JP2018001045A - Painting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a painting system which can generate clean air by eliminating a harmful substance from exhaust air which is composed of a volatile organic compound and paint mist and contains the harmful substance.SOLUTION: An air cleaning mechanism 13 of a painting system 10 is structured of a multilayer filter structure 31 formed by superimposing porous filter materials having a predetermined thickness and predetermined area, an oily solution which maintains the entire multilayer filter structure 31 in a wet state, and supply means 34 which supplies the oily solution to the multilayer filter structure 31. In the painting system 10, exhaust air is passed in the multilayer filter structure 31 in the wet state by the oily solution, and a harmful substance contained in the exhaust air is collected by the oily solution.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a coating system that supplies mixed air obtained by mixing clean air obtained by removing harmful substances from exhaust air and outside air to a coating booth.

  A painting booth in which the upper part is a painting room and the lower part is an exhaust room and exhaust air can flow from the painting room to the exhaust room; a coating machine provided in the painting room for spraying paint as paint particles toward the object to be coated; A paint separator having a filter installed in the exhaust chamber and separating the paint particles carried from the paint chamber together with the exhaust air from the exhaust air, and a precoat material is ejected toward the exhaust air flowing into the paint separator A pre-coating material jetting device, wherein the paint separating device accommodates the filter while the upper side is open and the lower side is a hopper that receives the collected matter collected by the filter; An upper cover that closes the upper opening, and an exhaust air inflow passage that guides the exhaust air upward from the lower side toward the upper side of the filter is between the filter housing cover and the upper cover. Made is, paint booth apparatus spout is positioned in the exhaust air inlet passage of the precoat material discharge device is disclosed (see Patent Document 1).

JP 2016-36757 A

  The coating booth device disclosed in Patent Document 1 is a precoat material that is ejected from a precoat material ejecting device and adsorbs paint particles contained in exhaust air in a filter of the paint separation device. At the same time, the paint particles can be separated and purified air can be generated. Volatile organic compounds (hydrocarbons such as benzene, toluene, xylene, and organic chlorine compounds such as trichloroethylene, tetrachloroethylene, dichloroethane, etc.) contained in the oil paint are scattered when the oil-based paint is applied to the object. Exhaust air containing volatile organic compounds is exhausted from the paint booth, but in the paint booth device disclosed in Patent Document 1, volatile organic compounds pass through the filter of the paint separator and collect the volatile organic compounds in the filter. The exhaust air containing the volatile organic compound is discharged to the outside and the atmosphere is polluted by the volatile organic compound. Furthermore, the exhaust air containing the volatile organic compound may return to the painting booth again, and the worker working in the painting booth may inhale the volatile organic compound to harm the worker's health.

  It is an object of the present invention to remove harmful substances from exhaust air containing harmful substances composed of at least volatile organic compounds of volatile organic compounds and paint mist, and to provide clean air from which harmful substances have been removed from exhaust air. It is to provide a coating system that can be produced. Another object of the present invention is that clean air can be supplied to the painting booth, and the clean air can be exhausted to the outside, polluting the atmosphere and the health of workers working in the painting booth. The object of the present invention is to provide a painting system capable of performing painting work in a favorable environment.

  The premise of the present invention to solve the above-mentioned problems is that a predetermined volume of a coating booth for applying a paint to an object to be coated, and an exhaust air containing a toxic substance composed of at least a volatile organic compound and a coating mist. A recovery mechanism that collects air from the paint booth, an air cleaning mechanism that collects harmful substances from the exhaust air recovered by the recovery mechanism to generate clean air, and clean air and outside air generated by the air cleaning mechanism are mixed. An air supply mechanism that supplies mixed air to the painting booth, and the air supply mechanism exhausts a part of the mixed air and supplies the remaining mixed air to the painting booth.

  As a feature of the present invention based on the above premise, the air purifying mechanism is made of a synthetic fiber and has a predetermined thickness and a predetermined area and a porous filter material, and is supplied to the filter material to keep the entire filter material in a wet state. An oil solution and a supply means for supplying the oil solution to the filter material are formed. The coating system allows exhaust air to flow through the filter material in a wet state by the oil solution and removes harmful substances contained in the exhaust air from the oil solution. It is to be collected.

  As an example of the present invention, the air cleaning mechanism forms a multilayer filter structure in which a plurality of filter materials are arranged in the air flow direction in a state in which the surfaces thereof are overlapped, and the supply means includes air in the multilayer filter structure. Oily solution is supplied to the upper end of the rearmost filter material located in the rear of the flow direction, and the oily solution infiltrates from the rearmost filter material to the filter material located in the front of the airflow direction. While flowing from the upper end part of a filter material toward a lower end part, it flows out downward from the lower end part of these filter materials.

  As another example of the present invention, the air cleaning mechanism includes a honeycomb laminated filter having a predetermined thickness and a predetermined area, which is installed on the downstream side of the multilayer filter structure, and the supplying means is oily at the upper end of the honeycomb laminated filter. A solution is supplied to keep the entire area of the honeycomb multilayer filter wet, and the oily solution flows from the upper end to the lower end of the honeycomb multilayer filter and flows downward from the lower end of the honeycomb multilayer filter. However, exhaust air is allowed to flow through the honeycomb laminated filter in a wet state by the oil solution, and harmful substances contained in the exhaust air are collected in the oil solution.

  As another example of the present invention, the supply means is located below the multilayer filter structure and the honeycomb multilayer filter, and a storage tank that stores an oily solution that has flowed downward from the multilayer filter structure and the honeycomb multilayer filter; A circulating pump for supplying the oily solution contained in the containing tank to the upper end of the filter material and the upper end of the honeycomb laminated filter, and a strainer for filtering harmful substances collected in the oily solution. The oily solution is caused to flow from the upper end portion to the lower end portion of the filter material while the oily solution is caused to flow from the upper end portion to the lower end portion of the honeycomb laminated filter.

  As another example of the present invention, the air cleaning mechanism includes supply amount adjusting means for adjusting the supply amount of the oily solution supplied to the multilayer filter structure and the honeycomb laminated filter, and the supply amount adjusting means is provided in the painting booth. When the air supply amount of the mixed air to be supplied is large, when the supply amount of the oil solution supplied to the multilayer filter structure and the honeycomb laminated filter is increased, and when the air supply amount of the mixed air supplied to the coating booth is small, The amount of oily solution supplied to the multilayer filter structure and the honeycomb laminated filter is reduced.

  As another example of the present invention, the air supply mechanism includes a deodorizing device that removes odors contained in the mixed air.

  As another example of the present invention, the air supply mechanism includes an air conditioner that adjusts at least one of the temperature and humidity of the mixed air.

  As another example of the present invention, the air supply mechanism includes an air supply fan for forcibly supplying mixed air, an inflow amount adjusting means for adjusting the inflow amount of outside air, and an exhaust amount of the mixed air to the outside. An exhaust amount adjusting means for adjusting, and an air amount adjusting means for adjusting the amount of air supplied to the painting booth of the mixed air, and a predetermined ratio of the mixed air is externally provided by the exhaust amount adjusting means and the air amount adjusting means. While exhausting, a larger proportion of mixed air than the mixed air exhausted to the outside is supplied from the ceiling of the painting booth, and the recovery mechanism causes the exhaust air to flow under the floor of the painting booth. To flow into.

  As another example of the present invention, the air supply mechanism maintains the chamber pressure of the painting booth at a positive pressure by the exhaust air amount adjusting means and the air supply amount adjusting means.

  As another example of the present invention, an air supply mechanism is installed at an outside air intake to collect dust contained in outside air, and an air filter is installed at the ceiling of a painting booth to remove dust contained in mixed air. An air filter to be collected.

  As another example of the present invention, the oily solution is liquid petrolatum.

  According to the coating system of the present invention, exhaust air is caused to flow through a filter material in a wet state by an oily solution supplied to the filter material, and at least volatility of a volatile organic compound contained in the exhaust air and the coating mist. By collecting harmful substances consisting of organic compounds in the oily solution, it is possible to remove the volatile organic compounds generated when applying the oil-based paint to the object to be coated and the harmful substances of the paint mist from the exhaust air. It is possible to generate clean air from which volatile organic compounds and paint mist are removed from the air. The painting system can supply clean air, which removes harmful substances from the exhaust air, to the painting booth, so that workers working in the painting booth do not inhale volatile organic compounds and painting mist, so It is possible to carry out the painting work in a good environment without harming.

  The last filter material in which a plurality of filter materials form a multilayer filter structure arranged in the air flow direction with their surfaces overlapped, and the supply means is located at the rear of the multilayer filter structure in the air flow direction An oily solution is supplied to the upper end of the filter, and the oily solution infiltrates from the rearmost filter material toward the filter material located in front of the air flow direction, and flows from the upper end of the filter material toward the lower end. In addition, the coating system that flows downward from the lower end portions of the filter materials supplies an oily solution from the upper end portions of the multilayer filter structure formed of a plurality of filter materials, and the oily solution is lowered from the lower end portions of the filter materials. Therefore, the oily solution does not stay in the filter material, and the oily solution in which harmful substances are collected can be replaced with a new one. Not be saturated with harmful substances, it is possible to reliably collecting harmful substances in oily solution, it is possible to reliably remove harmful substances of volatile organic compounds or paint mist from the exhaust air. The exhaust air flow rate in the multilayer filter structure is gradually slowed by the air resistance of the filter material, and the exhaust air flow rate in the filter material located in front of the air flow direction is high and located in the rear of the air flow direction. Although the flow rate of the exhaust air in the filter material is slowed down, the coating system supplies the oil solution to the upper end of the last filter material located behind the multilayer filter structure in the air flow direction. Infiltrate from the last filter material toward the filter material located in front of the air flow direction, the flow rate of the oily solution in the filter material located in front of the air flow direction becomes slow, and the air flow direction front Even if the exhaust air quickly flows through the filter material located at the position of the filter material, the contact time of the exhaust air with the molecules of the oily solution can be extended, and the exhaust air contains That the harmful substances can be trapped in the oily solution, it is possible to reliably remove the harmful substances contained in the exhaust air by using a multi-layer filter construction.

  An air cleaning mechanism is installed on the downstream side of the multilayer filter structure and includes a honeycomb multilayer filter having a predetermined thickness and a predetermined area. Supply means supplies an oily solution to the upper end of the honeycomb multilayer filter to wet the entire area of the honeycomb multilayer filter. The oil-based solution flows from the upper end portion to the lower end portion of the honeycomb multilayer filter, flows downward from the lower end portion of the honeycomb multilayer filter, and exhaust air is discharged to the honeycomb multilayer filter in a wet state by the oil solution. The coating system that collects harmful substances contained in the exhaust air by collecting the harmful substances contained in the exhaust air and collecting the harmful substances in the oily solution is a multi-layer filter structure. An oily solution that flows through the entire area of the honeycomb laminated filter installed on the downstream side of the multilayer filter structure even if it passes Harmful substances can be collected, honeycomb laminated filter can be used to remove residual harmful substances from the exhaust air, and to generate clean air from which volatile organic compounds and paint mist are removed from the exhaust air Can do.

  The supply means is located below the multilayer filter structure and the honeycomb multilayer filter, and stores the multilayer filter structure and the oil solution that flows downward from the honeycomb multilayer filter, and the oil solution stored in the storage tank. A circulating pump that supplies the upper end of the filter material and the upper end of the honeycomb laminated filter, and a strainer that filters harmful substances collected in the oily solution. The oily solution is circulated while circulating the oily solution. The coating system that causes the oily solution to flow from the upper end portion to the lower end portion of the material and also flows from the upper end portion to the lower end portion of the honeycomb laminated filter, harmful substances collected in the oily solution are filtered by the strainer, Oily solutions do not saturate with harmful substances. Since it is supplied to filter materials and honeycomb laminated filters, it is possible to reliably collect harmful substances using a new oily solution filtered with harmful substances, and exhaust harmful substances of volatile organic compounds and paint mist. It can be reliably removed from the air.

  The air cleaning mechanism includes supply amount adjusting means for adjusting the supply amount of the oily solution supplied to the multilayer filter structure and the honeycomb laminated filter, and the supply amount adjusting means is configured to control the supply amount of the mixed air supplied to the coating booth. If there are many, the supply amount of the oil solution supplied to the multilayer filter structure and the honeycomb multilayer filter is increased, and if the supply amount of the mixed air supplied to the coating booth is small, the multilayer filter structure and the honeycomb multilayer filter are separated. The coating system that reduces the supply amount of the oil solution to be supplied increases the supply amount of the oil solution supplied to the multilayer filter structure and the honeycomb laminated filter when the supply amount of the mixed air supplied to the coating booth is large. By supplying new oily solutions filtered with harmful substances to these filters, preventing the saturation of harmful substances in the oily solutions, the volatility contained in the mixed air Toxic substances machine compounds or paint mist can be reliably collected in the oily solution, it is possible to ensure removal of harmful substances from the exhaust air. When the amount of mixed air supplied to the coating booth is small, the coating system reduces the amount of oil solution supplied to the multilayer filter structure and the honeycomb multilayer filter, thereby reducing waste of oil solution supply. This saves the power consumption of the circulation pump and saves the system energy.

  The coating system that includes a deodorizing device in which the air supply mechanism removes the odor contained in the mixed air is removed from the odor contained in the mixed air by the deodorizing device, and the mixed air from which the odor has been removed is supplied to the painting booth. The unpleasant odor accompanying painting does not fill the painting booth, and the painting work can be performed in a comfortable environment.

  A painting system that includes an air conditioner in which the air supply mechanism adjusts at least one of the temperature and humidity of the mixed air has a favorable temperature environment in the painting booth by adjusting the temperature inside the painting booth with the air conditioner. And can perform painting work in a comfortable environment. For example, when applying water-based paint to an object to be coated in a paint booth, if the humidity inside the paint booth is high, drying of the water-based paint is delayed, but the air conditioner reduces the humidity inside the paint booth. Thus, drying of the water-based paint can be accelerated, and the efficiency of the painting work can be improved. In the painting system, if the humidity inside the painting booth is lower than necessary, the water-based paint dries quickly and the leveling of the painting surface decreases, but the air conditioner increases the humidity inside the painting booth, Early drying of the coating surface can be prevented, the leveling of the painted surface can be prevented from being lowered, and an increase in painting failure can be prevented. In addition, when applied with water-based paint, it may be applied again with oil-based paint, but volatile organic compounds generated from oil-based paint and harmful substances of paint mist can be collected in oil-based solution, and exhaust air Can remove harmful substances from

  An air supply mechanism for forcibly supplying mixed air; an inflow amount adjusting means for adjusting an inflow amount of outside air; an exhaust amount adjusting means for adjusting an exhaust amount of the mixed air to the outside; An air supply amount adjusting means for adjusting an air supply amount to the painting booth, and exhausting a predetermined ratio of the mixed air to the outside by the exhaust amount adjusting means and the air supply amount adjusting means. A coating system that supplies a larger proportion of mixed air than the air from the ceiling of the painting booth, the recovery mechanism flows exhaust air under the floor of the painting booth, and exhaust air flows from below the floor into the air cleaning mechanism By exhausting the mixed air to the outside, fresh outside air can be taken inside the painting booth, and the concentration of carbon dioxide in the painting booth will not increase, and it will not harm the health of workers. It is possible to perform the painting work in such environment.

  The painting system in which the air supply mechanism maintains the chamber pressure of the painting booth at a positive pressure by means of the exhaust air amount adjusting means and the air amount adjusting means, when the chamber pressure of the painting booth becomes negative pressure, the exhaust air containing harmful substances is recovered However, it is not possible to generate clean air by flowing back to the painting booth, but by maintaining the paint booth chamber pressure at a positive pressure, the exhaust air is reliably recovered by the recovery mechanism, and the exhaust air is turned into the air cleaning mechanism. Clean air from which harmful substances can be removed can be supplied to the painting booth.

  A painting in which the air supply mechanism is installed at the outside air intake and collects dust contained in the outside air, and an air filter installed on the ceiling of the painting booth and collects dust contained in the mixed air The system uses these air filters to remove the dust contained in the outside air and mixed air, so the mixed air from which the dust has been removed can be supplied to the painting booth, and the mixed air from which the dust has been removed. The painting can be done in a comfortable environment filled with

  The coating system in which the oily solution is liquid petrolatum collects harmful substances consisting of at least volatile organic compounds in the exhaust air and paint mist in the liquid petrolatum, thereby collecting volatile organic compounds and coatings. Mist can be collected in liquid petrolatum, and volatile organic compounds generated when applying an oil-based paint to the object to be coated and harmful substances in the paint mist can be removed from the exhaust air and volatile from the exhaust air. It is possible to generate clean air from which an organic compound or paint mist is removed.

The side view of the coating system shown as an example. Perspective view of honeycomb laminated filter shown as an example The top view of a painting system. The front view of a painting system. The rear view of a painting system. The side view of the painting system which shows the inside of a painting booth. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. The side view of the air purifying mechanism and air supply mechanism shown as an example. The perspective view of the multilayer filter structure shown as an example. The perspective view of the multilayer filter structure shown as another example. The perspective view of the honeycomb laminated filter shown as an example. The side view of the painting system which shows the inside of the painting booth of an operation state. The perspective view of the multilayer filter structure which shows the flow of an oily solution. The perspective view of another example of the multilayer filter structure which shows the flow of an oily solution. The perspective view of the honeycomb laminated filter which shows the flow of an oily solution.

  The details of the coating system according to the present invention will be described with reference to the accompanying drawings such as FIG. 1 which is a side view of the coating system 10 shown as an example. 2 is a top view of the coating system 10, and FIG. 3 is a front view of the coating system 10. FIG. 4 is a rear view of the painting system 10, and FIG. 5 is a side view of the painting system 10 showing the inside of the painting booth 11. 6 is a cross-sectional view taken along the line AA in FIG. 2, and FIG. 7 is a side view of the air cleaning mechanism 13 and the air supply mechanism 14 shown as an example. FIG. 8 is a perspective view of a multilayer filter structure 31 shown as an example, and FIG. 9 is a perspective view of a multilayer filter structure 31 shown as another example. FIG. 10 is a perspective view of a honeycomb laminated filter 32 shown as an example. In FIG. 1, the air cleaning mechanism 13, the sensors 25, 26, and 27, and the air filters 58 and 61 are indicated by solid lines.

  The coating system 10 is used when a paint is applied to an object to be coated. Although the automobile 66 is illustrated as an object to be coated in FIG. 5, the object to be coated is not limited to the automobile 66, and the painting system 10 can be used for painting any object to be painted. The coating system 10 collects harmful substances from the exhaust air a1, a coating booth 11 having a predetermined volume for applying paint to the automobile 66 (object to be coated), a recovery mechanism 12 for recovering the exhaust air a1 from the paint booth 11. And an air supply mechanism 14 for supplying the coating booth 11 with mixed air a4 obtained by mixing the clean air a2 and the outside air a3 generated by the air cleaning mechanism 13. Yes.

  The painting booth 11 is a panel booth in which a plurality of panels 15 are connected, and employs a vertical pumping type. A semi-down method can also be adopted. In the painting booth 11, both side walls 16, a ceiling 17, a floor 18, and a rear wall 19 are made by each panel 15. The painting booth 11 has a door 20 on the side wall 16 and an entrance / exit 21 of the automobile 66 on the front. A controller 22 (control device) is attached to the side wall 16 of the painting booth 11. A lighting fixture 23 is installed on the ceiling 17 of the painting booth 11. A housing 24 extending in the vertical direction is installed on the rear wall 19 of the painting booth 11.

  Although not shown, the painting booth 11 is provided with various painting facilities (spray gun, electrostatic painting machine, air brush, painting stirrer, compressor, etc.). In the painting booth 11, the entrance / exit 21 is opened and the automobile 66 is transported into the booth 11, and then the entrance / exit 21 is closed to perform painting work on the painted surface of the automobile 66 by painting equipment.

  Inside the painting booth 11, a room pressure sensor 25, a temperature sensor 26, and a humidity sensor 27 are installed. The room pressure sensor 25, the temperature sensor 26, and the humidity sensor 27 are connected to the controller 22. The room pressure sensor 25 measures the room pressure inside the painting booth 11 and transmits the measured measurement room pressure to the controller 22. The temperature sensor 26 measures the temperature inside the painting booth 11 and transmits the measured temperature to the controller 22. The humidity sensor 27 measures the humidity inside the painting booth 11 and transmits the measured humidity to the controller 22. A concentration sensor that measures the concentration of carbon monoxide and a combustible gas leak detector that detects a leak of combustible gas may be installed.

  The controller 22 (control device) includes a microcomputer having a central processing unit and a memory and a storage device. Input / output devices such as a numeric keypad unit (not shown), a display (not shown), and a touch panel (not shown) are connected to the controller 22. The storage device of the controller 22 includes a set room pressure of the paint booth 11, a set temperature of the paint booth 11, a set humidity of the paint booth 11, and a set output of the supply fan 54 (flow rate of the mixed air a <b> 4 flowing into the paint booth 11) In addition, the supply ratio of the mixed air a4 (the ratio of the mixed air a4 flowing into the painting booth 11) and the exhaust ratio of the mixed air a4 (the ratio of the mixed air a4 exhausted to the outside) are stored (stored). The set chamber pressure, set temperature, set humidity, set output (flow rate of the mixed air a4), supply rate, and exhaust rate can be freely changed by the numeric keypad unit.

  The storage device of the controller 22 includes an oil solution 33 supplied to the output multilayer filter structure 31 (filter material 30) of the output of the air supply fan 54 (flow rate of the mixed air a4 flowing into the painting booth 11) and the circulation pump 46. (Corresponding supply amount) is stored (stored). In the storage device of the controller 22, the opening degree of the swirl vane of the motor damper 62 corresponding to the supply ratio of the mixed air a4 (the ratio of the mixed air a4 flowing into the painting booth 11), the exhaust ratio of the mixed air a4 (externally) The opening degree of the rotating blades of the motor damper 63 and the motor damper 64 corresponding to the ratio of the mixed air a4 to be exhausted) is stored (stored).

  The recovery mechanism 12 includes a plurality of air recovery ports (not shown) provided on the floor 18 of the painting booth 11 and a recovery duct that is installed under the floor 28 of the painting booth 11 and extends between the entrance 21 and the rear wall 19. 29. Exhaust air a4 that has passed through the air recovery port flows into the recovery duct 29. The recovery duct 29 is connected to the lower portion of the housing 24 and communicates with the housing 24, and allows the exhaust air a <b> 4 to flow into the air cleaning mechanism 13 from the housing 24.

  When an oil paint is applied to the automobile 66 (object to be coated) in the paint booth 11, volatile organic compounds (hydrocarbons such as benzene, toluene, xylene, etc.), organic chlorine-based compounds such as trichloroethylene, tetrachloroethylene, dichloroethane, etc. The compound) scatters, and the paint mist of the oil-based paint scatters and disperses in the air. The exhaust air a4 collected from the painting booth 11 contains toxic substances composed of volatile organic compounds and painting mist.

  The air cleaning mechanism 13 is installed in the lower part of the housing 24. The air cleaning mechanism 13 includes a multilayer filter structure 31 made of a plurality of porous (porous structures) filter materials 30, a honeycomb multilayer filter 32, an oily solution 33, a multilayer filter structure 31, and a honeycomb multilayer filter 32. And a supply means 34 for supplying the oily solution 33. These filter materials 30 are the nonwoven fabric or felt made from the synthetic fiber, and have predetermined thickness and predetermined area. These filter materials 30 are arranged in the air flow direction (thickness direction) with their surfaces overlapped. These filter members 30 overlap in the air flow direction to form a multilayer filter structure 31. The filter material 30 has an upper end portion 35 and a lower end portion 37, a central portion 36, and both side portions 38.

  In the multilayer filter structure 31 shown in FIG. 8, four filter members 30 having substantially flat surfaces are overlapped in the air flow direction (thickness direction). In the multilayer filter structure shown in FIG. 9, four filter members 30 that repeatedly undulate in a wave shape overlap in the air flow direction (thickness direction). The number of filter materials 30 overlapping in the air flow direction (thickness direction) is not particularly limited, and three or less filter materials 30 may form the multilayer filter structure 31, and five or more filter materials. 30 may form a multilayer filter structure 31.

  The honeycomb laminated filter 32 combines a sheet-like material made of at least one of ceramic fiber paper, glass fiber paper, flame retardant paper, activated carbon paper, nonwoven fabric, and felt with a corrugated material, and combines them. The stacked filters 32 have a predetermined thickness and a predetermined area. The honeycomb laminated filter 32 is installed on the downstream side (backward in the air flow direction) of the multilayer filter structure 31 and is separated from the multilayer filter structure 31 by a predetermined dimension in the rearward direction of the air flow. The honeycomb laminated filter 32 has an upper end portion 39 and a lower end portion 41, a central portion 40, and both side portions 42.

  The oily solution 33 takes in harmful substances (volatile organic compounds, paint mist) contained in the exhaust air a4 while keeping the entire area of the multilayer filter structure 31 (the entire area of the filter material 30) and the entire area of the honeycomb laminated filter 32 in a wet state. . Liquid petrolatum is used for the oily solution 33. The oily solution 33 flows from the upper end portion 35 of the multilayer filter structure 31 (filter material 30) through the central portion 36 toward the lower end portion 37, and passes through the central portion 40 from the upper end portion 39 of the honeycomb laminated filter 32. And flow toward the lower end 41.

  The supply means 34 is formed of a storage tank 43 (drain pan), a replenishment / replacement tank 44, a supply tank 45 (oil supply header), a circulation pump 46, and a strainer 47, and includes supply amount adjusting means. The storage tank 43 is stored in the housing 24 and is located below (directly below) the multilayer filter structure 31 and the honeycomb multilayer filter 32, and flows downward from the lower end portions 37 and 41 of the multilayer filter structure 31 and the honeycomb multilayer filter 32. Contains the oily solution 33 (liquid petrolatum). The replenishment / replacement tank 44 is installed outside the housing 24 and is used for replenishing the oily solution 33 and replacing the dirty oily solution 33. The storage tank 43 and the supply / replacement tank 44 are connected by a pipe 48 (metal pipe).

  The supply tank 45 is accommodated in the housing 24 and is located at the upper end portion 35 of the multilayer filter structure 31 and the upper end portion 39 of the honeycomb laminated filter 32. The supply tank 45 is opened to the entire upper end portion 39 extending between the first supply ports 49 extending between the both side portions 38 of the multilayer filter structure 31 and the both end portions 42 of the honeycomb laminated filter 32. And a second supply port 50. The supply tank 45 supplies the oily solution 33 (liquid petrolatum) from the first supply port 49 to the entire upper end portion 39 of the multilayer filter structure 31, and the oil supply from the second supply port 50 to the entire upper end portion 39 of the honeycomb multilayer filter 32. Solution 33 (liquid petrolatum) is supplied.

  The supply / replacement tank 44 and the supply tank 45 are connected by a pipe 51. The circulation pump 46 is installed in a pipeline 48 extending between the storage tank 43 and the replenishment / replacement tank 44, forcibly supplies the oil solution 33, and circulates the oil solution 33. The controller of the circulation pump 47 is connected to the controller 22. The strainer 47 is installed in a pipeline 51 extending between the replenishment / replacement tank 44 and the supply tank 45, and filters harmful substances collected in the oily solution 33.

  The supply amount adjusting means adjusts the supply amount of the oily solution 33 supplied to the multilayer filter structure 31 and the honeycomb laminated filter 32 by adjusting the output of the circulation pump 48. In the supply amount adjusting means, when the supply amount of the mixed air a4 supplied to the coating booth 11 is large, the supply amount of the oily solution 33 supplied to the multilayer filter structure 31 and the honeycomb laminated filter 32 is increased. 11 is reduced, the supply amount of the oily solution 33 supplied to the multilayer filter structure 31 and the honeycomb laminated filter 32 is reduced.

  The air supply mechanism 14 is formed of an air supply duct 52, an outside air intake duct 53, an air supply fan 54, a deodorizing device 55, an air conditioner 56, and first and second air filter units 57 and 58 (air filters). An amount adjusting means, an exhaust amount adjusting means, and an air supply amount adjusting means are provided. The air supply duct 52 is formed of a first air supply duct 52a extending in the vertical direction and a second air supply duct 52b extending in the front-rear direction. The first air supply duct 52 a is connected to the upper portion of the housing 24 and communicates with the housing 24. The upper part of the first air supply duct 52a has a discharge port 59 (gull) for discharging the mixed air a4 to the outside, and an air supply port 60 for supplying the mixed air a4 to the second air supply duct 52b. It is open.

  The second air supply duct 52 b is connected to the air supply port 60 of the first air supply duct 52 a and is located on the ceiling 17 of the painting booth 11 and extends between the rear wall 19 of the painting booth 11 and the entrance 21. . The second air supply duct 52 b is inclined downwardly from the rear wall 19 toward the entrance 21. The outside air intake duct 53 is connected to the lower portion of the housing 24 and extends rearward from the housing 24. The outside air intake duct 53 takes in outside air a <b> 3 and supplies the outside air a <b> 3 to the lower part of the housing 24.

  The air supply fan 54 is housed in the center of the housing 24 and is positioned above the multilayer filter structure 31 and the honeycomb laminated filter 32, and forcibly supplies mixed air a4 (clean air a2) to the coating booth 11. . The control unit of the air supply fan 54 is connected to the controller 22. The deodorizing device 55 is detachably or replaceably housed in the central portion of the housing 24, and removes odors contained in the mixed air a4 flowing through the housing 24.

  As the deodorizing device 55, a wet deodorizing device, an activated carbon deodorizing filter, or a constant temperature oxidation deodorizing device can be used. The constant temperature oxidation type deodorization apparatus is heated by a heater to a certain degree and decomposes odor with a catalytic filter. The wet deodorization apparatus and the constant temperature oxidation deodorization apparatus are connected to the controller 22. In the coating system 10, the deodorizing device 55 may not be installed. In this case, the mixed air a4 is not deodorized.

  The air conditioner 56 is installed in the second air supply duct 52b immediately before the first air supply duct 52a. The control unit of the air conditioner 56 is connected to the controller 22. The air conditioner 56 adjusts the temperature of the mixed air a4 supplied to the painting booth 11 and the humidity of the mixed air a4 supplied to the painting booth 11. In the painting system 10, the air conditioner 56 may not be installed. In this case, the temperature and humidity of the mixed air a4 are not adjusted.

  The first air filter unit 57 (air filter) is installed at the intake 61 of the outside air a3 of the outside air intake duct 53, and collects dust contained in the outside air a3. The second air filter unit 58 (air filter) is installed on the ceiling 17 of the painting booth 11, and collects dust contained in the mixed air a4. The second air filter unit 58 extends between the entrance 21 and the rear wall 19 of the painting booth 11 and hangs down from the ceiling 17 toward the floor 18 so as to draw an arc. As the first and second air filter units 57 and 58, a coarse filter, a medium / high performance filter, a HEPA filter, or a composite filter combining these filters can be used.

  Motor dampers 62 to 64 (MD) are used for the inflow amount adjusting means, the exhaust amount adjusting means, and the air supply amount adjusting means. The motor dampers 62 to 64 have their control units connected to the controller 22. The motor damper 62 forming the inflow amount adjusting means is installed in the outside air intake port 65 of the housing 24 inside the outside air intake duct 53, and adjusts the amount of air flowing through the air flow path with the swirl blades, thereby adjusting the housing. The inflow amount of the outside air a <b> 3 that flows into 24 is adjusted. The motor damper 63 forming the exhaust amount adjusting means is installed in the discharge port 59 of the air supply duct 52a inside the first air supply duct 52a, and adjusts the amount of air flowing through the air flow path by the swirling blades. Then, the exhaust amount of the mixed air a4 discharged to the outside is adjusted.

  The motor damper 64 forming the air supply amount adjusting means is installed in the air supply port 60 of the air supply duct 52a inside the first air supply duct 52a, and adjusts the amount of air flowing through the air flow path by the swirling blades. As a result, the air supply amount (inflow amount) of the mixed air a4 supplied to the second air supply duct 52b is adjusted. In the air supply duct 14, a part of the mixed air a4 is exhausted to the outside by the motor damper 63 (exhaust amount adjusting means), and the remaining mixed air a4 is supplied to the painting booth 11 by the motor damper 64 (air supply amount adjusting means). Air up.

  The controller 22 includes a room pressure sensor 25, a temperature sensor 26, a humidity sensor 27, a circulation pump 46, an air supply fan 54, a deodorization device 55 (wet deodorization device, constant temperature oxidation deodorization device), an air conditioner 56, and motor dampers 62 ~. 64 ON / OFF. The controller 22 compares the measurement chamber pressure of the painting booth 11 transmitted from the chamber pressure sensor 25 with the set chamber pressure of the painting booth 11, and performs feedback control so that the measurement chamber pressure falls within the set chamber pressure. .

  The controller 22 sends a swirl vane opening degree signal (an opening holding signal or an opening holding signal or The opening pressure change signal) is transmitted and the opening of the motor dampers 62 to 64 is adjusted to maintain the chamber pressure of the painting booth 11 at the set chamber pressure. The controller 22 keeps the chamber pressure of the painting booth 11 at a positive pressure by the motor damper 63 (exhaust amount adjusting means) and the motor damper 64 (air supply amount adjusting means).

  The controller 22 compares the measured temperature of the painting booth 11 transmitted from the temperature sensor 26 with the preset temperature of the painting booth 11 and performs feedback control so that the measured temperature falls within the set temperature range. The controller 22 transmits a temperature signal (a temperature holding signal or a temperature change signal) to the control unit of the air conditioner 56, and adjusts the temperature of the mixed air a4 supplied from the air conditioner 56, whereby the painting booth 11 is adjusted. Keep the temperature at the set temperature.

  The controller 22 compares the measured humidity of the painting booth 11 transmitted from the humidity sensor 27 with the preset humidity of the painting booth 11 and performs feedback control so that the measured humidity falls within the range of the set humidity. The controller 22 transmits a humidity signal (humidity retention signal or humidity change signal) to the control unit of the air conditioner 56, and adjusts the humidity of the mixed air a4 supplied from the air conditioner 56, whereby the painting booth 11 Keep the humidity at the set temperature and humidity.

  The controller 22 outputs the output of the air supply fan 54 stored in the storage device (the flow rate of the mixed air a4 flowing into the painting booth 11) and the output of the circulation pump 46 (the supply amount of the oily solution 33 supplied to the filters 31 and 32). ), The output of the circulation pump 46 is controlled in accordance with the set output of the air supply fan 54. The controller 22 transmits the output signal (output maintaining signal or output change signal) of the circulation pump 46 confirmed by the correlation to the control unit of the circulation pump 46, and the output of the circulation pump 46 in accordance with the set output of the supply fan 54. Adjust.

  FIG. 11 is a side view of the coating system 10 showing the inside of the painting booth 11 in an operating state, and FIG. 12 is a perspective view of the multilayer filter structure 31 showing the flow of the oily solution 33. FIG. 13 is a perspective view of another example of the multilayer filter structure 31 showing the flow of the oily solution 33, and FIG. 14 is a perspective view of the honeycomb laminated filter 32 showing the flow of the oily solution 33. In FIG. 11, the flow of the exhaust air a1, the clean air a2, the outside air a3, and the mixed air a4 is indicated by arrows L1 to L4, and the flow of the oily solution 33 is indicated by arrows L5 and L6.

  When performing the painting work in the painting booth 11, the operator turns on the switch of the controller 22. When the switch of the controller 22 is turned on, a menu screen (not shown) is displayed on the display connected to the controller 22. On the menu screen, a condition display area, a condition input button, a system operation button, and an OFF button are displayed. When the OFF button is clicked (tapped), the system 10 stops.

  The condition display area includes a set room pressure display area that displays the set room pressure of the paint booth 11, a set humidity display area that displays the set humidity of the paint booth 11, a set temperature display area that displays the set temperature of the paint booth 11, A setting output display area that displays the setting output of the air supply fan 54, an air supply ratio display area that displays the air supply ratio of the mixed air a4, and an exhaust ratio display area that displays the exhaust ratio of the mixed air a4 are displayed.

  To enter or change conditions, click the condition input button on the menu screen. When the condition input button is clicked, a condition input screen (not shown) is displayed on the display. The condition input screen displays a room pressure input area, a humidity input area, a temperature input area, an output input area, an air supply ratio input area, an exhaust ratio input area, a setting button, a clear button, and a cancel button. Clicking the clear button clears the conditions entered in each input area and re-enters the conditions in each input area. Note that when a condition is input to one of the air supply ratio input area and the exhaust ratio input area, the other condition is automatically determined. Click the cancel button to return to the menu screen. When a setting button is clicked after inputting a condition in each input area, the controller 22 stores the condition input in each input area in the storage device, and then displays a menu screen on the display.

  After entering or changing each condition, click the system operation button on the menu screen. When the system operation button is clicked, the controller 22 transmits a setting output signal of the air supply fan 54 to the control unit while transmitting an ON signal to the control unit of the air supply fan 54. The control unit of the air supply fan 54 operates the air supply fan 54 with the set output while starting the air supply fan 54. The controller 22 transmits a set temperature signal and a set humidity signal of the air conditioner 56 to the control unit while transmitting an ON signal to the control unit of the air conditioner 56. The control unit of the air conditioner 56 operates the air conditioner 56 at the set temperature and the set humidity while starting the air conditioner 56.

  The controller 22 determines (indexes) the output of the circulation pump 46 with respect to the output (set output) of the supply fan 54 while taking into account the correlation between the output of the supply fan 54 and the output of the circulation pump 46. While transmitting an ON signal to the control unit 46, the output signal of the circulation pump 46 is transmitted to the control unit. The controller of the circulation pump 46 operates the circulation pump 46 with the output transmitted from the controller 22 while starting the circulation pump 46.

  The controller 22 transmits an ON signal to the deodorizing device 55 (wet deodorizing device, constant temperature oxidation deodorizing device). By receiving an ON signal from the controller 22, the deodorizing device 55 is activated. The controller 22 transmits an ON signal to the room pressure sensor 25, the temperature sensor 26, and the humidity sensor 27. The chamber pressure sensor 25 that has received the ON signal from the controller 22 starts measuring the chamber pressure in the painting booth 11 and transmits the measured measurement chamber pressure to the controller 22. The temperature sensor 26 that has received the ON signal from the controller 22 starts measuring the temperature of the coating booth 11 and transmits the measured temperature to the controller 22. The humidity sensor 27 that has received the ON signal from the controller 22 starts measuring the humidity of the painting booth 11 and transmits the measured measured humidity to the controller 22.

  The controller 22 determines the opening degree of the swirl vanes of the motor damper 62 and the motor damper 63 corresponding to the exhaust ratio of the mixed air a4, and transmits an opening degree signal to the control units of the motor dampers 62 and 63. The control units of the motor damper 62 and the motor damper 63 adjust the opening degree of the swirl vanes of the motor dampers 62 and 63 to that of the opening signal according to the opening signal. The controller 22 determines the opening degree of the swirl vane of the motor damper 64 corresponding to the air supply ratio of the mixed air a4, and transmits an opening degree signal to the control unit of the motor damper 64. The control unit of the motor damper 64 adjusts the opening degree of the rotating blades of the motor damper 64 to that of the opening signal according to the opening signal.

  The coating booth 11 is forcibly supplied with the mixed air a <b> 4 from the ceiling 17 by the air supply fan 54. An operator uses a painting facility in the painting booth 11 and performs a painting operation to apply an oil-based paint or a water-based paint to the painted surface of the automobile 66. During the painting work in the painting booth 11, volatile organic compounds (VOC) contained in the oil paint are scattered, and paint mist of the oil paint and “water paint” is scattered, and these harmful substances are mixed in the mixed air a4. The The exhaust air a1 (mixed air a4) containing harmful substances flows into the recovery duct 29 under the floor 28 through the air recovery port provided in the floor 18, as indicated by the arrow L1 in FIG. Through the bottom of the housing 24.

  When the circulation pump 46 is activated, the oil solution 33 is forcibly circulated by the circulation pump 46 (supply means 34), and the oil solution 33 is supplied to the multilayer filter structure 31 from the first supply port 49 of the supply tank 45. The oily solution 33 is supplied to the honeycomb laminated filter 32 from the second supply port 50 of the tank 45.

  The oily solution 33 is supplied to the entire upper end portion 35 extending between both side portions 38 of the rearmost filter member 30 located in the air flow direction rearward (thickness rearward) of the multilayer filter structure 31. The oily solution 33 is infiltrated from the entire upper end portion 35 of the last filter member 30 toward the filter member 30 located in front of the air flow direction (front in the thickness direction), as indicated by an arrow L5 in FIGS. In addition, the multilayer filter structure 31 (the filter material 30) flows from the upper end portion 35 to the central portion 36 and flows from the central portion 36 toward the lower end portion 37. The entire area of the multilayer filter structure 31 (the entire area of the filter material 30) is kept wet by the oily solution 33. The oily solution 33 that has flowed through the multilayer filter structure 31 (the filter material 30) flows downward (drops) from the lower end portion 37 of the multilayer filter structure 31 and is stored in the storage tank 43.

  Further, the oily solution 33 is supplied to the entire upper end portion 39 extending between the both side portions 42 of the honeycomb laminated filter 32. The oil solution 33 flows from the entire upper end portion 39 of the honeycomb laminated filter 32 to the central portion 40 and flows from the central portion 40 toward the lower end portion 41 as indicated by an arrow L6 in FIG. The entire area of the honeycomb laminated filter 32 is kept wet by the oily solution 33. The oily solution 33 flowing through the honeycomb laminated filter 32 flows out (falls) downward from the lower end portion 41 of the honeycomb laminated filter 32 and is accommodated in the accommodating tank 43.

  The exhaust air a1 that has flowed into the lower portion of the housing 24 through the recovery duct 29 flows through the multilayer filter structure 31 (filter material 30) in a wet state by the oily solution 33. When the exhaust air a1 flows through the multilayer filter structure 31 (filter material 30), volatile organic compounds among the harmful substances contained in the exhaust air a1 are dissolved in the oily solution 33, and coating of the harmful substances is performed. Mist adheres (adsorbs) to the oily solution 33, harmful substances are collected in the oily solution 33, and clean air a2 is generated as indicated by an arrow L2 in FIG.

  Even if harmful substances remain in the clean air a2 flowing through the multilayer filter structure 31 (filter material 30), the clean air a2 (exhaust air a1) is wet by the oily solution 33. 32 flows. When the clean air a2 (exhaust air a1) containing harmful substances flows through the honeycomb laminated filter 32, volatile organic compounds among the harmful substances contained in the clean air a2 are dissolved in the oily solution 33, and Among them, the coating mist adheres (adsorbs) to the oily solution 33, and harmful substances are collected in the oily solution 33. As the clean air a2 (exhaust air a1) flows through the honeycomb laminated filter 32, as shown by an arrow L2 in FIG. 11, clean air a2 from which harmful substances have been removed is generated.

  The coating system 10 causes the exhaust air a1 to flow through the multilayer filter structure 31 (filter material 30) in a wet state by the oily solution 33, and dissolves volatile organic compounds among harmful substances in the oily solution 33. By adhering (adsorbing) the coating mist of the substance to the oily solution 33, the volatile organic compound or the coating mist can be collected in the oily solution 33. When applying the oily paint or the water-based paint to the automobile 66, In addition to removing harmful substances from the volatile organic compound and paint mist generated from the exhaust air a1, it is possible to generate clean air a2 from which the volatile organic compound and paint mist have been removed from the exhaust air a1.

  The coating system 10 is installed on the downstream side of the multilayer filter structure 31 even if harmful substances such as volatile organic compounds and coating mist pass through the multilayer filter structure 31 and the harmful substances remain in the clean air a2. The toxic substance can be collected in the oily solution 33 flowing through the entire honeycomb laminated filter 32, and the toxic substance is removed from the clean air a2 (exhaust air a1) where the toxic substance remains by using the honeycomb laminated filter 32. Can be removed.

  The flow rate of the exhaust air a1 in the multilayer filter structure 31 is gradually slowed by the air resistance of the filter material 30, and the flow rate of the exhaust air a1 in the filter material 30 located in front of the air flow direction is high. Although the flow speed of the exhaust air a1 in the filter material 30 located rearward in the flow direction is slow, the entire upper end portion 35 of the rearmost filter material 30 located rearward in the air flow direction of the multilayer filter structure 31 The oil solution 33 is supplied to the filter material 30 and the oil solution 33 is infiltrated from the rearmost filter material 30 toward the filter material 30 positioned forward in the air flow direction. Even if the flow rate of the oily solution 33 becomes slow and the exhaust air a1 quickly flows through the filter material 30 located in front of the air flow direction, the exhaust air a The contact time with respect to the molecules of the oily solution 33 can be increased, and harmful substances contained in the exhaust air a1 can be collected in the oily solution 33, and contained in the exhaust air a1 using the multilayer filter structure 31. Can be removed reliably.

  The oily solution 33 that collects harmful substances contained in the exhaust air a1 and is stored in the storage tank 43 is forced to flow through the conduit 48 by the circulation pump 46, and is supplied from the storage tank 43 through the conduit 48. After flowing into the replacement tank 44, it flows into the strainer 47 through the conduit 51. In the strainer 47, harmful substances collected in the oily solution 33 are filtered. The oily solution 33 from which harmful substances have been filtered by the strainer 47 flows into the supply tank 45 through the conduit 51 and is supplied again from the supply tank 45 to the upper end portions 35 and 39 of the multilayer filter structure 31 and the honeycomb laminated filter 32. Is done.

  In the coating system 10, the harmful substance collected in the oily solution 33 is filtered by the strainer 47, the oily solution 33 is not saturated with the harmful substance, and the oily solution 33 in which the harmful substance is filtered is multi-layered by the circulation pump 46. Since it is supplied to the filter structure 31 (filter material 30) and the honeycomb laminated filter 32, the harmful oil contained in the exhaust air a1 is surely collected using the new oily solution 33 in which the harmful substances are filtered. Thus, harmful substances such as volatile organic compounds and paint mist can be reliably removed from the exhaust air a1.

  The motor damper 62 installed in the outside air intake duct 53 has the opening degree of the swirl vane corresponding to the opening degree signal transmitted from the controller 22, and the outside air a3 flows through the first air filter unit 57. However, as indicated by an arrow L3 in FIG. 11, a predetermined proportion of the outside air a3 flows into the lower portion of the housing 24 through the air flow path of the motor damper 62. As the outside air a3 flows through the first air filter unit 57, dust contained in the outside air a3 is collected in the first air filter unit 57. In the lower part of the housing 24, the clean air a2 generated by the multilayer filter structure 31 and the honeycomb laminated filter 32 and the outside air a3 passing through the motor damper 62 are mixed to generate a mixed air a4.

  The mixed air a <b> 4 flows into the deodorizing device 55 through the air supply fan 54. In the deodorizing device 55, the odor contained in the mixed air a4 is removed. The mixed air a4 from which the odor has been removed flows from the deodorizing device 55 into the first air supply duct 52a. The motor damper 63 installed inside the first air supply duct 52 a has the opening degree of the swirl vane that corresponds to the opening degree signal transmitted from the controller 22, and a predetermined ratio of the mixed air a4 is the motor damper 63. The air is exhausted from the discharge port 59 through the air flow path.

  Further, the motor damper 64 installed in the first air supply duct 52a has the opening degree of the swirl vane as the opening degree signal transmitted from the controller 22, and a predetermined ratio of the mixed air a4 is the motor. The air flows into the second air supply duct 52b from the air supply port 60 through the air flow path of the damper 64. A part of the mixed air a4 flowing into the second air supply duct 52b flows into the air conditioner 56, and the mixed air a4 whose humidity and temperature are adjusted by the air conditioner 56 is supplied from the air conditioner 56 to the second supply air. It flows into the air duct 52b.

  The mixed air a4 is supplied to the painting booth 11 from the ceiling 17 of the painting booth 11 through the second air filter unit 58 as indicated by an arrow L4 in FIG. The mixed air a4 flows through the second air filter unit 58, whereby dust contained in the mixed air a4 is collected in the second air filter unit 58. The coating system 10 uses the air filter units 57 and 58 to remove the dust contained in the outside air a3 and the mixed air a4, and therefore supplies the mixed air a4 from which the dust has been removed to the coating booth 11. The painting operation can be performed in a comfortable environment filled with the mixed air a4 from which dust is removed.

  A predetermined ratio of the mixed air a4 is exhausted to the outside by the motor damper 63 (exhaust amount adjusting means) and the motor damper 64 (air supply amount adjusting means), and a larger proportion of the mixed air a4 is coated than the mixed air a4 exhausted to the outside. Air is supplied to the painting booth 11 from the ceiling 17 of the booth 11. The ratio of the mixed air a4 exhausted to the outside is in the range of 10 to 35% when the entire mixed air a4 is 100%, and the ratio of the mixed air a4 supplied to the coating booth 11 is mixed. When the entire air a4 is 100%, it is in the range of 65 to 90%.

  The room pressure sensor 25 transmits the measured measurement room pressure of the painting booth 11 to the controller 22. The controller 22 compares the measurement chamber pressure of the painting booth 11 transmitted from the chamber pressure sensor 25 with the preset chamber pressure of the painting booth 11 so that the measurement chamber pressure falls within the range of the setting chamber pressure. An opening degree signal (an opening degree holding signal or an opening degree changing signal) is transmitted to the control units of the motor damper 63 (exhaust air amount adjusting means) and the motor damper 64 (air supply amount adjusting means). The motor damper 63 and the control unit of the motor damper 64 adjust the opening degree of the swirl blade according to the opening degree signal transmitted from the controller 22. The chamber pressure of the painting booth 11 is maintained at a positive pressure by a motor damper 63 (exhaust amount adjusting means) and a motor damper 64 (air supply amount adjusting means).

  When the chamber pressure of the painting booth 11 becomes negative pressure, the exhaust air a1 containing harmful substances flows backward from the recovery mechanism 12 to the painting booth 11, and the painting booth 11 is contaminated and clean air a2 cannot be generated. In the coating system 10, the chamber pressure of the coating booth 11 is maintained at a positive pressure, so that the exhaust air a <b> 1 can be reliably recovered by the recovery mechanism 12, and the exhaust air a <b> 1 can flow into the air cleaning mechanism 13, Clean air a2 (mixed air a4) from which harmful substances have been removed can be supplied to the painting booth 11.

  The temperature sensor 26 transmits the measured temperature of the coating booth 11 to the controller 22. The controller 22 compares the measured temperature of the painting booth 11 transmitted from the temperature sensor 26 with the preset temperature of the painting booth 11 so that the measured temperature falls within the set temperature range. A temperature signal (temperature holding signal or temperature change signal) is transmitted to the control unit. The control unit of the air conditioner 56 controls the air conditioning function according to the temperature signal transmitted from the controller 22, and supplies the mixed air a4 adjusted to the set temperature to the second air supply duct 52b. The coating system 10 can create a favorable temperature environment in the painting booth 11 by adjusting the temperature inside the painting booth 11 with the air conditioner 56, and can perform painting work in a comfortable environment.

  The humidity sensor 27 transmits the measured humidity of the painting booth 11 to the controller 22. The controller 22 compares the measured humidity of the painting booth 11 transmitted from the humidity sensor 27 with the preset humidity of the painting booth 11 so that the measured humidity falls within the range of the set humidity. A humidity signal (humidity retention signal or humidity change signal) is transmitted to the control unit. The control unit of the air conditioner 56 controls the air conditioning function according to the humidity signal transmitted from the controller 22, and supplies the mixed air a4 adjusted to the set humidity to the second air supply duct 52b.

  In the coating system 10, for example, when applying a water-based paint to the automobile 66 (object to be coated) in the paint booth 11, drying of the water-based paint is delayed if the humidity inside the paint booth 11 is high. By reducing the humidity inside the booth 11, drying of the water-based paint can be accelerated, and the efficiency of the painting work can be improved. In the coating system 10, if the humidity inside the painting booth 11 is lower than necessary, the water-based paint dries early and the leveling of the painting surface decreases, but the air conditioner 56 increases the humidity inside the painting booth 11. Thus, the early drying of the water-based paint can be prevented, the leveling of the painted surface can be prevented from being lowered, and an increase in painting failure can be prevented.

  In the coating system 10, harmful substances and dust are removed, and a mixed air a <b> 4 whose temperature and humidity are adjusted is supplied to the coating booth 11. During the operation of the system 10, painting work is performed in the painting booth 11, and harmful substances are mixed into the mixed air a4. The exhaust air a1 (mixed air a4) containing harmful substances is collected in the recovery duct 29 → multilayer filter structure. The mixed air is circulated in the order of the product 31 → the honeycomb laminated filter 32 → the first air supply duct 52a → the second air supply duct 52b → the painting booth 11 to remove harmful substances and dust, and the temperature and humidity are adjusted. a4 is constantly supplied to the painting booth 11.

  The painting system 10 can supply clean air a2 from which harmful substances have been removed from the exhaust air a1 to the painting booth 11, and an operator working in the painting booth 11 does not inhale volatile organic compounds or painting mist. It is possible to carry out the painting work in a good environment without harming the health of the worker.

DESCRIPTION OF SYMBOLS 10 Coating system 11 Painting booth 12 Recovery mechanism 13 Air cleaning mechanism 14 Air supply mechanism 15 Panel 16 Side wall 17 Ceiling 18 Floor 19 Rear wall 20 Door 21 Entrance / exit 22 Controller 23 Lighting fixture 24 Housing 25 Room pressure sensor 26 Temperature sensor 27 Humidity sensor 28 Underfloor 29 Collection duct 30 Filter material 31 Multi-layer filter structure 32 Honeycomb laminated filter 33 Oil solution 34 Supply means 35 Upper end portion 36 Central portion 37 Lower end portion 38 Side portion 39 Upper end portion 40 Central portion 41 Lower end portion 42 Side portion 43 Storage tank 44 Supply and replacement tank 45 Supply tank 46 Circulation pump 47 Strainer 48 Pipe line 49 First supply port 50 Second supply port 51 Pipe line 52 Air supply duct 52a First air supply duct 52b Second air supply duct 53 Outside air intake duct 54 Supply Ki 55 deodorizer 56 air conditioner 57 the first air filter unit 58 second air filter unit 59 outlet 60 air supply opening 61 inlet 62 motor damper (inflow amount regulating means)
63 Motor damper (displacement adjustment means)
64 Motor damper (air supply adjustment means)
65 Outside air intake 66 Automobile (object to be painted)
a1 Exhaust air a2 Clean air a3 Outside air a4 Mixed air

Claims (11)

A coating booth having a predetermined volume for applying paint to the object to be coated, a recovery mechanism for recovering exhaust air containing harmful substances composed of at least volatile organic compounds of volatile organic compounds and coating mist from the coating booth, and the recovery An air cleaning mechanism that collects harmful substances from the exhaust air collected by the mechanism to generate clean air, and a mixed air obtained by mixing clean air generated by the air cleaning mechanism and outside air is supplied to the coating booth. An air supply mechanism, wherein the air supply mechanism exhausts a part of the mixed air and supplies the remaining mixed air to the paint booth.
A porous filter material made of synthetic fiber and having a predetermined thickness and a predetermined area; an oily solution that is supplied to the filter material and maintains the entire region of the filter material in a wet state; and the oily solution. Supply means for supplying the filter material to the filter material, and the coating system allows the exhaust air to flow through the filter material in a wet state by the oily solution, and the harmful substance contained in the exhaust air is removed from the oily material. A coating system characterized by being collected in a solution.   The air cleaning mechanism forms a multilayer filter structure in which a plurality of the filter materials are arranged in the air flow direction in a state where the surfaces of the filter materials are overlapped, and the supply means includes an air flow in the multilayer filter structure. Supplying the oily solution to the upper end of the rearmost filter material located in the rear of the direction, while the oily solution is infiltrating from the rearmost filter material toward the filter material located in front of the air flow direction, The coating system according to claim 1, wherein the filter material flows from the upper end portion to the lower end portion of the filter material and flows downward from the lower end portion of the filter material.   The air cleaning mechanism includes a honeycomb laminated filter that is installed downstream of the multilayer filter structure and has a predetermined thickness and a predetermined area, and the supply means supplies the oily solution to an upper end portion of the honeycomb laminated filter. The entire area of the honeycomb multilayer filter is kept wet, and the oily solution flows from the upper end to the lower end of the honeycomb multilayer filter and flows downward from the lower end of the honeycomb multilayer filter. The coating system according to claim 2, wherein the system causes the exhaust air to flow through a honeycomb laminated filter wet with the oil solution, and collects the harmful substances contained in the exhaust air in the oil solution.   A storage tank that is located below the multilayer filter structure and the honeycomb multilayer filter and that stores the multilayer filter structure and an oily solution that has flowed downward from the honeycomb multilayer filter; and the storage tank A circulating pump that supplies the oily solution contained in the filter material to the upper end of the filter material and the upper end of the honeycomb laminated filter, and a strainer that filters harmful substances collected in the oily solution. The oily solution is caused to flow from the upper end portion to the lower end portion of the filter material while circulating the solution, and the oily solution is caused to flow from the upper end portion to the lower end portion of the honeycomb laminated filter. Painting system.   The air cleaning mechanism includes supply amount adjusting means for adjusting the supply amount of an oily solution supplied to the multilayer filter structure and the honeycomb laminated filter, and the supply amount adjusting means supplies the coating booth with air. When the air supply amount is large, the supply amount of the oil solution supplied to the multilayer filter structure and the honeycomb laminated filter is increased, and when the air supply amount of the mixed air supplied to the coating booth is small, The coating system according to claim 4, wherein a supply amount of the oil-based solution supplied to the multilayer filter structure and the honeycomb multilayer filter is reduced.   The coating system according to any one of claims 1 to 5, wherein the air supply mechanism includes a deodorizing device that removes odor contained in the mixed air.   The coating system according to any one of claims 1 to 6, wherein the air supply mechanism includes an air conditioner that adjusts at least one of temperature and humidity of the mixed air.   The air supply mechanism forcibly supplies the mixed air, an inflow amount adjusting means for adjusting the inflow amount of the outside air, and an exhaust amount adjustment for adjusting the exhaust amount of the mixed air to the outside And an air supply amount adjusting means for adjusting an air supply amount of the mixed air to the painting booth, and the exhaust air amount adjusting means and the air supply amount adjusting means let the mixed air at a predetermined ratio to the outside. The exhaust air is supplied from the ceiling of the painting booth with a larger proportion of the mixed air exhausted to the outside, and the recovery mechanism causes the exhaust air to flow under the floor of the painting booth. The coating system according to any one of claims 1 to 7, wherein air is allowed to flow into the air cleaning mechanism from under the floor.   The coating system according to claim 8, wherein the air supply mechanism maintains a chamber pressure of the coating booth at a positive pressure by the exhaust amount adjusting means and the air supply amount adjusting means.   The air supply mechanism is installed at the outside air intake to collect dust contained in the outside air, and the air filter is installed at the ceiling of the painting booth to collect dust contained in the mixed air. The coating system according to claim 1, comprising a filter. The coating system according to any one of claims 1 to 10, wherein the oily solution is liquid petrolatum.

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