JP2011200285A - Method and device for cleaning photocatalyst-coated exterior surface - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and a device for cleaning a photocatalyst-coated exterior surface capable of efficient cleaning by cleaning the photocatalyst-coated exterior surface by use of a self cleaning operation even when there is a cause of not exerting the self-cleaning operation such as no-irradiation with the sun shine (UV) or the shortage of rain water, thereby preventing the damage and separation of the photocatalyst coat caused by conventional cleaning means.SOLUTION: Cleaning range closing means 13 forms a closed space by enclosing the cleaning range of the photocatalyst-coated exterior surface W, and UV application means 15 for applying UV onto the exterior surface W when cleaning, thereby activating photocatalyst to weaken the adhesive force of adhering dirt. Water sprinkling means 18 sprinkles water so as to form a water film to wash away from a upside to a downside, thereby cleaning the exterior surface W. Then, air is blown, by draining and drying means 22, onto the cleaned surface W washed away with the water film to be drained and dried, thereby preventing dirt such as dust from adhering again. Moreover, water collection and circulation means 23 collects dirty water, removes the dirt with a filter, and circulates the water, thereby cleaning the exterior surface W with minimum water.

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for cleaning an exterior surface provided with a photocatalyst coat, and an exterior provided with a photocatalyst coat having a self-cleaning action in order to prevent contamination of an exterior wall of a structure such as a building or an exterior surface such as glass. The surface can be cleaned using a self-cleaning action.

  In recent years, it has been proposed to apply a photocatalyst coat having a self-cleaning action in order to prevent the outer wall of a structure such as a building or the exterior surface of glass or the like from being soiled, and a part of it has been put into practical use.

  Such a photocatalyst coat applied to the exterior surface uses a self-cleaning action by a chemical reaction of titanium dioxide. For example, when a photocatalyst coat is provided on a glass surface, it is activated on the surface of the photocatalyst when exposed to light (ultraviolet rays). Oxygen is generated, and the active oxygen decomposes the dirt adhering to the glass surface, weakens the adhesion, and the dirt with weak adhesion is washed away by rainwater, thereby enabling self-cleaning (Patent Document 1, etc.).

Therefore, there are several factors as a condition that the self-cleaning action is not exhibited.
First, if the dirt component is an inorganic substance, it cannot theoretically be decomposed, and in terms of not being exposed to sunlight (ultraviolet rays), no chemical reaction occurs, the effect is not exerted, rainwater is not applied, rainwater In the case where it is not possible to wash away with a small amount, it can be mentioned that the dirt becomes conversely severe.

JP-A-2005-320240 JP 2009-138125 A

  Because of these factors, the exterior surface with photocatalyst coating has the above factors as well as its durability and antifouling properties. I found out that there was a problem that I could not.

  On the other hand, when cleaning a glass surface by spraying a small amount of water onto the surface and scraping it off with a brush or spatula to collect the sewage and dirt, the photocatalyst coat on the glass surface is damaged or peeled off. There is a problem that the self-cleaning action cannot be exhibited.

  The present invention has been made in view of the above-mentioned problems of the prior art. Even if there is a factor that the self-cleaning action is not exerted such as no sunlight (ultraviolet rays) or little rainwater, the exterior surface is provided with a photocatalyst coat. By using the self-cleaning action, the photocatalyst coat can be prevented from being damaged or peeled off, and an exterior surface coated with the photocatalyst coat that can be efficiently cleaned and an apparatus therefor are provided. To do.

  In order to solve the above-mentioned problem, a method for cleaning an exterior surface provided with a photocatalyst coat according to claim 1 of the present invention defines a cleaning range on the exterior surface provided with a photocatalyst coat, and forms a closed space. After irradiating the exterior surface with ultraviolet rays, water is sprayed off to form a water film from the top to the bottom of the exterior surface, and air is blown to the exterior surface on which the water film is formed. After drying, the sprinkled water is collected and circulated, and then the closed space is moved and cleaned.

  According to a second aspect of the present invention, in addition to the structure of the first aspect, the exterior surface coated with the photocatalyst coat is configured to form a closed space by surrounding the cleaning range with an air cushion. It is characterized by.

  According to a third aspect of the present invention, in addition to the structure of the first or second aspect, the ultraviolet irradiation is performed by swinging a reflector provided around the ultraviolet lamp. It is characterized by the fact that it was done by

  According to a fourth aspect of the present invention, in addition to the structure according to any one of the first to third aspects, the method for cleaning the exterior surface provided with the photocatalyst coat swings the water spray that forms the water film. This is characterized in that it is made to perform.

  In addition to the structure in any one of Claims 1-4, the cleaning method of the exterior surface in which the photocatalyst coat of Claim 5 of this invention was given WHEREIN: The blowing of the said air and the collection | recovery of the sprinkling are blown It is characterized in that it is carried out using the intake / exhaust system of the means.

  According to a sixth aspect of the present invention, there is provided a cleaning device for an exterior surface provided with a photocatalyst coat, a cleaning range closing means for forming a closed space surrounding a cleaning range of the exterior surface provided with a photocatalyst coat, and the cleaning range blocking UV irradiation means for activating the photocatalyst coat by irradiating the exterior surface surrounded by the means with ultraviolet light, and watering and washing away so that a water film is formed on the exterior surface activated by the ultraviolet irradiation means. Sprinkling means, draining and drying means for blowing and drying air by blowing air on the exterior surface washed away by the sprinkling means, and collecting and circulating means for recovering and circulating the sprinkling water flowing down by the draining and drying means, Is provided in the main body of the cleaning device.

  According to a seventh aspect of the present invention, in addition to the structure according to the sixth aspect, the cleaning area closing means includes an air cushion provided around the main body of the cleaning apparatus. It is characterized by that.

  According to an eighth aspect of the present invention, there is provided an exterior surface cleaning apparatus to which the photocatalyst coat is applied, in addition to the configuration according to the sixth or seventh aspect, the ultraviolet irradiation means includes an ultraviolet lamp, a reflector provided around the ultraviolet lamp, And a swing mechanism for swinging the reflecting plate.

  According to a ninth aspect of the present invention, in the exterior surface cleaning device on which the photocatalyst coat is applied, in addition to the structure according to any of the sixth to eighth aspects, the watering means includes a water tank, a pump, and a watering nozzle. And a swing mechanism for swinging the watering nozzle.

  According to a tenth aspect of the present invention, an exterior surface cleaning device to which the photocatalyst coat is applied is configured to supply the draining and drying means and the sprinkling recovery and circulation means in addition to the structure according to any one of the sixth to ninth aspects. It is characterized in that it is configured to use the intake / exhaust system of the means.

  According to an eleventh aspect of the present invention, the exterior surface cleaning device to which the photocatalyst coat is applied is provided in a lifting mechanism that moves up and down the main body of the cleaning device, in addition to the configuration according to any one of the sixth to tenth aspects. The present invention is characterized in that it can be cleaned by repeatedly moving the cleaning range.

  According to a twelfth aspect of the present invention, in addition to the structure of any one of the sixth to eleventh aspects, the exterior device having a photocatalyst coat applied to the cleaning device body is provided. A CCD camera for monitoring the surface is provided.

According to the cleaning method of the exterior surface coated with the photocatalyst coat according to claim 1 of the present invention, a closed space is formed by defining a cleaning range on the exterior surface coated with the photocatalyst coat, and the exterior surface of the closed space is formed. After irradiating with UV light, water is washed off so that a water film is formed from the upper side to the lower side of the exterior surface, and then air is blown to the exterior surface on which the water film is formed to drain and dry. Since the sprinkled water is collected and circulated, and then the closed space is moved and cleaned, the exterior surface on which the photocatalyst coat is applied is irradiated with ultraviolet rays during cleaning, The photocatalyst is activated to weaken the adhesion force of the adhered dirt. In this state, the exterior surface can be cleaned by spraying water so as to form a water film and washing it downward from above. In addition, by spraying air onto a clean surface washed away with a water film to drain and dry, it is possible to prevent re-attachment of dirt such as dust to the exterior surface. Furthermore, the water used for watering can be collected (removed with a filter or the like) and circulated for use, thereby minimizing the water required for cleaning. In addition, the entire range that needs to be cleaned can be cleaned by moving the cleaning surface that defines the cleaning range as the closed space.
As a result, even if there is a factor that the self-cleaning action is not exhibited, such as no sunlight (ultraviolet light) or little rain water, the self-cleaning action is applied to the exterior surface that is irradiated with ultraviolet light during cleaning. The photocatalyst coat can be prevented from being damaged or peeled off, and can be efficiently cleaned.

  According to the cleaning method of the exterior surface to which the photocatalyst coat is applied according to the second aspect of the present invention, since the periphery of the cleaning range is surrounded by the air cushion so as to form the closed space, the cleaning is performed using the air cushion. It is possible to easily create a closed space for setting a range, and it is possible to clean by preventing the scattering of dirt and water.

  According to the cleaning method of the exterior surface provided with the photocatalyst coat according to claim 3 of the present invention, the ultraviolet irradiation is performed by swinging a reflector provided around the ultraviolet lamp. The reflecting plate can irradiate ultraviolet rays from the ultraviolet lamp over a wide range, and can be cleaned efficiently.

  According to the cleaning method of the exterior surface to which the photocatalyst coat is applied according to the fourth aspect of the present invention, the watering for forming the water film is performed by swinging the watering nozzle. A water film can be formed by sprinkling water from the nozzle, and a water film can be formed with a minimum amount of water for efficient cleaning.

  According to the cleaning method of the exterior surface provided with the photocatalyst coat according to claim 5 of the present invention, the blowing of the air and the recovery of the water spray are performed using an intake / exhaust system of a blowing means. Therefore, the air can be blown by the exhaust system of the air blowing means, and the water spray can be collected by the air intake system of the air blowing means, so that the air can be cleaned by one air blowing means.

According to the cleaning device for the exterior surface coated with the photocatalyst coat according to claim 6 of the present invention, the cleaning range closing means for forming the closed space surrounding the cleaning range of the exterior surface coated with the photocatalyst coat, and the cleaning Ultraviolet irradiation means for activating the photocatalyst coat by irradiating the exterior surface surrounded by the range blocking means with water, and spraying water so that a water film is formed on the exterior surface activated by the ultraviolet irradiation means. Sprinkling means for washing away, draining means for blowing and drying air by blowing air on the exterior surface washed away by the sprinkling means, and sprinkling recovery circulating means for collecting and circulating the water sprinkled down by the draining drying means Is provided in the cleaning device main body, so that a closed space can be formed surrounding the cleaning range of the exterior surface coated with the photocatalyst coat by the cleaning range closing means. By irradiating the exterior surface with ultraviolet rays when cleaning with ultraviolet irradiation means, the photocatalyst can be activated to weaken the adherence of attached dirt, and in this state water spray is formed so as to form a water film with watering means. Then, the exterior surface can be cleaned by washing from the top to the bottom. In addition, by spraying air with a draining and drying means on the clean surface washed away with the water film to drain and dry, it is possible to prevent reattachment of dirt such as dust to the exterior surface. Furthermore, the water required for cleaning can be minimized by recovering the water used for watering by the watering recovery and circulation means (removing dirt with a filter or the like) and using it by circulation.
As a result, even if there is a factor that the self-cleaning action is not exhibited, such as no sunlight (ultraviolet light) or little rain water, the self-cleaning action is applied to the exterior surface that is irradiated with ultraviolet light during cleaning. The photocatalyst coat can be prevented from being damaged or peeled off, and can be efficiently cleaned.

  According to the cleaning device for an exterior surface provided with the photocatalyst coat according to claim 7 of the present invention, the cleaning range closing means is constituted by an air cushion provided around the cleaning device main body, and thus constituted by an air cushion. The closed space where the cleaning range is set can be easily created by the cleaning range blocking means, and cleaning can be performed while preventing scattering of dirt and water.

  According to the cleaning device for an exterior surface to which the photocatalyst coat is applied according to the eighth aspect of the present invention, the ultraviolet irradiating means includes an ultraviolet lamp, a reflector provided around the ultraviolet lamp, and a rocker that swings the reflector. Since the moving mechanism is used, the oscillating reflector can irradiate ultraviolet rays from the ultraviolet lamp over a wide range and can be efficiently cleaned.

  According to the cleaning device for an exterior surface provided with the photocatalyst coat according to claim 9 of the present invention, the watering means includes a water tank, a pump, a watering nozzle, and a swing mechanism for swinging the watering nozzle. Therefore, a water film can be formed by supplying water from the water tank and the pump to the watering nozzle of the watering means swung by the rocking mechanism, and water can be formed. A film can be formed for efficient cleaning.

  According to the exterior surface cleaning device to which the photocatalyst coat is applied according to claim 10 of the present invention, the draining and drying means and the sprinkling / recovery circulation means are configured to perform using the intake / exhaust system of the blower means. Therefore, the draining and drying means for blowing air is performed in the exhaust system of the air blowing means, and the water spray collecting and circulating means for collecting the water spray is performed in the air intake system of the air blowing means. And can be cleaned with a compact device.

  According to the cleaning device for the exterior surface to which the photocatalyst coat is applied according to claim 11 of the present invention, the cleaning device body is configured to be provided with a lifting mechanism that moves up and down, and can be cleaned by repeatedly moving the cleaning range. Therefore, by changing the raising / lowering position, it is possible to perform cleaning while moving the cleaning surface that defines the cleaning range and forms the closed space, and the entire range that needs to be cleaned can be cleaned by the raising / lowering movement.

  According to the cleaning device for the exterior surface coated with the photocatalyst coat according to claim 12 of the present invention, the cleaning device body is provided with a CCD camera for monitoring the exterior surface coated with the photocatalyst coat. By monitoring with a CCD camera, the state of the exterior surface can be monitored simultaneously with cleaning.

It is a schematic sectional side view before the operation | work concerning one Embodiment of the cleaning apparatus of the exterior surface by which the photocatalyst coating of this invention was given. It is a schematic sectional side view of the working state concerning one Embodiment of the cleaning apparatus of the exterior surface where the photocatalyst coat of this invention was given. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view, a plan sectional view, and a right sectional view according to an embodiment of an exterior surface cleaning apparatus to which a photocatalyst coat of the present invention is applied.

Hereinafter, an embodiment of an exterior surface cleaning device to which a photocatalyst coat of the present invention is applied will be described in detail with reference to the accompanying drawings.
In cleaning the exterior surface coated with the photocatalyst coat, the exterior surface W such as a window glass coated with the photocatalyst coat is irradiated with ultraviolet rays for cleaning, and the photocatalyst is activated to increase the adhesion of the adhered dirt. Wet, wash and spray to form a water film, and then drain and dry to prevent dirt from adhering again. Unlike scraping off with a spatula, cleaning is performed using a photocatalyst coat on the exterior surface.

  The exterior surface cleaning device 1 on which a photocatalyst coat for performing such a cleaning method is provided includes a cleaning device body 10 on which various means and devices necessary for cleaning are mounted, and a surface to be cleaned such as a window glass. It is comprised in the rectangular box shape which the front which opposes the exterior surface W which is is opened.

Although not shown in the drawings, the main body 10 of the cleaning device is suspended through a suspension wire 11 constituting a lifting mechanism composed of a winding device provided on a roof car installed on the roof of a structure. It can be moved up and down by winding and rewinding.
Further, the cleaning device body 10 is provided with guide mechanisms 12 for guiding along the guide rails that are installed in advance on the exterior surface that is the surface to be cleaned at the four corners of the opening, and the traveling wheels whose horizontal rotation axes are orthogonal to each other. In combination with the guide wheels, the front and rear guides in the direction of approaching and separating from the left and right sides of the up and down direction and the exterior surface W can be formed.

  In addition, as a raising / lowering mechanism of the cleaning apparatus main body, it can be a mechanism that winds around a winder (endless winding device) provided in the cleaning apparatus main body and moves up and down while moving the winding position. A traversing mechanism that enables movement can also be provided in combination. In addition to using a guide rail installed in advance, the guide mechanism may be a mechanism that supports the guide or the cleaning device body by mounting a vacuum suction pad or the like on the cleaning device body and moving the suction position. it can.

In the cleaning device body 10 that is moved up and down in this manner, an air cushion 14 is provided as a cleaning range closing means 13 for forming a space (blocking space) that surrounds the cleaning range for one time and is closed. It is attached around the opening.
The air cushion 14 is inflated by supplying air to the inside of the hollow body so that the space between the exterior surface W and the cleaning device main body 10 is hermetically sealed, and is contracted by discharging air to be contracted. A space is secured between the main body 10 and the body 10 to be movable. The air cushion 14 may be either one having four air chambers arranged at one side, or one having air chambers divided for each side.

In order to clean in the closed space surrounded by such an air cushion 14, the cleaning apparatus body 10 has a bar-shaped ultraviolet lamp 16 disposed horizontally as the ultraviolet irradiation means 15, and two are arranged vertically. A reflecting plate 17 is provided which covers the outside of the ultraviolet lamp 16 and has an irradiation opening 17a formed on the side surface of the cylindrical body. The reflecting plate 17 includes a swinging mechanism (not shown), and swings the reflecting plate 17 around the horizontal axis to irradiate ultraviolet rays from the irradiation opening 17a in a wide range in the vertical direction, 16 can irradiate the entire cleaning range for one time with ultraviolet rays.
By irradiating ultraviolet rays onto the exterior surface W coated with the photocatalyst by the ultraviolet lamp 16 of the ultraviolet irradiation means 15, the photocatalyst is activated and soiled even on the exterior surface W where the sunlight (ultraviolet rays) did not hit. Can weaken the adhesion.

The cleaning device main body 10 is equipped with watering means 18 for spraying water so as to form a water film on the exterior surface W activated by the ultraviolet irradiation means 15 to wash away dirt, and a plurality of watering nozzles are disposed on a horizontal watering pipe 19. 20 is attached so that water can be sprayed over the entire width of the cleaning range for one time. Further, the water spray pipe 19 is provided with a swing mechanism (not shown), and the water spray nozzle 20 can be directed vertically by swinging the water spray pipe 19 around the horizontal axis via the swing pipe 21. Thus, the dirt can be washed away by spraying water so that a water film is formed from above to below.
Therefore, the amount of water sprayed by the water spraying means 18 may be determined so as to ensure a state in which dirt that adheres to the exterior surface W and has weakened adhesion can be washed away.
The watering means 18 is provided with a water tank and a pump. The water from the water tank is pressurized by the pump so that the water can be sprinkled from the watering nozzle 20, and the water after the watering is collected as will be described later. Recirculate.

In order to prevent dirt and the like from reattaching to the exterior surface W from which dirt has been washed away by drying and drying, a draining and drying means 22 is provided in the cleaning device main body 10.
Further, the cleaning device main body 10 is provided with a water sprinkling / recovering circulation means 23 for collecting the water sprinkled by the water draining / drying means 22 and circulating it. Here, the water draining / drying means 22 and the water sprinkling recovery are provided. The circulation means 23 is configured to use one air blowing means 24 by using the air intake system of the air blowing means 24 for collecting water spray and the exhaust system for drying.

That is, an air blower 25 is installed as the air blowing means 24, and an exhaust duct 26 and an intake duct 27 are connected to the exhaust side and the suction side of the exhaust side, respectively, and an extendable portion that can expand and contract with respect to the exterior surface W is provided. It is arranged so that it can be approached or separated so as to be in contact with the exterior surface W.
An air outlet 26a is formed at the tip of the exhaust duct 26 along the upper edge of the cleaning range for one time, and an upper squeegee 28 such as rubber is attached to the upper portion of the air outlet 26a. It is applied to the surface W to be in a sealed state, and air is blown so that draining and drying can be performed.
Similarly, a suction port 27a is formed at the tip of the intake duct 27 along the lower edge of the cleaning range for one time, and a lower squeegee 29 such as rubber is attached to the lower portion of the suction port 27a. The outer surface W is sealed so that sewage can be collected without leaking into the suction port 27a, and a drip-proof filter 27b is interposed in the middle of the intake duct 27 to separate dirt from sewage. The gas is sucked into the air blower 25 so that the water can be returned to the water tank.

  Further, the cleaning device main body 10 is provided with a CCD camera 30 so that the exterior surface W can be monitored. For example, by attaching the CCD cameras 30 and 30 to the reflection plates 17 and 17, respectively, the ultraviolet irradiation means 15 is shaken. The entire exterior surface W can be monitored using a moving mechanism.

Next, the cleaning method will be described together with the operation of the exterior surface cleaning device 1 on which the photocatalyst coat thus configured is applied.
First, the cleaning device body 10 is moved up and down by being guided by the guide mechanism 12 via the suspension wire 11 constituting the lifting mechanism to a position where the cleaning device main body 10 is in the first cleaning range (see FIG. 1).

After moving the cleaning device main body 10, in order to make the cleaning range a closed space, air is supplied to the air cushion 14 of the cleaning range closing means 13 to swell, so that the exterior surface W and the opening of the cleaning device main body 10 are expanded. The space is closed (see FIG. 2).
Further, the exhaust duct 26 and the intake duct 27 constituting the draining and drying means 22 and the sprinkling recovery means 23 are extended by the expansion / contraction part, and the upper squeegee 28 and the lower squeegee 29 are brought into contact with the upper and lower edges of the exterior surface W. Let it be in a sealed state.

After the preparation for cleaning is completed in this way, as the start of cleaning, first, the ultraviolet lamps 16 and 16 of the ultraviolet irradiation means 15 are turned on, and the reflection plates 17 and 17 are moved to the irradiation openings 17a and 17a via the swing mechanism. The entire exterior surface W is irradiated with ultraviolet rays by rotating in the vertical direction.
This ultraviolet irradiation may be set so that the exterior surface W coated with the photocatalyst coat is activated and the adhesion of dirt is weakened. The ultraviolet lamps 16 and 16 have a size and capacity, a dirt state on the exterior surface W, and the like. Set it accordingly.

Next, water is sprayed from the water spray nozzle 20 at the tip of the water spray pipe 19 of the water spray means 18 of the cleaning device main body 10 to the exterior surface W whose adhesion of dirt has been weakened by the irradiation of ultraviolet rays, and the rocking pipe 21 is swung into the rocking mechanism. The water film is formed from above to below to wash away dirt on the exterior surface W (see FIG. 2).
The air blower 25 of the blower 24 that also serves as the draining and drying means 22 and the sprinkling recovery means 23 is operated continuously with the water spraying, and air for draining and drying is discharged from the outlet 26a of the exhaust duct 26 at the upper end of the exterior surface W. Water is drained by blowing, and sewage is collected from the suction port 27a of the intake duct 27 at the lower end of the exterior surface W.
The recovered sewage is separated into dirt and other foreign substances, gas components and moisture by a drip-proof filter 27b in the middle of the intake duct 27, and the moisture is returned to the water tank of the sprinkling means 18 for circulation. The air, which is a gas component, is sucked into the air blower 25, and the foreign matter is taken out and discarded.

  After the cleaning of the exterior surface W for one cleaning set as the closed space is completed, the air in the air cushion 14 of the cleaning range closing means 13 for setting the cleaning range as the closed space is discharged and contracted. A space is formed between the exterior surface W and the opening of the cleaning device main body 10, and the exhaust duct 26 and the intake duct 27 constituting the draining and drying means 22 and the sprinkling recovery means 23 are contracted by the expansion and contraction parts so that the upper squeegee 28. Further, the lower squeegee 29 is in a retracted state in which it is pulled back from the exterior surface W.

  Thereafter, the cleaning device body 10 is moved up and down by being guided by the guide mechanism 12 via the suspension wire 11 constituting the lifting mechanism to a position where the cleaning device body 10 is to be cleaned next time, and preparation for cleaning is performed again. By repeating this and all the steps for cleaning, cleaning is completed by cleaning the entire exterior surface W.

  In addition, the movement of the cleaning apparatus main body 10 can be efficiently moved and cleaned in a short time by combining not only the lifting mechanism but also the traversing mechanism.

As described above in detail with the embodiment, according to the cleaning method for the exterior surface coated with the photocatalyst coat, the exterior surface W coated with the photocatalyst coat is irradiated with ultraviolet rays during cleaning. Thus, the adhesion of dirt adhered by activating the photocatalyst can be weakened, and in this state, the exterior surface W can be cleaned by sprinkling water so as to form a water film and washing down from above. Further, by blowing air to the clean surface washed away with the water film and draining and drying, it is possible to prevent reattachment of dirt such as dust to the exterior surface W. Furthermore, the water required for cleaning can be minimized by collecting the water used for sprinkling, removing the dirt with a filter and circulating it. Further, by defining the cleaning range and performing the cleaning while moving the cleaning surface as a closed space, it is possible to prevent the scattering of dirt and sewage and efficiently clean the entire range that needs to be cleaned.
As a result, even if there is a factor that the self-cleaning action is not exerted such as no sunlight (ultraviolet light) or little rain water, the self-cleaning of the exterior surface W on which the photocatalyst coat is applied by irradiating the ultraviolet light during cleaning The action can be used for cleaning, and the photocatalyst coat can be prevented from being damaged or peeled off, and can be efficiently cleaned.

  Further, according to the cleaning method of the exterior surface to which the photocatalyst coat is applied, the closed space is formed by surrounding the cleaning range with the air cushion 14, so that the closed space for setting the cleaning range is easily created. It can be cleaned by preventing the scattering of dirt and water.

  Further, according to the cleaning method of the exterior surface provided with the photocatalyst coat, the ultraviolet irradiation is performed by swinging the reflecting plate provided around the ultraviolet lamp. Ultraviolet rays from the lamp 16 can be irradiated over a wide range, and cleaning can be performed efficiently.

  In addition, according to the cleaning method of the exterior surface to which the photocatalyst coat is applied, the watering for forming the water film is performed by swinging the watering nozzle 20. A water film can be formed using a limited amount of water for efficient cleaning.

  Furthermore, according to the cleaning method of the exterior surface to which the photocatalyst coat is applied, since the blowing of air and the collection of water spray are performed using the intake / exhaust systems 26 and 27 of the blowing means 24, The basic air blowing means 24 can be cleaned by blowing air and collecting water.

Moreover, according to the cleaning device 1 for the exterior surface to which the photocatalyst coat is applied, a closed space can be formed by surrounding the cleaning range of the exterior surface W to which the photocatalyst coat has been applied by the cleaning range closing means 13. By irradiating the coated exterior surface W with ultraviolet rays at the time of cleaning by the ultraviolet irradiation means 15, the photocatalyst can be activated to weaken the adherence of the adhered dirt. The exterior surface W can be cleaned by spraying water so as to form a film and washing it downward from above. In addition, by spraying air on the clean surface W washed away with the water film by the draining and drying means 22 to drain and dry, it is possible to prevent reattachment of dirt such as dust to the exterior surface W. Furthermore, the water required for cleaning can be minimized by recovering the water used for sprinkling with the sprinkling / recovery circulation means 23, removing the dirt with a filter and circulating it.
As a result, even if there is a factor that the self-cleaning action is not exerted such as no sunlight (ultraviolet light) or little rain water, the self-cleaning of the exterior surface W on which the photocatalyst coat is applied by irradiating the ultraviolet light during cleaning The action can be used for cleaning, and the photocatalyst coat can be prevented from being damaged or peeled off, and can be efficiently cleaned.

  Further, according to the exterior surface cleaning device 1 to which the photocatalyst coat is applied, the cleaning range closing means 13 is constituted by the air cushion 14 provided around the cleaning device main body 10. The closed space to be set can be easily created, and it can be cleaned while preventing scattering of dirt and water.

  Further, according to the exterior surface cleaning device 1 to which the photocatalyst coat is applied, the ultraviolet irradiation means 15 is provided with an ultraviolet lamp 16, a reflection plate 17 provided around the ultraviolet lamp 16, and a swinging movement that swings the reflection plate 17. Since it comprises the mechanism, it can irradiate ultraviolet rays over a wide range and can be cleaned efficiently.

  Further, according to the exterior surface cleaning device 1 to which the photocatalyst coat is applied, the watering means 18 is composed of a water tank, a pump, a watering nozzle 19, and a swinging mechanism for swinging the watering nozzle 19. Therefore, the water film can be efficiently formed on the exterior surface W, and the water film can be formed and cleaned with a minimum amount of water.

  Further, according to the exterior surface cleaning device 1 to which the photocatalyst coat is applied, the draining and drying means 22 and the sprinkling recovery and circulation means 23 are configured to be performed using the intake and exhaust systems 26 and 27 of the blower means 24. Therefore, it is possible to perform draining and drying and collecting water spray with a single air blowing means 24, and it is possible to clean with a compact device.

  Further, according to the exterior surface cleaning device 1 to which the photocatalyst coat is applied, the cleaning device main body 10 is configured to be provided with a lifting mechanism that moves up and down, and can be cleaned by repeatedly moving the cleaning range. By changing the position, cleaning can be performed while moving the exterior surface that defines the cleaning range and forms the closed space, and the entire range that needs to be cleaned can be efficiently cleaned by the up-and-down movement.

Also, according to the exterior surface cleaning device 1 to which the photocatalyst coat is applied, the cleaning device body 10 is provided with the CCD camera 30 for monitoring the exterior surface W to which the photocatalyst coat is applied. It is possible to monitor the state of each device and the cleaning state of the exterior surface.
In addition, in the said embodiment, although the case where the window glass of the structure was made into the exterior surface was demonstrated to the example, it is not limited to this, but it applies widely to cleaning of the exterior surface where photocatalyst coating other than the window glass was given. Can do.

DESCRIPTION OF SYMBOLS 1 Cleaning device 10 of exterior surface provided with photocatalyst coat Cleaning device main body 11 Hanging wire (lifting mechanism)
12 Guide mechanism 13 Cleaning range blocking means 14 Air cushion 15 Ultraviolet irradiation means 16 Ultraviolet lamp 17 Reflecting plate 17a Irradiation opening 18 Sprinkling means 19 Sprinkling pipe 20 Sprinkling nozzle 21 Swing pipe (swinging mechanism)
22 Draining and drying means 23 Sprinkling recovery means 24 Blowing means 25 Air blower 26 Exhaust duct (exhaust system)
26a Air outlet 27 Intake duct (intake system)
27a Suction port 27b Drip-proof filter 28 Upper squeegee 29 Lower squeegee 30 CCD camera

Claims (12)

A closed space is defined by defining a cleaning range on the exterior surface on which the photocatalyst coat is applied,
After irradiating the exterior surface of the enclosed space with ultraviolet rays,
Sprinkle water so that a water film is formed from the top to the bottom of the exterior surface.
Air is blown to the exterior surface on which the water film is formed, drained and dried, and then the sprinkled water is collected and circulated.
Next, a method for cleaning an exterior surface provided with a photocatalyst coat is characterized in that the closed space is moved for cleaning.   2. The method for cleaning an exterior surface provided with a photocatalyst coat according to claim 1, wherein a closed space is formed by surrounding the cleaning range with an air cushion.   3. The method for cleaning an exterior surface provided with a photocatalyst coat according to claim 1, wherein the ultraviolet irradiation is performed by swinging a reflector provided around an ultraviolet lamp.   The method for cleaning an exterior surface provided with a photocatalyst coat according to any one of claims 1 to 3, wherein the water spray forming the water film is performed by swinging a water spray nozzle.   The exterior coated with the photocatalyst coat according to any one of claims 1 to 4, wherein the air is sprayed and the water spray is collected using an intake / exhaust system of an air blowing means. How to clean the surface. A cleaning range closing means for forming a closed space surrounding the cleaning range of the exterior surface to which the photocatalyst coat has been applied;
UV irradiation means for activating the photocatalyst coat by irradiating the exterior surface surrounded by the cleaning range blocking means with ultraviolet rays;
Sprinkling means for sprinkling and washing so that a water film is formed on the exterior surface activated by the ultraviolet irradiation means,
Draining and drying means for spraying and drying air by blowing air on the exterior surface washed away by the watering means,
A cleaning device for an exterior surface to which a photocatalyst coat is applied, characterized in that the cleaning device main body is provided with a sprinkling recovery circulation means for collecting and circulating the sprinkling water flowing down by the draining and drying means.   The cleaning device for an exterior surface provided with a photocatalyst coat according to claim 6, wherein the cleaning range closing means is constituted by an air cushion provided around the cleaning device main body.   The photocatalyst coat according to claim 6 or 7, wherein the ultraviolet irradiation means comprises an ultraviolet lamp, a reflector provided around the ultraviolet lamp, and a swing mechanism for swinging the reflector. Cleaning device for the exterior surface.   The photocatalyst coat according to any one of claims 6 to 8, wherein the watering means comprises a water tank, a pump, a watering nozzle, and a rocking mechanism for rocking the watering nozzle. Cleaning device for the exterior surface.   The exterior coated with a photocatalyst coat according to any one of claims 6 to 9, wherein the draining and drying means and the water sprinkling / recovery means are configured to use an intake / exhaust system of an air blowing means. Surface cleaning device.   The photocatalyst coat according to any one of claims 6 to 10, wherein the cleaning device main body is provided with an elevating mechanism that moves up and down, and is configured to be able to be cleaned by repeatedly moving the cleaning range. Exterior surface cleaning device.   12. The exterior surface coated with a photocatalyst coat according to any one of claims 6 to 11, wherein the cleaning device main body is provided with a CCD camera for monitoring the exterior surface coated with the photocatalyst coat. Cleaning device.

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