JP2010170743A - Luminaire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve oil stain properties with respect to oil dirt of a reflector and adhesive dirt of dust, regardless of the kinds of the light source, in a luminaire equipped with the reflector to reflect light from a light source portion. <P>SOLUTION: This luminaire 1 includes a fluorescent lamp 4, the reflector 3 to reflect light from the fluorescent lamp 4, and a casing 2, which supports the fluorescent lamp 4 and the reflector 3 and houses the lighting circuit 5 of the fluorescent lamp 4. A water-repellent and oil-repellent layer having an oleic acid contact angle which is higher than that of a reflecting layer formed on the backing of a surface of the reflector 3 is formed on the outermost surface of the reflector 31, and the reflector has an air flow adjusting hole 33 to circulate air on its top face 30, at a position higher than the lowest point of the fluorescent lamp 4. As a result, it can be made difficult for oil dirt to stick to the surface of the reflector 3, and air flow A containing dust floating around the fluorescent lamp 4 can be exhausted from the air flow-adjusting hole 33. Accordingly, regardless of the kind of light source, oil stain properties with respect to oil dirt of the reflector 3 and adhesive dirt of dust can be improved. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a luminaire having a reflector with high antifouling property against oil stains and dust adhesion.

  Conventionally, in lighting fixtures, as an attempt to save energy, replacing incandescent lamps with high-efficiency lamps such as bulb-type fluorescent lamps and LEDs reduces the amount of power used and increases the reflectivity of the reflector. Power saving has been achieved by increasing power efficiency, reducing lamp wattage, and reducing the number of fixtures.

  However, in an environment where oil stains are likely to adhere in factories and homes, the reflectors of the lighting fixtures are subject to oil stains with the passage of time, and dust adheres through the oil stains, so that the reflectance of the lighting fixtures increases. There was a problem that the design illuminance that was initially expected could not be obtained because of a short period of time compared to the initial installation.

  On the other hand, as a lighting fixture that prevents the reflector from becoming dirty, the photocatalyst film formed on the reflector is exposed to ultraviolet rays from the light source to oxidize organic substances such as tobacco fat on the reflector. There are known ones that improve antifouling properties by disassembling and cleaning (for example, see Patent Document 1). However, this luminaire requires a special fluorescent lamp that strongly generates ultraviolet rays as a light source, and is not suitable when a fluorescent lamp or an incandescent lamp with a small amount of ultraviolet rays is used as a light source. Limited.

  Further, a lighting fixture is known in which the outer surface of a cover glass of a tail lamp cover is covered with a protective film having water repellency (see, for example, Patent Document 2). However, since this protective film is not oil-repellent, this lighting apparatus is not suitable in an environment where oil stains are likely to adhere.

JP 2000-67620 A JP-A-6-64311

  The present invention solves the above-described problem, and in a luminaire including a reflector that reflects light from the light source unit, regardless of the type of the light source, the reflector prevents oil stains and dirt adhering to the dust. It aims at providing the lighting fixture which can improve soiling.

  In order to achieve the above object, the invention of claim 1 is directed to a light source unit, a reflector that reflects light from the light source unit, the light source unit and the reflector, and a lighting circuit for the light source unit. In a lighting fixture comprising a housing, a water- and oil-repellent layer having a higher oleic acid contact angle than a reflecting layer formed on a base of the reflecting plate surface is formed on the outermost surface of the reflecting plate. The airflow adjusting hole for circulating air is provided at a position higher than the lowest point of the light source part.

  According to a second aspect of the present invention, in the lighting apparatus according to the first aspect, a vibrator for applying vibration to the reflecting plate is provided on the back side of the reflecting plate.

  According to a third aspect of the present invention, in the lighting apparatus according to the first or second aspect, an oil receiver for receiving oil flowing along the reflecting plate is provided at a lowermost end of the reflecting plate.

  According to a fourth aspect of the present invention, in the lighting fixture according to any one of the first to third aspects, the water / oil repellent layer is formed on the periphery of the airflow adjustment hole on the back surface side of the reflector. is there.

  According to the first aspect of the invention, the water / oil repellent layer having a higher oleic acid contact angle than the reflective layer makes it difficult for oil mist to adhere to the outermost surface of the reflector. In addition, air that has been warmed by the light source unit flows from the bottom of the light source unit to the air flow adjustment hole, so that dust floating around the light source unit is carried on the air flow and discharged to the back side of the reflector, and the dust is on the outermost surface of the reflector. It becomes difficult to adhere to. Thereby, the antifouling performance against oil stains and dust stains on the reflector can be enhanced regardless of the type of light source.

  According to the second aspect of the present invention, since the reflector is vibrated by the vibration of the vibrator, the dust attached to the reflector is shaken off by the impact of the vibration, and is difficult to collect in the vicinity of the airflow adjustment hole. Clogging is difficult to occur, and dust is always discharged. Thereby, even if it uses for a long period of time, the antifouling performance of a reflecting plate can be maintained.

  According to the invention of claim 3, since the oil droplets that flow down through the reflecting plate by the oil repellent function of the reflecting plate surface are collected in the oil receiver, the oil does not fall into a product or a passage under the lighting fixture. Can be used for

  According to the fourth aspect of the present invention, the oil mist and dust discharged from the air flow adjusting hole to the outer surface are suppressed from adhering to the back surface of the reflecting plate, so that the antifouling property on the back side of the reflecting plate can be improved.

The perspective view of the lighting fixture which concerns on the 1st Embodiment of this invention. The exploded perspective view of the lighting fixture. The partial top view of the lighting fixture. FIG. 4 is a cross-sectional view taken along the line II in FIG. 3. The half-cut sectional view of the lighting fixture which concerns on the modification of the said embodiment. (A) is a half sectional view of a lighting fixture according to another modification of the embodiment, (b) is a perspective view seen from below the reflector of the lighting fixture. The half-cut sectional view of the lighting fixture which concerns on the 2nd Embodiment of this invention. Sectional drawing of the lighting fixture which concerns on the 3rd Embodiment of this invention. The disassembled perspective view of the lighting fixture which concerns on the 4th Embodiment of this invention.

  Hereinafter, a lighting apparatus according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 4. As shown in FIGS. 1 to 3, the luminaire 1 includes a housing 2, a reflector 3 that reflects light from the fluorescent lamp 4, and a straight tube fluorescent lamp 4 as a light source unit. The housing 2 supports the reflector 3 and the fluorescent lamp 4 and houses the lighting circuit 5 of the fluorescent lamp 4. The casing 2 is directly attached to the ceiling surface 100 or the like with screws 11, and the power supply wiring cord 12 supplies power to the lighting circuit 5. Supplied. Here, two fluorescent lamps 4 are shown, but the number is not limited.

  The housing 2 includes a main body portion 21 that forms a substantially rectangular hollow housing, rectangular socket support portions 22 that are provided so as to cross in a T shape at both ends in the longitudinal direction of the main body portion 21, and the socket support portions 22. It has a fluorescent lamp socket 23 provided on the lower side from both ends in the longitudinal direction, and a screw hole portion 24 for screwing the reflection plate 3. The main body 21 is configured to be symmetrical with respect to the center line in the longitudinal direction and the short direction. The pair of sockets 23 are arranged symmetrically with respect to the center position in the longitudinal direction of the main body 21 and so that the insertion portions of the sockets face each other.

  The reflector 3 has a rectangular top surface 31 and an inclined surface 32 that inclines downward from the edge of the top surface 31. The inclined surface 32 has a trapezoidal shape in which a cross section perpendicular to the longitudinal direction extends downward. The top surface 31 is formed with a plurality of airflow adjustment holes 33 for circulating air. The reflector 3 is attached to the housing 2 by being secured to the housing 2 by screws 13 so as to cover the housing 2 from below, leaving the socket 23, and is arranged so as to cover the fluorescent lamp 4 from above. It is installed.

  Further, the reflecting plate 3 is formed with a reflecting layer on the surface of the reflecting plate surface facing the fluorescent lamp 4 by white coating or aluminum vapor deposition, and the outermost surface is in contact with oleic acid than the underlying reflecting layer. A water / oil repellent layer having high corners is formed. As a result of investigating the correlation between antifouling properties against various oils such as cutting oil and edible oil generated as factory oil mist and the oleic acid contact angle, the higher the oleic acid contact angle, the better the antifouling property against oil stains. Found it expensive.

  The water / oil repellent layer is not particularly limited as long as it can ensure adhesion to the reflective layer and does not significantly impair the reflectivity of the reflective layer. For example, silicone-based coating, fluorine-based coating, etc. Silicone acrylic coating, silicone fluorine coating and the like can be used.

  As shown in FIG. 4, the lighting fixture 1 is symmetric with respect to the center line 10 in the short direction of the main body 21, and the airflow adjustment hole 33 is positioned higher than the lowest point 30 of the cylindrical light emitting surface of the fluorescent lamp 4. A water / oil repellent layer similar to the above is formed on the peripheral edge 34 of the airflow adjustment hole 33 on the back surface side of the reflector 3. As long as the airflow adjusting hole 33 does not impair the reflecting function of the reflecting plate 3, there is no limitation on the size, shape, number, and the like. Note that by arbitrarily adjusting the size and position of the airflow adjustment hole 33, the upward light flux can be controlled, and an effect such as an increase in brightness due to indirect light can be expected.

  In the reflecting plate 3 having the airflow adjusting hole 33, the air around the fluorescent lamp 4 is heated by the heat of light emitted when the fluorescent lamp 4 is turned on, and rises through the airflow adjusting hole 33 from below the fluorescent lamp 4. The airflow A is generated, and the airflow adjustment hole 33 serves as a discharge port for discharging the airflow A to the outer surface side of the reflector 3 at this time. At this time, dust floating on the inner surface of the reflecting plate 3 rides on the airflow A and is discharged to the outer surface side of the reflecting plate 3.

  Thus, according to the lighting fixture 1 of this embodiment, the oil mist adheres to the outermost surface of the reflecting plate 3 by forming the water and oil repellent layer having a higher oleic acid contact angle than the reflecting layer on the reflecting plate 3. It becomes difficult. Further, the air warmed by the fluorescent lamp 4 becomes the rising airflow A flowing from the lower side of the fluorescent lamp 4 to the airflow adjusting hole 33, so that dust floating around the fluorescent lamp 4 rides on the airflow A and the back surface of the reflector 3. The dust is discharged to the side, and it becomes difficult for dust to adhere to the outermost surface of the reflector 3. Thereby, irrespective of the kind of light source, the antifouling performance against oil stains and dust stains of the reflector 3 can be enhanced. Therefore, a reduction in reflection efficiency due to aging can be reduced, and power can be saved. Moreover, the necessity for cleaning the reflecting plate 3 is reduced, and the maintainability is improved.

  Further, by forming the water / oil repellent layer on the peripheral edge 34 of the airflow adjustment hole 33 on the back surface side of the reflection plate 3, oil mist and dust discharged from the airflow adjustment hole 33 to the outer surface adhere to the back surface of the reflection plate 3. This can be suppressed and the antifouling property on the back side of the reflector can be enhanced.

  Next, the lighting fixture 1 by the modification of the said embodiment is demonstrated with reference to FIG. In this modification, the airflow adjustment hole 33 is formed not on the top surface 31 side of the reflector 3 but on the inclined surface 32 side. In FIG. 5, the luminaire 1 shows only the left half section with respect to the center line 10 in the short direction of the main body 21.

  The inclined surface 32 is bent in two steps from the top surface 31 side, and the airflow adjustment hole 33 is formed on the upper side of the inclined surface 32 that is positioned higher than the lowest point 30 of the fluorescent lamp 4. As a result, a large amount of oil droplets and dust discharged from the airflow adjustment hole 33 can be attached to the inclined surface 32 on the back side of the reflector 3, so that the airflow adjustment hole 33 is provided on the top surface 31. Many oil droplets easily slide down along the inclined surface 32.

  Next, the lighting fixture 1 by the other modification of the said embodiment is demonstrated with reference to Fig.6 (a), (b). In this modification, airflow adjustment holes 33 are provided on both the top surface 31 and the inclined surface 32 of the reflector 3. Thereby, since the airflow A warmed by the fluorescent lamp 4 is discharged from the top surface 31 side and the inclined surface 32 side, dust around the fluorescent lamp 4 is more easily discharged.

  Next, the lighting fixture which concerns on the 2nd Embodiment of this invention is demonstrated with reference to FIG. The present embodiment is different from the first embodiment in that a vibrator 6 for applying vibration to the reflecting plate 3 is provided on the back side of the reflecting plate 3.

  The vibrator 6 is composed of an electromagnetic motor or the like, and is provided in the vicinity of the airflow adjustment hole 33 on the top surface 31 of the reflection plate 3. The vibrator 6 is fixed to the top surface 31 by the fixing portion 7, is supplied with power from a power supply circuit (not shown) built in the main body portion 2, and vibrates in the vertical direction indicated by an arrow B. The vibration of the vibrator 6 can be generated, for example, due to an imbalance in the center of gravity of the weight when the motor is rotated by attaching a weight to the shaft tip of the electromagnetic motor. It can also be generated by a linear vibration motor driven by a pulse signal from a microcomputer.

  According to the present embodiment, since the reflector 3 is vibrated by the vibrator 6, the dust attached to the reflector 3 is shaken off by this impact, and is difficult to collect in the vicinity of the airflow adjustment hole 33. Clogging is less likely to occur. Accordingly, dust is always discharged, and the antifouling performance of the reflector 3 can be maintained even when used for a long time. Note that a plurality of vibrators 6 can be disposed on the reflector 3.

  Next, the lighting fixture which concerns on the 3rd Embodiment of this invention is demonstrated with reference to FIG. In the present embodiment, an oil receiver 35 that receives oil flowing through the reflector 3 is provided at the lowermost end of the reflector 3.

  The oil receiver 35 is formed in a bowl shape in which the lowermost end of the reflector 3 is bent inward in a U shape. Further, the reflecting plate 3 is provided with an auxiliary reflecting plate 36 for reflecting light leaking from the airflow adjusting hole 33 from the outside of the top surface 31. The auxiliary reflecting plate 36 is formed by bending a reflecting flat plate into an L shape from its periphery so as to cover the air flow adjusting hole 33 without blocking the discharge of the air flow.

  According to this embodiment, the oil droplets adhering to the reflecting plate 3 flow down the reflecting plate 3 by the oil repellent function of the surface of the reflecting plate 3 and accumulate in the oil receiver 35. It can be suitably used without falling. Further, by making the oil receiver 35 detachable from the reflecting plate 3, accumulated oil droplets can be easily disposed, and the oil receiver 35 can be easily maintained. It is also preferable to form the water / oil repellent layer on the inner surface of the oil receiver 35 on the outermost surface. Further, by providing the auxiliary reflector 36, it is possible to reduce the light leaking from the airflow adjusting hole 33 and increase the irradiation light.

  Next, the lighting fixture which concerns on the 4th Embodiment of this invention is demonstrated with reference to FIG. The luminaire 1a of this embodiment includes a reflector 3a having a bell-shaped reflecting surface 37, an illuminating lamp 4a having an incandescent lamp or the same screw-type base as the incandescent lamp as a light source, and a cylindrical casing 2. The airflow adjustment hole 33 is provided on the reflection surface 37 of the reflection plate 3a at a position higher than the lowest point 30 of the illuminating lamp 4a.

  The housing 2 includes a cylindrical main body portion 21a, a socket 23a corresponding to a screw-type base provided in the main body portion 21a, and a reflector mounting portion 25 that is joined to the main body portion 21a with an adhesive or the like. The main body 21a is attached to an auto-lifter (electric lift device) 50 fixed to the ceiling surface, and can be moved up and down. The reflection plate 3 a has an opening 38 through which the illuminating lamp 4 a passes, and is fixed to the reflection plate mounting portion 25 by being screwed with a screw 13 and a screw hole portion 24. The illuminating lamp 4a is attached to the socket 23a through the opening 38 of the reflecting plate 3a. Further, a water repellent layer similar to the above is formed on the inner surface of the reflecting plate 3a and the peripheral edge 34 of the airflow adjusting hole 33 outside thereof.

  According to the present embodiment, even when the illuminating lamp 4a is an incandescent lamp, the reflecting plate 3a is bell-shaped, the water repellent layer is formed on the reflecting plate 3a, and on the periphery of the circle near the opening 38. By forming the airflow adjustment hole 33, oil stains on the surface of the reflector 3a can be reduced, and dust floating around the entire circumference of the illumination lamp 4a can be efficiently discharged from the airflow adjustment hole 33, improving the antifouling performance. it can. Similarly to the above, a vibrator can be provided on the outer surface of the reflecting plate 3a, and an oil receiver can be provided at the lowermost end of the reflecting plate 3a.

  In addition, this invention is not limited to the structure of the said embodiment, A various deformation | transformation is possible suitably in the range which does not change the meaning of invention. For example, although the trapezoidal shape and the bell-shaped shape are shown as the shape of the reflecting plate in the above embodiment, other shapes such as a polygonal shape may be used.

DESCRIPTION OF SYMBOLS 1, 1a Lighting fixture 2 Housing 3, 3a Reflector 4 Fluorescent lamp (light source part)
4a Illumination lamp (light source)
5 lighting circuit 6 vibrator 30 lowest point 33 air flow adjustment hole 34 peripheral edge 35 oil receiver

Claims (4)

In a luminaire comprising a light source part, a reflecting plate that reflects light from the light source part, and a housing that supports the light source part and the reflecting plate and accommodates a lighting circuit of the light source part,
On the outermost surface of the reflector, a water / oil repellent layer having a higher oleic acid contact angle than the reflective layer formed on the base of the reflector is formed,
The said reflecting plate has the airflow adjustment hole for distribute | circulating air in the position higher than the lowest point of the said light source part, The lighting fixture characterized by the above-mentioned.   The lighting fixture according to claim 1, wherein a vibrator for applying vibration to the reflecting plate is provided on a back surface side of the reflecting plate.   The lighting fixture according to claim 1 or 2, wherein an oil receiver that catches oil flowing through the reflecting plate is provided at a lowermost end of the reflecting plate.   The lighting apparatus according to any one of claims 1 to 3, wherein the water / oil repellent layer is formed on a peripheral edge of the airflow adjustment hole on a back surface side of the reflector.

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