JP2012226959A - Lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting fixture that can improve reliability of an air-cooling fan.SOLUTION: The lighting fixture includes: a light source part 1; a fixture body 2 for holding the light source part 1; a heat radiation part 3 which radiates heat generated in the light source part 1; and an air-cooling fan 8 which cools at least the heat radiation part 3. The heat radiation part 3 and the air-cooling fan 8 are exposed, and the lighting fixture has an air-flow control part 9 which restricts the range where the air stream which is blown from the air-cooling fan 8 and cools at least the heat radiation part 3 flows out.

Description

  The present invention relates to a lighting apparatus including an air cooling fan.

  In recent years, along with higher efficiency and lower cost of LED elements, lighting fixtures using LED elements as light sources (LED lighting fixtures) are becoming popular.

  In addition, the LED element achieves a luminous efficiency equivalent to or higher than the luminous efficiency of a fluorescent lamp, but generates heat during light emission, so improving the heat dissipation of the lighting fixture is an important issue. ing. In particular, in a high-output lighting fixture using an LED element as a light source, when heat is radiated by natural air cooling, a large heat radiating portion is required, and an increase in the size of the lighting fixture becomes a problem.

  Conventionally, a ceiling-embedded lighting apparatus including an air-cooled fan has been proposed (for example, Patent Document 1).

  As shown in FIG. 11, the lighting fixture disclosed in Patent Document 1 is embedded in a ceiling board 69 and the like, and is connected to an LED mounting substrate 61 on which a plurality of LEDs 60 are mounted, and DC power to the plurality of LEDs 60. And a drive substrate 63 having a drive circuit 62 for supplying the same. The drive board 63 is disposed above the LED mounting board 61. In addition, an opening 61 a is formed in the center of the LED mounting substrate 61. An opening 63 a is formed at the center of the drive substrate 63.

  The lighting fixture disclosed in Patent Document 1 dissipates heat generated by each LED 60 through the LED mounting substrate 61 and heat generated by the drive circuit 62 via the drive substrate 63. And a heat dissipating part 65. Furthermore, the lighting fixture disclosed in Patent Literature 1 includes a fan (axial fan) 66 that takes air from the outside to the inside of the lighting fixture and discharges air from the inside of the lighting fixture to the outside, an LED mounting board 61, A drive board 63, heat dissipation parts 64 and 65, and a casing 67 that surrounds the axial fan 66 are provided. In this lighting fixture, the axial fan 66 constitutes a fan that sends an air flow to the heat radiating portions 64 and 65.

  The heat radiating portion 64 is disposed along the outer edge on the upper surface side of the LED mounting substrate 61 and holds the drive substrate 63. An upper plate 68 having an axial fan 66 is attached to the upper end of the heat radiating portion 64. The axial fan 66 is attached to the lower surface side of the upper plate 68. In addition, an opening 68 a is formed in the center of the upper plate 68.

  The heat radiating portion 65 is attached to the lower center surface of the drive substrate 63 so as to communicate with the opening 63 a of the drive substrate 63.

  The casing 67 includes a bowl-shaped outer body 67a and a disk-shaped diffusion portion 67b that diffuses light emitted from each LED 60.

  In the diffusing portion 67b, a plurality of intake holes 67ba are formed in the vicinity of the connection portion between the outer body 67a and the diffusing portion 67b to take in air from the outside to the inside of the lighting fixture. A discharge hole 67bb for discharging air from the inside of the lighting fixture to the outside is formed at the center of the diffusion portion 67b.

  Here, the lighting fixture disclosed in Patent Document 1 causes air to enter the inside of the housing 67 from the intake hole 67ba of the diffusion portion 67b as indicated by the arrow shown in FIG. Since the air is taken in and passes through the heat radiating portions 64 and 65, the heat from the heat radiating portions 64 and 65 is taken away and radiated from the discharge hole 67 bb of the diffusing portion 67 b to the outside of the housing 67. Can be improved.

  Conventionally, a lighting device including an air-cooled fan has been proposed (for example, Patent Document 2).

  As shown in FIG. 12, the illumination device disclosed in Patent Document 2 includes an illumination device main body 70, a cooling unit 71 incorporated in the illumination device main body 70, and an LED to which a plurality of LED elements 72 are attached. And a substrate 73. The LED substrate 73 is attached to one surface of the LED substrate attachment portion 70a in the lighting device body 70.

  The cooling unit 71 includes a hollow prismatic hollow member 74 that absorbs heat generated by the LED element 72, a fan 75 disposed inside the hollow member 74, and air (atmosphere) passing through the hollow member 74. A first filter 76a and a second filter 76b for removing the contained dust are provided.

  The hollow member 74 is open at both ends and has a first opening 74a and a second opening 74b. Further, the hollow member 74 is attached to the other surface of the LED board attachment portion 70a. The first opening 74 a and the second opening 74 b communicate with the outside of the lighting device main body 70.

  The first filter 76a is attached to the first opening 74a. The second filter 76b is attached to the second opening 74b.

  The fan 75 is disposed in the vicinity of the second opening 74b in the hollow member 74 in order to exhaust air from the second opening 74b.

  Here, in the lighting device disclosed in Patent Document 2, when the fan 75 rotates in a predetermined direction, the inside of the hollow member 74 is formed from the first opening 74a as shown by an arrow in FIG. The air is sucked into the hollow member 74, and the air sucked into the hollow member 74 is discharged to the outside through the second opening 74b. Therefore, the lighting device disclosed in Patent Document 2 can discharge the heat absorbed by the hollow member 74 to the outside of the lighting device main body 70 by the atmosphere passing through the hollow member 74, so that a cooling effect can be obtained. .

JP 2010-153198 A JP 2007-200700 A

  By the way, in the lighting fixture disclosed in Patent Document 1, the axial fan 66 is covered with the casing 67, and air is taken into the casing 67 from the intake hole 67ba of the diffusion portion 67b. As indicated by the arrows, the air flows from the discharge hole 67bb of the diffusion portion 67b through the path of the opening 68a of the upper plate 68, the axial fan 66, the opening 63a of the drive board 63, and the opening 61a of the LED mounting board 61. Therefore, there is a possibility that the ventilation resistance of the air passing through the inside of the housing 67 is increased and the power consumption of the axial fan 66 is increased.

  Moreover, in the lighting fixture disclosed in Patent Document 1, since the LED mounting substrate 61, the drive substrate 63, and the heat radiation portions 64 and 65 are disposed in the housing 67, heat is easily trapped in the housing 67, There is a possibility that the temperature of the axial fan 66 itself becomes high. Here, generally, in an air cooling fan, a lubricant such as oil is used for a bearing portion. Further, the life of the air cooling fan is often determined mainly due to the deterioration of the lubricant. The deterioration of the lubricant depends on the temperature, and the higher the temperature, the faster the deterioration. Therefore, in the lighting fixture disclosed in Patent Document 1, the temperature of the axial fan 66 itself becomes high, the life of the axial fan 66 is shortened, and it may be difficult to ensure the same life as the LED 60. is there.

  Moreover, in the illuminating device disclosed in Patent Document 2, when the illuminating device is used by being embedded in an embedded hole penetrating the ceiling member, for example, the atmosphere or the second opening sucked from the first opening 74a. There is a possibility that the air discharged from the part 74b hits the ceiling member and winds up dust accumulated on the upper side of the ceiling member. Here, since the lighting device disclosed in Patent Document 2 has the first filter 76a attached to the first opening 74a and the second filter 76b attached to the second opening 74b, the first opening 74a. Therefore, it can be prevented that dust is sucked into the hollow member 74 and the cooling performance by the fan 75 is deteriorated or the fan 75 is broken.

  However, in the illuminating device disclosed in Patent Document 2, when this illuminating device is used by being embedded in the embedding hole of the ceiling member, the ventilation resistance of the air passing through the hollow member 74 due to clogging of the filters 76a and 76b. This may increase the power consumption of the fan 75. In addition, in the lighting device disclosed in Patent Document 2, when this lighting device is used by being embedded in an embedding hole of a ceiling member, periodic maintenance is required to suppress clogging of the filters 76a and 76b. There is a possibility. Further, in the lighting device disclosed in Patent Document 2, since the fan 75 is disposed in the hollow member 74 that absorbs heat generated by the LED element 72, the temperature of the fan 75 itself becomes high and the life of the fan 75 is increased. May be shorter.

  This invention is made | formed in view of the said reason, The objective is to provide the lighting fixture which can improve the reliability of an air cooling fan.

  The lighting fixture of the present invention includes a light source unit, a fixture main body that holds the light source unit, a heat radiating unit that radiates heat generated in the light source unit, and an air cooling fan that cools at least the heat radiating unit. And an air flow control unit that limits a range in which an air flow for cooling at least the heat radiating unit is blown out from the air cooling fan.

  In this lighting apparatus, it is preferable that the air cooling fan cools the apparatus main body.

  In this lighting apparatus, it is preferable that the airflow control unit is disposed so as to surround a part of the heat dissipation unit.

  In this lighting apparatus, it is preferable that the airflow control unit is configured by a part of the apparatus main body.

  In this lighting fixture, it is preferable that the light source unit is configured using an LED element.

  In the lighting fixture of this invention, it becomes possible to improve the reliability of an air cooling fan.

The lighting fixture of Embodiment 1 is shown, (a) is explanatory drawing explaining the flow of the airflow by an air cooling fan, (b) is a schematic top view. It is a schematic side view which shows the state which embedded the lighting fixture same as the above in the ceiling. The comparative example of a lighting fixture same as the above is shown, (a) is explanatory drawing explaining the flow of the airflow by an air cooling fan, (b) is a schematic top view. It is a schematic side view which shows the state embedded in the ceiling the comparative example of the lighting fixture same as the above. The lighting fixture of Embodiment 2 is shown, (a) is a schematic side view, (b) is explanatory drawing explaining the flow of the airflow by an air cooling fan. The lighting fixture of Embodiment 3 is shown, (a) is a schematic side view, (b) is explanatory drawing explaining the flow of the airflow by an air cooling fan. The lighting fixture of Embodiment 4 is shown, (a) is a schematic side view which shows the state embedded in the ceiling, (b) is explanatory drawing explaining the flow of the airflow by an air cooling fan. It is a schematic top view of a lighting fixture same as the above. It is explanatory drawing explaining the flow of the airflow by an air cooling fan in the lighting fixture of Embodiment 5. FIG. The lighting fixture same as the above is shown, (a) is a schematic top view, (b) is a schematic bottom view. It is a schematic sectional drawing which shows the state which embedded the lighting fixture of the prior art example in the ceiling. (A) is a schematic perspective view, (b) is a schematic perspective view of the unit for cooling regarding the other lighting fixture of a prior art example.

(Embodiment 1)
Hereinafter, the lighting fixture of this embodiment is demonstrated, referring FIG. 1 and FIG.

  The lighting fixture of this embodiment includes a light source unit 1 having a light source 5, a fixture body 2 that holds the light source unit 1, a heat radiating unit 3 that radiates heat generated in the light source unit 1, and air cooling that cools the heat radiating unit 3. The fan 8 and the translucent cover 4 attached to the instrument main body 2 are provided on the front side of the light source unit 1 (the lower side in FIG. 1A). This luminaire is a downlight which is a kind of ceiling-embedded luminaire, and for example, an embedded hole 6a (see FIG. 2) penetrating through a ceiling member 6 (see FIG. 2) which is a structural material that partitions two spaces. (See FIG. 2).

  In the lighting fixture of the present embodiment, the light source unit 1 includes a plurality of light sources 5. Here, an LED element is used as the light source 5. The number of the light sources 5 in the light source unit 1 is not particularly limited. The light source unit 1 may use a fluorescent lamp or the like as the light source 5, and in this case, the number of the light sources 5 may be one or plural. Moreover, in the lighting fixture of this embodiment, the air cooling fan 8 cools the heat radiating part 3. The air cooling fan 8 should just be arrange | positioned so that the heat radiation part 3 may be cooled at least, and you may make it cool the instrument main body 2 besides the heat radiation part 3. FIG. Moreover, you may form the thermal radiation part 3 as a part of instrument main body 2. FIG. In any case, the heat radiating part 3 may be formed so as to be exposed and exposed (opened) to the outside air.

  The light source 5 is a fluorescent light composed of an LED chip that emits blue light (hereinafter referred to as a blue LED chip) and a yellow phosphor that emits broad yellow light when excited by the blue light emitted from the blue LED chip. The LED element which consists of white LED which obtains white light in combination with a body is used. The phosphor is not limited to the yellow phosphor, and, for example, a red phosphor and a green phosphor may be used. Moreover, as the light source 5, you may use the LED element which consists of white LED which obtains white light combining the LED chip | tip which radiates | emits purple-near ultraviolet rays, and red fluorescent substance, green fluorescent substance, and blue fluorescent substance. Moreover, as the light source 5, you may use the LED element which consists of white LED which obtains white light combining the LED chip which radiates | emits red light, the LED chip which radiates | emits green light, and a blue LED chip. Here, the emission color of the light source 5 is not limited to white.

  Therefore, in the lighting fixture of this embodiment, since the LED element is used as the light source 5 in the light source unit 1, the life of the light source unit 1 is extended as compared with the case where a fluorescent lamp is used as the light source 5 in the light source unit 1. It becomes possible to plan.

  Each light source 5 is made of, for example, a resin sheet (for example, an organic green sheet such as an epoxy resin sheet highly filled with fused silica) containing a filler made of a filler such as silica or alumina and having a low viscosity when heated. After a plastic sheet (not shown) having high thermal conductivity and high fluidity during heating is interposed between the instrument body 2 and the plastic sheet, the plastic sheet is heated to cause plastic deformation. It is fixed to.

  Moreover, the lighting fixture of this embodiment is provided with the circuit board (not shown) in which the conductor pattern which prescribes | regulates the connection relation of each light source 5 was formed. This circuit board is formed using, for example, a glass epoxy board, and a window hole through which a part of each light source 5 passes is formed at a portion corresponding to each light source 5. Note that the circuit board is disposed apart from a bottom 2a (described later) of the instrument body 2.

  The conductor pattern formed on the circuit board is designed so that the connection relationship between the plurality of light sources 5 is a serial connection relationship, and is electrically connected to a pair of power supply lines (not shown). It is connected. In addition, although this circuit board is formed using the glass epoxy board | substrate, you may form using not only this but a polyimide resin, a phenol resin, etc., for example.

  Here, in the lighting fixture of the present embodiment, the plurality of light sources 5 are connected in series, but the connection relationship of the plurality of light sources 5 is not particularly limited, and for example, they may be connected in parallel. A series connection and a parallel connection may be combined. Moreover, in the lighting fixture of this embodiment, each light source 5 is fixed to the fixture main body 2 using a plastic sheet, but not limited to this, for example, a mounting board formed using a metal base printed wiring board or the like After mounting a plurality of light sources 5, the mounting substrate may be attached to the instrument body 2 with a heat dissipation sheet having electrical insulation and thermal conductivity interposed therebetween.

  The instrument body 2 is made of aluminum. The instrument body 2 includes a plate-like (for example, disk-like) bottom portion 2a, a side portion 2b protruding from the outer peripheral edge of one surface side of the bottom portion 2a (the lower surface side in FIG. 1 (a)), It is comprised by the collar part 2c extended outward from the lower end part of the side part 2b. In addition, although the instrument main body 2 is formed with aluminum, it is preferable to form not only this but with a material with high heat conductivity compared with resin, for example, you may form with metals, such as stainless steel.

  The side part 2b is formed in a tapered cylindrical shape whose opening area gradually increases as the distance from the bottom part 2a increases. Further, a step portion 2g for attaching the cover 4 is formed on the inner peripheral portion on the lower end side of the side portion 2b. In addition, in the lighting fixture of this embodiment, although the shape of the bottom part 2a is circular shape, it is not restricted to this, For example, polygonal shape may be sufficient and elliptical shape may be sufficient.

  Moreover, in the lighting fixture of this embodiment, the fixture main body 2 constitutes a reflector portion that controls the light distribution of the light emitted from each light source 5 in the light source portion 1. In addition, in the lighting fixture of this embodiment, although the instrument main body 2 comprises the reflecting mirror part, you may provide the reflecting mirror part separate from the instrument main body 2. FIG.

  A power supply line insertion hole (not shown) through which the pair of power supply lines electrically connected to a power supply device (not shown) that supplies power to the light source unit 1 passes through the bottom 2a of the instrument body 2. It is installed. In addition, the above-mentioned power supply device is arrange | positioned at the upper surface side of the ceiling member 6, for example.

  The heat radiating section 3 is composed of a plurality of plate-shaped heat radiating fins 3 a arranged on the other surface side (the upper surface side in FIG. 1A) of the bottom 2 a of the instrument body 2. The plurality of radiating fins 3a are arranged radially on the other surface side of the bottom 2a (see FIG. 1B). Moreover, the thermal radiation part 3 and the instrument main body 2 are integrally formed and thermally coupled, for example using the aluminum die-casting manufacturing method. Thereby, the lighting fixture of this embodiment can efficiently radiate the heat generated by each light source 5 in the light source unit 1 from the heat radiating unit 3 via the fixture body 2. In addition, in the lighting fixture of this embodiment, although the thermal radiation part 3 and the instrument main body 2 are formed integrally continuously, after forming the thermal radiation part 3 and the instrument main body 2 separately, the thermal radiation part 3 and the instrument main body are formed. 2 may be fixed.

  The cover 4 is formed of a plate-like (eg, disc-like) light-transmitting material (eg, silicone resin, acrylic resin, glass, etc.), and closes the opening 2d of the appliance body 2 so as to close the instrument body. 2 is attached to the step 2g. Light emitted from each light source 5 in the light source unit 1 passes through the cover 4 and is emitted to the outside. Further, the light emitted from each light source 5 in the light source unit 1 and reflected by the inner bottom surface 2e and the inner side surface 2f of the instrument body 2 is also transmitted through the cover 4 and emitted to the outside. In addition, in the lighting fixture of this embodiment, although the shape of the cover 4 is circular shape, it is not restricted to this, For example, polygonal shape may be sufficient and elliptical shape may be sufficient.

  The air cooling fan 8 is, for example, an axial fan or the like, and is attached to the upper end of the heat radiating unit 3. In addition, the air cooling fan 8 has a rotating shaft (not shown) to which the blades 8a are attached rotates clockwise or counterclockwise about a bearing portion (not shown) in FIG. 1 (a). As shown by the arrows in FIG. 1, air is taken in from the intake side (upper side in FIG. 1 (a)) of the air cooling fan 8 and blown out from the outlet side (lower side in FIG. 1 (a)) of the air cooling fan 8. . Therefore, the air cooling fan 8 can cool the heat radiating unit 3 by the air current generated by the air blown out from the blowing side of the air cooling fan 8. That is, in the lighting fixture of the present embodiment, the airflow blown from the blowing side of the air cooling fan 8 cools the heat radiating unit 3, so that the heat dissipation of the lighting fixture can be improved. In other words, the lighting fixture of the present embodiment efficiently absorbs heat generated by each light source 5 in the light source unit 1 and transferred to the heat radiating unit 3 through the fixture body 2 by the airflow from the air cooling fan 8. Is possible. Moreover, in the lighting fixture of this embodiment, the air cooling fan 8 also cools the fixture main body 2 in addition to the heat radiating portion 3, so that the heat radiating property of the lighting fixture is improved as compared with the case where the air cooling fan 8 cools only the heat radiating portion 3. Further increase is possible. Thereby, in the lighting fixture of this embodiment, since the heat dissipation of a lighting fixture can further be improved, it becomes possible to suppress that the temperature of air cooling fan 8 itself becomes high, and the lifetime of the air cooling fan 8 becomes short. Can be suppressed.

  As shown in FIG. 2, the lighting fixture of the present embodiment has the flange 2 c of the fixture body 2 embedded in the lower surface of the ceiling member 6 in a state where the fixture body 2 is embedded in the embedded hole 6 a of the ceiling member 6. It is attached to the ceiling member 6 so as to be in contact with the peripheral portion of the hole 6a. Moreover, the lighting fixture of this embodiment is provided with a pair of attachment springs (not shown) made of leaf springs for attaching the appliance main body 2 to the ceiling member 6 on the side 2b of the appliance main body 2. Therefore, the lighting fixture of this embodiment is attached to the ceiling member 6 by clamping the ceiling member 6 between the flange portion 2c of the fixture body 2 and the pair of attachment springs from the thickness direction of the ceiling member 6. Note that a heat insulating material 7 is installed on the upper surface side of the ceiling member 6 on the side of the instrument body 2 so as to be separated from the instrument body 2.

  Moreover, in the lighting fixture of this embodiment, it is formed so that the thermal radiation part 3 and the air cooling fan 8 may be exposed and exposed to the open air on the upper surface side (ceiling back) of the ceiling member 6. Therefore, since the lighting fixture of the present embodiment exposes the heat radiating unit 3 and the air cooling fan 8, it is possible to reduce the airflow resistance of the air cooling fan 8 and to reduce the power consumption of the air cooling fan 8. It becomes possible. Moreover, since the lighting fixture of this embodiment has exposed the thermal radiation part 3 and the air cooling fan 8, it becomes possible to suppress that the temperature of the air cooling fan 8 itself becomes high, and the lifetime of the air cooling fan 8 is short. It becomes possible to suppress becoming. Moreover, since the air cooling fan 8 in the lighting fixture of this embodiment can suppress that the lifetime of this air cooling fan 8 becomes short, it is possible to ensure the lifetime equivalent to the light source 5 using an LED element. Become.

  Moreover, the lighting fixture of this embodiment has the airflow control part 9 which restrict | limits the range from which the airflow for blowing the air cooling fan 8 and cooling the thermal radiation part 3 flows out. In other words, the lighting fixture of this embodiment has the airflow control unit 9 that prevents the airflow generated by the air cooling fan 8 from hitting the ceiling member 6 and the heat insulating material 7.

  The airflow control unit 9 is formed of a cylindrical (for example, cylindrical) resin molded product, and surrounds the instrument main body 2 side of the side of the heat dissipation unit 3 on the other surface side of the bottom 2a of the instrument main body 2 Is arranged. Further, the airflow control unit 9 is attached to the peripheral portion on the other surface side of the bottom 2 a of the instrument main body 2.

  The outer diameter dimension of the airflow control unit 9 is set smaller than the inner diameter dimension of the embedding hole 6 a of the ceiling member 6. The inner diameter dimension of the airflow control unit 9 is set so that the airflow control unit 9 does not contact the heat radiating unit 3.

  The height dimension of the airflow control unit 9 is set so that the airflow blown from the blowing side of the air cooling fan 8 and cooled the heat radiating unit 3 flows upward as indicated by the arrows shown in FIG. Yes.

  Here, in the lighting fixture of the present embodiment, the airflow control unit 9 is configured to surround the instrument main body 2 side of the side of the heat dissipation unit 3, but may be configured to surround the side of the heat dissipation unit 3.

  Therefore, in the lighting fixture of the present embodiment, the airflow control unit 9 is arranged on the other surface side of the bottom 2a of the fixture body 2 so as to surround the fixture body 2 side of the side of the heat radiating portion 3. When the fixture body 2 is embedded in the embedded hole 6a of the member 6, even if the distance between the lighting fixture and the heat insulating material 7 is not sufficiently secured, the air current generated by the air cooling fan 8 is generated by the ceiling member 6 or the heat insulating material 7. It is possible to prevent hitting. Moreover, in the lighting fixture of this embodiment, since it can prevent that the airflow by the air cooling fan 8 hits the ceiling member 6 or the heat insulating material 7, it suppresses sucking in dust and dust from the intake side of the air cooling fan 8. Therefore, it is possible to suppress a decrease in the ability of the air cooling fan 8 to cool the heat radiation unit 3.

  By the way, when the fixture main body 2 of the lighting fixture of the comparative example which does not provide the airflow control part 9 as shown in FIG. 3 and FIG. 4 is embedded and used in the embedding hole 6a of the ceiling member 6, FIG. As indicated by the arrows shown in the figure, the airflow blown from the blowout side of the air cooling fan 8 and cooled the heat radiating portion 3 hits the ceiling member 6 and the heat insulating material 7, and dust or heat insulating material 7 accumulated on the ceiling member 6. Sometimes dust or dust adhering to itself was rolled up. 3 and FIG. 4, dust and dust are taken up by the air flow of the air cooling fan 8 and sucked from the intake side of the air cooling fan 8 and cooled by the air cooling fan 8. There is a possibility that the performance is lowered or the air cooling fan 8 is broken.

  In general, it is desired that a lighting fixture used by being embedded in an embedding hole penetrating the ceiling member is constructed separately from a heat insulating material installed on the upper surface side of the ceiling member. There is a concern that the contractor may not ensure a sufficient distance from the heat insulating material or contact the heat insulating material. In such a situation, in the lighting apparatus having the configuration shown in FIGS. 3 and 4, there is a high possibility that the airflow from the air cooling fan 8 hits the ceiling member 6 and the heat insulating material 7. It is conceivable that dust is frequently sucked in, or the ability of the air cooling fan 8 to cool the heat radiating unit 3 is reduced.

  In the lighting fixture of this embodiment, by providing the airflow control unit 9 that prevents the airflow from the air cooling fan 8 from hitting the ceiling member 6 and the heat insulating material 7, it is possible to wind up dust and dust by the airflow from the air cooling fan 8. Therefore, it is possible to prevent the cooling performance of the air cooling fan 8 from being deteriorated or the air cooling fan 8 from being broken down.

  Here, although the airflow control part 9 of this embodiment is formed with the resin molded product, you may form not only this but metals, such as aluminum and stainless steel, for example. In the lighting fixture of this embodiment, it becomes possible to comprise the airflow control part 9 by a part of the instrument main body 2 by employ | adopting aluminum as a material which forms the airflow control part 9. FIG. Therefore, in the lighting fixture of this embodiment, it becomes possible to reduce the assembly man-hour of a lighting fixture by comprising the airflow control part 9 by a part of the instrument main body 2. FIG.

  Moreover, in the lighting fixture of this embodiment, although the airflow control part 9 is arrange | positioned on the said other surface side of the bottom part 2a of the instrument main body 2 in the form surrounding the instrument main body 2 side of the side part of the thermal radiation part 3, The arrangement place of the control unit 9 is not limited to this, and may be arranged on the outer surface of the side part 2b of the instrument body 2, for example. In short, the air flow control unit 9 may be disposed in a place where the air flow by the air cooling fan 8 can be controlled in the instrument main body 2.

  Thus, in the lighting fixture of the present embodiment, the air flow control unit 9 that exposes the heat radiating unit 3 and the air cooling fan 8 and restricts the range from which the air flow that is blown out of the air cooling fan 8 and cools the heat radiating unit 3 flows out. Therefore, it is possible to improve the reliability of the air cooling fan 8.

(Embodiment 2)
Hereinafter, the lighting fixture of this embodiment is demonstrated, referring FIG.

  The basic configuration of the lighting fixture of the present embodiment is the same as that of the first embodiment, and the shape of the airflow control unit 9 is different from that of the first embodiment as shown in FIG. In addition, the same code | symbol is attached | subjected to the component similar to Embodiment 1, and description is abbreviate | omitted suitably.

  The airflow control unit 9 is disposed on the other surface side (the upper surface side in FIG. 5) of the bottom 2 a of the instrument main body 2 so as to surround the instrument main body 2 side of the side of the heat radiating unit 3. Further, the airflow control unit 9 is attached to the peripheral portion on the other surface side of the bottom 2 a of the instrument main body 2. Moreover, the airflow control part 9 is formed in the taper cylinder shape from which an opening area becomes large gradually as it leaves | separates from the bottom part 2a.

  Here, also in the lighting fixture of this embodiment, although the airflow control part 9 is made into the form which surrounds the instrument main body 2 side of the side part of the thermal radiation part 3, you may make it the form which surrounds the side part of the thermal radiation part 3. FIG.

  Therefore, in the lighting fixture of this embodiment, the shape of the airflow control unit 9 is a tapered cylindrical shape, so that air cooling is performed as compared with the lighting fixture of Embodiment 1 as indicated by the arrow shown in FIG. The airflow resistance of the fan 8 can be further reduced, and the power consumption of the air cooling fan 8 can be further reduced. Moreover, in the lighting fixture of this embodiment, generation | occurrence | production of the turbulent flow inside the airflow control part 9 is suppressed compared with the lighting fixture of Embodiment 1 by making the shape of the airflow control part 9 into a taper cylinder shape. It becomes possible.

(Embodiment 3)
Hereinafter, the lighting fixture of this embodiment is demonstrated, referring FIG.

  The basic configuration of the lighting fixture of the present embodiment is the same as that of the first embodiment, and the configuration of the airflow control unit 9 is different from that of the first embodiment as shown in FIG. In addition, the same code | symbol is attached | subjected to the component similar to Embodiment 1, and description is abbreviate | omitted suitably.

  The airflow control unit 9 is constituted by a part of the instrument body 2 so as to surround the instrument body 2 side of the side of the heat dissipation part 3, and an airflow for cooling the heat dissipation part 3 flows out from the air cooling fan 8. Limit the range. Here, on the other surface side (the upper surface side in FIG. 6) of the bottom portion 2 a of the instrument main body 2, the frame portion 15 for arranging the heat radiating portion 3 and surrounding the instrument main body 2 side of the side portion of the heat radiating portion 3. Is formed. The frame portion 15 is configured by an inner side surface 15 b that surrounds the instrument body 2 side of the side of the heat radiating section 3 and the other surface side of the bottom portion 2 a of the instrument body 2.

  The frame portion 15 is formed in a bottomed cylindrical shape whose opening area gradually increases as the distance from the other surface side of the bottom portion 2a increases. Therefore, in the lighting fixture of the present embodiment, the shape of the frame portion 15 is shown in FIG. 6B by making the shape of the frame 15 a bottomed cylinder whose opening area gradually increases as the distance from the other surface side of the bottom portion 2a increases. As indicated by the arrows, the airflow resistance of the air cooling fan 8 can be further reduced as compared with the lighting apparatus of the first embodiment, and the power consumption of the air cooling fan 8 can be further reduced.

  Here, in the lighting fixture of the present embodiment, the airflow control unit 9 is configured to surround the instrument main body 2 side of the side of the heat dissipation unit 3, but may be configured to surround the side of the heat dissipation unit 3.

  Therefore, also in the lighting fixture of this embodiment, the air flow control unit 9 that exposes the heat radiating unit 3 and the air cooling fan 8 and restricts the range in which the air flow that is blown out of the air cooling fan 8 and cools the heat radiating unit 3 flows out. Therefore, it is possible to improve the reliability of the air cooling fan 8. Moreover, in the lighting fixture of this embodiment, since the airflow control part 9 is comprised by some instrument main bodies 2, the separate member for forming the airflow control part 9 becomes unnecessary, and the assembly man-hour of a lighting fixture is reduced. It becomes possible to do.

(Embodiment 4)
Hereinafter, the lighting fixture of this embodiment is demonstrated, referring FIG. 7 and FIG.

  The basic configuration of the lighting fixture of the present embodiment is substantially the same as that of the first embodiment. As shown in FIG. 7, the arrangement of the radiation fins 3a, the arrangement of the air cooling fans 8, the shape of the airflow control unit 9, etc. This is different from the first embodiment. In addition, the same code | symbol is attached | subjected to the component similar to Embodiment 1, and description is abbreviate | omitted suitably.

  A plurality (six in FIG. 8) of radiating fins 3a are arranged in a direction perpendicular to one radial direction of the circular bottom 2a on the other surface side (upper surface side in FIG. 7) of the bottom 2a of the instrument body 2. They are arranged side by side.

  The air-cooling fan 8 is disposed on one end side (left side in FIG. 7) in the radial direction of each radiating fin 3 a on the other surface side of the bottom 2 a of the instrument body 2. In short, the air cooling fan 8 is disposed on the side of the heat radiating unit 3.

  In addition, the air cooling fan 8 has a rotating shaft (not shown) to which the blades 8a are attached rotates clockwise or counterclockwise around a bearing portion (not shown) in FIG. 7B. As shown by the arrows in FIG. 7, air is taken in from the intake side (left side in FIG. 7B) of the air cooling fan 8, and air is blown out from the outlet side (right side in FIG. 7B) of the air cooling fan 8. Therefore, the air cooling fan 8 can cool the heat radiating unit 3 by the air current generated by the air blown out from the blowing side of the air cooling fan 8. That is, also in the lighting fixture of this embodiment, it becomes possible to improve the heat dissipation of a lighting fixture, when the airflow which blown off from the blowing side of the air cooling fan 8 cools the thermal radiation part 3. FIG. In other words, even in the lighting fixture of the present embodiment, the heat generated by each light source 5 in the light source unit 1 and transferred to the heat radiating unit 3 through the fixture body 2 is efficiently absorbed by the airflow from the air cooling fan 8. Is possible.

  Here, in the lighting fixture of the present embodiment, as shown in FIG. 8, each of the heat radiating fins 3 a is arranged three by three symmetrically about one diameter of the bottom portion 2 a and further away from the air cooling fan 8. It arrange | positions so that the distance between each radiation fin 3a located in left-right symmetry may become large gradually. Therefore, in the lighting fixture of the present embodiment, each radiating fin 3a is arranged so that the airflow from the air cooling fan 8 hits both surfaces in the thickness direction of these radiating fins 3a. It is possible to efficiently cool the heat generated by each light source 5 in the light source unit 1 and transferred to the heat radiating unit 3 through the instrument main body 2 by the air flow.

  Moreover, each radiation fin 3a is arrange | positioned so that obstruction | occlusion of the airflow blown from the blowing side of the air cooling fan 8 may be suppressed. Thereby, in the lighting fixture of this embodiment, it becomes possible to make small ventilation resistance of the air which passes the air-cooling fan 8, and it becomes possible to reduce the power consumption of the air-cooling fan 8. FIG.

  The air cooling fan 8 is disposed away from the heat radiating unit 3. In other words, the air gap 16 is provided between the air cooling fan 8 and the heat radiating unit 3. Therefore, in the lighting fixture of this embodiment, since the air cooling fan 8 is arrange | positioned away from the thermal radiation part 3, it can suppress that the temperature of the air cooling fan 8 itself becomes high, and the lifetime of the air cooling fan 8 is short. It becomes possible to suppress becoming.

  The airflow control unit 9 is disposed on the other surface side of the bottom 2a of the instrument body 2 so as to surround the instrument body 2 side of the other radial end portion (right side portion in FIG. 7) of each radiating fin portion 3a. Therefore, the range in which the airflow that is blown out from the air cooling fan 8 and cools the heat radiating unit 3 flows out is limited. Hereinafter, for convenience of explanation, the airflow control unit 9 is also referred to as a first airflow control unit 9b.

  The first air flow control unit 9 b is attached to the peripheral portion on the other surface side of the bottom 2 a of the instrument main body 2. Moreover, the 1st airflow control part 9b is formed so that the distance with the thermal radiation part 3 may become large gradually as it leaves | separates from the bottom part 2a of the instrument main body 2. As shown in FIG. That is, the first airflow control unit 9b is formed so that the airflow resistance of the airflow blown from the blowing side of the air cooling fan 8 is reduced.

  Moreover, the lighting fixture of this embodiment has the 2nd airflow control part 9a which restrict | limits the range into which the airflow sucked from the suction side of the air cooling fan 8 flows into the air cooling fan 8. FIG. In other words, the lighting fixture of this embodiment has the 2nd airflow control part 9a which prevents the airflow suck | inhaled by the suction side of the air cooling fan 8 from hitting the ceiling member 6 or the heat insulating material 7. FIG. In addition, the 2nd airflow control part 9a is comprised separately from the 1st airflow control part 9b.

  The second air flow control unit 9 a is disposed on the other surface side of the bottom 2 a of the instrument body 2 so as to surround the instrument body 2 side on the intake side of the air cooling fan 8. The second air flow control unit 9 a is attached to the peripheral portion on the other surface side of the bottom 2 a of the instrument main body 2. The second airflow control unit 9a is formed so that the distance from the air cooling fan 8 gradually increases as the distance from the bottom 2a of the instrument body 2 increases. That is, the second airflow control unit 9a is formed so that the airflow resistance of the airflow sucked from the intake side of the air cooling fan 8 is reduced. In addition, the height dimension of the 2nd airflow control part 9a may be set to the same dimension as the height dimension of the 1st airflow control part 9b, and may be set to a different dimension.

  Therefore, the lighting fixture of the present embodiment also has the airflow control unit 9 that restricts the range in which the airflow that is blown out from the air cooling fan 8 and cools the heat radiating unit 3 flows out. It becomes possible to prevent winding up, and it is possible to suppress the cooling performance by the air cooling fan 8 from being lowered or the air cooling fan 8 from being broken down.

  Here, in the lighting fixture of this embodiment, although the 1st airflow control part 9b is made into the form surrounding the instrument main body side of the said other end part of the said radial direction in each radiation fin part 3a, each radiation fin part 3a. It is also possible to surround the other end in the radial direction. Moreover, in the lighting fixture of this embodiment, although the 2nd airflow control part 9a is made into the shape which surrounds the instrument main body 2 side in the suction side of the air cooling fan 8, you may make it the shape which surrounds the suction side of the air cooling fan 8. .

  Therefore, also in the lighting fixture of this embodiment, the air flow control unit 9 that exposes the heat radiating unit 3 and the air cooling fan 8 and restricts the range in which the air flow that is blown out of the air cooling fan 8 and cools the heat radiating unit 3 flows out. Therefore, it is possible to improve the reliability of the air cooling fan 8.

(Embodiment 5)
Hereinafter, the lighting fixture of this embodiment is demonstrated, referring FIG. 9 and FIG.

  The basic configuration of the lighting fixture of the present embodiment is substantially the same as that of the fourth embodiment. As shown in FIGS. 9 and 10, the shape of the bottom 2a of the fixture body 2 is different from that of the fourth embodiment. In addition, the same code | symbol is attached | subjected to the component similar to Embodiment 4, and description is abbreviate | omitted suitably.

  The bottom 2a of the instrument body 2 is formed in a rectangular shape.

  Each light source 5 is arranged in a matrix of m rows and n columns (7 rows and 15 columns in FIG. 10) on the one surface side (the lower surface side in FIG. 9) of the bottom 2 a of the instrument body 2.

  The lighting fixture of this embodiment is a thin base light, and can obtain sufficient illuminance over a wide range. In addition, in the lighting fixture of this embodiment, although the shape of the bottom part 2a is made into the rectangular shape, not only this but an elliptical shape etc. may be sufficient, for example.

  A plurality (six in FIG. 10A) of heat radiation fins 3a are arranged side by side in the lateral direction of the bottom 2a on the other surface side (the upper surface side in FIG. 9) of the bottom 2a of the instrument body 2. .

  The air-cooling fan 8 is disposed on one end side in the longitudinal direction of the bottom portion 2a of each radiating fin 3a (on the left side in FIG. 10A) on the other surface side of the bottom portion 2a of the appliance main body 2. Here, in the lighting fixture of the present embodiment, a plurality of air cooling fans 8 (two in FIG. 10) are provided, and the plurality of air cooling fans 8 are arranged in parallel in the short direction of the bottom portion 2a. In short, each of the air cooling fans 8 is disposed on the side of the heat radiating unit 3. Therefore, in the lighting fixture of this embodiment, the rotating shaft (not shown) to which the blades 8a are attached in each of the air cooling fans 8 rotates clockwise or counterclockwise around the bearing portion (not shown). Thus, as indicated by the arrows shown in FIG. 9, air is taken in from the intake side (left side in FIG. 9) of each air cooling fan 8, and air is discharged from the outlet side (right side in FIG. 9) of each air cooling fan 8. Blow out. Therefore, each air cooling fan 8 can cool the heat radiating unit 3 by the airflow generated by the air blown out from the blowing side of the plurality of air cooling fans 8. That is, in the lighting fixture of this embodiment, it becomes possible to improve the heat dissipation of a lighting fixture, when the airflow which blown off from each blowing side of each air cooling fan 8 cools the thermal radiation part 3. FIG. In other words, in the lighting fixture of this embodiment, the heat generated by each light source 5 in the light source portion 1 and transferred to the heat radiating portion 3 via the fixture body 2 is efficiently absorbed by the airflow from each air cooling fan 8. It becomes possible.

  Here, the dimension between each radiation fin 3a is set so that the airflow from each air cooling fan 8 may flow above each light source 5 in the light source unit 1.

  The airflow control unit 9 surrounds the instrument main body 2 side of the other end part in the longitudinal direction of the bottom part 2a in each radiating fin part 3a (the right side part in FIG. 10 (a)). It is arrange | positioned at the surface side and restrict | limits the range from which each air cooling fan 8 blows off and the airflow for cooling the thermal radiation part 3 flows out. Hereinafter, for convenience of explanation, the airflow control unit 9 is also referred to as a first airflow control unit 9b.

  The first air flow control unit 9 b is attached to the peripheral portion on the other surface side of the bottom 2 a of the instrument main body 2.

  Moreover, the lighting fixture of this embodiment has the 2nd airflow control part 9a which restrict | limits the range into which the airflow sucked from each intake side of each air cooling fan 8 flows into each air cooling fan 8. FIG. In other words, the lighting fixture of this embodiment has the 2nd airflow control part 9a which prevents the airflow suck | inhaled by each inhalation | air-intake side of each air cooling fan 8 from hitting the ceiling member 6 and the heat insulating material 7. FIG. In addition, the 2nd airflow control part 9a is comprised separately from the 1st airflow control part 9b.

  The second air flow control unit 9 a is disposed on the other surface side of the bottom 2 a of the instrument body 2 so as to surround the instrument body 2 side on the intake side of each air cooling fan 8. The second air flow control unit 9 a is attached to the peripheral portion on the other surface side of the bottom 2 a of the instrument main body 2. Further, the second air flow control unit 9 a is formed so that the distance from each air cooling fan 8 gradually increases as the distance from the bottom 2 a of the instrument body 2 increases. That is, the second airflow control unit 9a is formed so that the airflow resistance of the airflow sucked from the intake side of each air cooling fan 8 is reduced. In addition, the height dimension of the 2nd airflow control part 9a may be set to the same dimension as the height dimension of the 1st airflow control part 9b, and may be set to a different dimension.

  Therefore, also in the lighting fixture of this embodiment, by having the airflow control part 9 which restrict | limits the range which the airflow for blowing out from each of each air cooling fan 8 and cooling the thermal radiation part 3 flows out, by the airflow of each air cooling fan 8 It is possible to prevent the dust and dust from being rolled up, and it is possible to suppress the cooling performance of each air cooling fan 8 from being lowered or the air cooling fans 8 from being broken down.

  Here, in the lighting fixture of the present embodiment, the first air flow control portion 9b is configured to surround the fixture main body 2 side of the other end portion in the longitudinal direction of the bottom portion 2a in each radiating fin portion 3a. You may make it the shape which surrounds the said other end part of the longitudinal direction of the bottom part 2a in the fin part 3a. Moreover, in the lighting fixture of this embodiment, although the 2nd airflow control part 9a is made into the shape which surrounds the instrument main body 2 side in each intake side of each air cooling fan 8, each intake side of each air cooling fan 8 is made into the shape. You may enclose it.

  Therefore, in the lighting fixture of the present embodiment, the heat radiating unit 3 and each air cooling fan 8 are exposed, and the range from which the airflow that blows out from each air cooling fan 8 and cools the heat radiating unit 3 flows out is limited. By having the airflow control unit 9, the reliability of each air cooling fan 8 can be improved.

DESCRIPTION OF SYMBOLS 1 Light source part 2 Appliance main body 3 Heat radiation part 8 Air cooling fan 9 Airflow control part

Claims (5)

  A light source unit; an instrument body that holds the light source unit; a heat radiating unit that radiates heat generated in the light source unit; and an air cooling fan that cools at least the heat radiating unit, wherein the heat radiating unit and the air cooling fan include: An illuminating device comprising an airflow control unit that is exposed and restricts a range in which an airflow for cooling at least the heat radiating unit blown out from the air cooling fan flows out.   The lighting apparatus according to claim 1, wherein the air cooling fan cools the apparatus main body.   The lighting apparatus according to claim 1, wherein the airflow control unit is arranged so as to surround a part of the heat dissipation unit.   The lighting apparatus according to any one of claims 1 to 3, wherein the airflow control unit is configured by a part of the apparatus main body.   The lighting device according to claim 1, wherein the light source unit is configured using an LED element.

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