JPH10214599A - Fluorescent lamp and luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sufficiently exhibit a photocatalyst effect, clean the environment during lighting a fluorescent lamp and keep a required print display function by forming a photocatalyst film capable of producing a catalytic effect with an ultraviolet ray over the peripheral face of the fluorescent lamp except for a region where an imprinted mark is put. SOLUTION: A photocatalyst film 6 is formed over the entire peripheral face (outer surface) of a light emitting tube 1 except for a mark printed region 5. The photocatalyst film 6 is made of, e.g. TiO2 (titanium oxide), ZnO(zinc oxide) or the like, more particularly, of anatase TiO2 particles and SiO2 particles (binder component) having an average particle diameter of 1μm or less. Consequently, it is possible to efficiently oxidize/decompose odor, organic substance or the like which contaminates the environment and clearly keep a printed mark. Furthermore, display of the standard of a fluorescent lamp in use can be kept, thereby facilitating maintenance or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a fluorescent lamp and a lighting device having a photocatalytic film.

[0002]

2. Description of the Related Art For example, living spaces such as houses and offices have a high degree of airtightness, and there are issues such as air purification, deodorization and sterilization (sterilization) in these living environments. As a countermeasure, research and development of a photocatalyst air cleaning means and the like are known. That is, a film of a substance having a photocatalytic action (for example, TiO ₂ ... Titanium oxide, titania) is integrally provided on the outer peripheral surface (outer surface) of a discharge lamp containing mercury or the like that emits ultraviolet rays by discharge. Discharge lamps are known (JP-A-1-169866).
JP, No. 2545727). A discharge lamp of this kind, such as TiO ₂ film having a photocatalytic activity provided on the outer peripheral surface, when subjected to ultraviolet light emitted (radiated) from inside the discharge lamp, for exhibiting a strong oxidizing power, on the TiO ₂ surface Oxidation of attached substances, such as odor generating substances such as acetaldehyde, methyl mercaptan, hydrogen sulfide, and ammonia
Promotes decomposition. Therefore, attempts have been made to prevent air pollution, sterilize various germs and germs in the air in hospitals, and treat wastewater in water purification plants. In the case of fluorescent lamps, it is usually considered to minimize the emission of ultraviolet light outside the fluorescent lamp.
A small amount of 65 nm ultraviolet light is emitted. Utilizing this emitted ultraviolet light, a photocatalytic film such as TiO ₂ is formed on the outer surface of a fluorescent lamp for general illumination, and in addition to the function as a light source for illumination, the ultraviolet light emitted from the fluorescent lamp
Attempts have been made to excite TiO _{2 and the} like to have a photocatalytic effect.

[0003]

In fluorescent lamps for general lighting, clear indications such as standards and types are usually printed not only on the packaging but also on the fluorescent lamp itself. And
This fluorescent lamp is printed by marking on the outer peripheral surface of the discharge vessel. However, when the print mark is formed on the photocatalyst film surface or when the photocatalyst film is formed on the print mark, the print mark using the organic ink as a material may disappear. . In other words, the organic ink is decomposed and deteriorated by the oxidizing action of the photocatalytic film,
There is a problem that the print mark fades with the passage of time such as a lighting use process.

In addition, an adhesive containing an organic material is often used to attach the base, and if the photocatalytic film is formed up to the vicinity of the base, the adhesive is decomposed and deteriorated, and the base is dropped. It is also a concern that the

The present invention solves the above problems,
An object of the present invention is to provide a fluorescent lamp and an illuminating device which exhibit a sufficient photocatalytic action and have a required print display function.

[0006]

According to the first aspect of the present invention, there is provided a light-transmitting discharge vessel in which mercury and a rare gas are sealed;
An electrode means for generating a discharge in the discharge vessel; a base provided with an external input terminal connected to the electrode means; a marking mark provided on an outer peripheral surface of the discharge vessel; excluding an area provided with the marking mark. A photocatalytic film formed on the outer peripheral surface of the discharge vessel and catalyzing by receiving ultraviolet rays; and a phosphor layer provided on the inner wall surface of the discharge vessel and excited by ultraviolet rays generated by discharge to emit light. is there.

The electrode means of the fluorescent lamp may be of a type provided inside a discharge vessel or an electrodeless type provided outside a light-transmitting airtight vessel. Also, a mixture of mercury and a rare gas in the discharge gas can be used,
It is not limited to these as long as ultraviolet rays are generated by discharge. Further, the adhesive for the base is generally a cement system prepared by adding and mixing stone powder or the like into a phenol resin solution, but is not limited thereto, and a well-known adhesive can be applied.

According to a second aspect of the present invention, there is provided a light-transmitting discharge vessel in which mercury and a rare gas are sealed; electrode means for generating a discharge in the discharge vessel; and an external input terminal connected to the electrode means. A photocatalyst film formed on the outer peripheral surface of the discharge vessel excluding the vicinity of the cap and performing a catalytic action by receiving ultraviolet rays; provided on the inner wall surface of the discharge vessel and excited by ultraviolet rays generated by discharge And a phosphor layer which emits light.

A third aspect of the present invention is the fluorescent lamp according to the first or second aspect, wherein the photocatalytic film is formed of TiO ₂ having anatase type as a main component. According to a fourth aspect of the present invention, in the fluorescent lamp according to any one of the first to third aspects, the marking mark is provided in a region near the base of the discharge vessel.

According to a fifth aspect of the present invention, there is provided a lighting device comprising: a fixture main body; and the fluorescent lamp according to any one of claims 1 to 4 detachably mounted on the fixture main body. It is a device.

In the present invention, the fluorescent lamp is a general fluorescent lamp for illumination, and its shape is a straight tube type or a curved tube type. As the curved tube type, for example, a form in which one light-transmitting valve is bent, or a plurality of valves or a plurality of straight tube valves are joined at connected portions, and both ends are paralleled to form one bent. An annular, U-shaped, W-U-shaped, H-shaped or the like forming a discharge path may be used.
Therefore, the base provided in the fluorescent lamp according to the present invention,
Any appropriate form and structure may be adopted according to the form of the fluorescent lamp, and the material may be plastics such as PBT (polybutylene terephthalate) or metal.

Further, the photocatalytic film is made of, for example, WO ₃ , LaRhO ₃ , FeTiO ₃ , Fe ₂ O ₃ , CdFe ₂ O in addition to the TiO _2.
4 , fine particles of a compound (or substance) having a photocatalytic action such as SrTiO ₃ , CdSe, GaAs, GaP, and RuO ₂ , or a mixed system of two or more kinds of fine particles, and a binder component such as SiO ₂ . The thickness of the photocatalytic film is preferably about 1 to 10 μm in the case of the optical film type, and fine particles having an average particle diameter of about 0.007 to 0.05 μm in the case of the fine particle film type. In forming the photocatalytic film, it is necessary to selectively avoid the print mark area,
Generally, the following measures are taken.

(A) First, a photocatalyst film is formed entirely on the outer peripheral surface of a light-transmitting airtight container (for example, a glass tube), and then the photocatalyst film in the mark printing area is selectively peeled off and removed.

(B) The width in the tube axis direction is adjusted, and a light-transmitting airtight container (for example, a glass tube) is rotated in the solution for forming a photocatalyst film so that the photocatalyst covers the entire surface except a part of the outer peripheral surface. Apply, dry and bake a solution for film formation. In other words, by setting the width of the photocatalyst film forming solution so that the mark printing area on one end side of the translucent airtight container does not immerse or come into contact with the solution, there is no photocatalyst film in the mark printing scheduled area. It can be an airtight container. The photocatalyst film may be provided directly on the outer peripheral surface of the hermetic container.

According to the first aspect of the present invention, since the outer peripheral surface of the fluorescent lamp has the photocatalytic film that receives ultraviolet rays and performs a catalytic action,
While the fluorescent lamp is lit, the environment can be cleaned,
The print marks are also kept sharp.

According to the second aspect of the present invention, the risk of detachment of the photocatalytic film can be eliminated, and the environment can be cleaned under the lighting of the fluorescent lamp without oxidation or deterioration of the adhesive in the base. Can be

According to the third aspect of the invention, the operation of the first or second aspect of the invention is further promoted.

According to the fourth aspect of the present invention, since the light emitting surface and the photocatalytic surface are used effectively when used as a light source for illumination, environmental cleanup and the like are further promoted. According to the fifth aspect of the present invention, since the fluorescent lamp according to the first to fourth aspects is employed, the deodorant and the sterilization (sterilization) are performed while properly using the light source for general illumination. obtain.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described below with reference to FIGS. 1 (a), 1 (b), 2 and 3. FIG.

FIG. 1A is a cross-sectional view showing a configuration of a main part of the first embodiment, and FIG. 1B is a cross-sectional view showing a partly enlarged view.

The fluorescent lamp is a low-pressure mercury vapor discharge lamp with a rated power of 37 W indicated as FL40SS in JIS standard,
Reference numeral 1 denotes a light-emitting tube as a light-transmitting airtight container having a straight tube shape. The light-emitting tube 1 has a bulb outer diameter of about 28 mm, a tube length of about 1198 mm, and transmits ultraviolet light of 300 nm or more. For example, it is formed of soda lime glass.
The two ends of the arc tube 1 are sealed with stems 2 and 2, and the stems 2 and 2 have lead wires 3 and 3.
Are airtightly pierced. Further, filament electrodes 4, 4 as electrode means formed in a double coil by a tungsten wire or the like are attached to the lead wires 3, 3, and an emitter (not shown) is applied.

Further, the outer peripheral surface (outer surface) of the arc tube 1
Has a photocatalytic film 6 over the entire surface except for the mark printing area 5.
Are formed. Here, the photocatalyst film 6 is, for example, T
It is made of iO ₂ (titanium oxide), ZnO (zinc oxide) or the like. In this embodiment, anatase type TiO ₂ fine particles having an average particle size of 1 μm or less (for example, 0.05 to 0.2 μm) and SiO ₂ fine particles (binder component) are used. ) System. The photocatalyst film 6 containing TiO ₂ as a main component is
This is a suspension prepared by dispersing TiO ₂ powder and SiO ₂ powder having an average particle diameter of 0.05 μm in a mixed solvent of butyl acetate and butyl alcohol, and is a mark printing on one end side of the arc tube 1. The outer peripheral surface is immersed and rotated in a suspension tank partitioned in the tube axis direction so as to remove the region 5, and applied to the outer peripheral surface (outer surface) other than the above-mentioned removed portion to an average thickness of 1 μm, and dried (150). C. for about 5 minutes).

Further, in this embodiment, the phosphor layer 7 which is excited by ultraviolet rays emitted from mercury and is converted into visible light is converted into, for example, a three-wavelength luminescent phosphor and ultraviolet rays emitted from mercury. It consisted of a mixture of phosphors emitting ultraviolet light between 300 nm and 400 nm. Here, as the three-wavelength light emitting phosphor, for example, as a red phosphor having a peak wavelength near 610 nm, (Y, Gd) BO ₃ : Eu, 540 nm
CaPO ₄ , 4 as a green phosphor having a peak wavelength near
BaMgAl as a blue phosphor having a peak wavelength near 50 nm
₁₄ O ₂₃ : Eu is used. As the ultraviolet light emitting phosphor, at least one or more of europium-activated alkaline earth metal borates, lead-activated silicates, europium-activated alkaline earth metal aluminates, and phosphors in which halogen is added to these are used. Used. As a europium-activated alkaline earth metal borate, for example, Sr ₂ , B ₂ , O ₇ : Eu ²⁺ having a peak wavelength at 368 nm is effective, and a lead-activated silicate has a peak length at 370 nm ( Ba, Sr, Mg)
₃ Si ₂ O ₇ : Pb ²⁺ or BaSi ₂ O with a peak wavelength at 350 nm
₅ : Pb ^{2+ and the} like are preferable, and as the europium-activated alkaline earth metal aluminate, those having a peak wavelength of 358 to 360 nm are effective. Note that Sr ₂ B ₂ O ₇ : Eu ²⁺ is used as the ultraviolet light emitting phosphor, and the mixing ratio thereof is 1 to 10% by mass of the phosphor layer 7.

Further, a predetermined amount of mercury and an inert gas such as argon gas are sealed in the arc tube 1, and a cap 9 having a cap pin 8 protruding from an end of the arc tube 1; 9 are applied. The base pin 8 is connected to the filament electrode (discharge electrode) via the lead wire 3.
4, 4 are connected.

The fluorescent lamp 10 having the above-described structure is, for example, shown in FIG.
A lighting fixture can be configured by attaching to a lighting fixture body as shown in FIG. That is, in FIG. 2, reference numeral 11 denotes a main body of a ceiling-mounted lighting fixture, and lamp sockets 12, 12 are arranged at both longitudinal ends of the lighting fixture main body 11 so as to face each other. The fluorescent lamp 10 is mounted between the sockets 12 and 12 by engaging the base pins 8 of the bases 9 and 9 to constitute a lighting fixture. The lighting fixture body 11 has a ballast for turning on the fluorescent lamp 10.
A lighting circuit including the fluorescent lamp 10 is housed therein.
Is turned on via the ballast 13.

Next, the operation of the fluorescent lamp and the luminaire having the above-described configuration will be described.

When the fluorescent lamp 10 is turned on, the arc discharge between the electrodes 4 and 4 causes mercury vapor to be generated at 185 nm and
The ultraviolet light of 54 nm is emitted, and this ultraviolet light excites the fluorescent layer 7. In this case, the phosphor layer 7 includes a three-wavelength light emitting phosphor and
Since the phosphor that emits ultraviolet light having a wavelength of 300 to 400 nm is formed as a mixture, the three-wavelength light-emitting phosphor emits visible light having a peak wavelength in three wavelength regions, and the ultraviolet light-emitting phosphor emits ultraviolet light of 300 to 400 nm. Emit. Then, the visible light emitted by the three-wavelength light emitting phosphor passes through the wall of the arc tube 1, passes through the titanium oxide film 6, and is emitted to the outside,
Since a predetermined amount of visible light is obtained, it is possible to illuminate a predetermined brightness.

On the other hand, when the ultraviolet light emitting phosphor is 300 nm to 400 nm
This ultraviolet ray passes through the wall of the arc tube 1 and reaches the photocatalyst film 6 containing TiO ₂ as a main component. For this reason, TiO ₂ absorbs ultraviolet rays, generates electrons and holes inside the TiO ₂ by photocatalysis, and also moves these holes to cause an electron transfer reaction on the surface, and this hole has almost a band gap (3.0 eV). It has the power to pull out electrons by the energy of the minute, that is, the oxidizing power, and oxidizes the substance attached to the surface. At this time, the TiO ₂
Since the surface of the photocatalyst film 6 mainly composed of is composed of a form exhibiting catalytic activity, it functions to efficiently oxidize and decompose odors and organic substances that pollute the environment.

For example, odor (acetaldehyde concentration 13
The lighting device was turned on in a closed atmosphere having a concentration of (00 ppm) and the change in the lighting time and the acetaldehyde concentration was measured. It was confirmed to be presented. On the other hand, the display mark 5 'printed and displayed on the outer peripheral surface of the arc tube 1 of the fluorescent lamp 10 does not show fading due to peeling off or falling off of the display mark 5', and the required display function is sufficiently maintained. Was.

According to the fluorescent lamp 10, the required visible light is emitted as a light source for illumination, and the T
It also functions as a UV light source for the iO ₂ film 6, and can realize illumination and air purification of a living space such as a house or office with a single fluorescent lamp, and a comfortable living environment can be obtained. In addition, even if dust, tobacco tar, oil and fat components are to be deposited on the outer surface of the fluorescent lamp, the TiO ₂ film 6 prevents the adhesion of these substances due to the oxidative decomposition action. On the other hand, since the standard display and the like of the fluorescent lamp are kept clear, the maintenance is also facilitated in combination with the prevention of a decrease in the luminous flux due to the above-mentioned catalytic action and the necessity of wiping and cleaning the fluorescent lamp.

Although a straight tube fluorescent lamp has been described above, a general annular fluorescent lamp, as shown in FIG.
(b) and (c) show a perspective view of the arc tube, respectively.
The same applies to fluorescent lamps in the shape of a letter or W-U.

The present invention is not limited to the structure of the above embodiment. That is, in the above embodiment, a three-wavelength light emitting phosphor was used as the phosphor that emits visible light. However, the present invention is not limited to this, and calcium halophosphate phosphors and other ordinary phosphors used in fluorescent lamps are used. It may be a phosphor.

Furthermore, as the substance exhibits a photocatalytic activity, the TiO2 (titanium oxide), in addition to ZnO (zinc oxide), CeO ₂ (cerium oxide), Tb2 O ₃ (terbium oxide), MgO (magnesium oxide), er2 O ₃ (erbium oxide), or mixtures of two or more systems, further it may take the form of a mixture, such as zeolites.

[0034]

According to the first aspect of the present invention, the outer peripheral surface of the fluorescent lamp has a photocatalyst film that acts as a catalyst by receiving ultraviolet rays, while the printed marks provided on the outer peripheral surface are also sharply retained. In other words, the fluorescent lamp contributes to environmental cleansing and the like while the lamp is lit, and at the same time, the display of the standard of the fluorescent lamp used can be leaned, so that maintenance and the like can be facilitated.

According to the second aspect of the present invention, the risk of separation of the photocatalyst film, separation and deterioration of the printed mark, and deterioration of the adhesive at the base is eliminated, and the effect of the first aspect is more stably obtained. Can be

According to the invention of claim 3, the effect of the invention of claim 1 or 2 is further promoted.

According to the fourth aspect of the present invention, the photocatalytic function functions as a fluorescent lamp that performs more efficiently, such as cleaning the environment, because the light emitting surface of the discharge vessel is efficiently used.

According to the fifth aspect of the present invention, with the configuration including the fluorescent lamp for efficiently purifying the environment and the like, deodorization and sterilization (sterilization) can be performed. In addition, since the durability of the printed mark of the fluorescent lamp is good, it functions as an illumination light source that is advantageous in terms of maintenance and the like.

[Brief description of the drawings]

FIGS. 1A and 1B show a main part configuration of an embodiment of a fluorescent lamp. FIG. 1A is a partially cutaway sectional view, and FIG. 1B is a partially enlarged sectional view.

FIG. 2 is a side view showing a configuration of a main part of an embodiment of a lighting fixture.

3 (a), 3 (b), and 3 (c) are perspective views showing a configuration of a main part of another embodiment of a fluorescent lamp.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Airtight container (arc tube) 2 ... Stem 3 ... Lead wire 4 ... Filament coil 5 ... Mark printing area 5 '... Printing mark 6 ... Photocatalytic film 7 ... Phosphor layer 8 ... Terminal Pin 9: Base 10: Fluorescent lamp 11: Lighting unit

Claims (5)

[Claims] 1. A translucent discharge vessel in which mercury and a rare gas are sealed, electrode means for generating a discharge in the discharge vessel, and a base having an external input terminal connected to the electrode means. A marking mark provided on the outer peripheral surface of the discharge vessel; and a photocatalytic film which catalyzes by receiving ultraviolet rays formed on the outer peripheral surface excluding a region where the marking mark is provided;
A fluorescent layer provided on an inner wall surface of the discharge vessel and emitting light when excited by ultraviolet rays generated by the discharge. 2. A light-transmitting discharge vessel having mercury and a rare gas sealed therein; electrode means for generating a discharge in the discharge vessel; and a base having an external input terminal connected to the electrode means. A photocatalytic film formed on the outer peripheral surface of the discharge vessel excluding a region near the base, and acting as a catalyst when receiving ultraviolet rays; and fluorescent light, which is provided on the inner wall surface of the discharge vessel and is excited by ultraviolet rays generated by discharge to emit light. And a body layer. 3. The fluorescent lamp according to claim 1, wherein the photocatalytic film is formed of TiO ₂ having anatase type as a main component. 4. The fluorescent lamp according to claim 1, wherein the marking mark is provided in a region of the discharge vessel close to the base. 5. A lighting apparatus comprising: an apparatus main body; and the fluorescent lamp according to claim 1, which is detachably attached to the apparatus main body.