JP2006079915A - Lighting fixture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting fixture efficiently improving air cleaning effect by generating a convection current inside and outside the lighting fixture when a photocatalytic effect is high, and restraining organic substance from adhering and remaining by a photocatalyst film by restraining convection current inside and outside the lighting fixture when the photocatalytic effect is low. <P>SOLUTION: The lighting fixture 1 is composed of: a fixture main body 10; fluorescent lamps 20 mounted on the fixture main body 10; a shade 30 covering at least one part of the fluorescent lamps 20; a photocatalyst film 40 formed on the shade 30; and a fan 50 equipped with a solar battery generating a power source by converting optical energy irradiated from the fluorescent lamps 20, and blades 52 rotated by the power source generated by the solar battery, and stirring air between the fixture main body 10 and the shade 30. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a lighting apparatus provided with a photocatalytic film.

  In recent years, lighting fixtures having a function of purifying indoor air such as houses have been proposed. As such a lighting fixture, for example, a fluorescent lamp or a shade formed with a photocatalytic film is known. Specifically, since the photocatalytic substance constituting the photocatalytic film has a property of decomposing when irradiated with ultraviolet rays or the like when an organic substance is attached, the organic substance floating in the room adheres to the photocatalytic substance. , And purify the air by decomposing.

By the way, in such a lighting fixture, the technique which aims at the improvement of an air cleaning effect by providing a vent in a shade in order to convect air is disclosed (for example, refer patent document 1 and patent document 2). A technique for forming a photocatalytic film on the blades of a ceiling fan is also disclosed (see Patent Document 3).
Japanese Patent No. 3036247 JP 2001-291422 A JP 2000-228108 A

  However, even when a vent is provided in the shade, air convection does not occur so much and the air cleaning effect may still be low. In addition, when a photocatalyst film is formed on the blade of the ceiling fan, when the blade of the ceiling fan is rotated in a state where the photocatalyst film is not irradiated with light, the amount of air that touches the photocatalyst film increases. However, since the photocatalytic effect is low, the organic matter cannot be completely decomposed, and the organic matter may remain on the blade. Furthermore, the photocatalyst film is not formed on the blades of the ceiling fan, but is a luminaire provided below the ceiling fan, and the photocatalyst film is formed at the location of the luminaire where air can contact by the convection effect of the ceiling fan. Even in this case, as described above, when only the ceiling fan is driven in a mode in which light is not irradiated, the air touching the photocatalyst film increases, but the photocatalytic effect is low, so the formation of the photocatalyst film The organic matter adhering to the location is not decomposed and may remain. Thus, when organic substance remains, there exists a possibility of giving the user the impression which is dirty, and it was not preferable.

  The present invention has been made to solve the above problems. That is, when the photocatalytic effect is high, air convection is generated inside and outside the lighting fixture, so that the air cleaning effect can be improved efficiently. When the photocatalytic effect is low, air convection is supplied inside and outside the lighting fixture. It aims at providing the lighting fixture which can suppress that organic substance adheres and remains in a photocatalyst film | membrane by making it not produce.

  The invention according to claim 1 includes: an instrument body; a light source attached to the instrument body; a cover body covering at least a part of the light source; and a photocatalytic film formed on at least one of the instrument body, the lamp, and the cover body And; energy conversion means for generating a power source by converting light energy emitted from the light source, and blades rotated by the power source generated by the energy conversion means, between the instrument body and the cover body And a fan for stirring the air.

  In the present invention, the lighting fixture may be in any form such as a direct ceiling type, a ceiling suspended type, and a stand type. The light source may have any shape of a straight tube shape, an annular shape, a quadrangular shape, and a polygonal shape, and may have a light emitting portion formed in a double ring shape with respect to a pair of electrodes.

  According to the invention described in claim 1, by providing the fan that can rotate the blade only when the blade is rotated by the light of the light source and the photocatalytic effect is effectively obtained, the instrument body and the cover body are provided. The air can be positively agitated and the air cleaning effect can be improved. In addition, since the blades do not rotate when light is not irradiated from the light source, the air between the instrument body and the cover body is not agitated, and when the photocatalytic effect is low, organic matter is positively attached to the photocatalytic film. Can be suppressed. Furthermore, since the fan blades are rotated by the light from the light source, no special power source is required, and power saving can be achieved.

  According to a second aspect of the present invention, the fan is provided on the cover body, and the photocatalytic film is formed on at least a part of the light source side surface of the cover body. is there. According to invention of Claim 2, even if it is the existing lighting fixture, the effect of invention of Claim 1 can be acquired only by replacing | exchanging a cover body.

  According to the first aspect of the present invention, air convection is generated inside and outside the lighting fixture when the photocatalytic effect is high, so that the air cleaning effect can be improved, and when the photocatalytic effect is low, the inside and outside of the lighting fixture can be improved. Therefore, the organic matter is prevented from actively adhering to the photocatalyst film. Furthermore, power saving can be achieved. According to invention of Claim 2, even if it is the existing lighting fixture, the effect of invention of Claim 1 can be acquired only by replacing | exchanging a cover body.

  Embodiments of the present invention will be described below. FIG. 1 is a schematic vertical sectional view of a lighting fixture according to the present embodiment, FIG. 2 is a schematic plan view of a shade viewed from the fixture main body side according to the present embodiment, and FIG. It is a typical top view of the solar fan and attachment member seen from the instrument main body side concerning an embodiment.

  As shown in FIGS. 1 to 3, the lighting apparatus 1 includes an apparatus body 10, a fluorescent lamp 20 (lamp) that is detachably attached to the apparatus body 10, and a shade 30 that covers at least a part of the fluorescent lamp 20. (Cover body), a photocatalyst film 40 formed on the shade 30, and a solar fan 50 that stirs the air between the instrument body 10 and the shade 30.

  The instrument body 10 includes a chassis 11. A reflection plate 12 that reflects the light of the fluorescent lamp 20 is attached to the lower surface of the chassis 11. An opening is formed in the central part of the chassis 11 and the reflection plate 12, and a hooking ceiling 13 attached to the ceiling C is disposed in this opening. An adapter 14 is attached to the lower portion of the hooking ceiling 13, and a claw portion 14 a provided on the side surface side of the adapter 14 is locked to the lower surface of the reflecting plate 12. The lighting fixture 1 is attached to the ceiling C by the nail | claw part 14a being latched by the lower surface of the reflecting plate 12. FIG.

  A lighting circuit 15 for lighting the fluorescent lamp 20 is accommodated in a space formed by the chassis 11 and the reflecting plate 12. The lighting circuit 15 is electrically connected to the adapter 14. On the lower surface of the reflection plate 12, a connector 16 to which a cap pin (not shown) of the fluorescent lamp 20 is attached and a lamp holder 17 that holds the fluorescent lamp 20 are attached. The connector 16 is electrically connected to the lighting circuit 15. A baby ball 18 as a night light is attached to the lower surface of the reflector 12.

  The fluorescent lamp 20 has an annular shape and is arranged in two concentric circles. Here, one filament electrode in the fluorescent lamp 20 is set to have a larger distance from the base than the other filament electrode (so-called filament high-mount structure). By using the fluorescent lamp 20 having such a structure, the coldest part is formed between the filament electrode and the base.

  The shade 30 is disposed below the fluorescent lamp 20. The seed 30 is formed in a circular and dish shape using a material such as acrylic and polycarbonate, and is formed so that a portion excluding the outer peripheral portion 31 is milky white. That is, the outer peripheral portion 31 of the shade 30 is transparent, and the portion inside the outer peripheral portion 31 is milky white. In the present embodiment, the outer peripheral portion 31 is transparent, but the outer peripheral portion 31 may not be transparent. Thus, since various designs can be adopted, the degree of freedom in design can be increased even for the shade 30 to which the photocatalytic film 40 is applied. Moreover, in this Embodiment, although the circular shade 30 is used, shapes, such as a square shape, may be sufficient.

  The shade 30 is generally called an open type. That is, the shade 30 is configured to conceal the instrument main body 10 by the shade 30 when the instrument main body 10 is viewed from directly below in a state of being attached to the ceiling C, and between the instrument main body 10 and the shade 30. The space is opened over the circumferential direction. The shade 30 may be generally called a sealed type. That is, the close-contact type shade is configured to hide the instrument main body 10 with the shade when the instrument main body 10 is viewed from directly under the ceiling C, and the outer periphery of the instrument main body 10 and the shade. The part is configured to be in close contact over the circumferential direction.

  A vent hole 32 is formed at the center of the shade 30 for allowing the air below the shade 30 to flow into the space between the instrument body 10 and the shade 30. The vent hole 32 is formed in a circular shape, and the diameter of the vent hole 32 is larger than the diameters of components 72 and 73 described later. The vent hole 32 does not have to be circular.

  The shade 30 is attached to the instrument body 10 by a mounting bracket 60. The mounting bracket 60 is composed of a decorative bar 61 having male screws formed at both ends, a nut 62, and a decorative device 63 having female screws formed therein. One end of the decorative bar 61 is inserted into a hole provided in the outer peripheral portion of the chassis 11, and a nut 62 is screwed into the end of the decorative bar 61 from the back side of the chassis 11, whereby the decorative bar is attached to the chassis 11. 61 is attached. Further, the other end of the decorative bar 61 is inserted into a hole provided in the outer peripheral portion 31 of the shade 30, and the ornament 63 is screwed into the end of the decorative bar 61 from the outer surface side of the shade 30. The shade 30 is attached to the rod 61, and the shade 30 is attached to the instrument body 10.

  The photocatalyst film 40 has a milky white film thickness of several tens of nm to several hundreds of μm, and is formed on the surface of the shade 30 on the fluorescent lamp 20 side, that is, the inner surface of the shade 30. Specifically, the photocatalyst film 40 is not formed on the outer peripheral portion 31 of the shade 30, and the photocatalyst film 40 is formed on a portion inside the outer peripheral portion 31. In the present embodiment, the photocatalytic film 40 is formed only on the inner surface of the shade 30, but it may be formed on at least one of the instrument main body 10, the fluorescent lamp 20, and the shade 30. Further, the photocatalytic film 40 does not necessarily have to be formed on the whole of these films, and may be formed on a part thereof.

The photocatalyst film 40 is mainly composed of a visible light reaction type photocatalyst substance. The visible light reaction type photocatalytic substance is activated mainly by both light having a wavelength of 300 nm to 400 nm and light having a wavelength of more than 400 nm and 450 nm or less. The visible light reaction type photocatalytic substance is composed of a metal oxide having a photocatalytic action. Examples of such metal oxides include TiO ₂ , WO ₃ , CdO ₃ , In ₂ O ₃ , Ag ₂ O, MnO ₂ , Cu ₂ O ₃ , Fe ₂ O ₃ , V ₂ O ₅ , ZrO ₂ , RuO _2. , Cr ₂ O ₃ , CoO ₃ , NiO, SnO ₂ , CeO ₂ , Nb ₂ O ₃ , KTaO ₃ , SrTiO ₃ , K ₄ NbO _{17 and the} like can be used in combination. Among these, TiO ₂ , SrTiO _3, and K ₄ NbO ₁₇ are preferable from the viewpoints of electron-hole density, superoxide anion, hydroxyl radical density, corrosion resistance as a material, safety, and the like. . However, TiO ₂ is optimal because it has the best photocatalytic activity, is available on an industrial scale, is chemically stable, and can be obtained at low cost. In the present embodiment, the photocatalyst film 40 is mainly composed of a visible light reaction type photocatalyst material, but it only needs to contain a visible light reaction type photocatalyst material. Further, the photocatalytic film 40 may be made of an ultraviolet reaction type photocatalyst material instead of or together with the visible light reaction type photocatalyst material. Here, the ultraviolet-reactive photocatalytic substance is mainly activated by light having a wavelength of 300 nm to 400 nm.

  The solar fan 50 is disposed in the vicinity of the vent hole 32. The solar fan 50 includes a mounting portion 51 and blades 52. The blades 52 are composed of solar cells that generate a power source by converting light energy emitted from the fluorescent lamp 20. By receiving the light of the fluorescent lamp 20 by the solar cell, a power source is generated, and the blades 52 are rotated with respect to the attachment portion 51 by the power source. In addition, in this Embodiment, the solar cell itself is the blade | wing 52, However, You may provide a solar cell and the blade | wing 52 separately.

  The solar fan 50 is attached to the central part of the instrument main body 10 by an attachment member 70. The attachment member 70 is composed of parts 71 to 73 and the like. A screw hole is formed at the root of the component 71, and the component 71 is attached to the reflecting plate 12 with a screw (not shown). The part 72 is attached to the tip of the part 71. The solar fan 50 is attached to the instrument main body 10 by attaching the attachment portion 51 of the solar fan 50 to the surface of the component 72 at the instrument main body 10 side. The component 73 is located below the component and is made of a material that does not transmit light. The parts 72 and 73 protrude from the vent hole 42 of the shade 40.

  Such a lighting fixture 1 can be controlled to be turned on by the remote controller 80. The remote controller 80 includes a key 81 for turning on, turning off, and turning off the luminaire 1. By pressing the key 81, for example, all lights are turned on, all lights are turned on, and night lights are turned on. It is possible to switch off. The remote controller 80 may be provided with a liquid crystal display or the like for visually displaying setting information input through the key 81.

  Hereinafter, the lighting state of the lighting fixture 1 will be described. FIG. 4 is a diagram schematically showing a lighting state of the lighting fixture according to the present embodiment. When the fluorescent lamp 20 is turned on as shown in FIG. 4, the blades 52 of the solar fan 50 are rotated by the light from the fluorescent lamp 20. Thereby, the air below the shade 30 flows into the space between the instrument main body 10 and the shade 30 through the vent hole 32 and is agitated. The organic matter contained in the air is adsorbed and decomposed by the photocatalytic substance activated by the light of the fluorescent lamp 20.

  In the present embodiment, the appliance main body 10 is provided with the solar fan 50 that can rotate the blade 52 only when the blade 52 is rotated by the light of the fluorescent lamp 20 and the photocatalytic effect is effectively obtained. And the shade 30 can be agitated positively, and the air cleaning effect can be improved. Further, since the blade 52 does not rotate in a state where light is not irradiated from the fluorescent lamp, the air between the instrument body 10 and the shade 30 is not agitated, and when the photocatalytic effect is low, organic matter is not present in the photocatalytic film 40. Positive adhesion can be suppressed. Furthermore, since the blades 52 are rotated by the light from the fluorescent lamp 20, no special power source is required and power saving can be achieved.

  In the present embodiment, the ventilation hole 32 is formed in the center of the shade 30 and the solar fan 50 is disposed in the vicinity of the ventilation hole 32, so that air efficiently flows between the instrument body 10 and the shade 30. Can be made. That is, since the temperature in the vicinity of the center portion of the shade 30 is lower than that in other portions, if the vent hole 32 is formed in the central portion of the shade 30, the air below the shade 30 rises due to thermal convection, and the vent hole It flows between the instrument body 10 and the shade 30 via 32. On the other hand, when the solar fan 50 is disposed in the vicinity of the vent hole 32, the air below the shade 30 rises due to the suction of air due to the rotation of the blades 52, and between the instrument body 10 and the shade 30 via the vent hole 32. Inflow. These all produce a rising air flow. Thereby, air can be efficiently flowed in between the instrument main body 10 and the shade 30.

  In this embodiment, since the solar fan 50 is used, the rotational speed of the blades 52 can be changed without providing a switch or the like. That is, since the amount of light of the fluorescent lamp 20 is large in the all-light lighting state, the photocatalytic effect is high. For this reason, even if the rotational speed of the blades 52 is increased, the organic matter can be decomposed. On the other hand, since the light quantity of the fluorescent lamp 20 is small in the dimming lighting state, the photocatalytic effect is low compared to the all-light lighting state. For this reason, it is desirable to make the rotation speed of the blades 20 smaller than that in the all-light lighting state. Here, in order to change the rotation speed of the blade 52, a switch or the like is usually required. However, if a switch or the like is provided, the structure becomes complicated and the cost increases. On the other hand, since the solar fan 50 is used in the present embodiment, the rotational speed of the blades 52 automatically changes according to the amount of light of the fluorescent lamp 20. As a result, the rotational speed of the blade 52 can be changed without providing a switch or the like.

  In this embodiment, since the solar fan 50 is attached to the fixture body 10, the lighting fixture 1 can be easily manufactured. In the present embodiment, the solar fan 50 is attached to the instrument body 10, but may be attached to the shade 30. In this case, the effect similar to that of the present embodiment can be obtained by simply replacing the shade of the existing lighting fixture with the shade 30 to which the solar fan 50 is attached.

  In the present embodiment, since the solar fan 50 can be rotated to allow air to flow between the instrument body 10 and the shade 30, an increase in the coldest part temperature of the fluorescent lamp 20 can be suppressed, Luminous efficiency can be increased.

  In the present embodiment, since the photocatalytic film 40 is mainly composed of a visible light reaction type photocatalytic substance, a more photocatalytic effect can be obtained. That is, FIG. 5 is a graph showing the wavelength dependence of the photocatalytic effect in the visible light reactive photocatalytic substance and the ultraviolet reactive photocatalytic substance. As can be seen from FIG. 5, when the ultraviolet reactive photocatalytic substance is used, When the wavelength exceeds 350 nm, the photocatalytic effect is drastically reduced, and almost no photocatalytic effect is obtained within the wavelength range of 400 nm to 450 nm. On the other hand, when a visible light reaction type photocatalytic substance is used, a sufficient photocatalytic effect can be obtained not only within the wavelength range of 300 nm to 400 nm but also within the wavelength range of 400 nm to 450 nm. Thereby, a more photocatalytic effect can be obtained. Note that in a fluorescent lamp using a general three-wavelength phosphor, light within a wavelength range of 400 nm to 450 nm is emitted, but light within a wavelength range of 300 nm to 400 nm is not so much emitted. Accordingly, when the photocatalytic substance is excited by the light of the fluorescent lamp, it is preferable that the photocatalytic film is made of a visible light type photocatalytic substance rather than an ultraviolet reaction type photocatalytic substance.

  The present invention is not limited to the description of the above embodiment, and the structure, material, arrangement of each member, and the like can be appropriately changed without departing from the gist of the present invention.

It is a typical vertical sectional view of the lighting fixture which concerns on embodiment. It is a typical top view of the shade seen from the instrument main part side concerning an embodiment. It is a typical top view of the solar fan and attachment member seen from the instrument main body side concerning an embodiment. It is the figure which showed typically the lighting state of the lighting fixture which concerns on embodiment. It is the graph which showed the wavelength dependence of the photocatalytic effect in a visible light reaction type photocatalyst substance and an ultraviolet reaction type photocatalyst substance.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Lighting fixture, 10 ... Main body of an instrument, 20 ... Fluorescent lamp, 30 ... Sade, 40 ... Photocatalyst film | membrane, 50 ... Solar fan, 52 ... Blade | wing.

Claims (2)

An instrument body;
A light source attached to the instrument body;
A cover that covers at least a portion of the light source;
A photocatalytic film formed on at least one of the instrument body, the lamp, and the cover body;
The air between the device body and the cover body has energy conversion means for generating a power source by converting light energy irradiated from the light source, and blades rotated by the power source generated by the energy conversion means. With a fan for stirring;
The lighting fixture characterized by comprising.   The lighting apparatus according to claim 1, wherein the fan is provided on the cover body, and the photocatalytic film is formed on at least a part of the light source side surface of the cover body.

Images