JPH08141063A - Illumination device with deodorizing function and deodorizing device - Google Patents

Abstract

PURPOSE: To provide an illumination device with deodorizing function and deodorizing device which have an excellent deodorizing effect, do not require maintenance and special equipment and are inexpensive. CONSTITUTION: This illumination device 1 with the deodorizing function includes a discharge lamp 3 formed with a fluorescent surface part 3b which is coated with a fluorescent coating material on its inside surface and is radiated with visible rays and a UV transmittable part 3a which is not coated with this fluorescent coating material and is radiated with UV rays of a wavelength of <=400nm on a glass tube and a reflection plate 2 which is arranged near this lamp and is coated with a photocatalyst in a part 2a facing the UV transmittable part of the lamp.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device with a deodorizing function and a deodorizing device for deodorizing various odors such as tobacco odors in offices, toilet odors in toilets, disinfecting odors in hospitals, and cooking odors in kitchens.

[0002]

2. Description of the Related Art In offices, homes, hospitals, etc., there are various odors such as tobacco odor, chemical odor, toilet odor, cooking odor, body odor, etc. The components of these odors are, for example, alcohols, ethers, skatole, India. There are various nitrogen compounds such as phenol, ammonia and amines, hydrogen sulfide, sulfur compounds such as methyl mercaptan, methyl sulfide and methyl disulfide, aldehydes and ketones.

Conventionally, in order to remove a bad odor, a container filled with activated carbon, zeolite or the like is placed in the room, or an adsorption method for incorporating an activated carbon or an activated carbon fiber into an air-conditioning facility to absorb a bad odor, or hydrochloric acid or caustic soda. -A method of absorbing with an acid such as da and an alkaline agent, a method of treating with chemicals such as ozone oxidation, and a method of locally masking with an aromatic odor masking agent are performed.

Recently, attempts have been made to irradiate titanium dioxide with ultraviolet rays to utilize the photochemical action of titanium dioxide for deodorization. Lamps such as germicidal lamps, ultraviolet lamps, and black lights are used for UV irradiation.

[0005]

However, the adsorption method using activated carbon or activated carbon fiber does not adsorb all malodorous components and has no effect on, for example, acetaldehyde. In addition, activated carbon and activated carbon fibers have a drawback that microorganisms that emit a musty odor are grown after saturated adsorption of odorous components.

The method of treating with a chemical solution using an acid or an alkali is not so effective for neutral gases such as methyl mercaptan and low boiling point components such as aldehydes and ketones.
Furthermore, the method of masking with a masking agent does not exclude the malodorous component itself.

Further, in the method of irradiating the titanium dioxide with ultraviolet rays by using a sterilizing lamp, an ultraviolet lamp, a black light, etc., as shown in FIG. 7, a quartz glass or a high-purity quartz glass is used so as to exclusively emit ultraviolet rays, especially ultraviolet rays B having a wavelength of 254 nm. It has the drawback that it is very expensive and cannot be used easily because it uses a tube made of silicic acid, such as glass, or an ultraviolet ray transmitting filter.

Further, all of these methods have drawbacks such as requiring human work, troublesome maintenance, new installation of special equipment, and high cost.

The present invention has been made in view of the above points, and an object thereof is to provide a lighting device with a deodorizing function and a deodorizing device which are excellent in deodorizing effect and do not require maintenance or special equipment and are inexpensive. There is.

[0010]

For this reason, in the lighting device with a deodorizing function of the present invention, a fluorescent coating is applied to the inner surface of a glass tube, and a fluorescent surface portion for emitting visible light and a fluorescent coating are provided. A discharge lamp which is not coated and has an ultraviolet ray transmitting portion which emits ultraviolet rays having a wavelength of 400 nm or less, and a reflection which is disposed in the vicinity of this lamp and which has a photocatalyst applied to the portion facing the ultraviolet ray transmitting portion. And a plate.

According to the studies by the present inventors, for the photochemical action of a photocatalyst such as titanium dioxide, the wavelength of ultraviolet rays emitted from a discharge lamp does not have to be 254 nm which is a germicidal ray, but 400 nm or less, for example, 300-. 400 nm
UV rays of 300 nm to 400 nm are more preferable, and more preferably 360 nm to 3 nm.
It turned out that ultraviolet rays with a wavelength of 80 nm are good.

Therefore, the tube of the discharge lamp does not use a special expensive material such as a sterilization lamp made of quartz or an ultraviolet lamp, but a soft glass containing sodium or potassium which is commonly used in a fluorescent lamp. Can be used.
In addition to these, borosilicate glass containing boron and glass commonly referred to as sterilizing glass containing high silica can also be used. Of course, these glasses can be
nm or less, or 300 to 400 nm to 360 nm to 3
The glass composition may be further adjusted so that ultraviolet rays having a wavelength of 80 nm are emitted.

The discharge lamp is preferably a low-pressure discharge lamp such as a low-pressure mercury lamp which easily emits ultraviolet rays, but a medium / high pressure discharge lamp can also be used. In the case of a low pressure mercury lamp,
Mercury and argon are enclosed in the tube, but in the case of a mercury lamp made of soft glass, the mercury vapor pressure is mainly 400 nm or less, or 300 to 400 nm from the UV transmitting part.
To mercury vapor pressure such that ultraviolet rays having a wavelength of 360 nm to 380 nm are emitted, for example, 10 ⁻³ to 10 ¹ mmHg,
It is preferably 1.5 × 10 ⁻³ to 50 × 10 ⁻³ mmHg.

The shape of the pipe may be an elongated round bar or a spherical shape, U.
The shape may be a letter and the shape does not matter. The same fluorescent material as that of a conventional fluorescent lamp may be used for the fluorescent paint.

The size of the fluorescent screen of the discharge lamp is determined by the required illuminance. For example, in the case of a straight tube, a fluorescent screen may be formed on one half of either the upper half or the lower half of the cross section orthogonal to the longitudinal direction of the tube, and the other may serve as the ultraviolet ray transmitting portion. Visible light is emitted from the fluorescent screen portion of the discharge lamp.

The reflection plate coated with the photocatalyst may have an open bottom surface or an open top surface, and may be a curved curved body. In the case of a reflector having an open lower surface, the fluorescent screen portion of the discharge lamp is arranged on the lower side so that the ultraviolet ray from the ultraviolet ray transmitting portion is not radiated downward in the presence of a person. Further, in the case of a reflector for indirect illumination having an open upper surface, the fluorescent screen portion of the discharge lamp is arranged on the upper side.

In the above discharge lamp, at least a part of the inner surface of the glass tube is coated with a fluorescent paint to form a fluorescent screen portion, and the other part is made transparent to ultraviolet rays. However, without coating the fluorescent paint. It is also possible to use a discharge lamp in which the entire glass part is UV transparent. In this case, the deodorizing device serves as a deodorizing device to be used in a room or place where there is no person and at night when there is no person.

In the case of the deodorizing device, the member provided with the photocatalyst and disposed in the vicinity of the discharge lamp may be a plate-like member or a concavo-convex member that surrounds the periphery of the discharge lamp like a cylindrical body. It may have a complicated surface. However, it is better not to completely seal it, but to provide an open portion in order to dissipate heat from the discharge lamp and to bring the air carrying the malodorous substance into contact with the member coated with the photocatalyst as much as possible.

In the room where the lighting device with the deodorizing device and the deodorizing device are arranged, air is circulated by the heat of the discharge lamp, but the deodorizing effect is improved if the air is forcedly circulated by the air conditioner or the like. To do.

As the photocatalyst for the lighting device with the deodorizing device and the deodorizing device, other photocatalysts such as iron oxide, bismuth oxide, zinc oxide and the like can be used in addition to titanium dioxide.

[0021]

The visible light emitted from the fluorescent portion of the discharge lamp has an illumination effect, and the ultraviolet rays emitted from the ultraviolet ray transmitting portion have a deodorizing effect. That is, when the ultraviolet rays radiated from the ultraviolet ray transmitting portion are applied to the reflecting surface of the reflection plate coated with the photocatalyst, the photocatalyst is photoexcited and oxygen in the air becomes active oxygen or hydrogen peroxide, and its strong oxidizing power causes a bad odor. It oxidizes and decomposes substances. Further, the photocatalyst itself also has a function of adsorbing a malodorous substance, and the adsorbed malodorous substance is oxidatively decomposed by active oxygen or hydrogen peroxide. The deodorizing action is promoted by natural or forced circulation of indoor air.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an example of a lighting device with a deodorizing function of the present invention.
And two low-pressure mercury lamps (hereinafter referred to as lamps) 3. The reflection plate 2 is made of, for example, a metal, and titanium dioxide is applied to the inner surface 2a as a photocatalyst. Titanium dioxide is white and is applied to a thickness of, for example, 10 μm.
It should be noted that illustrations of sockets and other electric parts are omitted.

Each lamp 3 is 40 W and its length is about 130.
cm. The lamp 3 is made of a soft glass tube, and the mercury vapor pressure in the tube is 7 × 10 ⁻³ mmHg. Lamp 3
In the cross section orthogonal to its longitudinal direction, the upper half portion forms the ultraviolet ray transmitting portion 3a, and the inner surface of the lower half portion is coated with fluorescent paint to form the fluorescent surface portion 3b. The size of the lamp and the reflector can be appropriately selected depending on the conditions such as the place of installation.

The specific energy distribution of the generated wavelength of the lamp 3 is as shown in FIG. 2, and ultraviolet rays having a wavelength of 400 nm or less are emitted from the ultraviolet ray transmitting portion. Especially from 380 nm to 3
A large amount of 60 nm ultraviolet light A is radiated from the ultraviolet light transmitting portion 3 a of the lamp 3.

FIG. 3 shows another example of the lighting device with a deodorizing function of the present invention, which is used for indirect lighting. In FIG. 3, the reflecting plate 6 of the illuminating device 5 is curved in an upward semicircular shape, and the inner surface 6a thereof is coated with titanium dioxide.
The lamp 3 is the same as that of FIG. 1, but is different from that of FIG. 1 in that the fluorescent screen portion 3b is on the upper side and the ultraviolet ray transmitting portion 3a is on the lower side. The reflection plate 6 is arranged so that its opening surface faces the ceiling surface, and the visible light emitted from the fluorescent screen portion 3b of the lamp 3 hits the ceiling surface and is reflected and emitted obliquely downward to illuminate the lower side. On the other hand, the ultraviolet rays emitted from the ultraviolet ray transmitting portion 3a of the lamp 3 are the inner surface 6a of the reflecting plate 6.
The titanium dioxide has the same deodorizing function as described above.

In the apparatus shown in FIGS. 1 and 3, a deodorizing apparatus can be obtained by using a lamp in which the entire tube is made transparent to ultraviolet rays without applying fluorescent paint. That is, in the illuminating device, a fluorescent screen portion is formed in a part of the lamp so that visible light is also emitted, but it is not necessary to illuminate, and in the place where deodorization is exclusively required, the lamp is entirely made of an ultraviolet-transparent tube. You can put on. In the case of FIG. 3, titanium dioxide may be applied to the ceiling surface above the deodorizing device, or a member such as a plate applied may be arranged.

FIG. 4 shows another deodorizing device. This deodorizing device 7 is provided with a lamp 8 whose entire tube is transparent to ultraviolet rays, and a member whose inner surface 9a is coated with titanium dioxide, which is a cylindrical body 9 in this case. I will do it.

[0028]

[Test Example 1] Two 40 W lamps are arranged, and the deodorizing function lighting fixture 1 of FIG. 1 having a titanium dioxide coating area of the reflecting plate of 4000 cm ² is installed on the ceiling of a room 5 cm long and 3 m high. Then, methyl mercaptan gas as a malodorous substance is constantly injected into the room so that its concentration is 20 ppm,
An air conditioner for 10 tatami mats without a deodorizing function was operated, and a change in the concentration of methyl mercaptan gas over time was measured with the lighting device 1 with a deodorizing function turned on and off. Further, the measurement was carried out in a state where the container containing 30 kg of activated carbon was placed in the room and the deodorizing function-equipped lighting fixture 1 was removed. The result is shown in FIG.

[0029]

Test Example 2 Under the same conditions, hydrogen sulfide H ₂ S as a malodorous substance was constantly injected into the room so that the concentration was 30 ppm, and the change with time of the concentration was measured. The result is shown in FIG.

From Test Examples 1 and 2, it can be seen that the deodorizing ability significantly decreases with time when activated carbon is used. On the other hand, when the lighting device with a deodorizing function of the present invention is turned on, the deodorizing effect is excellent and the deodorizing ability hardly decreases even after a lapse of time. Also, even if the lighting equipment with a deodorizing function is turned off, it can be seen that the malodorous substances are considerably adsorbed by the titanium dioxide.

[0031]

The lighting apparatus with a deodorizing function of the present invention can perform two functions of lighting and deodorizing at the same time, and can perform deodorizing while illuminating even in the presence of a person. Further, it can be installed at the position of a conventional lighting fixture, and no special equipment is required. Further, since the lighting device is attached to the ceiling or the like, the warmed air in the room always circulates to the ceiling surface, so that the deodorizing efficiency is good. In addition, the heat dissipation of the lamp itself causes air circulation. Of course, if the air is forcibly circulated, the deodorizing effect efficiency is further improved.

Further, it is not necessary to use an expensive tube made of a special material such as a germicidal lamp or a black light to emit ultraviolet rays having a specific wavelength or to provide a mechanism, and a conventional fluorescent lamp such as soft glass is used. It is possible to use inexpensive materials that are widely used in, and most of the production lines for fluorescent lamps can be used, so the manufacturing cost can be reduced, and it can be used as easily as conventional fluorescent lamps.

Further, the lighting equipment with a deodorizing function of the present invention is
It only needs to be mounted on the ceiling and used normally as a lighting device, and no special work or maintenance is required.
It can also be used for most malodorous substances, such as being effective for malodorous substances that could not be deodorized by the conventional deodorizing method using activated carbon or the like.

On the other hand, the deodorizing device of the present invention also has the same effects as described above except that there is no lighting effect.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a lighting fixture with a deodorizing function of the present invention.

FIG. 2 is a diagram showing a specific energy distribution of generated wavelengths of a lamp used in a lighting fixture with a deodorizing function.

FIG. 3 is a diagram showing another example of a lighting device with a deodorizing function.

FIG. 4 is a diagram showing an example of a deodorizing device.

FIG. 5 is a diagram showing measurement results of Test Example 1.

FIG. 6 is a diagram showing measurement results of Test Example 2.

FIG. 7 is a diagram showing a specific energy distribution of wavelengths generated by a conventional germicidal lamp.

[Explanation of symbols]

 1 Lighting equipment with deodorizing function 2 Reflector 2a Inner surface 3 Discharge lamp (lamp) 3a UV transmitting part 3b Fluorescent surface part 5 Lighting equipment with deodorizing function 6 Reflector 6a Inner surface 7 Deodorizing device 8 Discharge lamp (lamp) 9 Photocatalyst is applied Inside member (cylindrical body) 9a

Claims (3)

[Claims] 1. A glass tube comprising a fluorescent surface portion coated with a fluorescent coating on its inner surface to emit visible light, and an ultraviolet transparent portion not coated with the fluorescent coating and emitting ultraviolet rays having a wavelength of 400 nm or less. A lighting device with a deodorizing function, comprising: a discharge lamp in which a lamp is formed; and a reflecting plate, which is disposed in the vicinity of the lamp and has a photocatalyst applied to a portion of the lamp facing an ultraviolet ray transmitting portion. 2. The deodorizing apparatus according to claim 1, wherein a fluorescent screen is formed on one half of either the upper half or the lower half of the discharge lamp, and the other is transparent to ultraviolet rays. Illumination device with functions. 3. The entire glass tube is 40% UV transparent.
A discharge lamp that emits ultraviolet light having a wavelength of 0 nm or less,
A deodorizing device, characterized in that, in the vicinity of the lamp, a member having a photocatalyst applied to a portion facing the lamp is arranged so as to completely or partially cover the lamp.