Paint mist collection device
The device addresses high pressure loss in paint mist collection by using a staggered arrangement of columnar baffle plates and a honeycomb grid to diffuse and straighten exhaust flow, reducing pressure loss and improving mist collection efficiency.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- PARKER ENGINEERING
- Filing Date
- 2026-04-03
- Publication Date
- 2026-07-17
AI Technical Summary
Conventional paint mist collection devices experience high pressure loss due to the discharge of paint exhaust at high speed through narrow openings, leading to a decrease in static pressure and increased pressure difference between the inlet and outlet.
The device employs a configuration of columnar baffle plates arranged in a staggered pattern with a flow straightening grid, increasing the cross-sectional area of the exhaust path and using a honeycomb rectifying grid to diffuse and straighten the exhaust flow, thereby reducing pressure loss and improving mist collection efficiency.
The solution results in reduced pressure loss and increased static pressure at the outlet, enhancing mist collection efficiency and transforming turbulent exhaust flow to laminar flow, while maintaining high mist collection performance.
Smart Images
Figure 0007891793000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a paint mist collection device disposed in a paint booth.
Background Art
[0002] The applicant of the present application disclosed in Patent Document 1 a paint mist collection device in which an aggregate of columnar baffle plates is housed in a box body forming an inlet opening and an outlet opening.
Prior Art Documents
Patent Documents
[0003]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0004] The paint exhaust passing through the aggregate of columnar baffle plates is discharged at high speed through a narrow opening between the columnar baffle plates forming the outlet of the aggregate, and the static pressure of the paint exhaust at the outlet of the paint mist collection device decreases. As a result, the pressure loss, which is the static pressure difference between the inlet and the outlet of the paint mist collection device, increases. An object of the present invention is to provide a paint mist collection device in which an aggregate of columnar baffle plates is housed in a box body forming an inlet opening and an outlet opening, and which has less pressure loss than conventional ones.
Means for Solving the Problems
[0005] To solve the above problems, the present invention provides a paint mist collection device in which an assembly of columnar baffle plates is housed in a box-shaped body having an inlet opening and an outlet opening, wherein when the direction from the inlet opening to the outlet opening is defined as the vertical direction and the direction perpendicular to the vertical direction is defined as the horizontal direction, multiple rows of columnar baffle plates, each consisting of multiple columnar baffle plates spaced apart from each other in the horizontal direction, are arranged in multiple rows of columnar baffle plates spaced apart from each other in the vertical direction, and the columnar baffle plates of vertically adjacent rows of columnar baffle plates are arranged in a staggered pattern, and between the assembly of columnar baffle plates and the outlet opening It covers the entire surface of the outlet opening on its own. The present invention provides a paint mist collection device characterized by having a flow straightening grid, and a gap extending laterally between the assembly of columnar baffle plates and the flow straightening grid. The high-speed paint exhaust flow discharged from the narrow opening between the columnar baffle plates that forms the outlet of the columnar baffle plate assembly diffuses through the gap between the columnar baffle plate assembly and the straightening grid to the entire suction surface of the straightening grid, and passes through the entire straightening grid. As a result, the cross-sectional area of the paint exhaust flow path increases, the flow velocity of the paint exhaust decreases, the static pressure of the paint exhaust is recovered, the static pressure of the paint exhaust at the outlet of the paint mist collection device increases, and the pressure loss, which is the static pressure difference between the paint exhaust at the inlet and outlet of the paint mist collection device, decreases.
[0006] In a preferred embodiment of the present invention, the rectifying grid is a honeycomb rectifying grid. In a preferred embodiment of the present invention, the flow straightening grid is a plate member having a number of openings. The flow straightening grid may be a honeycomb flow straightening grid, or a plate member having a large number of openings. In a preferred embodiment of the present invention, the present invention comprises a plurality of first horizontal plates, each having a plurality of elongated openings and a plurality of slits extending from the periphery to a point in the longitudinal extension of each elongated opening, with the slits sandwiched between them; a plurality of second horizontal plates, each having a plurality of elongated openings and a plurality of slits extending from the periphery to a point in the longitudinal extension of each elongated opening, with the slits sandwiched between them; and a plurality of vertical plates, each having a plurality of elongated openings and a plurality of slits extending from the periphery to a point in the longitudinal extension of each elongated opening, with the first horizontal plates and the second horizontal plates arranged alternately with gaps between them to form a horizontal plate assembly. Within the horizontal plate assembly, the portion between adjacent elongated openings of the second horizontal plate faces the elongated opening of the first horizontal plate, and the elongated opening of the second horizontal plate faces the portion between adjacent elongated openings of the first horizontal plate. Multiple vertical plates are arranged with gaps between them to form a vertical plate assembly. The vertical plate assembly aligns its own slits with the slits of the horizontal plate assembly and is inserted into the horizontal plate assembly. The horizontal plate assembly and the vertical plate assembly cooperate to form a lattice structure. A curved air passage is formed within the lattice structure. The portion between the openings of the horizontal plate and the vertical plate at the intersection of the horizontal and vertical plates forms individual columnar baffle plates, and the lattice structure forms an assembly of columnar baffle plates. The above configuration may be used to form an assembly of columnar baffle plates. In a preferred embodiment of the present invention, a gap is formed between the outlet-opening end of the grid structure and the flow straightening grid by forming a notch at the outlet-opening end of the vertical plate adjacent to the outlet opening. In a preferred embodiment of the present invention, the flow straightening grid comprises a flow straightening grid body and a frame, and a gap is formed between the outlet opening end of the grid structure and the flow straightening grid by the frame abutting against the outlet opening end of the vertical plate. A gap may be formed between the outlet-opening end of the grid structure and the flow straightening grid by forming a notch at the outlet-opening end of the vertical plate adjacent to the outlet opening, or a gap may be formed between the outlet-opening end of the grid structure and the flow straightening grid by bringing the frame of the flow straightening grid into contact with the outlet-opening end surface of the vertical plate. In a preferred embodiment of the present invention, notches are formed at both lateral ends of the horizontal plate. By forming notches at both lateral ends of the horizontal plates of the grid structure, the cross-sectional area of the flow path within the grid structure is increased, and pressure loss is reduced. In a preferred embodiment of the present invention, no notches are formed at the lateral ends of the horizontal plate facing the outlet opening. The notches prevent paint exhaust from passing straight through the grid structure, thereby suppressing a decrease in paint mist collection efficiency. In a preferred embodiment of the present invention, the inlet opening and the outlet opening face each other directly. In a preferred embodiment of the present invention, the inlet opening and the outlet opening are perpendicular to each other. The inlet and outlet openings may face each other directly, or they may be perpendicular to each other. [Brief explanation of the drawing]
[0007] [Figure 1] This is an external perspective view of a paint mist removal device according to an embodiment of the present invention. (a) shows a grid structure forming an assembly of columnar baffle plates, and (b) shows a box body. (c) is an enlarged view of a honeycomb flow straightening grid. [Figure 2] This is a front view of the first horizontal plate of a paint mist removal device according to an embodiment of the present invention. [Figure 3] This is a front view of the second horizontal plate of a paint mist removal device according to an embodiment of the present invention. [Figure 4] This is a front view of a horizontal plate assembly included in a paint mist removal device according to an embodiment of the present invention. [Figure 5] This is a front view of the first and second parts of a vertical plate included in a paint mist removal device according to an embodiment of the present invention. [Figure 6] This is a front view of the vertical plate formed by the first and second parts. [Figure 7] This is a front view of the vertical plate formed by the first and second parts. (a) is a diagram showing the relative positional relationship between the inlet opening, outlet opening, grid structure, and honeycomb flow straightening grid, and (b) is a diagram showing the relative positional relationship between the inlet opening, outlet opening, and grid structure of a conventional structure. [Figure 8] This is an enlarged view of the view taken along arrow aa in Figure 7(a), showing the positional relationship between the grid structure and the honeycomb flow rectifier grid. [Figure 9] It is a partial cross-sectional view of a paint mist removal device according to an embodiment of the present invention showing a bent exhaust passage and a columnar baffle plate. [Figure 10] It is a diagram showing the positional relationship between a lattice structure and a honeycomb rectifying lattice of a paint mist collecting device according to another embodiment of the present invention. (a) is a front view of a vertical plate formed of a first part and a second part, and (b) is an enlarged perspective view of the honeycomb rectifying lattice. [Figure 11] It is a front view of a first horizontal plate of a lattice structure of a paint mist collecting device according to another embodiment of the present invention. [Figure 12] It is a front view of a second horizontal plate of a lattice structure of a paint mist collecting device according to another embodiment of the present invention. [Figure 13] It is a perspective view of a paint mist collecting device according to another embodiment of the present invention. (a) is a perspective view of a box body, and (b) is a perspective view of a lattice structure.
Mode for Carrying Out the Invention
[0008] As shown in FIG. 1, a dry paint mist collecting device 1 according to an embodiment of the present invention includes a lattice structure 4 composed of three first horizontal plates 2a, three second horizontal plates 2b, and ten vertical plates 3, a box body 5 having an inlet opening 5a and an outlet opening 5b formed on opposite side surfaces, and a honeycomb rectifying lattice 6. The honeycomb rectifying lattice 6 is formed of paper. The lattice structure 4 is housed in the box body 5, and the honeycomb rectifying lattice 6 is disposed between the lattice structure 4 and the outlet opening 5b to constitute the paint mist collecting device 1. As shown in FIG. 7(a), a notch 3c is formed on an end surface of the vertical plate 3 facing the outlet opening 5b, and a gap 7 is formed between the lattice structure 4 and the honeycomb rectifying lattice 6. As shown in Figure 2, the first horizontal plate 2a is made of rectangular cardboard such as cardboard, thick paper, or corrugated cardboard, and has five elongated openings 2a1 that extend parallel to each other at predetermined intervals, and a plurality of slits 2a2 that extend from the periphery on one end of the elongated opening 2a1 in the longitudinal direction to the periphery on the other end of the elongated opening 2a1, with the elongated opening 2a1 in between, to a point along the longitudinal extension of the elongated opening 2a1. As shown in Figure 3, the second horizontal plate 2b is made of rectangular cardboard such as cardboard, thick paper, or corrugated cardboard, and has four elongated openings 2b1 that extend parallel to each other at predetermined intervals, and a plurality of slits 2b2 that extend from the periphery on one end of the elongated opening 2b1 in the longitudinal direction to the periphery on the other end of the elongated opening 2b1, with the elongated opening 2b1 in between, to a point partway along the longitudinal extension of the elongated opening 2b1. As can be seen from Figure 1, the first horizontal plate 2a and the second horizontal plate 2b are arranged alternately with gaps between them to form a horizontal plate assembly 2'. As shown in Figure 4, within the horizontal plate assembly 2', the portion of the second horizontal plate 2b between adjacent elongated openings 2b1 faces the elongated opening 2a1 of the first horizontal plate 2a, and the elongated opening 2b1 of the second horizontal plate 2b faces the portion of the first horizontal plate 2a between adjacent elongated openings 2a1. When the openings 2a1 and 2b1 are viewed from the front, the slits 2a2 and 2b2 overlap, as shown in Figure 4.
[0009] As shown in Figure 5, the vertical plate 3 is composed of a first part 3a made of rectangular cardboard such as cardboard, thick paper, or corrugated cardboard, which has five elongated openings 3a1 extending parallel to each other at predetermined intervals, and a plurality of slits 3a2 extending from the periphery of one end of the elongated opening 3a1 in the longitudinal direction to partway along the elongated opening 3a1, with the elongated openings 3a1 in between. The second part 3b is made of rectangular cardboard such as cardboard, thick paper, or corrugated cardboard, which has five elongated openings 3b1 extending parallel to each other at predetermined intervals, and a plurality of slits 3b2 extending from the periphery of one end of the elongated opening 3b1 in the longitudinal direction to partway along the elongated opening 3b1, with the elongated openings 3b1 in between. The first part 3a and the second part 3b are formed in a symmetrical shape. As shown in Figures 1 and 6, the first portion 3a and the second portion 3b abut each other at their respective ends to form a vertical plate 3. As can be seen from FIG. 1, the first portions 3a of the ten vertical plates 3 are arranged with gaps therebetween to form the first vertical plate assembly 3', and the second portions 3b of the ten vertical plates 3 are arranged with gaps therebetween to form the second vertical plate assembly 3".
[0010] As shown in FIG. 1, the first vertical plate assembly 3' aligns its slit 3a2 with the slits 2a2 and 2b2 of the horizontal plate assembly 2' and is inserted into the horizontal plate assembly 2' from the periphery at one longitudinal end side of the elongated openings 2a1 and 2b1. The second vertical plate assembly 3" aligns its slit 3b2 with the slits 2a2 and 2b2 of the horizontal plate assembly 2' and is inserted into the horizontal plate assembly 2' from the periphery at the other longitudinal end side of the elongated openings 2a1 and 2b1. The horizontal plate assembly 2', the first vertical plate assembly 3', and the second vertical plate assembly 3" cooperate to form a lattice structure 4 composed of three first horizontal plates 2a, three second horizontal plates 2b, and ten vertical plates 3. Inside the lattice structure 4, a bent air passage is formed by the gaps between the cardboard sheets constituting the horizontal plate assembly 2', the first vertical plate assembly 3', and the second vertical plate assembly 3", and the openings 2a1, 2b1, 3a1, and 3b1. As shown in FIG. 9, the portions sandwiched between the openings 2a1 and 2b1 of the horizontal plates 2a and 2b and the portions sandwiched between the openings 3a1 and 3b1 of the vertical plates 3a and 3b cooperate to form the columnar baffle plates 8. Therefore, the lattice structure 4 is also an assembly of the columnar baffle plates 8. As can be seen from FIG. 9, when the direction from the inlet opening 5a to the outlet opening 5b is taken as the vertical direction and the direction perpendicular to the vertical direction is taken as the horizontal direction, a plurality of columnar baffle plate rows composed of a plurality of columnar baffle plates 8 arranged at intervals in the horizontal direction are arranged at intervals in the vertical direction, and the columnar baffle plates 8 of the columnar baffle plate rows adjacent in the vertical direction are staggeredly arranged. The lattice structure 4, which is an assembly of the columnar baffle plates 8, and the honeycomb rectification lattice 6 are housed in a box body 5 formed of cardboard such as corrugated paper, cardboard, and cardboard box paper to constitute the paint mist collection device 1. The inlet opening 5a and the outlet opening 5b formed on the opposite side surfaces of the box body 5 face the elongated openings 2a1 and 2b1 of the lattice structure 4. As shown in FIGS. 7 and 8, the honeycomb rectification lattice | grid 6 faces the second horizontal plate 2b facing the outlet opening 5b. One end of an exhaust duct (not shown) is connected to the outlet opening 5b side of the box body 5, and an exhaust fan (not shown) is installed at the other end of the exhaust duct.
[0011] This section explains the operation and effects of the paint mist collection device 1. The exhaust from the paint booth (not shown) flows into the box body 5 through the inlet opening 5a, and further flows into the grid structure 4, forming an exhaust flow as shown by the white arrows in Figure 1. As shown in Figure 9, it passes through the curved air passage formed by the gaps between the cardboard constituting the horizontal plate assembly 2', the first vertical plate assembly 3', and the second vertical plate assembly 3'' and the openings 2a1, 2b1, 3a1, and 3b1, and flows out of the box body 5 through the outlet opening 5b. As the exhaust passes through the curved air passage, it collides with the columnar baffle plate 8 formed by the cooperation of the portions sandwiched between the openings 2a1, 2b1 of the horizontal plates 2a, 2b and the portions sandwiched between the openings 3a1, 3b1 of the vertical plates 3a, 3b. Paint mist adheres to the columnar baffle plate 8, and the paint mist is collected. The exhaust from the paint booth, from which the paint mist has been removed, is discharged as a high-speed turbulent flow from the elongated opening 2b1 of the second horizontal plate 2b facing the outlet opening 5b, diffuses through the gap 7 into the entire space between the second horizontal plate 2b facing the outlet opening 5b and the honeycomb straightening grid 6, and subsequently diffuses into the entire suction surface of the honeycomb straightening grid 6, passes through the entire honeycomb straightening grid 6, is straightened, and is discharged from the paint mist collection device 1 through the outlet opening 5b. As the high-speed turbulent flow of paint exhaust discharged from the elongated opening 2b1 diffuses across the entire suction surface of the honeycomb straightening grid 6 and passes through the entire honeycomb straightening grid 6, the paint exhaust is slowed down due to the increase in the flow path cross-sectional area and static pressure is recovered. As a result, the static pressure of the paint exhaust discharged from the paint mist collection device 1 increases compared to when the honeycomb straightening grid 6 is not installed. Consequently, the pressure loss of the paint mist collection device 1, which is the difference between the static pressure at the inlet (atmospheric pressure) and the static pressure at the outlet, decreases compared to the conventional structure shown in Figure 7(b) without the honeycomb straightening grid 6. The installation of the honeycomb flow straightening grid 6 increases the flow area and decreases the flow velocity, so fine paint mist contained in the paint exhaust that has passed through the grid structure 4 adheres to the honeycomb flow straightening grid 6 and is removed from the paint exhaust. As a result, the mist collection efficiency of the paint mist collection device is improved compared to when the honeycomb flow straightening grid 6 is not installed. Furthermore, the exhaust flow in the exhaust duct (not shown) connected to the outlet opening 5b changes from conventional turbulent flow to laminar flow due to the arrangement of the honeycomb rectifier grid 6, thus reducing the pressure loss in the exhaust duct. The lattice structure 4, in which the vertical plate assembly is inserted into the horizontal plate assembly, has no adhesive or other fixing points, so it can be easily folded and easily restored to a three-dimensional structure from the folded state. Folding it makes it easier to transport the paint mist collection device 1. The paint mist collection device 1, made of paper, is lightweight and easy to transport, and also easy to dispose of after use.
[0012] As shown in Figure 10, the honeycomb flow straightening grid 6 may be composed of a flow straightening grid body 6a and a frame 6b, and the frame 6b may be brought into contact with the outer edge of the grid structure 4 to form a gap 7 between the grid structure 4 and the honeycomb flow straightening grid body 6a. As shown in Figures 11 and 12, elongated notches 2a3 and 2b3 may be formed at both ends of the horizontal plates 2a and 2b. This increases the cross-sectional area of the flow path within the grid structure 4, reducing the pressure loss of the paint mist collection device 1. The shape, dimensions, and height position of the notches 2a3 and 2b3 are not limited to the above embodiment. When elongated notches 2a3 and 2b3 are formed at both ends of the horizontal plates 2a and 2b, it is preferable not to form notches 2a3 or 2b3 at both ends of the horizontal plate facing the outlet opening 5b. This prevents paint exhaust from passing straight through the grid structure 4 via the notches 2a3 and 2b3, thereby suppressing a decrease in the paint mist collection efficiency. The structure of the assembly of columnar baffle plates is not limited to the structure described above. Any combination of columnar baffle plates is acceptable. The opening shape of the rectifier grid 5 is not limited to a honeycomb structure. Any shape and dimensions that minimize viscous resistance are acceptable. The rectifier grid 5 is not limited to a honeycomb rectifier grid. It may be a plate member having a large number of openings. The number of horizontal boards 2a and 2b and the number of vertical boards 3 are not limited to the above embodiment. The shape and dimensions of the openings 2a1, 2b1, 3a1, and 3b1 are not limited to the above embodiment. In the above embodiment, the inlet openings 5a and 5b of the box body 5 faced each other, but as shown in Figure 13, the inlet opening 5a and the outlet opening 5b may be oriented in directions perpendicular to each other. In this case, in order to straighten the paint exhaust flow that flows into the box body 5 from the inlet opening 5a and bends 90 degrees toward the lattice structure 4, which is an assembly of columnar baffle plates 8, the vertical plate 3 is extended toward the inlet opening 5a, and the extended portion 3d functions as a straightening plate, and a straightening grid 6 is placed between the lattice structure 4 and the outlet opening 5b. [Industrial applicability]
[0013] This invention is widely applicable to paint mist collection devices. [Explanation of symbols]
[0014] 1. Paint mist collection device 2a 1st horizontal board 2b 2nd horizontal board 3 vertical boards 3d extension 4 Lattice structure 5 box body 5a Entrance opening 5b Exit opening 6 Honeycomb rectifier grid 7. Gap between the lattice structure and the honeycomb rectifier lattice. 8. Columnar baffle plate
Claims
1. A paint mist collection device comprising a collection of columnar baffle plates housed in a box-shaped body having an inlet opening and an outlet opening, wherein, when the direction from the inlet opening to the outlet opening is defined as the vertical direction and the direction perpendicular to the vertical direction is defined as the horizontal direction, multiple rows of columnar baffle plates, each consisting of multiple columnar baffle plates spaced apart from each other in the horizontal direction, are arranged multiple times in the vertical direction at intervals from each other, with the columnar baffle plates of vertically adjacent rows of columnar baffle plates arranged in a staggered pattern, a flow straightening grid that covers the entire surface of the outlet opening is placed between the collection of columnar baffle plates and the outlet opening, and a gap extending horizontally is formed between the collection of columnar baffle plates and the flow straightening grid.
2. The paint mist collection device according to claim 1, characterized in that the rectifying grid is a honeycomb rectifying grid.
3. The paint mist collection device according to claim 1, characterized in that the rectifying grid is a plate member having a large number of openings.
4. The device comprises a plurality of first horizontal plates, each having a plurality of elongated openings and a plurality of slits extending from the periphery to a point along the longitudinal extension of each elongated opening, with the slits sandwiched between them; a plurality of second horizontal plates, each having a plurality of elongated openings and a plurality of slits extending from the periphery to a point along the longitudinal extension of each elongated opening, with the slits sandwiched between them; and a plurality of vertical plates, each having a plurality of elongated openings and a plurality of slits extending from the periphery to a point along the longitudinal extension of each elongated opening, with the first horizontal plates and second horizontal plates arranged alternately with gaps between them to form a horizontal plate assembly, and within the horizontal plate assembly, the elongated openings of adjacent second horizontal plates A paint mist collection device according to any one of claims 1 to 3, characterized in that the intermediate portion faces the elongated opening of the first horizontal plate, the elongated opening of the second horizontal plate faces the portion between adjacent elongated openings of the first horizontal plate, a plurality of vertical plates are arranged with gaps between them to form a vertical plate assembly, the vertical plate assembly aligns its own slits with the slits of the horizontal plate assembly and is inserted into the horizontal plate assembly, the horizontal plate assembly and the vertical plate assembly cooperate to form a lattice structure, a curved air passage is formed within the lattice structure, the portion sandwiched between the openings of the horizontal plate and the vertical plate at the intersection of the horizontal plate and the vertical plate forms individual columnar baffle plates, and the lattice structure forms an assembly of columnar baffle plates.
5. The paint mist collection device according to claim 4, characterized in that a gap is formed between the outlet opening end of the grid structure and the flow straightening grid by forming a notch at the outlet opening end of the vertical plate adjacent to the outlet opening.
6. The paint mist collection device according to claim 4, characterized in that the straightening grid has a straightening grid body and a frame, and a gap is formed between the outlet opening end of the grid structure and the straightening grid by the frame abutting against the outlet opening end of the vertical plate.
7. The paint mist collection device according to claim 4, characterized in that notches are formed at both lateral ends of the horizontal plate.
8. The paint mist collection device according to claim 7, characterized in that no notches are formed at both lateral ends of the horizontal plate facing the outlet opening.
9. The paint mist collection device according to claim 4, characterized in that the inlet opening and the outlet opening face each other directly.
10. The paint mist collection device according to claim 4, characterized in that the inlet opening and the outlet opening are perpendicular to each other.