Prefilter device provided in exhaust apparatus for coating booth, and exhaust apparatus with the prefilter device

Abstract

To solve the problem with an exhaust filter of an exhaust apparatus provided in a coating booth, in prior art, that although a prefilter is provided upstream of the exhaust filter because the maintenance frequency is high, the burden of exchange on an operator is heavy.SOLUTION: A prefilter device provided in an exhaust apparatus for a coating booth is constituted of: a prefilter; and a prefilter support part which is provided so as to allow the prefilter to be inserted from the outside of an exhaust box of the exhaust apparatus for the coating booth, which filters air in the coating booth, exhausts the filtered air out of the coating booth, and has an exhaust filter, and so to allow the prefilter to pass downstream of the exhaust filter in the coating booth and to be pulled out from the exhaust box.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a prefilter device provided in an exhaust system for a paint booth of a vehicle or the like, and to an exhaust system having this prefilter device. [Background technology]

[0002] FIG. 9 shows a paint booth in which vehicles and the like are painted, where 1 indicates a paint drying booth in which vehicles and the like are painted and dried, 2 indicates an intake device provided in the paint drying booth 1, and 3 indicates an exhaust device provided in the paint drying booth 1.

[0003] The intake device 2 comprises an intake box 5 having an intake filter 4, and an intake duct 7 connected to the intake box 5 via an intake fan device 6. The outside air introduced into the intake box 5 through the intake filter 4 is supplied from the intake duct 7 into the ceiling 1a of the paint booth 1, and then through a ceiling filter 8 provided on the ceiling 1a, to be supplied into the paint drying space 1b of the booth 1.

[0004] 9 and 10, the exhaust device 3 comprises an exhaust box 9 for introducing air contaminated by paint (paint mist) from within the paint drying booth 1, and an exhaust duct 10 connected to the exhaust box 9. Inside the exhaust box 9, there are an exhaust filter 11 for filtering (cleaning) the paint mist from the booth 1, which is provided so as to block the flow path, and an exhaust fan device 12 provided downstream of the exhaust filter 11.

[0005] The exhaust device 3 is, for example, installed on the ground, and configured so that the air inside the booth 1 (paint drying space 1b) is introduced from below the exhaust box 9 through an exhaust pit 13 formed by digging into the ground, and the paint mist inside the booth 1 passes through the exhaust filter 11 and is purified, and the purified air is discharged to the outside through the exhaust duct 10.

[0006] The exhaust filter 11 is formed in a sheet shape and is arranged within the exhaust box 9 in a zigzag shape, such as an M shape, from one side wall 9a to the other side wall 9b in order to increase the surface area.

[0007] For example, Patent Document 1 discloses a painting booth. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] JP-A-7-256167, FIG. 2 Summary of the Invention [Problem to be solved by the invention]

[0009] The water-based paints and solvent-based paints used in the paint drying booth 1 are sticky, so that the exhaust filter 11 of the exhaust device 3 is easily clogged, and frequent maintenance is a burden for the workers.

[0010] For this reason, an easily replaceable filter (pre-filter) is provided upstream (before the flow path) of the exhaust filter 11. The pre-filter can reduce the frequency with which the exhaust filter 11 needs to be replaced.

[0011] However, when replacing the prefilter, it is necessary to directly touch the dirty prefilter, and the structure of the exhaust system requires the worker to enter the system in order to replace it, which places a heavy burden on the worker.

[0012] The present invention allows for easy replacement of the pre-filter. [Means for solving the problem]

[0013] The prefilter device provided in the exhaust system for a paint booth of the present invention is characterized in that it comprises a prefilter and a prefilter support part that is inserted from the outside of an exhaust box of the exhaust system for a paint booth having an exhaust filter that filters the air in the paint booth and exhausts it to the outside of the paint booth, passes through the downstream side of the exhaust filter within the paint booth, and is arranged so as to be pulled out to the outside of the exhaust box.

[0014] The prefilter support portion is further characterized in that it comprises a one-end prefilter support portion provided on one end side of the exhaust box for rotatably supporting the base side of the prefilter wound into a roll, an other-end prefilter support portion provided on the other end side for rotatably supporting the tip portion of the prefilter in the winding direction, a means for winding up the tip portion, and a prefilter guide formed within the exhaust box for guiding the prefilter passing through the inside.

[0015] The pre-filter guide is characterized in that it comprises an inlet portion formed by penetrating one side wall of the exhaust box, an outlet portion formed by penetrating the other side wall, and a support portion provided in the exhaust box for bending and positioning the pre-filter inserted in the exhaust box.

[0016] The outlet portion has a shutter portion that can move up and down to close the opening of the outlet portion from above toward below, and the shutter portion is always positioned downward to close the outlet portion, and is formed so that when a prefilter passing through the outlet portion rises, it is positioned upward as the prefilter rises.

[0017] The exhaust system for a paint booth of the present invention is characterized in that it comprises an exhaust box of the exhaust system for a paint booth having an exhaust filter that filters the air inside the paint booth and exhausts it outside the paint booth, a prefilter, and a prefilter support part that is inserted from the outside of the exhaust box, passes through the downstream side of the exhaust filter inside the paint booth, and is arranged to pull the prefilter out of the exhaust box. Effect of the Invention

[0018] The present invention allows for easy replacement of the pre-filter.

[0019] In addition, since the worker does not need to enter the exhaust system, exposure to paint mist can be prevented. [Brief description of the drawings]

[0020] [Figure 1] FIG. 2 is a cross-sectional view for explaining a prefilter device provided in the exhaust system for a paint booth of the present invention. [Diagram 2] FIG. 2 is an explanatory plan view of a prefilter device provided in the exhaust system for a paint booth of the present invention. [Diagram 3] 4 is a front view for explaining a support portion on the other end side of a prefilter device provided in the exhaust system for a paint booth of the present invention. FIG. [Figure 4] FIG. 2 is a front view for explaining a prefilter device provided in the exhaust system for a paint booth according to the present invention. [Diagram 5] FIG. 2 is an explanatory view of the inside of an exhaust duct of a prefilter device provided in the exhaust system for a paint booth of the present invention. [Figure 6] FIG. 2 is an explanatory diagram of a shutter plate of a prefilter device provided in the exhaust system for a paint booth of the present invention. [Figure 7] FIG. 4 is an explanatory diagram showing a state in which the shutter plate of the prefilter device provided in the exhaust system for a paint booth of the present invention is closed. [Figure 8] FIG. 4 is an explanatory diagram showing a state in which the shutter plate of the prefilter device provided in the exhaust system for a paint booth of the present invention is open. [Figure 9] FIG. 1 is an overall view of a paint booth. [Figure 10] FIG. 1 is a cross-sectional view for explaining a conventional exhaust system for a paint booth. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0022] In addition, the same parts as those in the conventional explanation are given the same reference numerals and the explanation thereof will be omitted. EXAMPLES

[0023] (1. General Description of the Prefilter Device of the Present Application)

[0024] The prefilter device provided in the exhaust system for a paint booth of the present invention, as shown in Figures 1 to 4, comprises a prefilter 14 that filters paint mist and is inserted into the exhaust box 9 from the outside by a prefilter support part, passes through the upstream side (the front side with respect to the flow path) of the exhaust filter 11, and is pulled out to the outside of the exhaust box.

[0025] The prefilter support portion is composed of a one-end prefilter support portion 16 which is provided at one end side of the exhaust box 9 and rotatably supports a one-end core material 15 formed by winding the base side of the prefilter 14 into a roll, an other-end prefilter support portion 18 which is provided at the other end and rotatably supports an other-end core material 17 to which the tip of the prefilter 14 is attached and which winds up the prefilter portion after use, and a prefilter guide 19 which is formed inside the exhaust box 9 and guides the prefilter 14 as it passes through it.

[0026] (1.1. Pre-filter Guide 19 Explanation)

[0027] The prefilter guide 19 comprises, for example, an inlet portion 20 having a horizontally long rectangular slit shape formed by penetrating downward through one side wall 9a of the exhaust box 9, an outlet portion 21 having a horizontally long rectangular slit shape formed by penetrating downward through the other side wall 9b, and a guide portion 22 formed inside, and the prefilter 14 passes through the exhaust box 9 via the inlet portion 20, guide portion 22, and outlet portion 21.

[0028] In addition, the guide portion 22 is formed so that the pre-filter 14 passing through the exhaust box 9 is arranged by being folded, for example, in a zigzag shape, such as an M shape, in the same manner as the exhaust filter 11 which is folded, for example, in an M shape.

[0029] For example, the guide portion 22 consists of an upper support portion 22a located at the top, a lower support portion 22b located below, and an upper support portion 22c located at the top, each of which is made of a horizontal rod body and is spaced a desired distance apart from the entrance portion 20 toward the exit portion 21, and the entrance portion 20, upper support portion 22a, lower support portion 22b, upper support portion 22c, and the exit portion 21 arrange the prefilter 14 in an M shape.

[0030] The upper position refers to a position higher than the lower position, and the lower position is, for example, a position at the height of the inlet portion 20 and the outlet portion 21.

[0031] There is no particular restriction on the height of each of the support parts, so long as the prefilter 14 passing through the inside is arranged in a bent state.

[0032] (1.2. Description of the outlet section 21)

[0033] As shown in Figure 6, the outlet portion 21 is shaped like a slit that is wide in the vertical direction, and a shutter plate (shutter portion) 23 that can move up and down is provided to cover the opening from top to bottom.The height of the outlet portion 21 is made lower than the position of the other-end side core material 17 supported by the support portion 18, and the prefilter 14 from the outlet portion 21 is wound up from above the other-end side core material 17.

[0034] In addition, a rotating roller 23a may be provided at the lower end of the shutter plate 23 to smooth the movement of the prefilter 14 passing through the outlet portion 21 and to reduce frictional resistance to prevent damage to the prefilter 14.

[0035] By configuring in this manner, the core materials 15, 17 are fixed to the supports 16, 17 by a locking mechanism so as not to rotate, and the pre-filter 14 is allowed to sag slightly, so that the shutter plate 23 descends under its own weight, as shown in Figures 6 and 7, and the pre-filter 14 is sandwiched between the lower edge of the outlet portion 21 and the shutter plate 23, thereby blocking the outlet portion 21.

[0036] This prevents air from being sucked in through the outlet portion 21, preventing a decrease in exhaust efficiency, and also gives an angle to the pre-filter 14 that is bent at the lower edge, thereby making it possible to increase the area inside the exhaust box 9.

[0037] For example, the angle at which the pre-filter 14 is bent at its lower edge is 61 degrees in the case shown in FIG.

[0038] The shutter plate 23 may be moved downward by a biasing means such as a spring, in addition to its own weight when a weight such as a roller is added.

[0039] Furthermore, when the locking mechanism is released and the other end side core materials 15, 17 are rotated to wind up the prefilter 14, as shown in Figures 6 and 8, the prefilter 14 is lifted upward, which causes the shutter plate 23 to rise, the outlet portion 21 to open, and the prefilter 14 passes through the upper edge portion of the outlet portion 21. Therefore, the angle at which the prefilter 14 bends at the upper edge is mitigated, making it easier to wind up.

[0040] For example, the angle at which the pre-filter 14 is bent at the upper edge is 74 degrees in the case shown in FIG.

[0041] In order not to reduce exhaust efficiency, it is preferable that the opening of the inlet portion 20 is approximately the same as or slightly larger than the width and thickness of the prefilter 14.

[0042] (1.3. Description of the core material) The cores 15 and 17 are formed of, for example, rod-shaped cardboard. In addition, for example, the one end side core 15 may be omitted when the support portion 16 supports the roll-shaped prefilter 14.

[0043] Moreover, the one-end side core material 15 from which the prefilter has run out may be used as the other-end side core material 17. Moreover, the other-end side core material 17 around which the used prefilter 14 has been wound may be disposed of as is.

[0044] (1.4. Description of the handle)

[0045] In addition, a means for winding up the tip of the prefilter 14, such as a handle 24 for rotating the core material, can be fixed to the core material 17 on the other end side, and the prefilter 14 can be wound up around the core material 17 by rotating the handle 24.

[0046] The handle 24 allows the prefilter 14 to be wound up and removed from the support 18 without getting the hands dirty.

[0047] In addition to the handle 24, or without using the handle 24, an automatic rotating device may be provided that rotates the core 17 electrically or the like, and the prefilter 14 may be wound up.

[0048] As a locking mechanism for preventing the other end side core material 17 from rotating, a pin 25 that penetrates the other end side core material 17 and the support portion 18 and is fixed may be used.

[0049] The locking mechanism prevents the cores 15, 17 from rotating, so that the roll-shaped filter will not rotate even if the prefilter is sucked in when the exhaust device is operating.

[0050] (1.5. Description of Support Parts)

[0051] The support portion 18 is installed, for example, on the ground so as to facilitate replacement of the prefilter 14, and is formed, for example, from two spaced apart plate-like bases 18a, 18a having recesses 26 at their upper ends on which one end and the other end of the core material 17 can be placed and supported, respectively.

[0052] The support 16 may be shaped similarly to the support 18 .

[0053] In addition, the support part 16 may have a shape different from that of the support part 18. For example, when the prefilter 14 does not have a core material 15 on one end side, the prefilter may be supported by inserting a rod into a central through hole formed in the roll-shaped prefilter, or the support part may be concave on which the roll-shaped prefilter itself can be placed.

[0054] 2. Description of How to Use the Invention

[0055] In the present invention, first, the pre-filter 14 wound in a roll before use is placed on the one-end support portion 16 so as to be freely rotatable.

[0056] Then, the tip portion of the prefilter 14 is stretched and inserted into the exhaust box 9 from the inlet portion 20 of the exhaust box 9, passed through the guide portion 22, and pulled out to the outside from the outlet portion 21.

[0057] At this time, the pre-filter 14 is arranged, for example, in an M-shape by the guide portion 22, so that the surface area can be increased.

[0058] Then, the tip portion of the prefilter 14 is fixed to the other end side core material 17 and placed on the other end side support portion 18 .

[0059] The other end side core material 17 may be a new one, or the one end side core material 15 from which the prefilter has been removed may be utilized.

[0060] Then, in a state where the shutter plate 23 closes the outlet portion 21, the core material 17 is locked by a locking mechanism so as not to rotate.

[0061] Then, the exhaust fan is driven and the exhaust device is put into use.

[0062] After a desired time has elapsed, in order to replace the pre-filter 14 in the exhaust box 9, a handle 24 is provided on the other end core material 17 (which may be fixed in advance), and the locking mechanism is released to make the core material 17 rotatable. For example, the handle 24 is rotated to wind up the pre-filter around the other end core material 17.

[0063] There is no particular limit to the amount of winding, and it is preferable to wind the prefilter 14 until a new prefilter 14 is placed in the exhaust box 9, for example.

[0064] At this time, when the prefilter 14 is wound up, the prefilter 14 at the outlet portion 21 pushes the shutter plate 23 upward and moves upward, so by increasing the angle of the prefilter 14 at the outlet portion 21, winding up becomes easier.

[0065] In addition, since the prefilter 14 is wound around the core 17 with the dirty surface facing inward, hands will not get dirty when discarding the wound prefilter 14.

[0066] When the roll-shaped prefilter 14 supported by the one-end support portion 15 is used up, the one-end core material 15 is removed from the support portion 16, and the one-end core material 15 of a new roll-shaped prefilter 14 is placed on the one-end support portion 16 and its tip is connected to the rear end of the previous prefilter 14, for example with an insulation lock, thereby connecting the old prefilter and the new prefilter.

[0067] The removed old one-end side core material 15 may be reused later as the other-end side core material 17.

[0068] According to the present invention, the pre-filter can be easily replaced.

[0069] In addition, since the worker does not need to enter the exhaust system, exposure to paint mist can be prevented.

[0070] In addition, by folding the pre-filter into the same M shape as the exhaust filter, the surface area is increased, reducing the frequency of replacement.

[0071] In addition, a cardboard core is used for winding, and the dirty side of the pre-filter is wound up on the inside, making it easy to dispose of without workers getting dirty.

[0072] In addition, by providing a vertically movable shutter at the outlet, the opening opens to make the prefilter angle gentler when the prefilter is wound up, and closes when the exhaust device is operating, thereby improving exhaust efficiency.

[0073] Furthermore, by attaching a round bar (or roller) to the tip of the vertically movable shutter plate 23, the resistance when winding up the prefilter can be reduced. [Explanation of symbols]

[0074] 1 Booth 1a Ceiling 1b Paint drying space 2. Intake system 3. Exhaust system 4. Intake Filter 5 Intake box 6. Intake fan unit 7. Intake duct 8. Ceiling Filter 9 Exhaust Box 9a One side wall 9b Other side wall 10 Exhaust duct 11 Exhaust filter 12 Exhaust fan unit 13 Exhaust pit 14 Pre-filter 15 Core material on one end side 16 Pre-filter support part on one end 17 Other end core material 18 Pre-filter support part on the other end 18a units 19 Pre-Filter Guide 20 Entrance 21 Exit section 22 Guide section 22a Upper support part 22b Lower support part 22c Upper support part 23 Shutter plate 23a Roller 24 Handle 25-pin 26 Recess

Claims

1. A pre-filter and The prefilter is inserted from the outside of an exhaust box of a paint booth exhaust system having an exhaust filter, which filters the air in the paint booth and exhausts it to the outside of the paint booth; In the coating booth, the exhaust gas passes through the downstream side of the exhaust filter, A prefilter device provided in an exhaust system for a paint booth, comprising a prefilter support portion provided so as to be drawn out to the outside of the exhaust box.

2. The prefilter support portion includes a first end prefilter support portion that is provided at one end of the exhaust box and that rotatably supports a base portion of the prefilter wound in a roll shape; an other end prefilter support part provided on the other end side that rotatably supports a tip part of the prefilter in a winding direction; A means for winding up the tip portion; 2. The prefilter device according to claim 1, further comprising a prefilter guide formed in said exhaust box for guiding the prefilter passing therethrough.

3. The pre-filter guide has an inlet portion formed through one side wall of the exhaust box, an outlet portion formed through the other side wall; 3. The prefilter device according to claim 2, further comprising a support member provided in said exhaust box for bending and positioning said prefilter inserted in said exhaust box.

4. The outlet portion has a shutter portion that is movable up and down to close the opening of the outlet portion from above to below, The shutter portion is always positioned below the outlet portion so as to close the outlet portion.

4. The prefilter device provided in an exhaust system for a paint booth according to claim 3, characterized in that, when the prefilter passing through said outlet portion rises, said prefilter device is positioned upward as said prefilter rises.

5. an exhaust box of an exhaust device for a paint booth having an exhaust filter that filters the air in the paint booth and exhausts it to the outside of the paint booth; A pre-filter and The pre-filter is inserted from the outside of the exhaust box, In the coating booth, the exhaust gas passes through the downstream side of the exhaust filter, and a prefilter support portion provided so as to be extended outward from said exhaust box.

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