JPH11300214A - Instrument provided with photocatalytic film on sheathing, its production and inspection method for instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and surely distinguish whether a photocatalytic film is provided on the sheathing of an instrument. SOLUTION: Character printing parts 11, 12, 13 are provided on the back face of a titania layer having translucency. In these character printing parts 11, 12, 13, it is shown by a direct or indirect language that a photocatalytic film is provided. Then, in the case of looking at the contour 21 of a complete instrument, these character printing parts 11, 12, 13 are visibly confirmed through the titania layer having translucency. Thereby, it is easily and surely distinguished that the titania layer is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to the decomposition of oil, tobacco tar, NOx, SOx, etc. by a strong action of decomposing organic substances, antifouling property, deodorant property, antibacterial property, or superhydrophilicity of the surface. TECHNICAL FIELD The present invention relates to a device provided with a photocatalytic film having various effects such as anti-fogging property and self-cleaning property using an exterior on an exterior, a manufacturing method thereof, and a method of inspecting the device. In particular, the equipment here refers to rice cookers, air conditioners, microwave ovens, gas ranges, pots, remote controllers (remote control devices),
In addition to a mirror, a television screen, a display screen of a personal computer or a word processor, a window glass, an outer wall, and the like are included.

[0002]

Conventionally, as a device provided with this kind of photocatalytic film on the exterior, an anatase type titanium oxide powder layer having a photocatalytic action (hereinafter simply referred to as a titania layer) is formed on the surface of a resin sheet. In addition, there is known a resin sheet having a titania layer provided on an outer shell of a device so as to improve antifouling property and dirt removal property. These photocatalyst films not only have antifouling properties, but also have properties such as deodorant properties, superhydrophilicity, and antibacterial properties. In recent years, they have been used in a variety of applications. In the case of using the device, it is a problem to provide the device on the outer surface while taking advantage of the characteristics of the outer surface of the device. The film thickness is formed to be 1 μm or less so as to have translucency.

However, since the photocatalyst film is formed to have a thickness enough to transmit light, it is not easy to determine whether or not the photocatalyst film is formed when actually looking at the outer shell of the device. There's a problem. Also, even if a photocatalytic film is formed, it is difficult for a third party to understand the specific effect of the photocatalytic action without knowing it, and it is difficult to understand why forming a photocatalytic film increases the cost. There's a problem. Also,
The same may occur at the time of manufacture, and there is a problem that it is not easy to determine whether a photocatalytic film is formed on a member processed into a predetermined shape.

Further, when the photocatalytic film is provided on the exterior of equipment used indoors, there is a problem that the intensity of the ultraviolet light applied to the exterior is insufficient, and it is difficult to obtain the effect peculiar to the photocatalysis. To achieve the effect by photocatalysis, usually 3
Ultraviolet light intensity of mW / cm ² or more is required, and it is required that outdoor equipment and indoor equipment be used in a place where light is easily supplied from a window. In addition, in the areas where light does not hit and the areas where light does not hit, only the light hits exert the effect of photocatalysis.For example, if a photocatalytic film is applied to the wall of the smoking room, the area where light is easily exposed from the window, fluorescent light, etc. However, the tobacco tar does not adhere to portions exposed to relatively strong ultraviolet rays, while the tobacco tar adheres to other portions, causing unevenness on the wall surface, and rather deteriorating appearance. Therefore, especially for equipment used indoors, the cover is used to reliably hit the light from the lighting equipment, and is used to prevent fogging of the mirror using super-hydrophilicity, but when used in areas where light is difficult to hit In addition, complicated measures such as incorporating an ultraviolet lamp as a light source in a device to obtain photocatalytic activity are forced, and the range of use is extremely limited.

Accordingly, the present invention has been made in view of the above problems, and has provided a device provided with a photocatalyst film on an exterior that can easily and surely identify whether or not a photocatalyst film is provided, a method of manufacturing the device, and a method of inspecting the device. Provide a common purpose.

Further, a first object of the present invention is to provide a photocatalyst film on the exterior which enables a third party to fully understand the effects of the photocatalyst and to use the photocatalyst, and which facilitates management during processing and distribution. To provide equipment.

It is a second object of the present invention to provide a method of manufacturing an apparatus having a photocatalyst film provided on its exterior, which facilitates management during processing and distribution.

A third object of the present invention is to make it possible to effectively utilize the photocatalytic action of equipment used indoors, to allow a third party to fully understand the effects of the photocatalyst, and to use the photocatalyst during processing. Another object of the present invention is to provide a method for inspecting a device provided with a photocatalyst film on an exterior thereof, which facilitates management during physical distribution.

[0009]

According to a first aspect of the present invention, there is provided an apparatus provided with a photocatalyst film on an exterior, wherein the photocatalyst film having translucency is provided on the exterior in order to achieve the first object. In the apparatus, a printing unit is provided at a position corresponding to the photocatalyst film to indicate that a photocatalyst film is provided.

According to the first aspect of the present invention, the photocatalytic film having a light-transmitting property is provided on the exterior of the device, so that the photocatalytic film is formed on the exterior while taking advantage of characteristics unique to the model of the device. In addition, when the exterior of the completed device is viewed, the printed portion that can be visually recognized through the transparent photocatalyst film makes it possible to easily and reliably identify that the photocatalyst film is provided there. Also, by looking at the printed portion, a third party can easily know the effect of the photocatalyst, and it is easy to understand that the reason for the high cost of the equipment is due to the formation of the photocatalyst film.

Further, even when processing an apparatus, it is possible to easily determine whether or not a photocatalytic film is formed on a member processed into a predetermined shape, thereby improving workability. Also, at the time of the component acceptance inspection, if the term is printed by the printing unit, it can be confirmed that the photocatalytic film is formed on the spot. That is, the identification of the photocatalyst film by the printing unit is facilitated, so that the management at the time of assembling and the management at the time of distribution are facilitated.

According to a second aspect of the present invention, there is provided an apparatus provided with a photocatalyst film on an exterior, wherein a transparent window portion having a light transmitting property is provided at a predetermined position of the exterior in addition to the constitution of the first aspect. The photocatalyst film having hydrophilicity is formed on a surface of the portion inside the device.

According to the second aspect of the present invention, the contact angle of the photocatalyst film with water is about 30 °, which is high hydrophilicity, so that the water adhering to the photocatalyst film does not form water droplets but becomes wet. The light transmittance through the transparent window hardly deteriorates. Further, when the photocatalyst film is irradiated with ultraviolet light through the transparent window, the contact angle becomes about 10 °, the hydrophilicity is further improved, the wettability is further increased, and good antifogging property is obtained. Therefore, even if moisture adheres to the inner surface of the transparent window,
Due to the anti-fogging property of the photocatalytic film, the display inside can be confirmed well through the transparent window, and the fogging phenomenon on the inner surface of the transparent window can be prevented, so that a device with good visibility can be provided.

According to a third aspect of the present invention, there is provided an apparatus having a photocatalytic film provided on an exterior thereof, wherein a heating means is provided inside the apparatus in addition to the configuration of the second aspect.

According to the third aspect of the present invention, the temperature difference between the internal atmosphere of the device and the transparent window is enlarged, and the water easily adheres to the inside of the transparent window. Due to the hydrophilicity, the attached water does not become water droplets, and the effect of the antifogging property can be more effectively utilized.

According to a fourth aspect of the present invention, there is provided an apparatus having a photocatalyst film provided on an exterior thereof, in addition to the configuration of the second aspect, further comprising a vapor generation source inside the apparatus.

According to the configuration of the fourth aspect, the possibility that moisture adheres to the inner surface of the transparent window increases, but even if moisture adheres slightly, the fogging phenomenon of the inner surface of the transparent window can be prevented. The anti-fog effect can be used more effectively,
Practicality can be ensured.

According to a fifth aspect of the present invention, there is provided an apparatus having the photocatalyst film provided on the exterior thereof, wherein the photocatalyst film is provided inside the apparatus in opposition to the transparent window. Is provided with an indicator for displaying the operating state of the device.

According to the structure of the fifth aspect, a good view can be secured by the hydrophilicity of the photocatalytic film even in a situation where moisture adheres slightly to the inner surface of the transparent window in daily use.

According to a sixth aspect of the present invention, there is provided an apparatus provided with a photocatalyst film on an exterior, wherein the display is a liquid crystal display in addition to the configuration of the fifth aspect.

According to the structure of claim 6, even in a situation where moisture adheres slightly to the inner surface of the transparent window in daily use, good visibility is ensured by the hydrophilicity of the titania layer,
Since the display can be performed by reflecting the light from the transparent window portion, it is possible to eliminate a factor of lowering the visibility of the liquid crystal display.

According to a seventh aspect of the present invention, there is provided an apparatus provided with a photocatalyst film on an exterior according to the seventh aspect of the present invention, in addition to the configuration of any one of the second to sixth aspects, wherein the transparent window portion has a closed part formed inside the equipment. It is characterized by being opposed to a space.

According to this configuration, even in a situation where the inside of the device is warm and the ambient temperature of the device is low in the environment in which the device is used, the moisture contained in the air in the closed space can remove the moisture contained in the air in the transparent window. Dew condensation on the inner surface can be prevented. In particular, in the case where a heating means is provided inside the apparatus or the apparatus has a steam generation source, the temperature inside the main body becomes high, so that dew condensation easily occurs on the inner surface of the transparent window. Further, if the transparent window is condensed and fogged, the display becomes less visible from the outside, and the visibility is significantly reduced, especially in a liquid crystal display which reflects light from external light to view the display. However, the photocatalytic film provided on the inner surface of the transparent window can eliminate such a problem even when the transparent window faces the closed space.

According to an eighth aspect of the present invention, in addition to the configuration of the seventh aspect, the device having the photocatalyst film provided on the exterior thereof includes the closed space in a lid of the device, and the display device is provided in the closed space. It is provided.

Since the transparent window is provided on the upper surface side of the device having the display on the lid of the device, the moisture in the closed space is easily condensed on the inner surface of the transparent window. However, according to the configuration of the eighth aspect, dew condensation can be prevented by the photocatalytic film provided on the inner surface of the transparent window.

According to a ninth aspect of the present invention, in order to achieve the first object, the device provided with the photocatalyst film according to the ninth aspect has a light transmissive photocatalyst film on the surface of the light transmissive sheet. The printed portion is formed on the back surface of the sheet to indicate that a photocatalytic film is provided, and the back surface side of the sheet is joined to the exterior of the device.

According to the configuration of the ninth aspect, when the back side of the sheet is joined to the exterior of the device, a translucent photocatalytic film is provided on the exterior of the device. In this state, the photocatalyst film is formed on the exterior, and when the exterior of the completed device is viewed, the photocatalyst film is provided by a transparent sheet and a printed portion that can be visually recognized through the photocatalyst film. Easy and reliable identification. Also, by looking at the printed portion, a third party can easily know the effect of the photocatalyst, and it is easy to understand that the reason for the high cost of the equipment is due to the formation of the photocatalyst film.

Further, even when processing the equipment, it is possible to easily determine whether or not the photocatalytic film is formed on the member processed into a predetermined shape, and the processability is improved. Also, at the time of the component acceptance inspection, if the term is printed by the printing unit, it can be confirmed that the photocatalytic film is formed on the spot. That is, the identification of the photocatalyst film by the printing unit is facilitated, so that the management at the time of assembling and the management at the time of distribution are facilitated.

Also, by using a transparent sheet,
The terms can be silk-printed on a flat sheet, and the display of the terms by the printing unit becomes extremely easy. In addition, since the printed portion is printed on the back surface of the sheet, the display is not exposed on the exterior surface of the device, the printed portion disappears during use, or the printed portion peels due to expansion and contraction of the exterior during use of the device. The fear can be eliminated.

According to a tenth aspect of the present invention, there is provided a method of manufacturing a device having a photocatalyst film provided on an exterior, in order to achieve the second object, a light-transmitting sheet having a light-transmitting surface. A photocatalytic film is formed, and a protective film having a different surface state from the sheet such as color or unevenness is attached to the surface of the photocatalytic film on the front surface side of the sheet. Print the specified design on the back,
After printing, the sheet is processed into a predetermined shape, and after the shape processing, the back surface of the sheet is joined to the exterior of the device, and after the sheet is processed into a predetermined shape, the protective film is peeled off from the surface of the photocatalytic film. It is characterized by doing.

According to the method of the tenth aspect, after the printing is performed on the back surface of the sheet, the protective film is adhered to the surface of the photocatalytic film without being peeled off until it is processed into a predetermined shape. In addition, since this protective film has a color and unevenness different from the surface of the sheet, it is possible to easily and reliably identify whether or not the photocatalytic film is provided at the time of processing. In addition, when a predetermined design is printed, since a protective film having a surface condition different from that of the sheet is attached to the surface of the photocatalytic film, it is possible to prevent printing on the photocatalytic film side by mistake. In addition, when printing or forming into a predetermined shape, the surface of the photocatalyst film can be prevented from being stained or scratched, and the photocatalyst film can be provided there only by checking the surface condition of the protective film during parts management. It is possible to easily and reliably identify whether or not the information has been set. This facilitates management not only at the time of processing but also at the time of physical distribution, including at the time of component management and component acceptance inspection.

According to the present invention, there is provided a method for inspecting a device provided with a photocatalyst film on an exterior thereof, wherein the photocatalytic film having translucency and hydrophilicity is provided on the exterior of the device in order to achieve the third object. A predetermined dirt is attached to the surface of the photocatalytic film coated on a part of the exterior, and the dirt is soaked or soaked with water for a predetermined time, and then the dirt is removed. Thus, the presence or absence of the photocatalyst film is confirmed.

According to the method of the eleventh aspect, a predetermined dirt is attached to a portion of the exterior of the device which is covered with the photocatalytic film,
It is possible to easily and reliably determine that the photocatalyst film is covered simply by immersing or soaking water in the contaminated portion for a predetermined period of time and then confirming the removability of the contaminant. Can be fully understood and used by third parties. Also, at the time of processing, the photocatalytic surface can be easily and reliably identified, and the processability is improved. Further, even at the time of the acceptance inspection of the component, it can be confirmed that the photocatalytic film is formed on the spot from the dirt removal property.
That is, since the identification of the photocatalyst film is facilitated, the management at the time of assembly processing and the management at the time of distribution are facilitated.

According to a twelfth aspect of the present invention, in addition to the configuration of the eleventh aspect, the photocatalyst film faces the front of the equipment used indoors. It is characterized by being coated on a part of the exterior.

According to the twelfth aspect of the present invention, since the photocatalyst film covers a part of the exterior located in front of the equipment used indoors, the photocatalyst film can obtain weak light as much as possible even indoors. As a result, a difference in the photocatalytic action between a portion irradiated with light and a portion not irradiated with light hardly occurs. Therefore, the photocatalytic action can be effectively utilized without any practical problems even in equipment used indoors. In addition, even when the supply of light in a room is small due to the photocatalytic film having hydrophilicity, the cleaning property of the device can be improved by improving the removal of dirt due to the hydrophilicity, and the room can be used in a room where the ultraviolet light intensity is weak. The practicality of the equipment used can be improved.

Also, since the photocatalyst film is coated on a part of the exterior located at the front of the device, the photocatalyst film can obtain weak light as much as possible. A difference in photocatalytic action is less likely to occur.

According to a thirteenth aspect of the present invention, there is provided a method for inspecting an apparatus provided with a photocatalytic film on an exterior, according to the eleventh or twelfth aspect.
, A part of the exterior is an exterior surface that can be seen from directly above the device.

According to the method of the thirteenth aspect, even if an object is placed on the side surface of the device, the light can reliably hit the photocatalyst film, and even a device used indoors has no practical problem.
The photocatalytic action of the device can be more effectively utilized.

According to a fourteenth aspect of the present invention, there is provided a method for inspecting an apparatus provided with a photocatalytic film on an exterior, wherein the part of the exterior performs display or operation relating to operation of the apparatus. It is an exterior surface.

According to the fourteenth aspect of the present invention, if a part of the exterior covering the photocatalyst film is an exterior surface on which the display and operation related to the operation of the device are performed, the portion which is easily touched by the hand or the portion of the The photocatalytic action of the photocatalytic film is limited to the part where prevention of dirt adhesion is particularly useful in practical use, such as the part facing the front where dirt is annoying in appearance and the part where the inside display is checked. In other words, the difference in photocatalytic action between the light-irradiated part and the light-irradiated part is further reduced. Therefore, even if the device is used indoors, the photocatalysis of the device can be more effectively utilized without any practical problem.

According to a fifteenth aspect of the present invention, there is provided a method for inspecting a device provided with a photocatalyst film on an exterior, wherein the ultraviolet intensity applied to a part of the exterior is 3 mW. / Cm ² or less.

According to the method of claim 15, the exterior is illuminated.
The intensity of the UV light emitted is 3 mW / cm ²Under the following environment
Considering living space from indoor lighting such as fluorescent lights
Can be installed and used in a location
Wear.

[0043]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a device provided with a photocatalyst film according to the present invention will be described with reference to the accompanying drawings. The device shown in the embodiment is a rice cooker. 1 to 11 show a first embodiment of the present invention, and show a cross-sectional view of a sheet member having a photocatalyst film formed on the surface thereof. FIG. 1 shows a resin sheet 1 having a light-transmitting (transmitting) property. The resin sheet 1 is formed of a resin material such as a polycarbonate resin, a vinyl chloride resin, and a polyester. The material of the resin sheet 1 is not particularly limited as long as it has at least a light transmitting property and does not hinder the formation of the titania layer 2 corresponding to a photocatalyst film described later. The resin sheet 1 is made of an elastically deformable member.
It is formed to a thickness of about 125 to 250 μm. In order to prevent the resin sheet 1 from deteriorating due to photocatalysis, a protective layer 3 containing a ceramic inorganic substance such as silica (silicon dioxide) or glass as an organic binder is provided on one side, that is, the surface of the resin sheet 1. A hydrophilic titania powder layer having a contact angle of 20 ° or less, and preferably 10 ° or less, with a water droplet obtained by oxidative decomposition of an organic compound by irradiating ultraviolet rays on the upper surface, that is, the surface of the protective layer 3; Coated, translucent titania layer 2
Is formed. The thickness of the photocatalytic film formed by this coating is about 0.3 to 5.0 μm (thickness of the titania layer 2 + protective layer 3) including the thickness of the protective layer 3. Further, a surface protection film 4 is removably attached to the upper surface, that is, the surface, of the titania layer 2 to prevent damage during processing. The surface protection film 4 has excellent heat resistance,
In addition, a material such as polyester formed to a thickness of about 25 μm which does not hinder the peeling of the surface protection film 4 during use is selected. The material of the surface protection film 4 is
It is preferable that the material of the resin sheet 1 is the same as that of the resin sheet 1 so that the coefficient of thermal expansion during printing and drying during processing is different from that of the resin sheet 1 so as not to peel off from the surface of the titania layer 2 during drying.

The resin sheet 1 opposite to the titania layer 2
A back surface protective film 5 is peelably attached to the back surface of the substrate for the purpose of preventing damage during processing. The back surface protection film 5 has a color tone different from that of the surface protection film 4, and a material different from the surface protection film 4 such as polyethylene is selected. Otherwise, the surface protective film 4 may be colored, or the color tone of the protective films 4 and 5 may be changed on the front and back sides so that the surface of the titania layer 2 can be easily identified. Even if the color tone is not changed, an identification portion such as a predetermined cut or unevenness may be provided on one of the surface protection film 4 and the back surface protection film 5 so that the titania layer 2 surface can be identified.
Furthermore, the surface protection film 4 or the back surface protection film 5
Whether only one of them is provided or both are provided may be selected according to the processing step and management method of the resin sheet 1.

In processing the resin sheet 1, the resin sheet 1 is annealed by heating. This is performed to secure the dimensions of the resin sheet 1 in consideration of the elongation of the resin sheet 1 when the print forming portion is heated for drying after the predetermined silk printing is performed on the back surface of the resin sheet 1. Things. The temperature and time for performing the heat annealing are, for example, 80
The temperature may be set to a time of about 120 ° C. for 15 minutes, and may be appropriately set in consideration of the drying property of the ink, the prevention of cracking of the ink, and the prevention of peeling of the titania layer 2 which is heated at the same time.

After performing the above-mentioned annealing heating, the backside protective film 5 is peeled off, and an arbitrary design such as characters, numerals, patterns, or a solid design is printed on the backside of the resin sheet 1 in a predetermined color. ,dry. This allows
As shown in FIG. 2, a character printing portion 11 directly indicating the formation of a photocatalyst film such as “photocatalyst coat” and a character “hydrophilic processing” or “antifouling processing” indicating the formation of the photocatalytic film indirectly. The printing units 12 and 13 are formed by printing on the back surface of the resin sheet 1 that becomes the operation panel 14 of the rice cooker after completion so that the printing unit 12 can be visually recognized from the front side. It should be noted that the character printing units 11, 12, and 13 as printing units shown in FIG. 2 are merely examples, and the printing position and size of the term may be determined in consideration of design and the like.
In addition, terms and symbols other than the examples, or marks, etc.
What is necessary is just to indicate directly or indirectly that the photocatalyst film is provided. However, the printing color on the back surface of the resin sheet 1 is
Avoid white. If you must use white colors,
It is desirable to avoid using pure white colors such as ivory white or light gray that slightly mixes yellow or gray. Further, when a transparent window (not shown) is formed on the resin sheet 1 so as to be located on the upper surface of a display unit such as an LCD so that the internal display can be seen, the character printing unit 11 and
What is necessary is just to make it transparent, without forming 12 and 13.

The back surface protective film 5 is peeled off from the back surface of the resin sheet 1 during printing. Therefore, the back surface protection film 5 only needs to have sufficient strength to prevent the resin sheet 1 from being damaged until printing is performed on the back surface of the resin sheet 1, and heat resistance is not so required. The surface protective film 4 is still attached to the surface of the titania layer 2 during drying after printing, and is required to withstand the drying temperature in order to prevent the surface from being damaged. In addition, since the expansion and shrinkage of the surface protection film 4 due to drying is preferably the same as that of the resin sheet 1, it is preferable to select the same material for the resin sheet 1 and the surface protection film 4.

Thereafter, the resin sheet 1 is trimmed (cut out) into a predetermined shape, and a double-sided adhesive is stuck on the back surface.
As shown in FIG. 3, an adhesive panel 15 is formed, and an operation panel 14 as a sticking sheet member on which a photocatalytic film is formed is completed. The double-sided adhesive has thermosetting properties, and the adhesive strength does not decrease due to the heat effect during processing or when using equipment.
A material with a thin thickness of about 700 μm and a material with relatively good elongation at the time of local curved surface processing are selected. Further, as shown in FIG. 4, before the trimming is performed, the adhesive layer 15 is formed on the back surface, and the resin sheet 1 is pressed into a mold to form a three-dimensional shape in which the convex portion 16 is formed. In some cases, the operation panel 14, which is a pasting sheet member, is completed. If the deformation rate of the resin sheet 1 when forming it into a three-dimensional shape is large, the resin sheet 1 may be heated by a heat press (a heated mold or by heating the resin sheet 1 after embossing).
Is applied) to process the resin sheet 1 into a predetermined shape. During processing such as annealing, printing, embossing, and heat pressing, the resin sheet 1 expands (expands) in each step. The processing is performed with the expansion rate suppressed to 5%, preferably 3% or less. . In particular, when processing a three-dimensional shape in which the elongation rate of the resin sheet 1 becomes large, the elongation rate after processing is suppressed to within 5% of the initial surface dimension of the resin sheet 1 after the formation of the titania layer 2. Limit to shape.

After molding the resin sheet 1 into a predetermined shape,
Alternatively, such as after attaching the molded resin sheet 1 to an outer shell 21 which is an exterior of equipment described later, any time after the end of the process for preventing scratches after printing may be performed,
The surface protection film 4 attached to the front surface side of the resin sheet 1 is peeled off, and the operation panel 14 is used. As shown in FIGS. 2 and 5, by joining the operation panel 14 to a predetermined position of the outer casing 21 by the adhesive layer 15, the outer casing 21 provided with the resin sheet 1 with the photocatalytic film can be finally obtained. At this time, the titania layer 2 covers a part of the outer shell 21 located in front of a device (rice cooker) used indoors. The reason that the front surface of the device is covered with the titania layer 2 is that, when the device is used indoors, a portion where the light of the fluorescent lamp is likely to hit is the front surface of the device. Therefore, the bottom surface of the device to which the light of the fluorescent lamp hardly hits, or the back surface of the device to which the light of the fluorescent lamp hardly hits,
Need not be coated.

When the titania layer 2 is viewed from directly above the device,
It is desirable to cover the exterior surface which looks flat. Ma
For example, in the case of a rice cooker, a switch to start cooking and keeping warm
Or off switch, or clock and rice cooking process or warming process
Display related to device operation, such as a transparent window that displays
And covering the exterior surface with the titania layer 2
Practically desirable. It should be noted that ultraviolet rays irradiated to
Line intensity is 3mW / cm ²Under the following environment, indoor fluorescent lamps
A place that is moderately separated from lighting such as living space
The titania layer 2 is coated on the outer shell 21
Overturned.

The material of the outer shell 21 is not particularly limited, such as metal, plastic, and ceramics, but a material that can maintain the adhesive force of the adhesive layer 15 is selected. When plastic is used for the outer shell 21, in many cases, polypropylene that is inexpensive, has excellent heat resistance, is lightweight and has excellent stress crack resistance and chemical resistance is often selected, but polypropylene has poor adhesion of the paint during painting, It is difficult to directly coat the outer surface of the titania layer 2. However, if a double-sided adhesive is used, the titania layer 2 can also be formed.

In addition to the method of attaching the resin sheet 1 to the outer shell 21 using the adhesive layer 15 as shown in FIG. 5, the resin sheet 1 is outsert molded when the outer shell 21 is formed. You may make it attach integrally. In this method, a predetermined adhesive is applied to the back surface of the resin sheet 1, the resin sheet 1 is pre-processed into a predetermined shape, and then the resin sheet 1 is injection-molded in a state where the resin sheet 1 is installed inside a mold for forming the outer shell 21. , The outer shell 21 is formed, and at the same time, the resin sheet 1 is
Join to 21. In the case of this outsert molding,
The elongation rate of the resin sheet 1 after molding is suppressed to 5%, preferably 3% or less.

The advantage of the outsert molding is that, as shown in FIG. 6, even when the end portion 31 of the resin sheet 1 is bent almost vertically, it can be joined to the outer shell 21. However, in the vertical surface portion 32 of the resin sheet 1, the elongation at the time of processing the resin sheet 1 becomes large, and it becomes difficult to suppress the elongation rate to within 5%. However, the vertical surface portion 32 is substantially perpendicular to the outer surface of the resin sheet 1 and is hardly visible to a user. Therefore, even if the vertical surface portion 32 is slightly clouded due to the extension of the resin sheet 1, the appearance is not hindered, and the adhesion of dirt is smaller than the surface side of the resin sheet 1. Peeling occurs,
Even if a sufficient photocatalytic action cannot be obtained, there is little practical problem. Therefore, the elongation rate of the vertical surface (vertical surface portion 32) of the resin sheet 1 changed in a direction substantially perpendicular to the surface of the device outer casing 21 does not need to be limited to the predetermined value of 5% or less. Further, not only in the case of outsert molding, but also in the case where the resin sheet 1 is embossed at the hole 33 of the outer casing 21 as shown in FIG. For the side portion 35, the limitation of the elongation rate of the resin sheet 1 is not applied for the same reason.

As shown in FIG. 8, when the resin sheet 1 with the titania layer 2 is joined to the outer casing 21 of the plastic device, the end portion 41 of the titania layer 2 formed on the resin sheet 1 is connected to the device. A gap 43 is formed between the sheet mounting portion 22 and the end portion 42 of the concave shape formed on the outer shell 21 so as not to contact with each other. As shown in FIG. 9, when an outer shell 21 of a plastic-based device is provided around the resin sheet 1 having the titania layer 2 formed on the surface, the outer surface 21 of the titania layer 2 is Form a similar gap 44 between,
Configure so as not to touch. In particular, where light is likely to hit the contact area between the photocatalyst surface and the plastic, this gap
Make sure that 43 and 44 are not in contact. Gap
The size of 43 and 44 is not particularly limited, but the photocatalysis occurs on the surface of the titania layer 2, so that it is not necessary to make contact with the surface. This makes it possible to easily form the outer casing 21 of the device, which is a plastic member, without forming a protective layer as in the related art.
Degradation can be prevented.

Although the above description has been made on the case where the titania layer 2 is formed on the surface of the transparent resin sheet 1 in both cases, as shown in FIG. 10 and FIG. The outer shell 21 may be directly coated with a titania layer 2 (photocatalytic film) having translucency. However, in the case of coating with an organic compound, a predetermined display unit (for example, as shown in FIG. 10 shown in FIG. 10) that indicates, by a direct or indirect term, that a photocatalytic film is provided on the outer shell 21 on which the titania layer 2 is coated. A character printing portion 51) in the form of a “photocatalyst coat” is provided by imprinting, and the outer layer 21 is coated with a protective layer 52 so as not to be oxidized and decomposed, and the titania layer 2 is coated on the upper surface of the protective layer 52. Do. As a result, the character printing portion 51 is printed on the back side of the titania layer 2.

Another inspection method for confirming the presence of the titania layer 2 is performed according to the following procedure. Attach dirt such as magic ink to the surface of the outer shell 21 which seems to have covered the titania layer 2 and soak the dirt or the entire dirt in water for about 30 seconds to 10 minutes, or Then, soak a sufficient amount of water in a towel or tissue paper, cover it over the soiled area, and wet it. Thereafter, if the dirt can be easily removed by wiping, it can be confirmed that the photocatalytic film, that is, the titania layer 2 exists there. Conversely, if the stain cannot be easily removed and some traces remain, it can be determined that the photocatalytic film does not exist there or the photocatalytic activity is low. This method can be used not only in the inspection process at the time of processing, but also as a function to advertise the functions of the exhibits and identify them, and as a method of removing dirt if the equipment outer casing 21 gets dirty when the equipment is used at home. It can be described in the instruction manual.

In the inspection process at the time of processing, the same type of dirt is applied to the same material on which the titania layer 2 is not formed, and the same type of material is immersed in water. Becomes possible. Further, the adhesion of the stain is not limited to the magic ink, and the time of immersion in water may be, for example, one hour or overnight, and may be arbitrarily set based on the experimental results. The magic ink is preferably oil-based, but depending on the type, the stain removal property may be poor. With these inks, if the time of immersion in water is long, the stains can be removed, but a type of magic ink that can be inspected in a short time may be selected in advance. Further, according to the present inspection method, if the magic ink is wiped off, the apparatus can be reused without a defect in appearance, and thus can be used as a nondestructive inspection method.

As described above, in this embodiment, in the device in which the translucent titania layer 2 is provided on the outer shell 21, the fact that the photocatalytic film is provided at the position corresponding to the back side surface of the titania layer 2 is directly described. Character printing units 11, 12, 13, and 51 are provided as display units expressed in terms of indirect or indirect terms. Thus, the translucent titania layer 2 is placed on the outer casing 21 of the device.
In this state, the titania layer 2 is formed on the outer shell 21 while taking advantage of the characteristics unique to the model of the device, and when the outer shell 21 of the completed device is viewed, the titania layer 2 is visually recognized through the transparent titania layer 2. Character printing units 11, 12, 13, 51 that can be used
Accordingly, it can be easily and reliably identified that the titania layer 2 is provided thereon. In addition, this character printing unit 11,
By looking at 12, 13, and 51, a third party can easily know the effect of the photocatalyst, and it is easy to understand that the reason for the high cost of the equipment is due to the formation of the titania layer 2. Further, even when processing the device, it is possible to easily determine whether or not the titania layer 2 is formed on the member processed into a predetermined shape, and the processability is improved.

In this case, with the resin sheet 1 and the protective layer 52 interposed on the back side surface of the titania layer 2, the character printing sections 11 and
With the configuration in which 12, 13, and 51 are provided, the resin sheet 1 and the protective layer 52 become barriers even when an organic coating material is used for printing, and the character printing sections 11, 12, and
There is no danger that 13, 51 will disappear due to photocatalysis.

If the processing of the parts of the equipment is performed at a factory other than the company's own factory, the character printing units 11, 12, 1
With the printing of the terms according to 3, 51, it can be confirmed that the titania layer 2 is formed on the spot. Alternatively, if the component is delivered with the surface protection sheet 4 attached thereto, it can be easily determined whether or not the titania layer 2 is formed on the component by checking the color and unevenness of the surface protection sheet 4. There are advantages too. In other words, the identification of the titania layer 2 is facilitated by the character printing units 11, 12, 13, and 51, so that management during assembly processing and management during distribution are facilitated.

In this embodiment, a translucent titania layer 2 is formed on the surface of a resin sheet 1 which is a translucent sheet, and the titania layer 2 is provided on the back surface of the resin sheet 1. Are provided as character display units 11, 12, 13, and 51 as display units that represent the direct and indirect terms, and the back side of the resin sheet 1 is joined to the outer casing 21 of the device. Also in this case, when the back surface side of the resin sheet 1 is joined to the outer shell 21 of the device, the translucent titania layer 2 is provided on the outer shell 21 of the device. The titania layer 2 is formed on the outer shell 21, and when the outer shell 21 of the completed device is viewed, the character printing unit 1 visible through the transparent titania layer 2 and the resin sheet 1 is visible.
1, 12, 13, and 51 make it possible to easily and reliably identify that the titania layer 2 is provided thereon. Also, by looking at the character printing sections 11, 12, 13, and 51, a third party can easily know the effectiveness of the photocatalyst, and the reason for the high cost of the equipment is that the titania layer 2 is formed. Is easier to understand. Further, when processing the device, the titania layer 2 is applied to the member processed into a predetermined shape.
Whether or not is formed can be easily determined, and workability is improved.

Further, even when processing the equipment, it is possible to easily determine whether or not the titania layer 2 is formed on the member processed into a predetermined shape, and the processability is improved. Also, at the time of parts acceptance inspection, the character printing unit 1
By printing the terms 1, 12, 13, and 51, it can be confirmed that the titania layer 2 is formed on the spot. In other words, the identification of the titania layer 2 is facilitated by the character printing units 11, 12, 13, and 51, so that management during assembly processing and management during distribution are facilitated.

In addition, by using the transparent resin sheet 1, terms can be silk-printed on the flat resin sheet 1,
The display of terms by the character printing units 11, 12, 13, 51 becomes extremely easy. Furthermore, since the character printing units 11, 12, 13, and 51 are printed on the back surface of the resin sheet 1, the display is not exposed on the surface of the outer casing 21 of the device, and the character printing units 11, 12, 13, 51 are used during use. It is possible to eliminate the possibility that the character printing portions 11, 12, 13, and 51 will be peeled off due to disappearance or expansion and contraction of the outer shell 21 during use of the device.

Further, since the resin sheet 1 processed into a predetermined shape is joined to the outer casing 21 of the device, the character printing units 11, 12, 13, and
After printing 51, if the resin sheet 1 is formed into a three-dimensional shape surface in accordance with the joint portion of the outer shell 21, the outer shape of the three-dimensional curved surface can be obtained.
The term 21 can be easily displayed on the character printing units 11, 12, 13, and 51.

In this embodiment, when manufacturing a device in which the titania layer 2 is provided on the outer shell 21, the translucent titania layer 2 is formed on the surface of the translucent resin sheet 1. On the surface of the titania layer 2 on the surface side of the above, a surface protective film 4 which is a protective film having a different surface condition from the resin sheet 1 such as color and unevenness is adhered, and in a state where the surface protective film 4 is adhered, the resin sheet 1 is adhered. A predetermined design is printed on the back surface of the resin sheet, and after printing, the resin sheet 1 is processed into a predetermined shape. After the shape processing, the back surface of the resin sheet 1 is joined to the outer casing 21 of the device, and the resin sheet 1 is processed into the predetermined shape. After that, a method of peeling the surface protective film 4 from the surface of the titania layer 2 is performed. Here, the predetermined design does not directly or indirectly represent the photocatalyst film as in the character printing units 11, 12, and 13. For example, in the case of a rice cooker, "rice cooking" or "heat insulation" is used. ”And other general designs.

In such a manufacturing method, after the surface protection film 4 is printed on the back surface of the resin sheet 1, the surface protection film 4 is adhered to the surface of the titania layer 2 without being peeled off until processed into a predetermined shape. I have. Moreover, since the surface protective film 4 has a different color and unevenness from the surface of the resin sheet 1, it is possible to easily and reliably identify whether or not the titania layer 2 is provided at the time of processing. In addition, when a predetermined design is printed, the surface protection film 4 having a different surface state from the resin sheet 1 is stuck on the surface of the titania layer 2 so that the resin sheet 1 is erroneously printed on the titania layer 2 side. Can be prevented. In addition, when printing, cutting or squeezing into a predetermined shape, the surface of the titania layer 2 can be prevented from being stained or scratched, and only the surface condition of the surface protection film 4 is checked during parts management. Thus, whether or not the titania layer 2 is provided thereon can be easily and reliably identified. This facilitates management not only at the time of processing but also at the time of physical distribution, including at the time of component management and component acceptance inspection.

When the light source is mainly illumination such as a fluorescent lamp in a room, the intensity of the ultraviolet light applied to the equipment is 0.01 to 0.01.
In ~1.0 mW / cm ² or so, even if you install the equipment on a sunny day near a window, it is 3mW / cm ² or less. this is,
Compared to 3~8mW / cm ² is UV intensity of outdoor,
Very weak UV intensity. Accordingly, in order to utilize the photocatalytic action on the indoor equipment, the titania layer 2 is coated on the exterior facing the front of the equipment, that is, a part of the outer shell 21, in order to obtain this limited weak light as much as possible. This way,
The titania layer 2 can obtain weak light as much as possible even in a room, so that a difference in photocatalytic action between a portion irradiated with light and a portion not irradiated with light is less likely to occur. In this case, if a part of the outer shell 21 covering the titania layer 2 is an exterior surface that looks planar when the device is viewed from directly above, even if an object is placed on the side of the device, the titania layer 2 The light comes on. Also,
If a part of the outer cover 21 that covers the titania layer 2 is an exterior surface on which display and operation related to the operation of the device are performed, a portion that is easily touched by a hand or a surface facing the front of the device and the dirt is fine. And the part where prevention of dirt adhesion is particularly useful in practice, such as the part where
The photocatalysis by the titania layer 2 is applied in a limited manner, and the difference in the photocatalysis between the light-irradiated part and the light-irradiated part is further reduced. In addition, if the titania layer 2 is coated on a part of the exterior located in front of the device, not limited to the device used indoors in particular, the titania layer 2 can obtain weak light as much as possible. A difference in photocatalytic action in a portion not exposed to light is less likely to occur.

It is known that the titania layer 2 as a photocatalytic film absorbs light and becomes more hydrophilic. In other words, since the hydrophilicity is high, water is more easily applied to the surface of the titania layer 2 than oil stains. For example, even when oil droplets are attached, the oil naturally flows from the surface of the titania layer 2 when immersed in water. break away. This self-cleaning property improves the cleanability of equipment used indoors in that it is easy to remove oil stains attached to equipment that is difficult to remove. The hydrophilicity of the titania layer 2 can also be made super-hydrophilic with a contact angle with water of 10 ° or less by applying strong ultraviolet rays. However, the titania layer 2 which is a photocatalytic film has numerous infinitesimal cracks, and has a higher hydrophilicity than a normal plastic material such as a PET sheet or PP even when light is not supplied. The contact angle is less than 20 °.
Therefore, the action relating to hydrophilicity can be utilized even in indoor equipment with a small amount of ultraviolet rays.

As a result of the experiment, the ultraviolet intensity was 0.01 mW / cm.
The surface of the titania layer 2 left for half a day in about ² rooms is stained with oily magic ink and then immersed in water for 1 minute.
When the stain was wiped off, most of the magic ink was transferred to the wiped cloth, and the stain on the surface of the titania layer 2 was removed.
On the other hand, similarly stained PET sheets could not completely remove the stains, leaving traces. The same result was obtained after immersion in water for about one hour. From these facts, it was found that even when the ultraviolet intensity for the titania layer 2 was low, the effect due to the hydrophilicity was sufficiently obtained. As described above, even if the surface of the titania layer 2 is stained with oil during use of the device, the effect of easily removing the stain can be obtained by wiping with water.

A one-month practical test was performed.
Six out of ten people had little oil adhesion and had an antifouling effect.
It was found that the dirt in use by nine of them can be easily removed with a single water wipe, and if a certain amount of light can be supplied indoors, the effect of decomposing the dirt can be reliably obtained. However, the effect of improving the removability of dirt due to hydrophilicity was obtained even without the presence of the polymer. Furthermore, even if coffee soaked stains occurred on the surface of the titania layer 2, the stains could be easily lifted out and removed by placing a wet towel on the soiled portion for a while.

The action resulting from the hydrophilicity can be used for a method for confirming the presence of a photocatalytic film. That is, a predetermined dirt is attached to the surface of the titania layer 2 covering the outer shell 21, and water is immersed in the dirt portion for a predetermined time or wet with water, and then the presence or absence of the titania layer 2 is checked by the dirt removal property. It becomes possible to do. At this time, if the titania layer 2 is covered, the dirt can be easily removed as compared with the case where the titania layer 2 is not covered. This can be used not only during various types of processing and inspections, but also to advertise the intentional attachment of dirt to the equipment at the store and its easy removal, and exhibits using photocatalysts (equipment)
Identification and the ability of third-party customers to fully understand the effectiveness of photocatalysts.

That is, in a device to be used indoors, the titania layer 2 as a photocatalytic film is coated on a part of the outer shell 21 which is practically useful so as not to obstruct the appearance as much as possible and is used indoors. The photocatalysis can be more effectively utilized without any practical problems in equipment. In addition, if the titania layer 2 has hydrophilicity, even when the supply of light indoors is small, the cleaning property of the device can be improved by improving the removal of dirt caused by the hydrophilicity, and the ultraviolet intensity can be improved. It becomes possible to improve the practicality of equipment used in a weak room.

Further, according to the above-described inspection method, a predetermined dirt is attached to a portion of the outer shell 21 of the device which is covered with the titania layer 2, and the dirt is soaked with water for a predetermined time or wet with water. It is possible to easily and surely determine that the titania layer 2 is covered only by checking the dirt removal property, and a third party can fully understand and use the effect of the photocatalyst. Also, at the time of processing, the photocatalytic surface can be easily and reliably identified, and the processability is improved. Further, even at the time of the acceptance inspection of the component, it can be confirmed that the photocatalytic film is formed on the spot from the dirt removal property. In other words, it is easy to identify the photocatalyst film,
Management during assembly processing and management during physical distribution are facilitated.

Next, a second embodiment of the present invention applied to a rice cooker will be described with reference to FIGS. In addition,
The titania layer 2 as a photocatalyst film used here is the first layer.
It has translucency and hydrophilicity as in the examples. The same parts as those in the first embodiment are denoted by the same reference numerals, and the description of the common parts will be omitted because they are duplicated.

On the front of the main body 60 constituting the outer shell 21 of the rice cooker, an operation section 61 composed of a plurality of switches for instructing each operation such as rice cooking and heat keeping, and various displays related to the rice cooker are provided. An operation panel 63 including a display unit 62 is provided. The base material 64 of the display unit 62 attached to the outer shell 21 is AS,
It is made of a translucent material such as ABS, acrylic, or PET resin. An anatase-type titania layer 2 is formed on a surface of the base material 64 on the inside of the device so as to have a light transmitting property. The photocatalytic film is not limited to the titania layer 2 but may be any photocatalytic film that has hydrophilicity and improves hydrophilicity by light irradiation.
As shown in FIG. 12, the titania layer 2 can be directly coated on the inner surface of the base material 64 as shown in FIG. 12, or as shown in FIG. The film 65 may be attached to the surface of the base material 64 on the inside of the device. At the position where the base material 64 of the operation panel 63 is attached, a transparent portion 66 is defined and formed. The transparent portion 66 and the base material 64 (FIG. 12) or the transparent portion 66,
The base material 64 and the PET film 65 (FIG. 14) form a transparent window 67 at a predetermined position on the outer shell 21 of the device. The inner surface of the transparent member 67 faces a closed space formed inside the device.

Inside the main body 60, a pot 71 for accommodating rice, which is the rice to be cooked A, and water is detachably provided on the inner frame 72. Also, facing the bottom and lower side of the pot 71, the inner frame
A heating means 73 such as an induction coil for electromagnetically heating the pan 71 is provided on the outer surface of the 72. On the outer surface of the pan 71,
A heating layer (not shown) made of a magnetic metal material is joined, and when a high-frequency current is supplied to the heating means 73 during rice cooking or warming, the heating layer of the pot 71 generates heat by a magnetic field generated from the heating means 73, The cooked food A in the pot 71 is heated. At this time, steam is generated from the cooked food A in the pot 71, and this steam passes through a steam port (not shown) provided in the lid 75 covering the upper opening of the main body 60, and To be released. That is, inside the main body 60, the heating means 73 is provided, and the cooked food A as the steam generation source heated by the heating means 73 is present.

A liquid crystal display 76 for displaying a clock, a rice cooking menu, and the like is mounted on the component mounting surface of the board 77 inside the main body 60 so as to face the transparent window 67 of the display section 62. Therefore, from the front of the main body 60, the display form of the liquid crystal display 76 can be visually recognized through the transparent window 67 and the titania layer 2.

The operation panel 63 may be provided not from the front of the main body 60 but from the front to the top of the lid 75. The modified example is shown in FIG. 15 and FIG. In this modification, the liquid crystal display 76 is provided inside the lid 75, but in the point that the liquid crystal display 76 is provided inside the rice cooker, there is a difference from the configuration shown in FIGS. Absent. In any of the above-described configurations, a printing unit is provided at a position where the titania layer 2 is formed, which indicates that a photocatalytic film is provided in a direct or indirect term. The printing unit in this case is, for example, the character printing units 11, 12, 13, 51 shown in the first embodiment.
And so on.

In each of the above structures, in a device in which the translucent titania layer 2 is provided on the outer shell 21, it is a direct or indirect term that a photocatalytic film is provided at a position corresponding to the titania layer 2. Character printing section as display section represented by
11, 12, 13, and 51 are provided. Thus, by providing the translucent titania layer 2 on the outer shell 21 of the device,
With the unique characteristics of the model of the device,
The titania layer 2 is formed on the outer side 21 of the completed device, and the titania layer 2 is provided there by the character printing portions 11, 12, 13, and 51 which can be visually recognized through the transparent titania layer 2. Can be easily and reliably identified. Also, by looking at the character printing sections 11, 12, 13, and 51, a third party can easily know the effectiveness of the photocatalyst, and the reason for the high cost of the equipment is that the titania layer 2 is formed. Is easier to understand. Further, even when processing the device, it is possible to easily determine whether or not the titania layer 2 is formed on the member processed into a predetermined shape, and the processability is improved.

When the processing of the parts of the equipment is performed at a place other than the company's own factory, the character printing units 11, 12, 1
With the printing of the terms according to 3, 51, it can be confirmed that the titania layer 2 is formed on the spot. In other words, the identification of the titania layer 2 is facilitated by the character printing units 11, 12, 13, and 51, so that management during assembly processing and management during distribution are facilitated.

By the way, in the conventional transparent window portion of the device of this type, translucency is important for confirming the display on the display device. However, in a situation where the room temperature is low such as in winter, the moisture inside the device is transparent. Water condensation forms on the inner surface side of the window in the device, and the visibility through the transparent window may deteriorate due to clouding. In particular, if a heating means or a steam generation source is provided inside the equipment, the temperature difference between the internal atmosphere of the equipment and the transparent window will increase,
This phenomenon becomes remarkable. In addition, when a liquid crystal display (LCD) is used as a display, the LCD reflects light from a transparent window to perform display, which causes a reduction in visibility.

Therefore, the purpose of the present embodiment is to provide a device with good visibility by preventing the fogging phenomenon on the inner surface of the transparent window.

In general, the contact angle between the resin and water is 60 to 100
At about °, if moisture adheres, it adheres in the form of water droplets, making it look like a cloudy glass and its light transmittance deteriorates. However, in this embodiment, a transparent window 67 having a light-transmitting property is provided at a predetermined position of the outer shell 21 serving as an exterior, and the titania layer 2 serving as a photocatalytic film having a hydrophilic property is provided on a surface of the transparent window 67 on the device inner side. Is formed. Since the contact angle of the titania layer 2 with water is about 30 °, which is high in hydrophilicity, the moisture adhering to the titania layer 2 does not form water droplets, but becomes wet, and has a light transmitting property through the transparent window 67. Hardly gets worse. Further, when the titania layer 2 is irradiated with ultraviolet rays through the transparent window 67, the contact angle becomes about 10 °, the hydrophilicity is further improved, the wettability is further increased, and good anti-fog properties are obtained. . Therefore, even if the moisture (moisture) sealed inside the device adheres to the inner surface of the transparent window 67, the anti-fog property of the titania layer 2 causes the transparent window
The internal display can be checked well through 67,
The fogging phenomenon on the inner surface of the transparent window 67 can be prevented, and a device with good visibility can be provided.

In the case where the heating means 73 is provided inside the device, the temperature difference between the internal atmosphere of the device and the transparent window portion 67 is particularly increased, so that moisture easily adheres to the inside of the transparent window portion 67. However, due to the hydrophilicity of the titania layer 2, the attached moisture does not become water droplets, and the effect of anti-fogging property can be more effectively utilized. Further, in the apparatus having the cooked food A which is a steam generation source inside the apparatus, the possibility that moisture adheres to the inner surface of the transparent window 67 becomes high. The fogging phenomenon on the inner surface can be prevented, and the effect of the antifogging property can be more effectively used, and practicality can be ensured. When a display (liquid crystal display 76) for displaying the operation state of the device is provided inside the device facing the transparent window 67, the transparent window 67 may be slightly used for daily use.
Even when moisture adheres to the inner surface of the
Good visibility can be ensured by the hydrophilic property of. Furthermore, when the display is a liquid crystal display 76 in particular, even in a situation where moisture adheres slightly to the inner surface of the transparent window portion 67 in daily use, a good view is secured by the hydrophilicity of the titania layer 2, Since the display can be performed by reflecting the light from the transparent window 67, it is possible to eliminate the cause of the decrease in the visibility of the liquid crystal display 76.

In this embodiment, the inner surface of the transparent window 67 is opposed to the closed space formed inside the device. In this case, however, the inside of the device is warm in the environment in which the device is used, and Even in a situation where the temperature is low, it is possible to prevent moisture contained in the air in the closed space from adhering to the inner surface of the transparent window portion 67 and dew condensation. In particular, in the case where the heating means 73 is provided inside the apparatus or the cooked food A which is a steam generation source, the temperature inside the main body 60 increases, so that dew condensation easily occurs on the inner surface of the transparent window 67. . Further, when the transparent window portion 67 is condensed and fogged, the display becomes harder to see from the outside, and in the liquid crystal display 76, which displays the display by reflecting light from outside light, the visibility is significantly reduced. However, the titania layer 2 provided on the inner surface of the transparent window 67 can eliminate such a problem even if the transparent window 67 faces the closed space.

Further, in the configuration of FIG. 15 and FIG.
A liquid crystal display 76 as a display is provided in a closed space provided in the lid 75 of the device. In this case, since the transparent window 67 is on the upper surface side, moisture in the closed space is removed by the transparent window. Condensation easily forms on the inner surface of 67. However, the titania layer 2 provided on the inner surface of the transparent window 67 can prevent dew condensation even if the liquid crystal display 76 is in the closed space.

Note that the closed space referred to here is a space that is almost completely closed even if it is not completely sealed.
Each of the above effects can be exhibited.

The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the present invention.

[0089]

According to a first aspect of the present invention, there is provided an apparatus provided with a photocatalyst film on an outer package, wherein the photocatalyst film is provided at a position corresponding to the photocatalyst film. This is provided with a printing section indicating that the photocatalyst film is provided, and it is possible to easily and surely identify whether or not the photocatalyst film is provided at the time of processing, distribution, and completion of the device. In addition, a third party can fully understand the effects of the photocatalyst and use it,
In addition, the photocatalytic film can be easily and reliably identified even during processing or distribution.

In the apparatus provided with the photocatalyst film according to the second aspect of the present invention on the exterior, in addition to the constitution of the first aspect, a transparent window portion having a light transmitting property is provided at a predetermined position of the exterior, and the transparent window is provided. In this case, the photocatalyst film having hydrophilicity is formed on the surface of the inside of the device, and in this case, it is possible to prevent the fogging phenomenon on the inner surface of the transparent window and provide a device with good visibility.

An apparatus provided with a photocatalyst film according to the third aspect of the present invention on the exterior thereof has a heating means provided inside the apparatus in addition to the configuration of the second aspect. Sexual effects can be used more effectively.

An apparatus provided with the photocatalyst film according to claim 4 of the present invention on the exterior thereof has a steam generation source inside the apparatus in addition to the structure of claim 2, and in this case, further comprises:
The anti-fogging effect can be more effectively utilized, and practicality can be ensured.

An apparatus provided with the photocatalyst film according to the fifth aspect of the present invention on the exterior thereof may further include, in addition to the configuration according to any one of the second to fourth aspects, a device inside the apparatus facing the transparent window. In this case, a good visibility can be ensured by the hydrophilicity of the photocatalyst film.

An apparatus provided with a photocatalyst film according to claim 6 of the present invention on the exterior thereof is characterized in that, in addition to the constitution of claim 5, the display is a liquid crystal display.
This can eliminate the cause of the decrease in the visibility of the liquid crystal display.

According to a seventh aspect of the present invention, there is provided an apparatus provided with a photocatalyst film on an exterior thereof, wherein the transparent window portion is formed in the interior of the apparatus in addition to the configuration of any one of the second to sixth aspects. It is characterized by facing the space, and in this case,
Dew condensation on the inner surface of the transparent window can be prevented. In addition, even if a heating means is provided inside the apparatus or a steam generation source is provided, it is possible to prevent dew condensation occurring on the inner surface of the transparent window. Furthermore, even if the display is a liquid crystal display, the visibility can be prevented from lowering.

An apparatus provided with a photocatalyst film according to claim 8 of the present invention on an exterior thereof is provided with the closed space in a lid of the apparatus, and the indicator is provided in the closed space. In this case, the moisture in the enclosed space is more likely to condense on the inner surface of the transparent window, but the dew condensation can be prevented by the photocatalytic film provided on the inner surface of the transparent window. .

An apparatus provided with a photocatalyst film according to the ninth aspect of the present invention on an exterior has a photocatalytic film having a light-transmitting property formed on a surface of a sheet having a light-transmitting property, and a photocatalytic film formed on a back surface of the sheet. A printing unit is provided to indicate that a photocatalyst film is provided, and the back side of the sheet is joined to the exterior of the device, and it is easy to determine whether or not a photocatalytic film is provided during processing, distribution and completion of the device. And can be reliably identified. In addition, the effect of the photocatalyst can be used by a third party with sufficient understanding, and the photocatalyst film can be easily and reliably identified even during processing or distribution. In addition, terms can be silk-printed on a flat sheet, which makes it very easy to display terms on the printed part, and the printed part disappears during use, or the printed part peels off due to expansion and contraction of the exterior when using the equipment Can be eliminated.

According to a tenth aspect of the present invention, there is provided a method of manufacturing a device having a photocatalyst film provided on an exterior thereof, wherein a light-transmitting photocatalyst film is formed on a surface of a light-transmitting sheet, On the surface of the photocatalyst film, a protective film having a different surface state from the sheet such as color and unevenness is attached, and in a state where the protective film is attached, a predetermined design is printed on the back surface of the sheet, and after printing. The sheet is processed into a predetermined shape, and after this shape processing, the back surface of the sheet is joined to the exterior of the device, and after the sheet is processed into a predetermined shape, the protective film is peeled off from the surface of the photocatalytic film. It is possible to easily and reliably identify whether or not a photocatalytic film is provided at the time of processing and distribution of equipment. In addition, management during processing and distribution is facilitated.

According to a method for inspecting a device provided with a photocatalyst film on an exterior according to claim 11 of the present invention, a photocatalyst film having a light transmitting property and a hydrophilic property is coated on a part of the exterior of the device and the exterior of the exterior is covered. Predetermined dirt is attached to the surface of the photocatalyst film partially coated, and the dirt is soaked in water for a predetermined time or wetted with water, and then the presence or absence of the photocatalyst film is confirmed by the removability of dirt. It is possible to easily and reliably identify whether or not a photocatalyst film is provided at the time of processing, distribution, and completion of equipment. In addition, the photocatalytic action of equipment used indoors can be effectively used, and the effects of the photocatalyst can be sufficiently understood and used by a third party, and management during processing and distribution is facilitated.

According to a twelfth aspect of the present invention, in addition to the configuration of the eleventh aspect, the photocatalyst film faces the front of the equipment used indoors. It is characterized in that it is coated on a part of the exterior. In this case, the photocatalytic action can be effectively utilized even with equipment used indoors without any practical problems. Also,
It becomes possible to improve the practicality of the equipment used in a room where the cleaning property of the equipment and the intensity of ultraviolet light are weak. In addition, a difference in photocatalytic action between a light-irradiated portion and a light-irradiated portion can be suppressed.

According to a thirteenth aspect of the present invention, there is provided a method for inspecting a device provided with a photocatalyst film on an exterior, according to the eleventh or twelfth aspect.
In addition to the configuration, a part of the exterior is characterized by an exterior surface seen from directly above the device, in this case, further,
Even if the device is used indoors, the photocatalytic action of the device can be more effectively utilized without any practical problem.

According to a fourteenth aspect of the present invention, there is provided a method for inspecting an apparatus provided with a photocatalytic film on an exterior, wherein the part of the exterior includes a display and an operation related to the operation of the equipment. In this case, the photocatalytic action of the device can be more effectively utilized without any practical problem even in a device used indoors.

According to a fifteenth aspect of the present invention, in addition to any one of the eleventh to fourteenth aspects, the method for inspecting an apparatus provided with a photocatalyst film on an exterior has an ultraviolet intensity applied to the exterior of 3 mW / It is characterized in that it is used in an environment of not more than cm ^2, and in this case, the device can be further installed and used at an appropriate distance from indoor lighting such as a fluorescent lamp in consideration of a living space.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a resin sheet having a photocatalytic film before printing formed on a surface according to a first embodiment of the present invention.

FIG. 2 is a front view showing a state in which a resin sheet is joined to the device after the printing process.

FIG. 3 is a cross-sectional view of the resin sheet after an adhesive layer is attached thereto.

FIG. 4 is a cross-sectional view of the resin sheet after an adhesive layer is attached thereto and heat pressing is performed.

FIG. 5 is a front view showing a state where the operation panel is attached to a predetermined position on the outer shell of the device.

FIG. 6 is a cross-sectional view showing a state where an end of the resin sheet is bent.

FIG. 7 is a cross-sectional view showing a state in which the embossed resin sheet is joined to an outer shell of the device.

FIG. 8 is a cross-sectional view showing a state where the resin sheet is joined to an outer shell of the device.

FIG. 9 is a front view showing a state in which the resin sheet is joined to an outer shell of the device.

FIG. 10 is a front view of an outer shell of a device showing another modification of the embodiment.

FIG. 11 is a sectional view of an outer shell of a device showing another modification of the above.

FIG. 12 is a front view of a rice cooker according to a second embodiment of the present invention.

FIG. 13 is a sectional view of the rice cooker.

FIG. 14 is a sectional view of a main part of the above.

FIG. 15 is a front view of a rice cooker showing another modification of the rice cooker.

FIG. 16 is a sectional view of a rice cooker showing another modification of the above rice cooker.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Resin sheet (sheet) 2 Titania layer (photocatalytic film) 4 Surface protective film (protective film) 11, 12, 13, 51 Character printing part (printing part) 21 Outer shell (exterior of equipment) 67 Transparent window part 75 Lid 76 Liquid crystal display A Cooked rice (steam source)

Claims (15)

[Claims] 1. An apparatus provided with a translucent photocatalyst film on an exterior thereof, wherein a photocatalyst film is provided at a position corresponding to the photocatalyst film to indicate that the photocatalyst film is provided. Equipment provided on the exterior. 2. A transparent window portion having a light transmitting property is provided at a predetermined position of the exterior, and the photocatalytic film having a hydrophilic property is formed on a surface of the transparent window portion on a device inner side. Item 6. An apparatus provided with the photocatalyst film according to item 1 on an exterior. 3. The device according to claim 2, wherein a heating means is provided inside the device. 4. The apparatus according to claim 2, further comprising a vapor generation source inside said apparatus. 5. The photocatalyst film according to claim 2, wherein an indicator for displaying an operation state of the device is provided inside the device facing the transparent window. Equipment installed on the exterior. 6. The apparatus according to claim 5, wherein the display is a liquid crystal display. 7. The apparatus according to claim 2, wherein the transparent window faces a closed space formed inside the device.
A device provided with the photocatalyst film according to any one of claims 6 on an exterior. 8. The device according to claim 7, wherein the closed space is provided in a lid of the device, and the indicator is provided in the closed space. 9. A light-transmitting photocatalytic film is formed on the surface of a light-transmitting sheet, and a printing section is provided on the back surface of the sheet to indicate that the photocatalytic film is provided. A device provided with a photocatalytic film on the exterior, the side of which is joined to the exterior of the device. 10. A light-transmissive photocatalytic film is formed on the surface of a light-transmissive sheet, and the surface of the photocatalytic film on the surface side of the sheet has a surface state such as color and unevenness which is different from that of the sheet. A different protective film is attached, and in a state where the protective film is attached, a predetermined design is printed on the back surface of the sheet, and the sheet is processed into a predetermined shape after printing. A method of manufacturing a device having a photocatalyst film provided on an exterior, comprising joining a back surface of a sheet, processing the sheet into a predetermined shape, and then peeling the protective film from a surface of the photocatalyst film. 11. A photocatalytic film having translucency and hydrophilicity,
Along with covering a part of the exterior of the device, a predetermined dirt is attached to the surface of the photocatalytic film coated on a part of the exterior, and the dirt part is soaked with water for a predetermined time or wetted with water,
A method for inspecting a device provided with a photocatalyst film on an exterior, wherein the presence or absence of the photocatalyst film is confirmed by the subsequent removal of dirt. 12. The inspection of a device provided with a photocatalyst film on an exterior thereof according to claim 11, wherein the photocatalyst film is coated on a part of the exterior facing the front of the device used indoors. Method. 13. A part of the exterior is an exterior surface seen from directly above the device.
2. A method for inspecting equipment provided with the photocatalyst film according to item 2 on an exterior. 14. The method for inspecting an apparatus provided with a photocatalytic film on an exterior according to claim 11, wherein a part of the exterior is an exterior surface on which display and operation relating to operation of the apparatus are performed. . 15. The ultraviolet light applied to the exterior has an intensity of 3
The method for inspecting a device provided with a photocatalytic film on an exterior according to any one of claims 11 to 14, wherein the device is used under an environment of mW / cm ² or less.