JP3065532B2 - Closed lighting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a closed-type lighting device used for lighting a clean room or a working room for performing various processes such as experiments, researches and manufacturing in the fields of medicine, food, medicine, semiconductor and precision industry. About.

[0002]

2. Description of the Related Art In a clean room, the degree of cleanliness (class 100 to class 100000) is set according to the use and the like, and the equipment installed in each clean room is required to have specifications that can ensure the degree of cleanliness. .

[0003] Lighting equipment used for lighting in such a clean room is generally of a sealed type, and as the sealed lighting equipment, for example, a housing is provided inside a box-shaped equipment main body having only a front opening. A structure in which light sources such as light lamps are arranged. After the main body of the equipment is installed in the burial hole provided in the ceiling wall or side wall of the clean room, the front opening of the main body is closed with a sealing cover (front glass, etc.). Things are widely used.

[0004]

In a closed-type lighting fixture installed in a clean room, maintenance such as replacement of a lamp is performed by opening a closed cover. When the closed cover is opened, germs spread and the inside of the clean room is diffused. If the clean room is contaminated with germs, it may adversely affect the research target and products.In the worst case, stop the experiment and production for a long time. Lighting fixtures that reduce the possibility of such contamination must be taken, such as returning the clean room to a usable degree of cleanliness, and the downtime may cause a decrease in experimental and production efficiency. Has also been required.

[0005] The cause of bacteria entering the closed-type lighting fixture may be, for example, that when the lighting fixture is manufactured, the bacteria attach to the inner surface of the fixture body, the inner surface of the sealing cover, or the like.
In addition, when the lamp is mounted in a clean room, germs may adhere to the inner surface of the appliance, and when the lamp is replaced, the germs may adhere to the inner surface of the appliance, the lamp, or the like.

The present invention has been made in view of such circumstances, and relates to a lighting device used in a clean room or the like. It is an object of the present invention to provide a closed-type lighting device having a structure less than that of a conventional lighting device.

[0007]

First, titanium oxide is coated on the surface of a material such as glass or a metal plate, and when the titanium oxide film is irradiated with ultraviolet light, active oxygen is generated by photoexcitation to remove surrounding contaminants. It is known that it has effects such as decomposition and sterilization of bacteria (for example, see Japanese Utility Model Publication No. 2-40986).

The present invention utilizes such a photocatalytic reaction of titanium oxide, in which a light source such as a fluorescent lamp is housed inside an appliance body, and a front opening of the appliance body is formed by a front glass and a front frame. In a sealed lighting device having a covering structure, titanium oxide or the like is applied to at least a part of a portion of the lighting device, which is irradiated with light emitted from the illumination light source, to form a photocatalyst in the lighting device. For example, ultraviolet rays contained in the emission light of a fluorescent lamp are used as excitation light for a photocatalyst, and a photocatalytic reaction is generated inside the fixture at the time of use, thereby sterilizing germs entering the lighting fixture. .

When a fluorescent lamp is used as a light source in the lighting apparatus of the present invention, the amount of ultraviolet light contained in the emitted light is very small, so that the progress of the photocatalytic reaction in the apparatus is not very fast. And fluorescent lamp life (1
Taking into account about 0000 hours), it is possible to obtain a sufficient sterilizing effect by the time the lamp is replaced.

Here, the term "titanium oxide or the like" as used in the present invention refers to a titanium oxide alone, a mixed compound obtained by mixing an oxide or a hydroxide of an alkali metal or the like with titanium oxide, potassium tetratitanate, hexatitanate. Complex metal compounds such as potassium,
And, zinc oxide showing a photocatalytic reaction similar to titanium oxide,
The mixed / composite metal compound of zinc oxide.

The light source used in the lighting fixture of the present invention may be any one that emits ultraviolet light having a wavelength of 400 nm or less. In addition to a fluorescent lamp, for example, a germicidal lamp,
Examples include low-pressure / high-pressure mercury lamps, black lights, optics / insect trap lamps, diazo copier lamps, xenon lamps, metal halide lamps, high-pressure sodium lamps, halogen lamps, and the like.

Further, in the present invention, the portion to be coated with titanium oxide or the like may be an inner surface of a front glass, an inner surface of an appliance body, an inner surface of a front frame, or a surface of a light source socket. Or, if titanium oxide or the like is applied to two or more surfaces, the intended purpose can be achieved, but if it is intended to obtain a higher sterilization effect, apply titanium oxide or the like to all of those surfaces. It is preferable to keep it.

Furthermore, when the present invention is applied to a sealed lighting apparatus having a structure in which a reflector is provided on the back side of a light source, titanium oxide or the like may be applied to the reflection surface of the reflector.

[0014]

FIG. 1 is a partial longitudinal sectional view showing the structure of an embodiment of the present invention, and FIG. 2 is an enlarged view of a portion A in FIG.
FIG. 3 is an external perspective view of the embodiment.

The appliance main body 1 is made of a steel plate and is processed into a rectangular box shape having an opening only on the front surface, and a flange 1b is integrally formed on the periphery of the opening 1a. Inside the instrument body 1, two pairs of sockets 2 and 2 facing each other are arranged, and on the back side of the socket 2, a reflector 3 is arranged. It is supported by the instrument body 1 via 2a.

The light source of the luminaire of this embodiment is a fluorescent lamp L of a straight tube type, both ends of which are supported by sockets 2 and 2. In this luminaire, a ballast 4 is disposed inside the luminaire 1 on the back side of the reflector 3.

On the other hand, the front glass 5 is fitted into the front frame 6 with a rectangular plate material formed by processing tempered glass into a shape and size substantially equal to the opening 1a of the appliance body 1. The front frame 6 is a member formed by processing a stainless steel plate into a rectangular frame shape, and a hanging hook 7 is fixed to the back side (inside of the appliance). The hanging hooks 7 are provided at two opposite sides (long sides) of the front frame 6 at positions corresponding to each other, and the four hanging hooks 7 are hooked on spring hinges 8 provided in the instrument body 1. , The front frame 6 to the instrument body 1,
Can be mounted in a state where the four sides are pressed toward the flange 1b.

In the above structure, the packing 9 is sandwiched between the inner peripheral edge of the front glass 5 and the front frame 6, and the four sides of the front frame 6 and the flange 1 of the instrument body 1 are further inserted.
A gasket 10 is sandwiched between the gasket b and the gasket 9, and the airtightness in the instrument body 1 is maintained by the packings 9 and 10 in a state where the front frame 6 is attached to the instrument body 1.

The apparatus main body 1 having the above structure is inserted from a room side into an embedding hole 101a provided in a ceiling wall (construction material) 101 of a clean room, and is inserted into a slab (not shown) or the like above the embedding hole 101a. It is supported via a suspension bolt 102. A gasket 11 for maintaining airtightness is sandwiched between the flange 1b of the instrument body 1 and the ceiling wall 101.

The present embodiment is characterized in that a coating film TF of titanium oxide is formed in a portion of the apparatus where the light emitted from the fluorescent lamp L shines. The thickness of the titanium oxide coating film TF is several μm.
m. As shown in FIG. 1 and FIG. 2, the specific portion of the coating is the entire inner surface of the front glass 5, the area B where the light from the fluorescent lamp L shines on the inner surface of the fixture body 1, and the inner surface of the front frame 6. Similarly, the areas C and D to which light is applied, the entire front surface (reflection surface) of the reflection plate 3, and the surface of each socket 2 to which light from the fluorescent lamp L is applied.

As described above, by coating titanium oxide on almost all of the surface on which the emission light of the fluorescent lamp L shines inside the apparatus, the area of the portion functioning as a photocatalyst becomes large, and the photocatalytic reaction occurs. As a result, various germs that have entered the lighting fixture during the manufacture and construction of the fixture and when replacing the lamp are efficiently sterilized during use of the fixture, and the interior of the fixture becomes almost aseptic by the time the lamp is replaced.

In the above embodiment, it is preferable that the lighting of the fluorescent lamp L be continuously turned on in order to enhance the sterilizing effect. However, the lighting time of the fluorescent lamp L may be changed depending on the use conditions of the clean room. Even if the time is limited to a predetermined time in a day, the same effect as in the case of continuous lighting can be achieved if the accumulated lighting time is the same.

In the above-described embodiment, an example of a lighting device having a rectangular box-shaped lighting device main body is shown. However, the present invention is not limited to this. Is also applicable.

In the above embodiment, a spring hinge method is used as a means for fixing the front frame 6 to the instrument body 1, but instead of this, the front frame is attached to the instrument body using bolts, for example. Other known fixing means such as fixing to the main body may be used.

Further, the present invention can be applied to a lighting apparatus having a structure in which a reflecting plate is not provided on the back side of a light source such as a fluorescent lamp. It goes without saying that the present invention can be applied to three or more lighting fixtures.

[0026]

As described above, according to the present invention,
Titanium oxide is applied to the part of the enclosed lighting fixture used in the clean room, etc. where the light emitted from the illumination light source hits, so that a photocatalytic reaction occurs inside the fixture during use. Sometimes, even if germs enter the fixtures, the germs are sterilized by active oxygen generated by ultraviolet irradiation on titanium oxide, etc., and when the lamp is replaced, the interior of the lighting fixture will be in a clean state, Even if germs enter the fixture when replacing the lamp, the interior of the lighting fixture will be clean by the next lamp replacement. As a result, it is possible to provide a closed-type lighting device that is less likely to affect the cleanliness of a clean room or the like.

[Brief description of the drawings]

FIG. 1 is a partial longitudinal sectional view showing a structure of an embodiment of the present invention.

FIG. 2 is an enlarged view of a portion A in FIG.

FIG. 3 is an external perspective view of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Instrument main body 1a Opening 1b Flange 2 Socket 3 Reflector 4 Ballast 5 Front glass 6 Front frame 7 Hanging hook 8 Spring hinge 9,10,11 Packing L Fluorescent lamp TF Titanium oxide coating film

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F21V 25/12 F21V 3/04 F21V 7/22 F21V 31/00-31/02

Claims (6)

(57) [Claims] 1. A container-shaped appliance main body having only an open front surface, a light source housed in the appliance main body, a front glass having a shape covering a front opening of the appliance main body, and the front glass being attached to the appliance main body. On the other hand, in a lighting fixture having a front frame for detachable attachment, and having a structure in which the inside of the fixture is kept airtight in a state where the front glass and the front frame are attached, radiation from the light source shines inside the fixture. A sealed lighting device characterized in that at least a part of the portion is coated with titanium oxide or the like. 2. The closed-type lighting device according to claim 1, wherein titanium oxide or the like is applied to an inner surface of the front glass. 3. The closed-type lighting device according to claim 1, wherein titanium oxide or the like is applied to an inner surface of the device main body. 4. The closed-type lighting device according to claim 1, wherein titanium oxide or the like is applied to an inner surface of the front frame. 5. The closed-type lighting device according to claim 1, wherein titanium oxide or the like is applied to a surface of the light source socket. 6. The lighting device according to claim 1, wherein a reflection plate is provided on the back side of the light source inside the lighting device main body, and titanium oxide or the like is applied to a reflection surface of the reflection plate. Sealed lighting equipment.