Coating deodorizing device and coating deodorizing method

Abstract

Provided is a coating deodorizing device and a coating deodorizing method that are suitable for coating. [Solution] The ejector (20) has a supply port (22) to which pressurized air is supplied, an exhaust port (24) from which the pressurized air supplied from the supply port (22) is discharged, and a negative pressure port (26) provided between the supply port (22) and the exhaust port (24); a dust removal filter (40) provided on the side of the negative pressure port (26) for removing dust from the odorous gas containing paint dust as the odorous gas passes through it; and a deodorizing filter (30) provided on the side of the exhaust port (24) for deodorizing the odorous components of the odorous gas as the odorous gas that has passed through the dust removal filter (40) passes through it.

Description

[Technical Field]

[0001] The present invention relates to a coating deodorizing apparatus and a coating deodorizing method for deodorizing odorous gases generated particularly during coating of bathtubs. [Background technology]

[0002] Bathtubs need to be repaired or replaced due to deterioration over time. In recent years, services have been offered to refurbish (remodel) bathtubs without replacing (dismantling) them (for example, "Furoichi" (registered trademark)). Note that bathtubs eligible for refurbishment are not limited to those used in homes, but also include those used in hotels, inns, and other accommodation facilities.

[0003] When renovating a bathtub, a coating is performed. During the coating process, odorous gases from organic solvents in the paint may be generated. In such cases, it is desirable to use a deodorizing device to remove the odorous gases in combination with the coating equipment.

[0004] Patent Document 1 discloses a deodorizing device that uses a blower to send odorous gas containing organic solvents into a container. Inside the container, a filter loaded with activated carbon (adsorbent) is provided, and the odorous gas is deodorized by passing it through this filter.

[0005] However, the deodorizing device of Patent Document 1 has the problem that if the amount of adsorbent is increased to enhance the deodorizing effect, the adsorbent acts as an air resistor that obstructs the flow of odorous gas, making it impossible to achieve a sufficient deodorizing effect.

[0006] On the other hand, Patent Document 2 discloses a carbonization apparatus for carbonizing organic waste, which is equipped with a deodorizing device.

[0007] The carbonization apparatus of Patent Document 2 includes a carbonization furnace, a separation tank, an ejector, and a deodorization device. According to this carbonization apparatus, air generated in the carbonization furnace is sucked out of the carbonization furnace by the ejector and supplied to the separation tank, where tar, dust, and water vapor are separated from the air. After that, the air is passed through the deodorization device to be deodorized. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-291549 [Patent Document 2] Japanese Patent Application Laid-Open No. 2001-19970 Summary of the Invention [Problem to be solved by the invention]

[0009] The deodorizing device disclosed in Patent Document 2 has a configuration in which odorous gas is caused to flow by high-pressure air generated by an ejector, so compared to the deodorizing device of Patent Document 1, which causes odorous gas to flow by low-pressure air generated by a blower, it can obtain a flow of odorous gas even if the amount of adsorbent is increased. In this way, the deodorizing device disclosed in Patent Document 2 has the advantage of being able to obtain a flow of odorous gas even if the amount of adsorbent is increased.

[0010] However, the odorous gases generated during bathtub coating contain paint dust. Therefore, the deodorizing device of Patent Document 2 has the problem that the dust accumulates on the (inner walls of) the air passage of the ejector, and in this case, the accumulated dust is likely to become an air resistor. In other words, if the ejector is applied as is to a deodorizing device for bathtub coating, the accumulated dust will prevent sufficient deodorizing effect from being obtained, and there is a problem that it is difficult to apply the ejector to a deodorizing device for odorous gases containing paint dust.

[0011] The present invention has been made in view of the above circumstances, and has as its object to provide a coating deodorizing apparatus and a coating deodorizing method that are suitable for coating applications. [Means for solving the problem]

[0012] A first aspect of the deodorizing device for coating of the present invention comprises an ejector having a supply port to which pressurized air is supplied, an exhaust port through which the pressurized air supplied from the supply port is discharged, and a negative pressure port provided between the supply port and the exhaust port; a dust removal filter provided on the side of the negative pressure port through which odorous gas containing paint dust passes to remove dust from the odorous gas; and a deodorizing filter provided on the side of the exhaust port through which the odorous gas that has passed through the dust removal filter passes to deodorize the odorous components of the odorous gas.

[0013] According to the first aspect of the coating deodorization apparatus of the present invention, when pressurized air is supplied to the supply port, odorous gas generated during coating passes through a dust filter provided on the side of the negative pressure port. At this time, paint dust contained in the odorous gas is removed by the dust filter and does not adhere to the air passage of the ejector. The odorous gas from which the dust has been removed is then exhausted by high-pressure air discharged from the ejector, passing through a deodorizing filter provided on the side of the exhaust port. At this time, the odorous components of the odorous gas are removed by the deodorizing filter. As such, the coating deodorization apparatus of the present invention is equipped with an ejector that generates negative pressure, a dust filter provided on the side of the negative pressure port of the ejector, and a deodorizing filter provided on the side of the exhaust port of the ejector, and is therefore suitable for use in coating.

[0014] In a second aspect of the deodorizing apparatus for coating of the present invention, the deodorizing filter is an activated carbon filter having activated carbon.

[0015] A third aspect of the deodorizing apparatus for coating of the present invention comprises a first air tube connecting the activated carbon filter to the exhaust port, and a second air tube connecting the dust removal filter to the negative pressure port.

[0016] A fourth embodiment of the deodorizing device for coating of the present invention comprises a pressurized air supply source that supplies pressurized air, and a third air tube that connects the pressurized air supply source to the supply port.

[0017] In a fifth aspect of the deodorizing apparatus for coating of the present invention, the dust removal filter is disposed inside the bathroom, and the ejector, the deodorizing filter, and the pressurized air supply source are disposed outside the bathroom.

[0018] A first aspect of the deodorizing method for coating of the present invention is a method for deodorizing odorous gases containing paint dust generated when painting a bathroom bathtub using the deodorizing device for coating of the present invention, and comprises a deodorizing device installation step of arranging a dust removal filter inside the bathroom and arranging an ejector, deodorizing filter, and pressurized air supply source outside the bathroom; an isolation step of covering the periphery of the bathroom with a protective sheet to spatially isolate the inside of the bathroom from the outside of the bathroom; and a deodorizing step of supplying pressurized air from the pressurized air supply source to a supply port, thereby passing the odorous gases inside the bathroom from the dust removal filter to the deodorizing filter and exhausting them outside the bathroom.

[0019] In a second embodiment of the deodorizing method for coating of the present invention, a compressor provided in the coating device is used as a pressurized air supply source in the deodorizing step. [Effects of the Invention]

[0020] According to the present invention, it is possible to provide a coating deodorizing apparatus and a coating deodorizing method that are suitable for use in coating. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a structural diagram of a coating deodorization device according to an embodiment of the present invention. [Figure 2] This is a plan view of a bathroom showing the installation position of a deodorizing device when coating a bathtub. [Figure 3] 3 is a flowchart showing a method for deodorizing odorous gas using a deodorizing device. [Figure 4] FIG. 10 is a structural diagram showing a modified example of the deodorizing device. DETAILED DESCRIPTION OF THE INVENTION

[0022] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a coating deodorizing apparatus and a coating deodorizing method according to the present invention will be described with reference to the accompanying drawings.

[0023] FIG. 1 is a structural diagram of a deodorizing device for coating (hereinafter abbreviated as "deodorizing device") 10 according to an embodiment of the present invention.

[0024] 1 is a schematic diagram of the configuration of the deodorizing device 10, and the scale of each component constituting the deodorizing device 10 is different from the actual scale. The same applies to FIGS. 2 and 4 described below.

[0025] In the following explanation, the expression "on the side of" includes both "directly to" and "indirectly to." The arrows shown in the figure indicate the flow direction of air containing odorous gas (hereinafter referred to as "odorous gas") and air not containing odorous gas (hereinafter referred to as "outside air").

[0026] 1, a deodorizing device 10 of this embodiment includes an ejector 20, a deodorizing filter 30, and a dust removal filter 40. The ejector 20, the deodorizing filter 30, and the dust removal filter 40 are examples of the ejector, the deodorizing filter, and the dust removal filter of the present invention, respectively.

[0027] The ejector 20 is a commercially available ejector having a known structure, and has a supply port 22, an exhaust port 24, and a negative pressure port 26 provided between the supply port 22 and the exhaust port 24. The supply port 22, the exhaust port 24, and the negative pressure port 26 are examples of the supply port, the exhaust port, and the negative pressure port of the present invention, respectively.

[0028] The ejector 20 also has a substantially T-shaped air passage 28 therein that connects the supply port 22, the exhaust port 24, and the negative pressure port 26. For ease of explanation, the air passage 28 is shown by a solid line in FIG.

[0029] Air passage 28 includes a nozzle (not shown) connected to supply port 22, a diffusion chamber (not shown), and a diffuser (not shown). The inner diameter (diameter) of air passage 28 is, for example, approximately 0.5 mm to 2.0 mm. That is, ejector 20 of this example is a small, portable ejector suitable for use in deodorizing device 10 for painting bathtubs.

[0030] The function and operating principle of the ejector 20 shown in Figure 1 are well known, but will be briefly explained below. When pressurized outside air (hereinafter referred to as "pressurized air") is supplied to the supply port 22, the pressurized air is throttled by the nozzle and released at high speed into the diffusion chamber, where it expands and diffuses and flows into the diffuser. This high-speed flow reduces the pressure in the diffusion chamber, causing air (in this example, odorous gas) to flow from the negative pressure port 26 into the diffusion chamber. The air that has flowed in, along with the high-speed pressurized air (high-pressure wind) released from the nozzle, is then discharged from the diffuser via the exhaust port 24. In other words, the ejector 20 is a device that generates negative pressure to generate a vacuum suction force at the negative pressure port 26. Therefore, to operate the ejector 20, a pressurized air supply source is connected to the supply port 22 side.

[0031] In this example, an existing compressor 50 provided in a bathtub painting device can be used as the pressurized air supply source. This compressor 50 generates pressurized air for spraying paint from a paint spray nozzle (not shown).

[0032] The compressor 50 is connected to the supply port 22 via an air tube 52. That is, the deodorizing device 10 of this embodiment has the air tube 52 that connects the compressor 50 to the supply port 22.

[0033] The pressurized air supply source is not limited to the compressor 50, and a pressurized air supply source dedicated to the deodorizing device may be used. However, by also using the compressor 50 provided in the coating device as an air supply source, the configuration of the deodorizing device 10 can be simplified. The compressor 50 and the air tube 52 are examples of the compressor and the third air tube of the present invention. Furthermore, the number of compressors 50 is not limited to one, and multiple compressors may be used.

[0034] A dust removal filter 40 is connected to the negative pressure port 26. As a result, when a vacuum suction force is generated at the negative pressure port 26, odorous gas (organic solvent-based odorous gas containing paint dust) generated during coating passes through the dust removal filter 40. Therefore, the paint dust contained in the odorous gas is removed by the dust removal filter 40.

[0035] In this example, the dust filter 40 is connected to the negative pressure port 26 via an air tube 42. That is, the deodorizing device 10 of this embodiment has the air tube 42 that connects the dust filter 40 to the negative pressure port 26. The air tube 42 is an example of the second air tube of the present invention.

[0036] The dust filter 40 is housed in a case 44 connected to an air tube 42. That is, the dust filter 40 and the case 44 constitute a dust filter unit 48, and when the dust filter 40 needs to be replaced due to the end of its service life, it can be replaced as a whole dust filter unit 48. Also, only the dust filter 40 may be replaced, or only the internal element of the dust filter 40 may be replaced.

[0037] The case 44 is configured, for example, in a cylindrical shape, and the dust filter 40 is configured in a disk shape having a thickness in the intake direction to match the shape of the case 44. The dust filter 40 is attached in close contact with the inner peripheral surface of the case 44 or via an airtight seal (not shown). The dust filter 40 has a surface area that is at least 10 times larger than the opening area of ​​the tube 42 (negative pressure port 26).

[0038] The dust filter 40 is connected to the air tube 42 through a buffer space 46 having a gas diffusion function within the case 44. The buffer space 46 has, for example, approximately the same volume as the dust filter 40.

[0039] Therefore, the odorous gas (dust-free odorous gas) that has passed through the dust removal filter 40 is once sucked into the buffer space 46 and diffused before being sucked into the air tube 42. As a result, the odor components of the dust-free odorous gas are homogenized in the buffer space 46, and then the gas is sucked in by the negative pressure generated by the ejector 20 and sent to the deodorizing filter unit 38, which will be described later.

[0040] By providing such a buffer space 46 in the dust filter unit 48, odorous gas can be sucked from the entire upstream (inlet) surface of the dust filter 40. Therefore, the entire dust filter 40 can function as a dust filter.

[0041] In this example, a filter sheet made of glass fiber or nonwoven fabric is exemplified as the dust filter 40. Also, for example, a commercially available range hood filter (e.g., Kireidea (registered trademark)) can be used as the dust filter 40. When using this range hood filter, it is preferable to use two or three overlapping filters with a thickness of about 10 mm.

[0042] A deodorizing filter 30 is connected to the exhaust port 24. This allows the dust-free odorous gas to pass through the deodorizing filter 30 together with the high-pressure air discharged from the ejector 20. Therefore, the odorous components contained in the dust-free odorous gas are removed by the deodorizing filter 30.

[0043] In this example, the deodorizing filter 30 is connected to the exhaust port 24 via an air tube 32. That is, the deodorizing device 10 of this embodiment has the air tube 32 that connects the deodorizing filter 30 to the exhaust port 24. The air tube 32 is an example of the first tube of the present invention.

[0044] The deodorizing filter 30 is housed in a case 34 connected to an air tube 32. That is, the deodorizing filter 30 and the case 34 constitute a deodorizing filter unit 38, and when the deodorizing filter 30 reaches the end of its service life, it can be replaced as a whole deodorizing filter unit 38. Also, only the deodorizing filter 30 may be replaced, or only the internal element of the deodorizing filter 30 may be replaced.

[0045] The case 34 is configured, for example, in a cylindrical shape, and the deodorizing filter 30 is configured in a disk shape having a thickness in the exhaust direction to match the shape of the case 34. The deodorizing filter 30 is attached to the inner peripheral surface of the case 34 via an airtight seal (not shown). The deodorizing filter 30 has a surface area that is at least 10 times larger than the opening area of ​​the air tube 32 (exhaust port 24).

[0046] The deodorizing filter 30 is connected to the air tube 32 through a buffer space 36 having a gas diffusion function within the case 34. The buffer space 36 has, for example, approximately the same volume as the deodorizing filter 30.

[0047] Therefore, the dust-free odorous gas sent from the air tube 32 to the case 34 is temporarily taken into the buffer space 36 and diffused before passing through the deodorizing filter 30. This makes it possible to prevent the odorous gas sent together with the high-pressure air from directly colliding with the deodorizing filter 30.

[0048] By providing such a buffer space 36 in the deodorizing filter unit 38, the deodorizing gas can be exhausted from the entire downstream (outlet) side surface of the deodorizing filter 30. Therefore, the entire deodorizing filter 30 can function as a deodorizing filter.

[0049] In this example, an activated carbon filter in which activated carbon (adsorbent) capable of adsorbing odor components is densely packed is exemplified as the deodorizing filter 30. In this case, the activated carbon filter can be constructed by densely packing activated carbon into a breathable bag-shaped sheet.

[0050] When such an activated carbon filter is used, it has been confirmed through experiments that odorous gases pass through the activated carbon filter even when the pressure of the compressed air from the compressor 50 is relatively low (approximately 0.05 to 0.1 MPa).

[0051] The adsorbent is not limited to activated carbon, and other adsorbents capable of deodorizing (e.g., zeolite, silica gel, activated alumina, clay minerals, etc.) can also be used. The adsorbent does not necessarily need to be concentrated at a high density, but it is preferable to concentrate it at a high density in order to enhance the deodorizing effect of odorous components.

[0052] However, when coating bathtubs, odorous organic solvent gases are generated, and these odorous gases contain paint dust. If an ejector is directly applied to such a coating deodorizing device, the dust may accumulate in the air passage of the ejector, making it difficult to apply the ejector to a bathtub coating deodorizing device.

[0053] Therefore, the deodorizing device 10 of this embodiment solves the above problem by adopting the following configuration.

[0054] That is, the deodorizing device 10 of this embodiment employs a configuration in which the dust removal filter 40 is provided on the side of the negative pressure port 26. As a result, according to the deodorizing device 10 of this embodiment, when a vacuum suction force is generated at the negative pressure port 26, the odorous gas generated during coating is sucked into the negative pressure port 26 and passes through the dust removal filter 40 arranged upstream of the negative pressure port 26.

[0055] At this time, paint dust contained in the odorous gas is removed (captured) by the dust removal filter 40, and does not adhere to the air passage 28 of the ejector 20. Then, the dust-free odorous gas from which the dust has been removed by the dust removal filter 40 is exhausted from the exhaust port 24 by high-pressure air through the deodorizing filter 30. At this time, the odorous components contained in the odorous gas are removed by the deodorizing filter 30.

[0056] Therefore, the deodorizing device 10 of this embodiment is equipped with the ejector 20 that generates negative pressure, the dust removal filter 40 provided on the side of the negative pressure port 26 of the ejector 20, and the deodorizing filter 30 provided on the side of the exhaust port 24 of the ejector 20, and therefore can exhibit stable deodorizing performance even when used for long periods of time. Therefore, the deodorizing device 10 of this embodiment is suitable as a deodorizing device for coating.

[0057] Next, an example of a deodorizing method when the deodorizing apparatus 10 of this embodiment is applied to a coating deodorizing apparatus for a bathtub will be described.

[0058] Fig. 2 is a plan view of a bathroom 110 showing the installation position of the deodorizing device 10 when coating the bathtub 100. The bathroom 110 shown in Fig. 2 is an example of a bathroom in an apartment building, but is not limited to this and may be a bathroom in a detached house or a bathroom in a lodging facility such as a hotel or inn.

[0059] First, we will briefly explain the configuration of the bathroom 110 shown in Figure 2. The bathroom 110 has a floor 112, a ceiling (not shown), and walls (including above and below the waist) 114. The bathtub 100 is installed on the floor 112, and a counter 116 is installed on the wall 114.

[0060] In addition, bathroom 110 is adjacent to washroom 120 via door 118, and this washroom 120 is adjacent to a hallway or the like (not shown) within the dwelling unit via door 122. In addition, bathroom 110 and washroom 120 are separated by their respective walls from a shared area (e.g., a shared hallway) 124 outside the dwelling unit.

[0061] When renovating (repainting) the bathtub 100 shown in Fig. 2, it is necessary to effectively deodorize (including remove dust) the odorous gases generated during the painting. An example of this deodorizing method will be described with reference to the flowchart shown in Fig. 3.

[0062] As shown in Figure 3, the deodorizing method for coating of this embodiment (hereinafter referred to as "deodorizing method") includes a deodorizing device installation step (S10), an isolation step (S20), and a deodorizing step (S30). The work performed in each step will be described below.

[0063] [Deodorization device installation process (S10)] The dust filter 40 is arranged inside the bathroom 110, and the ejector 20, the deodorizing filter 30 and the compressor 50 are arranged outside the bathroom 110.

[0064] Specifically, the dust removal filter unit 48 is installed on the floor 112 or counter 116 of the bathroom 110. The air tube 42 is arranged from the bathroom 110 to the washroom 120 by opening the door 118, and is then arranged from the ventilation window 126 of the washroom 120 to the shared area 124 and connected to the negative pressure port 26 of the ejector 20 (FIG. 1).

[0065] In the shared section 124, the deodorizing filter unit 38 is connected to the exhaust port 24 of the ejector 20 via an air tube 32, and the compressor 50 is connected to the supply port 22 of the ejector 20 via an air tube 52. Flexible tubes are used for each of the air tubes 32, 42, and 52.

[0066] [Isolation process (S20)] The bathroom 110 is surrounded by protective sheets 130, 132, 134 to spatially separate the interior of the bathroom 110 from the exterior of the bathroom 110.

[0067] Specifically, a protective sheet 130 (e.g., a vinyl sheet) is attached to the wall surface of the wall 140 separating the bathroom 110 and the washroom 120 on the side facing the washroom 120. Also, a protective sheet 132 is attached to the wall surface of the wall 142 separating the washroom 120 from the hallway of the dwelling unit on the side facing the washroom 120. At this time, the door 122 is closed beforehand. Also, a protective sheet 134 is attached to the wall surface of the wall 144 separating the washroom 120 from the common area 124 on the side facing the common area 124. This prevents odorous gases generated by the coating from leaking outside the bathroom 110 (to the hallway and common area 124 of the dwelling unit).

[0068] [Deodorization step (S30)] Pressurized air is supplied from a compressor 50 to a supply port 22, and odorous gas containing dust inside the bathroom 110 is sucked through a dust removal filter 40, passes through a deodorizing filter 30, and is exhausted to the outside of the bathroom 110.

[0069] Specifically, pressurized air is supplied from compressor 50 to supply port 22. Then, the vacuum suction force generated at negative pressure port 26 causes odorous gas in bathroom 110 to pass through dust removal filter 40, buffer space 46, and air tube 42, and be sucked from negative pressure port 26 into air passage 28. At this time, paint dust contained in the odorous gas does not adhere to air passage 28 because it has been removed by dust removal filter 40.

[0070] The dust-free odorous gas from which the dust has been removed passes through the air passage 28 by the force of the high-speed flow, and is exhausted from the exhaust port 24 through the air tube 32, buffer space 36, and deodorizing filter 30 to the common section 124. At this time, the odorous components contained in the odorous gas have been removed by the deodorizing filter 30, so odorless air is exhausted to the common section 124.

[0071] Therefore, the deodorizing method of this embodiment includes the deodorizing device installation step (S10), the isolation step (S20), and the deodorizing step (S30), and therefore can exhibit stable deodorizing performance even over long periods of use. Therefore, the deodorizing method of this embodiment is suitable as a deodorizing method for coating.

[0072] In addition, in the deodorizing method of this embodiment, while the deodorizing device 10 and the painting device are operating, the interior of the bathroom 110 is spatially isolated from the outside by protective sheets 130, 132, and 134, thereby preventing odorous gases inside the bathroom 110 from leaking outside.

[0073] Furthermore, the deodorizing method of this embodiment uses the compressor 50 used in coating as the air supply source for supplying pressurized air to the deodorizing device 10, so no additional costs are incurred and it is economical.

[0074] Furthermore, the deodorizing method of the present embodiment does not require a blower (environmental improvement recovery machine) for discharging odorous gases, which has conventionally been required, and therefore power consumption can be reduced.

[0075] Ducts are typically used in bathtub painting processes. In this case, the odorous and dusty exhaust air emitted from the duct is extended using a simple duct made of vinyl or other material and exhausted outdoors (outside the building). One possible method of taking in dusty and odorous air is to use a small compressor. In this case, the compressor would be placed inside the bathroom, and the dusty and odorous air would be directly drawn in by the compressor. After compressing the air in the compressor itself, the air would be passed through a high-density deodorizing filter to deodorize and remove dust. However, in order to prevent deterioration of moving parts and seals, compressors cannot be used to draw in air containing dust. Therefore, compressors cannot be used in the bathtub painting process.

[0076] In contrast, the deodorizing method of this embodiment uses an ejector 20 that has no moving parts and only allows air to pass through, and that can be installed outside the odorous environment (for example, in the common area 124). This allows the deodorizing device to be made smaller, and stable deodorizing function to be maintained for a long period of time. Furthermore, in this embodiment, the compressor 50 is placed outside the odorous environment, so it does not suck in dust. Therefore, the deodorizing method of this embodiment using the ejector 20 is suitable for use as a deodorizing method for coating a bathtub 100.

[0077] While the deodorizing device 10 is operating (during the coating work), the odorous gases inside the bathroom 110 are sucked in by the ejector 20, creating a negative pressure environment inside the room. During the coating work, the coater may enter or leave the bathroom 110, but at that time, the negative pressure inside the bathroom 110 is created by the negative pressure environment, so that dust and odorous gases are prevented from being released outside the room when the coater enters or leaves the room.

[0078] Fig. 4 is a structural diagram of a deodorizing apparatus 200 showing a modified example of the deodorizing apparatus of the present invention. In explaining the deodorizing apparatus 200 shown in Fig. 4, the same or similar members as those in the deodorizing apparatus 10 shown in Fig. 1 will be described using the same reference numerals.

[0079] The structural difference between a deodorizing apparatus 200 of a modified example shown in Fig. 4 and the deodorizing apparatus 10 shown in Fig. 1 is that the air passage 28 connecting the exhaust port 24 and the negative pressure port 26 of the deodorizing apparatus 10 of Fig. 1 is generally L-shaped, whereas the air passage 28 connecting the exhaust port 24 and the negative pressure port 26 of the deodorizing apparatus 200 of Fig. 4 is generally I-shaped. Also, the air passage 28 connecting the supply port 22 and the exhaust port 24 of the deodorizing apparatus 10 of Fig. 1 is generally I-shaped, whereas the air passage 28 connecting the supply port 22 and the exhaust port 24 of the deodorizing apparatus 200 of Fig. 4 is generally L-shaped.

[0080] That is, in the deodorizing device 200 shown in Fig. 4, the exhaust port 24 and the negative pressure port 26 are connected via a linear air passage, so when the deodorizing device 200 shown in Fig. 4 is configured as one unit, the dust removal filter unit 48 of another unit can be connected to the deodorizing filter unit 38 shown in Fig. 4. In other words, by employing the deodorizing device 200 of Fig. 4, it is possible to configure a deodorizing device in which a plurality of units are connected in series.

[0081] Although examples of the coating deodorizing apparatus and coating deodorizing method according to the present invention have been described above, the present invention may be improved or modified in several ways without departing from the spirit and scope of the present invention. For example, the present invention may be applied to coating deodorizing apparatuses and coating deodorizing methods other than those for bathtubs. [Explanation of symbols]

[0082] 10 Deodorizing device 20 Ejector 22 Supply Port 24 exhaust port 26 Negative pressure port 28 Air passage 30 Deodorizing filter 32 Air tube 34 cases 36 buffer space 38 Deodorizing filter unit 40 Dust removal filter 42 Air tube 44 cases 46 buffer space 48 Dust removal filter unit 50 Compressor 52 Air tube 100 bathtubs 110 Bathroom 112 beds 114 Wall 116 Counter 118 doors 120 Washroom 122 doors 124 Common area 126 Ventilation window 130 Curing Sheet 132 Curing Sheet 134 Curing Sheet 140 Wall 142 Wall 144 Wall 200 Deodorizing device

Claims

1. an ejector having a supply port to which pressurized air is supplied, an exhaust port from which the pressurized air supplied from the supply port is discharged, and a negative pressure port provided between the supply port and the exhaust port; a dust removal filter provided on the side of the negative pressure port, through which odorous gas containing paint dust passes to remove the dust from the odorous gas; a deodorizing filter provided on the side of the exhaust port, through which the odorous gas that has passed through the dust removing filter passes to deodorize odorous components of the odorous gas; Equipped with Deodorizing equipment for coating.

2. The deodorizing filter is an activated carbon filter having activated carbon. The coating deodorizing device according to claim 1.

3. a first air tube connecting the activated carbon filter to the exhaust port; a second air tube connecting the dust filter to the negative pressure port; having The deodorizing apparatus for coating according to claim 2.

4. a pressurized air supply source that supplies the pressurized air; a third air tube connecting the pressurized air supply source to the supply port; having The deodorizing apparatus for coating according to claim 3.

5. The dust removal filter is disposed inside the bathroom, and the ejector, the deodorizing filter, and the pressurized air supply source are disposed outside the bathroom. A coating deodorizing device according to any one of claims 1 to 4.

6. 5. A method for deodorizing an odorous gas containing paint dust generated during painting of a bathroom bathtub using the deodorizing apparatus for coating according to claim 4, a deodorizing device installation step of arranging the dust removal filter inside the bathroom and arranging the ejector, the deodorizing filter, and the pressurized air supply source outside the bathroom; an isolation step of spatially isolating the interior of the bathroom from the exterior of the bathroom by covering the periphery of the bathroom with a protective sheet; a deodorizing step of supplying pressurized air from the pressurized air supply source to the supply port, thereby passing the odorous gas in the bathroom through the dust removal filter and the deodorizing filter and exhausting it to the outside of the bathroom; Equipped with Deodorizing method for coating.

7. In the deodorizing step, a compressor provided in a coating device is used as the pressurized air supply source. The deodorizing method for coating according to claim 6.

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