JP7800941B2 - Painting method - Google Patents

Description

The present invention relates to a coating method.

Traditionally, when painting a specific surface such as a ceiling indoors, drying is done by generating airflow indoors using a large electric fan.

Japanese Patent Application Publication No. 4-317772

Indoor use is restricted until the paint drying process is complete, and conventional methods using large electric fans take a long time to dry. This means that, for example, in factories where painting is done, painting can only be done during long holiday periods when operations are halted for long periods. Therefore, there is a demand for a painting method that can efficiently perform drying and complete painting early, allowing painting to be completed, for example, at night.

One known method for speeding up drying in paint applications is a drying method for drying a coating applied to a building material (see, for example, Patent Document 1). In this drying method, after the paint is applied to the building material, a fan blows air onto the coating to dry the surface layer of the coating, and the coating is then heated with a heater to completely dry the paint.

The drying method disclosed in Patent Document 1 uses a dedicated drying device to dry building materials. Therefore, it is not possible to use the method disclosed in Patent Document 1 to dry paint on a specific surface in a specific indoor space.

The present invention was made in consideration of the above circumstances, and aims to provide a painting method that can efficiently dry paint when painting a specific surface in a specific indoor space.

To achieve this objective, the first aspect of the present invention is a painting method comprising: a painting process in which a predetermined paint is applied to a predetermined surface in a predetermined indoor space; and a paint drying process in which, at least during and after the painting process, a desiccant-based dehumidifier is used to dehumidify and heat the air in the predetermined space, and the dehumidified and heated air is directed toward the predetermined surface, thereby drying the applied paint.

A second aspect of the present invention is a coating method according to the first aspect, which further includes a pre-painting drying step in which, prior to the coating step, the dehumidifier is used to dehumidify and heat the air in the specified space, and the dehumidified and heated air is directed toward the specified surface to dry the surface to be coated.

A third aspect of the present invention is a coating method according to the second aspect, which further comprises a mold removal process for removing mold from the specified surface before the coating process, and the pre-coating drying process is carried out at least during the mold removal process and before the coating process, using the dehumidifier to dehumidify and heat the air in the specified space, and directing the dehumidified and heated air toward the specified surface to dry the surface that became wet in the mold removal process.

A fourth aspect of the present invention is a coating method according to the third aspect, which further includes a pre-mold removal drying step in which, prior to the mold removal step, the dehumidifier is used to dehumidify and heat the air in the specified space, and the dehumidified and heated air is directed toward the specified surface, thereby drying the surface from which mold will be removed.

In a fifth aspect of the present invention, in the coating method according to any one of the first to fourth aspects, the dehumidifier is configured so that an odor-absorbing filter can be installed on at least one of the inlet side that draws in air from the specified space and the outlet side that blows out dehumidified and heated air.

A sixth aspect of the present invention is a coating method according to the third or fourth aspect, wherein the dehumidifier is configured so that odor-absorbing filters can be replaceably installed on at least one of the inlet side that draws in air from the specified space and the outlet side that blows out dehumidified and heated air, and a first filter that absorbs odors generated during the mold removal process is installed during at least the pre-paint drying process, and a second filter that absorbs odors generated during the painting process is installed during at least the paint drying process.

A seventh aspect of the present invention is a coating method according to the fifth or sixth aspect, wherein the dehumidifier is configured to allow multiple filters to be installed in a vertical row.

In an eighth aspect of the present invention, in the coating method according to any one of the first to seventh aspects, the coating method further includes a curing step of surrounding the specified space from ceiling to floor with a curing sheet before drying using the dehumidifier.

A ninth aspect of the present invention is a coating method according to any one of the third, fourth, and sixth aspects, wherein the specified paint used in the coating process is a paint having antifungal properties.

In the painting method according to the first aspect of the present invention, during and after the painting process in which a predetermined paint is applied to a predetermined surface in a predetermined indoor space, the air in the predetermined space is dehumidified by a desiccant-based dehumidifier, heated to a temperature higher than the temperature within the predetermined space, and directed toward the predetermined surface. This reduces the humidity of the air near the predetermined surface, accelerating the drying of the painted surface. This has the effect of enabling efficient drying of paint when painting a predetermined surface in a predetermined indoor space.

The coating method according to the second aspect of the present invention achieves the following effects in addition to the effects achieved by the method according to the first aspect. Specifically, the pre-coating drying process dehumidifies and heats the air in a designated space before the coating process, and the dehumidified and heated air is applied to the designated surface. The designated surface to which the dehumidified and heated air has been applied is then dried in advance before the coating process begins. This has the effect of ensuring that an appropriate amount of paint adheres to the designated surface during the coating process. Furthermore, because the adhesion of the paint can be improved, it has the effect of preventing the paint from peeling off from the designated surface for a long period of time even after the coating process.

The painting method according to the third aspect of the present invention achieves the following effect in addition to the effects achieved by the method according to the second aspect. Specifically, the mold removal process removes mold that has grown on the specified surface before the painting process. This has the effect of suppressing mold growth on the specified surface after the painting process, and ultimately suppressing mold growth. Furthermore, during the mold removal process and before the painting process, the air in the specified space is dehumidified and heated to a temperature higher than the temperature in the specified space, and this air is directed toward the specified surface, accelerating the drying of the surface that became wet during the mold removal process. This has the effect of allowing workers to quickly dry the surface that became wet during the mold removal process and begin the next step, the painting process. It also has the effect of preventing poor paint adhesion that occurs when painting while the surface is still wet during the painting process.

The coating method according to the fourth aspect of the present invention achieves the following effect in addition to the effects achieved by the method according to the third aspect. That is, the pre-mold removal drying process dehumidifies and heats the air in the specified space before the mold removal process, and the dehumidified and heated air is applied to the surface on which mold removal will be performed. This dries the surface in advance before the mold removal process. This has the effect of allowing the chemicals used during the mold removal process to reach the mold spores and hyphae that have developed on the surface.

The coating method according to the fifth aspect of the present invention achieves the following effect in addition to the effects achieved by the methods according to the first to fourth aspects. Namely, odors within a specified space are adsorbed by a filter installed on at least one of the inlet and outlet sides of a desiccant-type dehumidifier. This has the effect of adsorbing odors generated during the coating process, making it possible to dry a specified surface using a desiccant-type dehumidifier while also removing odors from the specified space.

The painting method according to the sixth aspect of the present invention achieves the following effect in addition to the effects achieved by the methods according to the third or fourth aspect. Specifically, a replaceable filter is installed on at least one of the inlet and outlet sides of a desiccant-type dehumidifier. The second filter is installed during at least the pre-paint drying process, and the first filter is installed during at least the paint drying process. This allows odors generated during the mold removal process to be adsorbed by the second filter, and odors generated during the painting process to be adsorbed by the first filter. Therefore, filters suitable for removing odors generated in each process can be used, resulting in the effect of reliably removing odors generated within a specified space during each process.

The coating method according to the seventh aspect of the present invention achieves the same effects as the methods according to the fifth or sixth aspects, as well as the following effect. By installing multiple filters in a vertical row, the air in a specified space passes through the multiple filters, and odors are adsorbed. This has the effect of more reliably removing odors from within the specified space.

The painting method according to the eighth aspect of the present invention achieves the following effect in addition to the effects achieved by the methods according to any one of the first to seventh aspects. That is, the specified space is enclosed by the protective sheet from ceiling to floor. This has the effect of efficiently dehumidifying and drying only the air in the specified space. Furthermore, the protective sheet keeps odors generated during the painting process within the specified space. This has the effect of preventing odors from leaking outside the specified space.

The coating method according to the ninth aspect of the present invention achieves the following effect in addition to the effects achieved by the methods according to any of the third, fourth, and sixth aspects. That is, the antifungal paint prevents mold from re-adhering after it has been removed in the mold removal process. This has the effect of preventing mold growth for a long period of time even after coating.

FIG. 2 is a schematic diagram showing the drying of a predetermined surface to be painted by a desiccant dehumidifier. 1 is a schematic diagram of a desiccant dehumidifier used in a coating method according to an embodiment of the present invention. 1 is a diagram showing the flow of each step of a coating method according to an embodiment of the present invention.

The following describes embodiments of the present invention with reference to the accompanying drawings. Each of the embodiments described below represents a preferred specific example of the present invention. Therefore, the numerical values, shapes, materials, components, component placement and connection configurations shown in the following embodiments are merely examples and are not intended to limit the present invention. Therefore, among the components in the following embodiments, components that are not recited in the independent claims that represent the highest concept of the present invention will be described as optional components. Furthermore, in each figure, substantially identical components are designated by the same reference numerals, and redundant explanations will be omitted or simplified.

First, with reference to Figures 1 and 2, we will explain the desiccant dehumidifier 3 used in a coating method according to one embodiment of the present invention. Figure 1 is a schematic diagram showing how a predetermined surface R on which coating is to be performed is dried by the desiccant dehumidifier 3, and Figure 2 is a schematic diagram of the desiccant dehumidifier 3 used in a coating method according to an embodiment of the present invention.

As shown in FIG. 1, room 1 (hereinafter simply referred to as "room 1"), the target of painting work, is a box-shaped space located inside a building and includes a ceiling 21, walls 22, and a floor 23. In the painting method according to this embodiment, a protective sheet 8 is laid from the ceiling 21 to the floor 23, surrounding the surface to be painted (hereinafter referred to as the "predetermined surface R"; FIG. 1 shows the predetermined surface R defined on the ceiling 21) on the ceiling 21, wall 22, or floor 23. Furthermore, in this painting method, an intake duct 31 is installed in the space surrounded by the protective sheet 8 within room 1 (hereinafter referred to as the "predetermined space S") to draw air W1 from the predetermined space S into the desiccant dehumidifier 3, and an exhaust duct 32 is installed to exhaust dry air D3 dehumidified and heated by the desiccant dehumidifier 3 toward the predetermined surface R.

The desiccant dehumidifier 3 is installed outside the room 1 and is a device that dehumidifies and heats the air W1 in the specified space S, and directs the dehumidified and heated dry air D3 toward the specified surface R, thereby drying the specified surface R on which painting will be performed. Note that this embodiment will be described using a hybrid desiccant dehumidifier 3 that combines a compressor system and a desiccant system.

The desiccant dehumidifier 3 is divided into two passages, upper and lower, with a regeneration passage 41 located in the lower section of the main body 30 and a dehumidification passage 42 located in the upper section of the main body 30.

The regeneration passage 41 is a passage for passing air W1, air W2, and air W3 through the regeneration zone 6a of the desiccant rotor 6, which will be described later. The regeneration passage 41 is connected to the suction port 33 on the upstream side and to the dehumidification passage 42 on the downstream side.

The dehumidification passage 42 is a passage for passing dry air D1, dry air D2, and dry air D3 through the dehumidification zone 6b of the desiccant rotor 6. The dehumidification passage 42 connects to the regeneration passage 41 on the upstream side and to the air outlet 34 on the downstream side. A cooler 54 is provided at the connection between the regeneration passage 41 and the dehumidification passage 42 to cool the air W3 that has become highly humid in the regeneration passage 41.

The desiccant dehumidifier 3 also has a desiccant rotor 6 that spans the regeneration passage 41 and the dehumidification passage 42. The regeneration passage 41 has an intake fan 51 and a regeneration heater 52 upstream of the desiccant rotor 6. The dehumidification passage 42 has a reheat heater 56 downstream of the desiccant rotor 6. The desiccant dehumidifier 3 also has a compressor 53 and an expansion valve 55. The regeneration heater 52, compressor 53, cooler 54, and expansion valve 55 are connected by a circulation path, forming a refrigeration cycle 50.

The suction port 33 is connected to the intake duct 31 and is a component for drawing air W1 drawn from a specified space S via the intake duct 31 into the regeneration passage 41 formed within the main body 30.

The air outlet 34 is connected to the exhaust duct 32 and is a component for blowing dry air D3 dehumidified and heated within the main body 30 via the exhaust duct 32 from the dehumidification passage 42 into the specified space S. As described above, the tip of the exhaust duct 32 is positioned to face the specified surface R of the specified space S, and the dehumidified and heated dry air D3 blown out from the air outlet 34 is blown out by the exhaust duct 32 toward the specified surface R.

The desiccant rotor 6 is a disk-shaped rotating body with a honeycomb-shaped structure carrying adsorbent material 61 that adsorbs moisture in the dry air D1. The desiccant rotor 6 is arranged within the main body 30 with its disk surface oriented perpendicular to the regeneration passage 41 and dehumidification passage 42 so that the adsorbent material 61 intersects with the regeneration passage 41 and dehumidification passage 42. The adsorbent material 61 can be made of either inorganic or organic materials; inorganic materials such as silica gel, zeolite, and titanium oxide are used, while organic materials such as water-absorbent polymers and temperature-sensitive polymers are used.

The desiccant rotor 6 is positioned so that its rotation axis 6d is located on the boundary between the regeneration passage 41 and the dehumidification passage 42. As a result, the lower half of the desiccant rotor 6 is located in the regeneration passage 41, and the upper half is located in the dehumidification passage 42. The zone of the desiccant rotor 6 located in the dehumidification passage 42 is called the dehumidification zone 6b. The dehumidification zone 6b brings dry air D1 passing through the dehumidification passage 42 into contact with the adsorbent 61, causing the moisture contained in the dry air D1 to be adsorbed by the adsorbent 61, thereby further dehumidifying and drying the dry air D1 to produce dry air D2. The zone of the desiccant rotor 6 located in the regeneration passage 41 is called the regeneration zone 6a. The regeneration zone 6a regenerates the adsorbent 61 by releasing the moisture adsorbed by the adsorbent 61 into heated air W2.

The desiccant rotor 6 rotates at a constant speed around the rotation axis 6d driven by a motor (not shown). The adsorbent 61, which has adsorbed moisture while positioned in the dehumidification zone 6b for a predetermined time while rotating, moves to the regeneration zone 6a. The adsorbent 61 moves to the regeneration zone 6a and remains there for a predetermined time while rotating. During this time, the adsorbent 61 is regenerated by releasing the adsorbed moisture into the air W2 flowing through the regeneration passage 41. The regenerated adsorbent 61 moves to the dehumidification zone 6b while rotating for a predetermined time. The adsorbent 61 moves to the dehumidification zone 6b and remains there for a predetermined time while rotating, adsorbing moisture contained in the dry air D1 flowing through the dehumidification passage 42, thereby dehumidifying the dry air D1. In this way, the desiccant dehumidifier 3 repeatedly regenerates and dehumidifies the adsorbent 61 through the rotation of the desiccant rotor 6.

The intake fan 51 is a component that draws air W1 from the specified space S into the main body 30 through the intake port 33 and generates an air flow from the regeneration passage 41 to the dehumidification passage 42. The intake fan 51 is located between the intake port 33 and the regeneration heater 52.

The regeneration heater 52 is a heating device that heats the air W1 drawn in through the suction port 33 to produce air W2 in order to regenerate the adsorbent 61 of the desiccant rotor 6 that has adsorbed moisture. The heated air W2 passes through the regeneration zone 6a of the desiccant rotor 6, which is located downstream of the regeneration heater 52, evaporating the moisture adsorbed to the adsorbent 61 located in the regeneration zone 6a. As a result, the air W2 becomes high-humidity air W3.

The compressor 53 is a device that compresses the refrigerant circulating within the refrigeration cycle 50, making it high-temperature and high-pressure. The expansion valve 55 is a device that reduces the pressure of the high-pressure refrigerant sent from the regeneration heater. The high-temperature, high-pressure refrigerant compressed by the compressor 53 is supplied to the regeneration heater 52, where the heat of the refrigerant is released. The refrigerant that has released its heat in the regeneration heater 52 is reduced in pressure by the expansion valve 55, becoming a low-temperature, low-pressure liquid and supplied to the cooler 54.

The cooler 54 is a cooling device for cooling the high-humidity air W3 that has passed through the regeneration zone 6a of the desiccant rotor 6. When the high-humidity air W3 is cooled by the cooler 54, the moisture contained in the air W3 is condensed. This dehumidifies the high-humidity air W3, turning it into dry air D1, which flows into the dehumidification passage 42. The refrigerant in the cooler 54 vaporizes by removing heat from the high-humidity air W3, and is returned to the compressor 53 and circulated again.

The reheat heater 56 is a heating device such as an electric heater that heats the dry air D2 that has passed through the dehumidification zone 6b of the desiccant rotor 6 to produce dry air D3. The dry air D3, whose relative humidity has been further reduced by the reheat heater 56, is blown out from the exhaust duct 32 connected to the outlet 34 toward a specified surface R of the specified space S.

The air inlet 33 is removably fitted with a filter 7 that removes odors generated during the mold removal process P3 and painting process P5, described below. Different filters 7 are used depending on the odor to be removed. For example, the second filter 72 is used to remove the chlorine odor generated by the chemicals used in the mold removal process P3, and the first filter 71 is used to remove the thinner odor generated by the paint used in the painting process P5. By using different filters 7 depending on the odor to be removed, the target odor can be reliably removed. The air inlet 33 is also configured to accommodate multiple filters 7 (e.g., three). Using multiple filters 7 more reliably removes odors. Furthermore, of the three filters that make up the first filter 71, at least two filters may be made of different materials. This more reliably removes various odor components than when the first filter 71 is constructed using three filters made of the same material. While the filter 7 is removably fitted to the air inlet 33 in this embodiment, it may also be installed inside the intake duct 31. The filter 7 may also be installed inside the air outlet 34 or exhaust duct 32.

The protective sheet 8 is a resin sheet that prevents some of the paint used in the painting process P5 from scattering and adhering to areas other than the designated surface R during painting, and prevents odors emitted from the paint from leaking into spaces other than the designated space S. For this reason, work is carried out with the protective sheet 8 in place from the pre-mold removal drying process P2 to the paint drying process P6, which will be described later.

Next, with reference to Figure 3, we will explain the coating method according to this embodiment, which uses the desiccant dehumidifier 3 configured as described above. Figure 3 is a diagram showing the flow of each step in the coating method according to this embodiment.

(Curing process P1)
First, before starting the desiccant dehumidifier 3, the worker performs a curing process P1 as a preliminary preparation for efficiently drying a predetermined surface R provided in a predetermined space S within the room 1.

As shown in FIG. 1, workers install protective sheet 8 from ceiling 21 to floor 23 in room 1 to surround designated surface R. Designated surface R is surrounded by protective sheet 8, and the enclosed space forms designated space S. Designated space S is connected to desiccant dehumidifier 3 via intake duct 31 and exhaust duct 32. Air W1 in designated space S circulates between designated space S and desiccant dehumidifier 3. In this way, protective sheet 8 efficiently dehumidifies only air W1 in designated space S, allowing designated surface R to dry. Furthermore, protective sheet 8 can retain odors generated during mold removal process P3 and painting process P5 (described below) within designated space S and prevent them from leaking outside designated space S. If visible water droplets are present on designated surface R, workers should wipe them off beforehand when installing protective sheet 8. This allows designated surface R to dry more efficiently.

(Pre-mold removal drying process P2)
Next, before carrying out the mold removal process P3, the worker carries out a pre-mold removal drying process P2 as a preliminary preparation to ensure that the chemicals used to remove the mold reach the mold mycelium that is deep-rooted inside the specified surface R without being diluted by moisture adhering to the specified surface R.

The operator attaches three types of second filters 72 to the intake port 33 and starts the desiccant dehumidifier 3 (T1 in Figure 3). Here, the operation of the desiccant dehumidifier 3 will be explained. The desiccant dehumidifier 3 uses the intake fan 51 to draw air W1 from a specified space S through the intake duct 31. The drawn air W1 flows into the regeneration passage 41 within the main body 30. The regeneration heater 52, located upstream of the regeneration passage 41, heats the air W1 flowing through the regeneration passage 41, converting it into high-temperature air W2. As this air W2 passes through the regeneration zone 6a of the desiccant rotor 6, the moisture adsorbed by the adsorbent 61 is released, regenerating the adsorbent 61. As a result, after passing through the regeneration zone 6a of the desiccant rotor 6, the air W2 becomes high-humidity air W3. The cooler 54 then cools the high-humidity air W3, condensing the moisture contained in the air W3 and dehumidifying it to produce dry air D1. The desiccant rotor 6 passes the dry air D1 through the dehumidification zone 6b, where the moisture in the dry air D1 is adsorbed by the adsorbent 61, further dehumidifying the dry air D1 to produce dry air D2. The reheat heater 56, located downstream of the dehumidification zone 6b of the desiccant rotor 6, heats the dry air D2 to produce dry air D3 with a reduced relative humidity. The desiccant dehumidifier 3 discharges the generated dry air D3 from the exhaust duct 32 toward the specified surface R of the specified space S. This reduces the humidity of the air near the specified surface R, pre-drying the specified surface R before the mold removal process. This allows the chemicals used in the mold removal process P3 to reach the mold spores and hyphae that have developed on the dried specified surface R.

(Mold removal process P3)
Next, the worker dries the predetermined surface R in the pre-mold removal drying process P2, and then performs the mold removal process P3 to remove mold that has grown on the predetermined surface R.

The mold removal method involves applying a chemical agent containing sodium hypochlorite as the main ingredient to the area where mold has grown, killing the mold on the surface. After applying the chemical agent, the worker leaves it for a certain period of time until the chemical agent reaches the mold mycelium present inside the specified surface R, allowing the chemical agent to penetrate the mold. This kills mold on the specified surface R and bleaches any mold pigment stains that have adhered to the specified surface R. Furthermore, mold growth on the specified surface R is suppressed even after the painting process P5, which ultimately suppresses mold occurrence on the specified surface R. After allowing the chemical agent to penetrate the mold, the worker wipes off the chemical agent that was applied to the specified surface R.

(Drying process before painting P4)
Next, while the mold removal process P3 is being performed, and from after the mold removal process P3 until the start of the painting process P5, the worker dries the specified surface R that has become wet due to the application of the chemicals, and performs the pre-painting drying process P4 as a preliminary preparation for efficiently performing the next painting process P5.

The intake fan 51 draws air W1 from the designated space S through the intake duct 31 and directs it into the regeneration passage 41 within the main body 30. Three types of second filters 72 installed at the intake port 33 of the main body 30 adsorb and eliminate the chlorine odor generated by the chemicals used in the mold removal process P3. This allows the second filters 72 to reliably eliminate odors generated within the designated space S during the mold removal process P3. Similarly to the operation of the desiccant dehumidifier 3 described above in the pre-mold removal drying process P2, the desiccant dehumidifier 3 passes the odor-removed air W1 through the regeneration passage 41 and dehumidification passage 42 to dehumidify and heat it, and then blows it out as dried air D3 from the exhaust duct 32 toward the designated surface R in the designated space S. This quickly dries the designated surface R that became wet during the mold removal process P3. Additionally, workers can dry the designated surface R that became wet during the mold removal process P3 before starting the next process, the painting process P5, which prevents poor paint adhesion caused by painting the designated surface R while it is still wet during the painting process P5.

(Painting process P5)
Next, the worker dries the specified surface R in the pre-painting drying process P4, and then performs the painting process P5 in which paint is applied to the specified surface R to prevent mold from re-adhering.

The paint used to paint the specified surface R is a paint with anti-mold properties. This prevents mold from re-adhering after removal in the mold removal process P3, and also prevents mold from growing on the specified surface R for an extended period after painting. Furthermore, the paint used in the painting process P5 contains volatile organic compounds (e.g., thinner), which can cause an odor after painting.

(Paint drying process P6)
Next, during and after the painting process P5, the worker performs a paint drying process P6 in which the predetermined surface R that has become wet due to painting is dried.

The worker replaces all three types of second filters 72 attached to the intake port 33 with three types of first filters 71 (T2 in Figure 3). The intake fan 51 draws air W1 from the designated space S through the intake duct 31 and directs it into the regeneration passage 41 inside the main body 30. The three types of first filters 71 attached to the intake port 33 of the main body 30 remove odors generated by the paint used in the painting process P5. As a result, the first filters 71 adsorb odors generated during the painting process P5 and reliably eliminate the odors within the designated space S. Similarly to the operation of the desiccant dehumidifier 3 described in the pre-mold removal drying process P2, the desiccant dehumidifier 3 passes the odor-removed air W1 through the regeneration passage 41 and dehumidification passage 42 to dehumidify and heat it, and then blows it out as dry air D3 from the exhaust duct 32 toward the designated surface R in the designated space S. This quickly dries the designated surface R that became wet during the painting process P5.

The coating method according to one embodiment of the present invention described above provides the following effects.

In this embodiment, at least during the paint drying process P6, the dehumidified and heated dry air D3 is directed toward the designated surface R in the designated space S using the desiccant dehumidifier 3, thereby reducing the humidity of the air near the designated surface R and accelerating the drying of the painted designated surface R. This allows for efficient drying of paint when painting the designated surface R located in the designated space S within the room 1.

In addition, in this embodiment, starting from the pre-painting drying process P4 before the painting process P5, dehumidified and heated dry air D3 is directed toward the designated surface R in the designated space S using a desiccant dehumidifier 3, so that the designated surface R is pre-dried before entering the painting process P5. This ensures that an appropriate amount of paint adheres to the designated surface R during the painting process P5. Furthermore, because the paint adhesion can be improved, peeling of the paint from the designated surface R can be suppressed for a long period of time even after the painting process P5.

In addition, in this embodiment, mold that has grown on the designated surface R before the painting process P5 is removed by the mold removal process P3. This has the effect of suppressing mold growth on the designated surface R after the painting process P5, and ultimately suppressing mold occurrence. Furthermore, by directing dehumidified and heated dry air D3 toward the designated surface R in the designated space S using a desiccant dehumidifier 3 from the time the mold removal process P3 is being performed until before the painting process P5 begins, the drying of the designated surface R that became wet during the mold removal process P3 is promoted. This allows workers to quickly dry the designated surface R that became wet during the mold removal process P3 and begin the next process, the painting process P5. Furthermore, this also prevents poor paint adhesion caused by painting the designated surface R while it is still wet during the painting process P5.

In addition, in this embodiment, from the start of the pre-mold removal drying process P2 before the mold removal process P3, dehumidified and heated dry air D3 is directed toward the specified surface R in the specified space S using a desiccant dehumidifier 3, thereby pre-drying the specified surface R before the mold removal process P3. This allows the chemicals used in the mold removal process P3 to be widely distributed, even to mold spores and hyphae that have developed on the specified surface R.

In addition, in this embodiment, an odor-absorbing filter 7 is installed on at least one of the inlet 33 and outlet 34 sides of the desiccant dehumidifier 3. This allows odors generated during the painting process P5 and mold removal process P3 to be absorbed. This allows the desiccant dehumidifier 3 to dry the specified surface R while also removing odors from the specified space S.

In addition, in this embodiment, a first filter 71 and a second filter 72 that adsorb odors are replaceably installed on at least one of the inlet 33 side and the outlet 34 side of the desiccant dehumidifier 3. The second filter 72 is installed at least during the pre-paint drying process P4. This allows it to adsorb odors generated during the mold removal process P3 and reliably remove odors from the specified space S. The first filter 71 is installed at least during the paint drying process P6. This allows it to adsorb odors generated during the painting process P5 and reliably remove odors from the specified space S. Therefore, since a filter 7 suitable for removing odors generated in each process can be used, odors generated in the specified space S in each process can be reliably removed.

In addition, in this embodiment, multiple filters 7 are installed in a vertical row on at least one of the inlet 33 side and outlet 34 side of the desiccant dehumidifier 3. As a result, air within the specified space passes through the multiple filters 7, and odors are adsorbed. This makes it possible to more reliably remove odors within the specified space S.

In addition, in this embodiment, before drying the specified surface R with the desiccant dehumidifier 3, the specified space S is surrounded by a protective sheet 8 from ceiling to floor, so that only the air W1 in the specified space S surrounded by the protective sheet 8 is efficiently dehumidified and heated. The protective sheet 8 also keeps odors generated during the painting process P5 and mold removal process P3 within the specified space S. This prevents odors from leaking outside the specified space S.

In addition, in this embodiment, the paint used in the painting process P5 is a paint with anti-mold properties, which prevents mold from re-adhering to the specified surface R after it is removed in the mold removal process P3. This makes it possible to prevent mold from growing for a long period of time even after painting.

The present invention has been described above based on the embodiments, but it is readily apparent that the present invention is in no way limited to the above embodiments, and that various improvements and modifications are possible without departing from the spirit of the present invention. For example, each embodiment may be modified by adding or replacing part or parts of the configuration of another embodiment, including the modifications described below. Furthermore, the numerical values given in the above embodiments are merely examples, and other numerical values can of course be adopted.

In the above embodiment, the specified surface R to be painted is located on the ceiling 21, but this is not limited to this and may also be located on the wall 22 or floor 23.

In addition, although the desiccant dehumidifier 3 is installed outside the room 1 in the above embodiment, it may also be installed inside the room 1. In this case, there is no need to provide an intake duct 31 and an exhaust duct 32; it is sufficient that the desiccant dehumidifier 3 is installed inside the room 1 so that the air outlet 34 faces the specified surface R of the specified space S.

In addition, in the above embodiment, the designated surface R is dried using the desiccant dehumidifier 3 during the pre-mold removal drying process P2, the pre-painting drying process P4, and the paint drying process P6. However, it is sufficient to efficiently dry the designated surface R at least after the painting process P5, and the desiccant dehumidifier 3 may be activated only during the paint drying process P6.

In addition, in the above embodiment, a second filter 72 is used to absorb the chlorine odor generated from the chemicals used in the mold removal process P3. However, if an odor other than the chlorine odor is generated in the mold removal process P3, a second filter 72 that absorbs the odor other than the chlorine odor may be used.

In addition, in the above embodiment, the first filter 71 is used to absorb the thinner odor emitted from the paint used in the painting process P5. However, if an odor other than the thinner odor is generated during the painting process P5, a first filter 71 that absorbs the odor other than the thinner odor may be used.

In addition, in the above embodiment, painting is performed using paint with anti-fungal properties in the painting process P5, but this is not limited to this. Even if painting is performed using paint with properties other than anti-fungal properties (for example, antibacterial properties), the specified surface R can be dried efficiently after painting.

Furthermore, the desiccant dehumidifier 3 in the above embodiment uses a hybrid system that combines a compressor system and a desiccant system, but this is not limited to this, and as long as it can dry the specified surface R, it may also be a dehumidifier that uses only the desiccant system.

In addition, in the desiccant dehumidifier 3 of the above embodiment, three filters 7 are installed at the suction port 33, but this is not limited to this and any number may be used. By installing multiple filters 7, the effectiveness of removing odors generated in the mold removal process P3 and the painting process P5 can be further improved.

In addition, in the desiccant dehumidifier 3 of the above embodiment, the filter 7 is installed on at least one of the suction port 33 side and the outlet port 34 side, but this is not limited to this, and the filter 7 may be installed on both the suction port 33 side and the outlet port 34 side. By installing the filter 7 on both the suction port 33 side and the outlet port 34 side, the effect of removing odors generated in the mold removal process P3 and the painting process P5 can be further improved.

1 Room 21 Ceiling 22 Wall 23 Floor 3 Desiccant dehumidifier 30 Main body 31 Intake duct 32 Exhaust duct 33 Intake port 34 Outlet 41 Regeneration passage 42 Dehumidification passage 50 Refrigeration cycle 51 Intake fan 52 Regeneration heater 53 Compressor 54 Cooler 55 Expansion valve 56 Reheat heater 6 Desiccant rotor 61 Adsorbent 6a Regeneration zone 6b Dehumidification zone 6c Boundary 6d Rotating shaft 7 Filter 8 Curing sheet P1 Curing process P2 Mold removal pre-drying process P3 Mold removal process P4 Pre-painting drying process P5 Painting process P6 Paint drying process

Claims (8)

a pre-painting drying process in which, before painting a predetermined paint on a predetermined surface in a predetermined indoor space, the air in the predetermined space is dehumidified and heated using a desiccant-type dehumidifier, and the dehumidified and heated air is directed toward the predetermined surface, thereby drying the surface to be painted;
a coating step of coating the predetermined surface with the predetermined paint ;
and a paint drying step of dehumidifying and heating the air in the specified space using the dehumidifier at least during and after the painting step, and directing the dehumidified and heated air toward the specified surface to dry the applied paint. a mold removal step of removing mold from the predetermined surface before the painting step;
2. The painting method according to claim 1, wherein the pre-painting drying process is carried out at least during the mold removal process until before the painting process, and the dehumidifier is used to dehumidify and heat the air in the specified space, and the dehumidified and heated air is directed toward the specified surface to dry the surface that became wet in the mold removal process. 3. The coating method according to claim 2, further comprising a pre-mold removal drying step in which, before the mold removal step , the dehumidifier is used to dehumidify and heat the air in the specified space, and the dehumidified and heated air is directed toward the specified surface, thereby drying the surface from which mold is to be removed. a painting process of painting a predetermined surface in a predetermined indoor space with a predetermined paint;
a paint drying process in which, at least during and after the painting process, the air in the specified space is dehumidified and heated using a desiccant-type dehumidifier, and the dehumidified and heated air is directed toward the specified surface, thereby drying the painted paint;
The dehumidifier is configured so that an odor-absorbing filter can be installed on at least one of the inlet side that draws in air from the specified space and the outlet side that blows out dehumidified and heated air. The dehumidifier is configured so that an odor-absorbing filter can be replaceably installed on at least one of an inlet side that draws in air from the specified space and an outlet side that blows out dehumidified and heated air,
a first filter for absorbing odors generated in the mold removal process is installed at least during the pre-painting drying process;
3. The coating method according to claim 2 , further comprising providing a second filter for absorbing odors generated during the coating process at least during the paint drying process. The coating method according to claim 4 or 5 , wherein the dehumidifier is configured so that a plurality of the filters can be installed in a tandem arrangement. 6. The coating method according to claim 1 , further comprising a curing step of surrounding the predetermined space from ceiling to floor with a curing sheet before drying with the dehumidifier. 3. The coating method according to claim 2 , wherein the predetermined paint used in the coating step is a paint having an antifungal effect.