecting plate 84. Furthermore, the connection portion between the upper inclined plate 61 and the left inclined plate 63 and the connection portion between the upper inclined plate 71 and the left inclined plate 73 are connected and held via a third connecting plate 85, and the connection portion between the lower inclined plate 62 and the right inclined plate 64 and the connection portion between the lower inclined plate 72 and the right inclined plate 74 are connected and held via a third connecting plate 86. Furthermore, the connection portions between the upper inclined plate 61 and the right inclined plate 64 and the connection portions between the upper inclined plate 71 and the right inclined plate 74 are connected and held via a fourth connecting plate 87, and the connection portions between the lower inclined plate 62 and the left inclined plate 63 and the connection portions between the lower inclined plate 72 and the left inclined plate 73 are connected and held via a fourth connecting plate 88. As described above, the first connecting plate, the second connecting plate, the third connecting plate, and the fourth connecting plate are each divided into two connecting plates, so that the connecting plates 81 to 88 are not present in the inner region of the inner swash plate 60 (see FIGS. 4 and 6). Therefore, a sufficient space can be secured within the inner region of the inner swash plate 60, reducing the possibility that the inner region of the inner swash plate 60 will be clogged with paint particles.

[0066] (4) In this embodiment, the pitch P3 between adjacent linear plate portions 45 is smaller than the inner diameter D1 (the distance between the left inclined plate 63 and the right inclined plate 64) of the inner swash plate 60 and the distance S1 between the inner swash plate 60 and the outer swash plate 70. Furthermore, the pitch P1 between adjacent first eliminator elements 43 is smaller than the pitch P3, and the pitch P2 between adjacent second eliminator elements 44 is smaller than the pitch P1. This configuration enables paint particle classification. Specifically, larger paint particles are deposited and collected by the component with the larger pitch (distance), and then smaller paint particles are deposited and collected by the component with the smaller pitch. As a result, the downstream flow passage with the smaller pitch is less likely to be clogged with larger paint particles, thereby extending the life of the filter module 30.

[0067] (4) In this embodiment, the components of the filter module 30, namely, the outer box 31, the eliminator 40, and the diffusion structure 50, are configured to be three-dimensionally assembled from a folded, flat state. As a result, the components of the filter module 30 can be transported in a folded, compact state, reducing the burden of transportation. In addition, the components can be stored in a folded, compact state, making it easier to secure storage space.

[0068] The above embodiment may be modified as follows.

[0069] In the above embodiment, the inner swash plate 60 and the outer swash plate 70 are connected and supported by two first connecting plates 81, 82 extending vertically, two second connecting plates 83, 84 extending horizontally, two third connecting plates 85, 86 extending from the upper left to the lower right, and two fourth connecting plates 87, 88 extending from the upper right to the lower left. However, at least one of the first connecting plates 81, 82, the second connecting plates 83, 84, the third connecting plates 85, 86, and the fourth connecting plates 87, 88 may be replaced with a single connecting plate 111 as shown in FIG. 11 . In this case, the connecting plate 111 has a triangular second cutout 112 formed therein. This configuration makes it less likely for paint to accumulate in the second cutout 112. Furthermore, as in the above embodiment, if the first connecting plate, the second connecting plate, the third connecting plate and the fourth connecting plate are each divided into two connecting plates, slit-shaped second cutout portions 89a, 89b, 90a, 90b can be formed.

[0070] In the above embodiment, the inclination angle of each of the inclined plates 71 to 74 (outer peripheral inclined plate 70) is equal to the inclination angle of each of the inclined plates 61 to 64 (inner peripheral inclined plate 60). However, the inclination angle of each of the inclined plates 71 to 74 and the inclination angle of each of the inclined plates 61 to 64 may be different from each other.

[0071] In the above embodiment, the diffuser plate 51 has a double structure consisting of one inner swash plate 60 and one outer swash plate 70 surrounding the inner swash plate 60. However, the diffuser plate may have a multiple structure consisting of one inner swash plate 60 and two or more outer swash plates.

[0072] In the above embodiment, the inner swash plate 60 and the outer swash plate 70 are formed in a rectangular ring shape. However, as shown in FIG. 12, the inner swash plate 121 and the outer swash plate 122 may be formed in a circular ring shape.

[0073] 13 to 15, the diffusion structure 130 may be composed of an upper and lower diffusion unit 131 disposed closer to the inlet 36 and a left and right diffusion unit 132 disposed closer to the eliminator 40. The upper and lower diffusion unit 131 is composed of two upper inclined plates 133, two lower inclined plates 134, and a first connecting plate 135. The left and right diffusion unit 132 is composed of two left inclined plates 136, two right inclined plates 137, and a second connecting plate 138. The diffusion structure may be configured by disposing the left and right diffusion units 132 closer to the inlet 36 and disposing the upper and lower diffusion unit 131 closer to the eliminator 40. That is, the diffusion structure may be configured so that the upper and lower diffusion units 131 and the left and right diffusion units 132 are disposed adjacent to each other in the front-to-rear direction of the flow path F1.

[0074] In the above embodiment, a plurality of paint particle removal devices 20 may be installed along the longitudinal direction of the transport rail 12 (the transport direction of the workpiece W1). In this way, a large amount of air A1 can be treated.

[0075] In the filter housing 21 (paint particle removal device 20) of the above embodiment, the filter module 30 is housed in the lower housing portion 22, and the secondary filter 100 is housed in the upper housing portion 23. However, the secondary filter 100 may be housed in the lower housing portion 22, and the filter module 30 may be housed in the upper housing portion 23.

[0076] In the above embodiment, an automobile body is used as an example of the object W1 to be painted in the painting booth 11, but the present invention is not limited to this. For example, the object may be an automobile interior part such as an instrument panel, console box, or armrest, or an automobile exterior part such as a bumper or an aerodynamic part (spoiler, etc.). Furthermore, the object W1 does not necessarily have to be an automobile part.

[0077] Next, in addition to the technical ideas set forth in the claims, the technical ideas grasped by the above-described embodiments will be listed below.

[0078] (1) In claim 2, the filter module for painting equipment is characterized in that the diffusion plate has a multiple structure consisting of one inner swash plate and multiple outer swash plates surrounding the inner swash plate.

[0079] (2) In claim 7, the filter module for painting equipment is characterized in that the connection portion between the upper inclined plate and the left inclined plate on the inner circumferential side inclined plate, the connection portion between the upper inclined plate and the left inclined plate on the outer circumferential side inclined plate, the connection portion between the lower inclined plate and the right inclined plate on the inner circumferential side inclined plate, and the connection portion between the lower inclined plate and the right inclined plate on the outer circumferential side inclined plate are connected and held via a third connecting plate, which is the connecting portion extending in a direction different from that of the first connecting plate and the second connecting plate.

[0080] (3) In the technical idea (2), a filter module for a painting equipment is characterized in that the connection portion between the upper inclined plate and the right inclined plate on the inner peripheral inclined plate, the connection portion between the upper inclined plate and the right inclined plate on the outer peripheral inclined plate, the connection portion between the lower inclined plate and the left inclined plate on the inner peripheral inclined plate, and the connection portion between the lower inclined plate and the left inclined plate on the outer peripheral inclined plate are each connected and held via a fourth connecting plate, which is the connecting portion extending in a direction different from that of the first connecting plate, the second connecting plate, and the third connecting plate. [Explanation of symbols]

[0081] 10...Painting equipment 30...Filter module 31...Outer box 34...Upstream side 35…Downstream side 36…Inlet 37…Outlet 40...Eliminator 41...First Eliminator Section 42...Second Eliminator Section 43...First eliminator element as an eliminator element 44...Second eliminator element as an eliminator element 45...Straight plate part 46...front end 47...recess 50,130...Diffusion structure 51...Diffuser 60,121…Inner swash plate 61,71,133…Upward slope plate 62,72,134…Downward slope plate 63,73,136…Left inclined plate 64,74,137…Right tilt plate 65a, 65b, 65c, 65d, 75a, 75b, 75c, 75d...1st notch 70,122...Outer swash plate 80,111…Connection plate 81, 82, 135...First connecting plate 83, 84, 138...Second connecting plate 89a, 89b, 90a, 90b, 112…Second notch 131...Upper and lower diffusion unit 132...Left and right diffusion unit A1...Air C1: Center of the flow path E1...Exhaust route F1...flow path P1: Pitch between adjacent first eliminator elements P2: Pitch between adjacent second eliminator elements

Claims

1. A filter module made of a combustible material and installed on an exhaust path of a coating equipment, an outer box having an inlet opening on an upstream side surface and an outlet opening on a downstream side surface opposite to the upstream side surface, wherein air containing paint particles flows into the outer box through the inlet and is discharged from the outlet; an eliminator housed in the outer box and including a plurality of zigzag plate-shaped eliminator elements arranged side by side, for separating the paint particles from the air; a diffusion structure that is housed in the outer box between the eliminator and the inlet, and that guides the air to a front end of the eliminator and changes the flow direction of the air introduced from the inlet, thereby diffusing the air from a center of a flow path connecting the inlet and the outlet toward an outer periphery; A filter module for painting equipment, comprising:

2. The filter module for painting equipment according to claim 1, characterized in that the diffusion structure includes a diffusion plate that is inclined with respect to the flow path and diffuses the air from the center of the flow path toward the outer periphery.

3. 3. The filter module for painting equipment according to claim 2, wherein the diffusion plate has a double structure consisting of one inner swash plate and one outer swash plate surrounding the inner swash plate.

4. 4. The filter module for painting equipment according to claim 3, wherein the inner swash plate and the outer swash plate are formed in a rectangular ring shape or a circular ring shape.

5. 4. A filter module for painting equipment as described in claim 3, characterized in that the inner swash plate and the outer swash plate are connected and held together via a plurality of connecting plates extending radially from the center of the diffusion structure toward the outer periphery.

6. a plurality of first notches formed on the inner swash plate and the outer swash plate; and a plurality of second notches formed on the connecting plate into which the first notches are inserted; The inner swash plate and the outer swash plate are connected and held via the connecting plate while the contact portions of the first cutouts and the second cutouts are not bonded to each other.

6. A filter module for painting equipment according to claim 5.

7. the inner circumferential side swash plate and the outer circumferential side swash plate are formed by an upper inclined plate inclined upward on the outer circumferential side of the flow path, a lower inclined plate inclined downward on the outer circumferential side of the flow path, a left inclined plate inclined left on the outer circumferential side of the flow path, and a right inclined plate inclined right on the outer circumferential side of the flow path, the upper inclined plate of the inner swash plate, the upper inclined plate of the outer swash plate, and the lower inclined plate of the inner swash plate, the lower inclined plate of the outer swash plate are connected and held by a first connecting plate, which is the connecting plate; The left inclined plate of the inner swash plate, the left inclined plate of the outer swash plate, and the right inclined plate of the inner swash plate and the right inclined plate of the outer swash plate are connected and held via second connecting plates that extend in a direction different from that of the first connecting plates.

6. A filter module for painting equipment according to claim 5.

8. 3. The filter module for painting equipment according to claim 2, wherein the diffusion plate has an upper inclined plate inclined upward on the outer periphery of the flow path, a lower inclined plate inclined downward on the outer periphery of the flow path, a left inclined plate inclined left on the outer periphery of the flow path, and a right inclined plate inclined right on the outer periphery of the flow path.

9. The upper inclined plate and the lower inclined plate are connected and held via a first connecting plate, the left inclined plate and the right inclined plate are connected and held via a second connecting plate extending in a direction different from that of the first connecting plate, An upper-lower diffusion unit constituted by the upper inclined plate, the lower inclined plate, and the first connecting plate, and a left-right diffusion unit constituted by the left inclined plate, the right inclined plate, and the second connecting plate are disposed adjacent to each other in the front-rear direction of the flow path.

9. A filter module for a painting installation according to claim 8.

10. 2. The filter module for coating equipment according to claim 1, wherein a plurality of linear plate portions extending in a direction from the inlet toward the outlet are arranged side by side at a front end of the eliminator element.

11. 11. The filter module for painting equipment according to claim 10, wherein a recess is formed on the front end side of the linear plate portion.

12. the eliminator is configured to include a first eliminator section formed by arranging a plurality of first eliminator elements in a zigzag shape in parallel, and a second eliminator section housed at a position closer to the outlet than the first eliminator section and formed by arranging a plurality of second eliminator elements in a zigzag shape in parallel, The pitch between adjacent first eliminator elements is greater than the pitch between adjacent second eliminator elements.

12. A filter module for a painting installation according to any one of claims 1 to 11.

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